CA1263466A - Electrochromic mirror - Google Patents
Electrochromic mirrorInfo
- Publication number
- CA1263466A CA1263466A CA000533125A CA533125A CA1263466A CA 1263466 A CA1263466 A CA 1263466A CA 000533125 A CA000533125 A CA 000533125A CA 533125 A CA533125 A CA 533125A CA 1263466 A CA1263466 A CA 1263466A
- Authority
- CA
- Canada
- Prior art keywords
- mirror
- layer
- solid electrolyte
- nickel hydroxide
- angstroms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
- G02F1/1533—Constructional details structural features not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/08—Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors
- B60R1/083—Anti-glare mirrors, e.g. "day-night" mirrors
- B60R1/088—Anti-glare mirrors, e.g. "day-night" mirrors using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/1514—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material
- G02F1/1523—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material comprising inorganic material
- G02F1/1524—Transition metal compounds
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
ELECTROCHROMIC MIRROR
ABSTRACT OF THE DISCLOSURE
The specification discloses an electrochromic mirror including a glass substrate, an anodic nickel hydroxide layer 300 to 600 angstroms thick, a solid electrolyte layer 1000 to 1500 angstroms thick, a cathodic tungsten oxide layer 600 to 1200 angstroms thick and a layer of reflective/conductive material.
ABSTRACT OF THE DISCLOSURE
The specification discloses an electrochromic mirror including a glass substrate, an anodic nickel hydroxide layer 300 to 600 angstroms thick, a solid electrolyte layer 1000 to 1500 angstroms thick, a cathodic tungsten oxide layer 600 to 1200 angstroms thick and a layer of reflective/conductive material.
Description
~63466 sAcKGRouND OF THE INVENTION
The present invention relates to vehicle rearview mirrors. One problem with rearview mirrors is that they can be very annoying at night. The lights of a following car can be blinding when they reflect into the driver's eyes from the rearview mirror.
With respect to interior mirrors, a common commercial solution to this problem is to utilize a prism mirror which can be mechanically shifted from a day position wherein one receives the maximum reflection of light entering the mirror to a night position where one sees only a small fraction of the light entering the mirror.
Studies show that in daylight, the mirror must have an image brightness of about 35%. Since tinted back windows usually transmit about 70% of the incident light, the interior mirror must reflect at least 50% of the incident light. Even this is unsatisfactory in terms of consumer acceptance. It is generally felt that consumer acceptance requires that the interior mirror have a reflectance of 60-70% in the daylight mode. In contrast for the night mode, interior mirror reflectance is preferably less than about 10%.1 One problem with mechanically shiftable prism mirrors is that slight adjustments of the mirror position, either accidentally or intentionally, can result in a complete change in the reflectivity which the driver sees.
lReflectance as used throughout refers to the percentage of incident light reflected as measured by the Society of Automotive Engineers Test SAEJ964A.
.' ' ' 1~63~66 1 Following such adjustments, the driver must again shift the mechanical mechanism to change the mode of the mirror.
Another problem with such mirrors is that if they are not ad~usted just right, one sees the ghosts of objects or people in the backseat in the rearview mirror at the same time one sees the lights of a following car. This can be disconcerting.
With exterior mirrors, the prismatic solution does not work. No solution to the problem is commercially available. Often, drivers simply adjust the outside rearview mirrors to an inoperative position. This is especially unsafe in the case of vehicles having no interior mirror.
It has been suggested that, in order to obviate the above problems, it would be desirable to darken a mirror electro-optically. By applying a charge to a liquid crystal rearview mirror, one could immediately darken the mirror to a night driving mode. ~owever, the use of a liquid crystal device as a rearview mirror has a number of significant drawbacks, not the least of which is excessive cost.
A liquid crystal mirror is too dark in the daylight mode, e.g., around 50% and are too reflective in night mode, e.g., around 15%. A liquid crystal device would require two pieces of glass which, in addition to being costly, could cause the driver to see double images. Also, it is extremely difficult to make a double glass liquid crystal mirror shatterproof. Any breakage of the seal of the liquid crystal would result in material oozing out of the mirror. Further, it would be extremely difficult to make a liquid crystal mirror in a concave or convex configuration as is often desired for rearview mirrors.
1 If one employed some type of automatic light sensing system to control the liquid crystal mirror, one would encounter "flickering". As a photocell sensed the lights of a following car, it would apply a voltage to the liquid crystal device which would immediately trigger it to its darkened state. AS the car passed, the mirror would immediately flip back to its more reflective mode.
It has been suggested that such drawbacks could be overcome by darkening a mirror electrochromically in response to night driving conditions, using solid state electrochromic materials. Electrochromism involves the use of layers of electrochromic material which darken in response to an applied voltage. Persistent electrochromic materials stay darkened in response to an initial voltage input. They then lighten again in response to a neutralizing voltaic input. The extent of darkening and lightening can be variably controlled in response to variable input from a light sensor, this eliminating any flickering problem.
Unfortunately, such electrochromic mirrors heretofore developed have been either too dark in the daylight, i.e., reflecting less than 70% of incident light, or have been too reflective at night, i.e., reflecting more than 10% of incident light. Also, such mirrors have been too slow in shifting from one mode to the other. This is extremely annoying to the driver who wants to be able to adjust his mirror instantly from daylight to night mode or from night to daylight mode.
Some electrochromic mirror suggestions have involved the use of extremely reactive reflective materials, such as alkali metals. These are extremely dangerous to . . .
i~i3'~
l work with and are difficult to protect environmentally in an automobile. Others have involved the use of very expensive materials. Some electrochromic devices also use two pieces of glass and thus suffer the same shattering and convex fabrication problems discussed above for liquid crystal mirrors.
It is probably for these reasons that to date, there are no commercially available electrochromic rearview mirrors.
SUMMARY OF THE INVENTION
The present invention comprises an electrochromic mirror which, in the different aspects of the invention, solves the foregoing problems. The problems of shifting speed and reflectivity spread between the night and daylight modes is solved by using, in the order indicated, a glass substrate, a conductive coating thereon, a layer of nickel hydroxide from 300 to 600 angstroms, and most preferably about 400 angstroms thick, a solid electrolyte layer, most preferably tantalum oxide, from about 1000 to about 1500 angstroms, and most preferably about 1300 angstroms thick, a layer of tungsten oxide from about 600 to about 1200 angstroms and most preferably 800 angstroms thick, and an aluminum reflective and conductive layer. In the broadest aspects of the invention, the nickel hydroxide and tungsten oxide can be reversed, but the above order as stated is surprisingly preferable. Light passes first through the glass substrate, then through the various other layers until it is reflected by the aluminum layer and passes back out through the foregoing layers.
This arrangement provides a mirror which will shift very rapidly from the night mode to the day mode, ~ .
46~i 1 i.e., in about one to three seconds. Further, in the daylight mode the mirror reflects about 70~ of the entering light and in the night mode reflects less than about 10% of the incident light.
These and other objects and advantages of the invention will be more fully understood and appreciated by reference to the written specification and appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic representation of a cross section of a mirror made in accordance with the present invention;
Fig. 2 is a chart readout of the mirror reflectivity as it is cycled between its modes.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment of the present invention is an electrochromic mirror comprising a plurality of solid state thin films deposited onto a single piece of glass 11 (Fig. 1). Neither the thickness nor type of glass used is critical. A typical glass substrate will be conventional soda glass at a thickness of from about one millimeter to about three millimeters. Use of a single piece of glass 11 greatly eases shatterproofing and convex fabrication problems discussed above.
The first layer deposited on glass substrate 11 is conductive layer 1. Conductive layer 1 can be of any conventional electroconductive coating, such as indium-tin oxide, tin oxide or cadmium stannate. The thickness of this layer is not critical, so long as it adequately conducts electricity across its entire surface. Also, its thickness should be selected so that the transmission of light through i~ti3466 1 the electroconductive layer is maximized. In this regard, it is convenient to work with half wavelength or full wavelength optical thicknesses of the median wavelength for visible light (5500 angstroms). Optical thickness is physical thickness multiplied by the index of refraction of the material. In the case of indium-tin oxide, the index of refraction is about 1.7. Hence, an indium-tin oxide layer preferably has a thickness of approximately 1600 angstroms.
