| 摘要 |
PCT No. PCT/JP94/01849 Sec. 371 Date Jun. 4, 1996 Sec. 102(e) Date Jun. 4, 1996 PCT Filed Nov. 2, 1994 PCT Pub. No. WO95/12827 PCT Pub. Date May 11, 1995A surface light source device having a light conducting member made of a transparent material, a light source disposed on the light incident edge surface of the light conducting member, a light diffusing member disposed on a front surface (light emitting surface) side of the light conducting member, a reflecting member provided on a rear surface side of the light conducting member, a prismatic sheet having a multiplicity of fine prismatic surfaces arranged on the light diffusing member; a pattern having a light diffusing characteristic is provided on the surface of the light conducting member; and the pattern is formed with the aid of half-transparent ink in which fine spherical silicon grains each having a particle diameter of 1 to 10 micrometers are mixed. According to the present invention, therefore a bright surface light source device having a uniform brightness distribution can be obtained.
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