Patent application number | Description | Published |
20080220084 | COMBINATION THERAPY FOR ALLEVIATING PAIN-RELATED CONDITIONS - The present invention provides compositions and methods for alleviating physical discomfort and/or pain-related conditions in a subject, comprising one or more ingredients that improve blood circulation, one or more ingredients that reduce pain and one or more ingredients that enhance bone health. The ingredients are selected from synthetic compounds, natural products, natural ingredients, extracts from natural ingredients, or combinations thereof. The compositions of the invention are particularly useful in alleviating musculoskeletal pain and nerve related pain. | 09-11-2008 |
20120149354 | VEHICLE INFORMATION SYSTEM - A vehicle information system includes: a vehicle-mounted device, a network processing device and a service center which is adapted for providing service for the vehicle-mounted device. A service configuration channel is configured between the network processing device and the service center and is adapted for transmitting configuration data which are adapted for configuring service that is provided for the vehicle-mounted device. The service configuration channel is established on basis of connection to internet. A service channel system is configured between the vehicle-mounted device and the service center. A complete solution for providing information service may be provided by the vehicle information system, thereby improving the quality of user experience while using a vehicle. | 06-14-2012 |
20120149365 | VEHICLE INFORMATION SYSTEM - A vehicle information system includes: a vehicle-mounted device, a voice service system and a service center which is adapted for providing service data. A first service channel system is configured between the voice service system and the vehicle-mounted device, and adapted for transmitting voice data. A second service channel is configured between the voice service system and the service center, and adapted for transmitting configuration data which is adapted for configuring the service data that are provided for the vehicle-mounted device. And the second service channel is established on basis of connection to internet. A third service channel system is configured between the service center and the vehicle-mounted device. A complete solution for providing real-time information service may be provided by the vehicle information system, thereby improving the quality of user experience while using a vehicle. | 06-14-2012 |
20120158212 | INTELLIGENT DATA CENTER BASED ON SERVICE PLATFORM FOR VEHICLE-MOUNTED DEVICES - The present invention provides a intelligent data center based on a service platform for vehicle-mounted devices, including: a static data storage unit, adapted for storing static data relating to a vehicle-mounted device; a static data processing unit, adapted for processing the static data stored in the static data storage unit; a dynamic data storage unit, adapted for storing dynamic data which are relating to the vehicle-mounted device and acquired by the service platform for vehicle-mounted devices; and a data analysis unit, adapted for analyzing the static data and the dynamic data. The intelligent data center can provide a wide variety of services for the vehicle-mounted device through the service platform. | 06-21-2012 |
20120259480 | VEHICLE-MOUNTED DEVICE, METHOD FOR ACTIVATING THE VEHICLE-MOUNTED DEVICE AND VEHICLE-MOUNTED SYSTEM - The present invention provides a vehicle-mounted device, a method for activating the vehicle-mounted device, and a vehicle-mounted system. The vehicle-mounted system includes a vehicle-mounted device, a data center, and a service platform. The vehicle-mounted device not only can be locally activated according to an activating information corresponding to an identity information of the vehicle-mounted device which indicates an unique identity of the vehicle-mounted device, but also can be remotely activated through wireless communication. Moreover, the vehicle-mounted system further includes application sub-modules which can provide extended/added functions. Therefore, by the method for activating a vehicle-mounted device provided by the present invention, the vehicle-mounted device can be activated in time, so that the information resources can be more easily and conveniently obtained by the user. | 10-11-2012 |
Patent application number | Description | Published |
20080286582 | Surge absorbing material with dual functions - A surge absorbing material with dual functions has one of the characteristics among capacitance, inductance, voltage suppressor and thermistor in addition to surge absorbing characteristic, which microstructural compositions include a glass substrate with high resistance and three kinds of low-resistance conductive or semiconductive particles in micron, submicron and nanometer size uniformly distributed in the glass substrate to provide with good surge absorbing characteristic. | 11-20-2008 |
20080286898 | Material composition having core-shell microstructure used for varistor - A material composition having a core-shell microstructure suitable for manufacturing a varistor having outstanding electrical properties, the core-shell microstructure of the material composition at least comprising a cored-structure made of a conductive or semi-conductive material and a shelled-structure made from a glass material to wrap the cored-structure, and electrical properties of the varistors during low temperature of sintering process can be decided and designated by precisely controlling the size of the grain of the cored-structure and the thickness and insulation resistance of the insulating layer of the shelled-structure of material composition. | 11-20-2008 |
20090321691 | Process for producing surge absorbing material with dual functions - A kind of manufacturing method for dual functions with varistor material and device has one of the characteristics among capacitance, inductance, voltage suppressor and thermistor in addition to surge absorbing characteristic, which microstructural compositions include a glass substrate with high resistance and three kinds of low-resistance conductive or semiconductive particles in micron, submicron and nanometer size uniformly distributed in the glass substrate to provide with good surge absorbing characteristic. | 12-31-2009 |
20100117271 | Process for producing zinc oxide varistor - A process for producing zinc oxide varistors is to perform the doping of zinc oxide and the sintering of zinc oxide grains with a high-impedance sintering material through two independent procedures, so that the doped zinc oxide and the high-impedance sintering material are well mixed in a predetermined ratio and then used to make the zinc oxide varistors through conventional technology by low-temperature sintering (lower than 900° C.); the resultant zinc oxide varistors may use pure silver as inner electrode and particularly possess one or more of varistor properties, thermistor properties, capacitor properties, inductor properties, piezoelectricity and magnetism. | 05-13-2010 |
20120057265 | ZINC-OXIDE SURGE ARRESTER FOR HIGH-TEMPERATURE OPERATION - A ZnO surge arrester for high-temperature operation is characterized in that a grain boundary layer between ZnO grains thereof contains a BaTiO | 03-08-2012 |
20120135563 | PROCESS FOR PRODUCING MULTILAYER CHIP ZINC OXIDE VARISTOR CONTAINING PURE SILVER INTERNAL ELECTRODES AND FIRING AT ULTRALOW TEMPERATURE - A low-temperature firing process is available for cost saving to produce a multilayer chip ZnO varistor containing pure silver (Ag) formed as internal electrodes and calcined at ultralow firing temperature of 850-900° C., which process comprises:
| 05-31-2012 |
20130011963 | PROCESS FOR PRODUCING ZINC OXIDE VARISTOR - A process for producing zinc oxide varistors possessed a property of breakdown voltage (V1mA) ranging from 230 to 1,730 V/mm is to perform the doping of zinc oxide and the sintering of zinc oxide grains with a high-impedance sintered powder through two independent procedures, so that the doped zinc oxide and the high-impedance sintered powder are well mixed in a predetermined ratio and then used to make the zinc oxide varistors through conventional technology by low-temperature sintering (lower than 900° C.); the resultant zinc oxide varistors may use pure silver as inner electrode and particularly possess breakdown voltage ranging from 230 to 1,730 V/mm. | 01-10-2013 |
20130133183 | PROCESS FOR PRODUCING ZINC OXIDE VARISTOR HAVING HIGH POTENTIAL GRADIENT AND HIGH NON-LINEARITY COEFFICIENT - A process for producing zinc oxide varistor is disclosed to allow that one step of having zinc oxide grains doped with non-equivalent ions and sufficiently semiconductorized and the other one step of preparing sintered powders having property of high-impedance are prepared by two separate procedures respectively, resulted in that the zinc oxide varistor produced by the process features both a high potential gradient and a high non-linearity coefficient; and more particularly the disclosed process is suited for producing a specific zinc oxide varistor whose potential gradient ranges from 2,000 to 9000 V/mm as well as non-linearity coefficient (α) ranges from 21.5 to 55. | 05-30-2013 |
Patent application number | Description | Published |
20080309245 | SYSTEM AND METHOD FOR ANALOG VOLTAGE PROCESSING IN WIDE RANGE FOR COLD-CATHODE FLUORESCENT LAMP - System and method for processing analog voltage for cold-cathode fluorescent lamp. The system includes a voltage-to-current converter configured to receive an input analog voltage signal and generate a first current signal, and a current processing component configured to receive the first current signal and a predetermined current and generate a second current signal. Additionally, the system includes a current-to-voltage converter configured to receive the second current signal and generate an output analog voltage signal, and a dimming controller configured to receive the output analog voltage signal and generate a control signal for driving at least a cold-cathode fluorescent lamp. The voltage-to-current converter, the current processing component, and the current-to-voltage converter are configured to be biased between a first power supply voltage level and a second power supply voltage level. | 12-18-2008 |
