Patents by Inventor CHUN-CHAO CHANG
CHUN-CHAO CHANG 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: 11926901Abstract: A method for fabricating nonenzymatic glucose sensor, which comprises steps of: (a) providing a bottom substrate; (b) preparing a graphene layer on the bottom substrate; (c) depositing plural amount of zinc oxide (ZnO) seed crystals on the graphene layer; (d) growing the ZnO seed crystals into columnar nanorods with hydrothermal method; (e) coating a thin film of cuprous oxide (Cu2O) on the surface of the ZnO nanorods by electrochemistry-based electrodeposition; and (f) grafting single-walled carbon nanotubes (SWCNTs) on surface of the Cu2O thin film, by using Nafion fixative composited with SWCNTs. The structure of the above sensor, therefore, comprises a bottom substrate and other components orderly assembled on it, including, from inside to outside, a graphene layer, plural amount of ZnO nanorods, a Cu2O thin film, plural amount of SWCNTs, and the Nafion fixative. Accordingly, the sensor has advantages of low cost, rapid response, and easy for preservation.Type: GrantFiled: January 10, 2020Date of Patent: March 12, 2024Assignee: NATIONAL YUNLIN UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Hsi-Chao Chen, Wei-Rong Su, Yun-Cheng Yeh, Chun-Hao Chang
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Patent number: 10078396Abstract: An optical touch sensing device and a touch signal determining method thereof are provided. The optical touch sensing device includes a light source module, at least one image capturing element and a processing unit. The light source module disposed on a touch surface provides a detecting light to the touch surface. The image capturing element captures an optical touch data along the touch surface based on the detecting light. The processing unit recognizes the optical touch data according to a recognition threshold to obtain multiple touch signals. When a object spacing between the touch signals is no bigger than a palm spacing, the processing unit compares the covering parameters corresponding to the touch signals to select a largest covering parameter among the covering parameters, and determines whether to ignore the touch signal corresponding to the largest covering parameter according to the largest covering parameter and an area threshold.Type: GrantFiled: December 31, 2014Date of Patent: September 18, 2018Assignee: Wistron CorporationInventors: Chun-Chao Chang, Yu-Yen Chen
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Patent number: 9811210Abstract: An optical touch module, a method for determining gestures thereof and a computer-readable medium are provided. The method includes the following steps. A plurality of first sensing results outputted by a first optical sensor which continuously senses a touch area from a first corner of the touch area are obtained. A plurality of second sensing results outputted by a second optical sensor which continuously senses the touch area from a second corner of the touch area are obtained. A gesture is determined according a first center of a plurality of first touch reference points of each of the first sensing results and a second center of a plurality of second touch reference points of each of the second sensing results.Type: GrantFiled: December 26, 2012Date of Patent: November 7, 2017Assignee: WISTRON CORPORATIONInventors: Hsun-Hao Chang, Yu-Yen Chen, Chun-Chao Chang, Shou-Te Wei, Sheng-Hsien Hsieh
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Publication number: 20160085373Abstract: An optical touch sensing device and a touch signal determining method thereof are provided. The optical touch sensing device includes a light source module, at least one image capturing element and a processing unit. The light source module disposed on a touch surface provides a detecting light to the touch surface. The image capturing element captures an optical touch data along the touch surface based on the detecting light. The processing unit recognizes the optical touch data according to a recognition threshold to obtain multiple touch signals. When a object spacing between the touch signals is no bigger than a palm spacing, the processing unit compares the covering parameters corresponding to the touch signals to select a largest covering parameter among the covering parameters, and determines whether to ignore the touch signal corresponding to the largest covering parameter according to the largest covering parameter and an area threshold.Type: ApplicationFiled: December 31, 2014Publication date: March 24, 2016Inventors: Chun-Chao Chang, Yu-Yen Chen
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Patent number: 9262013Abstract: A calibrating method applied to an out-cell optical touch device relative to a display panel is disclosed. The calibrating method is suitable for the out-cell optical touch device that includes at least one signal sensor and at least two position sensors. The position sensors are respectively disposed on two adjacent sides of a frame of the out-cell optical touch device. The calibrating method includes acquiring a first value according to dimensions of the display panel, detecting a distance between the frame and sides of the display panel to acquire a second value, utilizing the first value and the second value to obtain an offset, and transforming touch coordinates detected by the signal sensor into screen coordinates applied for the display panel according to the offset.Type: GrantFiled: April 1, 2014Date of Patent: February 16, 2016Assignee: Wistron CorporationInventors: Chun-Chao Chang, Yu-Yen Chen
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Patent number: 9122345Abstract: A method of determining a touch gesture is utilized for a touch control system. The method includes detecting at least one first touch point on a touch surface corresponding to the touch gesture at a first time point to generate a first detecting result; detecting at least one second touch point on the touch surface corresponding to the touch gesture at a second time point to generate a second detecting result; obtaining a moving vector and a distributing variation corresponding to the touch gesture according to a relationship of the first detecting result and the second detecting result; and determining the touch gesture on the touch surface according to the moving vector and the distributing variation.Type: GrantFiled: September 23, 2013Date of Patent: September 1, 2015Assignee: Wistron CorporationInventors: Shih-Wen Chen, Yu-Yen Chen, Chun-Chao Chang
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Publication number: 20150009181Abstract: A calibrating method applied to an out-cell optical touch device relative to a display panel is disclosed. The calibrating method is suitable for the out-cell optical touch device that includes at least one signal sensor and at least two position sensors. The position sensors are respectively disposed on two adjacent sides of a frame of the out-cell optical touch device. The calibrating method includes acquiring a first value according to dimensions of the display panel, detecting a distance between the frame and sides of the display panel to acquire a second value, utilizing the first value and the second value to obtain an offset, and transforming touch coordinates detected by the signal sensor into screen coordinates applied for the display panel according to the offset.Type: ApplicationFiled: April 1, 2014Publication date: January 8, 2015Applicant: Wistron CorporationInventors: Chun-Chao Chang, Yu-Yen Chen
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Publication number: 20140320457Abstract: A method of determining a touch gesture is utilized for a touch control system. The method includes detecting at least one first touch point on a touch surface corresponding to the touch gesture at a first time point to generate a first detecting result; detecting at least one second touch point on the touch surface corresponding to the touch gesture at a second time point to generate a second detecting result; obtaining a moving vector and a distributing variation corresponding to the touch gesture according to a relationship of the first detecting result and the second detecting result; and determining the touch gesture on the touch surface according to the moving vector and the distributing variation.Type: ApplicationFiled: September 23, 2013Publication date: October 30, 2014Applicant: Wistron CorporationInventors: Shih-Wen Chen, Yu-Yen Chen, Chun-Chao Chang
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Publication number: 20130328833Abstract: A dual-mode input apparatus is disclosed and includes a panel, a processing module, and an image-capturing system capable of capturing images in front of the panel. The image-capturing system can capture a touch input image and a gesture input device by an image-sensing component and a light-modulating component. The processing module processes the sensed images to determine input information. Alternatively, the image-capturing system can include an image-capturing device capable of rotating relative to the panel. The processing module is therefore capable of controlling rotating of the image-capturing device so as to capture a touch input image and a gesture input image selectively for the processing module to determine input information. Therefore, the dual-mode input apparatus of the invention can provide two input modes by use of the same image device, which overcomes the limitation of a conventional single image-capturing system being applied only to a single input architecture.Type: ApplicationFiled: July 20, 2012Publication date: December 12, 2013Inventors: Sheng-Hsien Hsieh, Shou-Te Wei, Chia-Te Chou, You-Xin Liu, Chun-Chao Chang
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Publication number: 20130314378Abstract: An optical touch module, a method for determining gestures thereof and a computer-readable medium are provided. The method includes the following steps. A plurality of first sensing results outputted by a first optical sensor which continuously senses a touch area from a first corner of the touch area are obtained. A plurality of second sensing results outputted by a second optical sensor which continuously senses the touch area from a second corner of the touch area are obtained. A gesture is determined according a first center of a plurality of first touch reference points of each of the first sensing results and a second center of a plurality of second touch reference points of each of the second sensing results.Type: ApplicationFiled: December 26, 2012Publication date: November 28, 2013Applicant: WISTRON CORPORATIONInventors: Hsun-Hao Chang, Yu-Yen Chen, Chun-Chao Chang, Shou-Te Wei, Sheng-Hsien Hsieh
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Patent number: 8559698Abstract: The present invention provides a method for inspecting chip defects. A raw image of a chip is used to extract a chip image. A binary chip edge image obtained from the chip image is used for inspecting defects, coordinated with statistics of edge pixels. During packaging the chip, defects that exceed inspection criteria and affect chip quality are quantitatively and accurately inspected out. The present invention has a simple procedure with high performance on inspecting defect modes and defect sizes. Thus, the present invention greatly improves performance and accuracy of inspections on chip defects for further saving a great amount of labor, time and cost.Type: GrantFiled: March 9, 2012Date of Patent: October 15, 2013Assignee: National Applied Research LaboratoriesInventors: Ming-Fu Chen, Chun-Chao Chang
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Publication number: 20130236086Abstract: The present invention provides a method for inspecting chip defects. A raw image of a chip is used to extract a chip image. A binary chip edge image obtained from the chip image is used for inspecting defects, coordinated with statistics of edge pixels. During packaging the chip, defects that exceed inspection criteria and affect chip quality are quantitatively and accurately inspected out. The present invention has a simple procedure with high performance on inspecting defect modes and defect sizes. Thus, the present invention greatly improves performance and accuracy of inspections on chip defects for further saving a great amount of labor, time and cost.Type: ApplicationFiled: March 9, 2012Publication date: September 12, 2013Applicant: NATIONAL APPLIED RESEARCH LABORATORIESInventors: Ming-Fu Chen, Chun-Chao Chang
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Publication number: 20100021380Abstract: A present invention relate to a diethylenetriaminepentaacetic acid (DTPA)-modified ferrofluid and a preparation method of the same. The DTPA-ferrofluid contains DTPA and a nano ferrofluid. The DTPA-ferrofluid can be further mixed with a peptide. Unmodified or modified peptide ferrofluids prepared from the DTPA-modified ferrofluid, such as unmodified or modified octreotide-containing or unmodified or modified lanreotide-containing ferrofluid.Type: ApplicationFiled: February 13, 2009Publication date: January 28, 2010Applicant: Institute of Nuclear Energy Research Atomic Energy Council, Executive YuanInventors: JEN-CHIEH CHUNG, KUNG-TIEN LIU, MIN-NAN CHEN, FU-DER MAI, CHUN-CHAO CHANG