KR920015862A - Automatic light control device and method of video camera - Google Patents

Automatic light control device and method of video camera Download PDF

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Publication number
KR920015862A
KR920015862A KR1019910001860A KR910001860A KR920015862A KR 920015862 A KR920015862 A KR 920015862A KR 1019910001860 A KR1019910001860 A KR 1019910001860A KR 910001860 A KR910001860 A KR 910001860A KR 920015862 A KR920015862 A KR 920015862A
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KR
South Korea
Prior art keywords
signal
level
brightness
luminance
shutter speed
Prior art date
Application number
KR1019910001860A
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Korean (ko)
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KR940002708B1 (en
Inventor
문재철
Original Assignee
강진구
삼성전자 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.)
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Publication date
Application filed by 강진구, 삼성전자 주식회사 filed Critical 강진구
Priority to KR1019910001860A priority Critical patent/KR940002708B1/en
Priority to JP3287695A priority patent/JPH04319877A/en
Publication of KR920015862A publication Critical patent/KR920015862A/en
Application granted granted Critical
Publication of KR940002708B1 publication Critical patent/KR940002708B1/en

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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01Frequency selective two-port networks
    • H03H7/12Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12Analogue/digital converters

Abstract

내용 없음No content

Description

비디오카메라의 자동광량조절장치 및 그 방법Automatic light control device and method of video camera

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

제2도는 본 발명에 의한 자동광량조절장치의 전체구성블럭도, 제4도는 본 발명에 채용된 마이콤에 의해 수행되는 자동광량조절방법을 도시한 플로우 챠트도, 제3도는 제2도에 의한 자동광량조절장치의 입출력신호의 시간파형도.FIG. 2 is a block diagram showing the overall configuration of the automatic light control device according to the present invention. FIG. 4 is a flow chart showing the automatic light control method performed by the microcomputer employed in the present invention. FIG. Time waveform diagram of input / output signal of the light quantity control device.

Claims (4)

셔터속도에 대응하는 시간동안 피사체에 대한 광학정보를 전기적인 신호로 변환시키는 촬상소자와, 상기 전기적인 신호를 영상처리한 후 휘도신호를 검출하는 영상신호 처리수단과, 게이팅펄스에 의해 화면중앙부의 휘도신호량을 검출하기 위한 게이팅수단과, 상기 게이팅수단의 휘도신호량이 저역필터링된 후, 출력되는 직류레벨신호를 디지탈신호로 변환하는 휘도레벨검출수단과, 디지탈데이타로 변환한 현상태 화면의 휘도신호레벨과 기준레벨을 비교하여 상기 촬상수단의 적정한 셔터속도값을 출력하는 제어수단을 포함함을 특징으로 하는 비디오카메라의 자동광량조절장치.An image pickup device for converting optical information about a subject into an electrical signal for a time corresponding to a shutter speed, image signal processing means for detecting a luminance signal after image processing the electrical signal, and a gating pulse Gating means for detecting the luminance signal amount, luminance level detecting means for converting the output DC level signal into a digital signal after the luminance signal amount of the gating means is low-pass filtered, and the luminance signal of the current state screen converted into digital data. And a control means for comparing the level with the reference level and outputting an appropriate shutter speed value of the image pickup means. 제1항에 있어서, 상기 휘도레벨 검출수단은 수직동기신호 주기마다 휘도레벨의 변화량을 검출함을 특징으로 하는 비디오카메라의 자동광량조절장치.2. The automatic light amount control apparatus of a video camera according to claim 1, wherein said brightness level detecting means detects a change in brightness level at every vertical synchronization signal cycle. 제1항에 있어서, 상기 휘도레벨 검출수단은 상기 게이팅수단의 출력신호를 직류레벨신호로 변환시키는 저역통과필터로 구성된 적분부와, 상기 직류레벨신호를 증폭시키는 중폭부와, 상기 증폭부의 출력신호를 마이콤의 제어신호에 따라 디지탈 데이타로 변환시키는 A/D변환부를 포함함을 특징으로 하는 비디오카메라의 자동광량조절장치.2. The apparatus of claim 1, wherein the brightness level detecting means comprises an integrating portion comprising a low pass filter for converting the output signal of the gating means into a DC level signal, a medium width portion for amplifying the DC level signal, and an output signal of the amplifying portion. And an A / D conversion unit for converting the digital data into digital data according to a control signal of the microcomputer. 수직동기신호 주기마다 현상태 화면의 휘도신호를 디지탈신호로 변환하는 휘도신호 레벨검출단계와, 상기 휘도신호레벨검출단계로 부터 검출된 현상태 화면의 휘도레벨과 기준레벨을 비교하는 비교단계와, 상기 비교단계로 부터 현상태 화면의 휘도레벨이 기준레벨 보다 클때는 셔터속도를 증가시켜 광량을 감소시키는 셔터속도 증가단계와, 상기 비교단계로부터 현상태의 휘도레벨이 기준레벨보다 작을때는 셔터속도를 감소시켜 광량을 증가시키는 셔터속도 감소 단계를 포함함을 특징으로 하는 비디오카메라의 자동광량조절방법.A brightness signal level detection step of converting the brightness signal of the current status screen into a digital signal at each vertical synchronization signal period, and a comparison step of comparing the brightness level and the reference level of the current status screen detected from the brightness signal level detection step; When the luminance level of the status screen is greater than the reference level from the step, the shutter speed increasing step decreases the amount of light by increasing the shutter speed; and when the luminance level of the status status is smaller than the reference level from the comparing step, the shutter speed is decreased to reduce the amount of light. And a shutter speed decreasing step of increasing. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910001860A 1991-01-31 1991-01-31 Auto light control apparatus and method of video camera KR940002708B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019910001860A KR940002708B1 (en) 1991-01-31 1991-01-31 Auto light control apparatus and method of video camera
JP3287695A JPH04319877A (en) 1991-01-31 1991-11-01 Apparatus and method for automatic adjustment of quantity of light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910001860A KR940002708B1 (en) 1991-01-31 1991-01-31 Auto light control apparatus and method of video camera

Publications (2)

Publication Number Publication Date
KR920015862A true KR920015862A (en) 1992-08-27
KR940002708B1 KR940002708B1 (en) 1994-03-30

Family

ID=19310704

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910001860A KR940002708B1 (en) 1991-01-31 1991-01-31 Auto light control apparatus and method of video camera

Country Status (2)

Country Link
JP (1) JPH04319877A (en)
KR (1) KR940002708B1 (en)

Also Published As

Publication number Publication date
KR940002708B1 (en) 1994-03-30
JPH04319877A (en) 1992-11-10

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