JPH02127688A - Control system for cathode-ray tube display device - Google Patents
Control system for cathode-ray tube display deviceInfo
- Publication number
- JPH02127688A JPH02127688A JP63281900A JP28190088A JPH02127688A JP H02127688 A JPH02127688 A JP H02127688A JP 63281900 A JP63281900 A JP 63281900A JP 28190088 A JP28190088 A JP 28190088A JP H02127688 A JPH02127688 A JP H02127688A
- Authority
- JP
- Japan
- Prior art keywords
- display device
- main body
- control signal
- ray tube
- crt display
- 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
- 238000000034 method Methods 0.000 claims description 12
- 230000010365 information processing Effects 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Controls And Circuits For Display Device (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は陰極線管（以下ＣＲＴと略す）表示装置制御方
式、特に、複数の水平周波数、垂直周波数において動作
可能なＣＲＴ表示装置制御方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cathode ray tube (hereinafter abbreviated as CRT) display device control system, and particularly to a CRT display device control system that can operate at a plurality of horizontal and vertical frequencies.
従来、この種の複数の水平・垂直周波数において動作可
能なＣＲＴ表示装置においては、ＣＲＴ表示装置側に水
平周波数に対する共振回路が有り、入力された信号の水
平周波数を識別し識別された結果によって同期回路の定
数を切換えることにより、同期をとる方式が公知である
。Conventionally, in this type of CRT display device that can operate at multiple horizontal and vertical frequencies, there is a resonant circuit for the horizontal frequency on the CRT display device side, which identifies the horizontal frequency of the input signal and synchronizes based on the identified result. A known method is to achieve synchronization by switching circuit constants.
一方、本体側から同期に関する情報を伝達する方式もあ
るが、水平同期信号、垂直同期信号の極性の組み合せに
おいて、ＣＲＴ表示装置側に伝達する方式のみが公知で
あった。On the other hand, although there is a method of transmitting synchronization-related information from the main body side, only a method of transmitting information about the synchronization to the CRT display device side is known in the art in terms of a combination of polarities of a horizontal synchronization signal and a vertical synchronization signal.
一方、ＣＲＴ表示装置の装置識別信号が信号線を追加す
ることにより本体側へ伝達される方式については従来よ
り公知である。On the other hand, a method in which the device identification signal of a CRT display device is transmitted to the main body by adding a signal line is conventionally known.
上述した従来ののＣＲＴ表示装置制御方式には、以下の
様な欠点がある。The conventional CRT display control method described above has the following drawbacks.
第一に、ＣＲＴ表示装置側において、水平周波数を識別
する方式では、識別回路が高価なものになること、周波
数が接近していると識別できないこと、水平・垂直周波
数が同一で画面の大きさ等を変えた表示状態を指定でき
ないことなどの欠点がある。First, on the CRT display device side, with the method of identifying the horizontal frequency, the identification circuit is expensive, it is impossible to identify if the frequencies are close, and the screen size is too large when the horizontal and vertical frequencies are the same. There are drawbacks such as the inability to specify a display state that changes the etc.
第二に、同期信号の極性により本体から指定する方法に
おいては、指定可能な組合せが４種類のみに限定される
という欠点があり、また極性を識別する回路も少し効果
になるという欠点がある。Second, the method of specifying from the main body using the polarity of the synchronization signal has the disadvantage that the specifiable combinations are limited to only four types, and the circuit for identifying polarity is also somewhat ineffective.
第三に、装置識別信号を別の信号線により、本体に伝達
する方式については、追加した信号を本目的のみしか使
用していないので、非効率的であるという欠点がある。Thirdly, the method of transmitting the device identification signal to the main body through a separate signal line has the disadvantage that it is inefficient because the added signal is used only for this purpose.
