Abstract: The invention provides a light-emitting device and a method of illumination. The light-emitting device includes one or more semiconductor layers, a reflective bottom surface, and a top surface coupled to semiconductor layer. The semiconductor layers include an active region where a primary light is generated. The relative position of the top surface, the reflective bottom surface and the active region is adjusted to substantially transmit the primary light through the sides of the light-emitting device.

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: 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 surface light-source device of a display unit comprises a light source, light guide plates and reflector sheets. The light guide plate has an emission surface for emitting the light of the light source as planar light. The reflector sheet reflects the light of the light source, which has entered the light guide plate, toward the emission surface. At rear surfaces of the light guide plates, grooves and incline surfaces are formed. The grooves contain the light source. The incline surfaces have a V-shaped section and reflect the light of the light source, which has entered the light guide plate, toward the emission surface. The light guide plates are disposed such that the rear surfaces thereof closely confront each other so as to interpose the light source between the grooves.

Abstract: A white light generating unit includes an LED structure and a lens structure. The LED structure generates a light. The lens structure has a convex lens or a concave lens. The lens structure has a fluorescent member that receives the light from the LED structure to emit a white light.

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: A light guide plate comprises: a plate ember having a light transmitting capability; and a light incidence face provided on a side surface of the plate member; wherein the plate member changes a path of light emitted from a light source arranged to face the light incidence face and emits planar illumination light from an upper surface of the plate member onto an object to be illuminated; wherein an undulated surface portion is formed on the light incidence face. Further, the undulated surface portion is formed by smoothly connecting curved recessed portions and curved raised portions. This arrangement prevents bright lines from being produced near the light source and also prevents brightness variations, thus making uniform an intensity distribution of light that has entered the light guide plate.

Abstract: A light guide plate, for use with a back-light module for seasonal scanning in dividing zones, includes a light-pervious substrate having a plurality of dividing blocks formed thereon, an optical grating structure disposed on light incident surface of each of the dividing blocks for allowing light to enter, and a light diffusion structure disposed on an optical surface of each of the dividing blocks for diffusing the light. As the light-pervious substrate is adapted for seasonal scanning in different zones, the provision of the optical grating structure can shorten the light mixing distance while the light diffusion structure can evenly emit and spread the light throughout the light guide plate to solve the drawbacks of the prior techniques. Further, a back-light module having the light guide plate is provided.

Abstract: An edge-type backlight unit having a plurality of rows of red, blue and green LEDs to provide a light source. In the backlight unit, a light guide plate has a light incidence part formed on a side surface thereof to receive light, the light guide plate inducing the light from the light incidence part to be emitted through a top surface of the light guide plate. A light source is disposed near the light incidence part of the light guide plate, and includes a plurality of red, green and blue light emitting diodes along the light incidence part. The light emitting diodes are grouped into at least three rows according to color. Here, the row of the green light emitting diodes is arranged most adjacent to the top surface of the light guide plate.

Abstract: A back light device for use in a liquid crystal display device, which includes: at least one lamp; a light guide plate for guiding light emitting from the lamp; a diffusing sheet for diffusing light emitting from the light guide plate; at least one prism sheet located on the diffusing sheet, concentrating light; a protecting sheet located on the prism sheet; and a reflector located under the light guide plate, reflecting light directing downward the light guide plate. At least one of an edge portion of the diffusing sheet adjacent to the lamp, an edge portion of the protecting sheet adjacent to the lamp, and the reflector includes a printing portion made of colorless ink containing a light scattering agent.

Abstract: An installation to upgrade light source efficiency includes a dimmer disposed to the backlight module at where in relation to the route the light from light source travels; and the dimmer is related to an optical structure that is totally permeable and/or reflects light to upgrade light source efficiency and more effectively distribute streams of light emitted by the light source by eliminating those dim and dark belts found between any two neighboring light sources in a more active and initiative means to solve problems of lower light source efficiency and creating those dim and dark band as found with the prior art.

Abstract: An optical includes an optical body including a plurality of side faces where one of the plurality of side faces defines a light entrance face onto which a blue light is incident. A light exit face is connected to at least one of the side faces, and a yellow fluorescent layer is disposed on the light entrance face and is configured to convert the blue light into a white light.

Abstract: A back light module (100) includes a light guide plate (130), a number of light sources (110) at one side of the light guide plate, and a number of birefringent crystal assemblies (120) respectively located between the light sources and the side of the light guide plate. Each birefringent crystal assembly includes a generally wedge-shaped first birefringent crystal (121) and a generally wedge-shaped second birefringent crystal (122) adhered to each other back-to-back. The birefringent crystal assembly enlarges a radiation angle of optical beams emitted from the corresponding light source. The optical beams with enlarged radiation angles enter the side of the light guide plate, and help provide excellent uniformity of brightness to an associated liquid crystal display panel.

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. 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: A light guiding device to compensate insufficient lighting in a light guide plate's corner areas is provided. The light guiding device is positioned on the inner side of the lamp reflector neighboring to the electrodes at the ends of the lamp. The light guiding device has a reflection surface which reflects and directs lights toward the dim corner areas of the light guide plate, compensating the lighting and thereby reducing these dim areas.

Abstract: A liquid crystal display and a backlight module thereof are provided. The liquid crystal display includes a liquid crystal display panel and the backlight module disposed under the panel. The backlight module includes an optical plate, at least a metal plate, a circuit board, a plurality of light emitting devices and a heat conductor. The optical plate has a light incident surface and a light exit surface. The light exit surface faces the liquid crystal display panel. The metal plate and the circuit board are disposed near the light incident surface. The light emitting devices are disposed between the metal plate and the light incident surface. The heat conductor is disposed between the light emitting devices and the metal plate, for conducting heat generated by the light emitting devices to the metal plate.

Abstract: A backlight assembly includes a plurality of light emitting diodes (LEDs), a light guiding plate disposed on the same plane as the LEDs, and a plurality of optical correcting portions formed on a side of the light guiding plate and spaced apart from each other by a predetermined distance to change an optical path.

Abstract: A backlight assembly and a liquid crystal display (“LCD”) device having the same are provided. The backlight assembly includes a light guide plate including an incident surface formed at a lateral side of the light guide plate, a light emitting diode (“LED”) positioned below the light guide plate and a reflecting plate reflecting light emitted from the LED towards the incident surface.

Abstract: A surface light source device for illuminating a displaying member of a display comprises a light guide plate and primary light source. Primary light enters into a first guiding portion through an end face (incidence face) thereof extending in an extending direction, then inner-propagating and entering into any second guiding portion gradually meantime. A major part thereof is inner-reflected by an inner-reflection face (first side face) to be directed to a guiding-emitting-portion, then being outputted from an emission face gradually. The first side face makes a sharp angle ? with respect to the extending direction at a portion connected to the guiding-emitting-portion. Second guiding portion has a second side face which is located on a side nearer to the incidence face and makes a sharp angle greater than ? at a portion connected to the first guiding portion.

Abstract: An organic light-emitting display device includes a substrate, a first buffer layer and a second buffer layer on the substrate, a thin film transistor on the second buffer layer, an organic light-emitting diode electrically connected with the thin film transistor, and a photo sensor with an intrinsic region on the second buffer layer, wherein the photo sensor is capable of absorbing red light from the organic light-emitting diode and of exhibiting quantum efficiency of from about 50% to about 90%.

Abstract: A lighting system includes a light source, a light source substrate on which the light source is mounted, and a light guide plate having an end surface. Part of the end surface serves as a light entrance surface that faces the light source. The end surface of the light guide plate has a recession and the inner surface of the recession serves as the light entrance surface. The light source is arranged in the recession such that the light source is not in contact with the light entrance surface.

Abstract: A backlight module and a light diffusing module disposed therein are provided. The light diffusing module includes a diffuser plate and an optical structure layer. The diffuser plate has a light entrance surface and a light output surface. The light entrance surface is corresponding to a light emitting surface of a light source. The light output surface of the diffuser plate includes a prickleless surface. The diffuser plate has a transmittance between 50% and 65%. The optical structure layer is disposed on the diffuser plate and includes an upper surface and a lower surface. The upper surface includes a plurality of optical structures. The lower surface of the optical structure layer directly contacts the light output surface of the diffuser plate.

Abstract: A planar waveguide system includes a planar waveguide having a planar surface for emitting light, a back panel opposite the planar surface, and edge sides between the planar surface and the back panel. To reduce light energy losses during delivery of light from the light source to the planar surface, the system uses a transparent dielectric sleeve for holding a light source that is positioned adjacent to an edge side of the planar waveguide to enable light from the light source through the sleeve and incident into the planar waveguide.

Abstract: The present invention makes a radiation angle of light at a portion of a light guide plate in front of an LED formed on one edge of a light guide plate and a radiation angle of light at a corner portion of the light guide plate equal to each other as much as possible. A shape of beam control elements which are arranged on a lower surface of a light guide plate is arranged concentrically about the LED.

Abstract: A surface light source conversion member, which converts emission light from a light source to planar light, has a predetermined thickness at a part thereof where a light incidence surface of a light guide, which is opposed to the light source, is located. A reflector, which reflects emission light from the light source toward the light incidence surface, includes a clamp portion that clamps the surface light source conversion member in a thickness direction thereof. The clamp portion contacts a corner portion that is formed between a light emission surface of the light guide and the light incidence surface of the light guide and is separated from the light emission surface. The reflector creates a gap, which is smaller than a predetermined thickness, between the light source and the light incidence surface.

Abstract: A light guiding plate (120) includes a light incident surface (121), a light emitting surface (122) adjacent to the light incident surface, and a bottom surface (123) opposite to the light emitting surface. The light incident surface includes at least one row of first grooves (1211) and at least one row of second grooves (1212). The first grooves is configured for increasing a range of incident angles in which light beams enter the light guiding plate via the light incident surface and thereby improving a brightness of the light guiding plate, and the second grooves is configured for complementing the functions of the first grooves thereby improving a uniformity of light output by the light guiding plate.

Abstract: A backlight assembly includes a light supplying part and a light guide plate. The light supplying part includes a white light source and a monochromatic light source that generates a monochromatic light. The white light source generates a white light responsive to an electric power provided from exterior to the backlight assembly. The light guide plate is disposed adjacent to a side of the light supplying part. The light guide plate includes a light guiding region where the white light and the monochromatic light are guided into and a peripheral region that surrounds the light guiding region. Therefore, color reproducibility of an LCD apparatus is increased so that an image display quality of the LCD apparatus is improved.

Abstract: A backlight module arranged under a flat display includes a printed circuit board being parallel to the flat display and including a plurality of LEDs, a reflection portion being a reflection wall bent from a fringe of the LEDs to extend over the LEDs, and a guide light plate being parallel to the printed circuit board. The reflection portion includes an orientation wall parallel to the reflection wall and an outlet with a direction parallel to the printed circuit board. The guide light plate has an end connecting inside the outlet of the reflection portion, a light delivering surface adjacent to the flat display, and a reflection surface arranged at a bottom thereof.

Abstract: The present invention provides a surface light source device capable of reducing luminance non-uniformity near point light sources and near between the point light sources adjacent to each other, and a display device of high display quality. The surface light source device includes: a plurality of LEDs arranged at a predetermined spacing; a light guide plate that emits, as a surface light, light emitted from the point light sources and entered into at least one side surface, through a light emission surface perpendicular to a light incident surface; reflecting sheets disposed respectively on a light anti-emission surface and near the LEDs in the light guide plate; and a casing having an opening part at a location corresponding to the light emission surface of the light guide plate, and holding the LEDs and the light guide plate and the reflecting sheets.

Abstract: A lighting unit of the present invention includes a light guiding plate (3), a light source (2) disposed so as to face an end face of the light guiding plate, a reflector (4) disposed so as to surround the light source, a housing (6) disposed so as to have a light guiding plate-retaining portion (6a) that retains at least the reflector and is partially interposed between the light source and the end face of the light guiding plate so as to retain the light guiding plate, and a reflecting sheet (5) disposed on one of principal surfaces of the light guiding plate, the lighting unit being configured such that light from the light source enter into the end face of the light guiding plate and goes out from another principal surface of the light guiding plate. The reflecting sheet is disposed so that an edge portion (5a) is bent so as to be positioned between the light guiding plate-retaining portion of the housing and the end face of the light guiding plate.

Abstract: A light guide which guides light emitted from an LED includes a light incident end surface for receiving light, a light outputting surface for outputting a guided light, and a lens forming surface that has a plurality of elongated lenses arranged in parallel to each other and formed along the directivity of light incident from the LED, such that a plurality of micro regions are defined over the plurality of elongated lens. In the vicinity of the LED, a distribution of micro regions having an inclination angle between 20° and 50° is at least 10% over all micro regions. A light deflection element disposed adjacent to the light guide light outputting surface includes a light entrance surface having a plurality of lenses formed thereon that are parallel to each other and extend in a direction parallel to the light guide light incident end surface.

Abstract: Backlighting systems are disclosed, which include a lightguide with at least one light source optically connected to an edge of the lightguide for supplying light into its interior and a reflective cavity with at least one light source optically connected to the reflective cavity for supplying light into its interior. The reflective cavity may include a first reflector and a second reflector and at least one source may be disposed at an edge of the reflective cavity. Alternatively, the reflective cavity may include a back reflector portion and light sources may be disposed at the back reflector portion.

Abstract: The backlighting device (1) enables an information display element of a portable object such as a wristwatch to be illuminated from the back. This device comprises a light guide plate (7) having a front face and a rear face, a light reflector (6) located on the rear face of the light guide plate, a light diffuser film (9) and a rectifier film (11) located on the front face of the light guide plate and a source of visible light (2). This light source, such as a light emitting diode (2), feeds light beams to the edge of the light guide plate, which spread in the light guide plate between its two faces. A layer, such as a diffuser film, has a zone (10?) with opacity decreasing from a limit (25) located close to the boundary area of the light guide plate, which receives the light beams of the light source, in order to attenuate the intensity of the light crossing said zone.

Abstract: The backlighting device (1) enables an information display element of a portable object such as a wristwatch to be illuminated from the back. This device comprises a light guide plate (7) having a front face and a rear face, a light reflector (6) located on the rear face of the light guide plate, a light diffuser film (9) and a rectifier film (11) located on the front face of the light guide plate and a source of visible light (2). This light source, such as a light emitting diode (2), feeds light beams to the edge of the light guide plate, which spread in the light guide plate between its two faces. A layer, such as a diffuser film, has a zone (10?) with opacity decreasing from a limit (25) located close to the boundary area of the light guide plate, which receives the light beams of the light source, in order to attenuate the intensity of the light crossing said zone. This zone with decreasing opacity is, for example, a shading white or black dye disposed on the diffuser film.

Abstract: A backlight unit is provided including a light guide panel (LGP), a point light source emitting light at an edge of the LGP; and a refraction member being positioned between the point light source and the LGP and refracting the light emitted from the point light source toward the optical axis of the point light source in order to reduce the azimuth angle of the light that is incident upon the LGP. The refraction member includes a prism array in which a V-shaped prism pattern is repeatedly arrayed, the apex of the prism pattern facing the edge of the LGP, and a transparent portion that prevents the light from being totally reflected by the prism pattern in a region along an optical axis of the light source.

Abstract: A backlight module has a light guide plate having a transparent plate and a light-mixing structure. The light-mixing structure contains a light-convergence body and a light-dispersing body connected with each other to form an hourglass-shaped structure. With the light-mixing structure, the light guide plate can mix light beams of different colors to produce white light beams.

Abstract: A light-conductive board and a rear light module using the light-conductive board is disclosed. The light-conductive plate having a light-emitting face, a light-reflecting face, and at least a light-entering face and the light-reflecting plate adhered onto the external of the light-reflecting face of the light-conductive board, an optical film including a divergent lens and a convergent lens mounted onto the external of light-emitting face of the light-conductive board, a lamp reflector which encloses a lamp source, and the light-entering face of the light-conductive board corresponding to the circumferential edge of the light-entering recessed region of the lamp source adjacent to the light-emitting face or one of the face of the reflection face at least forms into a protruded section.

Abstract: A backlight module including an independent light source is provided. The backlight module includes a light generation device, a light transmission device, a light mixing device and a planar light generation device. The light generation device may include one or more light emitting components. The light transmission device may be adopted for receiving and transmitting the light emitted by the light generation device. The light mixing device may be adopted for mixing the light emitted by the light transmission device to generate a mixed linear light. The planar light generation device may comprise a light distributing portion for receiving the mixed linear light to generate a planar light.

Abstract: A light integrating system includes at least one total internal reflection (TIR) prism and a light integrating device disposed to collect and homogenize light exiting from the TIR prism.

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: A backlight assembly for an LCD apparatus comprises a lamp emitting light; a light guide plate including a light-entering surface through which the light from the lamp enters, and a light-emitting surface through which the light is emitted; a lamp reflector having an opening toward the light-entering surface and combined to the light guide plate, accommodating and covering the lamp; and a light interceptive part interposed between the light-emitting surface and the lamp reflector, and preventing the light from the lamp from entering through an edge at which the light-entering surface and the light-emitting surface are intersected. With this configuration, the present invention provides a backlight assembly for an LCD apparatus, which is improved in preventing a bright-line occurring on a front area adjacent to a light-entering surface of a light guide plate and in enhancing the brightness.

