Abstract: This invention relates to a display apparatus comprising: a) a light source; b) a light guiding plate for transmitting light from the light source outward from a two-dimensional light-providing surface, one dimension of the light-providing surface defined in a width direction orthogonal to the path of incident light from the light source defined in a width direction orthogonal to the path of incident light from the light source and the other dimension of the light-providing surface defined in a length direction, orthogonal to the width direction; c) a linear divergence reduction surface for reducing the divergence of light from the light providing surface predominantly with respect to the width direction, to provide a linearly divergence-reduced illumination, whereby divergence along the width direction at full-width half-maximum is less than about 50% of divergence at full-width half-maximum along the length direction; d) a liquid crystal display component for modulating the linearly divergence-reduced light

Abstract: An edge lighting back light unit (BLU) includes at least a point illuminant, a light guide unit, and a light guide plate. The light guide unit includes a plurality of micro-structures for breaking the total reflection inside the light guide unit to generate a uniform linear light illuminating outside the light guide unit. Then, the light guide plate could reflect the light from the linear illuminant to form a uniformly planar illuminant. The edge lighting BLU in the present invention could reduce the components, lower the temperature, and avoid the light mura.

Abstract: Provided is a backlight device that includes: a light guide panel having a diffraction pattern for emitting light through an emission surface of the light guide panel by diffracting light entering the light guide panel; and a chromatic dispersion compensation member that is an optical transmitting member located on a light emission side of the light guide panel and has a lattice pattern having a depth in a direction vertical to the emission surface of the light guide panel.

Abstract: A light emitting panel comprises a light guiding medium having at least one light emitting face and a plurality of light sources (LEDs) configured to couple light into an edge of the light guiding medium at four or fewer locations around the edge. A pattern of optical features (discontinuities) is provided on at least one face of the light guiding medium for promoting emission of light from the light emitting face. The pattern of features is configured such as to reduce a variation in emitted light intensity over substantially the entire surface of the light emitting face such that the variation is less than or equal to about 25%. The pattern of features is configured in part in dependence on a light intensity distribution within the light guiding medium and the spacing, size, shape and/or number of features per unit area can depend on distance from each light source.

Abstract: The wedge-shaped light guide plate has a number of reflection structures with gaps therebetween arranged along the light reflection plane. Each reflection structure from a previous gap contains sequentially a slant surface extended away from the light emission surface, a second reflection surface further slanting away from the light emission plane, and a first reflection surface slanting towards the light emission plane to connect to a next gap. The second and first reflection surfaces form a prism element. In one embodiment of the present invention, the reflection structures are more densely arranged as they are more distant from the light source. In an alternative embodiment of the present invention, the reflection structures are arranged uniformly.

Abstract: An exemplary light guide plate includes a light input surface, a light output surface adjoining the light input surface, and a reflecting surface opposite the light output surface. At least one of the light output surface and the reflecting surface defines a plurality of microstructures extending along a direction from a first side away from the light input surface to the light input surface, and the extending paths of the plurality of microstructures gradually transform from parallel straight lines to intersecting curves.

Abstract: A light guide plate includes a light input surface, a light output surface adjoining the light input surface, and a reflecting surface opposite the light output surface. One of the light output surface and the reflecting surface defines a plurality of scattering microstructures. Each scattering microstructure includes a spherical protrusion having a substantially spherical surface, and a substantially ring-shaped groove defined around a periphery of the spherical protrusion. At least half of the spherical surface is as smooth as a mirror. A method for manufacturing the light guide plate and a backlight module using the light guide plate are also provided.

Abstract: A liquid crystal display module device includes a light-guide plate, a lamp disposed along one side of the light-guide plate, and a plurality of lamp holders enclosing opposing end portions of the lamps, wherein the lamp holders include transparent material.

Abstract: An optical sheet includes a substrate onto which light is incident, and a convex part protruded from the substrate by a predetermined thickness. A thickness of the convex part increases from an edge to a center thereof.

Abstract: A light guide includes a body having an elongate shape and a plurality of light-reflecting faces and light-emitting faces extending along the body. The light-reflecting faces extend in a stepped fashion along the body in the direction of a longitudinal axis of the light guide and are configured to reflect light rays by the principle of total internal reflection. Each light-emitting face is disposed along the body opposite a corresponding light-reflecting face. Each light-emitting face is configured to emit light reflected by the corresponding light-reflecting face. The light-emitting faces are also disposed on the body in a stepped fashion. Steps of the light-emitting faces correspond to steps of the light-reflecting faces. In another aspect, the light-reflecting faces are separated by stepped-down faces. The stepped-down faces are oriented at a stepped-down angle in the range of about 1 and 10 degrees with respect to the longitudinal axis of the light guide.

Abstract: It is an object to provide a planar illumination device that is thin and light weight, and can emit uniform illumination light with little brightness unevenness and can be enlarged in size.

Abstract: A light controlling sheet is provided in a surface light source device including a light source portion. The light controlling sheet includes an outgoing light side lens portion having multiple unit lenses arranged to project toward the outgoing light side, and transparent portions and reflecting portions provided on the incident light side. The transparent portions and the reflecting portions are arranged alternately, and the transparent portions comprise 40% to 60% of the total area of the light controlling sheet when viewed form a direction orthogonal to the sheet surface on the incident light side.

Abstract: A system and/or a method for reads, measures and/or controls intensity of light emitted from a light-emitting diode (LED). The system and/or the method have a light intensity detector adjacent to the LED for reading and/or measuring the intensity of light emitted from the LED. The system and/or the method have a control circuit that may be electrically connected to both the detector and/or the LED for measuring and/or for controlling an intensity of light emitted from the LED. A housing surrounds the light detector and/or the LED. The housing has a pathway that allows only light emitted from the LED to reach the light detector. The LED has a finish and/or a coating that eliminates and/or retards absorption of light by internal components of the LED. The finish and/or the coating eliminates and/or retards reflection of the light by the LED.

Abstract: A flat screen comprises a liquid-crystal element, such as an LCD element, for representing an image. Further, a plurality of point light sources, such as LEDs, are provided. Between the point light sources and the liquid-crystal element a light-guiding element is arranged. For rendering the brightness distribution more uniform, the light-guiding element comprises at a surface thereof a plurality of diffractive surface elements arranged in cells.

Abstract: Disclosed are a light guide which distributes light, transmitted from a light source, uniformly to a light emission surface of the light guide, and a display device and an image forming apparatus using the light guide. The light guide includes a light incidence part having a diffusion structure diffusing light, a reflecting surface reflecting the light diffused by the diffusion structure to reduce a light loss from the light guide, and a light guide part guiding light between the light incidence part and the light emission part.

Abstract: A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. Light from the point light source is reflected at a lamp reflector to be incident on at least two side surfaces of the plane-like light guiding plate.

Abstract: An illumination device using LEDs (101) has a circuit board and a plurality of LEDs disposed on the circuit board elements. The circuit board can be obtained by assembling a plurality of the circuit board elements (11) together. The circuit board element comprises a board (110) and an electric trace (1151) attached to the board. The board comprises a plurality of connecting units (111, 112, 113, 114) formed at lateral sides thereof. The circuit board element connects with an adjacent circuit board element via the connecting units. The electric trace extends from the board to the connecting units and electrically connects with the electric trace of the adjacent circuit board element.

Abstract: An exemplary optical plate (20) includes a transparent plate (21) and a light diffusion layer (22). The transparent plate includes a light output surface (212), a light input surface (211) opposite to the light output surface, and a plurality of elongated recessed portions (213) formed at the light input surface. The light diffusion layer is coated in the elongated recessed portions. The light diffusion layer and the light input surface cooperatively define a flat surface. A backlight module using the present optical plate is also provided. The present backlight module using the optical plate can have a thin body with a good optical performance.

Abstract: Optical assembly includes a light emitting panel member having at least one light input area for receiving light from two or more different colored light sources. A pattern of individual optical deformities on or in at least one surface area of the panel member contains at least two different configurations of optical deformities to promote color mixing within the panel member and cause light of a preferred color to be emitted therefrom.

Abstract: A sheet-shaped lightguide member includes a lightguide sheet having a first surface, a second surface opposite the first surface, and a peripheral edge surface a part of which is defined as a light entrance surface. At least one of the first and second surfaces has microscopic irregularities over the whole area thereof. The lightguide member is provided with a lightguide layer on a region of the at least one of the first and second surfaces. The lightguide layer defines a lightguide region in the at least one of the first and second surfaces retaining an exposed region as a light-emitting region. The lightguide layer is configured to guide the light received through the light entrance surface toward the light-emitting region.

Abstract: A reflective electronic display includes a front light assembly with a diffuser for enlarging the viewing cone of the display. The front light may include a substrate, a plurality of optical turning features, and a diffuser formed therebetween. The haze of the diffuser may be spatially non-uniform and switchable between two or more levels.

Abstract: An optical navigation devices and methods that utilize an internal reflection surface to reflect and collimate sidelight from a light source are described. A light source is configured to emit light. The sidelight from the light source is reflected and collimated by an internal reflection surface towards a work surface. The light received by the sensor is used to measure movement of the optical navigation device relative to the work surface.

Abstract: A lighting device includes: a light source; a light guiding plate; and a reflector. The light guiding plate includes: a light entrance part, which introduces light of the light source into the light guiding plate; and a plurality of reflecting parts, which are formed on at least the one of the light exit face and the opposed face to cause the introduced light to exit to outside. The plurality of reflecting parts are arranged in staggered pattern in a circumferential direction of a circle having the light entrance part as its center, and in a radius direction orthogonal to the circumferential direction. Therefore a reflecting surface of one of the plurality of reflecting parts that is placed in a back does not fall in a shadow of another one of the plurality of reflecting parts that is placed nearer to the light source, and incident light is reflected in a wide area.

Abstract: A backlight unit for a display device is disclosed. The backlight unit includes a first optical sheet, a light source to supply light to the first optical sheet, and a first antireflection layer on a surface of the first optical sheet.

Abstract: The invention relates to a light panel, comprising a light source (1) and a panel element (2). The panel element is manufactured from a substantially transparent material for transmitting light thereby. The panel element (2) is further configured as a waveguide panel, inside which the light beams propagate with total reflection and get outcoupled therefrom with a diffractive outcoupling system. An outcoupling system (2u), such as a grating structure or the like, is adapted to cover the entire panel element (2) as far as its light surface (2a) is concerned, such that divergent recesses and/or grooves of various sizes and/or shapes are used to produce divergent local gratings of various sizes and/or shapes, such as multi-shaped and/or binary pixels and/or units, having the filing factor, shape, profile and/or size thereof optimized in such a way that the diffraction efficiency is a function of place.

Abstract: A surface light source includes: a light guiding plate including, in a main region, a light emitting surface and a back surface facing the light emitting surface; and a light source being provided on a back surface side in an end region of the light guiding plate, the light source emitting light so that the light emitted from the light emitting surface. The surface light source further includes: an inclining surface being formed along an end section on the light emitting surface side in the end region so that the light guiding plate becomes thinner toward the end section; a reflecting member covering the inclining surface; and a light incident end face being provided on the back surface side and extending along the end section, the inclining surface being formed so that light entering the light incident end face at a right angle is totally reflected by the light incident end face after being reflected by the inclining surface or the reflecting member.

Abstract: The present invention provides a light pipe for a direct-type backlight having an upper surface and a lower surface, which has: a light reflecting member provided on the upper surface; and plural light scattering members formed concentrically on at least one surface selected from the upper surface and the lower surface, wherein each of the plural light scattering members is a circular groove or a circular projection, wherein each area between respective light scattering members is substantially the same.

Abstract: A light guide plate and a display device having the same are provided, which can uniformly emit light on the whole. The light guide plate includes a light input part including first and second areas to which light is incident, and a light output part neighboring the light input part and outputting light. The light having passed through the first area is emitted with its light quantity distribution biased in a first direction, and the light having passed through the second area is emitted with its light quantity distribution biased in a second direction different than the first direction.

Abstract: An exemplary optical plate includes at least one transparent plate unit. The transparent plate unit includes a light output surface, a bottom surface, a plurality of microstructures, and at least a lamp-receiving portion. The bottom surface is opposite to the light output surface. The microstructures are formed at the light output surface and the bottom surface respectively. Each microstructure has circular cross-sections taken along a plane parallel to its base surface thereof, a diameter of the circular cross-sections decreasing along a direction away from its base surface thereof. The lamp-receiving portion is defined in the bottom surface. A backlight module using the present optical plate is also provided.

Abstract: A luminaire (50) comprises a light source (51) and a light-emitting panel (52). The light source is used to provide white light. The panel comprises a light emission surface (53) and a light incidence surface (55). A plurality of first and second deformities (56) are formed in the light emission surface. Some of the deformities are applied by dye material (58). The dye material is used to fill out light having a same color as the color of the dye material from the white light. The deformities having dye material are arranged in a pattern to form a symbol.

Abstract: A light guide plate includes a transparent body, a plurality strip-shaped light diffusion structures and a plurality of strip-shaped light-collecting structures. The transparent body has a first light exit surface and a light incident surface adjacent to the first light exit surface. The strip-shaped light diffusion structures convexly extend from the first light exit surface of the transparent body and each of the strip-shaped light diffusion structures has a second light exit surface distant from the first light exit surface. The strip-shaped light-collecting structures correspond to the strip-shaped light diffusion structures, and each of the strip-shaped light-collecting structures convexly extends from the second light exit surface of the corresponding strip-shaped light diffusion structure. A cross-sectional shape of each of the strip-shaped light-collecting structures is approximately symmetrical with respect to a central normal plane of the corresponding second light exit surface.

Abstract: An exemplary illuminating device includes a light guide member and a light source. The light guide member includes an annular main body and at least one light incident portion extending from and optically coupled to the annular main body. The light source is optically coupled to the at least one light incident portion. The annular main body has a light emitting surface. The annular main body has a plurality of micro protrusions formed on the light emitting surface.

Abstract: A backlight module includes a light guide plate, which includes a substrate and at least two light guide sets formed on a surface of the substrate. Each light guide set includes a plurality of light guide elements, with the light guide elements including emission surface structures to emit light, and the emission surface structures of the light guide elements of one of the light guide sets being different from the emission surface structures of the light guide elements of another one of the light guide sets.

Abstract: An edge-light type light guide plate 30 is provided and has a first surface 31 and a second surface 32 that are opposed to each other, and a peripheral edge surface extending between the peripheral edges of the first and second surfaces. A part of the peripheral edge surface is defined as a light entrance plane 30a. The first surface 31 has a series of parallel elongated convex surfaces 31a that have an arcuate cross-section and extend in a direction substantially perpendicularly intersecting the light entrance plane 30a. The second surface 32 has a series of parallel elongated concave surfaces 32a that have an arcuate cross-section and extend in a direction substantially perpendicularly intersecting the elongated convex surfaces 31a on the first surface.

Abstract: Optical assembly includes a reflector layer, a generally planar first surface located on a first major plane, and a generally planar second surface located on a second major plane approximately parallel to the first major plane and superimposed thereon. The first and second surfaces have first and second patterns of well defined optical elements that are quite small in relation to the length and width of the optical assembly. At least some of the optical elements of the first pattern include a first sloped surface for reflecting at least some light (that is emitted from at least one light source that is quite small relative to the length and width of the optical assembly) towards at least some of the optical elements of the second pattern and for transmitting or refracting at least some light towards the reflector.

Abstract: Optical assembly includes a generally planar light output surface located on a first major plane, and a generally planar second surface located on a second major plane approximately parallel to the first major plane and superimposed thereon. Both the light output surface and the second surface have respective first and second patterns of well defined optical elements that are quite small in relation to the length and width of the optical assembly. The optical elements of the first pattern have an apex angle formed by a first sloped surface that is larger in an area closer to at least one light input edge of the optical assembly and smaller in another area further away from the light input edge.

Abstract: A backlight device with improved efficiency in the utilization of light and a liquid crystal display device providing this backlight device are provided, the backlight device comprising at least a light source 2, a light guide plate 1 and a reflector 10, in which the light guide plate 1 further provides an entry face 5 into which light from the light source is incident, a lower face 4 substantially perpendicular to the entry face 5 and that opposes the reflector 10, and an upper face 3 that opposes the lower face 4, and reflective elements 6 that are capable of reflecting such that light is emitted from the lower face 4 toward the reflector 10 are disposed on the upper face 3 of the light guide plate.

Abstract: A light guide plate (30) includes a light incident surface (31), a light emitting surface (32) and a bottom surface (33). The light emitting surface adjoins the light incident surface. The bottom surface faces an opposite direction of the light emitting surface. A number of first microstructure units (321) and second microstructure units (323) are interlaced and formed on the light emitting surface. Each first microstructure unit has a number of first prism lenses (3211) extending out from the light emitting surface parallel to the light incident surface, and each second microstructure unit has a number of second prism lenses (3231) extending out from the light emitting surface perpendicular to the light incident surface.

Abstract: Light emitting panel assemblies include an optical panel member having a pattern of light extracting deformities on or in one or both sides to cause light to be emitted in a predetermined output distribution. The pattern of light extracting deformities on or in one side may have two or more different types or shapes of deformities and at least one of the types or shapes may vary along the length or width of the panel member. Where the light extracting deformities are on or in both sides, at least some of the deformities on or in one side may be of a different type or shape or vary in a different way or manner than the deformities on or in the other side.

Abstract: Provided are a light guide member, a lighting apparatus including the light guide member, and a method of fabricating the light guide member. The light guide member comprises: a body, which is formed as a transparent plate, including a first surface and a second surface facing the first surface; and a plurality of dimple type optical controllers formed beneath at least one of the first surface and the second surface and having reflective surfaces that reflect light proceeding between the first and second surfaces of the body toward at least one of the first and second surfaces.

Abstract: A monolithic light guiding and dispersing plate is provided in a backlighted display panel for receiving input light from one or more edge sources and for guiding the received light throughout the plate for substantially uniform reflection upwardly and substantially uniform dispersal toward an image forming plane located above the light guiding and dispersing plate. In one embodiment, the light guiding and dispersing plate has a light receiving surface upon which the light generated by an edge light source is incident, a top major surface which is adjacent to the light receiving surface and on which a plurality of first protrusions are formed and elongated in a first direction, wherein the first protrusions have cross-sections in the shapes of partial ellipses. The plate further has a bottom major surface in which light reflecting recesses are defined to reflect light upwardly towards the top major surface.

Abstract: A light pipe is obtained by laminating on one or both surfaces of a light-transmitting resin plate a polarized-light scattering plate having fine birefringent domains dispersed therein and hence showing anisotropy in scattering. The polarized-light scattering plate comprises a transparent film having fine domains dispersed therein comprising a liquid crystal polymer which exhibits nematic at temperatures lower than the glass transition temperature of the polymer constituting matrix of the transparent film and has a glass transition temperature of 50° C. or higher. The light pipe as a laminate may further comprise a specular reflection layer, a polarization-retaining lens and a light diffusion layer laminated thereon. The light pipe may further comprise a light source mounted at least on one side face thereof to provide a planar polarized-light source.

Abstract: A backlight module (20) includes a light source (21), a prism sheet (23) and a light guide plate (22). The light guide plate includes an incident surface (221), an emitting surface (223), a bottom surface (222) and a plurality of depressions (224). The emitting surface is located adjoining the incident surface. The depressions are formed on the emitting surface. Each depression has a refractive surface (225) and a reflective surface (226) adjoining the refractive surface. The reflective surface faces the incident surface, and the refractive surface faces away from the incident surface. The light source is arranged besides the light guide plate and facing the incident surface. The prism sheet has a prism surface facing the emitting surface of the light guide plate and forms a plurality of prisms (241) on the prism surface.

