Patents by Inventor Ki-seok Chang

Ki-seok Chang 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: 20200189309
    Abstract: The present disclosure relates to an encoding method and a decoding method using a chiral metal nanostructure. The encoding method according to an aspect of the present disclosure includes preparing a plurality of metal nanostructures having a chiral structure; obtaining the optical data of the plurality of metal nanostructures, and preparing a security medium including the plurality of metal.
    Type: Application
    Filed: April 27, 2018
    Publication date: June 18, 2020
    Applicants: LG Display Co., Ltd., Seoul National University R&DB Foundation
    Inventors: Ki Seok CHANG, Sung Pil RYU, Ki Tae NAM, Wook Sung KIM, Hye Eun LEE, Hyo Yong AHN
  • Publication number: 20200166469
    Abstract: A method of manufacturing a graphene-tin oxide nanocomposite comprises dispersing graphene and tin oxide in an organic solvent to prepare a dispersion solution, drying the dispersion solution to obtain a powdery mixture, and irradiating the mixture with microwaves to obtain a graphene-tin oxide nanocomposite. Irradiation of graphene and tin oxide with microwaves results in the simplification of the manufacturing process of graphene-tin oxide nanocomposites and a decrease in manufacturing time and cost, and produce graphene-tin oxide nanocomposites at low temperatures. Further, the graphene-tin oxide nanocomposite with improved sensitivity to NO2 gas may be produced.
    Type: Application
    Filed: May 17, 2018
    Publication date: May 28, 2020
    Applicants: LG Display Co., Ltd., Industry-University Cooperation Foundation Hanyang University
    Inventors: Sung Pil RYU, Ki Seok CHANG, Wook Sung KIM, Han Saem KANG, Hyoun Woo KIM, Yong Jung KWON, Myong Sik CHOI, Sung Yong KANG, Jae Hoon BANG
  • Patent number: 10527892
    Abstract: A liquid crystal display device includes a base unit, a gate line disposed on the base unit, a data line disposed on the base unit and crossing the gate line while being insulated from the gate line, a shielding electrode disposed on the data line and overlapping the data line and isolated from the pixel electrode and a conductive bar, the conductive bar disposed on the same layer as that on which the shielding electrode is disposed, isolated from the shielding electrode, and extending in parallel to the data line.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: January 7, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hak Sun Chang, Cheol Shin, Ki Chul Shin, Se Hyun Lee, Yun Seok Lee
  • Patent number: 10474000
    Abstract: Disclosed are a liquid lens and a liquid lens module, which enhance the fill factor of a liquid lens having an inclined partition, thereby achieving a low drive voltage and a high fill factor. The liquid lens includes an oil layer and a conductive liquid inside a chamber having an inclined partition. The oil layer is formed of an oil mixture obtained by mixing at least two types of oils having different indices of refraction, and the oil mixture has the index of refraction corresponding to the index of refraction of the material in which the chamber is formed.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: November 12, 2019
    Assignees: LG Display Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Sung-Pil Ryu, Wook-Sung Kim, Han-Saem Kang, Ki-Seok Chang, Yong-Hyub Won, Jun-Sik Lee, Doo-Seub Shin
  • Patent number: 10404091
    Abstract: A coil substrate for wireless power transmission includes: an insulating substrate including a first surface and a second surface; a first wiring portion disposed on the first surface, wherein the first wiring portion includes first spiral patterns and a section in which opposing ends of each of the first spiral patterns are disposed parallel to each other; a second wiring portion disposed on the second surface and including second spiral patterns, wherein opposing ends of each of the second spiral patterns are spaced apart from each other; and conductive vias alternately connecting the first spiral patterns and the second spiral patterns to each other to form coil turns.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: September 3, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Ki Won Chang, Hyung Wook Cho, Dong Woo Han, Si Hyung Kim, Tae Seok Yang, Choon Hee Kim, Chang Mok Han, Taek Woo Kim
  • Patent number: 10390701
    Abstract: An apparatus configured to estimate biometric information includes a sensor configured to measure a light signal reflected from a subject and a temperature of the subject, and a processor configured to perform temperature correction on the light signal reflected from the subject based on the temperature of the subject using a light signal-temperature relationship between the light signal reflected from the subject and the temperature of the subject to thereby obtain a temperature-corrected light signal, and estimate the biometric information of the subject based on the temperature-corrected light signal.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: August 27, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung Yong Nam, Joon Hyung Lee, Ki Young Chang, Hyeong Seok Jang
  • Publication number: 20170363930
    Abstract: Disclosed are a liquid lens and a liquid lens module, which enhance the fill factor of a liquid lens having an inclined partition, thereby achieving a low drive voltage and a high fill factor. The liquid lens includes an oil layer and a conductive liquid inside a chamber having an inclined partition. The oil layer is formed of an oil mixture obtained by mixing at least two types of oils having different indices of refraction, and the oil mixture has the index of refraction corresponding to the index of refraction of the material in which the chamber is formed.
