Patent ID: 7992016
Filing Date: 2011-08-02
Classification: H04N

Abstract:
1. A data transmitter comprising: a radio receiver configured to receive a radio signal from an external device; a power distributor configured to distribute power from the radio signal received by the radio receiver; a main power supply configured to supply power; a storage module configured to store information and be supplied with the power distributed by the power distributor to be readable when no power is supplied from the main power supply; a use information storage module configured to (i) store use information used by the external device and (ii) be readable while the main power supply supplies the power; a radio transmitter that is powered by power distributed by the power distributor and transmits the information read from the storage module as a radio signal to the external device when the main power supply is in a power-off state; a transmitter that is powered by the main power supply and is configured to transmit the use information read from the use information storage module to the external device in either a wireless or wired manner only when the main power supply supplies the power; and a power supply configured to switch power to be supplied between the power distributed by the power distributor and the power from the main power supply.