GB1355120A – Electron-beam fluorescent screen picture tube arrangements
– Google Patents
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
1970-07-31
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.)
1970-07-31
Filing date
1971-07-30
Publication date
1974-06-05
1971-07-30
Application filed by Licentia Patent Verwaltungs GmbH
filed
Critical
Licentia Patent Verwaltungs GmbH
1974-06-05
Publication of GB1355120A
publication
Critical
patent/GB1355120A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
US4468691A
(en)
*
1981-05-01
1984-08-28
United Technologies Corporation
Stroke during retrace color switch
US4442451A
(en)
*
1981-05-01
1984-04-10
United Technologies Corporation
Differential random color switch for beam penetration CRT
US4337420A
(en)
*
1981-05-01
1982-06-29
United Technologies Corporation
Dual mode 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
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
1970
1970-07-31
DE
DE2037982A
patent/DE2037982B1/en
active
Pending
1971
1971-07-19
AU
AU31370/71A
patent/AU451513B2/en
not_active
Expired
1971-07-29
FR
FR7127932A
patent/FR2103817A5/fr
not_active
Expired
1971-07-30
GB
GB3587571A
patent/GB1355120A/en
not_active
Expired
1973
1973-08-17
US
US389201A
patent/US3863097A/en
not_active
Expired – Lifetime
Also Published As
Publication number
Publication date
US3863097A
(en)
1975-01-28
AU3137071A
(en)
1973-01-25
AU451513B2
(en)
1974-08-08
FR2103817A5
(en)
1972-04-14
DE2037982B1
(en)
1971-08-05
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(en)
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Legal Events
Date
Code
Title
Description
1974-10-09
PS
Patent sealed [section 19, patents act 1949]
1983-03-02
PCNP
Patent ceased through non-payment of renewal fee
