Patents by Inventor Chang Kyu Hwang
Chang Kyu Hwang 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: 20240138226Abstract: A display device includes: a blue color filter layer in a blue transmission region of an upper substrate, and including first scattering particles; a green color filter layer in a green transmission region of the upper substrate, and including second scattering particles; a red color filter layer in a red transmission region of the upper substrate; a partition wall on the upper substrate and defining a blue transmission opening, a green transmission opening, and a red transmission opening, which overlap the blue transmission region, the green transmission region, and the red transmission region, respectively; a color conversion layer including red color conversion particles and third scattering particles, and accommodated in the red transmission opening; a light emitting element layer on a lower substrate facing the upper substrate; and a filling material between the upper substrate and the lower substrate.Type: ApplicationFiled: August 15, 2023Publication date: April 25, 2024Inventors: SUN-KYU JOO, DAEHYEON KIM, Hong Il Kim, SANGJI PARK, KEUNCHAN OH, DOKYUNG YOUN, SONGEE LEE, CHANG-MIN LEE, HYUNSHIK LEE, WOO-MAN JI, TAE HYUNG HWANG
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Publication number: 20240103362Abstract: Disclosed herein is a method of printing a nanostructure including: preparing a template substrate on which a pattern is formed; forming a replica pattern having an inverse phase of the pattern by coating a polymer thin film on an upper portion of the template substrate, adhering a thermal release tape to an upper portion of the polymer thin film, and separating the polymer thin film from the template substrate; forming a nanostructure by depositing a functional material on the replica pattern; and printing the nanostructure deposited on the replica pattern to a substrate by positioning the nanostructure on the substrate, applying heat and pressure to the nanostructure, and weakening an adhesive force between the thermal release tape and the replica pattern by the heat.Type: ApplicationFiled: September 19, 2023Publication date: March 28, 2024Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jong Min KIM, Seung Yong LEE, So Hye CHO, Ho Seong JANG, Jae Won CHOI, Chang Kyu HWANG
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Publication number: 20240091759Abstract: Disclosed herein is a method of depositing a transition metal single-atom catalyst including preparing a carbon carrier, and depositing a transition metal single-atom catalyst on the carbon carrier, in which the carbon carrier is surface-treated by an oxidation process, and wherein the deposition is carried out by an arc plasma process.Type: ApplicationFiled: September 15, 2023Publication date: March 21, 2024Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jong Min KIM, Sang Hoon KIM, Chang Kyu HWANG, Seung Yong LEE, So Hye CHO, Jae Won CHOI
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Patent number: 11480792Abstract: An electronic device is disclosed. An electronic device according to the present invention includes a display, first to third optical elements which are disposed to be dispersed on the display to emit red (R) light, green (G) light, and blue (B) light, an optical system which is installed in the display to combine light emitted from the first to third optical elements into the display, and a pinhole mirror which is installed on an illumination path of light combined by the optical system to reflect the combined light to eyeballs of a user. An electronic device according to the present invention may be associated with an artificial intelligence module, robot, augmented reality (AR) device, virtual reality (VR) device, and device related to 5G services.Type: GrantFiled: September 10, 2019Date of Patent: October 25, 2022Assignee: LG ELECTRONICS INC.Inventors: Dong Young Lee, Seung Yong Shin, Chang Kyu Hwang
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Patent number: 11398461Abstract: An electronic device comprising: a first display panel having a first side facing an eye of a user; a second display panel having a first side disposed at a second side of the first display panel; a first optical element disposed at the first display panel to emit one of red (R), green (G), or blue (B) light; a second optical element disposed at the first display panel together with the first optical element and configured to emit another one of the R, G, or B light; and a third optical element disposed at the second display panel to emit the remaining one of the R, the G, and the B light. The electronic device according to the present disclosure may be associated with an artificial intelligence module, a robot, an augmented reality (AR) device, a virtual reality (VR) device, and a device related to 5G services and the like.Type: GrantFiled: December 20, 2019Date of Patent: July 26, 2022Assignee: LG ELECTRONICS INC.Inventors: Seung Yong Shin, Sungchul Shin, Dong Young Lee, Chang Kyu Hwang
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Publication number: 20200203324Abstract: An electronic device comprising: a first display panel having a first side facing an eye of a user; a second display panel having a first side disposed at a second side of the first display panel; a first optical element disposed at the first display panel to emit one of red (R), green (G), or blue (B) light; a second optical element disposed at the first display panel together with the first optical element and configured to emit another one of the R, G, or B light; and a third optical element disposed at the second display panel to emit the remaining one of the R, the G, and the B light. The electronic device according to the present disclosure may be associated with an artificial intelligence module, a robot, an augmented reality (AR) device, a virtual reality (VR) device, and a device related to 5G services and the like.Type: ApplicationFiled: December 20, 2019Publication date: June 25, 2020Applicant: LG ELECTRONICS INC.Inventors: Seung Yong SHIN, Sungchul SHIN, Dong Young LEE, Chang Kyu HWANG