本発明のＣＲＴ表示装置制御方式は、水平周波数と垂直
周波数との複数の組合せにおいて動作可能の陰極線管表
示装置と前記周波数の複数の組合せを駆動可能な情報処
理装置本体との間に接続される陰極線管制御方式におい
て、前記陰極線管表示装置自体の装置識別信号と前記周
波数の組合せを指定する指定信号との伝達する双方向の
制御信号作成手段と、前記双方向制御信号の方向を制御
しかつ本信号の変化点において前記指定信号のラッチの
タイミングを指示する指示信号作成手段とを含んで構成
される。The CRT display device control method of the present invention is connected between a cathode ray tube display device that can operate at multiple combinations of horizontal frequencies and vertical frequencies and an information processing device main body that can drive multiple combinations of the frequencies. In the cathode ray tube control method, a bidirectional control signal generating means for transmitting a device identification signal of the cathode ray tube display device itself and a designation signal specifying the combination of frequencies; and instruction signal generation means for instructing the latch timing of the specified signal at a change point of the main signal.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
第１図において、１は情報処理装置本体、２はＣＲＴ表
示装置である。３〜７は本体とＣＲＴ表示装置本体との
間の制御信号であるが、３は映像信号、４は水平同期信
号、５は垂直同期信号、６は本発明でいう双方向の制御
信号、７は方向制御信号である。く３〜５は通常のＣＲ
Ｔ表示装置制御に使用する信号であり、６，７は本発明
の特徴とする制御信号である。）
制御信号６は情報処理装置本体１側においては入力バッ
ファ８．出力バツフア９に接続されており、ＣＲ７表示
装置２側では出力バッファ９とラッチ１０に接続されて
いる。In FIG. 1, 1 is an information processing device main body, and 2 is a CRT display device. 3 to 7 are control signals between the main body and the CRT display device main body, and 3 is a video signal, 4 is a horizontal synchronization signal, 5 is a vertical synchronization signal, 6 is a bidirectional control signal as used in the present invention, and 7 is the direction control signal. 3 to 5 are normal CR
These are signals used to control the T display device, and 6 and 7 are control signals that characterize the present invention. ) The control signal 6 is sent to the input buffer 8. on the information processing device main body 1 side. It is connected to the output buffer 9, and is connected to the output buffer 9 and latch 10 on the CR7 display device 2 side.
制御信号６は識別番号と同期周波数の組合せの数のビッ
ト数に応じて複数設けられる。A plurality of control signals 6 are provided depending on the number of bits of the combination of the identification number and the synchronization frequency.
方向制御信号７は出力バッファ９のイネーブル端子とラ
ッチ１０のクロックに接続されている。Direction control signal 7 is connected to the enable terminal of output buffer 9 and to the clock of latch 10.
同期周波数を設定する時は方向制御信号７をＬレベルに
することにより、制御信号６の方向を情報処理装置本体
、１からＣＲ７表示装置２にし、あらかじめ仕様で決ま
った数値をＣＲ７表示装置２に伝達する。ＣＲ７表示装
置２側では方向制御信号７の立上りでこの数値をラッチ
１０によりラッチする。ラッチされた信号は同期回路１
１に接続され、この信号により同期回路は同期する周波
数を切換える。When setting the synchronization frequency, set the direction control signal 7 to L level, change the direction of the control signal 6 from the information processing device main body 1 to the CR7 display device 2, and set the value determined in advance on the specifications to the CR7 display device 2. introduce. On the CR7 display device 2 side, this numerical value is latched by a latch 10 at the rising edge of the direction control signal 7. The latched signal is synchronous circuit 1
1, and this signal causes the synchronization circuit to switch the frequency to be synchronized.
