GB656207A - Improvements in and relating to screens for cathode ray tubes in colour television systems - Google Patents

Improvements in and relating to screens for cathode ray tubes in colour television systems

Info

Publication number
GB656207A
GB656207A GB24275/48A GB2427548A GB656207A GB 656207 A GB656207 A GB 656207A GB 24275/48 A GB24275/48 A GB 24275/48A GB 2427548 A GB2427548 A GB 2427548A GB 656207 A GB656207 A GB 656207A
Authority
GB
United Kingdom
Prior art keywords
screen
plate
fluorescent
spacing
printing
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
GB24275/48A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB656207A publication Critical patent/GB656207A/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
    • H01J29/10—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
    • 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
    • H04N9/22—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information
    • H04N9/26—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using electron-optical colour selection means, e.g. line grid, deflection means in or near the gun or near the phosphor screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

656,207. Cathode-ray tubes. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 15, 1948, Nos. 24275 and 24276. Convention dates, Sept. 23, 1947. [Class 39 (i)] The spacing of the fluorescent colour lines or strips on a screen is varied to correct for parallax distortion by the deflecting wires, the spacing being increased from the centre line of the screen outwardly in accordance with the equation relating the distance of the strips from the axis to that of the control grid elements. The screen is manufactured by preparing a set of printing-plates as in photo-engraving. A photographic plate 22 with a coating of emulsion 23 is exposed through a lined screen 19 from a source 21, the source, lined screen and photographic plate being in the same relative positions as the electron gun, deflection wires and fluorescent screen of the discharge tube. The negative so obtained is printed on to a photosensitive copper printing plate, the emulsion becoming acid-resistant at exposed points. The printing-plate is used to print adhesive upon the plate of the fluorescent screen and the appropriate fluorescent powder is dusted on, excess being removed by brushing or a stream of air. The process is repeated for each of the fluorescent colours green, red and blue, the spacing of the red and blue being three times that of the green, e.g. 0.005 inch lines and 0.015 inch spacing. The red printing-plate may be inverted and used as the blue printer.
GB24275/48A 1947-09-23 1948-09-15 Improvements in and relating to screens for cathode ray tubes in colour television systems Expired GB656207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US775731A US2568448A (en) 1947-09-23 1947-09-23 Parallax correction in color television

Publications (1)

Publication Number Publication Date
GB656207A true GB656207A (en) 1951-08-15

Family

ID=25105320

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24275/48A Expired GB656207A (en) 1947-09-23 1948-09-15 Improvements in and relating to screens for cathode ray tubes in colour television systems

Country Status (3)

Country Link
US (1) US2568448A (en)
FR (1) FR983016A (en)
GB (1) GB656207A (en)

Cited By (1)

