Abstract: This edge light-type backlight device comprises a light guide plate, a light source disposed at one end part of the light guide plate, a light diffusion sheet and a prism sheet on a light emission face of the light guide plate. The refractive index of the prism sheet exceeds 1.60, a peak of emitted light distribution of the light emission face in a plane parallel to the one end part of the light guide plate and orthogonal to the light emission face is within an angle ranges of 30°˜45° and ?30°˜?45° with respect to a normal direction of the light emission face. The emitted light of the light emission face diminishes toward an emission angle ?90° or 90° with respect to the normal line from the angle ranges of the peak of the emitted light distribution. High frontal brightness and diffusion are realized.

Abstract: A backlight module includes a light guide plate, at least one light source, and a reflective plate. The light source is configured for emitting light toward the light guide plate. The reflective plate has a plurality of reflective units arranging along a curved direction. Each of the reflective units includes a body and a plurality of microstructures. The body has a main surface facing the light guide plate. The plurality of microstructures are disposed on the main surface of the body. Each of the microstructures has a reflective surface. A first angle is included between the reflective surface of each of the microstructures and the main surface of the body. The first angles of the microstructures in one reflective unit are different from the first angles of the microstructures in an adjacent reflective unit.

Abstract: A reflective film includes a first section in which a layer including a resin A and a layer including a resin B are alternately laminated in 200 layers or more, and a second section including a resin C which meets at least one of (I) to (III), the sections arranged laminatedly in the thickness direction, wherein relative average reflectance at a wavelength of 400 to 700 nm of light incident upon the first section side arranged laminatedly is 70% or more, and the reflectance of a specular reflection component is 10% or more of the relative average reflectance: (I) voidage in the second section is 5% to 90%; (II) content of inorganic particles in the second section is 5% to 50% by mass; and (III) content of organic particles in the second section is 3% to 45% by mass.

Abstract: A backlight unit includes a light source. A light guide plate receives light supplied from the light source at an incident light part of the light guide plate. A reflective sheet is positioned below the light guide plate and reflects light upwardly. A diffuser sheet is formed on the light guide plate and diffuses the light to transfer the diffused light upwardly. The diffuser sheet includes a color material, and a concentration of the color material within the diffuser sheet is dependent upon a distance from the incident light part.

Abstract: A diffusing unit includes: a polarizing plate; and a diffusing layer integrally provided on a surface of the polarizing plate without an air layer therebetween. By using a display apparatus employing a collimating light guide plate and the diffusing unit, the optical performances such as resolution and viewing angle can be improved. Also, because gray scale inversion and color shifts can be reduced or eliminated using collimated light, image quality of the display apparatus can be improved.

Abstract: A planar light guide includes a main body with a back face and a radiation outcoupling face opposite thereto, a main direction of light guidance parallel to the radiation outcoupling face, at least one plurality of identically shaped and identically oriented outcoupling structures formed on at least one of the main faces, and at least one structure main face per outcoupling structure, wherein an angle-dependent emission characteristic is provided asymmetrically in a first plane parallel to the main direction of light guidance and perpendicular to the radiation outcoupling face.

Abstract: A liquid crystal display device (10) is provided with the following: an LED (17); a liquid crystal panel (11); a light guide plate (16) disposed so as to overlap the liquid crystal panel (11); an optical member (15) disposed between the liquid crystal panel (11) and the light guide plate (16); a holding member (HM) having a frame (13) and a chassis (14) for holding in a sandwiched manner the liquid crystal panel (11), the optical member (15) and the light guide plate (16); a first object of positioning determination unit (33) disposed at the edge of the light guide plate (16); a positioning determination unit (31) disposed on the frame (13) and for determining the position of the light guide plate (16) in a direction following the plate surface by causing uneven engagement of the light guide plate with respect to the first object of positioning determination unit (33); and a light-shielding sheet (35) for blocking direct incidence of light from the first object of positioning determination unit (33) on the li

Abstract: A set of optical sheets may perform at least one of diffusion, refraction, and condensation of light. The set of optical sheets may include a first optical sheet that includes a first base film and a first distinction unit disposed outside the first base film. The set of optical sheets may further include a second optical sheet that includes a second base film and a second distinction unit disposed outside the second base film. The second distinction unit may be spaced from the first distinction unit in a plan view of the set of optical sheets if the second base film complete overlaps the first base film.

Abstract: A light diffusing member includes a base material having a light transmitting property; a plurality of light blocking sections that are formed in a scattered manner at one surface of the base material; and a light transmissive material layer that is formed at the one surface of the base material. A thickness of the light transmissive material layer is larger than a thickness of each light blocking section. The light transmissive material layer has hollow portions in regions where the light blocking sections are formed. Each hollow portion has a shape in which a cross-section area when each hollow portion is cut at a plane that is parallel to the one surface of the base material is large on a side of the corresponding light blocking section and becomes gradually smaller with increasing distance from the corresponding light blocking section. A portion of the light transmissive material layer other than where the hollow portions are formed is a light transmitting section.

Abstract: A light guide plate (30) includes an extracting light guide layer (40) having a pair of main surfaces (41a, 41b). The extracting light guide layer (40) includes a base portion (45) having a pair of main surfaces (46a, 46b), and a plurality of light diffusing portions (50) provided in the base portion. The light guide plate (30) can obscure extracting elements for extracting light.

Abstract: Extended area lighting devices include a light guide and diffractive surface features on a major surface of the light guide, at least some diffractive surface features adapted to couple guided-mode light out of the light guide. The diffractive features include first and second diffractive features disposed on respective first and second portions of the major surface. A patterned light transmissive layer, including a second light transmissive medium, optically contacts the second diffractive features but not the first diffractive features. A first light transmissive medium optically contacts the first but not the second diffractive features. The first and second portions may define indicia, and the first and second diffractive features provide low distortion for viewing objects through the light guide such that the indicia is not readily apparent to users when guided-mode light does not propagate within the light guide. Optical films having such diffractive features are also disclosed.

Abstract: Example light management films including a plurality of tapered protrusions are described. In many embodiments, a film includes a reflective polarizer layer and a plurality of tapered protrusions disposed on and tapering away from the reflective polarizer layer. At least one tapered protrusion in the plurality of tapered protrusions has a first lateral cross-section at a first location along a height of the tapered protrusion and a second lateral cross-section at a second location along the height of the tapered protrusion. The first cross-section has a first shape and the second cross-section has a different second shape.

Abstract: A planar light source including a light guide plate (LGP) and a light source device is provided. The LGP includes a plate portion and at least one prism portion. The plate portion has a light incident surface, a reflective surface, a bottom surface, and a light exiting surface. The prism portion is disposed on the bottom surface of the plate portion, and has a first plane and a second plane. An included angle between the first plane and the bottom surface is smaller than an included angle between the second plane and the bottom surface, and a shortest distance between the first plane and the light incident surface is smaller than a shortest distance between the second plane and the light incident surface. The light source device is disposed adjacent to the light incident surface. The disclosure provides planar light source with good light uniformity.

Abstract: Optic entrance features may be used to optically control light transfer from a light source to a light emitting panel (LEP). In a particular embodiment, an LEP includes a first LEP side configured to emit light. The LEP also includes a second LEP side. The first LEP side and the second LEP side are opposite sides of the LEP. The LEP further includes a cutout area providing an air gap in the LEP through the first LEP side and the second LEP side. The LEP also includes a light receiving side. The cutout area is proximal to the light receiving side, and the light receiving side is configured to pass light through towards the cutout area.

Abstract: To provide a planar light source device that can provide large-area, uniform, and high-quality planar illumination light. A planar light source device includes a main body case 4 that surrounds the periphery of a gap between a pair of optical reflection plates disposed to face each other with side plates, and a plurality of point light sources 2 arranged at predetermined intervals on at least one side plate of the main body case. The planar light source device allows light from the point light sources 2 to be transmitted through at least one of the pair of optical reflection plates 5 and emitted to the outside.

Abstract: A liquid crystal display device 10 includes an LED 17, a liquid crystal panel 11, a gate flexible boards 28 connected to an end portion of the liquid crystal panel 11, a light guide plate 16 arranged so as to overlap the liquid crystal panel 11, an optical member 15 arranged between the liquid crystal panel 11 and the light guide plate 16, a holding member HM including a frame 13 and a chassis 14 that hold the liquid crystal panel 11, the optical member 15, and the light guide plate 16, a light blocking portion 23A including a gate flexible board insertion recess 29, and a light restriction portion 30 provided to the optical member 15 and arranged in the gate flexible board insertion recess 29. The light blocking portion 23A blocks light on the outer side thereof from directly entering the end portion of the liquid crystal panel 11. The light restriction portion 30 restricts the light from directly entering the end portion of the liquid crystal panel 11 through the gate flexible board insertion recess 29.

Abstract: A display device includes a backlight module, a display panel, a prism film, a light-splitting layer, and a grating layer. The light-splitting layer splits light into a first backlight group and a second backlight group, wherein the two groups are inclined in different directions relative to a light-emitting surface of the backlight module. The grating layer allows the first backlight group to pass while blocking the second backlight group. The prism film has a plurality of prisms disposed facing the display panel. Each prism has a first surface and a second surface, wherein the angle between the first surface and the normal line to the light-emitting surface is greater than the angle between the second surface and the normal line to the light-emitting surface.

Abstract: A lighting unit 5 includes a lighting functional portion 7 and a light guide member 8. The lighting functional portion 7 includes a light source 9 and a light-transmissive housing 11. The light source 9 is constituted by a plurality of types of LEDs with different emission colors. The light guide member 8 is molded using a synthetic resin material having light permeability. The light guide member 8 has a light incidence portion 13, a light-emitting portion 14 provided at a charging port 3 of a housing 2, and an intermediate portion 15 that connects the light incidence portion 13 and the light-emitting portion 14 together. If the light-emitting portion 14 emits light with the guided light, the light-emitting portion can be caused to look like shining the charging port 3 of the housing 2.

Abstract: Provided is a light guide plate including: a main body for guiding incident light and transmitting the incident light from an upper surface of the main body; and a plurality of light converging patterns in a rounded wedge shape having a rounded upper surface on a lower surface of the main body to converge and reflect the incident light in a predetermined direction.

Abstract: A display apparatus comprising a display panel and a light module is provided. The light module comprises a light guide plate, a plurality of light guide elements and at least a light emitting unit. The light guide plate comprises at least one light incident surface, a first lateral surface and a second lateral surface opposite to the first lateral surface. The plurality of light guide elements are disposed at the first lateral surfaces. A plurality of cross-section parallel to the first light incident surface in the plurality of light guide elements. The farther the distance from the cross-section to the first light incident surface, the larger the area of the cross-section. After emitting from the light emitting unit, the light is guided by the plurality of light guide elements, and emitted from one of the first and the second lateral surfaces of the light guide plate.

Abstract: A light guide plate includes an optically effective portion and an optical coupling portion adjoining the optically effective portion. The optically effective portion includes a first bottom surface, a light output surface opposite to the first bottom surface, and a side surface connected between the first bottom surface and the light output surface. The optical coupling portion includes a second bottom surface, a first light incident surface opposite to the side surface, a second light incident surface, a first connecting surface, and a second connecting surface. The second bottom surface is coplanar with the first bottom surface. The second light incident surface extends from the first light incident surface away from the side surface. The first connecting surface extends from the second light incident surface toward the side surface. The second connecting surface is connected between the first connecting surface and the light output surface.

Abstract: A spread illuminating apparatus includes: a light guide plate with an emitting surface, a plurality of optical sheets laminated on the emitting surface, a light-blocking member that defines an effective area of the emitting surface, a light source, and a frame for accommodating the above constituents. The plurality of optical sheets are formed such that a position of an edge of each optical sheet on the incident light surface side of the light guide plate is spaced farther apart from the incident light surface of the light guide plate as moving toward a top layer of the optical sheets counted from the emitting surface, and the light-blocking member is fixed to each optical sheet and extends from the incident light surface side of the light guide plate so as to cover a vicinity of the edges of the plurality of optical sheets.

Abstract: A liquid crystal display device has brightness uniformity at its front and lateral sides. The liquid crystal display device includes a reflection sheet reflecting light; an optical plate including a substrate for guiding light, a height-varying portion formed on one surface of the substrate, not facing the reflection sheet, and a prism pattern formed on the height-varying portion; and a plurality of light sources arranged on one lateral surface of the optical plate in a first direction so as to correspond to a position of the height-varying portion having a height not greater than an average height from the one surface of the substrate to the height-varying portion. The prism pattern extends in a second direction substantially perpendicular to the first direction. The average height is in a range of about 0.1% to about 10% of the thickness of the substrate.

Abstract: A display apparatus includes a light source, a display panel and an optical plate between the light source and the display panel. The optical plate includes a supporting sheet, a first, a second and a third optical layer. The first optical layer is disposed on a bottom surface of the supporting sheet and has a plurality of first protruding portions on a bottom surface of the first optical layer and has a first refractive index. The second optical layer is disposed on the bottom surface of the first optical layer and covers the first protruding portions. The second optical layer has a second refractive index larger than the first refractive index. The third optical layer is disposed on a top surface of the supporting sheet and has a plurality of second protruding portions on a top surface and has a third refractive index smaller than the second refractive index.

Abstract: An illuminating device includes one or more light sources that output light, a translucent light guide member having one or more side surfaces and a light output surface, and a lens sheet positioned over the light output surface of the light guide member and including a first array of lenses and a second array of lenses extended in directions intersecting each other. The light source is positioned to have an optical axis substantially in agreement with a normal direction of the side surface of the translucent light guide member, and the first array or the second array of the lenses which is extended in a direction substantially orthogonal to the optical axis of the light source has a surface area in a range of from 20% to 50% with respect to a total surface area of the first and second arrays of the lenses.

Abstract: A color filter comprises a first filter element and a second filter element. The first filter element includes a plurality of arrayed filter regions allowing a first spectral component of incident light to pass and reflecting other spectral components of the incident light. The second filter element includes a plurality of arrayed filter regions allowing a second spectral component of the incident light to pass and reflecting other spectral components of the incident light. The center of the filter regions of the second filter element is deviated from the center of the filter regions of the first filter element so that the light reflected from the first filter element can pass through the second filter element. Thereby is enhanced the energy efficiency of the color filter. An edge-type backlight module using the abovementioned color filter is also disclosed.

Abstract: A light guide plate includes an incident surface on which light outputted from point light sources is incident and an outgoing surface for outputting light incident from the incident surface, wherein a reflection-and-propagation surface for reflecting light toward the outgoing surface is formed in a back surface opposite to the outgoing surface. The outgoing surface is made up of a propagation region adjacent to the incident surface, a diffusion-and-propagation auxiliary region adjacent to the propagation region, and a diffusion-and-propagation region adjacent to the diffusion-and-propagation auxiliary region. Hot spots and bright/dark lines in vicinities of the incident surface are controlled primarily by curved portions of prism upper ends formed in the diffusion-and-propagation region, and viewing-angle characteristics of the light guide plate are controlled primarily by linear portions of the prisms.

Abstract: A backlight device (10) includes a chassis (11), reflective sheets (16L and 16R) on the surface of the chassis, and an edge-lit light guide plate (13) on the reflective sheets. The two reflective sheets cover the chassis. Adjacent edges of the reflective sheets overlap each other, and a housing portion (17) to house the overlapping portion of these adjacent edges is formed in the chassis.

Abstract: A light emitting device includes a light source, a light guide plate, a diffusion sheet, and a lens. The light source is configured to perform partial light emission. The light guide plate is configured to guide light from the light source. The diffusion sheet is stacked over the light guide plate with a gap defined between the light guide plate and the diffusion sheet, and is configured to diffuse the light guided by the light guide plate. The lens is stacked on the diffusion sheet and has an upper surface serving as a light emitting surface.

Abstract: A backlight module includes a light guide plate, a number of point light sources, and a prism sheet. The light guide plate includes a light incident surface and a light emitting surface perpendicularly connected with the light incident surface. The point light sources are positioned in front of the light incident surface. The light guide plate includes first microstructures, such as a matrix of grooves. on the light emitting surface. The prism sheet is positioned in front of the light emitting surface and includes a first surface arranged substantially parallel with the light emitting surface and a second surface opposite to the first surface. The prism sheet includes second microstructures, such as triangular prisms parallel with an intersection line of the light incident surface and the light emitting surface, on the first surface.

Abstract: The invention provides a lighting unit comprising a waveguide for providing first light (111) having a first spectral distribution and second light (121) having a second spectral distribution emanating from a waveguide (100) in different directions, wherein the first spectral distribution and second spectral distribution differ. For instance, the first light (111) and the second light (121) have different color temperatures.

Abstract: A backlight module includes a reflector, a light guide plate and a film. The reflector includes a supporting plate and two extending portions, and the extending portions are located on two opposite sides of the supporting plate, respectively. The film includes a main body and two positioning portions, and the positioning portions are located on two opposite sides of the main body, respectively. The light guide plate is located between the supporting plate and the main body. The main body corresponds to the supporting plate, and the positioning portions correspond to the extending portions. The extending portions are bent toward the main body, and the positioning portions are bent toward the supporting plate. The positioning portions are at least partially overlapped with and are fixed to the extending portions, respectively.

Abstract: A backlight assembly includes a light source part, a base substrate, an insulation layer, and a reflection layer. The base substrate includes a light incident surface into which the light from the light source part is incident, and a light exiting surface adjacent to the light incident surface and through which the light exits. The insulation layer is formed on the light exiting surface of the base substrate. The reflection layer is formed on the insulation layer and forms a concave pattern along with the base substrate and the insulation layer and has an opening portion through which the light exiting from the light exiting surface passes.

Abstract: Dual-sided optical films have extended split spreading structures formed on one major surface, and extended prisms formed on an opposite major surface. One portion of each split spreading structure has a low light spreading characteristic, and another portion has a high light spreading characteristic. For each split spreading structure, the low light spreading portion may be disposed alongside the high light spreading portion. The split spreading structures may be arranged in a one-to-one correspondence with the prisms. Light that enters a given prism from one inclined surface thereof can be associated primarily with light transmitted through the low light spreading portion of the split spreading structure, and light that enters the given prism from the other inclined surface thereof can be associated primarily with light transmitted through the high light spreading portion.

Abstract: An illuminating device capable of stably illuminating an irradiated object such as a document while suppressing light loss with a simply structure is provided. An LED array and a reflective plate are disposed sandwiching a slit (St) through which light reflected by a document MS passes and a light-guiding member is disposed on the side of the LED array. The light-guiding member includes a direct emission unit disposed between an illumination range y centered on a document reading position and the LED array and an indirect emission unit disposed between the reflective plate and the LED array, a light incidence face of the direct emission unit and a light incidence face of the indirect emission unit are disposed at mutually different position around the LED array, and the LED array is disposed on a side of an interior angle formed by the light incidence faces.

