TW200943249A - A driving circuit for making LED backlight source uniform - Google Patents
A driving circuit for making LED backlight source uniformInfo
- Publication number
- TW200943249A TW200943249A TW97113639A TW97113639A TW200943249A TW 200943249 A TW200943249 A TW 200943249A TW 97113639 A TW97113639 A TW 97113639A TW 97113639 A TW97113639 A TW 97113639A TW 200943249 A TW200943249 A TW 200943249A
- Authority
- TW
- Taiwan
- Prior art keywords
- led
- driving circuit
- different
- control circuit
- selection switches
- Prior art date
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
This invention relates to a driving circuit for making LED backlight source uniform, which at least includes one current control circuit, one or more sets of LED arrays and a plurality of selection switches. A plurality of LEDs are connected in series to form a plurality of LED arrays, and the LED arrays are connected to the current control circuit in parallel, in which selection switches are equipped at different sections between the loops of series-connected LED arrays and the parallel-connected current control circuit. The selection switches can create different current paths in a random manner. Different current paths correspond to different forward voltages so that each LED will have different forward current variation and the corresponding intensity when the driving circuit is switched on the loop. The switching is performed at a frequency beyond that of the persistence of vision of human, enabling the LED to generate flash at nearly the maximum random changing rate for achieving the efficacies of making mixed-light uniform and lowering the LED sorting and binning cost.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW97113639A TWI391888B (en) | 2008-04-15 | 2008-04-15 | LED backlight uniform drive circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW97113639A TWI391888B (en) | 2008-04-15 | 2008-04-15 | LED backlight uniform drive circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200943249A true TW200943249A (en) | 2009-10-16 |
TWI391888B TWI391888B (en) | 2013-04-01 |
Family
ID=44868980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW97113639A TWI391888B (en) | 2008-04-15 | 2008-04-15 | LED backlight uniform drive circuit |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI391888B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112634818A (en) * | 2020-12-23 | 2021-04-09 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method and display device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200719296A (en) * | 2005-11-09 | 2007-05-16 | Aimtron Technology Corp | Drive circuit for a light emitting diode array |
US7731377B2 (en) * | 2006-03-21 | 2010-06-08 | Semiconductor Energy Laboratory Co., Ltd. | Backlight device and display device |
KR100679410B1 (en) * | 2006-04-04 | 2007-02-06 | 엘지.필립스 엘시디 주식회사 | Device for driving light emitting diode |
-
2008
- 2008-04-15 TW TW97113639A patent/TWI391888B/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112634818A (en) * | 2020-12-23 | 2021-04-09 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method and display device |
CN112634818B (en) * | 2020-12-23 | 2022-07-29 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method and display device |
Also Published As
Publication number | Publication date |
---|---|
TWI391888B (en) | 2013-04-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |