Abstract: An electronic package module includes a circuit board having a supporting surface, at least one first electronic component, at least one second electronic component, and at least one molding compound. The first and second electronic components are mounted on the supporting surface. The molding compound is disposed on the supporting surface and covers the supporting surface partially. The molding compound encapsulates the first electronic component yet not the second electronic component.

Abstract: An improved low cost and highly consistent inductive apparatus. In one embodiment, the low cost and highly consistent inductive apparatus addresses concerns with so called conductive anodic filament (CAF) that occurs within these laminate structures by incorporating surface mountable chip chokes in the underlying circuit design, These conditions that result in undesirable CAF include high humidity, high bias voltage (i.e. a large voltage differential), high-moisture content, surface and resin ionic impurities, glass to resin bond weakness and exposure to high assembly temperatures that can occur, for example, during lead free solder bonding application. Methods of manufacturing and using the aforementioned substrate inductive devices are also disclosed.

Abstract: There is provided a mobile terminal a case having a hollow portion provided therein, a circuit board positioned in the hollow portion of the case to mount electronic components therein, the circuit board including a securing hole, a side button having an exposed front side at a lateral side of the case, a reinforcing frame positioned between the side button and the circuit board, the reinforcing frame being coupled to a lateral portion of the circuit board by a securing hook that projects from a backside of the reinforcing frame, the securing hook being received in the securing hole and a switch module coupled to a front side of the reinforcing frame so as to be located between the reinforcing frame and the side button, the switch module being configured to generate an electric signal when the side button is pressed.

Abstract: A startup apparatus for a power supply includes an enclosure base, an enclosure cover slidably and pivotably mounted on the enclosure base, a trigger member slidably mounted in the enclosure base, and a power supply switch installed in the enclosure base. The enclosure cover is pushed forward relative to the enclosure base to trigger the trigger member to cause the power supply switch to output power-on instructions to a circuit board in the enclosure base. The enclosure cover is pushed backward relative to the enclosure base to trigger the trigger member to cause the power supply switch to output power-off instructions to the circuit board.

Abstract: An assembled component and a method for assembling a component are disclosed. In one embodiment the assembled component includes a component carrier, an attachment layer disposed on the component carrier and a component disposed on the attachment layer, the component having a nano-structured first main surface facing the component carrier.

Abstract: Disclosed herein is a method of forming a solder resist (SR) post, including: (A) forming an SR layer on a printed circuit board; (B) disposing a patterning film on an upper surface on the SR layer; (C) forming a plurality of openings in the patterning film or the SR layer; (D) filling SR ink in the openings and performing an exposure process to form a plurality of SR posts; (E) delaminating the patterning film; (F) removing an uncured portion of the SR ink on which the exposure process is performed; and (G) drying the plurality of SR posts.

Abstract: A new packaging method for a wide range of MEMS for application on both the wafer and device scale. Titanium is used as the packaging material and both silicon and titanium MEMS devices are integrated on to a titanium substrate. A Nd:YAG pulsed laser is used to micro-weld the titanium cap to the substrate. A three-dimensional time dependent model of heat flow during laser beam welding is presented. The heat transfer and parametric design capabilities of COMSOL were employed for this purpose. Model calculations are compared and calibrated with experimental results of pulsed laser welds. The functionality and hermiticity of the proposed packaging was evaluated by packaging a self actuated Veeco Instrument AFM cantilever tip. The experimental measurements show that the resonance frequency and quality factor of the device stay the same before and after packaging and the applied technique has no effect on the device.

Abstract: A wireless module includes a first board (11) on which a mounting component of a wireless circuit is mounted, and a second board (12) which is laminated on the first board (11). The first board (11) and the second board (12) are electrically connected together by a connecting member (18) such as a Cu core ball. Laterally to the connecting member (18), a conductive member (23) for impedance adjustment is provided at a position at a predetermined distance from the connecting member (18), such that the signal path of the connecting member (18) has predetermined impedance.

Abstract: A plurality of suspension boards and an inspection substrate are integrally supported by a support frame. In each suspension board, a line is formed on a conductive first support substrate via a first insulating layer. The first support substrate and the line are electrically connected by a first via in the first insulating layer. In the inspection substrate, a conductor layer is formed on a conductive second support substrate with a second insulating layer sandwiched therebetween. The second support substrate and the conductor layer are electrically connected by a second via in the second insulating layer. The first via and the second via have the same configuration.

