Abstract:
A display apparatus includes a plurality of light sources which emit light beams, a plurality of optical waveguides which guide the light beams, a plurality of scanning lines which are arranged so as to intersect with the optical waveguides, a plurality of light output elements which, at intersections of the optical waveguides and the scanning lines, output the light beams guided in the optical waveguides by electric signals from the scanning lines, and a scanning line driving unit which drives the scanning lines in a direction opposite to a direction in which the light beams are guided.
Abstract:
According to one embodiment, a display device includes a display unit, an imaging element, and a first reflecting unit. The display unit emits a light. The imaging element has a major surface and is configured to form a real image of an object at a symmetric position of the object with the major surface serving as a plane of symmetry. The imaging element includes a portion not overlapping the display unit as viewed along a normal direction of the major surface. The first reflecting unit includes a portion facing the major surface, and is configured to reflect the light emitted from the display unit and to cause the light to be incident on the portion of the imaging element not overlapping the display unit.
Abstract:
According to one embodiment, a display device includes a light source, a light guide, a light extraction unit, and a drive circuit. The light guide is configured to guide light emitted by the light source from one end side of the light guide toward one other end side of the light guide. The light extraction unit is provided on a surface of the light guide, and includes a liquid crystal dispersion layer, a first electrode, and a second electrode. The liquid crystal dispersion layer includes liquid crystal droplets, and the first and second electrodes are configured to cause an electric field to occur in the liquid crystal dispersion layer. The drive circuit is configured to apply a voltage between the electrodes. Liquid crystal molecules included in the liquid crystal droplets are configured to have an orientation parallel to the surface of the light guide in the electric field.
Abstract:
A display element includes a light source, an optical waveguide, a light-extracting portion. The optical waveguide has two ends and a side surface. One of the two ends is near the light source. The other of the two ends is far from the light source. The side surface extends from the one end to the other end. The light-extracting portion is provided near the side surface to extract light out of the optical waveguide. In addition, the other end changes a light path of forth-traveling light so that an incident angle of back-traveling light is smaller than the incident angle of the forth-traveling light.
Abstract:
According to one embodiment, a display device includes: a plurality of light guide units; a light source; a support substrate; a first electrode transmissive to light provided on the second major surface; a counter substrate opposed to the second major surface and provided away from the first electrode; a second electrode transmissive to light provided on a surface of the counter substrate opposed to the second major surface; and a plurality of spacers provided between the support substrate and the counter substrate and arranged between adjacent ones of the plurality of light guide units when projected onto a plane parallel to the first direction and the second direction. Optical characteristics in a region which is surrounded by adjacent ones of the spacers, the first electrode and the second electrode are changed by a voltage which is applied between the first electrode and the second electrode.
Abstract:
According to one embodiment, a display device includes light emitting units, light guides, light extraction units, and a light receiver. The light emitting unit emits a light. The light guide guides the light. The light guide includes a side surface, and first and second ends. The side surface extends along a first direction. The light guides are disposed in a second direction intersecting the first direction. The light extraction unit faces the side surface and emits a light guided through the light guide toward an outside. The light receiver faces the first end and includes a photoelectric converter. The photoelectric converter receives a light which is guided through the light guide and emitted from the first end.
Abstract:
A display apparatus includes a plurality of optical waveguides which are arranged in a row and have light output areas, a plurality of light sources which emit light beams incident upon the optical waveguides, a plurality of scanning lines whose cross-sections have convex portions and concave portions alternately positioned in a column, wherein inner surfaces of each of the convex portions and the concave portions are arranged so as to face the optical waveguides, and, by applying an electric field, the convex portions and the concave portions undergo displacement, and a control unit which controls the scanning lines with the application of an electric field sequentially.
Abstract:
A display apparatus includes a display part in which a plurality of light guide elements are extended in the column direction, and are arranged in the row direction in parallel with each other. A plurality of scanning lines are extended in the row direction to intersect the light guide elements, arranged in the column direction, transmission lines are extended along the light guide elements, and each of the transmission lines is connected to the scanning lines, respectively. Control elements are provided at intersections of the light guide elements and the scanning lines, and each of the control elements causes a part of a light beam traveled in the light guide element to the outside of the light guide element in response to a scanning signal supplied to the scanning line through the transmission line.
Abstract:
According to one embodiment, a display element includes a light guide and a light extraction unit. The light guide extends in one direction, and is optically transmissive. The light extraction unit includes a displacement layer, a reflective layer provided on the displacement layer, and a light extraction layer provided on the reflective layer to oppose the light guide. A plurality of prisms are formed in one major surface of the light extraction layer opposing the reflective layer. A trough line is formed between mutually-adjacent ridgelines. The element has at least one selected from a configuration in which an angle between one of the oblique surfaces and one other major surface of the light extraction layer opposing the light guide is different between corresponding oblique surfaces of two mutually-adjacent prisms and a configuration in which the ridgelines of the prisms are non-parallel to the trough line between the ridgelines.
Abstract:
A light-emitting element includes: a light source; a light guide member having a columnar shape and comprising a plurality of side surfaces containing a pair of parallel total reflection principal surfaces and other surfaces than the total reflection principal surfaces, an upper bottom surface disposed so that light from the light source reaches the total reflection principal surfaces, and a lower bottom surface disposed opposite to the upper bottom surface; clad portions provided on the other side surfaces of the light guide member than the total reflection principal surfaces, the clad portions having a smaller refractive index than that of the light guide member; and a light extraction portion provided on one part of the total reflection principal surfaces.