JPS6045570U - Automatic contrast correction circuit - Google Patents

Automatic contrast correction circuit

Info

Publication number
JPS6045570U
JPS6045570U JP13693383U JP13693383U JPS6045570U JP S6045570 U JPS6045570 U JP S6045570U JP 13693383 U JP13693383 U JP 13693383U JP 13693383 U JP13693383 U JP 13693383U JP S6045570 U JPS6045570 U JP S6045570U
Authority
JP
Japan
Prior art keywords
blanking
correction circuit
output signal
video output
contrast correction
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
Application number
JP13693383U
Other languages
Japanese (ja)
Inventor
岩本　澄男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP13693383U priority Critical patent/JPS6045570U/en
Publication of JPS6045570U publication Critical patent/JPS6045570U/en
Pending legal-status Critical Current

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  • Television Receiver Circuits (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

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案による自動コントラスト補正回路を使用
したテレビジョン受像機のブロック図、第２図は同自動
コントラスト補正回路の具体的な回路図、第３図は同自
動コントラスト補正回路の動作説明のための信号波形図
である。 ７・・・コントラスト調整回路、８・・・ブランキング
パルス抜取回路、９・・・ブランキングキャンセル回路
、１０・・・黒ピーク検出回路、１１・・・直流増幅回
路。Figure 1 is a block diagram of a television receiver using the automatic contrast correction circuit according to the present invention, Figure 2 is a detailed circuit diagram of the automatic contrast correction circuit, and Figure 3 is an explanation of the operation of the automatic contrast correction circuit. FIG. 7... Contrast adjustment circuit, 8... Blanking pulse extraction circuit, 9... Blanking cancel circuit, 10... Black peak detection circuit, 11... DC amplifier circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 映像出力信号中のブランキングパルスを抜取るブランキ
ングパルス抜取手段と、該抜取手段により抜取られたブ
ランキングパルスを基に映像出力信号中のブランキング
レベルを灰色レベルまで低減するブランキングキャンセ
ル手段と、該キャンセル手段によりブランキングレベル
の低減された映像出力信号の黒ピークを検出する黒ピー
ク検出手段と、該検出手段により検出された黒ピークレ
ベルに応じてコントラストを自動的に調整するコントラ
スト調整手段とを備えたことを特徴とする自動コントラ
スト補正回路。Blanking pulse extraction means for extracting blanking pulses from a video output signal; and blanking canceling means for reducing a blanking level in a video output signal to a gray level based on the blanking pulses extracted by the extraction means. , a black peak detecting means for detecting a black peak of the video output signal whose blanking level has been reduced by the canceling means, and a contrast adjusting means for automatically adjusting contrast according to the black peak level detected by the detecting means. An automatic contrast correction circuit characterized by comprising:
JP13693383U 1983-09-02 1983-09-02 Automatic contrast correction circuit Pending JPS6045570U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13693383U JPS6045570U (en) 1983-09-02 1983-09-02 Automatic contrast correction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13693383U JPS6045570U (en) 1983-09-02 1983-09-02 Automatic contrast correction circuit

Publications (1)

Publication Number Publication Date
JPS6045570U true JPS6045570U (en) 1985-03-30

Family

ID=30307725

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13693383U Pending JPS6045570U (en) 1983-09-02 1983-09-02 Automatic contrast correction circuit

Country Status (1)

Country Link
JP (1) JPS6045570U (en)

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