Patents by Inventor Hyun Woo Choi

Hyun Woo 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).

  • Publication number: 20160212675
    Abstract: A wireless communication method for an audio-video-navigation (AVN) device of a vehicle includes: receiving position information of an estimated target base station, which is estimated based on navigation path information; receiving a handover command; comparing the position information of the estimated target base station to position information of the AVN device of the vehicle upon receiving the handover command; determining whether a first distance from the estimated target base station to the AVN device of the vehicle is within a threshold distance; requesting pre-sending with respect to the estimated target base station when the first distance is within the threshold distance; synchronizing with the estimated target base station; and generating a confirmation signal in response to the handover command.
    Type: Application
    Filed: July 28, 2015
    Publication date: July 21, 2016
    Inventor: Hyun Woo Choi
  • Patent number: 9392091
    Abstract: A method of controlling a hands-free system for a vehicle includes connecting with a cellular phone through local area communication. A call conversation state is entered when a hands-free function activates. A call termination command is received from a driver. A call termination message is transmitted to the connected cellular phone. When a success message is not received from the connected cellular phone in response to the call termination message, the call termination message is retransmitted by a preset number of times until the success message is received.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: July 12, 2016
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Hyun Woo Choi
  • Publication number: 20160197256
    Abstract: Disclosed is a new compound semiconductor material which may be used for thermoelectric material or the like, and its applications. The compound semiconductor may be represented by Chemical Formula 1 below: Chemical Formula 1 <Chemical Formula 1> Bi2TexSen?xInyMz where in Chemical Formula 1, M is at least one selected from the group consisting of Cu, Fe, Co, Ag and Ni, 2.5<x<3.0, 3.0?a<3.5, 0<y and 0?z.
    Type: Application
    Filed: September 18, 2014
    Publication date: July 7, 2016
    Applicant: LG CHEM, LTD.
    Inventors: Hyun-Woo CHOI, Byung-Kyu LIM, Tae-Hoon KIM, Cheol-Hee PARK, Eun-Ah YOU, O-Jong KWON
  • Publication number: 20160112556
    Abstract: A method of controlling a hands-free system for a vehicle includes connecting with a cellular phone through local area communication. A call conversation state is entered when a hands-free function activates. A call termination command is received from a driver. A call termination message is transmitted to the connected cellular phone. When a success message is not received from the connected cellular phone in response to the call termination message, the call termination message is retransmitted by a preset number of times until the success message is received.
    Type: Application
    Filed: October 20, 2015
    Publication date: April 21, 2016
    Inventor: Hyun Woo CHOI
  • Patent number: 8890589
    Abstract: An apparatus for measuring a high speed signal may comprise a plurality of Analog-Digital converters (AD converter) that are arranged in parallel to each other to sample an input signal at different frequencies; a plurality of frequency synthesizers configured to provide each AD converter with a different sampling frequency; a signal processor configured to receive an output of the plurality of AD converters to reconstruct the input signal; and/or a controller configured to receive and process a trigger signal.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: November 18, 2014
    Assignees: Samsung Electronics Co., Ltd., Georgia Tech Research Corporation
    Inventors: Sung Yeol Kim, Hyun Woo Choi, Nicholas Tzou, Xian Wang, Thomas Moon, Abhijit Chatterjee, Ho Sun Yoo
  • Patent number: 8819790
    Abstract: The present invention relates to a method of embodying a cooperation system between SEND and IPSec in an IPv6 environment. The cooperation system between SEND and IPSec in accordance with the present invention includes: receiving an authentication completion report message including a first IP address of a host whose authentication is completed by the SEND; generating new authentication information corresponding to the host and storing the new authentication information in a temporary storage area, if authentication information for the host is not present in the temporary storage area, wherein the authentication information includes the first IP address; and if an authentication check request message including a second IP address is received from the IPSec, checking whether the second IP address is present in the temporary storage area, and sending the result of checking to the IPSec.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: August 26, 2014
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Young-Ik Eom, Kwang-Sun Ko, Hyun-Su Jang, Hyun-jin Cho, Yong-Woo Jung, Hyun-Woo Choi, Gye-Hyeon Gyeong, Jung-Hwan Choi, Zhen Zhao, Tae-Hyoung Kim, Youn-Woo Kim
  • Patent number: 8656475
    Abstract: Disclosed is a method and system for controlling access for a mobile agent in a home network environment. The method includes the steps of: issuing a role ticket to the mobile agent; verifying access authority to service requested by the mobile agent through the role ticket; and granting the mobile agent access authority to the service. Accordingly, a table for managing access authority of a user is distributed to devices, so that it is possible to provide the mobile agent access control method and system capable of minimizing network traffic in the home network environment.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: February 18, 2014
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Young Ik Eom, Kwang Sun Ko, Hyun Su Jang, Hyun Jin Cho, Yong Woo Jung, Hyun Woo Choi, Gye Hyeon Gyeong, Jung Hwan Choi, Zhen Zhao, Tae Hyoung Kim, Youn Woo Kim
  • Publication number: 20130278295
    Abstract: An apparatus for measuring a high speed signal may comprise a plurality of Analog-Digital converters (AD converter) that are arranged in parallel to each other to sample an input signal at different frequencies; a plurality of frequency synthesizers configured to provide each AD converter with a different sampling frequency; a signal processor configured to receive an output of the plurality of AD converters to reconstruct the input signal; and/or a controller configured to receive and process a trigger signal.
