BLACK-AND-WHITE TV SET Russian patent published in 1997 - IPC

FIELD: radio communication equipment. SUBSTANCE: black-and-white TV set has channel selector, intermediate frequency amplifier, videodetector, videoamplifier, synchronization pulse selector, master generator, output stage of line sweep, master generator, output stage of frame sweep, audio-frequency channel, automatic gain control system, analog-to-digital converter, control unit, controlled radiator, pulse generator, key, blanking pulse circuit, OR gate, piezodeflector of line sweep, piezodeflector of frame sweep, matte screen. Controlled radiator is manufactured in mix of proper number of light diodes and color correction filter. Technical result of invention consists in exclusion of kinescope with power supply unit which reduces electric energy consumption and enhances operational safety of set as it becomes low-voltage device. Image is reconstructed by beam brightness modulated by digital codes of videosignals. Mentioned analog-to-digital converter has discretization frequency of 6.6 MHz with eight-digit coding of videosignals. EFFECT: enhanced operational safety of TV set. 3 dwg , 1 tbl