Abstract: An optical unit is provided with an integral light condensing section and a light transmitting section. The light condensing section is in a shape of a parabolic body of rotation substantially widening from a proximal end toward a distal end with a concave section opening at a proximal end face to accommodate a light emitting element, a side circumferential face to reflect the light from the light emitting element inward and a distal end face to introduce the light from the light emitting element into the light transmitting section. The light transmitting section is a substantially cylindrical shape of a smaller diameter than the light condensing section, and comprises a proximal end face to introduce the light from the light condensing section, a side circumferential face to reflect the light introduced from the proximal end face inward and a distal end face to emit the light.

Abstract: A reflector (14) for a luminaire comprises a generally parabolic wall (28) having series of main right-angled prisms (16) and an interleaved series of transition prisms (18). The main and transition prisms have essentially the same shapes and follow the same overall curvature to control the illumination. The transition prisms transition into the main prisms by merging a peak of a transition prism into the valley between adjacent main prisms in a short transition zone (20). Thus, the transition zone has only a small effect on the overall lighting pattern.

Abstract: A lens for a LED light source includes a first light emitting surface and a light incident surface perpendicular to the optical axis of the lens. The first light emitting surface is a convex surface and opposite to the light incident surface. The lens further includes a second light emitting surface opposite to the light incident surface and adjacent to the first light emitting surface. The thickness between the second light emitting surface and the light incident surface near the optical axis exceeds the thickness between the second light emitting surface and the light incident surface away from the optical axis.

Abstract: A vehicle lighting system having: a light guiding member having a front face as a light emitting surface, a rear face having a plurality of reflecting portions inclined to the front face, and a side face; and a light source disposed opposite to the side face. An angle ? defined between the front face and the side face is designed such that, of external lights to enter into the light guiding member, a light to travel directly to the side face can be totally reflected on an interface of the side face.

Abstract: A brightness enhancement film (BEF) includes a light transmissive substrate having a first surface and a second surface, a plurality of lenses disposed on the first surface, and a reflective layer. Each of the lenses has a curved protruding surface facing away from the light transmissive substrate. The radius of curvature of the curved protruding surface in a first direction parallel to the first surface is R1, the radius in a second direction is R2, and R1?R2. The reflective layer is disposed on the second surface and has a plurality of light pass openings respectively located on the optical axes of the lenses. The distance between the apex of the curved protruding surface and the corresponding light pass opening is L, the refractive index of the lenses is n, and the BEF satisfies L<nR1/(n?1) and L<nR2/(n?1). A backing light module using the BEF is provided.

Abstract: A lens for distribution of light predominantly toward a preferential side from a light emitter having an emitter axis and defining an emitter plane. The lens has an emitter-adjacent base end forming an emitter-receiving opening to an emitter-surrounding cavity defined by an inner surface which includes a front sector centered on the preferential side and a back sector centered on the non-preferential side radially opposite the preferential side. The front and back sectors differ in their respective configurations for refracting light from the emitter. The lens further includes an primary back surface positioned to receive light from at least a portion of the inner-surface back sector and configured for total internal reflection (TIR) thereof. The inner-surface back sector and the primary back surface extend along substantially elliptical cross-sections in planes substantially parallel to the emitter plane.

Abstract: The present invention discloses a coupling lens system, which comprises a collimation lens for collimating light from light source to a first direction; a first lens surface for total internal reflecting light from light source to the first direction; and a second lens surface for total internal reflecting light from the first direction to a second direction. Wherein an angle between the first direction and the second direction can be larger than, smaller than or equal to 90 degrees, and preferably between 70 to 100 degrees. Additionally, the system further comprises at least one extra surface parallel to the second lens surface, wherein at least one extra surface has a length L and is parallel to each other. At the same time, each surface and another surface has a distance D in between, and the length L can be equaled to or larger than the distance D according to purposes and further modifies a shape of the coupling lens system.

Abstract: An adapter (1) with at least one electronic component (2) for mounting in a hole (3) extending through or partly through a composite board (4), which includes at least two layers (5) of electrically conducting material that are separated by at least one insulator (6) of electrically insulating material, the adapter (1) including one or more legs (7) adapted for by mounting in the hole (2) to establish electric connection with a first layer (8), and where the at least one component (2) is fitted on a metal item (9) which has a contact surface, and that the contact surface is in electrically and thermally conducting connecting with a contact surface on a second layer (10) when the adapter (1) is mounted in the hole (3).

Abstract: Provided are an illumination device and a lens employed in the device for controlling light travelling direction, the device being capable of illuminating brightly and uniformly a certain limited region (region-to-be-illuminated) corresponding to an object such as subject for photography. The illumination device emits light H coming from a light emitting element (point-like light source) employing a LED as a light emitting source via the lens. A light control emission face of the lens emits light (rays), which is included in light H introduced into the lens through an incidence face thereof and travelling within the lens to the light control emission face without undergoing inner-reflection at any surface of the light control emission face, as illumination light.

Abstract: The present invention provides an optical device configured for the creation of an asymmetric illumination beam pattern while additionally mixing the light created by two or more light-emitting elements. The optical device comprises a reflector body which extends between an entrance aperture and an exit aperture, wherein the two or more light emitting elements are positioned relative to the entrance aperture and light is reflected within the reflector body exiting at the exit aperture. The reflector body includes a first pair of walls including symmetric reflective elements and a second pair of walls orthogonal to the first pair of walls, wherein the second pair of walls includes asymmetric reflective elements. The first pair of walls provides a means for mixing the light generated by the two of more light-emitting elements and generating a symmetric beam pattern about a first axis.

Abstract: The present invention relates to an optical transformation device, and more particularly to an optical transformation device able to transform a projected light beam from a spot light source to form rectangular projection surfaces, which primarily includes a refracting body composed of an emergent surface structured from a combination of a plurality of optical surfaces and an incident surface configured as a concave spherical surface. Two reflecting surfaces located at two sides of the meridian of the emergent surface enable the luminous flux of incoming light to completely impinge upon the refracting body, and the interactive effect from the combined optical surfaces transforms the light shape of a light beam from a spot light source, and is projected to produce an almost rectangular shaped illumination projection surface.

Abstract: A vehicle-purpose lighting tool is featured by comprising: a light-conducting member having a front light-emitting plane, a rear plane having a concave/convex shape, and a side edge plane; and a light source arranged at a position opposite to the side edge plane; in which within external light which is entered via the front light-emitting plane into the light-conducting member, a portion of the external light which is directly traveled to the side edge plane is totally reflected on a boundary plane of the side edge plane portion; a plurality of reflecting portions are formed on the rear plane and are coupled to each other via a coupling portion in such a direction that the reflecting portions are separated apart from the side edge plane side; and distances between the plurality of reflecting portions and the front light-emitting plane are changed in a discontinuous manner along the separating direction.

Abstract: A light-emitting device and a method for fabricating the same are provided. The light-emitting device includes: a substrate; a light-emitting component disposed on the substrate; a lens covering the substrate to hermetically seal the light-emitting component; and a reflective layer formed and a light emission surface defined on the surface of the lens such that light beams generated by the light-emitting component are reflected off the reflective layer, refracted by the light emission surface, and then emitted outward in a specific direction, thereby forming specific light distribution patterns on an illuminated surface outside the light-emitting device.

Abstract: A light emitting diode (10) includes an LED chip (14) and an encapsulant (16) enclosing the LED chip. The LED chip has a light emitting surface (141), and the encapsulant has a light output surface (161) over the light emitting surface. The light output surface defines a plurality of annular, concentric grooves (163). Each groove is cooperatively enclosed by a first groove wall (165) and a second groove wall (166). The first groove wall is a portion of a circumferential side surface of a cone, and a conical tip of the cone is located on the light emitting surface of the LED chip.

Abstract: In one aspect, a light-mixing optic is disclosed for use with one or more light sources such as light emitting diodes. In one embodiment, an exemplary optic can include an optical body disposed about an optical axis and having an input and an output surface and a peripheral surface extending between the two. The input surface can form a central cavity for receiving light from the light sources, if not the light sources themselves. Further, the input surface can be shaped to refract substantially all of the light received from the one or more light sources away from the optical axis to the peripheral surface of the optic, where that light (e.g., substantially all of it) can be redirected (e.g., via total internal reflection or specular reflection) to the output surface. An array of micro-lenses or other surface features can be formed on the output surface. Further embodiments, as well as exemplary design methods, are also disclosed.

Abstract: A light exit surface of an illuminating lens has a first light exit surface and a second light exit surface. The first light exit surface is recessed toward a point on the optical axis, and the second light exit surface extends outwardly from the periphery of the first light exit surface. The first light exit surface has a transmissive region and a total reflection region. When the position of a light source on the optical axis is defined as a starting point, the transmissive region transmits light that has been emitted from the starting point at a relatively small angle with respect to the optical axis, and the total reflection region totally reflects light that has been emitted from the starting point at a relatively large angle with respect to the optical axis.

Abstract: An illuminating lens includes a light entrance surface, a light exit surface, and a reversing surface. The light exit surface has a first light exit surface and a second light exit surface. The first light exit surface is recessed toward a point on the optical axis, and the second light exit surface extends outwardly from the periphery of the first light exit surface. The first light exit surface includes a transmissive region in the center thereof and a total reflection region on the peripheral side thereof. The reversing surface has a shape such that the light that has been emitted from the light source, totally reflected repeatedly at the light exit surface, and then reached the reversing surface is guided to the first light exit surface by total reflection.

Abstract: An illuminating lens includes a main body and a ring portion. The main body has a light exit surface, and the light exit surface has a first light exit surface recessed toward a point on the optical axis and a second light exit surface extending outwardly from the periphery of the first light exit surface. The first light exit surface has a transmissive region in the center thereof, and a total reflection region on the peripheral side thereof. The ring portion has a back surface configured to guide the light that has been emitted from a light source, totally reflected repeatedly at the light exit surface, and then entered the ring portion to an end surface by total reflection.

Abstract: A light emitting device having a simple structure and high decorating characteristics is provided. The light emitting device comprises an emission source for outputting lights having different colors from different emission parts; and a transmitting resin having a conically shaped reflection surface for reflecting lights output from each of the emission parts, and covering the light emitting source, wherein the emission source is provided so that one or more of the emission parts are located away from a central axis of the conical shape.

Abstract: Apparatus for illuminating a feature on a transparent light transmitting substrate or window: the substrate is capable of trapping light within itself and propagating the light along the substrate with total internal reflection. A light source is connected by an optical arrangement positioned with respect to one of the surfaces of the substrate for directing light into the substrate at an incident angle selected for propagation of light along the substrate. An extraction feature at a location on the surface of the substrate is configured to illuminate internal reflection at the feature, so that the feature becomes illuminated. Arrangements for the shape, orientation and adjustment of the optic, for configurations of the feature, for coupling the optic and also for coupling the feature to the substrate and particularly its surface are disclosed.

Abstract: An illuminating lens has a light entrance surface and a light exit surface. The light exit surface has a first light exit surface recessed toward a point on an optical axis A and a second light exit surface extending outwardly from the periphery of the first light exit surface. The first light exit surface includes a transmissive region located in the center of the first light exit surface and a total reflection region located around the transmissive region. The transmissive region transmits light that has been emitted from a starting point Q, which is the position of a light source on the optical axis A, at a relatively small angle with respect to the optical axis A. The total reflection region totally reflects light that has been emitted from the starting point Q at a relatively large angle with respect to the optical axis A.