    Type: Application
    Filed: February 19, 2013
    Publication date: October 24, 2013
    Applicants: GEORGIA TECH RESEARCH CORPORATION, SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Yeol KIM, Hyun Woo CHOI, Nicholas TZOU, Xian WANG, Thomas MOON, Abhijit CHATTERJEE, Ho Sun YOO
  • Patent number: 8427195
    Abstract: A digital signal generator includes an input unit configured to receive signal information of a target data signal, a controller configured to calculate at least two delay values and at least two data values, the at least two delay values and the at least two data values being used to generate a data signal corresponding to the signal information input through the input unit, a multi-phase clock generator configured to delay a reference clock signal based on the at least two delay values to generate at least two clock signals having different phases, a signal generator configured to generate at least two data signals by assigning the at least two data values to the at least two clock signals, and a logic gate unit configured to generate the data signal corresponding to the signal information input through the input unit based on the at least two data signals.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: April 23, 2013
    Assignees: Samsung Electronics Co., Ltd., Georgia Tech Research Corporation
    Inventors: Seong Kwan Lee, Hyun Woo Choi, Sung Yeol Kim, David Keezer, Carl Gray, Te-Hui Chen
  • Patent number: 7840348
    Abstract: An output control method of voice guidance signal in navigation system, the method comprising: searching for a travel route from a starting location to a destination of a vehicle; guiding the vehicle to travel along the searched travel route, and determining a current vehicle location if the vehicle is traveling, searching for a target location to be guided ahead of the traveling vehicle; generating a voice guidance signal for the searched target location to be guided; determining the priorities of a plurality of voice guidance signals in advance and outputting the voice guidance signals in sequence according to the predetermined priorities if the plurality of voice guidance signals conflict thereamong.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: November 23, 2010
    Assignee: LG Electronics Inc.
    Inventors: Su Jin Kim, Chang Won Park, Hyun Woo Choi
  • Patent number: 7653484
    Abstract: A travel route stray discriminating method of a mobile object in navigation system is disclosed in which discrimination of travel route deviation is temporarily withheld even if the mobile object has deviated from the travel route on a busy road such as a cross-road, and a warning that the mobile object has deviated from the travel route is issued if it is accurately discriminated that the mobile object has strayed from the travel route.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: January 26, 2010
    Assignee: LG Electronics Inc.
    Inventor: Hyun Woo Choi
  • Publication number: 20090323987
    Abstract: A method (200) and apparatus (100) that synchronizes audio levels of a device and an audio accessory is disclosed. In at least one embodiment, the apparatus (100) includes a housing (110) and a local speaker (130) coupled to the housing. The apparatus also includes a wireless speaker interface (180) coupled to the housing. The wireless speaker interface can be configured to send an audio signal to a remote separate speaker module wirelessly coupled to the wireless speaker interface and can be configured to send and receive volume level status data to and from the remote separate speaker module. The apparatus further includes a volume adjustment user interface (160) that can receive a user input to adjust the volume level of the remote separate speaker module. The apparatus additionally includes a controller (120).
    Type: Application
    Filed: June 26, 2008
    Publication date: December 31, 2009
    Applicant: Motorola, Inc.
    Inventors: Yuri YANG, Hyun Woo Choi
  • Publication number: 20090113538
    Abstract: Disclosed is a method and system for controlling access for a mobile agent in a home network environment. The method includes the steps of: issuing a role ticket to the mobile agent; verifying access authority to service requested by the mobile agent through the role ticket; and granting the mobile agent access authority to the service. Accordingly, a table for managing access authority of a user is distributed to devices, so that it is possible to provide the mobile agent access control method and system capable of minimizing network traffic in the home network environment.
    Type: Application
    Filed: February 18, 2008
    Publication date: April 30, 2009
    Applicant: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Young Ik Eom, Kwang Sun Ko, Hyun Su Jang, Hyun Jin Cho, Yong Woo Jung, Hyun Woo Choi, Gye Hyeon Gyeong, Jung Hwan Choi, Zhen Zhao, Tae Hyoung Kim, Youn Woo Kim
  • Publication number: 20090077642
    Abstract: The present invention relates to a method of embodying a cooperation system between SEND and IPSec in an IPv6 environment. The cooperation system between SEND and IPSec in accordance with the present invention includes: receiving an authentication completion report message including a first IP address of a host whose authentication is completed by the SEND; generating new authentication information corresponding to the host and storing the new authentication information in a temporary storage area, if authentication information for the host is not present in the temporary storage area, wherein the authentication information includes the first IP address; and if an authentication check request message including a second IP address is received from the IPSec, checking whether the second IP address is present in the temporary storage area, and sending the result of checking to the IPSec.
    Type: Application
    Filed: February 29, 2008
    Publication date: March 19, 2009
    Applicant: SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATION
    Inventors: Young-Ik EOM, Kwang-Sun Ko, Hyun-Su Jang, Hyun-jin Cho, Yong-Woo Jung, Hyun-Woo Choi, Gye-Hyeon Gyeong, Jung-Hwan Choi, Zhen Zhao, Tae-Hyoung Kim, Youn-Woo Kim
  • Patent number: D745024
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: December 8, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun-Woo Choi, Min-Soo Kwon
  • Patent number: D766315
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: September 13, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Woo Choi, Jong-Il Jeong, Sook-Kyung Lee, Ji-Hye Myung, Bong-Hee Han
  • Patent number: D766961
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: September 20, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Woo Choi, Ji-Na Lee, Jong-Il Jeong, Ji-Hye Myung, Bong-Hee Han
  • Patent number: D770475
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: November 1, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Woo Choi, Jong-Il Jeong, Sook-Kyung Lee, Ji-Hye Myung, Bong-Hee Han
  • Patent number: D770513
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: November 1, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Woo Choi, Jong-Il Jeong, Sook-Kyung Lee, Ji-Hye Myung, Bong-Hee Han
  • Patent number: D771074
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: November 8, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Woo Choi, Jong-Il Jeong, Sook-Kyung Lee, Ji-Hye Myung, Bong-Hee Han