带发光元件的光波导以及光学式触摸面板

Optical waveguide with light emitting device and optical touch panel

Abstract

Provided is an optical waveguide with a light emitting device and an optical touch panel. The present optical waveguide (60) with a light emitting device has the problems that the width (W3) is wider and the emitted light is poor. In an optical waveguide (10) with a light emitting device to be used in the present invention, branched points (16) are sequentially provided in a guiding light direction (17) of a main path (14) and the width of the main path (14) becomes narrower as the main path (14) moves away from a light emitting device (11). The optical waveguide (10) having this structure can reduce a width W1 because there are no portions that correspond spaces (cladding layers) among adjacent branched paths (15). Moreover, the optical waveguide (10) has an excellent optical transmission efficiency, resulting in high intensity of light emitted. Uniformity of the light emitted is equal or more than a conventional optical waveguide (60) with a light emitting device.
提供一种带发光元件的光波导以及光学式触摸面板。以往的带发光元件的光波导(60)存在宽度(W3)较宽并且射出的光线的强度较弱这种问题点。使用于本发明的带发光元件的光波导(10)在沿着主路(14)的导光方向(17)上依次设置有分支点(16),主路(14)随着远离发光元件(11)而宽度变窄。该结构的带发光元件的光波导(10)在相邻的分支路(15)之间没有空间(包层),因此能够使宽度(W1)变窄。另外,由于分支路(15)较短,因此光传输效率良好并且射出的光的强度较强。射出的光的均匀性在以往的带发光元件的光波导(60)同等以上。

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