Abstract: The present invention relates to a reflector for light emission sources, having a rotational symmetry about an axis, an apex comprising a first opening of size such to accommodate a light source and a second opening, larger in size than the first opening, adapted to let out the direct light emitted by said light source and the light reflected by the internal surface of the reflector, surface which is characterized by a series of segments comprising a plurality of approximately rectangular surface segments in turn comprising a plurality of reliefs, preferably having a substantially hemispherical shape, and characterized by a convexity facing towards the inside of the reflector, said convexity being characterized by a single curvature radius.

Abstract: A lateral planar light emitting module has a rectangular base plate and a plurality of light emitting diodes, and the light emitting diodes are designed with an array arrangement and installed on both opposite sides of the rectangular base plate respectively, so that a light exit surface opposite to a light projection area with a different intensity produced by the same light emitting diode has an optical path with a different distance after a light source emitted from the light emitting diodes is projected directly or reflected from a reflective micro-structure of the rectangular base plate, and a light emitting effect with a uniform light intensity distribution is achieved on the light exit surface to lower the manufacturing cost and improve the light emitting efficiency effectively.

Abstract: Lighting devices are provided including those which have an array of spatially distributed optoelectronic sources, each source being adapted to emit a respective incident optical beam; a first reflector having an optical axis, and having a first reflective surface that is concave and facing the array of sources to intercept said incident optical beams and to produce corresponding reflected optical beams; a second reflector having a second reflective surface interposed along said optical axis between said array of optoelectronic sources and the first reflector adapted to intercept and deflect said reflected optical beams producing corresponding deflected optical beams, the first reflector being adapted to concentrate the reflected optical beams on the second reflective surface.

Abstract: An optical transmission apparatus having a temperature control function includes: a package having a cavity; a cooler mounted in the cavity and controlling temperature; and a substrate mounted on the cooler and including a light source mounted thereon to generate light. In spite of the presence of the cooler, the apparatus can be implemented to be compact and have a simple structure.

Abstract: A light source device includes a LED light source or a wavelength conversion material having a near Lambertian light emitting surface. The light source device includes a light recycling system to reflect small-angle lights (lights closer to the normal direction of the light emitting surface) back to the light source, and a collection system for collecting and outputting large-angle lights (lights farther away from the normal direction). The lights reflected by the light recycling system is scattered by the emitting surface in all directions, where the large-angle scattered lights are collected by the light collection system and the small-angle scattered light is reflected by the light recycling system again. A second excitation light source without wavelength conversion material or a second light source with its own wavelength conversion material may be provided, and the second light is directed to the light emitting surface by appropriate optical components.

Abstract: A backlight assembly including a container having a light exiting boundary, and a light source part. The container includes a first light source supporting part supporting first and second light sources, and a reflector extending from the first light source supporting part. The reflector reflects the light from the first and second light sources to guide the light to the light exiting boundary. The first light source is disposed under the light exiting boundary and generates the light. The second light source is spaced apart from the first light source in a first direction by a first distance. The first direction is substantially parallel with the light exiting boundary. The second light source is spaced apart from the light exiting boundary in a second direction by a first depth. The second direction is substantially perpendicular to the light exiting boundary.

Abstract: This display includes point light sources, a light guide plate including a light-receiving surface on which light emitted from the point light sources is directly incident, opposed to the point light sources, and a display cell provided on a surface of the light guide plate, while a plurality of projecting portions each having a width smaller than a width of each of the point light sources in an extensional direction of a side of the light guide plate provided with the light-receiving surface are provided on a region of the light-receiving surface of the light guide plate opposed to the point light sources, and the plurality of projecting portions of the light guide plate are formed to have irregularly different shapes.

Abstract: Disclosed is a luminaire having a light exit window (30) for emitting light from the luminaire, and a reflective screen (40) arranged opposite the light exit window. The luminaire further includes a light source (20) which is arranged for indirect illumination of the light exit window via the reflective screen. The light source is arranged near the light exit window on an imaginary plane P substantially parallel to the light exit window and emits light away from the light exit window. The luminaire further includes a specularly reflective part (43) as part of the reflective screen, which specularly reflective part is concavely shaped for reflecting at least part of the light emitted by the light source towards a diffusely reflective part (42) of the reflective screen.

