Patent ID: 7227595
Filing Date: 2007-06-05
Classification: G09G,H04N

Abstract:
1. A liquid crystal television receiver comprising: a DC power supply to generate and to output tuning DC power providing a predetermined voltage; a receiving portion to output a video signal; a display portion to display the video signal; and a series regulator, wherein the receiving portion is fed the tuning DC power, sets a tuning frequency of a tuning circuit at a frequency corresponding to a received channel by applying a tuning signal to a variable-capacitance diode included in the tuning circuit, and receives a video signal, the tuning signal being generated according to the tuning DC power, the display portion includes: an active-matrix liquid crystal panel; a gate driver to generate a gate-on signal and to drive a gate line of the active-matrix liquid display panel using the gate-on signal, which turns on a gate by using gate-on DC power as operating power; and a data driver to drive a data line of the active-matrix liquid crystal panel, an allowable range of voltage corresponding to the tuning DC power and an allowable range of voltage corresponding to the gate-on DC power share, at least partly, a common allowable range of voltage, the tuning DC power is fed to the gate driver as the gate-on DC power, the series regulator is provided on at least one of a first power supply path to feed the tuning DC power from the DC power supply to the gate driver and a second power supply path to feed the tuning DC power from the DC power supply to the receiving portion, removes noise component, which is generated when the gate driver drives the gate lines, and stabilize a voltage applied to the gate driver, and a voltage corresponding to the tuning DC power is set to be within the common allowable range of voltage.