JPH036626U - - Google Patents
Info
- Publication number
- JPH036626U JPH036626U JP6567989U JP6567989U JPH036626U JP H036626 U JPH036626 U JP H036626U JP 6567989 U JP6567989 U JP 6567989U JP 6567989 U JP6567989 U JP 6567989U JP H036626 U JPH036626 U JP H036626U
- Authority
- JP
- Japan
- Prior art keywords
- common electrode
- liquid crystal
- drive circuit
- dummy
- crystal drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Liquid Crystal Display Device Control (AREA)
Description
第１図及び第２図はこの考案の一実施例を示す
もので、第１図は回路構成を示すブロツク図、第
２図は第１図のセグメント電極とコモン電極での
電圧波形を示すタイミングチヤート、第３図は従
来の液晶駆動回路の構成を示すブロツク図、第４
図は第３図のセグメント電極とコモン電極での電
圧波形を示すタイミングチヤートである。
１１，２１……液晶表示パネル、１２，１７，
２２，２７……シフトレジスタ、１３，２３……
ラツチ回路、１４１〜１４ｍ，１６１〜１６ｍ，
１８１〜１８ｎ，２０１〜２０ｎ，２４１〜２４
ｍ，２６１〜２６ｍ，２８１〜２８ｎ，３０１〜
３０ｎ……アナログスイツチ、１５１〜１５ｍ，
１９１〜１９ｎ，２５１〜２５ｍ，２９１〜２９
ｎ……インバータ、Ｙ１〜Ｙｍ……セグメント電
極、Ｘ１〜Ｘｎ……コモン電極、Ｘｄ……ダミー
コモン電極。
Figures 1 and 2 show an embodiment of this invention. Figure 1 is a block diagram showing the circuit configuration, and Figure 2 is a timing diagram showing voltage waveforms at the segment electrodes and common electrodes in Figure 1. Chart, Figure 3 is a block diagram showing the configuration of a conventional liquid crystal drive circuit, Figure 4 is a block diagram showing the configuration of a conventional liquid crystal drive circuit.
The figure is a timing chart showing voltage waveforms at the segment electrodes and common electrodes in FIG. 3. 11, 21...Liquid crystal display panel, 12, 17,
22, 27...shift register, 13, 23...
Latch circuit, 141~14m, 161~16m,
181-18n, 201-20n, 241-24
m, 261~26m, 281~28n, 301~
30n...Analog switch, 151~15m,
191-19n, 251-25m, 291-29
n...Inverter, Y1-Ym...Segment electrode, X1-Xn...Common electrode, Xd...Dummy common electrode.
Claims (1)
駆動回路において、 コモン電極に並設され、セグメント電極に対向
するダミーコモン電極と、 上記コモン電極の非選択レベルの電圧がプラス
入力に、上記ダミーコモン電極がマイナス入力に
接続される一方、その出力が抵抗を介して上記ダ
ミーコモン電極に接続されると共に、アナログス
イツチを介して上記コモン電極と非選択時のみ接
続されるオペアンプと を具備したことを特徴とする液晶駆動回路。[Scope of Claim for Utility Model Registration] In a liquid crystal drive circuit that drives a matrix type liquid crystal display element, a dummy common electrode is arranged in parallel with a common electrode and faces a segment electrode, and a non-selection level voltage of the common electrode is positive. An operational amplifier whose input is connected to the dummy common electrode to the negative input, and whose output is connected to the dummy common electrode via a resistor and to the common electrode via an analog switch only when not selected. A liquid crystal drive circuit characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6567989U JPH036626U (en) | 1989-06-05 | 1989-06-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6567989U JPH036626U (en) | 1989-06-05 | 1989-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH036626U true JPH036626U (en) | 1991-01-23 |
Family
ID=31597723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6567989U Pending JPH036626U (en) | 1989-06-05 | 1989-06-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH036626U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4923117U (en) * | 1972-05-31 | 1974-02-27 |
-
1989
- 1989-06-05 JP JP6567989U patent/JPH036626U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4923117U (en) * | 1972-05-31 | 1974-02-27 |
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