Okita, Kenji NEC Corporation A battery built-in wireless ID card unit including a magnetic field detection section which generates an electromotive force from a received magnetic field to turn on a power switch of a built-in battery, and a control section which transmits an ID code by radio after the power switch is turned on, thereby turning off the power switch.
(Okita, Kenji NEC Corporation A battery built-in wireless ID card unit; including; a magnetic field detection section which generates an electromotive force from a received magnetic field) (the power switch; is turned on; ) (a magnetic field detection section; generates; an electromotive force) (a received magnetic field; to turn; ) (a control section; transmits; an ID code; T:after the power switch is turned on)
Okita, Kenji NEC Corporation A battery built-in wireless ID card unit the power switch a magnetic field detection section a received magnetic field a control section
including is turned on generates to turn transmits
a magnetic field detection section which generates an electromotive force from a received magnetic field
an electromotive force
an ID code T:after the power switch is turned on