Abstract: A lighting device includes a light emitting module including a substrate and a light emitting device mounted on the substrate; a case body receiving the light emitting module; a gap member contacting the case body and wider than the substrate; a lens on the light emitting module and contacting the gap member; a first ring provided on a peripheral portion of the lens; and a case cover coupled with the case body and having an opening, wherein the case body is provided therein with a coupling cavity in which the gap member is seated, and wherein the lens includes a first portion between the ring and the gap member and a second portion that extends outward from the first portion through the opening of the case cover.

Abstract: A table lamp has a lamp stand, an adjusting arm, a lamp head and an anti-glare lens. The anti-glare lens is mounted on the lamp head and has a body. The body has a bottom, a light entering concave face, a light source region, a total reflection face and a light ejecting convex face. The bottom has a zero axis to divide the bottom equally. The light entering concave face is formed in the body. The light source region is formed in the body. The total reflection face is obliquely formed on and protrudes from the body and is formed with the bottom of the body. An angle between the zero axis and the total reflection face is between 90 and 180 degrees. The light ejecting convex face is formed on the body, is formed with the total reflection face and has at least one curvature.

Abstract: An LED lamp scattering heat swiftly by exchanging currents mainly constructs multiple channels interleaved in heat scattering areas among fin units of a cooling device. At least one first hole is defined on a wall of each channel for assisting the channels in communicating with the heat scattering areas. Accordingly, the exterior air is introduced from the channels into an accommodating chamber of a seat body of the LED lamp. Thence, a fan installed in the LED lamp further blows the exterior air and the wasted heat of the LED unit to cause a current exchanging effect. Whereby, the wasted heat is efficiently expelled from the LED lamp, which increases the heat radiating efficiency and the using life of the LED lamp and remedies restrictions on installations of the LED lamp for expanding the lamp application.

Abstract: A lighting device has multiple light sources each having a primary optics; and a secondary optics for the multiple light sources; such that at the secondary optics the radiation patterns emitted from the multiple light sources have a substantially uniform luminance; and such that the secondary optics transforms the radiation pattern from the multiple light sources into an elliptical spot of light of substantially uniform luminance.

Abstract: A downlight includes: an outer cover; a heatsink; and a light engine located between the outer cover and the heatsink, wherein the light engine is at least partially spherical; the heatsink has a hemispherical inner surface that matches with the spherical portion of the light engine; the outer cover and the heatsink are assembled together by an elastic extension member, thereby making the hemispherical inner surface of the heatsink in contact with the spherical portion of the light engine; the downlight includes a pin provided near the elastic extension member, with one end of the pin fixed to the heatsink and the other end extending through the outer cover. Pressing the end of the pin that extends through the outer cover, the elastic extension member is further extended to separate the heatsink and the light engine so that the illumination angle of the light engine can be adjusted.

Abstract: Disclosed is a light-diffusing resin composition capable of realizing high color rendering properties and brightness when used in light-diffusing sheets, and a light-diffusing sheet and a light source unit using same. Provided are the light-diffusing resin composition including a binder resin (A) preferably in 1 to 80 mass %, a light-diffusing agent (B) preferably in 15 to 95 mass %, and a trimethine cyanine compound (C) represented by formula (I) preferably in 0.0001 to 5 mass %; and the light-diffusing sheet using the light-diffusing resin composition in a light-diffusing layer. The light source unit has the light-diffusing sheet and a light source, preferably a white LED.

Abstract: A light emitting diode (LED) optical system. Implementations may include an LED coupled with a printed circuit board and an optic. The optic may include a first end and a second end opposing the first end. The optic may also include a first optical stage including the first end and a second optical stage including the second end. The first optical stage may include a total internal reflector and a second optical stage includes an upper reflector located at the second end. The optic may be coupled over the LED at the first end. The second optical stage may be configured to emulate a point light source for an outer lens coupled over the LED optical system using light emitted from the LED.

Abstract: A fluorescence-like light emitting diode (LED) illumination unit is provided, which includes a radiator, an LED substrate fixed on the radiator, and multiple LED illuminants encapsulated on the LED substrate. A first surface of the radiator is in the shape of a paraboloid with reflective effect. A bar-shaped convex lens with radial converging effect is disposed in the space surrounded by the paraboloid. The bar-shaped convex lens is located in front of the multiple LED illuminants and radially converges part of light rays emitted by the multiple LED illuminants but axially diffuses them. The illumination unit completely solves the problems such as exposure of spotted light sources, small irradiation angle of a light path, beaded light spots of the LED light sources as the lamp illuminant, visual dizziness caused by multiple projections formed by irradiating an irradiated object with a multi-point light source, dazzling light rays, and the like in an existing LED illumination lamp.

Abstract: Provided is a lens. The lens includes a lens body including a convex top surface having a first recessed part at a central portion thereof and a flat surface at a circumference thereof and a flat bottom surface having a second recessed part at a central portion thereof; and a plurality of lens supports on the bottom surface of the lens body, wherein a ratio of a maximum depth (a) of the first recessed part, from the top surface of the lens body to a bottom surface of the first recessed part, to a maximum thickness (h) of the lens body, from the top surface of the lens body to the bottom surface of the lens body, ranges from 0.06 to 0.1.

Abstract: Lens elements having a generally curved shape with a flat surface mounted adjacent an LED for improving the light transmission efficiency and the dispersal pattern of radiation emitted by the LED are disclosed.

Abstract: An illumination device includes: a first light source; a first beam spread angle changing element; an integrator; and a first small-amplitude oscillation element, in which the integrator is configured of a first fly-eye lens and a second fly-eye lens, optical magnification of an optical system configured of the first beam spread angle changing element and the first and second fly-eye lenses, and a shape of the first small-amplitude oscillation element are determined to allow a size of each light source image formed on the second fly-eye lens by each cell of the first fly-eye lens not to exceed a size of one cell of the second fly-eye lens, an amount of displacement of each light source image by oscillation amplitude of the first small-amplitude oscillation element is determined not to form the light source image over a plurality of cells of the second fly-eye lens.

Abstract: Accessories for LED lamps and methods of attaching accessories to illumination sources (e.g., LED lamps) are disclosed. A beam shaping accessories mechanically affixed to the LED lamp. The lens is designed to adapt to a first fixture that is mechanically attached to the lens. Accessories are designed to have a second fixture for mating to the first fixture such that the first fixture and the second fixture are configured to produce a retaining force between the first accessory and the lens. In some embodiments, the retaining force is a mechanical force that is accomplished by mechanical mating of mechanical fixtures. In other embodiments, the retaining force is a magnetic force and is accomplished by magnetic fixtures configured to have attracting magnetic forces. In some embodiments, the accessory is treated to modulate an emanated light pattern (e.g., a rectangular, or square, or oval, or circular or diffused emanated light pattern).

Abstract: The present invention provides an LED (Light Emitting Diode) illumination unit, an LED illumination device, and an LED illumination system with better visual effect. The LED illumination unit includes: a substrate, having a carrying surface with an x direction as a length direction and a y direction as a width direction and facing a z direction; a plurality of LED chips, supported by the carrying surface of the substrate; a casing, allowing the light emitted from the LED chips to penetrate and covering the LED chips; and a heat dissipation component, having a pair of outside surfaces being planar, and mounted with the substrate and the casing, wherein the pair of outside surfaces is configured opposite and parallel to each other in the y direction at an interval, and is longer than the substrate in the x direction.

Abstract: In the light flux controlling member (5), the angle between an optical path of light output from the light emission center (14) of a light emitting element (4) and optical axis L1 is ?2. Light is incident on the light flux controlling member (5) through an input surface and travels inside the light flux controlling member at an angle ?2 with respect to optical axis L1. Then, light is output from a light control output surface (10) at an angle ?3 with respect to optical axis L1. The input surface (15) and the light control output surface (10) are formed such that, in a range 0<?1??1max, the relationship between ?1 and ?2 is reversed from ?1<?2 to ?1>?2 when ?1 increases, and the relationship between ?1 and ?3 is reversed from ?1<?3 to ?1>?3 when ?1 increases.

Abstract: A light-directing apparatus for off-axial preferential-side distribution of light from a light emitter having an emitter axis. The light-directing apparatus includes a shield member within a lens member positioned over the light emitter. The lens member has an outer surface and an inner surface defining an emitter void and a shield-receiving void which is on a non-preferential side of the lens member. The shield-receiving void is different in configuration than the emitter void. The shield member is in the shield-receiving void in position in the path of light emitted toward the non-preferential side.

Abstract: An LED lamp assembly includes a heat-sink base having insertion notches equiangularly and radially located at a flat inner wall thereof, and a plurality of radiation fins arranged in a radial array, each radiation fin having a plug portion disposed at a top side thereof and respectively inserted into one respective insertion notch of the heat-sink base and fixedly secured thereto using a stamping technique, a lampshade fastened to the radiation fins at the top side, and an insulative connector fastened to the radiation fins at the bottom side.

Abstract: A lighting device includes a light source and an optical element, the light source includes a plurality of light emitting diodes aligned. The optical element being shaped to focus a light beam emitted by the light source in a plane orthogonal to the line of light emitting diodes and to deflect said light beam parallel to an illuminating plane including the line of light emitting diodes so as to form a light beam having an ellipsoidal section.

Abstract: A portable device having within it a multicolor illumination arrangement comprising: a surface; a plurality of light sources, (1a, 1b, 1c, 1d, 1e),at least one of the plurality of light sources being capable of generating two or more emission colors; and drive means (17) for causing the emission color of the at least one light source to vary; whereby the illumination arrangement can produce a varying illumination through at least part of the surface.

Abstract: According to one embodiment, a light-emitting module includes a module substrate, a first wiring pattern provided on the module substrate and including a common wire connecting portion, a second wiring pattern provided on the module substrate and including a first wire connecting portion, a second wire connecting portion, and a middle pattern portion, a first light-emitting element group arranged between the common wire connecting portion and the first wire connecting portion and including semiconductor light-emitting elements connected in series and being electrically connected to the common wire connecting portion and the first wire connecting portion, and a second light-emitting element group arranged between the common wire connecting portion and the second wire connecting portion and including semiconductor light-emitting elements connected in series and being electrically connected to the common wire connecting portion and the second wire connecting portion.

Abstract: Embodiments of a lighting apparatus with a light source using one or more light emitting diodes (LEDs) to generate light. In one embodiment, the lighting apparatus comprises a light diffusing assembly that generates an optical intensity profile consistent with incandescent lamps. The light diffusing assembly comprises an envelope and a reflector element having frusto-conical member and an aperture element disposed therein. The lighting apparatus can also comprise a heat dissipating assembly with a plurality of heat dissipating elements disposed annularly about the envelope. In one example, the heat dissipating elements are spaced apart from the envelope to promote convective heat dissipation.

Abstract: A lighting device is provided to include a plurality of lens bodies. The connecting portion connecting the plurality of lens bodies includes a first major surface and a second major surface opposite to the first major surface. The first major surface is in contact with the lateral portion at a first contact under an outer edge of the leading lens. The second major surface is in contact with the lateral portion at a second contact located below the first contact. The first contact is located outside of a point of intersection along the first major surface with respect to the center of each lens body, the point of intersection at which an extraction of the first major surface intersects with an extension of a ray of the emitted light which is incident on the light incident surface and is projected on the second contact.

Abstract: An LED lighting structure includes a main body and a filling body. The main body has a first side and a second side. The first side has multiple raised sections. The second side has multiple light incidence sections corresponding to the raised sections respectively. At least one recessed channel section is formed on the second side around the light incidence sections. The filling body is disposed in the channel section. The filling body provides waterproof effect to prevent humidity and alien particles from infiltrating into the channel section. Also, multiple main bodies can be quickly serially connected.

Abstract: A light emitting die package includes a substrate, a reflector plate, and a lens. The substrate has traces for connecting an external electrical power source to a light emitting diode (LED) at a mounting pad. The reflector plate is coupled to the substrate and substantially surrounds the mounting pad, and includes a reflective surface to direct light from the LED in a desired direction. The lens is free to move relative to the reflector plate and is capable of being raised or lowered by the encapsulant that wets and adheres to it and is placed at an optimal distance from the LED chip(s). Heat generated by the LED during operation is drawn away from the LED by both the substrate (acting as a bottom heat sink) and the reflector plate (acting as a top heat sink).

Abstract: The present invention includes: a casing having a bottom wall part and a pair of side wall parts extending upward from this bottom wall part; a rod-shaped lens provided above an LED substrate and along a longitudinal direction inside the casing; and a fixing mechanism for fixing the lens to the pair of side wall parts. The fixing mechanism includes: upwardly facing surfaces longitudinally extending along an inner surface of the side wall parts; downwardly facing surfaces longitudinally extending along side peripheral surfaces of the lens; a concave groove longitudinally extending above the upwardly facing surface on the inner surface of each of the side wall parts; and elastic bodies fitting into the concave grooves to be in contact with the side peripheral surfaces of the lens in a state that the downwardly facing surfaces are in contact with the upwardly facing surfaces.

Abstract: When the edge surfaces of the circuit board side cut-out part and the light screen member side cut-out part which are respectively orthogonal to the cutting directions are allowed to abut on each other so as to attach the light screen member to the circuit board, the light screen member is attached to the circuit board so that both the end surfaces of the light screen member opposed to each other in the cutting direction of the light screen member side cut-out part are arranged more inside than both the end faces of the circuit board opposed to each other in the cutting direction of the circuit board side cut-out part.

Abstract: Exemplary embodiments of the present invention relate to an aspherical light emitting diode (LED) lens and a light emitting device including the same. The aspherical LED lens includes a light exit plane concavely depressed near a central axis, a light entrance plane including a conical plane having a vertex located on the central axis, and a plurality of protrusions arranged on a portion of a side surface of the light exit plane. The aspherical LED lens has a radially symmetrical structure with respect to the central axis.

Abstract: A light-emitting diode (LED) and manufacturing method thereof are disclosed. The LED includes a transparent substrate, a plurality of transparent conductive layers, a plurality of metal circuits, and a LED chip. The LED chip is suitable for emitting a light and a portion of the light emits toward the transparent substrate. The manufacturing method of LED includes the following steps. First, a transparent conductive layer is formed on the transparent substrate. Next, a conductive pattern is formed by etching transparent conductive layer. The intersection metal circuit is formed by disposing the metal on a portion of the transparent conductive layer. Finally, the LED chip is disposed on the metal circuit so that the LED chip is electrically connected to the metal circuit.

Abstract: An LED downlight comprises a primary reflector having an upper end and an open lower end, an LED printed circuit board assembly disposed in the upper end of the reflector, an optical assembly positioned beneath the LED printed circuit board assembly, a secondary reflective ring positioned beneath the LED printed circuit board assembly and within the primary reflector housing, the secondary reflector ring supporting the optical assembly and improving light distribution.

Abstract: Projection apparatus for projecting a radiation spot on a working plane includes a plurality of stacks of diode-laser bars. Each stack provides a beam of laser radiation. The diode-laser bars in each stack are arranged one above another in the fast-axis direction of the diode-laser bars. A corresponding plurality of beam-expanders expands the beam from the corresponding diode-laser bar stack in the slow-axis direction of the diode laser bars only. A focusing lens collects the slow-axis expanded beams and projects the slow-axis expanded beams into the working plane to form the radiation spot.

Abstract: A light module includes a light engine that has an LED package having power terminals. A base ring assembly holds the light engine. The base ring assembly has a base ring configured to be mounted to a supporting structure. The base ring has a securing feature. The base ring assembly has a contact holder that holds power contacts. The power contacts are spring biased against the power terminals to create a separable power connection with the power terminals. A top cover assembly is coupled to the base ring. The top cover assembly has a collar surrounding the base ring. The top cover assembly has a securing feature that engages the securing feature of the base ring to couple the collar to the base ring. The collar has a cavity and the optical component is received in the cavity. The optical component is positioned to receive light from the LED package and the optical component is configured to emit the light generated by the LED package.

Abstract: This is directed to a lens for use with a LED light source. The lens can be placed on a top surface of a light fixture to direct light emitted by a LED module at a wide angle relative to the top surface of the fixture. The lens can include an elongated trench in which several LED light sources can be placed in a line such that light emitted within the trench is re-directed by the lens. The lens can include one or more knobs extending over the trench to facilitate diverting emitted light in a more lateral direction, as opposed to vertical direction. In some cases, the lens can be constructed using an extrusion process by which a lens having a constant cross-section allowing for a wide angle radiation pattern is provided.

Abstract: Disclosed is a large-angle LED lens including a main body which has an incident surface on the inner side of the main body and an exit surface on the outer side thereof. The surfaces are provided symmetrically about the central axis of the main body. The incident and exit surfaces are transparent concave and convex surfaces, respectively. The maximum thickness d1 of the main body at the lower part and the minimum thickness d2 thereof at the top satisfy the relation: 4<d1/d2<6; the concave depth h1 of the concave surface and the thickness d2 satisfy the relation: h1>4*d2; and the convex height h2 of the convex surface and the thickness d2 satisfy the relation: h2>5*d2. With the disclosure, the light-emitting angle is increased while maximizing the utilization of the light. A large-angle emission LED light source module is also disclosed herein.

