Abstract: A backlight unit is provided which includes: a bottom chassis; a light source on the bottom chassis; an optical sheet over the light source; and a support between the bottom chassis and the optical sheet, and configured to support the optical sheet. The support includes: a fastening portion fastened to the bottom chassis, a support portion contacting the optical sheet, and a body portion between the fastening portion and the support portion. The body portion includes: a first portion extending in a first direction; a second portion extending in the first direction and is between the first portion and the fastening portion; and a third portion which connects the first portion and the second portion. The first portion and the second portion are spaced apart from each other.

Abstract: In one aspect, an optical system is disclosed, which includes a light guide having an input end for receiving light from at least one light source and an output end through which light exits the light guide, said light guide further having at least one highly reflective surface positioned to provide specular reflection of at least a portion of the light entering via the input end of the light guide, where the highly reflective surface exhibits a specular reflectance of at least about 95% for light with one or more wavelengths in a wavelength range of about 380 nm to about 780 nm.

Abstract: A module integrated with an optical sensor, a display panel, and a display apparatus. A light guide plate and the optical sensor are arranged in a thickness direction. A first part of the light guide plate at least partially overlaps the optical sensor in the thickness direction, and a second part does not overlap the optical sensor. A surface that is of the first part and that is away from the optical sensor is a first protrusion structure, and an included angle between at least a partial side edge of the second part and the thickness direction is greater than 0°. In the embodiments of this application, the second part that protrudes from the optical sensor may receive an optical signal around the optical sensor, and enable the optical signal to be totally reflected inside the light guide plate.

Abstract: The invention discloses a diffusion plate for use in a backlight module with a low optical path distance (OD), which can be assembled on a backlight module with a plurality of light-emitting diodes (LEDs) as the light source below. Different diffusion particle additives are added to the surface layers and the main layer of the diffusion plate, and then extrude it with foaming extrusion technology. By making different combinations of the refractive index and the amount of the original resin materials, microbubbles, and diffusion particle additives of the surface layers and the main layer, the light refractive index of the upper and lower surface layers is substantially greater than which of the main layer. Such that, the light emitted by the light source below can be diffused more effectively, and thereby achieving a better shading effect of MURA, so as to produce a uniform surface light source.

Abstract: A backlight module, an assembly method of the backlight module, and a display device are provided in the disclosure. The backlight module includes a backplane, a light bar, a light-guide plate, a reflective sheet fixed on a first side of the backplane, and an adhesive layer. The light bar includes a circuit board and multiple light sources. The circuit board has a first region and a second region connected with the first region. The multiple light sources are fixed on the first region. The adhesive layer is fixed on the second region. The light-guide plate is at least partially fixed on the second region via the adhesive layer. The light bar and the light-guide plate are both mounted on the first side of the backplane. The reflective sheet is between the backplane and the light-guide plate.

Abstract: Provided is an optical member, which is suppressed from causing a reduction in display quality due to wear or a flaw resulting from its vibration while maintaining the excellent characteristics of its low-refractive index layer. The optical member includes: a light guide plate having an end surface that light from a light source enters and an emitting surface from which the entered light is emitted; and a reflective plate bonded to a side of the light guide plate opposite to the emitting surface via a double-sided pressure-sensitive adhesive film. The double-sided pressure-sensitive adhesive film includes a first pressure-sensitive adhesive layer, a low-refractive index layer, and a second pressure-sensitive adhesive layer from the light guide plate side. The optical member further includes a surface-treated layer formed on a side of the reflective plate opposite to the double-sided pressure-sensitive adhesive film.

Abstract: It is an object of the present invention to provide a decorative lighting device and a game machine, with which the brightness of a light presentation can be increased and a light presentation with a more dramatic effect can be given even if the number of light sources is limited. A decorative lighting device (1), which has an elongated shape in the vertical direction and is installed on both sides of a game machine, comprises a case (2) in which at least the front and side surfaces of the device are open; a transparent cover (3) that covers the open portion of the case (2); a plurality of light guide plates (4S, 4M, 4L) that are housed inside the case (2) and are disposed spaced apart in the front-rear direction of the device, with each light emitting surface (4a) facing the front surface of the device; and a plurality of light sources provided corresponding to the plurality of light guide plates (4S, 4M, 4L).

Abstract: The invention provides a vapor chamber element (1000), wherein the vapor chamber element (1000) comprises a first plate (110) and a second plate (120) with a chamber (100) in between, wherein the chamber (100) has a first height (H1), wherein the vapor chamber element (1000) further comprises bridging elements (150) bridging at least part of the first height (H1), wherein the vapor chamber element (1000) comprises a plurality of sections (130) configured along a first axis (A), wherein the plurality of sections (130) comprises (i) a bending section (131) having a first volume fraction V1 of bridging elements (150), and (ii) a basic section (133) having a second volume fraction V2 of bridging elements (150), wherein 2?V1/V2.

Abstract: A waveguide combiner includes an in-coupling area, a waveguide body and an out-coupling area. The in-coupling area is configured to introduce a light beam. The waveguide body is configured to guide the light beam introduced by the in-coupling area. The out-coupling area is configured to output the light beam guided by the waveguide body. The waveguide body includes at least one of a beam-expanding part configured to expand the light beam to a predetermined direction by reflecting the light beam and a beam-folding part configured to change the light beam to a different direction by reflecting the light beam.

Abstract: Some embodiments of the present disclosure disclose an LED backlight module and a display device, a plurality of light-emitting units are distributed on a substrate of the LED backlight module, and the surface of the substrate is provided with a plurality of solder mask window areas for the plurality of light-emitting units to abut against, and a conductive circuit connecting two adjacent light-emitting units includes a main circuit and an auxiliary circuit; a remaining portion of the substrate except for the solder mask window area is coated with an insulating material, an alignment error in the coating process causes the reserved solder mask window area to be covered and an actual solder mask window area to shift, since the auxiliary circuit passes through the solder mask window area and a routing-wiring direction is intersected the connecting-wiring direction of the two electrodes of the light-emitting units.

Abstract: A light-emitting assembly includes a substrate and a plurality of light-emitting elements. The substrate includes a component arrangement region and a planar region in a top view, and includes a base material layer, a filled layer and a protection layer in a sectional view. A thickness of the filled layer is greater than a thickness of the protection layer. The thickness of the protection layer is greater than 0 ?m and less than 30 ?m. The plurality of light-emitting elements are located on the component arrangement region. This disclosure can improve the non-uniform brightness issue (hotspots) or enhance the optical performance.

Abstract: An LED downlighting apparatus includes a housing with a sidewall having a front facing edge and a back facing edge positioned adjacent to a ceiling when the LED downlighting apparatus is installed in an opening of the ceiling. A depth of the sidewall is less than one inch and a thickness of at least a portion of the sidewall is less than three millimeters. An LED board and a lens are coupled to the housing. The lens is disposed with respect to the LED board such that the lens is illuminated from a back side. One or more mechanical couplers snap fit the apparatus to a junction box installed and positioned above the ceiling such that when the apparatus is snap fit to the junction box through the opening of the ceiling, the housing appears to be surface mounted to the ceiling.

Abstract: An over-the-range appliance mountable over a cooktop appliance is provided. The over-the-range appliance includes a cabinet comprising a bottom panel defining a central aperture, a lighting box mounted within the central aperture. The lighting box defines a lighting recess and one or more light sources are mounted to the lighting box and are positioned within the lighting recess. A diffuser plate is positioned over the one or more light sources and encloses the lighting recess.

Abstract: A white light emitting device, including a circuit board; a plurality of light sources mounted on the circuit board, each light source of the plurality of light sources configured to emit monochromatic light; a light converter spaced apart from the circuit board, the light converter configured to convert the monochromatic light emitted from the light sources to white light; and a compensator provided between the circuit board and the light converter, the compensator configured to convert the emitted monochromatic light to white light.

Abstract: A light guide assembly includes a light guide plate and a light guide strip around the periphery of the light guide plate, where a plurality of light-transmitting holes are formed on one side of the light guide strip facing to the light guide plate, and at least one end of the light guide strip is an light incident side. The light is incident to the inside of the light guide strip from the light incident side, and then is incident into the light guide plate from the light-transmitting holes on the side of the light guide strip, and thus becomes a surface light source.

Abstract: According to an aspect of the present disclosure, a luminaire comprises a housing and at least one waveguide comprising first and second opposite waveguide ends, a coupling portion disposed at the first waveguide end, and a light emitting portion disposed between the first and second waveguide ends. The luminaire is further arranged such that the first waveguide end is disposed adjacent a first luminaire end and the second waveguide end is disposed at a second luminaire end opposite the first luminaire end. Still further, the luminaire comprises at least one LED element disposed within the housing adjacent the coupling portion of the at least one waveguide such that the at least one waveguide provides a first illumination pattern and the at least one waveguide is interchangeable with another waveguide that provides a second illumination pattern.

Abstract: Provided herein is a display device including a base layer having a non-sensing area and a sensing area configured to surround the non-sensing area, a touch sensor disposed on the sensing area of the base layer, an optical structure disposed on the base layer, and a polarization layer disposed on the touch sensor so as to overlap the sensing area. The touch sensor and the optical structure include a first through hole located in the non-sensing area, and the non-sensing area includes a first area corresponding to the first through hole and a second area configured to surround the first area. The optical structure is disposed in the second area, and includes an optical pattern including a plurality of openings.

Abstract: According to one embodiment, an illuminating device includes a lightguide plate including a curved emitting surface, and an incidence surface including a side edge curved along the emitting surface, a printed circuit board facing the incidence surface, and light sources mounted on the printed circuit board. Each light source includes a light-emitting center, a pair of connection terminals, and a central axis extending through the connection terminals and the light-emitting center. The light sources are arranged along a curved mounting line extending along the curved side edge of the incidence surface on the printed circuit board. The light-emitting centers are located on the mounting line, and the central axes are parallel to each other.

Abstract: A backlight module includes an optical plate, a light source, and at least one optical film. The optical plate includes a light-emitting surface, a bottom surface and a side surface. The light source faces to the bottom surface or the side surface. The optical film is disposed above the light-emitting surface and includes a main body and at least one refractive part disposed on an end surface of the main body. The refractive part includes a plurality of microstructures and a substrate. The substrate is adhered to the end surface, and the microstructures are distributed in the substrate.

Abstract: A light fixture includes a visible light module and a germicidal light module. The visible light module may include one or more visible light engines designed for emitting visible light for general illumination. The visible light module may define a top side, a bottom side opposite the top side, and an outer perimeter around the top side and the bottom side. The visible light module may define an aperture extending through the visible light module from the top side to the bottom side. The visible light module may be designed to emit the visible light out of and across the bottom side from the outer perimeter to an inner perimeter defined by the aperture. The germicidal light module may be coupled to the visible light module. The germicidal light module includes a germicidal light engine designed to emit germicidal light through the aperture effective in deactivating pathogens.

Abstract: An optical film includes a light-transmissive substrate and a first annular lens group. The light-transmissive substrate has a first surface and a second surface opposite to each other. The first annular lens group is disposed on the second surface, and the first annular lens group is configured to allow light to pass through. The reflectivity of the first annular lens group decreases along a direction away from a central axis of the first annular lens group, and an extending direction of the central axis is the same as a thickness direction of the light-transmissive substrate.

Abstract: Embodiments of the present disclosure provide a backlight module, a liquid crystal display apparatus, and a method of manufacturing the backlight module. The backlight module includes: a support plate including a first surface; a light source fixed to the first surface of the support plate, having a light exit face, and configured to emit a light from the light exit face; an adhesion assembly disposed on the first surface of the support plate, and including at least one adhesion part extending from the light exit face of the light source in a direction away from the light source; and a light guide plate including: a bottom surface adhered to the first surface of the support plate through the at least one adhesion part of the adhesion assembly; a top surface located opposite to the bottom surface and serving as a light exit face of the light guide plate; and a side surface surrounding the bottom surface and the top surface. A portion of the side surface serves as a light entry face of the light guide plate.

Abstract: A composite sheet, including: a buffer sheet; and a heat dissipation sheet on one surface of the buffer sheet. One surface of the heat dissipation sheet facing the one surface of the buffer sheet may have a smaller area than the one surface of the buffer sheet. A display device includes a display panel and a composite sheet on one surface of the display panel.

Abstract: A touch sensing apparatus is disclosed comprising a panel that defines a touch surface, a plurality of light emitters and detectors arranged along a perimeter of the panel. The light emitters are arranged to emit a respective beam of emitted light that travels above the touch surface, wherein the light detectors are arranged to receive detection light from the emitted light. The plurality of light emitters and detectors are arranged above the touch surface and are connected to a substrate extending in a direction parallel with a normal axis of a plane in which the panel extends. A method of assembling a touch sensing apparatus is also disclosed.

Abstract: An illuminated touch panel includes a backlight assembly and a cover plate. The backlight assembly includes a light guide plate, and an outer stop. The light guide plate includes a plurality of bar portions and a connecting portion. The plurality of bar portions are separated from each other and arranged side by side. Each of the bar portions includes a pattern dot region, a connecting end and a light entrance end. There is a narrow slot between any two adjacent bar portions. The long axis direction of each of the extending dot regions of the connecting portion is substantially parallel to the length direction of each of the narrow slots. The plurality of light blocking bars of the outer stop are arranged side by side and fitted with the plurality of narrow slots. The cover plate includes a plurality of window regions corresponding to the plurality of pattern dot regions.

Abstract: A display device is disclosed. The display device comprises: a display panel; a light guide plate arranged behind the display panel so as to guide light to the display panel, and having at least one end curved away from the display panel; at least one light source for emitting light toward a surface, on which light is incident, of at least one end of the light guide plate; and at least one reflection part arranged adjacently to at least one light source so as to reflect the light toward the display panel.

Abstract: Embodiments of the present disclosure provide a display panel and a display device. In the display panel, by disposing a light source on a lateral side of a first base substrate, using the first base substrate as a light guiding plate, and respectively disposing a metal wire grid and a second metal wire grid on a lateral side of the first base substrate and under the first base substrate, light is emitted upwards. Moreover, a diffuse reflection layer and an optical structure layer are disposed on the first substrate, so that there is no need to dispose a backlight module. Due to no need for a reflective film and a backlight structure, the display panel achieves transparent display.

Abstract: A lighting arrangement and a method of coupling light into a light guide are described. A light source is embedded within a light guide. The light guide includes first and second outer surfaces arranged on opposite sides. A forward direction extends from the light source parallel to the first outer surface. A collimator is embedded within the light guide. The collimator comprises a first reflector surface facing towards the second outer surface and a second reflector surface facing towards the first outer surface. The light source is arranged to emit light between the first and second reflector surfaces. The first reflector surface is arranged at least substantially parallel to the forward direction. At least a portion of the second reflector surface is arranged under an angle to the forward direction.

Abstract: According to one embodiment, an illumination device includes a light source disposed along a first direction, a light guide plate including a first end and a second end, the second end being positioned to be opposite to the first end in a second direction which crosses the first direction, a frame disposed along the second end and including an inner surface and an upper surface, and an adhesion member disposed on at least the upper surface of the frame, wherein the light source is disposed at the first end along the first direction, at least the inner surface of the frame is a light absorbing surface, and the adhesion member is light transmissive.

Abstract: A light-emitting device includes a light-emitting element having a light-emitting surface, and a plurality of protruding portions being separated from each other and disposed on the light-emitting surface. The protruding portions are transparent. Each of the protruding portions includes a light guide portion and a light distribution control portion. The light guide portion has a columnar configuration and is provided at a light-emitting surface side of the protruding portion. The light distribution control portion is provided on the light guide portion. The light distribution control portion is asymmetric with respect to a central axis of the light guide portion and has a tilted surface that is tilted with respect to the central axis.

Abstract: A direct type backlight module includes a back plate, a light emitting element, and a frame body. The light emitting element is disposed on the back plate and configured to provide an illumination beam. The frame body is disposed on the back plate to surround the light emitting element. The frame body includes a light transmitting portion and a reflecting portion. The light transmitting portion is located at an edge of a light emitting side of the direct type backlight module. The reflecting portion is located between the light transmitting portion and the back plate. The light transmitting portion has a carrier portion, wherein the illumination beam is configured to be transmitted into the light transmitting portion, transmitted to the carrier portion of the light transmitting portion by reflection of the reflecting portion, and then emitted. A display device including the direct type backlight module is also provided.

Abstract: A terminal device includes a middle frame, a light-absorbing and heat-dissipating film disposed in the middle frame, and a display module. The middle frame includes a bottom and a side part connected to the bottom. The side part encircles the bottom to form a concavity on the bottom. The light-absorbing and heat-dissipating film covers the inner surfaces of the bottom and the side part. The display module is disposed in the concavity.

Abstract: An optical chamber, an optical system, and a display device are provided. The optical chamber includes: a plurality of sidewalls, including a first sidewall having at least one opening, configured to reflect light in the optical chamber; and a light path adjusting element connected with the first sidewall, wherein the orthographic projection of the light path adjusting element onto the plane where the first sidewall lies at least partially lies in the area where the opening is located, and the light path adjusting element is configured to uniformly emit the light reflected by the plurality of sidewalls to the outside.

Abstract: Embodiments of the present disclosure provide backlight module, display device and driving method. The backlight module comprises: light guide plate for emitting light from light-exiting surface of the light guide plate along light-exiting direction; monochromatic light sources of different colors located on a side of the light guide plate on which incident surface is located; optical path adjusting portion located on the incident surface of the light guide plate, for making light emitted by the monochromatic light sources be incident to the light guide plate from the incident surface of the light guide plate at different incident angles, wherein the light incident to the light guide plate is propagated with a total reflection; and light extracting gratings arranged in an array, located on the light-exiting surface of the light guide plate, for extracting the light with same preset angle.

Abstract: A display device includes a light emitter comprising a set of light emitter portions, wherein at least one light emitter portion of the set is configured to emit light with an excitation wavelength, and a color conversion layer including a set of conversion layer portions. At least one conversion layer portion of the set comprises a film comprising a solid polymer composition that includes luminescent crystals of perovskite structure, which are selected from compounds of formula (I): M1aM2bXc (I), wherein M1 represents Cs, M2 represents Pb, and X independently represents anions selected from the group consisting of Cl, Br, I, cyanide, and thiocyanate. The luminescent crystals are of size between 3 nm and 3000 nm, and emit light of a wavelength in response to excitation by the light emitted by at least one corresponding light emitter portion of the set, wherein the excitation wavelength is shorter than the wavelength.

Abstract: The display assembly includes: a light source configured to emit light; a light guide plate disposed to receive light emitted from the light source on a lateral side; and a color transformer disposed proximate to an edge of the light guide plate, and configured to change a color of light incident to the color transformer.

