CA2463697A1 - Liquid crystal display and calibration method therefor - Google Patents

Liquid crystal display and calibration method therefor Download PDF

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Publication number
CA2463697A1
CA2463697A1 CA002463697A CA2463697A CA2463697A1 CA 2463697 A1 CA2463697 A1 CA 2463697A1 CA 002463697 A CA002463697 A CA 002463697A CA 2463697 A CA2463697 A CA 2463697A CA 2463697 A1 CA2463697 A1 CA 2463697A1
Authority
CA
Canada
Prior art keywords
liquid crystal
crystal display
calibration method
method therefor
photodetector
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.)
Granted
Application number
CA002463697A
Other languages
French (fr)
Other versions
CA2463697C (en
Inventor
Mitsuo Ohashi
Katsue Ueda
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.)
Eizo Nanao Corp
Original Assignee
Spectratech Inc.
Mitsuo Ohashi
Katsue Ueda
Eizo Nanao Corporation
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 Spectratech Inc., Mitsuo Ohashi, Katsue Ueda, Eizo Nanao Corporation filed Critical Spectratech Inc.
Publication of CA2463697A1 publication Critical patent/CA2463697A1/en
Application granted granted Critical
Publication of CA2463697C publication Critical patent/CA2463697C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F2203/00Function characteristic
    • G02F2203/69Arrangements or methods for testing or calibrating a device
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0693Calibration of display systems
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

Abstract

The quantity of light from a backlight is monitored by a first photodetector, and the environment on the part of a user is monitored by a second photodetector disposed in the rear of a liquid crystal panel, not on the front thereof. It is possible to exclude the influence of external light from the user side on the first photodetector which detects the quantity of light from the backlight.
CA002463697A 2001-10-16 2001-10-16 Liquid crystal display and calibration method therefor Expired - Fee Related CA2463697C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/009062 WO2003034131A1 (en) 2001-10-16 2001-10-16 Liquid crystal display and its correcting method

Publications (2)

Publication Number Publication Date
CA2463697A1 true CA2463697A1 (en) 2003-04-24
CA2463697C CA2463697C (en) 2007-12-04

Family

ID=11737836

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002463697A Expired - Fee Related CA2463697C (en) 2001-10-16 2001-10-16 Liquid crystal display and calibration method therefor

Country Status (6)

Country Link
US (2) US7068333B2 (en)
EP (1) EP1445643B1 (en)
JP (1) JP3982700B2 (en)
KR (1) KR100588262B1 (en)
CA (1) CA2463697C (en)
WO (1) WO2003034131A1 (en)

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EP1505567A1 (en) * 2003-08-05 2005-02-09 Research In Motion Limited Method for automatic backlight adjustment

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JP4955262B2 (en) * 2004-12-07 2012-06-20 サムスン エレクトロニクス カンパニー リミテッド Illuminance control device for liquid crystal display device, light sensing element, and backlight source
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JP2009503572A (en) * 2005-07-25 2009-01-29 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Thin film circuit having a transistor with a light-shielding body
KR20070017695A (en) * 2005-08-08 2007-02-13 삼성전자주식회사 Display device and driving method thereof
KR20080075862A (en) * 2005-12-13 2008-08-19 코닌클리케 필립스 일렉트로닉스 엔.브이. Display devices with ambient light sensing
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WO2007149682A2 (en) * 2006-05-25 2007-12-27 I2Ic Corporation Energy efficient transflective display
JP4208015B2 (en) * 2006-07-05 2009-01-14 エプソンイメージングデバイス株式会社 Light receiving device, liquid crystal device, and electronic device
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JP2009288465A (en) 2008-05-29 2009-12-10 Funai Electric Co Ltd Back light apparatus and liquid crystal display apparatus
US8487913B2 (en) * 2009-01-09 2013-07-16 Sharp Kabushiki Kaisha Area sensor, liquid crystal display unit, and position detection method
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JP2010281915A (en) * 2009-06-03 2010-12-16 Sony Corp Liquid crystal display device, and method and program for controlling backlight
CN101957692B (en) * 2009-07-17 2013-08-21 鸿富锦精密工业(深圳)有限公司 Touch device and handwriting input system
TWI450139B (en) * 2009-08-11 2014-08-21 Hon Hai Prec Ind Co Ltd Touch-control device and hand-writing input system
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KR102342627B1 (en) * 2014-09-26 2021-12-22 가부시키가이샤 한도오따이 에네루기 켄큐쇼 Matrix device, and drive method and properties measurement method for same
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Also Published As

Publication number Publication date
KR100588262B1 (en) 2006-06-12
EP1445643B1 (en) 2006-09-06
US20040246434A1 (en) 2004-12-09
EP1445643A4 (en) 2005-09-14
JPWO2003034131A1 (en) 2005-02-03
EP1445643A1 (en) 2004-08-11
WO2003034131A1 (en) 2003-04-24
JP3982700B2 (en) 2007-09-26
US7068333B2 (en) 2006-06-27
KR20040054724A (en) 2004-06-25
US20060181673A1 (en) 2006-08-17
CA2463697C (en) 2007-12-04

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EEER Examination request
MKLA Lapsed