Patents by Inventor Hyun-Jin Cho

Hyun-Jin Cho 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).

  • Patent number: 8673605
    Abstract: The present invention relates to a method for differentiation of mesenchymal stem cells or dental pulp stem cells. More specifically, the invention relates to a method for differentiating stem cells to neural cells by applying mesenchymal stem cells or dental pulp stem cells with a low-frequency electromagnetic field. The differentiation method according to the present invention can induce differentiation even with low-cost mediums rather than induced neural differentiation mediums which are expensive due to addition of growth factors, and the neural cells differentiated according to the present invention may be useful for treatment of neurological brain diseases.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: March 18, 2014
    Assignee: Dongguk University Industry-Academic Cooperation Foundation
    Inventors: Jung-Keug Park, Sung Min Kim, Soo Chan Kim, Moon Young Yoon, Hyun Jin Cho, Young-Kwon Seo, Hee Hoon Yoon
  • Publication number: 20140049724
    Abstract: Provided is a liquid crystal display including: a lower display panel including a lower insulating substrate and a lower reflective layer; an upper display panel including an upper insulating substrate and an upper reflective layer; a liquid crystal layer positioned between the lower reflective layer of the lower display panel and the upper reflective layer of the upper display panel; and a backlight unit positioned on a lower portion of the lower display panel and including a light source, wherein a pair of field generating electrodes are formed in at least one display panel of the lower display panel and the upper display panel, wherein microcavities are formed in the lower reflective layer, the upper reflective layer, and the liquid crystal layer, and wherein a wavelength and luminance of light resonated and emitted in the microcavities are changed by an electric field generated by the field generating electrodes.
    Type: Application
    Filed: March 15, 2013
    Publication date: February 20, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae Ho YOU, Hyun Jin CHO, Dae Ho YOON, Moon Gyu LEE, Byoung Ho CHEONG
  • 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: 20140043851
    Abstract: A lighting unit for a display device includes: a plurality of light sources which emits light; a wedge-shaped light guide having an incident surface disposed close to the light sources and an opposing surface disposed opposite the incident surface; and a lens sheet disposed on the light guide, where the lens sheet includes a plurality of lenses, each having an axis in a direction from the incident surface to the opposing surface, where the light guide is thinner at the incident surface than at the opposing surface, and a radius of curvature of each of the lenses is larger at the incident surface than the opposing surface.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hyun Deok IM, Hyun Jin CHO, Oleg PRUDNIKOV, Dae Ho YOON, Byoung Ho CHEONG
  • Patent number: 8633918
    Abstract: A light waveguide has a rectangular plate shape and is configured to totally reflect internal light arriving at an angle greater than a critical angle. Light emitting parts are disposed at corners of the light waveguide. Each of the light emitting parts emits light once in a period. A first light receiving part is disposed along a first side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to a second side surface facing the first side surface of the light waveguide. The second light receiving part is disposed along the second side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to the first side surface. A detecting part detects a touch position based on an amount of the light received by the first and second light receiving parts.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: January 21, 2014
    Assignee: Samsung Display Co., Ltd
    Inventors: Jin-Hwan Kim, Hyun-Min Cho, Guk-Hyun Kim, Jong-Hee Kim, Hyun-Jin Cho
  • Patent number: 8618592
    Abstract: A semiconductor memory cell is provided that includes a trench capacitor and an access transistor. The access transistor comprises a source region, a drain region, a gate structure overlying the trench capacitor, and an active body region that couples the drain region to the source region. The active body region directly contacts the trench capacitor.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: December 31, 2013
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Hyun-Jin Cho, Sang H. Dhong, Jung-Suk Goo, Gurupada Mandal
  • Publication number: 20130202565
    Abstract: The present invention relates to a method for differentiation of mesenchymal stem cells or dental pulp stem cells. More specifically, the invention relates to a method for differentiating stem cells to neural cells by applying mesenchymal stem cells or dental pulp stem cells with a low-frequency electromagnetic field. The differentiation method according to the present invention can induce differentiation even with low-cost mediums rather than induced neural differentiation mediums which are expensive due to addition of growth factors, and the neural cells differentiated according to the present invention may be useful for treatment of neurological brain diseases.
