Abstract: Provided is a backlight unit including: a substrate; a plurality of light-emitting devices mounted on the substrate; and an optical sheet disposed above the light-emitting devices, wherein the optical sheet is in contact with a light-emitting surface of at least one light-emitting device via one surface thereof, and emits light of the light-emitting device incident on one surface thereof to the other surface facing the one surface, while refracting or dispersing the light in a direction different from a direction in which the light is incident due to an optical pattern formed therein.

Abstract: A method of manufacturing a planar light source includes: providing a wiring substrate; locating a light guide plate on a first principal face of the wiring substrate, wherein the light guide plate includes a plurality of unit regions arranged in one dimension or two dimensions, and a plurality of through holes that are open at the a principal face and a second principal face of the light guide plate, wherein at least one of the through holes is located in the unit regions; locating light sources in the through holes in the unit regions on the first principal face of the wiring substrate; locating a first light transmissive member in a first of the through holes; and locating a second light transmissive member in the first through hole.

Abstract: A light modulator and method of forming the same is provided. The light modulator includes a membrane and a tuning electrode in spaced relation to the membrane. A light blocking fluid is received between the substrate and the tuning electrode and a light blocker is positioned between the tuning electrode and a central portion of the membrane. A pinning electrode is disposed between the light blocker and the membrane and is aligned with the central portion of the membrane. An electrostatic generator is configured to selectively apply an electrostatic force on the membrane causing the central portion of the membrane to deform towards pinning electrode causing the light blocking fluid to be displaced from between the membrane and the pinning electrode.

Abstract: Methods and systems are provided for a fairlead with an illumination module. In one example, a fairlead includes an illumination module seated against a recessed mounting surface. The illumination module is housed within a body of the fairlead and configured to illuminate a main opening of the fairlead.

Abstract: Systems, methods, and computer-readable media are disclosed for dual-color frontlit displays with near uniform color mixing. In one embodiment, an example device may include a light emitting diode (LED) array that includes a first LED that emits light having a first color and a second LED that emits light having a second color, and a light guide that includes a surface having a first portion adjacent to the first LED and a second portion adjacent to the second LED. The first portion may include a first number of binary element surface features formed on the surface, and the second portion may include a second number of binary element surface features formed on the surface.

Abstract: The invention provides a lighting device (1) comprising: —one or more light sources (10) configured to provide light source light (11); —a luminescent element (5) comprising an elongated luminescent body (100) having a radiation input face (111) for receipt of the light source light (11), the luminescent element (5) comprising a first luminescent material (120) for conversion of at least part of the light source light (11) into luminescent material light (8); —a light guide element (850), configured downstream of the first luminescent material (120), and configured to light guide at least part of the first luminescent material light (8); —a second luminescent material (1120), configured downstream of the first 10 luminescent material (120), at a first distance (d1) of at least 0.

Abstract: A backlight module and a display device are provided. The backlight module includes an optical film and a light source. The optical film includes a main body and optical structures. The main body has a light-emitting surface, an optical surface, a first side surface and a second side surface. The optical structures are disposed on the main body. Each of optical structures has a first surface and a second surface. The first surface is inclined relative to the optical surface. A first angle is formed between the first surface and the optical surface. The second surface is inclined relative to the optical surface, and a second angle is formed between the second surface and the optical surface. The first angles and the second angles are acute angles, and the first angles of the optical structures vary along a first direction from the first side surface to the second side surface.

Abstract: A light emitting module includes: a plurality of light emitting elements each having a primary light emitting surface and a lateral surface; a plurality of wavelength conversion members arranged respectively on the primary light emitting surfaces of the plurality of light emitting elements; and a lightguide plate having a first primary surface and a second primary surface and arranged continuously on the plurality of wavelength conversion members so that the second primary surface faces the plurality of wavelength conversion members, wherein the lightguide plate includes a plurality of recessed portions located on the second primary surface, and a lateral surface of at least one of the plurality of wavelength conversion members is partially in contact with an inner lateral surface of at least one of the plurality of recessed portions.

Abstract: A display device includes a display panel including first pads in a first row and second pads in a second row, a driving circuit board, a first connection circuit board including a first output portion on which first output pads bonded to the first pads of the display panel are disposed, a first input portion on which first input pads bonded to the driving circuit board are disposed, and a first protruding portion, and a second connection circuit board including a second output portion which overlap at least a portion of the first output portion and on which second output pads bonded to the second pads of the display panel are disposed, and a second input portion on which second input pads bonded to the driving circuit board are disposed. At least a portion of the first protruding portion is disposed on the second input portion.

Abstract: A light fixture includes an electronics housing, opposing connector assemblies and at least one light module. The electronics housing and the at least one light module are each supported by and extend between the opposing connector assemblies such that a gap is provided between the electronics housing and light module.

Abstract: A shelf illumination device that includes a label holder configured to hold a label and also configured for removable attachment to a front-facing end of a retail store shelf. The device includes a light bar having a plurality of light sources positioned along a length of the light bar, and with a handle attached to one end of the light bar. A carrier has a first flat portion that extends for a length at least as long the light bar. The carrier further includes a first projection and a second projection that together define an opening configured to hold the light bar. The carrier is configured for assembly to the label holder. A light-conducting member is sandwiched between the label holder and the carrier. The light-conducting member has an edge configured to receive light from a source and to conduct that light throughout the entire light-conducting member.

Abstract: A method for forming a light-transmissive member includes: a step (A) including locating a cured resin body having a principal surface and containing a silicone resin, and a die including a plurality of convex portions, such that the principal surface and the plurality of convex portions face each other, and pressing the die onto the principal surface of the resin body in a heated state to form a plurality of concave portions at the principal surface; and a step (B) including, after the step (A), irradiating the principal surface of the resin body with ultraviolet rays.

Abstract: A backlight module and a display apparatus are provided. The backlight module includes a film sheet, including a first opening and a second opening; and a light guide plate, including a first limit boss located within the first opening and a second limit boss located within the second opening. The second limit boss limits a position of the film sheet in a first direction; the first limit boss limits the position of the film sheet in a second direction. In the second direction, a first interval between is between a portion of the film sheet that forms the second opening and the second limit boss; and the portion of the film sheet that forms the second opening includes two first sidewalls opposite to each other in the first direction.

Abstract: A light emitting diode (LED) backlight module includes an LED light source, a quantum dot enhancement film, a diffuser plate, a blue light reflector, and a blue light filter and reflector. The LED light source includes a plurality of blue LEDs formed therein, the quantum dot enhancement film is excited by blue lights emitted by the blue LEDs to emit red lights and green lights, and the diffuser plate is disposed between the LED light source and the quantum dot enhancement film, and the blue light reflector is disposed on one side, opposite to the quantum dot enhancement film, of the diffuser plate to reflect a part of the blue lights reflected by the diffuser plate to the quantum dot enhancement film. In addition, the blue light filter and reflector is disposed between the diffuser plate and the quantum dot enhancement film.

Abstract: A method, comprising: providing a light emitting element including a semiconductor stack body and an electrode; providing a lightguide plate having a first surface and a second surface opposite to the first surface, wherein the second surface includes a plurality of recesses; arranging a light-transmitting member in each of the recesses; adjusting upper surfaces of the light-transmitting members to a uniform height; placing a wavelength conversion member on the light-transmitting member; placing the light emitting element on the wavelength conversion member with the electrode facing up; arranging a cover member that covers the light emitting element; removing the cover member until the electrode is exposed; and forming a wiring that electrically connects the light emitting elements together.

Abstract: A lamp for a vehicle includes a light source unit including at least one first light source for generating first light and at least one second light source for generating second light formed in a color different from a color of the first light, a light guide unit for guiding the first light and the second light incident through an incident member thereof, a transmission lens disposed between the first light source and the incident member of the light guide unit, through which the first light is incident and emitted, and an outer lens through which at least a portion of the first light and the second light guided by the light guide unit is transmitted. In particular, the color of the first light is changed by the transmission lens and is subsequently changed by the outer lens.

Abstract: An apparatus is disclosed including a light guide and a plurality of light emitting diodes (LEDs). The light guide includes a rear portion including a first edge, a second edge, and a rear edge. The first edge meets the rear edge at a first obtuse angle, and the second edge meets the rear edge at a second obtuse angle. The plurality of light emitting diodes (LEDs) disposed on the first edge, the second edge, and the rear edge, and it is arranged to produce an asymmetric light distribution pattern including a rear light emission and a forward light emission having a greater peak intensity than the rear light emission.

Abstract: The present application provides a backlight, a method for manufacturing a backlight, and a display apparatus. The backlight includes at least one lamp plate having a base substrate and a light source on the base substrate, the light source being configured to emit light having a first wavelength; a wavelength selection layer on a side of the light source away from the base substrate; and a wavelength conversion layer on a side of the wavelength selection layer away from the base substrate. The wavelength conversion layer is configured to emit light having a second wavelength under excitation of the light having the first wavelength. The wavelength selection layer is configured to transmit the light having the first wavelength through the wavelength selection layer and reflect the light having the second wavelength.

Abstract: A display device includes a display panel, a light source, an optical member, a rear chassis and a frame member. The light source is disposed on a rear side relative to the display panel. The optical member is disposed on the rear side relative to the display panel. The rear chassis houses the light source, the rear chassis including an outer peripheral portion with a flat component that extends outward relative to a center of the display device and a bent part that extends rearward from an outer edge of the flat component. The frame member is fastened to the bent part of the rear chassis with a fastening member.

Abstract: Embodiments of the present application provides a prism film, a light guide plate, a backlight module and a display apparatus. The prism film includes a sheet and an array of prisms arranged on a side of the sheet and vertex angles of the prisms in the array increase or decrease in magnitude sequentially from one end of the array of prisms to the other end of the array opposite to the one end.

Abstract: Embodiments may utilize a series of exposed fins, which increase the surface area of the heat sink creating additional air flow. As hotter air rises within the system, cooler is drawn into the heatsink. The fins may be exposed on both sides of the longitudinal axis, allowing cooler air to be drawn towards the longitudinal axis above the heatsink and flow upward. This process may cool the fins. Additionally, the spacing between the fins may have to be wide enough to allow for air to freely enter the heatsink.

Abstract: A LED light source includes a longitudinally extending light guide having a longitudinally extending light emitting face having a length, a first end face and a longitudinally spaced apart second end face. A LED light source is provided at least at the first end face. The light emitting face has a plurality of light emitting locations provided thereon. The density of the light emitting locations increases from the first end face towards the second end face.

Abstract: Disclosed is a micro-lens imaging multi-well test plate which comprises: a transparent plate of 3-5 mm in thickness with one or more trapezoidal wells locating in the middle of the plate, each of the wells is of an underside of 2-4 mm in diameter, 0.2-0.5 mm in thickness, a trapezoidal dip angle of 60-75°, and has a micro-lens which upper half is hemispherical, lower half is a cylinder, with radius of 0.1˜1.0 mm, height of 0.2˜2.5 mm, molded on the bottom of the well. The micro-lens imaging multi-well test plate is made of homogeneous optical transparent materials. When the trapezoidal concave wells of the test plate are filled with fluid to immerse the micro-lens, under parallel light illumination, due to the refraction effect of light, the image of micro-lens is a round one with an outer edge that is a black ring.

Abstract: In one aspect, a light emitting device comprises a lightguide formed from a film, a plurality of strips of the film extended from a lightguide region of the film, each strip is folded and stacked such that the strips of the plurality of strips are parallel to each other and ends of the strips of the plurality of strips define a light input surface, light extraction features defining a light emitting region of the film, and at least one light source emitting light into the light input surface, the light propagating through the strips and the lightguide region by total internal reflection where it is directed by the light extraction features to emit a first light flux and the light from the at least one light source has an average light flux density in a cross-section of the light emitting region of the film greater than 100 lumens per square millimeter.

Abstract: A method for manufacturing a linear light emitting device includes: providing a light transmissive member having a long side and a short side in a plan view; mounting a plurality of light emitting elements on the light transmissive member via a light transmissive adhesive, such that the light emitting elements are arranged in a row along the long side of the light transmissive member; and forming a reflective member that covers the light transmissive adhesive and lateral faces of the light emitting elements. The linear light emitting device has an emission face having a long side and a short side in a plan view, and a length of the short side of the light transmissive member is substantially equal to a length of the short side of the emission face of the linear light emitting device.

Abstract: A backlight unit and a display device including the same are provided. The backlight unit includes: a frame; a reflection sheet located on the frame; a housing coupled to at least one side of the frame; a substrate located on the housing; a light assembly mounted on the substrate; and a light guide plate located opposite to the light assembly on the reflection sheet, wherein the housing is exposed to the outside of the frame. Therefore, as the housing is exposed to the outside of the frame, even if a problem occurs in a light assembly, by separating only the housing, the problem can be solved, and the housing is exposed to the outside of the frame to enhance a heat releasing effect.

Abstract: A light emitting assembly comprising: a light emitting structure with a first light emission surface comprising one or more point-like light sources to emit light; a transparent beam shaping structure comprising a second light emission surface and a second light receiving surface, wherein the second light receiving surface is arranged at a distance above the first light emission surface to create an air gap to receive light emitted from the light emitting structure within an acceptance angle ? for the beam shaping structure to shape a resulting beam of light being emitted through the second light emission surface; and one or more transparent light guiding elements arranged between the beam shaping structure and the light emitting structure suitably shaped to refract at least part of the light emitted from the first light emission surface under an emergent angle ? larger than the acceptance angle ? towards the beam shaping structure.

Abstract: In one aspect, a light fixture for illuminating an environment below a ceiling tile comprises a lightguide formed from a film including folded and stacked strips extending from a lightguide region of the film. In one aspect, the film comprises light extracting features defining one or more light emitting regions that extract light from at least one light source positioned to emit light into the stacked end of strips. In another aspect a region of the film between the one or more light emitting regions and the strips comprises a bend or fold such that when the film is positioned between the ceiling tile and a ceiling tile rail support with the one or more light emitting regions of the film positioned below the ceiling tile, the at least one light source is positioned above the ceiling tile or above the ceiling tile rail support.

Abstract: A headlamp (1) for a vehicle, comprising at least one light source (2), a primary optical system (3) for generating a lighting image, and an optical imaging system (4), wherein the lighting image can be projected onto the roadway as a light image by means of the optical imaging system (4), and the primary optical system (3) has a plurality of light guiding elements (5) and a support layer (6), wherein the light guiding elements (5) are arranged on a rear face (6r) of the support layer (6), and the lighting image can be generated on a front face (6v) of the support layer (6), the light guiding elements (5) are arranged adjacently to one another or in an overlapping manner in a row in an axis direction (y) and form at least one line (7), wherein each light guiding element (5) has a light inlet surface (5e) for coupling in light from at least one light source (2) and a light outlet surface (5a) for coupling out light, wherein the totality of the light guiding elements (5) of the at least one line (7) have a comm

Abstract: An image projection image for projecting an image on a screen includes a light source, a scanning mirror and a prism. The light source includes laser diodes for emitting beams of different wavelengths. The scanning mirror reflects the beams radiated from the light source and projects the reflected beams. The prism is disposed at the rear of the scanning mirror to decenter the beams via the scanning mirror based on the wavelengths. In the image projection apparatus, the laser diodes are fixed to be vertically spaced apart from a reference height, corresponding to the wavelengths of the beams.

Abstract: A lighting device (1) comprises at least one light source (3) and at least one optical element (5). The optical element (5) may be arranged to transmit light emitted by the light source (3). The optical element (5) comprises a light transmissive material (7) and at least one passage (9) extending through the light transmissive material (7) for allowing a flow of fluid through said optical element (5). The passage (9) is arranged such that a major portion of the light (16) emitted by said light source (3) entering the passage (9) further propagates through the light transmissive material (7). The optical element (5) comprises a plurality of layers (18) of the light transmissive material (7) spaced apart from each other, each layer comprising at least one through-hole (11).

Abstract: A light guide unit according to an embodiment of the present invention includes: a light guide plate having a light outgoing surface and a light reflecting surface, the reflecting surface being opposite to the light outgoing surface; a reflection sheet disposed facing the reflecting surface of the light guide plate, and a plurality of light scattering units provided between the light guide plate and the reflection sheet, the plurality of light scattering units being apart for one another along the light reflecting surface, wherein each of the plurality of light scattering units includes a scattering layer and a reflection layer formed on the scattering layer, the scattering layer being fixed on the light reflecting surface.

Abstract: A light guide heat dissipation module includes a first heat dissipation member, a second heat dissipation member, a light guide member, and a light source assembly. The first heat dissipation member includes an opening. The second heat dissipation member is thermally coupled to the first heat dissipation member. The light guide member is disposed between the first heat dissipation member and the second heat dissipation member. The opening of the first heat dissipation member exposes a portion of the light guide member. The light guide member includes a light incident surface. The light source assembly includes a light source and a pad electrically connected to the light source. The light source is disposed beside the light incident surface of the light guide member. The pad is disposed on a bottom surface of the second heat dissipation member away from the first heat dissipation member. An electronic device including the light guide heat dissipation module is further provided.

Abstract: A display may have a backlight unit with a row of light-emitting diodes that emit light into the edge of a light guide plate. The light guide plate may have opposing upper and lower surfaces. Backlight may be extracted from the light guide plate using an array of bumps on the lower surface and ridges on the upper surface. Ridge density may vary as a function of location across the display. Some of the ridges may be terminated along a meandering border between regions of differing ridge density. Ridge length and endpoint location can be dithered along borders between regions and ridge widths and thicknesses may be tapered down towards the endpoints. Ridges may be patterned to reduce the density of the ridges immediately adjacent the light-emitting diodes and thereby avoid over-extraction of the light at the light-emitting diodes.

