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Duty Cycle patents

      

This page is updated frequently with new Duty Cycle-related patent applications.




 Apparatus and  efficient two-way optical communication where transmitter may interfere with receiver patent thumbnailnew patent Apparatus and efficient two-way optical communication where transmitter may interfere with receiver
A two-way optical communication apparatus includes a transmit element, a receive element and a transceive processor. The transmit and receive elements are coupled to a light pipe, and configured to transmit a first optical signal and receive a second optical signal, respectively.
Google Inc.


 System and  soft switching power inversion patent thumbnailnew patent System and soft switching power inversion
A power inversion system includes an input and output coupleable to a dc power and an ac load, respectively, and a power inverter including a plurality of phase legs each having two bridge legs coupled in parallel with at least two switch and antiparallel diode pairs coupled in series. The system also includes a plurality of inductors, with at least one inductor coupled between a midpoint of each bridge leg and an lcl filter, the inductors in each phase leg being magnetically coupled.
General Electric Company


 Multilevel multistate voltage regulator patent thumbnailnew patent Multilevel multistate voltage regulator
A voltage regulator provides a regulated output voltage [108] from an input voltage [100] using control unit [106] to control a switched capacitor circuit [102] to periodically produce different output voltage levels vx followed by a low pass filter [104] to give a regulated output voltage. Phase interleaving is used where the phases of different voltage levels are interleaved allowing for increased effective switching frequency and reduced switching losses.
The American University In Cairo


 Tunable wireless power architectures patent thumbnailnew patent Tunable wireless power architectures
Described herein are improved configurations for a wireless power transfer. The parameters of components of the wireless energy transfer system are adjusted to control the power delivered to the load at the device.
Witricity Corporation


 Apparatus and  image rendering based on white point correction patent thumbnailnew patent Apparatus and image rendering based on white point correction
Systems, methods and apparatus, including computer programs encoded on computer storage media, of this disclosure allow for forming an image frame on a display device. In one aspect, a controller associated with a display device can be configured to correct for output white point shift due to variation, across separate color subfields of an image frame, in the respective number of subframes or the respective subframe weights.
Pixtronix, Inc.


 Weapon mounted light and operation thereof patent thumbnailnew patent Weapon mounted light and operation thereof
A flashlight assembly includes a bistable safety bail to prevent inadvertent depression of an operational push button switch. The flashlight assembly further includes a bistable pivoting mode selection lever which controls operational modes of the flashlight.
Emissive Energy Corp.


 Lock device and associated method, computer program and computer program product patent thumbnailnew patent Lock device and associated method, computer program and computer program product
It is presented a lock device comprising: a controller configured to determine whether to open the lock device, wherein the controller is configured to provide an open signal when the lock device it to be opened, the open signal being a pulsating signal; a motor controllable to set the lock device in an open state or a closed state; and a motor driver connected between the controller and the motor, the motor driver comprising a capacitor providing a capacitive coupling between the controller and the motor, the motor driver being configured to provide a motor control signal to the motor to set the lock device in an open state only when a duty cycle of the open signal is less than a threshold duty cycle.. .
Assa Abloy Ab


 Methods and apparatus to deliver therapeutic non-ultraviolet electromagnetic radiation to a body surface patent thumbnailnew patent Methods and apparatus to deliver therapeutic non-ultraviolet electromagnetic radiation to a body surface
A flexible, therapeutic wound dressing assembly is provided for placement on or in a patient, to absorb biological fluids, to protect a wound, and to deliver therapeutic electromagnetic radiation (emr) to the patient. The therapeutic wound dressing assembly comprises a wound dressing with at least an optical layer and an outer protective layer and an emr delivery system with at least one emr source that emits non-ultraviolet, therapeutic emr having intensity sufficient to activate desired therapeutic properties within the patient, at least one electronic module that controls emr output the emr sources.

