TELEVISION SIGNAL CONTROLLER

摘要

PURPOSE:To project plural kinds of signal on the same screen in an easy-to-see state by switching and outputting the 1st gain-controlled TV signal and the 2nd TV clamped and a luminance level controlled signal through switching circuit. CONSTITUTION:The 1st TV signal inputted from input terminals 1(1R-1B) are varied in gain by gain control circuits 6(6R-6B) according to a control signal from an input terminal 7 and applied as level-lowered TV signals to switching circuits 3(3R-3B). The 2nd TV signals inputted to input terminals 2(2R-2B), on the other hand, are clamped by clamping circuits 8(8R-8B), brought under the luminance level control at a brightness control circuits 10(10R-10B), and applied to the switching circuits 3(3R-3B). Those two kinds of TV signal are switched by the switching circuits 3 according to a switching signal from an input terminal 4 and then outputted to output terminals 5(5R-5B).