CN101308628A - 背光单元、显示装置以及电子系统 - Google Patents
背光单元、显示装置以及电子系统 Download PDFInfo
- Publication number
- CN101308628A CN101308628A CNA2008100942604A CN200810094260A CN101308628A CN 101308628 A CN101308628 A CN 101308628A CN A2008100942604 A CNA2008100942604 A CN A2008100942604A CN 200810094260 A CN200810094260 A CN 200810094260A CN 101308628 A CN101308628 A CN 101308628A
- Authority
- CN
- China
- Prior art keywords
- back light
- pulse width
- signal
- node
- switching signal
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000000052 comparative effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/38—Switched mode power supply [SMPS] using boost topology
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Dc-Dc Converters (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
- Control Of El Displays (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/748,027 | 2007-05-14 | ||
US11/748,027 US7531971B2 (en) | 2007-05-14 | 2007-05-14 | Backlight units and display devices |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101308628A true CN101308628A (zh) | 2008-11-19 |
CN101308628B CN101308628B (zh) | 2012-07-18 |
Family
ID=40026837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2008100942604A Expired - Fee Related CN101308628B (zh) | 2007-05-14 | 2008-04-24 | 背光单元、显示装置以及电子系统 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7531971B2 (zh) |
CN (1) | CN101308628B (zh) |
TW (1) | TWI402804B (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103198799A (zh) * | 2013-03-20 | 2013-07-10 | 深圳市华星光电技术有限公司 | 背光驱动板以及液晶显示器 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI364014B (en) * | 2007-04-10 | 2012-05-11 | Novatek Microelectronics Corp | Method and device capable of controlling soft-start dymatically |
JP5169134B2 (ja) * | 2007-10-22 | 2013-03-27 | 船井電機株式会社 | バックライト用led駆動回路 |
DE102009009535A1 (de) * | 2009-02-18 | 2010-08-19 | Osram Gesellschaft mit beschränkter Haftung | Schaltung zur Ansteuerung eines Betriebsgeräts für eine Lichtanwendung, Betriebsgerät und Verfahren zum Betrieb der Schaltung |
KR101476858B1 (ko) * | 2009-10-08 | 2014-12-26 | 엘지디스플레이 주식회사 | 액정표시장치 |
WO2013021320A1 (en) * | 2011-08-08 | 2013-02-14 | Koninklijke Philips Electronics N.V. | Led light source with reduced flicker |
DK2823691T3 (da) * | 2012-03-09 | 2019-07-15 | Signify Holding Bv | Led-lyskilde |
TWI466080B (zh) * | 2012-12-10 | 2014-12-21 | Novatek Microelectronics Corp | 背光模組及切換方法 |
CN103295538B (zh) * | 2013-07-02 | 2015-03-04 | 深圳市华星光电技术有限公司 | 背光驱动电路及减少背光驱动电路软启动时间的方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2596662Y (zh) * | 2003-01-08 | 2003-12-31 | 协欣电子工业股份有限公司 | 直流转交流转换器 |
KR100471161B1 (ko) * | 2003-05-28 | 2005-03-14 | 삼성전기주식회사 | 자기 보호기능을 갖는 lcd 패널용 백라이트 인버터 |
JP4163079B2 (ja) * | 2003-09-12 | 2008-10-08 | ローム株式会社 | 発光制御回路 |
JP4308158B2 (ja) * | 2004-03-30 | 2009-08-05 | ローム株式会社 | 昇圧制御装置およびそれを用いた電子装置 |
WO2006018923A1 (ja) * | 2004-08-17 | 2006-02-23 | Rohm Co., Ltd | 電源装置 |
JP5025913B2 (ja) * | 2005-05-13 | 2012-09-12 | シャープ株式会社 | Led駆動回路、led照明装置およびバックライト |
CN2819617Y (zh) * | 2005-08-13 | 2006-09-20 | 海信集团有限公司 | 直流升压电源电路 |
CN2838200Y (zh) * | 2005-11-02 | 2006-11-15 | 比亚迪股份有限公司 | 一种升压型白色led驱动器 |
US7872430B2 (en) * | 2005-11-18 | 2011-01-18 | Cree, Inc. | Solid state lighting panels with variable voltage boost current sources |
US7656103B2 (en) * | 2006-01-20 | 2010-02-02 | Exclara, Inc. | Impedance matching circuit for current regulation of solid state lighting |
CN100492845C (zh) * | 2006-02-28 | 2009-05-27 | 哈尔滨工业大学 | 一种三开关单级升降压型逆变器 |
KR100691628B1 (ko) * | 2006-04-07 | 2007-03-12 | 삼성전기주식회사 | Led 어레이 구동 장치 |
US20070268236A1 (en) * | 2006-05-17 | 2007-11-22 | Neil Morrow | Methods and systems for LCD backlight color control |
