Method for determining pointing location by a remote controller using ultrasonic wave

The present invention relates to a method of accurately detecting by using an ultrasonic pointing point of the remote control is pointed on the television. In particular, the present invention is the remote control from inside the calculation a geometric location on the plurality of installed transmission and reception path of the ultrasonic signals between the television and remote from the sensing time difference of the ultrasonic signal between these remote control and the three-dimensional pointer is again remote position sensor combining the geometric location and the direction obtained by the direction of the samples to provide a technique that the remote control is accurately calculate the pointing point represents; According to the invention, not the point at which the user is pointing using the remote control for the television only can do exactly calculated by using the ultrasonic wave, it is possible to accurately analyze the geometric relationship of the 3-dimensional between the TV screen and the remote control number of applications ( for example, has the advantage of 3D games, it can be applied to three-dimensional virtual reality).