Abstract: In one aspect, a light emitting device comprises a film-based lightguide including folded and stacked strips extending from a lightguide region of the film. In one aspect, the film comprises light extracting features defining light emitting regions that extract light from at least one light source positioned to emit light into the stacked end of strips. The light emitting device may include a light reflecting layer physically coupled to the light emitting device, laminated to a layer of the film, or printed onto a layer of the film proximate the light emitting region of the film. The light emitting device may also include a fastener configured to attach the light emitting device to a wall or ceiling.

Abstract: The display device comprises a display panel, a light source, an optical plate being arranged to face the display panel and diffusing or guiding the light from the light source, and an optical sheet arranged on one surface of the optical plate, and further comprises a pressing part pressing an edge of the optical sheet, and a facing part coordinating with the pressing part and having a facing surface facing an end surface of the optical plate. The facing surface is slanting so that the distance between the facing surface and the end surface decreases toward the display panel.

Abstract: An electronic device and a display device are provided. The electronic device includes the display device and an object to be shown. The display device includes a display panel, a first backlight module, and a second backlight module. The display panel has a transparent area corresponding to the object. The first backlight module is disposed with a gap to the display panel and generates first backlight to reach the display panel. The second backlight module has a prism sheet and a collimated illumination. The prism sheet is parallel to the display panel and corresponding to the transparent area, while the collimated illumination generates light reaching the prism sheet. The light is orientated by the prism sheet and becomes a second backlight before entering the transparent area.

Abstract: The display device comprises a display panel, a light source, an optical plate being arranged to face the display panel and diffusing or guiding the light from the light source, and an optical sheet arranged on one surface of the optical plate, and further comprises a pressing part pressing an edge of the optical sheet, and a facing part coordinating with the pressing part and having a facing surface facing an end surface of the optical plate. The facing surface is slanting so that the distance between the facing surface and the end surface decreases toward the display panel.

Abstract: A display device includes a first display panel, a second display panel disposed to be spaced apart from the first display panel, a first light guide plate which is under the first display panel and provides light thereto, a second light guide plate which is under the second display panel and provides light thereto, a light source unit which is commonly disposed under the first and second light guide plates and generates and provides the light to the first and second light guide plates, and a reflective member which is disposed on the light source unit and is commonly disposed on the first and second light guide plates, the reflective member defining a first curved surface which reflects the light to the first light guide plate and a second curved surface which reflects the light to the second light guide plate.

Abstract: A backlight unit of high light coupling efficiency including a light guide plate, a first light source component and a second light source component disposed beside two neighboring side walls of the light guide plate, and a heat dissipation element that contacts a first substrate of the first light source component and a second substrate of the second light source component simultaneously and is disposed on a bottom of the light guide plate. The backlight unit of the present disclosure can effectively dissipate heat generated during the operation of the light source components, thereby avoiding the mura phenomenon caused by a change of a light coupling distance due to the expansion of the light guide plate because of overheating.

Abstract: A LED panel light comprises an optical layer structure, including a top side, a bottom side and an edge and at least two substantially plate-shaped layers arranged on top of one another, and further comprises LEDs as light source, the LEDs being arranged at the edge of the layer structure and radiating light into the layer structure at the side, and further comprises a housing frame and at least one seal. The seal encloses the LEDs and the edge of the layer structure, the seal being in contact with the top side and the bottom side of the layer structure and resting against or on the housing frame so the seal seals the layer structure against the housing frame, the housing frame and the layer structure being clamped relative to one another such that the seal is pressed against the top side and the bottom side of the layer structure.

Abstract: In one aspect, a light emitting device comprises a film-based lightguide including folded and stacked strips extending from a lightguide region of the film. In one aspect, the film comprises light extracting features defining light emitting regions that extract light from at least one light source positioned to emit light into the stacked end of strips. In one aspect, a flux of light emitted in a first direction by the light extracting features is greater than 70% of a total flux emitted from the light emitting regions, the light emitting regions have an average luminous transmittance greater than 70%, and the outermost surface of the device has an ASTM D523-89 60 degree gloss less than 50 gloss units. In one aspect, the device is a light fixture and the color of the object, such as a wall or ceiling, behind the film is unchanged when looking through the film.

Abstract: A lighting assembly 100, a lamp and a luminaire are provided. The lighting assembly 100 comprises a light exit window 114, a light source 110 and a partially light transmitting reflector 102. The light source 110 emits light in at least a first narrow band of the visible spectrum towards the light exit window 114. The partially light transmitting reflector 102 is arranged at the light exit window 114 and reflects substantially all light of the visible spectrum except in at least the first narrow band of the visible spectrum. The partially light transmitting reflector is light transmitting in the first narrow band.

Abstract: A wall-mounted keypad may include a light detector circuit located inside the keypad that is configured to measure an ambient light level in a space. The light detector circuit may receive ambient light through an aperture that is hidden from view by the keypad. The keypad may include a reflector for directing ambient light onto the light detector circuit. The keypad may include an enclosure that houses the light detector circuit. The enclosure may define a recess that exposes at least a portion of the light detector circuit. The enclosure may include a reflector that may focus ambient light received through the aperture onto the light detector circuit. The keypad may include a control circuit that may be configured to illuminate the indicia of respective buttons of the control device in response to actuations of the one or more buttons, in accordance with the measured ambient light level.

Abstract: An illumination apparatus for a winch configured to engage a retractable cord is disclosed. The illumination apparatus comprises a light source configured to emit an excitation emission at a first wavelength. The excitation emission is configured to activate an illumination of at least a portion of the retractable cord. A first photoluminescent portion is disposed on the retractable cord and configured to emit a first output emission having a second wavelength different from the first wavelength in response to receiving the excitation emission. The first photoluminescent portion may serve as a marker or visible notification of a position or portion of the retractable cord.

Abstract: A solid state illumination system is provided as a replacement for conventional arc light, metal halide and Xenon white-light sources for applications in microscopy, fluorescence microscopy, and endoscopy. The solid state illumination system generates high quality white light output from LED light sources. The white light output is continuous in the visible spectrum from 380 nm to 650 nm and is suitable for imaging all the most common fluorophores and fluorescent proteins. In embodiments, an LED light pipe engine is used to generate a portion of the spectral content of the white light output.

Abstract: A light unit is provided. The light unit includes a PCB mounted with a plurality of LEDs, and a light guide member having a plurality of reception grooves piercing therethrough and receiving the LEDs, wherein the light guide member includes one surface and the other surface opposite to the one surface, and the one surface of the light guide member is further coated with the resin material. The reception grooves are formed in the light guide member and are filled with a fluid resin material, thus preventing the damage to the LED caused by the difference between the thermal expansion rates of the components such as the light guide member, the reflection film and the PCB.

Abstract: Provided is a light-emitting unit that includes: a light-guide section having a light entering surface; and a plurality of light sources opposed to the light entering surface of the light-guide section and arrayed in a first direction, and each having an anisotropy in emission intensity. A pattern shape of light applied from any of the light sources to the light entering surface has a shape anisotropy, and the light sources are each disposed to allow a longitudinal direction of the pattern shape to be inclined relative to the first direction.

Abstract: A backlight unit 12 includes a light guide plate 16, first LEDs 17A, second LEDs 17B, first support members 28, and second support members 29. The first LEDs 17A are opposed to a first light entrance surface 16nA that is a first edge surface 16E1 of the light guide plate 16. The second LEDs 17B are opposed to a second light entrance surface 16bB that is a second edge surface 16E2 of the light guide plate 16. The second LEDs 17B are arranged to be away from the second light entrance surface 16bB with a distance B relatively greater than a distance A between the first LEDs 17A and the first light entrance surface 16bA. The first support members 28 are in contact with the first edge surface 16E1 of the light guide plate 16 to support the light guide plate 16 from a first LED 17A side. The second support members 29 are arranged on a same side as the second LEDs 17B with respect to the light guide plate 16 to be away from the light guide plate 16.

Abstract: LED dies are suspended in an ink and printed on a first support substrate to form a light emitting layer having a light emitting surface emitting primary light, such as blue light. A mixture of a transparent binder, phosphor powder, and transparent glass beads is formed as an ink and printed over the light emitting surface. The mixture forms a wavelength conversion layer when cured. The beads are preferably sized so that the tops of the beads protrude completely through the conversion layer. Some of the primary light passes through the beads with virtually no attenuation or backscattering, and some of the primary light is converted by the phosphor to secondary light. The combination of the secondary light and the primary light passing though the beads may form white light. The overall color is highly controllable by controlling the percentage weight of the beads.