EP2203782A1 - Illumination unit and method for driving the illumination unit - Google Patents
Illumination unit and method for driving the illumination unitInfo
- Publication number
- EP2203782A1 EP2203782A1 EP08802345A EP08802345A EP2203782A1 EP 2203782 A1 EP2203782 A1 EP 2203782A1 EP 08802345 A EP08802345 A EP 08802345A EP 08802345 A EP08802345 A EP 08802345A EP 2203782 A1 EP2203782 A1 EP 2203782A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lighting unit
- lighting
- unit according
- image
- brightness
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
-
- 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
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
- G02F1/13318—Circuits comprising a photodetector
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/066—Adjustment of display parameters for control of contrast
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
Definitions
- Lighting unit and method for controlling the lighting unit are Lighting unit and method for controlling the lighting unit
- the invention relates to a lighting unit and a method for controlling the lighting unit.
- LEDs light emitting diodes
- PWM pulse width modulation
- This illumination device for backlighting displays is described in WO 2004/031844 A1.
- This illumination device comprises different colored light sources arranged to generate light with a white color impression, which are arranged in such a way that mixed-colored light is emitted from the front side of the illumination device.
- the emission characteristic of the illumination devices is inhomogeneous in terms of color and brightness to a high degree.
- the object of the invention is to avoid the abovementioned disadvantages and in particular to provide a back light unit (BLU) which enables energy-efficient operation and can be used, for example, for LCD televisions.
- BLU back light unit
- a lighting unit comprising:
- a detection unit by means of which at least one brightness of an image can be detected
- At least one control unit with the at least one light source and with the
- Detection unit is connected, wherein the at least one light source is controlled by the control unit depending on the at least one brightness of the image; - Several lamps whose brightnesses each individually and / or in clusters on the basis of the control unit is adjustable;
- At least one switch by means of which at least one lamp is short-circuited.
- a development consists in that at least one brightness, in particular several brightnesses of the image, can be detected on the basis of the detection unit.
- Lighting device with an extended Functionality for improved time- and / or location-dependent lighting control.
- the at least one lamp comprises a light emitting diode.
- the at least one light source comprises a plurality of clusters, each cluster comprising one or more light-emitting diodes.
- the cluster has at least two green LEDs, a blue LED and a red LED ("RGGB" cluster).
- each light-emitting diode and / or each cluster of light-emitting diodes can be controlled individually by means of the control unit.
- the at least one luminous means is arranged on at least one substrate.
- control unit comprises at least one dimming device.
- a brightness of the at least one luminous means can be adjustable.
- dimming device may be designed as part of the control unit and / or separately from the control unit.
- the image is a video image, in particular an image of an LCD display.
- the image may be a video image of an LCD television.
- control unit uses the detection unit to illuminate dark areas of the image weaker than bright areas by means of the at least one light source.
- the illumination unit preferably used as a backlight or Hiterleuchtung, allows a significant energy savings.
- An alternative embodiment consists in that the at least one light-emitting means comprises light-emitting diodes with different wavelengths.
- such a switch is provided for each light-emitting diode.
- the switch is preferably an electronic switch that can be activated by the control unit.
- Such a switch for the at least one lighting means can be dynamically activated or preconfigured according to special user wishes (quasi-static).
- a further development is that brightnesses of the image on the basis of the control unit by means of a
- Pulse width modulation and / or a DC control are adjustable.
- the brightness of the at least one luminous means can be adjustable via the pulse width modulation and / or the DC control.
- the DC control can be used in a range of low brightness and the pulse width modulation can be used in a range of high brightness.
- Detection unit comprises at least one photosensor.
- the at least one photosensor can be embodied locally adjacent to the at least one luminous means.
- At least one driver is provided for controlling the at least one lighting means.
- one driver each may be provided for controlling a plurality of series-connected lighting devices, in particular light-emitting diodes.
- barriers are provided between the image and the detection unit, which are suitable for at least partially separating regions of different illumination.
- control unit receives a video signal.
- brightness information of the video signal can be evaluated (e.g.
- the at least one light source can be controlled accordingly.
- the above object is also achieved by a method for driving the lighting unit according to the present description.
- At least one light source based on the detected brightness, wherein based on the at least one light source, at least one dark area of the image is illuminated weaker than at least one bright area of the image;
- At least one switch is provided, by means of which at least one light source is short-circuited.
- the at least one light source comprises a light emitting diode.
- the at least one lighting means may comprise a plurality of clusters, each cluster comprising one or more light-emitting diodes.
- the cluster has at least two green light emitting diodes, a blue light emitting diode and a red light emitting diode.
- the at least one light-emitting means comprises light-emitting diodes with different wavelengths.
- a plurality of lighting means are provided whose brightnesses are set individually and / or in clusters on the basis of the control unit / are.
- Pulse width modulation and / or a DC control can be adjusted.
- the direct current control m can be used in a region of low brightness and / or the pulse width modulation in a region of high brightness. It is also a development that the detection unit comprises at least one photosensor.
- An additional embodiment is that a video signal is applied to the control unit.
- FIG. 1 shows a block diagram of a lighting unit, in particular a back light unit (BLU);
- BLU back light unit
- FIG. 4 shows a circuit arrangement comprising a combined control of pulse width modulation and (DC) current control for a plurality of series-connected bulbs.
- a lighting unit e.g. a backlight unit (BLU) for an LCD TV to display a video image.
- the backlight unit can have a plurality of light-emitting diodes
- LEDs which are arranged flat on one or more substrates, preferably in clusters.
- a plurality of dimming devices may be provided as well as a control unit (control electronics) for controlling the dimming devices in order to regulate the brightness of individual LEDs or individual clusters of LEDs.
- the plurality of dimming devices (or a subset thereof) may be at least partially integral with, or separate from, the control unit.
- the control unit preferably controls the brightness, e.g. by means of the dimming devices, depending on the video image, in particular depending on the brightness of the video image, such that energy-efficient operation, e.g. the LCD display or the TV with the LCD display is enabled. Darker areas of the image are illuminated weaker by the illumination unit than lighter areas of the image.
- the solution presented here efficiently enables a significant energy saving such that an unnecessary power consumption is avoided by adjusting the lighting, in particular the backlight of an LCD display.
- the control unit in particular the dimming devices, may have one or more PWM circuits by means of which one pulse width modulation for one (single) LED or for a group of LEDs comprising one or more LED clusters can be carried out. It is advantageous if LEDs can be controlled individually and / or in groups or clusters by means of their own pulse width modulation. Thus, the brightness of a single LED and / or a LED cluster can be set spatially resolved. It should be noted that advantageously the LEDs and / or LED clusters are provided at (different) positions of the image, so that by appropriate control of the (brightnesses of the) LEDs or the LED cluster certain Positions of the image can be backlit stronger or weaker.
- DC current control for adjusting the brightness of the lamps (LEDs, clusters of LEDs) is used.
- dimming in a bright region is advantageously realized predominantly on the basis of the PWM control, while the gel current control is preferably used in a region of low brightness.
- the dimming device may include a plurality of switches that enable shorting individual LEDs or LED clusters, thereby turning off the affected LEDs or LED clusters.
- the LCD backlighting is achieved by means of the remaining (not short-circuited) LEDs or LED clusters.
- switches can be operated dynamically, i. m Dependence on the currently displayed image, ie m dependency on a video signal displayed on the LCD screen.
- the switches may be preset stationary, e.g. when configuring a television set, for example, values for brightness, contrast, color contrast, etc. preset by the user or the manufacturer quasi-stationary.
- switches can be particularly advantageous when the PWM control reaches its limits for low brightnesses.
- the remaining active (i.e., not short-circuited) LEDs can be operated in a higher brightness range in which PWM control is easily possible.
- the backlight unit at least one photosensor has, by means of which a local illumination state (brightness, color temperature, and / or individual color intensities) can be detected.
- the at least one photosensor is arranged such that at least one electrical output signal of the photosensor is transmitted to the control unit via at least one sense line for evaluation.
- a plurality of photosensors are distributed over an area of the lighting unit, so that several
- Illumination states can be detected at different locations of the image. Thus, it is possible to reliably and with high accuracy to control local lighting conditions of the lighting unit.
- At least two LEDs of different clusters are connected in series and are operated via a common driver (driver stage). This makes it possible to simplify the control unit significantly, since advantageously only a few drivers for the lighting unit must be provided.
- both the drivers and the switches can be controlled by a common control unit (see also FIG. 4).
- diffusely scattering barriers arranged perpendicular to the mounting surface of the luminous means are provided in order to advantageously separate the regions of different illumination.
- Fig.l shows a block diagram of a lighting unit, in particular a backlight unit (BLU).
