CN103081132A - LED device having tilted peak emission and LED display including such devices - Google Patents
LED device having tilted peak emission and LED display including such devices Download PDFInfo
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- CN103081132A CN103081132A CN2011800003678A CN201180000367A CN103081132A CN 103081132 A CN103081132 A CN 103081132A CN 2011800003678 A CN2011800003678 A CN 2011800003678A CN 201180000367 A CN201180000367 A CN 201180000367A CN 103081132 A CN103081132 A CN 103081132A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/483—Containers
Abstract
An LED package and a lead frame include a reflector cup having a bottom surface with an LED asymmetrically positioned on the bottom surface and a wall surface inclined relative to the bottom surface and defining an opening at an upper end thereof. The bottom surface of the reflector cup has a first axial dimension along a first axis and second axial dimension along a second axis, orthogonal to the first axis. A display having an asymmetrical FFP and asymmetrical screen curve includes an array of the LED modules including a plurality of LED packages. At least some of the LED packages include a dome-shaped lens asymmetrically positioned with respect to a geometric center of the bottom surface of the reflector cup.
Description
Technical field
The disclosure relates generally to light-emitting diode (LED), and more specifically, relates to have the inclination peak emission LED device of (peak emission), and relates to the light-emitting diode display that comprises such devices.
Background technology
Therefore in recent years, marked improvement has occured in the LED technology, has the brightness of enhancing and the LED of color fidelity is adopted.Because these improved LED and improved image processing techniques, large scale, all-colour LED video screen can obtain and obtain now generally to use.The large scale light-emitting diode display typically comprises the combination of independent LED panel, and the image resolution ratio that is determined by the distance between the neighbor or " pel spacing (pixel pitch) " is provided.
Outdoor display, its purpose are to watch from farther distance, have relatively large pel spacing and generally comprise discrete led array.In discrete led array, one group of redness, green and blue led of installing separately is actuated to form the full color pixel that is shown to the observer.LED-based large-screen display (being commonly called huge screen), is becoming more common such as in competitive sports, horse-racing ground, concert and large-scale public area (such as the Times Square in city, New York) at a lot of indoor and outdoor locations.A lot of these displays or screen can be greatly to 60 feet high and 60 feet wide.These screens can comprise thousands of " pixels " or " picture element module ", and wherein each can comprise a plurality of LED.Picture element module adopts the LED of efficient and high brightness so that display can be from relatively far away local viewed, even when being subject to solar irradiation by day.Picture element module can have few to three or four LED (redness, a green and a blueness), and they allow pixel by the light of the multiple different colours of combined transmit of redness, green and/or blue light.In the huge screen of maximum, each picture element module can have many LED.Picture element module is disposed in the rectangular grid.For example, a grid can be that 640 modules are wide and 480 modules are high, and the final size of screen depends on the actual size of picture element module.
Traditional LED-based display is by computer system control, computer system receives input signal (for example TV signal) and forms the whole image that shows based on the particular color that needs in the picture element module place, and computer system determines which LED in each picture element module is luminous and how brightly have.Also may comprise electric power system, it can be conditioned so that it is luminous with required brightness to the electric power that each picture element module provides electric power and supplies with each LED.Provide conductor to apply suitable electric power signal each LED to the picture element module.
The overwhelming majority in these huge screens typically is installed in observer's the above At The Height of eye-level display, on the top such as the side of building or the grandstand in the sports ground.Therefore, can the observed person do not see and be wasted by the major part of the light of display emission.In addition, the light of wasting can cause light pollution owing to having produced unwanted light reflection and/or dazzle.A kind of mode that reduces the amount of the light that is wasted is by display being installed at an angle to mate better observer's sight line, but this needs complicated and expensive installation hardware, it is difficult to use, especially for the very large display that is installed in high At The Height.
Summary of the invention
A purpose of the present disclosure provides a kind of improved LED device, and it has improved the efficient of the light of being launched by the large LED display.Disclosed LED device and light-emitting diode display can also be saved the energy and reduce light pollution.
An execution mode of LED packaging part (package) comprises the reflector with bottom surface and wall (wall surface, wall surface), and wall is with respect to inclined bottom surface and locate in the top to limit opening.LED is installed on the bottom surface.The bottom surface of reflector have along the first axial dimension of about 0.91mm to 1.1mm of first axle and along perpendicular to about 0.66mm of the second axis of first axle to about the second axial dimension of 0.91mm.