Abstract: A waterproof light emitting module is provided. The waterproof light emitting module comprises a circuit board, a light emitting diode, a light guide plate, and a waterproof layer. The light emitting diode is over the circuit board, and having a light emitting surface, a first non-light emitting surface and a second non-light emitting surface. The light guide plate is adjacent to the light emitting surface of the light emitting diode. The waterproof layer covers the first non-light emitting surface and the second non-light emitting surface of the light emitting diode. The waterproof layer includes an adhesive, a substrate, a recessed portion of the light guide plate, a portion of the circuit board or a combination thereof. A display device including the waterproof light emitting module is also provided herein.

Abstract: The backlight module includes a bracket, a light emission module, a reflective film, and first glue structures. The bracket has a first plate and a second plate opposite to each other, and a third plate connecting the first plate to the second plate. The light emission module is disposed between the first plate and the second plate and includes light emission elements. The reflective film is disposed between the light emission elements and the first plate. The reflective film is mounted on the first plate of the bracket through the first adhesive structures. The first adhesive structures vertically project on the first plate at a plurality of first areas respectively, the light emission elements vertically project on the first plate at a plurality of second areas respectively, and the first areas do not overlap with the second areas.

Abstract: A waterproof light emitting module includes a circuit board, a light emitting diode, a light guide plate, first, second, and third waterproof layers. The light emitting diode is over the circuit board and has a light emitting surface, and first and second non-light emitting surfaces. The light emitting surface is opposite to the first non-light emitting surface. The second non-light emitting surface is between the light emitting surface and the first non-light emitting surface. A center of the light guide plate is substantially aligned with a center of the light emitting diode along a direction perpendicular to the light emitting surface. The light emitting diode is between the first waterproof layer and the light guide plate. The second waterproof layer covers the second non-light emitting surface. The third waterproof layer is between the second waterproof layer and the light guide plate.

Abstract: A display device includes a light source that includes a blue light-emitting diode (LED) configured to generate a blue output light; a nanocrystal material that is disposed between the light source and a liquid crystal module, and a light guide assembly. The nanocrystal material receives the blue output light, converts a first portion of the blue output light to a green light emission, converts a second portion of the blue output light to a red light emission, and transmits a remainder portion of the blue output light. The light guide assembly includes a planar light guide optically coupled to a light-receiving surface of the liquid crystal module and a curved light guide optically coupled to the planar light guide and configured to receive light from the light source and direct the light toward the planar light guide.

Abstract: A light guiding structure of a backlight device having an insulation substrate, a micro LED, a reflecting layer, a light guiding layer and reflecting film. An illuminating surface is formed on the insulation substrate. The reflecting layer is stacked on the insulation substrate and stacked with the light guiding layer. The micro LED is arranged on the illuminating surface and illuminating toward a direction perpendicular to the illuminating surface. The reflecting film is stacked on the illuminating surface and covering on the micro LED, an edge of the light guiding layer is stacked between an edge of the reflecting film and the reflecting layer, a reflecting slope is defined on the reflecting film and extended from the micro LED to the edge of the light guiding layer. Light projected from the micro LED is reflected into the light guiding layer by the reflecting slope of the reflecting film.

Abstract: The present invention provides a lighting device that is excellent in luminance uniformity and light use efficiency and allows for a narrower frame, and a display device including the lighting device. Provided is a lighting device including: a light guide plate; a light source disposed posterior to the light guide plate; a reflection member including a reflective surface facing a light emitting surface of the light source and a light incident surface of the light guide plate, disposed lateral to the light guide plate and the light source, the lighting device further including a reflective polarizing layer on the light incident surface of the light guide plate.

Abstract: According to one embodiment, an illumination device includes a light source disposed along a first direction, a light guide plate including a first end and a second end, the second end being positioned to be opposite to the first end in a second direction which crosses the first direction, a frame disposed along the second end and including an inner surface and an upper surface, and an adhesion member disposed on at least the upper surface of the frame, wherein the light source is disposed at the first end along the first direction, at least the inner surface of the frame is a light absorbing surface, and the adhesion member is light transmissive.

