发明名称 |
LIQUID CRYSTAL DRIVE CIRCUIT, SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE, REFERENCE VOLTAGE BUFFER CIRCUIT, AND METHOD FOR CONTROLLING THE SAME |
摘要 |
<p>A source driver 4A arranged on a liquid crystal panel includes therein in-chip reference voltage wires 17 extending from one end to the other end of an LSI chip. The source driver 4A includes therein: branch reference voltage wires 17a branching off from in-chip reference voltage wires 17; reference voltage production buffers 31; a control circuit 30 for controlling the reference voltage production buffers 31; a reference voltage production resistor section 32 for subdividing the reference voltage into values of n steps; voltage level selection circuits 34 each for selecting one of the subdivided voltages; and output buffers 35. Since the reference voltages are supplied to each source driver 4 via wiring for connecting the in-chip reference voltage wires 17 in series with one another, the wiring structure for supplying the reference voltages can be simplified. <IMAGE></p> |
申请公布号 |
EP1244090(A1) |
申请公布日期 |
2002.09.25 |
申请号 |
EP20000956831 |
申请日期 |
2000.08.31 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
DOI, YASUYUKI;OOMORI, TETSURO;NISHI, KAZUYOSHI |
分类号 |
G02F1/133;G09F9/30;G09G3/20;G09G3/36;(IPC1-7):G09G3/36 |
主分类号 |
G02F1/133 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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