Patent ID: 9223160
Filing Date: 2015-12-29
Classification: G02F

Abstract:
1. A display, comprising: a display panel configured to display an image; an illumination unit configured to illuminate the display panel; and a driving unit configured to drive the display panel and the illumination unit, the illumination unit including a pair of light transmissive substrates separated away from each other and disposed to oppose each other, two light sources including a first light source disposed on a side face on a front right side of one of the pair of light transmissive substrates, and a second light source disposed on a side face on a front left side of the one of the pair of light transmissive substrates, an optical modulation layer provided in space between the pair of light transmissive substrates, and configured to exhibit diffusion or transparency for light from each of the two light sources according to a magnitude of an electric field, and an electrode configured to generate the electric field in the optical modulation layer upon application of a voltage, wherein the optical modulation layer is configured to switch a wide-angle diffusion intensity and a front diffusion intensity of light emitted from the illumination unit, by switching of a magnitude of the voltage applied to the electrode, wherein the driving unit is configured to allow a diffusion intensity ratio of the light emitted from the illumination unit in a dual-view mode to be higher than the diffusion intensity ratio in a normal mode by switching the magnitude of the voltage applied to the electrode, the dual-view mode being a mode in which respective two-dimensional images different from each other for a perspective on a front right side and a perspective on a front left side are displayed, and the normal mode being a mode in which a common two-dimensional image for any perspectives including a perspective in a front direction is displayed, and the diffusion intensity ratio is defined as dividing the wide-angle diffusion intensity by the front diffusion intensity, wherein the display panel includes a plurality of pixels arranged two-dimensionally, the plurality of pixels include a plurality of first pixels and a plurality of second pixels, the plurality of first pixels being configured to display the two-dimensional image for the perspective on the front right side, and the plurality of second pixels being configured to display the two-dimensional image for the perspective on the front left side, the plurality of first pixels and the plurality of second pixels are disposed alternately in a direction in which the two light sources are opposed, the electrode includes a plurality of partial electrodes that extend in a direction intersecting the opposing direction of the two light sources, and a plurality of specific partial electrodes among the plurality of partial electrodes are each disposed at a position that opposes a border between one of the first pixels and one of the second pixels, and wherein the optical modulation layer is configured to form diffusion regions by application of a voltage to the partial electrodes, the diffusion regions each have a shape of a strip and extending in a direction parallel to the partial electrodes, the optical modulation layer is configured to allow a diffusion intensity of light, which goes out from one of the diffusion regions upon entrance of the light from the light source disposed on the side face on the front right side into that one of the diffusion regions, to have a peak in a direction of one of the second pixels facing another diffusion region next to that one of the diffusion regions on the front left side, or in a direction having an angle larger than the direction of one of the second pixels, and the optical modulation layer is configured to allow a diffusion intensity of light, which goes out from one of the diffusion regions upon entrance of the light from the light source disposed on the side face on the front left side into that one of the diffusion regions, to have a peak in a direction of one of the first pixels facing another diffusion region next to that one of the diffusion regions on the front right side, or in a direction having an angle larger than the direction of one of the first pixels.