TW200719296A - Drive circuit for a light emitting diode array - Google Patents
Drive circuit for a light emitting diode arrayInfo
- Publication number
- TW200719296A TW200719296A TW094139314A TW94139314A TW200719296A TW 200719296 A TW200719296 A TW 200719296A TW 094139314 A TW094139314 A TW 094139314A TW 94139314 A TW94139314 A TW 94139314A TW 200719296 A TW200719296 A TW 200719296A
- Authority
- TW
- Taiwan
- Prior art keywords
- voltage
- light emitting
- emitting diode
- diode array
- current
- Prior art date
Links
Landscapes
- Led Devices (AREA)
Abstract
A voltage regulator supplies an output voltage to a light emitting diode array. A current regulator has a plurality of current regulation terminals, correspondingly coupled to a plurality of constituting branches of the light emitting diode array, for controlling a plurality of currents respectively flowing through the plurality of constituting branches. An activation circuit causes the output voltage to increase until each voltage at the current regulation terminals exceeds a reference voltage, thereby ensuring that each of the plurality of currents reaches a regulation current. Afterwards, a selection circuit selects a minimum voltage from all of the voltages at the current regulation terminals to serve as a feedback control signal for controlling the voltage regulator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW094139314A TW200719296A (en) | 2005-11-09 | 2005-11-09 | Drive circuit for a light emitting diode array |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW094139314A TW200719296A (en) | 2005-11-09 | 2005-11-09 | Drive circuit for a light emitting diode array |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200719296A true TW200719296A (en) | 2007-05-16 |
Family
ID=57911943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW094139314A TW200719296A (en) | 2005-11-09 | 2005-11-09 | Drive circuit for a light emitting diode array |
Country Status (1)
Country | Link |
---|---|
TW (1) | TW200719296A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI391888B (en) * | 2008-04-15 | 2013-04-01 | Radiant Opto Electronics Corp | LED backlight uniform drive circuit |
TWI397034B (en) * | 2008-10-29 | 2013-05-21 | Richtek Technology Corp | Current regulator for improving the efficiency of led display system and method thereof |
US8487538B2 (en) | 2010-12-21 | 2013-07-16 | Au Optronics Corp. | Driving power control circuit for light emitting diode and method thereof |
TWI419608B (en) * | 2010-12-07 | 2013-12-11 | Power Forest Technology Corp | Light emitting diode driving apparatus |
-
2005
- 2005-11-09 TW TW094139314A patent/TW200719296A/en unknown
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI391888B (en) * | 2008-04-15 | 2013-04-01 | Radiant Opto Electronics Corp | LED backlight uniform drive circuit |
TWI397034B (en) * | 2008-10-29 | 2013-05-21 | Richtek Technology Corp | Current regulator for improving the efficiency of led display system and method thereof |
TWI419608B (en) * | 2010-12-07 | 2013-12-11 | Power Forest Technology Corp | Light emitting diode driving apparatus |
US8742689B2 (en) | 2010-12-07 | 2014-06-03 | Power Forest Technology Corporation | Light emitting diode driving apparatus |
US8487538B2 (en) | 2010-12-21 | 2013-07-16 | Au Optronics Corp. | Driving power control circuit for light emitting diode and method thereof |
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