AUTOMATIC FOCUSING DEVICE FOR DIGITAL CAMERA, AND DIGITAL CAMERA EQUIPPED WITH SAME

PROBLEM TO BE SOLVED: To provide a digital camera which can display an in-focus image by speedily performing automatic focusing operation even in monitor mode wherein the shutter release button is not pressed and a picked-up image is displayed in real time in a passive type automatic focusing system...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MIYAKE TOSHIYUKI, KOBUCHI YASUJI, MAKITA KOICHI, OTOI KATSUYA
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a digital camera which can display an in-focus image by speedily performing automatic focusing operation even in monitor mode wherein the shutter release button is not pressed and a picked-up image is displayed in real time in a passive type automatic focusing system which utilizes a high-frequency component. SOLUTION: The automatic focusing operation is switched between the monitor mode and a photographic mode. In the monitor mode, a focusing position is found (S1, S2, and S9) by roughly moving a focusing lens by rough search automatic focusing and when the shutter release button is half-pressed, a focusing position is found (S4 to S8) by finely moving the focusing lens by detailed search automatic focusing for the photographic mode.