JPS61103967U - - Google Patents

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Publication number
JPS61103967U
JPS61103967U JP18596584U JP18596584U JPS61103967U JP S61103967 U JPS61103967 U JP S61103967U JP 18596584 U JP18596584 U JP 18596584U JP 18596584 U JP18596584 U JP 18596584U JP S61103967 U JPS61103967 U JP S61103967U
Authority
JP
Japan
Prior art keywords
contrast
gunman
brightness
video signal
utility
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
JP18596584U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP18596584U priority Critical patent/JPS61103967U/ja
Publication of JPS61103967U publication Critical patent/JPS61103967U/ja
Pending legal-status Critical Current

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Description

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

第1図は本考案の基本的な例、及びその特性、
第2図はスレツシユホールドを設けた場合の例、
及びその特性を示す。第1図、第2図はそれぞれ
本考案に係るガンマ補正回路の実施例を示す図、
第3図、第4図はそれぞれ第1図、第2図、の入
出力信号特性を示す図である。 1……コントラストアンプ、2……電圧・電流
変換回路、3……コンパレータ。
Figure 1 shows a basic example of the present invention and its characteristics.
Figure 2 shows an example when a threshold is provided.
and its characteristics. FIG. 1 and FIG. 2 are diagrams showing an embodiment of the gamma correction circuit according to the present invention, respectively;
FIGS. 3 and 4 are diagrams showing the input/output signal characteristics of FIGS. 1 and 2, respectively. 1...Contrast amplifier, 2...Voltage/current conversion circuit, 3...Comparator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 映像信号の一部をコントラストアンプのコント
ロール回路にフイードバツクして、輝度の高いと
きにコントラストを下げるようにしたことを特徴
とするガンマン補正回路。
A gunman correction circuit characterized by feeding back a portion of the video signal to a control circuit of a contrast amplifier to lower contrast when brightness is high.
JP18596584U 1984-12-07 1984-12-07 Pending JPS61103967U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18596584U JPS61103967U (en) 1984-12-07 1984-12-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18596584U JPS61103967U (en) 1984-12-07 1984-12-07

Publications (1)

Publication Number Publication Date
JPS61103967U true JPS61103967U (en) 1986-07-02

Family

ID=30743425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18596584U Pending JPS61103967U (en) 1984-12-07 1984-12-07

Country Status (1)

Country Link
JP (1) JPS61103967U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58221575A (en) * 1982-06-17 1983-12-23 Matsushita Electric Ind Co Ltd Gamma compensating circuit of video signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58221575A (en) * 1982-06-17 1983-12-23 Matsushita Electric Ind Co Ltd Gamma compensating circuit of video signal

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