Abstract: A curved wall, square-shaped reflector assembly includes multiple reflector wall sections and multiple enclosure wall sections. Each reflector wall section is slidably coupled to a respective enclosure wall section by positioning a top reflector flange of the reflector wall section above a top support flange of the enclosure wall section and aligning alignment features on the enclosure wall section with holes on the reflector wall section. In addition, a bottom flange of the reflector wall section is positioned below a bottom edge of the enclosure wall section, thereby providing a consistent tension along the wall surface of the reflector wall section. Each enclosure wall section includes flange members on opposing side edges. Each of the combined reflector-enclosure wall sections are positioned orthogonal to one-another and coupled together along the adjacent flanges from the adjacent enclosure wall sections with rivets. The assembly reduces light leak without damaging the reflector surface.

Abstract: A bicycle light for securing to a handlebar or other part of a bike, or to a rider's helmet, has an angled front face that allows use of a single, flat LED circuit board with one or more deep conic or parabolic reflectors positioned in front of the upper part of the board and one or more shallow reflectors in front of the bottom part of the board. This provides for both a spot beam produced by the deep reflector and flood light produced by the shallow reflector, in a compact and efficient assembly. Another important feature of the device is side lighting which can be independently controlled, important in affording the rider side lighting while in street traffic but the option to pulse or switch off the side lighting when riding on a trail.

Abstract: A light-emitting device comprising at least: a metal layer able to be heated and to propagate surface waves consecutive to the heating of the metal layer, with the metal layer being structured such that it comprises several diffraction patterns able to carry out a diffraction of the surface waves to free-space propagation modes, and wherein a synthetic hologram is encoded such that a phase image of each pixel of the hologram is encoded by an offset in the position of one of the diffraction patterns; a heater of the metal layer.

Abstract: An illumination device includes a light source that emits an electromagnetic radiation input beam, a dichroic first mirror that reflects a first output beam and transmits a second output beam, a second mirror positioned to reflect the second output beam, and an absorber for absorbing radiation emitted by the light source. An adjustable support for the dichroic and second mirror is also provided and is adjustable between a first position where the first beam is transmitted and a second position where the second beam is transmitted, with the other beam being directed to the absorber.

Abstract: A light-emitting diode (LED) troffer adopts LED light sources mounted along two lengthwise sides of an LED module that uses a reflecting diffuser and a diffused light exit window to sufficiently average white light emissions from a plurality of LEDs or to properly mix light emissions from white LEDs at correlated color temperature (CCT) of 6,200±300 K with emissions from LEDs having saturated colors for uniform and tunable CCT light outputs having a consistent intensity or color hue within viewing angles. The troffer adopting a retrofittable design enables single person to readily hang and secure the LED module single-ended on top of the troffer for installation, retrofit, and inspection. The troffer uses such an integrated LED module with a power density less than 0.0127 W/cm2, and thus no apparent heat sink is needed.

Abstract: A projector lens of a vehicular headlamp has a shape of a convex lens in which the upper and lower portions are cut by a predetermined amount. A light source is disposed above optical axis Ax of the projector lens while a light emission surface is inclined downwardly. A first reflecting mirror has an elliptical reflective surface, and is adjusted in size such that almost all the light reflected from the reflective surface is incident on the projector lens. A shield plate is disposed in the vicinity of the focus of the first reflecting mirror to form a horizontal cutoff line. A second reflecting mirror is disposed to reflect light that is not incident on the first reflecting mirror. The third reflecting mirror is disposed above the upper end of the shield plate at a position that does not interfere with the light reflected from the first reflecting mirror.

Abstract: Disclosed is a vehicle light fitting unit that can include a plurality of light sources, a reflecting plane which diffusely reflects light emitted from the plurality of light sources, and a lens which emits the light, which is diffusely reflected by the reflecting plane, to a front direction. The plurality of light sources can each be provided so that a pitch between one light source and another light source adjacent to the one light source is shorter than a light path length from the one light source to the lens passing through the reflecting plane.

Abstract: A device and method for providing a laser system utilizing high efficiency lasers emitters and optionally the high quality beam characteristics of a crystal gain medium single mode laser for emitting beamlets and utilizing an optical and mechanical method of forming the beam and directing it to the desired target using both a concave and a partially reflective convex mirror to reflect the beamlets, with the convex mirror transmitting a portion of the beamlets to a transmission medium for emitting the beamlets as a laser beam.

Abstract: There is provided a device arranged to couple with an electromagnetic source. The device comprises an optical metamaterial arranged to increase the intensity of radiation at a predetermined optical wavelength. The optical metamaterial has a periodic reflective component having a dimension no greater than the predetermined wavelength.

Abstract: A light emitting diode (LED) lamp includes a substrate, a plurality of LED elements arranged on the substrate, and a reflector arranged on the substrate. The reflector includes a plurality of reflecting sheets obliquely extending upward from a center of the substrate. A projection of each reflecting sheet covers one LED element. Part of light from the LED element is reflected to a lateral periphery of the substrate by the reflecting sheet.

Abstract: A backlight unit includes: an LED; a chassis including a bottom plate provided on a side opposite to a light exit side; and a first reflection sheet. The first reflection sheet includes a quadrangular bottom portion extending along the bottom plate, and two raised portions raised from each of two adjacent sides of the quadrangular bottom portion toward the light exit side, a joint provided between two adjacent side edges of the raised portions. The side edge of a first one of the raised portions includes a facing portion facing the side edge of a second one of the raised portions in a direction in which the first one of the raised portions is raised from the quadrangular bottom portion, and the first one of the raised portions and facing portion bulge toward the light exit side to have an arched shape.

Abstract: The illumination source has a LED light source (2) generating a first divergent light field (6). The light from the LED light source (2) is processed by a first optical element (10), in particular a first lens element, to generate a second divergent light field (19). The first divergent light field (19) is processed by a second optical element (20) having a variable lens variable focus in order to generate a third light field (35) whose divergence can be varied.

Abstract: A light distribution device includes a light transmissive substrate having first and second opposing faces and a plurality of substantially parallel linear prisms on the second face that extend in a longitudinal direction of the substrate. The light distribution device is configured to connect to a light assembly including a linear light source with the first face of the substrate facing the light source, with the linear prisms substantially parallel to a light source longitudinal axis and with and the substrate having a non-planar cross-sectional shape such that at least a major portion of the substrate is concave relative to the light source. When connected, the light distribution device is configured to receive light from the light source and distribute the light emerging from the second face of the substrate in a batwing distribution pattern in a plane perpendicular to the light source longitudinal axis.

Abstract: A wall notification device described herein can draw a lower current by providing a more efficient reflector configuration. The reflector is designed to be positioned on a wall and provide sufficient light output in each of the requisite directions, as required by the UL 1971 standard. The notification device has a reflector unit having a base having a curved portion centered on the vertical axis and a flat portion extending from the curved portion; a reflective flange extending from a location near a top side of the base; a first and second specular protrusion extending from the curved portion of the base; a third and fourth specular protrusion extending from the base; a fifth and sixth specular protrusion extending from the curved portion of the base; and a sixth and seventh specular protrusion extending form the flat portion of the base.

Abstract: A lighting system comprising a plurality of controllable light emitting elements 3 is disclosed. The lighting system further comprising a spreading optical element 5 arranged in front of the plurality of light emitting elements to shape the light emitted from the lighting elements, and a controller 7 for varying a light emission angle range of light emitted from the spreading optical element 5 by controlling each of the plurality of controllable light emitting elements. This allows the light emitted from the spreading optical element to be varied without varying any physical parts of the lighting system, because the controller now controls each of the light emitting elements, by e.g. dimming one or more of the light emitting elements or by switching one or more of the light emitting elements off.