ＣＲＴ装置識別番号を伝達する時は、方向制御信号７を
Ｈレベルにすることにより制御信号６の方向をＣＲ７表
示装置２から情報処理装置本体１へにして、あらかじめ
決定しである装置固有の番号を情報処理装置本体】側に
出力する。情報処理装置本体１側では、この信号を確認
し、接続しであるＣＲ７表示装置２の種類を識別し、Ｃ
ＲＴがカラーか、モノクロか、どの解像度まで表示でき
るか等を判断し、本体の動作状態を決定することができ
る。When transmitting the CRT device identification number, set the direction control signal 7 to H level to change the direction of the control signal 6 from the CR7 display device 2 to the information processing device main body 1, and transmit the device-specific number determined in advance. is output to the main body of the information processing device. The information processing device main body 1 side checks this signal, identifies the type of the connected CR7 display device 2, and displays the CR7 display device 2.
It is possible to determine whether the RT is in color or monochrome, what resolution it can display, etc., and determine the operating state of the main body.
以上説明したように本発明は、双方向の制御信号を、本
体とＣＲＴ表示装置との間に追加することにより、本体
とＣＲ７表示装置間のデータの交換を可能にし、安価に
複数の表示状態をＣＲＴ表示装置に表示できる効果があ
る。As explained above, the present invention enables data exchange between the main body and the CR7 display device by adding a bidirectional control signal between the main body and the CRT display device, and allows multiple display states to be displayed at low cost. This has the effect that it can be displayed on a CRT display device.
第１図は本発明の一実施例のブロック図である。
１・・・情報処理装置本体、２・・・ＣＲＴ表示装置、
３・・・映像信号、４・・・水平同期信号、５・・・垂
直同期信号、６・・・制御信号、７・・・方向制御信号
、８・・・入力Ｂ ｕ ｆ ｆ ｅ ｒ、９・・・出力
Ｂｕｆｆｅｒ、１０−・。
ラッチ、１１・・・同期回路、１２・・・インタフェー
ス回路、１３・・・インタフェース回路。FIG. 1 is a block diagram of one embodiment of the present invention. 1... Information processing device main body, 2... CRT display device,
3... Video signal, 4... Horizontal synchronization signal, 5... Vertical synchronization signal, 6... Control signal, 7... Direction control signal, 8... Input Bu f f e r, 9... Output Buffer, 10-. Latch, 11... Synchronous circuit, 12... Interface circuit, 13... Interface circuit.
Claims (1)
可能の陰極線管表示装置と前記周波数の複数の組合せを
駆動可能な情報処理装置本体との間に接続される陰極線
管制御方式において、前記陰極線管表示装置自体の装置
識別信号と前記周波数の組合せを指定する指定信号との
伝達する双方向の制御信号作成手段と、前記双方向制御
信号の方向を制御しかつ本信号の変化点において前記指
定信号のラッチのタイミングを指示する指示信号作成手
段とを含んでいることを特徴とする陰極線管表示装置制
御方式。In a cathode ray tube control method connected between a cathode ray tube display device capable of operating at a plurality of combinations of horizontal frequencies and vertical frequencies and an information processing device main body capable of driving the plurality of combinations of frequencies, the cathode ray tube display bidirectional control signal generating means for transmitting a device identification signal of the device itself and a designation signal specifying the combination of frequencies; 1. A cathode ray tube display device control method, comprising instruction signal generation means for instructing latch timing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63281900A JPH02127688A (en) | 1988-11-07 | 1988-11-07 | Control system for cathode-ray tube display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63281900A JPH02127688A (en) | 1988-11-07 | 1988-11-07 | Control system for cathode-ray tube display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02127688A true JPH02127688A (en) | 1990-05-16 |
Family
ID=17645524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63281900A Pending JPH02127688A (en) | 1988-11-07 | 1988-11-07 | Control system for cathode-ray tube display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02127688A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0744146A (en) * | 1993-07-16 | 1995-02-14 | Internatl Business Mach Corp <Ibm> | Method for forming indentification signal regarding display device and display device |
