| 摘要 |
<P>PROBLEM TO BE SOLVED: To heighten actual brightness distribution in the vicinity of the central part of a light guide body and emit light having high brightness and eliminating color shading or uneven brightness. <P>SOLUTION: An almost columnar recessed incident part 7 is installed at least one line in parallel to a side part 3 in a back part 6, the distance to the facing side part is made equal, the distance between the lines of the incident parts 7 is made equal, or the lines of the incident part 7 near to the side part 3 are made so as to have wider distance. A light deflection element 10 conducting total reflection or refraction so that brightness becomes maximum in the vicinity of the side part 3 is installed on surface part 5 or the back part 6 to obtain brightness in the whole of the light guide body 2. A prism shape is installed on the recessed inside of the incident part or an optional ratio of fine scattering elements are dispersed inside the light guide body 2 to uniformly diffuse light from the incident part 7 inside the light guide body 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
