FR2259500A1 - Distortion correction method for colour T.V. C.R.T. - employs two extra windings on ferrite deflection cores - Google Patents

Distortion correction method for colour T.V. C.R.T. - employs two extra windings on ferrite deflection cores

Info

Publication number
FR2259500A1
FR2259500A1 FR7402859A FR7402859A FR2259500A1 FR 2259500 A1 FR2259500 A1 FR 2259500A1 FR 7402859 A FR7402859 A FR 7402859A FR 7402859 A FR7402859 A FR 7402859A FR 2259500 A1 FR2259500 A1 FR 2259500A1
Authority
FR
France
Prior art keywords
tube
correction
deflection
ferrite
cores
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.)
Granted
Application number
FR7402859A
Other languages
French (fr)
Other versions
FR2259500B1 (en
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.)
Videon SA
Original Assignee
Videon SA
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 Videon SA filed Critical Videon SA
Priority to FR7402859A priority Critical patent/FR2259500A1/en
Publication of FR2259500A1 publication Critical patent/FR2259500A1/en
Application granted granted Critical
Publication of FR2259500B1 publication Critical patent/FR2259500B1/fr
Granted 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
    • H04N9/28—Arrangements for convergence or focusing
    • H04N9/285—Arrangements for convergence or focusing using quadrupole lenses

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

Trapezoidal distortion correction intended to remedy the effects of coil position erros and to provide some simplification in tube and correction system assembly. Correction is achieved by creating a field varying at the frame frequency, modifying the tube magnetic field at the tube extremities, such that the trapezoidal distortion is removed at both upper and lower tube face extremities, this additional correction field is created by winding on the deflection ferrite cores two extra windings arranged symmetrically to the horizontal axis of the tube. Control is by a potentiometer which may be centre tapped to earth to provide correction in 'X' and 'Y' face axes.
FR7402859A 1974-01-29 1974-01-29 Distortion correction method for colour T.V. C.R.T. - employs two extra windings on ferrite deflection cores Granted FR2259500A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7402859A FR2259500A1 (en) 1974-01-29 1974-01-29 Distortion correction method for colour T.V. C.R.T. - employs two extra windings on ferrite deflection cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7402859A FR2259500A1 (en) 1974-01-29 1974-01-29 Distortion correction method for colour T.V. C.R.T. - employs two extra windings on ferrite deflection cores

Publications (2)

Publication Number Publication Date
FR2259500A1 true FR2259500A1 (en) 1975-08-22
FR2259500B1 FR2259500B1 (en) 1979-01-26

Family

ID=9134125

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7402859A Granted FR2259500A1 (en) 1974-01-29 1974-01-29 Distortion correction method for colour T.V. C.R.T. - employs two extra windings on ferrite deflection cores

Country Status (1)

Country Link
FR (1) FR2259500A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060639A1 (en) * 1999-03-30 2000-10-12 Koninklijke Philips Electronics N.V. Display device comprising a deflection unit and a deflection unit for a display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060639A1 (en) * 1999-03-30 2000-10-12 Koninklijke Philips Electronics N.V. Display device comprising a deflection unit and a deflection unit for a display device
US6441567B1 (en) 1999-03-30 2002-08-27 Koninklijke Philips Electronics N.V. Display device comprising a deflection unit and a deflection unit for a display device

Also Published As

Publication number Publication date
FR2259500B1 (en) 1979-01-26

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Legal Events

Date Code Title Description
ST Notification of lapse