US20040104885A1 - Backlight system architecture for mobile display system - Google Patents
Backlight system architecture for mobile display system Download PDFInfo
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- US20040104885A1 US20040104885A1 US10/721,588 US72158803A US2004104885A1 US 20040104885 A1 US20040104885 A1 US 20040104885A1 US 72158803 A US72158803 A US 72158803A US 2004104885 A1 US2004104885 A1 US 2004104885A1
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- mobile unit
- base station
- light sources
- mobile
- display
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- 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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/04—Supports for telephone transmitters or receivers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1601—Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1626—Constructional details or arrangements for portable computers with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1632—External expansion units, e.g. docking stations
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
- G06F1/3215—Monitoring of peripheral devices
- G06F1/3218—Monitoring of peripheral devices of display devices
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
-
- 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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133612—Electrical details
-
- 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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2200/00—Indexing scheme relating to G06F1/04 - G06F1/32
- G06F2200/16—Indexing scheme relating to G06F1/16 - G06F1/18
- G06F2200/161—Indexing scheme relating to constructional details of the monitor
- G06F2200/1612—Flat panel monitor
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Human Computer Interaction (AREA)
- Signal Processing (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Power Sources (AREA)
Abstract
The present invention provides a mobile display system with an improved backlight system. In one embodiment of the invention, the mobile display system comprises a mobile unit including a flat panel display, and a first backlight circuit for providing light to the display. The first backlight circuit includes a plurality of lights sources disposed near edges of the mobile unit and a single power supply for powering a pre-selected one of the light sources. The system also comprises a base station capable of being powered by an external power source. The base station includes a second backlight circuit that comprises at least one power supply for powering the plurality of light sources in the mobile unit when the mobile unit is attached to the base station. This invention keeps the weight and power consumption of the mobile unit low, but allows long battery life at the compromise of display surface light intensity while mobile and provides high brightness characteristics when docked.
Description
- This invention is a continuation of and claims the benefit of co-pending U.S. application Ser. No. 09/992,601 entitled BACKLIGHT SYSTEM ARCHITECTURE FOR MOBILE DISPLAY SYSTEM filed on Nov. 13, 2001, the entire disclosure of which is hereby incorporated by reference and set forth in its entirety for all purposes.
- The invention generally relates to backlight systems, and more particularly to backlight systems for mobile display systems.
- Mobile devices, such as mobile and handheld PCs, portable TVs and other mobile Internet appliances, have been widely used in our daily lives. Due to their size and mobility, these devices are particularly convenient to people who travel frequently or need to have access to information at any time or in any location, from the Internet or in a stored database for example. When the AC power is available, mobile devices are typically used in conjunction with a docking station on a desktop or elsewhere in an attached or docked mode. The docking station provides network connections as well as connections to peripheral devices, such as a printer. Because their flexibility of being able to be used in either docked mode or mobile (or undocked) mode, there are requirements for high brightness (with similar luminance as stationary monitors) when the mobile devices are docked and powered by mains power, and for optimization of battery life when they are operated in the mobile mode.
- A conventional solution for notebook PCs for example, is to use a dimmable power supply. In this case, the backlight power is regulated based on the condition of the re-charger being attached to the notebook PC. When the notebook PC is used in the mobile mode, the optimization of battery life can be achieved by reduction of power in the backlight. This consequently results in reduction of luminance to 60-80 candela/m2. If the notebook PC is plugged into an AC power outlet on the wall, the maximum power of the backlight is increased by increasing the current of the internal lamp or the current duty cycle, relative to its maximum value in the battery operated mode. However, even with the increase of the current the brightness achieved is only in the range of 80-100 candela/m2, which is far less bright as compared to that of flat panel monitors powered mains power, which has the luminous intensity of 250 plus candela/m2.
- Thus, most mobile electronic products today are not able to achieve high brightness, unless both weight and thickness are sacrificed.
- Therefore, there is a need for a mobile device that maintains mobile characteristics of low weight, thinness and long battery life, while providing functionality, e.g., high brightness, of a mains powered desktop product.
- The present invention provides a mobile display system with an improved backlight system. According to a first embodiment of the invention, the mobile display system comprises a mobile unit including a flat panel display, and a first backlight circuit for providing light to the display. The first backlight circuit includes a plurality of lights sources disposed near edges of the mobile unit and a single power supply for powering a pre-selected one of the light sources. The system also comprises a base station capable of being powered by an external power source. The base station includes a second backlight circuit that comprises at least one power supply for powering the plurality of light sources in the mobile unit when the mobile unit is attached to the base station. This embodiment allows the use of a single power supply in the mobile unit, keeping weight and power consumption low, but allowing long battery life at the compromise of display surface light intensity.