Another execution mode discloses a kind of display, and it includes lead frame (lead frame), and lead frame comprises the reflector with bottom surface and wall, and wall is with respect to inclined bottom surface and locate in the top to limit opening.The bottom surface have along about 0.91mm of first axle to about 1.1mm the first axial dimension and along being the second axial dimension of about 72% to about 100% of the first axial dimension perpendicular to the second axis of first axle.
Another execution mode discloses a kind of display, and it comprises that carrying is with the substrate of the array of light-emitting diode (LED) packaging part of vertical row and horizontal line layout.In the LED packaging part at least one has lead frame, and this lead frame has reflector.Reflector has bottom surface and wall, and wall is with respect to inclined bottom surface and locate in the top to limit opening.There is LED to be installed on the bottom surface.The bottom surface have along about 0.91mm of first axle to about 1.1mm the first axial dimension and along perpendicular to about 0.66mm of the second axis of first axle to about the second axial dimension of 0.91mm.This display further comprises signal processing and led drive circuit, and its array energising that is electrically connected optionally to make the LED packaging part is in order to produce visual picture at display.
Further execution mode discloses a kind of LED packaging part, and it comprises the reflector with bottom surface and wall, and wall is with respect to inclined bottom surface and locate in the top to limit opening.LED is installed on the bottom surface.The bottom surface has along the first axial dimension of first axle with along the second axial dimension perpendicular to the second axis of first axle.The bottom surface has crooked boundary member (curved border portion) and straight boundary member.The length of sweep is much larger than half of bottom surface girth.
Another execution mode discloses a kind of LED packaging part, and it comprises the reflector with bottom surface and wall, and wall is with respect to inclined bottom surface and locate in the top to limit opening.LED is installed on the bottom surface.The bottom surface of oval reflector have less than the first axial dimension of about 0.89mm and along perpendicular to the second axis of first axle less than about the second axial dimension of 0.64mm.
Description of drawings
Fig. 1 is the vertical view according to the LED device of an execution mode of the present disclosure;
Fig. 2 is the viewgraph of cross-section of the execution mode shown in Fig. 1, intercepts along hatching 2-2;
Fig. 3 is the viewgraph of cross-section of the execution mode among Fig. 1, intercepts along observation line 3-3;
Fig. 4 is the vertical view according to the LED device of another execution mode of the present disclosure;
Fig. 5 is the diagram of cutaway view that covers the local excision of lensed LED, intercepts along observation line 5-5;
Fig. 6 is the first side sectional view that covers the lens of LED device;
Fig. 7 is the cutaway view of the lens among Fig. 6;
Fig. 8 is the second end view that covers the lens of LED device among Fig. 6;
Fig. 9 is the vertical view of the lens among Fig. 6;
Figure 10 is the plane graph that comprises according to the part of the LED display of the LED device of execution mode of the present disclosure;
Figure 11 is the LED display diagram relevant with the observer of Figure 10;
Figure 12 (a) is the plot according to the horizontal far field pattern of the LED device of an execution mode of the present disclosure (far field pattern).
Figure 12 (b) is the plot according to the relative first negative visual angle of horizontal far field pattern of the LED device of an execution mode of the present disclosure;
Figure 12 (c) is the plot according to the relative second negative visual angle of horizontal far field pattern of the LED device of an execution mode of the present disclosure;
Figure 12 (d) is the plot according to the vertical far field pattern of the LED device of an execution mode of the present disclosure;
Figure 13 (a) is the plot according to the horizontal screen curve (screen curve) of the LED screen of an execution mode;
Figure 13 (b) is the plot according to the relative first negative visual angle of horizontal screen curve of the LED device of an execution mode of the present disclosure;
Figure 13 (c) is the plot according to the relative second negative visual angle of horizontal screen curve of the LED device of an execution mode of the present disclosure;
Figure 13 (d) is the plot according to the vertical screen curve of the LED device of an execution mode of the present disclosure.
Embodiment
Following describing presentation preferred implementation of the present disclosure, show imagination and be used for realizing optimum way of the present disclosure.This description is not for the restriction purpose, and only as the purpose of describing General Principle of the present disclosure, the scope of the present disclosure is defined by the following claims.