Abstract: The present invention relates to a lens-arrayed backlight module, consisting of a housing, a plurality of lamps, and a plurality of lens plates. The lamps are disposed in parallel between the housing and the lens plates to provide illuminating rays. The lens plates correspond to the lamps respectively, each of which being mounted at the center axis of the corresponding lens plate so that the illuminating rays provided by the lamps diffuse through the lens plates. The present invention also provides a liquid crystal display device using the lens-arrayed backlight module.

Abstract: A backlight apparatus includes a plurality of support members that maintain a diffuser plate in a fixed and level position with respect to the lamps and the housing that contains the lamps, to produce uniform illumination. The support members extend from the diffuser plate disposed at an open face of the housing, to the opposed back part of the housing, and include male-female interlocking parts to provide support. The support members include a set of cooperating portions, an upper and lower portion. The upper and lower portions may combine to provide a cavity in the support member. A cold cathode fluorescent lamp may extend through the cavity and the upper and lower portions may be secured to the diffuser plate and housing, respectively, by extending through openings formed in the diffuser plate or housing.

Abstract: A light-guide plate (1) arranged at a display face (2a) of a liquid crystal (2) and illuminates radiating light from a light source (3) to the display face (2a) is constructed by a light permeability base portion (10) having a first face (8), a second face (9) of the rear face side of the first face (8), and a third face (5) guiding light from the light source (3) from side face, an adhesive layer (11), and light permeability sheet (12) forming plural prism grooves on a light emission face (6) with the predetermined interval and providing on the adhesive layer (11).

Abstract: A surface light source device of side light type has a guide plate, a primary light source for supplying illuminating light through an incidence surface, first and second edges at which major surfaces respectively intersect the incidence surface, and one or plural additive members arranged in direct contact with the emission surface and/or the back surface thereon in the vicinity of the first edge and/or the second edge. At least one of the additive members has a shield for preventing illuminating light from being incident to the first or second edge. For example, the shield includes absorptive areas formed on the additive members. Each of the absorptive areas is formed so that each of the absorptive areas crosses the first or second edge. A distal end of a reflector arranged in the primary light source or frame blocks incidence of light to the first and/or second edge. The light incidence block to each edge prevents luminance irregularities in the form of a bright line.

Abstract: A light-inverse type guidelight plate adopted for a backlight module having at least one lighting member includes a reflection portion, a reflecting member partially covering the reflection portion, and a light-guiding portion connecting the reflection portion for providing a displaying region. Wherein the light-guiding portion locates behind the lighting member's back, which faces the reflecting member and dispose in a slot of the reflection portion. The light-guiding portion is shaped variously to meet requirements. The reflection portion has a reflection face, which reflects light emitted from the lighting member to the light-guiding portion to get a high uniformity thereof.

Abstract: A light integrating system includes at least one total internal reflection (TIR) prism and a light integrating device disposed to collect and homogenize light exiting from the TIR prism.

Abstract: A backlight system (100) in accordance with the present invention includes a plurality of light sources (110) for emitting light beams and a light guide plate (120) for receiving the light beams emitted by the light sources. The light guide plate includes a light input surface (121) and a light output surface (122) joining the light input surface. The light input surface has a plurality of protrusions (124) thereon. The light beams are refracted and diffused by the protrusions, and are then transmitted through the light guide plate to be emitted with a high degree of uniformity through the light output surface.

Abstract: The double-sided edge lighting-type display sign of the present invention comprises at least two illuminating light sources: two or one display signages; and a light-directing panel. Preferably, a display sign housing accommodates and supports the other elements of the present invention. Namely, the light box housing supports at least two light sources, the display signages and the light-directing panel. The light-directing panel of the present invention is at least partially light reflective and at least partially light passing. The light directing panel directs and redirects light from the included at least two edge lighting-type light source to the included display signages. The light ultimately incident on the display signages is greater than it would normally be without the light-directing panel.

Abstract: A light source module, applicable in a projection display system, comprises a light source, a light-selection device and a reflective device. The light source provides an incident beam. The light-selection device is arranged on a light path of the incident beam, for passing one part of the incident beam through and reflecting the other parts to be a reflective beam. The reflective device is arranged between the light source and the light-selection device, for reflecting the reflective beam back to and passing through the light-selection device.