- According to a second embodiment of the invention, the mobile display system comprises a mobile unit including a flat panel display, and a first backlight circuit for providing light to the display. The flat panel display has selected surfaces made in materials capable of coupling external light. The first backlight circuit includes a single light source disposed near a pre-selected edge of the mobile unit and a single power supply for powering the light source. The system also comprises a base station capable of being powered by an external power source. The base station includes a second backlight circuit that comprises a plurality of light sources disposed near edges of the base station and at least one power supply for powering the plurality of light sources. The base station has selected surfaces made of materials capable of coupling light out of the plurality of light sources and into the display when the mobile unit is attached to the base station. This embodiment allows the use of a single power supply and a single light source in the mobile unit, keeping weight and power consumption low, but allowing long battery life at the compromise of display surface light intensity.
- Other objects and attainments together with a fuller understanding of the invention will become apparent and appreciated by referring to the following description and claims taken in conjunction with the accompanying drawings.
- The invention is explained in further detail, and by way of example, with reference to the accompanying drawings wherein:
- FIG. 1 shows a basic configuration of a mobile display system according to one embodiment of the invention;
- FIG. 2A shows a mobile display system according to a first embodiment of the invention;
- FIG. 2B shows a backlight system for the first embodiment of the invention;
- FIG. 3A shows a mobile display system according to a second embodiment of the invention; and
- FIG. 3B shows a backlight system for the second embodiment of the invention.
- Throughout the drawings, the same reference numerals indicate similar or corresponding features or functions.
- FIG. 1 shows a basic configuration of a mobile display system10 according to one embodiment of the invention. Display system 10 comprises a battery powered
mobile unit 12 and a mains poweredbase station 16, which includes anelectrical cord 17 for plugging into an AC power outlet or other external power source.Mobile unit 12 has fouredges flat panel display 14.Mobile unit 12 may be either a stand-alone mobile device, e.g., a mobile PC, or a flat panel monitor, e.g., a LCD display, for use with a mobile device.Base station 16 is configured to have asurface 15, aslanted surface 18 and two guidingrails Guiding rails inner surfaces Mobile unit 12 can be attached tobase station 16 alongslanted surface 18 and guidingrails surface 15. - FIG. 2A shows a
mobile display system 20 according to a first embodiment of the invention.Display system 20 has the same basic configuration as that of system 10 in FIG. 1 and includes amobile unit 22 and abase station 26. As shown in FIG. 2A,mobile unit 22 also includeselectrical connectors Base station 26 also includeselectrical connectors switch 36. - FIG. 2B shows a
backlight system 40 for the first embodiment of the invention.Backlight system 40 comprises abacklight circuit 41 a inmobile unit 22 and abacklight circuit 41 b inbase station 26. As shown in FIG. 2B,backlight circuit 41 a comprises a plurality of light sources, e.g.,lamps mobile unit 22. Although there are only four lamps illustrated, additional lamps may be used and placed along any ofedges Backlight circuit 41 a also includes a built-inpower supply 48 c powered by a battery (not shown).Backlight circuit 41 b includes a plurality ofpower supplies lamp 42 c is used and powered by built-inpower supply 48 c. In docked mode, in addition tolamp 42 c,lamps power supplies - In
backlight circuit 41 b inbase station 26, a plurality ofbacklight power supplies connectors mobile unit 22, viaconnectors - Once
mobile unit 22 is attached tobase station 26 in docked mode,connectors connectors base station 26 to power itsinternal power supplies mobile unit 22, thereby increasing the light output at the viewable surface ofdisplay 14. In this embodiment, switch 36 is designed so that no high voltage from the internal power supplies ofbase station 26 is generated unlessmobile unit 22 is fully attached tobase station 26. This embodiment allows the use of a single power supply in the mobile unit, keeping weight and power consumption low, but allowing long battery life at the compromise of display surface light intensity. - FIG. 3A shows a mobile display system50 according to a second embodiment of the invention. This embodiment again has the same basic configuration as that of system 10 in FIG. 1 and includes a
mobile unit 52 and abase station 56.Base station 56 also includes a detection mechanism, e.g.,switch 57. - FIG. 3B shows a