This is about one-half wavelength in optical thickness (1600 x 1.7 = 2720). It is sufficiently thick to provide excellent conductivity (sheet resistance typically 10-15 ohms/square) across its entire surface and yet is sufficiently thin that it does not excessively darken the mirror.
The second layer applied is a nickel hydroxide electrochromic layer 2. Nickel hydroxide is an anodic electrochromic material in that it colors when electrically connected to a positive electrode. The thickness of the nickel hydroxide layer is critical. If it is too thick, the mirror will have low reflectivity. The nickel hydroxide layer will give the mirror a constant brownish cast. The mirror will be too dark for normal daylight use. Further, the mirror will be too slow in changing from daylight mode to night mode and visa versa.
On the other hand if the nickel hydroxide layer is too thin, the mirror will not darken sufficiently during nighttime conditions as a following car approaches. We have found that the nickel hydroxide layer must be from about 300 to about 600 angstroms thick. Most preferably, the nickel hydroxide layer is 400 angstroms thick.
The term "nickel hydroxide" as used herein must of 1 course be understood to encompass variations from stoichiometrically pure Ni(OH)2. Those skilled in the art will appreciate that the starting material for applying the nickel hydroxide layer is nickel oxide which, as explained below, is then hydrated to nickel hydroxide. It is not known whether such hydration ever becomes stoichiometrically complete.
The next layer applied to the mirror stack is a solid electrolytic layer 3. This layer serves to isolate the anodic and cathodic electrochromic layers. As such, it must be ion conducting, electron insulating, clear and must remain clear during bleaching of the electrochromic layers.
Suitable materials include tantalum pentoxide, cesium oxide, aluminum oxide, magnesium fluoride, silicon dioxide and - 15 mixtures thereof. Tantalum pentoxide is the most preferred material. The thickness of this layer is also critical. If too thick, the mirror does not shift between daylight and night modes rapidly enough. If this layer is too thin, the mirror will have too great a tendency to discharge from its colored to an uncolored state. We have found that the solid electrolyte layer must have a thickness of from about 1000 to about 1500 angstroms, and most preferably 1300 angstroms.
Electrochromic layer 4 is a cathodic electrochromic material comprising tungsten oxide. Cathodic electrochromic materials are those which color when connected to a negative electrode. Thus when the mirror stack is subjected to an appropriate potential difference, both the nickel hydroxide and tungsten oxide layers will color. When that potential is reversed, both layers will clear.
~i3466 1 The thickness of the tungsten oxide layer is also critical. If too thick, the mirror will respond too slowly to changes in light and will always be too dark. Daylight reflectivity will not be sufficient. If the layer is too thin, the mirror will not color sufficiently for nighttime conditions. We have found that the tungsten oxide layer should be from about 600 to about 1200 angstroms, and most preferably 800 angstroms.
Finally, an aluminum conductive and reflective layer 5 is applied. It is important only that this layer be sufficiently thick that it conducts readily over its entire surface and cannot be easily damaged. The aluminum layer serves both to reflect incident light and to conduct electricity to the tungsten oxide electrochromic layer. We have found that a thickness of from about 500 to about 1500 angstroms is adequate. The most preferable aluminum layer thickn~ss appears to be about 1000 angstroms.
It is preferable that the nickel hydroxide layer be deposited ahead of the tungsten oxide layer in order of exposure to incident light. If deposited in that order, the mirror of the present invention will, in its uncolored state, reflect in excess of 70% of the incident light. In the colored state, it will reflect less than 10% of the incident light.
In contrast if the tungsten oxide layer were deposited in front of the nickel hydroxide layer in order of exposure to incident light, the mirror, with the preferred layer thicknesses will reflect no more than about 60% of the incident light in its uncolored state. Altering layer thicknesses to increase reflectivity in the uncolored state results in the mirror reflecting too much light in its 3~f~6 1 colored state.
The half reactions which lead to the coloring and bleaching of the mirror stack are illustrated below:
WO + H + e ~ ~WO ~3 (c~ear) (blue) Ni(OH) C - NiOOH + H + e (clear~ (brown~
The liberated election is drawn through the power circuit to which the two electrodes are connected. The liberated hydrogen ion migrates through the ion permeable, solid electrolyte layer.
The various layers 1-5 in the mirror stack of the present invention can be deposited in any conventional manner. Different deposition methods can be employed for different layers. Such techniques are well-known to those skilled in the art for all of the materials used in the present invention.
Common modes of fabrication of the electrochromically active layers 2 and 4, and electrolyte insulating layer 3, include evaporation and sputter deposition. The starting materials include high purity tungsten oxide, nickel oxide and tantalum pentoxide. The availability of moisture during the manufacturing process is critical to ultimate device performance in order to facilitate conversion of the nickel oxide to nickel hydroxide. We find it beneficial to fabricate the mirrors in an environment of at least 30% relative humidity. We find it beneficial to purposely introduce controlled amounts of moisture into the vacuum chamber during deposition of the tungsten oxide, tantalum pentoxide and nickel oxide layers.
We also find it beneficial to operate the vacuum deposition chamber at as high a pressure as can be tolerated _g_ 4~i~
l in order to render layers 2, 3 and ~ somewhat porous in order that ion injection, e~ection and transmission is rapid. For example in evaporation coating, we find that backfilling the deposition chamber to a partial pressure of about 10 4 torr sufficiently reduces mean free path that the desired porous coatings are obtained.
EXPERIMENTAL RESULTS
Mirrors made in accordance with the present invention were tested for speed of response to changes in potential, reflectivity at potential extremes and durability through repeated cycling. The mirror in its uncolored state was subjected to a potential difference and the change in reflectivity was charted. In one second, the mirror was discharged and again, the change in reflectivity charted. A
typical chart readout is illustrated in Fig. 2.
The foregoing cycle was repeated over lO0,000 times. It was found that the mirror made in accordance with the present invention cycled from a reflectivity of in excess of 70% to a reflectivity of less than 10% in one to three seconds. This pattern continued through all lO0,000 plus cycles.
Of course, it is understood that the foregoing is merely a preferred embodiment of the invention and that various changes and alterations can be made without departing from the spirit and broader aspects thereof.
The present invention relates to vehicle rearview mirrors. One problem with rearview mirrors is that they can be very annoying at night. The lights of a following car can be blinding when they reflect into the driver's eyes from the rearview mirror.
With respect to interior mirrors, a common commercial solution to this problem is to utilize a prism mirror which can be mechanically shifted from a day position wherein one receives the maximum reflection of light entering the mirror to a night position where one sees only a small fraction of the light entering the mirror.
Studies show that in daylight, the mirror must have an image brightness of about 35%. Since tinted back windows usually transmit about 70% of the incident light, the interior mirror must reflect at least 50% of the incident light. Even this is unsatisfactory in terms of consumer acceptance. It is generally felt that consumer acceptance requires that the interior mirror have a reflectance of 60-70% in the daylight mode. In contrast for the night mode, interior mirror reflectance is preferably less than about 10%.1 One problem with mechanically shiftable prism mirrors is that slight adjustments of the mirror position, either accidentally or intentionally, can result in a complete change in the reflectivity which the driver sees.
lReflectance as used throughout refers to the percentage of incident light reflected as measured by the Society of Automotive Engineers Test SAEJ964A.
.' ' ' 1~63~66 1 Following such adjustments, the driver must again shift the mechanical mechanism to change the mode of the mirror.
Another problem with such mirrors is that if they are not ad~usted just right, one sees the ghosts of objects or people in the backseat in the rearview mirror at the same time one sees the lights of a following car. This can be disconcerting.
With exterior mirrors, the prismatic solution does not work. No solution to the problem is commercially available. Often, drivers simply adjust the outside rearview mirrors to an inoperative position. This is especially unsafe in the case of vehicles having no interior mirror.
