CN101158783A - Back light device - Google Patents
Back light device Download PDFInfo
- Publication number
- CN101158783A CN101158783A CNA200710177506XA CN200710177506A CN101158783A CN 101158783 A CN101158783 A CN 101158783A CN A200710177506X A CNA200710177506X A CN A200710177506XA CN 200710177506 A CN200710177506 A CN 200710177506A CN 101158783 A CN101158783 A CN 101158783A
- Authority
- CN
- China
- Prior art keywords
- circuit board
- drive circuit
- led
- driving circuit
- lighting device
- 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.)
- Pending
Links
Images
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a backlight device, which comprises a control circuit board, and also comprises one or a plurality of drive circuit boards, each drive circuit board is provided with a plurality of LEDs and a drive circuits to drive the LED, the control circuit board is connected with the drive circuit through a linker. The invention divides the whole backlight source into one or a plurality of drive circuit boards, the drive circuit and the LED are arranged on the drive circuit board, the drive circuit is connected with the control circuit board through the linker, the connecting problems between numerous LED and the drive circuit in the large size LED backlight source is effectively solved.
Description
Technical field
The present invention relates to back lighting device, especially a kind of back lighting device that is applicable to the large scale liquid crystal display.
Background technology
LCD is as a kind of passivity display device, and itself can be not luminous, and its deflection by liquid crystal molecule comes the light of diffraction backlight, thereby represents graph image.Therefore, the backlight technology directly has influence on the image quality of the graph image of liquid crystal display displays.Traditional LCD adopts cold-cathode fluorescence lamp (Cold Cathode Fluorescent Lamps usually, hereinafter to be referred as: CCFL) as backlight, the colour gamut of its covering has only (the National Television SystemCommittee of National Television System Committee, hereinafter to be referred as: NTSC) about 70% of the colourcast standard of Zhi Dinging, caused LCD color deficiency.
Light emitting diode (Light Emitting Diode, hereinafter to be referred as: LED) colour gamut of backlight has reached 105% of NTSC standard, and the LED-backlit source technology has solved the problem of LCD color deficiency.At present, LCD has become the main flow display, and the LED-backlit source relies on its unique advantage, demonstrates powerful application prospect in LCD gradually.
At present, the LED-backlit source is mainly used on the liquid crystal panel of small-medium size, for example: mobile phone, personal digital assistant (Personal Digital Assistant, hereinafter to be referred as: PDA), satellite navigation system etc.The big screen LED backlight liquid crystal display of having issued its QUALIA005 series first from Sony in 2004 begins, and increasing in the world television factory begins to develop large scale liquid crystal LED-backlit source.In realizing process of the present invention, the inventor finds: in existing LED-backlit source, exist multiple LED and drive method for designing, wherein, majority is opened design with driving circuit and LED branch.And in large scale LED-backlit source, LED is very many, generally has thousands of, how effectively to solve being connected of driving circuit and each LEDs, becomes to be badly in need of the major issue that solves in the research and development of large scale liquid crystal LED-backlit source.
Summary of the invention
Technical matters to be solved by this invention is: solve in the large scale liquid crystal LED-backlit source annexation of driving circuit and LED.
For solving the problems of the technologies described above, a kind of back lighting device provided by the invention, comprise control circuit board, also comprise one or more drive circuit boards, the driving circuit that each drive circuit board is provided with many group LED and every group of LED driven, described control circuit board is connected with described driving circuit by connector.
Driving circuit on each drive circuit board is a plurality of, and each driving circuit drives one or more groups LED on the drive circuit board of place.Every group of LED is used to blend together white light, comprises plurality of LEDs.Preferably, every group of LED comprises three or four LEDs.
Further, driving circuit is arranged on the edge of described drive circuit board.
In addition, also be provided with one or more mounting holes that described drive circuit board are fixed in external component on the described drive circuit board.
The present invention is divided into one or more drive circuit boards with the entire backlight source, driving circuit and LED are arranged on the drive circuit board, connect driving circuit and control circuit board by connector, efficiently solve in the large scale LED-backlit source connectivity problem of numerous LED and driving circuit.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of back lighting device embodiment of the present invention.
Fig. 2 is the structural representation of drive circuit board one embodiment of the present invention.
Fig. 3 is the structural representation of another embodiment of drive circuit board of the present invention.
Description of reference numerals:
The 1-drive circuit board; The 2-connector; The 3-control circuit board;
The 11-driving circuit; 12-LED; The 13-mounting hole.
Embodiment
The back lighting device of the embodiment of the invention comprises control circuit board, one or more drive circuit board, the driving circuit that each drive circuit board is provided with many group LED and every group of LED driven, and control circuit board is connected with driving circuit by connector.
As shown in Figure 1, be the structural representation of back lighting device embodiment of the present invention, as shown in Figure 2, be the structural representation of drive circuit board one embodiment of the present invention.Simultaneously referring to Fig. 1 and Fig. 2, the back lighting device of the embodiment of the invention comprises a plurality of drive circuit boards 1 and a control circuit board 3, and the connector 2 that connects each drive circuit board 1 and control circuit board 3, one end of connector 2 connects drive circuit board 1, the other end connects control circuit board 3, realizes the signal transmission between drive circuit board 1 and the control circuit board 3.The driving circuit 11 that each drive circuit board 1 is provided with many group LED12 and every group of LED12 driven.Driving circuit 11 on each drive circuit board 1 is a plurality of, each driving circuit 11 is used for responsible one or more groups LED12 that drives on its place drive circuit board 1, alternating voltage is converted to DC voltage, and finishes the coupling with the voltage and current of LED12 simultaneously.Control circuit board 3 can pass through connector 2 control Driver Circuit, realizes the isoparametric control of color, brightness to LED12.
