JPS62188873U - - Google Patents
Info
- Publication number
- JPS62188873U JPS62188873U JP7549386U JP7549386U JPS62188873U JP S62188873 U JPS62188873 U JP S62188873U JP 7549386 U JP7549386 U JP 7549386U JP 7549386 U JP7549386 U JP 7549386U JP S62188873 U JPS62188873 U JP S62188873U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- contrast
- amplification
- power
- input video
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009931 pascalization Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は本考案の一実施例によるコントラスト
制御回路の構成図、第２図はこの考案の一実施例
による外部強制コントラスト制御部を示すブロツ
ク構成図、第３図はこの考案のパワーＯＮ時の外
部強制コントラスト制御のパワーＯＮ検出部を示
す回路構成図である。
２……Ｙ／Ｃ分離回路、３……色信号処理部、
１０……偏向・高圧処理部、１１……ブラウン管
。
Fig. 1 is a block diagram of a contrast control circuit according to an embodiment of the present invention, Fig. 2 is a block diagram showing an external forced contrast control section according to an embodiment of this invention, and Fig. 3 is a block diagram of the contrast control circuit according to an embodiment of the present invention. FIG. 2 is a circuit configuration diagram showing a power ON detection section for external forced contrast control. 2...Y/C separation circuit, 3...color signal processing section,
10...Deflection/high pressure processing section, 11...Cathode ray tube.
Claims (1)
ＯＮ検出手段と、入力ビデオ信号を選択する際を
検出するビデオ信号切換検出手段と、コントラス
ト増幅手段と、このコントラスト増幅手段のゲイ
ンを制御する制御手段とを備えて、電源投入時又
は、入力ビデオ信号選択切換時に、前記コントラ
スト増幅手段の増幅度レベルを低下させた状態か
ら一定時間かけて、あらかじめ設定されてた所定
の増幅度に復帰する前記制御手段とすることを特
徴とするコントラスト制御回路。 A power ON detection means of a TV receiver for outputting and displaying a video signal, a video signal switching detection means for detecting when an input video signal is selected, a contrast amplification means, and a control means for controlling the gain of the contrast amplification means. the control means for returning the amplification degree of the contrast amplification means from a reduced state to a predetermined amplification degree set in advance over a certain period of time when the power is turned on or when input video signal selection is switched; A contrast control circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7549386U JPS62188873U (en) | 1986-05-20 | 1986-05-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7549386U JPS62188873U (en) | 1986-05-20 | 1986-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62188873U true JPS62188873U (en) | 1987-12-01 |
Family
ID=30921685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7549386U Pending JPS62188873U (en) | 1986-05-20 | 1986-05-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62188873U (en) |
-
1986
- 1986-05-20 JP JP7549386U patent/JPS62188873U/ja active Pending