Abstract: A soft-switching power converter includes a main switch, an energy-releasing switch, and an inductive coupled unit. The main switch is a controllable switch. The energy-releasing switch is coupled to the main switch. The inductive coupled unit is coupled to the main switch and the energy-releasing switch. The inductive coupled unit includes a first inductance, a second inductance coupled to the first inductance, and an auxiliary switch unit. The auxiliary switch unit is coupled to the second inductance to form a closed loop. The main switch and the energy-releasing switch are alternately turned on and turned off. The auxiliary switch unit is controlled to start turning on before the main switch is turned on so as to provide at least one current path.

Abstract: A soft-switching power converter includes a main switch, an energy-releasing switch, and an inductive coupled unit. The main switch is a controllable switch. The energy-releasing switch is coupled to the main switch. The inductive coupled unit is coupled to the main switch and the energy-releasing switch. The inductive coupled unit includes a first inductance, a second inductance coupled to the first inductance, and an auxiliary switch unit. The auxiliary switch unit is coupled to the second inductance to form a closed loop. The main switch and the energy-releasing switch are alternately turned on and turned off. The auxiliary switch unit is controlled to start turning on before the main switch is turned on so as to provide at least one current path.

Abstract: An uninterruptible power apparatus is coupled between a power grid and a load. The uninterruptible power apparatus includes a bypass path, a power conversion module, and a control module. The bypass path is coupled to the power grid through a grid terminal, and coupled to the load through a load terminal. The control module turns off a first thyristor and a second thyristor by injecting a second voltage into the load terminal during a forced commutation period. The control module calculates a magnetic flux offset amount based on an error amount between the second voltage and a voltage command, and provides a compensation command in response to the magnetic flux offset amount. The control module controls the DC/AC conversion circuit to provide a third voltage to the load terminal based on the compensation command and the voltage command.

Abstract: An isolated conversion apparatus with magnetic bias balance control includes an isolated converter, a controller, and a magnetic bias balance circuit. The isolated converter includes a transformer, and a primary side of the transformer includes a primary-side winding and at least one switch bridge arm. The controller is coupled to the at least one switch bridge arm, and provides a pulse width modulation (PWM) signal group to control the at least one switch bridge arm. The magnetic bias balance circuit is coupled to two ends of the primary-side winding and the controller, and provides a compensation voltage to the controller according to an average voltage of a winding voltage across the two ends of the primary-side winding. The controller adjusts a duty cycle of the PWM signal group according to the compensation voltage to correct the magnetic bias.

Abstract: A ground fault detection apparatus is used to detect a ground fault of a three-phase UPS apparatus. The UPS apparatus includes a first filter circuit, an AC/DC conversion circuit, a DC bus, a DC/AC conversion circuit, and a second filter circuit coupled in sequence. The ground fault detection apparatus includes a detection circuit having a first detection end and a second detection end. The first detection end is coupled to the first filter circuit and the second filter circuit, and the second detection end is coupled to an equipment grounding point. The equipment grounding point is coupled to a neutral point of a three-phase power source, and the three-phase power source is coupled to the first filter circuit. The detection circuit indicates whether the UPS apparatus has a ground fault and a location where the ground fault occurs according to a detection voltage between the first detection end and the second detection end.

Abstract: An image capturing device includes a casing, a camera assembly, an adjustment element, a first stopping structure and a second stopping structure. The camera assembly is disposed within the casing. A portion of the camera assembly is exposed outside the casing. The adjustment element is connected with the camera assembly, and rotatable relative to the casing. As the adjustment element is rotated, the camera assembly is correspondingly rotated. The adjustment element includes a contacting structure. The first stopping structure and the second stopping structure are arranged between the casing and the adjustment element and located at different positions. When the camera assembly is switched to a horizontal photographing mode, the contacting structure is positioned at the first stopping structure. When the camera assembly is switched to a vertical photographing mode, the contacting structure is positioned at the second stopping structure.

