Abstract: A backlight module has a light guide plate, a back plate and light emitting assemblies. The light guide plate is substantially prism-like. The back plate has a shape corresponding to that of the light guide plate, and has an inclined first side plate and an inclined second side plate opposite to the first side plate. Each of the first and second side plates has at least one receiving recess, and the light emitting assemblies are received in the receiving recesses. In comparison with a side-light type backlight module, the present invention saves a heat-dissipation aluminum extrusion member. In comparison with a direct-light type backlight module, the present invention shortens the light mixing distance in a vertical direction, so as to reduce the module thickness.

Abstract: An electronic device includes a base having two opposite sidewalls, two carriers connected pivotally and respectively to the sidewalls, and two light guide plates respectively disposed on the carriers. The carriers are rotatable relative to the base between a first position, where the carriers cooperatively define a carrier surface, and a second position, where the carriers are parallel to each other. A flexible screen is superposed on the light guide plates, is expanded to a planar state when move along with the carriers to the first position, and is folded when move along with the carriers to the second position.

Abstract: A spread illuminating apparatus includes a point-like light source, and a light guiding plate with a light incident face at which the point-like light source direct and an emission surface that exits spread illuminated light emitted from the point-like source and then introduced through the light incident face. A pair of inclined surfaces is provided between the adjacent point-like light sources arranged at the light incident face, the inclined surfaces being configured to incline and narrow as moving toward a front of the light guiding plate in a light emitted direction.

Abstract: Lightguides are disclosed. More particularly, lightguides that include a lightguiding layer and a light extracting layer having a structured surface are disclosed. The light guiding layer is optically coupled to a first set of structures of the structured surface at given locations, and is not optically coupled to a second set of structures at given locations, thereby producing total internal reflection at the second locations. The selective optical coupling may be achieved by a number of different contemplated means as discussed herein. The lightguides allow for distribution of light along with redirection towards an image viewer without a number of commonly required optical elements in backlights.

Abstract: A light guide plate includes a light incident surface, a light exit surface; and a bottom surface opposite the light exit surface. The light incident surface includes many first micro structures and many second micro structures. Each second micro structure cover some of the first micro structures.

Abstract: A spread illumination apparatus includes: a light source; and a light guide plate having a light entrance surface on which the light source is disposed, and a light exit surface through which light introduced from the light entrance surface is emitted, wherein the light guide plate includes a light entrance wedge portion which has an inclined surface and of which thickness is thinner from the light entrance surface side toward the light exit surface side, the inclined surface includes a first, a second, and a third inclined surface portions, and an average inclination angle of the second inclined surface portion at an arbitrary cross section perpendicular to the light entrance surface and the light exit surface along the light entrance surface in a longitudinal direction is configured to be larger than average inclination angles of the first inclined surface portion and the third inclined surface portion.

Abstract: A light-emitting module includes a light guide plate and a light source unit in accordance with an embodiment. The light guide plate include an upper surface, a lower surface facing the upper surface, a plurality of side surfaces connecting the upper surface and the lower surface, and a cross-sectional surface connected to at least one of the side surfaces. The light source unit includes a substrate disposed in correspondence with the cross-sectional surface and a point light source mounted on the substrate to emit light to the cross-sectional surface. Thus, light-emitting efficiency may be enhanced and the arrangement of point light sources may be optimized, so that a required amount of emitted light may be obtained using a small number of the point light sources. In addition, uniformity of luminance and heat-radiating efficiency may also be enhanced.

Abstract: A display device (100) includes: a display panel (110) having a display area where an image is displayed; a light guide member (150) that has an inner side face (150a) set at an 80 to 110° angle ? to the surface of the display panel (110) and that guides light from the periphery of the display panel (110) to outside of the display area; and a mirror (160) that covers the inner side face (150a) of the light guide member (150).

Abstract: Disclosed is a backlight unit in order to suppress an increase of time needed for manufacture and generation of operation variance, and furthermore, to suppress deterioration and unevenness of luminance of output light. A plurality of transparent light guide plates (5), which are disposed in a chassis (4) in the lateral direction, and which output light emitted from a light source (7), are provided with a fixing protruding section (51) which is to be pressed by a fixing member (6), and an outputting section (52), which outputs planar light. The outputting section (52) is provided with, when viewed from the front, an extending section (53) which extends to cover at least a part of the fixing protruding section (51).

Abstract: An optical arrangement comprising a light guide (101) having a light-entry portion (103) with a light-entry surface (105), a tapering portion (107) with a light reflecting surface, and a light-exit surface (109). The light-entry portion (103) is arranged to guide light from the light-entry surface (105) in a first direction (x) towards the light reflecting surface (H I), the light reflecting surface being arranged in relation to the first direction (x) so that incident light from the light-entry portion (103) is reflected towards the light-exit surface (109). A light transmitting layer (113) is adapted to transmit light diffusively and arranged to cover at least a portion of the light-entry edge surface (105) of the light guide (101). The arrangement is e.g. suitable for use in a LED based luminaire and allows for efficiency and forming of a light beam able to fulfill glare requirements. The arrangement may advantageously be used in a downlighting application.

Abstract: The utility model relates to a technology field of liquid crystal display, and more particularly to a backlight module and a backlight device. The backlight module provided by the utility model comprises a light guide plate, a printed circuit board, a heat-dissipating bracket and a first retaining member. There has an optical-coupling distance between a light incidence surface of the light guide plate and the printed circuit board. The light incidence surface of the light guide plate disposes more than two light guide plate protrusions thereon. The first retaining member retains the heat-dissipating bracket, the printed circuit board and the light guide plate together to form an independent module. The technical solution of the utility model can enhance the stability of the optical-coupling distance in the backlight module, realize a simple modularization assembly, simplify a mounting process of the back plate, and improve the assembly convenience.

Abstract: A light guide element and a light source device using the same are provided. The light guide element has a main body. The side surface is located between the bottom surface and the light-emitting surface. The bottom surface is opposite to the light-emitting surface. The main body has a hollow portion with a cone shape. The cone-shaped hollow portion has a bottom portion and a top portion. The bottom portion is located on the bottom surface of the main body, and has a first hollow cross section area. The top portion is opposite to the bottom surface, and has a second cross section area smaller than the first cross section area. The light source device includes the light guide element and a light emitting diode (LED). The LED is used to emit light into the cone-shape hollow portion through the bottom portion.

Abstract: In one embodiment of this invention, a device comprises an arcuate lightguide with an arcuate light emitting surface and light extracting features wherein the arcuate light emitting surface intersects the optical axis of a light source when disposed on the input edge of the lightguide. The light emitting surface of the lightguide may be in the shape of a elliptic paraboloid or parabolic cylinder or tapered. In another embodiment of this invention, a device comprises an arcuate lightguide wherein the wherein the ratio of the sagittal depth of the lightguide to the thickness of the first input edge is greater than 2. In another embodiment of this invention, the device is a light emitting device comprising the aforementioned lightguide and a light source.

Abstract: In one embodiment, the invention provides backlight comprising a front reflector (102) and a back reflector (104) disposed to form a hollow light cavity (106) with a first light source (108) proximate one end of the front reflector (102) and having a tilt angle (110) of from 5° to 90°, and a first asymmetric light collimator (116) extending between at least the first light source (108) and the back reflector (104) for directing light from the first light source (108) into the hollow light cavity (106).

Abstract: The invention relates to an illumination system (10), a luminaire (102), a collimator (30) and a display device (200). The illumination system according to the invention comprises a light source (20) and the collimator. The light source is configured for emitting a substantially Lambertian light distribution around a symmetry axis (22). The refractive collimator is configured for redirecting light from the light source to at least partially illuminate an illuminating surface (50) in which at least a part of the illuminating surface being substantially parallel to the symmetry axis. The refractive collimator comprises a concave input window (34) and an at least partially convex output window (40) for refracting light towards the illuminating surface. The effect of the illumination system according to the invention is that a height of the illumination system may be reduced due to the use of the refractive collimator.

Abstract: Provided is a surface light emitter that supplies light using a light guide method, and ensures transparency by lowering a haze value in a thickness direction at the time when a light source is turned off, and enables highly efficient light emission by using plate-surface transversal radiant emitted light at the time when the light source is on. A surface light emitter (2) including light diffusing particles guides light in a length direction of the light guide while scattering the light in the thickness direction of the light guide while scattering the light in the thickness direction of the light guide, and a calculated value (m?1/%) obtained by dividing a luminance attenuation coefficient E (m?1) by a haze value (%) per 5 (mm) thickness of the light guide is greater than or equal to 0.55 (m?1/%) and less than or equal to 10.0 (m?1/%).

Abstract: An outcoupling optic and omnidirectional lamp are provided which enable an omnidirectional light distribution from a lamp with directional light sources such as light emitting diodes. Specific embodiments include the A-type lamp, A19.

Abstract: A light guide plate has a light guide plate body and at one side thereof a curvedly descending portion formed by curving front and rear surfaces of the light guide plate, with the surface to surface distance kept uniform, to a coaxial arcuate configuration so as to extend towards a direction of a rear surface of the light guide plate body. Spot light sources disposed in face to face relation with a free end face of the curvedly descending portion are arranged to be displaced towards the front surface of the light guide plate from a mid-center plane between the front and rear surfaces of the curvedly descending portion.

Abstract: An apparatus includes a light guide. A first light input section receives light in a first direction into said light guide. First direction-dependent outcoupling structures selectively couple out light propagating in said first direction in said light guide. A second light input section receives light in a second direction into said light guide. Said second direction is different than said first direction. Second direction-dependent outcoupling structures selectively couple out light propagating in said second direction in said light guide.

Abstract: A light guide plate for the edge-lit backlight module comprises a first recessed portion and a second recessed portion. The first recessed portion is provided at the bottom of a light incident end of the light guide plate for accommodating a light source. The second recessed portion is provided at the top of the light incident end of the light guide plate, corresponding to the first recessed portion.

Abstract: This disclosure provides systems, methods and apparatus for illumination devices. In one aspect, an illumination device having a longitudinal axis includes a light source and a light guide. The light guide has a peripheral edge, a transmissive illumination surface, a center portion, and an upper surface. The transmissive illumination surface is oriented perpendicular to the longitudinal axis and disposed between the center portion and the peripheral edge. The upper surface is oriented relative to the illumination surface to define an angle ? therebetween. In some implementations, the angle ? can be greater than 15 degrees, for example.

Abstract: In one aspect, the present invention provides light emitting devices, including light fixtures and luminaires. In some embodiments, a light emitting device comprises at least one light source, a lightguide operable to receive light from the at least one light source at a first location on the lightguide, at least one light extraction region optically coupled to the lightguide and a substantially non-scattering region along a portion of the lightguide.

Abstract: Techniques are disclosed for extracting light from within a lightguide by providing therein a plurality of internal light extraction features. A broad range of internal light extraction feature configurations (e.g., geometries/shapes, materials, refractive index changes, etc.) can be provided, and a variety of processes/techniques (e.g., 3-D printing, laser cutting/etching, injection molding, embossment, layer stacking, extrusion, etc.) can be used to do so. The features can be configured to achieve any desired set of photometric performance criteria (e.g., single/double-sided emission, optical efficiency, energy efficiency, spatial/angular luminance distribution, intensity gradients, etc.) for a given lightguide-based fixture/device. In some cases, internal and surficial light extraction features can be used together to extract light. Also, a wide variety of lighting fixtures/devices (e.g., panels, bulbs, tubes, rings, containers, three-dimensional structures/sculptures, multi-layered, multi-sectioned, etc.

Abstract: The backlight assembly includes a light source part and a light guide plate. The light source part generates a first light beam. The light guide plate has a plurality of light guide blocks. Each of the light guide blocks has a light incident surface, an opposite surface, a light emitting surface, and an inclined surface. The light incident surface receives the first light beam. The opposite surface is located opposite to the light incident surface, has a convex shape with respect to the light incident surface, and reflects the first light beam and converts the first light beam into a second light beam. The light emitting surface emits the second light beam. The inclined surface is inclined with respect to the light emitting surface.

Abstract: According to one embodiment, a surface light source device includes a light guide plate, and first and second light-emitting units. The light guide plate includes a flat portion and a curved portion. The curved portion guides, to the flat portion, light introduced from the end surface and transmits light introduced from the inner circumferential surface. The flat portion includes a light diffusing portion to diffuse the light guided by the curved portion, and a light-emitting surface to output the light diffused by the light diffusing portion. The first light-emitting unit emits light toward the end surface. The second light-emitting unit emits light toward the inner circumferential surface.

Abstract: A plurality of display panels include a display region and a frame region. The plurality of display panels include first and second display panels adjoining each other; the frame region of the first display panel is overlapped by a side face of the second display panel so that an angle defined by viewer-side surfaces is more than 0° but less than 180°; first and second light guide elements are disposed on the viewer's side of peripheral display regions; the light guide elements have incident and outgoing faces and a plurality of light guiding portions; the distance between the incident and outgoing faces increases away from the peripheral display region toward the frame region; the volume of the first light guide element is larger than that of the second light guide element; and the outgoing faces of the first and second light guide elements are covered by a functional film.

Abstract: A display module having an improved assembly structure is provided. The display module includes a frame, a display panel, and a glue. The frame has a side wall and a supporting part, wherein the supporting part has a supporting surface and the side wall is formed on the periphery of the supporting surface. A groove is formed on the supporting surface adjacent to the side wall and is distributed along the side wall. The display panel is disposed within the frame and has a bottom face and a side face. The bottom face is supported by the supporting surface of the supporting part. The side face faces the side wall and forms a gap with the side wall. The glue is filled in the gap and adheres the side wall to the side face.

Abstract: A light guide element includes a light-emitting section including a light-emitting surface, a light guide section, and a diffusing device provided in at least part of a region extending from a boundary surface between the light-emitting section and the light guide section, to point halfway between the boundary surface and an end of the light guide section closer to the light source. The light guide element might be used to form a backlight for a liquid crystal display device.

Abstract: A thin-profile, optically efficient lighting device for use with, among other things, flat information displays, includes a combination of two optically coupled light propagating structures. The first structure may be a compound hyperbolic-elliptic element, adapted to receive light from at least one light source, such as a light emitting diode, and inject it into the second structure, which generally is larger and has hyperbolic-elliptic shape and a plurality of flux extractors. The latter redirect the light flux so that it propagates out of the second structure with a desired luminance and/or intensity distribution in a direction that is essentially perpendicular to the surface of the second structure. The flux extractors may also be of the active, i.e. wavelength-converting, type.

Abstract: A backlight unit is capable of preventing generation of mura such bright lines and dark lines. The backlight unit includes a light guide panel divided into a plurality of light guide blocks for local dimming driving, a first block partitioning unit formed as a groove between respective adjacent light guide blocks on a lower surface of the light guide panel, and a point light source received in the first block partitioning unit.

Abstract: A lighting unit including a lens body can achieve luminous flux utilization efficiency equal to or greater than a conventional lighting unit even with a reduced width of the lens body. A vehicle lighting unit can be constituted by a plurality of the lighting units. The lighting unit can include an LED light source, and a lens body disposed in front of the LED light source so that light emitted from the LED light source can be incident thereon. The lens body can include a lens portion configured to receive the light from the LED light source to collect the light, a front surface including the lens portion, a rear surface opposite to the front surface, a first end surface functioning as a light exiting surface having a substantially rectangular shape greater in width than in thickness, and a second end surface opposite to the first end surface.

Abstract: Disclosed is a display device wherein a light emitting element can have a longer service life, while suppressing luminance unevenness without causing an increase in cost or size. The display device comprises a light guide plate (21), an LED (25) that is arranged on the side of at least one corner portion (21d) of the light guide plate (21), a frame (4) that has a lateral portion (4b), and a bezel (5) that has a lateral portion (5b). The LED (25) is attached to a part (4d) of the lateral portion (4b) of the frame (4), and the part (4d) is thermally connected to a part (5d) of the lateral portion (5b) of the bezel (5).

Abstract: Light guide plate and a display device having the same. According to an aspect of the present invention, there is provided a display device comprising a light guide plate (LGP) comprising a base, sidewalls which protrude from a surface of the base, and covers which protrude towards a center of the base, and a display panel disposed on the LGP.

Abstract: A light guide plate includes an upper surface, a lower surface facing the upper surface, a first side surface connecting the lower surface to the upper surface, the first side surface including an inclined surface defining an acute angle with respect to the upper surface, and a second side surface connecting the upper surface and the lower surface, the second side surface being a rounded surface and facing the first side surface.

Abstract: A backlight includes a light guide and a first and second light source adapted for independent operation and arranged to inject a first and second light beam, respectively, into the light guide through different portions of the light injection surface. Each light source includes a lamp and a concave reflector to partially collimate light from the lamp. One major surface of the light guide includes prismatic structures that are parallel to a first axis. Another major surface of the light guide includes lenticular structures that are parallel to each other but perpendicular to the prismatic structures. The lenticular structures limit spatial spreading for light that remains in the light guide. Each light source cooperates with the light guide to provide light that is substantially laterally confined to a transverse band of the light guide, even though the light guide contains no gaps that define slats to accomplish such confinement.

Abstract: A light guide panel 1 having a reflective sub-wavelength diffraction grating 3 generates zero-order light and minus first-order light in the reflective sub-wavelength diffraction grating 3, extracts the minus first-order light as outgoing light, and transmits the zero-order light to generate new minus first-order light by satisfying the conditional expressions: sin?1(1/n)<?1??(1) ?/{n(sin ?1+1)}??<min[2?/{n(sin ?1+1)},?/{n(?sin ?1+1)}]??(2) sin?1{sin ?1??/(n·?)}<sin?1(1/n)??(3) where, ?: wavelength of light n: refractive index of a light guide panel main body ?: period of the reflective sub-wavelength diffraction grating ?1: angle of incidence of the light in relation to the reflective sub-wavelength diffraction grating.

Abstract: The backlight module comprises a backplane and a light guide plate arranged in the backplane. The backlight module also comprises a limiting member for limiting the light guide plate. The limiting member comprises a horizontal limiting structure. The horizontal limiting structure abuts against an edge of the light guide plate and a side wall of the backplane. A limiting member is arranged between the edge of the light guide plate and the side wall of the backplane. One side of the limiting member abuts against the light guide plate, and the other side of the limiting member abuts against the side wall of the backplane. The limiting member is used for filling in a gap from the side wall of the backplane to the edge of the light guide plate. Thus, the horizontal limiting of the light guide plate by directly using the limiting member is achieved.

Abstract: The patent application relates to a fixed structure of modularized light guide plate and a backlight module, wherein the fixed structure includes a back board, a display panel, a light source, an optical module arranged between the back board and the display panel for receiving the light of the light source, and an aluminum extrusion. The aluminum extrusion is located on the upper part of the back board and is fixed on the back board. The optical module is clamped and fixed on the aluminum extrusion.

Abstract: A diffusion plate includes a base having a top surface and a bottom surface and a plurality of parallel convex ridges integrally formed on the top surface of the base while extending in one direction. Each convex ridge has a cross section shaped as a portion of an ellipse. The display apparatus includes a display panel, a light source and the diffusion plate.

Abstract: The light guide plate includes two or more layers superposed on each other in a direction substantially perpendicular to a light exit surface and containing scattering particles at different particle concentrations. The thicknesses of the two or more layers in the direction substantially perpendicular to the light exit surface are changed so that the combined particle concentration of the light guide plate has, in a direction perpendicular to at least one light incidence surface, a first local maximum value on at least one side closer to the at least one light incidence surface and a second local maximum value located at a position farther from the at least one light incidence surface than at least one position of the first local maximum value and being larger than the first local maximum value.

Abstract: A backlight module includes a light guide plate and a plurality of light sources. The light guide plate includes a wedge-shaped light incident part and a flat panel. The wedge-shaped light incident part and the flat panel have a common bottom surface. The height of the wedge-shaped light incident part is greater than that of the flat panel. The wedge-shaped light incident part includes a light incident surface perpendicular to the bottom surface and a sloped surface sloping relative to the light incident surface and connects to the flat panel. The sloped surface defines a plurality of V-shaped grooves for preventing light leak. The flat panel includes a light emitting surface opposite to the bottom surface. The plurality of light sources is positioned adjacent to the light incident surface.

Abstract: An electronic device is disclosed, which includes a housing, a touch pad structure, and a light-guiding structure. The light-guiding structure includes a light-guiding plate and a plurality of light-emitting units. The light-guiding plate has a main body and a thru-opening formed on the main body. The main body has a pair of opposing first edge portions and a pair of opposing second edge portions. A light-guiding member is formed on the main body around the thru-opening. The light-emitting units are disposed on or beyond the light-guiding pate and around the light-guiding member and illuminate toward the first and second edge portions. The touch pad structure is received in the thru-opening and surrounded by the light-guiding member. The touch pad structure and the light-guiding member are exposed through a slot of the housing.