Abstract: A backlight device for a display comprising (1) a side-lit light source, (2) a light guide plate and (3) a turning film comprising a light entry and a light exit surface comprising lenticular elements on the exit surface and prismatic structures on the entry surface, wherein the average values of the parameters of the features and the thickness of the film are selected to provide a peak output angle of ±10° from normal to the light exit surface of the light guide plate and an optical gain of at least 1.25. Also disclosed are methods of making the turning film and a display incorporating the backlight.

Abstract: Disclosed is a light guide plate, comprising a light guide plate body and a plurality of micro mirrors formed on an upper surface of the light guide plate body for controlling a reflection direction of light incident on the light guide plate. The amount of light output from a backlight module using the light guide plate can be controlled by adjusting an angle of each of the micro mirrors with respect to an incident light from a light source.

Abstract: A surface emitting device and a display apparatus including the same. The surface emitting device includes: a light source; and a light guide plate having a light exit surface on which holographic patterns are formed, and guiding light emitted by the light source such that the guided light is emitted from the light exit surface, wherein the holographic patterns are arranged so that light incident on the light guide plate without passing through any side surface of the light guide plate can be incident on the holographic patterns at an azimuth greater than 45° at which light emitting efficiency is low and light incident on the light guide plate and reflected by any side surface of the light guide plate can be incident on the holographic patterns at an azimuth at which light emitting efficiency is high.

Abstract: On a light guide plate (32), a prism sheet (36), an uneven diffuser plate (37) and a correcting optical sheet (38) are placed one over another. Light outputted from the light guide plate (32) in a direction substantially parallel to a light outputting surface (45) is bent to a direction substantially vertical to the light outputting surface (45) by the prism sheet (36). Light which passed through the prism sheet (36) and has a long directivity characteristic in an r axis direction is converted into light having a substantially circular directivity characteristic by passing through the uneven diffuser plate (37). Furthermore, the light which passed through the uneven diffuser plate (37) and has the substantially circular directivity characteristic is converted into light having a directivity characteristic closer to a perfect circle by the correcting optical sheet (38). The correcting optical sheet (38) is formed of a pattern having many polyhedron shapes.

Abstract: A light guide plate includes a first optical member having a first light path-changing portion to separate a first light portion and a second light portion from a light, and a second optical member having a second light path-changing portion corresponding to the first light path-changing portion. The first optical member has a first refractive index against the first light portion of the light and a second refractive index against the second light portion of the light, and the second optical member has the first refractive index against the first and second light portions. Thus, brightness and brightness uniformity of an image displayed on a display apparatus may be improved, and a number of parts of the display apparatus may be reduced.

Abstract: An optical plate (32) includes a transparent plate (321) and a light diffusion layer (322). The transparent plate includes a light output surface (3211), a light input surface (3213) opposite to the light output surface, and a plurality of spot-shaped depressions (3215) at the light input surface. The light diffusion layer is coated on the light input surface and the spot-shaped depressions, and covers the light input surface completely. The light diffusion layer includes transparent resin matrix material, and first and second light diffusion particles dispersed in the transparent resin matrix material uniformly. A refractive index of the second light diffusion particles is greater than that of the first light diffusion articles. A backlight module (30) using the present optical plate is also provided. The backlight module using the optical plate can have a thin body with a good optical performance.

Abstract: An exemplary light guide plate (23) has a light incident surface (231); at least one side surface (232), the side surface being connected with the light incident surface; a light emitting surface (233), orthogonal connected with the side surface and the light incident surface; and a bottom surface (234) opposite to the light emitting surface. At least one of the light emitting surface and the bottom surface has a plurality of protrusions (235) spaced a predetermined distance, each protrusion having a plurality of grooves (2351).