Patent ID: 6756960
Filing Date: 2004-06-29
Classification: G09G

Abstract:
A display device, comprising:signal lines and scanning lines in a matrix form; display elements arranged in the vicinity of intersections of the signal lines and the scanning lines; a signal line driving circuit configured to drive each of the signal lines; and a scanning line driving circuit configured to drive each of the scanning lines; wherein said signal line driving circuit includes: a shift resister of entire clock-type, having a plurality of resister circuits connected in cascade, capable of allowing a clock signal to shift in two-way directions between these resister circuits, configured to output from each of the resister circuits, shift pulses obtained by allowing the clock signal to shift; a pulse width adjusting circuit configured to adjust pulse widths of said shift pulses; and a switching circuit configured to turn ON/OFF based on a switching control signal serving as the output of said pulse width adjusting circuit, and to provide a pixel voltage to the corresponding signal line to the ON period, wherein said plurality of resister circuits are composed of the same circuit configuration, respectively; and said pulse width adjusting circuit adjusts the pulse width of said shift pulse so that more than one of said switching circuits do not turn on at the same time, generates a switching control signal of one's own switching circuit based on one's own shift pulse and the switching control signal of the switching circuit at the preceding stage when a shift direction control signal for controlling shift directions of said shift register is in a first logic, and generates the switching control signal of one's own switching circuit based on one's own shift pulse and the switching control signal of said switching circuit at the next stage when said shift direction control signal is in a second logic.