Abstract: Disclosed is a lighting device (1) comprising a housing (80), an air inlet (22) and an air outlet (24); a support structure (30) in said housing extending in between said air inlet and said air outlet, said support structure including a section (32) carrying at least one solid state lighting element (10); a conduit (20) from said air inlet to said air outlet such that the conduit extends over the support structure; and a fan (40) mounted in said conduit, wherein the fan is located closer to the air inlet than to the air outlet. A luminaire including such a lighting device is also disclosed.

Abstract: An article includes a substrate, a Ti-bottom layer deposited on the substrate and a TiN/TiC coating deposited on the Ti-bottom layer. The TiN/TiC coating includes a plurality of TiN-nano layers and a plurality of TiC-nano layers. Each TiN-nano layer and each TiC-nano layers are alternately deposited on the Ti-bottom layer. The TiN/TiC coating has good toughness and high hardness. A method for manufacturing the TiN/TiC coating is also provided.

Abstract: A light-emitting diode (LED) tube lamp comprises a lamp tube, a first rectifying circuit, a filtering circuit and an LED driving module. The lamp tube has a first pin and a second pin for receiving an external driving signal. The first rectifying circuit is coupled to the first and second pins, for rectifying the external driving signal to produce a rectified signal. The filtering circuit is coupled to the first rectifying circuit, for filtering the rectified signal to produce a filtered signal. The LED driving module is coupled to the filtering circuit to receive the filtered signal for emitting light. Wherein, the filtering circuit includes a capacitor and an inductor connected in parallel and between one of the first and second pins and the first rectifying circuit, and the parallel-connected capacitor and inductor are configured for presenting a peak equivalent impedance to the external driving signal at a specific frequency.

Abstract: A step-down circuit has a switch connected in series between a direct current power supply and a load. A switch control circuit is configured to turn the switch off when the voltage across the load is higher than a predetermined first threshold and turn the switch on when the voltage across the load is lower than the first threshold. An energy storage unit is charged by the power supply when the switch is on and supply power to the load when the switch is off An overcurrent protection circuit turns the switch off when the input current of the switch is higher than a predetermined second threshold.

Abstract: A lighting device (1) comprising a driver (7) arranged at a base (2) of the lighting device (1), a heat sink (14) arranged at a portion (3) of the lighting device (1), separate from the driver (7), a light source (13) mounted to the heat sink (14), and a wire (10) arranged to electrically connect the light source (13) to the driver (7), wherein a portion of the wire (10) extending from the base (2) to the portion of the lighting device (1) is arranged to be exposed to light from the light source (13). The present embodiment is advantageous in that the thermal performance is improved and the lifetime of the lighting device (1) is increased. Further, the exposed wire (10) may be illuminated by the light source (13) and visible from outside the lighting device (1), thereby having the appearance of a filament.

Abstract: An ultrasonic transducer detector having a high operating frequency is provided. The ultrasonic transducer detector comprises a substrate and an ultrasonic transducer array. The substrate has a plurality of openings, and the ultrasonic transducer array is disposed on the substrate. The ultrasonic transducer array has a plurality of resonance units, and the thickness of each resonance unit is equivalent to ½ wavelength of the operating frequency of the ultrasonic transducer. Each resonance unit comprises an oscillating element and a piezoelectric element. The oscillating element has a first surface adjacent to the substrate, and the piezoelectric element is disposed on the first surface and located in the corresponding opening.

Abstract: A cooling system for a battery pack includes a fluid source for providing cooling fluid and a turbulator in which the cooling fluid flows along an average flow direction. The turbulator includes a first support member, a second support member, a third support member, a first plurality of rods positioned between the first support member and the second support member, and a second plurality of rods positioned between the second and the third support members. The first plurality of rods is offset from the second plurality of rods in a direction perpendicular to the average flow direction. Finally, the first plurality of rods and the second plurality of rods disrupt fluid flow from the fluid source into non-laminar flow.

Abstract: A system for cooling a semiconductor light source bar during burn-in testing includes a fixture for holding the semiconductor light source bar, and the fixture including a housing having a water inlet channel and a water outlet channel communicated with the water inlet channel; a first water tank with coolant connected with the water inlet channel; a second water tank connected with the water outlet channel; and a pumping device at least connected with the water outlet channel for pumping the coolant from the first water tank to the second water tank, thereby rushing a bottom of the semiconductor light source bar to lower the temperature thereof. The system can disperse the local heat generated during burn-in testing and uniform the local temperature of the semiconductor light source bar, thereby maintaining a proper temperature during burn-in testing and improving the heat stability of the heat assist magnetic recording head.

Abstract: A programmable system includes a first level protection circuit comprised of discharge tube CR1/ CR2 and piezoresistor MOV1/MOV2 in series; a second-level protection circuit comprised of the series arm of capacitor C1 and resistor R1 in parallel with a transient voltage suppression diode TVS1, and inductors L1/L2 connected to the ends of first level and second-level protection circuits respectively. A control circuit includes a PWM driver module and a SCM. The PWM driver module is connected to the PWM control port of the SCM and its output is connected to an IGBT module. The control circuit is also connected to a series communication module and to a user interface. The features of the invention are: strong-shock resistance; a wide range of load adaptability; and ability of accurately and steplessly regulating and adjusting with high frequency and high power load.

Abstract: According to an embodiment of the disclosure, an acoustics transducer is provided, which includes a support substrate having an upper surface and a lower surface, the upper surface including a first portion and a second portion surrounding the first portion, a recess extending from the upper surface towards the lower surface, the recess is between the first portion and the second portion of the upper surface, a vibratable membrane disposed directly on the recess, the vibratable membrane including a fixed portion fixed on the support substrate and a suspended portion, and a back plate disposed on the support substrate and opposite to the vibratable membrane. The suspended portion has an edge extending substantially along with an edge of an opening of the recess. The suspended portion is separated from the first portion and the second portion of the upper surface by an inner interval and an outer interval, respectively.

Abstract: A solar cell includes a cathode component, an anode component, sealant for assembling the cathode component and the anode component to form a closed space, and electrolyte accommodated in the closed space, in which the cathode component contains a lower transparent conductive substrate, a nano-oxide semiconductor thin film formed on the lower transparent conductive substrate, and dye attached to a nano-particle surface of the nano-oxide semiconductor thin film; and the anode component contains an upper transparent conductive substrate, and an anode electrode layer formed on the upper transparent conductive substrate, the nano-oxide semiconductor thin film and the anode electrode layer being arranged opposite to each other and contacting with the electrolyte, in which the anode component further contains a CdTe layer which is patterned to have an opening, and the anode electrode layer is located in the opening of the CdTe layer.

Abstract: An ultrasonic transducer detector having a high operating frequency is provided. The ultrasonic transducer detector comprises a substrate and an ultrasonic transducer array. The substrate has a plurality of openings, and the ultrasonic transducer array is disposed on the substrate. The ultrasonic transducer array has a plurality of resonance units, and the thickness of each resonance unit is equivalent to ½ wavelength of the operating frequency of the ultrasonic transducer. Each resonance unit comprises an oscillating element and a piezoelectric element. The oscillating element has a first surface adjacent to the substrate, and the piezoelectric element is disposed on the first surface and located in the corresponding opening.

Abstract: To provide a manufacturing method which can adjust the lengths of a recording element and a reproducing element for enabling manufacture of high-quality magnetic head sliders. The manufacturing method comprises: a stacked-layer forming step which stacks magnetic heads on a substrate; a lapping step which cuts out a bar block having a plurality of connected magnetic head sliders, and polishes a flying surface; and a slider cutting step which cuts out individual magnetic head sliders from the bar block. The stacked-layer forming step forms a reproducing-element polish amount detecting sensor on a same layer as that of the reproducing element, and forms a recording-element polish amount detecting sensor on a same layer as that of the recording element. The lapping step carries out polishing based on each output value of the reproducing-element polish amount detecting sensor and the recording-element polish amount detecting sensor.

Abstract: An electric motor system has a first electric motor, a second electric motor and a control circuit shared by the first motor and the second motor. At least one of the first motor and the second motor is a permanent magnet brushless motor that has a permanent magnet rotor and a stator with stator windings which generate a rotating magnetic field when electrified. The control circuit is configured to control the brushless motor to operate in a synchronous mode so that the rotor rotates in synchronism with the magnetic field of the stator. The electric motor system may be used in a household appliance.

Abstract: A flexible energy saving lighting power supply system includes a first level protection circuit composed of discharge tube CR1/CR2 and piezoresistor MOV1/MOV2 in series; and a second-level protection circuit composed of series arm of capacitor C1 and resistor R1 which is parallel with transient voltage suppression diode TVS1, and inductors L1/L2 connected to the ends of first level and second-level protection circuit protection circuit respectively. Control circuit includes PWM driver module and SCM. PWM driver module is connected to the PWM control port of SCM and its output is connected to IGBT module. Control circuit is also connected to series communication module and user interface. The features of the invention are: strong-shock resistance; a wide range of load adaptability; capacity of accurately and steplessly regulating and adjusting high frequency, high voltage load.

Abstract: A movable touch module and an electronic device using the same are provided. The movable touch module is disposed at a main body and includes a first movable element, a second movable element, a touch unit, at least four movement sensing elements, and at least two rotation sensing elements. The first movable element is disposed at the main body and is rotatable relative to the main body on a plane. The second movable element is disposed at the first movable element and is capable of moving relative to the first movable element along a first direction. The touch unit is disposed at the second movable element and is capable of moving relative to the second movable element along a second direction. The movement sensing elements and the rotation sensing elements are fastened to the main body.

Abstract: A high efficiency multiring solar cell (MRSC) system, including a number of single-junction solar cells and utilizing a novel multiring architecture is disclosed. Sunlight from the solar concentrator illuminates a double cone prism to create spatially separated spectral bands. Projection of the spectral bands on working surfaces of solar cells creates a sequence of spatially separated spectral rings, where rings corresponding to the spectral bands with longer wavelengths are enclosed by the rings corresponding to shorter wavelengths. The number of solar cells and their shape corresponds to the number and the shape of the respective spectral rings. Each solar cell is optimized for efficiently converting the sunlight from the corresponding spectral band. A corresponding method of forming solar cells and converting sunlight into electricity are also provided.