DETECTION METHOD FOR FORGETTING OF LENS CAP REMOVAL AND VIDEO RECORDING APPARATUS

• Main Authors: ISHIKAWA YOSHIKI, KOMURA KOJI
• Format: Patent
• Language: English
• Published: 05.02.2009
• Subjects: 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; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

PROBLEM TO BE SOLVED: To provide detection method for forgetting of lens cap removal by which opening/closing of a lens cap is electronically and accurately judged taking leaking light of the lens cap into consideration without adding a special switch for detecting the opening/closing of the lens cap, thereby an erroneous operation due to power disconnection is notified to user. SOLUTION: The opening/closing of the lens cap can be highly accurately detected by taking into consideration a detection result of an AGC signal and a detection result of luminance average, and useless battery consumption is suppressed by displaying warning to a user, and at the same time automatically disconnecting the power for a user who is not aware of the warning. COPYRIGHT: (C)2009,JPO&INPIT