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    • 44. 发明申请
    • OPTICAL WAVEGUIDE FOR TOUCH PANEL
    • 用于触摸面板的光学波形
    • US20120045170A1
    • 2012-02-23
    • US13207926
    • 2011-08-11
    • Naoki ShibataToshiki Naito
    • Naoki ShibataToshiki Naito
    • G02B6/32
    • G06F3/0421G02B6/1245G02B6/138G02B6/30G02B2006/12102
    • An optical waveguide for a touch panel is capable of causing light beams emitted from a light-emitting optical waveguide section to enter a light-receiving optical waveguide section even when warpage or distortion occurs. Edges of an over cladding layer covering an end surface of a core for emitting a light beams and an end surface of a core for receiving the light beams respectively are configured in the form of light-emitting and light-receiving lens portions each having an outwardly-bulging arcuately curved surface as seen in vertical sectional view. The light-emitting lens portion has one of the following configurations: a configuration in which a light beam emitted from the light-emitting lens portion is adapted to diffuse in the direction of the height of the light-emitting lens portion; and a configuration in which the height of the light-emitting lens portion is less than that of the light-receiving lens portion.
    • 即使发生翘曲或变形,用于触摸面板的光波导能够使从发光光波导部分发射的光束进入光接收光波导部分。 覆盖用于发射光束的芯的端面的上覆层的边缘和用于接收光束的芯的端面分别被配置为发光和光接收透镜部分的形式,每个透镜部分具有向外 如垂直剖视图所示,呈弧形弧形曲面。 发光透镜部分具有以下配置之一:从发光透镜部分发射的光束适于在发光透镜部分的高度方向上扩散的配置; 以及发光透镜部的高度小于受光透镜部的高度的结构。