Title:
液晶駆動回路,半導体集積回路及び液晶パネル
Document Type and Number:
Japanese Patent JP3993725
Kind Code:
B2
Abstract:
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.
Inventors:
Yasuyuki Doi
Tetsuro Omori
Kazuyoshi Nishi
Tetsuro Omori
Kazuyoshi Nishi
Application Number:
JP35689899A
Publication Date:
October 17, 2007
Filing Date:
December 16, 1999
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G02F1/133; G09G3/36; G09F9/30; G09G3/20
Domestic Patent References:
| JP8087251A | ||||
| JP9044100A | ||||
| JP2001174843A | ||||
| JP5035220A |
Attorney, Agent or Firm:
Hiroshi Maeda
Hiroshi Koyama
Hiroshi Koyama