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    • 1. 发明授权
    • Operation device and image reading apparatus
    • 操作装置和图像读取装置
    • US08564848B2
    • 2013-10-22
    • US13074497
    • 2011-03-29
    • Noboru ShimoyamaHiroshi OgushiYasushi Ishida
    • Noboru ShimoyamaHiroshi OgushiYasushi Ishida
    • H04N1/40H04N1/04G06F3/045F21V7/04
    • H03K17/962H03K2217/96079H04N1/00411
    • On a bottom surface of a light guide element of an operation device including a panel with a light-transmissive portion, a reflection portion is formed in a first region thereof, which is close to a light source, and a first diffusion surface is formed in a second region of the bottom surface of the light guide element, which is a region distant from the light source. A light-incident side of the light guide element is a non-diffusion surface. Sides other than the light-incident side are second diffusion surfaces. Light that has been emitted from the light source and incident to the light guide element via the light-incident side is totally reflected and is then guided to the first and the second diffusion surfaces and a part of diffusion-reflected light illuminates the light-transmissive portion of the panel.
    • 在包括具有透光部分的面板的操作装置的导光元件的底面上,在靠近光源的第一区域中形成反射部分,并且形成第一扩散表面 所述导光元件的底面的第二区域是远离所述光源的区域。 光导元件的光入射侧是非扩散面。 光入射侧以外的侧面是第二扩散面。 从光源发射并通过光入射侧入射到导光元件的光被全反射,然后被引导到第一和第二扩散表面,并且一部分漫反射光照射透光 面板的一部分。