JPH0236896U - - Google Patents
Info
- Publication number
- JPH0236896U JPH0236896U JP11580288U JP11580288U JPH0236896U JP H0236896 U JPH0236896 U JP H0236896U JP 11580288 U JP11580288 U JP 11580288U JP 11580288 U JP11580288 U JP 11580288U JP H0236896 U JPH0236896 U JP H0236896U
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- circuit
- generates
- power supply
- signal
- 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
- 239000004973 liquid crystal related substance Substances 0.000 claims description 12
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Liquid Crystal Display Device Control (AREA)
Description
第１図は従来の液晶駆動装置の回路構成を示す
ブロツク図、第２図は第１図の液晶駆動装置にお
ける波形信号を示す図、第３図および第４図はこ
の考案の一実施例を示すもので、第３図はこの考
案を適用した液晶駆動装置の回路構成を示す図、
第４図は第３図の液晶駆動装置における波形信号
を示す図である。
１，１１…液晶駆動部、２，１２…液晶表示体
、１３…ｃｐｕ、１４…ラツチ、１５…発振器、
１６…分周回路、１７…ラツチ、１８…表示タイ
ミング発生部。
FIG. 1 is a block diagram showing the circuit configuration of a conventional liquid crystal driving device, FIG. 2 is a diagram showing waveform signals in the liquid crystal driving device of FIG. 1, and FIGS. 3 and 4 show an embodiment of this invention. Figure 3 is a diagram showing the circuit configuration of a liquid crystal drive device to which this invention is applied.
FIG. 4 is a diagram showing waveform signals in the liquid crystal driving device of FIG. 3. DESCRIPTION OF SYMBOLS 1, 11...Liquid crystal drive part, 2, 12...Liquid crystal display body, 13...CPU, 14...Latch, 15...Oscillator,
16... Frequency divider circuit, 17... Latch, 18... Display timing generator.
Claims (1)
源回路と、この電源回路を電源とし液晶駆動信号
を発生する液晶駆動回路と、この液晶駆動回路の
基本クロツクを発生する発振器と、この発振器か
らの基本クロツクに基づいて所定周波数のタイミ
ング信号を発生する信号発生回路とを具備してな
る液晶駆動装置において、 コントラスト調整用データが設定されるラツチ
手段と、 このラツチ手段の内容と上記信号発生回路から
発生されるタイミング信号とにより上記電源回路
からの電圧供給を停止させ、上記液晶駆動信号の
実効値を減少させるコントラスト調整手段と を具備したことを特徴とする液晶駆動装置。[Claims for Utility Model Registration] A power supply circuit for supplying voltage to drive a liquid crystal display, a liquid crystal drive circuit that uses this power supply circuit as a power supply and generates a liquid crystal drive signal, and generates a basic clock for this liquid crystal drive circuit. A liquid crystal driving device comprising an oscillator that generates a clock signal and a signal generating circuit that generates a timing signal of a predetermined frequency based on a basic clock from the oscillator, a latch means for setting data for contrast adjustment, and a latch means for setting contrast adjustment data. and contrast adjustment means for stopping the voltage supply from the power supply circuit and reducing the effective value of the liquid crystal drive signal according to the content of the above and the timing signal generated from the signal generation circuit. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11580288U JPH0236896U (en) | 1988-09-02 | 1988-09-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11580288U JPH0236896U (en) | 1988-09-02 | 1988-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0236896U true JPH0236896U (en) | 1990-03-09 |
Family
ID=31357780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11580288U Pending JPH0236896U (en) | 1988-09-02 | 1988-09-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0236896U (en) |
-
1988
- 1988-09-02 JP JP11580288U patent/JPH0236896U/ja active Pending
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