McClure, Qualey & Rodack, LLP
Optical touch apparatus using a dynamic threshold for sensing a touch device and optical touch method
An optical touch apparatus and an optical touch method are disclosed. The optical touch apparatus comprises a touch panel, a first optical sensor, a second optical sensor and a processor. The first optical sensor senses a light pen to output a first sensing signal. The second optical sensor senses the light pen to output a second sensing signal. The processor decides a threshold value according to the second sensing signal, and determines whether the first sensing signal is greater than the threshold value. The processor determines that the light pen touches the touch panel if the first sensing signal is greater than the threshold value.
WISTRON CORPORATION
G G
G06F G06F
inventional inventional
Chia-Ta Kuo-Hsien Yu-Yen Ching-An
Hsieh Lu Chen Cho