CA2013930A1 - Beam current limiter with brightness control threshold extension - Google Patents

Beam current limiter with brightness control threshold extension

Info

Publication number
CA2013930A1
CA2013930A1 CA2013930A CA2013930A CA2013930A1 CA 2013930 A1 CA2013930 A1 CA 2013930A1 CA 2013930 A CA2013930 A CA 2013930A CA 2013930 A CA2013930 A CA 2013930A CA 2013930 A1 CA2013930 A1 CA 2013930A1
Authority
CA
Canada
Prior art keywords
beam current
control signal
current control
brightness
responsive
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
CA2013930A
Other languages
French (fr)
Other versions
CA2013930C (en
Inventor
Charles Bailey Neal
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.)
Technicolor USA Inc
Original Assignee
Thomson Consumer Electronics Inc
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 Consumer Electronics Inc filed Critical Thomson Consumer Electronics Inc
Publication of CA2013930A1 publication Critical patent/CA2013930A1/en
Application granted granted Critical
Publication of CA2013930C publication Critical patent/CA2013930C/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
    • 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
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H04N5/59—Control of contrast or brightness in dependence upon beam current of cathode ray tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Details Of Television Scanning (AREA)
  • Processing Of Color Television Signals (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

A brightness limiter (76) is responsive to a beam current control signal in a predetermined range of beam current operating values with an extended operating threshold for reducing brightness and reducing beam current. Operation of the brightness limiter (76) responsive to certain noise in the beam current control signal during retrace is inhibited, the brightness limiter being otherwise responsive to the beam current control signal at operating values below the threshold. operation of the brightness limiter (76) may be inhibited by passing the beam current control signal through an AC filter. Alternatively, operation of the brightness limiter may be inhibited during retrace by interrupting propagation of the beam current control signal, or by preventing operation of the brightness limiter, for example, responsive to flyback pulses or pulses in timed relationship to flyback pulses.
CA002013930A 1989-04-18 1990-04-05 Beam current limiter with brightness control threshold extension Expired - Fee Related CA2013930C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US339,841 1989-04-18
US07/339,841 US5134490A (en) 1989-04-18 1989-04-18 Beam current limiter with brightness control threshold extension

Publications (2)

Publication Number Publication Date
CA2013930A1 true CA2013930A1 (en) 1990-10-18
CA2013930C CA2013930C (en) 2000-03-28

Family

ID=23330851

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002013930A Expired - Fee Related CA2013930C (en) 1989-04-18 1990-04-05 Beam current limiter with brightness control threshold extension

Country Status (13)

Country Link
US (1) US5134490A (en)
EP (1) EP0393977B1 (en)
JP (1) JP3099090B2 (en)
KR (1) KR0163765B1 (en)
CN (1) CN1038463C (en)
AT (1) ATE142398T1 (en)
CA (1) CA2013930C (en)
DE (1) DE69028336T2 (en)
ES (1) ES2091222T3 (en)
FI (1) FI97005C (en)
MY (1) MY106131A (en)
SG (1) SG67886A1 (en)
TR (1) TR25821A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5258828A (en) * 1989-11-13 1993-11-02 Hitachi, Ltd. Color CRT drive apparatus having automatic white balance adjusting circuit and CRT display
US5200829A (en) * 1991-12-16 1993-04-06 Thomson Consumer Electronics, Inc. Contrast beam current limiting arrangement with secondary brightness beam current limiting provisions
US5245434A (en) * 1992-05-22 1993-09-14 Thomson Consumer Electronics, Inc. Autopix circuit with inserted vertical blanking
US5317400A (en) * 1992-05-22 1994-05-31 Thomson Consumer Electronics, Inc. Non-linear customer contrast control for a color television with autopix
GB9704536D0 (en) * 1997-03-05 1997-04-23 Thomson Consumer Electronics CTC195 kine driver with peak beam current limiting
EP1110379B1 (en) * 1998-09-01 2002-12-04 Micronas Munich GmbH Circuit for controlling luminance signal amplitude
JP2005268875A (en) * 2004-03-16 2005-09-29 Orion Denki Kk Television receiver having limiter circuit for preventing occurrence of smear phenomenon
US7277135B1 (en) * 2004-07-23 2007-10-02 National Semiconductor Corporation Video display signal brightness control circuit
KR102200813B1 (en) * 2014-11-19 2021-01-11 삼성전자 주식회사 Method and apparatus for receiving signal in a mobile communication system

