JPS61100791A - Crt display unit - Google Patents

Crt display unit

Info

Publication number
JPS61100791A
JPS61100791A JP59224853A JP22485384A JPS61100791A JP S61100791 A JPS61100791 A JP S61100791A JP 59224853 A JP59224853 A JP 59224853A JP 22485384 A JP22485384 A JP 22485384A JP S61100791 A JPS61100791 A JP S61100791A
Authority
JP
Japan
Prior art keywords
crt display
switching
display device
lines
video signal
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.)
Granted
Application number
JP59224853A
Other languages
Japanese (ja)
Other versions
JPH0260194B2 (en
Inventor
昭夫 筒井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP59224853A priority Critical patent/JPS61100791A/en
Priority to AU45169/85A priority patent/AU578194B2/en
Priority to CA000487521A priority patent/CA1244932A/en
Priority to PH32601A priority patent/PH23162A/en
Priority to US06/766,334 priority patent/US4684987A/en
Priority to EP85306071A priority patent/EP0173554B1/en
Priority to DE8585306071T priority patent/DE3584704D1/en
Priority to KR1019850006321A priority patent/KR890004223B1/en
Priority to ES85546620A priority patent/ES8700767A1/en
Priority to BR8504215A priority patent/BR8504215A/en
Publication of JPS61100791A publication Critical patent/JPS61100791A/en
Publication of JPH0260194B2 publication Critical patent/JPH0260194B2/ja
Granted legal-status Critical Current

Links

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

【発明の詳細な説明】 〈産業上の利用分野〉 本発明はパーソナルコンピュータ等の電子機器の表示に
用いられるCRT表示装置において、その走歪線敢を4
00ラインと200ラインとに自動切換可能にするもの
に関する。
[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to a CRT display device used for displaying electronic equipment such as a personal computer.
This invention relates to automatic switching between the 00 line and the 200 line.

〈従来技術〉 近年、パーソナルコンピュータ等の電子計算機では、そ
の漢字表示を可能にするためにグラフ5cツク機能の高
性能化が進行しており、これ−らの多くは320X20
0ドツト及び640X200ドツトあるいは640X4
00ドツトの解像度を有する映隊出力が出ている。
<Prior Art> In recent years, the graphing function of electronic computers such as personal computers has been improved to enable display of kanji characters, and many of these are 320x20.
0 dot and 640X200 dot or 640X4
The video output has a resolution of 0.00 dots.

このグラフィック表示て対応するCRT表示装置は、3
20x200ドツト及び640X200ドツトのものに
おいては、その走査線数が一般に市販されているテレビ
ジョン受像機の走亙線故230ライン以下なので、CR
T表示装置として使用する際に改良する点が少なく、特
に家庭用においては、テレビジョン受像(幾と兼用する
場合も多い〇 一方、640X400ドツトの表示を行なうCRT表示
装置においては、その走査線数が多くなるため、原理的
には垂直偏向周波数を下げる必要がある。実際には、垂
直偏向周波数はブラウン管のフリッカを防止するために
あlり低下させることはできず、例えば200ラインの
60Hzに対して50〜55Hz程にしか下げら瓦ない
1.そのため水モ偏向周波数を上げる必要があり、20
0ラインの15.75KHz  に対して22.73K
Hz程上昇させられる。そのだめ、通常のテレビジョン
受像機とはその垂直、水平偏向周波数が大きく異なるた
め、CRT表示装置は専用化されることが多い、J したがって、このような400ラインの受像機は特に家
庭用においてはその需要が少なく高価なものとなり易い
ものであった。
The CRT display device that supports this graphic display is 3
For 20x200 dots and 640x200 dots, the number of scanning lines is less than 230 lines due to the scanning line of commercially available television receivers, so CR
There are few points to be improved when used as a T display device, especially for home use.On the other hand, in a CRT display device that displays 640 x 400 dots, the scanning line In principle, the vertical deflection frequency must be lowered because the number of lines increases.In practice, the vertical deflection frequency cannot be lowered too much to prevent cathode ray tube flicker, for example, 60Hz for 200 lines. 1. Therefore, it is necessary to increase the water deflection frequency,
22.73K compared to 15.75KHz of 0 line
It can be raised by about Hz. However, since their vertical and horizontal deflection frequencies are significantly different from those of ordinary television receivers, CRT display devices are often dedicated. There was little demand for them and they tended to be expensive.

