FR2295662A1 - Scanning raster correction system for colour CRT - is passive in operation and may oscillate at twice line frequency - Google Patents

Scanning raster correction system for colour CRT - is passive in operation and may oscillate at twice line frequency

Info

Publication number
FR2295662A1
FR2295662A1 FR7539282A FR7539282A FR2295662A1 FR 2295662 A1 FR2295662 A1 FR 2295662A1 FR 7539282 A FR7539282 A FR 7539282A FR 7539282 A FR7539282 A FR 7539282A FR 2295662 A1 FR2295662 A1 FR 2295662A1
Authority
FR
France
Prior art keywords
passive
line frequency
oscillate
scanning raster
correction system
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
FR7539282A
Other languages
French (fr)
Other versions
FR2295662B3 (en
Inventor
Hans-Dietrich Rosenthal
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2295662A1 publication Critical patent/FR2295662A1/en
Application granted granted Critical
Publication of FR2295662B3 publication Critical patent/FR2295662B3/fr
Granted 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

Landscapes

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

Abstract

The system is used for correcting the scanning raster of the CRT in a colour TV set, so that distortion in the North-South direction is eliminated. The correction circuit is passive in operation, and uses an oscillator circuit connected to the vertical deflection coils; the frequency of operation may be equal to either the line frequency or twice the line frequency. The voltage produced by the circuit is proportional to the deflection of the electron beam. The output voltage of the vertical deflection amplifier (27) modulates the line impulses. The system includes a variable resistor (28) and two diodes (29, 30).
FR7539282A 1974-12-21 1975-12-22 Scanning raster correction system for colour CRT - is passive in operation and may oscillate at twice line frequency Granted FR2295662A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742460984 DE2460984B1 (en) 1974-12-21 1974-12-21 PASSIVE NORTH / SOUTH SCREEN CORRECTION FOR VERTICAL DEFLECTION OF THE TUBE, IN PARTICULAR BY COLOR TV RECEIVERS

Publications (2)

Publication Number Publication Date
FR2295662A1 true FR2295662A1 (en) 1976-07-16
FR2295662B3 FR2295662B3 (en) 1978-09-29

Family

ID=5934350

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7539282A Granted FR2295662A1 (en) 1974-12-21 1975-12-22 Scanning raster correction system for colour CRT - is passive in operation and may oscillate at twice line frequency

Country Status (5)

Country Link
AU (1) AU500338B2 (en)
DE (1) DE2460984B1 (en)
FR (1) FR2295662A1 (en)
IT (1) IT1051177B (en)
NL (1) NL7514564A (en)

Also Published As

Publication number Publication date
FR2295662B3 (en) 1978-09-29
AU500338B2 (en) 1979-05-17
NL7514564A (en) 1976-06-23
AU8733775A (en) 1977-06-16
IT1051177B (en) 1981-04-21
DE2460984B1 (en) 1976-06-24

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Legal Events

Date Code Title Description
ST Notification of lapse