Liquid crystal projector


PURPOSE: To offer a liquid crystal projector which can obtain a video having a correct color without being influenced by the color of a projected surface by providing a correcting means for correcting the shade of the video projected according to the color of the projected surface. CONSTITUTION: A correcting switch 10 is operated to be turned on in a state where the video based on a normal video signal is projected on the projected surface 6, a controlling signal is outputted from a correcting and switching circuit 9 and a sensor 7 and a correcting circuit 8 become an action state, and also a video switching circuit 3 is switched to the state where a reference white signal is outputted instead of the normal video signal, then the video is enlarged and projected to the projected surface 6 by a projecting part 5 through a video outputting circuit 4. And the reference white signal from the sensor 7 and the reference white signal from a reference signal generating circuit 2 obtained by receiving projected light from the projecting part 5 and reflected at the projected surface 6 are compared each other at the correcting circuit 8, the correcting signal according to the compared result is outputted to the video outputting circuit 4. COPYRIGHT: (C)1992,JPO&Japio




Download Full PDF Version (Non-Commercial Use)

Patent Citations (0)

    Publication numberPublication dateAssigneeTitle

NO-Patent Citations (0)


Cited By (14)

    Publication numberPublication dateAssigneeTitle
    JP-2006109380-AApril 20, 2006Sharp Corp, シャープ株式会社Projection image color adjusting method and projector
    JP-2006140839-AJune 01, 2006Sharp Corp, シャープ株式会社プロジェクタ
    JP-2006251140-ASeptember 21, 2006Matsushita Electric Ind Co Ltd, 松下電器産業株式会社投写装置
    JP-2007322671-ADecember 13, 2007Research Organization Of Information & Systems, Univ Of Tokyo, 国立大学法人 東京大学, 大学共同利用機関法人情報・システム研究機構Projection image correction system and correction information generation program
    JP-2011013443-AJanuary 20, 2011Canon Inc, キヤノン株式会社Image display device, control method thereof, and program thereof
    US-6990234-B2January 24, 2006Seiko Epson CorporationCorrection curve generating method, image processing method, image display unit, and storage medium
    US-7079155-B2July 18, 2006Seiko Epson CorporationImage display device, image processing method, program, and storage medium
    US-7110002-B2September 19, 2006Seiko Epson CorporationImage displaying system of environment-adaptive type, presentation system, and image processing method and program
    US-7170634-B2January 30, 2007Seiko Epson CorporationPicture display system, picture data processing method, and program for performing color correction of output pictures
    US-7284867-B2October 23, 2007Funai Electric Co., Ltd.Projector
    US-7542055-B2June 02, 2009Seiko Epson CorporationImage display system, projector, information storage medium, and image processing method
    US-7595811-B2September 29, 2009Seiko Epson CorporationEnvironment-complaint image display system, projector, and program
    US-7986332-B2July 26, 2011Seiko Epson CorporationEnvironment-compliant image display system, projector, and program
    WO-02097784-A1December 05, 2002Seiko Epson CorporationSysteme de visualisation d'images, projecteur, support d'informations, et procede de traitement d'images