GB448146A - Improvements in cathode ray tubes for use in television and the like - Google Patents

Improvements in cathode ray tubes for use in television and the like

Info

Publication number
GB448146A
GB448146A GB1453535A GB1453535A GB448146A GB 448146 A GB448146 A GB 448146A GB 1453535 A GB1453535 A GB 1453535A GB 1453535 A GB1453535 A GB 1453535A GB 448146 A GB448146 A GB 448146A
Authority
GB
United Kingdom
Prior art keywords
plates
screen
distortion
potential
varying
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
GB1453535A
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 GB1453535A priority Critical patent/GB448146A/en
Publication of GB448146A publication Critical patent/GB448146A/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
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/74—Deflecting by electric fields only

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

448,146. Cathode - ray tubes. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and JESTY, L. C., c/o General Electric Co., Ltd., Wembley, Middlesex. May 17, 1935, No. 14535. [Class 39 (i)] " Keystone distortion " of the image due to the inclination of the screen 4 of a cathoderay tube for television &c. is compensated by an opposed " keystone distortion " which is produced by the varying mean potential of the deflecting plates 3 nearer the screen 4 and which is adjusted in magnitude by a conductor 5 between the plates 3 and the screen 4 and at a potential varying in the same sense as that of the plates 3. The plates 3 produce the deflections at low frequency and the high frequency deflections are produced by plates 2 or magnetic coils. One plate 3 is at fixed potential and the other plate 3 receives the scanning voltages. As the mean potential of the plates 3 varies, the ray deflected at the plates 2 is variably refracted to produce a " keystone distortion opposed to the distortion due to the inclined screen 4. The magnitude of the former distortion is adjusted to compensate adequately for the latter distortion by means of the ring 5 of suitable length parallel to the axis 1 of the tube and connected to the plate 3 of varying potential or to a tapping on a potentiometer across the plates 3. Several rings 5 .. 7 may be arranged between the plates 3 and screen 4 and suitably connected to the plates 3. Specification 412,813 is referred to.
GB1453535A 1935-05-17 1935-05-17 Improvements in cathode ray tubes for use in television and the like Expired GB448146A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1453535A GB448146A (en) 1935-05-17 1935-05-17 Improvements in cathode ray tubes for use in television and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1453535A GB448146A (en) 1935-05-17 1935-05-17 Improvements in cathode ray tubes for use in television and the like

Publications (1)

Publication Number Publication Date
GB448146A true GB448146A (en) 1936-06-03

Family

ID=10042952

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1453535A Expired GB448146A (en) 1935-05-17 1935-05-17 Improvements in cathode ray tubes for use in television and the like

Country Status (1)

Country Link
GB (1) GB448146A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE855877C (en) * 1941-03-08 1952-11-17 Telefunken Gmbh Electrostatic deflection device for cathode ray tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE855877C (en) * 1941-03-08 1952-11-17 Telefunken Gmbh Electrostatic deflection device for cathode ray tubes

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