Patents by Inventor Kyeong Seok Lee
Kyeong Seok 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).
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Publication number: 20240125848Abstract: A leakage current detection circuit includes: a mirror circuit configured to copy a leakage current flowing through a node and generate a copy current in a copy node; an oscillation circuit including a charge storage unit, the oscillation circuit being connected to the copy node, charged with the copy current, and configured to generate an oscillation signal by charging and discharging the charge storage unit; and a calculation circuit configured to calculate an amount of the leakage current based on the oscillation signal.Type: ApplicationFiled: March 1, 2023Publication date: April 18, 2024Applicant: SK hynix Inc.Inventors: Jong Seok JUNG, Chan Keun KWON, Kyeong Hwan PARK, Young Kwan LEE, Suk Hwan CHOI
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Patent number: 11703621Abstract: The present invention provides an optical device including a spectral filter and an optical detection unit for detecting light passing through the spectral filter. A band-limited filter is provided on the path of light.Type: GrantFiled: March 26, 2021Date of Patent: July 18, 2023Assignee: Samsung Electronics Co., Ltd.Inventors: Kyeong Seok Lee, Gyu Weon Hwang, Won Mok Kim, In Ho Kim, Hyun Chul Kim
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Patent number: 11431291Abstract: A nano-oscillator device includes a switching element configured to be switched to an ON state at a threshold voltage or above and switched to an OFF state below a holding voltage; and a load element connected to the switching element in series. In the nano-oscillator device, vibration characteristics are implemented by using a switching element and a load element connected thereto in series. Also, the oscillation frequency of the output waveform of the oscillator may be adjusted in real time according to a gate voltage by using a field effect transistor serving as a load element. Using a synchronization characteristic in which the oscillation frequency and phase are locked with respect to an external input, it is possible to implement a computing system based on a network in which a plurality of oscillator devices are coupled.Type: GrantFiled: September 7, 2021Date of Patent: August 30, 2022Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Suyoun Lee, Seon Jeong Kim, Jong-Keuk Park, Inho Kim, Kyeong Seok Lee, Gyu Weon Hwang, Joon Young Kwak, Jaewook Kim, Yeonjoo Jeong, Jongkil Park
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Publication number: 20220156565Abstract: Embodiments of inventive concepts relate to a neuromorphic circuit including a flash memory-based spike regulator capable of generating a stable spike signal with a small number of devices. The neuromorphic circuit may generate a simple and stable spike signal using a flash memory-based spike regulator. Therefore, it is possible to implement a semiconductor neuromorphic circuit at low power and low cost by using the spike regulator of the present invention. Example embodiments of inventive concepts provide a neuromorphic circuit comprising a control signal generator for generating a control signal for generating a pulse signal; and a spike regulator for generating a spike signal in response to the control signal.Type: ApplicationFiled: March 18, 2021Publication date: May 19, 2022Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Joon Young KWAK, Suyoun LEE, Inho KIM, Jong-Keuk PARK, Kyeong Seok LEE, Jaewook KIM, Jongkil PARK, YeonJoo JEONG, Gyuweon HWANG
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Patent number: 11333812Abstract: A colored structure representing a back side-reflection color with metallic luster and high chroma when observed in a substrate incident mode greatly enhances light absorbance at a specific wavelength using a resonance structure in which a light absorbing material is inserted between a transparent substrate and an upper mirror layer. The colored structure controls metallic luster and texture of a high-chroma color from gloss-semi-gloss-matte texture in various aesthetic ways including introducing a haze surface structure in which light scattering occurs on at least one surface of the transparent substrate.Type: GrantFiled: July 12, 2019Date of Patent: May 17, 2022Assignee: Korea Institute of Science and TechnologyInventors: Kyeong Seok Lee, Doh Kwon Lee, Jeung Hyun Jeong, Won Mok Kim
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Publication number: 20220138546Abstract: A neuromorphic circuit according to example embodiments of inventive concepts includes a first neuron array including a plurality of neuron circuits generating a spike signal; a first synapse array including a plurality of first synapse circuits to process and output the spike signal transmitted from the first neuron array; a second synapse array including a plurality of second synapse circuits; a first connecting block positioned between the first synapse array and the second synapse array and connecting the first synapse array and the second synapse array in response to a control signal; and a control logic to generate the control signal. The neuromorphic circuit may easily expand the size of the synapse element array to a desired size by using a connecting block.Type: ApplicationFiled: March 18, 2021Publication date: May 5, 2022Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Joon Young KWAK, Suyoun LEE, Inho KIM, Jong-Keuk PARK, Kyeong Seok LEE, Jaewook KIM, Jongkil PARK, YeonJoo JEONG, Gyuweon HWANG
