Patent ID: 6480181
Filing Date: 2002-11-12
Classification: G09G

Abstract:
A driver for driving a liquid crystal panel that includes a pair of substrates, a liquid crystal sandwiched between said substrates, a plurality of signal lines which are arranged in a first direction on the substrate and to which an image signal is supplied, a plurality of scanning lines which are arranged in correspondence with intersections a second direction and to said first direction on the substrate and to which a scan signal is supplied sequentially, and a plurality of pixels arranged in the form of a matrix on the liquid crystal side of the substrate and driven with said image signal and said scan signal supplied by said plurality of signal lines and said plurality of scanning lines, respectively, said driver comprising:an image signal supply unit including a first-direction shift register having a plurality of stages, and supplying the image signal sequentially to said plurality of signal lines in the first direction according to a transfer signal sequentially generated by said first-direction shift register; and a scan signal supply unit including a second-direction shift register having a plurality of stages, and supplying the scan signal sequentially to said plurality of scanning lines in the second direction according to a transfer signal sequentially generated by said second-direction shift register, at least one of the first and second-direction shift registers being provided with: a first flip flop having an input terminal to which inputs a first transfer signal, and a first logic circuit having a first input terminal which inputs an output of an nth flip flop, a second terminal to which is input a second transfer signal, and an output terminal which outputs to an n+1th flip flop, the first logic circuit operating such that when the first transfer signal is input to the first flip flop and the second transfer signal is not input, a transfer operation begins from the first flip flop, and when the second transfer signal is input and the first transfer signal is not input to the first flip flop, a transfer operation begins from the n+1th flip flop, whereby logic is set at least one of said first-direction and second-direction shift registers comprising a detector that detects termination of a scan effected with the transfer signal on a given stage; and said driver further comprising a voltage application device that applies a given voltage to pixels constituting non-image display areas that are outside an image display area, the image display area being defined by the image signal at a synchronous time when termination of the scan is detected.