Illumination device including a light modulation layer, and a display unit including the illumination device

摘要

A display unit is provided including: a display panel having a plurality of pixels two-dimensionally arranged; a first polarization plate and a second polarization plate that face each other with the display panel in between; and an illumination device configured to illuminate the display panel through the first polarization plate. The illumination device includes a light modulation layer provided in a clearance between first and second transparent substrates, the light modulation layer being configured to exhibit scattering property or transparency of the light from the light source depending on a magnitude of an electric field. The light modulation layer includes a first portion having optical anisotropy, and relatively high responsiveness to the electric field, and a second portion having optical anisotropy, and relatively low responsiveness to the electric field. The light modulation layer generates polarized light when the light modulation layer exhibits the scattering property, the polarized light having a polarization component mainly in a first direction that is parallel to a transmission axis of the first polarization plate.

主权项

1. A display unit comprising:
a display panel having a plurality of pixels two-dimensionally arranged; a first polarization plate and a second polarization plate that face each other with the display panel in between; and an illumination device configured to illuminate the display panel through the first polarization plate, the illumination device including
a first transparent substrate and a second transparent substrate that are arranged to face each other with a distance therebetween,a light source configured to apply light to an end surface of the illumination device, anda light modulation layer provided in a clearance between the first transparent substrate and the second transparent substrate, the light modulation layer being configured to exhibit scattering property or transparency of the light from the light source depending on a magnitude of an electric field, wherein the light modulation layer includes a first portion and a second portion, the first portion having optical anisotropy, and relatively high responsiveness to the electric field, and the second portion having optical anisotropy, and relatively low responsiveness to the electric field, and wherein the light modulation layer generates polarized light when the light modulation layer exhibits the scattering property, the polarized light having a polarization component mainly in a first direction that is parallel to a transmission axis of the first polarization plate.