Patents by Inventor Richard Mu
Richard Mu 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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Publication number: 20240067046Abstract: An electric vehicle comprises: a battery system split into first and second sectors substantially equal to each other; a first bidirectional DC/DC converter, the first bidirectional DC/DC converter being galvanically isolated and coupled to the first sector; and a second bidirectional DC/DC converter, the second bidirectional DC/DC converter being galvanically isolated and coupled to the second sector; wherein the first and second bidirectional DC/DC converters balance respective states of charge of the first and second sectors before the first and second sectors are connected in parallel.Type: ApplicationFiled: June 29, 2023Publication date: February 29, 2024Inventors: Mingkai Mu, Harrison Senor, Richard J. Biskup, Gregory Tzermias
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Patent number: 11565518Abstract: A drop ejector array device includes a first plurality and a second plurality of drop ejectors that are alternatingly disposed along an array direction on the substrate surface. A voltage input terminal and a current return terminal are disposed on the substrate surface. A first power bus line connects the first plurality to the voltage input terminal. A second power bus line connects the second plurality to the voltage input terminal. The second power bus line is electrically connected to the first power bus line by a primary power bus connector line. A first current return bus line connects the first plurality to the current return terminal. A second current return bus line connects the second plurality to the current return terminal. The second current return bus line is electrically connected to the first current return bus line by a primary current return bus connector line.Type: GrantFiled: December 22, 2021Date of Patent: January 31, 2023Assignee: SHANGHAI REALFAST DIGITAL TECHNOLOGY, LTD.Inventors: Richard Mu, Yonglin Xie
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Publication number: 20220111640Abstract: A drop ejector array device includes a first plurality and a second plurality of drop ejectors that are alternatingly disposed along an array direction on the substrate surface. A voltage input terminal and a current return terminal are disposed on the substrate surface. A first power bus line connects the first plurality to the voltage input terminal. A second power bus line connects the second plurality to the voltage input terminal. The second power bus line is electrically connected to the first power bus line by a primary power bus connector line. A first current return bus line connects the first plurality to the current return terminal. A second current return bus line connects the second plurality to the current return terminal. The second current return bus line is electrically connected to the first current return bus line by a primary current return bus connector line.Type: ApplicationFiled: December 22, 2021Publication date: April 14, 2022Inventors: Richard Mu, Yonglin Xie
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Patent number: 11247455Abstract: A drop ejector array device includes a first plurality and a second plurality of drop ejectors that are alternatingly disposed along an array direction on the substrate surface. A voltage input terminal and a current return terminal are disposed on the substrate surface. A first power bus line connects the first plurality to the voltage input terminal. A second power bus line connects the second plurality to the voltage input terminal. The second power bus line is electrically connected to the first power bus line by a primary power bus connector line. A first current return bus line connects the first plurality to the current return terminal. A second current return bus line connects the second plurality to the current return terminal. The second current return bus line is electrically connected to the first current return bus line by a primary current return bus connector line.Type: GrantFiled: April 21, 2020Date of Patent: February 15, 2022Assignee: SHANGHAI REALFAST DIGITAL TECHNOLOGY CO., LTDInventors: Richard Mu, Yonglin Xie
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Patent number: 10899125Abstract: A first swath of first dots is printed, such that each column of first dots is disposed along a first direction and is spaced apart from other columns of first dots along a scan direction. Allowable locations of first dots have an irregular extent along at least a first stitch boundary of the first swath. A second swath of second dots is printed similarly. A first stitch boundary of the second swath is proximate to the first stitch boundary of the first swath to form a first stitched region. Allowable locations of second dots have an irregular extent along at least the first stitch boundary of the second swath that is complementary to the irregular extent along the first stitch boundary of the first swath, where the allowable locations of first dots and the second dots in the first stitched region are substantially not interspersed along the first direction.Type: GrantFiled: December 11, 2019Date of Patent: January 26, 2021Assignee: SHANGHAI REALFAST DIGITAL TECHNOLOGY CO., LTDInventors: Richard Mu, Yonglin Xie
