KR950030606A - Camcorder Auto Focus - Google Patents

Camcorder Auto Focus Download PDF

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Publication number
KR950030606A
KR950030606A KR1019940008890A KR19940008890A KR950030606A KR 950030606 A KR950030606 A KR 950030606A KR 1019940008890 A KR1019940008890 A KR 1019940008890A KR 19940008890 A KR19940008890 A KR 19940008890A KR 950030606 A KR950030606 A KR 950030606A
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KR
South Korea
Prior art keywords
peak value
data
screen
input
screen position
Prior art date
Application number
KR1019940008890A
Other languages
Korean (ko)
Inventor
임성준
Original Assignee
이헌조
엘지전자 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 이헌조, 엘지전자 주식회사 filed Critical 이헌조
Priority to KR1019940008890A priority Critical patent/KR950030606A/en
Publication of KR950030606A publication Critical patent/KR950030606A/en

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Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B13/00Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32Means for focusing
    • G03B13/34Power focusing
    • G03B13/36Autofocus systems
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K19/00Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/20Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits

Abstract

본 발명은 캠코더의 자동 초점 조절장치에 관한 것으로서, 이는 피사체가 화면의 중앙에 위치하지 않고 화면의 한쪽방향에 위치한 경우에도 초점대상 영역을 선명한 피사체가 있는 방향으로 설정하여 화면의 흐트러짐 없이 항상 자동 초점이 이루어지도록 한 것이다. 이와 같은 본 발명은 촬상관 구동수단으로부터 얻어진 수직동기 및 수평동기신호를 이용하여 전화면에 대한 위치정보를 생성 출력하는 화면위치 생성수단과, 디지탈로 변환되어 입력되는 현 필드의 데이타 피크치와 이전까지의 데이타 피크치와를 비교 선택하여 펄스신호를 발생하는 피크치 검출수단과, 상기 피크치 검출수단에서 펄스신호가 발생시 마다 상기 화면위치 발생수단에서 발생된 1필드분의 화면위치 정보를 래치하는 데이타 저장수단과, 상기 데이타저장수단의 최후의 값을 초점평가치로 판정하고 자동초점을 수행하는 초점제어수단으로 이루어짐으로써 달성된다.The present invention relates to an auto focusing apparatus of a camcorder, which sets an area to be in focus in a direction in which a sharp subject is located even when the subject is not located at the center of the screen but always on the screen without disturbing the screen. This is done. As described above, the present invention provides screen position generating means for generating and outputting position information on the full screen using vertical and horizontal synchronous signals obtained from the image capillary driving means, and data peak values of the current field which are converted into digital and inputted to the previous. A peak value detection means for generating a pulse signal by comparing and selecting a data peak value, data storage means for latching screen position information for one field generated by the screen position generation means each time a pulse signal is generated in the peak value detection means; A final value of the data storage means is determined by focus evaluation value and is achieved by focus control means for performing auto focus.

Description

캠코더의 자동 초점 조절장치Camcorder Auto Focus

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

제3도는 본 발명 캠코더의 자동 초점 조절장치의 구성도, 제4도는 제3도에 따른 화면 어드레스 할당을 보인도, 제5도는 제3도에 따른 자동 초점 대상영역을 보인도.3 is a configuration diagram of an auto focusing apparatus of a camcorder of the present invention, FIG. 4 shows screen address allocation according to FIG. 3, and FIG. 5 shows auto focus target area according to FIG.

Claims (4)