Abstract: A light exit surface of an illuminating lens has a first light exit surface and a second light exit surface. The first light exit surface is recessed toward a point on the optical axis, and the second light exit surface extends outwardly from the periphery of the first light exit surface. The first light exit surface has a transmissive region and a total reflection region. When the position of a light source on the optical axis is defined as a starting point, the transmissive region transmits light that has been emitted from the starting point at a relatively small angle with respect to the optical axis, and the total reflection region totally reflects light that has been emitted from the starting point at a relatively large angle with respect to the optical axis. A reflective layer is formed on a bottom surface that surrounds a light entrance surface and faces oppositely to the light exit surface.

Abstract: The invention concerns a device for projecting a linear optical marking onto at least one boundary of a room, such as floor surface for example, comprising a light source (12) that emits laser radiation along an optical axis (16) as well as a cuboid lens (14) connected in series with the light source, penetrated by the optical axis and reflecting as well as refracting the radiation. To facilitate fanning and reflecting of light originating from the light source through constructively simple means, the invention proposes that provided in the frontal surface (20) is a channel-shaped depression (40) and provided in the rear surface (22) is a projection (24), both of which are geometrically designed and arranged so that the radiation can be totally reflected and that totally reflected radiation striking the depression can be fanned out, where the optical marking runs to both transverse surfaces of the lens.

Abstract: An optical element is disclosed, for receiving relatively narrow light from a planar light-emitting diode (LED) source, and for redistributing the light into a relatively wide range of output angles that span a full 360 degrees. The element may be used to retrofit existing fixtures that were originally designed for incandescent bulbs with LED-based light sources that have similar emission profiles. The element is small enough so that it may be packaged along with an LED module and its control electronics in the volume envelope of an incandescent light bulb. An exemplary element is a single, transparent, rotationally-symmetric lens that has a batwing shape in cross-section, extending angularly away from a longitudinal axis. The lens also includes a variety of curved, straight, specular and optionally diffuse portions on its longitudinal and transverse faces, all of which cause a variety of internal and external reflections, refractions, and optionally scattering.

Abstract: A light control sheet, used in a surface light source device having a light source to control a travel direction of light emitted from the light source, including: a base layer; a lens layer having unit lenses arranged on the light outgoing side of the base layer; a light selection layer disposed on the light incident side of the base layer and a light selection layer disposed on the light incident side of the base layer and having light transmission parts transmitting the light therethrough and the light reflection parts reflecting the light; and a support layer disposed on the light incident side of the light selection layer. Each light transmission part is disposed in a region including a position opposite to an apex of each corresponding unit lens in a normal direction to the sheet surface. The light reflection parts are respectively arranged alternately to the transmission parts.

Abstract: A mounting surface for mounting a plurality of LEDs has a plurality of orientable lenses each individually affixed about a single LED. Each orientable lens has a primary reflector and a refracting lens that direct light emitted from a single LED to a reflective surface of the orientable lens that reflects the light off a primary LED light output axis.

Abstract: A spread illuminating apparatus includes an LED, a transparent resin plate and a light reflecting sheet, wherein the transparent resin plate includes slits adapted to have inserted therein flap portions of the light reflecting sheet, and wherein an adhesive tape with flexibility is placed along at least one flap portion of the light reflecting sheet so as to cover at least one slit of the transparent resin plate, whereby the light reflecting sheet is prevented from warping or undulating in spite of difference in thermal expansion coefficient between the materials of the transparent resin plate and the light reflecting sheet, and also whereby light emitted from the LED and traveling in the transparent resin plate is totally reflected by the flap portions and therefore prevented from leaking from the outer side surfaces of the transparent resin plate.

Abstract: A light modifier for an LED producing light about a central axis is provided. The light modifier includes a lens defining an indentation. The indentation is angled relative to the central axis by an amount less than a complementary angle of a critical angle of the lens along the indentation. The lens can reduce the appearance of a bright spot created by the LED.

Abstract: The present invention relates to a side illumination lens and a luminescent device using the same, and provides a body, a total reflection surface with a total reflection slope with respect to a central axis of the body, and a linear and/or curved refractive surface(s) formed to extend from a periphery of the total reflection surface; and a luminescent device including the lens. According to the present invention, a lens with total internal reflection surfaces with different slopes, and a linear and/or curved refractive surface(s) allows light emitted forward from a luminescent chip to be guided to a side of the lens. Further, a linear surface(s) formed in a direction perpendicular or parallel to a central axis of a lens and a curved surface are formed on an edge of the lens so that a process of fabricating the lens is facilitated, thereby reducing a defective rate and fabrication costs of the lens.

Abstract: An apparatus comprises a light source, preferably an LED, a reflector, a light-conducting element mounted on the light source for directing light from the light source to an end of the light-conducting element, and a lens mounted on the end of the light-conducting element for directing light into a central beam. Light from the light source is directed to the reflector into a peripheral beam. The central and peripheral beams comprise substantially all of the light generated by the light source. The lens is in effect mounted on a pedestal above the LED. The pedestal transmits all the light rays in the central solid angle to the lens without loss.

Abstract: Illumination lenses (1806, 1902, 2002, 2100, 2200, 2300, 2400, 2500, 2600, 2700, 2800, 3006, 3100) having surfaces shaped according to given differential equations in order to distribute light in a highly controlled manner with minimum reflection losses are provided. Both primary lenses and secondary lenses are provided. The secondary lenses include outer surfaces that are defined as loci of constant optical distance from an origin at which a light source is located. Versions are provided of both the primary and secondary lenses having Total Internal Reflection (TIR) wings. These are useful in the case that narrower distributions of light are required. A method of refining the shape of the lenses to obtain more obtain lenses that produce better fidelity ideal light distributions is also provided.

Abstract: An optical lens includes a recessed part and a refracting part. The recessed part has a substantially circular plan view and a substantially V shaped cross-section. The recessed part forms an angle of no more than an angle of about 20° with respect to a vertical line. The recessed part has a plurality of curved surfaces including different radii so that a light incident into the recessed part is totally reflected from the curved surfaces. The refracting part has a substantially circular plan view extended from the recessed part. A light incident into the refracting part and the reflected light from the recessed part are refracted from the refracting part. Therefore, a luminance uniformity and a color uniformity are improved.

Abstract: A light source assembly provides an illumination beam and the light converging element is disposed on a transmission path of the illumination beam. A light converging element has a top end and a bottom end opposite to the top end. The light converging element is gradually reduced from the bottom end to the top end. The top end is opposite to the light source assembly and has a cavity. The illumination beam is incident into the light converging element from the cavity and exits the light converging element from the bottom end.

Abstract: A booklight for a protective cover for an eReader, wherein the protective cover includes a pocket for supporting the booklight, the booklight including a base, a light housing assembly having a light source, a manipulatable neck coupled between the base and the light housing assembly, and a base tab rotatably coupled to the base, wherein the base tab includes a first end rotatably coupled to the base tab, and a second end extending from the first end, wherein the second end is a free end, and wherein at least a portion of the free end is configured to engage the pocket of the protective cover.

Abstract: A light guide plate includes a body having a bottom surface and a light output surface opposite to the bottom surface. A reflector is located on the light output surface opposite to the center of the bottom surface. The reflector is a cavity concaved from the light output surface to the inside of the body. A plurality of scattering dots are located on the bottom surface. The scattering dots are arranged in the form of a plurality of concentric circles around the center of the bottom surface. The number of the scattering dots is defined based on a radius of the circle they reside on, and the radius of the circle is greater than or substantially equal to 4 millimeter.

Abstract: A vehicle headlamp is provided with an upper stage light source unit, a middle stage light source unit, and a lower stage light source unit. The upper stage light source unit, the middle stage light source unit, and the lower stage light source unit are provided at a lamp body constituting a lamp member by way of a support member. A low beam light distribution pattern is formed on a front side of a vehicle by overlapping light from the respective light source units. The lower stage light source unit includes two subunits, the two subunits commonly share a single cylindrical lens.

Abstract: Provided is an all-in-one type light guide plate including a plurality of prism-shaped structures that are integrally formed on the all-in-one light guide plate and which totally internally reflect light incident from a light source and emit the totally internally reflected light.

Abstract: A light emitting device comprises: an LED chip mounted in a recess formed in a mounting substrate; a wavelength converting member that is disposed so as to cover the recess and the edge area around the recess and that is excited by light emitted from the LED chip to emit light of a wavelength different from an excitation wavelength; and an emission control member disposed at a light output side of the wavelength converting member so as to allow emission of light coming from an area of the wavelength converting member that corresponds to the recess and to prevent emission of light coming from an area of the wavelength converting member that corresponds to the edge area around the recess. This can prevent variations in color between light emitted from the central part of the wavelength converting member and light emitted from the part of the wavelength converting member that is located on the edge area around the recess of the mounting substrate, thereby reducing unevenness of color on the irradiation surface.

Abstract: An optical module for projecting a light beam comprises a solid body of transparent material into which a light source is sunk and which is delimited by an annular surface and by a central surface, and a substantially annular reflecting surface arranged around the solid body. The central and annular surfaces are suitable for receiving respective distinct portions of the luminous flux produced by the source. The reflecting surface may have a reflecting coating or may form part of a transparent body, in which case it works by total internal reflection. The reflecting surface reflects a portion of luminous flux refracted by the annular surface and shapes the flux into a predetermined distribution of luminous intensity about the principal axis. The annular surface is designed in a manner such as to reduce the overall thickness of the module by moving the refracted ray away from the principal axis.

Abstract: A lighting lens can sufficiently suppress unevenness color and improve light use efficiency. This light lens has: first incidence surface 20 that is orthogonal to the optical axis; second incidence surface 21 that expands the radius toward the light emitting element 8 side; total reflection surface 22 that expands the radius toward the emitting side; first emission surface 24 that mainly emits light incident on first incidence surface 21, toward illuminated surface 18; and second emission surface 25 that emits light incident on a second incidence surface, toward illuminated surface 18, and forms second emission surface 25 such that positive power in second emission surface 25 is weaker than positive power of first emission surface 24.

Abstract: A light guide plate includes an incident face, a bottom surface, a main reflective structure and an auxiliary reflective structure. The bottom surface is connected to the incident face. The main reflective structure is disposed on the bottom surface and has a first and a second inclined surface. The auxiliary reflective structure is disposed on the bottom surface and has a third and a fourth inclined surface. The auxiliary reflective structure and the main reflective structure have an interval therebetween, in which the interval ranges between 0.2 micrometer and 0.5 micrometer, and a bottom width of the auxiliary reflective structure on the bottom surface is smaller than a bottom width of the main reflective structure on the bottom surface. A liquid crystal display is also disclosed herein.

Abstract: A luminaire for providing broad uniform surface illumination and sharp cutoff which has at least one quasi point light source, such as an LED, located on an optical axis. There is at least one collimating ring lens which, at least partially surrounds the quasi point light source. The collimating ring projects a radial collimated beam and there is at least one reflective ring, at least partially surrounding the collimating ring lens. The reflecting ring reflects and redirects the collimated radial beam as a canted radial beam through the optical axis. In another embodiment at least one off axis collimating ring lens at least partially surrounds at least one quasi point light source, and projects a canted radial beam away from the optical axis. There is at least one ring reflector which at least partially surrounds the optical axis and is positioned to reflect the canted radial beam toward and through the optical axis.

Abstract: Practical for use to make a road divider/reflector or a solar collector, a light distribution panel is disclosed to include four faces that can be planar or arched faces and constitute a light distribution curve to control the moving direction of light. When used in a lamp, light is evenly distributed onto the expected illumination area, avoiding formation of Gauss distribution and providing broad area illumination. When used as a road reflector, the light distribution panel provides excellent driving safety effect. When used in a solar collector system, the light distribution panel collects a wide range of incident light.

Abstract: An optical sheet includes a substrate having rear and front surfaces, a micro-lens-array on the front surface of the substrate, the micro-lens-array including a plurality of micro-lenses, a plurality of protrusions spaced apart from each other on the rear surface of the substrate, and an intercepting reflector layer on the protrusions.

Abstract: A TIRing condensing element and methods thereof includes a first section and a second section. The first section provides substantially total internal reflection of light entering at a base of the first section. The second section tapers from a first section towards an optical axis of the element extending through the second section to output light from the first section. The first and second sections are configured so a half-power angle of the light output from the second section is less than the half-power angle of the light entering the first section.

Abstract: An optical arrangement comprising a light guide (101) having a light-entry portion (103) with a light-entry surface (105), a tapering portion (107) with a light reflecting surface, and a light-exit surface (109). The light-entry portion (103) is arranged to guide light from the light-entry surface (105) in a first direction (x) towards the light reflecting surface (H I), the light reflecting surface being arranged in relation to the first direction (x) so that incident light from the light-entry portion (103) is reflected towards the light-exit surface (109). A light transmitting layer (113) is adapted to transmit light diffusively and arranged to cover at least a portion of the light-entry edge surface (105) of the light guide (101). The arrangement is e.g. suitable for use in a LED based luminaire and allows for efficiency and forming of a light beam able to fulfill glare requirements. The arrangement may advantageously be used in a downlighting application.

Abstract: An improved lampshade of an LED lamp, assembled onto the port of hold tank on the main body of LED lamp so that light-reflection modules located between port of hold tank and LED modules in the hold tank are positioned securely. The lampshade has a circumferential locating surface and a limitation surface. The circumferential locating surface is adapted with the wall edge of hold tank to define an inner edge and an external edge. The limitation surface is recessed into the circumferential locating. A snapping portion is placed at the coupling portion of the circumferential locating surface and wall edge of the hold tank for positioning of the lampshade.

Abstract: By a convex lens arranged on an optical axis extending in a front and rear direction of a lamp unit, direct light from a light emitting element arranged rearward of the convex lens is deflected to emit so that the light is made to be parallel light in a vertical face and diffused light toward left and right sides in a horizontal face. An entire region of a left side lens region of the convex lens is constituted as upper deflecting regions for deflecting light to a direction upward with respect to a direction of light of a right side lens region. Light emitted to the front side by transmitting the respective upper deflecting regions is made to be light directed upward from light emitted from the right side lens region to thereby form a laterally elongated light distribution pattern in which an upper end edge of a portion of being disposed on a left side relative to the optical axis is stepped up from an upper end edge of a portion thereof disposed on a right side.

Abstract: In a light guide plate and a backlight unit, a light guide plate includes a light incident surface, an opposite surface, a top surface, a bottom surface, and a plurality of optical path changing units. The optical path changing units are aligned on at least the bottom surface of the top surface and the bottom surface at a predetermined interval while protruding in parallel to a reference line perpendicular to the light incident surface. Accordingly, power consumption used to generate the light may be reduced.

Abstract: A spread illuminating apparatus of side light type includes a transparent resin plate, a reflector disposed at one major surface of the transparent resin plate, and a light source disposed in a light source space formed toward one end of the transparent resin plate, wherein the reflector includes a main part having a rectangular shape and fold parts formed at peripheral edges of the main part so as to rise up therefrom, slits are formed through portions of the transparent resin plate located inside and off its peripheral edges, and wherein the fold parts of the reflector are inserted though the slits of the transparent resin plate.