Abstract: Embodiments of an end-cap with retractable and rotatable pin for an LED tube are described. In one aspect, an end-cap for an LED tube may include an end-cap housing, an end-cap base assembly, a power-pin assembly, and at least one elastic component. The power-pin assembly may include at least one power pin thereon and configured to connect to an external power source. The power-pin assembly may protrude out of a center opening of the end-cap housing. The end-cap base assembly may have at least one power connector one end of which is connected to the body of the LED tube to receive electric power. The at least one elastic components may reside inside the end-cap housing and is placed between the power-pin assembly and the end-cap base assembly. The power connector may connect to the at least one power pin when the at least one elastic component is pressed.

Abstract: An LED lighting device includes at least one LED light source emitting light, at least one rechargeable battery for supplying power when external power is not available, at least one electrical connector for connecting the rechargeable battery to external power source for recharging, and at least one control mechanism for switching the operation mode of the device. By setting the operation mode via the control mechanism, the LED light device can be used for more than one intended purposes such as regular lighting, emergency lighting, and flashlight.

Abstract: Embodiments of an end-cap for an LED tube are described. In one aspect, an end-cap for an LED tube may include an end-cap housing, at least one elastic component, and a connecting assembly. The end-cap housing may include at least one power pin thereon and configured to connect to an external power source. The elastic component may reside inside the end-cap housing. The end-cap housing may connect to a first end of the connecting assembly via an extendable connection and a second end of the connecting assembly opposite to the first end thereof connects to a body of the LED tube through at least one power connector. The power connector may connect to the at least one power pin when the elastic component is pressed. The power connector may remain separate from the at least one power pin when the elastic component is not pressed.

Abstract: An add-on smart controller for an LED lighting device includes a power input port, a power output port, a housing, a control unit in the housing, and at least one control signal receiver in the control unit. A power input of the control unit is connected to the power input port. A power output of the control unit is connected to the power output port. The control signal receiver is configured to receive external control signals. The control unit is configured to activate the power output port to supply output voltage responsive to the control unit receiving an ON signal. The control unit is configured to deactivate the power output port responsive to the control unit receiving an OFF signal.

Abstract: Embodiments of a plug-and-play control module for a LED lighting device are described. In one aspect, a plug-and-play control module for a LED lighting device includes a main body and a control module socket. The control module socket includes an AC socket and a DC socket. The main body includes a housing, a control unit, an input port and an output port. The control unit resides inside the housing. A portion of the input port and a portion of the output port protrude outside the housing and connect to the control module socket. The control unit controls an output current flowing through the output socket and thus the on/off of the LED lighting device.

Abstract: The fiberscope for inspecting and cleaning a fiber connector simultaneously includes a housing with a front panel, a microscope system, a connector holder mounted at a distance from the front panel for receiving a connector ferrule of a fiber connector, and a translation stage for moving the microscope system transversely to align its optical axis with the connector ferrule. The fiberscope further includes a hand knob attached to a fine screw through the connector holder for adjusting the vertical position of the connector ferrule, a mirror pivotally mounted between the connector holder and the front panel, an LED lamp, air nozzles attached to the front panel, and a cleaning air tube for supplying compressed air to the air nozzles. The cleaning air from the air nozzles spray sideways onto the fiber endfaces so that the cleaning air bounces off sideways to avoid secondary contamination.

Abstract: A linear light-emitting diode (LED) tube lamp having a readily retrofittable modular structure enables consumers or manufacturers to readily retrofit the lamp by replacing an LED module or internal electronic control units that include an LED driver in maintenance or lamp upgrade without hazards. The readily retrofittable modular structure includes a core assembly in each of lamp bases for easily securing or removing the electronic control unit through a mechanical securing means, and two sets of connection modules for quickly connecting and disconnecting the electronic control unit with the LED module. The readily retrofittable modular structure may use one bi-pin or two bi-pins to connect to the AC mains via pluggable wire for delivering power to the LEDs. Thus, the LLT lamp using the readily retrofittable modular structure may be configured as single-ended, double-ended, or double-ended with double shock-protection switches and can be cost-effectively retrofitted after initial installation.

Abstract: A fitting tip of fiber-optic connector endface inspection microscope for inspecting angled connector endfaces includes a relay lens fixed inside its internal channel and is designed such that when it is received in an intended connector adapter and mounted to the inspection microscope, the normal line to the connector endface forms an acute angle ? with the optical axis of the relay lens; the ray exiting from the relay lens and conjugate to the ray along the normal line is aligned with the optical axis of the inspection microscope; and as a result the connector endface is imaged on an imaging plane within the focusing adjustment range of the inspection microscope. The best image of the connector endface is obtained when the angle ? is half of the inclined angle of the angled connector endface.

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

Abstract: A linear light-emitting diode (LED)-based solid-state lamp using a novel voltage sensing and control mechanism operates normally in both single-ended and double-ended luminaire fixtures. The voltage sensing and control mechanisms automatically detect supply source configuration in the fixture and make proper management so that the linear LED lamp works in any fixtures without operational uncertainty or risk of fire. When used with shock protection switches on the two lamp bases at two opposite ends, the universal lamp fully protects a person from possible electric shock during initial installation and re-lamping.

Abstract: A linear light-emitting diode (LED)-based solid-state universal lamp using a degenerate voltage sensing and control mechanism operates normally in both single-ended and double-ended linear tube lamp fixtures. The degenerate voltage sensing and control mechanism automatically detects power source configuration in the fixture and makes proper management so that the universal lamp works in any fixtures without operational uncertainty or risk of fire. When used with shock protection switches in the two lamp bases at two opposite ends, the universal lamp fully protects a person from possible electric shock during initial installation and re-lamping.

Abstract: A linear light-emitting diode (LED)-based solid-state lamp having an electrically insulating heat sink that comprises a honeycomb structure is used to replace a conventional metallic one for efficiently dissipating the heat generated by operating the lamp. The lamp further built with a pair of shock protection switches can operate free of electric shock hazard.

Abstract: A light-emitting diode (LED)-based solid-state device comprises a color mixing mechanism to dynamically change the correlated color temperature (CCT) of a white light. With different lumen proportions for white phosphor-coated LEDs and integrated red and green LEDs, the light mixtures can be located in any one of eight CCT quadrangles. In practice, CCTs of a white-light can be tuned in a continuous manner. Because all the possible light mixtures on the chromaticity diagram correspond to a line segment that overlays the Planckian locus within the eight CCT tolerance quadrangles, the effect of LED intensity fluctuations that may put the mixture out of white light region is reduced. Also, because the two additional LEDs that mix with the white phosphor-coated LEDs contribute to the overall spectral power distribution (SPD) that substantially matches the SPD of standard illuminants, a CRI of 80 can be reached.

Abstract: A linear light-emitting diode (LED)-based solid-state lamp having a double safety mechanism that comprises at least three shock protection switches, fully protects a person from possible electric shock during re-lamping or maintenance. One protection switch provided at each end of the lamp is able to cut off power when the associated end of the lamp is not inserted into the lamp socket. A third protection switch can be used to turn off the power from the AC main for additional shock protection.

Abstract: A linear light-emitting diode (LED)-based solid-state device comprising a curved surface to hold a flexible printed circuit board with multiple linear arrays of surface mount LEDs provides lighting applications with a broad viewing angle over 180° along the radial direction. On each of the two lamp bases of the lamp, a shock-protection switch is mounted to prevent shock hazard during re-lamping.

Abstract: A linear light-emitting diode (LED)-based solid-state device comprising at least two shock protection switches, at least one each at the two ends of the device, fully protects a person from possible electric shock during re-lamping with LED lamps.

Abstract: A device for shifting the imaging axis of a microscope across the endfaces of a multi-fiber connector for inspecting the endfaces comprises: a supporting body attached to the optical tube of a microscope and having an extended portion; a swinging lever mounted at one end to the extended portion of the supporting body and rotatable on an axis perpendicular to the imaging axis of the microscope; a connection piece connecting between the swinging lever and a fitting tip; a bevel wheel fastened to the supporting body; and a torsion spring for pushing the swinging lever against a slanted surface of the bevel wheel. The bevel wheel is adapted to swing the swinging lever relative to the supporting body so that the imaging axis of the microscope is moved relative to the fitting tip to selectively align the imaging axis across the endfaces for inspection.

Abstract: A portable apparatus for inspecting and cleaning fiber optic connectors which comprises a housing, an adapting tip receptacle on a top side of the housing, an optical module embedded in the housing, a focusing knob connected to the optical module, an LCD screen on a front side of the housing for displaying the image of the endface of the connector interfaced with the apparatus, and a cleaner module. In conjunction with a set of universal tips for male connectors, a set of converters are provided to form universal tips for female connectors, which greatly simplifies the overall tip family.

Abstract: A device for shifting the imaging axis of a microscope across the endfaces of a multi-fiber connector for inspecting the fiber-optic endfaces through the microscope comprises a supporting body for attaching at one end to the optical tube of a microscope; a pendular arm rotatably mounted to another end of the supporting body; a fitting tip attached to another end of the pendular arm; a bevel wheel fastened to the supporting body; and a torsion spring for pushing the pendular arm against a slanted surface of the bevel wheel. The bevel wheel is adapted to swing the pendular arm relative to the supporting body so that the imaging axis of the microscope is moved relative to the fitting tip to selectively align the imaging axis between adjacent fiber-optic endfaces for inspection.

Abstract: A micro-optic fiber device is provided with independent counter-bore tubes and coupling tubes serving as couplers for coupling the optical processing elements, micro lenses and the fiber pigtails. The micro-optic fiber device can be built using direct coupling manner, wherein the optical processing element is firstly inserted and fixed in the step groove of the counter-bore tube by applying bonding agent between the outer periphery of the optical processing element and the inner surface of the step groove, and then the counter-bore tube is coupled with the coupling tubes, thus eliminating the need of using bonding agent between the optical processing element and the micro lenses and preventing the bonding agent from diffusing and spreading over the optical path.