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Patent number: 11156752Abstract: Provided is an optical filter including a first filter region including a first layer of a first refractive index and a plurality of first metal nanostructures in the first layer, and a second filter region including a second layer of a second refractive index and a plurality of second metal nanostructures in the second layer, wherein the first refractive index is different from the second refractive index.Type: GrantFiled: July 31, 2017Date of Patent: October 26, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Gyu Weon Hwang, Kyeong Seok Lee, Won Mok Kim
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Publication number: 20210215863Abstract: The present invention provides an optical device including a spectral filter and an optical detection unit for detecting light passing through the spectral filter. A band-limited filter is provided on the path of light.Type: ApplicationFiled: March 26, 2021Publication date: July 15, 2021Applicant: Samsung Electronics Co., Ltd.Inventors: Kyeong Seok LEE, Gyu Weon HWANG, Won Mok KIM, In Ho KIM, Hyun Chul KIM
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Publication number: 20210187907Abstract: Provided is an optical filter including first and second reflection layers separated from each other, a dielectric region interposed between the first and second reflection layers and in which two materials of which refractive indexes are different are alternately disposed, and a buffer layer disposed between the dielectric region and at least one of the first and second reflection layers, wherein there are at least two filter regions in which relative volume ratios of the two materials alternately disposed are different.Type: ApplicationFiled: March 8, 2021Publication date: June 24, 2021Applicant: Samsung Electronics Co., Ltd.Inventors: Kyeong Seok LEE, Gyu Weon HWANG, Won Mok KIM, In Ho KIM, Wook Seong LEE, Doo Seok JEONG
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Patent number: 10989847Abstract: The present invention provides an optical device including a spectral filter and an optical detection unit for detecting light passing through the spectral filter. A band-limited filter is provided on the path of light.Type: GrantFiled: July 31, 2017Date of Patent: April 27, 2021Assignee: Samsung Electronics Co., Ltd.Inventors: Kyeong Seok Lee, Gyu Weon Hwang, Won Mok Kim, In Ho Kim, Hyun Chul Kim
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Patent number: 10908019Abstract: Present invention provides a spectrometer including a first unit spectral filter configured to absorb or reflect light in a part of a wavelength band of a light spectrum of an incident target, a second unit spectral filter configured to absorb or reflect light in a wavelength band different from the part of the wavelength band, a first light detector configured to detect a first light spectrum passing through the first unit spectral filter, a second light detector configured to detect a second light spectrum passing through the second unit spectral filter, and a processing unit configured to perform a function of restoring a light spectrum of the target incident from spectra of light detected from the first light detector and the second light detector.Type: GrantFiled: July 31, 2017Date of Patent: February 2, 2021Assignee: Samsung Electrionics Co., Ltd.Inventors: Kyeong Seok Lee, Won Mok Kim, Gyu Weon Hwang, In Ho Kim, Wook Seong Lee, Doo Seok Jeong
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Publication number: 20200274007Abstract: Provided is a color-controllable thin-film solar cell including a transparent electrode layer disposed on an absorption layer, and color structure patterns disposed on at least parts of the transparent electrode layer.Type: ApplicationFiled: March 27, 2019Publication date: August 27, 2020Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jeung Hyun JEONG, Kyeong Seok Lee, Doh Kwon Lee, Won Mok Kim, Hyeong Geun Yu
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Patent number: 10697073Abstract: A method for manufacturing an electrode for hydrogen production using a tungsten carbide nanoflake may include: forming a tungsten carbide nanoflake on a nanocrystalline diamond film by means of a chemical vapor deposition process in which hydrogen plasma is applied; and increasing activity of the tungsten carbide nanoflake to a hydrogen evolution reaction by removing an oxide layer or a graphene layer from a surface of the tungsten carbide nanoflake. Since an oxide layer and/or a graphene layer of a surface of tungsten carbide is removed by means of cyclic cleaning after tungsten carbide is formed, hydrogen evolution reaction (HER) activity of the tungsten carbide may be increased, thereby enhancing utilization as a catalyst electrode.Type: GrantFiled: May 30, 2017Date of Patent: June 30, 2020Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Wook Seong Lee, Young-Jin Ko, Young Joon Baik, Jong-Keuk Park, Kyeong Seok Lee, Inho Kim, Doo Seok Jeong