backlight system 60 for the second embodiment of the invention.Backlight system 60 comprises afirst backlight circuit 61 a inmobile unit 52 and asecond backlight circuit 61 b inbase station 56.Circuit 61 a includes a single light source, e.g.,lamp 64 c, located nearedge 28 c ofmobile unit 52, and a single built-inpower supply 68 c powered by a battery (not shown).Circuit 61 b includes a plurality of additional light sources, e.g.,lamps surfaces additional power supplies lamp 28 c is used and powered by built-inpower supply 68 c. In docked mode, in addition tolamp 64 c,lamps power supplies - In this second embodiment, surfaces28 a, 28 b and 28 d of
mobile unit 52 may be constructed of, for instance, transparent or translucent material, capable of coupling light from outside ofmobile unit 52 into the backlight structure of the unit. Alternatively, the complete encasing plastics ofmobile unit 52 may be made of such transparent or translucent material.Surfaces base station 56 may also be constructed of materials capable of coupling light from thelamps base station 56, intomobile unit 52. Whenmobile unit 52 is attached tobase station 56 in docked mode, switch 57 is activated and lamps inbase station 56 are powered. This causes light to be optically coupled intomobile unit 52 through surface pairs 28 a/15, 28 b/29 b, and 28 d/29 a, thereby increasing light output at the viewable surface ofdisplay 14. - This embodiment allows the use of a single power supply and a single light source in the mobile unit, keeping weight and power consumption low, but allowing long battery life at the compromise of display surface light intensity.
- While the invention has been described in conjunction with specific embodiments, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications and variations as fall within the spirit and scope of the appended claims.
Claims (20)
1. A backlight system for use with a mobile display system that includes a mobile unit capable of being powered by a battery and a base station capable of being powered by an external power source, the backlight system comprising:
a first circuit in the mobile unit, the first circuit including a plurality of light sources disposed near edges of the mobile unit and a first power supply for powering a pre-selected one of the light sources when operating in a mobile mode of operation; and
a second circuit in the base station, the second circuit including at least a second power supply separate from the mobile unit for powering a plurality of the light sources in the mobile unit when the mobile unit is attached to the base station.
2. The system of claim 1 , wherein the second circuit further comprises a plurality of power supplies for powering the plurality of light sources respectively when the mobile unit is attached to the base station.
3. A mobile display system comprising a mobile unit, the mobile unit including:
a flat panel display; and
a first backlight circuit for providing light to the display, the first backlight circuit including a plurality of lights sources disposed near edges of the mobile unit, and a single power supply connected to a pre-selected one of the light sources for powering only the pre-selected light source, the mobile unit being dockable in a base station having a second power supply associated therewith, the docking of the mobile unit in the base station connecting the second power supply to a plurality of the light sources for powering a plurality of the light sources.
4. The system of claim 3 , further comprising a base station capable of being powered by an external power source, the base station including a second backlight circuit that comprises at least a second power supply for powering the plurality of light sources in the mobile unit when the unit is attached to the base station.
5. The system of claim 4 , wherein the base station further includes a detection mechanism for detecting whether the mobile unit is attached to the base station so as to allow the external power source to power the light sources within the mobile unit.
6. The system of claim 5 , wherein the second backlight circuit further comprises a plurality of power supplies for powering the plurality of light sources respectively when the mobile unit is attached to the base station.
7. The system of claim 6 ,
wherein each of the mobile unit and the base station includes at least one electrical connector;
wherein the electrical connectors of the mobile unit and the base station are connected to each other when the mobile unit is attached to the base station.
8. A backlight system for use with a mobile display system that includes a mobile unit capable of being powered by a battery and a base station capable of being powered by an external power source, the backlight system comprising:
a first circuit in the mobile unit, the first circuit including a plurality of light sources disposed near edges of the mobile unit and a single power supply for powering a pre-selected one of the light sources; and
a second circuit in the base station, the second circuit including at least one power supply for powering the plurality of the light sources in the mobile unit when the mobile unit is attached to the base station; and
wherein the second circuit further comprises a plurality of power supplies for powering the plurality of light sources respectively when the mobile unit is attached to the base station.
