JP4173007B2 - 投影表示装置用のｌｅｄ光源を駆動する方法および装置 - Google Patents

投影表示装置用のｌｅｄ光源を駆動する方法および装置 Download PDF

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Publication number
JP4173007B2
JP4173007B2 JP2002578278A JP2002578278A JP4173007B2 JP 4173007 B2 JP4173007 B2 JP 4173007B2 JP 2002578278 A JP2002578278 A JP 2002578278A JP 2002578278 A JP2002578278 A JP 2002578278A JP 4173007 B2 JP4173007 B2 JP 4173007B2
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Prior art keywords
leds
light
circuit
led
current
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Expired - Lifetime
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Japanese (ja)
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JP2004533111A (ja
JP2004533111A5 (enExample
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パーカー，フレデリック・エス
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インフォーカス・コーポレーション
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3164—Modulator illumination systems using multiple light sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display
    • 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

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Projection Apparatus (AREA)
  • Semiconductor Lasers (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
JP2002578278A 2001-03-30 2002-03-14 投影表示装置用のｌｅｄ光源を駆動する方法および装置 Expired - Lifetime JP4173007B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/823,448 US7088321B1 (en) 2001-03-30 2001-03-30 Method and apparatus for driving LED light sources for a projection display
PCT/US2002/008064 WO2002080136A1 (en) 2001-03-30 2002-03-14 Method and apparatus for driving led light sources for a projection display

Publications (3)

Publication Number Publication Date
JP2004533111A JP2004533111A (ja) 2004-10-28
JP2004533111A5 JP2004533111A5 (enExample) 2005-11-17
JP4173007B2 true JP4173007B2 (ja) 2008-10-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002578278A Expired - Lifetime JP4173007B2 (ja) 2001-03-30 2002-03-14 投影表示装置用のｌｅｄ光源を駆動する方法および装置

Country Status (4)

Country Link
US (1) US7088321B1 (enExample)
EP (1) EP1397792A4 (enExample)
JP (1) JP4173007B2 (enExample)
WO (1) WO2002080136A1 (enExample)

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Also Published As

Publication number Publication date
US7088321B1 (en) 2006-08-08
EP1397792A4 (en) 2008-03-12
EP1397792A1 (en) 2004-03-17
WO2002080136A1 (en) 2002-10-10
JP2004533111A (ja) 2004-10-28

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