JPH0455020U - - Google Patents
Info
- Publication number
- JPH0455020U JPH0455020U JP9810990U JP9810990U JPH0455020U JP H0455020 U JPH0455020 U JP H0455020U JP 9810990 U JP9810990 U JP 9810990U JP 9810990 U JP9810990 U JP 9810990U JP H0455020 U JPH0455020 U JP H0455020U
- Authority
- JP
- Japan
- Prior art keywords
- heater
- signal
- comparator
- input
- control
- 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
- 230000000630 rising effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Feedback Control In General (AREA)
- Control Of Temperature (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は実施例の回路の各部信号波形を示すタイムチ
ヤート、第３図は従来のヒーター制御回路の一例
を示す回路図、第４図は第３図回路の各部信号波
形を示すタイムチヤートである。
１……ヒーター、２……トランジスタ、３……
コンパレータ、４……温度センサー、５……Ｄ型
フリツプフロツプ。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
3 is a circuit diagram showing an example of a conventional heater control circuit, and FIG. 4 is a time chart showing signal waveforms of various parts of the circuit shown in FIG. 3. 1...Heater, 2...Transistor, 3...
Comparator, 4... Temperature sensor, 5... D-type flip-flop.
Claims (1)
ンサーの検出温度と設定温度を比較しスイツチン
グ制御信号を出力するコンパレータとを有し、ヒ
ーター付きデイスプレイ装置のヒーターをオン、
オフ制御するヒーター制御回路において、前記コ
ンパレータの出力側に、該コンパレータ出力信号
をデータ入力するとともに垂直ブランキング信号
をクロツク入力とし、データ入力信号のレベルに
応じてクロツク入力信号の立ち上がり時に出力信
号が反転する論理回路を設け、該論理回路の出力
信号によつて前記ヒーターをオン、オフ制御する
ように構成したことを特徴とするヒーター制御回
路。 It has a temperature sensor that detects the ambient temperature and a comparator that compares the detected temperature of the temperature sensor with the set temperature and outputs a switching control signal, and turns on the heater of the display device with a heater.
In a heater control circuit that performs OFF control, the comparator output signal is input as data to the output side of the comparator, and the vertical blanking signal is input as clock input, and the output signal changes at the rising edge of the clock input signal according to the level of the data input signal. 1. A heater control circuit comprising: an inverting logic circuit; and an output signal from the logic circuit to control the heater on and off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9810990U JPH0455020U (en) | 1990-09-20 | 1990-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9810990U JPH0455020U (en) | 1990-09-20 | 1990-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0455020U true JPH0455020U (en) | 1992-05-12 |
Family
ID=31839032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9810990U Pending JPH0455020U (en) | 1990-09-20 | 1990-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455020U (en) |
-
1990
- 1990-09-20 JP JP9810990U patent/JPH0455020U/ja active Pending
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