Patent ID: 6384807
Filing Date: 2002-05-07
Classification: G09G

Abstract:
A liquid crystal display apparatus comprising:a liquid crystal display panel including a plurality of pixels, the pixels being constituted by at least a plurality of pixel electrodes disposed in a matrix arrangement, a reference electrode opposing the pixel electrodes, and a liquid crystal disposed between the pixel electrodes and the reference electrode; a data processing circuit which receives input display data and an input synchronizing signal, converts the input display data and the input synchronizing signal to output display data and an output synchronizing signal which are compatible with a signal driver circuit, generates an alternating signal as a timing signal for periodically inverting a polarity of a liquid crystal apply voltage applied to the liquid crystal, and outputs the output display data, the output synchronizing signal, and the alternating signal; a signal driver circuit which receives the output display data and the output synchronizing signal output from the data processing circuit, generates a liquid crystal apply voltage for a selected one of the pixels based on the output display data received from the data processing circuit, and applies the liquid crystal apply voltage for the selected one of the pixels to the liquid crystal via one of the pixel electrodes corresponding to the selected one of the pixels; a scan driver circuit which applies a selecting signal to the selected one of the pixels at a timing of the liquid crystal apply voltage for the selected one of the pixels; and a power source circuit which supplies power voltages to the data processing circuit and the signal driver circuit; wherein a logical voltage level of the output display data output from the data processing circuit is different from a logical voltage level of the input display data received by the data processing circuit.