JPS6448973U - - Google Patents
Info
- Publication number
- JPS6448973U JPS6448973U JP14345987U JP14345987U JPS6448973U JP S6448973 U JPS6448973 U JP S6448973U JP 14345987 U JP14345987 U JP 14345987U JP 14345987 U JP14345987 U JP 14345987U JP S6448973 U JPS6448973 U JP S6448973U
- Authority
- JP
- Japan
- Prior art keywords
- contrast
- adjustment device
- reference voltage
- detection output
- signal level
- 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 7
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は本考案のコントラスト調整装置の概略
ブロツク図、第２図は同装置の映像レベル比較検
出部の具体的回路図、第３図は映像検波出力の波
形図、第４図はコントラスト制御電圧と映像レベ
ル比較検出部の検出電圧との関係を示す図である
。
１……映像中間周波増幅部、２……映像レベル
比較検出部、５……映像・クロマ処理部、６……
コントラストボリユーム、７……コントラスト抑
制部、８……ＣＲＴ。
Figure 1 is a schematic block diagram of the contrast adjustment device of the present invention, Figure 2 is a specific circuit diagram of the video level comparison detection section of the device, Figure 3 is a waveform diagram of the video detection output, and Figure 4 is contrast control. FIG. 3 is a diagram showing a relationship between voltage and a detection voltage of a video level comparison detection section. 1...Video intermediate frequency amplification section, 2...Video level comparison detection section, 5...Video/chroma processing section, 6...
Contrast volume, 7...Contrast suppression section, 8...CRT.
Claims (1)
装置であつて、 映像検波出力の信号レベルを基準電圧と比較す
る比較手段と、 この比較手段の比較結果により、映像検波出力
の信号レベルが基準電圧より高くなつた場合にコ
ントラストを抑制するように動作するコントラス
ト制御手段とを備えたことを特徴とするコントラ
スト調整装置。[Scope of Claim for Utility Model Registration] A contrast adjustment device for a color television receiver, comprising a comparison means for comparing the signal level of the video detection output with a reference voltage, and a comparison result of the comparison means to adjust the signal level of the video detection output. 1. A contrast adjustment device comprising: contrast control means that operates to suppress contrast when a level becomes higher than a reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14345987U JPS6448973U (en) | 1987-09-18 | 1987-09-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14345987U JPS6448973U (en) | 1987-09-18 | 1987-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6448973U true JPS6448973U (en) | 1989-03-27 |
Family
ID=31410305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14345987U Pending JPS6448973U (en) | 1987-09-18 | 1987-09-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6448973U (en) |
-
1987
- 1987-09-18 JP JP14345987U patent/JPS6448973U/ja active Pending