| 摘要 |
There are provided a light diffusing sheet and a nonglare sheet, which have good diffusion efficiency, can provide bright and high-contrast images and can reproduce high-quality images with reduced unnecessary scattered light and free from image haze and blur. The light diffusing sheet and the nonglare sheet comprise a light diffusing agent which, in use, is dispersed in a transparent base material. The light diffusing agent comprises core particles and a skin layer covering the surface of the core particles and satisfies requirements (i) and (ii): requirement (i): N1<N2<N3 or N3<N2<N1 wherein N1 represents the refractive index of the transparent base material, N2 represents the refractive index of the skin layer, and N3 represents the refractive index of the core particles; and requirement (ii): <math-cwu id="MATH-US-00001"> <NUMBER>1</NUMBER> <MATH> <MROW> <MI>T</MI> <MO>=</MO> <MROW> <MSQRT> <MROW> <MSUP> <MI>R</MI> <MN>2</MN> </MSUP> <MO>+</MO> <MSUP> <MROW> <MO>(</MO> <MROW> <MFRAC> <MROW> <MROW> <MN>2</MN> <MO>⁢</MO> <MI>n</MI> </MROW> <MO>+</MO> <MN>1</MN> </MROW> <MN>4</MN> </MFRAC> <MO>⁢</MO> <MI>psi</MI> </MROW> <MO>)</MO> </MROW> <MN>2</MN> </MSUP> <MO>+</MO> <MROW> <MFRAC> <MSQRT> <MN>2</MN> </MSQRT> <MN>4</MN> </MFRAC> <MO>⁢</MO> <MROW> <MO>(</MO> <MROW> <MROW> <MN>2</MN> <MO>⁢</MO> <MI>n</MI> </MROW> <MO>+</MO> <MN>1</MN> </MROW> <MO>)</MO> </MROW> </MROW> </MROW> </MSQRT> <MO>-</MO> <MI>R</MI> </MROW> </MROW> </MATH> <mathematica-file id="MATHEMATICA-00001" file="US20040263965A1-20041230-M00001.NB"/> <image id="EMI-M00001" wi="216.027" he="23.04855" file="US20040263965A1-20041230-M00001.TIF" imf="TIFF" ti="MF"/> </MATH-CWU> wherein R represents the average radius of core particles in mum, T represents the thickness of the skin layer in mum, n is an integer of not less than 0 (zero), and psi is 0.4 to 0.7 mum.
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