GB547124A - Improvements in cathode-ray tube television receivers - Google Patents

Improvements in cathode-ray tube television receivers

Info

Publication number
GB547124A
GB547124A GB9522/41A GB952241A GB547124A GB 547124 A GB547124 A GB 547124A GB 9522/41 A GB9522/41 A GB 9522/41A GB 952241 A GB952241 A GB 952241A GB 547124 A GB547124 A GB 547124A
Authority
GB
United Kingdom
Prior art keywords
ray
cathode
linear
tube
signal
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
GB9522/41A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB547124A publication Critical patent/GB547124A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/202—Gamma control
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

547,124. Television amplifiers. STANDARD TELEPHONES & CABLES, Ltd. July 26, 1941, No. 9522. Convention date, July 31, 1940. [Classes 40 (iii) and 40 (v)] Relates to television receiving apparatus including a cathode-ray tube in which the ray is focused on a luminescent screen and is modulated by being laterally shifted before passing through an aperture, this modulation being non- linear. According to the invention, this non- linear defect is compensated by distorting the input signal on its way to the modulating device. As shown, the electrodes 26, 27, 26<1>, 27<1> controlling the lateral shift of the ray before it passes through the aperture disc 22 are connected in pairs between one terminal of the signal input and a tapping 39 on the anode resistance r<1>, r<2> of a multi grid thermionic tube 41, to which the signal is also fed. A bias battery 40 is inserted in the lead to the tapping 39, and the various electrodes of the tube 41 are connected and biased as shown so as to produce a variable voltage across the resistance r<1>, r<2> which compensates the non-linear defect of the modulating device of the cathode-ray, thereby giving an overall linear relation between modulation of ray and signal input.
GB9522/41A 1940-07-31 1941-07-26 Improvements in cathode-ray tube television receivers Expired GB547124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US348604A US2287408A (en) 1940-07-31 1940-07-31 Modulating and compensating apparatus

Publications (1)

Publication Number Publication Date
GB547124A true GB547124A (en) 1942-08-13

Family

ID=23368738

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9522/41A Expired GB547124A (en) 1940-07-31 1941-07-26 Improvements in cathode-ray tube television receivers

Country Status (2)

Country Link
US (1) US2287408A (en)
GB (1) GB547124A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572858A (en) * 1947-06-03 1951-10-30 Sylvania Electric Prod Electron optical system
US2714176A (en) * 1952-06-28 1955-07-26 Rca Corp Beam-controlling systems for multibeam cathode ray tubes
US3038101A (en) * 1958-03-31 1962-06-05 Motorola Inc Deflection controlled tube
EP3550585B1 (en) * 2018-04-05 2021-06-23 FEI Company Studying dynamic specimens in a transmission charged particle microscope

Also Published As

Publication number Publication date
US2287408A (en) 1942-06-23

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