JPS58184242A - Cathode-ray tube - Google Patents

Cathode-ray tube

Info

Publication number
JPS58184242A
JPS58184242A JP6667482A JP6667482A JPS58184242A JP S58184242 A JPS58184242 A JP S58184242A JP 6667482 A JP6667482 A JP 6667482A JP 6667482 A JP6667482 A JP 6667482A JP S58184242 A JPS58184242 A JP S58184242A
Authority
JP
Japan
Prior art keywords
vertical direction
electron beams
pairs
scanning lines
cathode
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
JP6667482A
Other languages
Japanese (ja)
Other versions
JPH021339B2 (en
Inventor
Kozo Nishimoto
西本　晃三
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6667482A priority Critical patent/JPS58184242A/en
Publication of JPS58184242A publication Critical patent/JPS58184242A/en
Publication of JPH021339B2 publication Critical patent/JPH021339B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • H01J29/503—Three or more guns, the axes of which lay in a common plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/48—Electron guns
    • H01J2229/50—Plurality of guns or beams
    • H01J2229/507—Multi-beam groups, e.g. number of beams greater than number of cathodes

Abstract

PURPOSE:To improve the density in the vertical direction of a picture by increasing the number of apparent horizontal scanning lines in the vertical direction even if the spot diameter of an electron beam becomes smaller. CONSTITUTION:The consitution provides cathodes 1R, 1G and 1B which emit electrons, and the first-fourth grids 2-5 which draw out electrons respectively from the cathode 1 and converge them through action of an electron lens, further accelerate them to make them collide with a phosphor screen as electron beams 6R, 6G and 6B, whereby each grid 2-5 is provided with pass holes 7R- 10R, 7G-10G and 7B-10B for the purpose of allowing passage of electron beams 6R, 6G and 6B respectively, said pass holes are prepared in pairs respectively in the vertical direction with the fixed interval to form the electron beams 6R, 6G and 6B in pairs in the vertical direction. When the electron beams 6R, 6G and 6B, which are thus formed in pairs in the vertical direction, are made to collide with the phosphor screen, the vertically separated horizontal scanning lines in pairs can be thereby displayed simultaneously on the phosphor screen.

Description

【発明の詳細な説明】 本発明は、テレビジョン画像を映出するために用いられ
る陰極線管に関し、螢光面上に映出される画像のラスタ
ー密度を向上することのできるものを提供するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cathode ray tube used for projecting television images, and provides a cathode ray tube that can improve the raster density of images projected on a fluorescent surface. be.

最近、陰極線管の製造技術や回路技術の進歩によって電
子ビームの集束状態が向上し、螢光面上２べ一１′ に小さいスポット径の電子ビームを照射することができ
るようになってきている。それに伴い、印加する映像信
号の周波数帯域を広くして水平方向の解像度を改善する
こともできている。しかるに、従来の陰極線管において
は１本の電子ビームだけで螢光面上を走査するようにし
ているために、そのスポット径が小さくなるに従って水
平走査線どうしの中間部分に非発光部分ができ垂直方向
に画像が粗く感じられるという欠点が生じている。Recently, advances in cathode ray tube manufacturing technology and circuit technology have improved the convergence of the electron beam, making it possible to irradiate an electron beam with a small spot diameter onto two 1' surfaces of the fluorescent surface. . Along with this, it has also been possible to improve the horizontal resolution by widening the frequency band of the applied video signal. However, in conventional cathode ray tubes, the fluorescent surface is scanned with only one electron beam, so as the spot diameter becomes smaller, a non-luminous area is created in the middle between horizontal scanning lines, and the vertical The disadvantage is that the image appears rough in some directions.

