发明名称 GRADATION VOLTAGE GENERATION CIRCUIT, DRIVING CIRCUIT, AND ELECTRO-OPTICAL APPARATUS
摘要 PROBLEM TO BE SOLVED: To provide a gradation voltage generation circuit capable of stably supplying gradation voltages corresponding to various gamma characteristics with a low power consumption at a low cost, a driving circuit, and an electro-optical apparatus. SOLUTION: A gradation voltage generation circuit 140 includes; an input-side resistance circuit 142 having first to J-th input voltage division nodes whose voltages result from dividing a voltage between first and second power lines by (J+1) (J is a positive integer) resistance elements which are connected in series between the first and second power lines and have fixed resistance values; first to J-th voltage follower circuits OPAMP<SB>1</SB>to OPAMP<SB>J</SB>to which voltages of respective input voltage division nodes are inputted; an output-side resistance circuit 144 which is connected between both power lines and has first to J-th output voltage division nodes which have voltages resulting from dividing a voltage between both ends and are driven by respective voltage follower circuits; and a gradation voltage selection circuit 146 which outputs voltages of L (J<L<K and L is an integer) kinds of resistance division nodes out of K(J<K and K is an integer) resistance division nodes for dividing voltages between both ends of the output-side resistance circuit 144, as gradation voltages. A voltage of an i-th (1≤i≤J and i is an integer) output voltage division node is equal to that of an i-th input voltage division node. COPYRIGHT: (C)2006,JPO&NCIPI
申请公布号 JP2006039205(A) 申请公布日期 2006.02.09
申请号 JP20040218841 申请日期 2004.07.27
申请人 SEIKO EPSON CORP 发明人 HARA TARO;KOBAYASHI MASANORI
分类号 G09G3/36;G02F1/133;G09G3/20 主分类号 G09G3/36
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