Every group of LED12 is used to blend together white light, comprises plurality of LEDs.In Fig. 2, every group of LED12 comprises three LEDs.
The entire backlight source is divided into one or more drive circuit boards, and driving circuit and LED are arranged on the drive circuit board, can connect driving circuit and LED easily, efficiently solve in the large scale LED-backlit source connectivity problem of numerous LED and driving circuit.
As shown in Figure 3, be the structural representation of another embodiment of drive circuit board of the present invention, in the drive circuit board of this embodiment, every group of LED12 comprises four LEDs.
For convenience being connected of connector 2 and driving circuit 11, driving circuit 11 is preferably disposed on the edge of drive circuit board 1.
In addition, again referring to Fig. 2 or Fig. 3, can also be provided with on the drive circuit board 1 and one or more drive circuit board 1 is fixed in external component, for example: the mounting hole 13 on the back panel of liquid crystal display.
It should be noted last that: above embodiment is only in order to illustrating technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is had been described in detail with reference to above-mentioned preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and this modification or be equal to the spirit and scope that replacement does not break away from technical solution of the present invention.
Claims (6)
1. back lighting device, comprise control circuit board, it is characterized in that, also comprise one or more drive circuit boards, the driving circuit that each drive circuit board is provided with many group LED and every group of LED driven, described control circuit board is connected with described driving circuit by connector.
2. back lighting device according to claim 1 is characterized in that, the driving circuit on each drive circuit board is a plurality of, and each driving circuit drives one or more groups LED on the drive circuit board of place.
3. back lighting device according to claim 1 and 2 is characterized in that, every group of LED is used to blend together white light, comprises plurality of LEDs.
4. back lighting device according to claim 3 is characterized in that, every group of LED comprises three or four LEDs.
5. back lighting device according to claim 1 and 2 is characterized in that driving circuit is arranged on the edge of described drive circuit board.
6. back lighting device according to claim 1 and 2 is characterized in that, also is provided with one or more mounting holes that described drive circuit board are fixed in external component on the described drive circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710177506XA CN101158783A (en) | 2007-11-16 | 2007-11-16 | Back light device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710177506XA CN101158783A (en) | 2007-11-16 | 2007-11-16 | Back light device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101158783A true CN101158783A (en) | 2008-04-09 |
Family
ID=39306929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710177506XA Pending CN101158783A (en) | 2007-11-16 | 2007-11-16 | Back light device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101158783A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329047B (en) * | 2008-07-22 | 2010-06-09 | 友达光电股份有限公司 | Light source module, LCD device |
| CN101750796B (en) * | 2008-12-09 | 2012-12-12 | 乐金显示有限公司 | Liquid crystal display device |
| CN104006307A (en) * | 2013-02-22 | 2014-08-27 | 台达电子工业股份有限公司 | Light-emitting diode system, module and lamp plate |
| CN112235900A (en) * | 2020-09-18 | 2021-01-15 | 哈尔滨冰雪大世界股份有限公司 | Ice and snow landscape high-voltage lamp strip drive control system with self-detection and modularization |
-
2007
- 2007-11-16 CN CNA200710177506XA patent/CN101158783A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329047B (en) * | 2008-07-22 | 2010-06-09 | 友达光电股份有限公司 | Light source module, LCD device |
| CN101750796B (en) * | 2008-12-09 | 2012-12-12 | 乐金显示有限公司 | Liquid crystal display device |
| CN104006307A (en) * | 2013-02-22 | 2014-08-27 | 台达电子工业股份有限公司 | Light-emitting diode system, module and lamp plate |
| CN104006307B (en) * | 2013-02-22 | 2016-06-22 | 台达电子工业股份有限公司 | Light-emitting diode system and light-emitting diode (LED) module |
| CN112235900A (en) * | 2020-09-18 | 2021-01-15 | 哈尔滨冰雪大世界股份有限公司 | Ice and snow landscape high-voltage lamp strip drive control system with self-detection and modularization |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8289267B2 (en) | Backlight assembly and display apparatus having the same | |
| CN100430795C (en) | Light emitting diode backlight unit and liquid crystal display device using the same | |
| CN101324725B (en) | LCD device and backlight device | |
| CN101373579A (en) | Display devices | |
| KR20090009436A (en) | Led backlight | |
| US20100123741A1 (en) | Method of driving a light source, light source apparatus for performing the method and display apparatus having the light source apparatus | |
| CN102804035A (en) | Liquid crystal display device and drive method for same | |
| US20050231978A1 (en) | High efficiency low power LED backlighting system for liquid crystal display | |
| CN109215587A (en) | A kind of display device, driving method and electronic equipment | |
| WO2012022066A1 (en) | Led back light module | |
| KR101438583B1 (en) | Blacklight unit and display device including the same | |
| CN101158783A (en) | Back light device | |
| US20150179111A1 (en) | Liquid crystal display device as well as backlight source and dimming method for the same | |
| KR101090751B1 (en) | LCD with a back-light assembly | |
| WO2011043094A1 (en) | Lighting device and display device | |
| CN102878477A (en) | Backlight unit and display apparatus using the same | |
| CN201748359U (en) | Direct type light-emitting diode (LED) backlight source device | |
| US9482808B2 (en) | Display device with backlight module having white and monochromatic LEDs | |
| CN201297595Y (en) | Back light source of a video display device | |
| CN101464593B (en) | Light source device and LCD device using the same | |
| CN201314530Y (en) | LED backlight plate with good color mixing and light intensity balance | |
| CN101467489A (en) | Illumination device | |
| CN103995391A (en) | Liquid crystal display and manufacturing method thereof | |
| CN2881705Y (en) | Improved structure of light source of backlight module | |
| CN2763841Y (en) | Lcd |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |