Abstract: A lighting device of the invention includes: a plurality of light sources; and an optical waveguide, wherein light emitted from the plurality of light sources is incident from a side of the optical waveguide and then emitted from one main plane of the optical waveguide. The optical waveguide includes a first inclined plane for reflecting light emitted from a first light source and then emitting the light from the one main plane, and a second inclined plane for reflecting light emitted from a second light source and then emitting the light from the one main plane at an exit angle different from the light emitted from the first light source, and wherein each of the light sources is independently driven.

Abstract: A prism sheet for emitting an incident light in an even distribution state of light quantity even in the case of using an irradiating light source such as a point light source having an emission of narrow band. A display device for deflecting and displaying the light from the light source evenly and efficiently without deteriorating the display quality by applying the prism sheet thereto. A prism sheet for deflecting and emitting a light introduced into a transparent substrate, with a prism formed on the substrate. The prism sheet includes: a circular prism having a plurality of annular grooves arrayed concentrically from a center axis; and a radial prism having a plurality of straight grooves arrayed radially from the center axis.

Abstract: A backlight module includes a light guide plate and a light source. The light guide plate includes a first end portion, a second end portion, a middle portion between the first and second end portions, a top face extending from the first end portion to the second end portion, a bottom face extending from the first end portion to the second end portion, a light entrance face interconnecting the top and bottom faces at the first end portion, and a plurality of prismatic strips formed on the bottom face. The prismatic strips have a lower density at the first end portion as compared to the middle portion. The density is defined as a total length of the prismatic strips per unit area of the bottom face. The light source is disposed adjacent to the light entrance face.

Abstract: An exemplary light guide plate includes a light input surface, a bottom surface, a light output surface opposite to the bottom surface, and a plurality of dots. The dots are arranged on the bottom surface in series of adjacent columns parallel to the light input surface. A distance between two dot centers of two adjacent dots and sizes of the dots in a same dot column are uniform. Each dot column defines a column axis that passes through dot centers of each of the dots. A distance between two adjacent column axes increases with increasing distance from the first light input surface. A backlight module using the light guide plate is provided.

Abstract: A double-side LCD having a surface light source device including a light guide plate and a light source facing one end face of the light guide plate. A plurality of deflection patterns are formed in a surface facing a light outgoing plane of the light guide plate, the deflection pattern includes an inclined plane facing the light source side and a re-incident plane substantially perpendicular to the light outgoing plane. Light from the light source is reflected by the inclined plane and outputted from the light outgoing plane to the LCD. A tilt angle (?) of the inclined plane satisfies: 45°?[Sin?1(Sin ?/n)]/2???45°+[Sin?1(Sin ?/n)]/2, wherein ? is an angle between a direction of peak brightness of outputted light and a direction perpendicular to the light outgoing plane, n is a refractive index of the light guide plate, and ? is within 6-15°.

Abstract: A liquid crystal display includes a lamp assembly, a light guiding plate, and liquid crystal display panel assembly. The light guiding plate includes a light input face for receiving light from the lamp assembly, a light reflection face with at least one brightness enhancement recess, a light output face opposite the light reflection face for emitting light towards the liquid crystal display panel assembly, and a plurality of side faces. The at least one brightness enhancement recess reflects toward the light output face light from the light input face and light reflected by the side faces.

Abstract: Primary light from primary light source (LED) is supplied toward a light an input face of an light control member. The light input face is provided with a plurality of projections for light input promotion. Each projection is composed of a generally spherical top portion and tapered column-like portion. Height of each projection may greater than a distance as far as an adjacent projection. An light output face of the light control member may be provided with of a plurality of projections having a function of causing an inner incident light to be deflected as to approach a frontal direction on being emitted, or may be formed of a roughened surface. A light flux control member may be interposed between the primary light source and the light control member.

Abstract: An exemplary light guide plate includes a light output surface, a light reflective surface opposite to the light output surface, a light input surface interconnecting with the light output surface and the light reflective surface, and a plurality of microstructures formed on the light reflective surface. Each of the microstructures defines a specular reflection surface and a diffuse reflection surface. External light enters the light guide plate via the light input surface, a part of light rays undergo specular reflection at the specular reflection surfaces of the microstructures, and other parts of light rays undergo diffuse reflection at the diffuse reflection surfaces of the microstructures. A backlight module using the light guide plate can have a good optical performance.

Abstract: A light-emitting device is disclosed which enables efficient use of luminous flux and achieves a desired light emission characteristic. The light-emitting device has an optical member which has an emergence surface and a plurality of optical portions, each of the optical portions including a first surface which directs light incident thereon to the emergence surface. The plurality of first surfaces are inclined on the same side with respect to the emergence surface. The light-emitting device also has a light guiding member which directs light from a light source to the plurality of optical portions from one side of a direction in which the plurality of optical portions are arranged.

Abstract: An exemplary optical plate includes at least one transparent plate unit. The transparent plate unit includes a first surface, a second surface, a plurality of encircling V-shaped protrusions and a lamp-receiving portion. The second surface is opposite to the first surface. The encircling V-shaped protrusions are formed at the first surface and the second surface separately. The lamp-receiving portion is defined in one of the first surface and the second surface. A backlight module using the optical plate is also provided.

Abstract: An illuminating device includes a light source, an optical waveguide that emits light from the light source through an emission surface thereof, and a prism sheet that is provided on the emission surface side of the optical waveguide. In the illuminating device, the following relationship is established between a refractive index x of the prism sheet and an apex angle y of a prism: y=107.86x?140.43+M (?4?M?4).

Abstract: The present invention relates to a prism sheet having a side which is perpendicular to the normal of a light guiding plate. The prism sheet includes a prism sheet base film and a plurality of linearly aligned prisms. The prisms are formed on one side of the prism sheet base film. Here, one side of each prism is perpendicular to the prism sheet base film. The prism sheet condenses a light outputted from a light guiding plate using its internal total reflection, and so the efficiency of the light is enhanced.

Abstract: A video display for two or three dimensions has a flat liquid-crystal screen which ejects light from the plane at a selectable line. One or, in the case of a 3-D display, several video projectors project a linear image into the plane from an edge. A complete image is written on the screen by addressing the line with appropriate images as it is scanned down the screen. To screen a three-dimensional image, the video projectors, each projecting an image as seen at a slightly different angle, combine to constitute a three-dimensional display which produces a three-dimensional image that is one line high.

Abstract: A backlight module includes a light source, a light guide disposed on one side of the light source, a reflector disposed under the light guide, a lower diffuser disposed on the light guide, and a brightness enhancement film, which is disposed on the lower diffuser and includes a main part and several prism structures disposed side by side on a main part plane of the main part. Each prism structure includes first to third triangular prisms. The second triangular prism is adjacent to one side of the first triangular prism, and an adjacent angle adjacent to a base angle of the first triangular prism is a right angle. The third triangular prism is adjacent to another side of the first triangular prism, and an adjacent angle adjacent to another base angle of the first triangular prism is a right angle.

Abstract: The present invention relates to a light guide for lighting vehicles, preferably motor vehicles. Light rays emitted from the light source of the light guide are reflected off of reflecting surfaces toward a light exit surface. The reflected surfaces are arranged to allow full illumination of the light exit surface.

Abstract: A prism sheet capable of achieving an enhancement in light efficiency and viewing angle characteristics and a backlight unit using the prism sheet are disclosed. The prism sheet includes: a condensing film which transmits light incident to the condensing film; a plurality of prism crests on the condensing film having apexes; and a plurality of reflection patterns formed on the condensing film such that each of the reflection patterns faces a boundary of adjacent prism crests associated with the reflection pattern to reflect light incident onto the reflection patterns.

Abstract: A light assembly disperses light emitted by a light source. The lighting assembly includes a light entry surface for receiving the light emitted by the light source. A direction surface directs the light in a predetermined direction. A stepped region, disposed adjacent the light entry surface receives the light directed by the direction surface and reflects the light. The stepped region includes a plurality of step parts, each defining a light deflection surface, wherein each of the light deflection surfaces is greater in area s step distance between the light deflection surface and the direction surface increases.

Abstract: A surface light source apparatus includes a primary light source (1), an optical guide (3) for guiding light emitted from the primary light source and having a light incoming surface (31) and a light outgoing surface (32), a light deflection element (4) arranged adjacent to the light outgoing surface of the optical guide and having a light incoming surface (41) and a light outgoing surface (42), and a light diffusion element (6) arranged adjacent to the light outgoing surface of the light deflection element. The light incoming surface (41) of the light deflection element has a plurality of prism strings arranged substantially parallel to each other and each having two prism surfaces. At least one of the prism surfaces of these prism strings has a prism surface consisting of at least two planes having different inclination angles. As the plane approaches the light going surface, the inclination becomes larger.

Abstract: A prism sheet (10) includes a substrate (12) and a plurality of prism structures (14). The substrate includes a plurality of diffusing particles (122) dispersed therein. The prism structures are at a light output side of the substrate. The diffusing particles can diffuse light beams traveling through the substrate. This configuration performs the same function as that of a diffusing sheet of a conventional backlight module. The prism structures can gather light beams to improve a brightness of a backlight module (6) incorporating the prism sheet. Thus, the backlight module can provide bright and uniform light at a low cost and while having a reduced thickness.

Abstract: A surface light source (4) includes a light guide plate (2) and a light source (5). The light guide plate has an incident surface (21) and an emitting surface (22). The light source is adjacent to the incident surface of the light guide plate for radiating light beams into the light guide plate through the incident surface. The emitting surface defines a large number of prisms (221), in which the distance (L) separating each two adjacent prisms changes according to an intensity of the light beams received from the light source. In particular, the pitch between two prisms decreases with increasing distance away from the light source. By the cooperation of the prisms and the light source, the surface light source has uniform illumination over the whole emitting surface.

Abstract: A backlight module (10) includes a flat cold cathode fluorescent lamp (CCFL) (30) having an output interface, and a light guiding plate (20). The output interface has a nano-material layer coated thereon. The light guiding plate includes an incidence interface (21), an emission interface (23), and a reflection interface (22), wherein the emission interface and the reflection interface respectively have nano-sized V-shaped grooves provided thereat. A pitch of the V-shaped grooves of the emission interface gradually increases from the incidence interface to a side of the light guiding plate distal from the incidence interface, and a pitch of the V-shaped grooves of the reflection interface gradually increases from the incidence interface to the side of the light guiding plate distal from the incidence interface.

Abstract: A light-guide plate includes an incident surface receiving light, an upper surface extended from a first side of the incident surface, a lower surface opposed to the upper surface and a plurality of first prisms protruding from the upper surface and spaced apart by a separation distance.

Abstract: A dot structure of a light guide board including a front surface formed with multiple dot structures for guiding the light. Each dot structure has a face formed with multiple light guide fine structures for enhancing the light guide efficiency. Therefore, the light guide board can achieve both of high light guide efficiency and good uniformity of brightness.

Abstract: An optical deflector element has a light incoming surface (41) in which light enters and a light outgoing surface (42) located opposite the light incoming surface and from which light exits. In the light incoming surface (41) are arranged elongated prisms (41A) in parallel to each other. Each of the elongated prisms (41A) is formed by a top end flat face (46) located at the top end of the elongated prism and having an inclination angle (b) of 1 to 50 degrees, a first prism face (44) located at one side of the flat face, and a second prism face (45) at the other side. A light source device is formed by combining the optical deflector element, light guide and a primary light source. The light guide has a light incident face in which light emitted from the primary light source enters, and a light emitting face from which guided light exits.

Abstract: A backlight module including a diffuser, a reflector, a side light source, a prism lens and a TIR (total internal reflection) lens is disclosed. The reflector is disposed under the diffuser. The side light source is disposed on a side between the diffuser and the reflector. The prism lens is disposed between the side light source and the reflector. The TIR lens is disposed on a bottom of the diffuser and adjacent to the side light source.

Abstract: A luminaire with improved lateral illuminance control comprising a light pipe with a longitudinal center is disclosed. A light-extraction means applied to a radial swath of the light pipe has a longitudinal portion having dimension along its length, centered about a slice on the light pipe longitudinally; said slice being orthogonal to the longitudinal center and located in a propagation plane through which light propagates to a virtual target area intersecting the propagation plane. The light pipe intervenes between the radial swath and the target area. A first average efficiency point of the light-extraction means corresponds to the minimum distance to the target area being at least approximately 20% less than a respective, second average efficiency point corresponding to a respective maximum distance to such area. The light-extraction means efficiency varies from the first average efficiency point to the second average efficiency point though more than one non-zero value.

Abstract: A light guide device includes a main body having a first incident surface, a second incident surface, an emitting surface, a reflecting surface and a plurality of first microstructures. The first incident surface is opposite to the second incident surface. The emitting surface extends from the first incident surface to the second incident surface. The reflecting surface is opposite to the emitting surface, and the plurality of first microstructures are formed on the reflecting surface and extend parallel to the first and second incident surface. A distribution density and relative size of the first microstructures progressively decrease along directions from a center of the reflecting surface toward the first and second incident surface, respectively. The present light guide device does not employ additional optical correcting elements and thus has a simple structure. A backlight module using the same light guide device is also provided.

Abstract: A light guide plate includes a top surface serving as a light-emitting surface, a bottom surface serving as a reflecting surface, and a periphery having a first side surface serving as an incident surface and a second side surface opposite the first side surface. The bottom surface is provided with reflecting prisms successively arranged in a direction from the first to second side surface. Each reflecting prism has a first slant surface and a second slant surface succeeding to the first slant surface. The first slant surface extends toward the top surface in a direction from the first side surface toward the second side surface and the second slant surface extends away from the top surface in the same direction. The second slant surface is formed such that a large part of light reflected back from the second side surface toward the first side surface is emitted from an area of the top surface near the first side surface.

Abstract: The light redirecting films include a thin optically transparent substrate having a pattern of non-interlocking individual optical elements oriented and placed to produce a desired surface coverage of at least one of the surfaces of the transparent substrate of the transparent substrate occupied by the optical elements. At least some of the optical elements may have at least one flat surface and at least one curved surface that may intersect each other to a greater extent on the curved surface than on the flat surface to increase the relative percentage of flat surface area to curved surface area of the intersecting optical elements to increase the on axis gain of light passing through the film.

Abstract: Light redirecting films and film systems include a thin optically transparent substrate having a pattern of individual optical elements of well defined shape on or in the substrate. At least some of the optical elements may vary at different locations on the substrate to redistribute or redirect light passing through the substrate.

Abstract: A backlight unit for a flat panel display and a flat panel display apparatus having the same. The backlight unit for a flat panel display displaying a predetermined image includes: a light source which emits light; a light guide panel having an incident surface facing the light source and which totally reflects light incident through the incident surface toward the flat panel display; and a holographic pattern that includes a plurality of diffraction gratings that are continuously repeated on at least one of an exit surface of the light guide panel and the opposing surface and diffracts light incident into the light guide panel. A depth of the diffraction grating progressively increases away from the incident surface along a length direction of the light guide panel.

Abstract: At the light emission surface of a light-guiding plate, first and second grooves and second grooves are formed. Each of the first grooves has a pair of slope parts, and each slope part has an easy slope and a steep slope. The second grooves intersect the first grooves at predetermined angles. Each of the second grooves has a pair of slope parts, and each slope part has an easy slope and a steep slope. With the first grooves and the second grooves intersecting each other, at the light emission surface, a plurality of minute prisms are formed in flat quadrangular pyramid shapes to be dented toward the surface opposite to the light emission surface of the light-guiding plate.

Abstract: A back light module (3) includes a light guide plate (31) and a light source (30). The light guide plate includes a light incident surface (311), a light emitting surface (313), and a bottom surface (312) opposite to the light emitting surface. The bottom surface has a plurality of dissymmetric protrusions (314). The dissymmetric protrusions defines an angle ? between a first side (3142) thereof and a reference line of a length of the light guiding plate, and an angle ? between a second side (3144) thereof and the reference line. The light guiding plate has high brightness and uniformity.

Abstract: A prism unit includes a first prism having a first incident face and a first refraction face that is adjacent to and that cooperates with the first incident face to define a first angle ranging 50° to 70°, a second prism having a second incident face that is generally parallel to the first refraction face and a medium layer sandwiched between the first refraction face and the second incident face, and having a refractive index smaller than that of the first and second prisms.

Abstract: Light emitting assemblies include a panel member having two or more light sources, and at least one film, sheet, plate or substrate positioned in close proximity to the panel member with an air gap or cavity therebetween. Deformities on at least one surface of the panel member cause light from the light sources that mixes in the panel member to emit from the panel member. The air gap or cavity and the film, sheet, plate or substrate improve the uniformity of the light output distribution from the assembly.

Abstract: A light guide device includes a main body and a plurality of parallel elongate first V-shaped microstructures. The main body has an incident surface; an emitting surface adjoining the incident surface; and a reflecting surface opposite to the emitting surface. The first V-shaped microstructures are provided on the reflecting surface. Each of the first V-shaped microstructures has a triangular cross-section having a first base angle nearest the incident surface, a second base angle furthest from the incident surface and a vertex angle. A pitch between adjacent microstructures is configured to be substantially constant. A size of each of the first V-shaped microstructures is defined by the equation is y=9.2637×10?6x2?0.0003x+0.0232, wherein x is a distance from a given first V-shaped microstructures to the incident surface (in units of micrometers), and wherein y is a base width of the given first V-shaped microstructures (in units of micrometers).

Abstract: A light guide plate includes an incidence surface, an emission surface, a bottom surface opposite to the emission surface, and a plurality of dots distributed on the bottom surface. The emission surface and the bottom surface are adjoining to the incidence surface. Each of the dots has a substantially fan-shaped cross-section in the direction of the bottom surface.

Abstract: An exemplary backlight module (1) includes a light guide plate (10) and a light source (12) arranged to provide light beams to the light guide plate. The light guide plate includes a light emitting surface (102), a bottom surface (102) opposite to the light emitting surface, and a plurality of reflective structures (104) at the bottom surface. The reflective structures substantially define a plurality of isosceles triangular profiles, and each of the reflective structures maintains a pair of base angles relative to the bottom surface. The base angles of each reflective structure are the same, the base angles of all the reflective structures are the same, and the common base angle is in the range from 45° to 55°.

Abstract: To provide an assistant light source and a front-light emitting light to the light guide plate efficiently. A sectional shape of prism 14a in the center of light stick is isosceles triangle having a tip angle (T°) of 100° and a tilt angle (a1) of 40°. The depth of the prism 14a is D1 ?m. A sectional shape of prism 14b in a ¼ position from an end of light stick is triangle having a tip angle (T°) of 100° and a tilt angle (a2) of 34.8°. The depth of the prism 14b is D2 ?m. A sectional shape of prism 14c in an end of light stick is triangle having a tip angle (T°) of 100° and a tilt angle (a3) of 24.05°. The depth of the prism 14c is D3 ?m.

Abstract: Light guide plate 4 is provided with an emission-directivity-giving-means (such as projection rows on a back face) to modify directivity of emission from emission face 10. L light control member 11 disposed on emission face 10 is provided with a plurality of prismatic projection rows 15 running in a direction inclined anticlockwise (or clockwise). Each of incidence control portions 12 formed on incidence face 5 has an asymmetric configuration providing first and second side face (convex face) 13, 14 different from each other in curvature. Light emitted by LED 6 enters into light guide plate 4 through each incidence control portion 12, generating inner propagation light which spreads like a sector having a center axis inclined clockwise (or anticlockwise). The first and second side faces may have other configurations such as “concave faces different from each other in curvature”, “flat slopes different from each other in inclination” or “flat face and curved face”.

Abstract: An illuminating assembly includes a light source, and a refracting member disposed beside the light source for refracting a light generated by the light source, the refracting member includes a bottom portion having a light refracting device or one or more bulges for refracting the light generated by the light source, and includes an upper portion having another light refracting device or one or more swellings for refracting the light refracted from the first light refracting device. The bulge and the swelling each include two surfaces for forming an included angle between the surfaces, the bulge is preferably perpendicular to the swelling.

Abstract: The present invention relates to a liquid crystal display having excellent brightness without moiré patterns. The present invention also relates to a prism sheet and backlight unit which may improve the brightness of the liquid crystal display while removing the moiré patterns. A prism sheet comprises a protective layer including a base material consisting of a light-transmissive resin; and a plurality of diffusion particles distributed in the protective layer to scatter the light input into the base material; a base film disposed on a surface of the protective layer, wherein the light emitted from the protective layer is input into the base film; and a plurality of linear prisms having a pitch of between about 32 ?m and about 38 ?m and disposed in parallel on a surface of the base film.

Abstract: An area light source device includes a light source, a light guide including a first side surface on which emission light from the light source is incident, and a first major surface and a second major surface, which are opposed to each other and from which the incident light on the first side surface emerges, an optical sheet that is disposed on the second major surface side of the light guide and has a reflective surface on a side thereof that is opposed to the second major surface, and a film member that is disposed between the light guide and the optical sheet, has light transmissivity and has a projection-and-recess-shaped portion on a surface thereof.

Abstract: A light guide plate (300) includes a light incidence surface (310) for receiving light beams, a light-emitting surface (320) for guiding light beams out of the light guide plate, and a bottom surface (330) reflecting and scattering light beams in directions toward the light-emitting surface. The bottom surface includes scattering-dots (341), and a predetermined region of the bottom surface also includes sub-scattering-dots (342). At least one sub-scattering-dot is disposed around each scattering-dot. The sub-scattering-dots are smaller than the scattering-dots. With this micro-configuration, intensities of light beams output from the light guide plate are uniform and bright.

Abstract: A backlight unit for a liquid crystal display device includes a lamp, a lamp housing surrounding the lamp with an opening, a prism light guide plate having a first side corresponding to the opening and having prisms at a lower surface thereof, the prism light guide plate including a first portion of an even surface at the lower surface adjacent to the lamp, and a reflector opposite the lower surface of the prism light guide plate.

Abstract: A lighting device (1) includes one or more diode light sources (32), which are configured to emit light into the peripheral edges of a light guide (20). The light guide (20) includes a set of diffusing elements (22) for scattering the emitted light in a plurality of directions out of the front surface of the light guide (20). The diffusing elements (22) are distributed on the light guide (20) so that the scattered light achieves a particular characteristic, e.g., improved uniformity.

Abstract: A film for use with a backlit display has prismatic structure on one surface. The structures have a serpentine shape. The average periods and amplitudes of the serpentine shapes may be optimized to minimize moiré interference with the pixels of the display.

Abstract: A light-conductive panel of side-light type backlight module is disclosed. The reflective plane of the light-conductive panel is formed with a plurality of light conductors, and one lateral side of the conductor is formed with an auxiliary light conductor which is formed along the light conductor. The leak light source which can be led into the light-conductive panel from the light conductor can be connected by the matching auxiliary light conductor such that the leaked light source can be further led to the interior of the light conductive panel so that the chance of the leaked light source on the reflective plate is reduced, which will reduce the light energy exhaustion caused by the light source being fallen onto the reflective plate.

Abstract: A light guide plate (30) includes an emitting surface (32) having a plurality of V-shaped prisms (33) thereat, a bottom surface (34) opposite to the emitting surface, the bottom surface having a plurality of arc-shaped grooves (35) thereon, and a cutout portion at a corner between two adjacent sides of the light guide plate, the cutout portion defining a light incident surface (31). When light beams enter the light guide plate and are reflected by the arc-shaped grooves, the parallel V-shaped prisms significantly reduce or even eliminate further reflection of the reflected light back into the light guide plate. Most or all reflected light beams reaching the emitting surface transmits out from the light guide plate and are utilized. Therefore, the light guide plate and the backlight module can provide highly efficient utilization of light beams.

Abstract: A backlight module includes a light source, a light guide disposed on one side of the light source, a reflector disposed under the light guide, a lower diffuser disposed on the light guide, and a brightness enhancement film, which is disposed on the lower diffuser and includes a main part and several prism structures disposed side by side on a main part plane of the main part. Each prism structure includes first to third triangular prisms. The second triangular prism is adjacent to one side of the first triangular prism, and an adjacent angle adjacent to a base angle of the first triangular prism is a right angle. The third triangular prism is adjacent to another side of the first triangular prism, and an adjacent angle adjacent to another base angle of the first triangular prism is a right angle.