Patents by Inventor Chang-Hyun Ryu

Chang-Hyun Ryu 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: 11989448
    Abstract: Provided herein may be a memory controller and a memory system including the same. The memory controller includes a scanning period controller configured to reset, whenever scanning points sequentially arrive, access information indicating whether each of a plurality of pages is accessed, and set a scanning interval for each of the pages between the scanning points for the page based on an attribute of the page, an attribute determiner configured to determine, as a hot page or a cold page, the attribute of each of the pages based on an access interval for the page from the first scanning point among the scanning points for the page to time at which access to data stored in the page is requested, and a memory allocator configured to control first and second memory devices based on the attributes of the pages.
    Type: Grant
    Filed: August 16, 2022
    Date of Patent: May 21, 2024
    Assignee: SK hynix Inc.
    Inventors: Jun Hee Ryu, Kwang Jin Ko, Chang Hyun Park, Young Pyo Joo
  • Publication number: 20240153302
    Abstract: A display device includes a display panel; a metal plate and a filling member disposed on a same layer on a bottom surface of the display panel and that include different materials; a fingerprint sensor disposed on a bottom surface of the filling member and that overlaps the filling member; and a member-sensor bonding member disposed between the fingerprint sensor and the filling member and that bonds the fingerprint sensor to the filling member. At least a part of a side surface of the filling member and a side surface of the metal plate are spaced apart from each other with an air gap therebetween.
    Type: Application
    Filed: January 19, 2024
    Publication date: May 9, 2024
    Inventors: KWANG HYUN BAEK, Ji Hun Ryu, Chang Min Park, Jeong An Hong
  • Publication number: 20240109397
    Abstract: A method for controlling an electric heater of a vehicular heating, ventilation, and air conditioning (HVAC) system includes turning on the electric heater; determining whether an ambient air temperature of a vehicle is higher than or equal to a threshold ambient air temperature, and a battery temperature is lower than or equal to a threshold battery temperature; determining whether battery efficiency is lower than or equal to threshold efficiency when the ambient air temperature of the vehicle is higher than or equal to the threshold ambient air temperature, and the battery temperature is lower than or equal to the threshold battery temperature; and turning off the electric heater when the battery efficiency is lower than or equal to the threshold efficiency, wherein the electric heater is configured to receive electric energy from the battery.
    Type: Application
    Filed: March 30, 2023
    Publication date: April 4, 2024
    Inventors: Dae Hyun Song, Chang Gi Ryu, Woo Jin Lee, Dong Ju Ko, Hyun Hun Choi, Chun Kyu Kwon, In Uk Ko
  • Publication number: 20240099129
    Abstract: The present invention relates to a composition for an organic optoelectronic device, the composition comprising: a first host compound represented by Chemical Formula 1 below; and a second host compound represented by Chemical Formula 2 below, to an organic optoelectronic device using the composition and a display device. The details of Chemical Formulas 1 and 2 above are as defined in the specification.
    Type: Application
    Filed: November 7, 2023
    Publication date: March 21, 2024
    Inventors: Dong Wan RYU, Chang Ju SHIN, Seungjae LEE, Hyung Sun KIM, Yuna JANG, Eun Sun YU, Sung-Hyun JUNG
  • Publication number: 20240082095
    Abstract: Disclosed is an exoskeleton-type rehabilitation robot system, including: a body part provided on a chair in which a user sits and provided with a robot arm capable of moving left or right based on the user seated on the chair; a conversion part configured to convert a position of the robot arm with respect to the body part; a driving part configured to articulate the robot arm with respect to the body part; and a controller configured to detect a change in a position of the robot arm and control a left or right driving mode of the driving part according to the position of the robot arm. In accordance with such a configuration, the exoskeleton-type rehabilitation robot system of the present invention is provided integrally with a chair, thereby having excellent space utilization. In addition, the user's initial preparation for rehabilitation training is simple, which can improve efficiency.
    Type: Application
    Filed: December 27, 2021
    Publication date: March 14, 2024
    Applicant: HEXARHUMANCAR CO., LTD
    Inventors: Chang Soo HAN, Ho Jun KIM, Su Hyun PARK, Young Hoon JI, Jeong Ho CHO, Byung Gab RYU, Jeong Gyu PARK, Dong Eun CHOI
  • Publication number: 20240090325
    Abstract: The present invention relates to a composition for an organic optoelectronic device, the composition comprising: a first host compound represented by Chemical Formula 1 below; and a second host compound represented by Chemical Formula 2 below, to an organic optoelectronic device using the composition and a display device. The details of Chemical Formulas 1 and 2 above are as defined in the specification.