20100315148 | LOW FREQUENCY OSCILLATOR FOR BURST-MODE DIMMING CONTROL FOR CCFL DRIVER SYSTEM - Oscillator system and method thereof. The oscillator system includes a first voltage-to-current converter configured to receive a first voltage and generate a first current based on at least information associated with the first voltage, and a second voltage-to-current converter configured to receive a second voltage and generate a second current based on at least information associated with the second voltage. Additionally, the oscillator system further includes a current-mode N-bit digital-to-analog converter configured to receive at least the second current and a first clock signal and to generate a third current based on at least information associated with the second current and the first clock signal. N is a first integer. The first clock signal is associated with a first clock frequency corresponding to a first clock period. Moreover, the oscillator system further includes a current comparator coupled to the first voltage-to-current converter and the current-mode N-bit digital-to-analog converter. | 12-16-2010 |
20110279153 | HIGH-PRECISION OSCILLATOR SYSTEMS WITH FEED FORWARD COMPENSATION FOR CCFL DRIVER SYSTEMS AND METHODS THEREOF - System and method for generating one or more ramp signals. The method includes an oscillator configured to generate at least a clock signal, and a ramp signal generator configured to receive at least the clock signal and generate a first ramp signal. Additionally, the ramp signal generator is coupled to a first resistor including a first terminal and a second terminal. The first resistor is configured to receive an input voltage at the first terminal and is coupled to the ramp signal generator at the second terminal. Moreover, the first resistor is associated with a first resistance value. Also, the clock signal is associated with at least a predetermined frequency. The predetermined frequency does not change if the input voltage changes from a first magnitude to a second magnitude. The first magnitude is different from the second magnitude. | 11-17-2011 |
20110279161 | LOW FREQUENCY OSCILLATOR FOR BURST-MODE DIMMING CONTROL FOR CCFL DRIVER SYSTEM - Oscillator system and method thereof. The oscillator system includes a first voltage-to-current converter configured to receive a first voltage and generate a first current based on at least information associated with the first voltage, and a second voltage-to-current converter configured to receive a second voltage and generate a second current based on at least information associated with the second voltage. Additionally, the oscillator system further includes a current-mode N-bit digital-to-analog converter configured to receive at least the second current and a first clock signal and to generate a third current based on at least information associated with the second current and the first clock signal. N is a first integer. The first clock signal is associated with a first clock frequency corresponding to a first clock period. Moreover, the oscillator system further includes a current comparator coupled to the first voltage-to-current converter and the current-mode N-bit digital-to-analog converter. | 11-17-2011 |
20110316428 | SYSTEMS AND METHODS FOR CONTROLLING BRIGHTNESS OF COLD-CATHODE FLUORESCENT LAMPS WITH WIDE DIMMING RANGE AND ADJUSTABLE MINIMUM BRIGHTNESS - System and method for adjusting brightness of one or more cold-cathode fluorescent lamps. The system includes a voltage selector configured to receive a dimming voltage and a first threshold voltage and generate an output voltage. The output voltage is selected from a group consisting of the dimming voltage and the first threshold voltage. Additionally, the system includes an oscillator coupled to a first capacitor and configured to generate a ramp signal with the first capacitor, and a signal generator configured to receive the ramp signal and the output voltage and generate a first signal. The first signal corresponds to a lamp brightness level. Moreover, the system includes a brightness detector configured to receive the first signal and output a second signal. The second signal indicates whether the lamp brightness level is higher than a threshold brightness level. | 12-29-2011 |
20120326629 | SYSTEMS AND METHODS FOR INTELLIGENT CONTROL OF COLD-CATHODE FLUORESCENT LAMPS - System and method for driving one or more cold-cathode fluorescent lamps. For example, the method includes generating at least one drive signal associated with a signal frequency, the signal frequency being equal to a first predetermined frequency, receiving a current-sensing signal, the current-sensing signal being associated with a lamp current for the one or more cold-cathode fluorescent lamps in response to at least the first predetermined frequency, and determining whether the current-sensing signal is larger than a first threshold in magnitude, the current-sensing signal being related to the first predetermined frequency. Additionally, the method includes, if the current-sensing signal related to the first predetermined frequency is determined to be larger than the first threshold in magnitude at anytime during a first period of time, changing the signal frequency from the first predetermined frequency to a second predetermined frequency, the second predetermined frequency being different from the first predetermined frequency. | 12-27-2012 |
20130033105 | SYSTEMS AND METHODS FOR CURRENT MATCHING OF LED CHANNELS - System and method are provided for generating a plurality of channel currents. The system includes a channel reference generator configured to receive a first reference current and generate at least a first channel driving current and a second channel driving current, a first channel current divider configured to receive the first channel driving current and generate a first input current, a second input current, and a third input current, a second channel current divider configured to receive the second channel driving current and generate a fourth input current, a fifth input current, and a sixth input current, a first channel driver configured to receive the first input current, the second input current, and the third input current and generate a first channel current, and a second channel driver configured to receive the fourth input current, the fifth input current, and the sixth input current and generate a second channel current. | 02-07-2013 |
20130147357 | SYSTEMS AND METHODS FOR CONTROLLING BRIGHTNESS OF COLD-CATHODE FLUORESCENT LAMPS WITH WIDE DIMMING RANGE AND ADJUSTABLE MINIMUM BRIGHTNESS - System and method for adjusting brightness of one or more cold-cathode fluorescent lamps. The system includes a voltage selector configured to receive a dimming voltage and a first threshold voltage and generate an output voltage. The output voltage is selected from a group consisting of the dimming voltage and the first threshold voltage. Additionally, the system includes an oscillator coupled to a first capacitor and configured to generate a ramp signal with the first capacitor, and a signal generator configured to receive the ramp signal and the output voltage and generate a first signal. The first signal corresponds to a lamp brightness level. Moreover, the system includes a brightness detector configured to receive the first signal and output a second signal. The second signal indicates whether the lamp brightness level is higher than a threshold brightness level. | 06-13-2013 |
20130147527 | HIGH-PRECISION OSCILLATOR SYSTEMS WITH FEED FORWARD COMPENSATION FOR CCFL DRIVER SYSTEMS AND METHODS THEREOF - System and method for generating one or more ramp signals. The method includes an oscillator configured to generate at least a clock signal, and a ramp signal generator configured to receive at least the clock signal and generate a first ramp signal. Additionally, the ramp signal generator is coupled to a first resistor including a first terminal and a second terminal. The first resistor is configured to receive an input voltage at the first terminal and is coupled to the ramp signal generator at the second terminal. Moreover, the first resistor is associated with a first resistance value. Also, the clock signal is associated with at least a predetermined frequency. The predetermined frequency does not change if the input voltage changes from a first magnitude to a second magnitude. The first magnitude is different from the second magnitude. | 06-13-2013 |
20130169325 | SYSTEMS AND METHODS OF SIGNAL SYNCHRONIZATION FOR DRIVING LIGHT EMITTING DIODES - System and method for signal synchronization. The system includes a first selection component, a first signal generator, a second signal generator and a first gate drive component. The first selection component is configured to receive a first mode signal and generate a first selection signal based on at least information associated with the first mode signal. The first signal generator is configured to, if the first selection signal satisfies one or more first conditions, receive a first input signal and generate at least a first clock signal based on at least information associated with the first input signal. Furthermore, the first gate drive component is configured to, if the first selection signal satisfies the one or more first conditions, receive at least the first clock signal and output a first drive signal to a first switch. | 07-04-2013 |
20130307431 | SYSTEMS AND METHODS FOR DIMMING CONTROL USING SYSTEM CONTROLLERS - System and method for dimming control. The system includes a system controller, a transistor, and a resistor. The system controller includes a first controller terminal and a second controller terminal. The transistor includes a first transistor terminal, a second transistor terminal and a third transistor terminal. The resistor including a first resistor terminal and a second resistor terminal. The first transistor terminal is coupled, directly or indirectly, to the second controller terminal. The first resistor terminal is coupled to the second transistor terminal. The second resistor terminal is coupled to the third transistor terminal. The system controller is configured to receive an input signal at the first controller terminal and to generate an output signal at the second controller terminal. The transistor is configured to receive the output signal at the first transistor terminal and to change between a first condition and a second condition. | 11-21-2013 |
20140132172 | SYSTEMS AND METHODS FOR DIMMING CONTROL USING TRIAC DIMMERS - System and method for dimming control of one or more light emitting diodes. An example system includes one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch. The one or more signal processing components are further configured to, if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency. | 05-15-2014 |
20140176218 | LOW FREQUENCY OSCILLATOR FOR BURST-MODE DIMMING CONTROL FOR CCFL DRIVER SYSTEM - Oscillator system and method thereof. The oscillator system includes a first voltage-to-current converter configured to receive a first voltage and generate a first current based on at least information associated with the first voltage, and a second voltage-to-current converter configured to receive a second voltage and generate a second current based on at least information associated with the second voltage. Additionally, the oscillator system further includes a current-mode N-bit digital-to-analog converter configured to receive at least the second current and a first clock signal and to generate a third current based on at least information associated with the second current and the first clock signal. N is a first integer. The first clock signal is associated with a first clock frequency corresponding to a first clock period. Moreover, the oscillator system further includes a current comparator coupled to the first voltage-to-current converter and the current-mode N-bit digital-to-analog converter. | 06-26-2014 |
20140177280 | SYSTEMS AND METHODS FOR SOURCE SWITCHING AND VOLTAGE GENERATION - System and method for regulating a power conversion system. An example system controller for regulating a power conversion system includes a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a primary winding of a power conversion system, a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal, and a third controller terminal associated with a third controller voltage. The first controller voltage is equal to a sum of the third controller voltage and a first voltage difference. The second controller voltage is equal to a sum of the third controller voltage and a second voltage difference. | 06-26-2014 |
20140346973 | SYSTEMS AND METHODS FOR DIMMING CONTROL USING TRIAC DIMMERS - System and method for dimming control of one or more light emitting diodes. An example system includes one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch. The one or more signal processing components are further configured to, if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency. | 11-27-2014 |
Patent application number | Description | Published |
20090309598 | APPARATUS FOR SUPPLYING STABLE, ISOLATED DC POWER AND METHOD OF MAKING SAME - A power supply having an input, wherein the power supply includes a multi-winding transformer having an input and a plurality of outputs, and a plurality of rectifiers to provide a plurality of DC output voltages, wherein each rectifier is coupled to an output of the multi-winding transformer. The power supply further includes a regulator circuit coupled between the transformer input and one of the transformer outputs, and configured to regulate an input voltage to the multi-winding transformer to minimize a variance of each rectifier DC output voltage. | 12-17-2009 |
20130099590 | SYSTEM AND METHOD FOR POWER SUPPLY CONTROL - A resonant power supply is provided. The resonant power supply comprises a series resonant converter configured to convert an input DC voltage to an output DC voltage to generate an output DC voltage. The series resonant converter includes a switching stage, a resonant inductor, a resonant capacitor, and an isolation transformer. The resonant power supply further comprises a converter controller configured to obtain an actual trajectory radius signal based on a resonant inductor current, a resonant capacitor voltage, and a voltage in association with the isolation transformer. The converter controller is further configured to generate a trajectory radius command signal based on a DC voltage command signal and a DC voltage feedback signal, and to generate control signals to be applied to the switching stage based on the actual trajectory radius signal and the trajectory radius command signal. | 04-25-2013 |
20130099787 | SYSTEM AND METHOD FOR SERIES RESONANT CONVERTER PROTECTION - A resonant power supply is disclosed. The resonant power supply includes a series resonant configured to convert an input DC voltage to an output DC voltage. The resonant power supply further comprises a converter controller coupled to the series resonant converter and configured to receive a DC voltage feedback signal measured at the output of the series resonant converter, or a resonant current feedback signal representing a resonant current flowing through the series resonant converter. The converter controller is further configured to generate control signals to be applied to the series resonant converter to limit the output DC voltage of the series resonant converter according to the DC voltage feedback signal and a predetermined voltage threshold signal, or to limit the resonant current of the series resonant converter according to the resonant current feedback signal and a predetermined current threshold signal. | 04-25-2013 |
20130099788 | SYSTEM AND METHOD FOR GRADIENT AMPLIFIER CONTROL - A gradient amplifier for driving a gradient coil is disclosed. The gradient amplifier includes a direct current (DC) bus for receiving DC voltage generated from a series resonant converter, an inverter coupled to the DC bus configured to receive the DC voltage at the DC bus and convert the DC voltage to generate an output voltage to be applied to the gradient coil, and an inverter controller coupled to the inverter. The inverter controller is configured to generate control signals to control operation of the inverter based at least on a DC voltage feedback signal measured at the DC bus, an output voltage feedback signal measured at the output of the inverter, and a reference output voltage signal indicative of a desired voltage to be achieved at the output of the inverter. | 04-25-2013 |
20130134710 | SYSTEM AND METHOD FOR CONVERTER SWITCHING FREQUENCY CONTROL - A system for power conversion includes a power converter having switching elements, a detector, and a controller is provided. The detector detects a parameter and provides electrical signals indicative of the parameter. The controller receives the electrical signals transmitted from the detector, and sends commands to instruct the power converter to perform power conversion by operating the switching elements in accordance with switching signals at a different frequency in response to a detection of the system condition. A method for operating the system is also provided. | 05-30-2013 |
20140346891 | DEVICE AND METHOD TO BREAK THE CURRENT IN POWER TRANSMISSION OR DISTRIBUTION SYSTEM - A direct current (DC) circuit breaker for power transmission or distribution system includes a current sensor for sensing current of a system, a controller, a physical switch, and multiple switch modules. The multiple switch modules are electrically coupled to the current sensor and the physical switch in series. Each switch module includes multiple base elements electrically coupled in parallel. Each base element includes a first silicon carbide (SiC) metal-oxide-semiconductor field-effect transistor (MOSFET) and a second SiC MOSFET electrically coupled in an opposite series connection mode. The first and second SiC MOSFETs are configured in a synchronous rectification mode by channel reverse conduction control. The controller controls the multiple switch modules to connect current in the system, and break current of the multiple switch modules according to sensed current signals from the current sensor. | 11-27-2014 |
Patent application number | Description | Published |
20100203338 | DUST SUPPRESSANTS - The present application is directed to an article comprising a dusty surface and a coating on the dusty surface comprising a coating polymer having a Tg less −20° C. and a method of reducing dust. In some embodiments, the polymer has a Tg less than −30° C., and in specific embodiments, the polymer has a Tg less than −45° C. The dusty surface may be, for example, crushed stone, coal, iron ore, gravel, sand or other aggregates (e.g. a roofing granule,) or a soil surface. | 08-12-2010 |
20100267983 | WATER-SOLUBLE TRITERPENEPHENOL COMPOUNDS HAVING ANTITUMOR ACTIVITY AND THE PREPARATION THEREOF - The invention discloses water-soluble triterpenephenol compounds having antitumor activity represented by formula (I), wherein the substituents R | 10-21-2010 |
20120135240 | DUST SUPPRESSANTS - A surface having dust particles thereon and a coating on the surface comprising a coating polymer having a Tg less than −20° C. A method of reducing dust, the method including providing a surface having dust particles thereon and coating the surface with a coating polymer with a Tg less than −20° C. | 05-31-2012 |
