Abstract: A spread illuminating apparatus includes: a point light source; a light conductor plate having a prism array formed at a side surface thereof at which the point light source is disposed; a frame which houses the point light source and the light conductor plate and which includes an elastically active area to urge the light conductor plate toward the point light source; and a heat-resistant transparent spacer which is composed of an elastic layer preferably made of heat resistant silicone rubber and a non-elastic layer made of polyethylene terephthalate and which is disposed between the point light source and the prism array of the light conductor plate such that the elastic layer makes contact with the point light source and the non-elastic layer makes contact with the prism array.

Abstract: An optical element comprises at least one optical film wherein at least a portion of the optical film is maintained dimensionally stable by the presence of a mechanism for application of a controlled tensile force to the film wherein the tensile force is applied through a tensioning mechanism protruding through holes or slots in the optical film.

Abstract: A light source of side-edge type light-emitting diode (LED) backlight unit for using in a liquid crystal display (LCD) comprises a substantial LED bar, at least one primary LED set preset as the light source of the LCD, and at least one backup LED set. The primary LED set(s) and backup LED set(s) are composed of a plurality of LED and disposed at the LED bar, and a backup LED set will be enlightened and substituted for one primary LED set as the light source when the primary LED set is broken-down so that the light source for the LCD is maintained at constant levels.

Abstract: This invention relates to a backlight unit that prevents a wrinkle of an optical sheet, and a liquid crystal display module using the same. A backlight includes at least one light source. A light guide panel converts a light from the light source into a surface light. A housing receives the light source, and has an open part that is opened to a light incidence surface of the light guide panel and one end overlaps with at least a part of the light guide panel. A main support encompasses side and upper surfaces of the housing. Optical sheets disposed on the light guide panel, wherein the optical sheets have one ends disposed between the light guide panel and the one end of the housing.

Abstract: Color non-uniformity due to LED light sources of a liquid crystal display (LCD) device is improved. A light quantity control film is arranged between an LED source and the entrance surface of a mixing light guide plate. This light quantity control film is arranged in the part which reduces the quantity of light of the LED with the strongest light quantity among a plurality of same colors.

Abstract: An optical element comprises a stack of at least three juxtaposed films with at least one inner optical film and two outer transparent films exhibiting high dimensional stability, wherein a controlled tensile force is applied in at least one direction to the two outer films but not the at least one inner film.

Abstract: A backlight module is provided. The backlight module includes a light guide plate, an optical component, and a light source for generating light. The optical component is provided for adjusting or veering the light emitted from the light source along a direction perpendicular to the light guide plate. One end of the optical component is affixed to the light source for receiving the incident light. The other end of the optical component faces, and is separated from, the light guide plate, so as to direct the light to the light guide plate.

Abstract: A surface light source includes a prism sheet placed on one side of a liquid crystal display panel, and having elongated prism portions formed to form a patterned indented entrance surface having an angular cross-section, and an exit surface. A reflecting plate is placed to face the prism sheet through a space. First and second light source units are disposed on two end sides. A control unit sequentially writes left-eye image data and right-eye image data on respective pixels of the display panel, causes the light source unit on the right side when viewed from an observation side of the surface light source to emit light in synchronism with the writing of the left-eye image data, and causes the light source unit on the left side to emit light in synchronism with the writing of the right-eye image data.

Abstract: An optical sheet includes a base layer, a light-condensing layer and a plurality of light-reflecting portions. The light-condensing layer includes a plurality of light-condensing portions formed on a second surface of the base layer along a first direction crossing a longitudinal side and a vertical side of the optical sheet that meet each other at the second surface. The light-condensing portions are extended in a second direction crossing the first direction to be tilted with respect to the longitudinal side and the vertical side. The light-reflecting portions are formed in the first surface corresponding to a plurality of recesses where the light-condensing portions meet each other to be formed in the second direction. The center of the light-reflecting portion is spaced apart from the recessed in the first direction. Thus, a plurality of optical sheets such as a diffusion sheet and a light-condensing sheet may be omitted.

Abstract: A display device is provided. The display device comprises a light guide plate; a first light source being disposed at a side of the light guide plate and having a first half-power angle; a second light source being disposed at the side of the light guide plate and having a second half-power angle; and a display panel on the light guide plate.

Abstract: A spread illuminating apparatus is provided where: a light introducing prism mechanism is formed at a light entrance surface of a light guide plate wherein the prism mechanism includes a plurality of prism pieces extending in the thickness direction of the light guide plate and including first and second light incidence faces which have respective different inclination angles relative to the light entrance surface such that the first and second light incidence face are inclined relative to the light incidence surface at an angle ranging from 0 degree to 30 degrees and at an angle ranging from 45 degrees to 90 degrees; a light emitting pattern is formed at the bottom surface of the light guide plate such that prisms are continuously disposed in a step-like manner in the direction perpendicular to the light entrance surface; and a light diffusing pattern is formed at the top surface of the light guide plate such that arc prisms are disposed in the direction parallel to the light entrance surface.

Abstract: A LED illumination device includes a tapered light guiding member, a LED, a reflective polarizer and a quarter-wave retarder. The light guiding member includes a light input surface and an opposite light output surface. The LED includes a LED chip and a reflective substrate on which the LED chip is mounted. The LED chip faces toward the light input surface. The reflective polarizer faces toward the light output surface, and allows a first polarization light to pass therethrough and reflects a second polarization light back into the light guiding member. The quarter-wave retarder is provided between the LED and the reflective polarizer. The reflective substrate reflects the second polarization light reflected by the reflective polarizer so as to make the second polarization light convert into the first polarization light after the light passes through the quarter-wave retarder a plurality of times.

Abstract: A backlight module includes a light box, at least one light guide tube, and at least one light source. The light box has a light exit side. The light guide tube has a plurality of microstructures which are spaced apart along a length of the light guide tube. The light guide tube and the microstructures are disposed in the light box in a particular arrangement so that the microstructures are placed substantially in a matrix array within the light box. The light source is disposed adjacent to the light guide tube, and is operable so as to emit a light beam to the light guide tube. The microstructures disperse the light beam from the light guide tube.

Abstract: An object of the invention is to provide a thin, low-power consumption, light-weight, and inexpensive surface light emitting apparatus using a hollow multilayer structure in combination with LEDs, and a method of light emission for the same. More specifically, the invention provides a surface light emitting apparatus comprising: a hollow multilayer structure formed from a plurality of hollow cells; a light source for emitting light into the hollow multilayer structure through an end face thereof containing a cell opening; and optical means for causing the light introduced through the cell opening-containing end face of the hollow multilayer structure to emerge from a surface of the hollow multilayer structure.

Abstract: An edge light display unit includes light generating sources, a substrate mounting the light generating sources, a lens, a diffusion plate expanding light input in a side surface of the diffusion plate as to irradiate a front surface of the diffusion plate, and a heat sink thermally contacted with the substrate. A base portion of the heat sink has a substrate mounting surface and a fin constituting surface substantially perpendicular to the substrate mounting surface. At least one fin extends from the fin constituting surface in a direction substantially perpendicular thereto and along the plurality of light generating sources in a direction parallel to substrate. An air supply and exhaust surface of a cooling air are formed in a back surface side of the display unit.

Abstract: An area light source comprising an LED primary light source (2), a plate-like light guide (4) and a light deflector (6) is provided with a direct light incoming prevention means closed of a light-blocking member (9). The light guide (4) has a light incoming end face (41) and a light outgoing face (43) and guides a light emitted from the LED primary light source (2). The light deflector (6) is arranged adjacently to the light outgoing face (43) and has a light entering face (61) and a light exiting face (62). The direct light incoming prevention means prevents a light, which is emitted from the LED primary light source (2), from entering into the light deflector (6) without passing through the light guide (4). The light-blocking deflector (9) is disposed on a first region of the light outgoing face (43) which is located near the edge of the light incoming end face side of the light outgoing face (4).

Abstract: An emission face of a light guide plate is divided into two portions, a first emission part having a large area and a second emission part having a small area, by a straight line extending from a generally lateral-center position of the incidence face perpendicularly to the incidence face. A slope is formed on the emission face in the vicinity of the incidence face. The slope is formed so that thickness of the light guide plate decreases from a side end portion of the first emission part toward a side end portion of the second emission part in a cross section vertical to the straight line. Further, thickness of the light guide plate may decrease gradually according to an increasing distance along the straight line from the incidence face.

Abstract: A backlight assembly removing dark areas and a display device including the backlight assembly are provided. The backlight assembly includes a light source to emit light, and a light guiding plate which receives and guides the light emitted from the light source. A light diffusing area is formed in a light incident portion of the light guiding plate.

Abstract: A backlight module (70) includes a light guide plate (72), a light source (74), a micro reflector array (723), and a reflector (76). The light guide plate includes a light input surface (722) facing the light source, a light output surface (724) adjacent to the light input surface, and a reflective surface (726) opposite to the light output surface. The light source and an emitting surface (744) thereof both face the light input surface. The micro reflector array and the reflector are configured for cooperatively coupling a first portion of the light beams into the light input surface via any corresponding microgap and reflecting a second portion of the light beams into the light guide plate at a location distant from the light source.

Abstract: A display apparatus includes a panel, a first light source, a second light source, a first light guide plate, a second light guide plate, and a processor. The panel includes a first area for displaying a first data and a second area for displaying a second data. The first light guide plate corresponding to the first area reflects the light provided by the first light source to the first area. The second light guide plate corresponding to the second area reflects the light provided by the second light source to the second area. The processor determines the states of the first light source and the second light source. The first or second light source is not operated all the time so as to conserve the power.

Abstract: An apparatus having a light source, light pipe, and light conversion layer is disclosed. The light source includes a plurality of LED dies arranged in an array, each LED emitting light having an excitation wavelength, the light source emitting light within a cone of angles. The light pipe is positioned to receive the light within the cone of angles through an edge surface such that the light within the predetermined cone of angles is totally reflected from the top surface. The light pipe has features that redirect some of the light at angles such that some of the redirected light exits through the top surface. The light conversion layer overlies the top surface and converts light of the excitation wavelength to light in an output spectrum having wavelengths different from the excitation wavelength. A display layer can be placed such that it is illuminated by light from the light pipe.

Abstract: A backlight module including a light guide plate, a light source and a transparent elastomer is provided. The light guide plate has a first light emitting surface, a bottom surface opposite to the first light emitting surface and at least a light incident surface contacting the first light emitting surface and the bottom surface. The light source is disposed adjacent to the light incident surface and includes a circuit board and a plurality of light emitting diode devices. Each of the light emitting diode devices is capable of emitting light passing through the light incident surface. The light emitting diode devices are electrically connected to the circuit board. The transparent elastomer is disposed between the light incident surface and each of the light emitting diode devices.

Abstract: An apparatus for manufacturing a printed light guide plate includes a working platform (23), and a heater (24) coupled to the working platform. A transparent slab (21) is disposed on the working platform. The purpose of coupling the heater to the working platform is to maintain the transparent slab a constant temperature in the range from about 40° C. to about 45° C., such that as few water molecules as possible are absorbed into the transparent slab. The quality of the manufactured printed light guide plate is thus improved.

Abstract: There is provided a light emitting diode (LED) backlight device comprising a light guide plate and a light module composed of a plurality of LEDs. A haze structure is disposed between a light incident surface of the light guide plate and each LED. Haze value of the haze structure is varied with a high value at a position closing to an optical axis of the LEDs and a low value at a position further away from the optical axis of the LEDs.

Abstract: A backlight module and an application thereof are disclosed. The backlight module comprises at least one light source and a light guide plate. The light guide plate is disposed at one side of the light source, wherein the light guide plate has a reducing region formed at one side of the light guide plate and close to the light source. The thickness of the light guide plate in the reducing region is decreased with the increasing distance away from the light source. The backlight module is applicable to a liquid crystal display (LCD) apparatus.

Abstract: A backlight unit and a liquid crystal display having the backlight are provided. The backlight unit includes a plurality of light emitting diode (LED) chips, a light guide plate for converting light generated from the LED chips into surface light, and a plurality of optical guide modules corresponding to the respective LED chips and disposed between the LED chips and the light guide plate.

Abstract: A backlight unit capable of reducing or effectively preventing a hot spot phenomenon includes a plurality of light sources generating lights, a light guide plate including a portion on which the lights generated from the light sources are incident and converting the lights incident on the portion into a surface-shaped lights and a light path converter converting a traveling direction of the lights incident on the portion of the light guide plate in an area where the lights emitted from the light sources diodes overlap each other.

Abstract: A low-profile edge-lit backlight apparatus includes a light guiding plate which guides light introduced from a side by utilizing total reflection on a light emitting surface as one principal surface and a light reflecting surface as the other principal surface and emits light from the light emitting surface based on surface emitting, and a plurality of white light emission units that emit white light incident on the light guiding plate. The white light emission section includes a light source group of a first light emitting diode to emit first primary color light, a second light emitting diode to emit second primary color light, and a third light emitting diode to emit third primary color light which are arranged in a row, and a color mixing section that generates white light by mixing the first primary color light, the second primary color light, and the third primary color light.

Abstract: An optical member is disposed between an optical sheet and a pair of middle chassis and top chassis that securely support an edge of an liquid crystal panel and an edge of the optical sheet. The optical member reflects light emitted from light-emitting diodes at high reflectivity so that an amount of light loss through the edge of the optical sheet is reduced. This allows for higher light utilization efficiency, thereby enhancing the brightness.

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 first protrusions, a plurality of second protrusions and a lamp-receiving portion. The second surface is opposite to the first surface. The first protrusions are formed at the first surface, and each first protrusion is a rectangular pyramidal protrusion. The second protrusions are formed at the second surface, and each second protrusion is a conical frustum protrusion. 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: LEDs (light sources) are disposed in a row in the width direction of a light-guiding plate near the edge surface of the light-guiding plate. In the edge surface of the light-guiding plate, diffractive optical elements (DOEs) are disposed to face the LEDs, respectively. These DOEs are constituted of binary concave and convex patterns, and the diffusion angle of the DOEs disposed near the center is set smaller than that of the other DOEs disposed near the edge.

Abstract: A method of manufacturing a micro-lens array and light-emitting device, comprising forming a first structured polymer film with close packed surface cavities having a mean diameter of less than 20 micrometers and a relatively lower surface energy surface, forming a transparent second structured film with an array of microlenses formed thereon corresponding to the cavities of the first structured film, wherein the second structured film comprises a relatively high surface energy material and has a refractive index greater than 1.45, and wherein the microlenses are randomly distributed, separating the second structured film with the micro-lens array from the first structured polymer film, and attaching the second structured film to a transparent substrate or cover of a light-emitting device through which light is emitted.

Abstract: An illumination unit includes a light guide plate, and at least one optical sheet which is disposed on a major surface of the light guide plate. The optical sheet includes bent portions which are formed by bending portions of the optical sheet at a pair of opposed sides, and the light guide plate includes, at a pair of opposed end surfaces, recess portions in which the bent portions are inserted.

Abstract: A linear light source includes light emitting elements 5 which are arranged on a square rod-shaped printed board 4 along the longitudinal direction thereof and reflectors 6 which are arranged alternately with the light emitting elements 5. The opposing surfaces 6a of the reflectors 6 sandwiching the light emitting element are inclined such that the distance between the opposing surfaces of the reflectors increases in the direction of light emitted from the light emitting element 5. The linear light source further includes resin seal layers 10 which are in the form of a trapezoidal prism or a truncated pyramid and formed by filling recesses, each of which is defined by the printed board 4, light emitting element 5 and reflectors 6, with a light-transmissive resin sealant. A strip-shaped reflection member made of a reflection sheet 1 or a vapor-deposited film 12 is arranged to cover a region ranging from the end face of the printed board 4 adjoining to the component side to the tips of the reflectors 6.

Abstract: Area light source 10 used for LCD device 1 includes light guide 12 and LED devices 18 and 19 disposed at a side portion of light guide 12. A light receiving portion at a side edge portion of light guide 12 is provided with prisms 24 and 25 of saw-tooth prism group 22. Apex angles of prisms 24 and 25 are set to be more acute up to the middle point of prisms 24 and 25 as prisms 24 and 25 are farther from LED devices 18 and 19, respectively.

Abstract: A backlight module (20) includes a light guide plate (21) and two light emitters (22). The light guide plate includes an emitting surface (212), a bottom surface (213) opposite to the emitting surface, a plurality of side surfaces interconnecting the emitting surface and bottom surface, and an incident surface (211) disposed at a corner portion thereof adjoining to two adjacent side surfaces. The light guide plate defines a through hole (23) in the corner portion adjacent to the incident surface. The two light emitters are adjacent to and face the incident surface.

Abstract: Polymerizable compositions comprising particularly useful for brightness enhancing films.

Abstract: A high brightness diffusion plate for homogenizing light beams provided by at least one light source of a backlight module to a display panel is provided, which includes a diffusion layer, a transmittance layer, and a plurality of connecters. The transmittance layer is disposed above the diffusion layer, and the connecters are connected between the diffusion layer and the transmittance layer. Since the high brightness diffusion plate of the present invention is an integrated structure and is stronger, the present invention is not only easier for being assembled inside the backlight module, but also makes the light source provided by the backlight module being more homogeneous.

Abstract: A signage device comprising one or more light sources, a waveguide or arrangement of waveguides and photoluminescent features coupled thereto. In one embodiment, a waveguide is adapted to receive light of a first wavelength and the photoluminescent features are adapted to emit light of a second wavelength in response to receiving light of the first wavelength.

Abstract: There is provided an optical diffuser sheet. The optical diffuser sheet has a first surface and a second surface opposite to the first surface. The first surface has a plurality of optical structures arranged to diffuse and direct light illuminated onto the first surface. The optical diffuser sheet when illuminated is characterized by an absorption of less than 10% and an absolute hiding power of less than 10%.

Abstract: A light-guiding plate, an optical source device and an electronic device. The light-guiding plate including an incident surface, and an emission surface substantially perpendicular to the incident surface. The incident surface has a surface substantially perpendicular to the incident surface, and has projections or depressions extending substantially parallel to the emission surface. The incident surface has flat planes among the projections or depressions.

Abstract: Overlapping first and second light guide plates have incidence faces located opposite to each other. Each light guide plate has an emission restraint region, an emission gradually-increasing region and an emission promotion region arranged in order from incidence face toward distal end face. In each emission gradually-increasing region, emission light quantity increases gradually away from each emission restraint region toward each emission promotion region. The emission gradually-increasing regions of the light guide plates overlap each other. The emission promotion region of the second light guide plate overlaps with the emission restraint region of the first light guide plate while the emission restraint region of the second light guide plate overlaps the emission promotion region of the first light guide plate. Light from LEDs is limited by windows. Color-mixing of the LED-light occurs in each emission restraint region to become whitened light gaining emission intensity in the emission promotion regions.

Abstract: The present invention relates to a backlight apparatus and a liquid crystal display apparatus, capable of realizing a backlight apparatus having high color reproductivity without color irregularities in a backlight apparatus having a LED device as its light source. In the optical unit 61, there are disposed the dichroic mirror B which transmits green light Lg and red light Lr and reflects blue light Lb, the dichroic mirror G which transmits the light Lb and the light Lr and reflects the light Lg, and the dichroic mirror R which transmits the light Lb and the light Lg and reflects the light Lr, and they transmit or reflect the light emitted from the LED devices 11B, 11G and 11R to mix to form the white light Lw. The light Lw formed by the dichroic mirrors B, G and R is entered to the light guiding plate 62 by the mirror performing a total reflection.

Abstract: An optical element comprises a stack of at least three juxtaposed films with at least one inner optical film and two outer transparent films exhibiting high dimensional stability, wherein a controlled tensile force is applied in at least one direction to the two outer films but not the at least one inner film.

Abstract: A high efficiency illumination device has a light guide with a light entrance for converting entering lights into lights exiting through light exit surfaces. Numerous light emitting elements are arranged near the light entrance. A mounting mechanism is interposed between the light emitting elements and the light entrance for affixing them to each other. For each light emitting element, the mounting mechanism also includes an integrated lens for collecting and collimating lights emanated from the light emitting element into the light entrance. In one embodiment, the illumination device further includes an anti-reflection layer placed between the integrated lens and the light entrance to minimize light loss due to Fresnel reflection at the interface between them. The anti-reflection layer can be made of a transparent and non-evaporating liquid material to form an intimately conforming, long lasting air-free bridge between the integrated lens and the light entrance.

Abstract: An illumination device for a flat panel display may include a light-guiding member for guiding light from a light-emitting lamp, wherein the light-emitting lamp has a light-emitting device incorporated in a lamp body, wherein the lamp body has a reflection surface that reflects light from the light-emitting device and an emitting surface that is opposite to the reflection surface and irradiates the reflected light from the reflection surface toward the light-guiding member. In certain example embodiments, the emitting surface is formed into a shape along the irradiated surface of the light-guiding member and the reflection surface is formed to be curved such that the reflected light is made approximately parallel seen from one direction upon reflecting the light from the light-emitting device.

Abstract: A backlight module includes a light guide plate having an incident surface, an emitting surface adjacent to the incident surface, and a reflective surface opposite to the emitting surface. At least one light source is disposed adjacent the incident surface. The light source has a luminescent surface; and at least one reflecting device is disposed adjacent the light source. The reflecting device has a reflective surface facing the incident surface. At least one semi-transmissive and semi-reflective film disposed on the incident surface of the light guide plate. The semi-transmissive and semi-reflective film and the reflecting device together are disposed for cooperatively reflecting some (i.e., a fraction) of the light beams emitted from the light source and redirecting the fraction of the light beams into the light guide plate through the incident surface, distant from the light source.

Abstract: A light guide board includes an incidence surface, an emitting surface, and a reflection surface. The incidence surface is frosted and has a roughness-enhanced zone corresponding in location to a light source. The emitting surface forms micro-structures on portions adjacent to the incidence surface and two opposite end surfaces. The portions of the emitting surface forming the micro-structures have magnitude increased roughness as compared to portions that are not provided with micro-structures so that light transmitting through the micro-structures is subject to further diffusion. The reflection surface forms a plurality of prisms extending from the incidence surface with a small (shallow) depth to an opposite surface with a large (deep) depth, with the height of the prisms increasing with the length thereof so that the prism surface of the prisms changes from minimum to maximum, which ensures uniformity of the light emitted from the light guide board.

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 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.