KR920015937A - White balance automatic adjustment circuit and method - Google Patents

White balance automatic adjustment circuit and method Download PDF

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Publication number
KR920015937A
KR920015937A KR1019910000390A KR910000390A KR920015937A KR 920015937 A KR920015937 A KR 920015937A KR 1019910000390 A KR1019910000390 A KR 1019910000390A KR 910000390 A KR910000390 A KR 910000390A KR 920015937 A KR920015937 A KR 920015937A
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KR
South Korea
Prior art keywords
signal
control
outputting
video
gain
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Application number
KR1019910000390A
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Korean (ko)
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KR940004434B1 (en
Inventor
김병진
Original Assignee
강진구
삼성전자 주식회사
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Application filed by 강진구, 삼성전자 주식회사 filed Critical 강진구
Priority to KR1019910000390A priority Critical patent/KR940004434B1/en
Publication of KR920015937A publication Critical patent/KR920015937A/en
Application granted granted Critical
Publication of KR940004434B1 publication Critical patent/KR940004434B1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/64Circuits for processing colour signals
    • H04N9/73Colour balance circuits, e.g. white balance circuits or colour temperature control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/16Picture reproducers using cathode ray tubes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/64Circuits for processing colour signals
    • H04N9/72Circuits for processing colour signals for reinsertion of DC and slowly varying components of colour signals

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

내용 없음No content

Description

화이트 밸런스 자동 조절회로 및 방법White balance automatic adjustment circuit and method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 시스템 블력도, 제2도는 본 발명에 따른 흐름도.1 is a system block diagram according to the present invention, Figure 2 is a flow chart according to the present invention.

Claims (2)

OSD기능을 갖는 영상기기의 화이트 밸런스 자동조절회로에 있어서, DC콘트롤 신호와 이득콘트롤 신호를 출력하는 마이컴(10)과 복합영상신호를 처리하여 R,G,B영상신호를 출력하는 영상 신호처리부(20)와, 상기 마이컴(10)의 제어신호에 의해 OSD의 R,G,B영상신호를 발생하고 블랭킹 스위치 제어 신호를 출력하는 OSD발생부(30)와, 상기 영상신호처리부(20)의 출력신호와 상기 OSD발생부(20)의 출력신호를 입력하여 상기 OSD발생부(30)의 스위칭 제어신호에 의해 R,G,B영상신호를 선택출력하는 스위칭회로(40)와, 상기 스위칭회로(40)에서 스위칭 선택된 R,G,B영상신호를 입력하여 DC값을 콘트롤하여 DC콘트롤부(50)와, 상기 DC콘트롤부(50)에서 출력된 R,G,B영상신호를 입력하여 이득을 조절하여 출력하는 이득 콘트롤부(60)와, 상기 이득콘트롤부(60)의 이득 조절된 R,G,B영상신호를 입력하여 CRT(80)에 디스플레이하고 드라이브 전류를 검출하여 피드백시키는 드라이브회로(70)와, 상기 드라이브 회로(70)에서 검출한 전류를 디지탈 변환하여 상기 마이컴(10)으로 출력하는 A/D변환기(90)과, 상기 마이컴(10)에서 발생된 DC콘트롤 값과 이득콘트롤 값을 아날로그 신호로 변환하여 상기 DC콘트롤부(50)와 이득조절부(60)로 출력하는 D/A변환기(100)로 구성함을 특징으로 하는 화이트 밸런스 자동조절회로.In the white balance automatic adjustment circuit of an image device having an OSD function, a microcomputer 10 for outputting a DC control signal and a gain control signal and an image signal processing unit for processing a composite video signal and outputting R, G, B video signals ( 20) and the OSD generator 30 for generating the R, G, B video signal of the OSD according to the control signal of the microcomputer 10, and outputs a blanking switch control signal, and the output of the video signal processor 20 A switching circuit 40 for inputting a signal and an output signal of the OSD generator 20 to selectively output the R, G, and B video signals according to the switching control signal of the OSD generator 30, and the switching circuit ( 40, input the selected R, G, B video signal to control the DC value to input the DC control unit 50 and the R, G, B video signal output from the DC control unit 50 to gain Gain control unit 60 for adjusting and outputting, and gain-controlled R, G, B video scene of the gain control unit 60 Input and display on the CRT (80), the drive circuit 70 for detecting and feeding back the drive current, and the A / D converter for digitally converting the current detected by the drive circuit 70 to output to the microcomputer (10) 90 and the D / A converter 100 converting the DC control value and the gain control value generated by the microcomputer 10 into analog signals and outputting the analog signal to the DC control unit 50 and the gain control unit 60. White balance automatic adjustment circuit, characterized in that consisting of. OSD기능을 갖는 영상기기의 화이트 밸런스 자동조절방법에 있어서, 전원온시 기준 DC콘트롤를 신호와 이득 콘트롤 신호를 출력하여 영상신호를 디스플레이하는 제1과정과, 상기 제1과정에서 영상신호를 디스플레이한후 수직 귀선기간중인가를 검사하여 수직귀선기간중이면 OSD의 R,G,B영상신호를 순차적으로 기준값과 비교하여 전류차에 해당하는 가변콘트롤 DC값과 이득 콘트롤값을 출력하는 제3과정으로 이루어짐을 특징으로 화이트 밸런스 자동 조절 방법.A method for automatically adjusting white balance of an image device having an OSD function, comprising: a first step of displaying a video signal by outputting a signal and a gain control signal to a reference DC control at power-on; and after displaying the video signal in the first step In the vertical retrace period, a third process of outputting a variable control DC value and a gain control value corresponding to a current difference is performed by sequentially comparing the R, G, and B video signals of the OSD with a reference value. How to adjust the white balance automatically. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019910000390A 1991-01-12 1991-01-12 Method of adjusting white balance KR940004434B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910000390A KR940004434B1 (en) 1991-01-12 1991-01-12 Method of adjusting white balance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910000390A KR940004434B1 (en) 1991-01-12 1991-01-12 Method of adjusting white balance

Publications (2)

Publication Number Publication Date
KR920015937A true KR920015937A (en) 1992-08-27
KR940004434B1 KR940004434B1 (en) 1994-05-25

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ID=19309691

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910000390A KR940004434B1 (en) 1991-01-12 1991-01-12 Method of adjusting white balance

Country Status (1)

Country Link
KR (1) KR940004434B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100381105B1 (en) * 1998-11-18 2003-04-21 가부시끼가이샤 도시바 Automatic white balance adjusting circuit in color image display
KR100438280B1 (en) * 2001-12-28 2004-07-02 엘지전자 주식회사 Apparatus and Method for controlling a White Balance of OSD Screen
KR100438298B1 (en) * 2001-12-28 2004-07-02 엘지전자 주식회사 Apparatus and Method for auto-setting a max Gain

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100381105B1 (en) * 1998-11-18 2003-04-21 가부시끼가이샤 도시바 Automatic white balance adjusting circuit in color image display
KR100438280B1 (en) * 2001-12-28 2004-07-02 엘지전자 주식회사 Apparatus and Method for controlling a White Balance of OSD Screen
KR100438298B1 (en) * 2001-12-28 2004-07-02 엘지전자 주식회사 Apparatus and Method for auto-setting a max Gain

Also Published As

Publication number Publication date
KR940004434B1 (en) 1994-05-25

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