Abstract: An image capturing device includes a casing, a camera assembly, an adjustment element, a first stopping structure and a second stopping structure. The camera assembly is disposed within the casing. A portion of the camera assembly is exposed outside the casing. The adjustment element is connected with the camera assembly, and rotatable relative to the casing. As the adjustment element is rotated, the camera assembly is correspondingly rotated. The adjustment element includes a contacting structure. The first stopping structure and the second stopping structure are arranged between the casing and the adjustment element and located at different positions. When the camera assembly is switched to a horizontal photographing mode, the contacting structure is positioned at the first stopping structure. When the camera assembly is switched to a vertical photographing mode, the contacting structure is positioned at the second stopping structure.

Abstract: An uninterruptible power apparatus is coupled between a power grid and a load. The uninterruptible power apparatus includes a bypass path, a power conversion module, and a control module. The bypass path is coupled to the power grid through a grid terminal, and coupled to the load through a load terminal. The control module turns off a first thyristor and a second thyristor by injecting a second voltage into the load terminal during a forced commutation period. The control module calculates a magnetic flux offset amount based on an error amount between the second voltage and a voltage command, and provides a compensation command in response to the magnetic flux offset amount. The control module controls the DC/AC conversion circuit to provide a third voltage to the load terminal based on the compensation command and the voltage command.

Abstract: A ring for clasping a cylindrical object includes a first element, a second element and a switch mechanism. The second element is circumferentially butted with the first element, and one end of the first element is adjacent to one end of the second element. The end of the second element has a protrusion protruding outwardly. The switch mechanism includes an abutting member adjacent to the end of the first element and configured to be rotated to abut against or move away from the protrusion of the end of the second element. When the abutting member is rotated and abuts against the protrusion of the end of the second element, the second element is fixed; when the abutting member is rotated and moves away from the protrusion of the end of the second element, the second element is released.

Abstract: An isolated converter with high boost ration includes a transformer, a first bridge arm, a second bridge arm, and a boost circuit. The transformer includes a secondary side having a secondary side first node and a secondary side second node. The first bridge arm includes a first diode and a second diode. The second bridge arm includes a third diode and a fourth diode. The boost circuit includes at least one fifth diode coupled between the first bridge arm and the secondary side second node, at least one sixth diode coupled between the second bridge arm and the secondary side first node, and at least two capacitors coupled to the secondary side first node and the secondary side second node.

Abstract: An uninterruptible power apparatus with a function of forced disconnection path is coupled between a grid and a load, and the uninterruptible power apparatus includes a bypass path, a power conversion module, a current detection unit, and a control module. The bypass path includes a switch unit, and the power conversion module is connected in parallel to the bypass path. The current detection unit detects a current flowing through the bypass path and transmits a current signal to the control module. The control module provides a turned-off signal to the switch unit when a first voltage of the grid is abnormal, and transmits a polarity of the current signal. The power conversion module generates a compensation amount according to the polarity, and generates an output voltage command according to the compensation amount and a voltage at an input terminal or an output terminal of the power conversion module.

Abstract: A conversion apparatus with a three-level switching circuit includes a DC conversion module, a three-level circuit, and a control unit. The three-level circuit includes a bridge arm assembly and a capacitor assembly. The capacitor assembly includes a first capacitor and a second capacitor connected to the first capacitor in series. The DC conversion module has a positive output end and a negative output end, and the positive output end and the negative output end are coupled to the bridge arm assembly. The control unit controls the switching of a second switch unit and a third switch unit to make the three-level circuit operate in a first state where the positive output end and the negative output end are connected to the first capacitor, and operate in a second state where the positive output end and the negative output end are connected to the second capacitor.

Abstract: A ground fault detection apparatus is used to detect a ground fault of a three-phase UPS apparatus. The UPS apparatus includes a first filter circuit, an AC/DC conversion circuit, a DC bus, a DC/AC conversion circuit, and a second filter circuit coupled in sequence. The ground fault detection apparatus includes a detection circuit having a first detection end and a second detection end. The first detection end is coupled to the first filter circuit and the second filter circuit, and the second detection end is coupled to an equipment grounding point. The equipment grounding point is coupled to a neutral point of a three-phase power source, and the three-phase power source is coupled to the first filter circuit. The detection circuit indicates whether the UPS apparatus has a ground fault and a location where the ground fault occurs according to a detection voltage between the first detection end and the second detection end.

