Patents by Inventor Jian Tian
Jian Tian has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9680008Abstract: A transistor advantageously embodied in a laterally diffused metal oxide semiconductor device having a gate located over a channel region recessed into a semiconductor substrate and a method of forming the same. In one embodiment, the laterally diffused metal oxide semiconductor device includes a source/drain having a lightly doped region located adjacent the channel region and a heavily doped region located adjacent the lightly doped region. The laterally diffused metal oxide semiconductor device further includes an oppositely doped well located under and within the channel region, and a doped region, located between the heavily doped region and the oppositely doped well, having a doping concentration profile less than a doping concentration profile of the heavily doped region.Type: GrantFiled: April 15, 2014Date of Patent: June 13, 2017Assignee: Empirion, Inc.Inventors: Ashraf W. Lotfi, Jian Tian
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Patent number: 9660510Abstract: The invention relates to a voltage converter (1) for a motor vehicle. Said voltage converter (1) comprises a transformer (10) and a power output stage (7). The power output stage (7) comprises at least two semiconductor switches (20, 22, 24, 26) that are connected to the transformer (10), in particular to a primary winding (12) of said transformer (10). The voltage converter (1) has a driver stage (31) which is connected, on the output side, to a control connection of the semiconductor switch (20, 22, 24, 26) and which is designed to actuate said semiconductor switch (20, 22, 24, 26) using a control signal (93, 94), for the purpose of generating an alternating voltage. According to the invention, the driver stage (31) is connected, on the input side, to a pulse signal generator (35) and an input capacitor (60, 62).Type: GrantFiled: November 29, 2012Date of Patent: May 23, 2017Assignee: Robert Bosch GmbHInventors: Stefan Koch, Jian Tian, Ralf-Peter Bergmann
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Publication number: 20170092839Abstract: The present invention generally relates to high frequency piezoelectric crystal composites, devices, and method for manufacturing the same. In adaptive embodiments an improved imaging device, particularly a medical imaging device or a distance imaging device, for high frequency (>20 MHz) applications involving an imaging transducer assembly is coupled to a signal imagery processor. Additionally, the proposed invention presents a system for photolithography based micro-machined piezoelectric crystal composites and their uses resulting in improved performance parameters.Type: ApplicationFiled: December 8, 2016Publication date: March 30, 2017Applicant: CTS CorporationInventors: Pengdi Han, Jian Tian, Kevin Meneou, Brandon Stone
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Publication number: 20170060281Abstract: The present disclosure relates to the field of display technology, and provides a substrate, a method for manufacturing the same and a display device. The substrate includes a signal line and a GND line configured to remove static charges on the signal line.Type: ApplicationFiled: April 14, 2016Publication date: March 2, 2017Applicants: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventors: Xiaodong XIE, Ming HU, Ming ZHANG, Juntao CHEN, Jian TIAN
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Patent number: 9525124Abstract: The present invention generally relates to high frequency piezoelectric crystal composites, devices, and method for manufacturing the same. In adaptive embodiments an improved imaging device, particularly a medical imaging device or a distance imaging device, for high frequency (>20 MHz) applications involving an imaging transducer assembly is coupled to a signal imagery processor. Additionally, the proposed invention presents a system for photolithography based micro-machined piezoelectric crystal composites and their uses resulting in improved performance parameters.Type: GrantFiled: September 6, 2013Date of Patent: December 20, 2016Assignee: CTS CorporationInventors: Pengdi Han, Jian Tian, Kevin Meneou, Brandon Stone
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Patent number: 9519269Abstract: The present invention generally relates to high frequency piezoelectric crystal composites, devices, and method for manufacturing the same. In adaptive embodiments an improved imaging device, particularly a medical imaging device or a distance imaging device, for high frequency (>20 MHz) applications involving an imaging transducer assembly is coupled to a signal imagery processor. Additionally, the proposed invention presents a system for photolithography based micro-machined piezoelectric crystal composites and their uses resulting in improved performance parameters.Type: GrantFiled: October 13, 2011Date of Patent: December 13, 2016Assignee: CTS CORPORATIONInventors: Pengdi Han, Jian Tian, Kevin Meneou, Brandon Stone
