60results about How to "Maximize conversion efficiency" patented technology

In a method for forming a light absorber layer (4) of a thin film solar cell, the absorber layer is formed from a plurality of sub-layers each of which is formed by preparing a plurality of mixtures containing Cu, Se, In and Ga in a liquid medium, a composition ratio of In to Ga being progressively increased from one mixture to another, the mixtures optionally including a mixture containing no In or Ga; applying a layer of one of the mixtures onto a back electrode layer (3) formed on a substrate (2); drying the applied layer of the mixture; and rapidly baking the dried layer of the mixture. By forming the absorber layer with a plurality of thin absorber sub-layers each having a controlled band gap, a solar cell having a large surface area can be fabricated at low cost and the efficiency of the solar cell can be improved by forming a favorable band gap gradient structure. As these sub-layers can be applied simply by any known processes, the method of the present invention is highly suited to be used for mass producing solar cells.

The invention provides a hybrid multi-output power supply and a regulating method thereof. The hybrid multi-output power supply is used for generating a constant-voltage output to drive a load and generating a constant-current output to drive a light-emitting diode (LED) and comprises a primary voltage regulating circuit, a secondary voltage regulating circuit and a driving circuit. Only a primary voltage converting circuit is required to acquire driving voltage which is required to support a sequent LED, so that an implementing circuit and a control scheme of the hybrid multi-output power supply are relatively simple, the structure of the circuit is simplified, and the implementing cost is reduced; and furthermore, first regulating voltage can be regulated according to change of the current of the LED, so that the numerical value of the first regulating voltage can be always kept the minimum voltage value capable of driving all the circuits of the LED along with the change of the current of the LED, and the power converting efficiency is improved to the maximum extent.

The present invention discloses an integrated voltage regulator comprising a switching regulation and an additional regulation mechanism. The additional regulation mechanism permits better control of the voltage regulator to enable improved performance. The present invention integrated voltage regulator provides an output voltage Vout in the formVout=(Vin−Vamp)*(Duty Cycle)−Vslewwhere the additional regulation mechanism comprises an amplitude modulation Vamp to modulate the input voltage Vin, a slew rate modulation Vslew to modulate the output voltage Vout, or a combination of amplitude modulation and slew rate modulation.

Proposed is a wavelength converting device (100) comprising a non-linear optical crystal (10) having periodically poled regions (20,30) with alternating polarity. The device (100) is characterized in that the period (41,42) of the poled regions along an axis (X) of the device vary in a direction (Y) perpendicular to the axis. The invention is based on the insight that a poling period corresponds to a given temperature. Thus, providing different poling periods along a direction in the wavelength converting device advantageously allows correlating the position of the device along that direction with a temperature.

A system and method for controlling an engine to regulate the oxygen storage level in an emission control device are provided. The system includes oxygen sensors disposed in an exhaust gas stream of the engine upstream and downstream of the emission control device. The oxygen sensors generate a feedgas and tailpipe air fuel signals. The system includes an electronic control unit (ECU) configured to obtain an adjusted feedgas air fuel ratio responsive to the feedgas and tailpipe air fuel signals to correct bias in the feedgas air fuel signal. The (ECU) is further configured to obtain an estimate of an oxygen storage level in the emission control device responsive to the adjusted feedgas air fuel ratio and the tailpipe air fuel signal. Finally, the (ECU) is configured to generate a control signal for the engine responsive to the adjusted feedgas air fuel ratio and the oxygen storage level estimate.

The present invention discloses an integrated voltage regulator comprising a switching regulation and an additional regulation mechanism. The additional regulation mechanism permits better control of the voltage regulator to enable improved performance. The present invention integrated voltage regulator provides an output voltage Vout in the form Vout=(Vin−Vamp)*(Duty Cycle)−Vslew where the additional regulation mechanism comprises an amplitude modulation Vamp to modulate the input voltage Vin, a slew rate modulation Vslew to modulate the output voltage Vout, or a combination of amplitude modulation and slew rate modulation.

A unit nano photo cell comprised of a first component of conductive or semi conductive crystalline material, forming a backbone which spreads out in a three dimensional structural fashion, a second component of at least one photo active material bound to the first component, and a third component of carrier mobility promoter material bound to the second component, all of which together constitute a framework for separating electrons from holes when a light source is provide to the unit nano photo cell such that the second component acts as a photo active center, converting incoming photons into pairs of electron-holes, the first component transports electrons from the second component to a common bottom plate, and the third component extracts the holes from the second component and discharges them via a conductive pathway to a common top plate.

Provided are a variable gain amplifier and a receiver including the same. The variable gain amplifier includes: a gain controller generating a gain control voltage; a variable gain amplifier amplifying an input signal and a feedback signal by using a voltage gain that is linearly proportional to the gain control voltage, and converting the amplified signal into a predetermined magnitude of a signal; and an offset canceller removing an offset from an output signal of the variable gain amplifier and outputting the offset removed result as the feedback signal. The variable gain amplifier includes a plurality of operational transconductance amplifiers.

The invention discloses a method for building a solar power station model through shade analysis. The method comprises the following steps of: acquiring terrain data, obstacle data and solar power module data; drawing a shadow distribution map; building an initial solar power station model; and analyzing and calculating shade after the model is built. In the method, according to the influence of terrain, buildings and other obstacles constructed by humans on a solar power module, optimal arrangement of the solar power module is achieved to ensure scientific layout and maximize conversion efficiency of the solar power module.

The present invention discloses an integrated voltage regulator comprising a switching regulation and an additional regulation mechanism. The additional regulation mechanism permits better control of the voltage regulator to enable improved performance. The present invention integrated voltage regulator provides an output voltage Vout in the formVout=(Vin−Vamp)*(Duty Cycle)−Vslewwhere the additional regulation mechanism comprises an amplitude modulation Vamp to modulate the input voltage Vin, a slew rate modulation Vslew to modulate the output voltage Vout, or a combination of amplitude modulation and slew rate modulation.

A wavelength conversion member includes: a first wavelength converter containing a first wavelength converting material; a second wavelength converter containing a second wavelength converting material different from the first wavelength converting material; a first container member providing a space for accommodating the first wavelength converter; and a second container member facing the first container member and providing a space for accommodating the second wavelength converter. The first container member and the second container member may be at least partially fusion-bonded with each other.

Methods of operating a frequency-converted laser source are disclosed. According to particular disclosed embodiments, a laser diode is driven in a pulsed mode to define pixel intensity values corresponding to desired gray scale values of image pixels in an image plane of the laser source. The pixel intensity values are a function of a laser control signal comprising a discontinuous pulse component, a relatively constant intensity component I, and a continuously variable intensity component I*. The pulse width w of the discontinuous pulse component is selected from a set of discrete available pulse widths according to a desired pixel gray scale value. A low-end pulse width w of the set of available pulse widths is established for a range of low-end pixel gray scale values and progressively larger pulse widths w are established for ranges of progressively higher pixel gray scale values. The relatively constant intensity component I makes a relatively insignificant contribution to pixel intensity at the low-end pulse width w for the range of low-end pixel gray scale values and assumes a non-zero value for enhanced conversion efficiency at the progressively larger pulse widths w established for the higher pixel gray scale values. The continuously variable intensity component I* varies according to the desired gray scale value of the selected pixel and the contributions of the relatively constant intensity component I and the pulse width w to pixel intensity.

The application provides a resonant frequency tracking system and method for a giant magnetostrictive transducer. A compensation circuit and an electrical signal sampling circuit are connected in series in a loop of the resonant frequency tracking system of the giant magnetostrictive transducer. The electrical signal sampling circuit measures and collects an electrical signal as sampling data andreturns the sampling data to the computer for processing through a data interface. According to the resonant frequency tracking system, real-time tracking of resonant frequencies of the giant magnetostrictive transducer is realized by setting relevant parameters such as a tracking increment, a tracking decrement, and an acquisition threshold. When a frequency drift of the resonant frequency tracking system of the giant magnetostrictive transducer is caused by a load change or a temperature rise change, tracking is carried out within a parameter range of tracking accuracy and tracking sensitivity by using the resonant frequency tracking system and method, so that energy conversion efficiency maximization is realized.

According to one aspect of the present disclosure, there is provided an apparatus that includes first, second, and third power converter stages connected to a transformer module. At least one of the first, second, and third power converter stages is a multi-level power converter stage that has multiple configurations to generate different output voltages from an input voltage.

A wavelength-converted light emitting diode (LED) chip is provided. The wavelength-converted LED chip includes an LED chip and a wavelength-converted layer. The LED chip emits light in a predetermined wavelength region. The wavelength-converted layer is formed of a resin containing phosphor bodies of at least one kind which convert a portion of the light emitted from the LED chip into light in a different wavelength region. The wavelength-converted layer is formed on an upper surface of the LED chip, and has a convex meniscus-shaped upper surface.

