Patents by Inventor Hyun-Ho Choi

Hyun-Ho 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).

  • MEMBER FOR COTROLLING LUMINOUS FLUX, DISPLAY DEVICE, AND LIGHT EMITTING DEVICE
    Publication number: 20150109762
    Abstract: The present invention relates to a member for controlling luminous flux including an incident surface receiving light, a reflective surface reflecting the incident light, and a light emitting surface emitting the reflected light to a bottom surface of a plane perpendicular to a central axis connecting a center of the incident surface and a center of the reflective surface, and to a display device and a light emitting device, whereby performance of display device can be enhanced.
    Type: Application
    Filed: December 14, 2012
    Publication date: April 23, 2015
    Inventors: Gi Seok Lee, Eun Sung Seo, Hyun Ho Choi, Chang Hyuck Lee, Ki Cheol Kim, Lee Im Kang
  • Apparatus and method for hierarchical rate splitting in hierarchical cell communication system
    Patent number: 9014707
    Abstract: Provided is a hierarchical rate splitting method and apparatus in a hierarchical cell communication system. An upper node or a macro base station may adaptively determine a hierarchical splitting mode based on a channel condition of a channel between the macro base station and a macro terminal and/or a performance of pico terminals in comparison to a performance of the macro terminal.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: April 21, 2015
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Won Jae Shin, Wan Choi, Hyun Ho Choi, Myung Gil Kang, Chang Yong Shin, Won Jong Noh
  • MEMBER FOR CONTROLLING LUMINOUS FLUX AND DISPLAY DEVICE HAVING THE SAME
    Publication number: 20150098211
    Abstract: The exemplary embodiments of the present invention have a first refractive surface whose distance from a central axis gradually increasing as being distanced from a rear surface, and light from a light source can be effectively emitted from a first refractive surface to a lateral direction or an upper lateral direction.
    Type: Application
    Filed: December 14, 2012
    Publication date: April 9, 2015
    Inventors: Chang Hyuck Lee, Eun Sung Seo, Ki Cheol Kim, Hyun Ho Choi, Gi Seok Lee
  • System and method for aligning interference in uplink
    Patent number: 9002279
    Abstract: Provided is a method of generating a transmit beamforming vector and a receive beamforming vector to substantially eliminate the effect of interference transmitted from macro terminals to a pico base station in a hierarchical cell environment. Also, provided is a method of selecting, from a plurality of macro terminals, a macro terminal for transmitting data to a macro base station.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: April 7, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won Jae Shin, Nam Yoon Lee, Chang Yong Shin, Kyung Hun Jang, Won Jong Noh, Hyun Ho Choi
  • Platform of electric-movable bed for bedsore prevention capable of adjusting shaft according to user body type and method for controlling position change period thereof
    Patent number: 8984686
    Abstract: There is disclosed a platform of an electric-movable bed for preventing bedsores and capable of changing a shaft including a plate unit. The platform includes a plurality of main plates rotatably provided to support the human body, a plurality of sub plates rotatably and hingedly coupled to the main plates, respectively, and a locking part provided between each main plate and each sub plate to enable or lock the rotation of each main plate or sub plate, the plate unit being configured to selectively rotate a corresponding portion to a position of the joint according to a user's body type; a first driving unit configured to tilt an upper part of the human body lying on the plate unit; and a second driving unit configured to tilt a lower part of the human body lying on the plate unit.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: March 24, 2015
    Assignee: Korea Institute of Industrial Technology
    Inventors: Do Hyung Lim, Kyeoung Jin Chun, Jae Soo Hong, Hyun Ho Choi
  • Cognitive radio communication system using multiple input multiple output communication scheme
    Patent number: 8982996
    Abstract: A cognitive radio communication system using a multiple input multiple output (MIMO) communication technology is provided. A cognitive radio base station includes a plurality of antennas, a group setting unit to set at least one sensing terminal group that includes at least one sensing terminal among a plurality of terminals, and a signal generator to generate a transmission signal to transmit the transmission signal using channels formed between the plurality antennas and the plurality of terminals, so that the at least one sensing terminal is accorded a sensing time.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: March 17, 2015
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Hyun Ho Choi, Woongsup Lee, Dong Ho Cho, Ohyun Jo, Ki Song Lee
  • Beamforming method and apparatus using a rate splitting scheme in a multi-cell multi-antenna interference channel
    Patent number: 8976892
    Abstract: A beamforming method and apparatus for using a rate splitting scheme in a multi-cell multi-antenna system, are provided. The multi-cell multi-antenna system determines transmission and reception beamforming vectors, thereby being divided into a plurality of pairs of single input and single output (SISO) interference channels. A rate splitting scheme may be applied to each of the plurality of pairs.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: March 10, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won Jae Shin, Hyun Ho Choi, Nam Yoon Lee, Won Jong Noh, Chang Yong Shin, Kyung Hun Jang
  • System and method using a rate split scheme based on cooperation between receivers
    Patent number: 8971945
    Abstract: Each of a first transmitter and a second transmitter uses a rate split scheme. Each of the first transmitter and the second transmitter may transmit at least four sub-messages, and different transmission powers may be allocated to the at least four sub-messages. Also, each of receivers may cooperate with each other, may share sub-messages that act as interferences, and may extract desired messages using the shared sub-messages.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: March 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun Ho Choi, Pramod Viswanath, Chang Yong Shin, Won Jong Noh, Won-Jae Shin
  • Cognitive radio communication system recognizing interference based on known signal
    Patent number: 8958756
    Abstract: A cognitive radio (CR) communication apparatus and method is provided. A cognitive radio (CR) communication apparatus includes a signal receiving unit which receives signals from a primary user of a primary system and a secondary transmitter of a secondary system, the received signals including an element associated with at least one known signal of the secondary transmitter, and a determination unit which determines whether a signal of the primary user exists from among the received signals based on the element associated with the at least one known signal.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: February 17, 2015
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Hyun Ho Choi, Yong Ho Cho, Jung Hyun Park, Dong Jo Park
  • Communication method of macro base station and micro base station for interference control
    Patent number: 8903405
    Abstract: A communication method of a micro base station for interference control is provided. The communication method includes determining whether to perform a handover of macro user equipment from a macro base station to a micro base station based on interference from the macro user equipment served by the macro base station to micro user equipment served by the micro base station, searching for an index of a resource allocable to the macro user equipment, and transmitting, to the macro base station, a handover request message including the index of the resource allocable to the macro user equipment.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: December 2, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won Jong Noh, Chang Yong Shin, Hyun Ho Choi, Won Jae Shin
  • Communication method of neighboring terminal and target terminal
    Patent number: 8892150
    Abstract: Provided is a communication method of a neighboring terminal and a target terminal in which a cooperative terminal that has a better SINR or a better channel condition provides help to a target terminal through cooperation between terminals based on a random access mode or a scheduling mode, so that an SINR of the target terminal is improved without help from a base station.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: November 18, 2014
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Won Jong Noh, Hyun Ho Choi, Won Jae Shin, Sang Uk Park, Dong Jo Park, Chang Yong Shin, Joon Tae Kim, Seung Won Choi, Jung Min Moon, Dong Ho Cho
  • DISPLAY DEVICE
    Publication number: 20140313770
    Abstract: Disclosed is a display device. The display device includes a light source, a light guide part to receive a light emitted from the light source, a light conversion member between the light source and the light guide part, and a spacer between the light source and the light conversion member.
