KR970056977A - Electronic shutter speed control system of CCD camera - Google Patents

Electronic shutter speed control system of CCD camera Download PDF

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Publication number
KR970056977A
KR970056977A KR1019950069725A KR19950069725A KR970056977A KR 970056977 A KR970056977 A KR 970056977A KR 1019950069725 A KR1019950069725 A KR 1019950069725A KR 19950069725 A KR19950069725 A KR 19950069725A KR 970056977 A KR970056977 A KR 970056977A
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KR
South Korea
Prior art keywords
shutter
shutter speed
mode
output
speed control
Prior art date
Application number
KR1019950069725A
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Korean (ko)
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KR0183808B1 (en
Inventor
박성욱
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950069725A priority Critical patent/KR0183808B1/en
Publication of KR970056977A publication Critical patent/KR970056977A/en
Application granted granted Critical
Publication of KR0183808B1 publication Critical patent/KR0183808B1/en

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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
    • H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/667—Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes
    • 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
    • H04N23/71—Circuitry for evaluating the brightness variation

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

Abstract

CCD 카메라의 전자 셔터 속도제어 시스템이 포함되어 있다. 본 발명은, CCD에 입사되는 광량에 따라서 자동으로 셔터 속도를 증가 및 감소시킬 수 있으며, 외부에서 고정된 셔터 속도를 제공할 수도 있다.An electronic shutter speed control system of the CCD camera is included. The present invention can automatically increase and decrease the shutter speed according to the amount of light incident on the CCD, and can also provide a fixed shutter speed externally.

또한 가변의 셔터 속도를 갖는 데, 낮은 셔터 속도 제어 구간에서는 전하 소거 펄스의 간격을 크게 하고, 높은 셔터 속도 제어 구간에서는 상기 전하 소거 펄스의 간격을 작게함으로써 최대 셔터 속도 제어를 1/125700초까지 가능하게 할 수 있는 장점이 있다.In addition, it has a variable shutter speed, and the maximum shutter speed control is possible up to 1/125700 seconds by increasing the interval of the charge erasing pulse in the low shutter speed control section and decreasing the interval of the charge erasing pulse in the high shutter speed control section. There is an advantage to this.

Description

CCD 카메라의 전자 셔터 속도제어 시스템Electronic shutter speed control system of CCD camera

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

제1도는 본 발명에 따른 전자 셔터 속도제어 시스템의 블럭도.1 is a block diagram of an electronic shutter speed control system according to the present invention.

제2도는 제1도의 전하 소거 펄스 발생방법을 나타내는 타이밍도.2 is a timing diagram showing a method of generating a charge erase pulse of FIG.

Claims (3)

입사되는 빛을 전기적 신호로 변환하는 CCD와, 상기 CCD의 출력을 받아 영상 신호처리를 하는 프로세서와, 상기 프로세서에서 신호처리된 출력신호를 이용해 입사된 빛의 양을 판단하여 셔터 속도의 증감 및 특정 모드로의 정지를 수행하는 셔터 모드 디텍터를 갖는 CCD 카메라의 전자 셔터 속도제어 시스템에 있어서, 상기 셔터 모드 디텍터의 출력을 받아, 수직구동(Vertical Drive) 신호를 클락으로 하여 셔터 제어를 위한 모드를 결정하는 셔터 모드 카운터; 상기 셔터 모드 카운터의 출력을 타임 형태로 변경하여 2진수 값을 출력하는 모드 타임 컨버터; 외부에서 고정된 셔터 속도 모드를 셋팅(Setting)하기 위하여 고정모드 제어신호에 따른 2진수 값을 출력하는 고정모드 타임 컨버터; 제어신호를 클락으로하여 한 필드 내에서의 실제 셔터 속도값을 발생하는 셔터 타이밍 제어 블럭; 상기 모드 타임 컨버터 또는 상기 고정모드 타임 컨버터에서 발생된 2진수의 출력값과 상기 셔터 타이밍 제어블럭에서 발생된 2진수의 출력값을 비교하여, 셔터 속도를 결정하는 전하 소거 펄스를 발생시키는 가변 셔터 발생기를 구비하는 것을 특징으로 하는 CCD 카메라의 전자 셔터 속도제어 시스템.The CCD converts incident light into an electrical signal, a processor which processes the image signal by receiving the CCD output, and an output signal processed by the processor to determine the amount of incident light to increase or decrease the shutter speed. In an electronic shutter speed control system of a CCD camera having a shutter mode detector for performing a stop to a mode, a mode for shutter control is determined by using a vertical drive signal as a clock by receiving the output of the shutter mode detector. A shutter mode counter; A mode time converter for outputting a binary value by changing the output of the shutter mode counter into a time form; A fixed mode time converter configured to output a binary value according to a fixed mode control signal to set a fixed shutter speed mode externally; A shutter timing control block which generates an actual shutter speed value in one field by using the control signal as a clock; A variable shutter generator for generating a charge erase pulse for determining a shutter speed by comparing the binary output value generated by the mode time converter or the fixed mode time converter with the binary output value generated by the shutter timing control block. Electronic shutter speed control system of the CCD camera, characterized in that. 제1항에 있어서, 상기 모드 타임 컨버터, 상기 고정모드 타임 컨버터, 및 상기 셔터 타이밍 제어블럭에서 발생된 출력값은 12비트의 2진수 값인 것을 특징으로 하는 CCD 카메라의 전자 셔터 속도제어 씨스템.The electronic shutter speed control system of claim 1, wherein an output value generated from the mode time converter, the fixed mode time converter, and the shutter timing control block is a 12-bit binary value. 제1항에 있어서, 상기 가변 셔터 발생기는 전하 소거 펄스를 한 필드 내에서 서로 다른 간격으로 발생함으로써 고속 및 높은 배율의 셔터 속도 제어를 가능하게 하는 것을 특징으로 하는 CCD 카메라의 전자 셔터 속도제어 씨스템.The electronic shutter speed control system of claim 1, wherein the variable shutter generator generates charge erase pulses at different intervals within a field to enable high speed and high magnification of shutter speed control. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950069725A 1995-12-30 1995-12-30 Electronic shutter speed control system for ccd camera KR0183808B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950069725A KR0183808B1 (en) 1995-12-30 1995-12-30 Electronic shutter speed control system for ccd camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950069725A KR0183808B1 (en) 1995-12-30 1995-12-30 Electronic shutter speed control system for ccd camera

Publications (2)

Publication Number Publication Date
KR970056977A true KR970056977A (en) 1997-07-31
KR0183808B1 KR0183808B1 (en) 1999-05-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100648801B1 (en) * 2005-07-19 2006-11-23 삼성테크윈 주식회사 Flickerless security camera and flicker reduction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100648801B1 (en) * 2005-07-19 2006-11-23 삼성테크윈 주식회사 Flickerless security camera and flicker reduction method

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Publication number Publication date
KR0183808B1 (en) 1999-05-01

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