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674932A (en) * 1971-02-16 1972-07-04 Rca Corp Automatic beam current limiter
GB1400427A (en) * 1971-11-08 1975-07-16 Rca Corp Video signal processing apparatus
JPS5537146B2 (en) * 1972-08-28 1980-09-26
US4126884A (en) * 1977-05-05 1978-11-21 Rca Corporation Kinescope beam current limiter employing automatic sequential control of image contrast and brightness to limit beam current
US4137552A (en) * 1977-05-05 1979-01-30 Rca Corporation Automatic beam current limiter with independently determined threshold level and dynamic control range
US4207591A (en) * 1978-02-09 1980-06-10 Rca Corporation Gated automatic beam current limiter in a video signal processing system
US4253121A (en) * 1978-10-12 1981-02-24 Rca Corporation Plural sequential operating mode automatic kinescope beam current limiter
US4253110A (en) * 1979-12-14 1981-02-24 Rca Corporation Automatic kinescope beam current limiter with sequential control modes
JPS56104585A (en) * 1980-01-23 1981-08-20 Sony Corp Automatic luminance adjusting device of picture tube
US4947253A (en) * 1989-04-18 1990-08-07 Rca Licensing Corporation Brightness modulator for closed loop compensation of black level
US4982287A (en) * 1989-11-01 1991-01-01 Rca Licensing Corporation Control of brightness level adapted to control of contrast

Also Published As

Publication number Publication date
KR0163765B1 (en) 1999-01-15
MY106131A (en) 1995-03-31
JPH02295387A (en) 1990-12-06
US5134490A (en) 1992-07-28
CN1038463C (en) 1998-05-20
DE69028336D1 (en) 1996-10-10
FI97005C (en) 1996-09-25
FI97005B (en) 1996-06-14
TR25821A (en) 1993-09-01
DE69028336T2 (en) 1997-01-23
ATE142398T1 (en) 1996-09-15
ES2091222T3 (en) 1996-11-01
KR900017368A (en) 1990-11-16
FI901838A0 (en) 1990-04-11
CA2013930C (en) 2000-03-28
JP3099090B2 (en) 2000-10-16
CN1046825A (en) 1990-11-07
EP0393977A1 (en) 1990-10-24
SG67886A1 (en) 1999-10-19
EP0393977B1 (en) 1996-09-04

Similar Documents

Publication Publication Date Title
EP0389192A3 (en) Fluctuation stabilizing apparatus
CA2116134A1 (en) Method and Apparatus for Controlling a Fume Hood
JPS56107927A (en) Fuel feeder
CA2013930A1 (en) Beam current limiter with brightness control threshold extension
AU2960389A (en) Video noise reduction circuit
CA2048759A1 (en) Method and apparatus for defeating the operation of an ic built-in noise inverter
ATE152872T1 (en) BRIGHTNESS LEVEL CONTROL ADAPTED TO IMAGE CONTROL
JPS5475922A (en) Pulse noise limiter circuit
ES469494A1 (en) Average beam current limiter
JPS5416918A (en) Background density compensating circuit
JPS56115023A (en) Automatic threshold level controlling circuit
JPS5763973A (en) Automatic noise eliminator
JPS648771A (en) Automatic focus circuit
JPS56111314A (en) Wind comparator
JPS6416078A (en) Noise reduction circuit
JPS542056A (en) Scanning type electron microscope
JPS5778279A (en) Beam index type color television receiver
JPS6423797A (en) Frequency controller for refrigerating cycle
JPS52111323A (en) Automatic limiter for beam current
MY111249A (en) Video system including apparatus for deactivating an automatic control arrangement
JPS56123005A (en) Control method
JPS6439184A (en) Enhancing circuit
JPS57193182A (en) Super signal inserting circuit
JPS56102173A (en) Brightness controlling device
CA2013928A1 (en) Anti-blister circuit

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed