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FI107844B - Förfarande för att reglera färgtemperatur av en bakbelyst flytkristallskärm och en bakbelyst flytkristallskärm - Google Patents

Förfarande för att reglera färgtemperatur av en bakbelyst flytkristallskärm och en bakbelyst flytkristallskärm Download PDF

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Publication number
FI107844B
FI107844B FI974167A FI974167A FI107844B FI 107844 B FI107844 B FI 107844B FI 974167 A FI974167 A FI 974167A FI 974167 A FI974167 A FI 974167A FI 107844 B FI107844 B FI 107844B
Authority
FI
Finland
Prior art keywords
color temperature
liquid crystal
lamps
crystal display
lamp
Prior art date
Application number
FI974167A
Other languages
English (en)
Finnish (fi)
Other versions
FI974167A0 (fi
FI974167L (sv
Inventor
Kimmo Siitari
Original Assignee
Nokia Display Products Oy
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 Nokia Display Products Oy filed Critical Nokia Display Products Oy
Priority to FI974167A priority Critical patent/FI107844B/sv
Publication of FI974167A0 publication Critical patent/FI974167A0/fi
Priority to EP98660113A priority patent/EP0915363A3/en
Priority to US09/187,638 priority patent/US6213615B1/en
Publication of FI974167L publication Critical patent/FI974167L/sv
Application granted granted Critical
Publication of FI107844B publication Critical patent/FI107844B/sv

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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
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
    • 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
    • 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
    • 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
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude 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

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Claims (8)

1. Förfarande för att reglera fargtemperaturen pä en bakgrundsbelyst flytkristall-skärm i belyst omgivning, där belysningens temperatur är väsentligen inom interval-len 5000 - 10 000 K, kännetecknat av att flytkristalltavlan belyses med tva eller fle- 5 ra fondbelysningslampor med olika fargtemperatur för att utvidga regleromrädet för fargtemperaturen.
2. Förfarande enligt patentkrav 1, kännetecknat av att fondbelysningslampoma med olika fargtemperatur kopplas (7, 9) skilt för att ställa in bildskärmens fargtemperatur (8). 10
3. Förfarande enligt patentkrav 1, kännetecknat av att ljusintensiteten hos fond belysningslampoma med olika fargtemperatur regleras skilt för att ställa in fargtemperaturen (8).
4. Förfarande enligt patentkrav 1, 2 eller 3, kännetecknat av att ljuset frän fondbelysningslampoma överförs med en fotoledare tili flytkristallskärmen.
5. Bakgrundsbelyst flytkristallskärm, innefattande ett arrangemang för att reglera fargtemperaturen i belyst omgivning, där belysningens fargtemperatur är väsentligen inom intervallen 5000 - 10 000 K, kännetecknad av att den innefattar tvä eller flera fondbelysningslampor (LAMPI, 2, 3, 4, 5) med olika fargtemperatur för bakgrunds-belysning av flytkristalltavlan (4) och en avbrytare (SI) för att tända fondbelys- : *·· 20 ningslampor (LAMPI, 2, 3, 4, 5) med olika fargtemperatur.
• · · • · · • « · ·;··: 6. Flytkristallskärm enligt patentkrav 5, kännetecknad av att avbrytaren är en • · · strömställare (SI).
···· • · • · • · · *·:·. 7. Flytkristallskärm enligt patentkrav 5, kännetecknad av att avbrytaren är en • · · reglerare med konstant tillständ som möjliggör kontinuerlig regiering, frän päkopp- 25 ling av den lainpa (LAMPI) som har lägsta fargtemperatur till päkoppling av den lainpa (LAMP5) som har högsta fargtemperatur, sä att den totala ljusintensiteten ···' hälls väsentligen konstant.
• · · ···· .·**. 8. Flytkristallskärm enligt patentkrav 5, 6 eller 7, kännetecknad av att den dess- ·. utöm innefattar en fotoledare (3) för att överföra ljus frän fondbelysningslampoma ♦··· 30 (LAMPI, 2, 3, 4, 5) tili flytkristallskärmen. • · • · ··♦
FI974167A 1997-11-07 1997-11-07 Förfarande för att reglera färgtemperatur av en bakbelyst flytkristallskärm och en bakbelyst flytkristallskärm FI107844B (sv)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI974167A FI107844B (sv) 1997-11-07 1997-11-07 Förfarande för att reglera färgtemperatur av en bakbelyst flytkristallskärm och en bakbelyst flytkristallskärm
EP98660113A EP0915363A3 (en) 1997-11-07 1998-11-04 A method for adjusting the colour temperature in a back-lit liquid crystal display
US09/187,638 US6213615B1 (en) 1997-11-07 1998-11-06 Method for adjusting the color temperature in a back-lit liquid crystal display and a back-lit liquid crystal display

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI974167A FI107844B (sv) 1997-11-07 1997-11-07 Förfarande för att reglera färgtemperatur av en bakbelyst flytkristallskärm och en bakbelyst flytkristallskärm
FI974167 1997-11-07

Publications (3)

Publication Number Publication Date
FI974167A0 FI974167A0 (fi) 1997-11-07
FI974167L FI974167L (sv) 1999-05-08
FI107844B true FI107844B (sv) 2001-10-15

Family

ID=8549896

Family Applications (1)

Application Number Title Priority Date Filing Date
FI974167A FI107844B (sv) 1997-11-07 1997-11-07 Förfarande för att reglera färgtemperatur av en bakbelyst flytkristallskärm och en bakbelyst flytkristallskärm

Country Status (3)

Country Link
US (1) US6213615B1 (sv)
EP (1) EP0915363A3 (sv)
FI (1) FI107844B (sv)

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US6611249B1 (en) 1998-07-22 2003-08-26 Silicon Graphics, Inc. System and method for providing a wide aspect ratio flat panel display monitor independent white-balance adjustment and gamma correction capabilities
EP1610593B2 (en) 1999-11-18 2020-02-19 Signify North America Corporation Generation of white light with Light Emitting Diodes having different spectrum
TW528169U (en) * 2000-05-04 2003-04-11 Koninkl Philips Electronics Nv Assembly of a display device and an illumination system
TWI240241B (en) * 2000-05-04 2005-09-21 Koninkl Philips Electronics Nv Assembly of a display device and an illumination system
CN1213335C (zh) * 2001-02-19 2005-08-03 皇家菲利浦电子有限公司 照明系统和显示装置
EP1619648A4 (en) * 2003-03-28 2008-08-06 Sharp Kk DISPLAY DEVICE
US20060077148A1 (en) * 2004-09-27 2006-04-13 Gally Brian J Method and device for manipulating color in a display
US7525730B2 (en) * 2004-09-27 2009-04-28 Idc, Llc Method and device for generating white in an interferometric modulator display
US7911428B2 (en) * 2004-09-27 2011-03-22 Qualcomm Mems Technologies, Inc. Method and device for manipulating color in a display
US8102407B2 (en) * 2004-09-27 2012-01-24 Qualcomm Mems Technologies, Inc. Method and device for manipulating color in a display
US7710632B2 (en) 2004-09-27 2010-05-04 Qualcomm Mems Technologies, Inc. Display device having an array of spatial light modulators with integrated color filters
US20060066557A1 (en) * 2004-09-27 2006-03-30 Floyd Philip D Method and device for reflective display with time sequential color illumination
US8362987B2 (en) * 2004-09-27 2013-01-29 Qualcomm Mems Technologies, Inc. Method and device for manipulating color in a display
US8031133B2 (en) * 2004-09-27 2011-10-04 Qualcomm Mems Technologies, Inc. Method and device for manipulating color in a display
DE102004047766C5 (de) * 2004-09-30 2014-02-27 Osram Opto Semiconductors Gmbh Beleuchtungseinrichtung
US8004743B2 (en) * 2006-04-21 2011-08-23 Qualcomm Mems Technologies, Inc. Method and apparatus for providing brightness control in an interferometric modulator (IMOD) display
EP2490211A3 (en) 2006-09-26 2014-05-14 Sharp Kabushiki Kaisha Liquid crystal display device
US20100188443A1 (en) * 2007-01-19 2010-07-29 Pixtronix, Inc Sensor-based feedback for display apparatus
CN101678208B (zh) 2007-05-25 2013-07-17 皇家飞利浦电子股份有限公司 用于创建生物效应的照明系统
US7911442B2 (en) * 2007-08-27 2011-03-22 Au Optronics Corporation Dynamic color gamut of LED backlight
US8848294B2 (en) 2010-05-20 2014-09-30 Qualcomm Mems Technologies, Inc. Method and structure capable of changing color saturation
US20130088152A1 (en) * 2011-03-31 2013-04-11 B-K Lighting, Inc. Dimming apparatus for solid state lighting fixtures
US8749538B2 (en) 2011-10-21 2014-06-10 Qualcomm Mems Technologies, Inc. Device and method of controlling brightness of a display based on ambient lighting conditions
US9183812B2 (en) 2013-01-29 2015-11-10 Pixtronix, Inc. Ambient light aware display apparatus
CN104930411B (zh) * 2015-06-30 2017-10-10 京东方科技集团股份有限公司 一种背光源模组
JP6459895B2 (ja) * 2015-10-16 2019-01-30 株式会社デンソー 液晶表示装置
CN105405414A (zh) * 2016-01-06 2016-03-16 京东方科技集团股份有限公司 背光源及其控制方法、显示装置
CN106652921A (zh) * 2016-12-26 2017-05-10 武汉华星光电技术有限公司 一种显示系统、背光模组及显示设备
CN112382242B (zh) * 2020-11-13 2022-10-04 深圳Tcl新技术有限公司 色温调整方法、装置、终端设备及计算机可读存储介质

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Also Published As

Publication number Publication date
FI974167A0 (fi) 1997-11-07
EP0915363A3 (en) 1999-07-28
FI974167L (sv) 1999-05-08
EP0915363A2 (en) 1999-05-12
US6213615B1 (en) 2001-04-10

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