TW200734744A - Variable brightness of the back light module and method for controlling the brightness of back light module - Google Patents

Variable brightness of the back light module and method for controlling the brightness of back light module

Info

Publication number
TW200734744A
TW200734744A TW095108004A TW95108004A TW200734744A TW 200734744 A TW200734744 A TW 200734744A TW 095108004 A TW095108004 A TW 095108004A TW 95108004 A TW95108004 A TW 95108004A TW 200734744 A TW200734744 A TW 200734744A
Authority
TW
Taiwan
Prior art keywords
back light
light module
alternation
brightness
driver
Prior art date
Application number
TW095108004A
Other languages
Chinese (zh)
Other versions
TWI331241B (en
Inventor
Wen-Chung Lee
Original Assignee
Chi Mei Optoelectronics 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 Chi Mei Optoelectronics Corp filed Critical Chi Mei Optoelectronics Corp
Priority to TW95108004A priority Critical patent/TWI331241B/en
Publication of TW200734744A publication Critical patent/TW200734744A/en
Application granted granted Critical
Publication of TWI331241B publication Critical patent/TWI331241B/en

Links

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

A variable brightness of the back light module includes: a CV/CC alternation driver, a switch, at least one of LEDs, a sensor resistance and a controller. The CV/CC alternation driver is sequentially connected to the switch, at least one of LEDs, and the sensor resistance in series, while the sensor resistance is also connected to the CV/CC alternation driver electrically. The controller simultaneously controls the CV/CC alternation driver and the switch. When the controller closes the switch, the CV/CC alternation driver shifts to CC (Constant Current) mode. However, when the controller opens the switch, the CV/CC alternation driver shifts to CV(Constant Voltage) mode.
TW95108004A 2006-03-09 2006-03-09 Variable brightness of the back light module and method for controlling the brightness of back light module TWI331241B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW95108004A TWI331241B (en) 2006-03-09 2006-03-09 Variable brightness of the back light module and method for controlling the brightness of back light module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW95108004A TWI331241B (en) 2006-03-09 2006-03-09 Variable brightness of the back light module and method for controlling the brightness of back light module

Publications (2)

Publication Number Publication Date
TW200734744A true TW200734744A (en) 2007-09-16
TWI331241B TWI331241B (en) 2010-10-01

Family

ID=45074636

Family Applications (1)

Application Number Title Priority Date Filing Date
TW95108004A TWI331241B (en) 2006-03-09 2006-03-09 Variable brightness of the back light module and method for controlling the brightness of back light module

Country Status (1)

Country Link
TW (1) TWI331241B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI400000B (en) * 2008-08-11 2013-06-21 Ultrachip Inc Brightness-enhancement driving apparatus for led array
CN103220845A (en) * 2012-01-20 2013-07-24 朗捷科技股份有限公司 Alternating current LED drive circuit capable of adjusting working voltage range
TWI498046B (en) * 2007-12-21 2015-08-21 Niko Semiconductor Co Ltd A led driving circuit and a secondary side controller thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI498046B (en) * 2007-12-21 2015-08-21 Niko Semiconductor Co Ltd A led driving circuit and a secondary side controller thereof
TWI400000B (en) * 2008-08-11 2013-06-21 Ultrachip Inc Brightness-enhancement driving apparatus for led array
CN103220845A (en) * 2012-01-20 2013-07-24 朗捷科技股份有限公司 Alternating current LED drive circuit capable of adjusting working voltage range

Also Published As

Publication number Publication date
TWI331241B (en) 2010-10-01

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Legal Events

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