Abstract: A circuit board (1) for mounting at least one light source (10), comprising a substrate (2) and a plurality of printed electrical conductors (3) printed on the substrate (2), At least one printed electrical conductor (3) comprises a first region (4) for arranging the light sources (10). The circuit board (1) further comprises reflectors (5) which are disposed between the printed electrical conductors (3) adjacent to each other and cover other regions of the printed electrical conductors (3) than the first region (4), wherein the reflectors (5) are insulating reflectors. The circuit board is easy to manufacture, has relatively high reflective property, and can efficiently reflect the light emitted from the light source. Also disclosed are a method for manufacturing the circuit board, and an illumination device comprising the circuit board.

Abstract: A folded circularly symmetric illumination optic comprising a first light transfer mode having a first central refractive surface and a second central refractive surface, wherein one of the first and second central refractive surfaces has at least one peened feature; a second light transfer mode having a first refractive surface, a first TIR surface, a second TIR surface and a second refractive surface; a third light transfer mode having a first refractive surface, a first TIR surface and a second refractive surface, wherein the first TIR surface has at least one peening feature, and wherein the second refractive surface is conical; wherein the first TIR surface and second refractive surface of the second light transfer mode is coincident at least one point, wherein the second refractive surface of the third light transfer mode is coincident with the first TIR surface and second refractive surface of the second light transfer mode.

Abstract: A reflector luminaire with a light-emitting means and a reflector, which reflects light from the light-emitting means which is incident on said reflector in a predetermined emission direction and which has a rim (2) which points towards the emission direction makes it possible to perform particular lighting tasks, for example the uniform illumination of a rectangular illumination area by virtue of the fact that the reflector comprises a plurality of differently designed segments (7), which are calculated individually with respect to the light-emitting means for defined illumination of a predetermined area, and by the fact that the segments (7) are joined to one another by transition sections (8), by means of which the predetermined reflecting total surface area of the segments (7) is reduced by less than ¼.

Abstract: The present disclosure provides systems and techniques for directing light into one or more light beams which converge into an aggregate beam. In certain example embodiments, the present disclosure provides a reflector having one or more reflective curved surfaces for reflecting and focusing light from one or more light emitting diodes (LEDs) into one or more light beams, which make up an aggregate light beam. In certain example embodiments, the reflective curved surfaces are paraboloid surfaces.

Abstract: A lighting fixture employs one or more reverse parabolic reflectors and molded lenses in a faceplate to provide a variety of light output intensities and emission patterns. Some embodiments clip the reverse parabolic reflectors to fit within the outline of the faceplate without sacrificing significant light output.

Abstract: A lava lamp display device comprising: a frame having a permeable vision window at a front surface thereof, and a lamp base and a projection light at a bottom of inner side thereof; a film-coated glass mounted on the vision window; a support bracket having at least one positioning hole thereon; a transparent bottle arranged in the positioning holes; and two reflection mirrors having a center serving as a reference to define the two symmetrical reflection mirrors, and both sides thereof inclined forward to form an angle ? being not parallel with the film-coated glass with 180° angle. After the filler of the transparent bottle is reflected repeatedly by the two reflection mirrors, the vision window shows shapes in an inward serial arrangement in the middle and unlimited extension on both sides, having effects of an illumination lamp device, an art decoration, and special visual in one unit.

Abstract: Embodiments of the present invention provide apparatuses and systems for providing illumination for projectors. One or more beam combiners are used to combine multiple light beams to provide a combined light beam toward to a pupil of an imaging device in a projector. Solid state light sources, such as diode lasers and light-emitting diodes (LEDs), may be used as light sources at relatively low cost and low power, and with long lifetime. In one embodiment, an optical beam combiner comprises a first reflective surface, a second reflective surface, and a transparent region disposed between the first reflector surface and the second reflective surface. In another embodiment, an optical device comprising an array of optical beam combiners is provided. In a further embodiment, light sources comprising a plurality of light-emitting devices mounted on curved surfaces are utilized in conjunction with an optical beam combiner to provide illumination for a projector.

Abstract: A display device for lighting objects comprising: a frame having a vision window at a front side thereof, a film-coated glass mounted on the vision window, a support bracket arranged in the frame and having at least one positioning hole thereon, a lighting object having at least a part thereof arranged in the positioning hole and two pieces of refection mirrors having a center serving as a reference to define the first and second symmetrical reflection mirrors and both sides thereof inclined forward to form an angle between 145° and 175°. After a lighting object is reflected repeatedly by the two or more than two reflection mirrors, the vision window shows shapes in an inward serial arrangement from the middle to unlimited extension at both sides, providing effects of an illumination lamp device, an art decoration, and special visions in one unit.

Abstract: A lamp module includes a cover structure, a circuit board structure and a multichip package structure, and the circuit board structure and the multichip package structure are sequentially assembled on the bottom side of the cover structure. The cover structure includes a cover body, a plurality of positioning elements disposed on the bottom side of the cover body, and a plurality of retaining elements disposed on the bottom side of the cover body. The cover body has a through opening and a surrounding light-reflecting surface formed on the inner surface of the through opening. The circuit board structure is disposed on the bottom side of the cover body and includes a plurality of conductive pins disposed on the bottom side of the circuit board structure. The multichip package structure is disposed on the bottom side of the cover body and electrically connected to the circuit board structure.

Abstract: Disclosed herein are an illumination unit and an illumination system. The illumination unit includes a first reflector, a second reflector, a light source module arranged between the first reflector and the second reflector, and a supporting member for supporting the second reflector. The supporting member includes first and second inclined surfaces arranged adjacent to each other at opposite sides of an inflection point. The supporting member has a distance of 15 to 50 mm between a first horizontal line horizontally passing through the inflection point and a second horizontal line horizontally passing through an end of the first inclined surface or an end of the second inclined surface. The supporting member includes projections having asymmetrical side surfaces opposing each other. The height ratio between the side surfaces of the supporting member is 1:1.01 to 80 or 1.01 to 80:1.

Abstract: An LED lamp is disclosed comprising a remote phosphor patch on or near the interior surface of a translucent sphere. The phosphor is illuminated by an adjacent light box containing blue LEDs, located within the lamp below the transmissive phosphor patch or alternatively above a reflective phosphor patch. The reflective patch can be either fully or partially populated with phosphor. Below the light box is an electronics bay, and below that is an Edison screw-in base.

Abstract: A light deflecting device includes a micro-mirror array and a transparent cover member arranged in front of a micro-mirror array reflective surface. Each of a plurality of mirror elements of the micro-mirror array is selectively switched between a first reflecting position in which the mirror element reflects light such that the reflected light is effectively used as part of a predetermined light distribution pattern, and a second reflecting position in which the mirror element reflects light such that the reflected light is not effectively used. The cover member is configured such that a second angle formed between a mirror element reflective surface when the mirror element is in the second reflecting position and a cover member surface is smaller than a first angle formed between the mirror element reflective surface when the mirror element is in the first reflecting position and the cover member surface.

Abstract: A lighting apparatus is disclosed. The lighting apparatus may be an omni-directional LED lamp. The lighting apparatus may include a heat sink and a first substrate disposed over the heat sink. A second substrate may be mounted to a connector provided on the first substrate. The second substrate may include at least one LED mounted on a surface of the second substrate. The second substrate may be mounted in the connector such that the surface of the second substrate is positioned at a prescribed angle with respect to the upper surface of the first substrate. Various types of reflectors are disclosed that reflect light in a prescribed angular range with uniform intensity. A bulb may be provided over the heat sink to surround the LEDs. Moreover, a power module may be electrically connected to the connector to provide power to the LEDs.

Abstract: A light guide element for controlling light shape includes a light-incident surface, a light-emitting surface, a first reflecting surface, and a second reflecting surface. The light-incident surface includes a first outer peripheral edge and a first inner peripheral edge. The light-emitting surface includes a second outer peripheral edge and a second inner peripheral edge. The first reflecting surface is constructed by a first profile curve, and connects the first and the second outer peripheral edge. The first profile curve is a connecting line of two points respectively on the first outer peripheral edge and the second outer peripheral edge. The second reflecting surface is constructed by a second profile curve, and connects the first and the second inner peripheral edge. The second profile curve is a connecting line of two points respectively on the first inner peripheral edge and the second inner peripheral edge.

Abstract: This disclosure includes light fixtures, some of which include a lower housing that defines a first channel and has first and second ends, where the first end defines an aperture and the second end has a first mounting surface disposed at a non-parallel first angle relative to a plane of the aperture, an upper housing that defines a second channel and has first and second ends, where the second end has a light mount and the first end has a second mounting surface disposed at a non-parallel second angle relative to a plane of the light mount, and a diffuser configured to be coupled between housings, where the upper and lower housings can be coupled at the first and second mounting surfaces such that the light mount is disposed at a non-parallel third angle relative to the plane of the aperture. Some light fixtures have unitary lower and upper housings.

Abstract: A light emitting device comprises: a surface light source for a surface-emission; a CPC lens having a light receiving surface, a side reflective surface, and a light emitting surface, the light receiving surface receiving a part of light from the surface light source, the side reflective surface reflecting the light from the light receiving surface, and the light emitting surface facing the light receiving surface and emitting the light; and a reflector containing the surface light source and the CPC lens, and having a concaved reflective surface for reflecting forward the light deviating the light receiving surface from the surface light source, wherein a ratio of a illumination area of the surface light source to an area of the light receiving surface of the CPC lens is not less than 0.63 and not more than 2.93.

Abstract: An illustrative light fixture providing a desired spot light pattern diameter at a given distance includes a planar light emitter providing a light source and forming a first plane, and concentric conical frustum reflectors, the first reflector having a proximate end coplanar with the first plane and the second reflector having a proximate end distal of the first plane.

Abstract: A lamp structure includes a base, a side-emitting light source, first and second reflecting portions. The base includes a central protrusion portion extending from the base. The side-emitting light source is disposed on a side surface of the central protrusion portion and configured to emit a light beam. The first reflecting portion includes a first reflective curved surface, and a portion of the light beam is reflected thereby and then is directly emitted out. The first reflecting portion is disposed between the central protrusion portion and the second reflecting portion. The second reflecting portion includes a second reflective curved surface adjacent to the first reflective curved surface, and the other portion of the light beam is reflected thereby and then is directly or indirectly emitted out. The first reflective curved surface has a radius of curvature less than that of the second reflective curved surface.

Abstract: A novel LED wall lamp comprising a lamp frame and a base plate for installing electric parts is provided; said lamp frame is fixed on the base plate; a mounting plate is provided in said lamp frame; an LED light source is fixed on the front face of the mounting plate, while the back is provided with heat sinks exposed out of the lamp frame; the four sides of the mounting plate are provided with reflectors. The utility model preserves the contour and mounting means of the traditional wall lamp and dissipates heat generated by the LED light source out of the lamp frame through the heat sinks at intervals.

Abstract: An LED includes a base, an LED chip, a first electrode, a second electrode, an encapsulating layer, and a reflective layer. The base forms a concave recessed from a top face thereof and a recess above the concave. The reflective layer is attached on the concave. The LED chip is received in the recess and located over the reflective layer. The LED chip has a light output face facing towards the reflective layer. The encapsulating layer is filled in the recess to cover the reflective layer and encapsulate the LED chip. The reflective layer includes a first reflective layer and a second reflective layer. The first reflective layer is located at a center of the concave. The second reflective layer surrounds and connects the first reflective layer. The first reflective layer has a curvature smaller than that of the second reflective layer.

Abstract: A specular reflector and LED lamps using embodiments of the reflector are disclosed. Embodiments of the invention provide a reflector for solid state lamps. The reflector can be a specular reflector. The reflector includes a rigid, polymeric substrate and sputtered metal applied to the substrate. In some embodiments, the metal is silver. In some embodiments, the metal is applied without an intervening base coat. In some embodiments, the substrate is made from or includes an aromatic polyester such as polyarylate. The reflector can include a discontinuous or irregular surface yet still exhibit very high overall reflectivity and efficiency because the metal can be applied without an intervening base coat. In some embodiments, the reflector is used in lamps having a retroreflective optical design.