Abstract: Described is an illumination structure suitable for a keyboard light of a portable computer. An example illumination structure includes a transparent acrylic board, a light source, and a light guide. The acrylic board may have a front surface and a rear surface, each of which is flat. The light source is provided at a tilt angle q at which an optical axis is almost at a critical angle with respect to the rear surface of the acrylic board. The light guide is located between the light source and the rear surface. Further, light rays radiated from the light source are refracted by the light guide and the optically-transparent panel, and travel towards the front surface, so as to illuminate the surface.

Abstract: Provided is a surface light source device including a light guide plate, and at least one point light source that is disposed to be adjacent to an incidence surface of the light guide plate and irradiates the incidence surface with a light beam. The light guide plate includes, at least at a position at which the point light source is disposed, at least one projection projecting from the incidence surface toward a direction in which the point light source is disposed.

Abstract: Environmentally sealed optical systems, and methods for sealing them, are disclosed. Such optical systems include area lighting panels and other optical systems. For example, in one exemplary aspect of the invention, a sealed optical system includes a substrate having first and second light sources disposed thereon, and a light-shaping panel with first and second optics formed therein that are positioned (e.g., aligned) to receive light from the first and second light sources, respectively. A sealing membrane is disposed between the substrate and the light-shaping panel, with a first adhesive surface contacting the substrate and a second adhesive surface contacting the light-shaping panel. The sealing membrane has first and second openings formed therein that allow light to pass from the first and second light sources to the first and second optics, respectively, while allowing the sealing membrane to independently seal the light sources from one another and from the external environment.

Abstract: The invention relates to an optical light guide element (1) having a first end section (8) with a light entrance area (6) designed for facing a light-transparent opening (50) and having a second end section (9) with a light exit area (7) designed for facing a light sensor (52), wherein the light entrance area (6) is defined by a surface area on the optical light guide element (1) which faces the light-transparent opening (50) and the first end section (8) forms an inclined surface area (2) which has an acute angle with the surface area of the light entrance area (6).

Abstract: The present invention provides a backlight module. The backlight module comprises a back bezel, at least one light source, a light guide plate and a heat dissipation frame. The light source is disposed in a recess of the light guide plate. The heat dissipation frame is configured to support the light guide plate and the light source, and to dissipate the heat of the light guide plate and the light source. The back bezel is configured to carry the light guide plate, the light source and the heat dissipation frame. The invention can improve the heat dissipation effect of the backlight module.

Abstract: A lighting device can include an LED and a plate-like lens body including a narrow side surface configured as an elongated rectangular light exiting surface. The LED can face towards the lens body so that light emitted in a wide angle direction is directed to the front surface and the rear surface in the thickness direction and so that light in a narrow angle direction can impinge on the second side surface of the lens body to enter the lens body. The lens body can include a first optical system having a lens portion, a first light incident surface, a first total reflection surface, and a second total reflection surface. A second optical system can include a second light incident surface, a third total reflection surface, and a fourth total reflection surface. An air layer can be provided between the lens portion and the first light incident surface.

Abstract: In one aspect, an illumination source includes a socket formed by the union of a sub-assembly platform and a light-guide element, and a discrete light source received in the socket. In another aspect, the light-guide element includes a concentration region proximate an in-coupling region opposite an out-coupling region, the concentration region directing multidirectional light from the in-coupling region toward the out-coupling region.

Abstract: An edge-lit backlight device is disclosed in the present disclosure. The edge-lit backlight device comprises a light guide plate, light sources and a backplate. The light guide plate comprises two wedged plate portions and a rectangular plate portion, the two wedged plate portions are disposed at two sides of the rectangular plate portion respectively, and the wedged plate portions and the rectangular plate portion each comprise a light incident surface and a bottom surface. The light sources are disposed adjacent to the light incident surfaces of the wedged plate portions and the rectangular plate portion respectively. A liquid crystal display (LCD) is also disclosed in the present disclosure. The edge-lit backlight device and the LCD of the present disclosure are simple in structure, allow for regional control functions and can dissipate heat generated by the light sources in a timely and efficient way.