Optical touch apparatus
AssigneeRaydium Semiconductor Corporation
InventorsLong Hsu, Meng-Shin Yen, William Wang, Chung-Cheng Chou
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Abstract
The invention provides an optical touch apparatus. The optical touch apparatus includes at least one optical path unit and at least one light sensing unit. The at least one optical path unit is located on a first side of a display unit of the optical touch apparatus and used to receive at least one directional incident light, the at least one directional incident light is focused to form an image in an imaging region through at least one refraction in the at least one optical path unit. The at least one light sensing unit is located at a relative position of the at least one optical path unit, and used to generate a sensing result according to the image in the imaging region.
Claims12
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.
Dependencies are inferred from the claim text.