Now will with reference to accompanying drawing embodiments of the present invention be described more fully hereinafter, shown in the drawings of embodiments of the present invention.Yet, the execution mode that the present invention can implement and can not be interpreted as being defined in herein and set forth with multiple different form.In fact, provide these execution modes so that this openly will be detailed and complete, and scope of the present invention is expressed fully to those skilled in the art.Same label is the element of TYP all the time.
Should be understood that, although term first, second etc. can be used to describe various elements at this, these elements should not limited by these terms.These terms only are used for an element and another are distinguished.For example, the first element can be called as the second element, and similarly, the second element can be called as the first element, and does not deviate from scope of the present invention.As what adopt at this, term " and/or (and/or) " comprises making up arbitrarily and all of one or more relevant Listed Items.
Should be understood that, when an element (such as floor, district or substrate) was called as at another element " upper (on) " or extends " extremely ... upper (onto) " another element, it can be located immediately at or directly extend on another element or can also have intermediary element.On the contrary, when an element is called as " being located immediately at (directly on) " or extends " directly extremely ... upper (directly onto) " another element, there is not intermediary element here.It is to be further understood that it can be connected directly or be engaged to another element or have intermediary element when an element is called as " connection (connected) " or " engaging (coupled) " to another element.On the contrary, when an element is called as " directly connection (directly connected) " or " directly engaging (directly coupled) " to another element, there is not intermediary element here.
Relational language can be used to an element shown in the description figure, floor or district with respect to the relation in another element, floor or district such as " following (below) " or " above (above) " or " upper (upper) " or " lower (lower) " or " level (horizontal) " or " vertically (vertical) " at this.Should be understood that, these term purposes are to comprise the different directions the direction of describing of this device in figure.
Only as the purpose of describing specific implementations, and purpose does not lie in the present invention is limited at this term that adopts.As what adopt at this, singulative " (a) ", " one (an) " and " being somebody's turn to do (the) " same purpose are to comprise plural form, unless explicitly point out in addition in the literary composition.Should further be understood that, term " comprises (comprises) " when adopting at this, when " comprising (comprising) ", " comprising (includes) " and/or " comprising (including) ", refer in particular to the existence of the feature stated, overall, step, operation, element and/or parts, but do not get rid of existence or the increase of one or more features, overall, step, operation, element, parts and/or its cohort.
Unless otherwise defined, has the therewith identical meaning of common understanding of the those of ordinary skill of field that the present invention belongs at these all terms that adopt (comprising technology and scientific terminology).Should further be understood that, should be interpreted as having the consistent meaning of the meaning in the content in the therewith specification and correlative technology field at this term that adopts, and can not be interpreted as idealized or too formal meaning, unless in this clear and definite so definition.
Fig. 1-Fig. 3 has described an execution mode of LED packaging part 10 with different views.Fig. 1 is the vertical view of LED packaging part 10, shows the reflector 20 with bottom surface 22 and wall 23, and wall tilts with respect to bottom surface 22, and limits an opening 24 at the upper end of reflector 20.LED30 is installed on the bottom surface 22.Bottom surface 22 has along the first axial dimension 26 of first axle 40 with along the second axial dimension 28 perpendicular to the second axis 50 of first axle 40.In some embodiments, preferably, the first axial dimension 26 is extremely approximately 1.1mm of about 0.91mm, and the second axial dimension 28 is that about 0.66mm is to about 0.91mm.More preferably, the first axial dimension 26 is extremely approximately 1.05mm of about 0.95mm, and the second axial dimension 28 is that about 0.75mm is to about 0.85mm.
According to the disclosure, the size of imagination reflector 20 is manufactured with minimum dimensional tolerance.These closed tolerances only are subject to being used to form the manufacturing capacity of Sheet Metal Forming Technology of reflector and the restriction of lead frame assembling process, and are defined to the minimum finite size of LED30.Correspondingly in other embodiments, the first axial dimension 26 is less than about 0.89mm, and the second axial dimension 28 is less than about 0.64mm.Further, the first axial dimension 26 can be less than approximately 0.85mm and the second axial dimension 28 less than about 0.6mm.Further, the size of the length of the first axial dimension 26 and the second axial dimension 28 and LED30 approximately identical and have the size that slightly increases with the electric connection that allows LED30 and with performance of devices feature disclosed herein consistent light propagate.