* 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

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705765A (en) * 1950-04-03 1955-04-05 Geer Charles Willard Single gun color television receiving tube and screen structure
NL158008B (en) * 1950-04-28 Ibm HOLOGRAPHIC MEMORY.
USRE26035E (en) * 1951-04-04 1966-06-14 Post deflection focused single qun color tube
US2614231A (en) * 1951-04-04 1952-10-14 Chromatic Television Lab Inc Cathode-ray tube for polychrome television apparatus
US2728025A (en) * 1951-05-17 1955-12-20 Rca Corp Post-deflected cathode-ray tubes
NL162981B (en) * 1951-07-28 Iws Nominee Co Ltd METHOD FOR THE FINISHING OF TEXTILE MATERIAL.
US3406068A (en) * 1951-07-30 1968-10-15 Rca Corp Photographic methods of making electron-sensitive mosaic screens
US2840470A (en) * 1951-09-27 1958-06-24 Sylvania Electric Prod Method of preparing a fluorescent screen
US2721288A (en) * 1951-10-23 1955-10-18 Chromatic Television Lab Inc Focusing grid structure for electron tubes
US2695372A (en) * 1951-10-23 1954-11-23 Chromatic Television Lab Inc Grid structure for cathode-ray tubes
US2741724A (en) * 1951-11-27 1956-04-10 Rauland Corp Image-reproducing device
US2723361A (en) * 1952-01-02 1955-11-08 Du Mont Allen B Lab Inc Cathode ray tube
US2653263A (en) * 1952-01-08 1953-09-22 Chromatic Television Lab Inc Color control grid structure for cathode-ray tubes
US2669675A (en) * 1952-01-08 1954-02-16 Chromatic Television Lab Inc Display surface for color television tubes
US2719241A (en) * 1952-04-18 1955-09-27 Westinghouse Electric Corp Three color kinescope for sequential color systems
US2738436A (en) * 1952-09-02 1956-03-13 Chromatic Television Lab Inc Electrode structure
US2683833A (en) * 1952-09-02 1954-07-13 Chromatic Television Lab Inc Electrode structure
US2728021A (en) * 1953-03-18 1955-12-20 Rca Corp Post-deflected cathode ray tube
US2731582A (en) * 1953-03-23 1956-01-17 Chromatic Television Lab Inc Grid structure for color television tube
NL185725B (en) * 1953-03-23 Rohm & Haas THERMOPLASTIC MATERIALS AND OBJECTS THEREOF.
NL188664B (en) * 1953-06-29 Leblanc Sa E L M CONDENSING BOILER.
US2848530A (en) * 1953-12-15 1958-08-19 Avco Mfg Corp Phosphor strip type color television tube scanning system
BE534345A (en) * 1953-12-22
NL193376A (en) * 1953-12-22
NL276909A (en) * 1954-01-14
US2873406A (en) * 1954-02-12 1959-02-10 Rca Corp Color television switching circuits
BE537449A (en) * 1954-04-19
US2941457A (en) * 1954-09-15 1960-06-21 Rca Corp Apparatus for use in the manufacture of mosaic screens for color-kinescopes, etc.
BE543975A (en) * 1954-12-28
US2831998A (en) * 1955-01-03 1958-04-22 Eugene W Allen Multicolor cathode ray tube and viewing screen and post deflection focusing unit therefor
US3025161A (en) * 1955-06-27 1962-03-13 Sylvania Electric Prod Method of forming patterns
US2866919A (en) * 1955-07-18 1958-12-30 Sylvania Electric Prod Cathode ray tube
NL215405A (en) * 1956-03-16
US2925524A (en) * 1956-03-16 1960-02-16 Gen Electric Methods and structures correcting for beam deflections in a television picture tube
US2855529A (en) * 1956-03-30 1958-10-07 Rca Corp Color-kinescopes, etc.
US3437482A (en) * 1965-04-16 1969-04-08 Sony Corp Accurate registration of phosphor strips in kinescopes by means of a transparent photograph of the post-deflection grid in combination with a positioning mask
JPS5040938B1 (en) * 1971-03-05 1975-12-27

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB443896A (en) * 1934-10-06 1936-03-10 Gen Electric Co Ltd Improvements in or relating to television
US2307188A (en) * 1940-11-30 1943-01-05 Rca Corp Television system
US2296908A (en) * 1940-12-10 1942-09-29 Crosby Everett Color television system
US2310863A (en) * 1941-01-25 1943-02-09 Rca Corp Luminescent screen
US2389979A (en) * 1942-04-14 1945-11-27 Farnsworth Television & Radio Color television system
US2416056A (en) * 1944-02-21 1947-02-18 Heinz E Kallmann Raster screen
US2461515A (en) * 1945-07-16 1949-02-15 Arthur B Bronwell Color television system
US2446249A (en) * 1946-05-04 1948-08-03 Rca Corp Pickup tube for color television
US2446791A (en) * 1946-06-11 1948-08-10 Rca Corp Color television tube
US2446440A (en) * 1947-01-28 1948-08-03 Rca Corp Color television tube

Cited By (1)

* 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

Also Published As

Publication number Publication date
US2568448A (en) 1951-09-18
FR983016A (en) 1951-06-18

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