PROJECTION DEVICE AND CONTROL METHOD OF THE SAME, AS WELL AS PROJECTION SYSTEM

Japanese Patent JP2017198742

A

PROBLEM TO BE SOLVED: To solve the problem in which, in a projection device having a liquid crystal display element using a PWM drive method, when edge blend processing is performed, an image quality jamming peculiar to the PWM drive method occurs to make a connection part between projection screens due to a multi projection conspicuous.SOLUTION: Each projection device in a multi projection system has: a liquid crystal panel; a drive circuit that implement PWM control of the liquid crystal panel; edge blend processing for a synthesis display by each projection device; and a projection image processing unit 140 that implement switch processing of a gain characteristic of the edge blending processing by each projection device, in which synchronization of each projection device is maintained by a synchronization circuit. Accordingly, a sum of an image gain in a synthesis area of an image by each projection device becomes 1, and a location of the synthesis area or a characteristic of the image gain is switched for each frame, and a location of image deterioration varies for each frame.SELECTED DRAWING: Figure 1

WADA HIDETOSHI
KOIKE AZUSA
YANAGI MICHIHISA

JP2016087384A

November 02, 2017

April 25, 2016

Click for automatic bibliography generation  

CANON KK

G09G5/00; G09G3/20; G09G3/36; G09G5/10; H04N5/74

JP2014219572A	2014-11-20
JP2002268625A	2002-09-20
JP2005175786A	2005-06-30

US20030227599A1

2003-12-11

Yasunori Otsuka
Yasuhiro Otsuka
Shiro Takayanagi
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu

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