JPS61174274U - - Google Patents
Info
- Publication number
- JPS61174274U JPS61174274U JP5614785U JP5614785U JPS61174274U JP S61174274 U JPS61174274 U JP S61174274U JP 5614785 U JP5614785 U JP 5614785U JP 5614785 U JP5614785 U JP 5614785U JP S61174274 U JPS61174274 U JP S61174274U
- Authority
- JP
- Japan
- Prior art keywords
- color
- brightness adjustment
- color signal
- circuit
- primary color
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Receiver Circuits (AREA)
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案に係るＣＲＴカラーデイスプレ
イの輝度調整回路の実施例を示す回路図、第２図
は従来のＣＲＴカラーデイスプレイの輝度調整回
路を示す回路図である。
１……輝度調整用ボリユーム、３，４，１６，
１７……トランジスタ、７……カツトオフスイツ
チ、１０，１１，１２……抵抗、１３，１４，１
５……Ｒ軸、Ｇ軸、Ｂ軸出力回路、１８……カツ
トオフ調整用ボリユーム。
FIG. 1 is a circuit diagram showing an embodiment of a brightness adjustment circuit for a CRT color display according to the present invention, and FIG. 2 is a circuit diagram showing a conventional brightness adjustment circuit for a CRT color display. 1... Brightness adjustment volume, 3, 4, 16,
17... Transistor, 7... Cut-off switch, 10, 11, 12... Resistor, 13, 14, 1
5... R-axis, G-axis, B-axis output circuit, 18... Volume for cut-off adjustment.
Claims (1)
タのベースに入力しカラー受像管の三軸カソード
に出力可能とすると共に、前記色出力トランジス
タの各エミツタ電圧を可変することによつて前記
受像管の各カソード電圧を別個に調整可能とする
カツトオフ調整用ボリユームを備えた原色信号出
力回路と、 輝度調整用ボリユームを備え前記色出力トラン
ジスタの各エミツタに接続してそのバイアスを電
気的に可変することによつて前記原色信号出回路
における各色信号の輝度レベルを調整可能とする
輝度調整回路と、 前記原色信号出力回路の前記色出力トランジス
タの各エミツタと前記輝度調整回路の出力端間に
夫々接続して設けられ、前記輝度調整用ボリユー
ムを変化させた時前記原色信号出力回路に流れる
電流が前記カラー受像管のドライブレシオと概略
同等な電流比で流れるように抵抗比が設定される
第１、第２、第３の抵抗と、 前記輝度調整回路の出力端と前記第１、第２、
第３の抵抗の共通接続点間の接続を接断可能とす
る操作スイツチとを具備したことを特徴とするＣ
ＲＴカラーデイスプレイの輝度調整回路。[Claims for Utility Model Registration] Each primary color signal of red, green, and blue is input to the base of each color output transistor so that it can be output to the triaxial cathode of a color picture tube, and the emitter voltage of each color output transistor is variable. a primary color signal output circuit equipped with a cut-off adjustment volume that makes it possible to separately adjust each cathode voltage of the picture tube; and a brightness adjustment volume connected to each emitter of the color output transistor. a brightness adjustment circuit that can adjust the brightness level of each color signal in the primary color signal output circuit by electrically varying a bias; and each emitter of the color output transistor of the primary color signal output circuit and the brightness adjustment circuit. The resistance ratio is such that when the brightness adjustment volume is changed, the current flowing through the primary color signal output circuit flows at a current ratio approximately equal to the drive ratio of the color picture tube. first, second, and third resistors to which are set; and an output terminal of the brightness adjustment circuit and the first, second, and
C characterized in that it is equipped with an operation switch that can disconnect or disconnect the connection between the common connection points of the third resistor.
Brightness adjustment circuit for RT color display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985056147U JPH0342787Y2 (en) | 1985-04-17 | 1985-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985056147U JPH0342787Y2 (en) | 1985-04-17 | 1985-04-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61174274U true JPS61174274U (en) | 1986-10-30 |
| JPH0342787Y2 JPH0342787Y2 (en) | 1991-09-06 |
Family
ID=30579470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985056147U Expired JPH0342787Y2 (en) | 1985-04-17 | 1985-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0342787Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49115233A (en) * | 1973-02-15 | 1974-11-02 |
-
1985
- 1985-04-17 JP JP1985056147U patent/JPH0342787Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49115233A (en) * | 1973-02-15 | 1974-11-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0342787Y2 (en) | 1991-09-06 |
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