1277results about How to "Efficient power" patented technology

A vehicle lighting system for a vehicle includes an accessory module assembly that is adapted for attachment to an interior portion of a vehicle and configured to illuminate, for example, an area inside the vehicle. The module assembly includes a single high-intensity power light emitting diode that has a luminous efficiency of at least about 1 lumen per watt when the light emitting diode is operated and is preferably operated at a forward current of at least 100 milliamps. The system also includes a voltage conversion element for converting the battery/ignition voltage of the vehicle to the forward operating voltage of the light emitting diode.

An inductive power supply system for providing power to one or more inductively powered devices. The system includes a mechanism for varying the physical distance or the respective orientation between the primary coil and secondary coil to control the amount of power supplied to the inductively powered device. In another aspect, the present invention is directed to an inductive power supply system having a primary coil and a receptacle disposed within the magnetic field generated by the primary coil. One or more inductively powered devices are placed randomly within the receptacle to receive power inductively from the primary coil. The power supply circuit includes circuitry for adjusting the power supplied to the primary coil to optimize operation based on the position and cumulative characteristics of the inductively powered device(s) disposed within the receptacle.

An inductive power supply system for providing power to one or more inductively powered devices. The system includes a mechanism for varying the physical distance or the respective orientation between the primary coil and secondary coil to control the amount of power supplied to the inductively powered device. In another aspect, the present invention is directed to an inductive power supply system having a primary coil and a receptacle disposed within the magnetic field generated by the primary coil. One or more inductively powered devices are placed randomly within the receptacle to receive power inductively from the primary coil. The power supply circuit includes circuitry for adjusting the power supplied to the primary coil to optimize operation based on the position and cumulative characteristics of the inductively powered device(s) disposed within the receptacle.

A multi-mode multi-coupling multi-protocol wireless power transmitter (WPT) and its embodiments transmit power to a wireless power receiver (WPR) in a power transfer mode (PTM) and a wireless power protocol (WPP) of the WPR. A first circuit of the WPT includes inductors or capacitors emanating power via a magnetic field or electric field PTM respectively. The WPT sequentially parses a test condition to identify a PTM, a power coupling linkage (PCL) between the WPT and the WPR, and a WPP of the WPR. The WPT identifies a match if the PTM of the first circuit and the WPP of the switch network, the variable matching circuit, a modulator/demodulator block or an out-of-band communication block, and a control logic circuit of the WPT match the PTM and the WPP of the WPR to transmit power to the WPR based on the match.

A wireless power transmission system includes a receiver and a transmitter. The transmitter includes: a power transmission unit that transmits power; a power adjustment unit that adjusts power to be transmitted; and a communication unit. The receiver includes: a power receiving unit that receives power; a power detection unit that detects the received power; a power storage unit that stores the received power; and a communication unit. The power to be transmitted is adjusted on the basis of power transmission efficiency and the remaining energy storage level. The power transmission efficiency is the ratio between the transmitted power and the received power.

A power and control architecture employing circuitry that sequentially regulate power flows from independent solar-array sources or a mixture of power sources providing power to a common load. The device may be used on a satellite with solar-array sources; however it may also be used on ground based systems. Stiff bus voltage regulation is obtained by tightly controlling the most recently activated power-processing channel while keeping the previously activated power-processing channels in the Maximum Power Tracking mode to supply maximum power to a common load. The remaining power-processing channels are turned off or operated in stand-by mode. In an alternative system, with primary design goal of uniform power sharing among solar-array sources, all solar array sources are activated with uniform power sharing at light load and, as load demand increases, sequentially controlled to operate in the Maximum Power Tracking mode one solar array source at a time as necessary.

The present invention relates to a wireless power transmission network and to a wireless power transmission method. In the wireless power transmission method according to one aspect of the present invention, a base station, which wirelessly transmits power using a magnetic field, performs in-band communication through the magnetic field used for wireless power transmission in order to determine whether an electronic device receiving power is in a charging area or in a communication area, and transmits wireless power accordingly.

An inductive power transfer system including a synchronous drive system having a resonance control module. The resonance control module includes a primary coil module with a primary LC circuit. The resonance control module seeks and detects the resonant frequency of the primary LC circuit. The synchronous drive system further includes a switching coil amplifier for selectively energizing the primary coil to keep the primary LC circuit operating at or as close as possible to its natural resonant frequency. The inductive power transfer system may further include a secondary receiving unit. The secondary receiving unit includes a secondary LC circuit coupled with the primary LC circuit for inductively receiving power. The secondary LC circuit includes an LC filter and a rectifier unit for operating the secondary LC circuit at a mutual resonance with the primary LC circuit.

A computing device is operable to work in conjunction with a companion electronic device. The computing device and the companion electronic device each have their own electronics and/or own operating system and each is able to construct a partial or complete user environment. The computing device is operable to send data to the companion device, on request of the companion device, which the companion electronic device then uses to locally construct its own user environment, in whole or in part.

Disclosed is a method for uplink scheduling in a communication system. The method for uplink scheduling in a communication system having a cellular structure hopping between sub-channels according to a predetermined rule whenever a signal is transmitted The communication system dividing a whole frequency band into a plurality of sub-carrier bands and including the sub-channels which are sets of the sub-carrier bands. The method includes determining a number of sub-channels to be allocated to a mobile station such that throughput of the mobile station is maximized based on a first predetermined condition in which a mobile station having a superior channel state is allocated with a greater number of sub-channels than a mobile station having an inferior channel state, and determining a modulation and coding scheme level according to a signal-to-interference and noise ratio (SINR) of a downlink channel reported by the mobile station based on a second predetermined condition capable of improving a channel state of the mobile station having an inferior channel state.

A method for communicating a plurality of data streams between a transmitting device with multiple transmit antennas and a receiving device, is disclosed. The method comprises determining a set of power weightings, efficiently quantizing the power weightings, and providing the set of power weightings the transmitting device. Another aspect of the invention comprises the transmitter implicitly signaling the number of data streams which the receiver should feedback information for through the amount of feedback requested. An additional aspect of the invention is a means of determining the best codebook weights by combining the maximum power and maximum capacity criteria.

Disclosed herein is an electric power supplying apparatus, including: a resonance circuit having an inductance and a capacitance; and an electric power synthesizing circuit configured to synthesize electric powers of electric signals composed of a plurality of frequency components in a neighborhood frequency band as a frequency band near a resonance frequency decided by the inductance and the capacitance with one another, and output a resulting electric signal obtained through the electric power synthesis to the resonance circuit.

An automated audio tuning system may optimize an audio system for power efficiency when performing automated tuning of the audio system to optimize acoustic performance. The system may establish any number of different power efficiency weighting factors to provide a balance between acoustic performance and power efficiency during operation. The power efficiency weighting factors may range from representing optimizing power efficiency with constrained optimization of acoustic performance to optimized acoustic performance with minimized regard for power efficiency. For each of the efficiency weighting factors, the system may generate operational parameters, such as filter parameters, to achieve a target acoustic response while maintaining a determined level of power efficiency.

A LED driving apparatus includes a rectifying circuit 2, first, second and third blocks 11, 12 and 13, and first and second switching portions. The rectifying circuit 2 is connected to AC power supply, and rectifies AC voltage of the AC power supply to provide pulsating current voltage. Each block includes a plurality of LEDs. The first, second and third blocks 11, 12 and 13 are serially connected to the output side of the rectifying circuit 2. The first switching portion switches ON/OFF of a first bypass path BP1 based on flowing current amount in the first block 11. The first bypass path BP1 bypasses the second block 12. The second switching portion switches ON/OFF of a second bypass path BP2 based on flowing current amount in the first and second blocks 11 and 12. The second bypass path BP2 bypasses the third block 13.

A method for associating file activity of an application with the graphical display of the file on a screen comprises loading by an operating system an executable code of a message monitoring program adapted to monitoring a message sent by an operating system to a document display window. The message monitoring program establishes a system-wide window hook using available operating system API functions associated with one or more functions in a library of the message monitoring program. The message monitoring program library is loaded into the memory space of a newly started application program, the import table of the application is fixed with addresses of functions from the message monitoring program library, and the application's main window function is substituted with a message monitoring program window function.

The invention relates to automatic eye tracking, wherein at least one imaging device (150) registers sequential image data (D_EYE) representing at least one eye (181; 182) of a subject (180). A processing unit (170) receives the image data (D_EYE), and based thereon, produces a position estimate of the at least one eye (181; 182). The processing unit (170) also produces a control signal (D_ILL)>which is received by at least one light source (140). The at least one light source (140), in turn, emits at least one light beam (L) being variable, such that a spatial location of an illumination area (A_ILL) towards which at least one light beam (L) is directed depends on the characteristics of the control signal (C_ILL). Specifically, the processing unit (170) produces the control signal (C_ILL) so that the illumination area (A_ILL) includes a position estimate of the at least one eye (181; 182).

A digital polarimeteric system employs a signal time stretching technique and digital signal processing of the time-stretched signal to accurately measure the polarization of a received RF signal with commercially available digital hardware. A superheterodyne receiver down converts received RF signal components to IF, and analog-to-digital converters sample the signal components at much lower sampling rates than would normally be required to accurately measure the signal polarization. Each signal sample is “time stretched” by storing each sample in M locations in a memory, such that N samples occupy M×N memory locations. A digital signal processor applies incremental phase shifts to the digital samples until a phase-shifted combination of the digital samples yields a minimum null output. The phase shifts producing the minimum null identify the polarization of the received signal. The stretching and digital processing yield the required number of samples per cycle of the received signal for accurate polarization measurement, thus effectively increasing the digital sampling frequency. Because each sample is stored in M memory locations, each incremental phase shift corresponds to 1/M^th of the actual sampling interval, thereby providing the high phase resolution required to accurately measure polarization.

An electric power transmission system includes: a transmitting-side system that includes switching elements that convert a direct-current voltage to an alternating-current voltage and that output the alternating-current voltage and a transmitting-side magnetic resonance antenna unit that has a first inductor and a first capacitor directly coupled to each other and to which the output alternating-current voltage is input; and a receiving-side system that includes a second inductor and a second capacitor directly coupled to each other and that resonates with the transmitting-side magnetic resonance antenna unit via electromagnetic field to thereby receive electric energy output from the transmitting-side magnetic resonance antenna unit.

A conference call solution with one or more conference server, one or more conference bridge and one or more media mixer. A conference server is chosen as the conference bridge for the conference call using various optimization techniques. A media mixer for the conference call may also be chosen using various optimization techniques. The media mixer mixes media data from one or more conference bridge. If a conference bridge or the media mixer fails, the system recovers from the failure with minimal interruption to the users.

A portable mechanical ventilator having a Roots blower is configured to provide a desired gas flow and pressure to a patient circuit. The mechanical ventilator includes a flow meter operative to measure gas flow produced by the Roots blower and an exhalation control module configured to operate an exhalation valve connected to the patient circuit. A bias valve connected between the Roots blower and the patient circuit is specifically configured to generate a bias pressure relative to the patient circuit pressure at the exhalation control module. The bias valve is further configured to attenuate pulsating gas flow produced by the Roots blower such that gas flowing to the mass flow meter exhibits a substantially constant pressure characteristic. The bias pressure facilitates closing of the exhalation valve at the start of inspiration, regulates positive end expiratory pressure during exhalation, and purges sense lines via a pressure transducer module.