ES380123A1 - Television display apparatus - Google Patents

Television display apparatus

Info

Publication number
ES380123A1
ES380123A1 ES380123A ES380123A ES380123A1 ES 380123 A1 ES380123 A1 ES 380123A1 ES 380123 A ES380123 A ES 380123A ES 380123 A ES380123 A ES 380123A ES 380123 A1 ES380123 A1 ES 380123A1
Authority
ES
Spain
Prior art keywords
current
line
field
frequency
deflection
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
ES380123A
Other languages
Spanish (es)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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
Priority claimed from NL6908228A external-priority patent/NL6908228A/xx
Priority claimed from NL6918740A external-priority patent/NL6918740A/xx
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES380123A1 publication Critical patent/ES380123A1/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
    • 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
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
    • H04N3/233—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

A circuit arrangement for generating, in an image display device, a line frequency sawtooth correction current having an amplitude variable with the field frequency, the image display device of a generator being provided field and line deflection current to apply a line and field frequency sawtooth current to line and field deflection coils at a substantially constant peak-to-peak amplitude, and a modulator controlled by the generator field deflection to obtain the variation in amplitude of the field frequency of the sawtooth correction current at the line frequency, said sawtooth correction current at the line frequency being proportional to the instantaneous values of the line deflection current and the field deflection current, characterized by the fact that the disposic Circuit ion includes means for adding an additional correction current to the sawtooth current in the vicinity of the beginning and end of each scan period, the additional current of which flows in the same direction of said correction current and which is proportional to the cube of the line deflection current and also to the cube of the field deflection current. (Machine-translation by Google Translate, not legally binding)
ES380123A 1969-05-29 1970-05-27 Television display apparatus Expired ES380123A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL6908228A NL6908228A (en) 1969-05-29 1969-05-29
NL6918740A NL6918740A (en) 1969-12-13 1969-12-13

Publications (1)

Publication Number Publication Date
ES380123A1 true ES380123A1 (en) 1973-04-16

Family

ID=26644432

Family Applications (1)

Application Number Title Priority Date Filing Date
ES380123A Expired ES380123A1 (en) 1969-05-29 1970-05-27 Television display apparatus

Country Status (8)

Country Link
AT (1) AT300057B (en)
BE (1) BE751050A (en)
CH (1) CH514263A (en)
DE (1) DE2025094B2 (en)
ES (1) ES380123A1 (en)
FR (1) FR2043787B1 (en)
GB (1) GB1294368A (en)
SE (1) SE369023B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075145B (en) * 1958-06-20 1960-02-11 Fernseh G.m.b.H., Darmstadt Circuit arrangement for correcting the convergence of the electron beams in color television picture tubes
GB1104791A (en) * 1963-08-27 1968-02-28 Mullard Ltd Improvements in or relating to time-bases
FR1526689A (en) * 1966-06-11 1968-05-24 Philips Nv Device for reproducing color television images

Also Published As

Publication number Publication date
BE751050A (en) 1970-11-27
SE369023B (en) 1974-07-29
DE2025094B2 (en) 1971-11-04
GB1294368A (en) 1972-10-25
DE2025094A1 (en) 1970-12-23
CH514263A (en) 1971-10-15
FR2043787B1 (en) 1974-03-01
FR2043787A1 (en) 1971-02-19
AT300057B (en) 1972-07-10

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