| JPH11202834A (en) * | 1998-01-08 | 1999-07-30 | Sony Corp | Liquid crystal display device |
| US6057812A (en) * | 1992-02-20 | 2000-05-02 | Hitachi, Ltd. | Image display apparatus which both receives video information and outputs information about itself |
| US6513088B2 (en) | 1993-02-10 | 2003-01-28 | Hitachi, Ltd. | Display unit and method enabling bi-directional communication with video source |
| KR100386773B1 (en) * | 1999-06-03 | 2003-06-09 | 마쯔시다덴기산교 가부시키가이샤 | Display Device, Computer and Computer System |
| JP2005292677A (en) * | 2004-04-05 | 2005-10-20 | Matsushita Electric Ind Co Ltd | Display control apparatus and display control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341903A (en) * | 1976-09-29 | 1978-04-15 | Hochiki Co | Data signal transmission and receiving method |
| JPS5771034A (en) * | 1980-10-20 | 1982-05-01 | Ricoh Co Ltd | Bus conflict preventing circuit |
| JPS60125884A (en) * | 1983-12-13 | 1985-07-05 | 株式会社リコー | Crt display unit for information processing system |
| JPS61290529A (en) * | 1985-06-19 | 1986-12-20 | Fujitsu Ltd | display control device |
-
1988
- 1988-11-07 JP JP63281900A patent/JPH02127688A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341903A (en) * | 1976-09-29 | 1978-04-15 | Hochiki Co | Data signal transmission and receiving method |
| JPS5771034A (en) * | 1980-10-20 | 1982-05-01 | Ricoh Co Ltd | Bus conflict preventing circuit |
| JPS60125884A (en) * | 1983-12-13 | 1985-07-05 | 株式会社リコー | Crt display unit for information processing system |
| JPS61290529A (en) * | 1985-06-19 | 1986-12-20 | Fujitsu Ltd | display control device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6348904B1 (en) | 1992-02-20 | 2002-02-19 | Hitachi, Ltd. | Computer apparatus for sending video information to an image display apparatus and receiving information from the image display apparatus |
| US6057812A (en) * | 1992-02-20 | 2000-05-02 | Hitachi, Ltd. | Image display apparatus which both receives video information and outputs information about itself |
| US6078301A (en) * | 1992-02-20 | 2000-06-20 | Hitachi, Ltd. | Computer apparatus for sending video information to an image display apparatus and receiving information from the image display apparatus |
| US6304236B1 (en) | 1992-02-20 | 2001-10-16 | Hitachi Ltd. | Display apparatus for adjusting the display image using a control signal from an external computer |
| US6346930B2 (en) | 1992-02-20 | 2002-02-12 | Hitachi, Ltd. | Computer apparatus for sending video information to an image display apparatus and receiving information from the image display apparatus |
| US6639588B2 (en) | 1992-02-20 | 2003-10-28 | Hitachi, Ltd. | Image display apparatus |
| US6686895B2 (en) | 1992-02-20 | 2004-02-03 | Hitachi, Ltd. | Display unit for displaying an image based on a video signal received from a personal computer which is connected to an input device |
| US6513088B2 (en) | 1993-02-10 | 2003-01-28 | Hitachi, Ltd. | Display unit and method enabling bi-directional communication with video source |
| US6549970B2 (en) | 1993-02-10 | 2003-04-15 | Hitachi, Ltd. | Display unit with controller enabling bi-directional communication with computer |
| JPH0744146A (en) * | 1993-07-16 | 1995-02-14 | Internatl Business Mach Corp <Ibm> | Method for forming indentification signal regarding display device and display device |
| JPH11202834A (en) * | 1998-01-08 | 1999-07-30 | Sony Corp | Liquid crystal display device |
| KR100386773B1 (en) * | 1999-06-03 | 2003-06-09 | 마쯔시다덴기산교 가부시키가이샤 | Display Device, Computer and Computer System |
| JP2005292677A (en) * | 2004-04-05 | 2005-10-20 | Matsushita Electric Ind Co Ltd | Display control apparatus and display control method |
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