20140351443 | VIRTUAL RESOURCE OBJECT COMPONENT - The present invention discloses a Virtual Resource Object Component; it achieves the goal of mapping logical POD to physical POD. The technical solution is: the Virtual Resource Object Component abstractly represents the physical resources in a physical POD as virtual resources. An embodiment of the Virtual Resource Object Component is utilized in a service delivery platform which automatically organizes and connects the physical resources in the physical POD(s), and transforms them into virtual resources which will be delivered to a logical POD. | 11-27-2014 |
Patent application number | Description | Published |
20110074824 | DYNAMIC IMAGE PRESENTATION - One or more techniques and/or systems are disclosed for efficiently organizing images in a display. A size of an image is scaled by an image scale factor, while an aspect ratio for the image is maintained, where the image scale factor comprises a combination of a first scale distance and a second scale distance. The scaled image is filled into a first display line, if the size of the scaled image is not greater than an amount of display space remaining in the first display line; otherwise the scaled image is filled into a second display line. The image is expanded to mitigate white space in the display after the scaling, while maintaining the image's aspect ratio. This can be performed for a collection of images presented on a display to provide an enhanced user experience. | 03-31-2011 |
20130131737 | SEPARABLE PEDICLE SCREW - Techniques are generally described related to a method and system for treating an injury with a bone screw. One example bone screw may be configured to fracture at a pre-selected frangible location so that the point of failure is not in an inaccessible location, e.g., deeply embedded below the surface of a treated bone. The bone screw may further include a material disposed over the frangible location that is designed to temporarily strengthen the screw and selected to be absorbed by the body over a period of time after installation of the screw in the bone. One example bone screw may include an unthreaded portion that is configured to facilitate removal of an embedded screw fragment from a bone in the event that the screw fails in vivo. | 05-23-2013 |
20130261667 | ROD SYSTEM FOR GRADUAL DYNAMIC SPINAL FIXATION - A rod system includes two rods each with a head and a shaft, two elastic members each fitted around one shaft against one head, and a case defining a first inner portion, a second inner portion, and a third inner portion in communication with the first and the second inner portions. A first rod with a first elastic member is seated in the first inner portion so the first elastic member abuts the bottom of first inner portion and the first head protrudes into the third inner portion. A second rod and a second elastic member is seated in the second portion so the second elastic member abuts the bottom of the second inner portion and the second head protrudes into the third inner portion and abuts the first head. | 10-03-2013 |
20140194931 | ROD SYSTEM FOR GRADUAL DYNAMIC SPINAL FIXATION - A rod system includes two rods each with a head and a shaft, two elastic members each fitted around one shaft against one head, and a case defining a first inner portion, a second inner portion, and a third inner portion in communication with the first and the second inner portions. A first rod with a first elastic member is seated in the first inner portion so the first elastic member abuts the bottom of first inner portion and the first head protrudes into the third inner portion. A second rod and a second elastic member is seated in the second portion so the second elastic member abuts the bottom of the second inner portion and the second head protrudes into the third inner portion and abuts the first head. | 07-10-2014 |
20140296928 | SEPARABLE PEDICLE SCREW - Techniques are generally described related to a method and system for treating an injury with a bone screw. One example bone screw may be configured to fracture at a pre-selected frangible location so that the point of failure is not in an inaccessible location, e.g., deeply embedded below the surface of a treated bone. The bone screw may further include a material disposed over the frangible location that is designed to temporarily strengthen the screw and selected to be absorbed by the body over a period of time after installation of the screw in the bone. One example bone screw may include an unthreaded portion that is configured to facilitate removal of an embedded screw fragment from a bone in the event that the screw fails in vivo. | 10-02-2014 |
Patent application number | Description | Published |
20110301109 | Phenylpyrimidone Compounds, the Pharmaceutical Compositions, Preparation Methods and Uses Thereof - The present invention relates to a class of phenylpyrimidone compounds, the pharmaceutical composition, the preparation method and the use thereof. More specifically, the present invention relates to a type of phenylpyrimidone compounds of the following formula I, the pharmaceutically acceptable salts or solvates thereof and to the pharmaceutical composition as well as the preparation method of the compounds. The compounds of formula I according to the present invention can effectively inhibit type V phosphodiesterase (PDE5), and thus can be used for the treatment of various vascular disorders, such as male erectile dysfunction, pulmonary hypertension and the like. | 12-08-2011 |
20130163873 | Detecting Separator Lines in a Web Page - A system and method of detecting separator lines in a web page may include determining coordinates of visible web elements on a web page, generating an edge image of the web page based on the coordinates of the web elements, filtering edges belonging to non-separator line elements within the edge image, detecting horizontal lines within the edge image, detecting vertical lines within the edge image, and filtering short lines within the edge image. A system for detecting separator lines in a web page may include a memory device, and a processor communicatively coupled to the memory, in which the processor determines coordinates of visible web elements on a web page, generates an edge image of the web page based on the coordinates of the web elements, filters edges belonging to non-separator line elements within the edge image, detects horizontal lines within the edge image, detects vertical lines within the edge image, and filters short lines within the edge image. | 06-27-2013 |
Patent application number | Description | Published |
20080198905 | Method and Apparatus for Despread Data in Wireless Communication System - The present invention provides a method for despreading spread signal used in a receiver of a wireless communication system, comprising the steps of: preprocessing spread signal to derive a group of spreading chips corresponding to a data symbol; processing Hie spreading chips to extract cophase components and orthogonal components of each of the spreading chips; and converting and combining the group of cophase components and orthogonal components according to a preset selecting signal to derive a group of despreading chips. The present invention further provides an apparatus for carrying out the above-mentioned method, which significantly simplifies the design of a dispreading circuit and reduces the area of the dispreading circuit | 08-21-2008 |
20080205555 | Method and Apparatus for Channel Estimation - A channel estimation method, comprising the steps of: receiving radio signals transmitted through wireless channel; calculating the channel fading coefficients of pilot symbols, which inserted in a time slot allocated to the wireless signals; estimating the channel fading coefficients of each of predefined groups of chips in the time slot step by step, by utilizing the channel fading coefficients of the pilot symbols and the correlation between the pilot symbols and traffic data in the time slot, wherein each group of chips is composed of predefined number of chips. | 08-28-2008 |
20080209174 | Processor And Its Instruction Issue Method - An instruction issue method for use in a pipelined processor, comprising the steps of: decoding an instruction to be processed to get a type of the instruction; computing the number of cycles to be occupied at execution stage for the instruction, according to the type of the instruction; marking a target operand of the instruction as acquirable in a predefined cycle before the instruction enters write-back stage, according to the number of cycles, so that subsequent instructions taking the target operand as their source operands perform subsequent operations according to the case that the target operand is acquirable. | 08-28-2008 |
20080250093 | Method and Apparatus for Filtering Multiple Channels of Signals - To reduce chip size and lower cost by using a method of multiplexing a device to filter a plurality of signals, the present invention provides an apparatus for filtering the plurality of signals, comprising: a group of storage units, for storing the plurality of signals, wherein the group of storage units comprises a plurality of storage units, each of which is used to store corresponding signal segments in each signal and output the stored signal segments in a predefined order; and a processing module, for weighting and combining the output signals from the group of storage units, to obtain a plurality of filtered signals corresponding to the multiple channels of signals. The group of storage units may further comprise a group of combining units, for combining output signal segments from the storage units to be processed with a same weight value. The present invention further provides the corresponding method for filtering a plurality of signals. With the method and apparatus of the present invention, the filter size may be reduced significantly and the cost may be lowered. | 10-09-2008 |
