JPH0132445Y2 - - Google Patents
Info
- Publication number
- JPH0132445Y2 JPH0132445Y2 JP1983135481U JP13548183U JPH0132445Y2 JP H0132445 Y2 JPH0132445 Y2 JP H0132445Y2 JP 1983135481 U JP1983135481 U JP 1983135481U JP 13548183 U JP13548183 U JP 13548183U JP H0132445 Y2 JPH0132445 Y2 JP H0132445Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- primary color
- synchronization
- composite video
- 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.)
- Expired
Links
- 239000002131 composite material Substances 0.000 claims description 19
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 2
Landscapes
- Studio Circuits (AREA)
Description
【考案の詳細な説明】
〔考案の利用分野〕
本考案は、パソコン用デイスプレイ兼用テレビ
に用いる映像信号発生装置に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a video signal generating device for use in a television that also serves as a display for a personal computer.
第１図に従来のパソコン用デイスプレイ兼用テ
レビ及びパソコンの一部の回路ブロツク図を示
す。第１図において、スイツチ２，５はテレビ又
はパソコン用デイスプレの機能に切り換えるため
の手動スイツチで、１はテレビ複合映像信号を原
色信号（赤、緑、青の情報を含む各信号）に変換
するクロマ回路、３はブラウン管を駆動するため
のビデオ出力回路、４はテレビ複合映像信号から
垂直及び水平同期信号を抽出する同期期分離回
路、６はブラウン管の画像の同期を合わせるため
の同期回路、７はパソコンの原色信号発生回路、
８はパソコンの同期信号発生回路である。このパ
ソコン用デイスプレイ兼用テレビによれば、テレ
ビ側に設けられたスイツチ２及び５を切り換える
ことによりテレビ又はパソコン用デイスプレイと
して用いることが出来る。しかし、スイツチを切
り換えるためには、その都度、テレビ側に設けら
れているスイツチを操作する必要があるため、操
作性の点で難点があつた。更に、パソコン、デイ
スプレイ兼用テレビに使用される21ピンマルチコ
ネクタでは、映像同期信号入力端は同期分離回路
の入力に接続されるため、第１図の様に同期回路
に直接外部同期信号を入力することは困難であつ
た。
FIG. 1 shows a circuit block diagram of a part of a conventional personal computer display television and personal computer. In Fig. 1, switches 2 and 5 are manual switches for switching to the functions of a television or computer display, and 1 converts a TV composite video signal into a primary color signal (signals containing red, green, and blue information). chroma circuit; 3 is a video output circuit for driving the cathode ray tube; 4 is a synchronization period separation circuit for extracting vertical and horizontal synchronization signals from the television composite video signal; 6 is a synchronization circuit for synchronizing the images of the cathode ray tube; 7 is the primary color signal generation circuit of a personal computer,
8 is a synchronization signal generation circuit of the personal computer. According to this television that can be used as a personal computer display, it can be used as a television or a personal computer display by switching the switches 2 and 5 provided on the television. However, in order to change the switch, it was necessary to operate the switch provided on the television each time, which caused difficulties in terms of operability. Furthermore, with the 21-pin multi-connector used for personal computers and display TVs, the video synchronization signal input end is connected to the input of the synchronization separation circuit, so the external synchronization signal can be input directly to the synchronization circuit as shown in Figure 1. That was difficult.
本考案の目的はパソコン用デイスプレイ兼用テ
レビとして使用されたとき操作性の優れた映像信
号発生装置を提供するにある。
An object of the present invention is to provide a video signal generating device that is easy to operate when used as a television that also serves as a display for a personal computer.
パソコンの同期信号及び原色信号を用いて複合
映像信号を作り、テレビ側で、この複合映像信号
から同期信号を抽出してブラウン管表示画像の同
期合わせを行なうこと、及びテレビ側に設けられ
ている機能切換スイツチの操作をパソコン側から
電気的に行うことにより操作性の優れたパソコン
用デイスプレイ兼用テレビを提供できる。
A composite video signal is created using the computer's synchronization signal and primary color signals, and the TV side extracts the synchronization signal from this composite video signal to synchronize the cathode ray tube display image, and the functions provided on the TV side. By electrically operating the changeover switch from the personal computer side, it is possible to provide a television that also functions as a personal computer display and has excellent operability.
第２図に本考案の一実施例を示す。第２図にお
いて、テレビ側の回路は、外部原色信号入力端子
を持つ一般的なもので、スイツチ２はブラウン管
を駆動する原色信号をテレビ又は外部の原色信号
に切り換えるスイツチ、スイツチ１０はテレビ又
は外部の複合映像信号を選択するスイツチで、１
は選択した複合映像信号を原色信号に変換するク
ロマ回路、９は選択した複合映像信号から垂直及
び水平同期信号を抽出する同期分離回路、３はブ
ラウン管を駆動するためのビデオ出力回路、６は
ブラウン管の画像の同期を合わせるための同期回
路である。一方パソコン側はスイツチ２，１０を
制御するスイツチ制御回路１２、及びパソコンの
同期信号発生回路８、原色信号発生回路７、これ
らの同期信号及び原色信号を用いてパソコン複合
映像信号を作る信号変換回路１１、で構成され
る。ここでスイツチ制御回路１２は、テレビ機能
を選択する場合はスイツチ１０をテレビ複合映像
信号側、スイツチ２をクロマ回路１の出力側に切
り換え、パソコン用デイスプレイ機能を選択する
場合はスイツチ１０をパソコン複合映像信号側、
スイツチ２をパソコン原色信号発生回路側に切り
換える。本実施例によれば、パソコンからの操作
により容易にテレビ側の機能の切り換えが出来
る。尚、パソコン用デイスプレイ機能を選択した
時、スイツチ２をクロマ回路１の出力側に切り換
えてもブラウン管にパソコン画像を表示できる
が、この場合、パソコン原色信号は、信号変換回
路１１及びクロマ回路１を経由するため通常、解
像度等の性能が劣化するため得策ではない。
FIG. 2 shows an embodiment of the present invention. In Fig. 2, the circuit on the television side is a general type having an external primary color signal input terminal, switch 2 is a switch that changes the primary color signal that drives the cathode ray tube to the primary color signal of the television or external source, and switch 10 is a switch that changes the primary color signal that drives the cathode ray tube to the primary color signal of the television or external source. A switch for selecting the composite video signal of 1.
9 is a chroma circuit that converts the selected composite video signal into a primary color signal, 9 is a sync separation circuit that extracts vertical and horizontal synchronization signals from the selected composite video signal, 3 is a video output circuit for driving a cathode ray tube, and 6 is a cathode ray tube. This is a synchronization circuit for synchronizing images. On the other hand, the PC side includes a switch control circuit 12 that controls the switches 2 and 10, a synchronization signal generation circuit 8 of the PC, a primary color signal generation circuit 7, and a signal conversion circuit that uses these synchronization signals and primary color signals to create a PC composite video signal. It consists of 11. Here, the switch control circuit 12 switches the switch 10 to the TV composite video signal side and the switch 2 to the output side of the chroma circuit 1 when selecting the TV function, and switches the switch 10 to the PC composite video signal side when selecting the PC display function. video signal side,
Switch switch 2 to the PC primary color signal generation circuit side. According to this embodiment, the functions on the television can be easily switched by operating the computer. When the PC display function is selected, the computer image can be displayed on the cathode ray tube by switching the switch 2 to the output side of the chroma circuit 1; Normally, this is not a good idea because performance such as resolution deteriorates.
本考案によれば、同期信号を一旦複合映像信号
に変換してテレビの複合映像信号入力端子に入力
しているので、21ピンマルチコネクタのような同
期回路に直接外部同期信号を入力する端子を持た
ないテレビにおいても容易にテレビ画像とパソコ
ン画像を切り換えて表示できる。また、一般的な
外部原色信号入力端子付テレビとパソコンを接続
することによりパソコン側から容易に操作できる
パソコン用デイスプレイ兼用テレビを実現するこ
とが出来る。
According to the present invention, since the synchronization signal is first converted into a composite video signal and inputted to the composite video signal input terminal of the TV, a terminal for directly inputting the external synchronization signal to the synchronization circuit such as a 21-pin multi-connector is used. Even on a TV that does not have one, it is possible to easily switch and display TV images and computer images. Furthermore, by connecting a general television with an external primary color signal input terminal to a personal computer, it is possible to realize a television that can also be used as a display for a personal computer, which can be easily operated from the personal computer side.
