Patent ID: 8451235
Filing Date: 2013-05-28
Classification: G06F

Abstract:
1. An optical touch panel, comprising: a rectangular position-detecting surface with a specified length and a specified width; a plurality of light-emitting element pairs configured for emitting a plurality of light beams, wherein: a plurality of light-receiving element pairs configured for receiving the plurality of light beams emitted by the plurality of light-emitting element pairs, wherein: a first reflector arranged along a first side of the position-detecting surface in a widthwise direction, wherein the first reflector is configured for reflecting a light beam emitted by one of the first light-emitting elements to one of the first light-receiving elements; a second reflector arranged along a second side of the position-detecting surface in the widthwise direction, wherein the second reflector is configured for reflecting a light beam emitted by one of the second light-emitting elements to one of the second light-receiving elements; and a control circuit configured for causing the plurality of light-emitting element pairs to emit the plurality of light beams in a predetermined order to scan the position-detecting surface, and further configured for causing the plurality of light-receiving element pairs to receive the plurality of light beams, thereby forming optical paths on the position-detecting surface in a grid pattern; wherein the angle θ is greater than 0 degrees and less than 180 degrees, wherein the optical touch panel is adapted for detecting an object positioned on the position-detecting surface, and wherein at least a portion of the plurality of light beams are blocked by the object when the object is positioned on the position-detecting surface, thereby hindering the portion of the plurality of light beams from reaching at least one of the first or second light-receiving elements of at least one of the plurality of light-receiving element pairs.