TECHNOLOGY FOCUS - POLYMERS - Preferred Compound: Dicyclopentadiene-type epoxy resin has a structure of formula (1).R1-R3 = hydrogen, or linear or branched alkyl group; andn = degree of polymerization.Preferred Structure: The resin sheet comprises a structure chosen from structures (A-C). Structure (A) of the resin sheet comprises an epoxy resin layer in which the light-diffusing agent is unevenly distributed. Structure (B) comprises a laminate consisting of any one outermost layer as epoxy-resin layer in which the light-diffusing agent is unevenly distributed. The light-diffusing agent is unevenly distributed in the most external surface side of the epoxy-resin layer. Structure (C) of the resin sheet comprises a laminate containing an integrated structure of two epoxy resin layers (I,II) containing epoxy resin. The volume ratio of light-diffusing agent in the epoxy-resin layer (I) differs from the volume ratio of light-diffusing agent in the other epoxy-resin layer (II). The light-diffusing agent is unevenly distributed in the thickness direction of the laminate. The particle-dispersed resin sheet further contains hard-coat layer and gas barrier layer.Preferred Composition: The resin sheet contains 0.1-60 wt.% of light-diffusing agent w.r.t the epoxy resin. The epoxy resin contains 20-75 wt.% of dicyclopentadiene-type epoxy resin, and further contains cycloaliphatic epoxy resin.Preferred Properties: The light-diffusing agent is unevenly distributed in any one surface side of the resin sheet. The surface side of the resin sheet in which light-diffusing agent is unevenly distributed, is smooth. The maldistribution region of light-diffusing agent in the resin sheet is a region from one surface to 1/50-1/2 of whole thickness. The ratio of light-diffusing agent in the maldistribution region of light-diffusing agent is 0.1-80 wt.%. The light-diffusing agent has average particle diameter of 0.2-100 microns. The light-diffusing agent is uniformly dispersed in the epoxy resin layer. The difference of refractive index of the epoxy resin and refractive index of the light-diffusing agent is 0.03-0.3. The particle-dispersed resin sheet has glass transition temperature (Tg) of 170 degrees C or more, light transmittance of 88% or more, and fracture strength of more than 45 N.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Compounds: The light-diffusing agent is chosen from silica, alumina, titania, zirconia, tin oxide, indium oxide, cadmium oxide and antimony oxide. EXAMPLE - HP-7200L (TM) dicyclopentadiene-type epoxy resin (in weight parts) (26.6) of formula (1) (as above), 3,4-epoxy cyclohexyl methyl-3,4-epoxy cyclohexane carboxylate (26.6) of formula (2) as alicyclic epoxy resin, methyl hexahydrophthalic anhydride (45.8) of formula (3) as hardener, and tetra-n-butyl phosphonium o,o-diethyl phosphoro dithioate (1) of formula (4) as curing catalyst were mixed and stirred to prepare epoxy resin liquid. Alumina particle (0.8) having an average particle diameter of 5 micronsm, a refractive index of 1.77 and a specific gravity of 3.9 was mixed and stirred with epoxy resin liquid (100), and alumina-containing epoxy resin liquid (light-diffusing agent) was prepared. Urethane acrylate of formula (5) was suspended to toluene, and 17 wt.% of urethane acrylate solution was prepared. Subsequently, polyvinyl alcohol was suspended to water, and 5.5 wt.% of polyvinyl alcohol aqueous solution was prepared.    R, R1-R3 = hydrogen; and    n = 0.2.    The urethane acrylate solution was applied on surface of an endless belt, dried, cured, and a hard-coat layer with film thickness of 2 microns was formed. Polyvinyl alcohol aqueous solution was subsequently applied on the hard-coat layer, dried at 100 degrees C, and gas barrier layer with film thickness of 3.7 micronsm was formed. Alumina-containing epoxy resin liquid was coated on gas barrier layer, cured at 200 degrees C for 60 minutes, and epoxy resin layer with film thickness of 400 microns was formed to obtain a laminated structure. Alumina in the epoxy resin liquid started settling immediately after coating, and was unevenly distributed in the lower side of gas barrier layer. The laminated structure was peeled from the endless belt, left on a glass plate, cured, and a resin sheet having laminated structure consisting sequentially of hard-coat layer, gas barrier layer and epoxy resin layer was obtained. The resin sheet had glass transition temperature of 206 degrees C, light transmittance of 88 % and fracture strength of 90 N. The resin sheet was used as liquid crystal cell substrate for liquid crystal display device. The resin sheet had excellent color protecting ability according to JIS K-7103, and effectively restrained glare resulting from back light incorporating illumination light or display device.