Mobile terminal comprising stylus pen and touch panel, and control method therefor

A mobile terminal comprising:

• a touch panel including a plurality of touch panel electrodes;
• a stylus pen configured to perform transmission and reception of an electric signal with the touch panel using capacitive coupling and without using a separate power supply to the stylus pen;
• and
• a controller configured to:
• when the electric signal is received from the stylus pen through the capacitive coupling, detect a location of the stylus pen with respect to the touch panel based on signal magnitudes of at least two touch panel electrodes from which the electrical signal is detected,
• wherein the controller is further configured to:
• detect a point where the stylus pen is located between at least two touch panel electrodes based on at least two ratios of signal magnitudes of the at least two touch panel electrodes from which the electrical signal is detected,
• wherein the mobile terminal further comprises:
• a voltage supplier configured to generate a voltage to be applied to the touch panel,
• wherein the controller is further configured to:
• apply voltages having different phases to the touch panel, and
• detect the location of the stylus pen based on a phase of the electric signal received from the stylus pen,
• wherein the touch panel electrodes include a plurality of TX electrodes supplying an electric signal to the stylus pen, and a plurality of RX electrodes intersecting with the TX electrodes, and
• wherein the controller is further configured to:
• apply the voltages having the different phases to the plurality of TX electrodes in a preset manner, and
• detect TX electrodes adjacent to the point where the stylus pen is located based on the electric signal detected by a corresponding RX electrode,
• wherein the controller is further configured to:
• apply the voltages having the different phases to at least some of the plurality of TX electrodes, and
• not apply a voltage to TX electrodes, except for the at least some TX electrodes, of the plurality of TX electrodes,
• wherein the controller is further configured to:
• apply the voltages having the different phases to the plurality of TX electrodes at an interval of a specific number of electrodes,
• wherein the stylus pen receives an electric signal from one of the TX electrodes, to which the voltages having the different phases have been applied, and
• wherein the controller is further configured to select the one TX electrode based on a phase of a first electric signal when the first electric signal is received from the stylus pen.