Patent ID: 8896574
Filing Date: 2014-11-25
Classification: G06F

Abstract:
1. An optical touch apparatus, comprising: at least one optical path unit, located at a first side of a display unit of the optical touch apparatus, for receiving at least one directional incident light, the at least one directional incident light being focused to form an image in an imaging region through at least one refraction in the at least one optical path unit; and at least one light sensing unit, located at a position relative to the at least one optical path unit, for generating a sensing result according to the image in the imaging region; wherein the imaging region formed by the at least one optical path unit is larger than the at least one light sensing unit thereby increasing the acceptable error of the placement of the at least one light sensing unit during fabrication; wherein the at least one optical path unit is composed of a plurality of lenses; wherein the plurality of lenses has the same shape; wherein the plurality of lenses has different sizes combined in different directions; and wherein a first surface of the at least one optical path unit comprises two curvatures.