METHOD FOR DETECTING POINT INDICATED BY REMOTE CONTROLLER USING ULTRASONIC WAVE

摘要

The present invention pertains to a method for precisely detecting a point indicated by a remote controller on a television screen by using ultrasonic waves. Particularly, the present invention provides a technique, wherein a plurality of transmitting and receiving paths for ultrasonic signals are provided between a television and a remote controller, a three-dimensional geometric position of the remote controller and a pointer is calculated from the difference of time that ultrasonic wave signals are sensed therebetween, and then the direction indicated by the remote controller is obtained from an angular position sensing sensor in the remote controller so as to combine the geometric position and the indicated direction, thereby precisely calculating the point which is indicated by the remote controller. According to the present invention, a point which is indicated by a user by means of a remote controller with respect to a television screen may be precisely calculated using ultrasonic waves, and a three-dimensional geometric relationship between the television screen and the remote controller may be precisely analyzed. Therefore, the present invention may be employed in various application fields (for example: three-dimensional games and three-dimensional virtual reality).