IL136975A0 - Method and apparatus for dimming a lamp in a backlight of a liquid crystal display - Google Patents
Method and apparatus for dimming a lamp in a backlight of a liquid crystal displayInfo
- Publication number
- IL136975A0 IL136975A0 IL13697598A IL13697598A IL136975A0 IL 136975 A0 IL136975 A0 IL 136975A0 IL 13697598 A IL13697598 A IL 13697598A IL 13697598 A IL13697598 A IL 13697598A IL 136975 A0 IL136975 A0 IL 136975A0
- Authority
- IL
- Israel
- Prior art keywords
- dimming
- backlight
- lamp
- liquid crystal
- crystal display
- Prior art date
Links
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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
- H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
-
- 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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/998,110 US5939830A (en) | 1997-12-24 | 1997-12-24 | Method and apparatus for dimming a lamp in a backlight of a liquid crystal display |
PCT/US1998/024701 WO1999034651A1 (en) | 1997-12-24 | 1998-11-20 | Method and apparatus for dimming a lamp in a backlight of a liquid crystal display |
Publications (1)
Publication Number | Publication Date |
---|---|
IL136975A0 true IL136975A0 (en) | 2001-06-14 |
Family
ID=25544774
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL13697598A IL136975A0 (en) | 1997-12-24 | 1998-11-20 | Method and apparatus for dimming a lamp in a backlight of a liquid crystal display |
IL136975A IL136975A (en) | 1997-12-24 | 2000-06-25 | Method and device for dimming a backlight lamp in a liquid crystal display |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL136975A IL136975A (en) | 1997-12-24 | 2000-06-25 | Method and device for dimming a backlight lamp in a liquid crystal display |
Country Status (9)
Country | Link |
---|---|
US (1) | US5939830A (de) |
EP (1) | EP1044588B1 (de) |
JP (1) | JP4249900B2 (de) |
KR (1) | KR100580850B1 (de) |
DE (1) | DE69807751T2 (de) |
DK (1) | DK1044588T3 (de) |
IL (2) | IL136975A0 (de) |
TW (1) | TW431122B (de) |
WO (1) | WO1999034651A1 (de) |
Families Citing this family (68)
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JP2000069332A (ja) * | 1998-08-17 | 2000-03-03 | Asahi Optical Co Ltd | 液晶モニタ照明装置及び該液晶モニタ照明装置を用いた液晶モニタ付きデジタルカメラ |
US6114814A (en) * | 1998-12-11 | 2000-09-05 | Monolithic Power Systems, Inc. | Apparatus for controlling a discharge lamp in a backlighted display |
US6900600B2 (en) | 1998-12-11 | 2005-05-31 | Monolithic Power Systems, Inc. | Method for starting a discharge lamp using high energy initial pulse |
US6946806B1 (en) | 2000-06-22 | 2005-09-20 | Microsemi Corporation | Method and apparatus for controlling minimum brightness of a fluorescent lamp |
US6259615B1 (en) | 1999-07-22 | 2001-07-10 | O2 Micro International Limited | High-efficiency adaptive DC/AC converter |
US6804129B2 (en) | 1999-07-22 | 2004-10-12 | 02 Micro International Limited | High-efficiency adaptive DC/AC converter |
US7049761B2 (en) | 2000-02-11 | 2006-05-23 | Altair Engineering, Inc. | Light tube and power supply circuit |
EP1300055B1 (de) | 2000-05-12 | 2006-08-30 | O2 Micro International Limited | Intregrierte schaltung zur lampenerwärmung und dimmersteuerung |
US6570347B2 (en) | 2000-06-01 | 2003-05-27 | Everbrite, Inc. | Gas-discharge lamp having brightness control |
US6307765B1 (en) | 2000-06-22 | 2001-10-23 | Linfinity Microelectronics | Method and apparatus for controlling minimum brightness of a fluorescent lamp |
JP2002123226A (ja) * | 2000-10-12 | 2002-04-26 | Hitachi Ltd | 液晶表示装置 |
US6784867B1 (en) * | 2000-11-16 | 2004-08-31 | Koninklijke Philips Electronics N.V. | Voltage-fed push LLC resonant LCD backlighting inverter circuit |
US6356035B1 (en) * | 2000-11-27 | 2002-03-12 | Philips Electronics North America Corporation | Deep PWM dimmable voltage-fed resonant push-pull inverter circuit for LCD backlighting with a coupled inductor |
US6501234B2 (en) | 2001-01-09 | 2002-12-31 | 02 Micro International Limited | Sequential burst mode activation circuit |
US6570344B2 (en) | 2001-05-07 | 2003-05-27 | O2Micro International Limited | Lamp grounding and leakage current detection system |
CA2447880C (en) * | 2001-05-24 | 2009-04-07 | Fred A. Brown | Stator with multiple winding configurations |
US6670781B2 (en) | 2001-07-27 | 2003-12-30 | Visteon Global Technologies, Inc. | Cold cathode fluorescent lamp low dimming antiflicker control circuit |
US7064740B2 (en) * | 2001-11-09 | 2006-06-20 | Sharp Laboratories Of America, Inc. | Backlit display with improved dynamic range |
US6583568B1 (en) * | 2001-12-19 | 2003-06-24 | Northrop Grumman | Method and apparatus for dimming high-intensity fluorescent lamps |
KR100825099B1 (ko) * | 2001-12-20 | 2008-04-25 | 삼성전자주식회사 | 표시 장치용 백라이트 장치 |
KR100449913B1 (ko) * | 2002-01-24 | 2004-09-22 | 대한민국 | 액정 디스플레이의 백라이트용 멀티램프 점등장치 |
US6841947B2 (en) * | 2002-05-14 | 2005-01-11 | Garmin At, Inc. | Systems and methods for controlling brightness of an avionics display |
US6873322B2 (en) * | 2002-06-07 | 2005-03-29 | 02Micro International Limited | Adaptive LCD power supply circuit |
US6756769B2 (en) | 2002-06-20 | 2004-06-29 | O2Micro International Limited | Enabling circuit for avoiding negative voltage transients |
US6949912B2 (en) | 2002-06-20 | 2005-09-27 | 02Micro International Limited | Enabling circuit for avoiding negative voltage transients |
KR100892584B1 (ko) * | 2002-08-26 | 2009-04-08 | 삼성전자주식회사 | 전원공급장치와 이를 갖는 백라이트 어셈블리 및 액정표시 장치 |
US6778415B2 (en) * | 2003-01-22 | 2004-08-17 | O2Micro, Inc. | Controller electrical power circuit supplying energy to a display device |
US7230613B1 (en) * | 2003-03-03 | 2007-06-12 | Rockwell Collins, Inc. | Display driver supporting a dimming mode |
US7292221B2 (en) | 2003-03-20 | 2007-11-06 | Lg Electronics Inc. | Apparatus and method for controlling inverter pulse width modulation frequency in LCD in portable computer |
US7057611B2 (en) * | 2003-03-25 | 2006-06-06 | 02Micro International Limited | Integrated power supply for an LCD panel |
US6936975B2 (en) | 2003-04-15 | 2005-08-30 | 02Micro International Limited | Power supply for an LCD panel |
US8144106B2 (en) | 2003-04-24 | 2012-03-27 | Samsung Electronics Co., Ltd. | Liquid crystal display and driving method thereof |
KR100866791B1 (ko) * | 2003-04-25 | 2008-11-04 | 삼성전자주식회사 | 액정 판넬 디스플레이 장치 및 그 구동 방법 |
JP3696604B2 (ja) | 2003-05-23 | 2005-09-21 | ローム株式会社 | 直流−交流変換装置、及び交流電力供給方法 |
US6897698B1 (en) | 2003-05-30 | 2005-05-24 | O2Micro International Limited | Phase shifting and PWM driving circuits and methods |
US7187139B2 (en) | 2003-09-09 | 2007-03-06 | Microsemi Corporation | Split phase inverters for CCFL backlight system |
US6919694B2 (en) | 2003-10-02 | 2005-07-19 | Monolithic Power Systems, Inc. | Fixed operating frequency inverter for cold cathode fluorescent lamp having strike frequency adjusted by voltage to current phase relationship |
US7468722B2 (en) | 2004-02-09 | 2008-12-23 | Microsemi Corporation | Method and apparatus to control display brightness with ambient light correction |
WO2005099316A2 (en) | 2004-04-01 | 2005-10-20 | Microsemi Corporation | Full-bridge and half-bridge compatible driver timing schedule for direct drive backlight system |
US7602369B2 (en) | 2004-05-04 | 2009-10-13 | Sharp Laboratories Of America, Inc. | Liquid crystal display with colored backlight |
US7777714B2 (en) | 2004-05-04 | 2010-08-17 | Sharp Laboratories Of America, Inc. | Liquid crystal display with adaptive width |
US8395577B2 (en) | 2004-05-04 | 2013-03-12 | Sharp Laboratories Of America, Inc. | Liquid crystal display with illumination control |
US7872631B2 (en) | 2004-05-04 | 2011-01-18 | Sharp Laboratories Of America, Inc. | Liquid crystal display with temporal black point |
US7755595B2 (en) | 2004-06-07 | 2010-07-13 | Microsemi Corporation | Dual-slope brightness control for transflective displays |
US7898519B2 (en) | 2005-02-17 | 2011-03-01 | Sharp Laboratories Of America, Inc. | Method for overdriving a backlit display |
US7133298B2 (en) * | 2004-10-25 | 2006-11-07 | Texas Instruments Incorporated | High frequency voltage regulating transformer based converter |
JP4884665B2 (ja) | 2004-11-12 | 2012-02-29 | ローム株式会社 | 直流−交流変換装置、そのコントローラic、及び直流−交流変換装置の並行運転システム |
US8050511B2 (en) | 2004-11-16 | 2011-11-01 | Sharp Laboratories Of America, Inc. | High dynamic range images from low dynamic range images |
US8050512B2 (en) | 2004-11-16 | 2011-11-01 | Sharp Laboratories Of America, Inc. | High dynamic range images from low dynamic range images |
US7262561B2 (en) * | 2004-12-13 | 2007-08-28 | Zippy Technology Corp. | Method for controlling power supply through multiple modulation modes |
TW200630668A (en) * | 2005-02-16 | 2006-09-01 | Delta Optoelectronics Inc | Cold cathode flat fluorescent light (CCFFL) and the driving method |
FR2882870B1 (fr) * | 2005-03-01 | 2007-08-10 | Thales Sa | Oscillateur de royer a electronique de decharge |
KR100675224B1 (ko) * | 2005-05-09 | 2007-01-26 | 삼성전기주식회사 | 백라이트용 외부전극 형광램프 인버터의 구동방법 |
US8121401B2 (en) | 2006-01-24 | 2012-02-21 | Sharp Labortories of America, Inc. | Method for reducing enhancement of artifacts and noise in image color enhancement |
US9143657B2 (en) | 2006-01-24 | 2015-09-22 | Sharp Laboratories Of America, Inc. | Color enhancement technique using skin color detection |
KR100791841B1 (ko) * | 2006-03-10 | 2008-01-07 | 삼성전자주식회사 | 프레임 신호에 동기된 백라이트 신호를 발생하기 위한장치와 방법 |
CN101416566A (zh) * | 2006-04-06 | 2009-04-22 | 皇家飞利浦电子股份有限公司 | 用于驱动灯的方法和设备 |
US7569998B2 (en) | 2006-07-06 | 2009-08-04 | Microsemi Corporation | Striking and open lamp regulation for CCFL controller |
US8941580B2 (en) | 2006-11-30 | 2015-01-27 | Sharp Laboratories Of America, Inc. | Liquid crystal display with area adaptive backlight |
US8044558B2 (en) * | 2006-12-13 | 2011-10-25 | Honeywell International Inc. | Dimmable high pressure arc lamp apparatus and methods |
