Patent ID: 6104366
Filing Date: 2000-08-15
Classification: G09G

Abstract:
A driving device for driving a liquid crystal display in accordance with a display data signal, said driving device comprising:shift register means having a register input terminal, a register output terminal, and first through N-th shift output terminals, where N represents a positive integer which is not less than ninety six, said shift register means being supplied with a start signal at said register input terminal for shifting said start signal in accordance with a clock signal to produce, from said register output terminal, a shifted start signal representative of a start of display, said shift register means producing first through N-th control signals from said first through said N-th shift output terminals, respectively, in synchronism with said clock signal;first through N-th output means connected to said first through said N-th shift output terminals, respectively, for producing first through N-th gradation voltages in correspondence with said display data signal in synchronism with said first through said N-th control signals, respectively;a single additional output means for producing an additional gradation voltage in correspondence with said display data signal in synchronism with an additional control signal; andconnecting means for connecting said additional output means for an n-th shift output terminal,wherein when an n-th output means becomes faulty, where n is a variable between one and N, both inclusive, said connecting means supplies said additional output means with an n-th control signal as said additional control signal for producing said additional gradation voltage as an n-th gradation voltage.