Abstract: Embodiments of the present invention disclose a backplane, a cabinet-level communication device, and a method for replacing a backplane, related to the field of mobile communication technologies, and can greatly reduce difficulty in replacing a backplane while ensuring stability of a connection between the backplane and a front board or a rear board. The backplane includes: a base plate of a stripe structure; one or more first connectors arranged on a first face of the base plate and configured to connect a corresponding connector on a front board; and one or more second connectors arranged on a second face of the base plate opposite to the first face and configured to connect a corresponding connector on a rear board.

Abstract: In accordance with embodiments of the present disclosure, a backplane for electrically coupling modular information handling resources to one or more other information handling resources, may include a printed circuit board, a first plurality of slots, and a second plurality of slots. The printed circuit board may have a first surface and a second surface opposite the first surface. The first plurality of slots may be mounted to the first surface and the second plurality of slots may be mounted to the second surface, such that each of the second plurality of slots are offset from an adjacent slot of the first plurality of slots in a direction parallel to a plane defined by the first surface and each of the second plurality of slots are rotated approximately 180 degrees from an adjacent slot of the first plurality of slots.

Abstract: A method of fabricating the body of the portable electronic device as well as the resulting portable electronic device and its body are provided to facilitate the transmission of radio frequency signals through the body of the portable electronic device. In the context of a method, at least one aperture and, in some instances, a plurality of apertures are defined by laser perforation through a conductive portion of the body of the portable electronic device. The method may also anodize the conductive portion including at least partially filling the at least one aperture with an anodization layer. As such, the conductive portion of the body of the portable electronic device has a relatively consistent, metallic appearance, even though laser perforation apertures are defined therein for supporting the transmission of radio frequency signals.

Abstract: A mounting bracket assembly for an electrical cable having a Faraday shield configured to allow at least one conductor passing through the assembly to a fire detector wherein the Faraday shield electrically terminates into the receiving end of the assembly without the need for additional electrical connections.

Abstract: Various apparatus and associated methods involve a light source that provides light at wavelengths that substantially correlate to local maxima in the spectral sensitivity of a diurnal avian. In an illustrative example, the light source may output light primarily in wavelength bands that are not substantially absorbed by colored oil droplets and/or visual pigment in at least one type of cone in the eye of a diurnal avian. In some embodiments, the light source may include a light-emitting diode (LED) light source. Exemplary light sources may output spectral components to illuminate diurnal avians with local maxima of intensity at wavelengths that substantially correspond to local maxima in a spectral sensitivity visual response characteristic of the diurnal avians.

Abstract: There is provided a light-guide, compact collimating optical device, including a light-guide having a light-waves entrance surface, a light-waves exit surface and a plurality of external surfaces, a light-waves reflecting surface carried by the light-guide at one of the external surfaces, two retardation plates carried by light-guides on a portion of the external surfaces, a light-waves polarizing beamsplitter disposed at an angle to one of the light-waves entrance or exit surfaces, and a light-waves collimating component covering a portion of one of the retardation plates. A system including the optical device and a substrate, is also provided.

Abstract: A protective cover includes a light guide plate, a first flexible layer, a light masking layer and a light source. The light guide plate has a light scattering structure, an upper surface and a lower surface opposite to the upper surface, wherein the light scattering structure is formed in the light guide plate and adjacent to the lower surface. The first flexible layer is formed on the upper surface. The light masking layer is formed on the first flexible layer and has a light transmissible portion formed over the light scattering structure correspondingly. The light source is disposed neighboring to the light guide plate and light emitted by the light source is guided by the light guide plate and then emitted out of the light transmissible portion.

Abstract: A control panel including a cover which is provided with at least one tactile pressure detection zone forming a control button, in which a force sensor is arranged between the cover and a support, behind the detection zone, in which a spacer made of elastically compressible material is mounted between the force sensor and the cover so as to take up the mechanical plays between the force sensor and the cover, characterized by the fact that the spacer is at least partially translucent and by the fact that the control panel includes at least one main light source and a light collector which permits injection of the light produced by the said main light source into the thickness of the spacer so that the spacer produces a backlighting beam directed towards a zone to be illuminated of the detection zone.

Abstract: The light emitting part is obtained by depositing fluorescent materials on a metal plate with a predetermined shape to form a fluorescent material film. The fluorescent material emits light upon irradiation with a laser beam.

Abstract: A method for manufacturing a phosphor device may include: providing an optical transmitting member having a first end face and a second end face, whereby the optical transmitting member is designed for guiding exciting light entering through the first end face onto a phosphor layer arranged on the second end face, whereby at least a part of the exciting light is being wavelength-converted by the phosphor layer, and whereby the optical transmitting member is further designed for at least partially collecting and guiding the light converted by the phosphor layer; attaching an optically transparent electrode on the second end face of the optical transmitting member; providing a phosphor and a counter-electrode designed for electrophoretic deposition of the phosphor; and depositing a phosphor layer on the optically transparent electrode by means of electrophoretic deposition, thereby using the optically transparent electrode as a coating electrode.

Abstract: Modulated light sources are described. A modulated light source may have first light sources that are configured to emit first light, which has first color components that occupy a range that is beyond one or more prescribed ranges of light wavelengths. The modulated light source may also have a light converter that is configured to be illuminated by the first light. The light converter converts the first light into second light. The second light has one or more second color components that are within the one or more prescribed ranges of light wavelengths. Strengths of the one or more second color components in the second light are monitored and regulated to produce a particular point within a specific color gamut.

Abstract: A safety aroma-diffusing night lamp assembly includes a body holding a coupling socket at the top, a lamp bulb inserted into the coupling socket and electrically connected to the body, a lampshade defining a bottom coupling hole coupled to the coupling socket and a top opening for holding an aroma capsule, and an aroma capsule including a disposable heat-transfer container mounted in the top opening of the lampshade and a solid aromatic substance contained in the disposable heat-transfer container and heatable by the radiating heat energy of the lamp bulb to release an aromatic smell.

Abstract: An illuminated device comprising a housing, a light source within the housing, and at least one of a water stream element and a flame element supported within the housing. Some embodiments of the housing can have one or more walls, an upper portion, an opening through the upper portion thereof, and a plurality of stone pieces covering the at least one wall and upper portion of the housing. The stones can be at least partially translucent such that the light emitted from the light source is visible through the stones. Each light source is configured to emit a light toward at least the one or more walls. The water stream element is configured to project a stream of water through the opening in the upper portion of the housing, and the flame element is configured to project a flame through the opening in the upper portion of the housing.

Abstract: Methods and apparatus provide for a display device comprising a plurality of display panels arranged adjacent to one another along the respective peripheral edges thereof, and wherein respective first and second viewing planes form an obtuse angle T relative to each other. The display device further includes a cover sheet located in proximity to, and covering the first and second viewing planes, and includes a light compensation portion located proximate to the peripheral edges of the first and second flat panel displays, and has a curvature complementary to the obtuse angle between the respective first and second viewing planes. The light compensation portion bends light produced by respective peripheral areas of the first and second flat panel displays proximate to the respective peripheral edges thereof to reduce visual discontinuities introduced by the peripheral edges into an image displayed on the first and second flat panel displays.

Abstract: Disclosed are a backlight unit and a display apparatus using the same. The backlight unit includes first and second reflectors, a light source module, an optical member spaced apart from the second reflector, a first cover to come into contact with the second reflector and optical member, a second cover coupled to the first cover to support the light source module, and a third cover coupled to the first and second covers. The first cover includes a bottom plate, first lateral plates facing each other with respect to a first direction, second lateral plates facing each other in a second direction, a first coupling portion disposed at each first lateral plate and coupled to the second cover, a second coupling portion disposed at each second lateral plate and coupled to the optical member, and a third coupling portion disposed at each second lateral plate and coupled to the third cover.

Abstract: A backlight module is provided, including a first light-emitting device and a second light-emitting device. The first light-emitting device includes a first blue light LED chip and a first phosphor layer having a first color spectrum, wherein the first color spectrum has a first color spectrum area with at least 70% thereof distributed within the range from 500 nm to 580 nm. The second light-emitting device includes a second blue light LED chip and a second phosphor layer having a second color spectrum, wherein the second color spectrum has a second color spectrum area with at least 60% thereof distributed within the range from 600 nm to 680 nm. The first color spectrum has a portion within the range from 590 nm to 780 nm, and the portion has a first area smaller than or equal to 10% of the second color spectrum area.