Abstract: A direct troffer-style fixture for solid state light sources and pan structures for use in these fixtures. The fixture comprises a door frame assembly that is attached to the pan. The pan housing is defined by a base and two angled side walls. End caps are attached to the side walls. End reflectors extend at an angle away from the end caps and attach to the base. The end caps, the end reflectors, and the base define compartments at both ends of the housing in which components can be housed. A light board is attached to the base using alignment holes in the base and cutout portions of the end reflectors. The multifunctional end reflectors retain elements within the compartments, provide added structural stability to the pan, aid in aligning a light board, and they reflect light that impinges on them toward the open end of the fixture.

Abstract: A Parabolic-Type reflector has a uniform Apparent Brightness over the reflector surface. A model of the reflector is divided into a plurality of elements arrayed radially around the reflector focus. Each element has a length li measured radially from the focus and perpendicular to an optical axis of the reflector, and an initial depth d-initi measured parallel to the optical axis. For each element, a light-angle ?i is calculated, the angle of light from the light source subtended by the element. An Apparent Brightness is found for each element, ABi??i/li. The element emin with the lowest Apparent Brightness ABmin is identified. For each element other than emin a required light-angle is found, the required light-angle ?-corri=ABmin×li. While maintaining li, the initial depth d-initi of the element is reduced to a corrected depth d-corri necessary to achieve ?-corri.

Abstract: Reflector designs for a large area panel light source create induced draft cooling means adjacent to the panel light source. The panel light source has a wavelength conversion element on a solid-state light source for emitting light of a first and second wavelength to form a broader emission spectrum of light from the panel light source. Magnetic elements make electrical connection between the fixture contacts and the light source contacts on the panel light source for a light fixture.

Abstract: A backlight module includes a reflective bottom surface, a light-exit top surface, and a light source module. The reflective bottom surface has a light-entrance side and the light source module is disposed along the light entrance side. The light-exit top surface is disposed opposite to the reflective bottom surface and sandwiches a mezzanine space with the reflective bottom surface. Light generated from the light source module enters the mezzanine space through the light-entrance side and is reflected by the reflective bottom surface to the light-exit top surface. The reflective bottom surface includes at least one first reflective surface and at least one second reflective surface arranged in intervals along an extending direction of the light-entrance side. A specular reflection ratio of the first reflective surface is greater than the specular reflection ratio of the second reflective surface.

Abstract: Devices (100) comprise light sources (1) for producing light into directional ranges (70) and light blockers (10) for blocking the light in parts (71) of the directional ranges (70). The light blockers (10) have inner sides (11) and outer sides (12), and are made of materials having optical indices. Combinations of shapes of the outer sides (12) and the optical indices will reflect the light in the parts (71) of the directional ranges (70) at the outer sides (12), for example back to the light sources (1). The shapes of the outer sides (12) may be saw tooth shapes, the optical indices may be larger than 1.4, total reflection may take place for the light in the parts (71) of the directional ranges (70) when incoming at angles smaller than 40° with sides (14, 15) of saw teeth (13) of the saw tooth shapes. Shapes of the inner sides (11) may correspond with shapes of light output graphs of the light sources (1) in the parts (71) of the directional ranges (70).

Abstract: In a projection optical system for use in an image projection apparatus illuminating an image display panel forming an image in accordance with a modulating signal with illumination light from a light source, the projection optical system includes first and second optical systems arranged along an optical path defining an upstream-downstream direction in the order described from upstream to downstream on the downstream side of the image display panel. The first optical system includes at least one dioptric system and has positive power. The second optical system includes at least one reflecting surface having power and has positive power. The image formed by the image display panel is formed as an intermediate image in the optical path, and the intermediate image is magnified and projected.