Liquid crystal display and driving method thereof

Abstract

A liquid crystal display device that are adapted to display a certain information to a user when no signal is input after a power was applied to the liquid crystal display device. In the device, a liquid crystal display panel has pixel electrodes arranged in a matrix type. A timing controller generates and outputs control signals for driving the liquid crystal display panel in response to a timing synchronizing signal inputted from the exterior thereof, and re-arranges and outputs an input data. A drive circuit is connected between the liquid crystal display panel and the timing controller to display a data inputted from the timing controller on the liquid crystal display panel in response to the control signal. An oscillator generates a pre-synchronizing signal having a desired frequency to apply the same to the timing controller. A signal presence determiner compares the timing synchronizing signal with the pre-synchronizing signal to generate a determining signal indicating an input existence of the timing synchronizing signal. A control signal generator generates a control signal on the basis of the pre-synchronizing signal in response to a determining signal indicating no input of the timing synchronizing signal. A data storage device stores a certain picture data and outputs the picture data to the drive circuit in response to the determining signal indicating no input of the timing synchronizing signal.