| abstract |
Disclosed are polyamide microparticles, a manufacturing method therefor, an optical film using said polyamide microparticles, and a liquid-crystal display device, whereby polarized light can be efficiently converted to unpolarized light that is close to natural light, without an accompanying change in color, and light from a light source can be evenly diffused. The disclosed polyamide microparticles are characterized by comprising a spherocrystal structure and exhibiting a crystallite size of at least 12 nm, as measured by wide-angle X-ray diffraction, and a crystallinity of at least 50%, as measured by DSC. The disclosed optical film is characterized by having a resin layer that contains the aforementioned polyamide microparticles. The disclosed liquid-crystal display device is provided with a light-source device, a rear polarizer, liquid-crystal cells, and a front polarizer, and is characterized by having the aforementioned optical film between the light-source device and either the front surface of the front polarizer or the rear surface of the rear polarizer. |