Patents by Inventor Chengkuo Lee
Chengkuo Lee 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).
-
Patent number: 12331217Abstract: Disclosed is a method for forming a sensory textile. The method includes: providing a conductive polymer, a dopant and a solvent; mixing the conductive polymer, dopant and solvent to form a mixture having a predetermined ratio of the conductive polymer and the dopant, and a predetermined concentration of the conductive polymer; contacting a fabric with the mixture to coat the fabric with the conductive polymer and dopant; and drying the coated fabric. Also disclosed is a sensory textile device that includes such a sensory textile, a conductive backing layer and a spacer layer disposed between the sensory textile and conductive backing layer.Type: GrantFiled: October 18, 2019Date of Patent: June 17, 2025Assignee: NATIONAL UNIVERSITY OF SINGAPOREInventors: Tianyiyi He, Chengkuo Lee, Qiongfeng Shi, Hao Wang, Minglu Zhu
-
Publication number: 20250107274Abstract: A photonic device is described in an embodiment. The photonic device comprising: a 2D material layer formed on a substrate; a source electrode and a drain electrode formed on the 2D material layer; and a plurality of nanoantennas formed on the 2D material layer between the source electrode and the drain electrode. Each of the plurality of nanoantennas having dimensions associated with a resonant wavelength of the photonic device and being configured to act as a non-centrosymmetric centre for providing anisotropy to generate a photocurrent in response to a polarized light incident on the photonic device, and the polarized light having a light wavelength near the resonant wavelength. The plurality of nanoantennas comprises one or more metal layers.Type: ApplicationFiled: October 10, 2023Publication date: March 27, 2025Inventors: Junsheng XIE, Zhihao REN, Chengkuo LEE
-
Publication number: 20250020589Abstract: A metasurface uses pairs of nanorod plasmonic resonators that are arranged perpendicular to each other and have an in-plane asymmetry and an out-of-plane asymmetry in their geometric arrangement. The metasurface can be used to provide chirality sensor that provides an enhanced vibrational circular dichroism signal. The sensor can be used in various different molecule-sensing applications.Type: ApplicationFiled: July 10, 2024Publication date: January 16, 2025Applicant: National University of SingaporeInventors: Cheng XU, Zhihao REN, Chengkuo LEE
-
Publication number: 20240377252Abstract: Infrared spectrometer and method of performing infrared spectrometry.Type: ApplicationFiled: July 22, 2022Publication date: November 14, 2024Applicant: NATIONAL UNIVERSITY OF SINGAPOREInventors: Zi Heng LIM, Yi QI, Senthil Kumar ANANTHARAJAN, Chengkuo LEE, Guangya ZHOU
-
Patent number: 12124627Abstract: A wearable human machine interface (HMI) comprises a plurality of triboelectric finger bending sensors configured to sense finger bending, deflecting or curling; a triboelectric palm sensor configured to detect an applied force and its direction; and at least one mechanical stimulator configured to provide haptic feedback. The human machine interface is configured to be worn on a human hand and may take the form of a glove.Type: GrantFiled: January 5, 2021Date of Patent: October 22, 2024Assignee: NATIONAL UNIVERSITY OF SINGAPOREInventors: Minglu Zhu, Chengkuo Lee
-
Patent number: 12073022Abstract: A system to provide a human-machine interface to enable a user in a real space to act/sense in a virtual space. The system includes: a ring wearable by a finger of the user; a plurality of sensors, and a plurality of feedback units. The plurality of sensors being multimodal, including: a tactile sensor disposed on an inner surface of the ring; and a temperature sensor disposed on an outer surface of the ring. The plurality of feedback units being multimodal, including: a vibrator disposed on the ring, the vibrator being disposed on the outer surface of the ring; and a heater disposed on the inner surface of the ring. The system includes a controller configured to drive the plurality of sensors and the plurality of feedback devices to enable concurrent multimodal sensing and multimodal feedback.Type: GrantFiled: June 14, 2023Date of Patent: August 27, 2024Assignee: NATIONAL UNIVERSITY OF SINGAPOREInventors: Zhongda Sun, Chengkuo Lee, Minglu Zhu
-
Patent number: 12034383Abstract: Disclosed herein are triboelectric nanogenerators (TENGs). Such TENGs comprise at least one tribolectric (TE) layer comprising two surfaces relative movement between which generates a TE charge, and a circuit. The circuit comprises a switch, a sensor, and a load. The switch has an open condition in which the TE charge accumulates (the accumulated TE charge), and a closed condition in which the accumulated TE charge discharges between the two surfaces across the load, the sensor determining a time constant (?) of discharge of the accumulated TE charge across the load.Type: GrantFiled: August 3, 2020Date of Patent: July 9, 2024Assignee: National University of SingaporeInventors: Hao Wang, Chengkuo Lee, Tianyiyi He
