Method of controlling computer using display screen

摘要

A display device includes a matrix of pixel elements and a matrix of photo-detecting elements. The display device also includes an interface port accessible from the outside of the display device and configured to output a representation of a position of an invisible light spot on the display screen generated from an invisible light beam projected thereon with a spreading angle less than 20 degrees. The position of the invisible light spot is determined based on measurement from the photodetectors in the matrix of photo-detecting elements.

主权项

1. A method comprising:
measuring with a two-dimensional matrix of photo-detecting elements constructed on a substrate having thereon a matrix of pixel elements of a television screen a position of an invisible light spot on the television screen projected thereon from an invisible light beam with a spreading angle less than 20 degrees generated by a light source on a television remote control, the two-dimensional matrix of photo-detecting elements being arranged in a plurality of rows and a plurality of columns; and transmitting from the television to a computer a representation of the position of the invisible light spot on the television screen through an interface port accessible from the outside of the television.