- BLU backlight unit
- the lighting unit comprises an image 15, which, for example, a video image represented by means of an LCD display 11
- Illuminants 13 are provided for illuminating or backlighting the image 15.
- a plurality of illuminants 13 are arranged distributed over the surface of the image 15, wherein these plurality of illuminants 13 can be combined in clusters of a plurality of illuminants.
- the clusters form individually controllable units.
- LEDs For use as light source 13 are particularly light emitting diodes (LEDs).
- LEDs light emitting diodes
- a plurality of LEDs of different wavelengths can be arranged in a cluster.
- the color of the backlight is adjustable.
- one red, two green and one blue LED can be locally combined (so-called "RGGB" cluster).
- FIG. 1 shows a detection unit 14, by means of which, in particular, a locally distributed brightness of the image 15 can be detected.
- a plurality of sensors in particular photosensors, may be provided, which are arranged locally at a plurality of locations of the flat image 15.
- at least one photosensor is arranged together with each cluster of bulbs.
- illuminating means 13 and detection unit 14 are indicated only symbolically in FIG.
- illuminating means 13 and detection unit 14 preferably comprise a plurality of units or components, which are in particular distributed over the surface of the image 15.
- a control unit 12 which evaluates signals of the detection unit 14 and corresponding to the Illuminant 13, for example, the plurality of locally distributed over the surface of the image 15 cluster of LEDs, drives.
- the control unit 12 has at least one dimming device, by means of which a brightness of the at least one luminous means 13 or each LED or each cluster of LEDs can be set.
- the dimming device can also be arranged separately from the control unit 12. In particular, it is possible that at least a part of the dimming device is arranged on the cluster of LEDs. In particular, a plurality of dimming devices are provided in this case.
- the dimming device can adjust the brightness of the light sources, in particular of each LED or of each cluster of LEDs, by means of pulse width modulation (PWM) and / or by means of DC control.
- PWM pulse width modulation
- FIG. 2 shows two adjacent LED clusters 16 and 17 ("RGGB" clusters), the first cluster 16 having two green LEDs 18, 19, a blue LED 20 and a red LED 21.
- the second LED cluster 17 comprises two green LEDs 22, 23, a blue LED 24 and a red LED 25.
- supply lines 34 to 37 are provided, to the supply line 34, the green LEDs 18 and 22, to the supply line 35, the blue LEDs 20 and 24, to the
- Supply line 36, the red LEDs 21 and 25 and to the supply line 37, the green LEDs 19 and 23 are connected.
- switches 26 to 33 by means of which each of the LEDs 18 to 25 bridged, ie short-circuited can be.
- the switches are preferably designed as electronic switches, which can be activated by means of the control unit 12. Control lines to the switches are not shown separately in Fig.2. 13
- the photosensors 38 and 39 are arranged in a region around the center of the LED cluster 16 and 17 in recesses provided such that the photosensitive surface of the Sensors on the front of the lighting unit and the sense lines (not shown in the figure) are arranged substantially on the back.
- FIG. 4 shows a circuit arrangement comprising a combined control of pulse width modulation and (DC) current regulation for a plurality of series-connected lighting means.
- Fig. 4 comprises a control unit 8 which generates an image, e.g. a video signal 9, and brightness information 10, e.g. via at least one photosensor, receives.
- the control unit 8 is connected via a PWM signal line 6 via an operational amplifier 2 to a PWM switch 3. Furthermore, the control unit 8 influences a current regulator 4.
- the combination of PWM control 3 and 6 and current regulator 4 serves to control the brightness of the LEDs Ia to Ie connected in series. Each LED Ia to Ie can be short-circuited by means of a switch 5a to 5e via the control unit 8.