In one embodiment, the area of bottom surface 22 is greater than the area of the bottom surface of LED30 and less than the area of opening 24.In other embodiments, the ratio of the first axial dimension 26 and the second axial dimension 28 can be from about 1: 1 to about 11: 7 scope.For example, the ratio of the first axial dimension 26 and the second axial dimension 28 can be about 5: 4.Preferably, in some embodiments, the second axial dimension 28 is about 72% to about 100% of the first axial dimension 26.More preferably, the second axial dimension 28 is about 75% to 90% of the first axial dimension 26.Most preferably, the second axial dimension 28 is about 78% to 85% of the first axial dimension 26.
With in manufacturing tolerance and the imagination of the size characteristic that limits of the finite size of LED30 consistent, it is relevant with the size of bottom surface 22 that the size of opening 24 will keep, so that the light propagation is consistent with performance of devices feature disclosed herein.Correspondingly, in other embodiments, the first axial dimension 32 less than approximately 1.25mm and the second axial dimension 34 less than about 1.00mm.Further, the first axial dimension 32 can be less than about 1.2mm, and the second axial dimension 34 is less than about 0.95mm.
In the execution mode disclosed herein, first size will be longer than the second size so that be wider than along the visual angle of the second axis 50 along the visual angle of first axle 40.For example, the first axial dimension 26 to the second axial dimensions 28 are grown up approximately 0.2mm to about 0.4mm.For example, LED30 can have along about-60 ° to+60 ° the horizontal view angle of first axle 40.As applied at this, term " visual angle (view angle) " be in far field pattern (FFP) by the light intensity of LED emission be peak strength about 50% the time angular range.FFP is the optical signature of LED and represents luminous intensity in the space.The most at large, FFP has shown the standardized luminous intensity ratio at different angle of radiation places.In this execution mode, LED packaging part 10 is modified to produce asymmetric FFP and produce uniform FFP in second direction at first direction.The design of the supplementary features of asymmetric localization LED and reflector is disclosed in the common unsettled U.S. Patent Application Serial Number 12/498,277 of applicant and common unsettled U.S. Patent Application Serial Number 12/868,567, and its disclosure is incorporated into this by quoting as proof.
LED30 when being arranged in the geometric center of bottom surface, can have along about-28 ° to+28 ° the vertical visual angle of the second axis 50.When LED30 is become geometric center place away from bottom surface 22 by dislocation (displaced), geometric center is the intersection point between first axle 40 and the second axis 50 in Fig. 1, and LED30 can have approximately-40 ° to+10 ° vertical visual angle and peak strength and be positioned at approximately-20 and ° to locate.In the case, the visual angle is with approximately-20 ° inclination.As adopting at this, " geometric center (the geometrical center) " on term surface be defined as plane pattern the centre of form or, in other words, plane pattern is divided into the crosspoint of the two-part straight line of identical square.In the environment of disclosed device, in some embodiments, plane pattern is the opening of reflector herein.
In some embodiments, the geometric center of bottom surface 22 can overlap with the intersection point of first axle 40 and the second axis 50 or be overlapping to produce relative little oblique viewing angle.Yet the geometric center of bottom surface 22 also can be become intersection point away from first axle 40 and the second axis 50 to obtain relative large oblique viewing angle by dislocation.Similarly, in some embodiments, the geometric center of opening 24 can overlap with the intersection point of first axle 40 and the second axis 50 or be overlapping, causes relatively little oblique viewing angle.Further, in some embodiments, the geometric center of opening 24 can by the intersection point of dislocation one-tenth away from first axle 40 and the second axis 50, cause relatively large oblique viewing angle.
Fig. 2 is the viewgraph of cross-section of the execution mode among Fig. 1, intercepts along hatching 2-2.LED30 is installed on the bottom surface 22 in the reflector 20.In shown execution mode, reflector 20 has the preferably approximately degree of depth of the extremely about 0.3mm of 0.2mm, so wall 23 has about 0.2mm to the height " h " of about 0.3mm.In some embodiments, highly " h " can be less than about 0.2mm.In other embodiments, highly " h " can be less than about 0.15mm.Further, height h can be in extremely about 0.24mm scope from about 0.16mm.Consistent with the imagination of the minimum size feature of reflector 20, highly " h " can be only greatly to the profile height that can hold LED30 (profile height, section height).In some embodiments, highly " h " can in addition less than the profile height of LED30.Vertical axis 60 extends through the center of reflector 20.
