WO1991007048A3 - Einrichtung zum automatischen justieren eines ablenkrasters auf einer bildfläche - Google Patents

Einrichtung zum automatischen justieren eines ablenkrasters auf einer bildfläche Download PDF

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Publication number
WO1991007048A3
WO1991007048A3 PCT/EP1990/001906 EP9001906W WO9107048A3 WO 1991007048 A3 WO1991007048 A3 WO 1991007048A3 EP 9001906 W EP9001906 W EP 9001906W WO 9107048 A3 WO9107048 A3 WO 9107048A3
Authority
WO
WIPO (PCT)
Prior art keywords
deflection
automatically adjusting
picture area
picture
deflection grid
Prior art date
Application number
PCT/EP1990/001906
Other languages
English (en)
French (fr)
Other versions
WO1991007048A2 (de
Inventor
Guenter Gleim
Jacques Chauvin
Friedrich Heizmann
Original Assignee
Thomson Brandt 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.)
Filing date
Publication date
Application filed by Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of WO1991007048A2 publication Critical patent/WO1991007048A2/de
Publication of WO1991007048A3 publication Critical patent/WO1991007048A3/de

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
    • 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
    • H04N3/2335—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements with calculating means
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Details Of Television Scanning (AREA)

Abstract

Auf der Bildfläche (1) ist ein Lichtsensor (3) angeordnet, der von einem Lichtstrahl des Ablenkrasters beaufschlagt wird. Aufgabe ist es, eine einfache Sensoreinheit (3) zu schaffen, mit der eine Abweichung des Strahls (L) in alle Richtungen detektiert werden kann. Die Sensoreinheit (3) enthält vier getrennte Sensoren (A bis D) in einer Anordnung als Vierquadranten-Detektor. Die Steuersignale für die horizontale und vertikale Ablenkung zum Zwecke der Justierung des Strahls werden durch unterschiedliche Kombinationen der Ausgangssignale der Sensoren (A bis D) gewonnen. Insbesondere für die Stabilisierung von Bildlage und Ablenkamplitude bei einem Projektions-Fernsehgerät.
PCT/EP1990/001906 1989-11-04 1990-10-26 Einrichtung zum automatischen justieren eines ablenkrasters auf einer bildfläche WO1991007048A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893936790 DE3936790A1 (de) 1989-11-04 1989-11-04 Einrichtung zum automatischen justieren eines ablenkrasters auf einer bildflaeche
DEP3936790.8 1989-11-04

Publications (2)

Publication Number Publication Date
WO1991007048A2 WO1991007048A2 (de) 1991-05-16
WO1991007048A3 true WO1991007048A3 (de) 1991-06-13

Family

ID=6392889

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/001906 WO1991007048A2 (de) 1989-11-04 1990-10-26 Einrichtung zum automatischen justieren eines ablenkrasters auf einer bildfläche

Country Status (4)

Country Link
CN (1) CN1051653A (de)
AU (1) AU6548390A (de)
DE (1) DE3936790A1 (de)
WO (1) WO1991007048A2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4136121C2 (de) * 1991-11-02 2003-06-26 Thomson Brandt Gmbh Einrichtung zum automatischen Justieren eines Ablenkrasters auf einer Bildfläche
DE4137131C2 (de) * 1991-11-12 2003-06-26 Thomson Brandt Gmbh Verfahren und Vorrichtung zur Rasterkorrektur
EP0703714A3 (de) * 1994-09-20 1997-09-03 Matsushita Electric Ind Co Ltd Bildanzeigepositiondetektionsvorrichtung und Bildkorrekturvorrichtung
DE19700204A1 (de) * 1997-01-04 1998-07-09 Thomson Brandt Gmbh Verfahren zur Einstellung der Konvergenz bei einem Projektions-Fernsehgerät
US6196687B1 (en) * 1999-04-16 2001-03-06 Intel Corporation Measuring convergence alignment of a projection system
DE10113835B4 (de) * 2001-03-21 2005-02-10 Carl Zeiss Jena Gmbh Projektionsanordnung zum Projizieren eines Bildes auf eine Projektionsfläche und Verfahren zum Ermitteln von nicht darzustellenden Bildpunkten eines Lichtmodulatorbildbereichs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743883A (en) * 1971-01-15 1973-07-03 Fairchild Camera Instr Co Photodiode apparatus for reducing beam drift of a cathode ray tube display system
GB2048625A (en) * 1979-05-03 1980-12-10 Philips Nv Measuring and adjusting convergence in a shadow mask type display tube
GB2139860A (en) * 1983-05-09 1984-11-14 Gen Electric Co Plc Vibration compensated cathode ray tube display device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743883A (en) * 1971-01-15 1973-07-03 Fairchild Camera Instr Co Photodiode apparatus for reducing beam drift of a cathode ray tube display system
GB2048625A (en) * 1979-05-03 1980-12-10 Philips Nv Measuring and adjusting convergence in a shadow mask type display tube
GB2139860A (en) * 1983-05-09 1984-11-14 Gen Electric Co Plc Vibration compensated cathode ray tube display device

Also Published As

Publication number Publication date
WO1991007048A2 (de) 1991-05-16
DE3936790A1 (de) 1991-05-08
CN1051653A (zh) 1991-05-22
AU6548390A (en) 1991-05-31

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