CN200947143Y - LED grouping all parallel backlight module for TFT-LCD large scale TV - Google Patents
LED grouping all parallel backlight module for TFT-LCD large scale TV Download PDFInfo
- Publication number
- CN200947143Y CN200947143Y CN 200620120892 CN200620120892U CN200947143Y CN 200947143 Y CN200947143 Y CN 200947143Y CN 200620120892 CN200620120892 CN 200620120892 CN 200620120892 U CN200620120892 U CN 200620120892U CN 200947143 Y CN200947143 Y CN 200947143Y
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- led
- module backlight
- large scale
- lcd
- parallel
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Abstract
The utility model relates to a backlight module which is used for a large size television liquid crystal display (LCD) and connected with a light-emitting diode (LED) grouping in the overall and shunt way. The utility model comprises a circuit board used to fix the LED and a connecting wire, a plurality of LEDs and a light guide heat dissipation material, a dispersing board and a light guide scattering material; wherein, the LEDs in the same color group are connected in the overall shunt way. When some LEDs are damaged, yet the brightness and chrominance of the utility model can not be severely influenced, thus the service life of the utility model can be prolonged.
Description
Technical field
The utility model provides a kind of LED grouping full module backlight in parallel, is mainly used in large scale TV LCD (LCD).Be brightness and chroma stability, the module backlight that can increase the service life.
Background technology
Module backlight is the assembly that light source is provided to LCD (LCD), is one of its key component, has been widely used in all many-sides such as mobile phone, digital camera, video camera, computer display screen, flat-surface television, plane outdoor advertising at present.Module backlight is arranged at the below of display screen, with provide evenly disperse and the light of certain brightness to display screen, form the colour picture of different brightness, different color and different gray scales by the pixel electrode on the control display screen.
Fig. 1 is known module backlight three looks (R, G, B) led circuit connection diagrams.
As shown in Figure 1, module backlight commonly used all is to divide three looks to connect red (R), green (G), blue (B) LED.Press the size of steady current, it is in parallel that every kind of color LED is divided into the m group; And every group be composed in series by n sheet LED by magnitude of voltage.
Because of the otherness of led indicator parameter, so the serviceable life of each series connection group LED is then by the poorest a slice LED decision of quality in this series connection group.If wherein a slice LED lost efficacy, then whole LED of this series connection group will not work, and in large scale TV LCD (LCD), can cause the brightness of part or a slice to be subjected to very big influence especially, and chromaticity coordinates is the off-design value also.Shortened the serviceable life of module backlight significantly.
Summary of the invention
The purpose of this utility model is to provide a kind of TFT-LCD large scale TV with the full module backlight in parallel of LED grouping, with red (R), green (G), blue (B) three-color LED module backlight as light source, be used in particular in the large scale TV LCD (LCD), each series connection group is if having indivedual LED because of certain reason lost efficacy, and the brightness that can not cause the LED-backlit module significantly, large tracts of land descends and the colourity substantial deviation.The serviceable life of each series connection group LED of module backlight, can't help the poorest a slice LED decision of quality in this series connection group, can prolong module backlight serviceable life significantly.
To achieve these goals, the utility model provides a kind of TFT-LCD large scale TV with the full module backlight in parallel of LED grouping, is used for large scale TV LCD, and comprising: circuit board is fixed with LED and line on it; Some LED that light source is provided are fixed on the described circuit board; Offer the via hole that at least one is used for discharging heat that module backlight produces at the LED periphery on the circuit board; The leaded light heat sink material is poured into LED and goes up sealing LED, and discharges the heat that LED produces by via hole; Light guide plate places between leaded light heat sink material and the diffuser plate, and the light scattering that LED is produced is to diffuser plate; Diffuser plate places on the light guide plate, and the light scattering that LED produces is exported; Wherein, take full parallel way to connect between each LED with colour cell.
Further preferred version of the present utility model is that this module backlight is down straight aphototropism mode set or side-light type module backlight.
Further preferred version of the present utility model is that this module backlight also includes shell, places with the upper module outside, and is coated with upper module, and circuit board, diffuser plate, light guide plate and leaded light scattering material are fixed.
Further preferred version of the present utility model is that the material of described shell is a metal.
Above-mentioned and additional features, advantage of the present utility model can further be understood by the detailed description below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is known three-color LED backlight source module connection diagram;
Fig. 2 is the utility model LED-backlit source module diagrammatic cross-section;
Fig. 3 is the utility model LED-backlit source module connection diagram.
Description of reference numerals: circuit board 10; Via hole 11; LED 20; Leaded light heat sink material 30; Light guide plate 40; Diffuser plate 50; Shell 60.
Embodiment
With reference to figure two is the diagrammatic cross-section of first embodiment of the present utility model.The utility model provides a kind of down straight aphototropism mode set of LED dispersed arrangement, comprising: one is used for fixing the circuit board 10 that LED and line are used, several light emitting diodes (LED) 20; Have a via hole 11 near each LED 20 on the circuit board at least, perfusion leaded light heat sink material 30 on LED 20 with the LED sealing, and is communicated with perfusion leaded light heat sink material 30 in 11 and is beneficial to heat radiation with shell 60.Light guide plate 40 and diffuser plate 50 place leaded light heat sink material 30 upper ends, all are fixed on the shell 60.Light guide plate 40 places between leaded light heat sink material 30 and the diffuser plate 50, and the light scattering that LED 20 is produced is to diffuser plate 50; Diffuser plate 50 places on the light guide plate 40, and the light scattering that LED 20 produces is exported.Shell 60 is to place with the upper module outside, and is coated with upper module, and circuit board 10, diffuser plate 50, leaded light heat sink material 30 and light guide plate 40 is fixing.
