Abstract: The invention provides a light generating device (1000) comprising:—a light source (100) comprising a light emitting surface (110), wherein the light source (100) is configured to generate light source light (101), wherein the light emitting surface (110) is configured in a light chamber (200);—the light chamber (200), wherein the light chamber (200) is at least partly defined by a chamber wall (210), wherein the chamber wall (210) comprises: (i) a first part (211), wherein the first part (211) is transmissive for the light source light (101), wherein the first part (211) has a first reflectance R1 for the light source light (101), and wherein the first part (211) has a first part area (A1); and (ii) one or more second parts (212), wherein each second part (212) is transmissive for the light source light (101), has a second reflectance R2 for the light source light (101), and wherein the one or more second parts (212) together have a second part area (A2), wherein R1?R2?20%, wherein 65%?R1<100%, and wherei

Abstract: A direct type backlight device includes a lower chassis, a reflective sheet disposed on a bottom portion of the lower chassis, and a plurality of light emitting diode (LED) bars disposed on an upper surface of the reflective sheet. Each of the plurality of LED bars includes a bar-shaped printed circuit board disposed on the upper surface of the reflective sheet, a plurality of LEDs disposed on an upper surface of the printed circuit board, and a reflective member provided on the upper surface of the printed circuit board. A reflectance of the reflective member is at least 90% of a reflectance of the reflective sheet.

Abstract: A light source device includes a casing including one end surface, other end surface, and one side surface between the one end surface and the other end surface, a light emitting unit provided on a side of the one end surface in the casing, a heat radiating unit provided in the casing and thermally connected to the light emitting unit, an exhaust port formed at least in a region located in one side surface and facing the heat radiating unit, an axial fan which is provided in the casing and supplies cooling air to the heat radiating unit, and a shielding deflecting plate which is provided between the axial fan and the heat radiating unit and shields a part of the cooling air supplied from the axial fan and deflects a part of the cooling air to a direction away from the exhaust port.

Abstract: A backlight module and a liquid crystal display are provided. The backlight module has a substrate, a plurality of soldering pads, and a reflective pattern layer. The soldering pads are distributed on the substrate and each of the soldering pads has a soldering pad size. The reflective pattern layer covers the soldering pads and the substrate. The reflective pattern layer has openings, positions of the openings correspond to positions of the soldering pads, each of the openings has an opening size, and the opening size is smaller than the corresponding soldering pad size. The backlight module is provided with the openings in the reflective pattern corresponding to the positions of the soldering pads, and the opening size of the openings is smaller than the soldering pad size of the soldering pads, thereby increasing a ratio of the reflective pattern layer to the substrate. Therefore, brightness is improved.

Abstract: A system and method of assembling a light engine includes determining a desired light output profile for the light engine, selecting a reflector based on the desired light output profile, and selecting one of a first light board and a second light board. The first light board includes a different number of light emitting diodes than the second light board. Each of the first light board and the second light board are capable of providing the desired output light profile when they are coupled with the selected reflector. The method also includes positioning the one of the first light board and the second light board within the housing, adjacent the reflector.

Abstract: A backlight unit comprises a light emitting unit having a plurality of light emitting elements, a light conversion sheet having a plurality of light conversion patterns disposed at positions corresponding to the plurality of light emitting elements, and a phosphor film disposed on the light conversion sheet and including a partition wall dividing a light emitting surface into a plurality of sub-blocks and phosphor layers respectively disposed on the plurality of sub-blocks.

Abstract: For small, high-resolution, light-emitting diode (LED) displays, such as for a near-eye display in an artificial-reality headset, LEDs are spaced closely together. A backplane can be used to drive an array of LEDs in an LED display. A plurality of interconnects electrically couple the backplane with the array of LEDs. The backplane can have a different coefficient of thermal expansion (CTE) than the array of LEDs. During bonding of the backplane to the array of LEDs, CTE mismatch can cause misalignment of bonding sites. The higher the bonding temperature, the greater the misalignment of bonding sites. Lower temperature bonding, using materials with lower melting or bonding temperatures, can be used to mitigate misalignment during bonding so that interconnects can be more closely spaced, which can allow LEDs to be more closely spaced, to enable a higher-resolution display.

Abstract: A light source module having a light emitting surface is provided. The light source module includes at least one substrate, at least one circuit layer, and at least one light emitting element. The at least one circuit layer is disposed on at least one surface of the at least one substrate, and the at least one circuit layer includes at least one circuit. An orthogonal projection of the at least one circuit onto the light emitting surface forms a circuit region, and a coverage rate of the circuit region on the light emitting surface is less than 50%. The at least one light emitting element is disposed on the at least one surface of the at least one substrate and is connected to the at least one circuit layer. In addition, a touch device having the light source module is also provided.

Abstract: A light-emitting module includes a light-emitting element unit including a light-emitting element, a light-transmissive member covering a main light-emitting surface of the light-emitting element, and a first light-reflective member covering lateral surfaces of the light-emitting element; a light-transmissive light-guiding plate having a first main surface and a second main surface having a recess accommodating the light-emitting element unit; a second light-reflective member covering the second main surface and the light-emitting element unit; and a light-transmissive bonding member disposed in contact with inner lateral surfaces of the recess and outer lateral surfaces of the light-emitting element unit. At least a portion of the first light-reflective member is located outside the recess in a cross-sectional view, and is in contact with the light-transmissive bonding member.

Abstract: A diffusion sheet includes a first base film, a second base film, and a shielding layer placed between the first base film and the second base film. In this case, the shielding layer includes an air gap and a pattern.

Abstract: A light-emitting device includes: a base member that includes conductor wirings; a light-emitting element that is mounted on the base member and emits first light; a wavelength conversion member that is disposed on or above an upper surface of the light-emitting element and is adapted to absorb at least part of the first light and emit second light with a wavelength longer than a wavelength of the first light; a light-reflective film that is disposed on an upper surface of the wavelength conversion member; and an encapsulating member that covers the light-emitting element, the wavelength conversion member, and the light-reflective film. A ratio (H/W) of a height (H) to a width (W) of the encapsulating member is smaller than 0.5.

Abstract: A light emitting diode unit including a blue light emitting diode package disposed on a substrate and configured to emit blue light to the outside, a red light emitting diode package disposed on the substrate and configured to emit red light to the outside, and a green light emitting diode package disposed on the substrate and configured to emit green light to the outside, in which each of the blue light emitting diode package, the red light emitting diode package, and the green light emitting diode package includes a wall to prevent light from being emitted to the sides thereof.

Abstract: A radiation-emitting semiconductor device and a fabric are disclosed. In an embodiment, a radiation-emitting semiconductor device includes a semiconductor layer sequence having an active region configured to generate radiation and at least one carrier on which the semiconductor layer sequence is arranged, wherein the at least one carrier has at least one anchoring structure on a carrier underside facing away from the semiconductor layer sequence, wherein the at least one anchoring structure includes electrical contact points for making electrical contact with the semiconductor layer sequence, and wherein the at least one anchoring structure is configured to receive at least one thread for fastening the semiconductor device to a fabric and for electrical contacting the at least one thread.

Abstract: A micro light emitting diode display panel including a plurality of pixels and a control element is provided. One of the pixels include a first sub-pixel. The first sub-pixel includes two micro light emitting diodes having different light wavelengths and controlled independently. The control element controls driving currents to the two micro light emitting diodes according to a gray level of the first sub-pixel, wherein a ratio of the driving current of the micro light emitting diode with larger light wavelength to the driving current of the micro light emitting diode with smaller light wavelength increases as the gray level of the first sub-pixel increases. A driving method of the micro light emitting diode display panel is also provided.

Abstract: A luminaire can include a housing having at least one outer surface that forms a cavity. The luminaire can also include an aperture that traverses the at least one outer surface of the housing. The luminaire can further include a substrate disposed within the cavity. The luminaire can also include an electrical connector disposed on the substrate adjacent to the aperture. The luminaire can further include a dial coupled to the electrical connector, where dial has a range of positions, where each position within the range of positions of the dial corresponds to a discrete correlated color temperature (CCT) output by multiple light sources of the luminaire.

Abstract: A method of manufacturing a display device includes preparing a plurality of light-emitting element packages on a substrate, preparing a first solution including first semiconductor nanocrystals, applying a voltage to a part of the plurality of light-emitting element packages to transport the first semiconductor nanocrystals to a region overlapped with the part of the plurality of light-emitting element packages, and forming a first color conversion layer with the first semiconductor nanocrystals.

Abstract: The disclosure relates to light modules using light emitting diodes (LEDs) and more particularly to LED based light modules for existing sign boxes. One embodiment of a light module according to the present invention can comprise an elongated support structure having a plurality of surfaces. A plurality of light units can be included wherein at least some of the lighting units comprise a first light unit array on one of the support structure surfaces, and others of the said light units comprise a second light unit array on another one of the support structure surfaces. Conductors are arranged to connect the first light array in a series interconnection and to connect the second light array in a respective series interconnection.

Abstract: A vehicle interior illumination system includes: a master control unit; slave control units configured to perform multiplex communication with the master control unit and control a light source mounted on a vehicle in accordance with an instruction of the master control unit; a multiplex communication line configured to connect the master control unit to the slave control units; and a wireless control unit that is connected to the multiplex communication line and configured to perform wireless communication with an external device. The wireless control unit is configured to receive setting information on vehicle interior illumination from the external device and transmit the setting information to the master control unit via the multiplex communication line. The master control unit is configured to transmit a control instruction to the slave control unit to control the light source in accordance with the setting information.

Abstract: A lighting device assembly includes a light source and an optic attached to a first heat sink member, a second heat sink member connected in thermal communication with the first heat sink member, and an aperture member connected to the second heat sink member. The aperture member has an inner surface having steps surrounding a light exit opening to reduce a thickness dimension. The edge of the light exit opening is angled radially outward toward its light exit side. A third heat sink member is connected in thermal communication with the second heat sink member, and has a plurality of openings to receive one or more plaster materials. The third heat sink member has a first region and a second region at least partially surrounding the first region, the second region has a reduced heat conduction capability relative to the first region, to inhibit a transfer of heat to the outer perimeter of the body of the further heat sink member.

Abstract: Various embodiments of an integrated circuit package and a method of forming such package are disclosed. The integrated circuit package includes first and second active dies. Each of the first and second active dies includes a top contact disposed on the top surface of the die and a bottom contact disposed on a bottom surface of the die. The package further includes a via die having first and second vias that each extends between a top contact disposed on a top surface of the via die and a bottom contact disposed on a bottom surface of the via die, where the bottom contact of the first active die is electrically connected to the bottom contact of the first via of the via die and the bottom contact of the second active die is electrically connected to the bottom contact of the second via of the via die.

Abstract: A radiation-emitting semiconductor device and a fabric are disclosed. In an embodiment, a radiation-emitting semiconductor device includes a semiconductor layer sequence having an active region configured to generate radiation and at least one carrier on which the semiconductor layer sequence is arranged, wherein the at least one carrier has at least one anchoring structure on a carrier underside facing away from the semiconductor layer sequence, wherein the at least one anchoring structure includes electrical contact points for making electrical contact with the semiconductor layer sequence, and wherein the at least one anchoring structure is configured to receive at least one thread for fastening the semiconductor device to a fabric and for electrical contacting the at least one thread.

Abstract: An optical device includes: a plurality of walls including at least a first wall and a second wall, wherein the plurality of walls are concentrically disposed around a first axis so as to be multi-stepped along the first axis, wherein each of the plurality of walls expands outward in a sector shape around the first axis at a predetermined central angle ? and includes an outer circumferential surface, a reflective curved surface at the outer circumferential surface, a first side end portion, and a second side end portion; a first reflective surface meeting the first side end portions of the walls; and a second reflective surface meeting the second side end portions of the walls. The first reflective surface and the second reflective surface meet each other on the first axis.

Abstract: An illumination apparatus comprises an array of micro-LEDs, an aligned plurality of directional catadioptric optical elements, light redirecting micro-optics and a reflective polariser. The directional illumination apparatus is arranged to provide a uniform spatial distribution across its output area by recirculating reflected high luminous intensity regions into low luminous intensity regions of the catadioptric optical element. A thin and efficient illumination apparatus with high spatial uniformity may be provided for illumination in environmental lighting, display backlighting or direct display.

Abstract: The present application discloses a direct-type panel lamp with uniform light, including a frame, a diffusion plate, a back plate, a reflective sheet and at least one lamp strip. A central region of the back plate bulges to form a chamber for accommodating the lamp strip. The chamber includes a flat bottom wall and inclined side walls. Each lamp strip is fixed on the bottom wall. The reflective sheet is located in the chamber and attached to the back plate. The reflective sheet is provided with cut-outs, and two side edges of each cut-out are attached to each other to adapt to a corner of the back plate. The cut-outs may prevent the folded edge from wrinkling or folding at the corners of the side walls, so that the reflective sheet is smoothly installed, avoiding causing light spots.

