LIGHT DIFFUSER AND PROCESS FOR PRODUCTION OF LIGHT DIFFUSER

摘要

The invention aims to provide a light diffuser which can diffuse light selectively in a desired direction and can suppress uneven luminance and lamp images stably with high reproducibility even when the number of cold-cathode tubes constituting a backlight is reduced to result in a larger space between cold-cathode tubes, a process for production of the light diffuser, and a backlight unit having such characteristics. A light diffuser, characterized in that the light diffuser has a light diffusion layer comprising a thermoplastic resin and crosslinked organic fine particles dispersed in the resin, that the refractive index of the crosslinked organic fine particles is different from that of the thermoplastic resin, that the polymer constituting the crosslinked organic fine particles has a crosslink density defined by the formula (1) which falls within a prescribed range, that the aspect ratios of the crosslinked organic fine particles are above one, that the diffuser has a cylindrical lens array on at least one side, and that the major-axis directions of the crosslinked organic fine particles and the lengthwise directions of the cylindrical lenses are the same.