Abstract: An incidence face is formed at a corner portion of a light guide plate having a generally rectangular emission face, being supplied with primary light form a primary light source. The incidence face has a configuration which obtained by applying undulation-modification to an imaginary incidence face that cuts off the corner portion obliquely. This undulation-modification gives the incidence face first and second incidence regions. The first incidence region is provided with unevenness that produces an inner propagation light having a diverging angle greater than that which would be obtained under an imaginary case where primary light was refracted on incident to the imaginary incidence face. The second incidence region is provided with slopes inclined with respect to the imaginary incidence face, causing the emission face to have a reduced unbalance in brightness.

Abstract: The invention relates to a light redirecting film comprising a thin optically transparent substrate having opposite sides, one side of the substrate substantially covered by elongated individual optical elements whose longest dimensions are substantially aligned in a lengthwise direction, wherein the shape of at least some of the optical elements have a visually significant difference, and wherein the layout of optical element shapes and locations is such that objectionable patterns are not visible in the film under standard LCD backlight viewing conditions.

Abstract: An exemplary backlight module (22) includes a light guide plate (23), a light source (27) adjacent to a lateral side of the light guide plate, a reflector (25) under the light guide plate, and an optical dot sheet (24) between the light guide plate and the reflector. The optical dot sheet includes a transparent film (241), and numerous optical diffusion dots (244) formed on a surface of the transparent film that is adjacent to the light guide plate.

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 optical diffusing sheet includes a body and a plurality of light-shielding dots. The light-shielding dots are disposed on a surface of the body and are adjacent to an edge of the body. At least a portion of the adjacent light-shielding dots have different intervals. A backlight module including the optical diffusing sheet is also disclosed.

Abstract: A prism sheet, a backlight assembly having the prism sheet, and an LCD device having the prism sheet, the prism sheet includes a first surface, a second surface and a reflecting member. A light is incident upon the first surface. The second surface includes a prism pattern. The incident light exits through the second surface. The reflecting member is provided on the first surface to partially reflect irradiated light that is received on the first surface.

Abstract: An edge-type backlight module includes a light source, a light guide plate installed on a lateral side of the light source, and a brightness enhancement film disposed above the light guide plate. The brightness enhancement film includes a plurality of micro-structures on a bottom surface connected to a top surface of the light guide plate in an adhesion manner or a hot melt manner.

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: Provided are embodiments of an optical sheet and backlight assemblies incorporating the optical sheet. The optical sheet can include a body and a plurality of protrusions. The protrusions are arranged on a surface of the body. A furrow pattern in which furrows are arranged is formed on the protrusion for scattering light.

Abstract: The invention relates to a moonroof for a motor vehicle, the moonroof comprising a transparent wedge-shaped essentially solid body having a surface that is to be turned toward an interior space of a motor vehicle, and having a surface opposite the surface that is to be turned toward the interior space of the motor vehicle, the surface that is to be turned toward the interior space of the motor vehicle being inclined to the surface opposite the surface to be turned toward the interior space of the motor vehicle and the moonroof comprising a light source for introducing light into the transparent wedge-shaped essentially solid body.

Abstract: An optical sheet, a backlight device, and a liquid crystal display device are provided. The beam-condensing optical sheet includes a large number of irregularity portions arranged on one main surface of a light-transmissive base, in which a pitch of arrangement of the irregularity portions is 110 ?m or more and 330 ?m or less, and surface roughness (Ra) of the irregularity portion is 0.1 ?m or less.

Abstract: A light guide containing substantially aligned non-spherical particles provides more efficient control of light scattering. One or more regions containing ellipsoidal particles may be used and the particle sizes may vary between 2 and 100 microns in the smaller dimension. The light scattering regions may be substantially orthogonal in their axis of alignment. Alternatively, one or more asymmetrically scattering films can be used in combination with a backlight light guide and a reflector to produce an efficient backlight system. The light guides may be manufactured by embossing, stamping, or compression molding a light guide in a suitable light guide material containing asymmetric particles substantially aligned in one direction. The light scattering light guide or non-scattering light guide may be used with one or more light sources, collimating films or symmetric or asymmetric scattering films.

Abstract: The present invention relates to a reflector for a back light assembly and a back light assembly using the same. A reflector for a back light assembly for use in an LCD device comprises a base film; a protrusion of elastic material provided on a surface of the base film; and a reflecting layer deposited on the base film and the elastic protrusion, for reflecting light. With this configuration, the back light assembly prevents damage or deformation due to friction or impact between a light guide plate and the reflector and enhances the brightness of an LCD device.

Abstract: An optical sheet (20) includes a main body. The main body includes an incident surface (22), an emitting surface (23) at the opposite side of the incident surface, and a plurality of inverted pyramid depressions (24) formed on the emitting surface.

Abstract: A light guide panel usable with a backlight unit is capable of enhancing brightness uniformity and reducing light loss. The light guide panel includes a transparent plate one side of which is a plane of incidence. An interior of the light guide panel is divided by a plurality of planes inclined with respect to the plane of incidence, and each of the respective inclined planes is partial-reflection-coated.

Abstract: A backlight assembly includes a frame, a light source, and at least one optical film. The light source is disposed on the frame. The optical film has at least one positioning flange. The positioning flange includes at least two contact edges configured to abut against at least one edge of the frame in at least two directions to hold the optical film in place relative to the frame.

Abstract: The present invention provides a device that acts as an optical switch to control the intensity of a light beam through the action of a second control beam. This behavior is achieved through photoinduced anisotropy that develops in a monomolecular layer coating the inside surfaces of a liquid crystal cell. One of the surfaces is permanently aligned prior to assembly by illuminating the surface with polarized light in the presence of oxygen. The other surface retains reversible behavior, adapting anisotropy according to the orientation of the polarization of the control beam. Accordingly, an optically controlled liquid crystal light valve is provided that does not require contact-rubbing methods in order to permanently align one of the layers coating an inside surface of the cell.

Abstract: Optical devices such as backlight assemblies, according to the present invention include a multilayer optical film in which at least one of the layers comprises an oriented birefringent polymer. The multilayer optical film exhibits low absorptivity and can reflect light approaching at shallow angles as well as normal to the film.

Abstract: There is provided a surface light-emitting device capable of preventing an increase in power consumption even if the length of the light-emitting surface of the surface light-emitting device is greater than the width, and capable of emitting light uniformly without decreasing the brightness of the light-emitting surface nor increasing the height of the light guiding space. In the present surface light-emitting device, the incident plane (201) is one of two sides of the light guiding space (20) in opposition in the longitudinal direction. The light-transmitting plate (4) includes a diffusion filter (6) which covers a specific area of the surface of the light-transmitting plate (4) near the light source (3). The remaining area of the surface of the light-transmitting plate at a distance from the light source (3) is not covered with the diffusion filter (6). The diffusion filter (6) is formed of a laminate in which a plurality of diffuse transmission films are layered.

Abstract: The method of selecting a light redirecting film or optical panel includes the steps of providing a length of film or substrate having a pattern of optical elements that varies, then selecting an area of the film or substrate that has a pattern of the optical elements that best suits a particular application, and removing the selected area from the film or substrate to provide the light redirecting film or optical panel. The pattern may be a repeating pattern that varies at different locations on the film or substrate and may comprise a roll of the film or substrate from which the selected area(s) is removed.

Abstract: Cold cathode tube 22 is covered with lamp reflector 31. An edge portion on the side of incident light surface 26a of light guide 26 is interposed between upper and lower edge portions 31a and 31b of lamp reflector 31. Reflection sheet 29 is attached to the back surface 26b of light guide 26. Reflection sheet 29 is fixed on the front surface of frame 32 by adhesive tapes 41 for electric insulation. An interposing width of “A” where the edge portion on the side of incident light surface 26a of light guide 26 is interposed between upper and lower edge portions 31a and 31b of lamp reflector 31, which is larger than a gap of “B” defined between step portion 35 of frame 32 and edge 26d of light guide 26. With the structure arranged above, the edge portion on the side of incident light surface 26a of light guide 26 is firmly held between upper and lower edge portions 31a and 31b of lamp reflector 31.

Abstract: A light guide plate (3) includes a parallelepiped block. The block includes an input surface (31) for receiving light beams irradiated from a light source; two side surfaces perpendicularly adjoining the incident surface; an output surface (32) perpendicularly adjoining the incident surface and the side surfaces; and a bottom surface (33) opposing to the output surface. An array of prisms (34) is integrally formed on the output surface. Each prism is shaped as a square pyramid. All the prisms have a same size and are arranged contiguously with each other. Alternatively, the light guide plate may be a wedge-shaped block (3?). A rectangular array of prisms (34?) is integrally formed on an output surface (32?) thereof. Each prism is shaped as a square pyramid. The prisms are arranged contiguously with each other, and sizes of the prisms gradually decrease from a thick end to a thin end of the block.

Abstract: In a two-way backlight assembly and a two-way LCD apparatus, the two-way backlight assembly provides light emitted from one light source to a first direction where a main LCD panel is placed and to a second direction where a sub LCD panel is placed. Also, a sub mold part for receiving the sub LCD panel comprises a black-colored material so as to prevent reflection of the light. Accordingly, thickness and power consumption of the backlight assembly may be reduced and display quality may be also improved by preventing leakage of the light at ends of the sub LCD panel.

Abstract: An LED backlight module. The LED backlight module comprises a printed circuit board, a plurality of LEDs, and a light transmissive material. The LEDs are disposed on the printed circuit board. The light transmissive material is coated on the printed circuit board. Particularly, the LEDs are embedded in the light transmissive material and arranged in a matrix.