Abstract: A device management system includes a device connection portion connectable to an electric device and a movable connection portion configured to move the electric device along a duct rail provided on a ceiling of a store. The device management system includes: a connection unit attachable to the duct rail; and a management server including a control unit configured to output control information indicating an instruction of moving the connection unit along the duct rail. The control information includes a condition of detection information detected by a position detection sensor. The management unit outputs the control information in a case in which the detection information detected by the position detection sensor satisfies the condition.

Abstract: An apparatus can include a lens that can shape light emerging from a light emitting diode (LED). The emergent light from the LED can be substantially centered around an LED axis. An incident surface of the lens can be positioned to face the LED. The incident surface can include a concave portion. The concave portion can be substantially smooth, so as not to substantially scatter light that strikes the concave portion. The concave portion can be substantially centered around a concave portion axis that is non-coaxial with the LED axis. The incident surface can include a scattering portion, positioned away from the concave portion, which can be textured so as to scatter light that strikes the scattering portion. An exiting surface of the lens can optionally include a generally planar portion that at least partially surrounds a substantially smooth convex portion.

Abstract: A modular acoustic baffle fixture comprising a plurality of acoustic sound absorbing panels forming at least part of the structure of the fixture in which the acoustic sound absorbing panels are mechanically and releasably affixed to an internal support structure and which absorbs sound directed to the void formed therewithin. An LED panel and LED driver may be provided and retained by an internal support structure to project light from the fixture.

Abstract: An optoelectronic component, having an optoelectronic semiconductor chip, includes a substrate, wherein at least two light-emitting sections are arranged laterally next to one another over an upper side of the substrate, the light-emitting sections are separately controllable, the light-emitting sections generate electromagnetic radiation from different spectral ranges, the light-emitting sections are formed by a layer sequence, an active region is formed inside the layer sequence, trenches are formed between the light-emitting sections, and the trenches fully divide the active region so that the light-emitting sections are separated from one another.

Abstract: A modular lighting assembly uses LED banks as the light sources. The assembly allows the power supply and LED banks to be independently replaced. The assembly uses a power supply that is separated from the LED banks and electrically connected to the LED banks with a plug connector that may be unplugged and plugged back in to allow the power supply or LED bank to be independently and readily replaced. The assembly provides for easy replacement of the different components of the assembly. One feature that makes the components easier to replace is that the light modules and/or the power supply may be carried by the housing that is removable from the base mount that is secured to a mounting structure such as a wall or ceiling.

Abstract: The present invention relates to a light emitting strip (10), comprising: an elongate body (12); at least one light source (16) adapted to emit light into the elongate body; and a gap (24) in the elongate body, which gap is arranged in front of the at least one light source, wherein the gap is adapted to omnidirectionally distribute, in a plane (26) perpendicular to a longitudinal direction of the light emitting strip, light emitted by the at least one light source. The present invention also relates to a method of manufacturing a light emitting strip (10).

Abstract: An illumination appliance includes an illumination device, a controller, and a wiring system. The illumination device includes a plurality of interconnected hollow struts, a plurality of semi-reflective sheets, and a plurality of banks of light emitting devices (LEDs). The plurality of interconnected hollow struts collectively define a polygonal body such as a cube with openings. The plurality of interconnected hollow struts individually have an inward facing surface. The plurality of semi-reflective sheets close the openings to define an enclosure within the polygonal body. The plurality of banks of LEDs are mounted on the inward facing surfaces. Some of the light emitted by the LEDs is internally reflected and some is transmitted by the semi-reflective sheets. The controller is for controlling operation of the banks of LEDs. The wiring system electrically couples the controller to the LEDs and routes through the hollow struts to individually connect to the banks of LEDs.

Abstract: A backlight module includes: a light guide plate; a plurality of light sources, arranged on a side edge of the light guide plate and spaced apart from each other along a width direction of the light guide plate; a light homogenizer, arranged on the light guide plate; a flexible circuit board, partially arranged on a region of the light guide plate uncovered by the light homogenizer, and a reservation gap defined between the flexible circuit board and the light homogenizer; a light-shielding layer, arranged in a non-display region of the backlight module and including a plurality of first and second light-shielding portions. The first light-shielding portions are arranged on regions corresponding to the light sources. The second light-shielding portions are arranged on regions corresponding to gaps between every two adjacent light sources. A thickness of the first light-shielding portions is greater than that of the second light-shielding portions.

Abstract: A drive unit changes an irradiation direction of irradiation light from a light-emitting portion. A setting unit sets the irradiation direction of the irradiation light from the light-emitting portion. A control unit controls the drive unit. Depending on a cause of which the irradiation direction of the irradiation light from the light-emitting portion changes from the irradiation direction that is set by the setting unit, the control unit changes responsiveness of the drive unit that changes the irradiation direction of the irradiation light from the light-emitting portion into the irradiation direction that is set by the setting unit.

Abstract: An illustrative light fixture provides an emitter housing and a driver housing in a single fixture with an airflow channel defined between the emitter and driver housings. The airflow channel minimizes thermal conduction between the emitter and driver housings, and maximizes thermal convective cooling for at least one of the emitter housing and driver housing. The emitter housing includes vertical fins extending into the airflow chamber. The left and right sides of the emitter and driver housings define top and bottom edges that are respectively coplanar with the top and bottom edges of the vertical fins.

Abstract: Flexible lighting panel includes a substrate with a conductor pattern and apertures, solid-state light emitters electrically connected to the conductor pattern, a light-transmissive first protective layer covering at least a portion of a first surface of the substrate, and a second protective layer covering at least a portion of a second surface of the substrate. The first and second protective layers are joined to one another through the apertures and the periphery of the substrate to assist in maintaining the light-transmissive first protective layer and the second protective layer against the first and second surfaces of the substrate, respectively. One or both of the first and second protective layers encapsulate the solid-state light emitters. The lighting panel is flexible to allow opposite edges of the lighting panel to be folded over on one another and/or the lighting panel to be rolled into a tubular configuration.

Abstract: In one aspect, a lens comprises a light receiving side comprising grooves for receiving light emitting diodes, the grooves defined by refractive walls. The lens also comprises a light extraction side opposite the light receiving side, the light extraction side comprising refractive extraction surfaces diverging light from a central axis of the lens. In some embodiments, the refractive walls of the grooves work in conjunction with the refractive extraction surfaces to diverge light from the central axis of the lens. In some embodiments, luminaire comprises an array of light emitting diodes; and the lens positioned over the array of light emitting diodes.

Abstract: A lamp includes a housing, a heat sink, a light source and at least a bracket. The heat sink is disposed within the housing. The light source is connected with the heat sink. The bracket is disposed within the housing, and the bracket includes a main body and a first fixing portion arranged along the outer edge of the main body. The main body of the bracket connected to a side surface of the heat sink is connected to the housing through the first fixing portion to dispose the heat sink in the housing. When the bracket is fixedly connected to the inner wall of the housing, the heat sink can be firmly installed inside the housing and it is not easy to loosen during use, so that the heat sink can continuously and stably dissipate for the lamp.

Abstract: A light source device includes: a substrate; a light source on the substrate, the light source emitting light in a direction away from the substrate; an optical element covering the light source on an opposite side of the light source from the substrate to control distribution of the light emitted by the light source; and a light absorption member that absorbs light, wherein the optical element has a bottom face on a substrate side thereof and a light-exiting face on an opposite side of the bottom face from the substrate, the optical element transmits the light emitted by the light source so that the transmitted light exits the optical element through the light-exiting face, and the light absorption member is disposed between the substrate and the bottom face.

Abstract: A liquid crystal display and a driving method thereof are provided. The liquid crystal display includes a backlight source, a lower substrate at a light exit side of the backlight source, an upper substrate opposite to the lower substrate, and a liquid crystal layer between the two substrates. The backlight source includes a plurality of light sources, and light emitted from each light source is collimated light. The liquid crystal display further includes at least one first electrode and at least one second electrode between the lower substrate and the liquid crystal layer and a light shielding structure, orthographic projections of the light source and the light shielding structure on the lower substrate overlapping. The first and second electrodes are configured to receive different voltages to form an electric field, so that liquid crystal molecules within the electric field are deflected to form convex lens structures.

Abstract: A luminaire includes a housing with a cavity, a non-planar lens, and a light emitter. The non-planar lens is coupled to the housing. The lens defines a generally circular footprint and a concavo-convex shape. The light emitter is positioned proximate an edge of the cavity and is configured to emit light into an edge of the lens and toward a center of the cavity.

Abstract: A lighting fixture including a light source including an array of light emitting diodes (LEDs) and a reflector including a input end adjacent the array of LEDs and an output end opposite the input end such that the light source emits light through the reflector from the input end through the output end. The reflector further includes a first, a second, a third, and a fourth sidewall that extend from the input end to the output end. The first and the second sidewalls each include an interior surface, the third and the fourth sidewalls each include an interior surface having a reflectivity that is more diffuse than the interior surfaces of the first and second sidewalls. A lens is adjacent the output end of the reflector.

Abstract: The present invention relates to an LED lighting apparatus with uniform-emitting performance on a wall structure, including: a power part (10) for supplying a power source; a light source part (20) having an LED (21), a PCB (23) for mounting the LED (21) thereon, and a lens (25) located on bottom of the LED (21); an acrylic structure (30) spaced apart from the lens 25 by a given distance to pass the light emitted from the LED (21) therethrough; a fixing part (40) for fixing the power part (10), the light source part (20), and the acrylic structure (30); an aluminum body case (50) for covering the light source part (20); an aluminum fixing case (60) coupled to the aluminum body case (50) in such a manner as to be fastened to the wall structure; and a column (70) for supporting the aluminum fixing case (60) and the fixing part (40).

Abstract: The embodiments of the invention provide a lens and a manufacturing method thereof, a backlight panel and a display device, which improve the collimation of the light beam emitted from the light source and improve the utilization ratio of light energy. The lens includes: a light exit surface; a first light entrance surface opposite to the light exit surface; a second light entrance surface surrounding the first light entrance surface and located on a side of the first light entrance surface facing away from the light exit surface; and a bowl-shaped free curved surface surrounding the second light entrance surface and opposite to the light exit surface. The light exit surface, the first light entrance surface, the second light entrance surface and the bowl-shaped free curved surface enclose the lens.

Abstract: A backlight module is provided, including: a light source module configured to emit a plurality of point lights; a diffuser plate configured to homogenize light emitted from the light source module; and a reflective plate disposed over the light source module and located between the light source module and the diffuser plate, where the reflective plate is provided with a plurality of through holes corresponding to the plurality of point lights, such that the plurality of point lights emitted from the light source module enter the diffuser plate through the corresponding through holes of the reflective plate.

Abstract: A head-mounted display includes an optical component. The optical component includes a plurality of micro lenses and a central lens. The micro lenses are connected to each other. The central lens is connected among and surrounded by the micro lenses. The central lens and the micro lenses are substantially arranged along a plane.

Abstract: A rotor for an electric machine includes a rotor core having at least one internal cavity. A pair of features are defined by the rotor core and extend into the cavity. A structural element is compressed between the features so that a preload may be established between the features and the structural element.

Abstract: A luminaire assembly comprises a first luminaire structure and a second luminaire structure, each configured for positioning in an illuminatable position on an enclosure surface. Each of the first and second luminaire structures comprises a housing structure and an illumination structure extending outwardly from the housing structure. The illumination structure has at least one outer surface region which terminates at a longitudinal distal end region and at least one lateral edge region, wherein the respective lateral edge regions of the first and second luminaire structures are alignable to form an aligning interface therebetween.

Abstract: An image display device includes a drive circuit substrate, micro LED elements, and a wavelength conversion layer that converts excitation light emitted from the micro LED elements and that emits converted long-wavelength light to a side opposite to the drive circuit substrate, the micro LED elements and the wavelength conversion layer being sequentially stacked on the drive circuit substrate. The micro LED elements include a first multilayer film that reflects the long-wavelength light converted by the wavelength conversion layer.

Abstract: Lighting device embodiments having a housing enclosing one or more interior volumes, a metal core printed circuit board, a multilayer stack of spacers, and a serviceable port in the housing to allow venting of one or more of the interior volumes are disclosed.

Abstract: A fan mount includes a first part movable relative to a second part. A retainer is connected to the second part of the fan mount above the first part for restricting the movement of the fan relative to the fan mount. The first part may be a ball member having a depending portion with an hourglass shape. A safety connector may be provided, and a retainer connected to the second part of the fan mount for retaining the safety connector. A cover may also be provided for mounting to the second part, the cover including a central opening for receiving the support. A trim piece is adapted for telescoping within the opening of the cover.