It has been suggested that, in order to obviate the above problems, it would be desirable to darken a mirror electro-optically. By applying a charge to a liquid crystal rearview mirror, one could immediately darken the mirror to a night driving mode. ~owever, the use of a liquid crystal device as a rearview mirror has a number of significant drawbacks, not the least of which is excessive cost.
A liquid crystal mirror is too dark in the daylight mode, e.g., around 50% and are too reflective in night mode, e.g., around 15%. A liquid crystal device would require two pieces of glass which, in addition to being costly, could cause the driver to see double images. Also, it is extremely difficult to make a double glass liquid crystal mirror shatterproof. Any breakage of the seal of the liquid crystal would result in material oozing out of the mirror. Further, it would be extremely difficult to make a liquid crystal mirror in a concave or convex configuration as is often desired for rearview mirrors.
1 If one employed some type of automatic light sensing system to control the liquid crystal mirror, one would encounter "flickering". As a photocell sensed the lights of a following car, it would apply a voltage to the liquid crystal device which would immediately trigger it to its darkened state. AS the car passed, the mirror would immediately flip back to its more reflective mode.
It has been suggested that such drawbacks could be overcome by darkening a mirror electrochromically in response to night driving conditions, using solid state electrochromic materials. Electrochromism involves the use of layers of electrochromic material which darken in response to an applied voltage. Persistent electrochromic materials stay darkened in response to an initial voltage input. They then lighten again in response to a neutralizing voltaic input. The extent of darkening and lightening can be variably controlled in response to variable input from a light sensor, this eliminating any flickering problem.
Unfortunately, such electrochromic mirrors heretofore developed have been either too dark in the daylight, i.e., reflecting less than 70% of incident light, or have been too reflective at night, i.e., reflecting more than 10% of incident light. Also, such mirrors have been too slow in shifting from one mode to the other. This is extremely annoying to the driver who wants to be able to adjust his mirror instantly from daylight to night mode or from night to daylight mode.
Some electrochromic mirror suggestions have involved the use of extremely reactive reflective materials, such as alkali metals. These are extremely dangerous to . . .
i~i3'~
l work with and are difficult to protect environmentally in an automobile. Others have involved the use of very expensive materials. Some electrochromic devices also use two pieces of glass and thus suffer the same shattering and convex fabrication problems discussed above for liquid crystal mirrors.
It is probably for these reasons that to date, there are no commercially available electrochromic rearview mirrors.
SUMMARY OF THE INVENTION
The present invention comprises an electrochromic mirror which, in the different aspects of the invention, solves the foregoing problems. The problems of shifting speed and reflectivity spread between the night and daylight modes is solved by using, in the order indicated, a glass substrate, a conductive coating thereon, a layer of nickel hydroxide from 300 to 600 angstroms, and most preferably about 400 angstroms thick, a solid electrolyte layer, most preferably tantalum oxide, from about 1000 to about 1500 angstroms, and most preferably about 1300 angstroms thick, a layer of tungsten oxide from about 600 to about 1200 angstroms and most preferably 800 angstroms thick, and an aluminum reflective and conductive layer. In the broadest aspects of the invention, the nickel hydroxide and tungsten oxide can be reversed, but the above order as stated is surprisingly preferable. Light passes first through the glass substrate, then through the various other layers until it is reflected by the aluminum layer and passes back out through the foregoing layers.
This arrangement provides a mirror which will shift very rapidly from the night mode to the day mode, ~ .
46~i 1 i.e., in about one to three seconds. Further, in the daylight mode the mirror reflects about 70~ of the entering light and in the night mode reflects less than about 10% of the incident light.
These and other objects and advantages of the invention will be more fully understood and appreciated by reference to the written specification and appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic representation of a cross section of a mirror made in accordance with the present invention;
Fig. 2 is a chart readout of the mirror reflectivity as it is cycled between its modes.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment of the present invention is an electrochromic mirror comprising a plurality of solid state thin films deposited onto a single piece of glass 11 (Fig. 1). Neither the thickness nor type of glass used is critical. A typical glass substrate will be conventional soda glass at a thickness of from about one millimeter to about three millimeters. Use of a single piece of glass 11 greatly eases shatterproofing and convex fabrication problems discussed above.
The first layer deposited on glass substrate 11 is conductive layer 1. Conductive layer 1 can be of any conventional electroconductive coating, such as indium-tin oxide, tin oxide or cadmium stannate. The thickness of this layer is not critical, so long as it adequately conducts electricity across its entire surface. Also, its thickness should be selected so that the transmission of light through i~ti3466 1 the electroconductive layer is maximized. In this regard, it is convenient to work with half wavelength or full wavelength optical thicknesses of the median wavelength for visible light (5500 angstroms). Optical thickness is physical thickness multiplied by the index of refraction of the material. In the case of indium-tin oxide, the index of refraction is about 1.7. Hence, an indium-tin oxide layer preferably has a thickness of approximately 1600 angstroms.
This is about one-half wavelength in optical thickness (1600 x 1.7 = 2720). It is sufficiently thick to provide excellent conductivity (sheet resistance typically 10-15 ohms/square) across its entire surface and yet is sufficiently thin that it does not excessively darken the mirror.
The second layer applied is a nickel hydroxide electrochromic layer 2. Nickel hydroxide is an anodic electrochromic material in that it colors when electrically connected to a positive electrode. The thickness of the nickel hydroxide layer is critical. If it is too thick, the mirror will have low reflectivity. The nickel hydroxide layer will give the mirror a constant brownish cast. The mirror will be too dark for normal daylight use. Further, the mirror will be too slow in changing from daylight mode to night mode and visa versa.
On the other hand if the nickel hydroxide layer is too thin, the mirror will not darken sufficiently during nighttime conditions as a following car approaches. We have found that the nickel hydroxide layer must be from about 300 to about 600 angstroms thick. Most preferably, the nickel hydroxide layer is 400 angstroms thick.
The term "nickel hydroxide" as used herein must of 1 course be understood to encompass variations from stoichiometrically pure Ni(OH)2. Those skilled in the art will appreciate that the starting material for applying the nickel hydroxide layer is nickel oxide which, as explained below, is then hydrated to nickel hydroxide. It is not known whether such hydration ever becomes stoichiometrically complete.
The next layer applied to the mirror stack is a solid electrolytic layer 3. This layer serves to isolate the anodic and cathodic electrochromic layers. As such, it must be ion conducting, electron insulating, clear and must remain clear during bleaching of the electrochromic layers.
Suitable materials include tantalum pentoxide, cesium oxide, aluminum oxide, magnesium fluoride, silicon dioxide and - 15 mixtures thereof. Tantalum pentoxide is the most preferred material. The thickness of this layer is also critical. If too thick, the mirror does not shift between daylight and night modes rapidly enough. If this layer is too thin, the mirror will have too great a tendency to discharge from its colored to an uncolored state. We have found that the solid electrolyte layer must have a thickness of from about 1000 to about 1500 angstroms, and most preferably 1300 angstroms.
Electrochromic layer 4 is a cathodic electrochromic material comprising tungsten oxide. Cathodic electrochromic materials are those which color when connected to a negative electrode. Thus when the mirror stack is subjected to an appropriate potential difference, both the nickel hydroxide and tungsten oxide layers will color. When that potential is reversed, both layers will clear.
~i3466 1 The thickness of the tungsten oxide layer is also critical. If too thick, the mirror will respond too slowly to changes in light and will always be too dark. Daylight reflectivity will not be sufficient. If the layer is too thin, the mirror will not color sufficiently for nighttime conditions. We have found that the tungsten oxide layer should be from about 600 to about 1200 angstroms, and most preferably 800 angstroms.
Finally, an aluminum conductive and reflective layer 5 is applied. It is important only that this layer be sufficiently thick that it conducts readily over its entire surface and cannot be easily damaged. The aluminum layer serves both to reflect incident light and to conduct electricity to the tungsten oxide electrochromic layer. We have found that a thickness of from about 500 to about 1500 angstroms is adequate. The most preferable aluminum layer thickn~ss appears to be about 1000 angstroms.
