Hong Kong Applied Science and Technology Research Institute Company, Limited

Chenjung Tsai

Xiuling Zhu

Xurong Li

A coordinate locating apparatus for locating at least one touch point on a plane and the method thereof are provided. The coordinate locating apparatus comprises: a first detecting unit, comprising a first light emitting element and a first light receiving element, arranged at a first location of the plane; a second detecting unit, comprising a second light emitting element and a second light receiving element, arranged at a second location of the plane; a first optical element arranged along an edge of the plane for reflecting and retro-reflecting light from the first and the second light emitting elements; and a second and third optical elements arranged along two edges of the plane for performing at least one of reflecting and retro-reflecting light from the first and the second light emitting elements or light reflected from the first optical element, both of the two edges being adjacent to the edge along which the first optical element is arranged, wherein the at least one touch point is located on the basis of the detected intensities of light received by the first and the second light receiving elements, and the detected intensities of light are compared with a first threshold and a second threshold.

Coordinate locating method and apparatus

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.

Growing community of inventors

Hong Kong, China

Chenjung Tsai