Patent ID: 6498596
Filing Date: 2002-12-24
Classification: G09G,G11C,H03M

Abstract:
A driving circuit of a display device including a digital-analog converter circuit which introduces digital data and outputs an analog video signal, said digital-analog converter circuit comprising:a reference voltage selecting circuit which is responsive to each of bit signals of data of a plurality of bits to exclusively select and output one of a plurality of reference voltages; a group of input-side capacitor elements connected to said reference voltage selecting circuit and including a plurality of capacitor elements which hold the reference voltage output from said reference voltage selecting circuit; an amplifier which amplifies a voltage in accordance with electric charge accumulated to each capacitor element in said group of input-side capacitor elements; and a connection circuit which supplies electric charge of each capacitor element in said group of input-side capacitor elements to said amplifier selectively in sequence, wherein said amplifier includes: an output-side capacitor element which holds electric charge distributed from each capacitor element in said group of input-side capacitor elements; and a buffer amplifier which amplifies a voltage due to the electric charge held on said output-side capacitor element and outputs the amplified voltage as an analog video signal.