It is preferable that the nickel hydroxide layer be deposited ahead of the tungsten oxide layer in order of exposure to incident light. If deposited in that order, the mirror of the present invention will, in its uncolored state, reflect in excess of 70% of the incident light. In the colored state, it will reflect less than 10% of the incident light.
In contrast if the tungsten oxide layer were deposited in front of the nickel hydroxide layer in order of exposure to incident light, the mirror, with the preferred layer thicknesses will reflect no more than about 60% of the incident light in its uncolored state. Altering layer thicknesses to increase reflectivity in the uncolored state results in the mirror reflecting too much light in its 3~f~6 1 colored state.
The half reactions which lead to the coloring and bleaching of the mirror stack are illustrated below:
WO + H + e ~ ~WO ~3 (c~ear) (blue) Ni(OH) C - NiOOH + H + e (clear~ (brown~
The liberated election is drawn through the power circuit to which the two electrodes are connected. The liberated hydrogen ion migrates through the ion permeable, solid electrolyte layer.
The various layers 1-5 in the mirror stack of the present invention can be deposited in any conventional manner. Different deposition methods can be employed for different layers. Such techniques are well-known to those skilled in the art for all of the materials used in the present invention.
Common modes of fabrication of the electrochromically active layers 2 and 4, and electrolyte insulating layer 3, include evaporation and sputter deposition. The starting materials include high purity tungsten oxide, nickel oxide and tantalum pentoxide. The availability of moisture during the manufacturing process is critical to ultimate device performance in order to facilitate conversion of the nickel oxide to nickel hydroxide. We find it beneficial to fabricate the mirrors in an environment of at least 30% relative humidity. We find it beneficial to purposely introduce controlled amounts of moisture into the vacuum chamber during deposition of the tungsten oxide, tantalum pentoxide and nickel oxide layers.
We also find it beneficial to operate the vacuum deposition chamber at as high a pressure as can be tolerated _g_ 4~i~
l in order to render layers 2, 3 and ~ somewhat porous in order that ion injection, e~ection and transmission is rapid. For example in evaporation coating, we find that backfilling the deposition chamber to a partial pressure of about 10 4 torr sufficiently reduces mean free path that the desired porous coatings are obtained.
EXPERIMENTAL RESULTS
Mirrors made in accordance with the present invention were tested for speed of response to changes in potential, reflectivity at potential extremes and durability through repeated cycling. The mirror in its uncolored state was subjected to a potential difference and the change in reflectivity was charted. In one second, the mirror was discharged and again, the change in reflectivity charted. A
typical chart readout is illustrated in Fig. 2.
The foregoing cycle was repeated over lO0,000 times. It was found that the mirror made in accordance with the present invention cycled from a reflectivity of in excess of 70% to a reflectivity of less than 10% in one to three seconds. This pattern continued through all lO0,000 plus cycles.
Of course, it is understood that the foregoing is merely a preferred embodiment of the invention and that various changes and alterations can be made without departing from the spirit and broader aspects thereof.
Claims
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows.
An electrochromic vehicle mirror which can be alternatively darkened or lightened to decrease or increase reflectivity comprising in the order indicated:
a glass substrate;
a conductive coating thereon; one of an anodic electrochromic layer of nickel hydroxide and a cathodic electrochromic layer of tungsten oxide;
a solid electrolyte layer;
the other of said cathodic electrochromic layer and said anodic electrochromic layer; and a layer of a reflective/conductive material;
where said anodic nickel hydroxide electrochromic layer has a thickness of from about 300 to about 600 angstroms, said solid electrolyte layer has a thickness of from about 1000 to about 1500 angstroms and said cathodic tungsten oxide electrochromic layer has a thickness of from about 600 to about 1200 angstroms.
The mirror of claim 1 in which said anodic layer has a thickness of about 400 angstroms, said solid electrolyte layer has a thickness of about 1300 angstroms and said cathodic electrochromic layer has a thickness of about 800 angstroms.
The mirror of claim 2 in which said nickel hydroxide layer is deposited before said tungsten oxide layer.
The mirror of claim 3 in which said conductive layer which is adjacent said glass substrate is indium-tin oxide.
The mirror of claim 4 in which said indium-tin oxide layer has a thickness of about 1600 angstroms.
The mirror of claim 5 in which said conductive/reflective layer is metallic aluminum.
The mirror of claim 6 in which said aluminum layer is from about 500 to about 1500 angstroms thick.
The mirror of claim 7 which has no glass layer other than said glass substrate.
The mirror of claim 8 in which each of said nickel hydroxide, tungsten oxide and solid electrolyte layers is sufficiently porous to effect rapid injection, ejection and transmission of ions.
The mirror of claim 9 in which said nickel hydroxide, solid electrolyte and tungsten oxide layers are deposited in partial vacuums in which back pressure is kept as high as possible without disrupting deposition.
The mirror of claim 10 in which said solid electrolyte layer is selected from the group consisting of:
tantalum pentoxide, cesium oxide, aluminum oxide, magnesium fluoride, silicon dioxide and mixtures thereof.
The mirror of claim 11 in which said solid electrolyte is tantalum pentoxide.
The mirror of claim 1 in which said nickel hydroxide layer is deposited before said tungsten oxide layer.
The mirror of claim 13 in which each of said nickel hydroxide, tungsten oxide and solid electrolyte layers is sufficiently porous to effect rapid injection, ejection and transmission of ions.
The mirror of claim 14 in which said nickel hydroxide, solid electrolyte and tungsten oxide layers are deposited in partial vacuums in which back pressure is kept as high as possible without disrupting deposition.
The mirror of claim 13 which has no glass layer other than said glass substrate.
The mirror of claim 1 in which each of said nickel hydroxide, tungsten oxide and solid electrolyte layers is sufficiently porous to effect rapid injection, ejection and transmission of ions.
The mirror of claim 17 in which said nickel hydroxide, solid electrolyte and tungsten oxide layers are deposited in partial vacuums in which back pressure is kept as high as possible without disrupting deposition.
The mirror of claim 1 in which said solid electrolyte layer is selected from the group consisting of:
tantalum pentoxide, cesium oxide, aluminum oxide, magnesium fluoride, silicon dioxide and mixtures thereof.
The mirror of claim 19 in which said solid electrolyte is tantalum pentoxide.
An electrochromic vehicle mirror which can be alternatively darkened or lightened to decrease or increase reflectivity comprising in the order indicated:
a glass substrate;
a conductive coating thereon; one of an anodic electrochromic layer of nickel hydroxide and a cathodic electrochromic layer of tungsten oxide;
a solid electrolyte layer;
the other of said cathodic electrochromic layer and said anodic electrochromic layer; and a layer of a reflective/conductive material;
where said anodic nickel hydroxide electrochromic layer has a thickness of from about 300 to about 600 angstroms, said solid electrolyte layer has a thickness of from about 1000 to about 1500 angstroms and said cathodic tungsten oxide electrochromic layer has a thickness of from about 600 to about 1200 angstroms.
The mirror of claim 1 in which said anodic layer has a thickness of about 400 angstroms, said solid electrolyte layer has a thickness of about 1300 angstroms and said cathodic electrochromic layer has a thickness of about 800 angstroms.
The mirror of claim 2 in which said nickel hydroxide layer is deposited before said tungsten oxide layer.
The mirror of claim 3 in which said conductive layer which is adjacent said glass substrate is indium-tin oxide.
The mirror of claim 4 in which said indium-tin oxide layer has a thickness of about 1600 angstroms.
The mirror of claim 5 in which said conductive/reflective layer is metallic aluminum.
The mirror of claim 6 in which said aluminum layer is from about 500 to about 1500 angstroms thick.
The mirror of claim 7 which has no glass layer other than said glass substrate.
The mirror of claim 8 in which each of said nickel hydroxide, tungsten oxide and solid electrolyte layers is sufficiently porous to effect rapid injection, ejection and transmission of ions.