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Patent number: 9467059Abstract: The invention relates to an activation apparatus (20) for a galvanically decoupled direct voltage converter having a synchronous rectifier, comprising a signal generating device (22), which is designed to generate control signals (22c, 22d) for switch devices of the synchronous rectifier and a reference current signal (22b), a first comparator device (23), which is coupled to the signal generating device (22), and which is designed to detect the secondary-side output current (Jo) of the synchronous rectifier, compare it to the reference current signal (22b) and generate a current control signal in dependence on the comparison, and a pulse width modulation device (25), which is coupled to the signal generating device (22) and the first comparator device (23) and which is designed to generate pulse width modulated activation signals (25a) for the switch devices of the synchronous rectifier on the basis of the control signals (22c, 22d) and the current control signal, wherein the signal generating device (22) isType: GrantFiled: August 2, 2012Date of Patent: October 11, 2016Assignee: Robert Bosch GmbHInventors: Eric Hueckel, Stefan Koch, Florian Lieblang, Stephan Binhack, Tobias Pristl, Michael Zeller, Stephan Mueller, Jian Tian, Ralf Bochat, Ralf-Peter Bergmann
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Publication number: 20160251773Abstract: This invention includes a system and a method for growing crystals including a batch auto-feeding mechanism. The proposed system and method provide a minimization of compositional segregation effect during crystal growth by controlling growth rate involving a high-temperature flow control system operable in an open and a closed loop crystal growth process. The ability to control the growth rate without corresponding loss of volatilize-able elements enables significantly improvement in compositional homogeneity and a consequent increase in crystal yield. This growth system and method can be operated in production scale, simultaneously for a plurality of growth crucibles to further the reduction of manufacturing costs, particularly for the crystal materials of binary or ternary systems with volatile components, such as Lead (Pb) and Indium (In).Type: ApplicationFiled: November 16, 2015Publication date: September 1, 2016Applicant: CTG ADVANCED MATERIALS, LLCInventors: Pengdi HAN, Jian TIAN
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Patent number: 9401598Abstract: The invention relates to a control unit for a motor vehicle. Said control unit comprises a voltage converter which has an inlet for a direct voltage network. Said voltage converter is designed to generate a direct voltage smaller than an input voltage on the inlet for the direct voltage network and the direct voltage is emitted on the outlet side. According to the invention, the voltage converter comprises an inverter and a transformer which is connected to said inverter. Said voltage converter also comprises an inlet for a discharge signal and is designed to discharge by means of the inverter an intermediate circuit capacitor which is connected to the inlet of the direct voltage network in accordance with the discharge signal, and to reduce a working frequency of the inverter, in particular, compared to the frequency with no discharge signal.Type: GrantFiled: September 26, 2012Date of Patent: July 26, 2016Assignee: Robert Bosch GmbHInventors: Stefan Koch, Jian Tian, Ralf-Peter Bergmann, Stephan Mueller
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Patent number: 9260794Abstract: This invention includes a system and a method for growing crystals including a batch auto-feeding mechanism. The proposed system and method provide a minimization of compositional segregation effect during crystal growth by controlling growth rate involving a high-temperature flow control system operable in an open and a closed loop crystal growth process. The ability to control the growth rate without corresponding loss of volatilize-able elements enables significantly improvement in compositional homogeneity and a consequent increase in crystal yield. This growth system and method can be operated in production scale, simultaneously for a plurality of growth crucibles to further the reduction of manufacturing costs, particularly for the crystal materials of binary or ternary systems with volatile components, such as Lead (Pb) and Indium (In).Type: GrantFiled: April 30, 2014Date of Patent: February 16, 2016Assignee: CTG ADVANCED MATERIALS, LLCInventors: Pengdi Han, Jian Tian
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Patent number: 9178429Abstract: A DC-DC converter including a transformer having a primary-side winding and a secondary-side winding with a center tap, and a storage choke. A rectifier circuit is connected to each of the taps at the ends of the secondary-side winding and generates a rectified output voltage at a second output of said DC-DC converter. A snubber circuit is switched via the rectifier circuit and stores energy occurring in said rectifier circuit. (An actuation apparatus includes a switching time determining device designed to determine a time interval as a function of the output voltage, the charge stored in the snubber circuit and the current fluctuations of the current through the storage choke occurring as a result of the rectification. A storage signal generator generates an actuation signal for discharging the snubber circuit as a function of the determined time interval.Type: GrantFiled: February 21, 2013Date of Patent: November 3, 2015Assignee: Robert Bosch GmbHInventors: Jian Tian, Stefan Koch, Ralf-Peter Bergmann
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Patent number: 9119769Abstract: The present invention provides gas-induced method for phase-transforming organic solids, such as pharmaceutical crystals. The inventive method subjects the polymorphs of pharmaceutical agents to various pressures of gases (such as CO2, N2O, and CH4) to induce phase transform with ease.Type: GrantFiled: December 20, 2012Date of Patent: September 1, 2015Assignee: The Curators of the University of MissouriInventors: Jerry Lee Atwood, Jian Tian, Scott John Dagarno
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Publication number: 20150159296Abstract: This invention includes a system and a method for growing crystals including a batch auto-feeding mechanism. The proposed system and method provide a minimization of compositional segregation effect during crystal growth by controlling growth rate involving a high-temperature flow control system operable in an open and a closed loop crystal growth process. The ability to control the growth rate without corresponding loss of volatilize-able elements enables significantly improvement in compositional homogeneity and a consequent increase in crystal yield. This growth system and method can be operated in production scale, simultaneously for a plurality of growth crucibles to further the reduction of manufacturing costs, particularly for the crystal materials of binary or ternary systems with volatile components, such as Lead (Pb) and Indium (In).Type: ApplicationFiled: April 30, 2014Publication date: June 11, 2015Applicants: H.C. MATERIALS CORPORATION, CTG ADVANCED MATERIALS, LLCInventors: Pengdi HAN, Jian TIAN
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Publication number: 20150071029Abstract: The present invention generally relates to high frequency piezoelectric crystal composites, devices, and method for manufacturing the same. In adaptive embodiments an improved imaging device, particularly a medical imaging device or a distance imaging device, for high frequency (>20 MHz) applications involving an imaging transducer assembly is coupled to a signal imagery processor. Additionally, the proposed invention presents a system for photolithography based micro-machined piezoelectric crystal composites and their uses resulting in improved performance parameters.Type: ApplicationFiled: September 6, 2013Publication date: March 12, 2015Inventors: Pengdi Han, Jian Tian, Kevin Meneou, Brandon Stone
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Publication number: 20150043111Abstract: The invention relates to a control unit for a motor vehicle. Said control unit comprises a voltage converter which has an inlet for a direct voltage network. Said voltage converter is designed to generate a direct voltage smaller than an input voltage on the inlet for the direct voltage network and the direct voltage is emitted on the outlet side. According to the invention, the voltage converter comprises an inverter and a transformer which is connected to said inverter. Said voltage converter also comprises an inlet for a discharge signal and is designed to discharge by means of the inverter an intermediate circuit capacitor which is connected to the inlet of the direct voltage network in accordance with the discharge signal, and to reduce a working frequency of the inverter, in particular, compared to the frequency with no discharge signal.Type: ApplicationFiled: September 26, 2012Publication date: February 12, 2015Inventors: Stefan Koch, Jian Tian, Ralf-Peter Bergmann, Stephan Mueller
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Publication number: 20140369079Abstract: The invention relates to a voltage converter (1) for a motor vehicle. Said voltage converter (1) comprises a transformer (10) and a power output stage (7). The power output stage (7) comprises at least two semiconductor switches (20, 22, 24, 26) that are connected to the transformer (10), in particular to a primary winding (12) of said transformer (10). The voltage converter (1) has a driver stage (31) which is connected, on the output side, to a control connection of the semiconductor switch (20, 22, 24, 26) and which is designed to actuate said semiconductor switch (20, 22, 24, 26) using a control signal (93, 94), for the purpose of generating an alternating voltage. According to the invention, the driver stage (31) is connected, on the input side, to a pulse signal generator (35) and an input capacitor (60, 62).Type: ApplicationFiled: November 29, 2012Publication date: December 18, 2014Inventors: Stefan Koch, Jian Tian, Ralf-Peter Bergmann
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Publication number: 20140328086Abstract: The invention relates to an activation apparatus (20) for a galvanically decoupled direct voltage converter having a synchronous rectifier, comprising a signal generating device (22), which is designed to generate control signals (22c, 22d) for switch devices of the synchronous rectifier and a reference current signal (22b), a first comparator device (23), which is coupled to the signal generating device (22), and which is designed to detect the secondary-side output current (Jo) of the synchronous rectifier, compare it to the reference current signal (22b) and generate a current control signal in dependence on the comparison, and a pulse width modulation device (25), which is coupled to the signal generating device (22) and the first comparator device (23) and which is designed to generate pulse width modulated activation signals (25a) for the switch devices of the synchronous rectifier on the basis of the control signals (22c, 22d) and the current control signal, wherein the signal generating device (22) isType: ApplicationFiled: August 2, 2012Publication date: November 6, 2014Applicant: ROBERT BOSCH GMBHInventors: Eric Hueckel, Stefan Koch, Florian Lieblang, Stephan Binhack, Tobias Pristl, Michael Zeller, Stephan Mueller, Jian Tian, Ralf Bochat, Ralf-Peter Bergmann
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Publication number: 20140225191Abstract: A transistor advantageously embodied in a laterally diffused metal oxide semiconductor device having a gate located over a channel region recessed into a semiconductor substrate and a method of forming the same. In one embodiment, the laterally diffused metal oxide semiconductor device includes a source/drain having a lightly doped region located adjacent the channel region and a heavily doped region located adjacent the lightly doped region. The laterally diffused metal oxide semiconductor device further includes an oppositely doped well located under and within the channel region, and a doped region, located between the heavily doped region and the oppositely doped well, having a doping concentration profile less than a doping concentration profile of the heavily doped region.Type: ApplicationFiled: April 15, 2014Publication date: August 14, 2014Applicant: Enpirion, Inc.Inventors: Ashraf W. Lotfi, Jian Tian
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Patent number: 8728238Abstract: This invention includes a system and a method for growing crystals including a batch auto-feeding mechanism. The proposed system and method provide a minimization of compositional segregation effect during crystal growth by controlling growth rate involving a high-temperature flow control system operable in an open and a closed loop crystal growth process. The ability to control the growth rate without corresponding loss of volatilize-able elements enables significantly improvement in compositional homogeneity and a consequent increase in crystal yield. This growth system and method can be operated in production scale, simultaneously for a plurality of growth crucibles to further the reduction of manufacturing costs, particularly for the crystal materials of binary or ternary systems with volatile components, such as Lead (Pb) and Indium (In).Type: GrantFiled: August 1, 2013Date of Patent: May 20, 2014Assignee: H.C. Materials CorporationInventors: Pengdi Han, Jian Tian
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Publication number: 20140126247Abstract: The invention relates to a DC-DC voltage converter (1), having a transformer (2) having a primary winding (2a) and a secondary winding (2b, 2c) having a centre tap, an output inductor (3), which is connected to the centre tap and to a first output connection (9a), a synchronous rectifier circuit (4) having two synchronous rectifier switches (14a, 14b), each of which is connected to the terminal taps of the secondary winding (2b, 2c), and which are designed to produce a rectified output voltage on a second output connection (9b), and a snubber circuit (5) that is switched by means of the synchronous rectifier circuit (4).Type: ApplicationFiled: April 3, 2012Publication date: May 8, 2014Applicant: ROBERT BOSCH GMBHInventors: Stefan Koch, Jian Tian