KR960036558A - Camera with image correction function by photoconductive cell - Google Patents

Camera with image correction function by photoconductive cell Download PDF

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Publication number
KR960036558A
KR960036558A KR1019950006743A KR19950006743A KR960036558A KR 960036558 A KR960036558 A KR 960036558A KR 1019950006743 A KR1019950006743 A KR 1019950006743A KR 19950006743 A KR19950006743 A KR 19950006743A KR 960036558 A KR960036558 A KR 960036558A
Authority
KR
South Korea
Prior art keywords
voltage
photoconductive
signal
cell
white
Prior art date
Application number
KR1019950006743A
Other languages
Korean (ko)
Inventor
나대희
Original Assignee
배순훈
대우전자 주식회사
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 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950006743A priority Critical patent/KR960036558A/en
Publication of KR960036558A publication Critical patent/KR960036558A/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/71—Charge-coupled device [CCD] sensors; Charge-transfer registers specially adapted for CCD sensors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

본 발명은 광도전(光導電)셀에 의한 영상보정기능을 구비한 CCD (Charge Coupled Device:전하결합소자) 카메라에 관한 것으로, 특히 감시용, 방법용 및 가전용등으로 사용되는 CCD 카메라에 외부광을 감지하도록 광도전(CdS)셀을 설치함으로써, 외부광의 밝기정도에 따라서 비디오신호의 화이트레벨(White Level)을 자동적으로 조절하도록 하는 광도전셀에 의한 영상보정기능을 구비한 CCD카메라에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CCD (Charge Coupled Device) camera having an image correction function by a photoconductive cell, and more particularly to a CCD camera used for monitoring, method, and home appliances. A CCD camera having an image correction function by a photoconductive cell for automatically adjusting a white level of a video signal according to the brightness of external light by providing a photoconductive (CdS) cell to sense light. will be.

본 발명의 기술적인 구성은 CCD소자(1), 신호처리부(2), 동기신호발생부(3), 수직동기 구동부(4)를 포함하는 CCD 카메라에 있어서 CCD카메라에서 촬영한 광량에 따라 출력전압이 가변되는 광도전셀(10); 상기 광도전셀(10)로부터 입력되는 아날로그신호를 디지탈신호로 변환하고 이 변환된 전압과 기준전압을 비교판단하여 화이트클럽 제어전압(VC)을 결정하며 이 결정된 제어전압을 아날로그전압으로 다시 변환하여 신호처리부로 제공하는 화이트클럽 제어부(20)를 구비함에 의한다.The technical configuration of the present invention is a CCD camera including a CCD element 1, a signal processor 2, a synchronization signal generator 3, and a vertical synchronous driver 4 according to the amount of light taken by the CCD camera. The variable photoconductive cell 10; Converts the analog signal input from the photoconductive cell 10 into a digital signal, compares the converted voltage with a reference voltage, determines the white club control voltage VC, and converts the determined control voltage back into an analog voltage. By providing a white club control unit 20 to the signal processing unit.

Description

광도전 셀에 의한 영상보정기능을 구비한 카메라Camera with image correction function by photoconductive cell

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명에 따른 광도전셀에 의한 영상보정기능을 구비한 CCD카메라의 구성도, 제3도는 본 발명에 따라 제2도에 도시한 화이트클립제어부(20)의 구체회로도, 제4도는 본 발명에 따른 동작설명을 위한 그래프.2 is a configuration diagram of a CCD camera having an image correction function by a photoconductive cell according to the present invention, and FIG. 3 is a detailed circuit diagram of the white clip control unit 20 shown in FIG. 2 according to the present invention. Graph for explaining the operation according to the present invention.

Claims (2)

CCD소자(1), 신호처리부(2), 동기신호발생부(3), 수직동기 구동부(4)를 포함하는 CCD카메라에 있어서, CCD카메라에서 촬영한 광량에 따라 출력전압이 가변되는 광도전셀(10); 상기 광도전셀(10)로 부터 입력되는 아날로그신호를 디지탈신호로 변환하고 이 변환된 전압과 기준전압을 비교판단하여 화이트클립 제어전압(VC)을 결정하며 이 결정된 제어전압(VC)을 아날로그전압으로 다시 변환하여 신호 처리부(2)로 제공하는 화이트클립 제어부(20)를 구비함을 특징으로 하는 광도전 (Cds)셀에 의한 영상보정기능을 구비한 카메라.In a CCD camera including a CCD element (1), a signal processor (2), a synchronization signal generator (3), and a vertical synchronous driver (4), a photoconductive cell whose output voltage is varied in accordance with the amount of light captured by the CCD camera 10; The analog signal input from the photoconductive cell 10 is converted into a digital signal, and the white voltage control voltage VC is determined by comparing the converted voltage with the reference voltage, and the determined control voltage VC is converted into an analog voltage. And a white clip control unit (20) for converting the signal back to the signal processing unit (2). 제1항에 있어서, 상기 화이트 클립제어부(20)는 전원전압(+Vcc)이 저항(R1), 외부의 광도전(Cds)셀 (10)의 저항치, 저항(R2)에 의하여 분배되어 상기 외부의 광도전(Cds)셀(10)의 저항치와 저항(R2)에 분배된 전압을 디지탈신호로 변환하는 A/D변환기(ADC)(21)와, 상기 A/D변환기(21)에서 변환된 디지탈신호를 입력받아 사전에 설정된 기준전압과 비교하여 화이트클럽 제어전압을 결정하여 출력하는 마이컴(22)과, 상기 마이컴(22)에서 출력되는 화이트클럽 제어신호를 아날로그신호로 변환하는 D/A변환기(DAC)(20)로 구성됨을 특징으로 하는 광도전(Cds)셀에 의한 영상보정기능을 구비한 카메라.The power supply voltage (+ Vcc) of the white clip control unit 20 is distributed by the resistor R1, the resistance of the external photoconductive (Cds) cell 10, and the resistor R2. An A / D converter (ADC) 21 for converting the resistance value of the photoconductive (Cds) cell 10 and the voltage divided by the resistor R2 into a digital signal, and the A / D converter 21 A microcomputer 22 that receives a digital signal and compares it with a preset reference voltage to determine and output a white club control voltage, and a D / A converter that converts the white club control signal output from the microcomputer 22 into an analog signal. (DAC) a camera having an image correction function by a photoconductive (Cds) cell, characterized in that consisting of 20. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950006743A 1995-03-28 1995-03-28 Camera with image correction function by photoconductive cell KR960036558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950006743A KR960036558A (en) 1995-03-28 1995-03-28 Camera with image correction function by photoconductive cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950006743A KR960036558A (en) 1995-03-28 1995-03-28 Camera with image correction function by photoconductive cell

Publications (1)

Publication Number Publication Date
KR960036558A true KR960036558A (en) 1996-10-28

Family

ID=66553086

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950006743A KR960036558A (en) 1995-03-28 1995-03-28 Camera with image correction function by photoconductive cell

Country Status (1)

Country Link
KR (1) KR960036558A (en)

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