20080316993 | Method and Apparatus For Implementing Matched Filters in a Wireless Communication System - The present invention discloses a method and apparatus for implementing matched filter in a system using QPSK modulation. In the present invention, a multiplier is changed as a multiplexer by using the characteristic of the pilot sequence (or training sequence) so as to implement the matched filter. | 12-25-2008 |
Patent application number | Description | Published |
20100303170 | METHOD AND APPARATUS FOR PRE-PROCESSING DATA TO BE TRANSMITTED IN MULTIPLE-INPUT COMMUNICATION SYSTEM - A method for pre-processing data to be transmitted in a multiple-input communication system comprises the following steps: generating a beamforming matrix and a pre-coding matrix; combining the beamforming matrix and the pre-coding matrix to generate a weight matrix; and pre-processing the data by using the generated weight matrix. There are also provided a transmitter, a base station, and a communication system using the method. | 12-02-2010 |
20100309999 | METHOD AND DEVICE FOR CYCLIC DELAY MAPPING FOR THE SIGNAL IN THE MULTI-ANTENNA TRANSMITTER - A method of carrying out cyclic delay mapping, wherein, the CDD-like transmitter generate multiple branches of signals c0orresponding to the multiple transmitting antennas with varying cyclic delay mapping rules, so as to make the cyclic delay parameter, corresponding to at least one of the multiple transmitting antennas, vary as time goes by, in order to prevent the system performance from degrading as time goes by. | 12-09-2010 |
20110028156 | METHOD AND DEVICE FOR CONTROLLING THE COORDINATED TRANSMISSION FOR DOWNLINK SIGNALS IN A WIRELESS TELECOMMUNICATION NETWORK - A method and device for controlling the serving BS and at least one coordinating BS for coordinating downlink data communication with the MS in a wireless telecommunication network based on CO-MIMO technology. The method comprises obtaining the MIMO downlink channel information between the serving BS and the MS and between the coordinating BS and the MS, determining the downlink signal precoding information between the serving BS and the MS and between the coordinating BS and the MS according to the channel information, and performing MIMO downlink data communication coordinately with the MS based on the downlink signal precoding information. | 02-03-2011 |
20110164526 | METHOD AND APPARATUS FOR UPLINK SIGNAL TRANSMISSION AND CHANNEL ESTIMATION IN WIRELESS ACCESS NETWORK - The present invention provides a new method and apparatus, in a network device of a multi-carrier based wireless access network, for transmitting uplink data to access device side, and the corresponding method and apparatus for channel estimation in its uplink counterpart device, wherein, a plurality of network device comprise one or more multi-antenna network devices, at least one of the multi-antenna network device transmits multipath subcarrier modulated symbols via a plurality of transmitting antennas configured for itself, wherein, at least two transmitting antennas use different subcarrier sets, but share one pilot pattern, wherein, pilot pattern used by each network device is different from the pilot pattern used by any other network device. The present invention not only can fully utilize the frequency diversity introduced by the plurality of transmitting antennas, but also can guarantee a relative high antenna power gain and save as much time-frequency resource cost caused by pilot signal as possible. | 07-07-2011 |
20110207494 | METHOD AND APPARATUS FOR MIMO-BASED MULTIPLE BASE STATION COLLABORATIVE COMMUNICATION - A solution for multiple base station collaborative communication in TDD (Time Division Duplex) and FDD (Frequency Division Duplex) systems is provided. To be specific, a serving base station and coordinating base station transmit detection signals with specific Multiple Input Multiple Output (MIMO) features on one or more communication resources. The mobile station measures the detection signals on the one or more communication resources and generates indication information of the recommended collaborative communication modes based on the measurement results. Preferably the indexes of the time-frequency resources corresponding to the recommended collaborative communication modes are reported to the serving base station. Then the serving base station schedules at least one of the one or more mobile stations according to the indication information reported by the one or more stations and provides MIMO communication manner for the mobile station scheduled. The coverage of the cells is improved, the cell edge user throughput is increased and the inter-cell interference between neighboring base stations is decreased by exploiting the invention. Preferably the amount of uplink feedback information is decreased and the uplink bandwidth is saved. | 08-25-2011 |
20110255625 | CODEBOOK-BASED MULTI-BASE STATION UNITE PRE-CODING METHOD, MOBILE TERMINAL, AND BASE STATION - The present invention provides a novel codebook-based multi-base station unite pre-coding scheme. In this invention, multiple cooperating base stations commonly transmit signals to a mobile terminal. The mobile terminal estimates a channel matrix of a unite MIMO channel from the multiple cooperating base stations, and selects the optimal pre-coding matrix index from the pre-coding matrix codebook based on the unite MIMO channel matrix and feeds it back to the multiple cooperating base stations. Each cooperating base station selects the optimal pre-coding matrix based on the received pre-coding matrix index and uses the corresponding portion of the pre-coding matrix to perform unite pre-coding on the data. Namely, the respective partial pre-coding matrixes as employed by all cooperating base stations together form the pre-coding matrix that is optimal to the mobile terminal, and the pre-coding matrix as used by respective cooperating base stations is a part of the optimal pre-coding matrix. By using the codebook-based multi-base station unite pre-coding scheme according to the present invention, the user performance is improved, the complexity of implementation is low, and the demand on network connecting the base stations is very low. | 10-20-2011 |
20120014468 | METHOD AND APPARATUS FOR CONTROLLING CO-CHANNEL INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and an apparatus of controlling co-channel interference in a base station of a wireless communication system based on collaborative MIMO and the corresponding method and apparatus of assisting a serving base station to control co-channel interference in a mobile station of a wireless communication system based on collaborative MIMO. Since the feedback mechanism based on the codebook is employed in the collaborative MIMO system in the present invention to enable the BS to obtain the precoding information, the present invention can be used to the both TDD mode and FDD mode. Moreover, since the precoding vectors selected by the different mobile stations for a same BS are always orthogonal, multi-user co-channel interference can be reduced. | 01-19-2012 |
20120040702 | METHOD AND APPARATUS FOR SELECTING OBJECT TERMINAL IN A MULTI-BS MIMO SYSTEM - According to an embodiment of the present invention, on a radio resource block for Multi-BS MIMO, one of the coordinating base stations selects a mobile terminal at first, and informs the other base stations of the characterization information and the pre-coding information etc. of the selected mobile terminal, and the selection made by the other base stations will obey the selection result of the base station that selects at first. By applying the method and apparatus provided by the present invention, the joint selection of object terminals in the Multi-BS MIMO is realized, and such selection is distributed without any central scheduling device which is necessary in the central scheduling scheme. In addition, only very limited information exchange among the coordinating base stations is required to realize the present invention. According to an embodiment of the present invention, the object terminals selected by the coordinating base stations are matched well with each other such that the total performance of the system is improved; according to an embodiment of the present invention, the fairness among the base stations can be well satisfied. | 02-16-2012 |
20140294115 | METHOD AND APPARATUS FOR CONFIGURING TRANSMISSION MODE - Embodiments of the present invention provide a method and an apparatus for configuring a transmission mode, where the method includes: obtaining channel matrix information, where the channel matrix information is any one of the following: a precoding matrix indicator which most matches a current uplink channel matrix of a terminal, a current downlink precoding matrix indicator of the terminal, an uplink channel matrix of the terminal and the precoding matrix indicator which most matches the current uplink channel matrix of the terminal, and the uplink channel matrix of the terminal and the current downlink precoding matrix indicator of the terminal; determining performance of data transmission performed by adopting a closed-loop mode and an open-loop mode according to the channel matrix information, and selecting the data transmission mode according to the determined performance of data transmission, where the data transmission mode includes the open-loop mode, the closed-loop mode. | 10-02-2014 |
20140348017 | MIMO MODE CONFIGURATION METHOD AND COMMUNICATION DEVICE - Embodiments of the present invention provide a MIMO mode configuration method and a communication device, which relate to the field of communications, and are capable of reducing mutual channel interference when users in neighboring cells and on the same channel perform transmission by using configured MIMO mode, thereby improving system performance. The method includes: calculating, under each predetermined MIMO mode combination in a cluster, throughput or an amount of interference of the cluster; and setting, in a predetermined MIMO mode combination corresponding to maximum throughput or a minimum amount of interference of the cluster, a predetermined MIMO mode of each user in the cluster to an actual MIMO mode of the user. The embodiments of the present invention are applied to MIMO mode configuration for a user in a cell. | 11-27-2014 |
Patent application number | Description | Published |
20100045188 | ADJUSTING A DRIVING SIGNAL FOR SOLID-STATE LIGHTING DEVICES - Adjusting a driving signal for a lighting device by obtaining a temperature of the lighting device, and adjusting at least one parameter of a conversion procedure depending on the obtained temperature. Further a set-point of a desired colour and/or brightness is converted into a set-point of colour sensor coordinates with the conversion procedure. The actual colour values of the lighting device are obtained, and the driving signal is adjusted based on a difference between the colour sensor coordinates set-point and the obtained colour values. | 02-25-2010 |
20100296264 | ILLUMINATION DEVICE - The invention relates to an illumination device ( | 11-25-2010 |
20110234121 | METHOD AND SYSTEM OF CONTROLLING ILLUMINATION CHARACTERISTICS OF A PLURALITY OF LIGHTING SEGMENTS - The invention provides a method and system of controlling illumination characteristics of a plurality of lighting segments. According to the invention, there is provided an illumination system, comprising: a plurality of lighting segments; a detecting subsystem configured to detect an illumination intensity and/or color of lights emitted from each lighting segment; a controller configured to receive the detecting subsystem's output signals representing illumination intensity and/or color of lights emitted from each lighting segment and to generate sets of driving signals to respectively adjust the driving currents of each lighting segment in response to the output signals, so as to adjust the illumination intensity and/or color of the lights emitted from each lighting segment in accordance with a predetermined illumination setting, wherein each set of driving signals has a unique period feature which is distinguished from that of other sets of driving signals corresponding to other lighting segments. | 09-29-2011 |
20120074848 | METHOD AND SYSTEM FOR MONITORING PERFORMANCE OF A DISCHARGE LAMP AND CORRESPONDING LAMP - The present invention provides a method of monitoring performance of a discharge lamp. The discharge lamp includes electrodes and a discharge vessel filled with gas and equipped with a luminescent layer, wherein the gas is intended to emit a first ultraviolet light in a first spectral range when the gas is excited by an electric field produced by the electrodes, and at least part of the first ultraviolet light is intended to be changed into a second ultraviolet light in a second spectral range of longer wavelength than the first spectral range by the luminescent layer. The method comprises the steps of finding the value of a first intensity of the first ultraviolet light; finding the value of a second intensity of the second ultraviolet light; and determining the conversion efficiency of the luminescent layer for converting the first ultraviolet light into the second ultraviolet light on the basis of the ratio of the value of the second intensity to the value of the first intensity. | 03-29-2012 |
20120170308 | ADJUSTABLE ILLUMINATION DEVICES - To improve the illumination efficiency of hand-held illumination devices, this invention proposes a new illumination device having the “rolling” function, which is capable of illuminating the target area on which a user is currently focusing and rolling the illuminated area as the user is reading forward or backward. The illumination device comprises two pluralities of lighting elements, an illuminating body and a controller. The controller can control one plurality of lighting elements to emit light to illuminate a part of the illuminating body, which can further deflect the light to a part of the surface of the target. | 07-05-2012 |
20130301262 | LIGHTING DEVICE AND A LUMINAIRE COMPRISING THE LIGHTING DEVICE - The invention discloses a lighting device ( | 11-14-2013 |
20140313736 | LIGHTING DEVICE AND A ROAD LIGHTING LUMINAIRE COMPRISING THE LIGHTING DEVICE - The invention discloses a lighting device for a road lighting luminaire and a lighting luminaire comprising the lighting device. The lighting device comprises a reflector ( | 10-23-2014 |
20140347856 | OUTDOOR LUMINAIRE - The invention discloses an outdoor luminaire. The outdoor luminaire comprises a light module comprising at least one LED unit; wherein said light module is configured such that the light emitted by the light module has a first luminous intensity value no less than 10 cd/klm at a first angle (γi), which is a vertical angle of 90 degrees above a direction pointing directly downward from the luminaire. In this way, the luminous intensity of the outdoor luminaire at a vertical angle of 90 degrees is guaranteed to be no less than 10 cd/klm Since the end user sees the light 710 emitted at a vertical angle of 90 degrees no matter how far away he is from the outdoor luminaire, the end user always perceives a certain level of brightness. Such “certain level of brightness” is helpful in increasing the adaptation level of the end user, and can effectively reduce the end user's perception of glare. | 11-27-2014 |
Patent application number | Description | Published |
20110107174 | METHOD AND APPARATUS FOR INTERCHANGING MULTIPATH SIGNALS IN A SC-FDMA SYSTEM - The present invention provides a MIMO transmitter and a MIMO receiver, used in SC-FDMA system, which make interchanging for multiple paths of modulated symbol sequences in order to acquire diversity gain while ensure PAPR of single antenna. MIMO transmitter interchanges partial symbols of at least one error-correction codeword of at least one of the multipath modulated symbol sequences and partial symbols of at least one error-correction codeword of at least one of the other of the multipath modulated symbol sequences so as to obtain interchanged multipath modulated symbol sequences; MIMO receiver executes inverse-interchanging which is inverse to the interchanging in a MIMO transmitter for multipath interchanged signals received from multiple transmitting antennas. The present invention could reduce the BLER of the entire SC-FDMA system, and obtain diversity gain while ensure PAPR of single antenna. | 05-05-2011 |
20110134853 | METHOD FOR ALLOCATING MOBILE USER RESOURCE AND RESOURCE ALLOCATION SCHEDULER USING THE SAME - Disclosed is a method for allocating mobile user resource, which comprises the steps of: randomly generating a resource allocation mapping sequence by a base station based on a hopping scheme, which has a variable hopping distance; and allocating communication resource by the base station to each UE within a cell, where the base station is present, based on the generated resource allocation mapping sequence. Since the hopping scheme is generated randomly, the resource allocation scheme according to the present invention may randomize a resource allocation procedure among different cells, thereby randomizing the inter-cell interference and decreasing dramatic changes of interference due to the user's movement. | 06-09-2011 |
20120002611 | METHOD AND APPARATUS FOR UPLINK COORDINATED MULTI-POINT TRANSMISSION OF USER DATA - The present invention provides an uplink progressive multi-point coordinated MIMO processing scheme. A coordinated processing management equipment determines whether it is necessary to send ACK or NACK message to neighboring base stations in the same CoMP cluster; when it is necessary to send ACK message to the neighboring base stations, the ACK message is sent to all the neighboring base stations in the cluster which have not participated in joint to inform each neighboring base stations that it is not necessary to send user data to the coordinated processing management equipment; when it is necessary to send NACK message to the neighboring base stations, the NACK message is sent to at least one neighboring base station in the cluster which has not participated in joint to inform the at least one base stations to send user data to the coordinated processing management equipment; according to the user data obtained by the base station and the user data from the at least one neighboring base stations, the coordinated processing management equipment performs joint detection and combination. Through the application of solution of the invention, the backhaul cost has been saved and the complexity of the system realization is reduced. | 01-05-2012 |
20120014315 | METHODS AND DEVICES FOR IMPLEMENTING SYNCHRONOUS UPLINK HARQ PROCESS IN MULTIPLE BS COORDINATED RECEIVING NETWORKS - The invention provides methods for implementing synchronous uplink HARQ process in multiple BS coordinated receiving network. According to one embodiment, for synchronous uplink HARQ process with a relatively short response time limit, the service BS provides a receiving response in accordance with the response time limit, and formally instructs the terminal to retransmit or start a new transmission after the merging is completed. According to another embodiment, the synchronous uplink HARQ process has a response time limit matching the delay of multiple BS Coordinated network, and thus the service BS can transmit receiving response or control signaling on PDCCH after the mergence is completed. Thereby, the synchronous uplink HARQ process in multiple BS Coordinated networks of LTE and LTEA can be implemented. | 01-19-2012 |
