KR930018971A - Light quantity control circuit - Google Patents

Light quantity control circuit Download PDF

Info

Publication number
KR930018971A
KR930018971A KR1019920003173A KR920003173A KR930018971A KR 930018971 A KR930018971 A KR 930018971A KR 1019920003173 A KR1019920003173 A KR 1019920003173A KR 920003173 A KR920003173 A KR 920003173A KR 930018971 A KR930018971 A KR 930018971A
Authority
KR
South Korea
Prior art keywords
signal
output
video
light
input unit
Prior art date
Application number
KR1019920003173A
Other languages
Korean (ko)
Inventor
이기석
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.)
Filing date
Publication date
Application filed by 강진구, 삼성전자 주식회사 filed Critical 강진구
Priority to KR1019920003173A priority Critical patent/KR930018971A/en
Publication of KR930018971A publication Critical patent/KR930018971A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/72—Combination of two or more compensation controls
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Input (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

이 발명은 카메라의 비디오 출력신호중 Y신호(휘도신호)를 수신하여 그것을 감지하고, 그에 대응하여 적절한 제어신호를 출력하는 비데오 신호 입력부와, 상기 비데오 신호 입력부의 제어신호에 따라 모터의 속도를 제어하는 모터속도 제어부와, 상기 모터속도 제어부의 출력신호에 따라 조명의 슬릿을 조절하여 광량이 조절되는 광량 조절부로 이루어진 것을 특징으로 한다.According to the present invention, a video signal input unit which receives a Y signal (luminance signal) of a video output signal of a camera and detects it, and outputs an appropriate control signal corresponding thereto, controls the speed of the motor according to the control signal of the video signal input unit. The motor speed control unit, and the light amount control unit for controlling the amount of light by adjusting the slit of the light according to the output signal of the motor speed control unit.

Description

광량 조절회로Light quantity control circuit

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

제1도는 이 발명에 따른 광량 조절회로의 블럭도.1 is a block diagram of a light quantity control circuit according to the present invention.

제2도는 상기 제1도의 비데오 신호 입력회로의 상세 회로도.2 is a detailed circuit diagram of the video signal input circuit of FIG.

제3도는 상기 제1도의 모터 속도제어부의 상세 회로도이다.3 is a detailed circuit diagram of the motor speed controller of FIG. 1.

Claims (4)

카메라의 비데오 출력신호중 휘도신호를 수신하여 그것을 감지하고 그에 대응하는 적절한 제어신호를 출력하는 비데오 신호입력부와, 상기 비데오 신호입력부의 제어신호에 따라 모터의 속도를 제어하는 모터속도 제어부와, 상기 모터속도 제어부의 출력신호에 따라 조명의 슬릿을 조절함으로써 광량을 조절하는 광량조절부로 이루어진 것을 특징으로 한 광량 조절회로.A video signal input unit which receives a brightness signal among video output signals of the camera, detects it, and outputs an appropriate control signal corresponding thereto, a motor speed control unit controlling a motor speed according to a control signal of the video signal input unit, and the motor speed Light amount control circuit, characterized in that consisting of a light amount adjusting unit for adjusting the amount of light by adjusting the slit of the illumination according to the output signal of the control unit. 제1항에 있어서, 상기 비데오 신호 입력부는, 출력되는 비데오 신호에서 휘도신호를 검출하여 비교하는 휘도신호 감지부(10)와, 상기 휘도신호 감지부(10)의 출력측에 연결되어 출력되는 휘도신호의 레벨에 따라 제어신호를 발생시키는 제어신호 발생부(20)로, 이루어진 광량 조절회로.The video signal input unit of claim 1, wherein the video signal input unit is connected to an output side of the brightness signal detection unit 10 and a brightness signal detection unit 10 for detecting and comparing the brightness signals from the output video signal. A control signal generator 20 for generating a control signal in accordance with the level of the light quantity control circuit. 제1항에 있어서, 상기 휘도신호 감지부(10)가, 반전단(-)으로 기준전압(Vref)이 제공되고 비반전단(+)으로 비데오 출력이 제공되는 오피엠프(OP1)로 구성되는 광량조절회로.The amount of light of claim 1, wherein the luminance signal detector 10 comprises an op amp OP1 provided with a reference voltage Vref to an inverting terminal (−) and a video output to a non-inverting terminal (+). Control circuit. 제1항에 있어서, 상기 반전단(-)으로 상기 오피엠프(OP1)의 출력이 제공되도록 연결되고 비반전단(+)으로 바이어스용 저항(R4,RD)에 의해 기준전위가 제공되도록 연결되는 오피엠프(OP2)와, 상기 오피엠프(OP2)의 출력신호에 따라 스위칭되는 트랜지스터(Q1)로, 이루어지는 광량 조절회로.The opi of claim 1, wherein the op amp is connected to provide the output of the op amp OP1 to the inverting terminal (−), and the op amp is connected to the non-inverting terminal (+) to provide a reference potential by the bias resistors R4 and RD. And an amplifier (OP2) and a transistor (Q1) switched in accordance with the output signal of the op amp (OP2). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920003173A 1992-02-28 1992-02-28 Light quantity control circuit KR930018971A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920003173A KR930018971A (en) 1992-02-28 1992-02-28 Light quantity control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920003173A KR930018971A (en) 1992-02-28 1992-02-28 Light quantity control circuit

Publications (1)

Publication Number Publication Date
KR930018971A true KR930018971A (en) 1993-09-22

Family

ID=67257231

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920003173A KR930018971A (en) 1992-02-28 1992-02-28 Light quantity control circuit

Country Status (1)

Country Link
KR (1) KR930018971A (en)

Similar Documents

Publication Publication Date Title
KR920020995A (en) Fluorescent lamp lighting equipment
KR930008554A (en) Comparator
KR930007232A (en) Video camera device
GB1576612A (en) Vehicle headlamp control circuits
KR950015226A (en) Second harmonic generation method and device
SE8604821D0 (en) FINAL STEP WITH AUTOMATIC LEVEL CONTROL FOR NETWORK SIGNAL
KR930018971A (en) Light quantity control circuit
KR850000867A (en) Color tv receiver
KR910019480A (en) Fluorescent Lamp Controller with Light Sensing Circuit
JPS5694371A (en) Exposure control device
KR930003727A (en) TV screen automatic adjustment circuit
KR920022035A (en) Aperture opening amount control circuit of camera
KR950004914A (en) Brightness control circuit in the viewfinder of the camcorder
KR970014478A (en) Inverter stand that adjusts the brightness according to the ambient light
KR910000672Y1 (en) Auto control circuit of lamp
KR100824191B1 (en) Circuit for compensating rank tolerance of sensor in backlighting inverter
KR960028212A (en) Light auto on / off circuit of video camera
KR920019166A (en) Video light device
KR940000363Y1 (en) Automatic gain control circuit
JPS5949528B2 (en) Photometric circuit
KR960001256Y1 (en) Automatic control device of color gain
KR940001632Y1 (en) Automatic light control circuit in camcorder
KR980004310A (en) Contrast correction circuit of monitor
JPH02223848A (en) Reflected light detecting device
KR970017128A (en) DC circuit for bias control

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application