Patent application number | Description | Published |
20090245741 | OPTICAL WAVEGUIDE - The invention relates to an optical waveguide capable of extracting light especially from arbitrary positions of the same. An object of the invention is to provide an optical waveguide capable of extracting light efficiently from arbitrary positions of the same. To achieve the above object and according to one aspect of the invention, an optical waveguide is provided with a core for guiding light, a clad and a displacing structure for the core to contact the clad. The core has a first refractive index. The clad has a second refractive index higher than the first refractive index. | 10-01-2009 |
20100127296 | LIGHT EMITTING APPARATUS AND METHOD FOR MANUFACTURING SAME - A light emitting apparatus, includes: a substrate; a semiconductor device including a semiconductor layer formed integrally on a major surface of the substrate; and a light emitting device formed separately from the substrate. The light emitting device is mounted on the major surface of the substrate, electrically connected to the semiconductor device, and thermally connected to the substrate. | 05-27-2010 |
20120019737 | DISPLAY DEVICE - A display device includes a light source, an optical waveguide, a light-extracting portion, a liquid crystal dispersion layer and a drive circuit. The optical waveguide has two ends to guide light from one of the two ends to the other end. The light is emitted by the light source. The light-extracting portion is provided to a side face of the optical waveguide. The liquid crystal dispersion layer is included in the light-extracting portion and includes liquid crystal droplets whose mean diameter is 100 nm or less. The drive circuit applies a voltage to the light-extracting portion to generate an electric field in the liquid crystal dispersion layer so that the light transmitting through the optical waveguide is scattered to be extracted. | 01-26-2012 |
20120033432 | DISPLAY ELEMENT - 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. | 02-09-2012 |
20120038848 | BACKLIGHT AND LIQUID CRYSTAL DISPLAY DEVICE - A backlight includes a case having plural apertures in a main face thereof and a light source disposed in the case. A total area of the plural apertures is not less than 8% and not more than 15% of an area of the main face. | 02-16-2012 |
20120113680 | LIGHT GUIDE BODY AND SURFACE LIGHT SOURCE - According to one embodiment, a light guide body includes a light guide plate and a prism array unit. The light guide plate has a major surface, a first side surface, and a second side surface on an opposite side to the first side surface. The prism array unit is provided on the major surface to be in contact with the major surface. The prism array unit includes a plurality of prism bodies. Each of the prism bodies extends along a first direction from the first side surface to the second side surface. The prism bodies are disposed to align along a second direction parallel to the major surface and perpendicular to the first direction. A vertex angle of the prism bodies is a substantially right angle. A refractive index of the prism bodies is higher than a refractive index of the light guide plate. | 05-10-2012 |
20120176423 | DISPLAY DEVICE AND LIGHT SOURCE DEVICE - According to one embodiment, a display device includes an optical switch panel, and a light source device. The optical switch panel includes pixels and a drive part controlling transmissivity of the pixels. The light source device is stacked with the panel and includes a light source to emit a source light, a light guiding unit, interference filters, and light controlling parts. The light guiding unit includes a light guide region guiding the source light, a reflecting part provided around the region to reflect the source light, and apertures provided around the region and causing semi-collimated light to be emitted. The interference filters cause lights in certain wavelength dands of the light emitted from the aperture to pass. The light controlling parts cause the lights through the filters to enter the pixels to form an image. | 07-12-2012 |
20120188499 | DISPLAY DEVICE - 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. | 07-26-2012 |
20120207431 | OPTICAL DEVICE UTILIZING OPTICAL WAVEGUIDE AND DISPLAY DEVICE - In one embodiment, in an optical device, a bar-shaped optical waveguide has either a polygonal or circular cross-sectional shape. A light entry portion is formed in a circumferential area of a first-end surface of the optical waveguide. The light entry portion includes a sloping surface having a normal vector containing a component in a circumferential direction of the first-end surface. An incident light beam travels towards a second-end surface of the optical waveguide while repeating total reflections on a side surface of the optical waveguide. The incident light beam travels without passing through a central portion in a cross section of the optical waveguide. A light exit portion is formed in the side surface of the optical waveguide. The light exit portion is configured to let the light beam in the optical waveguide out of the optical waveguide. | 08-16-2012 |
20120218778 | DISPLAY ELEMENT AND DISPLAY DEVICE - 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. | 08-30-2012 |
20120327069 | DISPLAY DEVICE - According to one embodiment, a display device includes a light source, a light guide, a light extraction unit, and a drive circuit. The light source emits a first light. The light guide has a first end, a second end arranged in a first direction, and a side surface extending in the first direction. The light guide guides the first light from the first end toward the second end. The light extraction unit opposes the side surface, and includes first and second conductive units provided parallel to the side surface. The light extraction unit extracts the first light guided inside the light guide by coming close to the side surface for a state in which a voltage is applied to the first and second conductive units. The drive circuit applies the voltage between the first and second conductive units. | 12-27-2012 |
20130021556 | DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a display device includes a main substrate, and a light control layer. The main substrate includes a main base having a main surface, a wavelength selective transmission layer provided on the main surface, and a circuit layer provided on the wavelength selective transmission layer. The light control layer is stacked with the main substrate and has variable optical characteristics. The wavelength selective transmission layer includes lower and upper reflecting layers, and first and second spacer layers. The upper reflecting layer is provided on the lower reflecting layer. The first spacer layer is provided between the lower and upper reflecting layers. The second spacer layer is provided between the lower and upper reflecting layers, and has a different thickness from the first spacer layer. The circuit layer includes first and second pixel electrodes, and first and second switching elements. | 01-24-2013 |
20130070482 | DISPLAY DEVICE AND BACKLIGHT FOR DISPLAY DEVICE - According to one embodiment, a display device includes a light-guiding body, a light source, a wavelength selection transmission layer, and a light control layer. The light-guiding body has a first major surface, a second major surface opposite to the first major surface, and a side face connecting the first major surface and the second major surface. The wavelength selection transmission layer is provided on the second major surface. The first major surface has a plurality of concave portions having inclined faces inclined relative to the first major surface. A ratio of a total area of the plurality of the concave portions projected on the first major surface, relative to an area of the first major surface is 8% to 25%. The plurality of the concave portions is evenly provided in the first major surface. | 03-21-2013 |
20130077021 | DISPLAY DEVICE - According to one embodiment, a display device includes light guide bodies, light sources, light extraction units, and a control unit. Each light guide body includes one end, another end on an opposite side, and a side surface. The light guide bodies are disposed with a pitch. Each of the light sources is juxtaposed to the one end of each light guide body and configured to cause a light to enter the light guide bodies. Each light extraction unit faces the side surface. Each light extraction unit includes light extraction elements. The control unit is configured to supply an electric signal to each light extraction unit. The control unit makes the light extraction units extract the light that enters the light guide bodies and propagates through the light guide bodies in accordance with the electric signal. Positions between the light extraction elements are uniformly distributed. | 03-28-2013 |
20130077029 | INTERFERENCE FILTER AND DISPLAY DEVICE - According to one embodiment, an interference filter includes a base body, a lower semi-transmissive layer, and an upper semi-transmissive layer. The base body includes a major surface. The lower semi-transmissive layer is provided on the major surface. The upper semi-transmissive layer is provided on the lower semi-transmissive layer. The base body, the lower and upper semi-transmissive layers form a first region to selectively transmit blue light, a second region to selectively transmit green light, and a third region to selectively transmit red light, arranged in a plane parallel to the major surface. A distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the second region is shorter than a distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the first region, and shorter than a distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the third region. | 03-28-2013 |
20130077342 | DISPLAY DEVICE - 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. | 03-28-2013 |
20130082904 | DISPLAY DEVICE - 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. | 04-04-2013 |
20130121026 | DISPLAY DEVICE - 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. | 05-16-2013 |
20130271698 | BACKLIGHT AND LIQUID CRYSTAL DISPLAY DEVICE - A backlight includes a case having plural apertures in a main face thereof and a light source disposed in the case. A total area of the plural apertures is not less than 8% and not more than 15% of an area of the main face. | 10-17-2013 |
20140049986 | LIGHT GUIDE BODY AND SURFACE LIGHT SOURCE - According to one embodiment, a light guide body includes a light guide plate and a prism array unit. The light guide plate has a major surface, a first side surface, and a second side surface on an opposite side to the first side surface. The prism array unit is provided on the major surface to be in contact with the major surface. The prism array unit includes a plurality of prism bodies. Each of the prism bodies extends along a first direction from the first side surface to the second side surface. The prism bodies are disposed to align along a second direction parallel to the major surface and perpendicular to the first direction. A vertex angle of the prism bodies is a substantially right angle. A refractive index of the prism bodies is higher than a refractive index of the light guide plate. | 02-20-2014 |
20140098567 | DISPLAY DEVICE - According to one embodiment, a display device includes light sources, light guides, interconnects, first electrodes, a second electrode, an insulating layer and a drive unit. The light guides extend in a first direction. The interconnects extend in a second direction. Each of the first electrodes is connected to each of the interconnects. Slits are provided in each of the first electrodes. The second electrode is provided between the first electrodes and the light guides. The insulating layer is provided between the first and second electrodes. The drive unit is connected to the interconnects and the second electrode. The drive unit creates first and second states by changing a voltage between the first and second electrodes. The light is extracted from the light guides in the first state. An intensity of the light extracted in the second state is lower than that in the first state. | 04-10-2014 |
20140327706 | DISPLAY DEVICE AND METHOD FOR ADJUSTING DISPLAY DEVICE - According to one embodiment, a method is disclosed for adjusting a display device. The device includes light sources, light guides, light extraction units, and a controller. The light guides have an incident portion, one other end portion, and a side surface. The light extraction units form pixels. The controller supplies an electrical signal to the light extraction units to form a light-extracting state and a non light-extracting state. The method can include light intensity acquisition processing, change amount calculation processing, and light intensity modification processing. The acquisition processing acquires first and second intensities of the light. The calculation processing calculates a ratio of a difference between the first and second intensities to a difference between a first previous intensity in the light-extracting state and a second previous intensity in the non light-extracting state. The modification processing reduces the intensity of the light in the light-extracting state. | 11-06-2014 |
20150022765 | DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a display device includes a main substrate, and a light control layer. The main substrate includes a main base having a main surface, a wavelength selective transmission layer provided on the main surface, and a circuit layer provided on the wavelength selective transmission layer. The light control layer is stacked with the main substrate and has variable optical characteristics. The wavelength selective transmission layer includes lower and upper reflecting layers, and first and second spacer layers. The upper reflecting layer is provided on the lower reflecting layer. The first spacer layer is provided between the lower and upper reflecting layers. The second spacer layer is provided between the lower and upper reflecting layers, and has a different thickness from the first spacer layer. The circuit layer includes first and second pixel electrodes, and first and second switching elements. | 01-22-2015 |