-
Publication number: 20240175809Abstract: A system 300 for determining predicted component concentrations of a target mixture is described in an embodiment. The system 300 comprises a mid-infrared waveguide sensor 302 configured to measure absorption spectra and a computer 304.Type: ApplicationFiled: December 26, 2023Publication date: May 30, 2024Inventors: Jingkai Zhou, Zixuan Zhang, Zhihao Ren, Chengkuo Lee
-
Patent number: 11988600Abstract: A gas sensor, a method of manufacturing a gas sensor, a method for fabricating a micro electro-mechanical system (MEMS) die for a heater or thermopile, and a micro electro-mechanical system (MEMS) die for a heater or thermopile. The gas sensor comprises a first micro electro-mechanical system (MEMS) die comprising a light source; a second MEMS die comprising a light detector; a sample chamber disposes in an optical path between the light source and the light detector; and a holder substrate; wherein the first and second MEMS dies are disposed on the holder substrate in a vertical orientation relative to the holder.Type: GrantFiled: December 8, 2017Date of Patent: May 21, 2024Assignees: National University of Singapore, The Regents of the University of CaliforniaInventors: Enrico Macrelli, Massimo Bruno Cristiano Alioto, Chengkuo Lee, Costas John Spanos, You Qian
-
Patent number: 11965755Abstract: A triboelectric sensor comprises a substrate; at least one grid structure disposed in or on the substrate; and at least one electrode for collecting triboelectric charges that are generated by sliding of an object over a surface of the substrate; wherein the at least one grid structure is configured such that motion of the object is detectable from a signal generated by crossing of the object over at least part of the grid structure.Type: GrantFiled: October 14, 2019Date of Patent: April 23, 2024Assignee: NATIONAL UNIVERSITY OF SINGAPOREInventors: Chengkuo Lee, Qiongfeng Shi, Tao Chen
-
Patent number: 11885141Abstract: Disclosed is a sensory flooring system. The flooring system comprises a plurality of flooring segments and, for each flooring segment, one or more electrode portions. Each electrode portion is responsive to a force applied to the flooring segment and at least one electrode portion of a said flooring segment forms an electrode with at least one electrode portion of another said flooring segment. Moreover, each flooring segment comprises a unique encoding of the one or more electrode portions. Also disclosed is a sensory floor such a sensory flooring system, a receiver for receiving an electrical output from the one or more electrodes formed by said one or more electrode portions of the flooring segments, and a processor for analysing the electrical output and identifying the flooring segment by which the electrical output was produced.Type: GrantFiled: October 10, 2020Date of Patent: January 30, 2024Assignee: National University of SingaporeInventors: Qiongfeng Shi, Chengkuo Lee
-
Publication number: 20230409114Abstract: A system to provide a human-machine interface to enable a user in a real space to act/sense in a virtual space. The system includes: a ring wearable by a finger of the user; a plurality of sensors, and a plurality of feedback units. The plurality of sensors being multimodal, including: a tactile sensor disposed on an inner surface of the ring; and a temperature sensor disposed on an outer surface of the ring. The plurality of feedback units being multimodal, including: a vibrator disposed on the ring, the vibrator being disposed on the outer surface of the ring; and a heater disposed on the inner surface of the ring. The system includes a controller configured to drive the plurality of sensors and the plurality of feedback devices to enable concurrent multimodal sensing and multimodal feedback.Type: ApplicationFiled: June 14, 2023Publication date: December 21, 2023Applicant: National University of SingaporeInventors: Zhongda SUN, Chengkuo LEE, Minglu ZHU
-
Publication number: 20230020111Abstract: A wearable human machine interface (HMI) comprises a plurality of triboelectric finger bending sensors configured to sense finger bending, deflecting or curling; a triboelectric palm sensor configured to detect an applied force and its direction; and at least one mechanical stimulator configured to provide haptic feedback. The human machine interface is configured to be worn on a human hand and may take the form of a glove.Type: ApplicationFiled: January 5, 2021Publication date: January 19, 2023Inventors: Minglu ZHU, Chengkuo LEE
-