    Type: Application
    Filed: June 30, 2014
    Publication date: October 23, 2014
    Inventors: Seung Ryong PARK, Hyun Ho CHOI, Gi Seok LEE
  • Frequency spectrum sensing method using pilot signal and cognitive radio system using the same
    Patent number: 8868097
    Abstract: An operation method of a radio communication station is provided. The operation method of a radio communication station, the operation method including: transmitting a basic pilot signal to at least one terminal located in a coverage of a preoccupied system; and transmitting a cognitive radio (CR) pilot signal.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: October 21, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae Soo Kwon, Hyun Gi Ahn, Tae In Hyon, Kyung Hun Jang, In Sun Lee, Youngsoo Kim, Hyo Sun Hwang, Hyun Ho Choi
  • OPTICAL LENS, LIGHT EMITTING DEVICE, AND LIGHTING DEVICE
    Publication number: 20140293582
    Abstract: An optical lens, light emitting device, and lighting device are provided.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 2, 2014
    Inventors: Chang Hyuck Lee, Hyun Ho Choi, Leeim Kang, Chang Gyun Son
  • Method for multi-point cooperation considering delay in a wireless communication system
    Patent number: 8812675
    Abstract: Provided is a method of a multi-node cooperation considering a delay in a wireless communication system. A frame format may perform scheduling so that uplink cooperation terminals having a similar delay attribute may be classified into an uplink cooperation zone, to thereby prevent interference between the uplink cooperation zone and a non-cooperation zone. An extended cyclic prefix may be applied according to a delay attribute occurring due to an application of the multi-node cooperation. A cooperation base station of an uplink and a downlink may be determined based on the extended cyclic prefix.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: August 19, 2014
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Hyun Ho Choi, Jong Bu Lim, Byoung Hoon Jung, Dan Keun Sung, Seon Yeob Baek, Kab Seok Ko, Ji Young Cha
  • System and method for cooperative inter-cell interference control
    Patent number: 8787922
    Abstract: A system to cooperatively control inter-cell interference is provided. A first frequency allocated to a central area of a serving cell associated with a serving base station may be allocated to a central area of a neighboring cell associated with a neighboring base station. A second frequency allocated to an edge area of the serving cell may be allocated to an edge area of the neighboring cell. Where a terminal is located in the edge of the neighboring cell, scheduling information, channel information, and data may be exchanged between the terminal and the serving base station.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: July 22, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyo Sun Hwang, Kyung Hun Jang, Hyun Ho Choi
  • Display device
    Patent number: 8783930
    Abstract: Disclosed is a display device. The display device includes a light source, a light guide part to receive a light emitted from the light source, a light conversion member between the light source and the light guide part, and a spacer between the light source and the light conversion member.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: July 22, 2014
    Assignee: LG Innotek Co., Ltd.
    Inventors: Seung Ryong Park, Hyun Ho Choi, Gi Seok Lee
  • Access point, mobile station for wireless communication system, and method for controlling the same
    Patent number: 8761780
    Abstract: An access point (AP) and a mobile station in a wireless communication system and a method of controlling the same are provided. A method of controlling an AP in a wireless communication system includes: determining whether a transmission of a control message is needed; transmitting the control message via a first frequency band when the transmission of the control message is needed; determining whether a transmission of a data message is needed; and transmitting the data message via a second frequency band when the transmission of the data message is needed.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: June 24, 2014
    Assignees: Samsung Electronics Co., Ltd., Samsung Electro-Mechanics Co., Ltd.
    Inventors: Hyun Ho Choi, Tae In Hyon, Hyo Sun Hwang, In Sun Lee, Young Soo Kim, Hyun Gi Ahn
  • Optical Lens, Light Emitting Device Array Module Having the Same and Light Apparatus Thereof
    Publication number: 20140168970
    Abstract: A optical lens includes a lens body having a first surface, and a second surface opposite to the first surface having recessed round shape in a cross-sectional view relative to an optical axis, a plurality of first support members protruded from the first surface at a first length, and a flange unit disposed at a lateral surface connected to the first surface, wherein the flange unit having a base portion.
    Type: Application
    Filed: December 13, 2013
    Publication date: June 19, 2014
    Applicant: LG INNOTEK CO., LTD.
    Inventors: Hyun Ho Choi, Leeim Kang, ChangGyun Son, Chang Hyuck Lee
  • Cooperative communication methods and a device for a target terminal and a cooperative terminal
    Patent number: 8731553
    Abstract: Provided is a cooperative communication technology of a target terminal and a cooperative terminal. In an environment in which interference exists between cells, cooperation between terminals may be performed in order to improve quality of signals that are received from a base station.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: May 20, 2014
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Hyun Ho Choi, Dong Ho Cho, Won Jong Noh, Won Jae Shin, Jung Min Moon, Chang Bae Yoon, Dong Jo Park, Sang Uk Park