GB858207A - Improvements in or relating to kinescope arrangements - Google Patents

Improvements in or relating to kinescope arrangements

Info

Publication number
GB858207A
GB858207A GB3259358A GB3259358A GB858207A GB 858207 A GB858207 A GB 858207A GB 3259358 A GB3259358 A GB 3259358A GB 3259358 A GB3259358 A GB 3259358A GB 858207 A GB858207 A GB 858207A
Authority
GB
United Kingdom
Prior art keywords
gun
tube
frame
line
convergence
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
GB3259358A
Inventor
Reginald Richard Harman
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB3259358A priority Critical patent/GB858207A/en
Priority to FR807265A priority patent/FR1237508A/en
Publication of GB858207A publication Critical patent/GB858207A/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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
    • H01J29/702—Convergence correction arrangements therefor
    • 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
    • H04N9/28—Arrangements for convergence or focusing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/56—Correction of beam optics
    • H01J2229/568—Correction of beam optics using supplementary correction devices
    • H01J2229/5681—Correction of beam optics using supplementary correction devices magnetic
    • H01J2229/5682—Permanently magnetised materials, e.g. permanent magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

858,207. Colour television tubes. GENERAL ELECTRIC CO. Ltd. Oct. 1, 1959 [Oct. 13, 1958], No. 32593/58. Class 39(1). [Also in Group XL(c)] Relates to a television arrangement comprising a three-gun, shadowmask, colour cathoderay tube (R.C.A. type 21 AXP 22A) in which the three guns are off-set in different directions from the tube axis. In accordance with the invention, the conventional convergence system (an electromagnetic deflection assembly associated with each gun supplied with an adjustable direct current and line-and frame-frequency saw-tooth and parabolic waves), which is provided to maintain the three beams in register over a scanned raster, is supplemented by a further convergence system associated with only one gun 3 (the " blue " gun in the example disclosed) and formed of a coil 17 mounted outside the tube, a curved hollow pole piece mounted within the tube on the gun, and a permanent magnet 22 with its axis at right-angles to the tube axis rotatably mounted for adjustment in a cylindrical holder 19. In operation of the tube, either the line or frame scan direction is arranged to correspond to the direction in which gun 3 is off-set from the tube axis. As a consequence, the conventional convergence system for gun 3 is able to effect control in only one (respectively the line or frame) direction. Correction in the other direction is then effected by the further convergence system which operates on the beam at rightangles to the conventional system, coil 17 being supplied with a saw-tooth current respectively of frame or line frequency to introduce dynamic correction and magnet 22 being adjusted for static correction. The Specification includes details of the procedure for adjusting the conventional and additional convergence systems. A circuit for supplying the line- and frame-waves to the convergence systems is described with reference to Fig. 4 (not shown).
GB3259358A 1958-10-13 1958-10-13 Improvements in or relating to kinescope arrangements Expired GB858207A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3259358A GB858207A (en) 1958-10-13 1958-10-13 Improvements in or relating to kinescope arrangements
FR807265A FR1237508A (en) 1958-10-13 1959-10-12 Cathode ray tube arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3259358A GB858207A (en) 1958-10-13 1958-10-13 Improvements in or relating to kinescope arrangements

Publications (1)

Publication Number Publication Date
GB858207A true GB858207A (en) 1961-01-11

Family

ID=10341044

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3259358A Expired GB858207A (en) 1958-10-13 1958-10-13 Improvements in or relating to kinescope arrangements

Country Status (2)

Country Link
FR (1) FR1237508A (en)
GB (1) GB858207A (en)

Also Published As

Publication number Publication date
FR1237508A (en) 1960-07-29

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