20120300724 | METHOD AND APPARATUS FOR REDUCING THE OVERHEAD OF CONTROL SIGNALING - The invention relates to a method and apparatus for reducing an overhead of control signaling. The method of reducing an overhead of control signaling comprises the steps of: generating one of a plurality of downlink control information formats which is used for scheduling a physical uplink shared channel, and transmitting the generated one of the plurality of downlink control information formats which is used for scheduling the physical uplink shared channel, wherein each of the plurality of downlink control information formats includes a minimum payload required for a specific scenario. With the invention, the signaling overhead is minimized. | 11-29-2012 |
20140171143 | METHOD USED FOR UPLINK POWER CONTROL IN A HETEROGENEOUS NETWORK WITH A SHARED CELL-ID - In a heterogeneous network with a shared cell-ID, the current power control mechanism only configures common power control parameters for all UE in a macro cell, and this doesn't match the receiving power of a wireless access point associated actually, and may lead to serious interferences. The invention provides a method used for uplink power control in a UE of a heterogeneous network with a shared cell-ID, wherein, a wireless access point informs the UE of power control parameters which is related to an associated wireless access point of the UE in the heterogeneous networks, the UE determines a uplink power according to the power control parameters, and transmits uplink data based on the determined uplink power. The invention may configure uplink power for the UEs associated to different wireless access points in a heterogeneous network with a shared cell-ID, to make them have the power control parameters matching with their wireless access points. Thus it's allowed that a performance equivalence between different tiers of networks in a heterogeneous network. | 06-19-2014 |
20140213316 | METHOD AND CORRESPONDING APPARATUS FOR POWER CONTROL - According to the exemplary embodiments of the present invention, a wireless access point apparatus in a multi-point coordination system of a heterogeneous network obtains all pathlosses of all coordination micro wireless access points in a coordination set of a user equipment; obtains a real pathlosss from the user equipment to a macro wireless access point; calculates a virtual pathloss from a virtual user equipment corresponding to the user equipment to the macro wireless access point based on the obtained respective pathloss and; and informs the user equipment of information related to the computed virtual pathloss. A user equipment in a multi-point coordination system of a heterogeneous network receives information related to a virtual pathloss from a wireless access point acting as a scheduling network element; and performs power control using an uplink open-loop power control parameter for a macro wireless access point based on the information related to the virtual pathloss. | 07-31-2014 |
20140286274 | METHOD AND CORRESPONDING APPARATUS FOR UPLINK CONTROL CHANNEL POWER CONTROL - Embodiments of the present invention provide a method for power control of a uplink control channel in a coordinated multi-point transmission system. The method comprises: performing the uplink control channel power control based on measured pathloss from a single reception point to the user equipment in a scenario of single-point reception of the uplink control channel; performing the uplink control channel power control by reducing uplink control channel transmission power of the user equipment to thereby reduce inter-cell interference incurred by multi-reception-point reception combining gain in a scenario of multi-point reception of the uplink control channel. Embodiments of the present invention further provide an apparatus for power control of a uplink control channel in a coordinated multi-point transmission system and a corresponding base station. | 09-25-2014 |
20140370889 | METHOD OF DETERMINING ORTHOGONAL RESOURCE BASED ON VIRTUAL CELL ID IN COMP COMMUNICATION SYSTEM - The invention provides a solution, in a reception point of a communication system, of providing a user equipment with a virtual cell ID, where firstly a virtual cell ID corresponding to the reception point is received from a network control device, the virtual cell ID being used for indicating a cluster to which the reception point belongs; then the virtual cell ID is provided to at least one user equipment served by the reception point; and finally resource index information corresponding to each user equipment among the at least one user equipment is transmitted respectively to the each user equipment. There is further provided a solution, in a user equipment of a communication system, of determining an orthogonal resource, where firstly a virtual cell ID of the reception point is obtained; then resource index information corresponding to the present user equipment is received from the reception point; next an orthogonal resource corresponding to the present user equipment is determined according to the virtual cell ID and the resource index information; and finally uplink control information is transmitted to the reception point over the determined orthogonal resource. A tradeoff between the number of orthogonal resources and interference intensity can be achieved by applying of the invention. | 12-18-2014 |
20150049698 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION - A method for transmitting uplink channel state information (CSI) in a coordinated multi-point (CoMP) system is provided, which includes coding and multiplexing operations. In a multiple input multiple output (MIMO) system, a method for transmitting CSI of multiple coordinated points according to an embodiment of the present invention includes coding the CSI of the multiple coordinated points, modulating the coded CSI of the multiple coordinated points, and multiplexing the modulated CSI on a physical uplink shared channel (PUSCH). Multiplexing a rank indicator (RI) in the CSI includes multiplexing different RIs for different uplink ranks, and multiplexing a channel quality indicator/precoding matrix indicator (CQI/PMI) in the CSI includes multiplexing the CQI/PMI in a code word with the highest modulation and coding order and in other code words. Therefore, an issue with the application of the CoMP technology that one user equipment (UE) transmits CSI of multiple coordinated points may be solved, which may facilitate a further development of the CoMP technology. | 02-19-2015 |
20150071202 | METHOD FOR FEEDING BACK UPLINK CONTROL INFORMATION - The present invention provides a method for transmitting uplink control information in coordinated multi-point system. According to an embodiment of the present invention, a method for feeding back channel state information of multiple transmission points in a coordinated multi-point cooperating set is provided, and the method includes: receiving reference signals of the multiple transmission points; based on the reference signals of the multiple transmission points, evaluating channel state information of each of the multiple transmission points; multiplexing and transmitting the channel state information of the multiple transmission points on a physical uplink control channel (PUCCH) of one of the multiple transmission points in a predetermined mapping sequence. The present invention solves the problem caused by coordinated multi-point as to how a user equipment feeds back uplink control information of multiple transmission points on a physical uplink control channel, and is beneficial to further development and application of the coordinated multi-point technology. | 03-12-2015 |
Patent application number | Description | Published |
20080310191 | METHOD AND SYSTEM FOR PULSE FREQUENCY MODULATED SWITCHING MODE POWER SUPPLIES - A pulse frequency modulation (PFM) controller for controlling a switching mode power supply. The controller includes an output terminal for providing a control signal to turn on and off a current in the power supply to regulate an output of the power supply. A first input terminal receives a feedback signal related to the output of the power supply, the feedback signal exhibiting a ringing waveform when the current in the power supply is turned off. The controller also includes a control circuit configured to provide the control signal in response to the feedback signal. The control signal is adapted to turn on the current in the power supply when the feedback signal is substantially at a valley of the ringing waveform of the feedback signal. In an embodiment, such a PFM controller can reduce turn-on transition loss in a power supply and provides frequency dithering to reduce electromagnetic interference. | 12-18-2008 |
20090279333 | METHOD AND APPARATUS FOR REDUCING STANDBY POWER OF SWITCHING MODE POWER SUPPLIES - An apparatus for coupling a switching mode power supply (SMPS) controller to a rectified line voltage. The apparatus includes a high-voltage startup transistor configured to provide a charging current during a startup phase of the SMPS controller and to provide substantially no current during a normal operation phase of the SMPS controller. A switch coupled to the high-voltage startup transistor. The switch receives a control signal from the SMPS controller, for turning off the switch during the startup phase and turning on the switch during the normal operation phase. A biasing device is connected in series with the switch and maintains the startup transistor in an off state when the SMPS controller is in the normal operation phase. A standby current in the apparatus is substantially lower when the SMPS controller is in the normal operation phase than the charging current in the apparatus when the SMPS is in the startup phase. | 11-12-2009 |
