KR960008395B1 - Automatic focus control method of a camcorder - Google Patents

Automatic focus control method of a camcorder Download PDF

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Publication number
KR960008395B1
KR960008395B1 KR92023607A KR920023607A KR960008395B1 KR 960008395 B1 KR960008395 B1 KR 960008395B1 KR 92023607 A KR92023607 A KR 92023607A KR 920023607 A KR920023607 A KR 920023607A KR 960008395 B1 KR960008395 B1 KR 960008395B1
Authority
KR
South Korea
Prior art keywords
value
reference value
camcorder
control method
focus control
Prior art date
Application number
KR92023607A
Other languages
Korean (ko)
Other versions
KR940017753A (en
Inventor
Do-Hyun Cha
Original Assignee
Lg Electronics Inc
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 Lg Electronics Inc filed Critical Lg Electronics Inc
Priority to KR92023607A priority Critical patent/KR960008395B1/en
Publication of KR940017753A publication Critical patent/KR940017753A/en
Application granted granted Critical
Publication of KR960008395B1 publication Critical patent/KR960008395B1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • 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
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems
    • 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
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • 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
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element

Abstract

comparing an evaluation value(F.V) of camera recording with a reference value for automatic focusing evaluation(FV0); calculating the change of a minimum value(F-UMN) and a maximum value(F-DMX) as a percentage after storing the lower limit of F.V as F-UMN when F.V is greater than FV0, and storing the upper limit of F.V as F-DMX when F.V is smaller than FV0; and performing auto focusing by redriving a lens driving motor if a reduced limit(RL) is larger than a reference value for determination, or returning to the previous condition without redriving the motor if RL is smaller than the reference value for determination ; thereby achieving a high picture quality during recording.
KR92023607A 1992-12-08 1992-12-08 Automatic focus control method of a camcorder KR960008395B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR92023607A KR960008395B1 (en) 1992-12-08 1992-12-08 Automatic focus control method of a camcorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR92023607A KR960008395B1 (en) 1992-12-08 1992-12-08 Automatic focus control method of a camcorder

Publications (2)

Publication Number Publication Date
KR940017753A KR940017753A (en) 1994-07-27
KR960008395B1 true KR960008395B1 (en) 1996-06-26

Family

ID=19344962

Family Applications (1)

Application Number Title Priority Date Filing Date
KR92023607A KR960008395B1 (en) 1992-12-08 1992-12-08 Automatic focus control method of a camcorder

Country Status (1)

Country Link
KR (1) KR960008395B1 (en)

Also Published As

Publication number Publication date
KR940017753A (en) 1994-07-27

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