 System and process for neuroprotective therapy for glaucoma patent thumbnailnew patent System and process for neuroprotective therapy for glaucoma
Providing neuroprotective therapy for glaucoma includes generating a micropulsed laser light beam having parameters and characteristics, including pulse length, power, and duty cycle, selected to create a therapeutic effect with no visible laser lesions or tissue damage to the retina. The laser light beam is applied to retinal and/or foveal tissue of an eye having glaucoma or a risk of glaucoma to create a therapeutic effect to the retinal and/or foveal tissue exposed to the laser light beam without destroying or permanently damaging the retinal and/or foveal tissue and improve function or condition of an optic nerve and/or retinal ganglion cells of the eye..
Ojai Retinal Technology, Llc


 Switched mode power supply, base station, and  operating a switched mode power supply patent thumbnailSwitched mode power supply, base station, and operating a switched mode power supply
A switched mode power supply comprising a switched mode converter and a controller for controlling the switched mode converter, the switched mode converter being provided for converting an input voltage to an output voltage and including, on a primary side, a primary winding and a controllable switch based circuitry connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding coupled to the primary winding and a capacitive element connected over the secondary winding, wherein the output voltage is obtained as the voltage over the capacitive element. The primary winding comprises a first winding portion and at least one further winding portion and the switch based circuitry comprises controllable switches capable of controlling the duty cycle of the switched mode converter and capable of switching between a first operation state wherein the input voltage is connected only over the first winding portion and at least a second operation state wherein the input voltage is connected over the first and the at least one further winding portions, thereby enabling switching between two different transformer ratios.
Telefonaktiebolaget L M Ericsson (publ)


Electrostatic mass spectrometer with encoded frequent pulses

A method, apparatus and algorithms are disclosed for operating an open electrostatic trap (e-trap) or a multi-pass tof mass spectrometer with an extended flight path. A string of start pulses with non equal time intervals is employed for triggering ion packet injection into the analyzer, a long spectrum is acquired to accept ions from the entire string and a true spectrum is reconstructed by eliminating or accounting overlapping signals at the data analysis stage while using logical analysis of peak groups.
Leco Corporation

Memory components and controllers that calibrate multiphase synchronous timing references

A first timing reference signal and a second timing reference signal are sent to a memory device. The second timing reference signal has approximately a quadrature phase relationship with respect to the first timing reference signal.
Rambus Inc.

Microfluidic devices with integrated resistive heater electrodes including controlling and measuring the temperatures of such heater electrodes

The invention relates to methods and devices for control of an integrated thin-film device with a plurality of microfluidic channels. In one embodiment, a microfluidic device is provided that includes a microfluidic chip having a plurality of microfluidic channels and a plurality of multiplexed heater electrodes, wherein the heater electrodes are part of a multiplex circuit including a common lead connecting the heater electrodes to a power supply, each of the heater electrodes being associated with one of the microfluidic channels.
Canon U.s. Life Sciences, Inc.

Apparatus, power management in mobile devices

An apparatus, system and method for determining whether a battery alarm of a ue is asserted, reducing a transmission duty cycle of the ue to zero for a first predetermined time period when the battery alarm is asserted, determining whether the battery alarm has been de-asserted after the first predetermined time period and when the battery alarm has not been de-asserted, increasing the transmission duty cycle to a first threshold level for a second predetermined time period, wherein the first threshold level is less than a full transmission duty cycle of the ue. When the battery alarm has been de-asserted, increasing the transmission duty cycle to a second threshold level for a third predetermined time period, wherein the second threshold level is less than the full transmission duty cycle of the ue, and wherein the second threshold level is greater than the first threshold level..
Apple Inc.

Single-shunt current sensing for multi-phase motor

A motor controller for providing a three-phase alternating current (ac) signal to a three-phase motor. The motor controller uses current feedback from a single shunt to monitor or control the three phase ac signal.
Nidec Motor Corporation

Systems and methods for output current regulation in power conversion systems

Systems and methods are provided for regulating a power converter. An example system controller includes: a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period.
On-bright Electronics (shanghai) Co., Ltd.

Method of controlling power conversion apparatus, and power conversion apparatus

A method of controlling switching primary and secondary full-bridge circuits, includes, when a fault is detected in a first voltage detection unit that detects the voltage of a first port, deriving a command duty cycle to adjust the voltage of a second port to a target voltage, by receiving feedback of a detected voltage of the second port by a second voltage detection unit; deriving an estimated phase difference corresponding to target power of transmission power transmitted from the secondary full-bridge circuit to the primary full-bridge circuit, and the command duty cycle, from a correspondence relation among a phase difference between switching of the primary and secondary full-bridge circuits, a duty cycle of the switching of the primary full-bridge circuit, and the transmission power; and controlling the phase difference to the estimated phase difference, and controlling the duty cycle to the command duty cycle.. .
Toyota Jidosha Kabushiki Kaisha

Systems and methods for output current regulation in power conversion systems

Systems and methods are provided for regulating power conversion systems. A system controller includes: a first controller terminal configured to receive a first signal related to an input signal for a primary winding of a power conversation system; and a second controller terminal configured to output a drive signal to a switch to affect a current flowing through the primary winding, the drive signal being associated with a switching period including an on-time period and an off-time period.
On-bright Electronics (shanghai) Co., Ltd.

Systems and methods for output current regulation in power conversion systems

Systems and methods are provided for regulating a power converter. An example system controller includes: a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period.
On-bright Electronics (shanghai) Co., Ltd.

Apparatus for performing multi-loop power control in an electronic device with aid of analog compensation and duty cycle selection, and associated method

An apparatus for performing multi-loop power control in an electronic device is provided, where the apparatus may include at least one portion (e.g. A portion or all) of the electronic device.
Mediatek Inc.

Backlight brightness adjustment method and apparatus

Disclosed are a backlight brightness adjustment method and apparatus. The backlight brightness adjustment method includes the following steps: dividing a backlight area of a liquid crystal display (lcd) into multiple sub-areas, acquiring maximum pixel brightness m of each sub-area, and acquiring average pixel brightness a according to the maximum pixel brightness m; classifying the brightness into multiple brightness ranges, and separately adjusting duty cycles and drive currents of a backlight source in different brightness ranges according to the average pixel brightness a and the maximum pixel brightness m; determining, according to the maximum pixel brightness m of each sub-area, a brightness range of the sub-area, and acquiring an adjusted duty cycle and drive current that correspond to the brightness range of each sub-area; and correspondingly controlling illumination brightness of each sub-area by using the adjusted duty cycle and drive current.
Shenzhen Skyworth-rgb Electronic Co., Ltd.

Power stealing for a wireless-enabled thermostat

Disclosed are exemplary embodiments of apparatus, systems and methods for power stealing for a wireless-enabled thermostat. In an exemplary embodiment, a wireless-enabled thermostat generally includes a control having a wireless network interface that intermittently connects the thermostat in a wireless network in accordance with a duty cycle, the duty cycle having a connect time in which the thermostat is connected in the wireless network and a sleep time in which the thermostat is not connected in the wireless network.
Emerson Electric Co.

Method and thermal conductivity detector

A thermal conductivity detector includes a heatable resistive detector configured to be physically arranged in an analytes flow eluting from a chromatography column and electrically arranged with resistors in separate arms of a measuring bridge, an amplifier which detects differential voltage between two opposite nodes of the bridge and applies an output voltage to other opposite nodes of the measuring bridge to maintain the detector at a constant operating temperature, and an additional resistor with a controllable switch in parallel connected in series with the detector or resistor arranged in one arm of the bridge, where the switch is periodically turned on and off at a predetermined duty cycle and/or controlled by information on characteristic times-of-arrival of analytes at the detector to compensate for operating temperature uncertainties due to manufacturing variations of the resistors and/or to allow for processing small and large peaks of a chromatogram with highest available resolution.. .
Siemens Aktiengesellschaft

