JPS5610781A - Automatic brightness correcting circuit of television receiver - Google Patents

Automatic brightness correcting circuit of television receiver

Info

Publication number
JPS5610781A
JPS5610781A JP8492179A JP8492179A JPS5610781A JP S5610781 A JPS5610781 A JP S5610781A JP 8492179 A JP8492179 A JP 8492179A JP 8492179 A JP8492179 A JP 8492179A JP S5610781 A JPS5610781 A JP S5610781A
Authority
JP
Japan
Prior art keywords
picture
circuit
tube
tube current
current
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.)
Pending
Application number
JP8492179A
Other languages
Japanese (ja)
Inventor
Tadayoshi Katano
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8492179A priority Critical patent/JPS5610781A/en
Publication of JPS5610781A publication Critical patent/JPS5610781A/en
Pending 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
    • 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)

Abstract

PURPOSE:To improve the contrast on a picture and the fidelity of color luminnescence by comparing a mean video modulation level to a picture-tube current within the range in which an automatic picture-tube current limiting circuit is not in operation and by controlling the level of the picture-tube current to a width that comes up to the standard. CONSTITUTION:Video amplifying integrated circuit 2 is provided connecting with video detecting circuit 1 that limits the anode current of picture tube 7 automatically and further, resistance 21 is connected between terminal 10 of the video amplifying circuit and the connection point between capacitor 14 and flyback transformer 9 connected to the anode of picture tube 7 generate a voltage across at both ends of resistance 21 in proportion to the current of the picture tube. This voltage is applied via amplifying circuit 22 to input terminal 24 of comparing circuit 23, the other terminal of which is applied with a voltage proportional to a mean video modulation level from input part 25. Then, circuit 23 compares the modulation level to the picture-tube current to apply a signal, controlling the picture-tube current, to external bias terminal 14 through driving circuit 26 and within the range in which circuit 2 is not in operation, the level of the picture-tube current is limited to a width that comes up to the standard.
JP8492179A 1979-07-06 1979-07-06 Automatic brightness correcting circuit of television receiver Pending JPS5610781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8492179A JPS5610781A (en) 1979-07-06 1979-07-06 Automatic brightness correcting circuit of television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8492179A JPS5610781A (en) 1979-07-06 1979-07-06 Automatic brightness correcting circuit of television receiver

Publications (1)

Publication Number Publication Date
JPS5610781A true JPS5610781A (en) 1981-02-03

Family

ID=13844164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8492179A Pending JPS5610781A (en) 1979-07-06 1979-07-06 Automatic brightness correcting circuit of television receiver

Country Status (1)

Country Link
JP (1) JPS5610781A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60229584A (en) * 1984-04-27 1985-11-14 Matsushita Electric Ind Co Ltd Beam current limiting circuit
FR2640839A1 (en) * 1988-12-20 1990-06-22 Portenseigne Radiotechnique VIDEO IMAGE REPRODUCTION DEVICE WITH CONTRAST ADJUSTMENT, AND METHOD OF ADJUSTING THE CONTRAST OF SUCH A REPRODUCTION DEVICE
US5021885A (en) * 1989-07-07 1991-06-04 Samsung Electronics Co., Ltd. Automatic brightness limiter
KR19990058436A (en) * 1997-12-30 1999-07-15 김영환 Contrast Gain Compensator in Large Monitors

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60229584A (en) * 1984-04-27 1985-11-14 Matsushita Electric Ind Co Ltd Beam current limiting circuit
JPH0515351B2 (en) * 1984-04-27 1993-03-01 Matsushita Electric Ind Co Ltd
FR2640839A1 (en) * 1988-12-20 1990-06-22 Portenseigne Radiotechnique VIDEO IMAGE REPRODUCTION DEVICE WITH CONTRAST ADJUSTMENT, AND METHOD OF ADJUSTING THE CONTRAST OF SUCH A REPRODUCTION DEVICE
US5021885A (en) * 1989-07-07 1991-06-04 Samsung Electronics Co., Ltd. Automatic brightness limiter
KR19990058436A (en) * 1997-12-30 1999-07-15 김영환 Contrast Gain Compensator in Large Monitors

Similar Documents

Publication Publication Date Title
US4263622A (en) Automatic kinescope biasing system
US4090216A (en) Ambient light contrast and color control circuit
MY101115A (en) Colour television receivers
US4137552A (en) Automatic beam current limiter with independently determined threshold level and dynamic control range
JPS6031427B2 (en) Video signal processing device
US4484229A (en) Automatic kinescope bias control system with selectively disabled signal processor
KR910009882B1 (en) Video signal processing system
US4092667A (en) Automatic chrominance control and color killer circuits
KR100272736B1 (en) Arrangement for generating a beam current indicative signal
FI76231C (en) A video signal processing device
JPS5610781A (en) Automatic brightness correcting circuit of television receiver
KR920003724B1 (en) Automatic kinescope bias control system
US4229767A (en) Beam control circuit for diode-gun type camera tubes
GB1473553A (en) Twisting distortion correcting circuitry
US4523233A (en) Automatic bias control system with compensated sense point
US2832823A (en) Overload protection circuits
US4760450A (en) Limiter circuit for preventing blooming in a video display terminal
JP3360216B2 (en) Television system
KR830002172B1 (en) Auto kinescope bias device
KR910006192Y1 (en) Abl compensation circuit
CA1105131A (en) Image tube suppression circuit
KR850000566B1 (en) Picture adjustment circuit in television receiver
KR910005805Y1 (en) Frequency compensation circuit
KR820001832Y1 (en) Tv picture control device
KR910007199Y1 (en) Automatic contrast control circuit