Patents by Inventor Young-sik Lim

Young-sik Lim 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).

  • Publication number: 20240099132
    Abstract: The present invention relates to an organic electroluminescent device comprising at least one light-emitting layer between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant; the host comprises plural host compounds; at least a first host compound of the plural host compounds has a structure of a nitrogen-containing heterocyclic linker bonded to a nitrogen atom of a carbazole of an indole-carbazole, indene-carbazole, benzofuran-carbazole, or benzothiophene-carbazole residue; and a second host compound has a carbazole-aryl-carbazole or carbazole-carbazole structure. According to the present invention, by using a specific multi-component host different from the conventional organic electroluminescent device, an organic electroluminescent device of significantly improved lifespan is provided.
    Type: Application
    Filed: November 15, 2023
    Publication date: March 21, 2024
    Inventors: Kyoung-Jin PARK, Bitnari KIM, Yoo-Jin DOH, Hyun-Ju KANG, Young-Mook LIM, Su-Hyun LEE, Chi-Sik KIM
  • Publication number: 20240079597
    Abstract: Proposed is an all-solid-state battery including a self-standing sheet layer positioned on a negative electrode current collector. The all-solid-state battery may include the negative electrode current collector, the self-standing sheet layer positioned on the negative electrode current collector, a solid electrolyte layer positioned on the sheet layer, a positive electrode active material layer positioned on the solid electrolyte layer, and a positive electrode current collector positioned on the positive electrode active material layer. The sheet layer contains carbon nanotubes.
    Type: Application
    Filed: May 4, 2023
    Publication date: March 7, 2024
    Applicants: Hyundai Motor Company, Kia Corporation, Foundation of Soongsil University-Industry Cooperation
    Inventors: Jae Min Lim, Hee Soo Kang, Young Jin Nam, Soon Chul Byun, Young Jin Jeong, Gyo Sik Kim, Hae Joo Kim, Jeong Yun Lee
  • Publication number: 20220391773
    Abstract: Provided are an artificial intelligence (AI) learning method and system and an answer relay method and system using an AI. According to an AI learning method, an AI may transmit a question to users through a messaging service and may acquire learning data for the AI through reactions of the user to the transmitted question.
    Type: Application
    Filed: August 18, 2022
    Publication date: December 8, 2022
    Applicant: LINE Corporation
    Inventors: Seok HO KANG, Jae Gwang LEE, Jea Seung JUNG, Hee-Cheol SEO, JoongJae LEE, Jeehyun LEE, Young-sik LIM, Injae LEE
  • Patent number: 11449785
    Abstract: Provided are an artificial intelligence (AI) learning method and system and an answer relay method and system using an AI. According to an AI learning method, an AI may transmit a question to users through a messaging service and may acquire learning data for the AI through reactions of the user to the transmitted question.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: September 20, 2022
    Assignee: LINE Corporation
    Inventors: Seok Ho Kang, Jae Gwang Lee, Jea Seung Jung, Hee-Cheol Seo, JoongJae Lee, Jeehyun Lee, Young-sik Lim, Injae Lee
  • Patent number: 10553146
    Abstract: A display device includes a display panel including pixels; and a timing controller to calculate a grayscale usage ratio of input data and to determine an automatic-current-limit rate based on the grayscale usage ratio, the automatic-current-limit rate representing a power saving rate.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: February 4, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Si-Beak Pyo, Min-Tak Lee, Young-Nam Yun, Kyu-Seok Kim, Hyun-Koo Lee, Young-Sik Lim
  • Patent number: 10255844
    Abstract: A head mounted display device includes a display panel including a first display region and a second display region which is arranged at a first angle with respect to the first display region; a reflective panel arranged at a second angle with respect to the second display region, to output a first transmitted light by transmitting a first light which is output from the first display region, and to output a second reflected light by reflecting a second light output from the second display region; and a lens to collect the first transmitted light and the second reflected light.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: April 9, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Min-Tak Lee, Si-Beak Pyo, Kyu-Seok Kim, Young-Nam Yun, Hyun-Koo Lee, Young-Sik Lim
  • Publication number: 20180005563
    Abstract: A head mounted display device includes a display panel including a first display region and a second display region which is arranged at a first angle with respect to the first display region; a reflective panel arranged at a second angle with respect to the second display region, to output a first transmitted light by transmitting a first light which is output from the first display region, and to output a second reflected light by reflecting a second light output from the second display region; and a lens to collect the first transmitted light and the second reflected light.
    Type: Application
    Filed: January 11, 2017
    Publication date: January 4, 2018
    Inventors: Min-Tak LEE, Si-Beak PYO, Kyu-Seok KIM, Young-Nam YUN, Hyun-Koo LEE, Young-Sik LIM
  • Publication number: 20170294156
    Abstract: A display device includes a display panel including pixels; and a timing controller to calculate a grayscale usage ratio of input data and to determine an automatic-current-limit rate based on the grayscale usage ratio, the automatic-current-limit rate representing a power saving rate.
    Type: Application
    Filed: January 18, 2017
    Publication date: October 12, 2017
    Inventors: Si-Beak PYO, Min-Tak LEE, Young-Nam YUN, Kyu-Seok KIM, Hyun-Koo LEE, Young-Sik LIM
  • Publication number: 20170243136
    Abstract: Provided are an artificial intelligence (AI) learning method and system and an answer relay method and system using an AI. According to an AI learning method, an AI may transmit a question to users through a messaging service and may acquire learning data for the AI through reactions of the user to the transmitted question.
    Type: Application
    Filed: February 16, 2017
    Publication date: August 24, 2017
    Applicant: LINE Corporation
    Inventors: Seok Ho Kang, Jae Gwang Lee, Jea Seung Jung, Hee-Cheol Seo, JoongJae Lee, Jeehyun Lee, Young-sik Lim, Injae Lee
  • Patent number: 6731620
    Abstract: A method for allocating reverse and forward channel power in a W-CDMA WLL system is disclosed.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: May 4, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-Sik Lim, Pyeong-Hwan Wee
  • Patent number: 6466547
    Abstract: A forward power control method in a PCS CDMA system to determine parameter values associates with the forward power control, which minimize interference imposed on neighboring cells by differentiating the amount of power allocation in accordance with the state of link of each subscriber, and maximize forward power control performance through a test in a laboratory by manipulating a channel change to have a sinusoidal form with a period.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: October 15, 2002
    Assignee: Samsung Electronics, Co., Ltd.
    Inventors: Young-sik Lim, Pyeong-hwan Wee
  • Patent number: 6400952
    Abstract: Method and apparatus for an idle state handoff in a cellular system includes the steps of transmitting by a current base station to a mobile telephone information regarding a frequency assignment of the neighboring base stations and a list of the neighboring base stations. A pilot signal is detected from the neighboring base stations by the mobile telephone, and it is then determined whether the detected neighboring base station is included in the list of the neighboring base stations. If the detected neighboring base station is not included in the list, it recognized as a handoff failure. If the detected neighboring base station is included in the list of the neighboring base stations, a determination as to whether the detected pilot signal is a dummy pilot signal by referring to the frequency assignment information. A frequency corresponding to the neighboring base station must be determined if the pilot signal is a dummy signal in order to perform the idle state handoff.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: June 4, 2002
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-tae Kim, Young-sik Lim
  • Publication number: 20010016493
    Abstract: Method and apparatus for an idle state handoff in a cellular system includes the steps of transmitting by a current base station to a mobile telephone information regarding a frequency assignment of the neighboring base stations and a list of the neighboring base stations. A pilot signal is detected from the neighboring base stations by the mobile telephone, and it is then determined whether the detected neighboring base station is included in the list of the neighboring base stations. If the detected neighboring base station is not included in the list, it recognized as a handoff failure. If the detected neighboring base station is included in the list of the neighboring base stations, a determination as to whether the detected pilot signal is a dummy pilot signal by referring to the frequency assignment information. A frequency corresponding to the neighboring base station must be determined if the pilot signal is a dummy signal in order to perform the idle state handoff.
    Type: Application
    Filed: September 8, 1999
    Publication date: August 23, 2001
    Inventors: SANG-TAE KIM, YOUNG-SIK LIM
  • Patent number: 6188906
    Abstract: A method for coverage optimization of a multi-frequency assignment communication system employing a dummy pilot channel, particularly a CDMA communication system. A first base station is configured to transmit communication signals to subscriber terminals using at least a first frequency allocation (FA#1) and a second frequency allocation (FA#2). A second base station transmits communication signals to subscriber terminals using FA#1 substantially more frequently than FA#2. The second base station has a dummy pilot at FA#2 which is used for handoff at FA#2. The method equalizes coverage in the first base station at FA#1 and FA#2 by transmitting the dummy pilot with less RF power than that for a pilot channel at FA#1 of the second base station, and sufficient to substantially equalize a handoff boundary between first and second cells at both FA#1 and FA#2 in an environment of more communication traffic and associated interference at FA#1 than at FA#2.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: February 13, 2001
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-sik Lim, Pyeong-hwan Wee