    Type: Application
    Filed: June 21, 2017
    Publication date: December 21, 2017
    Inventors: Sung-Pil RYU, Wook-Sung KIM, Han-Saem KANG, Ki-Seok CHANG, Yong-Hyub WON, Jun-Sik LEE, Doo-Seub SHIN
  • Patent number: 8228833
    Abstract: A method and an apparatus for transmitting additional information on digital broadcasting to an IPTV by using a home gateway are provided. The additional information on a digital broadcast program is received through an IP based home network, and a DVBSTP packet is created by using the received additional information, and the packet is transmitted to the home network. Accordingly, a user can immediately obtain various pieces of information on a current broadcast program or a next broadcast program, and thus scheduled recording can be accurately carried out by using information on a broadcast time of the broadcast program.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: July 24, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang-chul Lee, Ki-seok Chang, Akhil Chapalamadugu
  • Patent number: 7756176
    Abstract: An interband resonant tunneling intersubband transition laser is disclosed, and includes a semiconductor substrate, and a first cladding layer, an active region structure layer and a second cladding layer formed on the semiconductor substrate. The active region structure layer includes quantum well layers and quantum barrier layers that are alternately stacked and have a broken energy bandgap. Thus, the interband resonant tunneling intersubband transition laser operates in a cascade mode in which an intersubband radiative transition and interband tunneling of carriers consecutively and repetitively occur in the active region structure layer, and thus can achieve a high output from a simple, compact structure.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: July 13, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Gyungock Kim, In Gyoo Kim, Junghyung Pyo, Ki Seok Chang
  • Publication number: 20100165503
    Abstract: Disclosed are information recording/reading methods. The information recording method includes forming file data and metadata regarding the file data into recording information; dividing a predetermined recording medium into a plurality of zones when a recording mode is set; and recording file data and metadata, which are to be additionally recorded, in different zones.
    Type: Application
    Filed: August 14, 2009
    Publication date: July 1, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Won-jong Choi, Du-il Kim, Ki-seok Chang
  • Patent number: 7590611
    Abstract: A clustering method of a wireless sensor network is provided to minimize energy consumption. The clustering method includes the operations of determining a number of initial nodes within radio range of ordinary node, the ordinary nodes existing within radio range of a cluster head, and setting an ordinary node having a highest number of initial nodes among the ordinary nodes in the radio range of the cluster head, as a gateway. Because the number of usually large energy consuming cluster heads and gateways can be minimized, energy efficiency of wireless sensor network increases.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: September 15, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyeong Hur, Chung-gu Kang, Il-whan Kim, Ki-seok Chang
  • Publication number: 20080151956
    Abstract: An interband resonant tunneling intersubband transition laser is disclosed, and includes a semiconductor substrate, and a first cladding layer, an active region structure layer and a second cladding layer formed on the semiconductor substrate. The active region structure layer includes quantum well layers and quantum barrier layers that are alternately stacked and have a broken energy bandgap. Thus, the interband resonant tunneling intersubband transition laser operates in a cascade mode in which an intersubband radiative transition and interband tunneling of carriers consecutively and repetitively occur in the active region structure layer, and thus can achieve a high output from a simple, compact structure.
    Type: Application
    Filed: December 7, 2007
    Publication date: June 26, 2008
    Inventors: Gyungock KIM, In Gyoo KIM, Junghyung PYO, Ki Seok CHANG
  • Publication number: 20070157282
    Abstract: A method and apparatus for displaying information on broadcasting contents are provided. The method includes: storing received information on an electronic program guide (EPG); generating meta-data of recorded broadcasting contents based on the EPG information and storing the meta-data; and displaying the EPG information and information on the recorded broadcasting contents based on the meta-data on a screen.
    Type: Application
    Filed: September 28, 2006
    Publication date: July 5, 2007
    Inventors: Sang-shin Park, Deok-ho Kim, Kang-myeong Cho, Du-il Kim, Ki-seok Chang, Yu-seong Jeon, Hae-sik Jun, Sun-il Choi
  • Publication number: 20070133952
    Abstract: A contents reproducing method and apparatus are provided. The method of reproducing a group of contents includes: obtaining information on a plurality of pieces of contents belonging to a group to be reproduced; reading at least a part of the contents to be reproduced and buffering the part in a decoding buffer before the contents currently being reproduced are completely reproduced based on the obtained information; and seamlessly reproducing the plurality of pieces of contents based on data of the decoding buffer.
    Type: Application
    Filed: December 8, 2006
    Publication date: June 14, 2007
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-shin Park, Deok-ho Kim, Kang-myeong Cho, Du-il Kim, Yu-seong Jeon, Sun-il Choi, Hae-sik Jun, Ki-seok Chang, Nam-soon Kim
  • Publication number: 20070064637
    Abstract: A method and an apparatus for transmitting additional information on digital broadcasting to an IPTV by using a home gateway are provided. The additional information on a digital broadcast program is received through an IP based home network, and a DVBSTP packet is created by using the received additional information, and the packet is transmitted to the home network. Accordingly, a user can immediately obtain various pieces of information on a current broadcast program or a next broadcast program, and thus scheduled recording can be accurately carried out by using information on a broadcast time of the broadcast program.
    Type: Application
    Filed: September 11, 2006
    Publication date: March 22, 2007
    Inventors: Kwang-chul Lee, Ki-seok Chang, Akhil Chapalamadugu
  • Publication number: 20070064712
    Abstract: A method and apparatus that provide additional information on a digital broadcast to home network devices in a home network, the method including receiving the additional information on a digital broadcast from an external network; determining at least one device among the home network devices as a receiving device of the additional information; and transmitting the additional information to the receiving device.
    Type: Application
    Filed: September 18, 2006
    Publication date: March 22, 2007
    Inventors: Kwang-chul Lee, Ki-seok Chang, Akhil Chapalamadugu
  • Publication number: 20070050823
    Abstract: A method and apparatus for managing a plurality of tuners for providing a broadcasting service to a plurality of devices in a home network. To provide the broadcast service requested by one of the devices, it is determined whether a tuner to which any broadcast service is pre-assigned can provide the requested broadcast service along with the pre-assigned broadcast service, and the requested broadcast service is additionally assigned to the tuner. If the tuner does not exist, a tuner to which no broadcast service is assigned is detected among from the tuners that can receive a broadcast program corresponding to the requested broadcast service, and the requested broadcast service is assigned to the tuner. Accordingly, in the environment in which various broadcast services are provided to a plurality of devices through a single gateway in a network, the broadcast services can be provided to the devices.
    Type: Application
    Filed: August 25, 2006
    Publication date: March 1, 2007
    Inventors: Kwang-chul Lee, Ki-seok Chang, Akhil Chapalamadugu
  • Publication number: 20070019604
    Abstract: A media access control method of a wireless sensor network (WSN) is provided. The media access control method includes first sensor nodes, existing in a non-overlapping area where clusters do not overlap, media-accessing with a Time Division Multiple Access (TDMA) method and communicating with a Cluster head (CH) in a first section. Further, and the method includes second sensor nodes, existing in an overlapping area where the clusters overlap, media-accessing with a contention-based method and communicating with the CH in a second section. Because communication between nodes of the non-overlapping area where the clusters do not overlap, uses a reservation-based TDMA method, collision between nodes can be prevented, and because communication between nodes of the overlapping area where the clusters overlap, uses a contention-based CSMA/CA method, interference between neighboring clusters can be prevented.
    Type: Application
    Filed: April 28, 2006
    Publication date: January 25, 2007
    Inventors: Kyeong Hur, Chung-gu Kang, Ii-whan Kim, Ki-seok Chang
  • Publication number: 20060268745
    Abstract: A clustering method of a wireless sensor network is provided to minimize energy consumption. The clustering method includes the operations of determining a number of initial nodes within radio range of ordinary node, the ordinary nodes existing within radio range of a cluster head, and setting an ordinary node having a highest number of initial nodes among the ordinary nodes in the radio range of the cluster head, as a gateway. Because the number of usually large energy consuming cluster heads and gateways can be minimized, energy efficiency of wireless sensor network increases.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 30, 2006
    Inventors: Kyeong Hur, Chung-gu Kang, Il-whan Kim, Ki-seok Chang
  • Patent number: 6847314
    Abstract: An integer coding method supporting diverse frame sizes and a coder-decoder (CODEC) implementing the method are provided. Maximum sample values are detected from a plurality of frames having different numbers of samples. The detected maximum sample values are normalized on the basis of a maximum sample value of the largest frame. A maximum sample value is detected from the normalized sample values. Multiples are determined according to the size of each frame on the basis of the detected maximum sample value and a sample value of each frame is multiplied by the multiples to generate an integer code.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: January 25, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ki-seok Chang