GB1331550A - Cathode-ray tube of the indexing type - Google Patents

Cathode-ray tube of the indexing type

Info

Publication number
GB1331550A
GB1331550A GB5996471A GB5996471A GB1331550A GB 1331550 A GB1331550 A GB 1331550A GB 5996471 A GB5996471 A GB 5996471A GB 5996471 A GB5996471 A GB 5996471A GB 1331550 A GB1331550 A GB 1331550A
Authority
GB
United Kingdom
Prior art keywords
strips
wide
index
centres
dec
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
GB5996471A
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 GB1331550A publication Critical patent/GB1331550A/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
    • H01J29/325—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 with adjacent lines
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/16—X-ray, infrared, or ultraviolet ray processes
    • 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
    • H04N9/24—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2231/00—Cathode ray tubes or electron beam tubes
    • H01J2231/12—CRTs having luminescent screens
    • H01J2231/121—Means for indicating the position of the beam, e.g. beam indexing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

1331550 Colour television tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 23 Dec 1971 [29 Dec 1970] 59964/71 Heading H4F [Also in Divisoin H1] In a colour television display tube of the index type, the width of the index strips increases from a central area to the edges in order to equalize the signal pick up from them by an external photo-multiplier tube. The increase is preferably by a factor of at least 1À5, and in one example the centre strips are 0À1 mm. wide at their centres increasing to 0À15 mm. wide at their ends, and the edge strips are 0À15 mm. wide at their centres increasing to 2 mm. wide at their ends. The screen may comprise phosphor strips interleaved with inactive strips and covered with a reflective layer on which the index strips are located in positions overlying alternate inactive strips. The width of the phosphor strips may decrease towards the edges.
GB5996471A 1970-12-29 1971-12-23 Cathode-ray tube of the indexing type Expired GB1331550A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7018913A NL7018913A (en) 1970-12-29 1970-12-29

Publications (1)

Publication Number Publication Date
GB1331550A true GB1331550A (en) 1973-09-26

Family

ID=19811908

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5996471A Expired GB1331550A (en) 1970-12-29 1971-12-23 Cathode-ray tube of the indexing type

Country Status (7)

Country Link
US (1) US3767954A (en)
BE (1) BE777414A (en)
CA (1) CA937973A (en)
DE (1) DE2159700A1 (en)
FR (1) FR2131305A5 (en)
GB (1) GB1331550A (en)
NL (1) NL7018913A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5927069B2 (en) * 1977-03-28 1984-07-03 株式会社東芝 Index scalar picture tube
JPS5757454A (en) * 1980-09-22 1982-04-06 Yokogawa Hokushin Electric Corp Cathode ray display tube for color print
JPS5765651A (en) * 1980-10-07 1982-04-21 Sanyo Electric Co Ltd Beam index type color picture tube
CA1267684A (en) * 1985-09-12 1990-04-10 Hiroshi Kato Beam-index type color cathode ray tube device
GB8707975D0 (en) * 1987-04-03 1987-05-07 Philips Nv Colour cathode ray tube
WO2003021628A1 (en) * 2001-09-06 2003-03-13 Koninklijke Philips Electronics N.V. Tracking tube with adapted tracking structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774908A (en) * 1955-03-30 1956-12-18 Rca Corp Cathode-ray tubes of the feed-back variety
US2790107A (en) * 1955-04-04 1957-04-23 Philco Corp Indexing strip structure for cathode ray tubes
US3248218A (en) * 1961-06-09 1966-04-26 Rca Corp Variable density layers of particles and method of preparing them

Also Published As

Publication number Publication date
CA937973A (en) 1973-12-04
US3767954A (en) 1973-10-23
BE777414A (en) 1972-06-28
NL7018913A (en) 1972-07-03
DE2159700A1 (en) 1972-07-27
FR2131305A5 (en) 1972-11-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee