| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in which a conventional planar lighting apparatus used for a transmissive liquid crystal display with a large display area is difficult to obtain a uniform light distribution characteristic and liable to increased electric power consumption. SOLUTION: A planar lighting apparatus is equipped with a light guiding block 11 including: a light incident end face 15; a light emitting end face 16 situated opposite to the light incident end face 15 and provided with an area larger than the light incident end face 15; four side end faces 17, 18 which are situated between the light incident end face 15 and the light emitting end face 16 and which include a pair of slopes; and a plurality of prism bodies which are projectingly formed on the pair of slopes and which contain an apex extending in parallel to the light emitting end face 16. The apparatus is also equipped with a linear fluorescent lamp 14 which opposes the light incident end face 15 of this light guiding block 11 and which extends in parallel to the apex of the prism bodies, and equipped with a reflector 27 which surrounds this fluorescent lamp 14 and the light incident end face 15. A distance from the light emitting end face 16 of the light guiding block 11 to the fluorescent lamp 14 is set larger than the thickness of the light guiding block 11 along the direction perpendicular to the light emitting end face 16. COPYRIGHT: (C)2007,JPO&INPIT
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