そこで、本発明はかかる点に鑑み、電子ビームのスポッ
ト径が小さくなっても垂直方向の見かけ上の水平走査線
数を増加させて画像の垂直方向の密度を向上することの
できる陰極線管を提供することを目的とするものである
。In view of this, the present invention provides a cathode ray tube that can increase the apparent number of horizontal scanning lines in the vertical direction and improve the vertical density of the image even if the spot diameter of the electron beam becomes small. The purpose is to

以下、本発明につき、インライン形カラー陰極線管に実
施した一実施例を示す図面を参照して詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing one embodiment implemented in an in-line color cathode ray tube.

第１図にその要部の概略構成を、第２図にその電子ビー
ムの集束状態を、第３図にその螢光面上での水平走査線
の表示状態を、それぞれ示す。図において、１Ｒ２１Ｇ
、１Ｂは電子３・、　　゛ を放出するカソード、２〜５はそれぞれカソード１から
の電子を引き出し、電子レンズ作用によてて集束し、さ
らに加速して、電子ビームｅＲ。FIG. 1 shows a schematic configuration of the main parts, FIG. 2 shows the focusing state of the electron beam, and FIG. 3 shows the display state of horizontal scanning lines on the fluorescent surface. In the figure, 1R21G
, 1B are cathodes that emit electrons 3.

ｅＧ、ｅＢとして螢光面上に衝突させるだめの第１〜第
４のグリッドである。この実施例では、各グリッド２〜
５にそれぞれ電子ビーム６Ｒ、ｅＧ。These are the first to fourth grids that are to be collided onto the fluorescent surface as eG and eB. In this example, each grid 2~
5 and electron beams 6R and eG, respectively.

６Ｂを通過させるだめの通過孔７Ｒ〜１０Ｒ１７Ｇ−１
０Ｇ　、　７Ｂ−１０Ｂを設けるとともに、この通過孔
はそれぞれ垂直方向に一定の間隔を隔てて２個づつ設け
て、電子ビームｅＲ、ｅＧ　、ｅＢを垂直方向に２本づ
つ形成するようにしている。Passing holes 7R to 10R17G-1 for passing 6B
0G, 7B-10B are provided, and two passing holes are provided at regular intervals in the vertical direction, so that two electron beams eR, eG, and eB are formed in the vertical direction.

このように垂直方向に２本づつ形成した電子ビーム６Ｒ
，６Ｇ、６’Ｂを螢光面に衝突させると、これによって
螢光面上には第３図に示すように垂直方向に離れた２本
づつの排平走査線を同時に表示することができる。第３
図において、ａは第３グリツド４と第４グリツド５との
・１１間で生じるプリズム効果を小さくして２本の電子
ビームｅＲ、ｅＧ。In this way, two electron beams 6R are formed in the vertical direction.
, 6G, and 6'B collide with the fluorescent surface, it is possible to simultaneously display two flat scanning lines separated in the vertical direction on the fluorescent surface as shown in Figure 3. . Third
In the figure, a shows two electron beams eR and eG by reducing the prism effect that occurs between the third grid 4 and the fourth grid 5.

６Ｂの間隔を小さくし同時に表示する走査線の間隔４を
小さくした場合の状態、ｂはそのプリズム特開昭５８−
１８４２４２　（２） 効果を大きくして２本の電子ビームｅＲ、ｅＧ　。The state when the interval 6B is made smaller and the interval 4 between the scanning lines displayed at the same time is made smaller, b is the prism JP-A-58-
184242 (2) Two electron beams eR, eG with increased effect.

６Ｂの間隔を大きくし同時に表示する走査線の間隔りを
大きくした場合の状態である。図中、イ。This is the state when the interval between 6B and the interval between scanning lines displayed at the same time is increased. In the figure, A.

口、・・・・・・は第１ライン目、第２ライン目・・・
・・・の水平走査線であり、４７２口′、・・・・・・
は飛越走査をしたときの第１ライン目、第２ライン目・
・・・・・の水平走査線である。Mouth... is the first line, second line...
472 horizontal scanning lines, 472', . . .
is the first line, second line, and
... horizontal scanning line.