An energy harvest terminal includes a distribution circuit that distributes input radio wave power to at least two branch paths, a main rectification circuit that converts first radio wave power supplied to one of the at least two branch paths from the distribution circuit into DC output power, a DC-DC converter that performs voltage conversion on the DC output power of the main rectification circuit, a sub-rectification circuit that converts second radio wave power supplied to another of the at least two branch paths from the distribution circuit into DC output power, and an electricity storage device connected to an output of the DC-DC converter. The DC-DC converter performs a feedback control for equalizing an output voltage of the main rectification circuit and an output voltage of the sub-rectification circuit.

The present invention discloses an integrated voltage regulator comprising a switching regulation and an additional regulation mechanism. The additional regulation mechanism permits better control of the voltage regulator to enable improved performance. The present invention integrated voltage regulator provides an output voltage Vout in the formVout=(Vin−Vamp)*(Duty Cycle)−Vslewwhere the additional regulation mechanism comprises an amplitude modulation Vamp to modulate the input voltage Vin, a slew rate modulation Vslew to modulate the output voltage Vout, or a combination of amplitude modulation and slew rate modulation.

The invention relates to an environment-friendly steam energy hot water production technology. According to the environment-friendly steam energy hot water production technology, ejected steam pushes water to form eddy in a heating tank. The steam is effectively recycled, and air pollution is avoided to a certain degree. The steam is effectively recycled, meanwhile, the eddy is formed through the steam, the eddy can obviously save the use amount of the steam when the water is heated, and the conversion efficiency of heat energy is maximized. Through a water quality purification device, the water scale in the heating tank is reduced, output hot water is made to directly conform to the standard of domestic water, the water is heated through the steam, and steam energy is converted into the hot water.

The invention discloses an angle direction adjustable solar panel. The angle direction adjustable solar panel comprises a solar panel body, a body support, a rotating disc and a rotation motor, wherein the lower end of the solar panel body is provided with an installation rod, the installation rod is rotationally installed on an installation seat arranged on the body support in a cooperating manner, the body support is fixed on the rotating disc, the rotating disc is also provided with a driving motor used for driving the solar panel body to rotate, the rotating shaft of the driving motor is wound with a connection chain, the two ends of the connection chain are respectively connected with the front end and the rear end of the solar panel body, the rotation motor driving the rotating disc to rotate is connected below the rotating disc, the rotation motor is installed in a motor installation seat, the rotation motor installation seat is also provided with a control panel, and the control panel is electrically connected with the driving motor and the rotation motor. The solar panel provided by the invention realizes multi-direction and multi-angle adjustment, ensures that the solar panel is always right oriented towards the sun and improves the generating efficiency of the solar panel.

The present invention relates to a photovoltaic power generation system performing maximum power point tracking for each unit group which performs separate maximum power point tracking for each photovoltaic string, maximizes the inversion efficiency of an inverter by maintaining uniform input voltage from the inverter regardless of the difference between generated energy and generated voltage for each photovoltaic string, and thus improves the photovoltaic power generation efficiency. A photovoltaic power generation system performing maximum power point tracking for each unit group according to the present invention comprises: a plurality of photovoltaic strings formed by connecting a plurality of photovoltaic modules; a string optima for converting voltage generated from each of the plurality of photovoltaic strings into an output voltage of a uniform size, and controlling, for the conversion of the generated voltage, the maximum power point tracking for each photovoltaic string; and an inverter for converting the output voltage from the string optima into alternating voltage and supplying the power system therewith.

The invention relates to an environment-friendly steam energy hot water production system. The environment-friendly steam energy hot water production system comprises a heating tank; a steam heating device is arranged in the heating tank; the steam heating device is used for ejecting the steam and pushing the water to form vortexes in the heating tank. According to the environment-friendly steam energy hot water production system, the steam is effectively recycled and accordingly the air pollution is avoided to a certain extent; the vortexes are formed through the steam when the steam is effectively recycled and accordingly the water can be significantly heated, meanwhile the steam is saved, and the conversion efficiency of the heat energy is maximized; the scale in the heating tank is reduced and the output hot water can directly meet the standard of the domestic water through a water quality purification device, the water is heated through the steam, and the steam energy is converted into the hot water.

