| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a change in chromaticity of output light emitted from a luminous body containing a light diffusing agent and emitting light in a light guiding manner by controlling the particle size distribution of the light diffusing agent. <P>SOLUTION: A luminous body has a light guide plate base containing diffusing particles having a particle size distribution of center particles sizes b<SB>0</SB>(b<SB>0</SB>>0) set out of such a range where the ratio ηB(b<SB>0</SB>)/ηR(b<SB>0</SB>) of a blue scattering efficiency to a red scattering efficiency, which corresponds to a phase delay amount ϕ (rad) of the diffusing particles is 0.75 or greater and 1.25 or less. The base has the diffusing particles dispersed in such a way that the red-green-blue ratios μB/μR, μR/μG of the effective diffusion coefficient per a unit travel distance taking the number-of-layers distribution of the particle sizes of the diffusing particles into account becomes 0.9 or greater and 1.1 or less. <P>COPYRIGHT: (C)2011,JPO&INPIT |
