Patent application number | Description | Published |
20100294571 | CUTTING ELEMENTS, METHODS FOR MANUFACTURING SUCH CUTTING ELEMENTS, AND TOOLS INCORPORATING SUCH CUTTING ELEMENTS - The present disclosure relates to cutting elements incorporating polycrystalline diamond bodies used for subterranean drilling applications, and more particularly, to polycrystalline diamond bodies having a high diamond content which are configured to provide improved properties of thermal stability and wear resistance, while maintaining a desired degree of impact resistance, when compared to prior polycrystalline diamond bodies. In various embodiments disclosed herein, a cutting element with high diamond content includes a modified PCD structure and/or a modified interface (between the PCD body and a substrate), to provide superior performance. | 11-25-2010 |
20100320006 | POLYCRYSTALLINE DIAMOND CUTTING ELEMENTS WITH ENGINEERED POROSITY AND METHOD FOR MANUFACTURING SUCH CUTTING ELEMENTS - A method for facilitating infiltration of an infiltrant material into a TSP material during re-bonding of the TSP material to a substrate, by enhancing the porosity of the TSP material near the interface with the substrate is provided. Cutting elements formed by such method and downhole tools including such cutting elements are also provided. | 12-23-2010 |
20110052803 | Method of Forming Metal Deposits on Ultrahard Materials - A method of forming a metal deposit on an ultra-hard material. In an embodiment, the method includes providing a plurality of ultra-hard particles, mixing the ultra-hard particles in a solution with a metal salt, drying the solution to create a mixture of metal salt particles adhered to surfaces of the ultra-hard particles, heating the mixture to convert the metal salt particles into metal deposits on the surfaces of the ultra-hard particles, and HTHP sintering the mixture of ultra-hard particles with the metal deposits to form a polycrystalline ultra-hard material. | 03-03-2011 |
20120261196 | HIGH DIAMOND FRAME STRENGTH PCD MATERIALS - The present disclosure relates to cutting elements incorporating polycrystalline diamond bodies used for subterranean drilling applications, and more particularly, to polycrystalline diamond bodies having high diamond frame strength and methods for forming and evaluating such polycrystalline diamond bodies. A polycrystalline diamond body is provided, having a top surface, a cutting edge meeting the top surface, and a first region including at least a portion of the cutting edge. The first portion exhibits a diamond frame strength of about 1200 MPa or greater, or about 1300 MPa or greater. | 10-18-2012 |
20140013671 | CUTTING ELEMENTS, METHODS FOR MANUFACTURING SUCH CUTTING ELEMENTS, AND TOOLS INCORPORATING SUCH CUTTING ELEMENTS - The present disclosure relates to cutting elements incorporating polycrystalline diamond bodies used for subterranean drilling applications, and more particularly, to polycrystalline diamond bodies having a high diamond content which are configured to provide improved properties of thermal stability and wear resistance, while maintaining a desired degree of impact resistance, when compared to prior polycrystalline diamond bodies. In various embodiments disclosed herein, a cutting element with high diamond content includes a modified PCD structure and/or a modified interface (between the PCD body and a substrate), to provide superior performance. | 01-16-2014 |
20140069725 | ULTRA-HARD CONSTRUCTIONS WITH EROSION RESISTANCE - Ultra-hard constructions comprise polycrystalline diamond-body having a first metallic substrate attached thereto, and having a second metallic substrate attached to the first metallic substrate. The first and second substrates each comprise a first hard particle phase, e.g., WC, and a second binder material phase, e.g., Co, wherein the hard particles in the second substrate are sized larger than those in the first substrate. The first substrate may contain a larger amount of binder material than the second substrate. Constructed in this matter, the first substrate is engineered to facilitate sintering diamond body during HPHT conditions, while the second substrate is engineered to provide an improved degree of erosion resistance when placed in an end-use application. The construction may be formed during a single HPHT process. The second substrate may comprise 80 percent or more of the combined thickness of the first and second substrates. | 03-13-2014 |
20140110180 | ULTRA-HARD MATERIAL CUTTING ELEMENTS, METHODS OF FORMING THE SAME AND BITS INCORPORATING THE SAME - The present disclosure relates to cutting tools incorporating polycrystalline diamond bodies used for subterranean drilling applications, and more particularly, to a polycrystalline diamond body joined to a substrate by a fastening member to form a cutting element. The polycrystalline diamond body may be binderless polycrystalline diamond, non-metal catalyst polycrystalline diamond, leached polycrystalline diamond, carbonate polycrystalline diamond or polycrystalline cubic boron nitride. The polycrystalline diamond body includes an aperture and a fastening member extending through the aperture and metallurgically bonded to the substrate by a HPHT process. | 04-24-2014 |
20140124271 | CUTTING ELEMENTS, METHODS FOR MANUFACTURING SUCH CUTTING ELEMENTS, AND TOOLS INCORPORATING SUCH CUTTING ELEMENTS - The present disclosure relates to cutting elements incorporating polycrystalline diamond bodies used for subterranean drilling applications, and more particularly, to polycrystalline diamond bodies having a high diamond content which are configured to provide improved properties of thermal stability and wear resistance, while maintaining a desired degree of impact resistance, when compared to prior polycrystalline diamond bodies. In various embodiments disclosed herein, a cutting element with high diamond content includes a modified PCD structure and/or a modified interface (between the PCD body and a substrate), to provide superior performance. | 05-08-2014 |
20140290146 | POLYCRYSTALLINE DIAMOND CUTTING ELEMENTS WITH ENGINEERED POROSITY AND METHOD FOR MANUFACTURING SUCH CUTTING ELEMENTS - A method for facilitating infiltration of an infiltrant material into a TSP material during re-bonding of the TSP material to a substrate, by enhancing the porosity of the TSP material near the interface with the substrate is provided. Cutting elements formed by such method and downhole tools including such cutting elements are also provided. | 10-02-2014 |
20150292271 | HIGH DIAMOND FRAME STRENGTH PCD MATERIALS - The present disclosure relates to cutting elements incorporating polycrystalline diamond bodies used for subterranean drilling applications, and more particularly, to polycrystalline diamond bodies having high diamond frame strength and methods for forming and evaluating such polycrystalline diamond bodies. A polycrystalline diamond body is provided, having a top surface, a cutting edge meeting the top surface, and a first region including at least a portion of the cutting edge. The first portion exhibits a diamond frame strength of about 1200 MPa or greater, or about 1300 MPa or greater. | 10-15-2015 |
Patent application number | Description | Published |
20080254213 | Controlling ultra hard material quality - A method is provided for controlling the consistency of the quality of ultra hard materials formed over tungsten carbide substrates formed from different batches of tungsten carbide powder by controlling the tungsten carbide particle size distribution in each batch. | 10-16-2008 |
20100084197 | DIAMOND BONDED CONSTRUCTION WITH THERMALLY STABLE REGION - Diamond bonded constructions comprise a polycrystalline diamond body having a matrix phase of bonded-together diamond grains and a plurality of interstitial regions between the diamond grains including a catalyst material used to form the diamond body disposed within the interstitial regions. A sintered thermally stable diamond element is disposed within and bonded to the diamond body, and is configured and positioned to form part of a working surface. The thermally stable diamond element is bonded to the polycrystalline diamond body, and a substrate is bonded to the polycrystalline diamond body. The thermally stable diamond element comprises a plurality of bonded-together diamond grains and interstitial regions, wherein the interstitial regions are substantially free of a catalyst material used to make or sinter the thermally stable diamond element. A barrier material may be disposed over or infiltrated into one or more surfaces of the thermally stable diamond element. | 04-08-2010 |
20110036643 | THERMALLY STABLE POLYCRYSTALLINE DIAMOND CONSTRUCTIONS - Thermally stable polycrystalline constructions comprise a diamond body joined with a substrate, and may have a nonplanar interface. The construction may include an interlayer interposed between the diamond body and substrate. The diamond body preferably has a thickness greater than about 1.5 mm, and comprises a matrix phase of bonded together diamond crystals and interstitial regions disposed therebetween that are substantially free of a catalyst material used to sinter the diamond body. A replacement material is disposed within the interstitial regions. A population of the interstitial regions may include non-solvent catalyst material and/or an infiltrant aid disposed therein. The diamond body comprises two regions; namely, a first region comprising diamond grains that may be sized smaller than diamond grains in a second region, and/or the first region may comprise a diamond volume that is greater than that in the second region. | 02-17-2011 |
20120097458 | DIAMOND BONDED CONSTRUCTION WITH THERMALLY STABLE REGION - Diamond bonded constructions comprise a polycrystalline diamond body having a matrix phase of bonded-together diamond grains and a plurality of interstitial regions between the diamond grains including a catalyst material used to form the diamond body disposed within the interstitial regions. A sintered thermally stable diamond element is disposed within and bonded to the diamond body, and is configured and positioned to form part of a working surface. The thermally stable diamond element is bonded to the polycrystalline diamond body, and a substrate is bonded to the polycrystalline diamond body. The thermally stable diamond element comprises a plurality of bonded-together diamond grains and interstitial regions, wherein the interstitial regions are substantially free of a catalyst material used to make or sinter the thermally stable diamond element. A barrier material may be disposed over or infiltrated into one or more surfaces of the thermally stable diamond element. | 04-26-2012 |
20120103699 | INTERFACE DESIGN OF TSP SHEAR CUTTERS - A method of forming a cutting element is disclosed, wherein the method includes forming a substrate body, forming an intermediate layer on the substrate body, forming a diamond table, and positioning the diamond table on the intermediate layer, such that the intermediate layer is disposed between the substrate body and the diamond table. The intermediate layer has a base portion having a base height and a ring portion having a ring height H | 05-03-2012 |
20120125696 | Polycrystalline Diamond Constructions Having Optimized Material Composition - Diamond bonded constructions include a diamond body comprising intercrystalline bonded diamond and interstitial regions. The body has a working surface and an interface surface, and may be joined to a metallic substrate. The body has a gradient diamond volume content greater about 1.5 percent, wherein the diamond content at the interface surface is less than 94 percent, and increases moving toward the working surface. The body may include a region that is substantially free of a catalyst material otherwise disposed within the body and present in a gradient amount. An additional material may be included within the body and be present in a changing amount. The body may be formed by high-pressure HPHT processing, e.g., from 6,200 MPa to 10,000 MPa, to produce a sintered body having a characteristic diamond volume fraction v. average grain size relationship distinguishable from that of diamond bonded constructions form by conventional-pressure HPHT processing. | 05-24-2012 |
20130146369 | DIAMOND BONDED CONSTRUCTION WITH THERMALLY STABLE REGION - Diamond bonded constructions comprise a polycrystalline diamond body having a matrix phase of bonded-together diamond grains and a plurality of interstitial regions between the diamond grains including a catalyst material used to form the diamond body disposed within the interstitial regions. A sintered thermally stable diamond element is disposed within and bonded to the diamond body, and is configured and positioned to form part of a working surface. The thermally stable diamond element is bonded to the polycrystalline diamond body, and a substrate is bonded to the polycrystalline diamond body. The thermally stable diamond element comprises a plurality of bonded-together diamond grains and interstitial regions, wherein the interstitial regions are substantially free of a catalyst material used to make or sinter the thermally stable diamond element. A barrier material may be disposed over or infiltrated into one or more surfaces of the thermally stable diamond element. | 06-13-2013 |
20140116791 | DIAMOND BONDED CONSTRUCTION WITH THERMALLY STABLE REGION - Diamond bonded constructions comprise a polycrystalline diamond body having a matrix phase of bonded-together diamond grains and a plurality of interstitial regions between the diamond grains including a catalyst material used to form the diamond body disposed within the interstitial regions. A sintered thermally stable diamond element is disposed within and bonded to the diamond body, and is configured and positioned to form part of a working surface. The thermally stable diamond element is bonded to the polycrystalline diamond body, and a substrate is bonded to the polycrystalline diamond body. The thermally stable diamond element comprises a plurality of bonded-together diamond grains and interstitial regions, wherein the interstitial regions are substantially free of a catalyst material used to make or sinter the thermally stable diamond element. A barrier material may be disposed over or infiltrated into one or more surfaces of the thermally stable diamond element. | 05-01-2014 |
20140215927 | POLYCRYSTALLINE DIAMOND CONSTRUCTIONS HAVING OPTIMIZED MATERIAL COMPOSITION - Diamond bonded constructions include a diamond body comprising intercrystalline bonded diamond and interstitial regions. The body has a working surface and an interface surface, and may be joined to a metallic substrate. The body has a gradient diamond volume content greater about 1.5 percent, wherein the diamond content at the interface surface is less than 94 percent, and increases moving toward the working surface. The body may include a region that is substantially free of a catalyst material otherwise disposed within the body and present in a gradient amount. An additional material may be included within the body and be present in a changing amount. The body may be formed by high-pressure HPHT processing, e.g., from 6,200 MPa to 10,000 MPa, to produce a sintered body having a characteristic diamond volume fraction v. average grain size relationship distinguishable from that of diamond bonded constructions form by conventional-pressure HPHT processing. | 08-07-2014 |
Patent application number | Description | Published |
20090256843 | SYSTEM AND METHOD FOR ACTIVE SELECTION IN A SOLID MODEL - A system, method, and computer program for selecting modification features on a solid model that is manipulated in a computer having software instructions, comprising: a computer system, wherein the computer system includes a memory, a processor, a user input device, and a display device; a computer generated geometric model stored in the memory in the memory of the computer system; and wherein the computer system selects a modification feature directly on a solid model using a computer peripheral input that communicates a modification intent from a user; suggests a plurality of additional selection features to include with the modification feature; verifies that the included plurality of additional selection features conforms to the modification intent by a visual highlighting; modifies the solid model according to the modification intent that results in a modified solid model and modified visual display information; and displays the modified solid model using the modified visual display information to the user; and appropriate means and computer-readable instructions. | 10-15-2009 |
