JPH01100577U - - Google Patents
Info
- Publication number
- JPH01100577U JPH01100577U JP19546787U JP19546787U JPH01100577U JP H01100577 U JPH01100577 U JP H01100577U JP 19546787 U JP19546787 U JP 19546787U JP 19546787 U JP19546787 U JP 19546787U JP H01100577 U JPH01100577 U JP H01100577U
- Authority
- JP
- Japan
- Prior art keywords
- control
- black level
- beam current
- level control
- connection point
- 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 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
従来例の回路図である。
３……黒レベル制御回路、４……直列回路、５
……黒レベルコントラストコントロール回路、Ｄ
２……第２スイツチングダイオード。
FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional example. 3... Black level control circuit, 4... Series circuit, 5
...Black level contrast control circuit, D
2...Second switching diode.
Claims (1)
動に対応する検出電圧を分割する第１、第２抵抗
から成る直列回路が接続され、前記両抵抗の接続
点と黒レベルコントロール回路の制御端子との間
に、スイツチングダイオードが接続され、 前記ビーム電流が所定値以下になつたときに、
前記接続点の電位変化によつて前記スイツチング
ダイオードがオンして前記制御端子には、ビーム
電流の変化に対応した黒レベル制御電圧が与えら
れることを特徴とするテレビジヨン受像機の黒レ
ベル制御回路。[Claims for Utility Model Registration] A series circuit consisting of a first and second resistor that divides a detection voltage corresponding to fluctuations in beam current is connected to a voltage detection section for ABL control, and a connection point between the two resistors is connected to the voltage detection section for ABL control. A switching diode is connected between the control terminal of the black level control circuit, and when the beam current falls below a predetermined value,
Black level control for a television receiver, characterized in that the switching diode is turned on by a potential change at the connection point, and a black level control voltage corresponding to a change in beam current is applied to the control terminal. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19546787U JPH01100577U (en) | 1987-12-22 | 1987-12-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19546787U JPH01100577U (en) | 1987-12-22 | 1987-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01100577U true JPH01100577U (en) | 1989-07-06 |
Family
ID=31486145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19546787U Pending JPH01100577U (en) | 1987-12-22 | 1987-12-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01100577U (en) |
-
1987
- 1987-12-22 JP JP19546787U patent/JPH01100577U/ja active Pending
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