第３図かられかるように、この陰極線管によれば垂直方
向での見かけ上の水平走査線数を従来２倍にすることが
でき、すなわち垂直方向での画像密度を従来の２倍にす
ることができて、見かけ上の画像のち密さを格段に向上
することができる。As can be seen from Figure 3, with this cathode ray tube, the apparent number of horizontal scanning lines in the vertical direction can be doubled compared to conventional methods, which means that the image density in the vertical direction can be doubled compared to conventional ones. This makes it possible to significantly improve the apparent density of the image.

従って、電子ビームｅＲ，５Ｇ　、ｅＢのスポット径を
小さくしても画像の粗さが目立つことがなくなり、かえ
ってスポット径を小さくして水平方向の解像度を向上し
たことと相俟って画像全体の精細度を大幅に向上してｉ
しい画像を映出することができるものである。Therefore, even if the spot diameters of the electron beams eR, 5G, and eB are made smaller, the image roughness is no longer noticeable, and together with the fact that the spot diameters are made smaller and the horizontal resolution is improved, the overall image quality is improved. Significantly improved definition
It is possible to project a new image.

なお、以上の実施例においては垂直方向に２個づつの電
子ビ“−ム通過孔を設けて電子ビームを垂直方向に２本
づつ形成するようにしたが、さらにその数を増してもよ
いことはいうまでもない。In the above embodiment, two electron beam passing holes are provided in each vertical direction to form two electron beams in each vertical direction, but the number may be further increased. Needless to say.

以上のように、本発明によれば、螢光面に表示するテレ
ビジョン画像の垂直方向の見かけ上の水平走査直線を増
加させることができて画像の垂直方向の密度を向上する
ことができ、精細度の良い美しい画像を映出することの
できる有用な陰極線管を実現することができる。As described above, according to the present invention, the apparent horizontal scanning straight line in the vertical direction of a television image displayed on a fluorescent surface can be increased, and the density of the image in the vertical direction can be improved. A useful cathode ray tube capable of projecting beautiful images with good definition can be realized.

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

第１図は本発明の一実施例における陰極線管の要部の斜
視図、第２図はその断面側面図、第３図ａ、ｂはその表
示状態を示す螢光面の正面図である。 １Ｒ９１Ｇ、１Ｂ・・・・・・カッド、２〜５・・・・
・・第１〜第４のグリッド、６Ｒ，６Ｇ、６１３・・・
・・・電子ビーム、７Ｒ−１ＯＲ、７Ｇ−１０Ｇ　、　
７Ｂ　−１０Ｂ・・・・・・電子ビーム通過孔。 代理人の氏名　弁理士、中　尾　敏　男　ほか１名第３
図 ａ １９７−FIG. 1 is a perspective view of essential parts of a cathode ray tube according to an embodiment of the present invention, FIG. 2 is a cross-sectional side view thereof, and FIGS. 3a and 3b are front views of the fluorescent surface showing the display state. 1R91G, 1B...quad, 2-5...
...1st to 4th grid, 6R, 6G, 613...
...electron beam, 7R-1OR, 7G-10G,
7B -10B...Electron beam passing hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure a 197-

Claims (1)

【特許請求の範囲】[Claims] 電子を放出するカソードと、上記カソードからの電子を
引き出しかつ集束および加速し電子ビームとして螢光面
に衝突させる複数個のグリッドとを備えるとともに、上
記グリッドのうち少なくとも１つに垂直方向に間隔を隔
てて２個以上の電子ビーム通過孔を設けて垂直方向に２
本以上の電子ビームを形成し、上記螢光面上に垂直方向
に離れた２本以上の水平走査線を同時に表示するように
したことを特徴とする陰極線管。a cathode for emitting electrons; and a plurality of grids for extracting, focusing and accelerating electrons from the cathode and impinging them on a fluorescent surface as an electron beam, the grids being spaced vertically from at least one of the grids. Two or more electron beam passing holes are provided in the vertical direction.
A cathode ray tube characterized in that it forms at least one electron beam and simultaneously displays two or more horizontal scanning lines spaced apart in the vertical direction on the phosphor surface.
JP6667482A 1982-04-20 1982-04-20 Cathode-ray tube Granted JPS58184242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6667482A JPS58184242A (en) 1982-04-20 1982-04-20 Cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6667482A JPS58184242A (en) 1982-04-20 1982-04-20 Cathode-ray tube

