BACKLIGHT DEVICE, DISPLAY DEVICE, AND OPTICAL MEMBER

摘要

A backlight device has a surface area light source, a microlens array sheet, and a lenticular lens sheet. The microlens array sheet has a flat surface facing the surface area light source and also has a microlens surface located on the opposite side of the flat surface and on which microlenses are formed. The lenticular lens sheet has a flat surface facing the microlens surface and also has a cylindrical lens surface located on the opposite side of the flat surface and on which cylindrical lenses are formed side by side. The backlight device has high front face brightness, and in the device, a brightness-angle distribution in the two-axis direction spreads to some extent.