GB773339A - Improvements in or relating to target structures for use in colour television tubes - Google Patents

Improvements in or relating to target structures for use in colour television tubes

Info

Publication number
GB773339A
GB773339A GB37000/54A GB3700054A GB773339A GB 773339 A GB773339 A GB 773339A GB 37000/54 A GB37000/54 A GB 37000/54A GB 3700054 A GB3700054 A GB 3700054A GB 773339 A GB773339 A GB 773339A
Authority
GB
United Kingdom
Prior art keywords
colour
spacing
grid
frame
separation
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
GB37000/54A
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.)
Chromatic Television Laboratories Inc
Original Assignee
Chromatic Television Laboratories Inc
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 Chromatic Television Laboratories Inc filed Critical Chromatic Television Laboratories Inc
Publication of GB773339A publication Critical patent/GB773339A/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
    • H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
    • H01J29/803—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching for post-acceleration or post-deflection, e.g. for colour switching
    • H01J29/806—Electron lens mosaics, e.g. fly's eye lenses, colour selection lenses
    • 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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
    • H01J31/201—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

773,339. Colour television tubes. CHROMATIC TELEVISION LABORATORIES, Inc. Dec. 22, 1954 [Dec. 22, 1953], No. 37000/54. Class 39(1). Correction of the pin cushion and barrel distortion which gives colour dilution in a colour television tube is obtained by varying the spacing of either the phosphor groups or the deflection grid wires so that the ratio of the group width to the grid aperture width is greater at the centre of the target than at the edges thereof. The mathematical relationships enabling the ratios to be calculated are given in the Specification. In Fig. 7, the spacing of the grid wires 47, 47<1> is uniform, but the separation of the groups of phosphor strips 45g, 45r, 45b increases outwardly along the central horizontal line whilst remaining constant at the top and bottom edges. In Fig. 8 (not shown) the group separation is constant, but the grid spacing is less along the centre line, the spacing being achieved by accurate notching of the supports and by deforming the damping rods so that they hold the grid wires at the desired separation in the centre portion. The corrected widths of the phosphor groups may be obtained by laying the pattern out on a large scale and reducing photographically to proper size for the production of silk screen stencils or other printing devices therefrom. A second order of correction may be introduced by making a gelatin print of the screen pattern, mounting in a frame with sides bowed outwardly and stretching the frame and gelatin, the stretched frame being rephotographed. Similar corrections are imposed on screens of crossed colour strips and their accompanying crossed colour control wires, Fig. 2 (not shown). Specifications 721,523, 722,282. 757,071 and 757,786 are referred to.
GB37000/54A 1953-12-22 1954-12-22 Improvements in or relating to target structures for use in colour television tubes Expired GB773339A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US399754A US2745035A (en) 1953-12-22 1953-12-22 Color television tube target structure

Publications (1)

Publication Number Publication Date
GB773339A true GB773339A (en) 1957-04-24

Family

ID=23580822

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37000/54A Expired GB773339A (en) 1953-12-22 1954-12-22 Improvements in or relating to target structures for use in colour television tubes

Country Status (6)

Country Link
US (1) US2745035A (en)
BE (1) BE534345A (en)
DE (1) DE1080595B (en)
FR (1) FR1117283A (en)
GB (1) GB773339A (en)
NL (1) NL193468A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2260853A (en) * 1991-10-22 1993-04-28 Gec Ferranti Defence Syst Colour display screens
US6829019B2 (en) 2001-03-09 2004-12-07 Koninklijke Philips Electronics N.V. Picture display device of the index type

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925532A (en) * 1955-12-01 1960-02-16 Rca Corp Polychromatic electroluminescent means
US2945974A (en) * 1957-01-14 1960-07-19 Kaiser Ind Corp Electronic device
US3237038A (en) * 1963-10-14 1966-02-22 Rca Corp Screen electrode for color cathode ray tube

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US866065A (en) * 1906-06-25 1907-09-17 Albert Priestman Apparatus for controlling the flow of liquids.
DE736575C (en) * 1938-07-11 1943-06-22 Fernseh Gmbh Cathode ray tubes for generating multicolored images on a fluorescent screen
US2446791A (en) * 1946-06-11 1948-08-10 Rca Corp Color television tube
US2532511A (en) * 1946-11-16 1950-12-05 Okolicsanyi Ferene Television
US2568448A (en) * 1947-09-23 1951-09-18 Gen Electric Parallax correction in color television
US2631259A (en) * 1950-07-12 1953-03-10 Rca Corp Color television

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2260853A (en) * 1991-10-22 1993-04-28 Gec Ferranti Defence Syst Colour display screens
US6829019B2 (en) 2001-03-09 2004-12-07 Koninklijke Philips Electronics N.V. Picture display device of the index type

Also Published As

Publication number Publication date
FR1117283A (en) 1956-05-22
BE534345A (en)
DE1080595B (en) 1960-04-28
US2745035A (en) 1956-05-08
NL193468A (en)

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