Publication number: 20220341188Abstract: Disclosed is a sensory flooring system. The flooring system comprises a plurality of flooring segments and, for each flooring segment, one or more electrode portions. Each electrode portion is responsive to a force applied to the flooring segment and at least one electrode portion of a said flooring segment forms an electrode with at least one electrode portion of another said flooring segment. Moreover, each flooring segment comprises a unique encoding of the one or more electrode portions. Also disclosed is a sensory floor such a sensory flooring system, a receiver for receiving an electrical output from the one or more electrodes formed by said one or more electrode portions of the flooring segments, and a processor for analysing the electrical output and identifying the flooring segment by which the electrical output was produced.Type: ApplicationFiled: October 10, 2020Publication date: October 27, 2022Inventors: Qiongfeng SHI, Chengkuo LEE
-
Publication number: 20220255465Abstract: Disclosed herein are triboelectric nanogenerators (TENGs). Such TENGs comprise at least one tribolectric (TE) layer comprising two surfaces relative movement between which generates a TE charge, and a circuit. The circuit comprises a switch, a sensor, and a load. The switch has an open condition in which the TE charge accumulates (the accumulated TE charge), and a closed condition in which the accumulated TE charge discharges between the two surfaces across the load, the sensor determining a time constant (?) of discharge of the accumulated TE charge across the load.Type: ApplicationFiled: August 3, 2020Publication date: August 11, 2022Inventors: Hao WANG, Chengkuo LEE, Tianyiyi HE
-
Publication number: 20210404844Abstract: A triboelectric sensor comprises a substrate; at least one grid structure disposed in or on the substrate; and at least one electrode for collecting triboelectric charges that are generated by sliding of an object over a surface of the substrate; wherein the at least one grid structure is configured such that motion of the object is detectable from a signal generated by crossing of the object over at least part of the grid structure.Type: ApplicationFiled: October 14, 2019Publication date: December 30, 2021Inventors: Chengkuo LEE, Qiongfeng SHI, Tao CHEN
-
Publication number: 20210380821Abstract: Disclosed is a method for forming a sensory textile. The method includes: providing a conductive polymer, a dopant and a solvent; mixing the conductive polymer, dopant and solvent to form a mixture having a predetermined ratio of the conductive polymer and the dopant, and a predetermined concentration of the conductive polymer; contacting a fabric with the mixture to coat the fabric with the conductive polymer and dopant; and drying the coated fabric. Also disclosed is a sensory textile device that includes such a sensory textile, a conductive backing layer and a spacer layer disposed between the sensory textile and conductive backing layer.Type: ApplicationFiled: October 18, 2019Publication date: December 9, 2021Inventors: Tianyiyi HE, Chengkuo LEE, Qiongfeng SHI, Hao WANG, Minglu ZHU
-
Publication number: 20210257932Abstract: A self-powered triboelectric based device, a self-powered triboelectric based device, a user interface, a method of providing user input, an energy harvesting device, a method of harvesting energy, a submersion-detecting device, and a method of submersion-detecting.Type: ApplicationFiled: July 11, 2019Publication date: August 19, 2021Applicant: NATIONAL UNIVERSITY OF SINGAPOREInventors: Chengkuo LEE, Qiongfeng SHI
-
Publication number: 20190360924Abstract: A gas sensor, a method of manufacturing a gas sensor, a method for fabricating a micro electro-mechanical system (MEMS) die for a heater or thermopile, and a micro electro-mechanical system (MEMS) die for a heater or thermopile. The gas sensor comprises a first micro electro-mechanical system (MEMS) die comprising a light source; a second MEMS die comprising a light detector; a sample chamber disposes in an optical path between the light source and the light detector; and a holder substrate; wherein the first and second MEMS dies are disposed on the holder substrate in a vertical orientation relative to the holder.Type: ApplicationFiled: December 8, 2017Publication date: November 28, 2019Inventors: Enrico Macrelli, Massimo Bruno Cristiano Alioto, Chengkuo Lee, Costas John Spanos, You Qian
-
Publication number: 20160346466Abstract: A microfluidic device (100) is disclosed. The device comprises a triboelectric sensor (102); an elastically deformable pump (104) arranged to transfer fluid to at least one fluid outlet (108) and triboelectrically activate the sensor; and first and second check valves (106a, 106b) respectively arranged at the inlet and outlet of the pump to control fluid transfer in and out of the pump. When the pump is actuated in conjunction with the check valves to transfer a volume of fluid, at least a portion of the sensor is triboelectrically activated according to an amount of deformation of the pump to generate a corresponding output voltage signal for enabling the volume of fluid transferred by the deformed pump to be determined. A corresponding method of using the device is also disclosed.Type: ApplicationFiled: May 25, 2016Publication date: December 1, 2016Applicant: National University of SingaporeInventors: Hao Wang, Zhuolin Xiang, Chengkuo Lee