Abstract: A power supply includes a boost converter, a capacitor, a step-down converter and a control unit. The boost converter, when activated, converts an input voltage into a boost voltage. The capacitor has a bulk voltage which is equal to the boost voltage when the boost converter is activated. The step-down converter converts the boost voltage into a step-down voltage for output. While the boost converter is deactivated, the control unit samples the input voltage and the bulk voltage, calculates an estimated value, and determines a calibration parameter. While the boost converter is activated, the control unit calculates a calibration value for enabling the boost converter to convert the input voltage with reference to the calibration value.

Abstract: A method for estimating a distance between a first target and a second target in an image is to be implemented using a distance estimation system that includes a processor module. In the method, the processor module is programmed to: generate an image depth map associated with the image; generate first position information associated with a first position which corresponds to the first target in the image, and second position information associated with a second position which corresponds to the second target in the image; and compute an estimate of a distance between the first target and the second target based on at least the image depth map, the first position information, and the second position information.

Abstract: An LED driver of an LED tube includes: an AC-to-DC converting module converting an AC voltage received from a ballast into an intermediate DC voltage that is smaller than or equal to a predetermined threshold voltage, and a DC-to-DC converting module converting the intermediate DC voltage into a DC output voltage for driving LEDs of the LED tube.

Abstract: A power supply device includes a main unit and a power switching module. The main unit includes a primary circuit board, a transformer including a primary and a secondary coil, a primary-side circuit and a secondary-side circuit. The power switching module includes a separate PCB formed with at least two connection pads and two conductive tracks, and at least one power switching element disposed on the PCB and having two terminals respectively connected to the two connection pads through the two conductive tracks. The power switching module is in the form of a separate PCB that is electrically connected to the primary- or secondary-side circuits through the two connection pads.

Abstract: A lens, which is adapted to control distribution of light emitted by a light source, includes a curved light-projecting surface distal from the light source, and a light-incident surface opposite to the light-projecting surface. The light-incident surface includes a plurality of curved sections facing the light source, and a plurality of connecting sections. Each of the connecting sections interconnects two adjacent ones of the curved sections, and has opposite first and second connection sides that are respectively connected to the two adjacent ones of the curved sections. A distance between the first connection side and the light source is not equal to a distance between the second connection side and the light source.

Abstract: A housing includes a housing body formed with an engaging groove and a carrier device disposed in the housing body. The carrier device includes a carrier frame and a latching assembly. The carrier frame is configured to carry an electronic component and includes a pivoting sidewall rotatably pivoted to the housing body. The carrier frame is rotatable between a first position, where the carrier frame is disposed in the housing body, and a second position, where the carrier frame is pivoted out of the housing body. The latching assembly is disposed on the pivoting sidewall and is releasably engaged to the engaging groove so as to position the carrier frame at the second position.

Abstract: A deep UV LED chip includes a light-emitting unit, an electrode unit, an electron blocking layer, and an optical layer. The electron blocking layer is disposed between a multiple quantum well layer and a p-type aluminum gallium nitride layer of the light-emitting unit. The optical layer is formed on the light-emitting unit and has a refractive index ranging from 1.0 to 2.3. Another deep UV LED chip further includes a light-transmitting substrate. The optical layer is formed on the light-transmitting substrate and has a refractive index ranging from 1.0 to a refractive index of the light-transmitting substrate. A package structure containing the deep UV LED chip is also disclosed.

Abstract: A buck converter includes: a first input terminal; a second input terminal; a first output terminal; a second output terminal; an internal node; a first inductor, a second inductor and a main switch connected in series between the first input terminal and the internal node; a third inductor connected between the internal node and the first output terminal; a fourth inductor connected between the second input terminal and the second output terminal; a first auxiliary switch connected between the internal node and the second output terminal; and a second auxiliary switch connected between the second input terminal and the first output terminal.

Abstract: A manufacturing method of filling a resin into a housing includes the steps of: providing a housing that has at least one recess, with the recess having first and second spaces, and the first space being disposed above the second space; inverting the housing; injecting a fluid into the recess to fill the first space, with the fluid having a viscosity coefficient and a surface tension less than those of water; and injecting a first resin into the recess, with the first resin having a specific gravity greater than that of the fluid, such that the first resin fills the first space and the fluid fills the second space.

Abstract: A method for estimating operation parameters of a servomotor is described. The method includes the steps of: driving the servomotor to rotate stably at an initial angular velocity; computing d- and q-axis components of an initial voltage when the servomotor rotates at the initial angular velocity; accelerating the servomotor to a predetermined angular velocity according to the initial voltage; and computing at least one operation parameter of the servomotor after the servomotor rotates at the predetermined angular velocity.

