Abstract: A backlight module of the present invention includes a light source unit and a light guide plate. The light guide plate has a light incident surface, and the light emitting unit is disposed corresponding to the light incident surface to provide a light incident on the light guide plate. The light marches in the light guide plate and provides a uniform lighting effect. A plurality of microstructures is disposed on the light incident surface, and each of the microstructure has a microstructure depth. The light guide plate has a plate thickness. The ratio of the microstructure depth to the plate thickness is substantially between 0.003 and 0.0625.

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

Abstract: 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 structure comprises a light-guide plate and a light source module. There is a light-entering surface, which is a burnished surface, on one side of the light-guide plate. Besides, there is an effective light-emitting area on the light source module, and there is a distance between the centerline of which area and that of the light-entering surface. Thereby, the luminance on the bottom-left corner of the backlight structure is made identical to the luminance on the bottom-right corner by increasing the propagation ranges of the light on the bottom-left and the bottom-right corners as a result of a burnish surface as well as of asymmetrically adapting the light source module.

Abstract: There is provided a back light unit having a light guide buffer plate. The back light unit having a light guide buffer plate includes a light source for generating the light when a power source is applied; a light guide panel whose light-receiving vertical surface that the light emitted from the light source enters is provided with a first prism pattern and whose bottom surface is provided with a refraction pattern, thereby converting the incident light from the light-receiving vertical surface into a surface light source; a reflection unit disposed in a bottom surface of the light guide panel to reflect light toward the light guide panel; and a buffer disposed between the light source and the light guide panel and whose light-emitting vertical surface corresponding to the light-receiving vertical surface of the light guide panel is provided with a second prism pattern.

Abstract: A light guide device is used in a back light module that more uniformly mixes different colored light emitted from a plurality of LEDs and transfers the mixed light to a display panel, wherein a light loss can be minimized during the light mixing process and the light can be more uniformly mixed. A light guide device is disclosed for mixing different colored light emitted from a plurality of light emitting diodes (LEDs) and guiding the mixed light to a display panel, wherein the light guide device comprises a light guide portion in the form of a plate arranged at a rear of the display panel; and a light mixing portion formed integrally with the light guide portion and including a light incidence surface adjacent to the plurality of LEDs and a light mixing area for mixing the light with difference colors incident through the light incidence surface.

Abstract: A light guide plate includes a light incident surface, a light emission surface intersects with the light incident surface, and a bottom surface opposite to the light emission surface. The light incident surface includes at least a first light receiving region and at least a second light receiving region. The first light receiving region has a distinctly different structure in comparison to the second light receiving region. One end of the first light receiving region communicates with the light emission surface, and the other end of the light receiving region communicates with the bottom surface. One end of the second light receiving region communicates with the light emission surface and, the other end of light receiving region communicates with the light emission surface.

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

Abstract: A 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: A backlight module has a light guide plate and a light source. The light guide plate contains a top plane, a bottom plane opposite to the top plane, a light entrance plane positioned between the top plane and the bottom plane, and a widened edge plane opposite to the light entrance plane. The widened edge plane is slanted relative to the light entrance plane.

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: A light emitting device adapted for a backlight module of a liquid crystal display is disclosed. The light emitting device comprises a plurality of light emitting units and a light guiding plate having a central portion and at least one side portion. Each of the light emitting units has a luminous surface and the light guiding plate has a plurality of light incident structures. Each of the light incident structures has a light incident surface opposite to the corresponding luminous surface, and a reflective surface forming an included angle with the light incident surface. Light emitted from each of the light emitting units passes through the light incident surface, is totally reflected by the reflective surface and enters into the central portion of the light guiding plate. The mixed reflective light run into the central portion of the light guiding plate and deflects outward to a user's side.

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: Structure for polarized light source suitable for the application of flat panel display is provided.

Abstract: In a method of forming a thin light guide plate which includes a compression step in an injection molding step, an optical pattern is liable to be adhered to a mold. Further, in removing the light guide plate from the mold using an ejector pin, a stress is concentrated on a local area of the light guide plate thus generating warping, deformation or irregularities in size of the light guide plate. To overcome such drawbacks, a liquid crystal display device is configured such that an optical pattern portion is compressed, and the light guide plate is removed by making use of a peripheral portion of a mold thus preventing the generation of stress in a local area of the light guide plate due to an ejector pin.

Abstract: Thinning of a planar illumination device using an LED is accelerated while higher and more uniform brightness is promoted. An LED 24 constituting the planar illumination device has no lamp house, but a translucent resin that seals an LED chip 25 is exposed. An outline of the translucent resin is formed as a projecting portion 28 comprising a continuous curved surface. Moreover, on a side end face 12a opposed to the LED 24 of a light guide plate 12, a notch portion 12d following the outline of the projecting portion 28 is formed, and on this notch portion 12d, a prism row 101 made of a plurality of unit prisms extending in a direction crossing the light guide plate 12 is formed.

Abstract: A display device includes a light guide plate which includes a light transmission portion and an antireflection portion at two opposite end faces and which is provided with a light extraction portion in part of a surface, respective light sources which are arranged on outer sides of the two opposite end faces, a transmission liquid crystal panel located adjacent to the light extraction portion, and a synchronous drive unit that alternately turns ON the light sources and that displays an image that is synchronous with an alternating turn-ON operation of the transmission liquid crystal panel.

Abstract: A planar illumination device includes a laser light source; a light guide plate for guiding light entered through an end surface to be outputted from a first principal surface; an optical element which forms diffusing light outputted from the laser light source into a substantially parallel light in a thickness-wise direction of the light guide plate and which outputs the resulting parallel light to the end surface of the light guide plate; and a first light deflecting unit for deflecting a propagation direction in the light guide plate of the light incident thereon, wherein the first light deflecting unit is arranged such that a degree of deflection of the light incident on the light guide plate differs according to positions in the light guide plate, to make an amount of light outputted from the first principal surface uniform in the first principal surface.

Abstract: A back-light module includes a light-guiding plate and a light source. The light-guiding plate has a lateral inlet surface. The light source is arranged at one side of the lateral inlet surface. The light source has a plurality of light-emitting diodes which are disposed in a line and at interval. A gap is formed between the adjacent light-emitting diodes. The lateral inlet surface dispose a plurality of convex lenses, each of the convex lenses has a convex surface facing to the corresponding gap between the adjacent light-emitting diodes.

Abstract: A light emitting panel, film or substrate assembly includes an optically conductive panel, film or substrate having at least one light input surface defined by at least one edge of a slot, cavity, opening or hole in which at least one LED light source having a greater width than height is positioned adjacent to the light input surface for directing light into the panel, film or substrate. The LED light source is configured to generate light having an output distribution defined by a greater width component than height component, the height component substantially corresponding to or less than the thickness of the light input surface.

Abstract: A method for patterning a light guide plate includes: (a) using laser beams to carve out a plurality of notches on a mold; and (b) manufacturing the light guide plate with the mold for forming a plurality of laser process patterns on an incident plane of the light guide plate.

Abstract: To prevent, in a backlight where light emitting diodes are arranged on a side surface of a light guide plate, light leakage from a reflection sheet and reduce non-uniformity of emission light from the backlight. In a liquid crystal display device that includes a backlight that irradiates a liquid crystal panel with light, LEDs are disposed as light emitting elements on a light guide plate that is disposed in the backlight, a reflection sheet that comprises a multilayer film is disposed on a bottom surface of the light guide plate, projections are disposed by sandblasting on the bottom surface of the light guide plate in the vicinity of the LEDs, and tight adhesion between the reflection sheet and the light guide plate is prevented. In the vicinity of the LEDs, in order to counter light non-uniformity, reflecting grooves are not disposed and it is a mirror surface, but tight adhesion can be prevented by disposing the projections.

Abstract: A direct type backlight module includes a light guide plate, a plurality of supporting units and a plurality of light sources. The light guide plate includes a bottom surface, and an emitting surface opposite to the bottom surface, a plurality of grooves formed on the bottom surface. The light sources are fixed in the grooves with the corresponding supporting units. The present backlight module has a thin body and also has a high optical brightness.

Abstract: A planar light source of the present invention includes a light source part, a light guide part for guiding light emitted from the light source part to form planar emission of the light, and a reflector for reflecting light emitted from the light source part to allow the light to enter the light guide part. The reflector has a member for controlling the amount of reflected light capable of controlling the amount of reflected light.

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: 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 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 projection system comprises a light source module and a light-guiding assembly. The light source module comprises a reflecting cover and a light source disposed in the reflecting cover to form a first beam with a first f-number. The light-guiding assembly comprises a body with an incident end and a lens disposed on the incident end. The first beam passes through the lens disposed on the incident end to form a second beam with a second f-number. The second f-number of the second beam is different from the first f-number of the first beam.

Abstract: A light emitting device includes a light source and a light guide body having a light guiding surface from which light emitted from the light source is received and having a light emitting surface from which the received light is emitted. A plurality of rows of light source arrays each formed by a plurality of the light sources are provided on the light guiding surface.

Abstract: A light guide unit for a point light source includes a light incident portion, a first reflecting portion and a second reflecting portion. The light emitted from the point light source enters to the light incident portion. The light incident portion includes an optical pattern diffusing an incident light corresponding to the point light source. The first reflecting portion reflects a first light of the incident light. The second reflecting portion roundly connects the first reflecting portion to the light incident portion and reflects a second light of the incident light.

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 multi-functional LED lamp is mainly composed of a lamp base, an illuminant device, a light guide device and a lampshade. The illuminant device is provided with plural LED bulbs planted on a laminate that is fixed on the lamp base with a heat-conductive medium spread in between. Heat generated by the illuminant device is dispersed by the lamp base. The light guide device is transparent, placed at a place where the illuminant device is to emit, used to conduct the light beams and promote its brightness. The lampshade is covered on the light guide device and the illuminant device. With features of low energy consumption, long service life and high luminous efficiency for LEDs and a good cooling member, the LED lamp is really energy saving and high-efficient.

Abstract: A back light assembly includes a light guide plate (LGP), a light reflecting member (LRM), at least two lamps, and a receiving container. The LGP includes a light incidence face having a width that is a first distance, a light reflecting face for reflecting a first light, and a light exiting face for emitting the reflected first light as a second light. The LRM covers the light incidence face to form a receiving space defined by the LRM and the light incidence face. The at least two lamps are disposed in the receiving space and spaced apart from each other by a second distance. A sum of diameters of the two lamps and the second distance is longer than the first distance. The receiving container receives the LGP and the LRM, where the LRM includes a chamfer disposed at an edge, the chamfer enhancing a reflection efficiency.

Abstract: Disclosed herein is a backlight unit, capable of easily forming a curved or three-dimensional shape. The backlight unit according to the present invention comprises a light guide panel which includes a light guide plate having on one surface or both surfaces thereof a plurality of notches, an uneven dot pattern, a printed dot pattern or a sanded surface, or a light diffusion plate; a luminous means which includes a lamp mounted on a PCB to emit light to the light guide panel; a groove formed along an edge of the light guide panel so that the luminous means is installed in the light guide panel; and a thin heat radiating plate fixed on a back surface of the PCB along the groove.

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 backlight module includes a light source assembly and a light guide plate. The light guide plate includes a side surface, a light emission surface substantially perpendicular to the side surface, and a first groove defined at the side surface. The first groove fixedly accommodates the light source assembly.

Abstract: An illumination device includes a light guide plate having an incident end face and a reflecting surface, and a plurality of light sources provided at the incident end face of the light guide plate. The reflecting surface of the light guide plate has a diffusing pattern for diffusing incident light, the diffusing pattern has a plurality of ridgelines arranged perpendicularly to a propagating direction of the incident light to diffuse the incident light, and the ridgelines are discontinuous in the propagating direction.

