Lighting unit, display, and three-dimensional display

摘要

In a scan system, a lighting unit, a display, and a three-dimensional display that have all of high luminance, low power consumption, and high reliability of a circuit board are provided. A light modulation device bonded to a light guide plate is provided with a light modulation layer exhibiting scattering property or transparency to light propagating through the light guide plate. The light modulation layer is interposed between a lower electrode that is configured of a plurality of partial electrodes extending in a direction parallel to a light incident surface and a sheet-like upper electrode. A drive circuit sequentially drives the plurality of partial electrodes to scan a region exhibiting the scattering property of the light modulation layer in a direction orthogonal to the light incident surface.

主权项

1. A display comprising:
a lighting unit outputting illumination light; a display panel modulating the illumination light to output a picture; and a drive circuit driving the lighting unit and the display panel, wherein the lighting unit includes
a light guide plate,a light source disposed on a side surface of the light guide plate, anda light modulation device disposed on a surface or in an inside of the light guide plate and bonded to the light guide plate, the light modulation device includes
a pair of transparent substrates disposed opposite to each other with a distance in between,a pair of electrodes disposed on respective surfaces of the pair of transparent substrates, anda light modulation layer provided in a gap between the pair of transparent substrates, one or both of the pair of electrodes have a plurality of partial electrodes arranged in a direction orthogonal to a light incident surface of side surfaces of the light guide plate, the light incident surface receiving light from the light source, the light modulation layer totally or partially exhibits scattering property or transparency to the light from the light source depending on a magnitude of an electric field generated by the electrodes, and the drive circuit sequentially drives the plurality of partial electrodes on a predetermined unit basis such that a region exhibiting the scattering property of the light modulation layer is sequentially transferred from unit to unit in the direction orthogonal to the light incident surface while the remaining units exhibit transparency, wherein the drive circuit adjusts a light amount of the light source depending on a distance of the partial electrode to be driven of the plurality of partial electrodes from the light source.