Abstract: An interleaved buck converter performs buck conversion by controlling operation of each of two switches thereof between an ON state and an OFF state. The switches have the same switching period and the same ON time interval, and a time delay from switching of one of the switches into the ON state to switching of the other one of the switches into the ON state equals the ON time interval of the switches minus a predetermined time interval.

Abstract: A method of manufacturing LED packages includes the steps of: forming a conductive circuit layer on a substrate; screen printing a wall layer on the conductive circuit layer to form a trellis with a plurality of wall units, so that regions of the conductive circuit layer surrounded by the wall units are exposed; mounting and electrically connecting at least one LED die on the conductive circuit layer within each of the wall units; molding a transparent layer to cover the LED dies; and cutting along the wall units to form a plurality of LED packages.

Abstract: A flatbed scanning device of a paper feeding scanning equipment includes a device casing and a scanning module. The device casing includes a first glass plate, and a second glass plate spaced apart from the first glass plate and having a bottom surface. The scanning module is disposed in the device casing, and including a module body, a scanning assembly disposed in the module body, and at least one contact assembly disposed on the module body. When the scanning module is in an initial position, the scanning assembly is located below the first glass plate, and the at least one contact assembly abuttingly contacts the bottom surface of the second glass plate.

Abstract: A power supply apparatus includes a switch, a converting module and a control module. When the switch operates in an ON state, an input voltage is outputted through the switch to serve as an output voltage. The converting module selectively converts the input voltage into the output voltage. When the power supply apparatus operates in a mode where the switch operates in an OFF state, where the converting module performs the conversion, and where the output voltage is stabilized at a target voltage value, and when a condition associated with the input voltage is met, the control module causes the output voltage to gradually change toward the input voltage.

Abstract: A method for estimating a distance between a first target and a second target in an image is to be implemented using a distance estimation system that includes a processor module. In the method, the processor module is programmed to: generate an image depth map associated with the image; generate first position information associated with a first position which corresponds to the first target in the image, and second position information associated with a second position which corresponds to the second target in the image; and compute an estimate of a distance between the first target and the second target based on at least the image depth map, the first position information, and the second position information.

Abstract: A single-stage AC-to-DC converter includes a bus capacitor, a power factor correcting module, a resonant converting module and a control module. The power factor correcting module generates, based on an AC (alternating current) input voltage, a first control signal and a second control signal, a DC (direct current) bus voltage across the bus capacitor and an intermediate voltage switching between the bus voltage and zero. The resonant converting module generates a DC output voltage based on the intermediate voltage. The control module generates, based on the bus voltage, the first and second control signals, each of which switches between an active state and an inactive state and has a duty cycle associated with the bus voltage.

Abstract: A separating device includes a base, a feed mechanism operable to convey first and second electronic component to a discharge end thereof, and a separating mechanism disposed on the base and including a first carrier connected slidably to the base and configured to carry the first electronic component, a second carrier connected slidably to the base and configured to carry the second electronic component, and a drive unit for driving reciprocation of the first and second carriers between a pick-up position, where the first carrier abuts against the second carrier, and a separating position, where the first and second carriers are separated from each other.

Abstract: A control method for implementation in a power supply system includes steps (A), (B), and (C). In step (A), while the power supply system is providing electricity to a load, a control circuit determines, an estimated capacitance value related to an output capacitor. In step (B), while the output capacitor is providing electricity to the load, the control circuit determines an average power value related to the electricity provided by the output capacitor to the load. In step (C), the control circuit determines an estimated hold-up time value related to the power supply system based on a predetermined target voltage value, a predetermined minimum voltage value, the average power value and the estimated capacitance value.

Abstract: A quasi-resonant half-bridge converter includes a switch unit including first and second switches that are coupled in series, a capacitor unit coupled to the switch unit in parallel, a rectifier unit, an output capacitor, and a transformer coupled to the aforesaid components. The first and second switches are respectively controlled using first and second control signals that have a constant frequency. Duty cycles of the first and second control signals may be adjusted based upon a DC output voltage across the output capacitor for promoting conversion efficiency of the converter when operating at light load.

Abstract: A resonant converter includes: a transformer including a first primary winding, a second primary winding and a secondary winding, each primary winding having a first end terminal and a second end terminal; a first switch coupled to the first end terminal of the first primary winding; a resonant inductor and a resonant capacitor connected in series between the second end terminal of the first primary winding and the first end terminal of the second primary winding; a second switch coupled between the first end terminals of the first and second primary windings; and a third switch coupled between the second end terminals of the first and second primary windings.