CA2145901A1 - Kinescope Driver Apparatus with Gamma Correction - Google Patents

Kinescope Driver Apparatus with Gamma Correction

Info

Publication number
CA2145901A1
CA2145901A1 CA2145901A CA2145901A CA2145901A1 CA 2145901 A1 CA2145901 A1 CA 2145901A1 CA 2145901 A CA2145901 A CA 2145901A CA 2145901 A CA2145901 A CA 2145901A CA 2145901 A1 CA2145901 A1 CA 2145901A1
Authority
CA
Canada
Prior art keywords
kinescope
cathode current
gamma correction
amplifier
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
CA2145901A
Other languages
French (fr)
Other versions
CA2145901C (en
Inventor
Anton Werner Keller
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.)
RCA Licensing Corp
Original Assignee
RCA Licensing 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 RCA Licensing Corp filed Critical RCA Licensing Corp
Publication of CA2145901A1 publication Critical patent/CA2145901A1/en
Application granted granted Critical
Publication of CA2145901C publication Critical patent/CA2145901C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04N9/64—Circuits for processing colour signals
    • H04N9/645—Beam current control means
    • 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
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/202—Gamma control
    • 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
    • H04N5/148—Video amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/63—Generation or supply of power specially adapted for television receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
    • H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Processing Of Color Television Signals (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

An amplifier (60) provides an amplified video signal in response to a video input signal supplied thereto. A cathode current sensor (Q3), couples an output of the amplifier to the cathode of a kinescope (20) and also provides an output current (Ik) proportional to the kinescope cathode current. A feedback path (82) applies a portion of the sensed cathode current provided by the cathode current sensor to a circuit node (65 or 63) in the amplifier for imparting gamma correction to images produced by the kinescope. In one application the cathode current is apportioned (Q3) to provide gamma correction for the kinescope and to provide automatic kinescope bias (AKB) control.
CA002145901A 1994-04-28 1995-03-30 Kinescope driver apparatus with gamma correction Expired - Fee Related CA2145901C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23402694A 1994-04-28 1994-04-28
US234,026 1994-04-28

Publications (2)

Publication Number Publication Date
CA2145901A1 true CA2145901A1 (en) 1995-10-29
CA2145901C CA2145901C (en) 2000-02-22

Family

ID=22879567

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002145901A Expired - Fee Related CA2145901C (en) 1994-04-28 1995-03-30 Kinescope driver apparatus with gamma correction

Country Status (13)

Country Link
US (1) US5835161A (en)
EP (1) EP0680226B1 (en)
JP (1) JP3749554B2 (en)
KR (1) KR100339061B1 (en)
CN (1) CN1106119C (en)
CA (1) CA2145901C (en)
DE (1) DE69514707T2 (en)
ES (1) ES2141274T3 (en)
MY (1) MY112456A (en)
PL (1) PL176104B1 (en)
PT (1) PT680226E (en)
RU (1) RU2183386C2 (en)
TR (1) TR28775A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3003561B2 (en) * 1995-09-25 2000-01-31 松下電器産業株式会社 Gradation conversion method and circuit, image display method and apparatus, and image signal conversion apparatus
KR100214634B1 (en) * 1996-12-21 1999-08-02 구자홍 B-color gamma correction circuit for projection tv
US5969762A (en) * 1997-02-26 1999-10-19 Thomson Consumer Electronics, Inc. Video signal driver including a cascode transistor
GB9704536D0 (en) * 1997-03-05 1997-04-23 Thomson Consumer Electronics CTC195 kine driver with peak beam current limiting
DE19709681A1 (en) * 1997-03-11 1998-09-17 Thomson Brandt Gmbh Circuit for monitoring the beam current in a color tube
US6424324B1 (en) * 1997-12-12 2002-07-23 Thomson Licensing S.A. Display driver apparatus
EP0967809A1 (en) * 1998-06-22 1999-12-29 Deutsche Thomson-Brandt Gmbh Gamma matching of a video processor by means of three measured currents
US6226037B1 (en) * 1998-07-28 2001-05-01 Thomson Licensing S.A. AKB interface circuit for kine driver IC
US6636265B1 (en) 2000-01-21 2003-10-21 Thomson Licensing S.A. Focus flutter prevention in TV receivers and monitors
US6545717B1 (en) * 2001-09-26 2003-04-08 Koninklijke Philips Electronics N.V. Display system having selectable automatic CRT cutoff stabilization or AKB with CRT feedback current simulation
JP3652671B2 (en) * 2002-05-24 2005-05-25 沖電気工業株式会社 Wiring pattern for measurement and measuring method thereof
WO2007034403A1 (en) * 2005-09-26 2007-03-29 Nxp B.V. Electronic device with an amplifier output stage and an over-current detection means
TWI384437B (en) * 2006-12-18 2013-02-01 Sony Corp An image signal processing device, an image signal processing method, and a computer program product
CN101860330B (en) * 2010-04-14 2012-09-05 华为技术有限公司 Amplifying unit, power amplifier and transmitter

Family Cites Families (30)