JP2009252410A (ja) * | 2008-04-02 | 2009-10-29 | Ushio Inc | 放電ランプ装置 |
KR100950682B1 (ko) * | 2008-07-24 | 2010-03-31 | 전자부품연구원 | 표시 장치 및 방법 |
TWI403216B (zh) * | 2008-10-14 | 2013-07-21 | Chunghwa Picture Tubes Ltd | 光源亮度控制電路及亮度控制方法 |
US7938562B2 (en) | 2008-10-24 | 2011-05-10 | Altair Engineering, Inc. | Lighting including integral communication apparatus |
US8093839B2 (en) | 2008-11-20 | 2012-01-10 | Microsemi Corporation | Method and apparatus for driving CCFL at low burst duty cycle rates |
CN101854769B (zh) * | 2009-04-02 | 2012-11-28 | 华映视讯(吴江)有限公司 | 光源亮度控制电路及亮度控制方法 |
FR2976150B1 (fr) | 2011-06-01 | 2013-06-14 | Thales Sa | Dispositif de commande de diodes electroluminescentes a tres grande dynamique de luminance pour ecran de visualisation |
WO2015148998A1 (en) * | 2014-03-27 | 2015-10-01 | Integrated Device Technology, Inc. | Wireless power system |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1177111A (en) * | 1982-02-17 | 1984-10-30 | Carl Schweer | Lamp dimmer |
US4682080A (en) * | 1984-08-17 | 1987-07-21 | Hitachi, Ltd. | Discharge lamp operating device |
US4998045A (en) * | 1988-12-06 | 1991-03-05 | Honeywell Inc. | Fluorescent lamp dimmer |
FR2649277B1 (fr) * | 1989-06-30 | 1996-05-31 | Thomson Csf | Procede et dispositif de gradation de lumiere pour lampe fluorescente d'eclairage arriere d'ecran a cristaux liquides |
US5027034A (en) * | 1989-10-12 | 1991-06-25 | Honeywell Inc. | Alternating cathode florescent lamp dimmer |
GB2244608A (en) * | 1990-04-23 | 1991-12-04 | P I Electronics Pte Ltd | High frequency drive circuit for a fluorescent lamp |
US5491387A (en) * | 1992-06-29 | 1996-02-13 | Kansei Corporation | Discharge lamp lighting circuit for increasing electric power fed in initial lighting of the lamp |
US5428265A (en) * | 1994-02-28 | 1995-06-27 | Honeywell, Inc. | Processor controlled fluorescent lamp dimmer for aircraft liquid crystal display instruments |
-
1997
- 1997-12-24 US US08/998,110 patent/US5939830A/en not_active Expired - Lifetime
-
1998
- 1998-11-20 EP EP98958647A patent/EP1044588B1/de not_active Expired - Lifetime
- 1998-11-20 IL IL13697598A patent/IL136975A0/xx active IP Right Grant
- 1998-11-20 JP JP2000527129A patent/JP4249900B2/ja not_active Expired - Fee Related
- 1998-11-20 WO PCT/US1998/024701 patent/WO1999034651A1/en active IP Right Grant
- 1998-11-20 DK DK98958647T patent/DK1044588T3/da active
- 1998-11-20 DE DE69807751T patent/DE69807751T2/de not_active Expired - Fee Related
- 1998-11-20 KR KR1020007007102A patent/KR100580850B1/ko not_active IP Right Cessation
- 1998-12-11 TW TW087120632A patent/TW431122B/zh not_active IP Right Cessation
-
2000
- 2000-06-25 IL IL136975A patent/IL136975A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DK1044588T3 (da) | 2002-12-02 |
DE69807751T2 (de) | 2003-06-05 |
EP1044588B1 (de) | 2002-09-04 |
WO1999034651A1 (en) | 1999-07-08 |
JP2002500427A (ja) | 2002-01-08 |
KR100580850B1 (ko) | 2006-05-16 |
DE69807751D1 (de) | 2002-10-10 |
EP1044588A1 (de) | 2000-10-18 |
IL136975A (en) | 2006-07-05 |
JP4249900B2 (ja) | 2009-04-08 |
TW431122B (en) | 2001-04-21 |
US5939830A (en) | 1999-08-17 |
KR20010033591A (ko) | 2001-04-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FF | Patent granted | ||
KB | Patent renewed | ||
KB | Patent renewed |