Abstract: A waterproof fairy light has a housing, a socket and a lighting assembly. The housing has an assembling hole defined therein. The socket is mounted in the assembling hole and has a cavity defined through the socket and having an inner surface and a partition formed in the cavity on the inner surface, dividing the cavity into two spaces and having two opposite side edges formed integrally on the inner surface of the cavity so that no gap is formed between each side edge and the inner surface. The lighting assembly is mounted in the cavity of the socket and has a lighting element and two contacting pins. The integrally formed partition prevents rain from contacting both the contacting pins and causing short circuit.

Abstract: Apparatus and methods of attaching accessories to LED lamps and for providing active accessories in LED lamps are disclosed.

Abstract: LED light bulbs include openings in base or cover portions, and optional forced flow elements, for convective cooling. Thermally conductive optically transmissive material may be used for cooling, optionally including fins. A LED light engine may be fabricated from a substrate via planar fabrication techiques and shaped to form a substantially rigid upright support structure. Mechanical, electrical, and thermal connections may be made between a LED light engine and a LED light bulb.

Abstract: Certain example embodiments relate to lighting system covers that include AR-coated textured glass, and/or methods of making the same. In certain example embodiments, at least one light source is provided proximate to a cover comprising a glass substrate. The glass substrate includes an anti-reflective (AR) coating on the surface that is closer to the at least one light source, and the glass substrate is textured (e.g., such that it is substantially prismatic in texture) on the surface opposite the AR-coated surface. The surface of the glass substrate on which the AR coating is formed may be a flat, irregular, or textured matte. An optional AR coating also may be formed on the textured surface of the glass substrate.

Abstract: There is provided a lighting device which emits light with an efficacy of at least 60 lumens per watt. The lighting device comprises at least one solid state light emitter, e.g., one or more light emitting diodes, and optionally further includes one or more lumiphor. In some embodiments, the output light is of a brightness of at least 300 lumens. In some embodiments, the output light has a CRI Ra of at least 90. Also, a method of lighting, comprising supplying electricity to a lighting device which emits light with an efficacy of at least 60 lumens per watt.

Abstract: An LED underwater lamp comprises a housing (1) and an LED lamp body (2), wherein the housing (1) is fixed in a mounting hole of a mounting plate (20), an opening is provided at one end of the housing (1), the LED lamp body (2) is inserted through the opening and fastened within the housing (1), an inner water-proof sealing ring (3) is disposed between the LED lamp body (2) and the opening of the housing (1), an LED bulb (4) is disposed within the LED lamp body (1) situated at the opening of the housing (1), and a power line (5) extending to outside through the housing (1) is detachably connected to the other end of the LED lamp body (2).

Abstract: One embodiment provides light along an optical axis. It comprises a substrate and at least one array of multiple LED chips without individual packaging supported by the substrate. The LED chips emit light within different wavelength ranges and are distributed laterally with respect to the axis over an area, the LED chips having light emitting surfaces for emitting light in directions transverse to the area. An optical element adjacent to the light emitting surfaces of the LED chips in the at least one array collects and directs light emitted by the LED chips of the at least one array along the axis towards a target. Another embodiment is directed to a method for providing multiple wavelength light for fluorescent microscopy using the above system. Electric current is supplied to the multiple LED chips, causing them to emit light of multiple wavelengths.

Abstract: This invention relates to a secondary optics for the multi-chip LED. It features in that the optics consists of a refraction collimating portion, two total internal reflection (TIR) portions, an emitting surface with a micro lens array, an edge flange and a snap lug for lens assembly. The refraction collimating portion is located on the centre of the lens bottom, which has a convex aspheric surface. Around the refraction collimating portion outwards, there are two rounds of TIR prisms, featured in that at least one TIR prism has a flake polyhedral reflection surface. On top of the secondary optics, there is the emitting surface constituted with the micro lens array. The edge flange and the snap lug for lens positioning represent non operational portion and may have any shape. Related to the present invention, the LED used therewith may be a multi-chip or single-chip LED.

Abstract: A secondary optical lens is invented for use in LED wall wash lights. The secondary optical lens includes a concave body that has an outer surface that extends from a base plane to a top plane, the so-called outer surface is comprised with a diamond-texture flake reflection pattern. Furthermore, the secondary optical lens includes a light incidence surface extending upward from the base plane of the concave body, the so-called light incidence surface includes a cylindrical plane of incidence and an aspheric plane of incidence on top of the cylindrical plane of incidence. And there is a light emitting surface at the top plane of the concave body having a sinusoidal waveform stripe-texture.

Abstract: An organic light emitting element includes an organic light emitting diode formed on a substrate, coupled to a transistor including a gate, a source and a drain and including a first electrode, an organic thin film layer and a second electrode; a photo diode formed on the substrate and having a semiconductor layer including a high-concentration P doping region, a low-concentration P doping region, an intrinsic region and a high-concentration N doping region; and a controller that controls luminance of light emitted from the organic light emitting diode, to a constant level by controlling a voltage applied to the first electrode and the second electrode according to the voltage outputted from the photo diode.

Abstract: A vehicle lamp unit has a light emitting device disposed adjacent to a base point on an optical axis extending in a front-rear direction of a vehicle on which the vehicle lamp unit is mounted, and a transparent member disposed in front of the light emitting device. The light emitting device has a light emitting surface arranged to face forward. The transparent member is configured such that light emitted by the light emitting device enters the transparent member and is internally reflected by a front surface of the transparent member, and such that the light reflected by the front surface is internally reflected again by a rear surface of the transparent member and emitted from the front surface of the transparent member. The front surface has a flat surface facing obliquely upward.

Abstract: An LED lamp A1 includes a plurality of LED modules 1 and a substrate 2 on which the LED modules 1 are mounted in a row. A light guide 3 covering the LED modules 1 is provided on the substrate 2. The light guide 3 is held in close contact with each of the LED modules. With this arrangement, a proper amount of light is obtained with the use of a smaller number of LED modules 1 or with less power consumption.

Abstract: A lighting arrangement comprises an optical apparatus (4) with a radiation outlet surface (41) and an optoelectronic component (2) for producing radiation, with an element (3) which is formed like a reflector being formed. The shape and arrangement of the element are suitable for deflecting radiation generated in the component through the radiation outlet surface, and the element is designed to specifically absorb this radiation. The lighting arrangement is preferably intended for particularly homogeneous back-lighting of display apparatuses such as liquid crystal displays (LCDs).

Abstract: Embodiments described herein provide optical systems that can mix colors to produce illumination patterns having a large area with uniform color. One embodiment of an optical system can include a set of optical units that each produces an illumination pattern with uniform color and intensity. The optical units are spaced so that the individual illumination patterns overlap to create an overall illumination pattern with an overlap area. In the overlap area, the colors emitted by the individual optical units mix to create a desired color. Embodiments of optical systems can provide beam control so that the optical units emit a high percentage of light in beam.

Abstract: A lighting system utilizing light-emitting diodes (LEDs) and methods for configuring lanterns thereof are disclosed. The lantern includes a roof or canopy that includes fans that span directly between the electronics and LEDs for improved heat dissipation, the fans preferably formed integral with the canopy. The LEDs are mounted on easily mounted and removed modular printed circuit boards, in at least two different sizes and numbers of LEDs, and optical lenses of at least two different lighting patterns are provided, so that the lantern may be assembled or retrofit according to a desired application including candlepower and lighting pattern for cast light. The optical lenses are individually provided, utilize refraction to diminish reflection, and, in one form, incorporate an integral reflector to assist in defining a lighting pattern. In some forms, a securement may be provided for individual securement of lenses with the PCB.

Abstract: A luminaire includes a light fixture having an opening, at least one LED positioned within the light fixture to emit light through the opening, and a fan configured to cool said at least one LED.

Abstract: A light emitting apparatus includes a housing having a transparent portion, at least one LED positioned within the housing to emit light through the transparent portion, and a fan positioned within the housing to cool said at least one LED.

Abstract: An illuminating device including a lampshade, a capper, a light source circuit board and a power circuit board is provided. The lampshade has a top surface and an accommodating space, the capper is telescoped on the lampshade, and the top surface of the lampshade is located in the capper. The light source circuit board is disposed at the top surface, having a first inductance coil. The power circuit board is disposed in the accommodating space, having a second inductance coil, wherein the first inductance coil and the second inductance coil are disposed adjacent to each other and spaced apart by a distance. In the illuminating device, power of the power circuit board is generated by induced current from the first inductance coil and the second inductance coil and provided to the light source circuit board for light-emitting.