JPH0255281U - - Google Patents
Info
- Publication number
- JPH0255281U JPH0255281U JP13413288U JP13413288U JPH0255281U JP H0255281 U JPH0255281 U JP H0255281U JP 13413288 U JP13413288 U JP 13413288U JP 13413288 U JP13413288 U JP 13413288U JP H0255281 U JPH0255281 U JP H0255281U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- generating
- common voltage
- liquid crystal
- generating means
- 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)
- Transforming Electric Information Into Light Information (AREA)
Description
第１図はこの考案の一実施例を示す回路構成図
、第２図は同実施例の映像信号とコモン電圧の関
係を説明するための図、第３図ａ，ｂは同実施例
の映像信号上のデータとコモン電圧の関係を説明
するための図、第４図ａ，ｂは従来の液晶駆動回
路での映像信号とコモン電圧の関係を説明するた
めの図、第５図ａ，ｂは同回路での映像信号上の
データとコモン電圧の関係を説明するための図で
ある。
１４，１８，１９…アナログスイツチ部、２０
…タイミングパルス発生部、３１…映像信号、３
２，３３…コモン電圧。
Fig. 1 is a circuit configuration diagram showing an embodiment of this invention, Fig. 2 is a diagram for explaining the relationship between the video signal and common voltage of the same embodiment, and Figs. 3a and b are images of the same embodiment. Figures 4a and 4b are diagrams for explaining the relationship between signal data and common voltage. Figures 5a and b are diagrams for explaining the relationship between video signals and common voltage in a conventional liquid crystal drive circuit. is a diagram for explaining the relationship between the data on the video signal and the common voltage in the same circuit. 14, 18, 19...Analog switch section, 20
...Timing pulse generation section, 31...Video signal, 3
2, 33...Common voltage.
Claims (1)
置を駆動する液晶駆動回路において、上記液晶表
示装置に表示される映像信号を所定期間毎に極性
を切替えて発生する映像信号発生手段と、この映
像信号発生手段より発生される映像信号の垂直帰
線消去期間に対応するタイミングパルスを発生す
るタイミングパルス発生手段と、上記所定期間毎
に極性を切替えて印加されるコモン電圧として上
記映像信号の垂直走査期間のコモン電圧および上
記タイミングパルスに対応する垂直帰線消去期間
のコモン電圧を夫々発生するコモン電圧発生手段
とを具備したことを特徴とする液晶駆動回路。 A liquid crystal drive circuit for driving an active matrix drive type liquid crystal display device includes a video signal generating means for generating a video signal displayed on the liquid crystal display device by switching the polarity at a predetermined period; a timing pulse generating means for generating a timing pulse corresponding to the vertical blanking period of the video signal to be generated; and a common voltage during the vertical scanning period of the video signal as a common voltage applied with the polarity switched every predetermined period. and common voltage generating means for respectively generating common voltages during vertical blanking periods corresponding to the timing pulses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13413288U JPH0255281U (en) | 1988-10-14 | 1988-10-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13413288U JPH0255281U (en) | 1988-10-14 | 1988-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0255281U true JPH0255281U (en) | 1990-04-20 |
Family
ID=31392608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13413288U Pending JPH0255281U (en) | 1988-10-14 | 1988-10-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0255281U (en) |
-
1988
- 1988-10-14 JP JP13413288U patent/JPH0255281U/ja active Pending
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