JPS593675U - Automatic contrast adjustment circuit for television receivers - Google Patents
Automatic contrast adjustment circuit for television receiversInfo
- Publication number
- JPS593675U JPS593675U JP9911082U JP9911082U JPS593675U JP S593675 U JPS593675 U JP S593675U JP 9911082 U JP9911082 U JP 9911082U JP 9911082 U JP9911082 U JP 9911082U JP S593675 U JPS593675 U JP S593675U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- contrast adjustment
- adjustment circuit
- primary color
- television receivers
- 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
- Television Receiver Circuits (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は本考案によるテレビ受像機の自動コントラスト調整
回路の一実施例を示す回路図である。
１・・・チューナ一部、２・・・アンテナ、３・・・中
間周波増幅回路、４・・・映像検波回路、５・・・コン
トラスト調整回路、６，８・・・可変抵抗器、７・・・
クランプ回路、９・・・マ） ＩＪソックス路、１０・
・・陰極線管、 １１・・・加算回路、１２・・・積
分回路、１３・・・しきい値検出回路、１４・・・増幅
回路、１５・・・アノード電流検出回路。The figure is a circuit diagram showing an embodiment of an automatic contrast adjustment circuit for a television receiver according to the present invention. DESCRIPTION OF SYMBOLS 1... Tuner part, 2... Antenna, 3... Intermediate frequency amplification circuit, 4... Video detection circuit, 5... Contrast adjustment circuit, 6, 8... Variable resistor, 7 ...
Clamp circuit, 9...Ma) IJ sock path, 10.
... Cathode ray tube, 11... Adding circuit, 12... Integrating circuit, 13... Threshold detection circuit, 14... Amplifying circuit, 15... Anode current detection circuit.
Claims (1)
像信号をマトリックス回路に入力して３原色信号を復調
し、この３原色信号を陰極線管に供給して画像表示を行
なうテレビ受像機に於いて、前記３原色信号を加算する
加算回路と、この加算回路の出力信号を積分する積分回
路と、この積分回路の出力に対応して前記マトリックス
回路に供給される映像信号のコントラストを制御するコ
ントラスト調整回路とを備えたことを特徴とするテレビ
受像機の自動コントラスト調整回路。TV reception in which a part of the output signal is subjected to video detection, the extracted video signal is input to a matrix circuit, the three primary color signals are demodulated, and the three primary color signals are supplied to a cathode ray tube to display an image. In the machine, an adding circuit that adds the three primary color signals, an integrating circuit that integrates the output signal of this adding circuit, and a contrast of the video signal supplied to the matrix circuit corresponding to the output of this integrating circuit are calculated. An automatic contrast adjustment circuit for a television receiver, comprising: a contrast adjustment circuit for controlling a contrast adjustment circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9911082U JPS593675U (en) | 1982-06-30 | 1982-06-30 | Automatic contrast adjustment circuit for television receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9911082U JPS593675U (en) | 1982-06-30 | 1982-06-30 | Automatic contrast adjustment circuit for television receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS593675U true JPS593675U (en) | 1984-01-11 |
Family
ID=30235017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9911082U Pending JPS593675U (en) | 1982-06-30 | 1982-06-30 | Automatic contrast adjustment circuit for television receivers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS593675U (en) |
-
1982
- 1982-06-30 JP JP9911082U patent/JPS593675U/en active Pending
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