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CN103809235A 导光板、面光源装置、液晶显示装置及移动设备 有权 转让

导光板、面光源装置、液晶显示装置及移动设备
摘要：
一种导光板、面光源装置、液晶显示装置以及移动设备，减少从指向性变换图案的照明区域侧端面漏出的光，从而扩大有效照明区域。导光板（33）具备将从端面射入的光封入的光导入部（35）和厚度比光导入部小且使入射的光从照明区域（46）向外部射出的导光板主体（34）。光导入部在光射出侧的面和其相反面中的至少一面具有从厚度比所述导光板主体大的部分的表面向导光板主体的一端倾斜的倾斜面（37）。导光板主体在光射出侧的面和其相反面中的至少一面，在位于光导入部与照明区域之间的区域具有用于变换从光导入部通过照明区域的光的指向方向的指向性变换图案（40）。指向性变换图案的谷线的至少一部分位于比照明区域的表面更靠导光板主体的内部侧。
摘要（英）：

A light guide plate has an end surface configured to have light incident thereon, a light introduction part that confines light incident through the end surface, and a light guide plate body disposed to be continuously joined to the light introduction part. The light guide plate body has a thickness smaller than a maximum thickness of the light introduction part. The light guide plate body outputs the incident light to an outside from a lighting region through a light exit part. The light introduction part includes an inclined surface in at least one of a light-exit-side surface and an opposite surface of the light-exit-side surface. The directivity change pattern changes directivity of the light passing to the lighting region from the light introduction part.

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