GRID SIGNAL TRANSMITTER AND GRID SIGNAL RECEIVER AND WIRELESS POINTING SYSTEM HAVING THEM AND MOTION DETERMINING METHOD IN THE WIRELESS POINTING SYSTEM

摘要

PURPOSE: A grid signal transmitter and receiver, a wireless pointing system including the transmitter and receiver, and a movement discriminating method of the system are provided to decide a movement direction of the grid signal transmitter by deciding movement from a grid signal of the grid signal transmitter in the grid signal receiver. CONSTITUTION: A microcomputer(120) creates a return frequency signal in each axis. A Y-grid generator(165) receives a Y-axis return frequency signal. The Y- grid generator creates a Y-axis pattern. The second lens(185) transmits the Y-axis pattern. The second lens examines the Y-axis pattern in a grid signal receiver(200) around. The signal receiver(220) receives a grid signal of a grid signal transmitter(100). A motion vector processor(240) processes a motion vector from the grid signal.