CA2039501A1 - Color picture tube having inline electron gun with focus adjustement means - Google Patents
Color picture tube having inline electron gun with focus adjustement meansInfo
- Publication number
- CA2039501A1 CA2039501A1 CA2039501A CA2039501A CA2039501A1 CA 2039501 A1 CA2039501 A1 CA 2039501A1 CA 2039501 A CA2039501 A CA 2039501A CA 2039501 A CA2039501 A CA 2039501A CA 2039501 A1 CA2039501 A1 CA 2039501A1
- Authority
- CA
- Canada
- Prior art keywords
- lens
- focus
- beams
- picture tube
- 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
- 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
-
- 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
- H01J29/58—Arrangements for focusing or reflecting ray or beam
- H01J29/62—Electrostatic lenses
- H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
- H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
-
- 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
- H01J2229/4896—Aperture shape as viewed along beam axis complex and not provided for
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
A color picture tube has a viewing screen and an electron gun for generating and directing three inline electron beams, a center beam and two side beams, toward the screen.
The gun includes electrodes that form three focus lenses. A first lens is located in a beam-forming region of the gun. A second lens includes at least one electrode for providing asymmetrically-shaped beams to a third lens. The third lens is a common main focus lens for all three beams. The improvement comprises one of the electrodes of the third lens being shaped to provide a major amount of focus correction for each individual electron beam, and the one electrode of the second lens including means for providing the remaining amounts of focus correction needed to substantially totally correct each individual electron beam.
The gun includes electrodes that form three focus lenses. A first lens is located in a beam-forming region of the gun. A second lens includes at least one electrode for providing asymmetrically-shaped beams to a third lens. The third lens is a common main focus lens for all three beams. The improvement comprises one of the electrodes of the third lens being shaped to provide a major amount of focus correction for each individual electron beam, and the one electrode of the second lens including means for providing the remaining amounts of focus correction needed to substantially totally correct each individual electron beam.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US50953790A | 1990-04-16 | 1990-04-16 | |
US509537 | 1990-04-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2039501A1 true CA2039501A1 (en) | 1991-10-17 |
CA2039501C CA2039501C (en) | 1999-02-02 |
Family
ID=24027042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002039501A Expired - Fee Related CA2039501C (en) | 1990-04-16 | 1991-04-04 | Color picture tube having inline electron gun with focus adjustement means |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0452789B1 (en) |
JP (1) | JP2616849B2 (en) |
KR (1) | KR950002262B1 (en) |
CN (1) | CN1041577C (en) |
CA (1) | CA2039501C (en) |
DE (1) | DE69114893T2 (en) |
MY (1) | MY105411A (en) |
PL (1) | PL165538B1 (en) |
RU (1) | RU2025818C1 (en) |
TR (1) | TR25229A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06251722A (en) * | 1993-02-24 | 1994-09-09 | Hitachi Ltd | Cathode-ray tube |
FR2705164B1 (en) * | 1993-05-10 | 1995-07-13 | Thomson Tubes & Displays | Color image tube with electron guns in line with astigmatic lenses. |
CN1054462C (en) * | 1994-06-30 | 2000-07-12 | 中华映管股份有限公司 | Colour kinescope electron gun with hollow chain-shaped mainlens and unidirectional extension hole circular symmetric auxiliary lens |
JP3726402B2 (en) * | 1996-07-05 | 2005-12-14 | ソニー株式会社 | In-line electron gun for color cathode ray tube |
KR19980040898A (en) * | 1996-11-30 | 1998-08-17 | 엄길용 | Cylindrical electrode of in-line electron gun |
KR20030060616A (en) * | 2002-01-10 | 2003-07-16 | 엘지.필립스디스플레이(주) | Gun for Color CRT |
CN1306544C (en) * | 2004-01-05 | 2007-03-21 | 彩虹集团电子股份有限公司 | Technological method for regulating clour teletron electron beam arrangement |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4400649A (en) * | 1981-07-10 | 1983-08-23 | Rca Corporation | Color picture tube having an improved expanded focus lens type inline electron gun |
FR2509526B1 (en) * | 1981-07-10 | 1986-08-29 | Rca Corp | IMPROVEMENTS TO ONLINE ELECTRONIC GUNS WITH EXTENDED FOCAL LENS FOR COLOR IMAGE TUBE |
JPS58198830A (en) * | 1982-05-14 | 1983-11-18 | Hitachi Ltd | Cathode-ray tube |
NL8203322A (en) * | 1982-08-25 | 1984-03-16 | Philips Nv | COLOR IMAGE TUBE. |
JPH0630227B2 (en) * | 1983-12-28 | 1994-04-20 | 株式会社東芝 | Color picture tube electron gun |
FR2590724B1 (en) * | 1985-11-22 | 1988-01-08 | Videocolor | DEVICE FOR CORRECTING THE DEVIATION EFFECT DUE TO A VARIATION OF THE FOCUSING VOLTAGE IN A TRICHROME CATHODE TUBE WITH ONLINE CATHODES |
US4764704A (en) * | 1987-01-14 | 1988-08-16 | Rca Licensing Corporation | Color cathode-ray tube having a three-lens electron gun |
JPH0748354B2 (en) * | 1987-01-14 | 1995-05-24 | アールシーエー トムソン ライセンシング コーポレイシヨン | Color cathode ray tube |
CN1013534B (en) * | 1987-04-08 | 1991-08-14 | 彩色图象公司 | Correction device of diviation effect for a three colour crt |
US4737682A (en) * | 1987-07-20 | 1988-04-12 | Rca Corporation | Color picture tube having an inline electron gun with an einzel lens |
JP2690930B2 (en) * | 1988-02-26 | 1997-12-17 | 株式会社日立製作所 | Electron gun for color cathode ray tube |
-
1991
- 1991-04-04 CA CA002039501A patent/CA2039501C/en not_active Expired - Fee Related
- 1991-04-08 MY MYPI91000575A patent/MY105411A/en unknown
- 1991-04-10 DE DE69114893T patent/DE69114893T2/en not_active Expired - Fee Related
- 1991-04-10 TR TR91/0363A patent/TR25229A/en unknown
- 1991-04-10 EP EP91105658A patent/EP0452789B1/en not_active Expired - Lifetime
- 1991-04-13 KR KR1019910005933A patent/KR950002262B1/en not_active IP Right Cessation
- 1991-04-15 CN CN91102510A patent/CN1041577C/en not_active Expired - Fee Related
- 1991-04-15 RU SU914895096A patent/RU2025818C1/en not_active IP Right Cessation
- 1991-04-15 JP JP3110959A patent/JP2616849B2/en not_active Expired - Fee Related
- 1991-04-16 PL PL91289904A patent/PL165538B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP2616849B2 (en) | 1997-06-04 |
MY105411A (en) | 1994-09-30 |
CA2039501C (en) | 1999-02-02 |
CN1056016A (en) | 1991-11-06 |
DE69114893D1 (en) | 1996-01-11 |
KR910019103A (en) | 1991-11-30 |
PL289904A1 (en) | 1992-02-10 |
EP0452789B1 (en) | 1995-11-29 |
CN1041577C (en) | 1999-01-06 |
EP0452789A2 (en) | 1991-10-23 |
KR950002262B1 (en) | 1995-03-15 |
TR25229A (en) | 1993-01-01 |
DE69114893T2 (en) | 1996-06-20 |
PL165538B1 (en) | 1995-01-31 |
EP0452789A3 (en) | 1992-02-12 |
RU2025818C1 (en) | 1994-12-30 |
JPH04230938A (en) | 1992-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |