| 摘要 |
<p>A communication apparatus includes: an antenna (41); a first communication means (52) that performs near field communication with a non-contact card via the antenna; a photodetecting means (43,56) that is provided near the antenna and detects an amount of incoming light; and a near field communication control means (51) that activates the first communication means when the amount of incoming light becomes less than a predetermined threshold value, the communication apparatus being driven by a battery (57).
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