METHOD FOR PRODUCING OPTICAL SHEET, OPTICAL SHEET, AND IMAGE DISPLAY DEVICE

摘要

Disclosed are a method for producing an optical sheet which has improved appearance, an optical sheet, and an image display device which comprises the optical sheet. Specifically disclosed is a method for producing an optical sheet that has a plurality of layers, at least one of said plurality of layers being an optical function sheet layer which has light-transmitting portions that are formed in parallel with each other along the surface of a base layer and capable of transmitting light therethrough, and light-absorbing portions that are arranged in parallel with each other between the light-transmitting portions and capable of absorbing light. The method for producing an optical sheet comprises a step of forming the light-transmitting portions on one surface of the base layer, and a step of forming the light-absorbing portions by filling the spaces between the light-transmitting portions with a binder that is composed of a resin, in which light-absorbing particles are dispersed, and curing the resin in the spaces. The step of forming the light-absorbing portions is carried out a plurality of times, and at least the final time has a lower concentration of the light-absorbing particles contained in the binder than the first time. Also specifically disclosed are an optical sheet produced by the method, and an image display device comprising the optical sheet.