Patent ID: 9207813
Filing Date: 2015-12-08
Classification: G06F

Abstract:
1. A electronic pen comprising: a stylus body including a writing tip; a first ultrasonic transmitter; a second ultrasonic transmitter; an electromagnetic transmitter; and a controller coupled to the first ultrasonic transmitter, the second ultrasonic transmitter, and the electromagnetic transmitter, the controller configured for controlling transmission of signals to a base unit from the first ultrasonic transmitter, the second ultrasonic transmitter, and the electromagnetic transmitter, where the electromagnetic transmitter is configured for transmitting a first electromagnetic signal of the signals that indicates a substantially simultaneous transmission by the first ultrasonic transmitter of a corresponding first ultrasonic signal of the signals, and where the electromagnetic transmitter is configured for transmitting a second electromagnetic signal of the signals that indicates a substantially simultaneous transmission by the second ultrasonic transmitter of a corresponding second ultrasonic signal of the signals, and where the first ultrasonic transmitter or the second ultrasonic transmitter is configured for transmitting an ultrasonic signal that comprises an identification number of the electronic pen, and where the base unit is separate from the electronic pen.