TW200719296A - Drive circuit for a light emitting diode array - Google Patents

Drive circuit for a light emitting diode array

Info

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
Application number
TW094139314A
Other languages
Chinese (zh)
Inventor
Chia-Hung Tsen
Feng-Rurng Juang
Original Assignee
Aimtron Technology Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aimtron Technology Corp filed Critical Aimtron Technology Corp
Priority to TW094139314A priority Critical patent/TW200719296A/en
Publication of TW200719296A publication Critical patent/TW200719296A/en

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  • 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.
TW094139314A 2005-11-09 2005-11-09 Drive circuit for a light emitting diode array TW200719296A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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