Patents by Inventor Leng-Chun Chen
Leng-Chun Chen 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: 20240064400Abstract: Real-time focusing in a slide-scanning system. In an embodiment, focus points are added to 500 an initialized focus map while acquiring a plurality of image stripes of a sample on a glass slide. For each image stripe, a plurality of frames, collectively representing the image stripe, may be acquired using both an imaging line-scan camera and a tilted focusing line-scan camera. Focus points, representing positions of best focus for trusted frames, are added to the focus map. Outlying focus points are removed from the focus map. In some cases, one or more image stripes may be reacquired. Finally, the image stripes are assembled into a composite image of the sample.Type: ApplicationFiled: November 2, 2023Publication date: February 22, 2024Inventors: Allen H. OLSON, Yunlu ZOU, Bharat ANNALDAS, Leng-Chun CHEN
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Patent number: 11863867Abstract: Real-time focusing in a slide-scanning system. In an embodiment, focus points are added to an initialized focus map while acquiring a plurality of image stripes of a sample on a glass slide. For each image stripe, a plurality of frames, collectively representing the image stripe, may be acquired using both an imaging line-scan camera and a tilted focusing line-scan camera. Focus points, representing positions of best focus for trusted frames, are added to the focus map. Outlying focus points are removed from the focus map. In some cases, one or more image stripes may be reacquired. Finally, the image stripes are assembled into a composite image of the sample.Type: GrantFiled: August 5, 2020Date of Patent: January 2, 2024Inventors: Allen H. Olson, Yunlu Zou, Bharat Annaldas, Leng-Chun Chen
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Publication number: 20220357565Abstract: Real-time autofocus. In an embodiment, a scanning apparatus includes an imaging sensor, a focusing sensor, an objective lens, and processor(s) configured to analyze image data captured by the imaging and focusing sensors, and move the objective lens. Real-time autofocus during scanning of a sample is achieved by determining a true-Z value for the objective lens for a point on a sample and for each of a plurality of regions on the sample. The true-Z values and/or surfaces calculated therefrom are used to determine a predicted-Z value for an unscanned region of the sample. The objective lens is adjusted to the predicted-Z value at the beginning of the unscanned region. After scanning the region, a true-Z value is determined for the region and compared to the predicted-Z value. A rescan of the region is initiated if the comparison exceeds a predetermined threshold.Type: ApplicationFiled: July 21, 2022Publication date: November 10, 2022Inventors: Leng-Chun CHEN, Allen OLSON, Yunlu ZOU, Peyman NAJMABADI, Greg CRANDALL
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Patent number: 11422351Abstract: Real-time autofocus. In an embodiment, a scanning apparatus includes an imaging sensor, a focusing sensor, an objective lens, and processor(s) configured to analyze image data captured by the imaging and focusing sensors, and move the objective lens. Real-time autofocus during scanning of a sample is achieved by determining a true-Z value for the objective lens for a point on a sample and for each of a plurality of regions on the sample. The true-Z values and/or surfaces calculated therefrom are used to determine a predicted-Z value for an unscanned region of the sample. The objective lens is adjusted to the predicted-Z value at the beginning of the unscanned region. After scanning the region, a true-Z value is determined for the region and compared to the predicted-Z value. A rescan of the region is initiated if the comparison exceeds a predetermined threshold.Type: GrantFiled: November 25, 2020Date of Patent: August 23, 2022Assignee: Leica Biosystems Imaging, Inc.Inventors: Leng-Chun Chen, Allen Olson, Yunlu Zou, Peyman Najmabadi, Greg Crandall
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Publication number: 20220159171Abstract: Real-time focusing in a slide-scanning system. In an embodiment, focus points are added to an initialized focus map while acquiring a plurality of image stripes of a sample on a glass slide. For each image stripe, a plurality of frames, collectively representing the image stripe, may be acquired using both an imaging line-scan camera and a tilted focusing line-scan camera. Focus points, representing positions of best focus for trusted frames, are added to the focus map. Outlying focus points are removed from the focus map. In some cases, one or more image stripes may be reacquired. Finally, the image stripes are assembled into a composite image of the sample.Type: ApplicationFiled: August 5, 2020Publication date: May 19, 2022Inventors: Allen H. Olson, Yunlu Zou, Bharat Annaldas, Leng-Chun Chen
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Publication number: 20220087555Abstract: Blood pressure measurement systems and methods that include: detecting a first wave signal from a blood vessel by using a bioinformation measurement device during a first pressing period of a wearable pressing unit, in which the wearable pressing unit exerts pressure on an upstream blood vessel relative to the blood vessel; generating an envelope signal of the first wave signal according to the first wave signal; detecting a second wave signal of the blood vessel by using the bioinformation measurement device during a second pressing period of the wearable pressing unit; determining a first timepoint where the waveform of the second wave signal intersects with the waveform of the envelope signal; outputting the pressure value that the wearable pressing unit exerts on the upstream blood vessel at the first timepoint as a systolic pressure value; determining a second timepoint where the envelope signal has a predetermined amplitude; and outputting the pressure value that the wearable pressing unit exerts on theType: ApplicationFiled: November 23, 2021Publication date: March 24, 2022Applicant: Cardio Ring Technologies, Inc.Inventors: Wen-Pin SHIH, Wei-Ting CHIEN, Leng-Chun CHEN
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Publication number: 20210103134Abstract: Real-time autofocus. In an embodiment, a scanning apparatus includes an imaging sensor, a focusing sensor, an objective lens, and processor(s) configured to analyze image data captured by the imaging and focusing sensors, and move the objective lens. Real-time autofocus during scanning of a sample is achieved by determining a true-Z value for the objective lens for a point on a sample and for each of a plurality of regions on the sample. The true-Z values and/or surfaces calculated therefrom are used to determine a predicted-Z value for an unscanned region of the sample. The objective lens is adjusted to the predicted-Z value at the beginning of the unscanned region. After scanning the region, a true-Z value is determined for the region and compared to the predicted-Z value. A rescan of the region is initiated if the comparison exceeds a predetermined threshold.Type: ApplicationFiled: November 25, 2020Publication date: April 8, 2021Inventors: Leng-Chun CHEN, Allen OLSON, Yunlu ZOU, Peyman NAJMABADI, Greg CRANDALL
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Publication number: 20210093209Abstract: The present invention provides a wearable device for monitoring blood-pressure.Type: ApplicationFiled: November 30, 2020Publication date: April 1, 2021Applicant: Cardio Ring Technologies, Inc.Inventors: Kuang-Fu CHANG, Yu-Chi WANG, Leng-Chun CHEN, Jun-Ming CHEN, Wen-Pin SHIH
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Patent number: 10955650Abstract: Two-pass capture of a macro image. In an embodiment, a scanning apparatus comprises a stage, a high-resolution camera, and a lens that provides a field of view, substantially equal in width to a slide width, to the high-resolution camera. The apparatus also comprises a first illumination system for transmission-mode illumination, and a second illumination system for reflection-mode illumination. Processor(s) move the stage in a first direction to capture a first macro image of a specimen during a single pass while the field of view is illuminated by the first illumination system, and move the stage in a second direction to capture a second macro image of the specimen during a single pass while the field of view is illuminated by the second illumination system. The processor(s) identify artifacts in the second macro image, and, based on those artifacts, correct the first macro image to generate a modified first macro image.Type: GrantFiled: March 6, 2020Date of Patent: March 23, 2021Assignee: LEICA BIOSYSTEMS IMAGING, INC.Inventors: Leng-Chun Chen, Yunlu Zou, Allen Olson, Peyman Najmabadi, Greg Crandall, Nicholas Newberg, Aaron Stearrett
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Publication number: 20210022629Abstract: The present invention provides a wearable device for monitoring blood-pressure.Type: ApplicationFiled: August 10, 2020Publication date: January 28, 2021Applicant: Cardio Ring Technologies, Inc.Inventors: Kuang-Fu CHANG, Yu-Chi WANG, Leng-Chun CHEN, Jun-Ming CHEN, Wen-Pin SHIH
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Patent number: 10852523Abstract: Real-time autofocus. In an embodiment, a scanning apparatus includes an imaging sensor, a focusing sensor, an objective lens, and processor(s) configured to analyze image data captured by the imaging and focusing sensors, and move the objective lens. Real-time autofocus during scanning of a sample is achieved by determining a true-Z value for the objective lens for a point on a sample and for each of a plurality of regions on the sample. The true-Z values and/or surfaces calculated therefrom are used to determine a predicted-Z value for an unscanned region of the sample. The objective lens is adjusted to the predicted-Z value at the beginning of the unscanned region. After scanning the region, a true-Z value is determined for the region and compared to the predicted-Z value. A rescan of the region is initiated if the comparison exceeds a predetermined threshold.Type: GrantFiled: November 5, 2019Date of Patent: December 1, 2020Assignee: LEICA BIOSYSTEMS IMAGING, INC.Inventors: Leng-Chun Chen, Allen Olson, Yunlu Zou, Peyman Najmabadi, Greg Crandall
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Patent number: 10786163Abstract: Devices and methods for monitoring blood pressure with a wearable device, which includes a contact member that concentrates radially directed tissue movement produced by arterial motion into a relatively small spot to compress the strain device. This concentration significantly increases the sensitivity of the force detecting device and allows further miniaturization of the device.Type: GrantFiled: May 31, 2019Date of Patent: September 29, 2020Assignee: Cardio Ring Technologies, Inc.Inventors: Kuang-Fu Chang, Yu-Chi Wang, Leng-Chun Chen, Jun-Ming Chen, Wen-Pin Shih
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Publication number: 20200209600Abstract: Two-pass capture of a macro image. In an embodiment, a scanning apparatus comprises a stage, a high-resolution camera, and a lens that provides a field of view, substantially equal in width to a slide width, to the high-resolution camera. The apparatus also comprises a first illumination system for transmission-mode illumination, and a second illumination system for reflection-mode illumination. Processor(s) move the stage in a first direction to capture a first macro image of a specimen during a single pass while the field of view is illuminated by the first illumination system, and move the stage in a second direction to capture a second macro image of the specimen during a single pass while the field of view is illuminated by the second illumination system. The processor(s) identify artifacts in the second macro image, and, based on those artifacts, correct the first macro image to generate a modified first macro image.Type: ApplicationFiled: March 6, 2020Publication date: July 2, 2020Inventors: Leng-Chun CHEN, Yunlu ZOU, Allen OLSON, Peyman NAJMABADI, Greg CRANDALL, Nicholas NEWBERG, Aaron STEARRETT
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Patent number: 10585273Abstract: Two-pass capture of a macro image. In an embodiment, a scanning apparatus comprises a stage, a high-resolution camera, and a lens that provides a field of view, substantially equal in width to a slide width, to the high-resolution camera. The apparatus also comprises a first illumination system for transmission-mode illumination, and a second illumination system for reflection-mode illumination. Processor(s) move the stage in a first direction to capture a first macro image of a specimen during a single pass while the field of view is illuminated by the first illumination system, and move the stage in a second direction to capture a second macro image of the specimen during a single pass while the field of view is illuminated by the second illumination system. The processor(s) identify artifacts in the second macro image, and, based on those artifacts, correct the first macro image to generate a modified first macro image.Type: GrantFiled: September 28, 2018Date of Patent: March 10, 2020Assignee: LEICA BIOSYSTEMS IMAGING, INC.Inventors: Leng-Chun Chen, Yunlu Zou, Allen Olson, Peyman Najmabadi, Greg Crandall, Nicholas Newberg, Aaron Stearrett
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Publication number: 20200064612Abstract: Real-time autofocus. In an embodiment, a scanning apparatus includes an imaging sensor, a focusing sensor, an objective lens, and processor(s) configured to analyze image data captured by the imaging and focusing sensors, and move the objective lens. Real-time autofocus during scanning of a sample is achieved by determining a true-Z value for the objective lens for a point on a sample and for each of a plurality of regions on the sample. The true-Z values and/or surfaces calculated therefrom are used to determine a predicted-Z value for an unscanned region of the sample. The objective lens is adjusted to the predicted-Z value at the beginning of the unscanned region. After scanning the region, a true-Z value is determined for the region and compared to the predicted-Z value. A rescan of the region is initiated if the comparison exceeds a predetermined threshold.Type: ApplicationFiled: November 5, 2019Publication date: February 27, 2020Inventors: Leng-Chun CHEN, Allen OLSON, Yunlu ZOU, Peyman NAJMABADI, Greg CRANDALL
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Publication number: 20190365258Abstract: The present invention provides a wearable device for monitoring blood-pressure.Type: ApplicationFiled: May 31, 2019Publication date: December 5, 2019Applicant: Cardio Ring Technologies, Inc.Inventors: Kuang-Fu CHANG, Yu-Chi WANG, Leng-Chun CHEN, Jun-Ming CHEN, Wen-Pin SHIH
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Patent number: 10481377Abstract: Real-time autofocus. In an embodiment, a scanning apparatus includes an imaging sensor, a focusing sensor, an objective lens, and processor(s) configured to analyze image data captured by the imaging and focusing sensors, and move the objective lens. Real-time autofocus during scanning of a sample is achieved by determining a true-Z value for the objective lens for a point on a sample and for each of a plurality of regions on the sample. The true-Z values and/or surfaces calculated therefrom are used to determine a predicted-Z value for an unscanned region of the sample. The objective lens is adjusted to the predicted-Z value at the beginning of the unscanned region. After scanning the region, a true-Z value is determined for the region and compared to the predicted-Z value. A rescan of the region is initiated if the comparison exceeds a predetermined threshold.Type: GrantFiled: September 28, 2018Date of Patent: November 19, 2019Assignee: LEICA BIOSYSTEMS IMAGING, INC.Inventors: Leng-Chun Chen, Allen Olson, Yunlu Zou, Peyman Najmabadi, Greg Crandall
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Patent number: 10281451Abstract: This disclosure provides a method of determining the viability of at least one cell via quantification of nicotinamide adenine dinucleotide (phosphate) (NAD(P)H), flavin adenine dinucleotide (FAD), and/or collagen. The method includes the steps of contacting the at least one cell with light having a wavelength of from 700 to 900 nm, using two photon excitation, or from 335 to 400 nm, using one photon excitation, to induce an optical response from the NAD(P)H, FAD, and/or collagen and measuring the optical response. The method also includes the step of quantifying one or more of an amount, spatial localization, and/or time-dependent response of the NAD(P)H, FAD, and/or collagen utilizing the optical response.Type: GrantFiled: July 3, 2014Date of Patent: May 7, 2019Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Mary-Ann Mycek, Stephen Feinberg, Cynthia Marcelo, William Lloyd, Leng-Chun Chen, Shiuhyang Kuo, Hyungjin Myra Kim
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Publication number: 20190101736Abstract: Two-pass capture of a macro image. In an embodiment, a scanning apparatus comprises a stage, a high-resolution camera, and a lens that provides a field of view, substantially equal in width to a slide width, to the high-resolution camera. The apparatus also comprises a first illumination system for transmission-mode illumination, and a second illumination system for reflection-mode illumination. Processor(s) move the stage in a first direction to capture a first macro image of a specimen during a single pass while the field of view is illuminated by the first illumination system, and move the stage in a second direction to capture a second macro image of the specimen during a single pass while the field of view is illuminated by the second illumination system. The processor(s) identify artifacts in the second macro image, and, based on those artifacts, correct the first macro image to generate a modified first macro image.Type: ApplicationFiled: September 28, 2018Publication date: April 4, 2019Inventors: Leng-Chun CHEN, Yunlu ZOU, Allen OLSON, Peyman NAJMABADI, Greg CRANDALL, Nicholas NEWBERG, Aaron STEARRETT
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Publication number: 20190101739Abstract: Real-time autofocus. In an embodiment, a scanning apparatus includes an imaging sensor, a focusing sensor, an objective lens, and processor(s) configured to analyze image data captured by the imaging and focusing sensors, and move the objective lens. Real-time autofocus during scanning of a sample is achieved by determining a true-Z value for the objective lens for a point on a sample and for each of a plurality of regions on the sample. The true-Z values and/or surfaces calculated therefrom are used to determine a predicted-Z value for an unscanned region of the sample. The objective lens is adjusted to the predicted-Z value at the beginning of the unscanned region. After scanning the region, a true-Z value is determined for the region and compared to the predicted-Z value. A rescan of the region is initiated if the comparison exceeds a predetermined threshold.Type: ApplicationFiled: September 28, 2018Publication date: April 4, 2019Inventors: Leng-Chun CHEN, Allen OLSON, Yunlu ZOU, Peyman NAJMABADI, Greg CRANDALL