Patent ID: 7573447
Filing Date: 2009-08-11
Classification: G02F,G09G

Abstract:
1. An apparatus for driving a liquid crystal display device, the apparatus comprising: a liquid crystal display panel having at least two division areas; a plurality of light generators including at least one light emitting diode (LED) and irradiating light corresponding to each division area of the liquid crystal display panel; a timing controller supplied with a peak value of gray level of the each division area to generate each control signal corresponding to the peak value of the gray level of the each division area; and a driver to control a brightness of the light emitted by the LED, in accordance with the each control signal, wherein the driver adjusts a duty ratio of a signal being supplied to the LED in accordance with a reference brightness of the liquid crystal display panel during a scanning period before a picture implementing period of the liquid crystal display panel, and changes an amplitude of the signal to correspond to the reference brightness, or adjusts the amplitude of the signal being supplied to the LED in accordance with the reference brightness of the liquid crystal display panel, and changes the duty ratio of the signal to correspond to the reference brightness.