Abstract: A photovoltaic powered system and an alternating current (AC) module thereof are disclosed. The photovoltaic powered system provides a direct current (DC) power through a photovoltaic module and converts the DC power into an AC power, which is grid-connected to an AC utility power. The AC module of the photovoltaic powered system produces a continuous quasi-sinusoidal current and the quasi-sinusoidal current is converted into a sinusoidal current. The high-frequency harmonic components of the sinusoidal current are filtered to produce a sinusoidal output current in phase with the AC utility power, thus realizing the maximum power point tracking (MPPT) of the photovoltaic module and feeding unity-power-factor power into the AC utility power.

Abstract: A micro-machining tool is disclosed herein. It includes a micro-moving platform, a supporting device to support the micro-moving platform, an anti-rotation device embedded in a bar for preventing the supporting device from rotating, and a fixing device for fixing the supporting device for limiting its rotation as the bar is moving.

Abstract: An air-puff type intraocular pressure measuring device includes an optical measuring unit and a puffing unit. The optical measuring unit includes an imaging optical path having a perforated lens and an image sensor capable of receiving an eyeball image via the perforated lens for eyeball alignment; a measuring optical path having a measuring element for transmitting a measuring signal and receiving a reflected signal via the perforated lens to derive an intraocular pressure value; and a beam splitter for the image sensor and the measuring element to respectively form a first and a second path having different axial directions. The puffing unit is connected to the optical measuring unit for puffing air through the perforated lens against an eyeball. The puffing unit has a puffing path located coaxially on the second path of the measuring optical path, so that measuring errors caused by parts-related tolerances are effectively reduced.

Abstract: A protective case includes a housing defining a receptacle for accommodating an electronic device including a main body and a display fixed to the main body, a first buffer layer fixed in the receptacle, a cover releasably latched to the housing, and a second buffer layer fixed to the cover. The first buffer layer encloses the main body to protect the main body from damage when the electronic device is accommodated in the receptacle. When the cover is latched to the housing, the second buffer layer, the second buffer layer contacts with and protect the display from damage.

Abstract: A coaxial connector includes a lower insulating seat, having a housing cavity recessed from an upper surface thereof, and a receiving slot is located on one side of the housing cavity; a movable terminal, having a retained portion retained in the receiving slot, a pressed portion extended from the retained portion, a first soldering portion bent downwards and extended from the retained portion, and a first strip-connecting portion extended outwards from the retained portion and coplanar with the retained portion; and a fixed terminal, having a fixed portion embedded in the lower insulating seat and coplanar with the retained portion, a pressing portion extended from the fixed portion and urging against the pressed portion, a second soldering portion extended from the fixed portion, and coplanar with the first soldering portion, a second strip-connecting portion extends from the second soldering portion, and in different planes with the first strip-connecting portion.

Abstract: Determining if an input image is a foggy image includes determining an average luminance gray level of the input image, performing Sobel image processing on the input image to generate a Sobel image of the input image when the average luminance gray level of the input image is between a first image average luminance and a second image average luminance, determining a first normalization value and a second normalization value of the input image, determining a mean value and a standard deviation of the Sobel image when the first normalization value and the second normalization value are less than a first threshold value, and determining the input image as a foggy image when a sum of the mean value and the standard deviation is less than a second threshold value.

Abstract: A coaxial connector includes a lower insulating seat, having a housing cavity recessed from an upper surface thereof, and a receiving slot is located on one side of the housing cavity; a movable terminal, having a retained portion retained in the receiving slot, a pressed portion extended from the retained portion, a first soldering portion bent downwards and extended from the retained portion, and a first strip-connecting portion extended outwards from the retained portion and coplanar with the retained portion; and a fixed terminal, having a fixed portion embedded in the lower insulating seat and coplanar with the retained portion, a pressing portion extended from the fixed portion and urging against the pressed portion, a second soldering portion extended from the fixed portion, and coplanar with the first soldering portion, a second strip-connecting portion extends from the second soldering portion, and in different planes with the first strip-connecting portion.

Abstract: A three-phase power supply with a three-phase three-level DC/DC converter includes a full-bridge thyristor converter with three-set four in-series power switch elements, a three-phase isolated transformer, a full-bridge rectifier, a rectifying circuit, and a low-pass filtering circuit. The three-phase power supply is used to deliver power energy from the AC input voltage to the load. The power switch elements, which separated to each other at 120-degree phase differences, are controlled through a phase shift scheme. Therefore, the three-level circuit structure is provided to reduce withstanding voltage of the power switch elements, further the zero-voltage switching (ZVS) is achieved by the isolated transformer and the power switch elements to increase the efficiency of the DC/DC converter.

Abstract: A method for managing a user's personal information, comprises the steps of, managing one or more electronic user profiles; selecting one of the user profiles; joining a virtual room having one or more members; using the selected profile to communicate with the members of the virtual room; and communicating with one or more of the members.

Abstract: The present invention discloses a portable folding tattoo chair comprising a left part (100) and a right part (200), the left part (100) of the chair comprising a left cushion (101), a left fixing plate (102), a left fixing frame (103) and a left footing support (104); the right part (200) of the chair comprising a right cushion (201), a right fixing plate (202), a right fixing frame (203) and a right footing support (204); the left part (100) and the right part (200) of the chair being rotatable so as to be folded together, the left footing support (104) and the right footing support (204) being rotatable to be folded up. The tattoo chair in unfolding states may provide various auxiliary modes for different tattoo positions. The chair can also be folded after use to save space and transportation cost. The chair can be used as a pushcart to add functionality.

Abstract: 3D liquid crystal shutter glasses in the present invention include LCD lenses (1) and a control circuit (20, 30) which is operable to receive sync RF signal and drive the LCD lenses operation. The control circuit includes: an RF receiver for receiving sync signal (2); an LCD driver (3) for driving the LCD lenses operation; a boost circuitry (4) for supplying an operating voltage to the LCD driver; a CPU (5) for controlling the RF receiver, LCD driver and boost circuitry; a power control module (7); and a battery (6) for powering the control circuit via the power control module. The glasses can eliminate the impact from light in environment and the orientation limited, and improve the viewing effect and quality of 3D image or video. Therefore, it is more practical.

Abstract: 3D liquid crystal shutter glasses include a pair of LCD lenses (1), and a control circuit (100) associated with the LCD lenses. The LCD lens includes an LCD-glass layer (2), a front polarizing filter (3), and a transparent scratchproof layer (4) laminated together. The control circuit includes a sync signal receiver (5), an LCD driver (6) for controlling LCD lenses, a boost circuitry (7) associated with LCD driver for outputting a drive voltage to the LCD driver, a CPU (8) which is respectively associated with the receiver, LCD driver, and boost circuitry for controlling operation of the same, and a power supply module (11) for powering the control circuit. The lenses prevent light in environment affecting and flaring thereon. The light transmittance of the lenses is approximated to 40%. Accordingly, the 3D glasses present the user brighter and lively image in higher quality, and avoid hurting user's eyesight.

Abstract: A control circuit and method are proposed to generate a control signal to operate a buck-boost power stage of a buck-boost power converter to convert an input voltage to an output voltage. The control circuit and method detect the output voltage to generate an error signal, control the frequency of two ramp signals according to the error signal, generate two pulse width modulation signals according to the error signal and the two ramp signals, and generate the control signal according to the two pulse width modulation signals. When the loading of the buck-boost power converter transits from heavy to light, the frequency of the two ramp signals is decreased to improve the efficiency of the buck-boost power converter. The peaks and valleys of the two ramp signals may be adjusted by signals related to the input voltage and the output voltage.

Abstract: A control circuit and method for a PWM voltage regulator combine a high frequency feedback technique with a constant on-time or constant off-time topology to improve the transient performance of the PWM voltage regulator. The PWM voltage regulator generates a constant on-time or constant off-time depending on a current for generating a PWM signal, and dynamically adjusts the current according to the droop-voltage at its output during a transient period. Therefore, the PWM voltage regulator boosts its transient response without any threshold for load step detection.

Abstract: A control device is disclosed, having a signal generating circuit and a mode decision circuit. The signal generating circuit is used to generate a first control signal and a second control signal according to an output voltage of a buck-boost converter. The first control signal is used to conduct a first switch and a second switch of the buck-boost converter. The second control signal is used to conduct a third switch and a fourth switch of the buck-boost converter. When the duty cycle of the first control signal is greater than a first predetermined value and the duty cycle of the second control signal is less than a second predetermined value, the mode decision circuit configures the signal generating circuit to generate the first control signal and the second control signal with substantially the same duty cycle.

Abstract: An apparatus comprises two n-type metal oxide semiconductor (MOS) devices formed next to each other. Each n-type MOS device further includes a pair of face-to-face diodes formed in an isolation ring. A method of modeling the apparatus comprises reusing four-terminal MOS device models in standard cell libraries and combining the four-terminal MOS device model and the isolation ring model into a 4T MOS plus isolation ring model. The method of modeling the apparatus further comprises adding a dummy device between a body contact of the first n-type MOS device and a body contact of the second n-type MOS device.

Abstract: Resource management system is provided, implemented between a service bundle developer and provider and a service bundle user. A resource requirement determining device determines a system resource requirement for a service bundle provided by the service bundle developer and provider, and generates resource requirement information corresponding to the service bundle. A processor receives information of system resource utilization status from the service bundle user, determines whether available resource of the service bundle user is sufficient for the resource requirement of the service bundle, when the available resource of the service bundle user is insufficient, the processor generates a waiting queue, and adds the service bundle into the waiting queue. When available resource of the service bundle user is sufficient, the processor installs the service bundle specified in the waiting queue in the service user. A storage device stores the waiting queue and corresponding resource requirement information.

Abstract: The present invention discloses a head-up display (HUD) comprising an image display element, a plurality of light sources and a set of light guide components, wherein after a light beam of each light source is projected into the set of light guide components, paths of all light beams are regulated by the light guide components to deflect and concentrate at a driver's viewing range to enhance the light intensity of each light beam, and each area of the image display element is illuminated by a portion of the light sources only, so as to reduce the quantity of required light sources and achieve an overall light and thin effect of the head-up display (HUD).