Patent ID: 7417616
Filing Date: 2008-08-26
Classification: G09G,H05B

Abstract:
1. An inverter for a liquid crystal display, the inverter comprising: an inverter controller generating a carrier signal for pulse width modulation and a lamp driving signal having on-time and off-time by pulse width modulating a dimming signal based on the carrier signal and controlling the on-time of the lamp driving signal in response to at least one of a vertical synchronization signal and a vertical synchronization start signal; a power switching element selectively transmitting a DC voltage in response to a signal from the inverter controller; and a voltage booster for driving a lamp in response to a signal from the switching element; wherein the inverter controller includes a control block which generates the carrier signal and the lamp driving signal, a time constant setting block which determines a time constant of the carrier signal, and an initiation block which resets the time constant given by the time constant setting block whenever pulses of the vertical synchronization signal are generated.