Generally speaking, with reference to Fig. 3, module backlight of the present utility model is made up of red (R), green (G), blue (B) three-color LED.Every kind of color is formed in parallel by m group LED series connection group, every series connection group by n spare LED series connection (as D11, D12, D13 ..., D1 (n-1), D1n) form.The full connected mode in parallel of corresponding LED employing between every series connection group (as D11, D21 ..., Dm1 is in parallel entirely).Composition is by the LED matrix of the capable parallel connection of m, the series connection of n row.Because of the indivedual LED of certain reason lost efficacy, the brightness that can not cause the LED-backlit module significantly, large tracts of land descends and the colourity substantial deviation.The serviceable life of each series connection group of module backlight, can't help the poorest a slice LED decision of quality in this series connection group, then can prolong module backlight serviceable life significantly.
If by the circuit side connector case of known module backlight, because of certain reason D21 lost efficacy, then whole LED of m2 group (D21, D22, D23 ..., D2n) all will not work.And in the utility model scheme, if because of certain reason D21 lost efficacy, the D11 in parallel with it ..., Dm1 can both to other LED of this series connection group (D22, D23 ..., D2n) power path is provided, except that D21 lost efficacy, remaining LED is unaffected, so the brightness that can not cause the LED-backlit module significantly, large tracts of land descends and the colourity substantial deviation, the serviceable life of each series connection group LED of module backlight, can't help the poorest a slice LED decision of quality in this series connection group, then can prolong module backlight and large scale TV LCD (LCD) serviceable life significantly
Be to be understood that, below explanation in conjunction with the embodiments is for the utility model illustrative and nonrestrictive just, in not breaking away from spirit and scope of the present utility model, can make many changes and modification to the utility model, it all will drop in the scope of the present utility model defined by the claims.
Claims (4)
1. a TFT-LCD large scale TV is used for large scale TV LCD with the full module backlight in parallel of LED grouping, it is characterized in that, comprising:
Circuit board is fixed with LED and line on it;
Some LED that light source is provided are fixed on the described circuit board;
Offer the via hole that at least one is used for discharging heat that module backlight produces at the LED periphery on the circuit board;
The leaded light heat sink material is poured into LED and goes up sealing LED, and discharges the heat that LED produces by via hole;
Light guide plate places between leaded light heat sink material and the diffuser plate, and the light scattering that LED is produced is to diffuser plate;
Diffuser plate places on the light guide plate, and the light scattering that LED produces is exported;
Wherein, take full parallel way to connect between each LED with colour cell.
2. TFT-LCD large scale TV as claimed in claim 1 is with the full module backlight in parallel of LED grouping, and it is characterized in that: this module backlight is down straight aphototropism mode set or side-light type module backlight.
3. TFT-LCD large scale TV as claimed in claim 1 is with the full module backlight in parallel of LED grouping, it is characterized in that: this module backlight also includes shell, place with the upper module outside, and be coated with upper module, circuit board, diffuser plate, light guide plate and leaded light scattering material are fixed.
4. TFT-LCD large scale TV as claimed in claim 3 is with the full module backlight in parallel of LED grouping, and it is characterized in that: the material of described shell is a metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620120892 CN200947143Y (en) | 2006-07-11 | 2006-07-11 | LED grouping all parallel backlight module for TFT-LCD large scale TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620120892 CN200947143Y (en) | 2006-07-11 | 2006-07-11 | LED grouping all parallel backlight module for TFT-LCD large scale TV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200947143Y true CN200947143Y (en) | 2007-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620120892 Expired - Lifetime CN200947143Y (en) | 2006-07-11 | 2006-07-11 | LED grouping all parallel backlight module for TFT-LCD large scale TV |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200947143Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477774A (en) * | 2009-02-05 | 2009-07-08 | 北京巨数数字技术开发有限公司 | LED screen manufacturing process, display screen box, display screen and display screen system |
| RU2473835C2 (en) * | 2008-07-29 | 2013-01-27 | Шарп Кабусики Кайся | Lighting device, display device and tv receiver |
| CN106647041A (en) * | 2017-03-09 | 2017-05-10 | 烟台北方星空自控科技有限公司 | Display having large-size liquid crystal matrix type LED backlight |
-
2006
- 2006-07-11 CN CN 200620120892 patent/CN200947143Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2473835C2 (en) * | 2008-07-29 | 2013-01-27 | Шарп Кабусики Кайся | Lighting device, display device and tv receiver |
| US8556455B2 (en) | 2008-07-29 | 2013-10-15 | Sharp Kabushiki Kaisha | Lighting device, display device and television receiver |
| CN101477774A (en) * | 2009-02-05 | 2009-07-08 | 北京巨数数字技术开发有限公司 | LED screen manufacturing process, display screen box, display screen and display screen system |
| CN106647041A (en) * | 2017-03-09 | 2017-05-10 | 烟台北方星空自控科技有限公司 | Display having large-size liquid crystal matrix type LED backlight |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: DIHAO ELECTRONIC (YANGZHOU) CO., LTD. Assignor: Diguang Electronic Co., Ltd., Shenzhen Contract fulfillment period: 2009.8.11 to 2014.8.10 Contract record no.: 2009320001567 Denomination of utility model: LED group fully parallel backlight module for TFT-LCD large size television Granted publication date: 20070912 License type: Exclusive license Record date: 20090818 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.8.11 TO 2014.8.10; CHANGE OF CONTRACT Name of requester: DIHAO ELECTRONICS( YANGZHOU ) CO., LTD. Effective date: 20090818 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070912 |
|
| EXPY | Termination of patent right or utility model |