| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a self-light-emitting device capable of obtaining a high perceptivity from all directions when viewed from the slanting upper part. <P>SOLUTION: Since the optical axis L of a light source 1 is in nearly perpendicular to a cover material 4, it is viewed in nearly uniformly from all directions. Furthermore, the angle of field of the light source 1 of light-emitting diode is made 80-160°, the light from the light source 1 is perceived from all directions when viewed from the slanting upper part, thereby the high perceptivity can be obtained from all directions. <P>COPYRIGHT: (C)2008,JPO&INPIT |