Fig. 3 shows the viewgraph of cross-section of the LED packaging part 10 of Fig. 1, intercepts along hatching 3-3.As in Fig. 3 as seen, LED30 is from vertical axis 60 skew.With reference to Fig. 1-Fig. 3, LED packaging part 10 has the reflector 20 that comprises bottom surface 22 and wall 23, and wall tilts with respect to bottom surface 22.Reflector 20 can have ellipse or general circular.The gradient of wall 23 relative bottom surfaces 22 changes continuously, so that wall 23 has relatively part 48 and the relative part 46 of delaying (shallow) of steep (steep).In Fig. 3, relatively steep part 48 can be near the bottom of reflector 20, and relatively slow part 46 can be near the top of reflector 20.For example, wall 23 limit steep part 48 with from the first angle 54 between the 22 outward extending planes 52, bottom surface, and the part 46 of delaying and the second angle 56 between the plane 52.Preferably, angle 56 relative bottom surfaces 22 tilt with about 40 ° to about 50 ° and angle 54 relative bottom surfaces 22 with about 50 ° of extremely about 85 ° of inclinations.More preferably, the first angle 54 can be about 75 ° to about 85 °, and the second angle can be about 42 ° to about 48 °.Further, the first angle 54 can be greater than the second angle 56, so that for example, more light reflects towards low visual angle from the top of reflector 22.
Fig. 4 is the vertical view according to the LED device of another execution mode of the present disclosure, and Fig. 5 shows the viewgraph of cross-section of the execution mode among Fig. 4, intercepts along hatching 5-5.Similar with the front execution mode, relative vertical axis 60 skews of LED30.Such as Fig. 4 and seen in fig. 5, bottom surface 22 its downside have straight boundary member and thereon side have crooked boundary member.Crooked boundary member is longer than straight boundary member.The boundary member of the bending of bottom surface 22 has the length greater than half of the girth of bottom surface 22.Similarly, opening 24 has straight boundary member and has crooked boundary member at upside at downside.Preferably, the boundary member of the bending of opening 24 has the length greater than half of the girth of bottom surface 24.Correspondingly, compare with first execution mode among Fig. 1-Fig. 3 can be slightly small for the angle among Fig. 5 54.For example, preferably approximately 50 ° to about 75 ° of angles 54, more preferably, about 55 ° to about 65 °, and most preferably, about 57 ° to about 63 °.
Fig. 6 shows the different views that the reflector 20 that covered by lens 62 and Fig. 7-Fig. 9 show lens 62.Lens 62 preferably have the domed shape (dome-shape) with respect to the geometric center asymmetric localization of bottom surface 22.Lens 62 can have the preferably approximately profile height of the extremely about 7.3mm of 5.3mm, and more preferably, about 5.8mm is 6.8mm extremely approximately, and most preferably, the extremely about 6.6mm of about 6.0mm.In two vertical axis 64 shown in Fig. 6 and Fig. 7 and 65.Axis 64 aligns vertically with the geometric center 66 of lens, and axis 65 aligns vertically with the lens cross-section center 64 that intercepts near the hatching 9-9 of Fig. 7 in lens 62 bottoms.Lens 62 have the rounded upper surface 68 of the vertical wall 69 of join dependency.Upper surface 68 has the geometric center 66 at the intersection point place that is positioned at axis 64 and upper surface 68.Distance 76 between axis 64 and the axis 65 is that about 0.2mm is to about 0.4mm.For example, geometric center 66 can be become away from lens along the extremely about 0.4mm of the about 0.2mm of geometric center in the bottom transverse cross section of hatching 9-9, shown in Fig. 7 and Fig. 9 by dislocation.Preferably, distance 76 is extremely approximately 0.35mm of about 0.25mm, and more preferably, about 0.27mm is 0.33mm extremely approximately.Correspondingly, the profile of lens 62 is crooked a little and as seen in Figure 9 in one direction, and lens 62 have circular (oblong) cross-sectional profiles of approximate square, and it has a smooth a little side and a relative round side.
Figure 10 is the plane graph of the part of LED display 100, for example, comprises the outdoor display screen of the driver PCB102 that carries in a large number the substrate 104 of arranging with row and column.Display screen 100 is divided into a plurality of pixels 110, and each pixel comprises the substrate 104 that has red at least, blue and green LED 106 on it.Each pixel of display can have about 10mm and multiply by about 10mm or larger size.Further, each substrate 104 can be driven by different voltage levels.Substrate 104 comprises at least some LED106 with design feature described above.Substrate 104 is electrically connected to metallic circuit or the pad (not shown) on the PCB102, and metallic circuit or pad connect LED to suitable Electric signal processing and drive circuit (not shown).Between pixel 110, can there be hole 108, be used for PCB102 is anchored into mounting platform.
Be energy savings and minimizing light pollution, display comprises at least one substrate with LED device 106 104, and this LED device has above disclosed reflector.Figure 11 shows light-emitting diode display 100, has observer 140 to be positioned at the viewing location of floor projection line below 120.120 representatives of floor projection line are substantially perpendicular to the line of watching face of display 100.Sight line 130 and the angle θ between the floor projection line 120 are defined as the visual angle of relative display 100.Further, because observer 140 is positioned at horizontal line below 120, view angle theta is negative value.
Figure 12 (a-c) shows respectively at about 0 °, approximately-18 ° and the about horizontal FFP of LED106 under-36 ° the visual angle.Figure 12 (d) shows the vertical FFP of LED106.In each figure of Figure 12 (a-d), two curves have been described the LED of emission different colours.For example, curve 152,156,160 and 172 has been described the LED of red-emitting, and curve 154,158,162 and 174 has been described the LED of transmitting green light.As visible among Figure 12 (a-d), curve 152,156,160 and 172 is match curve 154,158,162 and 174 respectively.Correspondingly, the LED that makes up according to the disclosure launches the light of different colours, and has closely similar FFP under different visual angles.In some embodiments, disclosed LED packaging part has the FFP peak value of about 3000mcd at place, visual angle approximately-18 °.Corresponding operating current is less than about 20mA.In some embodiments, operating current can be less than about 10mA.For example, luminous for the peak value of launching about 1253mcd, disclosed LED packaging part has the operating current of about 8.4mA.Therefore, by adopting disclosed LED packaging part can save about 32% electric power.
Screen curve is an optical signature of display screen, and it has shown standardized luminous intensity ratio under different angle of radiation.Those skilled in the art recognizes, if the different colours screen curve close match that produces for light-emitting diode display then has advantage.Figure 13 (a-c) shows respectively light-emitting diode display 100 at about 0 °, approximately-18 ° and the about horizontal screen curve under-36 ° the visual angle.Figure 13 (d) shows the vertical screen curve of light-emitting diode display 100.In each figure of Figure 13 (a-d), two curve descriptions the emission different colours LED.Screen curve when for example, curve 176,180,184 and 188 has been described all pixel red-emittings of light-emitting diode display 100.Screen curve when accordingly, curve 178,182,186 and 190 has been described all pixel transmitting green lights when light-emitting diode display 100.Because curve 176,180,184 and 188 is match curve 178,182,186 and 190 respectively, light-emitting diode display 100 is expected to present closely similar screen curve when the emission different colours.
Further, light-emitting diode display 100 has the relatively wide horizontal view angle centered by about 0 °.Accordingly, light-emitting diode display 100 has by approximately-8 ° to the about relatively narrow vertical visual angle centered by-28 °.More preferably, light-emitting diode display 100 has by approximately-13 ° to the about relatively narrow vertical visual angle centered by-23 °, and most preferably, the relatively narrow vertical visual angle centered by approximately-18 °.
From the foregoing, can find out that these execution modes provide a kind of LED packaging part, it comprises the reflector with bottom surface and wall, the relative inclined bottom surface of wall and locate in the top to limit opening.LED is installed on the bottom surface and can be covered at least in part by asymmetric lens.Therefore the light of disclosed LED packaging part emission tilt and be directed to observer's eyes from here, this observer be positioned at the light-emitting diode display that comprises the LED packaging part of arranging according to the disclosure below.The amount of the light of wasting in comprising the huge display screen of disclosed LED packaging part further, reduces.
