GB1165766A - Improvements in Cathode Ray Tubes for Colour Television - Google Patents

Improvements in Cathode Ray Tubes for Colour Television

Info

Publication number
GB1165766A
GB1165766A GB26126/67A GB2612667A GB1165766A GB 1165766 A GB1165766 A GB 1165766A GB 26126/67 A GB26126/67 A GB 26126/67A GB 2612667 A GB2612667 A GB 2612667A GB 1165766 A GB1165766 A GB 1165766A
Authority
GB
United Kingdom
Prior art keywords
mask
centre
shadow mask
spacing
centres
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
GB26126/67A
Inventor
Robin Charles Coleclough
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.)
THORN AEI RADIO AND TUBES Ltd
Original Assignee
THORN AEI RADIO AND TUBES 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 THORN AEI RADIO AND TUBES Ltd filed Critical THORN AEI RADIO AND TUBES Ltd
Priority to GB26126/67A priority Critical patent/GB1165766A/en
Priority to US733439A priority patent/US3590303A/en
Priority to DE19681762377 priority patent/DE1762377B1/en
Publication of GB1165766A publication Critical patent/GB1165766A/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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/076—Shadow masks for colour television tubes characterised by the shape or distribution of beam-passing apertures

Abstract

1,165,766. Colour television tubes. THORNAEI RADIO VALVES & TUBES Ltd. 6 June, 1967, No. 26126/67. Heading H1D. In a colour cathode-ray tube employing a shadow mask, the spacing between the centres of the holes of the shadow mask, measured along the surface of the mask, in both the radial and circumferential directions, is greater at the edge of the mask than at the centre. The increase of spacing outwards from the centre of the mask is preferably such that the spacing is substantially uniform over any small area. The shadow mask may be spaced uniformly from the tube screen, on which substantially tangential circular phosphor dots are deposited which increase in size from the centre of the screen outwards. The size of the apertures in the shadow mask may also be varied. An optical method of producing a master negative of the shadow mask with the required hole spacing is described in which a spherical photo-sensitive surface is disposed outside but touching the centre of a smaller spherical mask having a uniform pattern of apertures therein and developing a pattern on the photosensitive surface using a source of light disposed between the centres of curvature of the mask and surface.
GB26126/67A 1967-06-06 1967-06-06 Improvements in Cathode Ray Tubes for Colour Television Expired GB1165766A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB26126/67A GB1165766A (en) 1967-06-06 1967-06-06 Improvements in Cathode Ray Tubes for Colour Television
US733439A US3590303A (en) 1967-06-06 1968-05-31 Color tube having shadow mask whose center-to-center aperture spacings increase radially outward from mask center
DE19681762377 DE1762377B1 (en) 1967-06-06 1968-06-06 COLOR PICTURE OF CATHODE BEAM TUBES WITH SEVERAL ELECTRON BEAM GENERATORS AND PROCESS FOR THEIR PRODUCTION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26126/67A GB1165766A (en) 1967-06-06 1967-06-06 Improvements in Cathode Ray Tubes for Colour Television

Publications (1)

Publication Number Publication Date
GB1165766A true GB1165766A (en) 1969-10-01

Family

ID=10238800

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26126/67A Expired GB1165766A (en) 1967-06-06 1967-06-06 Improvements in Cathode Ray Tubes for Colour Television

Country Status (3)

Country Link
US (1) US3590303A (en)
DE (1) DE1762377B1 (en)
GB (1) GB1165766A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136300A (en) 1975-03-19 1979-01-23 Rca Corporation Cathode ray tube having improved shadow mask
FR2401513A1 (en) * 1975-03-19 1979-03-23 Rca Corp PERFORATED SHADOW MASK CATHODIC TUBE
FR2565406A1 (en) * 1984-05-31 1985-12-06 Rca Corp IMPROVEMENTS TO COLOR IMAGE TUBE SHADOW MASKS

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988632A (en) * 1971-10-06 1976-10-26 Zenith Radio Corporation Black-surround color picture tube
NL7211677A (en) * 1972-08-26 1974-02-28
US3890527A (en) * 1973-04-26 1975-06-17 Westinghouse Electric Corp Triad color screen having elements larger than mask apertures near screen center and smaller near periphery
US4162421A (en) * 1975-03-19 1979-07-24 Rca Corporation Cathode ray tube having corrugated shadow mask with slits
DE2659998C2 (en) * 1975-03-19 1986-12-18 Rca Corp., New York, N.Y. Cathode ray tube with corrugated color selection shadow mask
US4139797A (en) * 1977-07-01 1979-02-13 Zenith Radio Corporation Color television screen and shadow mask assembly having increased tolerance to radial registration errors
US4370591A (en) * 1979-09-14 1983-01-25 Hitachi, Ltd. Color picture tube shadow mask
US4475797A (en) * 1982-07-30 1984-10-09 Zenith Electronics Corporation Color cathode ray tube screening exposure method and apparatus
US4691138A (en) * 1985-03-14 1987-09-01 Rca Corporation Color picture tube having shadow mask with varied aperture column spacing
US4631441A (en) * 1985-03-14 1986-12-23 Rca Corporation Color picture tube having improved line screen
US4794299A (en) * 1986-03-25 1988-12-27 Zenith Electronics Corporation Flat tension mask color CRT front assembly with improved mask for degrouping error compensation
JP2531214B2 (en) * 1987-12-17 1996-09-04 三菱電機株式会社 Shadow mask type color picture tube
US5534746A (en) * 1995-06-06 1996-07-09 Thomson Consumer Electronics, Inc. Color picture tube having shadow mask with improved aperture spacing
US6788354B2 (en) * 2002-04-01 2004-09-07 Sony Corporation Method for making color separator for emissive display

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003874A (en) * 1956-10-26 1961-10-10 Zenith Radio Corp Optical correction in manufacture of color image reproducers
US2947899A (en) * 1958-01-23 1960-08-02 Zenith Radio Corp Color image reproducers
US3109117A (en) * 1961-05-22 1963-10-29 Rauland Corp Color reproducing cathode-ray tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136300A (en) 1975-03-19 1979-01-23 Rca Corporation Cathode ray tube having improved shadow mask
FR2401513A1 (en) * 1975-03-19 1979-03-23 Rca Corp PERFORATED SHADOW MASK CATHODIC TUBE
FR2565406A1 (en) * 1984-05-31 1985-12-06 Rca Corp IMPROVEMENTS TO COLOR IMAGE TUBE SHADOW MASKS

Also Published As

Publication number Publication date
DE1762377B1 (en) 1972-01-13
US3590303A (en) 1971-06-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees