Patents by Inventor Zhe GAO
Zhe GAO 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: 20220078360Abstract: A switch driver circuit includes a plurality of pullup transistors. The plurality of pullup transistors includes a first pullup transistor coupled between a voltage supply and a first output node. A plurality of pulldown transistors includes a first pulldown transistor coupled between the first output node and a ground node. A slope control circuit is coupled to the ground node. A plurality of global connection switches includes a first global connection switch coupled between the first output node and the slope control circuit.Type: ApplicationFiled: November 18, 2021Publication date: March 10, 2022Inventors: Zhe Gao, Ling Fu, Yu-Shen Yang, Tiejun Dai
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Patent number: 11252346Abstract: Switching techniques for fast voltage settling in image sensors are described. In one embodiment, a transfer gate (TX) driver circuit of an image sensor includes a TX driver configured to provide a TX driver voltage to a plurality of pixels of an image sensor. A power supply (NVDD) is operationally coupled to the TX driver. A first switch (SW1) operationally coupling an outside capacitance (Cext) and the TX driver. A second switch (SW2) operationally coupling the Cext and the NVDD. A third switch (SW3) operationally coupling the NVDD and the TX driver. A falling edge of the TX driver voltage is configured to control a start of data transfer from individual pixels of the plurality of pixels. The SW1 and the SW2 are configured in an open position before the falling edge of the TX driver voltage. The SW3 is configured in a closed position before the falling edge.Type: GrantFiled: September 29, 2020Date of Patent: February 15, 2022Assignee: OMNIVISION TECHNOLOGIES, INC.Inventors: Tiejun Dai, Zhe Gao, Ling Fu
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Patent number: 11240454Abstract: An image sensor includes a source follower coupled to a photodiode to generate an image signal responsive to photogenerated charge. The image signal is received by image readout circuitry through a row select transistor. A reset transistor resets the photogenerated charge. A first node of mode select circuit is coupled to the reset transistor, a second node is coupled to a pixel supply voltage, and a third node is coupled to an event driven circuit. The mode select circuit couples the first node to the second node during an imaging mode to supply the pixel supply voltage to the reset transistor. The mode select circuit is further configured to couple the first node to the third node during an event driven mode to couple a photocurrent of the photodiode to drive the event driven circuit through the reset transistor to detect changes in the photocurrent.Type: GrantFiled: April 29, 2020Date of Patent: February 1, 2022Assignee: OMNIVISION TECHNOLOGIES, INC.Inventors: Zhe Gao, Tiejun Dai
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Patent number: 11212457Abstract: A pixel cell includes a first subpixel and a plurality of second subpixels. Each subpixel includes a photodiode to photogenerate image charge in response to incident light. Image charge is transferred from the first subpixel to a floating diffusion through a first transfer transistor. Image charge is transferred from the plurality of second subpixels to the floating diffusion through a plurality of second transfer transistors. An attenuation layer is disposed over the first subpixel. The first subpixel receives the incident light through the attenuation layer. The plurality of second subpixels receive the incident light without passing through the attenuation layer. A dual floating diffusion (DFD) transistor is coupled to the floating diffusion. A capacitor is coupled to the DFD transistor.Type: GrantFiled: May 28, 2020Date of Patent: December 28, 2021Assignee: OMNIVISION TECHNOLOGIES, INC.Inventors: Tiejun Dai, Keiji Mabuchi, Zhe Gao
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Patent number: 11212467Abstract: A switch driver circuit includes a first transistor coupled between a voltage supply and a first output node. A second transistor is coupled between the first output node and a first discharge node. A first slope control circuit is coupled to the first discharge node to discharge the first discharge node at a first slope. A third transistor is coupled between the voltage supply and a second output node. A fourth transistor is coupled between the second output node and a second discharge node. A second slope control circuit coupled to the second discharge node to discharge the second discharge node at a second slope. The first and second slopes are mismatched.Type: GrantFiled: July 18, 2019Date of Patent: December 28, 2021Assignee: OMNIVISION TECHNOLOGIES, INC.Inventors: Zhe Gao, Ling Fu, Yu-Shen Yang, Tiejun Dai
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Patent number: 11206392Abstract: An image sensor includes a pixel array with active rows of pixel cells, a black level calibration row with black image data generation circuits coupled to generate black image data signals representative of an absence of the incident light, and a dummy row with black level clamping circuits coupled to receive a black sun reference voltage to clamp bitlines of the pixel array, and a black level calibration circuit coupled to receive the black sun reference voltage to generate a black sun calibration voltage. A black sun feedback circuit is coupled to generate the black sun reference voltage in response to the black sun calibration voltage and a black level sample reference, and a black level sampling circuit is coupled to the bitlines to sample the black image data signals to generate the black level sample reference received by the black sun feedback circuit.Type: GrantFiled: July 16, 2020Date of Patent: December 21, 2021Assignee: OMNIVISION TECHNOLOGIES, INC.Inventors: Liang Zuo, Min Qu, Xuelian Liu, Rui Wang, Zhe Gao, Zhiyong Zhan