く目的シ・ 本発明は上記欠点を除去するものであり、走査線数を2
00ラインと400ラインとに自由に切換えすることの
できるCRT表示装置を提供するものである。
Purpose: The present invention eliminates the above drawbacks and reduces the number of scanning lines to 2.
To provide a CRT display device that can freely switch between 00 lines and 400 lines.

〈実施例〉 以下、本発明の一実施例を図面に従って説明す訓   
   ると、第1図は、走査線数200ラインと400
ラインの切換を行なう基本構成を示すブロック図であり
、画1象出力装置であるパーソナルコンピュータ1より
出力される映像信号V中には、第2図(b)に示すよう
にその輝度信号成分中の垂直・諦i腺消去期間R中に、
400ライン判別用の判別パルスPが重量されるもので
あり、これは400ライン判別回路2に入力され、垂直
帰線消去期間中のパルスの有無を検出し、400ライン
であれば出力信号Cを送出し積分回路よりなる直流変換
回路3により所定レベルの制御電圧が送出される1、こ
れによってトランスタップの切換えにより偏向コイルイ
ンピーダンス切換回路4と、共振容量の切換により水平
出力線の調γ回路5と、AFCパルスの位相切換により
水平位置浦正回路6と、さらに特定数切換にエリ垂直振
幅切換回路7と、同期ボリューム定数の切換により垂直
同期切換回路8とを動作させることにより、200ライ
ンモードより400ラインモードへ走査線数を切換え、
映像信号処理回路9を通じてCRTIOに供給する映像
信号を画面上に表示しているものである。
<Example> Hereinafter, an example of the present invention will be explained according to the drawings.
Then, in Figure 1, the number of scanning lines is 200 lines and 400 lines.
This is a block diagram showing the basic configuration for switching lines, and the video signal V output from the personal computer 1, which is an image output device, includes a luminance signal component as shown in FIG. 2(b). During the vertical/gland elimination period R,
The discrimination pulse P for 400 line discrimination is inputted to the 400 line discrimination circuit 2, which detects the presence or absence of a pulse during the vertical blanking period, and outputs the output signal C if it is the 400 line. A control voltage at a predetermined level is sent out by a direct current conversion circuit 3 consisting of a sending out integration circuit 1, which causes a deflection coil impedance switching circuit 4 by switching the transformer tap, and a horizontal output line adjustment gamma circuit 5 by switching the resonance capacitance. By operating the horizontal position Urasa circuit 6 by switching the phase of the AFC pulse, the vertical amplitude switching circuit 7 by switching the specific number, and the vertical synchronization switching circuit 8 by switching the synchronization volume constant, the 200 line mode is set. Switch the number of scanning lines to 400 line mode,
The video signal supplied to the CRTIO through the video signal processing circuit 9 is displayed on the screen.

尚、本発明では、水平走査線数200ラインと400ラ
インとの切換について示したが、前記垂直帰線消去期間
内の判別パルス数を;・譜加させることにより更に多く
の偏向周波数に切換することも・可能であり、更に高解
像度化されても容易に対応することが可能なものである
In the present invention, switching between 200 horizontal scanning lines and 400 horizontal scanning lines has been described, but switching to a higher deflection frequency can be achieved by adding the number of discrimination pulses within the vertical blanking period. It is also possible to do so, and even if the resolution is increased, it can be easily accommodated.

