投写型プロジェクタの台形歪み補正装置

Trapezoidal distortion correcting apparatus for projection type projector

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display device capable of correcting a trapezoidal distortion of an image projected on a screen and also superimposing/displaying superimposed OSD on a trapezoidal distortion correction screen. <P>SOLUTION: The trapezoidal distortion correcting apparatus for a projection type projector is comprised of: an inclination sensor 15 for a main body of a projector 30; a scaler section 13 for converting an angle of view of video according to an input video signal; an arithmetic section 16 for operating a correction value of angle-of-view conversion due to the scaler section in order to correct a trapezoidal distortion of a projection screen onto the screen caused by an inclination of the main body of the projector; a trapezoidal distortion correcting section 17 for displaying a trapezoidal distortion correction screen on a liquid crystal panel using a video signal to which angle-of-view conversion is applied by the scaler section, using the correction value of angle-of-view conversion operated by this arithmetic section; and an on-screen display superimposing section 19 for performing on-screen display at a position on the screen of the least correction in the trapezoidal distortion correction screen due to the trapezoidal distortion correcting section. <P>COPYRIGHT: (C)2006,JPO&NCIPI
【課題】 スクリーンの画面の台形歪み補正と、重畳表示されるOSDを台形歪み補正画面に重畳表示可能な投写型プロジェクタの台形歪み補正装置。 【解決手段】 プロジェクタ30本体の傾きセンサー15、入力映像信号による映像の画角変換を行うスケーラ部13、プロジェクタ本体の傾きに起因するスクリーンへの投写画面の台形歪みを補正するためにスケーラ部による画角変換の補正値を演算する演算部16、この演算部にて演算された画角変換の補正値にてスケーラ部で画角変換された映像信号により台形歪み補正画面を液晶パネルに表示させる台形歪み補正部17、この台形歪み補正部による台形歪み補正画面の最も補正の少ない画面上の位置にオンスクリーン表示を行わせるようにしたオンスクリーン表示重畳部19からなり投写型プロジェクタの台形歪み補正装置。 【選択図】 図1

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Cited By (5)

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    US-8840252-B2September 23, 2014Panasonic CorporationImage display apparatus and portable information processing apparatus having the same
    US-9224321-B2December 29, 2015Seiko Epson CorporationProjector for performing trapezoidal distortion correction and method of controlling projector