입력 수직동기 및 수평동기를 이용하여 전화면에 대한 위치정보를 생성 출력하는 화면위치 생성수단과, 입력되는 현 필드의 데이타 피크치와 이전까지의 데이타 피크치와를 비교 선택하여 펄스를 발생하는 피크치 검출수단과, 상기 피크치 검출수단에서 펄스가 발생시 마다 상기 화면 위치 발생수단에서 발생된 1필드분의 화면위치 정보를 래치하는 데이타의 저장수단과, 상기 데이타 저장수단의 최후의 값을 초점조절 대상으로 판정하는 자동초점을 수행하는 초점제어수단으로 구성한 것을 특징으로 한 캠코더의 자동초점 조절장치.Screen position generating means for generating and outputting position information on the full screen using input vertical sync and horizontal sync, and peak value detecting means for generating a pulse by comparing and selecting the data peak value of the current field input to the previous data peak value. And data storage means for latching screen position information for one field generated by the screen position generating means each time a pulse is generated by the peak value detecting means, and determining a final value of the data storing means as a focus adjustment target. An autofocus control apparatus for a camcorder, characterized by comprising a focus control means for performing autofocus. 제1항에 있어서, 화면위치 생성수단은 수평동기를 기준으로 하여 일정수의 클럭이 입력될때 마다 카운트값을 증가시켜 출력하는 수평카운터부와, 상기 수직동기신호를 기준으로 하여 일정수의 수평동기신호가 입력될때 마다 카운트값을 증가시켜 출력하는 수직 카운터부로 구성한 것을 특징으로 한 캠코더의 자동 초점 조절장치.The display apparatus of claim 1, wherein the screen position generating means comprises: a horizontal counter unit for increasing a count value every time a predetermined number of clocks are input based on horizontal synchronization, and a predetermined number of horizontal synchronization based on the vertical synchronization signal; The camcorder's autofocus control device comprising a vertical counter unit for increasing the count value each time a signal is input. 제1항에 있어서, 피크치 검출수단은 현 필드의 데이타를 입력 클럭에 동기시켜 출력하는 제1플립플롭과 상기 제1플립플롭에서 얻어진 현 필드의 데이타 피크치와 그 현 필드에 대한 이전까지의 데이타 피크치와를 비교하여 결과신호를 출력하는 피크치 비교기와, 상기 피크치 비교기에서 얻어진 결과신호에 따라 제1플립플롭에서 입력되는 현 필드의 데이타 또는 이전까지의 데이타 피크치를 선택하여 출력하는 피크치 선택부와, 상기 피크치 선택부에서 선택된 필드의 데이타 상태가 변화될때까지 현상태를 유지하여 피크치 선택부 및 피크치 비교기로 입력하는 제2플립플롭과, 상기 피크치 비교기의 제어신호와 입력 클럭을 논리곱하여 데이타 저장수단을 제어하는 앤드게이트로 구성함을 특징으로 한 캠코더의 자동 초점 조절장치.2. The peak value detecting means according to claim 1, wherein the peak value detecting means comprises: a first flip flop for synchronizing the current field data with an input clock and outputting the data peak value of the current field obtained from the first flip flop, and the previous data peak value for the current field. A peak value comparator for comparing with and outputting a result signal, a peak value selecting part for selecting and outputting data of the current field or the previous data peak value input from the first flip-flop according to the result signal obtained by the peak value comparator; The second flip-flop inputted to the peak value selector and the peak value comparator and maintained by the state until the data state of the field selected by the peak value selector changes, and the control signal and the input clock of the peak comparator are logically multiplied to control the data storage means. Camcorder autofocus control, characterized by an endgate. 제1항에 있어서, 데이타 저장수단은 상기 1필드분의 화면위치 정보를 래치하는 플립플롭인 것을 특징으로 한 캠코더의 자동초점 조절장치.2. The apparatus of claim 1, wherein the data storage means is a flip-flop for latching the screen position information for the one field. ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is to be disclosed based on the initial application.
KR1019940008890A 1994-04-26 1994-04-26 Camcorder Auto Focus KR950030606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940008890A KR950030606A (en) 1994-04-26 1994-04-26 Camcorder Auto Focus

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Application Number Priority Date Filing Date Title
KR1019940008890A KR950030606A (en) 1994-04-26 1994-04-26 Camcorder Auto Focus

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KR950030606A true KR950030606A (en) 1995-11-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100358859B1 (en) * 2000-05-19 2002-10-31 주식회사 씨앤비텍 Method for automatic focus control in a camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100358859B1 (en) * 2000-05-19 2002-10-31 주식회사 씨앤비텍 Method for automatic focus control in a camera

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