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Publication number: 20200247117Abstract: A drop ejector array device includes a first plurality and a second plurality of drop ejectors that are alternatingly disposed along an array direction on the substrate surface. A voltage input terminal and a current return terminal are disposed on the substrate surface. A first power bus line connects the first plurality to the voltage input terminal. A second power bus line connects the second plurality to the voltage input terminal. The second power bus line is electrically connected to the first power bus line by a primary power bus connector line. A first current return bus line connects the first plurality to the current return terminal. A second current return bus line connects the second plurality to the current return terminal. The second current return bus line is electrically connected to the first current return bus line by a primary current return bus connector line.Type: ApplicationFiled: April 21, 2020Publication date: August 6, 2020Inventors: Richard Mu, Yonglin Xie
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Patent number: 10730305Abstract: An inkjet printing system includes an printhead with a nozzle face having nozzles arranged along an array direction. A pressure source is configured to provide a positive or negative pressure to an ink source. A valve is fluidically connected between the ink source and the inkjet printhead. A cleaning station is configured to confront the nozzle face across a gap. The cleaning station includes a cleaning fluid dispenser for dispensing cleaning fluid onto the nozzle face. The cleaning station includes a waste fluid collector having a vacuum inlet that is displaced from the cleaning fluid dispenser in a first direction for collecting dispensed cleaning fluid. The cleaning station includes a blower that is displaced from the cleaning fluid dispenser in a second direction opposite to the first direction. The blower is configured to direct a gas stream along the nozzle face to move dispensed cleaning fluid toward the vacuum inlet.Type: GrantFiled: December 10, 2018Date of Patent: August 4, 2020Assignee: SHANGHAI REALFAST DIGITAL TECHNOLOGY CO., LTDInventors: Richard Mu, Yonglin Xie
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Patent number: 10668721Abstract: A drop ejector array device includes a first plurality and a second plurality of drop ejectors that are alternatingly disposed along an array direction on the substrate surface. A voltage input terminal and a current return terminal are disposed on the substrate surface. A first power bus line connects the first plurality to the voltage input terminal. A second power bus line connects the second plurality to the voltage input terminal. The second power bus line is electrically connected to the first power bus line by a primary power bus connector line. A first current return bus line connects the first plurality to the current return terminal. A second current return bus line connects the second plurality to the current return terminal. The second current return bus line is electrically connected to the first current return bus line by a primary current return bus connector line.Type: GrantFiled: September 19, 2018Date of Patent: June 2, 2020Assignee: RF PRINTING TECHNOLOGIESInventors: Richard Mu, Yonglin Xie
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Publication number: 20200086629Abstract: A drop ejector array device includes a first plurality and a second plurality of drop ejectors that are alternatingly disposed along an array direction on the substrate surface. A voltage input terminal and a current return terminal are disposed on the substrate surface. A first power bus line connects the first plurality to the voltage input terminal. A second power bus line connects the second plurality to the voltage input terminal. The second power bus line is electrically connected to the first power bus line by a primary power bus connector line. A first current return bus line connects the first plurality to the current return terminal. A second current return bus line connects the second plurality to the current return terminal. The second current return bus line is electrically connected to the first current return bus line by a primary current return bus connector line.Type: ApplicationFiled: September 19, 2018Publication date: March 19, 2020Inventors: Richard Mu, Yonglin Xie