US20070273681A1 (en) * | 2006-05-24 | 2007-11-29 | Mayell Robert J | Method and apparatus to power light emitting diode arrays |
TW200816608A (en) * | 2006-09-26 | 2008-04-01 | Beyond Innovation Tech Co Ltd | DC/DC converter |
US7868603B2 (en) * | 2006-10-04 | 2011-01-11 | Microsemi Corporation | Method and apparatus to compensate for supply voltage variations in a PWM-based voltage regulator |
US20080100224A1 (en) * | 2006-10-31 | 2008-05-01 | Felder Matthew D | System on a chip with backlight controller |
-
2007
- 2007-05-14 US US11/748,027 patent/US7531971B2/en not_active Expired - Fee Related
-
2008
- 2008-04-14 TW TW097113459A patent/TWI402804B/zh not_active IP Right Cessation
- 2008-04-24 CN CN2008100942604A patent/CN101308628B/zh not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103198799A (zh) * | 2013-03-20 | 2013-07-10 | 深圳市华星光电技术有限公司 | 背光驱动板以及液晶显示器 |
CN103198799B (zh) * | 2013-03-20 | 2015-11-25 | 深圳市华星光电技术有限公司 | 背光驱动板以及液晶显示器 |
Also Published As
Publication number | Publication date |
---|---|
TWI402804B (zh) | 2013-07-21 |
US7531971B2 (en) | 2009-05-12 |
US20080284349A1 (en) | 2008-11-20 |
CN101308628B (zh) | 2012-07-18 |
TW200844958A (en) | 2008-11-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101308628B (zh) | 背光单元、显示装置以及电子系统 | |
US7557520B2 (en) | Light source driving circuit | |
CN109994065B (zh) | 供电装置以及包括供电装置的显示装置 | |
US7622871B2 (en) | Light emitting diode driver circuit with shunt switch | |
US20080136771A1 (en) | Backlight control circuit with primary and secondary switch units | |
US7724219B2 (en) | Circuit and method of effectively enhancing drive control of light-emitting diodes | |
KR100945205B1 (ko) | 발광소자 구동 장치 및 그들을 이용한 휴대 장치 | |
JP4689377B2 (ja) | 降圧型スイッチングレギュレータおよびその制御回路ならびにそれを用いた電子機器 | |
TW200541196A (en) | Boost circuit capable of step-up ratio control | |
US7741787B2 (en) | Light-emitting diode driving circuit | |
US8779684B2 (en) | High gate voltage generator and display module including the same | |
KR20240003745A (ko) | 구동 회로, 표시 모듈 및 표시 장치 | |
CN102821511A (zh) | Led驱动电路 | |
US7385402B2 (en) | Light source current sensing circuit and driving circuit in a display device | |
US8106901B2 (en) | Power circuit and liquid crystal display device using same | |
CN102968960A (zh) | Led驱动器装置、lcd和驱动led背光单元的方法 | |
CN101170850A (zh) | 光源驱动电路 | |
US10993306B2 (en) | Light emission control device, light source device, and projection-type video display apparatus | |
US20090261757A1 (en) | Backlight driving circuit and driving method thereof | |
US20140375930A1 (en) | Driver for Driving LED Backlight Source, LED Backlight Source and LCD Device | |
CN103929846A (zh) | 发光二极管负载驱动装置 | |
EP1983638A2 (en) | Output current pumping circuit and remote controller using the same | |
US20090295305A1 (en) | Led driver circuit | |
JP2011258797A (ja) | 発光ダイオードの駆動制御回路およびバックライト照明装置 | |
US20250087172A1 (en) | Display device and driving circuit thereof, and driving method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
ASS | Succession or assignment of patent right |
Owner name: QIMEI ELECTRONIC CO LTD Free format text: FORMER OWNER: TONGBAO OPTOELECTRONICS CO., LTD. Effective date: 20120601 |
|
C41 | Transfer of patent application or patent right or utility model | ||
TA01 | Transfer of patent application right |
Effective date of registration: 20120601 Address after: Miaoli County, Taiwan, China Applicant after: Chimei Optoelectronics Co., Ltd. Address before: Hsinchu science industry zone, Taiwan, China Applicant before: Tongbao Optoelectronics Co., Ltd. |
|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 Termination date: 20180424 |
|
CF01 | Termination of patent right due to non-payment of annual fee |