GB1355120A - Electron-beam fluorescent screen picture tube arrangements - Google Patents

Electron-beam fluorescent screen picture tube arrangements

Info

Publication number
GB1355120A
GB1355120A GB3587571A GB3587571A GB1355120A GB 1355120 A GB1355120 A GB 1355120A GB 3587571 A GB3587571 A GB 3587571A GB 3587571 A GB3587571 A GB 3587571A GB 1355120 A GB1355120 A GB 1355120A
Authority
GB
United Kingdom
Prior art keywords
voltage
tube
cathode
eht
reproduced
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
GB3587571A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1355120A publication Critical patent/GB1355120A/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
    • H04N9/27—Picture reproducers using cathode ray tubes with variable depth of penetration of electron beam into the luminescent layer, e.g. penetrons

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

1355120 Cathode-ray tube circuits LICENTIA PATENT-VERWALTUNGS GmbH 30 July 1971 [31 July 1970] 35875/71 Heading H4T The energy (velocity) of the beam of a cathoderay display tube is varied by switching different valves of electron accelerating high-voltage (EHT) to the cathode of the tube. The invention is described in connection with a display tube of the kind in which the colour reproduced on the screen is dependent on the energy of the scanning electron beam so that symbols traced by appropriate beam deflection may be reproduced in a required colour by control of the EHT. This requires switching times of a few microseconds which the comparatively small capacitance associated with the tube cathode circuit allows as opposed to switching an EHT supply in the tube anode circuit the capacitance of which would give rise to switching times of the order of millisecond. As shown, the anode A is supplied with a fixed positive D.C. voltage U (e.g. 14kV) and by means of linked switches S1, S2 an additional positive D.C. voltage V2 (e.g. 6kV) may be switched into the cathode-earth circuit. Alternatively the anode A may be connected to earth and the voltage source U1 connected in series with the cathode earth circuit. If three colours are to be reproduced a second switched voltage source U3 may be provided. The tube heater is supplied from a 6V winding on a transformer TR1 the primary of which is connected to a high frequency generator G providing a 30V, rectangular wave supply the 6V winding also providing the primary drive to a transformer TR2 having a secondary winding supplying - 100V at terminal 3 for the beam intensity control grid I via video amplifiers V and supplying + 600V at terminal 4 for the preliminary acceleration grid N. This voltage is also supplied to a focusing unit FU which provided the focusing electrode F with a focusing voltage the magnitude of which is adjusted in accordance with changes in the EHT supply by means of switches SC and S4 linked to switches S1 and S2 respectively.
GB3587571A 1970-07-31 1971-07-30 Electron-beam fluorescent screen picture tube arrangements Expired GB1355120A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2037982 1970-07-31

Publications (1)

Publication Number Publication Date
GB1355120A true GB1355120A (en) 1974-06-05

Family

ID=5778444

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3587571A Expired GB1355120A (en) 1970-07-31 1971-07-30 Electron-beam fluorescent screen picture tube arrangements

Country Status (5)

Country Link
US (1) US3863097A (en)
AU (1) AU451513B2 (en)
DE (1) DE2037982B1 (en)
FR (1) FR2103817A5 (en)
GB (1) GB1355120A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7904989A (en) * 1979-06-27 1980-12-30 Hollandse Signaalapparaten Bv POWER SUPPLY CIRCUIT.
US4356435A (en) * 1981-05-01 1982-10-26 United Technologies Corporation Random color switch for beam penetration CRT
US4476485A (en) * 1981-05-01 1984-10-09 United Technologies Corporation Constant current bias color switch for a beam penetration CRT
US4468691A (en) * 1981-05-01 1984-08-28 United Technologies Corporation Stroke during retrace color switch
US4337421A (en) * 1981-05-01 1982-06-29 United Technologies Corporation Sequential color switch for beam penetration CRT
US4442451A (en) * 1981-05-01 1984-04-10 United Technologies Corporation Differential random color switch for beam penetration CRT
JPS6199249A (en) * 1984-10-18 1986-05-17 Matsushita Electronics Corp Picture tube apparatus
JPH0719541B2 (en) * 1985-04-30 1995-03-06 株式会社日立製作所 In-line color picture tube
CN103606506A (en) * 2013-11-21 2014-02-26 四川天微电子有限责任公司 Miniature CRT

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL285721A (en) * 1961-11-20
US3505464A (en) * 1966-12-12 1970-04-07 Texas Instruments Inc Line sequential color television receiver
US3478245A (en) * 1968-09-20 1969-11-11 Rca Corp Penetration color displays

Also Published As

Publication number Publication date
AU3137071A (en) 1973-01-25
FR2103817A5 (en) 1972-04-14
AU451513B2 (en) 1974-08-08
US3863097A (en) 1975-01-28
DE2037982B1 (en) 1971-08-05

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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