JPS61103967U - - Google Patents
Info
- 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
Links
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
Description
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)
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.
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)
| 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 |
-
1984
- 1984-12-07 JP JP18596584U patent/JPS61103967U/ja active Pending
Patent Citations (1)
| 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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