GB922123A - Improvements in or relating to cathode-ray tube circuit arrangements - Google Patents

Improvements in or relating to cathode-ray tube circuit arrangements

Info

Publication number
GB922123A
GB922123A GB4042059A GB4042059A GB922123A GB 922123 A GB922123 A GB 922123A GB 4042059 A GB4042059 A GB 4042059A GB 4042059 A GB4042059 A GB 4042059A GB 922123 A GB922123 A GB 922123A
Authority
GB
United Kingdom
Prior art keywords
control
tube
grid
cathode
peaks
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
GB4042059A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB922123A publication Critical patent/GB922123A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/20—Prevention of damage to cathode-ray tubes in the event of failure of scanning
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)

Abstract

922,123. - Television. PHILIPS ELECTRICAL INDUSTRIES Ltd. Nov. 27, 1959 [Dec. 2, 1958], No. 40420/59. Class 40 (3). [Also in Group XL (c)] Adjustment of the brightness control 14 of a television receiver varies the grid potential of the picture tube 3 and also varies by a like amount the bias potential applied via cathodefollower 7 to an unilaterally conducting device 6 which clips the peaks of the video signal supplied to the cathode of tube 3 via the video amplifier 5. With this arrangement, variation of the background brightness caused by rectification of signal peaks at the control grid when grid current flows and damage to the tube by excessive beam current during such signal peaks are prevented by the clipping action of device 6 for all settings of the brightness control. When the latter is adjusted for low background brightness the maximum permissible signal is effective to modulate the beam. The arrangement according to the invention may be advantageously employed to control, respectively, the electron beams for the red and blue components of a three-colour picture reproducing system.
GB4042059A 1958-12-02 1959-11-27 Improvements in or relating to cathode-ray tube circuit arrangements Expired GB922123A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL233846 1958-12-02

Publications (1)

Publication Number Publication Date
GB922123A true GB922123A (en) 1963-03-27

Family

ID=19751456

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4042059A Expired GB922123A (en) 1958-12-02 1959-11-27 Improvements in or relating to cathode-ray tube circuit arrangements

Country Status (5)

Country Link
CH (1) CH379563A (en)
DE (1) DE1111303B (en)
FR (1) FR1242043A (en)
GB (1) GB922123A (en)
NL (2) NL233846A (en)

Also Published As

Publication number Publication date
CH379563A (en) 1964-07-15
NL233846A (en)
NL105513C (en)
DE1111303B (en) 1961-07-20
FR1242043A (en) 1960-09-23

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