Image display device, image display system, and method of controlling image display device

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United States of America Patent

PATENT NO 8933779
SERIAL NO

13787986

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Importance

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Abstract

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An image display device includes: a clock section for timing current date/time information including a date and a time; an expiration date/time storage section for storing expiration date/time information as information of a date/time until which use of the image display device is allowed; a password accepting section for accepting input of a password encoded based on predetermined expiration date/time information; a decoding section for decoding the predetermined expiration date/time information from information of the password accepted by the password accepting section; a comparison section for comparing the predetermined expiration date/time information decoded by the decoding section and the current date/time information timed by the clock section with each other; and an expiration date/time update section for storing the predetermined expiration date/time information in the expiration date/time storage section if the predetermined expiration date/time information decoded is a date/time one of on and later than the current date/time information.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
SEIKO EPSON CORPORATION1-6 SHINJUKU 4-CHOME SHINJUKU-KU TOKYO 160-8801

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kobayashi, Makoto Matsumoto, JP 647 7424

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