The mirror of claim 9 in which said nickel hydroxide, solid electrolyte and tungsten oxide layers are deposited in partial vacuums in which back pressure is kept as high as possible without disrupting deposition.
The mirror of claim 10 in which said solid electrolyte layer is selected from the group consisting of:
tantalum pentoxide, cesium oxide, aluminum oxide, magnesium fluoride, silicon dioxide and mixtures thereof.
The mirror of claim 11 in which said solid electrolyte is tantalum pentoxide.
The mirror of claim 1 in which said nickel hydroxide layer is deposited before said tungsten oxide layer.
The mirror of claim 13 in which each of said nickel hydroxide, tungsten oxide and solid electrolyte layers is sufficiently porous to effect rapid injection, ejection and transmission of ions.
The mirror of claim 14 in which said nickel hydroxide, solid electrolyte and tungsten oxide layers are deposited in partial vacuums in which back pressure is kept as high as possible without disrupting deposition.
The mirror of claim 13 which has no glass layer other than said glass substrate.
The mirror of claim 1 in which each of said nickel hydroxide, tungsten oxide and solid electrolyte layers is sufficiently porous to effect rapid injection, ejection and transmission of ions.
The mirror of claim 17 in which said nickel hydroxide, solid electrolyte and tungsten oxide layers are deposited in partial vacuums in which back pressure is kept as high as possible without disrupting deposition.
The mirror of claim 1 in which said solid electrolyte layer is selected from the group consisting of:
tantalum pentoxide, cesium oxide, aluminum oxide, magnesium fluoride, silicon dioxide and mixtures thereof.
The mirror of claim 19 in which said solid electrolyte is tantalum pentoxide.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US847,192 | 1986-04-02 | ||
US06/847,192 US4712879A (en) | 1986-04-02 | 1986-04-02 | Electrochromic mirror |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1263466A true CA1263466A (en) | 1989-11-28 |
Family
ID=25300027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000533125A Expired CA1263466A (en) | 1986-04-02 | 1987-03-27 | Electrochromic mirror |
Country Status (6)
Country | Link |
---|---|
US (1) | US4712879A (en) |
EP (1) | EP0241217B1 (en) |
JP (1) | JPS6323135A (en) |
AU (1) | AU586547B2 (en) |
CA (1) | CA1263466A (en) |
DE (1) | DE3784536T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5757537A (en) * | 1991-09-04 | 1998-05-26 | Sun Active Glass Electrochromics, Inc. | Electrochromic devices and methods |
Families Citing this family (160)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5128799B1 (en) * | 1986-03-31 | 1996-11-05 | Gentex Corp | Variable reflectance motor vehicle mirror |
US4902108A (en) * | 1986-03-31 | 1990-02-20 | Gentex Corporation | Single-compartment, self-erasing, solution-phase electrochromic devices, solutions for use therein, and uses thereof |
US5282077A (en) * | 1986-03-31 | 1994-01-25 | Gentex Corporation | Variable reflectance mirror |
DE3736075A1 (en) * | 1987-10-24 | 1989-05-03 | Schott Glaswerke | ELECTROCHROMIC LAYER PACKAGE |
US4837592A (en) * | 1987-12-24 | 1989-06-06 | Ford Motor Company | Method of making an electrochromic layer and new electrochromic device made therefrom |
US5614885A (en) * | 1988-12-05 | 1997-03-25 | Prince Corporation | Electrical control system for vehicle options |
US5266626A (en) * | 1989-02-22 | 1993-11-30 | Norsolor | Thermoplastic elastomer based on an ethylene/α-olefin copolymer and on polynorbornene |
US5086351A (en) * | 1989-07-13 | 1992-02-04 | M&T Chemicals, Inc. | Electrochromic elements, materials for use in such element, processes for making such elements and such materials and use of such element in an electrochromic glass device |
US5274493A (en) * | 1989-07-13 | 1993-12-28 | Elf Atochem North America, Inc. | Electrochromic element, materials for use in such element, processes for making such element and such materials and use of such element in an electrochromic glass device |
US5066112A (en) * | 1989-12-21 | 1991-11-19 | Donnelly Corporation | Perimeter coated, electro-optic mirror |
US5457564A (en) * | 1990-02-26 | 1995-10-10 | Molecular Displays, Inc. | Complementary surface confined polymer electrochromic materials, systems, and methods of fabrication therefor |
US5818636A (en) * | 1990-02-26 | 1998-10-06 | Molecular Displays, Inc. | Complementary surface confined polmer electrochromic materials, systems, and methods of fabrication therefor |
US5446576A (en) * | 1990-11-26 | 1995-08-29 | Donnelly Corporation | Electrochromic mirror for vehicles with illumination and heating control |
US5220317A (en) * | 1990-12-11 | 1993-06-15 | Donnelly Corporation | Electrochromic device capable of prolonged coloration |
US5239405A (en) * | 1991-09-06 | 1993-08-24 | Donnelly Corporation | Electrochemichromic solutions, processes for preparing and using the same, and devices manufactured with the same |
US5500760A (en) * | 1991-09-06 | 1996-03-19 | Donnelly Corporation | Electrochemichromic solutions, processes for preparing and using the same, and devices manufactured with the same |
US5233461A (en) * | 1991-09-06 | 1993-08-03 | Donnelly Corporation | Methods for sealing electrochromic devices and devices manufactured thereby |
US5202787A (en) * | 1992-01-10 | 1993-04-13 | Gentex Corporation | Electro-optic device |
US5900275A (en) | 1992-07-15 | 1999-05-04 | Donnelly Corporation | Method for reducing haze in tin oxide transparent conductive coatings |
US5277986A (en) * | 1992-07-15 | 1994-01-11 | Donnelly Corporation | Method for depositing high performing electrochromic layers |
DE4225637C1 (en) * | 1992-08-03 | 1993-09-30 | Schott Glaswerke | Electrochromic thin layer system - comprises substrate and cathodic and anodic electrochromic layers |
US6276821B1 (en) | 1992-12-16 | 2001-08-21 | Donnelly Corporation | Vehicle exterior mirror system with signal light |
EP1004649A3 (en) * | 1993-02-26 | 2000-07-26 | Donnelly Corporation | Electrochromic polymeric solid films, manufacturing electrochromic devices using such solid films, and processes for making such solid films and devices |
US5910854A (en) | 1993-02-26 | 1999-06-08 | Donnelly Corporation | Electrochromic polymeric solid films, manufacturing electrochromic devices using such solid films, and processes for making such solid films and devices |
JP2955453B2 (en) * | 1993-11-05 | 1999-10-04 | 株式会社東海理化電機製作所 | EC anti-glare mirror |
US5668663A (en) * | 1994-05-05 | 1997-09-16 | Donnelly Corporation | Electrochromic mirrors and devices |
DE69528123T2 (en) | 1994-07-19 | 2003-06-05 | Donnelly Corp | Automatic rear-view mirror system with automatic headlight actuation |
