ATE170358T1 - Beleuchtungssteuerung einer rückwärtigen beleuchtung für eine lcd-anlage - Google Patents

Beleuchtungssteuerung einer rückwärtigen beleuchtung für eine lcd-anlage

Info

Publication number
ATE170358T1
ATE170358T1 AT93304030T AT93304030T ATE170358T1 AT E170358 T1 ATE170358 T1 AT E170358T1 AT 93304030 T AT93304030 T AT 93304030T AT 93304030 T AT93304030 T AT 93304030T AT E170358 T1 ATE170358 T1 AT E170358T1
Authority
AT
Austria
Prior art keywords
lamp
intensity
lighting
current
light
Prior art date
Application number
AT93304030T
Other languages
English (en)
Inventor
Nathan A Mitchell
Philip J Mckenzie
Original Assignee
Compaq Computer 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 Compaq Computer Corp filed Critical Compaq Computer Corp
Application granted granted Critical
Publication of ATE170358T1 publication Critical patent/ATE170358T1/de

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
    • H05B41/3922—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations and measurement of the incident light
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0606—Manual adjustment
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Liquid Crystal (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Liquid Crystal Display Device Control (AREA)
AT93304030T 1992-05-26 1993-05-25 Beleuchtungssteuerung einer rückwärtigen beleuchtung für eine lcd-anlage ATE170358T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/888,914 US5272327A (en) 1992-05-26 1992-05-26 Constant brightness liquid crystal display backlight control system

Publications (1)

Publication Number Publication Date
ATE170358T1 true ATE170358T1 (de) 1998-09-15

Family

ID=25394158

Family Applications (1)

Application Number Title Priority Date Filing Date
AT93304030T ATE170358T1 (de) 1992-05-26 1993-05-25 Beleuchtungssteuerung einer rückwärtigen beleuchtung für eine lcd-anlage

Country Status (5)

Country Link
US (1) US5272327A (de)
EP (1) EP0572207B1 (de)
AT (1) ATE170358T1 (de)
CA (1) CA2096929A1 (de)
DE (1) DE69320536T2 (de)

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AT407461B (de) * 1996-04-24 2001-03-26 Kurz Martin Ansteuerung für entladungslampe
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US5661645A (en) 1996-06-27 1997-08-26 Hochstein; Peter A. Power supply for light emitting diode array
JP3398734B2 (ja) * 1997-04-04 2003-04-21 シャープ株式会社 液晶バックライト駆動用インバータ回路
DE59812414D1 (de) 1997-04-24 2005-01-27 Siemens Ag Schaltungsanordnung zum dimmbaren betrieb einer leuchtstofflampe
DE19733939A1 (de) * 1997-08-06 1999-02-11 Mannesmann Vdo Ag Schaltungsanordnung zum dimmbaren Betrieb einer Leuchtstofflampe
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US6151008A (en) * 1997-08-01 2000-11-21 Compaq Computer Corporation Method and apparatus for controlling the brightness of a display screen
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WO1999023456A1 (en) * 1997-10-30 1999-05-14 Baker Electronics, Inc. Consistent brightness backlight system
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US7740371B1 (en) 1998-03-19 2010-06-22 Charles A. Lemaire Method and apparatus for pulsed L.E.D. illumination for a camera
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JP3047885B2 (ja) * 1998-04-09 2000-06-05 日本電気株式会社 バックライト制御装置およびバックライト制御方法
DE19853657A1 (de) * 1998-11-20 2000-05-31 Vogt Electronic Ag Vorschaltgerät für fluoreszierende Kaltkathodenlampen (CCFL)
US6252355B1 (en) * 1998-12-31 2001-06-26 Honeywell International Inc. Methods and apparatus for controlling the intensity and/or efficiency of a fluorescent lamp
JP3932406B2 (ja) * 1999-08-20 2007-06-20 ミネベア株式会社 冷陰極放電ランプ点灯回路
JP3496589B2 (ja) * 1999-09-21 2004-02-16 日本電気株式会社 情報処理装置
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US6624593B2 (en) * 2001-10-08 2003-09-23 Randall D. Blanchard Dimmable ballast for electrodeless fluorescent lamps
KR100723742B1 (ko) * 2002-01-14 2007-05-30 엘지전자 주식회사 시스템내 발열을 이용한 엘시디 밝기 제어 장치 및 그 방법
KR100840933B1 (ko) * 2002-01-31 2008-06-24 삼성전자주식회사 램프 구동 장치 및 이를 갖는 액정 표시 장치
US6841947B2 (en) * 2002-05-14 2005-01-11 Garmin At, Inc. Systems and methods for controlling brightness of an avionics display
CN1302688C (zh) * 2002-05-15 2007-02-28 神达电脑股份有限公司 背光控制装置
TW588563B (en) * 2002-07-01 2004-05-21 Chuntex Electronic Co Ltd Brightness adjustment method and device of liquid crystal display
KR100919717B1 (ko) * 2002-08-19 2009-10-06 페어차일드코리아반도체 주식회사 인버터 구동 장치 및 그 방법
TW560664U (en) * 2002-11-20 2003-11-01 Gigno Technology Co Ltd Digital controlled multi-light driving apparatus
US7928956B2 (en) * 2002-11-20 2011-04-19 Gigno Technology Co., Ltd. Digital controlled multi-light driving apparatus and driving-control method for driving and controlling lights
US7872431B2 (en) * 2002-11-20 2011-01-18 Gigno Technology Co., Ltd. Digital controlled multi-light driving apparatus
US7095392B2 (en) * 2003-02-07 2006-08-22 02Micro International Limited Inverter controller with automatic brightness adjustment circuitry
TW200512713A (en) * 2003-09-16 2005-04-01 Beyond Innovation Tech Co Ltd PWM illumination control circuit with low visual noise
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CN101727831B (zh) * 2008-10-10 2012-01-18 华映视讯（吴江）有限公司 背光模组的驱动电路及其方法
CN105913812A (zh) * 2016-06-30 2016-08-31 宇龙计算机通信科技(深圳)有限公司 一种调节终端lcd背光亮度的方法、装置以及终端

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Also Published As

Publication number Publication date
CA2096929A1 (en) 1993-11-27
US5272327A (en) 1993-12-21
EP0572207A2 (de) 1993-12-01
DE69320536D1 (de) 1998-10-01
EP0572207B1 (de) 1998-08-26
EP0572207A3 (de) 1994-01-05
DE69320536T2 (de) 1999-01-14

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Legal Events

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RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties