JPH0344981U - - Google Patents
Info
- Publication number
- JPH0344981U JPH0344981U JP10350789U JP10350789U JPH0344981U JP H0344981 U JPH0344981 U JP H0344981U JP 10350789 U JP10350789 U JP 10350789U JP 10350789 U JP10350789 U JP 10350789U JP H0344981 U JPH0344981 U JP H0344981U
- Authority
- JP
- Japan
- Prior art keywords
- axis
- image
- screen
- primary color
- circuits
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Transforming Electric Information Into Light Information (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Description
第１図はこの考案に係るスクリーン表示装置の
一実施例を示す構成図、第２図は他の実施例を示
す構成図、第３図は第２図の構成を説明する説明
図である。
１Ｒ，１Ｇ，１Ｂ……映像ミユート回路、２Ｒ
，２Ｇ，２Ｂ……映像ドライブ回路、３Ｒ，３Ｇ
，３Ｂ……投写管、１１……バイアス調整回路、
１２……リレースイツチ、１３……コイル、１４
Ｒ，１４Ｇ，１４Ｂ……ミユート制御端子、Ｑ１
……トランジスタ。
FIG. 1 is a block diagram showing one embodiment of the screen display device according to the invention, FIG. 2 is a block diagram showing another embodiment, and FIG. 3 is an explanatory diagram explaining the structure of FIG. 2. 1R, 1G, 1B...Video mute circuit, 2R
, 2G, 2B...Video drive circuit, 3R, 3G
, 3B...projection tube, 11...bias adjustment circuit,
12... Relay switch, 13... Coil, 14
R, 14G, 14B...Mute control terminal, Q 1
...transistor.
Claims (1)
る各軸映像ドライブ回路と、 これら映像ドライブ回路からの信号がカソード
に供給され３原色信号の合成されたカラー画像を
スクリーンに表示するＲ，Ｇ及びＢ軸投写管と、 前記スクリーンに画像を表示する場合は前記Ｒ
，Ｇ及びＢ軸原色信号をそれぞれ前記各軸映像ド
ライブ回路に導き、前記スクリーンに画像を表示
しない場合は、各軸投写管にカツトオフ調整用の
調整信号を供給して各軸投写管のカソードにそれ
ぞれ微少電流を流すＲ，Ｇ及びＢ軸映像ミユート
回路とを具備したことを特徴とするスクリーン表
示装置。 (2) 前記Ｒ，Ｇ及びＢ軸映像ミユート回路は、
垂直ブランキング期間にのみ前記Ｒ，Ｇ及びＢ軸
映像ドライブ回路に信号を供給することで前記各
軸投写管に微少電流を流すことを特徴とする請求
項１の記載のスクリーン表示装置。[Claims for Utility Model Registration] (1) Each axis video drive circuit that amplifies the R, G, and B axis primary color signals, and the signals from these video drive circuits are supplied to the cathode to synthesize the three primary color signals. R, G and B axis projection tubes for displaying images on a screen; and when displaying an image on the screen, the R
, G and B axis primary color signals are respectively guided to the respective axis image drive circuits, and when no image is to be displayed on the screen, an adjustment signal for cut-off adjustment is supplied to each axis projection tube to the cathode of each axis projection tube. A screen display device characterized by comprising R, G and B axis image mute circuits that respectively flow minute currents. (2) The R, G and B axis video mute circuits are as follows:
2. The screen display device according to claim 1, wherein a minute current is caused to flow through each of the axis projection tubes by supplying signals to the R, G and B axis video drive circuits only during a vertical blanking period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10350789U JPH0344981U (en) | 1989-09-05 | 1989-09-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10350789U JPH0344981U (en) | 1989-09-05 | 1989-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0344981U true JPH0344981U (en) | 1991-04-25 |
Family
ID=31652339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10350789U Pending JPH0344981U (en) | 1989-09-05 | 1989-09-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0344981U (en) |
-
1989
- 1989-09-05 JP JP10350789U patent/JPH0344981U/ja active Pending
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