20100305906 | CAD SYSTEM AND METHOD FOR BLEND RECOGNITION AND CHAIN SORTING IN A BREP MODEL - A CAD system, method, and computer readable medium. A method includes loading a CAD object including a plurality of faces, and identifying a plurality of candidate faces from the plurality of faces. The candidate faces can include candidate blends. The method includes combining multiple ones of the candidate faces into a candidate blend chain, including at least one candidate blend. The method includes replacing the candidate blends with accurate blends to produce a corrected blend chain, and storing the corrected blend chain with the accurate blends as part of the CAD object. | 12-02-2010 |
20130054198 | NOTCH BLENDS IN BREP MODELS - Methods for computer-aided design and visualization and corresponding systems and computer-readable mediums. A method includes receiving a BRep model and recognizing a plurality of notch or cliff blends in the BRep model. The method includes defining a chain of at least two of the plurality of notch blends. The method includes labeling the notch blends in the chain. The method includes storing the BRep model, including one or more of the recognized notch blends, the chain, and the labels of the notch blends. | 02-28-2013 |
20130289946 | CURVE CHAIN CONNECTIONS UNDER SURFACE, DISTANCE, AND SHAPE CONSTRAINTS - Product data management systems, methods, and mediums. A method includes receiving a graphic model having a plurality of curves forming a curve chain and defining a distance threshold and angle threshold corresponding to the model. The method includes optimizing the curve chain under shape constraints, identifying a surface associated with the curve chain and optimizing the curve chain with under surface and distance constraints with respect to the identified surface. The method includes storing the graphic model with the optimized curve chain. | 10-31-2013 |
20130297268 | DETERMINING BOOLEAN REGION PARTICIPANTS FOR A NOTIONAL CONTEXT GIVEN ARBITRARY BODIES - Product Data Management (PDM) systems and methods. A method includes receiving a target body and a tool body, and evaluating a body type of the target body and a body type of the tool body. The method includes evaluating interactions between the target body and the tool body, and applying comparison criteria to determine spatial relation and relative convexity of an intersection between the target body and the tool body. The method includes identifying tool face regions of the tool body based on the evaluations and the determined spatial relation and relative convexity of the intersection. The method includes adding the tool face regions to the target body to produce a modified target body. | 11-07-2013 |
20150261889 | LOCAL BEHAVIOR IN A VARIATIONAL SYSTEM - Methods for CAD editing and corresponding systems and computer-readable mediums. A method includes receiving a CAD model including a plurality of entities and receiving a user input including a selection of at least one entity and a movement of the selected entity. The method includes applying any basic condition behaviors that correspond to the user input and applying any optional condition behaviors that correspond to the user input. The method includes building a variational system to be solved based on the user input, any applied basic condition behaviors, and any optional condition behaviors. The method includes performing a variational solve on the variational system to produce an edited CAD model and storing the edited CAD model. | 09-17-2015 |
20160078151 | MODELING OF BLENDS ON A SOLID MODEL OF A POCKET - Methods for accurately modeling blends in a solid model and corresponding systems and computer-readable mediums. A method includes receiving a solid model including a plurality of faces and identifying a pocket from the plurality of faces, including one or more pocket edges to be blended. The method includes performing an analyze pockets process on the pocket and identifying at least one of a tool type, a tool method, or a tool dimension for machining the pocket. The method includes performing a blend pocket process to model blends on the pocket edge and adding a blend to the solid model at the pocket edges, according to the blend pocket process, to produce a modified solid model. The method includes displaying the modified solid model by the data processing system. | 03-17-2016 |
Patent application number | Description | Published |
20100228627 | Method, System and Apparatus for Electronic Business Suited for Conventional Retailing - An electronic business method and system suited for conventional retailers are disclosed. A business transaction server receives from a seller an order form of a product, stores the received order form, assigns an order identification to the product, and communicates the order identification to the seller, who advertises the product with the order identification in any desirable manner including conventional advertising venues such as printed materials. The business transaction server receives from a buyer a purchase order containing the order identification and payment information, and notifies the seller to ship the product to the buyer according to the purchase order. The seller can be a conventional retailer and does not have to rely on Internet for advertisement in order to take advantage of electronic business transactions. | 09-09-2010 |
20100287068 | Online Transaction Method and System Using a Payment Platform and a Logistics Company - The disclosed online transaction method and system uses payment platform acting as an intermediary agent between the merchant and the shipping company to handle the payment. While the payment platform receives payment from the shipping company, the merchant receives payment from the payment platform. The method and system do not require buyers to use the payment method provided by an intermediary transaction platform to make a payment. Instead, the buyer may pay directly to the shipping company. Unlike conventional transaction method based on COD, however, the disclosed online transaction method and system centrally manage a logistics platform or multiple logistics operations run by logistics companies. The merchant does not receive the payment from the logistics company, but rather receive the payment from a centralized payment platform to ensure secure and fast payment. | 11-11-2010 |
20130207560 | MULTI-OUTPUT CURRENT-BALANCING CIRCUIT - The present invention relates to a multi-output current-balancing circuit, which in one embodiment can include: (i) a transformer having a primary winding and a plurality of secondary windings, where the primary winding receives an AC input current; (ii) a plurality of first and second rectifier circuits and a plurality of first current balancing components, where each of the first and second rectifier circuits and the first current balancing components is coupled to a corresponding secondary winding, where each the first current balancing component is configured for current balancing between each of the first and second rectifier circuits of the corresponding secondary winding; and (iii) at least one second current balancing component, where each second current balancing component is coupled to a pair of the second rectifier circuits that correspond to different secondary windings, where the second current balancing components are configured for current balancing between different the secondary windings. | 08-15-2013 |
20140021879 | DIMMABLE LED DRIVER AND DRIVING METHOD - Disclosed are dimmable LED driver circuits and methods. A dimmable LED driver can include: an SCR, an electronic transformer, and a rectifier bridge to convert an AC voltage to a DC voltage signal; a power stage circuit that receives the DC voltage signal, and outputs a constant current to drive an LED load, where the power stage circuit includes first and second power stage circuits, the first power stage circuit receiving the DC voltage signal, and generating a first output voltage to the second power stage; and an input current control circuit that receives an input current of the first power stage circuit and the first output voltage, and generates a first control signal to control the input current as a square wave signal during an on time of the SCR, and the input current is substantially zero during an off time of the SCR. | 01-23-2014 |
20140062322 | CONTROLLED-SILICON ADAPTING LED DRIVING CIRCUIT, METHOD AND SWITCH MODE POWER SUPPLY - Disclosed are light-emitting diode (LED) driver circuits, methods, and a switch mode power supply. In one embodiment, an LED driver can include: (i) a silicon-controlled rectifier (SCR) and a rectifier bridge configured to receive an AC voltage, and to generate a phase-loss half sine wave voltage signal; (ii) a threshold voltage control circuit configured to receive a threshold voltage and an input voltage signal that represents the phase-loss half sine wave voltage signal, and to determine whether to output the threshold voltage based on angle information of the input voltage signal; (iii) a first control circuit configured to compare the input voltage signal against the threshold voltage output by the threshold voltage control circuit, and to generate a first control signal; and (iv) a power switch controllable by the first control signal to be off until an absolute value of the AC voltage is reduced to zero. | 03-06-2014 |
20140095381 | ONLINE TRANSACTION METHOD AND SYSTEM USING A PAYMENT PLATFORM AND A LOGISTICS COMPANY - The disclosed online transaction method and system uses payment platform acting as an intermediary agent between the merchant and the shipping company to handle the payment. While the payment platform receives payment from the shipping company, the merchant receives payment from the payment platform. The method and system do not require buyers to use the payment method provided by an intermediary transaction platform to make a payment. Instead, the buyer may pay directly to the shipping company. Unlike conventional transaction method based on COD, however, the disclosed online transaction method and system centrally manage a logistics platform or multiple logistics operations run by logistics companies. The merchant does not receive the payment from the logistics company, but rather receive the payment from a centralized payment platform to ensure secure and fast payment. | 04-03-2014 |
20140139129 | THYRISTOR DIMMING CIRCUIT WITH LOSSLESS DISCHARGING CIRCUIT AND METHOD THEREOF - Thyristor dimming circuits and methods are disclosed herein. In one embodiment, a thyristor dimming circuit can include: (i) a thyristor and a rectifier bridge configured to receive a sinusoidal AC voltage, and to generate a phase-loss input voltage; (ii) a power stage circuit configured to have the phase-loss input voltage applied thereto, the power stage circuit having a main switch and being configured to drive a lamp load through electrical conversion; and (iii) a discharging circuit configured, during a first predetermined time interval, to control the main switch to operate with a fixed duty cycle at a fixed frequency, where the first predetermined time interval begins prior to an absolute value of the sinusoidal AC voltage being reduced to zero, the first predetermined time interval ending when the phase-loss input voltage is again applied to the power stage circuit. | 05-22-2014 |
20140163910 | BATTERY POWER MEASURING METHOD, MEASURING DEVICE AND BATTERY-POWERED EQUIPMENT - Disclosed herein are various battery power measurement devices, methods, and related apparatuses. In one embodiment, a method of measuring a battery power can include: (i) detecting a voltage and a temperature at an output terminal of a battery; (ii) obtaining a first correction coefficient based on a battery open-circuit voltage at a previous sample time; (iii) obtaining a second correction coefficient based on the battery temperature; (iv) calculating a real-time battery open-circuit voltage by using the voltage at the output terminal of the battery, the first and second correction coefficients, the battery open-circuit voltage at the previous sample time, and a time interval between the previous sample time and a present sample time; and (v) converting the real-time battery open-circuit voltage into a battery power measurement for display. | 06-12-2014 |
20140176107 | FAST RESPONSE CONTROL CIRCUIT AND CONTROL METHOD THEREOF - In one embodiment, a control circuit configured to control a switch mode power supply, can include: (i) a compensation signal generating circuit configured to generate a compensation signal according to an error between an output voltage feedback signal and a first reference voltage of the switch mode power supply; (ii) a switching signal generating circuit configured to control a switching operation of a power switching device of the switch mode power supply according to the compensation signal; (iii) a judge circuit configured to determine an operation state of the switch mode power supply according to the output voltage feedback signal; and (iv) a loop gain regulating circuit configured to regulate a loop gain of the control circuit according to the operation state. | 06-26-2014 |
20140203719 | MULTI-OUTPUT CURRENT-BALANCING CIRCUIT - The present invention relates to a multi-output current-balancing circuit, which in one embodiment can include: (i) a transformer having a primary winding and a plurality of secondary windings, where the primary winding receives an AC input current; (ii) a plurality of first and second rectifier circuits and a plurality of first current balancing components, where each of the first and second rectifier circuits and the first current balancing components is coupled to a corresponding secondary winding, where each the first current balancing component is configured for current balancing between each of the first and second rectifier circuits of the corresponding secondary winding; and (iii) at least one second current balancing component, where each second current balancing component is coupled to a pair of the second rectifier circuits that correspond to different secondary windings, where the second current balancing components are configured for current balancing between different the secondary windings. | 07-24-2014 |
20140354166 | DIMMING CIRCUIT AND METHOD FOR LEDS - The present disclosure relates to dimming circuit and method for LEDs. The dimming circuit obtains a DC voltage from an external AC power supply by using a TRIAC, an electronic transformer, and a rectifier bridge sequentially. The dimming circuit comprises a first power stage circuit, a second power stage, a first control circuit, and a second control circuit. The first power stage circuit has an input terminal configured to receive the DC voltage. The second power stage has an input terminal coupled to an output terminal of the first power stage and an output terminal coupled to an LED load. The first control circuit is configured to generate a first control signal in accordance with a first output voltage generated at the output terminal of the first power stage circuit, a first reference voltage and an upper threshold voltage to maintain an average value of the first output voltage to be consistent with the first reference voltage. The second control circuit is configured to generate a dimming signal in accordance with a first current and the first output voltage to control an operation of the second power stage circuit to maintain an output current of the second power stage circuit to be consistent with an expected driving current represented by the dimming signal. The first current is no less than a holding current of the electronic transformer. An input current of the first power stage circuit is maintained to be consistent with the first current by the first control signal when the first output voltage is in a continuously increasing state and is lower than the upper threshold voltage. The first output voltage decreases continuously and the input current is maintained to be consistent with a second current after the first output voltage reaches the upper threshold voltage. | 12-04-2014 |
20150077072 | CONTROL CIRCUIT OF INTERLEAVED SWITCHING POWER SUPPLY AND CONTROL METHOD THEREOF - In one embodiment, a control circuit configured for an interleaved switching power supply, can include: (i) a feedback compensation signal generation circuit configured to sample an output voltage of the interleaved switching power supply, and to generate a feedback compensation signal; (ii) a first switch control circuit configured to compare a first branch voltage signal that represents an inductor current of a first voltage regulation circuit against the feedback compensation signal, where when the first branch voltage signal is consistent with the feedback compensation signal, a first switch on signal is generated to control a first main power switch of the first voltage regulation circuit to be on for a predetermined time, and then off; and (iii) a second switch control circuit configured to compare a second branch voltage signal that represents an inductor current of a second voltage regulation circuit against the feedback compensation signal. | 03-19-2015 |
20150077073 | CONTROL CIRCUIT OF INTERLEAVED SWITCHING POWER SUPPLY - In one embodiment, a control circuit configured for an interleaved switching power supply having first and second voltage conversion circuits, can include: a feedback compensation signal generation circuit that generates a feedback compensation signal; a first power switch control circuit that activates a first on signal when a first voltage signal that represents an inductor current of the first voltage conversion circuit is less than the feedback compensation signal, a first power switch of the first voltage conversion circuit being turned on based on the first on signal, and turned off after a predetermined time; and a second power switch control circuit that activates a second on signal after half of a switching period from a rising edge of the first on signal, and a second power switch control signal to turn on a second power switch of the second voltage conversion circuit based on the second on signal. | 03-19-2015 |
20150091455 | LED DRIVER - A LED driver is disclosed herein. In one embodiment, the LED driver comprises a rectifier circuit, a driving current generating circuit, a bus voltage detection circuit, a LED configuration control circuit, and a LED array. The LED driver according to the present disclosure reconfigures the prior LED array, balances usage of each LED by switching operation of each LED, which results in long lifetime of the LED driver while reducing power dissipation or increasing a PF value. | 04-02-2015 |
20150115917 | CONTROL CIRCUIT FOR INTERLEAVED SWITCHING POWER SUPPLY - In one embodiment, a control circuit configured for an interleaved switching power supply, can include: (i) a feedback compensation signal generation circuit configured to sample an output voltage of the interleaved switching power supply, and to generate a feedback compensation signal; (ii) a first switch control circuit configured to compare a voltage signal indicative of an inductor current in the first voltage regulation circuit against the feedback compensation signal, and to control a first main power switch in the first voltage regulation circuit; and (iii) a second switch control circuit configured to turn on a second main power switch in the second voltage regulation circuit after half of a switching cycle after the first main power switch is turned on, and to regulate an on time of the second main power switch. | 04-30-2015 |
20150324579 | METHOD, APPARATUS, AND SYSTEM FOR MANAGING USER ACCOUNTS - Embodiments of the present application relate to a method and system for managing user accounts. The method includes receiving a registration request from a current user, wherein the registration request comprises a login name main part, determining, in a database, whether a conflicting old user exists, wherein a conflicting old user corresponds to another user that has a conflicting login name main part that is the same as the login name main part received in connection with the registration request, in the event that a conflicting old user exists, executing a login password differentiation process that requires a user to register a different login password that is different from a login password associated with the conflicting old user, and storing the different login password to the database in connection with a registration of the current user. | 11-12-2015 |
20150364927 | RESONANT CONTACTLESS POWER SUPPLY EQUIPMENT, ELECTRICAL TRANSMITTER AND CONTACTLESS POWER SUPPLY METHOD - A resonant contactless electric energy transmitter configured to contactlessly supply electric energy to an electric energy receiver, can include: (i) a high frequency power supply configured to generate a high frequency AC power with a frequency that is the same as a leakage inductance resonant frequency, where the leakage resonant frequency is obtained by detection of an output current of the high frequency power supply that corresponds to the high frequency AC power of a sequence of different frequencies during a frequency sweeping time period; and (ii) a transmitting resonant circuit comprising a transmitting coil, and being configured to receive the high frequency AC power from the high frequency power supply. | 12-17-2015 |