US6019475A (en) * | 1994-09-30 | 2000-02-01 | Donnelly Corporation | Modular rearview mirror assembly including an electronic control module |
US6891563B2 (en) | 1996-05-22 | 2005-05-10 | Donnelly Corporation | Vehicular vision system |
US5624176A (en) | 1995-10-25 | 1997-04-29 | Donnelly Corporation | Illuminated power tilt exterior mirror for vehicle |
US6039390A (en) * | 1996-08-20 | 2000-03-21 | Donnelly Corporation | Chromogenic window assembly construction and other chromogenic devices |
US6124886A (en) | 1997-08-25 | 2000-09-26 | Donnelly Corporation | Modular rearview mirror assembly |
US8294975B2 (en) | 1997-08-25 | 2012-10-23 | Donnelly Corporation | Automotive rearview mirror assembly |
US6250148B1 (en) | 1998-01-07 | 2001-06-26 | Donnelly Corporation | Rain sensor mount for use in a vehicle |
US6172613B1 (en) | 1998-02-18 | 2001-01-09 | Donnelly Corporation | Rearview mirror assembly incorporating vehicle information display |
US6326613B1 (en) | 1998-01-07 | 2001-12-04 | Donnelly Corporation | Vehicle interior mirror assembly adapted for containing a rain sensor |
US6445287B1 (en) | 2000-02-28 | 2002-09-03 | Donnelly Corporation | Tire inflation assistance monitoring system |
US8288711B2 (en) | 1998-01-07 | 2012-10-16 | Donnelly Corporation | Interior rearview mirror system with forwardly-viewing camera and a control |
US6477464B2 (en) | 2000-03-09 | 2002-11-05 | Donnelly Corporation | Complete mirror-based global-positioning system (GPS) navigation solution |
US6693517B2 (en) | 2000-04-21 | 2004-02-17 | Donnelly Corporation | Vehicle mirror assembly communicating wirelessly with vehicle accessories and occupants |
US6329925B1 (en) | 1999-11-24 | 2001-12-11 | Donnelly Corporation | Rearview mirror assembly with added feature modular display |
US6553308B1 (en) | 1999-04-29 | 2003-04-22 | Donnelly Corporation | Vehicle-based navigation system with smart map filtering, portable unit home-base registration and multiple navigation system preferential use |
US6317248B1 (en) | 1998-07-02 | 2001-11-13 | Donnelly Corporation | Busbars for electrically powered cells |
US6266177B1 (en) | 1999-11-18 | 2001-07-24 | Donnelly Corporation | Electrochromic devices |
ATE330818T1 (en) | 1999-11-24 | 2006-07-15 | Donnelly Corp | REARVIEW MIRROR WITH USEFUL FUNCTION |
AU2001243285A1 (en) | 2000-03-02 | 2001-09-12 | Donnelly Corporation | Video mirror systems incorporating an accessory module |
US7370983B2 (en) | 2000-03-02 | 2008-05-13 | Donnelly Corporation | Interior mirror assembly with display |
WO2007053710A2 (en) | 2005-11-01 | 2007-05-10 | Donnelly Corporation | Interior rearview mirror with display |
US7167796B2 (en) | 2000-03-09 | 2007-01-23 | Donnelly Corporation | Vehicle navigation system for use with a telematics system |
US6396408B2 (en) | 2000-03-31 | 2002-05-28 | Donnelly Corporation | Digital electrochromic circuit with a vehicle network |
US6672731B2 (en) | 2000-11-20 | 2004-01-06 | Donnelly Corporation | Vehicular rearview mirror with blind spot viewing system |
ES2287266T3 (en) | 2001-01-23 | 2007-12-16 | Donnelly Corporation | IMPROVED VEHICLE LIGHTING SYSTEM. |
US7581859B2 (en) | 2005-09-14 | 2009-09-01 | Donnelly Corp. | Display device for exterior rearview mirror |
US7255451B2 (en) | 2002-09-20 | 2007-08-14 | Donnelly Corporation | Electro-optic mirror cell |
BR0208128A (en) | 2001-03-19 | 2004-03-02 | Dow Global Technologies Inc | Addressable Electrochromic Array Display Device |
US6759945B2 (en) * | 2001-03-29 | 2004-07-06 | Vtec Technologies, Inc. | Variable transmittance birefringent device |
WO2003005118A1 (en) | 2001-07-02 | 2003-01-16 | Loctite Corporation | Epoxy-based composition |
JP2003273467A (en) * | 2002-03-15 | 2003-09-26 | Toshiba Corp | Semiconductor laser and method of manufacturing the same |
US6744549B2 (en) * | 2002-03-19 | 2004-06-01 | Dow Global Technologies Inc. | Electrochromic display device |
US6918674B2 (en) | 2002-05-03 | 2005-07-19 | Donnelly Corporation | Vehicle rearview mirror system |
US7329013B2 (en) | 2002-06-06 | 2008-02-12 | Donnelly Corporation | Interior rearview mirror system with compass |
WO2003105099A1 (en) | 2002-06-06 | 2003-12-18 | Donnelly Corporation | Interior rearview mirror system with compass |
TWI241431B (en) | 2002-09-18 | 2005-10-11 | Exon Science Inc | Electrochromic mirror and material of reflective layer |
WO2004103772A2 (en) | 2003-05-19 | 2004-12-02 | Donnelly Corporation | Mirror assembly for vehicle |
AU2003278863A1 (en) | 2002-09-20 | 2004-04-08 | Donnelly Corporation | Mirror reflective element assembly |
US7360932B2 (en) | 2004-06-01 | 2008-04-22 | Donnelly Corporation | Mirror assembly for vehicle |
US7184190B2 (en) | 2002-09-20 | 2007-02-27 | Donnelly Corporation | Electro-optic reflective element assembly |
US7310177B2 (en) | 2002-09-20 | 2007-12-18 | Donnelly Corporation | Electro-optic reflective element assembly |
EP1561144B1 (en) | 2002-11-05 | 2015-09-23 | Magna Mirrors of America, Inc. | Electro-optic reflective element assembly |
US7965336B2 (en) * | 2002-11-14 | 2011-06-21 | Donnelly Corporation | Imaging system for vehicle |
US7420756B2 (en) | 2003-05-20 | 2008-09-02 | Donnelly Corporation | Mirror reflective element |
US7012729B2 (en) * | 2003-05-30 | 2006-03-14 | Electro Chromix, Inc. | Non planar mirrors with planar electrochromic cavity |
US7446924B2 (en) | 2003-10-02 | 2008-11-04 | Donnelly Corporation | Mirror reflective element assembly including electronic component |
US7308341B2 (en) | 2003-10-14 | 2007-12-11 | Donnelly Corporation | Vehicle communication system |
TWI236985B (en) * | 2004-01-19 | 2005-08-01 | Exon Science Inc | Rearview mirror |
US8256821B2 (en) | 2004-12-15 | 2012-09-04 | Magna Donnelly Engineering Gmbh | Accessory module system for a vehicle window |
DE102004062770A1 (en) * | 2004-12-21 | 2006-06-22 | Tesa Ag | Single or double-sided adhesive tape for protection of electrochromic layer systems on mirrors |
US7400435B2 (en) | 2005-01-19 | 2008-07-15 | Donnelly Corporation | Mirror assembly with heater element |
US7372610B2 (en) | 2005-02-23 | 2008-05-13 | Sage Electrochromics, Inc. | Electrochromic devices and methods |
EP1883855B1 (en) | 2005-05-16 | 2011-07-20 | Donnelly Corporation | Vehicle mirror assembly with indicia at reflective element |
US7733555B2 (en) * | 2005-06-17 | 2010-06-08 | Electro Chromix, Inc. | Environmentally safe electrochromic mirrors |
US11498487B2 (en) | 2005-07-06 | 2022-11-15 | Magna Mirrors Of America, Inc. | Vehicular exterior mirror system with blind spot indicator |
US11242009B2 (en) | 2005-07-06 | 2022-02-08 | Donnelly Corporation | Vehicular exterior mirror system with blind spot indicator |
CN101816008A (en) * | 2005-10-28 | 2010-08-25 | 马格纳电子系统公司 | Camera module for vehicle vision system |
