Patents by Inventor Dong-Jun Choi
Dong-Jun Choi 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: 11991922Abstract: The present disclosure provides an organic light emitting device including a first electrode, a second electrode provided to face the first electrode, and an organic material layer including a light emitting layer provided between the first electrode and the second electrode, and the light emitting layer including a compound represented by Formula 1, a compound represented by Formula 2, and a compound represented by Formula 3.Type: GrantFiled: October 11, 2019Date of Patent: May 21, 2024Assignee: LG CHEM, LTD.Inventors: Ji Young Choi, Sang Duk Suh, Woochul Lee, Joo Ho Kim, Hoon Jun Kim, Dong Hoon Lee
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Patent number: 11989381Abstract: A display device includes subpixels on a substrate, position code patterns having a predetermined position code shape, when viewed in a plan view, each position code pattern being disposed at a region between at least two adjacent subpixels, and a pixel-defining layer defining a region where each subpixel is disposed and covering the position code patterns. The plurality of position code patterns are formed in a planar code shape and are configured to reflect light incident through the pixel-defining layer.Type: GrantFiled: September 26, 2022Date of Patent: May 21, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Gi Na Yoo, Ju Yeon Kim, Won Sang Park, Chang Woo Shim, Seong Jun Lee, Dong Hee Choi
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Publication number: 20240149109Abstract: A knee joint rehabilitation apparatus for a wheelchair includes a rehabilitation apparatus frame having a height corresponding to a length of each of legs of a patient sitting on the wheelchair; an upper leg support disposed at an upper end of the rehabilitation apparatus frame and supporting upper legs of the patient thereon while the patient is sitting on the wheelchair; a lower leg support pivotably connected to the upper leg support, wherein the lower legs of the patient are seated and supported on the lower leg support; and an exercise control unit disposed on the rehabilitation apparatus frame and configured to allow the lower leg support to pivot around a connection portion between the lower leg support and the upper leg support such that the patient performs rehabilitation exercise of the knee joint thereof while sitting on the wheelchair.Type: ApplicationFiled: January 10, 2022Publication date: May 9, 2024Applicant: HEXARHUMANCARE CO., LTDInventors: Chang Soo HAN, Ho Jun KIM, Su Hyu PARK, Young Hoon JI, Jeong Ho CHO, Byung Gab RYU, Jeong Gyu PARK, Dong Eun CHOI, Cheol Woong AHN
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Patent number: 11980093Abstract: An organic light emitting device including a compound of Chemical Formula 1 and a compound of Chemical Formula 2, whereinType: GrantFiled: May 17, 2019Date of Patent: May 7, 2024Assignee: LG Chem, Ltd.Inventors: Woochul Lee, Ji Young Choi, Joo Ho Kim, Dong Hoon Lee, Sang Duk Suh, Hoon Jun Kim
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Patent number: 11969009Abstract: A cover assembly includes a mouthpiece including one end, that is configured to come into contact with a mouth of a user, and another end opposite to the one end, the mouthpiece configured to move to an open position and a closed position by rotation of the mouthpiece around the other end; and an accommodation unit for accommodating the one end of the mouthpiece in the closed position. The accommodation unit includes a button unit including a body, the button unit configured to contact the one end of the mouthpiece and to be displaced in a longitudinal direction based on the one end being pressed; and a locking unit including a body, the body of the locking unit including a first portion that is configured to contact the one end of the mouthpiece and a second portion that is configured to contact the button unit.Type: GrantFiled: March 19, 2021Date of Patent: April 30, 2024Assignee: KT&G CORPORATIONInventors: Dong Sung Kim, Heon Jun Jeong, Won Kyeong Lee, Jae Sung Choi
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Patent number: 11970613Abstract: Embodiments relate to a polymer film. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and has a haze (HZ0) before autoclave treatment of 3% or less and a ?HZ24 represented by Equation 1a of 500% or less.Type: GrantFiled: June 26, 2020Date of Patent: April 30, 2024Assignee: SK MICROWORKS CO., LTD.Inventors: Jung Hee Ki, Sunhwan Kim, Sang Hun Choi, Dae Seong Oh, Han Jun Kim, Jin Woo Lee, Dong Jin Lim
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Publication number: 20240130232Abstract: The present specification relates to a heterocyclic compound, an organic light emitting device, and a composition for an organic material layer of an organic light emitting device.Type: ApplicationFiled: July 25, 2023Publication date: April 18, 2024Applicant: LT MATERIALS CO., LTD.Inventors: Hyun-Joo LEE, Geon-Yu PARK, Young-Seok NO, Dong-Jun KIM, Dae-Hyuk CHOI
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Patent number: 11949881Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.Type: GrantFiled: April 1, 2021Date of Patent: April 2, 2024Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute for Industry Cooperation, Industry-Academia Cooperation Group of Sejong UniversityInventors: Se-Yoon Jeong, Hae-Chul Choi, Jeong-Il Seo, Seung-Kwon Beack, In-Seon Jang, Jae-Gon Kim, Kyung-Ae Moon, Dae-Young Jang, Jin-Woo Hong, Jin-Woong Kim, Yung-Lyul Lee, Dong-Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Dae-Yeon Kim, Dong-Kyun Kim
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Publication number: 20240101149Abstract: A method of automatically detecting a dynamic object recognition error in an autonomous vehicle is provided. The method includes parsing sensor data obtained by frame units from a sensor device equipped in an autonomous vehicle to generate raw data by using a parser, analyzing the raw data to output a dynamic object detection result by using a dynamic object recognition model, determining that detection of a dynamic object recognition error succeeds by using an error detector when the dynamic object detection result satisfies an error detection condition, and storing the raw data and the dynamic object detection result by using a non-volatile memory when the detection of the dynamic object recognition error succeeds.Type: ApplicationFiled: September 21, 2023Publication date: March 28, 2024Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Dong-Jin LEE, Kyoung-Wook MIN, Jeong-Woo LEE, Jeong Dan CHOI, Seung Jun HAN
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Publication number: 20240107032Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.Type: ApplicationFiled: December 7, 2023Publication date: March 28, 2024Applicants: Electronics and Telecommunications Research Institute, Kwangwoon University Industry-Academic Collaboration Foundation, University-Industry Cooperation Group of Kyung Hee UniversityInventors: Hae Chul CHOI, Se Yoon JEONG, Sung-Chang LIM, Jin Soo CHOI, Jin Woo HONG, Dong Gyu SIM, Seoung-Jun OH, Chang-Beom AHN, Gwang Hoon PARK, Seung Ryong KOOK, Sea-Nae PARK, Kwang-Su JEONG
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Publication number: 20240107878Abstract: The present specification relates to a heterocyclic compound represented by Chemical Formula 1, an organic light emitting device comprising the same, a manufacturing method thereof, and an organic material layer composition.Type: ApplicationFiled: November 30, 2021Publication date: March 28, 2024Applicant: LT MATERIALS CO., LTD.Inventors: Eui-Jeong CHOI, Young-Seok NO, Dong-Jun KIM
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Publication number: 20240092776Abstract: Disclosed (or Provided) are a heterocyclic compound and an organic light emitting device including the same.Type: ApplicationFiled: June 22, 2023Publication date: March 21, 2024Applicant: LT MATERIALS CO., LTD.Inventors: Hyung-Jin LEE, Won-Jang JEONG, Dong-Jun KIM, Dae-Hyuk CHOI
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Publication number: 20240084554Abstract: The present invention relates to an electric driven hydraulic power system for heavy equipment, and more particularly, to a hydraulic power system, which includes a hydraulic pump operated by a battery and a motor, a supply line for supplying a hydraulic oil that is supplied by the hydraulic pump, a plurality of actuators, and a controller for controlling the motor and the actuators, in which electrical efficiency is significantly improved.Type: ApplicationFiled: January 25, 2022Publication date: March 14, 2024Inventors: Kil Ho CHOI, Dong Hee LEE, Rock Jun CHOI
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Publication number: 20240082095Abstract: Disclosed is an exoskeleton-type rehabilitation robot system, including: a body part provided on a chair in which a user sits and provided with a robot arm capable of moving left or right based on the user seated on the chair; a conversion part configured to convert a position of the robot arm with respect to the body part; a driving part configured to articulate the robot arm with respect to the body part; and a controller configured to detect a change in a position of the robot arm and control a left or right driving mode of the driving part according to the position of the robot arm. In accordance with such a configuration, the exoskeleton-type rehabilitation robot system of the present invention is provided integrally with a chair, thereby having excellent space utilization. In addition, the user's initial preparation for rehabilitation training is simple, which can improve efficiency.Type: ApplicationFiled: December 27, 2021Publication date: March 14, 2024Applicant: HEXARHUMANCAR CO., LTDInventors: Chang Soo HAN, Ho Jun KIM, Su Hyun PARK, Young Hoon JI, Jeong Ho CHO, Byung Gab RYU, Jeong Gyu PARK, Dong Eun CHOI