Fiber coupled integrating sphere based-laser energy meter and calibration system (fcis based - lemcs) traceable to primary level standards

The averaged pulse energy (j) of a pulsed type laser source can be measured by several types of commercial laser energy meters, such as pyroelectric detector or thermopile sensor, the spectral responsivity and the time/frequency related response properties of which are compatible with those of the pulsed type laser source. These commercial laser energy meters, regardless of sensor/detector type, should be calibrated against the working standards calibrated in a national (or an international) traceability chain relying on primary standards on the highest level having the lowest uncertainty in realizations of the fundamental si units.
Tubitak (turkiye Bilimsel Ve Teknolojik Arastirma Kurumu)

Online igbt junction temperature estimation without the use of a dedicated temperature estimation or measurement device

A number of variations may include a method which may include determining a temperature rise in an igbt junction without the use of a temperature estimation or measurement device because determination may be made by first determining the power loss due to the conduction losses of the igbt and power loss associated with switching the igbt where these losses may be determined by utilizing the saturation voltage of the igbt, igbt pwm duty cycle, igbt switching frequency, fundamental frequency along with a lookup table for the switching energies and the phase current going through the igbt. The determined power loss may be multiplied by a measured, sensed or obtained thermal impedance from the igbt junction.
Gm Global Technology Operations Llc

Renal injury inhibiting devices, systems, and methods employing low-frequency ultrasound or other cyclical pressure energies

Improved devices, systems, and methods treatment of patients can be used to help mitigate injury to the kidneys by applying cyclical mechanical pressure energy at low intensities. The energy often be selectively directed from non-invasive transducers disposed outside the patients.
Sonogenix, Inc.

Device and controlling an electrical heater to limit temperature

There is provided a method of controlling an electrical heating element, including maintaining a temperature of the heating element at a target temperature by supplying pulses of electrical current to the heating element; monitoring a duty cycle of the pulses of electrical current; and determining if the duty cycle differs from an expected duty cycle or range of duty cycles, and if so, reducing the target temperature, or stopping the supply of current to the heating element or limiting the duty cycle of the pulses of electrical current supplied to the heating element. As the temperature is maintained at a known target temperature, any variation in the duty cycle or range of duty cycles expected to maintain the target temperature is indicative of abnormal conditions..
Philip Morris Products S.a.

Light dimming for alleviating inter-frame flicker

Provided are a light dimming method for alleviating inter-frame flicker and dimming device. The light dimming method includes that: an average luminance value avgdata when a sender sends physical frames is calculated; whether inter-frame flicker is generated when the sender sends data or not is judged according to a ratio of avgdata to an average luminance value avglight in an illumination state; and if the inter-frame flicker is generated when the sender sends the data, the sender inserts a dimming frame in an idle pattern, wherein the dimming frame is used for compensating for a luminance difference between avgdata and avglight.
Zte Corporation

High efficiency class d amplifier with reduced generation of emi

A class-d amplifier includes a signal processing block. The signal processing block generates a first processed signal representing a difference between a first differential signal and a second differential signal, when a duty cycle of the first differential signal is greater than that of the second differential signal.
Stmicroelectronics (shenzhen) R&d Co. Ltd

Load control by adaptive duty cycling

An adaptive load control system and method are provided. A rolling table is utilized to collect duty cycle information of an electrical appliance during defined time periods.
Energate Inc.