第１図は従来のパソコン用デイスプレイ兼用テ
レビ及びパソコンの一部を示す回路プロツク図、
第２図は本考案の一実施例を示す外部原色信号入
力端子付テレビ及びパソコンの一部を示す回路ブ
ロツク図である。
１……クロマ回路、２……原色信号選択スイツ
チ、３……ビデオ出力回路、４……同期分離回
路、５……同期信号切換スイツチ、６……同期回
路、７……パソコン原色信号発生回路、８……パ
ソコン同期信号発生回路、９……同期分離回路、
１０……複合映像信号切換スイツチ、１１……信
号変換回路、１２……スイツチ制御回路。
Figure 1 is a circuit block diagram showing a part of a conventional personal computer display television and personal computer.
FIG. 2 is a circuit block diagram showing a part of a television and a personal computer with an external primary color signal input terminal, showing an embodiment of the present invention. 1...Chroma circuit, 2...Primary color signal selection switch, 3...Video output circuit, 4...Sync separation circuit, 5...Sync signal selection switch, 6...Sync circuit, 7...PC primary color signal generation circuit , 8... Personal computer synchronization signal generation circuit, 9... Synchronization separation circuit,
10...Composite video signal changeover switch, 11...Signal conversion circuit, 12...Switch control circuit.
Claims (1)
合映像信号から第１の原色信号に変換する第１の
変換回路と、 前記第１の複合映像信号が入力され、前記第１
の複合映像信号から同期信号を分離し、同期信号
を同期回路に供給する同期分離回路と、 第２の原色信号を発生する原色信号発生手段
と、前記第１の原色信号と、前記第２の原色信号
を切替てビデオ出力回路に供給する第１のスイツ
チと、前記同期回路および前記ビデオ出力回路に
接続された表示手段と、 同期信号を発生する同期信号発生手段と、 前記第２の原色信号と前記同期信号から第２の
複合映像信号を発生する第２の変換回路と、 前記第１の複合映像信号と前記第２の複合映像
信号を切替て前記同期分離回路に供給する第２の
スイツチ を備えた映像信号発生装置。[Claims for Utility Model Registration] A first conversion circuit that receives a first composite video signal and converts the first composite video signal into a first primary color signal; and said first
a sync separation circuit that separates a sync signal from a composite video signal and supplies the sync signal to a sync circuit; primary color signal generating means that generates a second primary color signal; a first switch that switches the primary color signal and supplies it to the video output circuit; display means connected to the synchronization circuit and the video output circuit; synchronization signal generation means that generates the synchronization signal; and the second primary color signal. and a second conversion circuit that generates a second composite video signal from the synchronization signal; and a second switch that switches between the first composite video signal and the second composite video signal and supplies the same to the synchronization separation circuit. A video signal generator equipped with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983135481U JPS6043077U (en) | 1983-09-02 | 1983-09-02 | Video signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983135481U JPS6043077U (en) | 1983-09-02 | 1983-09-02 | Video signal generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6043077U JPS6043077U (en) | 1985-03-26 |
| JPH0132445Y2 true JPH0132445Y2 (en) | 1989-10-04 |
Family
ID=30304925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983135481U Granted JPS6043077U (en) | 1983-09-02 | 1983-09-02 | Video signal generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6043077U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57101479A (en) * | 1980-12-16 | 1982-06-24 | Matsushita Electric Ind Co Ltd | Signal switching device for television receiver |
-
1983
- 1983-09-02 JP JP1983135481U patent/JPS6043077U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57101479A (en) * | 1980-12-16 | 1982-06-24 | Matsushita Electric Ind Co Ltd | Signal switching device for television receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6043077U (en) | 1985-03-26 |
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