TW200706064A - Dimming control circuit for light-emitting diodes - Google Patents

Dimming control circuit for light-emitting diodes

Info

Publication number
TW200706064A
TW200706064A TW094124313A TW94124313A TW200706064A TW 200706064 A TW200706064 A TW 200706064A TW 094124313 A TW094124313 A TW 094124313A TW 94124313 A TW94124313 A TW 94124313A TW 200706064 A TW200706064 A TW 200706064A
Authority
TW
Taiwan
Prior art keywords
dimming control
light
control circuit
emitting diodes
bright
Prior art date
Application number
TW094124313A
Other languages
Chinese (zh)
Other versions
TWI259030B (en
Inventor
Rong-Chin Lee
Li-Cheng Chen
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 TW94124313A priority Critical patent/TWI259030B/en
Application granted granted Critical
Publication of TWI259030B publication Critical patent/TWI259030B/en
Publication of TW200706064A publication Critical patent/TW200706064A/en

Links

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)

Abstract

A dimming control circuit generates a dimming control signal for determining brightness of at least one light-emitting diode. The dimming control signal has a plurality of bright-dark cycles, each of which consists of a bright phase and a dark phase. The bright phase starts with an adaptive rising portion. The adaptive rising portion restricts the brightness of the at least one light-emitting diode to increase gradually from zero.
TW94124313A 2005-07-19 2005-07-19 Dimming control circuit for light-emitting diodes TWI259030B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94124313A TWI259030B (en) 2005-07-19 2005-07-19 Dimming control circuit for light-emitting diodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94124313A TWI259030B (en) 2005-07-19 2005-07-19 Dimming control circuit for light-emitting diodes

Publications (2)

Publication Number Publication Date
TWI259030B TWI259030B (en) 2006-07-21
TW200706064A true TW200706064A (en) 2007-02-01

Family

ID=37765466

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94124313A TWI259030B (en) 2005-07-19 2005-07-19 Dimming control circuit for light-emitting diodes

Country Status (1)

Country Link
TW (1) TWI259030B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI452925B (en) * 2011-06-30 2014-09-11 Hannstar Display Corp Control circuit and dimming method of light emitting diode

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7504783B2 (en) * 2007-03-23 2009-03-17 National Semiconductor Corporation Circuit for driving and monitoring an LED
TWI406589B (en) * 2008-10-28 2013-08-21 Ind Tech Res Inst Control circuit and method for backlight sources, and image display apparatus and lighting apparatus using the same
TWI411357B (en) * 2008-12-19 2013-10-01 Himax Analogic Inc Led circuit with high dimming frequency
TWI425878B (en) * 2009-05-08 2014-02-01 My Semi Inc Driving circuit of light emitting diode
TWI418252B (en) * 2009-08-17 2013-12-01 Novatek Microelectronics Corp Control method capable of avoiding flicker effect and light emitting device
US8269432B2 (en) * 2009-09-14 2012-09-18 System General Corporation Offline LED lighting circuit with dimming control
TWI413454B (en) * 2010-05-26 2013-10-21 Au Optronics Corp Dc to dc converting system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI452925B (en) * 2011-06-30 2014-09-11 Hannstar Display Corp Control circuit and dimming method of light emitting diode

Also Published As

Publication number Publication date
TWI259030B (en) 2006-07-21

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees