FR2372558A1 - Procede et appareil permettant d'ameliorer la nettete d'une image video - Google Patents

Procede et appareil permettant d'ameliorer la nettete d'une image video

Info

Publication number
FR2372558A1
FR2372558A1 FR7736194A FR7736194A FR2372558A1 FR 2372558 A1 FR2372558 A1 FR 2372558A1 FR 7736194 A FR7736194 A FR 7736194A FR 7736194 A FR7736194 A FR 7736194A FR 2372558 A1 FR2372558 A1 FR 2372558A1
Authority
FR
France
Prior art keywords
sharpness
video image
improving
transitions
cathode
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
FR7736194A
Other languages
English (en)
Other versions
FR2372558B1 (fr
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Publication of FR2372558A1 publication Critical patent/FR2372558A1/fr
Application granted granted Critical
Publication of FR2372558B1 publication Critical patent/FR2372558B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
    • H01J29/563—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses for controlling cross-section
    • 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
    • H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
    • H04N3/32—Velocity varied in dependence upon picture information

Landscapes

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

Abstract

L'invention concerne un procédé et un appareil permettant d'améliorer la netteté de l'image vidéo formée sur l'écran d'un tube cathodique. Au moins un faisceau d'électrons balaie l'écran dans la direction de balayage des lignes et dans la direction verticale, l'intensité du faisceau étant modulée en fonction d'un signal vidéo. La vitesse de balayage du faisceau est modulée dans le sens horizontal en fonction des transitions du signal vidéo qui correspondent aux transitions entre niveaux éleves et faibles de luminosité de l'image vidéo formée. A l'aide d'ouvertures de forme ovale 17 et 18 respectivement ménagées dans deux grilles 15 et 16 du tube cathodique en alignement avec le canon à électrons 14B, le faisceau reçoit une forme sensiblement ovale de grand axe disposé dans la direction de balayage des lignes, c'est-à-dire la direction horizontale. L'invention permet une meilleure exploitation de la technique de modulation de la vitesse de balayage du faisceau, en ce sens qu'elle améliore la netteté dans la direction verticale.
FR7736194A 1976-11-30 1977-11-30 Procede et appareil permettant d'ameliorer la nettete d'une image video Granted FR2372558A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1976160885U JPS5838679Y2 (ja) 1976-11-30 1976-11-30 テレビジヨン受像機

Publications (2)

Publication Number Publication Date
FR2372558A1 true FR2372558A1 (fr) 1978-06-23
FR2372558B1 FR2372558B1 (fr) 1984-10-05

Family

ID=15724460

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7736194A Granted FR2372558A1 (fr) 1976-11-30 1977-11-30 Procede et appareil permettant d'ameliorer la nettete d'une image video

Country Status (7)

Country Link
US (1) US4322742A (fr)
JP (1) JPS5838679Y2 (fr)
CA (1) CA1092703A (fr)
DE (1) DE2753407C2 (fr)
FR (1) FR2372558A1 (fr)
GB (1) GB1538699A (fr)
NL (1) NL7713172A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046610A1 (fr) * 1980-08-22 1982-03-03 Koninklijke Philips Electronics N.V. Tube de caméra de télévision

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55136442A (en) * 1979-04-10 1980-10-24 Toshiba Corp Electron gun
JPS5750749A (en) * 1980-09-11 1982-03-25 Matsushita Electronics Corp Electromagnetic deflection type cathode ray tube
JPS59111237A (ja) * 1982-12-16 1984-06-27 Matsushita Electronics Corp 陰極線管装置
DE4206479A1 (de) * 1992-03-02 1993-09-09 Thomson Brandt Gmbh Ablenkeinheit fuer die bildroehre in einem fernsehempfaenger
DE69321438T2 (de) * 1992-11-17 1999-05-12 Koninkl Philips Electronics Nv Anzeigevorrichtung mit Modulation der Abtastgeschwindigkeit

