| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light guide body with improved concealment properties of its optical deflection elements and capable of alleviating luminance unevenness. <P>SOLUTION: On a first main face of the light guide body, unit shapes of a plurality of optical deflection elements for deflecting light inside the light guide body toward a second main face are formed, and micro unevenness parts finer than a size of the unit shape of the optical deflection element are provided on the surface of each unit shape of the optical deflection element, whereby, concealment properties are improved to have the optical deflection elements hardly recognized, and that, scattering properties are improved to lessen deviation of luminance distribution derived from faint height errors of the unit shape and alleviate luminance unevenness. <P>COPYRIGHT: (C)2013,JPO&INPIT |