US11890991B2 (en) | 2006-10-24 | 2024-02-06 | Magna Mirrors Of America, Inc. | Vehicular exterior rearview mirror assembly with blind spot indicator element |
US8058977B2 (en) | 2006-10-24 | 2011-11-15 | Donnelly Corporation | Exterior mirror having a display that can be viewed by a host driver or drivers of other vehicles |
US7944371B2 (en) | 2007-11-05 | 2011-05-17 | Magna Mirrors Of America, Inc. | Exterior mirror with indicator |
EP3624086A1 (en) | 2007-01-25 | 2020-03-18 | Magna Electronics Inc. | Radar sensing system for vehicle |
US7748856B2 (en) | 2007-05-23 | 2010-07-06 | Donnelly Corporation | Exterior mirror element with integral wide angle portion |
US8115984B2 (en) * | 2007-06-18 | 2012-02-14 | Ajjer Llc | Laminated electrochromic devices and processes for forming the same |
US8345345B2 (en) | 2007-06-27 | 2013-01-01 | Gentex Corporation | Electrochromic device having an improved fill port plug |
US7884995B2 (en) | 2007-06-27 | 2011-02-08 | Gentex Corporation | Electrochromic device having an improved fill port plug |
US8599467B2 (en) * | 2008-01-31 | 2013-12-03 | Ajjer, Llc | Environmentally safe electrochromic devices and assemblies |
US8988756B2 (en) * | 2008-01-31 | 2015-03-24 | Ajjer, Llc | Conductive busbars and sealants for chromogenic devices |
US8154418B2 (en) | 2008-03-31 | 2012-04-10 | Magna Mirrors Of America, Inc. | Interior rearview mirror system |
US7813023B2 (en) | 2008-06-09 | 2010-10-12 | Magna Mirrors Of America, Inc. | Electro-optic mirror |
DE102008031445B4 (en) * | 2008-07-04 | 2011-07-21 | Magna Donnelly Engineering GmbH, 63877 | Rear-view mirror with changeable reflectance |
US20100085653A1 (en) * | 2008-09-15 | 2010-04-08 | Magna Mirrors Of America, Inc. | Mirror assembly for vehicle |
US8491137B2 (en) | 2008-09-19 | 2013-07-23 | Magna Mirrors Of America, Inc. | Vehicle mirror assembly with wide angle element |
US9487144B2 (en) | 2008-10-16 | 2016-11-08 | Magna Mirrors Of America, Inc. | Interior mirror assembly with display |
US8482664B2 (en) | 2008-10-16 | 2013-07-09 | Magna Electronics Inc. | Compact camera and cable system for vehicular applications |
WO2010091347A1 (en) | 2009-02-06 | 2010-08-12 | Magna Electronics Inc. | Improvements to camera for vehicle |
US8542451B2 (en) | 2009-03-25 | 2013-09-24 | Magna Electronics Inc. | Vehicular camera and lens assembly |
US8503061B2 (en) | 2009-03-30 | 2013-08-06 | Magna Mirrors Of America, Inc. | Electro-optic rearview mirror assembly for vehicle |
US8673122B2 (en) * | 2009-04-07 | 2014-03-18 | Magna Mirrors Of America, Inc. | Hot tile sputtering system |
US11325533B2 (en) | 2009-04-23 | 2022-05-10 | Magna Mirrors Of America, Inc. | Frameless interior rearview mirror assembly |
ES2473969T3 (en) | 2009-04-23 | 2014-07-08 | Magna Mirrors Of America, Inc. | Vehicle mirror set |
US9346403B2 (en) | 2009-10-07 | 2016-05-24 | Magna Mirrors Of America, Inc. | Rearview mirror assembly |
CN102648113B (en) | 2009-10-07 | 2015-05-27 | 麦格纳镜片美国有限公司 | Frameless interior rearview mirror assembly |
US11498486B2 (en) | 2009-10-07 | 2022-11-15 | Magna Mirrors Of America, Inc. | Vehicular exterior rearview mirror assembly |
US10261648B2 (en) | 2009-10-07 | 2019-04-16 | Magna Mirrors Of America, Inc. | Exterior rearview mirror assembly |
US8851690B2 (en) | 2009-10-27 | 2014-10-07 | Magna Mirrors Of America, Inc. | Mounting assembly for vehicle interior mirror |
US9205780B2 (en) | 2010-02-04 | 2015-12-08 | Magna Mirrors Of America, Inc. | Electro-optic rearview mirror assembly for vehicle |
US8890955B2 (en) | 2010-02-10 | 2014-11-18 | Magna Mirrors Of America, Inc. | Adaptable wireless vehicle vision system based on wireless communication error |
US9481304B2 (en) | 2010-05-24 | 2016-11-01 | Magna Mirrors Of America, Inc. | Automotive exterior mirror heater control |
US9380219B2 (en) | 2011-04-20 | 2016-06-28 | Magna Electronics Inc. | Angular filter for vehicle mounted cameras |
US8988755B2 (en) | 2011-05-13 | 2015-03-24 | Magna Mirrors Of America, Inc. | Mirror reflective element |
US9871971B2 (en) | 2011-08-02 | 2018-01-16 | Magma Electronics Inc. | Vehicle vision system with light baffling system |
US9596387B2 (en) | 2011-08-02 | 2017-03-14 | Magna Electronics Inc. | Vehicular camera system |
US8736940B2 (en) | 2011-09-30 | 2014-05-27 | Magna Mirrors Of America, Inc. | Exterior mirror with integral spotter mirror and method of making same |
US8801245B2 (en) | 2011-11-14 | 2014-08-12 | Magna Mirrors Of America, Inc. | Illumination module for vehicle |
US9352691B2 (en) | 2012-11-05 | 2016-05-31 | Magna Mirrors Of America, Inc. | Interior rearview mirror assembly |
US9216691B2 (en) | 2013-02-25 | 2015-12-22 | Magna Mirrors Of America, Inc. | Exterior mirror with spotter mirror |
WO2014151083A1 (en) | 2013-03-15 | 2014-09-25 | Gentex Corporation | Fill port plugs for electrochromic devices |
US9174578B2 (en) | 2013-04-22 | 2015-11-03 | Magna Mirrors Of America, Inc. | Interior rearview mirror assembly |
US9669764B2 (en) | 2013-10-16 | 2017-06-06 | Magna Mirrors Of America, Inc. | Vehicular mirror reflective element with electrochromic film |
US9451138B2 (en) | 2013-11-07 | 2016-09-20 | Magna Electronics Inc. | Camera for vehicle vision system |
US9454054B2 (en) | 2013-11-18 | 2016-09-27 | Magna Mirrors Of America, Inc. | Electro-optic mirror element and process of making same |
US9749509B2 (en) | 2014-03-13 | 2017-08-29 | Magna Electronics Inc. | Camera with lens for vehicle vision system |
US11634078B2 (en) | 2014-05-15 | 2023-04-25 | Magna Mirrors Of America, Inc. | Vehicular rearview mirror control system |
US10967796B2 (en) | 2014-05-15 | 2021-04-06 | Magna Mirrors Of America, Inc. | Interior rearview mirror assembly with low profile mirror |
US9761144B2 (en) | 2014-09-11 | 2017-09-12 | Magna Mirrors Of America, Inc. | Exterior mirror with blind zone indicator |
US10466563B2 (en) | 2015-02-24 | 2019-11-05 | Magna Mirrors Of America, Inc. | Mirror assembly with spring-loaded electrical connectors |
US9878669B2 (en) | 2015-02-24 | 2018-01-30 | Magna Mirrors Of America, Inc. | Mirror assembly with spring-loaded electrical connectors |
US10543785B2 (en) | 2016-06-03 | 2020-01-28 | Magna Mirrors Of America, Inc. | Rearview mirror assembly with rounded front substrate |
WO2018175973A1 (en) | 2017-03-23 | 2018-09-27 | Arizona Board Of Regents On Behalf Of Arizona State University | Physical unclonable functions with copper-silicon oxide programmable metallization cells |
US10850667B2 (en) | 2017-05-04 | 2020-12-01 | Magna Mirrors Of America | Interior rearview mirror assembly |
US10538203B2 (en) | 2017-10-10 | 2020-01-21 | Magna Mirrors Of America, Inc. | Interior rearview mirror assembly with indicator |
US10855890B2 (en) | 2017-10-23 | 2020-12-01 | Magna Electronics Inc. | Camera for vehicle vision system with enhanced heat removal |
