| 摘要 |
PCT No. PCT/JP96/00561 Sec. 371 Date Nov. 4, 1996 Sec. 102(e) Date Nov. 4, 1996 PCT Filed Mar. 7, 1996 PCT Pub. No. WO96/27817 PCT Pub. Date Sep. 12, 1996Provided are a surface light source device whose bright surface is excellent in whiteness and softness and a liquid crystal display that ensures a high visual quality. A relatively thick side end surface of a light scattering guide 1, which has a wedge-shaped profile, forms an incidence surface 2. A fluorescent lamp L is located in the vicinity of the incidence surface 2, and a silver foil R is arranged around it. A prism sheet 4 is located outside an exit surface 5. The orientation of the prism sheet 4 is selected so that the running direction of prismatic rows is in line with the transverse direction of the light scattering guide 1. The prismatic surface may be directed inward or outward. A prism sheet 8 is interposed between a back surface 6 of the light scattering guide 1 and a reflector (silver foil) 3. The prism sheet 8 is arranged so that its prismatic surface is directed inward. The orientation of prismatic rows formed on the prismatic surface is selected so that the running direction of the prismatic rows is in line with the vertical direction of the light scattering guide 1.
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