GB1178099A - Cathode-Ray Tube - Google Patents

Cathode-Ray Tube

Info

Publication number
GB1178099A
GB1178099A GB52982/68A GB5298268A GB1178099A GB 1178099 A GB1178099 A GB 1178099A GB 52982/68 A GB52982/68 A GB 52982/68A GB 5298268 A GB5298268 A GB 5298268A GB 1178099 A GB1178099 A GB 1178099A
Authority
GB
United Kingdom
Prior art keywords
electrodes
axis
boundary line
shaped
common boundary
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.)
Expired
Application number
GB52982/68A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1178099A publication Critical patent/GB1178099A/en
Expired 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
    • H01J29/51—Arrangements for controlling convergence of a plurality of beams by means of electric field only
    • 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

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

1,178,099. Cathode-ray tubes. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 8 Nov., 1968 [11 Nov., 1967] No. 52982/68. Heading H1D. In a C.R.T. comprising a luminescent screen, an electron gun system and two coaxial circular cylindrical electrodes 70, 71 whose common axis does not coincide with the axis of an electron beam from the gun, the common boundary line between the two electrodes 70, 71 has, as shown, a profile so shaped as to be curved towards the screen on both sides of its point of intersection with a plane containing the cylinder and beam path axes, the point being adjacent the beam path axis. The common boundary line is the locus of the midpoint of the gap between the two cylinders if their ends are axially spaced or of the normal projection of the end of the smaller cylinder on to the larger one if they overlap. This shaping of the electrodes alters the focusing electric field to compensate for the different strengths of focusing experienced in the meridional and sagittal planes by an off-axis beam, and which causes astigmatism. As shown, the electron gun system may produce three off-axis beams, for colour television, which cross the plane containing the boundary line at 74, 75 and 76 respectively, in which case the shape of the development of the common boundary line is preferably sinusoidal. As shown, both adjacent ends of the electrodes 70, 71 may be so shaped; alternatively only the end of one of the electrodes may be shaped. In an example specific electrode dimensions and operating voltages are given. One, at least, of the cylindrical electrodes may be formed as a coating on the tube envelope.
GB52982/68A 1967-11-11 1968-11-08 Cathode-Ray Tube Expired GB1178099A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL676715341A NL151555B (en) 1967-11-11 1967-11-11 ELECTRON BEAM TUBE FOR DISPLAYING COLORED IMAGES.
NL6902025.A NL164998C (en) 1967-11-11 1969-02-08 ELECTRON BEAM FOR DISPLAYING COLORED IMAGES.

Publications (1)

Publication Number Publication Date
GB1178099A true GB1178099A (en) 1970-01-14

Family

ID=26644268

Family Applications (2)

Application Number Title Priority Date Filing Date
GB52982/68A Expired GB1178099A (en) 1967-11-11 1968-11-08 Cathode-Ray Tube
GB1231985D Expired GB1231985A (en) 1967-11-11 1970-02-06

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1231985D Expired GB1231985A (en) 1967-11-11 1970-02-06

Country Status (7)

Country Link
US (2) US3678316A (en)
BE (2) BE723666A (en)
CH (1) CH504777A (en)
DE (2) DE1805827B2 (en)
FR (2) FR1591049A (en)
GB (2) GB1178099A (en)
NL (2) NL151555B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257826A (en) * 1991-07-10 1993-01-20 Samsung Electronic Devices Cathode ray tube electron gun

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE793992A (en) * 1972-01-14 1973-05-02 Rca Corp CATHODIC RAY TUBE
US3946266A (en) * 1973-06-11 1976-03-23 Sony Corporation Electrostatic and dynamic magnetic control of cathode ray for distortion compensation
US3936872A (en) * 1973-12-21 1976-02-03 Sony Corporation Video signal reproducing device with electron beam scanning velocity modulation
JPS5520329B2 (en) * 1974-05-23 1980-06-02
US3984723A (en) * 1974-10-04 1976-10-05 Rca Corporation Display system utilizing beam shape correction
US3978367A (en) * 1975-02-27 1976-08-31 Westinghouse Electric Corporation Cathode ray tube second electrode having rectangular projecting ridge
NL7607722A (en) * 1976-07-13 1978-01-17 Philips Nv ASTIGMATIC ELECTRON LENS, CATHOD RAY TUBE WITH SUCH LENS AND DEVICE WITH SUCH CATHOD RAY TUBE.
US4288718A (en) * 1979-05-24 1981-09-08 Zenith Radio Corporation Means and method for beam spot distortion compensation in TV picture tubes
JPH0754672B2 (en) * 1984-07-27 1995-06-07 株式会社日立製作所 Color picture tube electron gun
US4887009A (en) * 1986-02-12 1989-12-12 Rca Licensing Corporation Color display system
US4731563A (en) * 1986-09-29 1988-03-15 Rca Corporation Color display system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL82605C (en) * 1942-04-08
US2957106A (en) * 1954-08-12 1960-10-18 Rca Corp Plural beam gun
US3435268A (en) * 1966-08-19 1969-03-25 Gen Electric In-line plural beam cathode ray tube with an aspherical aperture mask

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257826A (en) * 1991-07-10 1993-01-20 Samsung Electronic Devices Cathode ray tube electron gun
GB2257826B (en) * 1991-07-10 1995-04-12 Samsung Electronic Devices Cathode ray tube

Also Published As

Publication number Publication date
US3678320A (en) 1972-07-18
DE1805827A1 (en) 1969-06-26
NL164998C (en) 1981-02-16
NL6902025A (en) 1970-08-11
DE2004880A1 (en) 1970-09-03
FR2034029A5 (en) 1970-12-04
NL164998B (en) 1980-09-15
NL151555B (en) 1976-11-15
NL6715341A (en) 1969-05-13
BE723666A (en) 1969-05-08
US3678316A (en) 1972-07-18
BE745656A (en) 1970-08-06
GB1231985A (en) 1971-05-12
FR1591049A (en) 1970-04-20
CH504777A (en) 1971-03-15
DE1805827B2 (en) 1976-11-18
DE2004880B2 (en) 1977-03-24

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