Center pivot irrigation system with pressure and location based flow and placement control

A center pivot irrigation system is described that includes a controller that makes use of a particular flow rate of input water to deliver a consistent depth of irrigation to user-defined areas under a pivot irrigator. The controller operates to pulse control valves for the nozzles/sprinkler heads on and off as the sprinkler arm rotates.
Trimble Navigation Limited

Lighting device and illumination apparatus

A lighting device which outputs a current to a solid-state light emitting element includes: a direct current-to-direct current (dc-to-dc) converter; and an output detector which detects an output from the dc-to-dc converter, wherein the dc-to-dc converter includes: a switching element; a control device which controls the switching element in order to generate the output; and a current detector which detects a current which flows through the switching element, and if a current value of the current detected by the current detector is less than a predetermined threshold, the control device controls the switching element according to a duty cycle determined based on an output value of the output detected by the output detector, and if the current value is greater than the predetermined threshold, the control device controls the switching element according to a duty cycle lower than the duty cycle determined based on the output value.. .
Panasonic Intellectual Property Management Co., Lt

Wireless network for sensor array

A linear wireless sensor network includes network nodes having monotonically varying network node identifiers along each branch of the network. The network identifiers enable the nodes to forward network packets without use of routing tables.
The Charles Stark Draper Laboratory, Inc.

Wireless network for sensor array

A linear wireless sensor network includes network nodes having monotonically varying network node identifiers along each branch of the network. The network identifiers enable the nodes to forward network packets without use of routing tables.
The Charles Stark Draper Laboratory, Inc.

Effecting change to transmit duty cycle of wlan transceiver

An apparatus has a wireless local area network (wlan) transceiver and one or more sensors. The sensors are monitored.
Blackberry Limited

Techniques for controlling engine speed based on alternator duty cycle to increase vehicle efficiency

Techniques for controlling engine speed based on alternator duty cycle to increase overall vehicle efficiency involve increasing engine speed only after the alternator duty cycle exceeds a duty cycle threshold that is less than the maximum duty cycle of the alternator. In this manner, quantity and/or degree of engine speed increases are decreased, which increases vehicle efficiency (e.g., increased fuel economy).

Power supply apparatus and power processing method

Determine the duty cycle of the pulse width modulation signal to derive the voltage value of the alternating current voltage when the power supply is in the peak power working status. The voltage value of the alternating current voltage is determined as high if the duty cycle of the pulse width modulation signal is lower than the predetermined duty cycle.
Power Forest Technology Corporation

Methods and apparatuses for memory power reduction

Methods and apparatuses for memory power reduction are provided. The apparatus determines whether to store data into a dram or an nvram during an idle state of a processor based on power consumption by the dram in association with refreshing the data in the dram and use of the data stored in the dram by the processor, based on power consumption by the nvram in association with use of the data stored in the nvram by the processor, and based on a duty cycle associated with current drawn in a first power state and a second power state in association with the data.
Qualcomm Incorporated

Adaptive flow control

A system includes a fixed-displacement fluid pump, a motor operatively connected to the fixed-displacement fluid pump, a sensor configured to sense a parameter related to a drive speed of the motor, and a user interface. The pump controller is configured to receive an input from the user interface of a target flow rate of the pump, determine a duty cycle for the motor based on the target flow rate, and control the motor to operate according to the duty cycle.
Graco Minnesota Inc.

Mold-in touch fastener systems with wave-shaped wall

A touch fastener strip includes a pair of longitudinal barrier walls each extending upward from a base, a plurality of lateral barrier walls each extending upward from the base and between facing surfaces of the barrier walls, thereby defining one or more fastening cells, and a pair of wave walls each extending upward from the base and outboard the barrier walls thereby defining a relief space. Each wave wall has a wave shape having rising and falling edges, at least one of the edges having a slope in the range of 3° to 65°.
Velcro Bvba

High voltage protection system for adjusting duty cycle by using pulse width modulation signal

A high voltage protection system includes a high voltage processing circuit, a pulse width modulation signal outputting circuit, a driving circuit, and a coil module. The high voltage processing circuit is used for receiving and processing a high voltage.
Prolific Technology Inc.