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Publication number: 20200004025Abstract: An electronic device is disclosed. An electronic device according to the present invention includes a display, first to third optical elements which are disposed to be dispersed on the display to emit red (R) light, green (G) light, and blue (B) light, an optical system which is installed in the display to combine light emitted from the first to third optical elements into the display, and a pinhole mirror which is installed on an illumination path of light combined by the optical system to reflect the combined light to eyeballs of a user. An electronic device according to the present invention may be associated with an artificial intelligence module, robot, augmented reality (AR) device, virtual reality (VR) device, and device related to 5G services.Type: ApplicationFiled: September 10, 2019Publication date: January 2, 2020Applicant: LG ELECTRONICS INC.Inventors: Dong Young LEE, Seung Yong SHIN, Chang Kyu HWANG
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Publication number: 20200004023Abstract: An electronic device is disclosed. The electronic device according to the present disclosure includes: a display which includes a display area opposite to eyeball of a user and a dummy area which is a remaining area, a plurality of optical elements disposed to be dispersed on one surface of the display, and a guide element which guides light emitted from the optical elements to the display area. An electronic device according to the present invention may be associated with an artificial intelligence module, robot, augmented reality (AR) device, virtual reality (VR) device, and device related to 5G services.Type: ApplicationFiled: September 5, 2019Publication date: January 2, 2020Applicant: LG ELECTRONICS INC.Inventors: Seung Yong SHIN, Sungchul SHIN, Dong Young LEE, Chang Kyu HWANG
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Patent number: 7820308Abstract: The present invention provides a thin film coated on a cutting tool surface made of cemented carbides, cermets or ceramics. According to the present invention, an ?-Al2O3thin film is deposited on a TiAlvBwCxNyOz (v+w+x+y+z=1, v, w, x, y, z?0) thin film in a thickness of 2-15 ?m, so that the ratio of TC (104) (denoting the texture coefficient of the (104) crystal plane of the polycrystalline ?-Al2O3 thin film) to TC (012) (denoting the texture coefficient of the (012) crystal) is more than 1.3. Cutting tools coated with such a thin film have improved wear resistance and adhesion.Type: GrantFiled: November 17, 2004Date of Patent: October 26, 2010Assignee: Korloy Inc.Inventors: Geun Woo Park, Chang Kyu Hwang, Yong Hee Choi, Yeo Kyun Yoon
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Patent number: 7691496Abstract: Disclosed herein is a cutting tool having high toughness and abrasion resistance, in which a coated cutting tool including a cemented carbide substrate, a cermet substrate or a ceramic substrate coated with a hard coating film by means of chemical vapor deposition, moderate temperature-chemical vapor deposition or physical vapor deposition, and/or a cemented carbide cutting tool, a cermet cutting tool or a ceramic cutting tool are subjected to wet blasting using 10-300 ?m sized particles to decrease residual tensile stress or increase residual compressive stress, thereby improving toughness, and also, reducing surface roughness of the cutting tool, thus remarkably increasing chipping resistance and flaking resistance.Type: GrantFiled: April 25, 2005Date of Patent: April 6, 2010Assignee: Korloy Inc.Inventors: Geun Woo Park, Chang Kyu Hwang, Yeo Kyun Yoon, Yong Hee Choi, Hyung Keun Joo, Wook Jung Sung
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Publication number: 20060003186Abstract: The present invention provides a thin film coated on a cutting tool surface made of cemented carbides, cermets or ceramics. According to the present invention, an ?-Al2O3 thin film is deposited on a TiAlvBwCxNyOz (v+w+x+y+z=1, v, w, x, y, z?0) thin film in a thickness of 2-15 ?m, so that the ratio of TC (104) (denoting the texture coefficient of the (104) crystal plane of the polycrystalline ?-Al2O3 thin film) to TC (012) (denoting the texture coefficient of the (012) crystal) is more than 1.3. Cutting tools coated with such a thin film have improved wear resistance and adhesion.Type: ApplicationFiled: November 17, 2004Publication date: January 5, 2006Applicant: KORLOY Inc.Inventors: Geun Woo Park, Chang Kyu Hwang, Yong Hee Choi, Yeo Kyun Yoon
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Patent number: 5399518Abstract: A method for manufacturing a double-cylindrical storage electrode of a capacitor of a semiconductor memory device, utilizes an outer etching mask for forming an outer cylinder and an inner etching mask for forming an inner cylinder. After forming a conductive structure on a semiconductor substrate, an outer etching mask for forming an outer cylinder and an inner etching mask for forming an inner cylinder are formed on the conductive structure. Then, the conductive structure is anisotropically etched using the outer and inner etching masks, thereby forming a double-cylindrical first electrode. Since a double-cylindrical storage electrode can be obtained from a single conductive layer, the influence of native oxidation circumvented. In addition, the double-cylindrical storage electrode of the capacitor according to the present invention decreases the risk of structural fragmenting because the electrode is obtained from one material layer, instead of a combination of layers as is conventionally-known.Type: GrantFiled: July 15, 1993Date of Patent: March 21, 1995Assignee: Samsung Electronics Co., Ltd.Inventors: Sang-pil Sim, Joo-young Yun, Chang-kyu Hwang, Jeong-gil Lee, Chul-ho Shin, Won-woo Lee