EP0432217A1 - In-line colour picture tube. - Google Patents
In-line colour picture tube.Info
- Publication number
- EP0432217A1 EP0432217A1 EP89910431A EP89910431A EP0432217A1 EP 0432217 A1 EP0432217 A1 EP 0432217A1 EP 89910431 A EP89910431 A EP 89910431A EP 89910431 A EP89910431 A EP 89910431A EP 0432217 A1 EP0432217 A1 EP 0432217A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grid
- opening
- picture tube
- rectangular
- color picture
- 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
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
- H01J2229/4844—Electron guns characterised by beam passing apertures or combinations
- H01J2229/4848—Aperture shape as viewed along beam axis
- H01J2229/4858—Aperture shape as viewed along beam axis parallelogram
- H01J2229/4865—Aperture shape as viewed along beam axis parallelogram rectangle
-
- 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
- H01J2229/4844—Electron guns characterised by beam passing apertures or combinations
- H01J2229/4848—Aperture shape as viewed along beam axis
- H01J2229/4858—Aperture shape as viewed along beam axis parallelogram
- H01J2229/4865—Aperture shape as viewed along beam axis parallelogram rectangle
- H01J2229/4868—Aperture shape as viewed along beam axis parallelogram rectangle with rounded end or ends
-
- 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
- H01J2229/4844—Electron guns characterised by beam passing apertures or combinations
- H01J2229/4848—Aperture shape as viewed along beam axis
- H01J2229/4872—Aperture shape as viewed along beam axis circular
-
- 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
- H01J2229/4844—Electron guns characterised by beam passing apertures or combinations
- H01J2229/4848—Aperture shape as viewed along beam axis
- H01J2229/4875—Aperture shape as viewed along beam axis oval
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
Afin d'éviter la formation d'un halo (2) dans un tube image cathodique en ligne connu ayant un système de déviation auto-focalisateur et quatre grilles (G1-G4), une ouverture rectangulaire est ménagée sur le côté de la deuxième grille (G2) tourné vers la première grille (G1), ce qui transforme le point lumineux (11) produit par le faisceau d'électrons au centre de l'écran en une ellipse verticale, tout en diminuant le rapport des axes des ellipses latérales sur les bords de l'image, améliorant ainsi la définition des bords. Les ouvertures (5) de la première grille (G1) sont allongées dans le sens d'alignement, en particulier rectangulaires, les ouvertures adjacentes (6) de la deuxième grille (G2) sont également rectangulaires et toutes les autres ouvertures des grilles (G2, G3, G4) sont circulaires. On diminue ainsi le rapport des axes du point lumineux elliptique (11) produit par le faisceau d'électrons au centre de l'écran, sans affecter négativement, la définition des bords.In order to avoid the formation of a halo (2) in a known in-line CRT picture tube having a self-focusing deflection system and four grids (G1-G4), a rectangular opening is made in the side of the second grid (G2) turned towards the first grid (G1), which transforms the light point (11) produced by the electron beam at the center of the screen into a vertical ellipse, while reducing the ratio of the axes of the lateral ellipses to edges of the image, improving edge definition. The openings (5) of the first grid (G1) are elongated in the direction of alignment, in particular rectangular, the adjacent openings (6) of the second grid (G2) are also rectangular and all the other openings of the grids (G2 , G3, G4) are circular. The ratio of the axes of the elliptical light point (11) produced by the electron beam at the center of the screen is thus reduced, without adversely affecting the definition of the edges.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89910431T ATE102394T1 (en) | 1988-09-02 | 1989-09-04 | IN-LINE COLOR CRT. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3829794A DE3829794A1 (en) | 1988-09-02 | 1988-09-02 | IN-LINE COLOR PIPES |
DE3829794 | 1988-09-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0432217A1 true EP0432217A1 (en) | 1991-06-19 |
EP0432217B1 EP0432217B1 (en) | 1994-03-02 |
Family
ID=6362121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89910431A Expired - Lifetime EP0432217B1 (en) | 1988-09-02 | 1989-09-04 | In-line colour picture tube |
Country Status (5)
Country | Link |
---|---|
US (1) | US5148081A (en) |
EP (1) | EP0432217B1 (en) |
JP (1) | JP3068145B2 (en) |
DE (2) | DE3829794A1 (en) |
WO (1) | WO1990003042A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6452320B1 (en) * | 1999-08-10 | 2002-09-17 | Sarnoff Corporation | Lens aperture structure for diminishing focal aberrations in an electron gun |
WO2004021389A1 (en) * | 2002-08-26 | 2004-03-11 | Lg. Philips Displays | Electron gun with low drive range and picture tube with such a gun |
JP4276551B2 (en) * | 2004-01-29 | 2009-06-10 | 東海工業ミシン株式会社 | Multi-head sewing machine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4234814A (en) * | 1978-09-25 | 1980-11-18 | Rca Corporation | Electron gun with astigmatic flare-reducing beam forming region |
US4251747A (en) * | 1979-11-15 | 1981-02-17 | Gte Products Corporation | One piece astigmatic grid for color picture tube electron gun |
JPS59111237A (en) * | 1982-12-16 | 1984-06-27 | Matsushita Electronics Corp | Cathode ray tube device |
NL8301601A (en) * | 1983-05-06 | 1984-12-03 | Philips Nv | CATHED BEAM TUBE. |
JPS61188840A (en) * | 1985-02-15 | 1986-08-22 | Sony Corp | Electron gun |
DE3617432A1 (en) * | 1986-05-23 | 1987-11-26 | Standard Elektrik Lorenz Ag | ELECTRON BEAM GENERATION SYSTEM |
-
1988
- 1988-09-02 DE DE3829794A patent/DE3829794A1/en not_active Withdrawn
-
1989
- 1989-09-04 EP EP89910431A patent/EP0432217B1/en not_active Expired - Lifetime
- 1989-09-04 JP JP1509749A patent/JP3068145B2/en not_active Expired - Fee Related
- 1989-09-04 US US07/655,446 patent/US5148081A/en not_active Expired - Lifetime
- 1989-09-04 DE DE89910431T patent/DE58907137D1/en not_active Expired - Fee Related
- 1989-09-04 WO PCT/EP1989/001029 patent/WO1990003042A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9003042A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0432217B1 (en) | 1994-03-02 |
US5148081A (en) | 1992-09-15 |
DE58907137D1 (en) | 1994-04-07 |
DE3829794A1 (en) | 1990-03-15 |
JP3068145B2 (en) | 2000-07-24 |
WO1990003042A1 (en) | 1990-03-22 |
JPH04500742A (en) | 1992-02-06 |
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