9. A mobile display system comprising a mobile unit, the mobile unit including:
a flat panel display; and
a first backlight circuit for providing light to the display, the first backlight circuit including a plurality of lights sources disposed near edges of the mobile unit, and a single power supply connected to a pre-selected one of the light sources for powering only the pre-selected light source; and
further comprising a base station capable of being powered by an external power source, the base station including a second backlight circuit that comprises at least one power supply for powering the plurality of light sources in the mobile unit when the unit is attached to the base station; and
wherein the base station further includes a detection mechanism for detecting whether the mobile unit is attached to the base station so as to allow the external power source to power the light sources within the mobile unit.
10. The system of claim 9 , wherein the second backlight circuit further comprises a plurality of power supplies for powering the plurality of light sources respectively when the mobile unit is attached to the base station.
11. The system of claim 10 , wherein each of the mobile unit and the base station includes at least one electrical connector;
wherein the electrical connectors of the mobile unit and the base station are connected to each other when the mobile unit is attached to the base station.
12. An AC powered base station configured to removably attach to a battery powered mobile, the base station combining with a mobile unit to form an illumination system, the illumination system comprising:
a first circuit in the mobile unit, the first circuit including one or more light sources for illuminating a display of the mobile unit, the first circuit being battery powered when unattached to the base station; and
a second AC powered circuit in the base station, including at least one means for illuminating the mobile unit's display when the mobile unit is attached to the base unit.
13. The base station of claim 12 wherein the means for illuminating the mobile unit's display is configured to increase the illumination of the display relative to a battery-powered illumination mode for the mobile unit when it is not attached to the base unit.
14. The base station of claim 13 wherein the means for increasing the illumination of the mobile unit's display comprises at least one power supply for connecting to the first circuit and powering the one or more light sources in the mobile unit.
15. The base station of claim 14 , wherein the second circuit further comprises a plurality of power supplies for powering a plurality of light sources respectively when the mobile unit is attached to the base station.
16. The base station of claim 14 further comprising a detection mechanism for detecting whether the mobile unit is attached to the base station so as to allow the external power source to power the light sources within the mobile unit.
17. The base station of claim 16 wherein the display is a flat panel display and the plurality of lights sources are disposed near edges of the mobile unit.
18. The base station of claim 12 wherein the base unit includes at least one light source, the light source being coupleable to the mobile unit to transmit light to the display when the mobile unit is attached to the base station through a selected surface on the base station, the surface comprising a light transmissive material.
19. The base station of claim 18 wherein the light is transmitted into a backlight structure of the mobile unit.
20. The base station of claim 18 wherein the base unit is configured so that attaching the mobile unit to the base station switches on power to at least one light source in the base station that transmits light to the mobile unit's display.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/721,588 US20040104885A1 (en) | 2001-11-13 | 2003-11-24 | Backlight system architecture for mobile display system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/992,601 US6791528B2 (en) | 2001-11-13 | 2001-11-13 | Backlight system architecture for mobile display system |
US10/721,588 US20040104885A1 (en) | 2001-11-13 | 2003-11-24 | Backlight system architecture for mobile display system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/992,601 Continuation US6791528B2 (en) | 2001-11-13 | 2001-11-13 | Backlight system architecture for mobile display system |
Publications (1)
Publication Number | Publication Date |
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US20040104885A1 true US20040104885A1 (en) | 2004-06-03 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US09/992,601 Expired - Fee Related US6791528B2 (en) | 2001-11-13 | 2001-11-13 | Backlight system architecture for mobile display system |
