Abstract: An object tracking system and an object tracking method are provided. The object tracking system includes a transmitter, a receiver and at least one processing circuit. The transmitter is configured to transmit wireless signals through a target space. The receiver is configured to receive the wireless signals. The at least one processing circuit is configured to perform following processes: obtaining the wireless signals received by the receiver; generating motion information associated with at least one target object by executing a motion machine-learning model that processes the received wireless signals; and generating three-dimensional tracking information of the at least one target object with respect to the target space by fusing spatial information of the target space and the motion information.

Abstract: An LED matrix device has sequential circuits, data drive circuits, scanning drive circuits and the LED matrix. The display elements at the junction of lines and rows include an infrared LED and at least one visible light LED each. Sequential circuits generate control signals to control the data and the scanning drive circuits, driving infrared and visible light LEDs. The sequential circuits produce group signals covering the line and row information of currently driven infrared LEDs and provide to the external light pen device for encoding the current position of the light pen. The function of the visible light LED is the same as in conventional LED matrixes. The infrared LED produces the position information needed by the light pen. An LED display can be many LED matrix devices in series, so the interface of the light pen for the present invention also has the function of series connection.