    Type: Application
    Filed: June 8, 2011
    Publication date: August 8, 2013
    Applicant: Dongguk University Industry-Academic Cooperation Foundation
    Inventors: Jung-Keug Park, Sung Min Kim, Soo Chan Kim, Moon Young Yoon, Hyun Jin Cho, Young-Kwon Seo, Hee Hoon Yoon
  • Publication number: 20130202566
    Abstract: The present invention relates to a method for differentiation of mesenchymal stem cells. More specifically, the invention relates to a method for differentiating mesenchymal stem cells to neural cells by treating the mesenchymal stem cells with low-frequency sound waves. The differentiation method of the present invention can induce differentiation even with low-cost media rather than induced neural differentiation mediums which are expensive due to addition of growth factors, and the neural cells differentiated according to the present invention may be useful for treatment of neurological diseases.
    Type: Application
    Filed: June 8, 2011
    Publication date: August 8, 2013
    Applicant: Dongguk University Industry-Academic Cooperation Foundation
    Inventors: Jung-Keug Park, Moon Young Yoon, Hyun Jin Cho, Young-Kwon Seo, Song Hee Jeon, Hee Hoon Yoon
  • Patent number: 8261010
    Abstract: A method for distributing log block associativity in log buffer-based flash translation layer (FTL) includes, if write request on page p is generated, checking whether log block associated with corresponding data block that write request is generated exists or not by checking log block mapping table storing mapping information between data blocks and log blocks, wherein the associativity of each log block to data block is set to equal to or less than predetermined value K in advance, and K is a natural number, if log block associated with corresponding data block that write request is generated exists, checking whether associated log block is random log block or sequential log block, and if associated log block is random log block, writing data that write request is generated in first free page of random log block.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: September 4, 2012
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Young-Ik Eom, Dong-Kun Shin, Hyun-Jin Cho
  • Patent number: 8246187
    Abstract: A backlight unit includes a light source substrate on which a light source is mounted, a first light source plate which is disposed on the light source substrate and includes a cylindrical aperture corresponding to the light source, and a second light source plate which is disposed on the first light source plate and includes a partial transmission pattern on a bottom surface thereof. The partial transmission pattern corresponds to the aperture and allows part of light emitted from the light source to pass therethrough.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: August 21, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byoung-Ho Cheong, Guk-Hyun Kim, Oleg Prudnikov, Seung-Won Park, Hyun-Jin Cho
  • Patent number: 8184477
    Abstract: A switching device and methods of making and operating the same are provided. In one aspect, a method of operating a switching device is provided that includes providing a MOS transistor that has a gate, a source region, a drain region and a body region. A bipolar transistor is provided that has a collector, a base and an emitter. The body region of the MOS transistor serves as the base of the bipolar transistor and the drain region of the MOS transistor serves as the collector of the bipolar transistor. Activation of the MOS transistor causes the bipolar transistor to turn on. The MOS transistor is activated to turn on the bipolar transistor and the bipolar transistor delivers current to the source region.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: May 22, 2012
    Assignee: Advanced Micro Devices, Inc.
    Inventor: Hyun-Jin Cho
  • Publication number: 20120106196
    Abstract: A light guide plate includes a light incident surface, a light facing surface facing the light incident surface, a connection surface connecting the light incident surface with the light facing surface, and a top surface connected with the light incident surface, the light facing surface, and the connection surface. The light incident surface receives light from a light source, the light facing surface reflects light, and the top surface outputs light toward a display panel. The connection surface includes at least two absorption surfaces parallel to a straight line linking a center of an arc with an end of the light incident surface and at least one reflective surface interposed the two adjacent absorption surfaces to reflect the light.
    Type: Application
    Filed: September 14, 2011
    Publication date: May 3, 2012
    Inventors: Hyun Jin CHO, Byoungho CHEONG, Prudnikov OLEG, Hyundeok IM
  • Publication number: 20120014177
    Abstract: A switching device and methods of making and operating the same are provided. In one aspect, a method of operating a switching device is provided that includes providing a MOS transistor that has a gate, a source region, a drain region and a body region. A bipolar transistor is provided that has a collector, a base and an emitter. The body region of the MOS transistor serves as the base of the bipolar transistor and the drain region of the MOS transistor serves as the collector of the bipolar transistor. Activation of the MOS transistor causes the bipolar transistor to turn on. The MOS transistor is activated to turn on the bipolar transistor and the bipolar transistor delivers current to the source region.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 19, 2012
    Inventor: Hyun-Jin Cho
  • Publication number: 20110307631
    Abstract: A method and system for providing asynchronous data communication between a plurality of devices in a networked environment is disclosed. A user using a first device views view media content received from a first content provider of a plurality of service providers. At a request of the user, a message including a data link to the media content is generated and asynchronously sent to a second device via a network. The data link contained in the received message on the second device is used to retrieve the media content from a second content provider. Various action commands contained in the message are used to control the operation of the media content on the second device.