Abstract: Dual-sided optical films have extended prisms formed in one major surface, and extended lenslets formed in an opposite major surface. Some or all of the prisms are compound prisms, in which the two inclined surfaces of each compound prism each include a tip portion, a base portion, and an intermediate portion disposed between the tip portion and the base portion, the intermediate and tip portions forming a concave shape and the intermediate and base portions forming a convex shape, or vice versa. When obliquely incident light, e.g. from a light guide, is incident on the prism side of the film, an output beam emerges from the lenslet side of the film. The output beam has an intensity distribution with a sharp left beam edge and a sharp right beam edge, these beam edges having 10%-to-90% transition angles of no more than 7, 6, 5, 4, 3, or 2 degrees.

Abstract: In embodiments of a transparent display backlight assembly, a backlight panel is operable as a transparent panel, and a light source generates light that the backlight panel directs from the light source to illuminate a display panel of a display device. Light refraction features refract and scatter the light, where the light refraction features are spaced for approximate transparency of the backlight panel and to illuminate the display panel. An active diffuser can be implemented as an additional transparent panel and operable for activation to diffuse the light from the backlight panel that illuminates the display panel.

Abstract: A display includes a reflective display module, a light guide plate, at least one light source and a cover lens. The light guide plate includes a first light guide surface opposite to the reflective display module. The first light guide surface includes a light outgoing region and a peripheral region surrounding the light outgoing region. The light source is used for emitting a light to the light guide plate. The peripheral region of the first light guide surface is connected to the cover lens. The light outgoing region and the cover lens are spatially separated, and define an air gap therebetween.

Abstract: The present invention provides a side-light backlight module with assisting solar light source and which comprises a side-light source; a waveguide having an incident surface facing the side-light source and an emitting surface; an optical film set arranged on top of the waveguide and facing the emitting surface; and an assisting light source directing collected solar light into the incident surface of the waveguide. With the provision of the assisting light source, the solar light can be used as an assisting light source making the backlight module and the liquid crystal display device made therefrom become more environmental friendly.

Abstract: A lighting assembly includes a light guide having opposed major surfaces between which light propagates by total internal reflection, a light input edge, and two light output regions of different optical characteristics and at least one of which is associated with a corresponding one of the major surfaces. The lighting assembly also includes a light source located adjacent the light input edge. The light source and the light guide variably positionable relative to one another to vary a location on the light input edge at which the light is input to the light guide such that the light is emitted from the light guide selectively apportioned between the light output regions so that a characteristic of the light output from the lighting assembly is modified based on the optical characteristics associated with the light output regions and the relative positioning of the light source and the light guide.

Abstract: A lighting fixture that includes a frame, a heat sink assembly, an LED assembly, and a reflector. The frame includes a first end plate and a second end plate, each end plate including a slot formed therein. The slot extends from a top edge of the end plates towards a bottom edge of the end plates. The heat sink assembly includes one or more LEDs and a lightguide having a first longitudinal edge that receives light emitted from the LEDs. A first edge and a second edge of the lightguide are slidably inserted respective slots. The heat sink assembly includes a heat sink base and a heat sink cap coupled thereto which forms a first cavity for housing the LEDs and a second cavity adjacent the first cavity for housing a portion of the lightguide. The reflector is coupled to the end plates.

Abstract: A backlight module and a liquid crystal display device having the same are provided. The backlight module includes a light guide plate, a light source, a shading sheet and at least one reflecting sheet. The light guide plate has a first face, a second face corresponding to the first face and a lateral face connected to the first face and the second face, and a light gathering structure is formed at least on the first face. The light source includes a light emitting device and two power source legs, and the light emitting device is detachably attached to the light guide plate. The shading sheet is attached to the first face. The at least one reflecting sheet is attached to the lateral face.

Abstract: Optics are provided for use in illumination devices the optics having a light guide, a redirecting layer including a plurality of lenses, and a plurality of reflector elements. Light from a light source enters the light guide and is guided therein until it escapes into a reflector element, which reflects at least some of the light received by the reflector element toward a corresponding lens for emission from the illumination device.

