Abstract:
An input coupler includes: a plurality of semi-reflectors located along an optical path along which a light incident from a light source travels, each of the plurality of semi-reflectors comprising a reflective surface that is inclined with respect to the optical path and configured to reflect a first portion of the light and transmit a second portion of the light; and a plurality of optical path changing members configured to change an optical path of the light transmitted through the plurality of semi-reflectors, wherein the plurality of semi-reflectors and the plurality of optical path changing members are arranged such that the light passing through at least one of the plurality of semi-reflectors and emitted in one direction has a linear beam distribution.
Abstract:
A directional backlight unit and an image display apparatus including the directional backlight unit are provided. The directional backlight unit includes at least one light source and a light guide plate that guides light emitted by the light source. An interval between grating patterns formed on the light guide plate satisfies at least one condition of a first range and a second range in order to minimize a spreading of light caused by the grating patterns.
Abstract:
A three-dimensional (3D) image display apparatus includes a directional backlight unit and a display panel. The 3D image display apparatus may include an absorptive wire grid polarizer in the directional backlight unit or the display panel, for minimizing a distance between a diffraction device of the directional backlight unit and a pixel of the display panel.
Abstract:
Provided are a lighting system, a backlight unit and a 3D image display apparatus including the backlight unit. The backlight unit includes: a lighting system configured to selectively output collimated light and diverging light, a diffraction device, and a light guide plate configured to guide the collimated light and the diverging light from the lighting system to the diffraction device. An exit direction of the collimated light from the diffraction device depends on at least one of an angle of incidence of the collimated light and the wavelength of the collimated light.
Abstract:
A backlight unit for a three-dimensional (3D) image display includes a light guiding plate configured to guide light; a light source configured to emit the light to the light guiding plate; and a diffraction grating structure provided on a surface of the light guiding plate, the diffraction grating structure configured to diffract the light emitted from the surface of the light guiding plate, and including diffracting gratings having different heights.
Abstract:
A light-field display device includes a screen, a grating pixel array, and an image generator. The image generator outputs light including three-dimensional (3D) image information. The grating pixel array is configured to diffract the light including the 3D image information in multiple directions, thereby forming a 3D image. The image generator outputs the light having the 3D image information to the screen at a predetermined angle.
Abstract:
A double-sided glassless three-dimensional (3D) display apparatus including a backlight unit may include an light source unit configured to emit light to the front and the rear thereof by diffracting incident light, and first and second display devices configured to use the light emitted by the light source unit as light for a 3D image formation and to form the 3D image on both sides of the light source unit. The light source unit may include a light source portion configured to emit three lights that have three different respective wavelengths and a light guide panel configured to transmit the lights emitted by the light source portion to the first and second display devices.
Abstract:
A directional backlight unit, a three-dimensional (3D) image display apparatus, and a 3D image displaying method are provided. The directional backlight unit includes a light guide plate having an emission surface on which a plurality of grating elements including first and second groups of grating elements are provided. The plurality of grating elements are arranged such that light beams emitted from the first and second groups of grating elements commonly propagate through a plurality of pixel points and respectively form first and second groups of view points of which corresponding regions do not overlap with each other.
Abstract:
A pattern structure includes a plurality of pattern structure units arranged on a same plane, where each of the plurality of pattern structure units includes a plurality of microstructures defined on a surface thereof and having a width of less than about 1 micrometer (μm); and a connection layer disposed between the plurality of pattern structure units and having a width of less than about 10 μm, where the connection layer connects the plurality of pattern structure units to each other.
Abstract:
In an example embodiment, a textile-based energy generator includes first and second electrode substrates, each of the first and second electrode substrates including a textile structure and an energy generation layer between the first and second electrode substrates, the energy generation layer on at least one of the first and second electrode substrates, the energy generation layer configured to generate electrical energy by at least one of generating friction between different materials and contacting and separating the different materials.