Abstract: The present disclosure relates to a lens and a lighting fixture, the lens includes a light incident portion and a light-emitting portion, the light-emitting portion includes a main light-emitting surface and an auxiliary light-emitting surface surrounding the main light-emitting surface. The main light-emitting surface and the auxiliary light-emitting surface protrude toward a side away from the light incident portion, the auxiliary light-emitting surface is a curved surface. The auxiliary light-emitting surface has a protruding height gradually decreasing in a direction away from the main light-emitting surface. The lighting fixture includes a lamp housing, a light-emitting assembly, and a light distribution assembly, the light distribution assembly includes the above lens.

Abstract: A light flux controlling member includes a plurality of incidence units disposed in a grid pattern and a plurality of emission units individually disposed between the plurality of incidence units. Each incidence unit includes an incidence surface disposed on a back side of the light flux controlling member, a first reflection surface disposed on a front side of the light flux controlling member at a position facing the light emitting element with the incidence surface placed between the first reflection surface and the light emitting element, and a second reflection surface disposed on the front side of the light flux controlling member at a position facing the side surface of the light flux controlling member with the first reflection surface placed between the second reflection surface and the side surface.

Abstract: A light flux controlling member includes a first optical surface, a second optical surface, a third optical surface, and a fourth optical surface. A part of light emitted from the light-emitting element and entered from the first optical surface is emitted from the second optical surface to outside of the light flux controlling member after being sequentially internally reflected by the second optical surface, the third optical surface and the fourth optical surface. A part of light emitted from the light-emitting element that is incident on the first optical surface is Fresnel-reflected, reflected by a surface of the substrate toward the first optical surface to enter the light flux controlling member from the first optical surface, and then emitted from the second optical surface to the outside of the light flux controlling member.

Abstract: A multi-color LED illumination device and specifically a lens comprising a cylindrical opening extending into the lens from a light entry region at which one or more LEDs are configured. A concave spherical surface extends across the entirety of the light exit region of the lens, and a TIR outer surface shaped as a CPC extends between the light entry region and the light exit region. There are various diffusion surfaces placed on the sidewall surface of the cylindrical opening, as well as its upper planar surface and the exit surface of the lens. Lunes can also be configured on the sidewall surfaces of the cylindrical opening. The combination of lunes, diffusion elements, and the overall configuration of the lens provides improved color mixing and output brightness using three interactions in a first portion of light and two interactions in a second portion of light.

Abstract: A method for producing a styling arrangement for a lighting device of a vehicle, wherein a utilized light component of a light emitted by the light source is deflected by means of an optical unit to create a lighting function, and wherein a spill light component emitted by the light source is incident on the styling arrangement to illuminate the same, wherein a carrier part is provided, a multiplicity of design elements are integrally formed on its at least one flat side to produce a design component, in that the carrier part is bent about an axis extending transversely to long sides of the same, and in that the carrier part is attached by tabs integrally formed thereon to a support frame that holds a component of the lighting device.

Abstract: A micro-LED, ?LED, comprising: a substantially parabolic mesa structure; a light emitting source within the mesa structure; and a primary emission surface on a side of the device opposed to a top of the mesa structure; wherein the mesa structure has an aspect ratio, defined by (H2*H2)/Ac, of less than 0.5, and the ?LED further comprises a reflective surface located in a region from the light emitting source to the primary emission surface, wherein the reflective surface has a roughness, Ra, less than 500 nm.

Abstract: A lighting device includes a series of optical waveguides, each optical waveguide being adapted to guide light rays between an entry face and an exit face, the optical waveguides being formed of a first subassembly and a second subassembly produced separately and each including a portion of the series of optical waveguides and including structural elements to retain the optical waveguides in position. The first subassembly and the second subassembly are adapted to be assembled to form the lighting device by cooperation of the structural elements, and the first subassembly includes a first structural element adapted to connect proximal ends of the optical waveguides and a second structural element distinct from the first structural element and adapted to connect distal ends of the optical waveguides.

Abstract: A motor vehicle lamp is presented, having an elongated waveguide, which is configured to conduct light in its interior, via total internal reflection occurring on border surfaces of the waveguide, along a guidance line of the waveguide, predefined by the external shape of the waveguide and running inside the waveguide, wherein the waveguide has a light exit surface. The lamp is distinguished in that it has a focusing element, which lies in the light path of the light emitted via the light exit surface, and extends thereby over the entire length of the light exit surface, and is configured to reduce the beam width of the light bundle in which the light emitted from the light exit surface is propagated.

Abstract: A lighting module is provided that includes a single-piece lens having an input surface including a plurality of near-field lens elements, and an exit surface, each element having a different focal length. The lighting module also includes light-emitting diode (LED) source positioned to direct incident light through the input surface. Further, the elements are configured to shape the light from the input surface into a collimated light pattern emanating from the exit surface containing at least 60% of the incident light.

Abstract: An optic can receive light from a dome of a light emitting diode and output light that, when cast upon a nearby flat surface, forms a strip of illumination. The optic can comprise a cavity that receives the light from the dome and an outer surface that emits the received light. An edge of the cavity can extend peripherally around the cavity in an oblong geometry. An edge of the outer surface can extend peripherally around the outer surface in an oblong geometry that is rotated ninety degrees relative to the oblong geometry of the cavity. A sidewall of the outer surface can comprise a region that is concave in nature or sags.

Abstract: The present invention relates to a ceiling-mounted light fixture configured to be embedded in the ceiling. The ceiling-mounted light fixture comprises: a cylindrical light fixture body having a screw thread formed on the lower end of the outer surface thereof; a light source unit which is accommodated inside the light fixture body and which has a light-emitting element; and a ring-shaped cap which has a screw thread formed on the inner surface thereof to be coupled to the screw thread of the light fixture body. According to the present invention, a ceiling-mounted light fixture is provided, wherein the diameter of the cylinder of the light fixture is increased to achieve improved light distribution efficiency and enable easy assembly.

Abstract: A light source module includes a light source and an optical lens facing the light source. The optical lens includes a light incident face facing the light source, a light emitting face opposite to the light incident face, and a connecting face connecting the light incident face and the light emitting face. The connecting face is planar. The light emitting face includes a lateral face extending upwardly from an outer periphery of the connecting face and a top face located above the light incident face. The top face of the light emitting face includes a center facet facing the light incident face, a first curved facet surrounding and connecting to the center facet, and a second curved facet surrounding and smoothly connecting to the first curved facet.

Abstract: A pillow optic array comprising a plurality of first order pillow optic elements arranged as a two-dimensional grid with a plurality of interstice spaces between adjacent first order pillow optic elements. Each of a plurality of second order pillow optic elements, located within respective interstice spaces. Pillow optic elements of the second order have a predetermined dimension that is less than a predetermined dimension for pillow optic elements of the first order. A ratio of a cross-sectional width of pillow optic elements to a cross-sectional height of pillow optic element is the same proportion for each order of pillow optic elements in the pillow optic array, the cross-sectional width being located in a plane along the pillow optic array and the cross-sectional height located in a plane vertical to the pillow optic array. The higher order pillow optic elements touching, about tangentially, a lower order pillow optic element.

Abstract: The present invention provides an illumination beam shaping system, which enables the emergent surface of a lighting system of light excitation chips to emit a light beam of uniform illumination brightness. The present invention uses a dividing device, structured from curved lenses arranged in an array, to effect a pre-dividing operation on the total quantity of light from a light excitation chip, after which post-diffusion is carried out to form a light beam with uniform illumination brightness. A plurality of conical light beams in an array are shaped and emerge from an output side, and the bottom portion of each of the conical light beams form an actual optical surface, which act on an optical diffusing component for refraction and diffusion processing, thereby enabling the emergent face of the system to obtain uniform illumination brightness.

Abstract: A multi-focal lens for a lighting device includes a central portion and multiple peripheral portions around the central portion. The central portion has a central convex refracting surface, and each peripheral portion has an oblique refracting surface and a convex refracting surface opposite to the oblique refracting surface, wherein the oblique refracting surface extends at an angle with respect to the optical axis of the multi-focal lens. The central portion and the peripheral portions share a common flat surface opposite to the refracting surfaces of the central portion and the peripheral portions. The convex refracting surface and the oblique refracting surface of each peripheral portion can change the paths of corresponding light rays refracted from the flat surface to increase the distance and area of illumination. Furthermore, the volume and thickness of the lens required for a lighting device can be reduced, so that the production cost can be reduced.

Abstract: This disclosure provides systems, methods and apparatus for providing a desired illumination pattern within a given plane. In one aspect, a light wash system can be configured to provide substantially even illumination on a wall or floor. The light wash system can use light-shaping optics such as a stack of optical films to provide a light wash system which is smaller than conventional light wash systems which utilize parabolic reflectors. The light wash system may include an internal retroreflector to allow a wider range of throw distances for the light wash system.

Abstract: An optical lens for adjusting viewing angle of and diffusing light emitted from a light emitting diode includes a light incident surface and a light emitting surface. The light incident surface is cone-shaped and concave towards the light emitting surface. The light emitting surface is cone-shaped and concave towards the light incident surface. A plurality of annular protrusions is formed on the light incident surface. The annular protrusions are coaxial and a center of each of the annular protrusions is located at an optical axis passing through a vertex of the light emitting surface and a vertex of the light incident surface. A lighting device having the optical lens and the light emitting diode is also provided.

Abstract: In an illuminating device, when exiting lights come out from a lens sheet, the optical paths of the exiting lights are deflected in a direction opposite to an optical axis of a light source by means of a plurality of prisms which are included in a first lens group arranged on an inward side of the lens sheet located adjacent to the optical axis of the light source and each of which has a inclined face facing toward the optical axis of the light source, wherein the exiting lights from the light source via the first lens group of the lens sheet are adapted to mix with exiting lights from the light source via a second lens group located outside the first lens group, whereby the degree of color unevenness is reduced, that appears inherently when a pseudo white LED is used as the light source of the illuminating device.

Abstract: A light tube includes a tube body, at least one light emitting diode, and a transparent cover. The light emitting diode is assembled with the tube body. The transparent cover is disposed on the tube body to cover the light emitting diode and has a roof portion and two side arm portions. A first microstructure region and a second microstructure region are formed on a surface of the roof portion corresponding to the light emitting diode. The second microstructure region extends from two ends of the first microstructure region. A third microstructure region is formed on a surface of each side arm portion corresponding to the light emitting diode. A microstructure density of the second microstructure region is less than or equal to a microstructure density of the first microstructure region, and is greater than or equal to a microstructure density of the third microstructure region.

Abstract: A lens is provided in an asymmetric shape including at least two curved surfaces with different light distribution angles. Therefore, uniformity ratio of illuminance and coefficient of utilization (CU) may be increased while reducing dazzle. When a lighting apparatus including the lens is used as a street light, light directly incident to a driver is minimized, thereby reducing dazzle to the driver. During a night drive, brightness at a far forward position of the driver may be increased. In addition, light emitted toward a street may be increased while reducing light emitted toward a sidewalk. As a result, uniformity ratio of illuminance and coefficient of utilization (CU) may be increased. Also, light pollution may be reduced.

Abstract: The zoom lens with multi-layers for illumination mainly comprises a lens body that has at least one free curved surface on a side. The free curved surface is designed to be multiple zoom curved surfaces with multiple layers. Besides, one side of the curved surface is designed to be oblique and the other side is arc surface. Hence, the curved surface can be divided into multiple patterns with multiple focuses through the various combinations of complex free curved surfaces.

Abstract: A lens includes a light incident face, a light exit face opposite to the light incident face and a plurality of micro dot patterns formed on the light exit face. The light incident face is a concave face and the light exit face is a convex face. The plurality of micro dot patterns are positioned at a central portion of the light exit face. A light source module incorporating the lens is also provided. The light source module includes a light emitting diode emitting light into the lens through the light incident face. The micro dot patterns direct the light from the light emitting diode and through the central portion of the light exit face toward a peripherial side of the lens.

Abstract: The invention relates to an optical lens utilized for disposing above a light source. The optical lens has rotational symmetry relative to the central axis thereof. The central axis of the optical lens aligns with the center of the light source. The optical lens includes a bottom surface, an emergence surface with arc shape, an incidence surface with arc and concave shape, a curved surface with annular and concave shape and a light diffusing structure. The emergence surface connects a side of the bottom surface. The incidence surface connects another side of the bottom surface and lies in the middle of the bottom surface. The curved surface lies on the bottom surface and connects the incidence surface. The light diffusing structure is disposed on the curved surface.

Abstract: There are provided an optical lens and a light source module, and a street lamp having the same. The optical lens includes a concave dome shaped inner surface formed to have a similarly-oval shaped lower surface, and formed to include a plurality of light incident surfaces formed to be stepped along the inner surface thereof and stepped surfaces connecting the plurality of light incident surfaces to one another; and an outer surface formed to surround the inner surface.

Abstract: A vehicle light using a projection lens of a novel appearance can provide a feeling of solidness as compared to a simple spherical shape. The vehicle light can include a projection lens having an optical axis and a plurality of separate lens portions divided in a radial pattern with respect to the optical axis of the projection lens. The separate lens portions can have respective light exiting surfaces of different curvatures, and respective light incident surfaces, the shapes of which are determined such that the separate lens portions have the same thickness and the same focal point.

Abstract: A condensing element includes an outer section having a circumferential curved sidewall extending between a light input surface at one end and a light output surface at the other end that provides substantially total internal reflection of light emitted from the input surface and incident upon the sidewall of the outer section. A circumferential curved inner section is recessed within the outer section such that the light emitted from the input surface and incident upon the curved inner section is not incident upon the output surface. A circumferential substantially non-curved sidewall extends from the inner section to a circumferential substantially non-curved upper section positioned at approximately a 45° angle relative to the optical axis of the light emitted from the input surface. A light-absorbing plug is in communication with the upper section, wherein the light emitted from the input surface is condensed and directed in a sideways direction relative to the optical axis of the entering light.

Abstract: There is presented a vehicle headlamp with an imaging optics that is designed to project, as light/dark boundary, into the area in front of the vehicle headlamp, an edge that delimits a light flux of a light source of the vehicle headlamp, a boundary surface of a component of the imaging optics, through which the light flux penetrates, having an overhead element in the form of a local deformation of the boundary surface having a prismatic effect by means of which the light is deflected into an overhead area lying over the light/dark boundary. The vehicle headlamp is distinguished by the fact that the boundary surface has more than one hundred overhead elements distributed discretely over the boundary surface.

Abstract: This disclosure provides systems, methods and apparatus for providing a desired illumination pattern within a given plane. In one aspect, a light wash system can be configured to provide substantially even illumination on a wall or floor. The light wash system can use light-shaping optics such as a stack of optical films to provide a light wash system which is smaller than conventional light wash systems which utilize parabolic reflectors. The light wash system may include an internal retroreflector to allow a wider range of throw distances for the light wash system.

Abstract: A microstructure for electroluminescent (EL) elements comprises a plurality of microconvexities having circular bottom surfaces. Each microconvexity is defined by a generatrix dropped from the peak to the circumference of the bottom surface. The height of the generatrix is monotonically reduced from the peak to the circumference. The height of the peak may be 0.67-1.15 times the radius of the bottom surface. The height of the convexities at a position on the radius of the bottom surface 3/4 away from the center of the bottom surface may be 0.21-0.65 times the radius of the bottom surface. The height of the convexities at a position on the radius of the bottom surface 9/10 away from the center of the bottom surface may be 0.04-0.38 times the radius of the bottom surface.

Abstract: The invention relates to a method for producing a headlamp lens (2) for a vehicle headlamp, in particular for a motor-vehicle headlamp (1), wherein the headlamp lens (2) comprises a transparent body (3) with an optically effective surface (5), which is in particular substantially planar and can be turned towards a light source (10), and an optically effective surface (4), which is in particular convex and can be turned away from the light source (10), wherein the gradient of a light-dark boundary (25) projected by the headlamp lens (2) or a further headlamp lens is measured, and wherein a light diffusing structure (35) is produced in the transparent body (3) in accordance with the measured gradient.

Abstract: A projection assembly is arranged to be added onto or built into at least one LED-unit or other light-unit of an illuminated object that has more than one LED or other light source to cause the object to be illuminated and show the object's design or appearance while also offering illumination to people. The illuminated object may include all kinds of seasonal lighting, regular light fixtures, track lights, desktop lights, and battery operated lights having more than one light-unit or LED-unit.

Abstract: Disclosed herein is an indication plate including: a plate member including a light-transmitting material; and an indication part provided at a surface on one side with respect to the thickness direction of the plate member, wherein the indication part includes a light-shielding part including a light-shielding material and covering the surface on one side, and a convex portion including the light-transmitting material, the convex portion projecting from the surface on one side and being exposed from the light-shielding part; the convex portion has a circumferential surface projecting from the light-shielding part, and an end face connecting tip portions of the circumferential surface to each other, and a metallic foil having a light-transmitting property is attached to the end face.

Abstract: An apparatus and method is characterized by providing an optical transfer function between a predetermined illuminated surface pattern, such as a street light pattern, and a predetermined energy distribution pattern of a light source, such as that from an LED. A lens is formed having a shape defined by the optical transfer function. The optical transfer function is derived by generating an energy distribution pattern using the predetermined energy distribution pattern of the light source. Then the projection of the energy distribution pattern onto the illuminated surface is generated. The projection is then compared to the predetermined illuminated surface pattern to determine if it acceptably matches. The process continues reiteratively until an acceptable match is achieved.

Abstract: A luminous flux control member can stabilize an optical performance, make manufacturing easy and improve efficiency of use of light at the same time. A reflection surface (15) is formed in a surface shape, so that an extreme end section of the reflection surface (15) that is the most distant from an emission area (5) is positioned further inward in the radial direction than a base end section that is the closest to the emission area (5), and the reflection surface (15) intersects once a virtual surface that is inclined with respect to an optical axis connecting between the extreme end section and the base end section. The surface shape suppresses an offset of a light distribution of light emitted from the emission area (5) from a designed light distribution due to an offset between an optical axis and the center axis of light emitted from a light source.

Abstract: A light guide lens includes: an outer surrounding surface that extends between a front surface disposed at an optical axis, and a rear end formed with a recess that has an end surface disposed at the optical axis, and an inner surrounding surface extending rearward from a periphery of the end surface. The outer surrounding surface diverges forwardly along the optical axis, and includes first and second pairs of curved surface parts, the first pair being disposed mutually asymmetrical on opposite sides of an imaginary plane, the second pair being disposed mutually symmetrical on opposite sides of another imaginary plane and extending between the first pair. The end surface includes a third pair of curved surface parts disposed mutually asymmetrical on opposite sides of yet another imaginary plane.

Abstract: A total internal reflection (TIR) lens has an integrated lamp cover adapted to a lamp of a desired form factor (e.g., PAR-38). The size and shape of the TIR lens can be adapted to optimize the light output of the lamp with little regard to the desired form factor. The integrated lamp cover can extend the front surface of the TIR lens in a direction transverse from the optical axis.

Abstract: There are provided an optical lens and a light source module, and a street lamp having the same. The optical lens includes a concave dome shaped inner surface formed to have a similarly-oval shaped lower surface, and formed to include a plurality of light incident surfaces formed to be stepped along the inner surface thereof and stepped surfaces connecting the plurality of light incident surfaces to one another; and an outer surface formed to surround the inner surface.

Abstract: An illuminating device includes a light source and a light receiving surface, first and second light exit surfaces. When a point at the edge of the light emitting surface is P2 and an axis which passes through a center P1 of a light emitting surface and is perpendicular to the light emitting surface is an optical axis, the optical element has a hollow around the optical axis. The first light exit surface is such that x coordinate of a point most distant from the optical axis on the first light exit surface is at least 1.5 times x coordinate of P2, that in 80% or more of an area in which x coordinate of a point is at least the x coordinate of another point P3, an angle of incidence of light emitted at P1 is at least the critical angle and that in 80% or more of an area in which x coordinate of a point is equal to or smaller than x coordinate of another point P4, an angle of incidence of light emitted at P2 is smaller than the critical angle.

Abstract: The present invention relates to an integrated structure for an optical refractor, and more particularly to an integrated structure between a circuit board and an optical refractor which enables exposing the light source after dismantling to facilitate replacement and maintenance thereof. The integrated structure is composed of a planar baseplate, centrally integrated with an optical refractor lens, and the bottom surface of the baseplate is provided with a male end clasping portion parallel to the incident light surface, the male end clasping portion being further provided with position fixing tenons used for fixing position and clasp pins used for clasping, thereby enabling convenient disassembly and replacement to facilitate exposing the light emitting crystal on the front surface of the circuit board to enable maintenance and replacement.

Abstract: The present invention relates to a lens module for LED lamp, comprises a base installed with a first chamber and a second chamber opposite to the first chamber, the first chamber is able to be connected with a substrate, and at least one LED module is installed on the substrate; a first lens; and a second lens. With the mentioned structure, lights emitted by LED modules can be refracted by the first lens and the second lens for achieving the purpose of unifying lights. Moreover, the base, the first lens and the second lens are made of transparent material and formed with an injection molding means for lowering the production cost.

Abstract: A headlight can form a light distribution pattern that prevents uneven brightness when the headlight is set to a high beam mode, and also minimizes power consumption when the headlight is set to the high beam mode. The vehicle light can include a multi-focal lens that has a mid-level lens portion, an upper-level lens portion, and lower-level lens portion. A separator plate can have a front edge positioned at or near the focal point of the mid-level lens portion. Light emitting elements can be mounted on top and bottom of the separator plate, respectively. A first elliptical reflecting surface whose first focal point is set at or near the first light emitting element and whose second focal point is set at or near the focal point of the mid-level lens portion can be provided. A second elliptical reflecting surface can also be provided whose first focal point is set at or near the second light emitting element and whose second focal point is set at or near the focal point of the upper-level lens portion.

Abstract: A two-side illuminating lens body mainly projecting light from a light emitting device to two relative outer directions includes a base with a receiving slot having a downwards opening for receiving a lighting device. A concave arc for receiving the light emitting portion of the lighting device is formed above the receiving slot as a light incident side. On a top surface of the base, two symmetrical non-spherical protrusions are jointly arranged beside a center light axis. A concave curved surface is formed to a border of the two non-spherical protrusions. Two symmetrical awl laterals are formed on relative outer edges of the non-spherical protrusions. Through three different refracting types of the concave curved surface, non-spherical protrusions, and awl laterals, rays from the light emitting device will be gradually diffused away from the center light axis so that a double-side skew light distribution of illumination like a butterfly is projected.

Abstract: A ring lamp includes a light source having a first hollow cylinder with a lighting device disposed therein. The light source has an emitting surface with a light-emitting direction oriented toward an axis of the hollow cylinder. The lamp also includes a light directing device configured to direct light emission. The light directing device includes a lens system having a lens formed as a second hollow cylinder and configured to focus light into a radial plane which is orthogonal to the axis. The lens system has a ring-shaped aperture diaphragm disposed centrally in an optical path of the light emission behind the lens. The emitting surface of the light source and the lens system have a same length, are coaxial and axially aligned with each other. A radial surface which is defined by an inner radius of the lens system and the length of the lens system spans a delimited volume.

Abstract: A total internal reflection (TIR) lens has an integrated lamp cover adapted to a lamp of a desired form factor (e.g., PAR-38). The size and shape of the TIR lens can be adapted to optimize the light output of the lamp with little regard to the desired form factor. The integrated lamp cover can extend the front surface of the TIR lens in a direction transverse from the optical axis.

Abstract: An optical element, a light-emitting component and a direct-lit backlight module having the optical element are provided. The optical element includes a bottom surface, at least one side refractive surface for refracting one part of a light beam incident from the bottom surface, and an upper refractive surface for refracting the other part of the light beam incident from the bottom surface. A maximum included angle formed between the light beam incident from the bottom surface and to be irradiated onto the side refractive surface and the bottom surface is a first angle (?). An included angle formed between a light beam coming out from at least one side refractive surface and the bottom surface is smaller than or equal to the first angle. A maximum included angle formed between the light beam incident from the bottom surface and to be irradiated onto the upper refractive surface and a central axis of the optical element is a second angle (?).

Abstract: An LED light source device using light from luminescent elements at a high level of uniformity and efficiency, and to conduct irradiation with a high level of design freedom an LED light source device is equipped with luminescent elements and a translucent light-guiding member. The translucent light-guiding member has a central convex lens with a first cylindrical light-guiding part formed on the outer periphery of the central convex lens and a second cylindrical light-guiding part formed on the outer periphery of the first cylindrical light-guiding part, such that an air layer is formed between the outer peripheral surface of the first cylindrical light-guiding part and the inner peripheral surface of the second cylindrical light-guiding part, the outer peripheral surface of the first cylindrical light-guiding part and the outer peripheral surface of the second cylindrical light-guiding part being rotated quadratic surfaces with the same focal point.

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 backlight module (300) includes a plurality of illumination devices (100). Each of the illumination devices includes a light guide block (120) and a point light source (140) optically coupled with the light guide block. The light guide block includes a light exit surface (121), a bottom surface (123) opposite to the light exit surface, and a tapered portion (122) located between the light exit surface and the bottom surface. The bottom surface has a receiving hole (1232) formed therein. The tapered portion includes an outside surface (1221) and a prism array (1224) formed on the outside surface. The point light source is secured in the receiving hole. The plurality of illumination devices are joined with one another and the light exit surfaces of light guide blocks are substantially coplanar and whereby cooperatively constitute a light output surface of the backlight module.

Abstract: A lens for a light emitting diode package and a light emitting diode package having the same have simple structures and increase light extraction efficiency by preventing light emitted from a light emitting diode chip from being internally reflected by a lens surface through a structural change in the lens surface.

Abstract: An exemplary optical plate includes a transparent layer and a light diffusion layer. The transparent layer includes a light input interface, a light output surface opposite to the light input interface, and a plurality of micro-depressions formed on the light output surface. The micro-depressions are arranged along a plurality of imaginary, separate, circular arcs. Each micro-depression has at least three side surfaces connected to each other, and a transverse width of each side surface increases along a direction away from the light diffusion layer. The light diffusion layer is integrally formed in immediate contact with the light input interface of the transparent layer, and free of air or gas pockets trapped in an interface therebetween. The light diffusion layer includes a transparent matrix resin and a plurality of diffusion particles dispersed in the transparent matrix resin.