GB880517A - Improvements relating to colour television receivers - Google Patents

Improvements relating to colour television receivers

Info

Publication number
GB880517A
GB880517A GB3862756A GB3862756A GB880517A GB 880517 A GB880517 A GB 880517A GB 3862756 A GB3862756 A GB 3862756A GB 3862756 A GB3862756 A GB 3862756A GB 880517 A GB880517 A GB 880517A
Authority
GB
United Kingdom
Prior art keywords
strips
indexing
colour television
indexing signal
parent specification
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
GB3862756A
Inventor
Eric John Gargini
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical 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
Priority to NL219039D priority Critical patent/NL219039A/xx
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to DEE14420A priority patent/DE1118821B/en
Priority to US672458A priority patent/US3096395A/en
Priority to FR1179180D priority patent/FR1179180A/en
Priority to US702627A priority patent/US2966544A/en
Priority to DEE15099A priority patent/DE1167380B/en
Priority to FR754225A priority patent/FR73370E/en
Publication of GB880517A publication Critical patent/GB880517A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

880,517. Colour television. ELECTRIC & MUSICAL INDUSTRIES Ltd. Dec. 6, 1957 [Dec. 19, 1956; Feb. 27, 1957], No. 38627/56 and 6575/57. Addition to 871,367. Drawings to Specification. Class 40(3). A colour television receiver according to Claim 2 of the parent Specification is characterised in that the means for producing the indexing signal comprises means for causing the cathod-ray tube screen to emit secondary electrons in response to excitation by the beam more readily when the beam is directed at selected cycles (i.e. groups of three, red, green and blue) of the phosphor strips for substantially the entire cycle than when directed at other cycles of the phospor strips, the indexing signal being derived in response to secondary electron emission caused by the electron beam of said tube. A first embodiment of the invention, Figs. 1-3 (not shown), is in substance identical with that shown in Figs. 1-3 of the parent Specification. The indexing signal strips are deposited completely over every alternate group of three phosphors (as illustrated in Fig. 2 of the parent Specification) or over every third group of three phosphors. A second embodiment, Fig. 4 (not shown), differs only in that a pilot oscillation of 30 Mc/s is applied to modulate the tube beam and the indexing signal circuit is arranged to respond to a side band resulting from the modulation of the pilot oscillation by the indexing strips.
GB3862756A 1956-07-19 1956-12-19 Improvements relating to colour television receivers Expired GB880517A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL219039D NL219039A (en) 1956-07-19
DEE14420A DE1118821B (en) 1956-07-19 1957-07-17 Color television receiver
US672458A US3096395A (en) 1956-07-19 1957-07-17 Velocity-modulated colour television receivers
FR1179180D FR1179180A (en) 1956-07-19 1957-07-19 Improvements to color television receivers
US702627A US2966544A (en) 1956-07-19 1957-12-13 Colour television receivers, and reproducing tubes therefor
DEE15099A DE1167380B (en) 1956-07-19 1957-12-14 Color television receiver
FR754225A FR73370E (en) 1956-07-19 1957-12-19 Improvements to color television receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2238556A GB871367A (en) 1956-07-19 1956-07-19 Improvements relating to colour television receivers

Publications (1)

Publication Number Publication Date
GB880517A true GB880517A (en) 1961-10-25

Family

ID=10178530

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2238556A Expired GB871367A (en) 1956-07-19 1956-07-19 Improvements relating to colour television receivers
GB3862756A Expired GB880517A (en) 1956-07-19 1956-12-19 Improvements relating to colour television receivers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB2238556A Expired GB871367A (en) 1956-07-19 1956-07-19 Improvements relating to colour television receivers

Country Status (1)

Country Link
GB (2) GB871367A (en)

Also Published As

Publication number Publication date
GB871367A (en) 1961-06-28

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