Therefore, the detailed description of front is intended to be regarded as exemplary and non-limiting, and should be understood that, following claim (comprising all equivalents) is intended to limit spirit and scope of the present disclosure.
Claims (45)
1. a light-emitting diode (LED) packaging part comprises:
Reflector has bottom surface and wall, and described wall is with respect to described inclined bottom surface and locate in the top to limit opening; With
LED is installed on the described bottom surface,
Wherein, described bottom surface have along about 0.91mm of first axle to about 1.1mm the first axial dimension and along perpendicular to about 0.66mm of the second axis of described first axle to about the second axial dimension of 0.91mm.
2. LED packaging part according to claim 2, wherein, described the first axial dimension is than described the second axial dimension approximately 0.2mm to 0.4mm that grows up.
3. LED packaging part according to claim 1, wherein, the area of described bottom surface is greater than the area of the bottom surface of described LED and less than the area of described opening.
4. LED packaging part according to claim 1, wherein, described the first axial dimension is about 0.95mm to about 1.05mm.
5. LED packaging part according to claim 1, wherein, described the second axial dimension is about 0.75mm to about 0.85mm.
6. LED packaging part according to claim 1, wherein, described wall has about 0.2mm to the about height of 0.3mm.
7. LED packaging part according to claim 1, wherein, described LED is become intersection point away from first axle and the second axis by dislocation.
8. LED packaging part according to claim 1, wherein, the intersection point of described first axle and the second axis is located asymmetrically with respect to the geometric center of described bottom surface.
9. LED packaging part according to claim 1, wherein, the intersection point of described first axle and the second axis overlaps with the geometric center of described bottom surface.
10. LED packaging part according to claim 1, wherein, the geometric center of described opening is become intersection point away from described first axle and the second axis by dislocation.
11. LED packaging part according to claim 1, wherein, the geometric center of described opening overlaps with the intersection point of described first axle and the second axis.
12. LED packaging part according to claim 1, wherein, the wall that extends away from described wall has inhomogeneous thickness.
13. LED packaging part according to claim 12, wherein, described wall changes so that described wall has the gentle part of steep part continuously with respect to the gradient of described bottom surface.
14. LED packaging part according to claim 13, wherein, described slow part with about 40 ° to about 50 ° angles with respect to described inclined bottom surface, and described steep part with about 50 ° to about 85 ° angles with respect to described inclined bottom surface.
15. LED packaging part according to claim 2, wherein, described the first axial dimension is about 5: 4 with the ratio of described the second axial dimension.
16. LED packaging part according to claim 1 further comprises dome lens, described dome lens is located asymmetrically with respect to the geometric center of described bottom surface and it covers described reflector.
17. LED packaging part according to claim 16, wherein, described lens have asymmetric cross section, described cross section have about 3.5mm to the first size of about 4.5mm and perpendicular to about 2.5mm of described first size to about the second size of 3.5mm.
18. LED packaging part according to claim 17, wherein, described lens have about 5.3mm to the profile height of about 7.3mm.
19. LED packaging part according to claim 16, wherein, described lens have rounded upper surface, and described upper surface has one and become away from the geometric center about the about 0.2mm to 0.4mm of geometric center of the end cross section of described lens by dislocation.
20. LED packaging part according to claim 16, wherein, the LED packaging part produces the peak value luminous intensity of about 3000mcd and has less than the about operating current of 20mA.
21. a display comprises:
Substrate, carrying is with the array of light-emitting diode (LED) packaging part of vertical row and horizontal line layout;
At least one comprises the described LED packaging part of lead frame, and described lead frame has reflector, and described reflector has bottom surface and wall, and described wall is with respect to described inclined bottom surface and locate in the top to limit opening;
LED is installed on the described bottom surface, wherein, described bottom surface have along about 0.91mm of first axle to about 1.1mm the first axial dimension and along perpendicular to about 0.66mm of the second axis of described first axle to about the second axial dimension of 0.91mm; And
Signal is processed and led drive circuit, is electrically connected optionally to make the array energising of LED packaging part in order to produce visual picture at described display.
22. display according to claim 21, wherein, the area of described bottom surface is greater than the area of the bottom surface of described LED and less than the area of described opening.
23. display according to claim 22, wherein, the ratio of described the first axial dimension and described the second axial dimension from about 1: 1 in about 11: 7 scope.
