JPS61104684U - - Google Patents
Info
- Publication number
- JPS61104684U JPS61104684U JP18816384U JP18816384U JPS61104684U JP S61104684 U JPS61104684 U JP S61104684U JP 18816384 U JP18816384 U JP 18816384U JP 18816384 U JP18816384 U JP 18816384U JP S61104684 U JPS61104684 U JP S61104684U
- Authority
- JP
- Japan
- Prior art keywords
- comparator
- output
- anode current
- circuit
- reference voltage
- 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 4
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図…この考案の実施例のブロツク図、第２
図…その映像入力信号波形図、第３図…そのアノ
ード電流検出回路の出力電圧波形図、第４図…そ
の第１のコンパレータの出力電圧波形図、第５図
…その第３のコンパレータの入力波形図。
１…コントラスト調整回路、２…輝度調整回路
、３…ＣＲＴドライブ回路、４…アノード電流検
出回路、５…第１のコンパレータ、６…第１の基
準電圧Ｖ１発生器、７…積分回路、８…第２のコ
ンパレータ、９…第２の基準電圧Ｖ２発生器、１
０…制御端子。
Figure 1...Block diagram of an embodiment of this invention, Figure 2
Fig. 3: Output voltage waveform of the anode current detection circuit; Fig. 4: Output voltage waveform of the first comparator; Fig. 5: Input of the third comparator. Waveform diagram. DESCRIPTION OF SYMBOLS 1... Contrast adjustment circuit, 2... Brightness adjustment circuit, 3... CRT drive circuit, 4... Anode current detection circuit, 5... First comparator, 6... First reference voltage V1 generator, 7... Integrating circuit, 8 ...Second comparator, 9...Second reference voltage V2 generator, 1
0...Control terminal.
Claims (1)
を発生するアノード電流検出回路と、 (ロ) アノード電流検出回路の出力を第１の基準
電圧と比較する第１のコンパレータと、 (ハ) 第１のコンパレータの出力を積分する積分
回路と、 (ニ) 積分回路の出力を第２の基準電圧と比較す
る第２のコンパレータとから成り、 (ホ) 第２のコンパレータゑ出力により輝度、コ
ントラストまたは輝度およびコントラストを制御
することを特徴とするテレビジヨン受像機のドー
ミング防止回路。[Claims for Utility Model Registration] (a) An anode current detection circuit that generates a voltage proportional to the anode current of the cathode ray tube; (b) A first comparator that compares the output of the anode current detection circuit with a first reference voltage. (c) an integrating circuit that integrates the output of the first comparator; (d) a second comparator that compares the output of the integrating circuit with a second reference voltage; and (e) a second comparator. A doming prevention circuit for a television receiver characterized by controlling brightness and contrast or brightness and contrast by output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18816384U JPS61104684U (en) | 1984-12-13 | 1984-12-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18816384U JPS61104684U (en) | 1984-12-13 | 1984-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61104684U true JPS61104684U (en) | 1986-07-03 |
Family
ID=30745633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18816384U Pending JPS61104684U (en) | 1984-12-13 | 1984-12-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61104684U (en) |
-
1984
- 1984-12-13 JP JP18816384U patent/JPS61104684U/ja active Pending
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