FR861968A - Improvements to television systems - Google Patents

Improvements to television systems

Info

Publication number
FR861968A
FR861968A FR861968DA FR861968A FR 861968 A FR861968 A FR 861968A FR 861968D A FR861968D A FR 861968DA FR 861968 A FR861968 A FR 861968A
Authority
FR
France
Prior art keywords
television systems
television
systems
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
Other languages
French (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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston 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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR861968A publication Critical patent/FR861968A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • 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
    • H04N3/20—Prevention of damage to cathode-ray tubes in the event of failure of scanning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/165—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level to maintain the black level constant

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)
FR861968D 1938-11-30 1939-11-30 Improvements to television systems Expired FR861968A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US243134A US2255484A (en) 1938-11-30 1938-11-30 Automatic background control for television systems
US309443A US2255485A (en) 1938-11-30 1939-12-15 Television receiver

Publications (1)

Publication Number Publication Date
FR861968A true FR861968A (en) 1941-02-22

Family

ID=26935609

Family Applications (2)

Application Number Title Priority Date Filing Date
FR861968D Expired FR861968A (en) 1938-11-30 1939-11-30 Improvements to television systems
FR868097D Expired FR868097A (en) 1938-11-30 1940-12-13 Improvements to television receivers

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR868097D Expired FR868097A (en) 1938-11-30 1940-12-13 Improvements to television receivers

Country Status (3)

Country Link
US (2) US2255484A (en)
BE (1) BE441060A (en)
FR (2) FR861968A (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418133A (en) * 1943-06-18 1947-04-01 Western Electric Co Cathode-ray apparatus and method of controlling the ray
US2425330A (en) * 1943-06-22 1947-08-12 Sperry Gyroscope Co Inc Cathode-ray system with bright and dark marker indications
GB579090A (en) * 1944-05-11 1946-07-23 Standard Telephones Cables Ltd Improvements in or relating to radio systems for guiding aircraft
US2466065A (en) * 1944-09-08 1949-04-05 Tung Sol Lamp Works Inc Direct-current amplifier and circuit
US2430331A (en) * 1944-09-14 1947-11-04 Remington Rand Inc Automatic focus control for cathode-ray tubes
US2489155A (en) * 1944-12-30 1949-11-22 Allis Chalmcrs Mfg Company Electric control circuit
US2555147A (en) * 1945-09-14 1951-05-29 Ralph E Meagher Cathode-ray tube magnetic focusing
US2514112A (en) * 1945-12-28 1950-07-04 Rca Corp Response control for wide band amplifiers
US2559078A (en) * 1946-08-10 1951-07-03 Rca Corp Television system
US2458891A (en) * 1947-01-11 1949-01-11 Philips Lab Inc Cathode-ray tube focusing circuit
US2625265A (en) * 1947-04-01 1953-01-13 Electric Sorting Machine Compa Photoelectric sorting apparatus
US2550960A (en) * 1947-05-21 1951-05-01 Hazeltine Research Inc Television receiver contrast and brightness control
US2698400A (en) * 1947-06-03 1954-12-28 Sylvania Electric Prod Generator for dynamic focusing of cathode ray tubes
US2447804A (en) * 1947-08-14 1948-08-24 Paul F G Holst Electron beam focusing circuit
US2564554A (en) * 1947-10-09 1951-08-14 Rca Corp Background control and synchronizing signal separating circuit
US2577112A (en) * 1948-04-09 1951-12-04 Rca Corp High-voltage power supply regulation
US2800528A (en) * 1949-06-23 1957-07-23 Du Mont Allen B Lab Inc Video amplifier bridge circuit for minimizing supply voltage variations
US2567377A (en) * 1949-12-06 1951-09-11 Stromberg Carlson Co Automatic focus control means for cathode-ray tubes
US2617964A (en) * 1949-12-30 1952-11-11 Philco Corp Current-limiting circuit for cathode-ray tubes
US2611881A (en) * 1950-05-24 1952-09-23 Du Mont Allen B Lab Inc Television receiver
US2656486A (en) * 1950-09-28 1953-10-20 Du Mont Allen B Lab Inc Stabilized television circuit
US2677786A (en) * 1950-10-21 1954-05-04 Motorola Inc Television circuit
US2688712A (en) * 1950-10-28 1954-09-07 Samuel A Procter Television receiver
US2658164A (en) * 1950-11-03 1953-11-03 Du Mont Allen B Lab Inc Focus circuit for cathode-ray tubes
US2623195A (en) * 1951-01-04 1952-12-23 Nolan R Best Cathode-ray dynamic focusing circuit
US2628326A (en) * 1951-03-10 1953-02-10 Zenith Radio Corp Television apparatus
NL183119B (en) * 1952-11-26 Norda Inc PROCESS FOR THE PREPARATION OF FREE-FLOWING PARTICULATE MIXTURES CONTAINING AROMA MATERIAL.
US2888604A (en) * 1955-09-22 1959-05-26 Westinghouse Electric Corp Circuit for increasing the usable light output of cathode ray tubes
US3163714A (en) * 1961-03-30 1964-12-29 Gen Electric Automatic brightness control

Also Published As

Publication number Publication date
BE441060A (en) 1941-05-31
US2255484A (en) 1941-09-09
FR868097A (en) 1941-12-15
US2255485A (en) 1941-09-09

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