CA2519967C - Methode permettant de maintenir dans le temps le point de couleur blanche d'un affichage a cristaux liquides par sequence de trames - Google Patents

Methode permettant de maintenir dans le temps le point de couleur blanche d'un affichage a cristaux liquides par sequence de trames Download PDF

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Publication number
CA2519967C
CA2519967C CA2519967A CA2519967A CA2519967C CA 2519967 C CA2519967 C CA 2519967C CA 2519967 A CA2519967 A CA 2519967A CA 2519967 A CA2519967 A CA 2519967A CA 2519967 C CA2519967 C CA 2519967C
Authority
CA
Canada
Prior art keywords
light emitting
display
value
colour
pixel
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CA2519967A
Other languages
English (en)
Other versions
CA2519967A1 (fr
Inventor
Marc Drader
James Robinson
Jerry Mailloux
Robert Lowles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
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 Research in Motion Ltd filed Critical Research in Motion Ltd
Publication of CA2519967A1 publication Critical patent/CA2519967A1/fr
Application granted granted Critical
Publication of CA2519967C publication Critical patent/CA2519967C/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • G09G3/3413—Details of control of colour illumination 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

Landscapes

  • Engineering & Computer Science (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)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

Un affichage à cristaux liquides par séquence de trames maintient son point de couleur blanche pendant les valeurs de compensation à au moins une diode électroluminescente colorée qui illumine l'affichage. Les valeurs de compensation peuvent être des impédances pour contrôler le courant ou pulser la source de courant selon une technique de modulation de largeur d'impulsion. Une courbe de dégradation peut être utilisée pour calculer l'extrapolation de la tension directe théorique de la diode électroluminescente. Une complexité supplémentaire survient de la nécessité de calculer le temps de disponibilité de multiples diodes électroluminescentes de différentes couleurs. Les niveaux de luminosité peuvent aussi être pris en compte.
CA2519967A 2004-10-05 2005-09-16 Methode permettant de maintenir dans le temps le point de couleur blanche d'un affichage a cristaux liquides par sequence de trames Active CA2519967C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20040104887 EP1646033A1 (fr) 2004-10-05 2004-10-05 Procédé pour maintenir le point blanc pendant le temps d'utilisation dans un dispositif d'affichage à cristaux liquides à séquence de trames couleur
EP04104887.7 2004-10-05

Publications (2)

Publication Number Publication Date
CA2519967A1 CA2519967A1 (fr) 2006-04-05
CA2519967C true CA2519967C (fr) 2012-11-27

Family

ID=34929664

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2519967A Active CA2519967C (fr) 2004-10-05 2005-09-16 Methode permettant de maintenir dans le temps le point de couleur blanche d'un affichage a cristaux liquides par sequence de trames

Country Status (2)

Country Link
EP (1) EP1646033A1 (fr)
CA (1) CA2519967C (fr)

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455576A (en) 1981-04-07 1984-06-19 Seiko Instruments & Electronics Ltd. Picture display device
US4975692A (en) 1987-12-26 1990-12-04 Canon Kabushiki Kaisha Apparatus for driving electroluminescence panel
US5440208A (en) * 1993-10-29 1995-08-08 Motorola, Inc. Driver circuit for electroluminescent panel
JPH1063225A (ja) 1996-08-19 1998-03-06 Citizen Watch Co Ltd 表示装置
JP3645375B2 (ja) 1996-11-05 2005-05-11 シチズン時計株式会社 表示装置及びその駆動方法
US5920298A (en) 1996-12-19 1999-07-06 Colorado Microdisplay, Inc. Display system having common electrode modulation
US6344641B1 (en) * 1999-08-11 2002-02-05 Agilent Technologies, Inc. System and method for on-chip calibration of illumination sources for an integrated circuit display
JP2001056670A (ja) 1999-08-17 2001-02-27 Seiko Instruments Inc 自発光表示素子駆動装置
US7227519B1 (en) 1999-10-04 2007-06-05 Matsushita Electric Industrial Co., Ltd. Method of driving display panel, luminance correction device for display panel, and driving device for display panel
JP2002006796A (ja) * 2000-06-23 2002-01-11 Fujitsu General Ltd 表示装置
US7053874B2 (en) * 2000-09-08 2006-05-30 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and driving method thereof
FI109632B (fi) * 2000-11-06 2002-09-13 Nokia Corp Valkoinen valaisu
US7088334B2 (en) 2001-06-28 2006-08-08 Matsushita Electric Industrial Co., Ltd. Liquid crystal display device and manufacturing method thereof, and drive control method of lighting unit
JP3917845B2 (ja) 2001-11-16 2007-05-23 シャープ株式会社 液晶表示装置
JP3636136B2 (ja) * 2001-12-25 2005-04-06 株式会社アドバンスト・ディスプレイ 液晶表示素子
KR20030066420A (ko) * 2002-02-01 2003-08-09 세이코 엡슨 가부시키가이샤 전기 광학 장치, 그 구동 방법, 및 전자기기
KR20040023551A (ko) * 2002-09-11 2004-03-18 옵트렉스 가부시키가이샤 복합 표시 장치 및 그 구동 방법
JP4423848B2 (ja) * 2002-10-31 2010-03-03 ソニー株式会社 画像表示装置、および、その色バランス調整方法

Also Published As

Publication number Publication date
EP1646033A1 (fr) 2006-04-12
CA2519967A1 (fr) 2006-04-05

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