SUB-PICTURE BRIGHTNESS AUTOMATICALLY-CONTROLLING CIRCUIT OF SUB-PICTURE TELEVISION

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically controlling sub-screen brightness of a sub-screen television, which is configured to automatically lower the brightness of the sub-screen during daytime viewing of a sub-screen television having a sub-screen function. A sub-screen television having a tuner and a plurality of video signal processing means capable of displaying a plurality of channels on one screen, the sub-screen television comprising: an illuminance detecting means for detecting the brightness of the surroundings, a main screen brightness detecting means for detecting the brightness of the main screen, And control means for controlling the sub-screen based on the illuminance detection signal of the illuminance detecting means and the main screen brightness detecting signal of the main screen brightness detecting means.