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Patent number: 10525721Abstract: A drop ejection system includes a working fluid source containing a working fluid, an ink source containing an ink that is immiscible with the working fluid, and at least one drop ejector array module. Each drop ejector array module includes a substrate and an array of drop ejectors disposed on the substrate. Each drop ejector includes a nozzle; an ink inlet connected to the ink source; a working fluid inlet connected to the working fluid source; a pressure chamber in fluidic communication with the nozzle, the ink inlet, and the working fluid inlet; and a heating element configured to selectively vaporize a portion of the working fluid to pressurize the pressure chamber for ejecting ink drops through the nozzle.Type: GrantFiled: November 5, 2018Date of Patent: January 7, 2020Assignee: RF PRINTING TECHNOLOGIESInventors: Richard Mu, Yonglin Xie
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Publication number: 20190217616Abstract: A hierarchically aligned inkjet printhead includes a plurality of printhead units and a base holding the printhead units. Each printhead unit includes a plurality of drop ejector array devices, each of which includes at least one drop ejector array; a first butting edge having a first mechanical alignment feature; and a second butting edge having a second mechanical alignment feature. Each printhead unit includes an ink manifold that is fluidically connected to each of the plurality of drop ejector array devices in the printhead unit; and a mounting member to which the drop ejector array devices are affixed. A pair of opposing alignment edges of each printhead unit are substantially parallel to the butting edges of the drop ejector array devices. A first of the opposing alignment edges includes an outwardly-extending projection, and a second of the opposing alignment edges includes a niche that is substantially complementary to the projection.Type: ApplicationFiled: January 18, 2018Publication date: July 18, 2019Inventors: Richard Mu, Yonglin Xie
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Patent number: 10336074Abstract: A hierarchically aligned inkjet printhead includes a plurality of printhead units and a base holding the printhead units. Each printhead unit includes a plurality of drop ejector array devices, each of which includes at least one drop ejector array; a first butting edge having a first mechanical alignment feature; and a second butting edge having a second mechanical alignment feature. Each printhead unit includes an ink manifold that is fluidically connected to each of the plurality of drop ejector array devices in the printhead unit; and a mounting member to which the drop ejector array devices are affixed. A pair of opposing alignment edges of each printhead unit are substantially parallel to the butting edges of the drop ejector array devices. A first of the opposing alignment edges includes an outwardly-extending projection, and a second of the opposing alignment edges includes a niche that is substantially complementary to the projection.Type: GrantFiled: January 18, 2018Date of Patent: July 2, 2019Assignee: RF PRINTING TECHNOLOGIESInventors: Richard Mu, Yonglin Xie
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Publication number: 20190105907Abstract: An inkjet printing system includes an printhead with a nozzle face having nozzles arranged along an array direction. A pressure source is configured to provide a positive or negative pressure to an ink source. A valve is fluidically connected between the ink source and the inkjet printhead. A cleaning station is configured to confront the nozzle face across a gap. The cleaning station includes a cleaning fluid dispenser for dispensing cleaning fluid onto the nozzle face. The cleaning station includes a waste fluid collector having a vacuum inlet that is displaced from the cleaning fluid dispenser in a first direction for collecting dispensed cleaning fluid. The cleaning station includes a blower that is displaced from the cleaning fluid dispenser in a second direction opposite to the first direction. The blower is configured to direct a gas stream along the nozzle face to move dispensed cleaning fluid toward the vacuum inlet.Type: ApplicationFiled: December 10, 2018Publication date: April 11, 2019Inventors: Richard Mu, Yonglin Xie
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Publication number: 20190100023Abstract: A drop ejection system includes a working fluid source containing a working fluid, an ink source containing an ink that is immiscible with the working fluid, and at least one drop ejector array module. Each drop ejector array module includes a substrate and an array of drop ejectors disposed on the substrate. Each drop ejector includes a nozzle; an ink inlet connected to the ink source; a working fluid inlet connected to the working fluid source; a pressure chamber in fluidic communication with the nozzle, the ink inlet, and the working fluid inlet; and a heating element configured to selectively vaporize a portion of the working fluid to pressurize the pressure chamber for ejecting ink drops through the nozzle.Type: ApplicationFiled: November 5, 2018Publication date: April 4, 2019Inventors: Richard Mu, Yonglin Xie