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Publication number: 20200025988Abstract: An exemplary embodiment relates to a nano-color coating layer and a method of forming the same, and more particularly, to a color structure representing a back side-reflection color with metallic luster and high chroma when observed in a substrate incident mode by greatly enhancing light absorbance at a specific wavelength using a resonance structure in which a light absorbing material is inserted between a transparent substrate and an upper mirror layer. In addition, the exemplary embodiment provides a color structure which controls metallic luster and texture of a high-chroma color from gloss-semi-gloss-matte texture in various ways by introducing a haze surface structure in which light scattering occurs on at least one surface of the transparent substrate.Type: ApplicationFiled: July 12, 2019Publication date: January 23, 2020Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Kyeong Seok LEE, Doh Kwon Lee, Jeung Hyun Jeong, Won Mok Kim
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Publication number: 20190025482Abstract: The present invention provides an optical device including a spectral filter and an optical detection unit for detecting light passing through the spectral filter. A band-limited filter is provided on the path of light.Type: ApplicationFiled: July 31, 2017Publication date: January 24, 2019Applicant: Samsung Electronics Co., Ltd.Inventors: Kyeong Seok LEE, Gyu Weon HWANG, Won Mok KIM, In Ho KIM, Hyun Chul KIM
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Publication number: 20190025120Abstract: Present invention provides a spectrometer including a first unit spectral filter configured to absorb or reflect light in a part of a wavelength band of a light spectrum of an incident target, a second unit spectral filter configured to absorb or reflect light in a wavelength band different from the part of the wavelength band, a first light detector configured to detect a first light spectrum passing through the first unit spectral filter, a second light detector configured to detect a second light spectrum passing through the second unit spectral filter, and a processing unit configured to perform a function of restoring a light spectrum of the target incident from spectra of light detected from the first light detector and the second light detector.Type: ApplicationFiled: July 31, 2017Publication date: January 24, 2019Applicant: Samsung Electronics Co., Ltd.Inventors: Kyeong Seok LEE, Won Mok KIM, Gyu Weon HWANG, In Ho KIM, Wook Seong LEE, Doo Seok JEONG
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Publication number: 20190016091Abstract: Provided is an optical filter including first and second reflection layers separated from each other, a dielectric region interposed between the first and second reflection layers and in which two materials of which refractive indexes are different are alternately disposed, and a buffer layer disposed between the dielectric region and at least one of the first and second reflection layers, wherein there are at least two filter regions in which relative volume ratios of the two materials alternately disposed are different.Type: ApplicationFiled: July 31, 2017Publication date: January 17, 2019Applicant: Samsung Electronics Co., Ltd.Inventors: Kyeong Seok LEE, Gyu Weon HWANG, Won Mok KIM, In Ho KIM, Wook Seong LEE, Doo Seok JEONG
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Publication number: 20190018188Abstract: Provided is an optical filter including a cladding layer, a plurality of metal patterns configured to form a periodic lattice structure on the cladding layer; and an optical waveguide layer on the plurality of metal patterns. Light travels from the optical waveguide layer to the cladding layer. Provided is an optical device using the optical filter.Type: ApplicationFiled: July 31, 2017Publication date: January 17, 2019Applicant: Samsung Electronics Co., Ltd.Inventors: Kyeong Seok LEE, Gyu Weon HWANG, In Ho KIM, Won Mok KIM, Wook Seong LEE, Doo Seok JEONG
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Publication number: 20190004222Abstract: Provided is an optical filter including a first filter region including a first layer of a first refractive index and a plurality of first metal nanostructures in the first layer, and a second filter region including a second layer of a second refractive index and a plurality of second metal nanostructures in the second layer, wherein the first refractive index is different from the second refractive index.Type: ApplicationFiled: July 31, 2017Publication date: January 3, 2019Applicant: Samsung Electronics Co., Ltd.Inventors: Gyu Weon HWANG, Kyeong Seok LEE, Won Mok KIM
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Publication number: 20180038003Abstract: A method for manufacturing an electrode for hydrogen production using a tungsten carbide nanoflake may include: forming a tungsten carbide nanoflake on a nanocrystalline diamond film by means of a chemical vapor deposition process in which hydrogen plasma is applied; and increasing activity of the tungsten carbide nanoflake to a hydrogen evolution reaction by removing an oxide layer or a graphene layer from a surface of the tungsten carbide nanoflake. Since an oxide layer and/or a graphene layer of a surface of tungsten carbide is removed by means of cyclic cleaning after tungsten carbide is formed, hydrogen evolution reaction (HER) activity of the tungsten carbide may be increased, thereby enhancing utilization as a catalyst electrode.Type: ApplicationFiled: May 30, 2017Publication date: February 8, 2018Inventors: Wook Seong LEE, Young-Jin KO, Young Joon BAIK, Jong-Keuk PARK, Kyeong Seok LEE, Inho KIM, Doo Seok JEONG