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 has a light guide plate and a light source. The light guide plate contains a top plane, a bottom plane opposite to the top plane, a light entrance plane positioned between the top plane and the bottom plane, and a widened edge plane opposite to the light entrance plane. The widened edge plane is slanted relative to the light entrance plane.

Abstract: Primary light from primary light source (LED) is supplied toward a light an input face of an light control member. The light input face is provided with a plurality of projections for light input promotion. Each projection is composed of a generally spherical top portion and tapered column-like portion. Height of each projection may greater than a distance as far as an adjacent projection. An light output face of the light control member may be provided with of a plurality of projections having a function of causing an inner incident light to be deflected as to approach a frontal direction on being emitted, or may be formed of a roughened surface. A light flux control member may be interposed between the primary light source and the light control member.

Abstract: A light-emitting device and an electronic device using the same are provided. The light-emitting device includes a light-guiding plate, a circuit board, at lease one light source unit and a reflective layer. The circuit board is disposed under the light-guiding plate. The reflective layer is disposed above the light-guiding plate. The light-guiding plate has at lease one hole. The light source unit is disposed on the circuit board and within the hole. The reflective layer is disposed above the hole. The light-emitting device is disposed on one side of a part, such as a keypad, of the electronic device for providing light to the keypad.

Abstract: A backlight module (2) includes a light source (21) and a light guide plate (23). The light source includes a lamp (231) and two electrode cases (233), the two electrode cases engage with opposite ends of the lamp. The light guide plate includes a light output surface (212), a bottom surface (213), two adjacent light incident surfaces (211), two side surfaces (214), and two holding devices (215). The two holding devices are respectively provided at diagonally opposite corners of the light guide plate, where the light incident surfaces are respectively adjacent the side surfaces, and the holding devices are for retaining electrode cases. The light source is disposed adjacent to the light incident surfaces. The lamp are not liable to shock, so the lamp can not be damaged. Further, the backlight module eliminates the need for rubber rings. Thereby reducing the cost of the backlight module.

Abstract: A light guide (20) for illuminating keys of a keyboard or keypad of a portable electronic device, includes an array of apertures (22) and a groove (21) at one end of the light guide. The apertures are configured to illuminate the keys via a light source (10). The light source is disposed adjacent to the groove. A peripheral wall around each aperture is configured partially as a reflecting surface, and partially as a transmitting surface. The reflecting angle of the reflecting surface is larger than a critical total internal reflection angle so as to transfer the light farther. The light guide has a desired uniform light by means of a light source. This provides the portable electronic device consuming little power.

Abstract: A light-guiding system comprising a plate-like light-emitting element (20) provided with means for emitting light through at least part of its front surface (22). Light is coupled in by a plate-like light-guiding member (21) connected to a lateral side of said lightemitting element (20). One or more interstices (25) are present between said light-emitting element (20) and said light-guiding member (21).

Abstract: An exemplary backlight module (1) includes a light guide plate (10) and at least one point illuminator (12). The light guide plate includes a first side surface (102), and a protrusion (14) outwardly extending from the first side surface. The protrusion includes at least one second side surface (144) oblique to the first side surface. The at least one point illuminator is adjacent to the least one second side surface.

Abstract: A backlight module includes a base, a plurality of point light sources distributed on the base and a light guide plate. Each of the point light sources includes a transparent cover and a light-emitting unit received in the cover. The transparent cover includes an inwardly curved light emitting top surface for emitting light from the light-emitting unit. The light guide plate includes an incidence surface disposed facing the point light sources, and an emission surface opposite to the incidence surface. The incidence surface includes a plurality of light diffusion areas spatially corresponding to the respective point 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: A planar light source system having an LED (1) serving as a primary light source of substantially point-shaped light source, a light guide (2) having a light incident face on which light emitted from the LED (1) is incident and a light emission face (4) from which light guided through the light guide (2) is emitted, a light deflecting device (3) for controlling the direction of the emission light from the light guide (2), and a reflection sheet (6). LED (1) is disposed at a corner portion of the light guide (2), and many elongated prisms (5) are arranged substantially arcuately in parallel to each other on the light incident surface (14) of the light deflecting device (3) so as to surround LED (1).