Patents by Inventor Cheng-Nan Tsai
Cheng-Nan Tsai 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: 20250123149Abstract: A handheld electronic product includes a case and a temperature sensing device. The case has a first opening. The temperature sensing device is disposed inside the case of the handheld electronic product. The temperature sensing device includes a first substrate, a sensor chip, and a metal shielding structure. The sensor chip is disposed on the first substrate. The metal shielding structure surrounds the sensor chip, and has a second opening. The sensor chip faces towards the first opening and the second opening.Type: ApplicationFiled: December 27, 2024Publication date: April 17, 2025Inventors: CHIH-MING SUN, MING-HAN TSAI, CHENG-NAN TSAI
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Publication number: 20250093248Abstract: There is provided a smoke detector including a substrate, a light source and a light sensor. The light source and the light sensor are arranged adjacently on the substrate. The substrate is arranged with an asymmetric structure to cause an illumination region of the light source to deviate toward the light sensor thereby increasing a ratio of light intensity reflected by smoke with respect to reference light intensity.Type: ApplicationFiled: December 6, 2024Publication date: March 20, 2025Inventors: Yen-Chang Chu, Cheng-Nan Tsai, Chih-Ming Sun
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Publication number: 20250067667Abstract: There is provided an optical machine of a smoke detector including a substrate, a light source, a light sensor and a light blocking member. The light source and the light sensor are arranged on the substrate in a first direction. The light blocking member is arranged upon the light source and blocks a part of an emission angle of the light source in the first direction far away from the light sensor.Type: ApplicationFiled: November 15, 2024Publication date: February 27, 2025Inventors: CHENG-NAN TSAI, Yen-Chang Chu, Chih-Ming Sun, Chi-Chih Shen, Kuo-Hsiung Li
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Patent number: 12222246Abstract: A wearable device includes a case and a temperature sensing device. The case has a first opening. The temperature sensing device is disposed inside the case of the wearable device. The temperature sensing device includes a first substrate, a sensor chip, and a metal shielding structure. The sensor chip is disposed on the first substrate. The metal shielding structure surrounds the sensor chip, and has a second opening. The sensor chip faces towards the first opening and the second opening.Type: GrantFiled: June 7, 2023Date of Patent: February 11, 2025Assignee: PIXART IMAGING INC.Inventors: Chih-Ming Sun, Ming-Han Tsai, Cheng-Nan Tsai
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Patent number: 12203838Abstract: There is provided a smoke detector including a substrate, a light source and a light sensor. The light source and the light sensor are arranged adjacently on the substrate. The substrate is arranged with an asymmetric structure to cause an illumination region of the light source to deviate toward the light sensor thereby increasing a ratio of light intensity reflected by smoke with respect to reference light intensity.Type: GrantFiled: January 11, 2024Date of Patent: January 21, 2025Assignee: PIXART IMAGING INC.Inventors: Yen-Chang Chu, Cheng-Nan Tsai, Chih-Ming Sun
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Patent number: 12188865Abstract: There is provided an optical machine of a smoke detector including a substrate, a light source, a light sensor and a light blocking member. The light source and the light sensor are arranged on the substrate in a first direction. The light blocking member is arranged upon the light source and blocks a part of an emission angle of the light source in the first direction far away from the light sensor.Type: GrantFiled: April 15, 2022Date of Patent: January 7, 2025Assignee: PIXART IMAGING INC.Inventors: Cheng-Nan Tsai, Yen-Chang Chu, Chih-Ming Sun, Chi-Chih Shen, Kuo-Hsiung Li
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Publication number: 20240404384Abstract: There is provided a smoke detector including a first light source, a second light source surface, a light sensor and a processor. The light sensor receives reflected light when the first light source and the second light source emit light, and generates a first detection signal corresponding to light emission of the first light source and a second detection signal corresponding to light emission of the second light source. The processor distinguishes smoke and floating particles according to a similarity between the first detection signal and the second detection signal.Type: ApplicationFiled: August 13, 2024Publication date: December 5, 2024Inventors: CHENG-NAN TSAI, GUO-ZHEN WANG, CHING-KUN CHEN, YEN-CHANG CHU, CHIH-MING SUN
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Patent number: 12148279Abstract: A smoke detector includes a substrate, an optical detection module, a base and a top cover. The substrate has a ring shape region surrounding a central detection region, and a first block structure of the central detection region is protruded from the substrate and higher than an upper surface of the ring shape region. The optical detection module is disposed inside the central detection region. The base is disposed on the substrate and around the optical detection module. The base has a second block structure. The top cover is connected to the base. A lateral wall of the top cover is partly overlapped with the second block structure to form a guiding channel. The optical detection module analyzes variation of scattering parameters resulted from gaseous matter entering the top cover through the guiding channel for determining concentration of the gaseous matter.Type: GrantFiled: August 9, 2022Date of Patent: November 19, 2024Assignee: PixArt Imaging Inc.Inventors: Cheng-Nan Tsai, Yen-Chang Chu, Chih-Ming Sun
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Patent number: 12106649Abstract: There is provided a smoke detector including a first light source, a second light source surface, a light sensor and a processor. The light sensor receives reflected light when the first light source and the second light source emit light, and generates a first detection signal corresponding to light emission of the first light source and a second detection signal corresponding to light emission of the second light source. The processor distinguishes smoke and floating particles according to a similarity between the first detection signal and the second detection signal.Type: GrantFiled: November 15, 2023Date of Patent: October 1, 2024Assignee: PIXART IMAGING INC.Inventors: Cheng-Nan Tsai, Guo-Zhen Wang, Ching-Kun Chen, Yen-Chang Chu, Chih-Ming Sun
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Patent number: 12046114Abstract: A smoke detection device includes a housing, a smoke collector, an optical detector and a cover plate. The housing has a piercing hole. The smoker collector has a smoke hole, and position of the smoke hole is close to position of the piercing hole. The optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector. The cover plate is disposed between the housing and the smoke collector, and used to set a channel from the piercing hole to the smoke hole, so that gaseous matter flows from outside the smoke detection device into the smoke collector through the piercing hole and the smoke hole.Type: GrantFiled: May 11, 2022Date of Patent: July 23, 2024Assignee: PixArt Imaging Inc.Inventors: Yen-Chang Chu, Yen-Po Chen, Chih-Ming Sun, Cheng-Nan Tsai, Ching-Kun Chen
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Publication number: 20240159642Abstract: A smoke detector with an anti-insect function includes a substrate, an optical detection module, a top cover, a base and a perforated plate. The substrate has a ring shape region surrounding a central detection region, and a first block structure of the central detection region is protruded from the substrate and higher than an upper surface of the ring shape region. The optical detection module is disposed inside the central detection region. The top cover has a lateral wall. The base is disposed on the substrate and connected to the top cover to cover the optical detection module. The base has a second block structure partly overlapped with the lateral wall to form a guiding channel. The perforated plate is disposed between the lateral wall and the second block structure to prevent an insect from moving into the top cover through the guiding channel.Type: ApplicationFiled: January 25, 2024Publication date: May 16, 2024Applicant: PixArt Imaging Inc.Inventors: Yen-Chang Chu, Cheng-Nan Tsai, Chih-Ming Sun, Zhi-Hao Wu, Hung-Yu Lai
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Publication number: 20240142361Abstract: There is provided a smoke detector including a substrate, a light source and a light sensor. The light source and the light sensor are arranged adjacently on the substrate. The substrate is arranged with an asymmetric structure to cause an illumination region of the light source to deviate toward the light sensor thereby increasing a ratio of light intensity reflected by smoke with respect to reference light intensity.Type: ApplicationFiled: January 11, 2024Publication date: May 2, 2024Inventors: YEN-CHANG CHU, CHENG-NAN TSAI, CHIH-MING SUN
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Publication number: 20240078887Abstract: There is provided a smoke detector including a first light source, a second light source surface, a light sensor and a processor. The light sensor receives reflected light when the first light source and the second light source emit light, and generates a first detection signal corresponding to light emission of the first light source and a second detection signal corresponding to light emission of the second light source. The processor distinguishes smoke and floating particles according to a similarity between the first detection signal and the second detection signal.Type: ApplicationFiled: November 15, 2023Publication date: March 7, 2024Inventors: CHENG-NAN TSAI, GUO-ZHEN WANG, CHING-KUN CHEN, YEN-CHANG CHU, CHIH-MING SUN
