JPS5859270U - Video display device - Google Patents
Video display deviceInfo
- Publication number
- JPS5859270U JPS5859270U JP11577382U JP11577382U JPS5859270U JP S5859270 U JPS5859270 U JP S5859270U JP 11577382 U JP11577382 U JP 11577382U JP 11577382 U JP11577382 U JP 11577382U JP S5859270 U JPS5859270 U JP S5859270U
- Authority
- JP
- Japan
- Prior art keywords
- display image
- circuit
- video signal
- display
- image
- 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
Landscapes
- Studio Circuits (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の映像表示装置のブロック線図、第２図は
同装置の要部の回路図、第３図ａ、 ｂ。
Ｃは同装置の動作を説明するための波形図、第４図は同
装置における表示状態を示す同装置の正面 、図、第５
図は本発明の一実施例における映像表示装置の回路図、
第６図ａ、 ｂ、 ｃ、第７図ａ、 ｂ。
ｃ１第８図ａ、 ｂ、 ｃはそれぞれ同装置の動作
を説明するための波形図および特性図、第９図は本発明
の他の実施例における映像表示装置の回路図、第１０図
は同装置における表示状態を示す同装置の正面図である
。
５・・・・・・映像増幅回路、６・・・・・′・陰極線
管、７・・・・・・映像信号発生回路、８・・・・・・
合成回路、９，１０゜１５・・・・・・合成用トランジ
スタ、１６．１７・・・・・・選択動作用のトランジス
タ、１８・・・・・・制御回路、 ２１°＠１１＄１
１４″Ｆ’５ＤＩ１． 第、。FIG. 1 is a block diagram of a conventional video display device, FIG. 2 is a circuit diagram of the main parts of the device, and FIGS. 3a and 3b. C is a waveform diagram for explaining the operation of the device, and FIG. 4 is a front view of the device showing the display state in the device.
The figure is a circuit diagram of a video display device according to an embodiment of the present invention.
Figure 6 a, b, c, Figure 7 a, b. c1 Figures 8a, b, and c are waveform diagrams and characteristic diagrams for explaining the operation of the same device, respectively. Figure 9 is a circuit diagram of a video display device in another embodiment of the present invention, and Figure 10 is the same. FIG. 2 is a front view of the device showing a display state in the device. 5...Video amplification circuit, 6...'Cathode ray tube, 7...Video signal generation circuit, 8...
Synthesis circuit, 9,10°15... Transistor for synthesis, 16.17... Transistor for selection operation, 18... Control circuit, 21° @ 11$1
14″F'5DI1. No.
Claims (1)
するテレビジョン受像回路と、上記受信画像以外の表示
画像をあられす表示画像用映像信号を発生して上記陰極
線管にこの表示画像を映出する映像信号発生回路とを備
え、上記テレビジヨシ受像回路の出力信号と上記映像信
号発生回路の出力信号とを合成して上記陰極線管に上記
受信画像と上記表示画像とを重畳して映出するようにす
るとともに、上記映像信号発生回路からの出力信号をそ
のままの極性で上記合成回路に加えるか極性反転して上
記合成回路に加えるかを切換えるスイッチングトランジ
スタと、上記受信画像のうち少べとも上記表示画像を表
示する部分の平均輝度レベルを検出し、その平均輝度レ
ベルが低いときには表示画像を白抜きで表示しその平均
輝度レベルが高いときには表示画像を黒色で表示するよ
うに上記スイッチングトランジスタを自動的にスイッチ
ングする制御回路とを備えた映像表示装置。a television receiver circuit that receives a television signal and projects the received image on the cathode ray tube; and a television receiver circuit that generates a display image video signal that displays a display image other than the received image and projects this display image on the cathode ray tube. and a video signal generation circuit for outputting a video signal, and synthesizes the output signal of the television receiver circuit and the output signal of the video signal generation circuit, and displays the received image and the display image in a superimposed manner on the cathode ray tube. and a switching transistor for switching whether to apply the output signal from the video signal generation circuit to the synthesis circuit with the same polarity or to invert the polarity and apply it to the synthesis circuit, and at least one of the above received images. The switching transistor is automatically configured to detect the average brightness level of the area where the display image is displayed, and to display the display image in white when the average brightness level is low, and to display the display image in black when the average brightness level is high. A video display device equipped with a control circuit that switches automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11577382U JPS5859270U (en) | 1982-07-29 | 1982-07-29 | Video display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11577382U JPS5859270U (en) | 1982-07-29 | 1982-07-29 | Video display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5859270U true JPS5859270U (en) | 1983-04-21 |
Family
ID=29910028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11577382U Pending JPS5859270U (en) | 1982-07-29 | 1982-07-29 | Video display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5859270U (en) |
-
1982
- 1982-07-29 JP JP11577382U patent/JPS5859270U/en active Pending
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