DK1044588T3 - Fremgangsmåde og apparat til deampning af en lampe i et baggrundslys på en LCD-skærm - Google Patents

Fremgangsmåde og apparat til deampning af en lampe i et baggrundslys på en LCD-skærm

Info

Publication number
DK1044588T3
DK1044588T3 DK98958647T DK98958647T DK1044588T3 DK 1044588 T3 DK1044588 T3 DK 1044588T3 DK 98958647 T DK98958647 T DK 98958647T DK 98958647 T DK98958647 T DK 98958647T DK 1044588 T3 DK1044588 T3 DK 1044588T3
Authority
DK
Denmark
Prior art keywords
dimming
backlight
lamp
lcd screen
lcd
Prior art date
Application number
DK98958647T
Other languages
English (en)
Inventor
Michael R Praiswater
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Application granted granted Critical
Publication of DK1044588T3 publication Critical patent/DK1044588T3/da

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
    • 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
DK98958647T 1997-12-24 1998-11-20 Fremgangsmåde og apparat til deampning af en lampe i et baggrundslys på en LCD-skærm DK1044588T3 (da)

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
DK1044588T3 true DK1044588T3 (da) 2002-12-02

Family

ID=25544774

Family Applications (1)

Application Number Title Priority Date Filing Date
DK98958647T DK1044588T3 (da) 1997-12-24 1998-11-20 Fremgangsmåde og apparat til deampning af en lampe i et baggrundslys på en LCD-skærm

Country Status (9)

Country Link
US (1) US5939830A (da)
EP (1) EP1044588B1 (da)
JP (1) JP4249900B2 (da)
KR (1) KR100580850B1 (da)
DE (1) DE69807751T2 (da)
DK (1) DK1044588T3 (da)
IL (2) IL136975A0 (da)
TW (1) TW431122B (da)
WO (1) WO1999034651A1 (da)

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Also Published As

Publication number Publication date
WO1999034651A1 (en) 1999-07-08
IL136975A0 (en) 2001-06-14
EP1044588A1 (en) 2000-10-18
TW431122B (en) 2001-04-21
DE69807751D1 (de) 2002-10-10
KR20010033591A (ko) 2001-04-25
JP4249900B2 (ja) 2009-04-08
US5939830A (en) 1999-08-17
IL136975A (en) 2006-07-05
KR100580850B1 (ko) 2006-05-16
JP2002500427A (ja) 2002-01-08
DE69807751T2 (de) 2003-06-05
EP1044588B1 (en) 2002-09-04

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