    Type: Application
    Filed: June 8, 2011
    Publication date: December 15, 2011
    Inventors: Sangbong Park, Cheng Zhang, Hyun Jin Cho, Lindsay John Lawrence
  • Patent number: 8048724
    Abstract: A switching device and methods of making and operating the same are provided. In one aspect, a method of operating a switching device is provided that includes providing a MOS transistor that has a gate, a source region, a drain region and a body region. A bipolar transistor is provided that has a collector, a base and an emitter. The body region of the MOS transistor serves as the base of the bipolar transistor and the drain region of the MOS transistor serves as the collector of the bipolar transistor. Activation of the MOS transistor causes the bipolar transistor to turn on. The MOS transistor is activated to turn on the bipolar transistor and the bipolar transistor delivers current to the source region.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: November 1, 2011
    Assignee: Advanced Micro Devices, Inc.
    Inventor: Hyun-Jin Cho
  • Publication number: 20110221997
    Abstract: A light waveguide has a rectangular plate shape and is configured to totally reflect internal light arriving at an angle greater than a critical angle. Light emitting parts are disposed at corners of the light waveguide. Each of the light emitting parts emits light once in a period. A first light receiving part is disposed along a first side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to a second side surface facing the first side surface of the light waveguide. The second light receiving part is disposed along the second side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to the first side surface. A detecting part detects a touch position based on an amount of the light received by the first and second light receiving parts.
    Type: Application
    Filed: December 17, 2010
    Publication date: September 15, 2011
    Inventors: Jin-Hwan Kim, Hyun-Min Cho, Guk-Hyun Kim, Jong-Hee Kim, Hyun-Jin Cho
  • Publication number: 20110204429
    Abstract: A semiconductor memory cell is provided that includes a trench capacitor and an access transistor. The access transistor comprises a source region, a drain region, a gate structure overlying the trench capacitor, and an active body region that couples the drain region to the source region. The active body region directly contacts the trench capacitor.
    Type: Application
    Filed: April 29, 2011
    Publication date: August 25, 2011
    Applicant: ADVANCED MICRO DEVICES, INC.
    Inventors: Hyun-Jin CHO, Sang H. DHONG, Jung-Suk GOO, Gurupada MANDAL
  • Patent number: 7977172
    Abstract: A method for fabricating a memory cell is provided. A trench is formed in a semiconductor structure that comprises a semiconductor layer, and a trench capacitor is formed in the trench. Conductivity determining impurities are implanted into the semiconductor structure to create a well region in the semiconductor layer that is directly coupled to the trench capacitor. A gate structure is formed overlying a portion of the well region. Conductivity determining ions are then implanted into other portions of the well region to form a source region and a drain region, and to define an active body region between the source region and the drain region. The active body region directly contacts the trench capacitor.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: July 12, 2011
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Hyun-Jin Cho, Sang H. Dhong, Jung-Suk Goo, Gurupada Mandal
  • Patent number: 7969777
    Abstract: A new memory cell can contain only a single thyristor. There is no need to include an access transistor in the cell. In one embodiment, the thyristor is a thin capacitively coupled thyristor. The new memory cell can be connected to word, bit, and control lines in several ways to form different memory arrays. Timing and voltage levels of word, bit and control lines are disclosed.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: June 28, 2011
    Assignee: T-RAM Semiconductor, Inc.
    Inventors: Hyun-Jin Cho, Farid Nemati
  • Patent number: 7961540
    Abstract: A dynamically-operating restoration circuit is used to apply a voltage or current restore pulse signal to thyristor-based memory cells and therein restore data in the cell using the internal positive feedback loop of the thyristor. In one example implementation, the internal positive feedback loop in the thyristor is used to restore the conducting state of a device after the thyristor current drops below the holding current. A pulse and/or periodic waveform are defined and applied to ensure that the thyristor is not released from its conducting state. The time average of the periodic restore current in the thyristor may be lower than the holding current threshold. While not necessarily limited to memory cells that are thyristor-based, various embodiments of the invention have been found to be the particularly useful for high-speed, low-power memory cells in which a thin capacitively-coupled thyristor is used to provide a bi-stable storage element.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: June 14, 2011
    Assignee: T-RAM Semiconductor, Inc.
    Inventors: Farid Nemati, Hyun-Jin Cho, Robert Homan Igehy