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Publication number: 20210377435Abstract: A pixel cell includes a first subpixel and a plurality of second subpixels. Each subpixel includes a photodiode to photogenerate image charge in response to incident light. Image charge is transferred from the first subpixel to a floating diffusion through a first transfer transistor. Image charge is transferred from the plurality of second subpixels to the floating diffusion through a plurality of second transfer transistors. An attenuation layer is disposed over the first subpixel. The first subpixel receives the incident light through the attenuation layer. The plurality of second subpixels receive the incident light without passing through the attenuation layer. A dual floating diffusion (DFD) transistor is coupled to the floating diffusion. A capacitor is coupled to the DFD transistor.Type: ApplicationFiled: May 28, 2020Publication date: December 2, 2021Inventors: Tiejun Dai, Keiji Mabuchi, Zhe Gao
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Publication number: 20210344867Abstract: An image sensor includes a source follower coupled to a photodiode to generate an image signal responsive to photogenerated charge. The image signal is received by image readout circuitry through a row select transistor. A reset transistor resets the photogenerated charge. A first node of mode select circuit is coupled to the reset transistor, a second node is coupled to a pixel supply voltage, and a third node is coupled to an event driven circuit. The mode select circuit couples the first node to the second node during an imaging mode to supply the pixel supply voltage to the reset transistor. The mode select circuit is further configured to couple the first node to the third node during an event driven mode to couple a photocurrent of the photodiode to drive the event driven circuit through the reset transistor to detect changes in the photocurrent.Type: ApplicationFiled: April 29, 2020Publication date: November 4, 2021Inventors: Zhe Gao, Tiejun Dai
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Patent number: 11162198Abstract: The disclosure discloses a method of whole garment knitting in horizontal direction along the back center, and belongs to the technical field of knitted fabrics. The method can be used for directly knitting an integrally shaped left piece and right piece, wherein a sleeve, a front body, a back body, a front placket, a lapel and a lapel collar of the left piece or the right piece are all integrally shaped, and can be directly sewn at back center lines and collar center lines through a looper to form a fully-shaped upper garment including plackets and a collar portion. According to the solution, the knitting process is simple, manual or single yarn lifting sewing is not needed, and the garment knitting efficiency is improved.Type: GrantFiled: December 29, 2020Date of Patent: November 2, 2021Assignee: Jiangnan UniversityInventors: Honglian Cong, Gaoming Jiang, Zhijia Dong, Zhe Gao, Bo Liu
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Patent number: 11140352Abstract: A readout circuit for use in an image sensor includes a first sample and hold (SH) circuit coupled to a bitline that is coupled to a pixel array. A second SH circuit is coupled to the bitline. A bypass switch is coupled to the bitline, the first SH circuit, and the second SH circuit. An analog to digital converter (ADC) is coupled to the bypass switch. The bypass switch is configured to provide an image charge value from the pixel array to the ADC through the bitline, or through one of the first SH circuit or the second SH circuit in response to a switch select signal.Type: GrantFiled: December 14, 2020Date of Patent: October 5, 2021Assignee: OMNIVISION TECHNOLOGIES, INC.Inventors: Tiejun Dai, Zhe Gao, Ling Fu
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Publication number: 20210115602Abstract: The disclosure discloses a method of whole garment knitting in horizontal direction along the back center, and belongs to the technical field of knitted fabrics. The method can be used for directly knitting an integrally shaped left piece and right piece, wherein a sleeve, a front body, a back body, a front placket, a lapel and a lapel collar of the left piece or the right piece are all integrally shaped, and can be directly sewn at back center lines and collar center lines through a looper to form a fully-shaped upper garment including plackets and a collar portion. According to the solution, the knitting process is simple, manual or single yarn lifting sewing is not needed, and the garment knitting efficiency is improved.Type: ApplicationFiled: December 29, 2020Publication date: April 22, 2021Inventors: Honglian CONG, Gaoming JIANG, Zhijia DONG, Zhe GAO, Bo LIU
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Publication number: 20210021769Abstract: A switch driver circuit includes a first transistor coupled between a voltage supply and a first output node. A second transistor is coupled between the first output node and a first discharge node. A first slope control circuit is coupled to the first discharge node to discharge the first discharge node at a first slope. A third transistor is coupled between the voltage supply and a second output node. A fourth transistor is coupled between the second output node and a second discharge node. A second slope control circuit coupled to the second discharge node to discharge the second discharge node at a second slope. The first and second slopes are mismatched.Type: ApplicationFiled: July 18, 2019Publication date: January 21, 2021Inventors: Zhe Gao, Ling Fu, Yu-Shen Yang, Tiejun Dai
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Publication number: 20200337296Abstract: Cryoprotective compositions with magnetic nanowires and cryoprotective agents are used to cryopreserve biomaterials. The biomaterials in the cryoprotective composition are rapidly and uniformly heated during warming to minimize damage due to cracking and/or devitrification. The nanowires are CoFe nanowires. The nanowires may be aligned parallel to the alternating magnetic field to increase the specific absorption rate of the nanowires. The methods include warming the cryopreserved biomaterial in the cryopreserved composition at a rate higher than the critical warming rate using an alternating magnetic field.Type: ApplicationFiled: April 20, 2020Publication date: October 29, 2020Inventors: Daniel Eugene Shore, Zhe Gao, Ibro Tabakovic, John Bischof, Bethanie Joyce Hill Stadler
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Patent number: 10432879Abstract: A readout circuit includes a comparator coupled to receive a ramp signal an output of a dual conversion gain pixel. A single counter is coupled to the output of the comparator. The counter is coupled to write to only one of a first or a second memory circuits at a time. A first multiplexor is coupled to load either an initial value or an initial memory value from the first memory circuit into the counter. A second multiplexor is coupled to load either a low conversion gain memory value from the first memory circuit or a high conversion gain memory value from the second memory circuit into a single data transmitter, which is coupled to transmit the received memory value to a digital processor.Type: GrantFiled: January 16, 2018Date of Patent: October 1, 2019Assignee: OmniVision Technologies, Inc.Inventors: Chun-Hsiang Chang, Yingkan Lin, Jingwei Lai, Zhe Gao
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Publication number: 20190222780Abstract: A readout circuit includes a comparator coupled to receive a ramp signal an output of a dual conversion gain pixel. A single counter is coupled to the output of the comparator. The counter is coupled to write to only one of a first or a second memory circuits at a time. A first multiplexor is coupled to load either an initial value or an initial memory value from the first memory circuit into the counter. A second multiplexor is coupled to load either a low conversion gain memory value from the first memory circuit or a high conversion gain memory value from the second memory circuit into a single data transmitter, which is coupled to transmit the received memory value to a digital processor.Type: ApplicationFiled: January 16, 2018Publication date: July 18, 2019Inventors: Chun-Hsiang Chang, Yingkan Lin, Jingwei Lai, Zhe Gao
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Patent number: 10340076Abstract: An integrated copper bar for a secondary power circuit of a power electronic converter, including a transformer primary winding copper bar, a transformer secondary winding copper bar, an inductor winding copper bar, a copper bar for connecting a detection resistor, a copper bar for connecting a drive circuit and a copper bar for connecting an output terminal; wherein, said transformer primary winding copper bar, said transformer secondary winding copper bar, said inductor winding copper bar, said copper bar for connecting a detection resistor, said copper bar for connecting a drive circuit and said copper bar for connecting an output ground terminal are fixed together via injection molding.Type: GrantFiled: December 31, 2014Date of Patent: July 2, 2019Assignee: United Automotive Electronic Systems Co. Ltd.Inventors: Zhe Gao, Dengmeng Fu
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Publication number: 20180025834Abstract: An integrated copper bar for a secondary power circuit of a power electronic converter, including a transformer primary winding copper bar, a transformer secondary winding copper bar, an inductor winding copper bar, a copper bar for connecting a detection resistor, a copper bar for connecting a drive circuit and a copper bar for connecting an output terminal; wherein, said transformer primary winding copper bar, said transformer secondary winding copper bar, said inductor winding copper bar, said copper bar for connecting a detection resistor, said copper bar for connecting a drive circuit and said copper bar for connecting an output ground terminal are fixed together via injection molding.Type: ApplicationFiled: December 31, 2014Publication date: January 25, 2018Applicant: UNITED AUTOMOTIVE ELECTRONIC SYSTEMS CO. LTDInventors: Zhe GAO, Dengmeng FU
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Patent number: D808874Type: GrantFiled: March 31, 2017Date of Patent: January 30, 2018Assignee: FCA US LLCInventor: Zhe Gao
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Patent number: D824324Type: GrantFiled: April 5, 2017Date of Patent: July 31, 2018Assignee: FCA US LLCInventor: Zhe Gao