Hong Kong Applied Science and Technology Research Institute Company, Limited

Xurong Li

Xiuling Zhu

Chenjung Tsai

Lichun Ye

The present invention is to provide a method and system for determining true touch points on input touch panel. Two optical sensing module pairs are used to determine two groups of possible touch regions, further with overlap checking with virtual shadow regions to find out potential touch points. Occlusion checking is implemented to acquire true touch points from the potential touch points. The method of the present invention is capable of acquiring true touch points in a fast and reliable way. Furthermore, an interactive input system of the present invention comprises optical sensing modules having their corresponding optical emitters with different wavelengths, and light filters with peak transmission at different wavelengths to avoid from interference effect and over-exposed signal during signal detection by the optical sensing modules.

Method and system for determining true touch points on input touch panel using sensing modules

A touch panel capable of recognizing at least one gesture and the method thereof are provided. The touch panel comprises: a first optical unit, comprising a first light emitting element and a first light receiving element, arranged at a first position of the touch panel; a first optical element arranged along a first edge of the touch panel for reflecting light; a second and a third optical element arranged along a second and a third edge of the touch panel, respectively, for retro-reflecting the light, the second edge being adjacent to both the third edge and the first edge; and a processing unit for recognizing the at least one gesture according to changes to distance and slope of possible touch points.

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Hong Kong, China

Xurong Li