Abstract: The present invention provides a diffusing sheet, a surface light source device, and a transmission type display, that can attain uniform illumination so that the brightness of light on the display screen appears uniform regardless of the position from which the display screen is observed. A transmission type display 10 comprises an LCD panel 11, and a surface light source device 16 for illuminating the LCD panel 11 from its rear. The surface light source device 16 includes a plurality of cathode ray tubes 13 that are arranged in parallel. A diffusing sheet 14 and a convergent sheet 12 are placed between the cathode ray tubes 13 and the LCD panel 11 in the surface light source device 16. The diffusing sheet 14 includes, on its light-emerging side surface, a diffusion lens array 141.

Abstract: The invention provides a reflective plate that includes a first reflective part having a predetermined surface roughness and a second reflective part having a surface roughness that is less than the predetermined surface roughness of the first reflective part. The invention also provides a reflective plate that is capable of supplying a liquid crystal panel with substantially uniform light.

Abstract: Light emitting assemblies include an optical conductor having at least one slot, cavity or hole in at least one side that defines at least one input surface for a light source having a light output distribution defined by a greater width component than height component. The optical conductor has a predetermined pattern of deformities that vary to cause a desired light output distribution to be emitted from a plurality of specific surface areas of the optical conductor.

Abstract: The light source device of a display device according to the present invention has an optical waveguide, a cone sheet, and a light source disposed along the side surface of the optical waveguide. The light-emitting surface of the optical waveguide is flat, and a tilted surface that is tilted towards the light source with respect to the light-emitting surface is formed on the light-diffusing surface. The cone sheet has a flat plate and a plurality of circular cones arranged two-dimensionally on the light-incident surface of the flat plate. The central axes of the circular cones are parallel to each other. The invention provides a light source device that can be made thin and is capable of increasing the directivity of emitted light in two dimensions.

Abstract: In a backlight which arranges light emitting diodes on a side surface of a light guide plate, irregularities of radiation light from the backlight can be decreased. In a liquid crystal display device having a backlight which radiates light to a liquid crystal panel, LEDs which constitute a light emitting element are mounted on a light guide plate formed on the backlight, and teardrop-shaped lenses are formed on a light radiation surface of the light guide plate. By changing the advancing directions of lights radiated from the light emitting element using the teardrop-shaped lenses, it is possible to decrease irregularities of a planar light source by scattering the radiation lights from the light guide plate.

Abstract: An optical film includes a substrate and at least one pyramid-like structure. The pyramid-like structure is disposed on one surface of the substrate and has a base, a first face, a second face and a third face. The first, second and third faces are connected together and disposed along the base.

Abstract: In the lighting device, cylindrical lenses are provided on a reflection surface side of a light guide plate, and the adjacent cylindrical lenses are connected by a concaved curved surface.

Abstract: A thin planar illumination device with a high light utilization efficiency is provided. In a planar illumination device 10, light source sections 15, 16, 17 and 18 each radiates laser light. The light guide members 19 and 20 polarize, by total reflection, light incident from side surfaces 19b and 20b on two opposite sides thereof, so as to be radiated from incident surfaces 19a and 20a, respectively. In a light guide plate 21, the light is incident from side surfaces beside the respective light guide members 19 and 20 so as to radiate irradiation light 24 from main surfaces 21a and 21b. The main surface of the light guide plate 21 is formed by a plurality of inclined surfaces, each being gradually thinned from the edge surfaces on two sides thereof toward a center thereof.

Abstract: Light emitting assembly includes a generally planar optical conductor having at least one output region for emitting light and at least one light source positioned adjacent at least one light input edge located on a side or at or near a corner of the optical conductor for directing light into the optical conductor. The light source has a total length that is quite small in relation to the length and width of the optical conductor and is configured to generate light having an output distribution defined by a greater width component than height component.

Abstract: Backlight assembly includes a waveguide having a greater width than height and at least one light emitting area for illuminating a display. A light source assembly optically coupled to the panel includes a light emitting source and at least a reflective or refractive surface to disperse light emitted from the light emitting source more along the width than height of the panel.

Abstract: A light guide plate a light incidence surface, a light-emitting surface joining with the light incidence surface, a diffraction grating having a plurality of grating slots formed on the light-emitting surface, and a bottom surface on an opposite side of the light guide plate to the light-emitting surface. The diffraction grating converts light that has been dispersed by reflection and refraction into plane parallel light thus increasing brightness.

Abstract: The light control film provides improved front luminance and appropriate diffusion without the problems of interference pattern, glare. The light control film has a rough surface that, for substantially any arbitrary cross section perpendicular to a base plane of the film, has an average ?ave of absolute values of slope, with respect to the base plane of a curve along the edge of the cross section, which is not less than 20 degrees and not more than 75 degrees, and has an absolute value of skewness (JIS B0601:2001) of the profile curve of not more than 1.2.

Abstract: A light control plate 30A of the present invention is disposed in front of a surface light source 20 that emits, in a predetermined direction, parallel light Fi having a substantially uniform luminance distribution. The light control plate 30A has a light incidence surface 30a, at which there are provided optical path control sections 31A of concave and/or convex cross-sectional shape, and a planar light exit surface 30b. The surface of the optical path control sections 31A comprises first to M-th planar portions 32A1 to 32AM. The inclination angles ?1 to ?M and pitch ratios L1 to LM of each planer portion are specified in such a manner that the parallel light Fi can be spread within an exit angle range ??max to ?max relative to the predetermined direction, to exit as light having a substantially uniform luminance angular distribution within the exit angle range.

Abstract: A light-guide board includes a light guide plate made out of an optically transmissive material and having a transparent layer and a back reflecting layer formed integral with the back side of the transparent layer, and a plurality of reflecting baffles respectively extending from the back reflecting layer and embedded in the transparent layer for reflecting light to enhance the intensity of light and the uniformity in light intensity.

Abstract: A light source unit includes a light source, and a light guide pipe formed in a columnar shape and including a plurality of grooves, to which light emitted from the light source is incident, wherein dimensions of the grooves further from the light source are different from dimensions of the grooves closer to the light source, respectively.

Abstract: A lighting device may include light sources at one or two distal ends; wherein LEDs may be used as a light source. The lighting device may comprise a housing, at least one light-entering plane, at least one light-emitting plane and at least one guiding surface attached to the housing. A plurality of guiding blocks are configured and disposed on the guiding surface, and at least one distal end of the guiding surface is adjacent to the light source such that as light travels into and within the housing, light may be reflected and/or deflected by the guiding blocks and exits the housing via the light emitting plane. The illumination area opposite the light emitting plane may therefore receive substantially uniform lighting from the lighting device. The device may further comprise a reflector covering a portion of the guiding surface and a diffuser covering a portion of the light emitting plane.

Abstract: The present invention is to provide a display device capable of displaying a prescribed display pattern by making the pattern luminous as needed, while the rear side can usually be seen through easily. In order to achieve it, a display pattern 20 is formed with minute recesses 29 provided on at least one surface of a translucent substrate 10, and at least one light source 30 is disposed on a side end face of the translucent substrate 10. The area density of the minute recesses 29 constituting the display pattern 20 is set to not more than 20%, and the opening area of one recess 29 is set to not more than 0.03 mm2.

Abstract: A light guide and associated display having high uniformity of luminance over the entire light guide and display front side are disclosed.

Abstract: The present disclosure is directed to optical devices including a light source and an optical film having a first surface disposed to receive light from the light source and a second surface facing away from the light source. The second surface includes a two-dimensional array of closely packed substantially hemispherically-shaped structures. In some implementations of the present disclosure, the optical film further includes a substrate portion having an optical characteristic different from optical characteristics of the second surface comprising the two dimensional array.

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 protrusions, a plurality of elongated V-shaped protrusions and a lamp-receiving portion. The second surface is opposite to the first surface. The encircling protrusions are formed at the first surface. The elongated V-shaped protrusions are formed at the second surface. 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: The present invention provides a multi-block backlight device having light guiding to solve the problems met in the current backlight devices with high cost, difficult matching with the panels, and inefficient lighting area. The multi-block backlight device comprises a plurality of light guiding devices, the light guiding device comprises at least one incident portion, the incident portion comprises at least one light source and an incident area; at least one eave, and a diffusion portion with uniform thickness. The eave can increase effective lighting area of the multi-block backlight device, and the diffusion portion can make the multi-block backlight device easier to couple, therefore achieving cost decreasing and effective usage.

Abstract: An exemplary optical plate includes at least one transparent plate section. The transparent plate section includes a light output surface, a bottom surface, a plurality of depressions and at least one lamp-receiving portion. The light output surface is opposite to the bottom surface. The depressions are formed on the light output surface. The lamp-receiving portion is defined in the bottom surface. A backlight module using the present optical plate is also provided.

Abstract: An exemplary optical plate (20) includes a light output surface, and a bottom surface opposite to the light output surface. A plurality of first protrusions are formed on the light output surface. A lamp-receiving portion is defined in the bottom surface. A backlight module (200) using the optical plate is also provided.

Abstract: A backlight arrangement (100) comprising at least a light source (101) and a waveguide plate (102) comprising a front surface (104) and an opposing back surface (103) and at least one surface (107) for receiving light from said light source (101), said surface for receiving light connecting said front and back surfaces is provided. At least one of said front surface (104) and said back surface (103) is a facetted surface comprising a plurality of planar parallel portions (105) and a plurality of facets (106) connecting said planar parallel portions. The facets (106) are formed such that the thickness of said waveguide plate (102) decreases stepwise with the distance from said surface (107) for receiving light, and such that at least part of the light received into the waveguide plate (102) via said surface (107) for receiving light is extracted from said waveguide plate (102) through said facets (106).

Abstract: Light emitting panel assembly includes a light emitting panel member received in a cavity or recess in a tray or housing. The panel member has a pattern of light extracting deformities on or in at least one surface of the panel member to cause light received from at least one LED light source positioned near or against the light entrance surface of the panel member to be emitted from a light emitting surface of the panel member. The tray or housing acts as an end edge and/or side edge reflector for the panel member to reflect light that would otherwise exit the panel member through the end edge and/or side edge back into the panel member for causing additional light to be emitted from the panel member.

Abstract: Light emitting panel assemblies include a light emitting panel member having at least one light source optically coupled to a portion of an input edge of the panel member. A plurality of individual light extracting deformities on or in at least one panel surface of the panel member are of well defined shape and have a length and width substantially smaller than the length and width of the panel surface. At least some of the deformities have at least one surface that is angled at different orientations relative to the input edge depending on the location of the deformities on the panel surface to face a portion of the input edge to which a light source is optically coupled.

Abstract: A liquid crystal display device 700 has a liquid crystal panel 701 and a backlight module 70 under the liquid crystal panel for providing light beams to the liquid crystal panel. The backlight module includes at least one light source 720, and a light guide plate 711. The light guide plate has an incident surface 710 for receiving light beams from the at least one light source, an emitting surface 712 adjacent the incident surface, and a bottom surface 713 opposite to the emitting surface, at least one brightness enhancing pattern being provided at the bottom surface. The at least one brightness enhancing pattern has a plurality of brightness enhancing element 714, each of which is an arcuate and generally subtending the at least one light source.

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 plate-shaped light guide for a planar light source device that guides a light emitted from a primary light source includes a light incident end face, a light emitting face and a back surface on the opposite to the light emitting face, wherein a plurality of first elongated lenses having an average slant angle of 0.5 to 60° are continuously or intermittently formed on one of the light emitting face and the back surface, and at least a portion of a surface of each first elongated lens, or at least a portion of the other one of the light emitting face and the back surface, or at least the portion of the surface of each first elongated lens and at least the portion of the other one of the light emitting face and the back surface includes a rough surface having an average slant angle of 0.1 to 80°.

Abstract: A night lamp includes a main body and a light distribution unit, which allows the passage of light and is fitted onto the main body. The thickness of the light distribution unit gradually increases from the bottom to the top. The light distribution unit has an arcuate front surface. A sunken design is provided in the front surface of the light distribution unit and the thickness of the sunken design gradually increases from the bottom to the top. A plurality of light refractive pieces are provided on the front surface and periphery of the sunken design. When light is generated by the light generating units, light may be evenly distributed in the light distribution unit and hence the light distribution unit may deliver evenly distributed light so that light may reach a broader range.

Abstract: A planar light source includes a large variable width of an irradiation angle of illumination light, a display device having a large variable width of an angle of field that uses the planar light source, a portable terminal device that uses the display device, and a ray direction switching element that is incorporated in the planar light source. A beam direction regulating element (a louver), which controls a direction of light, and a transparent and scattering switching element, which can switch the transparent state and the scattering state according to ON and OFF of an applied voltage, are provided between a backlight and a liquid crystal panel, whereby it is possible to increase a variable width of an irradiation angle of light in the planar light source and increase a variable width of an angle of field of the liquid crystal display device that uses the planar light source.

Abstract: A spread illuminating apparatus is provided which includes: a light conductor plate having a light inlet surface and two major surfaces; a light source unit disposed at the light inlet surface of the light conductor plate; and a light diffuser pattern disposed at the lower major surfaces of the two major surfaces of the light conductor plate, wherein the light source unit includes first and second white light sources which have respective different light emitting principles, are arranged in the width direction of the light conductor plate with their respective ends set close to one another, and which can be turned on and off independently of each other.

Abstract: A polarized light guide plate (LGP), and a method of manufacturing the polarized LGP are provided. The polarized LGP includes: a light source; a first layer that guides light emitted from the light source; a second layer disposed on the first layer and including a first emission unit having repetitive patterns extending in a first direction away from the light source; and a third layer formed of an optically anisotropic material and disposed on the second layer, having an emission surface through which light is emitted, and including a second emission unit disposed on the emission surface and having repetitive patterns arranged in a second direction perpendicular to the first direction.

Abstract: Light emitting panel assemblies include a light guide having a pattern of individual deformities of well defined shape that are projections or depressions on or in at least one side of the light guide. At least some of the deformities are quite small in relation to the width and length of the light guide and have two or more surfaces that come together to form ridges. At least some of the ridges are nonlinear over a majority of their length and have opposite end points that intersect the light guide or other deformities where the ridges end.

Abstract: A backlight module includes at least a light guide board, a reflector film, an optic film, and a light scarce. The light guide board has a light emitting surface on which a plurality of light: converging elements is formed. The optic film has a surface on which a plurality of rib-like micro light guides is formed. Each micro light guide includes a plurality of ridges, which are of different heights and show variation of height. Either a high ridge or a low ridge of the micro light guide is made a continuous left-and-right wavy configuration and/or a continuous up-and-down height-variation configuration. Thus, light transmitting through, the optic film and converged by the micro light guides leaves the optic film in a form that is not very regular so as to facilitate subsequent use of the light in for example a liquid crystal display panel.

Abstract: A backlight assembly, usable in a display device, includes a plurality of light sources and a light guiding plate guiding light emitted from the light sources, wherein the light sources are arranged corresponding to a side of the light guiding plate and the side includes a central portion. The light sources include first light sources as a first group arranged on the central portion of the light guiding plate, and second light sources as a second group adjacent to the first group, wherein a pitch of the first light sources is smaller than a pitch of the second light sources.

Abstract: A light collection system includes at least one light source, a light tunnel having reflective walls and a collimating plate at the light output end of the tunnel. The collimating plate includes an optical element array. The element array receives the light emitted from the light source and outputs part of the light at a desired cone angle and reflects the remainder back into the tunnel toward the light source. The light is “recycled” in the tunnel until the light either exits the collection system through the collimating plate or gets absorbed within the collection system.

Abstract: In a particular embodiment, the louver device includes a transparent layer of material having a first surface and, parallel thereto, a second surface. A plurality of shaped louver members are disposed within the transparent layer of material. The shaped louver members are aligned to receive light entering the first surface at a first angle relative to the first surface and direct the light out the second surface at a plurality of angles relative to the second surface.

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: An optical substrate includes an exit face through which a light entered from an incident face is emitted, a lens forming region provided on the exit face and in which a plurality of microlenses are formed, and a non-lens forming region provided in an area other than the lens forming region on the exit face and surrounded by the microlenses. The microlenses diffuse and emit the light entered through the exit face. The non-lens forming region is used to identify a predetermined direction of the substrate.

Abstract: A guide plate has a back face provided with a great number of micro-reflectors which has a guide portion and a conversion output portion including a valley. The conversion output portion reflects twice input light P at inner slopes, generating inner output light Q directed obliquely as to be distant from an incidence end face. Inner output light Q is inner-incident to a slope of projection row PR on an emission face, with the result that some of the inner-incident light becomes a direct escaping light and much of the other reaches the emission face again after travelling along various paths. At the second time or later chances of escaping, an actual escaping occurs to generate an indirect escaping light. A mixed emission suitably blended of the direct and indirect light is directed to directions, which are modified to directions around a roughly frontal direction by prism sheet PS before being supplied to a LCD panel or the like to be illuminated.

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 light guiding strip and a backlight module and display using the same are provided. The light guiding strip of the present invention includes a plurality of light reflecting surfaces and a plurality of light emergent surfaces. Each of the light reflecting surfaces has a light diffusion pattern. The light guiding strip of the present invention has the advantages of light weight, wide LED pitch, low cost, thickness and so on.

Abstract: An exemplary backlight module (1) includes a light source (11) and a light guide plate (12). The light guide plate includes a light incident surface (121) to which the light source is placed adjacent, and a bottom surface (122) adjacent the light incident surface. The bottom surface defines a plurality of recesses (1222). Each recess defines a first slant (101) facing the light source and an arris (103) at a top of the first slant. The arris of the first slant at each recess is aligned substantially perpendicular to a main path of light beams that propagate from the light source to the recess.

Abstract: An optic film includes a surface on which a plurality of densely distributed rib-like light guides is formed. Among the light guides, some are straight linear, while the others are of a continuous left-and-right wavy configuration. Thus, when light passes through the optic film and is converged thereby, the converged light is not completely in a regular distribution. In a backlight module using the optic film, light emitted from the backlight module does not cause diffraction and thus interference pattern is prevented from occurring.

Abstract: The invention is an illumination system that incorporates a light emitting diode and a side-emitting light-recycling lens. The side-emitting light-recycling lens recycles part of the light internally generated by a light emitting diode back to the light emitting diode as externally incident light. The light emitting diode reflects a portion of the recycled light, thereby increasing the effective brightness of the light emitting diode. The light reflected by the light emitting diode is directed though the side-emitting light-recycling lens and exits the illumination system, thereby increasing the output brightness and efficiency of the illumination system. The light emitting diode reflects externally incident light with a reflectivity greater than 40 percent.

Abstract: An exemplary light guide plate (500) includes: a light incident portion (51) for receiving a light; a light reflecting portion (52) for reflecting the light input through the light incident portion; and a light emitting portion (53) opposite to the light reflecting portion, for outputting the reflected light. The light incident portion includes a first diffractive optical element (512) located thereat. The first diffractive optical element includes a plurality of protrusions (512a) each having a curved surface, with the protrusions being arranged symmetrically opposite to each other across a central axis of symmetry of the first diffractive optical element. The light emitting portion may include a second diffractive optical element (532) located thereat. The second diffractive optical element includes a plurality of elongate protrusions, with the protrusions being arranged symmetrically opposite to each other across a central axis of symmetry of the second diffractive optical element.

Abstract: A double-side illumination apparatus includes a light source, an isotropic light guide plate including an incident plane on which light emitted from the light source is incident, an opposite plane facing the incident plane, and upper and lower surfaces through which the light is out-coupled. Isotropic micro-structures are formed on the upper and lower surfaces of the isotropic light guide plate, respectively, and first and second anisotropic layers are respectively formed on the upper and lower surfaces of the isotropic light guide plate so as to completely cover the isotropic micro-structures. Herein, the first and second anisotropic layers have different refractive indices with respect to light having first and second polarization components that are perpendicular to each other.

Abstract: Provided is a backlight unit for a key of an input device. The unit includes a light guide plate and at least one light emitting unit. The light guide plate is formed of flexible transparent resin and has a light guide pattern portion in which a plurality of engraved patterns are formed in a plurality of requirement character shapes so that light can be diffused and scattered at desired luminance from a necessary light emitting portion, using a minimal number of light sources. The light emitting unit is installed at a side wall of the light guide plate.

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.