A sound reproducing screen for an ultrasonic converting and reproducing method wherein a sound signal is carried on the ultrasonic wave which is transmitted via the screen which has a lattice structure in which a plurality of cells is continuously arranged. Using the screen, the sound signal can be divided from the ultrasonic wave, so that the sound signal can be reproduced. A cell structure of the screen is thus provided for converting the ultrasonic wave into the sound signal by ultrasonic conversion and reproduction which is simple to make and which has a maximum conversion efficiency. Accordingly, an efficiency of reproducing the sound source in a low frequency band as well as a high frequency band is superior, and a realistic three-dimensional sound system can be implemented.

The invention relates to an all-wind-direction combined multi-power permanent magnetic wind power generator which solves the problem that a set of a traditional impeller type wind generator cannot normally run, and the electric energy conversion efficiency is low due to influences of random changes of wind directions and speeds. An axial magnetic coupling reducer of the all-wind-direction combined multi-power permanent magnetic wind power generator is fixed at the top of a basic tower, a rotary shaft of a kinetic energy conversion device is sleeved on a moment input shaft of the axial magnetic coupling reducer, and a moment output shaft of the axial magnetic coupling reducer is fixedly connected with moment input shafts of a plurality of power permanent magnetic generators. The plurality of power permanent magnetic generators are arranged in the basic tower and connected in series. The kinetic energy conversion device comprises three semi-circle spherical surface blades, three connection rods and a rotary shaft sleeve, wherein the three semi-circle spherical surface blades are respectively connected with the rotary shaft sleeve through the three connection rods which are in the same plane and are distributed evenly along the peripheral direction. The all-wind-direction combined multi-power permanent magnetic wind power generator is suitable for the field of wind power generation.

The present invention relates to a display device, and particularly, to a display device using a semiconductor light emitting device. The display device includes a substrate including an electrode, a plurality of light emitting devices assembled on the substrate, and a color conversion part stacked on the plurality of semiconductor light emitting devices and converting a color. Specifically, the color conversion part includes: a porous layer, a wavelength conversion layer, and a reflective layer, wherein the wavelength conversion layer is disposed between the porous layer and the reflective layer, and the porous layer is formed of an electro-polishable porous terminal. A surface of the reflective layer includes a first region and a second region surrounded by the first region, the second region has roughness higher than that of the first region, and a plurality of first protrusions are disposed in the second region.

The present invention discloses an integrated voltage regulator comprising a switching regulation and an additional regulation mechanism. The additional regulation mechanism permits better control of the voltage regulator to enable improved performance. The present invention integrated voltage regulator provides an output voltage Vout in the formVout=(Vin−Vamp)*(Duty Cycle)−Vslewwhere the additional regulation mechanism comprises an amplitude modulation Vamp to modulate the input voltage Vin, a slew rate modulation Vslew to modulate the output voltage Vout, or a combination of amplitude modulation and slew rate modulation.

Provided is a maximum power tracking device. The device includes: a battery outputting a first power; a switching unit changing the first power into a second power in response to a switching control signal; and a pulse modulation generation unit adjusting a pulse width of the switching control signal on the basis of the first power and adjusting a frequency of the switching control signal on the basis of the first power and the second power.

Devices and methods for safely using acid / chlorite ClO2 generator chemistry for water treatment, whereby a valve prevents chemical draw unless there is both vacuum within the reaction chamber as well as suitable water volume in the flow chamber for dilution, are described. The float-dependent valve can also allow for direct venting from the reaction chamber to the flow chamber in the event of elevated pressure in the reaction chamber. This approach delivers an inherently safer ClO2 generator design for systems that utilize high strength reactor zones with ClO2 concentration above 3,000 ppm.

The present invention provides for an organic compound comprising electron deficient unit covalently linked to two or more electron rich units. The present invention also provides for a device comprising the organic compound, such as a light-emitting diode, thin-film transistor, chemical biosensor, non-emissive electrochromic, memory device, photovoltaic cells, or the like.

The invention discloses a power generation device used for a high-rise residential building. The device comprises a machine body, and side wing blocks are bilaterally symmetrically arranged on the upper side of the body; side wing cavities are formed in the side wing blocks; bevel gear cavities are formed in the side wing blocks; lifting cavities are formed in the lower sides of the bevel gear cavities; and water storage cavities are formed in the lower sides of the lifting cavities; when a transmission motor rotates reversely, electromagnets at the upper side are powered off through a controlwire, and therefore, the two electromagnets repel each other; when the solar panel is installed on the roof of the high-rise residential building, the solar panel can be normally used for a power system in a public area of the residential building, and the normal use of an emergency power system and an elevator of the residential building can be guaranteed when the high-rise residential buildingis powered off due to faults.