20150380944 | POWER SUPPLY DEVICE, INTEGRATED CIRCUIT, ENERGY TRANSMITTER AND IMPEDANCE MATCHING METHOD - A resonance contactless power supply device can include: (i) a converter configured to convert an input power signal to an adjustable DC voltage; (ii) an inverter configured to receive the adjustable DC voltage, and to generate an AC voltage with a leakage inductance resonance frequency; (iii) a first resonance circuit having a transmitting coil, and being configured to receive the AC voltage from the inverter; (iv) a second resonance circuit comprising a receiving coil that is contactlessly coupled to the transmitting coil, where the second resonance circuit is configured to receive electric energy from the transmitting coil; and (v) a control circuit configured to control the adjustable DC voltage according to a phase difference between the AC voltage and an AC current output by the inverter, such that the phase difference is maintained as a predetermined angle. | 12-31-2015 |
20150380947 | RESONANCE-TYPE CONTACTLESS POWER SUPPLY AND POWER RECEIVER - The present disclosure relates to a resonance-type contactless power supply and a power receiver. A high-frequency power supply provides a high-frequency AC current with a predetermined frequency. A transmitter-side resonant circuit includes a transmitting coil for receiving the high-frequency AC current from the high-frequency power supply. A receiver-side resonant circuit includes a receiving coil which is separated from but coupled to the transmitting coil in contactless manner. The receiver-side resonant circuit receives electric energy from the transmitting coil. A receiver-side parallel capacitor is connected in parallel at an output terminal of the receiver-side resonant circuit. The receiver-side parallel capacitor has a capacitance value which is in inversely proportional to the product of a square of an angular frequency of the predetermined frequency and a predetermined mutual inductance. The predetermined mutual inductance is determined in a case that the transmitting coil and the receiving coil are coupled to each other in a predetermined coupling coefficient. The resonance-type contactless power supply provides a stable output voltage when operating in the predetermined frequency. | 12-31-2015 |
20150382423 | DIMMABLE LED DRIVER AND DRIVING METHOD - Disclosed are dimmable LED driver circuits and methods. A dimmable LED driver can include: an SCR, an electronic transformer, and a rectifier bridge to convert an AC voltage to a DC voltage signal; a power stage circuit that receives the DC voltage signal, and outputs a constant current to drive an LED load, where the power stage circuit includes first and second power stage circuits, the first power stage circuit receiving the DC voltage signal, and generating a first output voltage to the second power stage; and an input current control circuit that receives an input current of the first power stage circuit and the first output voltage, and generates a first control signal to control the input current as a square wave signal during an on time of the SCR, and the input current is substantially zero during an off time of the SCR. | 12-31-2015 |
20160044755 | DIMMING CIRCUIT AND METHOD FOR LEDS - The present disclosure relates to dimming circuit and method for LEDs. The dimming circuit obtains a DC voltage from an external AC power supply by using a TRIAC, an electronic transformer, and a rectifier bridge sequentially. The dimming circuit comprises a first power stage circuit, a second power stage, a first control circuit, and a second control circuit. The first power stage circuit has an input terminal configured to receive the DC voltage. The second power stage has an input terminal coupled to an output terminal of the first power stage and an output terminal coupled to an LED load. The first control circuit is configured to generate a first control signal in accordance with a first output voltage generated at the output terminal of the first power stage circuit, a first reference voltage and an upper threshold voltage to maintain an average value of the first output voltage to be consistent with the first reference voltage. The second control circuit is configured to generate a dimming signal in accordance with a first current and the first output voltage to control an operation of the second power stage circuit to maintain an output current of the second power stage circuit to be consistent with an expected driving current represented by the dimming signal. The first current is no less than a holding current of the electronic transformer. An input current of the first power stage circuit is maintained to be consistent with the first current by the first control signal when the first output voltage is in a continuously increasing state and is lower than the upper threshold voltage. The first output voltage decreases continuously and the input current is maintained to be consistent with a second current after the first output voltage reaches the upper threshold voltage. | 02-11-2016 |