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Publication number Priority date Publication date Assignee Title
DE1274168C2 (en) * 1966-10-05 1979-11-22 Robert Bosch Gmbh, 7000 Stuttgart VIDEO PREAMPLIFIER FOR HIGH RESISTANCE SIGNAL SOURCES
GB1388544A (en) * 1971-04-27 1975-03-26 Rca Corp Video output amplifier
CA1069209A (en) * 1975-11-25 1980-01-01 Rca Corporation Video amplifier
GB1582138A (en) * 1976-07-19 1980-12-31 Rca Corp Video amplifier circuit
JPS5925510B2 (en) * 1976-10-14 1984-06-18 松下電器産業株式会社 gamma adjustment device
US4263622A (en) * 1979-01-30 1981-04-21 Rca Corporation Automatic kinescope biasing system
US4209808A (en) * 1979-03-26 1980-06-24 Rca Corporation Stabilized automatic brightness control network in a video signal processing system including an automatic kinescope beam current limiter
US4484229A (en) * 1982-10-29 1984-11-20 Rca Corporation Automatic kinescope bias control system with selectively disabled signal processor
US4482921A (en) * 1982-10-29 1984-11-13 Rca Corporation Level shifter for an automatic kinescope bias sampling system
US4536800A (en) * 1982-11-30 1985-08-20 Rca Corporation Additive pulse sampling circuit
US4494146A (en) * 1983-07-21 1985-01-15 Rca Corporation Wideband kinescope driver amplifier
US4589022A (en) * 1983-11-28 1986-05-13 General Electric Company Brightness control system for CRT video display
DE3437952A1 (en) * 1984-10-17 1986-04-17 Philips Patentverwaltung Gmbh, 2000 Hamburg CIRCUIT ARRANGEMENT FOR CONTROLLING A PICTURE TUBE
US4599651A (en) * 1984-11-28 1986-07-08 Rca Corporation Pulse amplifier in a brightness control system
NL8502637A (en) * 1985-03-06 1986-10-01 Philips Nv IMAGE DISPLAY DEVICE.
JPS61206375A (en) * 1985-03-08 1986-09-12 Matsushita Electric Ind Co Ltd Gamma correction circuit
US4642696A (en) * 1985-07-25 1987-02-10 Rca Corporation Kinescope driver with kinescope current sensing circuit
GB8524198D0 (en) * 1985-10-01 1985-11-06 Rca Corp Brightness controlled akb system
US4660083A (en) * 1985-10-29 1987-04-21 Rca Corporation Video display system with stabilized background level
DE3602529A1 (en) * 1986-01-29 1987-07-30 Blaupunkt Werke Gmbh CIRCUIT ARRANGEMENT FOR CONTROLLING THE WORKING POINT OF BROADBAND VIDEO AMPLIFIERS
DE3706835A1 (en) * 1987-03-03 1988-09-15 Nixdorf Computer Ag FAST DIGITAL TRANSISTOR AMPLIFIER, IN PARTICULAR VIDEO POWER AMPLIFIER FOR DATA VISIBILITY DEVICES
US4858015A (en) * 1988-03-28 1989-08-15 Thomson Consumer Electronics, Inc. Video display driver coupling circuit
US4860107A (en) * 1988-03-28 1989-08-22 Thomson Consumer Electronics, Inc. Video display driver apparatus
GB8925438D0 (en) * 1989-11-10 1989-12-28 Rca Licensing Corp Non-linear rgb video signal processing
RU2010450C1 (en) * 1991-01-03 1994-03-30 Мантуло Анатолий Павлович Device for controlling matrix screen
FR2674705A1 (en) * 1991-03-29 1992-10-02 Philips Electro Grand Public VIDEO AMPLIFIER DEVICE.
US5317240A (en) * 1992-06-29 1994-05-31 Rca Thomson Licensing Corporation Kinescope driver apparatus with contrast enhancement
MY110211A (en) * 1992-06-17 1998-02-28 Rca Thomson Licensing Corp Kinescope driver apparatus with contrast enhancement.
US5410222A (en) * 1993-08-31 1995-04-25 Thomson Consumer Electronics, Inc. Sample pulse generator for automatic kinescope bias system
US5345267A (en) * 1993-08-31 1994-09-06 Thomson Consumer Electronics, Inc. AKB apparatus with hot start flash prevention

Also Published As

Publication number Publication date
KR100339061B1 (en) 2002-11-16
CA2145901C (en) 2000-02-22
DE69514707D1 (en) 2000-03-02
CN1106119C (en) 2003-04-16
PL308325A1 (en) 1995-10-30
US5835161A (en) 1998-11-10
EP0680226B1 (en) 2000-01-26
PT680226E (en) 2000-06-30
MY112456A (en) 2001-06-30
RU95106508A (en) 1997-01-27
EP0680226A3 (en) 1997-01-15
JP3749554B2 (en) 2006-03-01
DE69514707T2 (en) 2000-06-21
KR950035310A (en) 1995-12-30
JPH0851558A (en) 1996-02-20
ES2141274T3 (en) 2000-03-16
CN1111880A (en) 1995-11-15
RU2183386C2 (en) 2002-06-10
TR28775A (en) 1997-03-06
EP0680226A2 (en) 1995-11-02
PL176104B1 (en) 1999-04-30

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