Publications (2)

Publication Number Publication Date
JPS58184242A true JPS58184242A (en) 1983-10-27
JPH021339B2 JPH021339B2 (en) 1990-01-11

Family

ID=13322694

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6667482A Granted JPS58184242A (en) 1982-04-20 1982-04-20 Cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS58184242A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61123456U (en) * 1985-01-21 1986-08-04
EP0635161A1 (en) * 1993-02-10 1995-01-25 Chunghwa Picture Tubes, Ltd. Multi-beam electron gun for monochrome crt
EP0635160A1 (en) * 1993-02-10 1995-01-25 Chunghwa Picture Tubes, Ltd. Multi-beam group electron gun for color crt
EP0666584A1 (en) * 1994-02-07 1995-08-09 Chunghwa Picture Tubes, Ltd. Multi-beam group electron gun for color CRT
US5483128A (en) * 1994-09-06 1996-01-09 Chunghwa Picture Tubes, Ltd. Multi-mode, hybrid-type CRT and electron gun therefor with selectable different sized grid apertures
US5689158A (en) * 1996-08-28 1997-11-18 Chunghwa Picture Tubes, Ltd. Multi-mode, hybrid-type CRT and electron gun therefor with selectable different sized grid apertures
CN1068705C (en) * 1994-06-24 2001-07-18 中华映管股份有限公司 Electron gun of colour picture tube capable of producing multiple group of electron beams

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58175248A (en) * 1982-04-06 1983-10-14 Toshiba Corp Multielectron gun type color picture tube device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58175248A (en) * 1982-04-06 1983-10-14 Toshiba Corp Multielectron gun type color picture tube device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61123456U (en) * 1985-01-21 1986-08-04
EP0635161A1 (en) * 1993-02-10 1995-01-25 Chunghwa Picture Tubes, Ltd. Multi-beam electron gun for monochrome crt
EP0635160A1 (en) * 1993-02-10 1995-01-25 Chunghwa Picture Tubes, Ltd. Multi-beam group electron gun for color crt
EP0635160A4 (en) * 1993-02-10 1995-07-05 Chen Hsing Yao Multi-beam group electron gun for color crt.
EP0635161A4 (en) * 1993-02-10 1996-09-25 Chen Hsing Yao Multi-beam electron gun for monochrome crt.
EP0666584A1 (en) * 1994-02-07 1995-08-09 Chunghwa Picture Tubes, Ltd. Multi-beam group electron gun for color CRT
US5557344A (en) * 1994-02-07 1996-09-17 Chunghwa Picture Tubes, Ltd. Multi-beam group electron gun for color CRT
CN1068705C (en) * 1994-06-24 2001-07-18 中华映管股份有限公司 Electron gun of colour picture tube capable of producing multiple group of electron beams
US5483128A (en) * 1994-09-06 1996-01-09 Chunghwa Picture Tubes, Ltd. Multi-mode, hybrid-type CRT and electron gun therefor with selectable different sized grid apertures
WO1996008032A1 (en) * 1994-09-06 1996-03-14 Chen Hsing Yao Multi-mode, hybrid-type crt and electron gun therefor
US5689158A (en) * 1996-08-28 1997-11-18 Chunghwa Picture Tubes, Ltd. Multi-mode, hybrid-type CRT and electron gun therefor with selectable different sized grid apertures

Also Published As

Publication number Publication date
JPH021339B2 (en) 1990-01-11

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