Abstract: A piezoelectric generator utilizes to accept a force for generating electric energy and comprises a flexible material and a piezoelectric element set. The piezoelectric element is positioned in the flexible material. The piezoelectric element set is formed by the plurality of piezoelectric elements connected in series, each piezoelectric element comprises a piezoelectric material and a metal sheet. The piezoelectric material has piezoelectricity. When the piezoelectric material suffers a stress, the piezoelectric material will generate a voltage by the deformation. The flexible material has a first elasticity coefficient. The piezoelectric element set has a second elasticity coefficient. The second elasticity coefficient is larger than the first elasticity coefficient.

Abstract: A stackable LED flare and system for use at night, in low light conditions or during the day where a lighted flare provides greater visibility. The flare comprises a multi-sided housing with a panel on each side and having a top and a base. It has a plurality of LEDs aligned in windows positioned in at least one of the panels. The flare includes a re-chargeable battery encased in the housing for powering the flare and a circuit for delivering power and operational control from the battery to the LEDs upon activation by a switch. A set of contacts positioned on the outside of the housing deliver a charge to the battery. The contacts are configured to allow multiple flares to be stacked and charged simultaneously. The system also includes a charging station that accommodates a stack of two or more flares during the charging operation.

Abstract: A light energy reuse type light-emitting device with low power consumption is provided by converting light from a light-emitting device into electric power efficiently for reuse. Also, a light energy reuse type light-emitting device with high yield is provided. A light-blocking film of the light-emitting device is replaced to a photoelectric conversion element, so that light is converted into electric power. That is, conventionally, light is not emitted in a portion of a light-blocking film. In the disclosed invention, light which is not emitted can be converted into electric power by a photoelectric conversion element, and can be reused. Therefore, a light-emitting device with low power consumption is realized.

Abstract: A light for use in a light fixture includes a light source adapted to produce light in an area including the light and a connector configured for connection to the fixture. The light further includes a communication apparatus configured to generate one or more signals indicative of a presence of a person in the area, and a controller that is operative to control the light source in a normal mode in response to the one or more signals.

Abstract: This disclosure relates to suspended linear lighting fixtures that are arranged to accept lighting elements. Lighting fixtures according to the present disclosure comprise at least one body and at least one suspension mechanism. These lighting fixtures can be arranged such that electrical and mechanical connections can be provided at various locations along their length, rather than only at the distal ends of the fixtures. The fixtures can also comprise various connectivity features that allow further arrangements, designs and spatial adjustments. Lighting systems utilizing these fixtures are also disclosed.

Abstract: The present disclosure provides a spotlight having a clamp that can be affixed to objects. Advantageously, the spotlight can be used portably, or affixed to an object for hands-free use. The head of the spotlight can pivot, and also rotate fully, to provide a variety of lighting angles. The body of the spotlight can include a battery compartment that is sealed to satisfy applicable waterproofing standards.

Abstract: The present disclosure provides a worklight having a handle with a clamp integrated therein, so that the worklight can be affixed to an object for hands free mode, or used portably. The worklight has a head that pivots and rotates with respect to the handle, so that it can be placed in a variety of positions. The worklight can be battery powered or powered by an external power source.

Abstract: This disclosure relates to lighting fixtures, such as suspended lighting fixtures. Devices according to the present disclosure provide lighting fixtures capable of emitting in one or more primary directions, while simultaneously emitting in a direction toward a mount surface, reducing undesirable areas of insufficient light and more efficiently illuminating a space. Lighting fixtures disclosed herein can achieve this increase in illumination efficiency in many ways, including utilizing various lighting element arrangements, such as dual-sided lighting elements, and various lens arrangements, such as lens shape affecting the direction of emitted light.

Abstract: A straight tube luminaire, detachably attached between one pair of opposed rotary sockets, includes one pair of connection terminals electrically connected to each of the pair of rotary sockets within a predetermined rotational range of the rotary sockets, one pair of straight tube illumination sockets electrically connected to the connection terminals and electrically connected to electrodes provided at both ends of a rectilinear fluorescent lamp, and a reflective plate extended between the pair of straight tube illumination sockets and attached to the straight tube illumination sockets to reflect light of the fluorescent lamp. The reflective plate and the straight tube illumination sockets are rotated as one body together with the connection terminals by inserting the connection terminals into the rotary sockets and rotating the rotary sockets.

Abstract: This disclosure relates to retrofit systems and methods for lighting installations, and in particular, to retrofit systems and methods used to retrofit troffer-style lighting installations with LED light sources. Retrofit systems can be used with different light fixtures, but those described are particularly adapted for use with troffer-style fixtures. These retrofit systems can provide the same amount of light as traditional light fixtures already do, for example 1600-4000 lumens or more. The retrofit systems can be used with many different light sources but are particularly well-suited for use with solid state light sources or light engines, such as those utilizing LEDs. Some embodiments of the present invention comprise a mechanical mounting system for installing an LED light engine within an existing lighting system housing or pan, such as a troffer pan, without penetrating the ceiling plenum.

Abstract: This disclosure relates to light engines for use in lighting fixtures, such as troffer-style lighting fixtures. Light engines according to the present disclosure have integrated features that eliminate the need for additional components such as a Printed Circuit Board (PCB), a heat sink, a cover portion, a lens and/or a reflective element. Devices according to this disclosure can comprise a rigid body, conductive elements arranged into electrical pathways and light sources such as light emitting diodes (LEDs). Devices according to this disclosure can further comprise integrated cover, lens and/or reflective element features. Methods for the manufacture of such devices are also disclosed.

Abstract: This disclosure relates to light engines for use in lighting fixtures, such as troffer-style lighting fixtures. Light engines according to the present disclosure have integrated features that eliminate the need for additional components such as a Printed Circuit Board (PCB), a heat sink, a cover portion, a lens and/or a reflective element. Devices according to this disclosure can comprise a rigid body, conductive elements arranged into electrical pathways and light sources such as light emitting diodes (LEDs). Devices according to this disclosure can further comprise integrated cover, lens and/or reflective element features. Methods for the manufacture of such devices are also disclosed.

Abstract: A method and apparatus for an illumination system includes a linear metal heat sink with at least a first planar surface and a second planar surface. The first planar surface is positioned substantially nonplanar with the second planar surface, and at least a portion of the linear metal heat sink is designed for exposure to free air. A first plurality of light emitting diodes is attached on the first planar surface, and a second plurality of light emitting diodes is attached on the second planar surface.

Abstract: Retrofit systems and methods are disclosed for lighting installations, and in particular, to retrofit systems and methods used to retrofit troffer-style lighting installations with LED light sources. Retrofit systems can be used with different light fixtures, but those described are particularly adapted for use with troffer-style fixtures. These retrofit systems can provide the same amount of light as traditional light fixtures already do, for example 1600-4000 lumens or more. The retrofit systems can be used with many different light sources but are particularly well-suited for use with solid state light sources or light engines, such as those utilizing LEDs. Some embodiments of the present invention comprise a mechanical mounting system for installing an LED light engine within an existing lighting system housing or pan, such as a troffer pan, without penetrating the ceiling plenum.

Abstract: A white light source employing a III-nitride based laser diode pumping one or more phosphors. The III-nitride laser diode emits light in a first wavelength range that is down-converted to light in a second wavelength range by the phosphors, wherein the light in the first wavelength range is combined with the light in the second wavelength range to create highly directional white light. The light in the first wavelength range comprises ultraviolet, violet, blue and/or green light, while the light in the second wavelength range comprises green, yellow and/or red light.

Abstract: A portable device having within it a multicolour illumination arrangement comprising: a surface; a plurality of light sources, at least one of the plurality of light sources being capable of generating two or more emission colours; and drive means for causing the emission colour 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: Provided are an illumination device and a light fixture including the illumination device. The illumination device includes a body formed of a thermally-conductive material that includes a planar heat transfer surface and a fastener that is compatible with a base that couples the body to the light fixture. A substrate formed, at least in part from a dielectric material supports an array of light emitting diodes and a plurality of contacts electrically connected to the light emitting diodes. A thermally-conductive planar surface is provided to the dielectric material of the substrate to be placed in thermal communication with the heat transfer surface and conduct heat generated by the light emitting diodes to the body.

Abstract: Provided are an illumination device and a light fixture including the illumination device. The illumination device includes a body formed of a thermally-conductive material that includes a planar heat transfer surface and a fastener that is compatible with a base that couples the body to the light fixture. A substrate formed, at least in part from a dielectric material supports an array of light emitting diodes and a plurality of contacts electrically connected to the light emitting diodes. A thermally-conductive planar surface is provided to the dielectric material of the substrate to be placed in thermal communication with the heat transfer surface and conduct heat generated by the light emitting diodes to the body.

