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1. (WO2013114805) VIDEO DISPLAY CONTROL DEVICE

Pub. No.:    WO/2013/114805    International Application No.:    PCT/JP2013/000209
Publication Date: Fri Aug 09 01:59:59 CEST 2013 International Filing Date: Fri Jan 18 00:59:59 CET 2013
IPC: G09G 3/36
G09G 3/20
G09G 3/34
Applicants: PANASONIC CORPORATION
パナソニック株式会社
Inventors: SHIMURA, Takuma
志村 拓真
SUENAGA, Terumitsu
末永 輝光
AKITA, Takashi
秋田 貴志
Title: VIDEO DISPLAY CONTROL DEVICE
Abstract:
A video display control device comprises: a video signal processing unit which corrects a video signal on the basis of control data which a control data generator unit generates and outputs to a display a post-correction video signal; and a backlight control unit which controls emitted light brightness of a backlight on the basis of the difference between the average brightness of the video signal and the average brightness of the post-correction video signal. The control data generator unit allocates to a low-tone region a portion of a high-tone region dynamic range of the video signal in which a video signal corresponding to a black band region is excluded. The backlight control unit controls the emitted light brightness of the backlight to eliminate an increase or decrease in the average brightness of a video which is displayed in a screen according to an increase or decrease in the average brightness of the post-correction video signal with respect to the average brightness of the video signal.