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Patent number: 11918329Abstract: A physiological detection device includes system including a first array PPG detector, a second array PPG detector, a display and a processing unit. The first array PPG detector is configured to generate a plurality of first PPG signals. The second array PPG detector is configured to generate a plurality of second PPG signals. The display is configured to show a detected result of the physiological detection system. The processing unit is configured to convert the plurality of first PPG signals and the plurality of second PPG signals to a first 3D energy distribution and a second 3D energy distribution, respectively, and control the display to show an alert message.Type: GrantFiled: April 23, 2021Date of Patent: March 5, 2024Assignee: PIXART IMAGING INC.Inventors: Chiung-Wen Lin, Wei-Ru Han, Yang-Ming Chou, Cheng-Nan Tsai, Ren-Hau Gu, Chih-Yuan Chuang
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Patent number: 11913864Abstract: There is provided a smoke detector including a substrate, a light source and a light sensor. The light source and the light sensor are arranged adjacently on the substrate. The substrate is arranged with an asymmetric structure to cause an illumination region of the light source to deviate toward the light sensor thereby increasing a ratio of light intensity reflected by smoke with respect to reference light intensity.Type: GrantFiled: May 10, 2022Date of Patent: February 27, 2024Assignee: PIXART IMAGING INC.Inventors: Yen-Chang Chu, Cheng-Nan Tsai, Chih-Ming Sun
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Publication number: 20240054874Abstract: A smoke detector includes a substrate, an optical detection module, a base and a top cover. The substrate has a ring shape region surrounding a central detection region, and a first block structure of the central detection region is protruded from the substrate and higher than an upper surface of the ring shape region. The optical detection module is disposed inside the central detection region. The base is disposed on the substrate and around the optical detection module. The base has a second block structure. The top cover is connected to the base. A lateral wall of the top cover is partly overlapped with the second block structure to form a guiding channel. The optical detection module analyzes variation of scattering parameters resulted from gaseous matter entering the top cover through the guiding channel for determining concentration of the gaseous matter.Type: ApplicationFiled: August 9, 2022Publication date: February 15, 2024Applicant: PixArt Imaging Inc.Inventors: Cheng-Nan Tsai, Yen-Chang Chu, Chih-Ming Sun
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Patent number: 11872014Abstract: An optical detection device for physiological characteristic identification includes a substrate, a light source and an optical receiver. The light source includes a plurality of first lighting units and a plurality of second lighting units symmetrically arranged on the substrate. The optical receiver is disposed on the substrate and adapted to analyze optical signals emitted by the light source for acquiring a result of the physiological characteristic identification.Type: GrantFiled: December 28, 2021Date of Patent: January 16, 2024Assignee: PixArt Imaging Inc.Inventor: Cheng-Nan Tsai
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Patent number: 11854361Abstract: There is provided a smoke detector including a light source, a reflective surface, a light sensor and a processor. The light sensor receives reflected light when the light source emits light toward the reflective surface, and generates a reference detection signal when there is no smoke. The processor receives the detection signal from the light sensor, and automatically selects a set of predetermined condition thresholds according to a profile of the detection signal to be compared with the detection signal thereby determining whether to generate an alarm according to the comparison result.Type: GrantFiled: February 20, 2023Date of Patent: December 26, 2023Inventors: Cheng-Nan Tsai, Guo-Zhen Wang, Ching-Kun Chen, Yen-Chang Chu, Chih-Ming Sun
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Publication number: 20230314229Abstract: A wearable device includes a case and a temperature sensing device. The case has a first opening. The temperature sensing device is disposed inside the case of the wearable device. The temperature sensing device includes a first substrate, a sensor chip, and a metal shielding structure. The sensor chip is disposed on the first substrate. The metal shielding structure surrounds the sensor chip, and has a second opening. The sensor chip faces towards the first opening and the second opening.Type: ApplicationFiled: June 7, 2023Publication date: October 5, 2023Inventors: CHIH-MING SUN, MING-HAN TSAI, CHENG-NAN TSAI
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Publication number: 20230252871Abstract: A smoke detection device includes a housing, a smoke collector, an optical detector and a cover plate. The housing has a piercing hole. The smoker collector has a smoke hole, and position of the smoke hole is close to position of the piercing hole. The optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector. The cover plate is disposed between the housing and the smoke collector, and used to set a channel from the piercing hole to the smoke hole, so that gaseous matter flows from outside the smoke detection device into the smoke collector through the piercing hole and the smoke hole.Type: ApplicationFiled: May 11, 2022Publication date: August 10, 2023Applicant: PixArt Imaging Inc.Inventors: Yen-Chang Chu, Yen-Po Chen, Chih-Ming Sun, Cheng-Nan Tsai, Ching-Kun Chen