24. display according to claim 21, wherein, described the first axial dimension is grown up approximately 0.2mm to about 0.4mm than described the second axial dimension.
25. display according to claim 24, wherein, described display has asymmetric far field pattern, wherein has the peak value luminous intensity below the horizontal center line axis of described display.
26. display according to claim 21, wherein, described LED is installed into the intersection point away from described first axle and the second axis.
27. display according to claim 26, wherein, described bottom surface is asymmetric about described first axle.
28. display according to claim 27, wherein, described bottom surface is symmetrical about described the second axis.
29. display according to claim 21, wherein, described the first axial dimension is that about 0.95mm is to about 1.05mm.
30. display according to claim 21, wherein, described the second axial dimension is that about 0.75mm is to about 0.85mm.
31. a lead frame comprises:
Reflector has bottom surface and wall, and described wall is with respect to described inclined bottom surface and locate in the top to limit opening,
Wherein, described bottom surface have along about 0.91mm of first axle to about 1.1mm the first axial dimension and along about 72% to about 100% the second axial dimension for described the first axial dimension perpendicular to the second axis of described first axle.
32. lead frame according to claim 31, wherein, described first size is that about 0.95mm is to about 1.05mm.
33. lead frame according to claim 31, wherein, described second is of a size of about 0.75mm to about 0.85mm.
34. lead frame according to claim 31, wherein, described reflector has about 0.2mm to the degree of depth of about 0.3mm.
35. lead frame according to claim 31, wherein, the wall that extends from described wall has inhomogeneous thickness.
36. lead frame according to claim 31, wherein, described bottom surface has crooked boundary member and straight boundary member.
37. lead frame according to claim 36, wherein, the boundary member of described bending is longer than described straight boundary member.
38. lead frame according to claim 36, wherein, the second axial dimension is about 80% of described the first axial dimension.
39. a light-emitting diode (LED) packaging part comprises:
Reflector has bottom surface and wall, and described wall is with respect to described inclined bottom surface and locate in the top to limit opening; With
LED is installed on the described bottom surface,
Wherein, described bottom surface has along the first axial dimension of first axle with along the second axial dimension perpendicular to the second axis of described first axle, described bottom surface has crooked boundary member and straight boundary member, and the part of described bending has the length greater than half of the girth of described bottom surface.
40. described LED packaging part according to claim 39, wherein, described straight part has the length less than described the first axial dimension.
41. a light-emitting diode (LED) packaging part comprises:
Reflector has bottom surface and wall, and described wall is with respect to described inclined bottom surface and locate in the top to limit opening; With
LED is installed on the described bottom surface,
Wherein, described bottom surface have less than the first axial dimension of about 0.89 and along perpendicular to the second axis of described first axle less than about the second axial dimension of 0.64mm.
42. described LED packaging part according to claim 41, wherein, described wall has less than the about height of 0.25mm.
43. described LED packaging part according to claim 42, wherein, described height is less than about 0.2mm.
44. described LED packaging part according to claim 42, wherein, described height is less than about 0.15mm.
45. described LED packaging part according to claim 42, wherein, described height is about 0.16mm to about 0.24mm.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/000604 WO2012135976A1 (en) | 2011-04-07 | 2011-04-07 | Led device having tilted peak emission and led display including such devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103081132A true CN103081132A (en) | 2013-05-01 |
| CN103081132B CN103081132B (en) | 2017-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180000367.8A Active CN103081132B (en) | 2011-04-07 | 2011-04-07 | Light-emitting diode display with the LED component for tilting peak emission and comprising such devices |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103081132B (en) |
| WO (1) | WO2012135976A1 (en) |
Cited By (2)
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| WO2023125981A1 (en) * | 2021-12-31 | 2023-07-06 | Jade Bird Display (shanghai) Limited | Micro led structure and micro led projector |
| WO2023123491A1 (en) * | 2021-12-31 | 2023-07-06 | Jade Bird Display (Shanghai) Company | Micro led structure and micro led projector |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023123488A1 (en) * | 2021-12-31 | 2023-07-06 | Jade Bird Display (Shanghai) Company | Micro led structure and micro led projector |
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Also Published As
| Publication number | Publication date |
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| WO2012135976A1 (en) | 2012-10-11 |
| CN103081132B (en) | 2017-09-29 |
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