    Type: Application
    Filed: November 7, 2023
    Publication date: March 14, 2024
    Inventors: Dong Wan RYU, Chang Ju SHIN, Seungjae LEE, Hyung Sun KIM, Yuna JANG, Eun Sun YU, Sung-Hyun JUNG
  • Patent number: 11923610
    Abstract: In various embodiments, an antenna array may comprise a dielectric; a first patch antenna disposed on a first region of the dielectric; a second patch antenna disposed on a second region of the dielectric; and a ground layer including a first sub-ground layer in contact with a lower portion of the first region of the dielectric, a third sub-ground layer in contact with a lower portion of the second region of the dielectric, and a second sub-ground layer spaced apart from a lower portion between the first region and the second region of the dielectric.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: March 5, 2024
    Assignees: Samsung Electronics Co., Ltd., HONGIK UNIVERSITY INDUSTRY-ACADEMIA COOPERATION FOUNDATION
    Inventors: Jae-Hyun Park, Jeong-Hae Lee, Min-Seo Park, Young-Ho Ryu, Sung-Bum Park, Kwi-Seob Um, Chong-Min Lee, Chang-Hyun Lee
  • Patent number: 9196185
    Abstract: A testing apparatus for a display device according to an embodiment of the present invention includes: a substrate; a driving chip mounted on the substrate; and a pad disposed on the substrate and electrically connected to the driving chip, wherein the pad includes a bottom layer electrically connected to the driving chip, and a sheet layer disposed on the bottom layer and electrically connected to the bottom layer, and wherein a lateral surface of the bottom layer is not covered by the sheet layer.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 24, 2015
    Assignees: SAMSUNG DISPLAY CO., LTD., KODI-S CO., LTD.
    Inventors: Kyu Tae Kim, Joong Young Ryu, Chang Hyun Ryu
  • Publication number: 20140104411
    Abstract: An apparatus to test a semiconductor package includes a vertical illuminator to supply vertical illumination in the same axial direction as a measurement target and a vertical image unit to capture a vertical image of the measurement target so that a testing apparatus may 2-dimensionally determine information on the shape, size, or position of a solder ball. An inclined illuminator may supply inclined illumination in a different axial direction from the measurement target, and an inclined image capture unit may capture a side image of the measurement target so that the testing apparatus may 3-dimensionally determine information on a state of contact of the solder ball with the ball land. The inclined image capture unit may include a color camera using color information, thereby markedly increasing test reliability and yield.
    Type: Application
    Filed: November 8, 2012
    Publication date: April 17, 2014
    Applicant: SAMSUNG Electronics Co., Ltd
    Inventors: Chang-Hyun RYU, Ssang-Gun LIM, Dong-Hae SON, Poom-Seong PARK
  • Publication number: 20140062499
    Abstract: A testing apparatus for a display device according to an embodiment of the present invention includes: a substrate; a driving chip mounted on the substrate; and a pad disposed on the substrate and electrically connected to the driving chip, wherein the pad includes a bottom layer electrically connected to the driving chip, and a sheet layer disposed on the bottom layer and electrically connected to the bottom layer, and wherein a lateral surface of the bottom layer is not covered by the sheet layer.
    Type: Application
    Filed: March 15, 2013
    Publication date: March 6, 2014
    Applicants: KODI-S CO., LTD., SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyu Tae KIM, Joong Young RYU, Chang Hyun RYU
  • Patent number: 8319961
    Abstract: An apparatus to test a semiconductor package includes a vertical illuminator to supply vertical illumination in the same axial direction as a measurement target and a vertical image unit to capture a vertical image of the measurement target so that a testing apparatus may 2-dimensionally determine information on the shape, size, or position of a solder ball. An inclined illuminator may supply inclined illumination in a different axial direction from the measurement target, and an inclined image capture unit may capture a side image of the measurement target so that the testing apparatus may 3-dimensionally determine information on a state of contact of the solder ball with the ball land. The inclined image capture unit may include a color camera using color information, thereby markedly increasing test reliability and yield.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: November 27, 2012
    Assignees: SAMSUNG Electronics Co., Ltd., INTEKPLUS Co., Ltd.
    Inventors: Chang-Hyun Ryu, Ssang-Gun Lim, Dong-Hae Son, Poom-Seong Park
  • Publication number: 20100141937
    Abstract: An apparatus to test a semiconductor package includes a vertical illuminator to supply vertical illumination in the same axial direction as a measurement target and a vertical image unit to capture a vertical image of the measurement target so that a testing apparatus may 2-dimensionally determine information on the shape, size, or position of a solder ball. An inclined illuminator may supply inclined illumination in a different axial direction from the measurement target, and an inclined image capture unit may capture a side image of the measurement target so that the testing apparatus may 3-dimensionally determine information on a state of contact of the solder ball with the ball land. The inclined image capture unit may include a color camera using color information, thereby markedly increasing test reliability and yield.