く効果〉 以上のように本発明のCRT表示装置では、パーソナル
コンピュータの映像信号中の帰線消去期間中に挿入され
た偏向周波数切換えを示す判別パルスを検出して、これ
に従って偏向周波数を自動切換えすることにより、CR
T表示装置に切換スイッチがなくとも、パーソナルコン
ピュータの映像出力Cでより自動的に切換えされるため
、その操作性が向上し、また200ラインと400ライ
ンとの走査線数に対応できるので、大量生産による低圃
格化を容易(C行なうことができるものである。
Effects> As described above, the CRT display device of the present invention detects the discrimination pulse indicating deflection frequency switching inserted during the blanking period in the video signal of the personal computer, and automatically switches the deflection frequency in accordance with the detection pulse. By doing so, CR
Even if the T display device does not have a changeover switch, it can be switched automatically using the video output C of the personal computer, improving operability.Also, since it can handle scanning lines of 200 lines and 400 lines, it can be used in large quantities. It is possible to easily reduce the quality of agricultural land through production.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明のCRT表示装置の基本構成を示すブロ
ック図、第2図は同表示装置で検出する判別パルスの波
形図である。 第2−1
FIG. 1 is a block diagram showing the basic configuration of a CRT display device of the present invention, and FIG. 2 is a waveform diagram of discrimination pulses detected by the display device. 2-1

Claims (1)

【特許請求の範囲】[Claims] 1、垂直、水平偏向周波数を切換可能にし、画面の解像
度を可変できるようにしたCRT表示装置において、前
記偏向周波数の切換に応じて映像信号中の帰線消去期間
に判別パルスを重量する画像出力装置の映像信号出力中
の判別パルスを検出する手段と、この検出出力により前
記偏向周波数に対応するモードに切換する手段とを有し
てなるCRT表示装置。
1. In a CRT display device in which the vertical and horizontal deflection frequencies can be switched and the screen resolution can be varied, an image output in which a discrimination pulse is weighted during the blanking period of the video signal according to the switching of the deflection frequency. A CRT display device comprising means for detecting a discrimination pulse in a video signal output from the device, and means for switching to a mode corresponding to the deflection frequency based on the detected output.
JP59224853A 1984-08-31 1984-10-24 Crt display unit Granted JPS61100791A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
JP59224853A JPS61100791A (en) 1984-10-24 1984-10-24 Crt display unit
AU45169/85A AU578194B2 (en) 1984-08-31 1985-07-18 Standard/high resolution c.r.t. display
CA000487521A CA1244932A (en) 1984-08-31 1985-07-25 Crt display unit
PH32601A PH23162A (en) 1984-08-31 1985-08-02 Crt display unit
US06/766,334 US4684987A (en) 1984-08-31 1985-08-16 CRT display unit
EP85306071A EP0173554B1 (en) 1984-08-31 1985-08-27 Crt display unit
DE8585306071T DE3584704D1 (en) 1984-08-31 1985-08-27 CATHODE RAY TUBE VIEWING DEVICE.
KR1019850006321A KR890004223B1 (en) 1984-08-31 1985-08-30 Cathod display device
ES85546620A ES8700767A1 (en) 1984-08-31 1985-08-30 CRT Display unit.
BR8504215A BR8504215A (en) 1984-08-31 1985-08-30 CRT DISPLAY UNIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59224853A JPS61100791A (en) 1984-10-24 1984-10-24 Crt display unit

Publications (2)

Publication Number Publication Date
JPS61100791A true JPS61100791A (en) 1986-05-19
JPH0260194B2 JPH0260194B2 (en) 1990-12-14

Family

ID=16820186

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59224853A Granted JPS61100791A (en) 1984-08-31 1984-10-24 Crt display unit

Country Status (1)

Country Link
JP (1) JPS61100791A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6397994A (en) * 1986-10-15 1988-04-28 横河電機株式会社 Display device
JPS644491U (en) * 1987-06-25 1989-01-11
JPH04166888A (en) * 1990-10-31 1992-06-12 Kokusai Electric Co Ltd Video switch screen control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6397994A (en) * 1986-10-15 1988-04-28 横河電機株式会社 Display device
JPS644491U (en) * 1987-06-25 1989-01-11
JPH04166888A (en) * 1990-10-31 1992-06-12 Kokusai Electric Co Ltd Video switch screen control method

Also Published As

Publication number Publication date
JPH0260194B2 (en) 1990-12-14

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