US10/721,588 Abandoned US20040104885A1 (en) | 2001-11-13 | 2003-11-24 | Backlight system architecture for mobile display system |
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Application Number | Title | Priority Date | Filing Date |
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US09/992,601 Expired - Fee Related US6791528B2 (en) | 2001-11-13 | 2001-11-13 | Backlight system architecture for mobile display system |
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US (2) | US6791528B2 (en) |
EP (1) | EP1449054A1 (en) |
JP (1) | JP2005509939A (en) |
KR (1) | KR20040066809A (en) |
CN (1) | CN1585920A (en) |
TW (1) | TW200407829A (en) |
WO (1) | WO2003042801A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050041008A1 (en) * | 2003-07-28 | 2005-02-24 | Samsung Electronics Co., Ltd. | Electronic system having backlight adjustment function and method of adjusting backlight |
US20080252575A1 (en) * | 2007-04-12 | 2008-10-16 | Microsoft Corporation | Photo-luminescent backlight support for power saving |
US10403213B2 (en) * | 2016-06-22 | 2019-09-03 | Samsung Display Co., Ltd. | Cradle and display device having the same |
WO2020018100A1 (en) * | 2018-07-19 | 2020-01-23 | Hewlett-Packard Development Company, L.P. | Backlight source selection based on power source |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW594223B (en) * | 2002-01-29 | 2004-06-21 | Chi Mei Optoelectronics Corp | Backlight module and liquid crystal display device |
FR2843792B1 (en) * | 2002-08-20 | 2005-04-08 | Thales Sa | HIGH LUMINANCE LIGHT BOX FOR VISUALIZATIONS |
US7166930B2 (en) * | 2003-07-21 | 2007-01-23 | Eaton Power Quality Corporation | Uninterruptible power supply apparatus and methods using a display with variable backlighting |
US20050073517A1 (en) * | 2003-10-07 | 2005-04-07 | Yuh-Shyang Wu | Display device with a luminous display base |
FR2876488A1 (en) * | 2004-10-08 | 2006-04-14 | Bei Jay Jacques Martin M | Information display device for use with fixed or portable computer, has inlet/outlet assembly connected to computer, arch tilted to hold screen in vertical position and translation card displaying information provided to computer |
KR100739788B1 (en) * | 2006-01-25 | 2007-07-13 | 삼성전자주식회사 | Display device using a outside light |
US20100039395A1 (en) * | 2006-03-23 | 2010-02-18 | Nurmi Juha H P | Touch Screen |
JP5126870B2 (en) * | 2007-02-14 | 2013-01-23 | 信幸 春日 | Card display device for card game |
US20090231795A1 (en) * | 2008-03-07 | 2009-09-17 | Charles Eric Green | Ergonomic adjustable screen-view technology |
JP5177917B1 (en) * | 2011-10-24 | 2013-04-10 | Necインフロンティア株式会社 | Charging stand for portable information terminals |
JP5198644B1 (en) * | 2011-10-28 | 2013-05-15 | 株式会社東芝 | Electronic device stand, docking station, support device, and electronic device system |
USD894855S1 (en) * | 2018-12-21 | 2020-09-01 | Stryker Corporation | User interface housing |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5657459A (en) * | 1992-09-11 | 1997-08-12 | Canon Kabushiki Kaisha | Data input pen-based information processing apparatus |
US5696529A (en) * | 1995-06-27 | 1997-12-09 | Silicon Graphics, Inc. | Flat panel monitor combining direct view with overhead projection capability |
US5796382A (en) * | 1995-02-18 | 1998-08-18 | International Business Machines Corporation | Liquid crystal display with independently activated backlight sources |
US5854617A (en) * | 1995-05-12 | 1998-12-29 | Samsung Electronics Co., Ltd. | Circuit and a method for controlling a backlight of a liquid crystal display in a portable computer |
US6301106B1 (en) * | 1998-10-26 | 2001-10-09 | Hewlett-Packard Company | Docking station having a plurality of adapter trays for a plurality of portable computers |
US20010043188A1 (en) * | 1998-03-31 | 2001-11-22 | Atsunori Nakamura | Information terminal device with display-illuminating means |
US6417833B1 (en) * | 1999-06-11 | 2002-07-09 | Nec Corporation | Liquid crystal display apparatus and method for lighting backlight thereof |
US6426736B1 (en) * | 1998-12-28 | 2002-07-30 | Nec Corporation | Portable telephone with liquid crystal display |
US6462941B1 (en) * | 2000-06-30 | 2002-10-08 | Palm, Inc. | Method and apparatus for backlighting a handwriting input area for a portable computing device |
US6483698B1 (en) * | 1998-11-27 | 2002-11-19 | Hewlett-Packard Company | Cradle for supporting a PDA and similar portable electronic devices |
US6625015B2 (en) * | 2002-02-27 | 2003-09-23 | Hewlett-Packard Development Company, L.P. | Portable computer docking tray system |