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Publication number: 20240073416Abstract: The present invention relates to an apparatus and method for encoding and decoding an image by skip encoding. The image-encoding method by skip encoding, which performs intra-prediction, comprises: performing a filtering operation on the signal which is reconstructed prior to an encoding object signal in an encoding object image; using the filtered reconstructed signal to generate a prediction signal for the encoding object signal; setting the generated prediction signal as a reconstruction signal for the encoding object signal; and not encoding the residual signal which can be generated on the basis of the difference between the encoding object signal and the prediction signal, thereby performing skip encoding on the encoding object signal.Type: ApplicationFiled: November 6, 2023Publication date: February 29, 2024Applicants: Electronics and Telecommunications Research Institute, Kwangwoon University Industry-Academic Collaboration Foundation, Universily-lndustry Cooperation Group of Kyung Hee UniversityInventors: Sung Chang LIM, Ha Hyun LEE, Se Yoon JEONG, Hui Yong KIM, Suk Hee CHO, Jong Ho KIM, Jin Ho LEE, Jin Soo CHOI, Jin Woong KIM, Chie Teuk AHN, Dong Gyu SIM, Seoung Jun OH, Gwang Hoon PARK, Sea Nae PARK, Chan Woong JEON
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Patent number: 11914423Abstract: A flexible display device is provided. A flexible display device according to one embodiment of the present invention comprises a body, a moving plate, a first pulley, a second pulley, a driving track and a flexible display. The flexible display is coupled to outer surfaces of the moving plate and the driving track, and the driving track forms a continuous track shape by itself or together with the moving plate. Therefore, provided is the flexible display device in which a constant tension can be maintained over the entire section of the driving track while the moving plate and the driving track support the flexible display, the occurrence of spring back in the flexible display can be minimized, and damage caused by unevenness of the flexible display, and the like, can be prevented.Type: GrantFiled: April 11, 2019Date of Patent: February 27, 2024Assignee: LG ELECTRONICS INC.Inventors: Min Chul Shin, Hang Seok Kim, Gil Jae Lee, Dong Jun Choi
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Publication number: 20230396698Abstract: Provided is an electronic device that may include a flexible display including a first area and a second area, a frame including a first frame supporting the first area and a second frame supporting the second area, and a driving module for linearly moving and rotating the second frame so that the second frame moves relative to the first frame. In addition, various example embodiments are possible.Type: ApplicationFiled: March 30, 2020Publication date: December 7, 2023Applicant: LG ELECTRONICS INC.Inventors: Dong Hyun KIM, Dong Jun CHOI, A Ram SHIN, Shin Hyun CHO, Hang Seok KIM, Min Chul SHIN
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Patent number: 11775016Abstract: A display device is provided. A display device according to an embodiment of the present invention comprises a body, a moving plate, a bracket, a rack, an actuator and a driving gear. The bracket, rack, actuator and driving gear are coupled to one another to form a driving module, and the bracket comprises a moving guide, an upper cover and a heat dissipation fin. According to an embodiment of the present invention, the display device can be manufactured in which the moving plate can move reciprocatively in a stable manner with respect to the body, the heat dissipation of the actuator can be effectively performed, and the thickness and size of the driving module can be minimized.Type: GrantFiled: July 19, 2019Date of Patent: October 3, 2023Assignee: LG ELECTRONICS INC.Inventors: Dong Jun Choi, Hang Seok Kim, Min Chul Shin, Gil Jae Lee
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Publication number: 20220253103Abstract: A display device is provided. A display device according to an embodiment of the present invention comprises a body, a moving plate, a bracket, a rack, an actuator and a driving gear. The bracket, rack, actuator and driving gear are coupled to one another to form a driving module, and the bracket comprises a moving guide, an upper cover and a heat dissipation fin. According to an embodiment of the present invention, the display device can be manufactured in which the moving plate can move reciprocatively in a stable manner with respect to the body, the heat dissipation of the actuator can be effectively performed, and the thickness and size of the driving module can be minimized.Type: ApplicationFiled: July 19, 2019Publication date: August 11, 2022Applicant: LG ELECTRONICS INC.Inventors: Dong Jun CHOI, Hang Seok KIM, Min Chul SHIN, Gil Jae LEE
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Publication number: 20220155823Abstract: A flexible display device is provided. A flexible display device according to one embodiment of the present invention comprises a body, a moving plate, a first pulley, a second pulley, a driving track and a flexible display. The flexible display is coupled to outer surfaces of the moving plate and the driving track, and the driving track forms a continuous track shape by itself or together with the moving plate. Therefore, provided is the flexible display device in which a constant tension can be maintained over the entire section of the driving track while the moving plate and the driving track support the flexible display, the occurrence of spring back in the flexible display can be minimized, and damage caused by unevenness of the flexible display, and the like, can be prevented.Type: ApplicationFiled: April 11, 2019Publication date: May 19, 2022Applicant: LG ELECTRONICS INC.Inventors: Min Chul SHIN, Hang Seok KIM, Gil Jae LEE, Dong Jun CHOI