Patents by Inventor Yuzhou Liu
Yuzhou Liu 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: 11982737Abstract: Techniques for presence-detection devices to vary presence-detection sensitivity to detect different types of movements by objects, such as major movements and minor movements, using ultrasonic signals. The devices detect movement of a person in an environment by emitting ultrasonic signals into the environment, and characterizing the change in the frequency, or the Doppler shift, of the reflections of the ultrasonic signals off the person caused by the movement of the person relative to the presence-detection devices. The presence-detection devices may control the presence-detection sensitivity in order to detect major movements, such as a user walking in a room, as well as objects minor movements, such as a user typing at a computer. By adjusting the presence-detection sensitivity, the devices are able to improve the overall accuracy of detecting the presence of users in an environment.Type: GrantFiled: June 30, 2021Date of Patent: May 14, 2024Assignee: AMAZON TECHNOLOGIES, INC.Inventors: Yuzhou Liu, Krishna Kamath Koteshwara, Rui Wang, Harsha Inna Kedage Rao, Tarun Pruthi, Trausti Thor Kristjansson
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Patent number: 11727926Abstract: A computing device may receive audio data from a microphone representing audio in an environment of the device, which may correspond to an utterance and noise. A model may be trained to process the audio data to reduce noise from the audio data. The model may include an encoder that includes one or more dense layers, one or more recurrent layers, and a decoder that includes one or more dense layers.Type: GrantFiled: September 18, 2020Date of Patent: August 15, 2023Assignee: Amazon Technologies, Inc.Inventors: Yuzhou Liu, Savaskan Bulek, Ali Abdollahzadeh Milani, Tarun Pruthi, Trausti Thor Kristjansson
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Patent number: 11564036Abstract: Techniques for presence-detection devices to detect movement of a person in an environment by emitting ultrasonic signals using a loudspeaker that is concurrently outputting audible sound. To detect movement by the person, the devices characterize the change in the frequency, or the Doppler shift, of the reflections of the ultrasonic signals off the person caused by the movement of the person. However, when a loudspeaker plays audible sound while emitting the ultrasonic signal, audio signals generated by microphones of the devices include distortions caused by the loudspeaker. These distortions can be interpreted by the presence-detection devices as indicating movement of a person when there is no movement, or as indicating lack of movement when a user is moving. The techniques include processing audio signals to remove distortions to more accurately identify changes in the frequency of the reflections of the ultrasonic signals caused by the movement of the person.Type: GrantFiled: October 21, 2020Date of Patent: January 24, 2023Assignee: Amazon Technologies, Inc.Inventors: Krishna Kamath Koteshwara, Zhen Sun, Spencer Russell, Tarun Pruthi, Yuzhou Liu, Wan-Chieh Pai
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Patent number: 9718927Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: GrantFiled: June 13, 2016Date of Patent: August 1, 2017Assignee: Milliken & CompanyInventors: Yuzhou Liu, Yunzhang Wang, Russell A. Stapleton
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Patent number: 9695316Abstract: A siloxane compound conforms to the structure of one of Formulae (I), (X), and (XX). A composition comprises (a) a first siloxane compound selected from the group consisting of compounds conforming to the structure of Formula (X) and compounds conforming to the structure of Formula (XX) and (b) a second siloxane compound, the second siloxane compound comprising a plurality of siloxane repeating units, including cyclotrisiloxane repeating units conforming to the structure of Formula (XL).Type: GrantFiled: May 6, 2016Date of Patent: July 4, 2017Assignee: Milliken & CompanyInventors: Michael E. Wilson, Yuzhou Liu, Sharon E. Koh-Fallet, Yunzhang Wang, Sudhanshu Srivastava
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Patent number: 9530946Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: GrantFiled: April 3, 2014Date of Patent: December 27, 2016Assignee: Milliken & CompanyInventors: Yuzhou Liu, Yunzhang Wang, Russell A. Stapleton
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Patent number: 9518073Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: GrantFiled: April 3, 2014Date of Patent: December 13, 2016Assignee: Milliken & CompanyInventors: Yuzhou Liu, Keith A. Keller, Michael E. Wilson
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Publication number: 20160340511Abstract: A siloxane compound conforms to the structure of one of Formulae (I), (X), and (XX). A composition comprises (a) a first siloxane compound selected from the group consisting of compounds conforming to the structure of Formula (X) and compounds conforming to the structure of Formula (XX) and (b) a second siloxane compound, the second siloxane compound comprising a plurality of siloxane repeating units, including cyclotrisiloxane repeating units conforming to the structure of Formula (XL).Type: ApplicationFiled: May 6, 2016Publication date: November 24, 2016Inventors: Michael E. Wilson, Yuzhou Liu, Sharon E. Koh-Fallet, Yunzhang Wang, Sudhanshu Srivastava
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Publication number: 20160289390Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: ApplicationFiled: June 13, 2016Publication date: October 6, 2016Inventors: Yuzhou Liu, Yunzhang Wang, Russell A. Stapleton
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Patent number: 9422317Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: GrantFiled: April 3, 2014Date of Patent: August 23, 2016Assignee: Milliken & CompanyInventors: Yuzhou Liu, Keith A. Keller, Michael E. Wilson
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Patent number: 9388284Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: GrantFiled: April 3, 2014Date of Patent: July 12, 2016Assignee: Milliken & CompanyInventors: Yuzhou Liu, Yunzhang Wang, Russell A. Stapleton
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Patent number: 9334294Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: GrantFiled: April 3, 2014Date of Patent: May 10, 2016Assignee: Milliken & CompanyInventor: Yuzhou Liu
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Publication number: 20140309450Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: ApplicationFiled: April 3, 2014Publication date: October 16, 2014Applicant: MILLIKEN & COMPANYInventor: Yuzhou Liu
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Publication number: 20140309449Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: ApplicationFiled: April 3, 2014Publication date: October 16, 2014Applicant: MILLIKEN & COMPANYInventors: Yuzhou Liu, Keith A. Keller, Michael E. Wilson
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Publication number: 20140309448Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: ApplicationFiled: April 3, 2014Publication date: October 16, 2014Applicant: MILLIKEN & COMPANYInventors: Yuzhou Liu, Keith A. Keller, Michael E. Wilson
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Publication number: 20140309380Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: ApplicationFiled: April 3, 2014Publication date: October 16, 2014Applicant: MILLIKEN & COMPANYInventors: Yuzhou Liu, Yunzhang Wang, Russell A. Stapleton
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Publication number: 20140306259Abstract: A siloxane compound comprises a plurality of siloxane repeating units and at least a portion of the siloxane repeating units are cyclosiloxane repeating units conforming to a specified structure. A process for producing such siloxane compounds is also provided. A process and kit for producing a cross-linked silicone polymer using the described siloxane compounds is also provided. A light emitting diode (LED) comprises an encapsulant, and the encapsulant comprises a cross-linked silicone polymer produced from the described siloxane compounds.Type: ApplicationFiled: April 3, 2014Publication date: October 16, 2014Applicant: MILLIKEN & COMPANYInventors: Yuzhou Liu, Yunzhang Wang, Russell A. Stapleton