JPS61100081U - - Google Patents
Info
- Publication number
- JPS61100081U JPS61100081U JP18422784U JP18422784U JPS61100081U JP S61100081 U JPS61100081 U JP S61100081U JP 18422784 U JP18422784 U JP 18422784U JP 18422784 U JP18422784 U JP 18422784U JP S61100081 U JPS61100081 U JP S61100081U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- video
- horizontal
- synchronization
- 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
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Landscapes
- Synchronizing For Television (AREA)
Description
第１図は本考案に係る画面表示回路を示すブロ
ツク図、第２図は本考案の一実施例を示す具体的
な回路図、第３図は本考案の他の実施例を示す具
体的な回路図、第４図は従来の画面表示回路を示
すブロツク図である。
１…映像検波回路、２…映像増幅回路、３…受
像管ドライブ回路、４…受像管、５…信号検出回
路、６…スイツチ回路、７…同期分離回路、８…
水平発振回路、９…垂直発振回路、１０…画面表
示信号発生回路。
FIG. 1 is a block diagram showing a screen display circuit according to the present invention, FIG. 2 is a specific circuit diagram showing one embodiment of the present invention, and FIG. 3 is a specific circuit diagram showing another embodiment of the present invention. Circuit Diagram: FIG. 4 is a block diagram showing a conventional screen display circuit. DESCRIPTION OF SYMBOLS 1... Video detection circuit, 2... Video amplifier circuit, 3... Picture tube drive circuit, 4... Picture tube, 5... Signal detection circuit, 6... Switch circuit, 7... Synchronization separation circuit, 8...
Horizontal oscillation circuit, 9... Vertical oscillation circuit, 10... Screen display signal generation circuit.
Claims (1)
期信号を含む映像信号を再生、増幅して受像管へ
出力する映像再生回路と、 この映像再生回路より取り出した映像信号から
水平及び垂直の同期信号を分離するための同期分
離回路と、 この同期分離回路からの同期信号に基づいて水
平及び垂直発振して水平及び垂直ブランキングパ
ルスを作成するための発振回路と、 この発振回路からの前記水平及び垂直ブランキ
ングパルスにて決まるタイミングで、文字や図形
等の表示信号を発生して前記映像再生回路の出力
段に加え前記受像管画面上に表示するための画面
表示信号発生回路と、 前記映像再生回路を通過する信号が同期信号を
含む正規の映像信号であるか否かを判定し、その
判定結果を示す信号を出力する信号検出回路と、 この信号検出回路が正規信号以外の信号状態で
あると判定したときにその判定信号にて前記映像
再生回路から前記同期分離回路への信号供給を遮
断するためのスイツチ回路とを具備したことを特
徴とする画面表示回路。[Scope of Claim for Utility Model Registration] A video reproducing circuit that inputs a television broadcast signal, reproduces and amplifies a video signal including a synchronizing signal from this signal, and outputs it to a picture tube; and a video signal extracted from this video reproducing circuit. a synchronization separation circuit for separating horizontal and vertical synchronization signals; an oscillation circuit for generating horizontal and vertical blanking pulses by performing horizontal and vertical oscillation based on the synchronization signals from the synchronization separation circuit; Generating a screen display signal for generating a display signal for characters, figures, etc. at a timing determined by the horizontal and vertical blanking pulses from the circuit, and displaying the signal on the picture tube screen in addition to the output stage of the video reproduction circuit. a signal detection circuit that determines whether a signal passing through the video reproduction circuit is a regular video signal including a synchronization signal and outputs a signal indicating the determination result; and a switch circuit for cutting off the signal supply from the video reproduction circuit to the synchronization separation circuit using the determination signal when it is determined that the signal state is other than the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18422784U JPS61100081U (en) | 1984-12-06 | 1984-12-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18422784U JPS61100081U (en) | 1984-12-06 | 1984-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61100081U true JPS61100081U (en) | 1986-06-26 |
Family
ID=30741712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18422784U Pending JPS61100081U (en) | 1984-12-06 | 1984-12-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61100081U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56128076A (en) * | 1980-03-11 | 1981-10-07 | Mitsubishi Electric Corp | Trigger circuit |
-
1984
- 1984-12-06 JP JP18422784U patent/JPS61100081U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56128076A (en) * | 1980-03-11 | 1981-10-07 | Mitsubishi Electric Corp | Trigger circuit |
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