HK83596A - Process and device for dimming a fluorescent lamp of an lcd backlight - Google Patents

Process and device for dimming a fluorescent lamp of an lcd backlight

Info

Publication number
HK83596A
HK83596A HK83596A HK83596A HK83596A HK 83596 A HK83596 A HK 83596A HK 83596 A HK83596 A HK 83596A HK 83596 A HK83596 A HK 83596A HK 83596 A HK83596 A HK 83596A
Authority
HK
Hong Kong
Prior art keywords
dimming
fluorescent lamp
lcd backlight
backlight
lcd
Prior art date
Application number
HK83596A
Other languages
English (en)
Inventor
Georges Lavaud
Jean-Pierre Bouron
Original Assignee
Thomson Csf
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 Thomson Csf filed Critical Thomson Csf
Publication of HK83596A publication Critical patent/HK83596A/xx

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
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/04—Dimming circuit for fluorescent lamps

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Inverter Devices (AREA)
HK83596A 1989-06-30 1996-05-09 Process and device for dimming a fluorescent lamp of an lcd backlight HK83596A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8908807A FR2649277B1 (fr) 1989-06-30 1989-06-30 Procede et dispositif de gradation de lumiere pour lampe fluorescente d'eclairage arriere d'ecran a cristaux liquides

Publications (1)

Publication Number Publication Date
HK83596A true HK83596A (en) 1996-05-17

Family

ID=9383336

Family Applications (1)

Application Number Title Priority Date Filing Date
HK83596A HK83596A (en) 1989-06-30 1996-05-09 Process and device for dimming a fluorescent lamp of an lcd backlight

Country Status (7)

Country Link
US (1) US5105127A (xx)
EP (1) EP0406116B1 (xx)
JP (1) JPH0364895A (xx)
CA (1) CA2019628A1 (xx)
DE (1) DE69006272T2 (xx)
FR (1) FR2649277B1 (xx)
HK (1) HK83596A (xx)

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Also Published As

Publication number Publication date
FR2649277A1 (fr) 1991-01-04
JPH0364895A (ja) 1991-03-20
EP0406116B1 (fr) 1994-01-26
FR2649277B1 (fr) 1996-05-31
DE69006272D1 (de) 1994-03-10
CA2019628A1 (en) 1990-12-31
DE69006272T2 (de) 1994-05-05
EP0406116A1 (fr) 1991-01-02
US5105127A (en) 1992-04-14

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