WO2019226423A1 (en) | 2018-05-24 | 2019-11-28 | Magna Mirrors Of America, Inc. | Exterior rearview mirror assembly |
US10899275B2 (en) | 2018-06-27 | 2021-01-26 | Magna Electronics Inc. | Vehicular camera with PCB focus tuning |
US10676041B2 (en) | 2018-07-06 | 2020-06-09 | Magna Electronics Inc. | Vehicular camera with pliable connection of PCBS |
US11292388B2 (en) | 2018-07-17 | 2022-04-05 | Magna Mirrors Of America, Inc. | Electro-optic drive system for vehicular mirror |
US11683911B2 (en) | 2018-10-26 | 2023-06-20 | Magna Electronics Inc. | Vehicular sensing device with cooling feature |
US11341671B2 (en) | 2018-11-01 | 2022-05-24 | Magna Electronics Inc. | Vehicular driver monitoring system |
US10911647B2 (en) | 2018-11-12 | 2021-02-02 | Magna Electronics Inc. | Vehicular camera with thermal compensating means |
US11453339B2 (en) | 2019-05-15 | 2022-09-27 | Magna Mirrors Of America, Inc. | Interior rearview mirror assembly with multifunction light pipe |
US11214199B2 (en) | 2019-06-03 | 2022-01-04 | Magna Mirrors Of America, Inc. | Interior rearview mirror assembly with display and tilt mechanism |
CN110441971A (en) * | 2019-07-08 | 2019-11-12 | 暨南大学 | One kind being superimposed full thin film solid state electrochromic device based on more piece |
US11244722B2 (en) | 2019-09-20 | 2022-02-08 | Arizona Board Of Regents On Behalf Of Arizona State University | Programmable interposers for electrically connecting integrated circuits |
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Family Cites Families (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US28199A (en) * | 1860-05-08 | Octave saulay | ||
US3280701A (en) * | 1961-09-05 | 1966-10-25 | Donnelly Mirrors Inc | Optically variable one-way mirror |
US3453038A (en) * | 1966-06-15 | 1969-07-01 | Du Pont | Compartmented electrochromic device |
US3578843A (en) * | 1968-09-25 | 1971-05-18 | American Cyanamid Co | Control of light reflected from a mirror |
US3601614A (en) * | 1970-05-25 | 1971-08-24 | Chrysler Corp | Automatic anti-glare rearview mirror system |
US3712710A (en) * | 1970-12-21 | 1973-01-23 | American Cyanamid Co | Solid state electrochromic mirror |
US3840286A (en) * | 1973-07-30 | 1974-10-08 | Optel Corp | Electrochromic device |
US3862798A (en) * | 1973-11-19 | 1975-01-28 | Charles L Hopkins | Automatic rear view mirror adjuster |
JPS52122586A (en) * | 1976-04-07 | 1977-10-14 | Kureha Chemical Ind Co Ltd | Novel fishing line |
GB1586104A (en) * | 1976-07-12 | 1981-03-18 | Matsushita Electric Ind Co Ltd | Electrochromic display apparatus and method |
JPS5310385A (en) * | 1976-07-15 | 1978-01-30 | Matsushita Electric Ind Co Ltd | Solid display body |
DE2737564C2 (en) * | 1976-09-02 | 1985-05-02 | Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka | Color display device with redox reaction products formed on an indicator electrode |
IT1082518B (en) * | 1977-01-25 | 1985-05-21 | Fiat Spa | LIQUID CRYSTAL MIRROR TO BE USED PARTICULARLY AS A REAR-VIEW MIRROR FOR VEHICLES |
IT1117275B (en) * | 1977-02-25 | 1986-02-17 | Remo Bedini | AUTOMATIC METHOD AND DEVICE FOR THE ATTENTION OF THE DRIVING PHENOMENA IN REFLECTED LIGHT |
JPS6031355B2 (en) * | 1979-06-26 | 1985-07-22 | 株式会社ニコン | All-solid-state electrochromic device |
DE3008768C2 (en) * | 1980-03-07 | 1985-04-04 | Schott Glaswerke, 6500 Mainz | Electrochromic mirror |
JPS578524A (en) * | 1980-06-19 | 1982-01-16 | Nippon Kogaku Kk <Nikon> | Electrochromic display element |
US4348078A (en) * | 1980-07-30 | 1982-09-07 | Bell Telephone Laboratories, Incorporated | Enhancement of optical absorption and contrast of electrochromic devices |
JPS5778519A (en) * | 1980-11-05 | 1982-05-17 | Citizen Watch Co Ltd | Production of electrochromic display element |
US4482216A (en) * | 1980-11-11 | 1984-11-13 | Citizen Watch Co., Ltd. | Solid state complementary electrochromic display devices |
JPS57172269A (en) * | 1981-04-17 | 1982-10-23 | Omron Tateisi Electronics Co | Limited reflection type photoelectric detector |
JPS57211122A (en) * | 1981-06-23 | 1982-12-24 | Citizen Watch Co Ltd | All solid-state complementary type electrochromic display element |
JPS5844422A (en) * | 1981-09-11 | 1983-03-15 | Toppan Printing Co Ltd | Electrochromic display element |
JPS5848028A (en) * | 1981-09-18 | 1983-03-19 | Nippon Kogaku Kk <Nikon> | Electrochromic display cell |
DE3142906A1 (en) * | 1981-10-29 | 1983-05-11 | Fa. Carl Zeiss, 7920 Heidenheim | STAGE CHARGE CONTROL FOR ELECTROCHROME LAYERS |
JPS58114019A (en) * | 1981-12-28 | 1983-07-07 | Citizen Watch Co Ltd | Solid-state complementary type electrochromic display element |
JPS58114020A (en) * | 1981-12-28 | 1983-07-07 | Citizen Watch Co Ltd | Driving system for all solid-state complementary type electrochromic display element |
JPS58114021A (en) * | 1981-12-28 | 1983-07-07 | Citizen Watch Co Ltd | All solid-state complementary type electrochromic display element |
JPS58126246U (en) * | 1982-02-19 | 1983-08-27 | 株式会社東海理化電機製作所 | Anti-glare mirror tilting device |
JPS58184129A (en) * | 1982-04-07 | 1983-10-27 | Hikoyasu Sugimoto | Light shielding device |
US4491390A (en) * | 1982-05-06 | 1985-01-01 | Tong Shen Hsieh | Automatic liquid-crystal light shutter |
JPS5961820A (en) * | 1982-09-30 | 1984-04-09 | Canon Inc | Fully solid-state type electrochromic element |
JPS5961821A (en) * | 1982-09-30 | 1984-04-09 | Canon Inc | Fully solid-state type electrochromic element |
JPS59119331A (en) * | 1982-12-25 | 1984-07-10 | Canon Inc | Electrochromic element |
US4652090A (en) * | 1984-04-20 | 1987-03-24 | Nippon Kogaku K. K. | Dispersed iridium based complementary electrochromic device |
JPS6150120A (en) * | 1984-08-18 | 1986-03-12 | Nippon Kogaku Kk <Nikon> | Production of dazzle preventing mirror |
JPH113421A (en) * | 1997-06-11 | 1999-01-06 | Meidensha Corp | Method for detecting line segment |
-
1986
- 1986-04-02 US US06/847,192 patent/US4712879A/en not_active Expired - Fee Related
-
1987
- 1987-03-27 CA CA000533125A patent/CA1263466A/en not_active Expired
- 1987-03-30 AU AU70748/87A patent/AU586547B2/en not_active Ceased
- 1987-04-01 JP JP62080876A patent/JPS6323135A/en active Pending
- 1987-04-02 DE DE8787302871T patent/DE3784536T2/en not_active Expired - Fee Related
- 1987-04-02 EP EP87302871A patent/EP0241217B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5757537A (en) * | 1991-09-04 | 1998-05-26 | Sun Active Glass Electrochromics, Inc. | Electrochromic devices and methods |
Also Published As
Publication number | Publication date |
---|---|
US4712879A (en) | 1987-12-15 |
EP0241217A1 (en) | 1987-10-14 |
EP0241217B1 (en) | 1993-03-10 |
DE3784536T2 (en) | 1993-06-24 |
JPS6323135A (en) | 1988-01-30 |
DE3784536D1 (en) | 1993-04-15 |
AU7074887A (en) | 1987-10-08 |
AU586547B2 (en) | 1989-07-13 |
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