Control strategies for multilevel line regenerative drive

A control system (48) having a motor (28) is disclosed. The control system (48) may include a converter (32) operatively connected to a power source (36), an inverter (34) operatively connected to the motor (28), and a controller (50) operatively connected to the converter (32) or inverter (34).
Otis Elevator Company

Adaptive subframe puncturing for carrier sensing adaptive transmission

A node in a wireless communication system includes a transceiver that operates according to a first radio access technology (rat). The transceiver is to measure a medium usage by one or more other nodes that operate according to a second rat.
Alcatel-lucent Usa Inc.

Image processing circuit and image contrast enhancement method thereof

An image processing circuit and an image contrast enhancement method of the imaging processing circuit are provided. The image processing circuit includes an index generating unit, a data compensation unit, and a data gain unit.
Novatek Microelectronics Corp.

Synchronous buck regulator with short circuit to voltage source protection

A method and apparatus for a power converter assembly detects an over-current, latches off a low-side switch if an over-current is detected, holds the low-side switch latched off until a pwm controller provides a predetermined minimum pulse to the latch (for the duration of the over-current), and unlatches the low-side switch if a pwm controller provides a predetermined minimum pulse to the latch. A power converter assembly includes a pwm controller coupled to the main switch, the pwm controller configured to control the main switch according to a duty cycle.
Continental Automotive Systems, Inc.

Position control of flow control valves near endstops

Techniques for learning endstop position(s) of an actuator for a wastegate valve include detecting a learn condition and, in response to detecting the learn condition, performing a learn procedure for the actuator endstop position(s). The learn procedure includes commanding the actuator to a desired position past the endstop position corresponding to a fully-closed wastegate valve while rate-limiting a velocity of the actuator.

Method for duty cycle distortion detection through decision feedback equalizer taps

An embodiment includes a receiver circuit, a feedback circuit and a control circuit. The receiver circuit is configured to receive each data bit of a plurality of data bits.
Oracle International Corporation

Pulse width modulator for dc/dc converters

A conventional single-ended, primary-inductance converter (sepic) has its switching frequency determined by a controller, which determines the duty cycle at which the switch operates by measuring differences between the sepic output voltage and a reference voltage. Output voltage overshoot and undershoot are reduced..
Continental Automotive Systems, Inc.

Electro-hydraulic servo valve control system

A control system includes an electro-hydraulic servo valve configured to move about a plurality of positions in response to receiving an analog bi-polar current signal. An electronic field programmable gate array (fpga) generates first and second digital pulse width modulation (pwm) signals according to an adjustable duty cycle.
Goodrich Corporation

Time-of-light-based systems using reduced illumination duty cycles

Time-of-flight (tof) based systems using light pulse compression are described and, in some cases, can help increase demodulation contrast. Further, light pulse shaping techniques are described that, in some cases, can help reduce phase non-linearity and distance-calculation errors.
Heptagon Micro Optics Pte. Ltd.

Method and aparatus to control an ignition system

A method is provided for controlling an ignition system which includes a spark plug control unit adapted to control at least one coil stage, the at least one coil stage adapted to successively energise and de-energise to provide a current to a spark plug, each coil stage includes a primary winding inductively coupled to a secondary winding. The method includes measuring low side voltages at one or more of each coil stage and controlling a duty cycle or a pulse width of a pwm-signal of a step-down converter stage dependent on a battery voltage, a maximum primary current threshold, and the measured voltages..
Delphi Automotive Systems Luxembourg As



Duty Cycle topics:
  • Duty Cycle
  • Computer Program
  • Distributed
  • Buffer Circuit
  • Integrated Circuit
  • Differential Amplifier
  • Duty Cycle Correction
  • Ultrasonic
  • Reference Voltage
  • Thermostat
  • Modulation
  • Wireless Power
  • Calculator
  • Control Unit
  • Bridge Inverter


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    This listing is a sample listing of patent applications related to Duty Cycle for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Duty Cycle with additional patents listed. Browse our RSS directory or Search for other possible listings.


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