McClure, Qualey & Rodack, LLP
Light guide bar and optical touch panel having the same
A light guide bar and an optical touch panel utilizing the light guide bar are provided. The light guide bar is applied to an optical touch panel with a sensing area. The light guide bar includes a bar body and a plurality of prisms. The bar body has a first receiving end, a light-exiting surface, and a structure surface. The light-exiting surface is opposite to the structure surface and faces the sensing area while the first receiving end is connected between an end of the light-exiting surface and an end of the structure surface. The prisms are formed on the structure surface. Each prism includes a first surface and a second surface respectively having a first angle and a second angle with respect to the structure surface, wherein the second surface is closer to the first receiving end than the first surface, and the second angle is larger than or equal to the first angle. The prisms are utilized to alter the angle of the light exiting the bar body to improve the touch-sensing effect of the optical touch panel utilizing the light guide bar.
Briview Corporation
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G02B G06F G02B G02B G02B
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Huang-Jen
Chen