KR900019475A - Auto focus circuit - Google Patents

Auto focus circuit Download PDF

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Publication number
KR900019475A
KR900019475A KR1019900006969A KR900006969A KR900019475A KR 900019475 A KR900019475 A KR 900019475A KR 1019900006969 A KR1019900006969 A KR 1019900006969A KR 900006969 A KR900006969 A KR 900006969A KR 900019475 A KR900019475 A KR 900019475A
Authority
KR
South Korea
Prior art keywords
mid
video signal
auto focus
range component
focus circuit
Prior art date
Application number
KR1019900006969A
Other languages
Korean (ko)
Other versions
KR100213418B1 (en
Inventor
아끼히로 기구찌
도꾸야 후꾸다
Original Assignee
오오가 노리오
소니 가부시끼가이샤
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 오오가 노리오, 소니 가부시끼가이샤 filed Critical 오오가 노리오
Publication of KR900019475A publication Critical patent/KR900019475A/en
Application granted granted Critical
Publication of KR100213418B1 publication Critical patent/KR100213418B1/en

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/026—Averaging filters
    • 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

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

내용 없음No content

Description

오토 포커스 회로Auto focus circuit

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

제1도는 본 발명의 한 실시예의 블럭도.1 is a block diagram of one embodiment of the present invention.

Claims (2)

비디오 신호중의 중고역 성분을 검출하고, 상기 검출된 비디오 신호의 중고역 성분을 적분하여 평가치를 얻고, 상기 평가치를 사용하여 렌즈의 위치제어를 행하도록 한 오토포커스회로에서, 상기 비디오 신호중의 중고역 성분을 검출하기 위한 필터는 입력 신호에서, 렌즈계를 통했을 때의 특성과 유사한 특성을 가지는 로우패스필터를 거친 입력 신호를 감산하는 구성으로되는 것을 특징으로 하는 오토포커스 회로.A mid-range component in the video signal is detected by an autofocus circuit that detects a mid-range component in the video signal, integrates the mid-range component of the detected video signal to obtain an evaluation value, and performs lens position control using the evaluation value. And the filter for subtracting the input signal from the input signal, which has passed through the low pass filter having characteristics similar to those when passing through the lens system. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900006969A 1989-05-29 1990-05-16 Focus control apparatus for video camera KR100213418B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1135351A JP2946531B2 (en) 1989-05-29 1989-05-29 Auto focus circuit
JP135351 1989-05-29

Publications (2)

Publication Number Publication Date
KR900019475A true KR900019475A (en) 1990-12-24
KR100213418B1 KR100213418B1 (en) 1999-08-02

Family

ID=15149729

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900006969A KR100213418B1 (en) 1989-05-29 1990-05-16 Focus control apparatus for video camera

Country Status (2)

Country Link
JP (1) JP2946531B2 (en)
KR (1) KR100213418B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55114349A (en) * 1979-02-26 1980-09-03 Kanden Hankyu Shoji Kk Preparing method of molded catalyst
KR960001986B1 (en) * 1991-01-31 1996-02-08 삼성전자주식회사 Refrigerator
JP2586260B2 (en) 1991-10-22 1997-02-26 三菱電機株式会社 Adaptive blocking image coding device
JP4125331B2 (en) 2006-06-07 2008-07-30 キヤノン株式会社 Imaging apparatus and control method thereof
JP5900273B2 (en) * 2012-10-03 2016-04-06 株式会社ソシオネクスト Focus evaluation value generation device, focus evaluation value generation method, and focus evaluation value generation program

Also Published As

Publication number Publication date
JPH031668A (en) 1991-01-08
KR100213418B1 (en) 1999-08-02
JP2946531B2 (en) 1999-09-06

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