US6711005B2 (en) * | 2001-09-10 | 2004-03-23 | Hewlett-Packard Development Company, L.P. | Small computing device having a light source |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03245180A (en) * | 1990-02-23 | 1991-10-31 | Toshiba Corp | Brightness controller for panel display |
WO1992001193A1 (en) * | 1990-07-11 | 1992-01-23 | Curtis Manufacturing Company, Inc. | Light apparatus for use with a compact computer video screen |
CA2059498A1 (en) * | 1991-01-22 | 1992-07-23 | Hideki Takahara | Data input and display apparatus |
US6151008A (en) | 1997-08-01 | 2000-11-21 | Compaq Computer Corporation | Method and apparatus for controlling the brightness of a display screen |
US6941158B2 (en) * | 2000-05-05 | 2005-09-06 | Pace Micro Technology Plc | Portable communications device |
-
2001
- 2001-11-13 US US09/992,601 patent/US6791528B2/en not_active Expired - Fee Related
-
2002
- 2002-11-12 JP JP2003544568A patent/JP2005509939A/en not_active Withdrawn
- 2002-11-12 KR KR10-2004-7007184A patent/KR20040066809A/en not_active Application Discontinuation
- 2002-11-12 EP EP02781501A patent/EP1449054A1/en not_active Withdrawn
- 2002-11-12 WO PCT/IB2002/004748 patent/WO2003042801A1/en not_active Application Discontinuation
- 2002-11-12 CN CNA02822390XA patent/CN1585920A/en active Pending
- 2002-11-13 TW TW091133251A patent/TW200407829A/en unknown
-
2003
- 2003-11-24 US US10/721,588 patent/US20040104885A1/en not_active Abandoned
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5657459A (en) * | 1992-09-11 | 1997-08-12 | Canon Kabushiki Kaisha | Data input pen-based information processing apparatus |
US5796382A (en) * | 1995-02-18 | 1998-08-18 | International Business Machines Corporation | Liquid crystal display with independently activated backlight sources |
US5854617A (en) * | 1995-05-12 | 1998-12-29 | Samsung Electronics Co., Ltd. | Circuit and a method for controlling a backlight of a liquid crystal display in a portable computer |
US5696529A (en) * | 1995-06-27 | 1997-12-09 | Silicon Graphics, Inc. | Flat panel monitor combining direct view with overhead projection capability |
US20010043188A1 (en) * | 1998-03-31 | 2001-11-22 | Atsunori Nakamura | Information terminal device with display-illuminating means |
US6301106B1 (en) * | 1998-10-26 | 2001-10-09 | Hewlett-Packard Company | Docking station having a plurality of adapter trays for a plurality of portable computers |
US6483698B1 (en) * | 1998-11-27 | 2002-11-19 | Hewlett-Packard Company | Cradle for supporting a PDA and similar portable electronic devices |
US6426736B1 (en) * | 1998-12-28 | 2002-07-30 | Nec Corporation | Portable telephone with liquid crystal display |
US6417833B1 (en) * | 1999-06-11 | 2002-07-09 | Nec Corporation | Liquid crystal display apparatus and method for lighting backlight thereof |
US6462941B1 (en) * | 2000-06-30 | 2002-10-08 | Palm, Inc. | Method and apparatus for backlighting a handwriting input area for a portable computing device |
US6711005B2 (en) * | 2001-09-10 | 2004-03-23 | Hewlett-Packard Development Company, L.P. | Small computing device having a light source |
US6625015B2 (en) * | 2002-02-27 | 2003-09-23 | Hewlett-Packard Development Company, L.P. | Portable computer docking tray system |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050041008A1 (en) * | 2003-07-28 | 2005-02-24 | Samsung Electronics Co., Ltd. | Electronic system having backlight adjustment function and method of adjusting backlight |
US20080252575A1 (en) * | 2007-04-12 | 2008-10-16 | Microsoft Corporation | Photo-luminescent backlight support for power saving |
US7808475B2 (en) | 2007-04-12 | 2010-10-05 | Microsoft Corporation | Photo-luminescent backlight support for power saving |
US10403213B2 (en) * | 2016-06-22 | 2019-09-03 | Samsung Display Co., Ltd. | Cradle and display device having the same |
WO2020018100A1 (en) * | 2018-07-19 | 2020-01-23 | Hewlett-Packard Development Company, L.P. | Backlight source selection based on power source |
US11393417B2 (en) | 2018-07-19 | 2022-07-19 | Hewlett-Packard Development Company, L.P. | Backlight source selection based on power source |
Also Published As
Publication number | Publication date |
---|---|
KR20040066809A (en) | 2004-07-27 |
US6791528B2 (en) | 2004-09-14 |
WO2003042801A1 (en) | 2003-05-22 |
CN1585920A (en) | 2005-02-23 |
TW200407829A (en) | 2004-05-16 |
EP1449054A1 (en) | 2004-08-25 |
US20030090454A1 (en) | 2003-05-15 |
JP2005509939A (en) | 2005-04-14 |
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Legal Events
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STCB | Information on status: application discontinuation |
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