Terminal and method for controlling the same
The terminal may include a touch panel including first electrodes arranged in a first direction and second electrodes arranged in the second direction intersecting the first direction, a display panel attached to the touch panel and to display an image, and a processor to control the touch panel and the display panel. In a measuring mode, the processor is configured to: apply a driving signal to the touch panel, the touch panel being configured to form an electric field and/or magnetic field when the driving signal is applied, and determine body composition of a user based on a sensing signal output from the touch panel in accordance with eddy current, the eddy current being induced to a body of the user by the electric field and/or magnetic field formed around the touch panel.
1 . A terminal comprising:
a touch panel having a first electrode and a second electrode;
a display panel attached to the touch panel and to display an image;
a coil member disposed on a first surface of the display panel; and
a processor to control the touch panel, the display panel, and the coil member,
wherein, in a measuring mode, the processor is configured to:
apply a current to the coil member to form an electric field and/or magnetic field and to induce an eddy current in a body of a user and apply a driving current to the first electrode, and
determine body composition of the user based on a capacitance formed between the first electrode and the second electrode in accordance with the eddy current induced to the body of the user.
2 . The terminal according to claim 1 , wherein the coil member comprises a coil antenna, and the terminal further comprises:
a signal generator to generate the current having a predetermined frequency to be applied to the coil member;
a rectifier to rectify a current received from the coil member and to output a rectified current; and
a switch unit to electrically connect or disconnect between the signal generator, the rectifier, and the coil member.
3 . The terminal according to claim 2 , wherein, in the measuring mode, the processor is configured to control the switch unit to electrically connect the signal generator and the coil antenna.
4 . The terminal according to claim 2 , wherein, in a sensing mode, the processor is configured to control the switch unit to electrically connect the rectifier and the coil antenna, and the rectifier is configured to rectify the current received from the coil antenna by an induced electromotive force when the induced electromotive force is generated in the coil antenna and to output the rectified current.
5 . A method for controlling a terminal having a touch panel including a first electrode, a second electrode, and a coil antenna, the method comprising the steps of:
applying current to the coil antenna to form an electric field and/or magnetic field and to induce an eddy current in a body of a user and applying a driving current to the first electrode in a measuring mode; and
determining body composition of the user based on a capacitance formed between the first electrode and the second electrode in accordance with the eddy current induced to the body of the user.
6 . The method according to claim 5 , wherein the terminal further comprises a signal generator to generate the current of a predetermined frequency to be applied to the coil antenna, a rectifier to rectify a received current and to output a rectified current, and a switch unit to electrically connect or disconnect between the signal generator, the rectifier, and the coil antenna, and wherein:
the switch unit is further controlled to electrically connect the rectifier and the coil antenna before applying the current to the coil antenna.
7 . The method according to claim 6 , further comprising the steps of:
controlling the switch unit to electrically connect the rectifier and the coil antenna in a sensing mode; and
supplying power to the terminal using the current received from the rectifier.