Abstract: A phase retardation film is applied to an organic light-emitting diode display device and includes a biaxially stretched polymer substrate and a liquid crystal layer. The polymer substrate has a positive wavelength dispersion characteristic. A thickness of the polymer substrate is between 5 ?m and 100 ?m. The liquid crystal layer is directly coated on the polymer substrate by a full coating process, and there is no adhesion layer between the liquid crystal layer and the polymer substrate. A thickness of the liquid crystal layer is between 0.4 ?m and 5 ?m. One of the polymer substrate and the liquid crystal layer has a phase retardation of ?/2, and the other has a phase retardation of ?/4. A compensation film using the phase retardation film is also provided.

Abstract: A soft-switching power converter includes a main switch, an energy-releasing switch, and an inductive coupled unit. The main switch is a controllable switch. The energy-releasing switch is coupled to the main switch. The inductive coupled unit is coupled to the main switch and the energy-releasing switch. The inductive coupled unit includes a first inductance, a second inductance coupled to the first inductance, and an auxiliary switch unit. The auxiliary switch unit is coupled to the second inductance to form a closed loop. The main switch and the energy-releasing switch are alternately turned on and turned off. The auxiliary switch unit is controlled to start turning on before the main switch is turned on so as to provide at least one current path.

Abstract: An isolated conversion apparatus with magnetic bias balance control includes an isolated converter, a controller, and a magnetic bias balance circuit. The isolated converter includes a transformer, and a primary side of the transformer includes a primary-side winding and at least one switch bridge arm. The controller is coupled to the at least one switch bridge arm, and provides a pulse width modulation (PWM) signal group to control the at least one switch bridge arm. The magnetic bias balance circuit is coupled to two ends of the primary-side winding and the controller, and provides a compensation voltage to the controller according to an average voltage of a winding voltage across the two ends of the primary-side winding. The controller adjusts a duty cycle of the PWM signal group according to the compensation voltage to correct the magnetic bias.

Abstract: A method for operating a power factor correction (PFC) circuit of an uninterruptible power supply (UPS) apparatus is provided. The PFC circuit includes two T-type converters, and each of the T-type converters includes four switching tubes. The method includes: converting AC input voltage into a positive bus voltage across a first capacitor and a negative bus voltage across a second capacitor that is connected in series with the first capacitor when the UPS apparatus is operated under a normal supply mode; and controlling conduction states of the switching tubes of the T-type converters to balance the positive bus voltage and the negative bus voltage when the UPS apparatus is operated under a battery supply mode.

Abstract: A method of manufacturing a semiconductor structure includes providing a mask including a first substrate; a first mask layer disposed over the first substrate, including a plurality of first recesses extended through the first mask layer; a second mask layer disposed over the first mask layer and including a plurality of second recesses extended through the second mask layer; providing a second substrate including a photoresist disposed over the second substrate; and projecting a predetermined electromagnetic radiation through the mask towards the photoresist, wherein the first mask layer is at least partially transparent to the predetermined electromagnetic radiation, the second mask layer is opaque to the predetermined electromagnetic radiation, and at least a portion of the second mask layer is disposed between two of the plurality of second recesses.

Abstract: A conversion apparatus with a three-level switching circuit includes a DC conversion module, a three-level circuit, and a control unit. The three-level circuit includes a bridge arm assembly and a capacitor assembly. The capacitor assembly includes a first capacitor and a second capacitor connected to the first capacitor in series. The DC conversion module has a positive output end and a negative output end, and the positive output end and the negative output end are coupled to the bridge arm assembly. The control unit controls the switching of a second switch unit and a third switch unit to make the three-level circuit operate in a first state where the positive output end and the negative output end are connected to the first capacitor, and operate in a second state where the positive output end and the negative output end are connected to the second capacitor.

Abstract: A method of manufacturing a semiconductor structure includes providing a mask including a first substrate; a first mask layer disposed over the first substrate, including a plurality of first recesses extended through the first mask layer; a second mask layer disposed over the first mask layer and including a plurality of second recesses extended through the second mask layer; providing a second substrate including a photoresist disposed over the second substrate; and projecting a predetermined electromagnetic radiation through the mask towards the photoresist, wherein the first mask layer is at least partially transparent to the predetermined electromagnetic radiation, the second mask layer is opaque to the predetermined electromagnetic radiation, and at least a portion of the second mask layer is disposed between two of the plurality of second recesses.