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Patent number: 10179454Abstract: An inkjet printing system includes an printhead with a nozzle face having nozzles arranged along an array direction. A pressure source is configured to provide a positive or negative pressure to an ink source. A valve is fluidically connected between the ink source and the inkjet printhead. A cleaning station is configured to confront the nozzle face across a gap. The cleaning station includes a cleaning fluid dispenser for dispensing cleaning fluid onto the nozzle face. The cleaning station includes a waste fluid collector having a vacuum inlet that is displaced from the cleaning fluid dispenser in a first direction for collecting dispensed cleaning fluid. The cleaning station includes a blower that is displaced from the cleaning fluid dispenser in a second direction opposite to the first direction. The blower is configured to direct a gas stream along the nozzle face to move dispensed cleaning fluid toward the vacuum inlet.Type: GrantFiled: April 25, 2017Date of Patent: January 15, 2019Assignee: RF PRINTING TECHNOLOGIESInventors: Richard Mu, Yonglin Xie
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Patent number: 10166769Abstract: An inkjet printhead includes a two-dimensional array of drop ejectors arranged as a plurality of columns, each column including a plurality of banks, and each bank including a plurality of groups that each include a plurality of drop ejectors. The drop ejectors in each group are substantially aligned along a first direction. The groups in each bank are spaced from each other along the first direction and are offset from each other along a second direction. The banks in each column are spaced from each other along the first direction and are offset from each other along the second direction. The columns are offset from each other along the second direction. The two-dimensional array has a width W along the first direction and a length L greater than W along the second direction. Each drop ejector includes a nozzle, an ink inlet, a pressure chamber and an actuator.Type: GrantFiled: June 14, 2016Date of Patent: January 1, 2019Assignee: RF Printing Technologies LLCInventors: Richard Mu, Yonglin Xie
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Patent number: 10155384Abstract: A drop ejection system includes a working fluid source containing a working fluid, an ink source containing an ink that is immiscible with the working fluid, and at least one drop ejector array module. Each drop ejector array module includes a substrate and an array of drop ejectors disposed on the substrate. Each drop ejector includes a nozzle; an ink inlet connected to the ink source; a working fluid inlet connected to the working fluid source; a pressure chamber in fluidic communication with the nozzle, the ink inlet, and the working fluid inlet; and a heating element configured to selectively vaporize a portion of the working fluid to pressurize the pressure chamber for ejecting ink drops through the nozzle.Type: GrantFiled: February 20, 2017Date of Patent: December 18, 2018Assignee: RF Printing Technologies LLCInventors: Richard Mu, Yonglin Xie
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Publication number: 20180304635Abstract: An inkjet printing system includes an printhead with a nozzle face having nozzles arranged along an array direction. A pressure source is configured to provide a positive or negative pressure to an ink source. A valve is fluidically connected between the ink source and the inkjet printhead. A cleaning station is configured to confront the nozzle face across a gap. The cleaning station includes a cleaning fluid dispenser for dispensing cleaning fluid onto the nozzle face. The cleaning station includes a waste fluid collector having a vacuum inlet that is displaced from the cleaning fluid dispenser in a first direction for collecting dispensed cleaning fluid. The cleaning station includes a blower that is displaced from the cleaning fluid dispenser in a second direction opposite to the first direction. The blower is configured to direct a gas stream along the nozzle face to move dispensed cleaning fluid toward the vacuum inlet.Type: ApplicationFiled: April 25, 2017Publication date: October 25, 2018Inventors: Richard Mu, Yonglin Xie
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Publication number: 20180236764Abstract: A drop ejection system includes a working fluid source containing a working fluid, an ink source containing an ink that is immiscible with the working fluid, and at least one drop ejector array module. Each drop ejector array module includes a substrate and an array of drop ejectors disposed on the substrate. Each drop ejector includes a nozzle; an ink inlet connected to the ink source; a working fluid inlet connected to the working fluid source; a pressure chamber in fluidic communication with the nozzle, the ink inlet, and the working fluid inlet; and a heating element configured to selectively vaporize a portion of the working fluid to pressurize the pressure chamber for ejecting ink drops through the nozzle.Type: ApplicationFiled: February 20, 2017Publication date: August 23, 2018Inventors: Richard Mu, Yonglin Xie
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Patent number: D989513Type: GrantFiled: August 27, 2021Date of Patent: June 20, 2023Inventor: Richard Mu