Patents by Inventor Pen Li
Pen Li 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: 11699989Abstract: A piezoelectric structure is disclosed which includes a single crystal having piezoelectric coefficients d31 and d32 of opposite magnitude, such that when an alternating electric field is applied in the Z direction, the piezoelectric structure expands in one of the X and Y directions and contracts in the other of the X and Y direction, a first electrode coupled to the single crystal, and a second electrode coupled to the single crystal, wherein the alternating electric field is input to the single crystal through the first and second electrodes.Type: GrantFiled: November 3, 2022Date of Patent: July 11, 2023Assignee: Purdue Research FoundationInventors: Sunil A Bhave, Pen-Li Yu
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Publication number: 20230054876Abstract: A piezoelectric structure is disclosed which includes a single crystal having piezoelectric coefficients d31 and d32 of opposite magnitude, such that when an alternating electric field is applied in the Z direction, the piezoelectric structure expands in one of the X and Y directions and contracts in the other of the X and Y direction, a first electrode coupled to the single crystal, and a second electrode coupled to the single crystal, wherein the alternating electric field is input to the single crystal through the first and second electrodes.Type: ApplicationFiled: November 3, 2022Publication date: February 23, 2023Applicant: Purdue Research FoundationInventors: Sunil A. Bhave, Pen-Li Yu
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Patent number: 11528788Abstract: An LED lighting device includes a luminescent device driven by a rectified AC voltage, a current detecting circuit, a current regulating circuit, and a duty cycle detecting circuit. The current regulating circuit is configured to provide a regulating current so that the current flowing through the luminescent device does not exceed the regulating current. The current detecting circuit is configured to monitor the value of the regulating current, and the duty cycle detecting circuit is configured to monitor the duty cycle of the regulating current. The present invention can improve the overall line regulation of the LED lighting device when the rectified AC voltage somehow fluctuates between its upper bound and lower bound.Type: GrantFiled: July 20, 2021Date of Patent: December 13, 2022Assignee: Chiplight Technology (Shenzhen) Co., Ltd.Inventors: Horng-Bin Hsu, Yi-Mei Li, Pen-Li Chou
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Publication number: 20220377859Abstract: An LED lighting device includes a luminescent device driven by a rectified AC voltage, a current detecting circuit, a current regulating circuit, and a duty cycle detecting circuit. The current regulating circuit is configured to provide a regulating current so that the current flowing through the luminescent device does not exceed the regulating current. The current detecting circuit is configured to monitor the value of the regulating current, and the duty cycle detecting circuit is configured to monitor the duty cycle of the regulating current. The present invention can improve the overall line regulation of the LED lighting device when the rectified AC voltage somehow fluctuates between its upper bound and lower bound.Type: ApplicationFiled: July 20, 2021Publication date: November 24, 2022Applicant: Chiplight Technology (Shenzhen) Co., Ltd.Inventors: Horng-Bin Hsu, Yi-Mei Li, Pen-Li Chou
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Patent number: 11496115Abstract: A piezoelectric structure is disclosed which includes a single crystal having piezoelectric coefficients d31 and d32 of opposite magnitude, such that when an alternating electric field is applied in the Z direction, the piezoelectric structure expands in one of the X and Y directions and contracts in the other of the X and Y direction, a first electrode coupled to the single crystal, and a second electrode coupled to the single crystal, wherein the alternating electric field is input to the single crystal through the first and second electrodes.Type: GrantFiled: August 20, 2019Date of Patent: November 8, 2022Assignee: Purdue Research FoundationInventors: Sunil A Bhave, Pen-Li Yu
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Publication number: 20210058061Abstract: A piezoelectric structure is disclosed which includes a single crystal having piezoelectric coefficients d31 and d32 of opposite magnitude, such that when an alternating electric field is applied in the Z direction, the piezoelectric structure expands in one of the X and Y directions and contracts in the other of the X and Y direction, a first electrode coupled to the single crystal, and a second electrode coupled to the single crystal, wherein the alternating electric field is input to the single crystal through the first and second electrodes.Type: ApplicationFiled: August 20, 2019Publication date: February 25, 2021Applicant: Purdue Research FoundationInventors: Sunil A. Bhave, Pen-Li Yu
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Patent number: 10886888Abstract: A bulk acoustic wave (BAW) resonator is disclosed. The BAW resonator includes: a lower electrode; a piezoelectric layer disposed over the lower electrode; and an upper electrode over the piezoelectric layer. An opening having a first area exists in and extends completely through the upper electrode. The BAW resonator also includes a substrate disposed below the lower electrode; a cavity; and a pillar disposed in the cavity and extending to contact a portion of the lower electrode disposed beneath the opening. The pillar has a second area that is less than the first area. There are no electrical connections that extend across the opening from one side to another.Type: GrantFiled: July 25, 2019Date of Patent: January 5, 2021Assignee: Avago Technologies International Sales Pte. LimitedInventors: Brice Ivira, Chris Kirkendall, Pen Li Yu, Sormeh Setoodeh, David Albert Feld
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Patent number: 10879049Abstract: A chemical vapor deposition (CVD) tool includes a processing chamber, a remote plasma system, a first gas source, a second gas source, a first gas passage and a second gas passage. The remote plasma system is connected to the processing chamber. The first gas passage connects the first gas source, the remote plasma system and the processing chamber. The second gas passage connects the second gas source and the processing chamber, and bypasses the remote plasma system.Type: GrantFiled: July 30, 2015Date of Patent: December 29, 2020Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.Inventors: Chien-Ta Lee, Pen-Li Hung, Yu-Shan Shih
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Publication number: 20200121508Abstract: A fillable soft medium ear protector, which is used to place inside human ear canal, including a guide portion, a first fill portion disposed adjacent to the guide portion and provided with a first holding chamber, a second fill portion disposed adjacent to the first fill portion relative to the guide portion and provided with a second holding chamber, and a hollow passageway that extends between the first and the second fill portions. The hollow passageway passes through two connecting passages that respectively connect with a first and a second holding chambers. In addition, valve bodies are respectively provided between the first and the second holding chambers and the two connecting passages, thereby preventing a soft medium from leaking from the respective holding chambers. The two connecting passages enable a soft medium to respectively enter the first and the second holding chambers to form filled states therein.Type: ApplicationFiled: November 30, 2018Publication date: April 23, 2020Inventor: Pen-Li CHEN
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Patent number: 10568173Abstract: A dimmer circuit is used in an LED lighting system which includes a power supply circuit and a lamp. The power supply circuit is configured to provide an AC voltage. The lamp is coupled to the power supply. The dimmer circuit is configured to adjust the brightness of the lamp according to a dimming signal without the lamp conducting a bleeder current during each cycle of the AC voltage.Type: GrantFiled: December 21, 2018Date of Patent: February 18, 2020Assignee: Chiplight Technology (Shenzhen) Co., Ltd.Inventors: Horng-Bin Hsu, Pen-Li Chou
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Publication number: 20190348963Abstract: A bulk acoustic wave (BAW) resonator is disclosed. The BAW resonator includes: a lower electrode; a piezoelectric layer disposed over the lower electrode; and an upper electrode over the piezoelectric layer. An opening having a first area exists in and extends completely through the upper electrode. The BAW resonator also includes a substrate disposed below the lower electrode; a cavity; and a pillar disposed in the cavity and extending to contact a portion of the lower electrode disposed beneath the opening. The pillar has a second area that is less than the first area. There are no electrical connections that extend across the opening from one side to another.Type: ApplicationFiled: July 25, 2019Publication date: November 14, 2019Inventors: Brice Ivira, Chris Kirkendall, Pen Li Yu, Sormeh Setoodeh, David Albert Feld
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Patent number: 10444431Abstract: A reticulated resonator includes: a reticulated substrate that includes: a substrate frame; and a phononic structure in mechanical communication with the substrate frame and including a plurality of unit members arranged in a two-dimensional array; and a membrane disposed on the reticulated substrate.Type: GrantFiled: January 14, 2016Date of Patent: October 15, 2019Assignee: NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGYInventors: Raymond W. Simmonds, Katarina Cicak, Cindy A. Regal, Pen-Li Yu, Yeghishe Tsaturyan, Thomas P. Purdy, Nir S. Kampel
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Publication number: 20170032940Abstract: A chemical vapor deposition (CVD) tool includes a processing chamber, a remote plasma system, a first gas source, a second gas source, a first gas passage and a second gas passage. The remote plasma system is connected to the processing chamber. The first gas passage connects the first gas source, the remote plasma system and the processing chamber. The second gas passage connects the second gas source and the processing chamber, and bypasses the remote plasma system.Type: ApplicationFiled: July 30, 2015Publication date: February 2, 2017Inventors: Chien-Ta LEE, Pen-Li HUNG, Yu-Shan SHIH
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Patent number: 9525452Abstract: A circuit of a wireless transceiver chip is disclosed. In the circuit of the wireless transceiver chip of the present invention, a capacitor is connected between the secondary conductor of the transformer in the transmitter circuit and the ground pad to form a notch filter for filtering the image signal. An ESD protection circuit is connected with the capacitor in parallel. Since the ESD protection circuit is not connected to the signal receiving path, the performance of the chip would not be degraded.Type: GrantFiled: November 18, 2015Date of Patent: December 20, 2016Assignee: Airoha Technology Corp.Inventor: Pen-Li You
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Publication number: 20160218768Abstract: A circuit of a wireless transceiver chip is disclosed. In the circuit of the wireless transceiver chip of the present invention, a capacitor is connected between the secondary conductor of the transformer in the transmitter circuit and the ground pad to form a notch filter for filtering the image signal. An ESD protection circuit is connected with the capacitor in parallel. Since the ESD protection circuit is not connected to the signal receiving path, the performance of the chip would not be degraded.Type: ApplicationFiled: November 18, 2015Publication date: July 28, 2016Inventor: PEN-LI YOU
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Publication number: 20160211828Abstract: A reticulated resonator includes: a reticulated substrate that includes: a substrate frame; and a phononic structure in mechanical communication with the substrate frame and including a plurality of unit members arranged in a two-dimensional array; and a membrane disposed on the reticulated substrate.Type: ApplicationFiled: January 14, 2016Publication date: July 21, 2016Inventors: Raymond W. Simmonds, Katarina Cicak, Cindy A. Regal, Pen-Li Yu, Yeghishe Tsaturyan, Thomas P. Purdy, Nir S. Kampel
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Patent number: 8664870Abstract: A cascoded current regulator, including: a first load circuit, having a first load and a current source unit; and a second load circuit, being cascaded with the first load circuit and having a second load and a current mirror unit, wherein a first current flowing through the first load and a second current flowing through the current source unit are controlled by a control voltage, and a third current flowing through the second load and a fourth current flowing through the current mirror unit are generated according to the second current.Type: GrantFiled: March 23, 2012Date of Patent: March 4, 2014Assignee: Immense Advance Technology, CorporationInventors: Wei-Chuan Su, Pen-Li Chou, Yen-Hui Wang
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Publication number: 20130274665Abstract: A drug-delivery chip and a method of fabricating the same are provided. The drug-delivery chip has a main body having at least one drug receiving space individually formed with an opening for storing drugs therein; a thin film for sealing up the at least one drug receiving space; a first conductive wire connecting to one end of the thin film; a second conductive wire connecting to another end of the thin film; a signal-receiving module for receiving actuated signals; and a control module for applying voltages to first and second wire conductive s according to the actuated signal, thereby generating heat to break off the thin film for the release of a drug or drugs received in the at least one drug receiving space.Type: ApplicationFiled: June 10, 2013Publication date: October 17, 2013Inventors: Shey-Shi Lu, Yao-Joe Yang, Yu-Jie Huang, Chii-Wann Lin, Hsin-Hung Liao, Tao Wang, Pen-Li Huang, Yao-Hong Wang
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Publication number: 20130249423Abstract: A cascoded current regulator, including: a first load circuit, having a first load and a current source unit; and a second load circuit, being cascaded with the first load circuit and having a second load and a current mirror unit, wherein a first current flowing through the first load and a second current flowing through the current source unit are controlled by a control voltage, and a third current flowing through the second load and a fourth current flowing through the current mirror unit are generated according to the second current.Type: ApplicationFiled: March 23, 2012Publication date: September 26, 2013Inventors: Wei-Chuan SU, Pen-Li CHOU, Yen-Hui WANG
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Patent number: 8460564Abstract: A drug-delivery chip and a method of fabricating the same are provided. The drug-delivery chip has a main body having at least one drug receiving space individually formed with an opening for storing drugs therein; a thin film for sealing up the at least one drug receiving space; a first conductive wire connecting to one end of the thin film; a second conductive wire connecting to another end of the thin film; a signal-receiving module for receiving actuated signals; and a control module for applying voltages to first and second wire conductive s according to the actuated signal, thereby generating heat to break off the thin film for the release of a drug or drugs received in the at least one drug receiving space.Type: GrantFiled: January 28, 2010Date of Patent: June 11, 2013Assignee: National Taiwan UniversityInventors: Shey-Shi Lu, Yao-Joe Yang, Yu-Jie Huang, Chii-Wann Lin, Hsin-Hung Liao, Tao Wang, Pen-Li Huang, Yao-Hong Wang