    Type: Application
    Filed: December 8, 2009
    Publication date: June 10, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Chang-Hyun Ryu, Ssang-Gun Lim, Dong-Hae Son, Poom-Seong Park
  • Patent number: 6591368
    Abstract: A method for controlling power of a computer system using a wake up local area network (LAN) signal and an apparatus therefor are provided. The method includes the steps of powering devices other than predetermined peripheral apparatuses sensible to power on/off, when the wake up LAN signal is sensed in the power-off state of the computer system, checking power on enable or disable in wake up LAN enable from the system setup state during booting of the computer, and powering on the predetermined peripheral apparatuses if a system is set to power on enable, and powering off the devices powered on in the step of checking power on enable or disable if not.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: July 8, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-hyun Ryu
  • Patent number: 6453414
    Abstract: A computer system with a PC card and a booting method of the same is described and which includes bootable configuration by loading a boot record from a nonvolatile memory of the PC card. If the PC card is installed in a personal computer memory card international association(PCMCIA) adapter, the computer system loads a boot record from the PC card to a memory and performs system booting, then. As a result, when a plurality of users use a computer, system environments required by the user are loaded from a PC card, thereby conveniently setting a system environment. Moreover, the boot record is loaded from the PC card, the system booting is performed to have a system security function.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: September 17, 2002
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-Hyun Ryu
  • Patent number: 6100666
    Abstract: A smart battery provides electrical power and reports remaining capacity of the battery. A disparity between the calculated remaining capacity and the actual capacity of the smart battery is calibrated through a maximum power consumption mode. Specifically, a maximum power consumption mode is set, the battery is discharged until a battery capacity learning level is reached, the battery capacity is determined, and the system is then set to a minimum power consumption mode. Power management function is disabled prior to the latter process, and enabled after the process is completed.
    Type: Grant
    Filed: June 15, 1999
    Date of Patent: August 8, 2000
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Chang-Hyun Ryu
  • Patent number: 6067625
    Abstract: A password recovery method to be used in a computer system including a BIOS ROM having a BIOS setup program and a CMOS memory for storing the BIOS setup information. The BIOS setup program provides a USER PASSWORD SETUP which allows users to set or change his or her own password. Further, the USER PASSWORD SETUP includes an input of at least one identification number before entering the first password. The identification number may include one of a users' resident registration number, system's registration number or serial number assigned to each computer by the manufacturer. If the user forgets or lose the password and incorrect passwords are repeatedly entered for a predetermined number of times, the BIOS program asks the user to enter the identification number. If the entered identification number is identical with the stored identification number, the program starts to encrypt the password stored in the CMOS memory.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: May 23, 2000
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Chang-Hyun Ryu
  • Patent number: 5978921
    Abstract: A portable computer system made up of a voltage level detecting portion for detecting the output voltage level of a battery; a switching portion connected between the battery and at least one peripheral device for turning on/off the peripheral device; a battery charging state determining portion for receiving a voltage level signal from the voltage level detecting portions, comparing it with a reference voltage level between the normal operating voltage level and the lower voltage level that is relatively lower than the normal operating voltage level, determining the charging state of the battery and outputting a control signal; and a control portion for controlling the turning on or off of the switching portion in response to the control signal, thereby controlling a hard disk drive to store current data at the reference voltage level.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: November 2, 1999
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-Hyun Ryu
  • Patent number: 5964878
    Abstract: A method for controlling operation of an optical disk drive in a computer having the optical disk drive, a hard disk drive and a power management controller. The power management controller generates a power saving control signal when the computer system is suspended in use for a predetermined time period. If the power saving control signal is generated, a central processing unit (CPU) determines whether the optical disk drive is in operation in order to block the power supplied to either all components of the computer system or the components of the computer system except for the optical disk drive. That is, if the optical disk drive is not in operation, power is blocked to all components of the computer system. If the optical disk drive is in operation, however, power is blocked to components of the computer system except the optical disk drive and its associated components.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: October 12, 1999
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-Hyun Ryu
  • Patent number: 5900026
    Abstract: A method and apparatus for setting a networked computer with a power saving on into a power saving mode in which power is selectively supplied to only those resources of the computer used in processing network interrupts.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: May 4, 1999
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Chang-Hyun Ryu
  • Patent number: 5898880
    Abstract: The present invention relates to a power saving apparatus for a hard disk drive in a battery powered computer and to a method of controlling the same in the battery powered computer. CPU of the power saving apparatus is configured to generate a request signal for receiving battery level data from a power control unit, to enable a disk cache to operate in a write back mode if the battery level is available for a predetermined time period, and to control the power control unit to produce a switch off signal after writing all data contained in the cache into the hard disk is completed in response to a power off system management interrupt signal from the power control unit. With this configuration, access to the hard disk drive is restricted and power consumption of hard disk drive is reduced without the loss of data in the cache when there is a sudden system power off.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: April 27, 1999
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Chang-Hyun Ryu