Abstract: The invention specifies a radiation-emitting apparatus (10) having a separating optics system (3) which is arranged downstream of a first radiation-emitting region (1a) and a second radiation-emitting region (1b) in the emission direction and which is suitable for separating radiation (11) which is emitted from the first radiation-emitting region (1a) and radiation (12) which is emitted from the second radiation-emitting region (1b) from one another. A secondary optics system (4) is arranged downstream of the separating optics system (3), wherein the radiation (11) which is emitted from the first radiation-emitting region (1a) is associated with a first region (4a) of the secondary optics system (4) and the radiation (12) which is emitted from the second radiation-emitting region (1b) is associated with a second region (4b) of the secondary optics system (4) which is separate from the first region (4a). The invention also specifies uses for an apparatus (10) of this kind.

Abstract: A light module includes one or more LEDs coupled to a circuit board, a lens disposed over at least one LED, and an adhesive layer disposed between each LED and the lens. A flange extends from at least one side of the lens. The adhesive layer fixes the lens in an optical alignment over the corresponding LED. The adhesive layer includes at least one of a non-permeable layer with an adhesive material on the top and bottom surfaces, a gas-permeable layer with an adhesive material on the top and bottom surfaces, a deposited material, and an over mold material. An alignment tool including one or more optical recesses and one or more alignment features is used in the assembly of at least one of an optical assembly and a light module that includes the optical assembly. The alignment tool facilitates precise alignment of the lenses over the LEDs.

Abstract: A lens for distribution of light from a light emitter having an emitter axis. The lens includes an inner surface defining an inner cavity and including a substantially cross-sectionally convex inner region along an open end of the inner cavity and a substantially cross-sectionally linear inner region joining the substantially cross-sectionally convex inner region and extending therefrom toward the emitter axis. The convex region is configured for refracting emitter light rays toward the emitter axis. The lens further includes an outer surface receiving the light from each of the inner regions. A lens flange surrounds the lens and has an outer flange surface extending radially outwardly from the lens outer surface at positions axially spaced from the light emitter. The convex inner region is configured to refract emitter light to the outer surface such that the outer flange surface is substantially free from receiving any emitter light.

Abstract: A LED cooling structure includes a substrate having a circuit layout and one or a number of thermally conductive plates arranged on the top wall thereof, one or a plurality of through holes cut through the opposing top and bottom walls thereof and a thermally conductive post mounted in each through hole and connected with the thermally conductive plates, and one or a number of light-emitting devices mounted at the substrate and electrically connected to the circuit layout with the bottom side thereof kept in contact with one respective thermally conductive plate for quick dissipation of heat.

Abstract: Techniques and architecture are disclosed for providing a modular lighting system/luminaire having an integrated heat sink assembly. In some cases, the system/luminaire may comprise a plurality of individual modular light sources which have been operatively coupled with one another. In some instances, a modular light source may include one or more light engines (e.g., light emitting diodes or LEDs) which have been operatively coupled with an individual heat sink module. When assembled, the plurality of heat sink modules may define, in the aggregate, a plurality of heat conduits which dissipate thermal energy from the light engines by convective heat transfer. Also, in some cases, the heat sink modules may be electrically isolated from one another, allowing for the heat sink assembly itself, in part or in whole, to function as part of the desired circuit.

Abstract: A process of manufacturing an LED lamp strip includes the steps of forming a plurality of through holes on an adhesive tape, mounting the adhesive tape to a top side of a scrollable lead frame, bonding a plurality of LED chips to the top side of the scrollable lead frame according to the positions of the through holes, packaging the LED chips respectively, and finally cutting the scrollable lead frame. In light of this, the LED lamp strip can be produced under the circumstances of low production cost and less production time.

Abstract: A rotatable bulb with single side illumination is disclosed, which includes a plastic housing 65; the plastic housing 65 in combination with a top portion of the lamp is made rotatably with reference to its lamp base 50. The plastic housing 65 has an axis tube 653 at bottom end; a spring metal 61 is configured on the axis tube 653 at an end; the spring metal 61 is electrically, elastically coupled against the metal screw 52 from inside.