Abstract: Disclosed are a backlight module and a display apparatus. The backlight module includes an infrared light source, an optical fiber and a conversion component. The infrared light source is connected with an input end of the optical fiber and configured to provide infrared light to the input end of the optical fiber. An output end of the optical fiber is connected with the conversion component and configured to transmit the infrared light to the conversion component. The conversion component includes a tube body, and a plurality of light emitting elements are arranged along an extending direction of the tube body successively in the tube body. The light emitting elements are configured to emit visible light under the irradiation of the infrared light.

Abstract: A planar light source device includes at least a light guide plate and a lamp unit disposed replaceably at a side surface of the plate. The lamp unit includes: a lamp holder having a shape where a surface facing the side surface of the light guide plate is opened; an LED mounted on a flexible cable, the cable fixed on an inner surface of the lamp holder; and a shielding sheet fixed on an outer surface of the lamp holder. An upper portion of the lamp holder located close to a light emitting surface of the light guide plate does not overlap its light emitting surface when viewed from a normal direction of the light emitting surface. One end of the shielding sheet is fixed to the upper portion of the lamp holder, the other end being closely attached to the light emitting surface of the light guide plate.

Abstract: Provided is a partial drive-type light source device capable of suppressing coloring of a section intended to be a dark section when a plurality of light-emitting elements is driven in a partial manner. The partial drive-type light source device includes an excitation light source, a phosphor sheet that is disposed at a position separated from the excitation light source and contains a phosphor that releases emitted light in a wavelength region differing from incident light, and a wavelength-selective reflection film that is disposed between the excitation light source and the phosphor sheet and that transmits at least part of light in the wavelength region of the incident light from the excitation light source and reflects at least part of light in the wavelength region of the emitted light from the phosphor sheet.

Abstract: A backlight module, which includes: a backplane; a reflector sheet, a light guide plate, and an optical diaphragm group, which are sequentially stacked on the backplane; and multiple connectors disposed at a border of the backlight module, wherein the connector having a space block and an upper connection portion connected to an upper surface of the spacer block, the spacer block is disposed between the backplane and the reflector sheet, the upper connection portion is relatively fixed simultaneously to the reflector sheet, the light guide plate, and the optical diaphragm group. A display device is also disclosed.

Abstract: An imaging directional backlight apparatus includes a waveguide and a light source array, providing large area directed illumination from localized light sources. The waveguide may include a stepped structure, and the steps may further include extraction features optically hidden to guided light, propagating in a forward direction. Returning light propagating in a backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Viewing windows are formed through imaging individual light sources and define the relative positions of system elements and ray paths. The imaging directional backlight apparatus further includes multiple waveguides with light extraction features arranged to provide uniform output luminance at the seam between the waveguides.

Abstract: According to one embodiment, an illumination device includes a light source disposed along a first direction, a light guide plate including a first end and a second end, the second end being positioned to be opposite to the first end in a second direction which crosses the first direction, a frame disposed along the second end and including an inner surface and an upper surface, and an adhesion member disposed on at least the upper surface of the frame, wherein the light source is disposed at the first end along the first direction, at least the inner surface of the frame is a light absorbing surface, and the adhesion member is light transmissive.

Abstract: A light emitting device (102, 202) comprising a light source (104) having a light exit surface, a wavelength converter (106) configured to convert light from a first wavelength to a second wavelength, said wavelength converter having a light exit surface (110) and a light entrance surface, a heat sink (100) and an optical coupling element (112), arranged in thermal connection with said heat sink (100) and said wavelength converter (106), wherein said optical coupling element (112) is selected to have a refractive index lower than a refractive index of said wavelength converter (106). The optical coupling element (112) will allow for an efficient heat transfer from the wavelength converter (106) to the heat sink (100) while avoiding loss of light from unwanted surfaces.