Patent ID: 7236214
Filing Date: 2007-06-26
Classification: G02F,G09G

Abstract:
1. A liquid crystal television receiver in which video by a video signal outputted by a receiving part is displayed on a liquid crystal panel, comprising: a liquid crystal panel for performing active matrix driving; a gate driver for driving a gate line of the liquid crystal panel; a data driver for driving a data line of the liquid crystal panel by a signal corresponding to luminance of a pixel; a cold cathode tube used as a light source of a back light part for illuminating the liquid crystal panel from the back; a boosting circuit for driving and lighting the cold cathode tube; a first DC power source part for generating a first DC output used as an operating power source of the data driver and also used as an operating power source of the boosting circuit; a second DC power source part which is a switching power source for generating a second DC output using the first DC output as an operating power source; a receiving part for using the second DC output as an operating power source and receiving commercial broadcast and also outputting a video signal obtained by the receiving; and a regulator circuit for eliminating a noise component caused by the boosting circuit and a noise component caused by the second DC power source part, wherein: the regulator circuit is inserted into a path of the first DC output ranging from the first DC power source part to the data driver; and the path of the first DC output ranging from the first DC power source part to the data driver is branched from a path of the first DC output ranging from the first DC power source part to the boosting circuit.