20100259952 | SWITCHING MODE POWER SUPPLY CONTROLLER WITH HIGH VOLTAGE STARTUP CIRCUITS - A controller for a switching mode power supply includes two semiconductor chips. The first semiconductor chip has a high-voltage startup transistor coupled to a high-voltage supply input terminal and configured to provide a charging current in a startup phase or protection mode of a switching mode power supply (SMPS) and to provide substantially no current in a normal operation phase of the SMPS. The second semiconductor chip has a control circuit for controlling the switching mode power supply. The second semiconductor chip also has first and second on-chip high-voltage resistors coupled to the high-voltage supply input terminal and the high-voltage startup transistor in the first semiconductor chip. The first and the second on-chip high-voltage resistors are configured to provide a voltage and a current related to a voltage at the high-voltage supply input terminal. | 10-14-2010 |
20110096573 | CONTROL CIRCUITS AND METHODS FOR SWITCHING MODE POWER SUPPLIES - Circuits and method for sensing a system output voltage change and transmitting an electrical signal to an auxiliary winding on the primary side. In an embodiment, a primary side controller detects the electrical signal and turns a power switch on and off to transfer energy from a primary winding to a secondary winding. A secondary side controller generates a voltage pulse at a terminal of the secondary winding when the system output voltage is below a reference voltage. The secondary side controller includes an input terminal connected to a system output, an output terminal connected to a terminal of the secondary winding, and a ground terminal connected to a ground potential of the system output. | 04-28-2011 |
20110096578 | SYSTEM AND METHOD FOR SYNCHRONOUS RECTIFIER - A synchronous rectification circuit for a power converter includes a power switch coupled to a transformer and an output capacitor and a switching control circuit configured to provide a control signal to the power switch in response to a first state and a second state of the voltage across the power switch. In the switching control circuit, the second state is determined prior to the first state is determined. In an embodiment, the switching control circuit includes a voltage comparing unit configured to act in response to the first and second inputs. The voltage comparing unit is also configured to output a logic signal according to the voltage difference between the sensed voltage drop across the power switch and a reference threshold voltage. A logic processing circuit is coupled to the voltage comparing unit and configured to provide the first state and the second state of the voltage across the power switch. | 04-28-2011 |
20110122659 | POWER TRANSISTOR DRIVING CIRCUITS AND METHODS FOR SWITCHING MODE POWER SUPPLIES - A power supply controller is provided for providing a drive current to a control terminal of a power transistor in three time intervals. The controller includes control circuits configured to control the drive current in multiple stages. During a first time interval, first drive current includes a current spike for turning on the power transistor in response to a start of the control signal pulse. During a second time interval, a second drive current includes a ramping current substantially proportional to a magnitude of a current through the power transistor. During a third time interval, current flow to the power transistor is at least partially turned off before an end of the control signal pulse. | 05-26-2011 |
20110261596 | CONTROL CIRCUIT FOR PRIMARY SIDE CONTROL OF SWITCHING POWER SUPPLY - A switched mode power supply (SMPS) includes a transformer with a primary winding, a secondary winding, an auxiliary winding, and a power switch coupled to the primary winding. During one switching cycle, the auxiliary winding provides a feedback signal which includes a first voltage pulse that is induced after the power switch is turned on and a second voltage pulse that is induced after the power switch is turned off. A control circuit includes a circuit for generating a sampling signal for sampling the second voltage pulse in a switching cycle at a time that is determined based on the first voltage pulse in the same switching cycle. A sample-and-hold circuit is configured for sampling and storing the second voltage pulse in response to the sampling signal. A switching signal generating circuit is configured to generate a switching signal for controlling the power switch based on an output of the sample-and-hold circuit. | 10-27-2011 |
20120056551 | HIGH POWER-FACTOR CONTROL CIRCUIT AND METHOD FOR SWITCHED MODE POWER SUPPLY - A switch mode power supply (SMPS) system includes a rectifying circuit for coupling to an AC input voltage and a transformer having a primary winding for coupling to the rectifying circuit and a secondary winding coupled to the primary winding. The system also has a power switch coupled to the primary winding and a control circuit coupled to the power switch. The control circuit is configured to control current flow in the primary winding such that an envelop waveform formed by peak points of current pulses are in phase with the magnitude of the AC input voltage. Moreover, the SMPS system is configured to provide a constant average output current. | 03-08-2012 |
20120134182 | CONTROL CIRCUITS AND METHODS FOR SWITCHING MODE POWER SUPPLIES - A switching mode power supply (SMPS) includes a transformer having a primary winding, a secondary winding for providing an output voltage, and an auxiliary winding. The SMPS also includes a power switch coupled to the primary winding. A first control circuit is coupled to the secondary winding, and is configured to provide a first electrical signal to the secondary winding when the output voltage of the SMPS is less than a reference voltage during a discontinuous time, whereupon a second electrical signal is induced in the auxiliary winding. A second control circuit is coupled to the auxiliary winding and the power switch. The second control circuit is configured to regulate the output of the SMPS by controlling the power switch in response to a feedback voltage signal from the auxiliary winding, and is further configured to turn on the power switch in response to the second electrical signal. | 05-31-2012 |
20130088898 | ZERO STANDBY SWITCHING POWER SUPPLY SOLUTION - A switching mode power supply (SMPS) includes a power transistor coupled to the primary winding of transformer and a resistor coupled between the input power source and a control terminal of the power transistor for triggering a primary current flow through the power transistor for providing startup power. A primary side control circuit is configured to regulate the output of the SMPS. A secondary side control circuit is coupled to the secondary winding and being configured to provide a first electrical signal to the secondary winding when an output voltage of the SMPS is less than a first reference voltage, whereupon an awakening signal is induced in the auxiliary winding and causes the primary side control circuit to provide a turn-on signal to the power transistor. The primary side control circuit is configured to enter a standby mode or a normal operating mode in response to the awakening signal. | 04-11-2013 |
20130222044 | POWER TRANSISTOR DRIVING CIRCUITS AND METHODS FOR SWITCHING MODE POWER SUPPLIES - A power supply controller is provided for providing a drive current to a control terminal of a power transistor in three time intervals. The controller includes control circuits configured to control the drive current in multiple stages. During a first time interval, first drive current includes a current spike for turning on the power transistor in response to a start of the control signal pulse. During a second time interval, a second drive current includes a ramping current substantially proportional to a magnitude of a current through the power transistor. During a third time interval, current flow to the power transistor is at least partially turned off before an end of the control signal pulse. | 08-29-2013 |
20130343095 | CIRCUITS AND METHODS FOR INCREASING POWER FACTOR OF SWITCH MODE POWER SUPPLY - A switching mode power supply (SMPS) includes a rectifying device configured for converting a periodically varying input AC (alternating current) voltage into a DC (direct current) voltage, and a transformer including a primary winding, a secondary winding, and an auxiliary winding. The primary winding is coupled to the rectifying device. An input capacitor is coupled to the rectifying device and the primary winding of the transformer. A first power switch is coupled to the input capacitor. A control circuit is coupled to the first power switch and is configured to control the first power switch based on a phase or amplitude of the input AC voltage. By controlling the charging and discharging of the input capacitor, power is provided to the primary winding during a longer portion of the AC input voltage cycle, allowing the rectifier device to have a larger conduction angle to increase a power factor (PF). | 12-26-2013 |
20140239930 | CONSTANT-VOLTAGE AND CONSTANT-CURRENT BUCK CONVERTER AND CONTROL CIRCUIT - A control circuit is provided for a buck converter that includes at least an inductor coupled to an output of the buck converter. The control circuit includes a power switch configured for coupling to a line voltage and configured for charging the inductor, an input line voltage sampling circuit, and a constant-voltage (CV) and constant-current (CC) control module coupled to the power switch. During a charging period of the inductor, the CV and CC control module is configured to control the power switch to provide a constant output current by maintaining a constant peak inductor current, even when the input line voltage changes. During a discharging period of the inductor, the CV and CC control module is configured to monitor the sensed output voltage to control the power switch to provide a constant output voltage. | 08-28-2014 |