Abstract: An edge lit lighting device including a housing, a power circuit, a light source, and an optic. The power circuit may be carried by the housing, and adapted to form an electrical connection with an external power source. The light source may be carried by the housing and electrically connected to the power circuit. The optic may be carried by the housing and positioned in optical communication with the light source. The optic may further include a receiving surface positioned adjacent to the light source, and first and second emitting surfaces. The first emitting surface may include a plurality of features configured to redirect light defined as redirected light in a direction of the second emitting surface, the redirected light being emitted from the second emitting surface. The lighting device may further include pluralities of optics of light sources.

Abstract: A backlight module includes a light emitting unit for emitting light, a light guide plate disposed on a side of a display panel for guiding the light emitted by the light emitting unit to the display panel, a back cover installed outside the light emitting unit and the light guide plate, and a frame combined with the back cover for accommodating the light emitting unit and the light guide plate with the back cover. The frame includes a first side facing a surface of the light guide plate, and a second side opposite to the first side. The backlight module further includes an optical material layer disposed between the second side of the frame and the display panel for misting and focusing the light refracted from the light guide plate so as to provide uniform and bright light to the display panel.

Abstract: A computer bezel includes a bezel body, a light-guide structure mounted to the bezel body, and one or more light sources mounted on the bezel body. The light-guide structure includes a first bottom surface and a first end surface connected to the first bottom surface. The lighting portion includes an outer surface exposed out of the bezel body, a first side surface, and a second bottom surface connected to the guiding portion. A cross section of the light-guide structure is L-shaped taken along a plane substantially parallel to the first end surface. The guiding portion is configured to guide a plurality of light beams emitted from the light source to the lighting portion to enable the plurality of light beams to be refracted from the outer surface so as to be visible to a user.

Abstract: When constructing a nuclear detector module in a gantry, a plurality of overlapping light guide modules (10) are mounted to the gantry in a spaced-apart fashion, and a plurality of underlapping light guide modules (12) are mounted in between each pair of overlapping light guide modules (10). Each of the underlapping modules and the overlapping modules includes a scintillation crystal array (16) on an interior surface thereof, and a plurality of PMTs on an exterior surface thereof. Overlapping modules (10) have overlapping structures (22) that interface with underlapping structures (18) on the underlapping modules (12) and thereby eliminate a seam directly beneath PMTs that overlap the crystal arrays of both an overlapping module and an underlapping module. Optical grease is used to form a resilient grease coupling and reduce light scatter between the underlapping and overlapping modules.

Abstract: A computer bezel includes a bezel body; a light-guide structure mounted to the bezel body, and one or more light sources mounted on the bezel body. The light-guide structure includes a guiding portion and a lighting portion extending from the guiding portion. The lighting portion defines an outer surface exposed out of the bezel body. The guiding portion includes a first bottom surface and a first end surface connected to the first bottom surface. An obtuse angle is defined between the first end surface and the first bottom surface. The light source corresponds to the first end surface. The guiding portion is configured to guide a plurality of light beams emitted from the one or more light sources to the lighting portion to enable the plurality of light beams to be refracted from the outer surface so as to be visible to a user.

Abstract: A thin collimated backlight is provided for use in a monochrome liquid crystal display or a color liquid crystal display with color converting elements. The color converting elements are located on the opposite side of the liquid crystal panel to the backlight. The backlight is illuminated by narrow-band light sources such as single color LEDs. The backlight is formed by a lightguide, one or more conventional light controlling sheets and a polymeric filter sheet. The polymeric filter acts to: 1) reflect one polarization direction over the bandwidth of source at all angles of incidence and 2) reflect the orthogonal polarization direction over the bandwidth of the source only at high incident angles. Light in this orthogonal polarization passes through the filter when incident close to the normal to the filter sheet. Light reflected by the filter is efficiently recycled within the backlight.

Abstract: A directional display may include a waveguide. The waveguide may include light extraction features arranged to direct light from an array of light sources by total internal reflection to an array of viewing windows and a reflector arranged to direct light from the waveguide by transmission through extraction features of the waveguide to the same array of viewing windows. The brightness of the directional display can be increased. An efficient and bright autostereoscopic display system can be achieved.