- Brightness information 10 a lighting unit e.g. a backlight, which in particular comprises the LEDs Ia to Ie, is controlled such that via the
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007044476A DE102007044476A1 (en) | 2007-09-18 | 2007-09-18 | Lighting unit and method for controlling the lighting unit |
PCT/EP2008/007824 WO2009036978A1 (en) | 2007-09-18 | 2008-09-18 | Illumination unit and method for driving the illumination unit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2203782A1 true EP2203782A1 (en) | 2010-07-07 |
Family
ID=40030299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08802345A Withdrawn EP2203782A1 (en) | 2007-09-18 | 2008-09-18 | Illumination unit and method for driving the illumination unit |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100194792A1 (en) |
EP (1) | EP2203782A1 (en) |
CN (1) | CN101802688A (en) |
DE (1) | DE102007044476A1 (en) |
WO (1) | WO2009036978A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9692946B2 (en) * | 2009-06-29 | 2017-06-27 | Dolby Laboratories Licensing Corporation | System and method for backlight and LCD adjustment |
KR101587603B1 (en) * | 2009-09-21 | 2016-01-25 | 삼성디스플레이 주식회사 | Display apparatus and method of driving the same |
US8907884B2 (en) * | 2010-01-06 | 2014-12-09 | Apple Inc. | LED backlight system |
DE102010003244A1 (en) * | 2010-03-25 | 2011-09-29 | Osram Gesellschaft mit beschränkter Haftung | Method and circuit arrangement for operating a plurality of LEDs |
CN111328171A (en) * | 2019-12-12 | 2020-06-23 | 陕西速源节能科技有限公司 | Electric lamp brightness control system |
Family Cites Families (16)
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DE4022166A1 (en) * | 1990-07-12 | 1992-01-16 | Siemens Ag | Integratable, low loss multiple LED driver - uses microprocessor controlling LEDs arranged in groups of serial circuits, each contg. antiparallel pairs of LEDs |
EP0967590A1 (en) * | 1998-06-25 | 1999-12-29 | Hewlett-Packard Company | Optical display device using LEDs and its operating method |
EP1006506A1 (en) * | 1998-12-03 | 2000-06-07 | Hewlett-Packard Company | Optical vehicle display |
DE10018528A1 (en) * | 2000-04-13 | 2001-10-18 | Mannesmann Vdo Ag | Liquid crystal display, especially in a motor vehicle |
US6841947B2 (en) * | 2002-05-14 | 2005-01-11 | Garmin At, Inc. | Systems and methods for controlling brightness of an avionics display |
DE10245892A1 (en) | 2002-09-30 | 2004-05-13 | Siemens Ag | Illumination device for backlighting an image display device |
KR100741963B1 (en) * | 2003-11-27 | 2007-07-23 | 삼성에스디아이 주식회사 | Liquid Crystal Display and Method of driving the same |
JP4241487B2 (en) | 2004-04-20 | 2009-03-18 | ソニー株式会社 | LED driving device, backlight light source device, and color liquid crystal display device |
KR100628718B1 (en) * | 2005-02-26 | 2006-09-28 | 삼성전자주식회사 | Led driver |
US7375476B2 (en) * | 2005-04-08 | 2008-05-20 | S.C. Johnson & Son, Inc. | Lighting device having a circuit including a plurality of light emitting diodes, and methods of controlling and calibrating lighting devices |
DE602005012083D1 (en) * | 2005-07-29 | 2009-02-12 | Osram Gmbh | Multi-cell LED arrangement, LED array and manufacturing process |
DE102005049579A1 (en) * | 2005-10-17 | 2007-04-19 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Light source that emits mixed-color light, and methods for controlling the color location of such a light source |
DE102005059765A1 (en) * | 2005-12-14 | 2007-06-21 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Display device with a plurality of pixels and method for displaying images |
DE102006033894B4 (en) * | 2005-12-16 | 2019-05-09 | Osram Gmbh | Lighting device and display device with a lighting device |
KR20070077268A (en) * | 2006-01-23 | 2007-07-26 | 삼성전자주식회사 | Backlight assembly and liquid crystal display device having the same |
US8587214B2 (en) * | 2006-12-15 | 2013-11-19 | Osram Gesellschaft Mit Beschrankter Haftung | LED module with dedicated color regulation and corresponding method |
-
2007
- 2007-09-18 DE DE102007044476A patent/DE102007044476A1/en not_active Withdrawn
-
2008
- 2008-09-18 WO PCT/EP2008/007824 patent/WO2009036978A1/en active Application Filing
- 2008-09-18 EP EP08802345A patent/EP2203782A1/en not_active Withdrawn
- 2008-09-18 CN CN200880107511A patent/CN101802688A/en active Pending
- 2008-09-18 US US12/678,746 patent/US20100194792A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2009036978A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102007044476A1 (en) | 2009-03-19 |
CN101802688A (en) | 2010-08-11 |
US20100194792A1 (en) | 2010-08-05 |
WO2009036978A1 (en) | 2009-03-26 |
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