| 摘要 |
An optical touch screen device includes a display screen, a number of infrared sensors, two infrared sources, and a processing unit. The display screen has N sides, wherein N represents an integer greater than two. The number of infrared sensors is N−1. The N−1 infrared sensors are arranged adjacent N−1 sides of the display screen, respectively. The two infrared light sources are arranged at the remaining side such that light emitted from each of the two infrared sources cover the entire display screen and reaches the infrared sensors. The N−1 infrared sensors are configured for detecting locations of the shadows of an input device formed thereon and generating signals associated with the locations of the shadows. The processing unit is electrically connected to the infrared sensors for processing the signals to calculate a location of an input device on the surface of the display screen.
|