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US27751A (en) 1860-04-03 Improvement in mole-plows
US2103645A (en) * 1932-12-20 1937-12-28 Schlesinger Kurt Braun tube
US2678964A (en) * 1950-08-14 1954-05-18 Hazeltine Research Inc Modifying the transient response of image-reproducers
US2840754A (en) * 1954-09-01 1958-06-24 Rca Corp Electron beam tube
NL219031A (fr) * 1956-09-07
NL7208728A (fr) * 1971-07-28 1973-12-28
US3830958A (en) * 1972-03-23 1974-08-20 Sony Corp Image enhancement apparatus utilizing variable velocity scan
US3946266A (en) * 1973-06-11 1976-03-23 Sony Corporation Electrostatic and dynamic magnetic control of cathode ray for distortion compensation
US3936872A (en) * 1973-12-21 1976-02-03 Sony Corporation Video signal reproducing device with electron beam scanning velocity modulation
JPS5615102B2 (fr) * 1974-10-14 1981-04-08
US3980819A (en) * 1974-11-01 1976-09-14 Zenith Radio Corporation Edge enhancement for television images
US4080628A (en) * 1977-03-14 1978-03-21 Zenith Radio Corporation Expanded-signal image enhancement system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046610A1 (fr) * 1980-08-22 1982-03-03 Koninklijke Philips Electronics N.V. Tube de caméra de télévision

Also Published As

Publication number Publication date
DE2753407A1 (de) 1978-06-22
GB1538699A (en) 1979-01-24
FR2372558B1 (fr) 1984-10-05
DE2753407C2 (de) 1985-07-11
US4322742A (en) 1982-03-30
CA1092703A (fr) 1980-12-30
JPS5376728U (fr) 1978-06-27
NL7713172A (nl) 1978-06-01
JPS5838679Y2 (ja) 1983-09-01

Similar Documents

Publication Publication Date Title
EP2005112B1 (fr) Dispositif et procédé d'acquisition tridimensionnelle d'une zone d'espace
FR2372558A1 (fr) Procede et appareil permettant d'ameliorer la nettete d'une image video
FR2372557A1 (fr) Appareil de reproduction de signaux d'image avec modulation de vitesse de balayage du faisceau d'electrons
DE102016224724A1 (de) Scheinwerfereinrichtung für ein Fahrzeug
KR900019512A (ko) 영상 디스플레이 튜우브에서의 디스플레이 파라미터 결정 방법
DE102004001800A1 (de) Optisches Beleuchtungssystem und Anzeigevorrichtung vom Projektionstyp
DE19857580A1 (de) Großbild-Projektions-Vorrichtung
DE3227204A1 (de) Verfahren zur gleichzeitigen aufnahme von farbauszug-bildern und eines umrissbildes
US3982252A (en) Light exposure apparatus for manufacturing color picture tubes
GB1372530A (en) Method of and apparatus for preparing the screen of a colour television picture tube
KR920000917B1 (ko) 칼러 표시관 및 영상 표시 장치
DE2821463A1 (de) Kathodenstrahlroehre mit flachem gehaeuse
FR2427020A1 (fr) Circuit d'affichage de caracteres sur un dispositif de visualisation a balayage d'image dont la largeur de bande est limitee
DE69114313D1 (de) Elektronenstrahlröhre mit gekrümmtem Bildfenster und Farbbildwiedergabeanordnung.
JPS5885671A (ja) 中間調画像記録方法
KR940016412A (ko) 칼라 음극선관용 전자총
JPH11287619A (ja) 倣い溶接用溶接線検出方法及び装置
CN1189015C (zh) 图象显示装置的扫描速度调制电路
DE2915203A1 (de) Elektronenmikroskop
DE4317245A1 (de) Scheinwerfer für Kraftfahrzeuge
DE4005283C1 (en) Colour image projection equipment with CRT for TV - has red, green and blue layers on screen corresp. to relevant electrodes
DE1015845B (de) Vorrichtung zur Wiedergabe von Farbfernsehbildern
US3540361A (en) Optical field correction devices for an electronic photocomposition system
SU105386A1 (ru) Способ развертки изображений в фототелеграфном аппарате с электронной разверткой
US1993565A (en) Braun tube

Legal Events

Date Code Title Description
ST Notification of lapse