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).

  • Publication number: 20240392407
    Abstract: The present invention relates to: a high-strength cold-rolled steel sheet having excellent quality and low mechanical property deviation; and a manufacturing method therefor. More particularly, the present invention relates to: a high-strength cold-rolled steel sheet that can be suitably used for automotive parts by ensuring high strength and elongation with little surface defects and low mechanical property deviation; and a manufacturing method therefor.
    Type: Application
    Filed: September 20, 2022
    Publication date: November 28, 2024
    Applicant: POSCO CO., LTD
    Inventors: Sung-Il KIM, Joo-Hyun RYU, Chang-Hyo SEO
  • Publication number: 20240397676
    Abstract: A temperature management system for a room with a charge discharge device installed is provided, and the temperature management system includes one or more charge discharge devices installed in a room, performing charging or discharging of a battery, and including an external air conditioning module adjusting air temperature in the room, and a managing server controlling operation of the external air conditioning module of each of the charge discharge devices to adjust temperature in the room. When the temperature of the room with a charge discharge device installed increases due to heat generated by charging or discharging of the battery, the charge discharge devices may cool the air of the room, and a load to an air conditioner installed in a building can be reduced.
    Type: Application
    Filed: February 8, 2024
    Publication date: November 28, 2024
    Inventors: Sin Young MOON, Chang Mook HWANG, Gyeong Min RYU, Mi So RHO, Seung Hyun YOOK, Ji A LEE
  • Publication number: 20240384366
    Abstract: Provided is a high-strength cold-rolled steel sheet having excellent surface quality and low material variation, and a method for manufacturing same. More specifically, the present invention pertains to: a high-strength cold-rolled steel sheet which has few surface defects and little material deviation, as well as high strength and elongation, and is thus suitable for use in automotive parts; and a method for manufacturing same.
    Type: Application
    Filed: September 20, 2022
    Publication date: November 21, 2024
    Inventors: Chang-Hyo SEO, Sung-Il KIM, Joo-Hyun RYU
  • Patent number: 12086437
    Abstract: The present technology relates to an electronic device. According to the present technology, a memory controller may include an attribute determiner configured to determine an attribute of each of a plurality of pages included in a first external device to indicate one of a hot page and a cold page, based on an access interval which is an interval from a time at which data is stored in each of the pages to a time at which access to the data is requested, a page analyzer configured to determine a ratio of hot pages having a hot page attribute to the plurality of pages, and a memory allocator configured to control one of the first external device and the second external device to store therein externally provided data based on the ratio of hot pages.
    Type: Grant
    Filed: October 4, 2022
    Date of Patent: September 10, 2024
    Assignee: SK hynix Inc.
    Inventors: Jun Hee Ryu, Chang Hyun Park, Kwang Jin Ko, Young Pyo Joo
  • Publication number: 20240254991
    Abstract: A compressor and a method for controlling the compressor detects the state of the suction refrigerant, thereby preventing the damage of the compressor and enabling stable operation. The compressor includes a compression unit equipped with a compression means for compressing a refrigerant, a motor unit coupled to the compression unit and compresses a suction refrigerant sucked through a suction port, an inverter unit with a detection unit for detecting a state of the suction refrigerant sucked through the suction port, and a control unit which controls the compression unit. The control unit controls by comparing a low flow condition which is set on the basis of a state in which the compression unit operates under an operating condition of a low refrigerant amount of the suction refrigerant and an actual flow condition of the suction refrigerant sucked into the motor unit when the compression unit is actually operated.
    Type: Application
    Filed: May 19, 2022
    Publication date: August 1, 2024
    Inventors: Gu Hyun Ryu, Chi Myeong Moon, Kweon Soo Lim, Chang Eon Park, Hyun Seong Ahn
  • Publication number: 20240247349
    Abstract: Provided is a high-strength cold-rolled steel sheet having excellent surface quality and low mechanical property deviation; and a manufacturing method thereof and, more particularly, to: a high-strength cold-rolled steel sheet that can be suitably used for automotive parts by ensuring high strength and elongation with little surface defects and low mechanical property deviation; and a manufacturing method thereof.
    Type: Application
    Filed: September 20, 2022
    Publication date: July 25, 2024
    Inventors: Joo-Hyun RYU, Sung-Il KIM, Chang-Hyo SEO
  • Patent number: 12040626
    Abstract: A wireless power transmitting device according to an embodiment may include a power transmission circuit and a processor. The processor may be configured to control the power transmission circuit to wirelessly transmit power to a first area around the wireless power transmitting device, perform a predetermined first operation when an obstacle is detected in a second area around the first area, and perform a predetermined second operation when it is detected that the obstacle has entered the first area.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: July 16, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-Seok Park, Young-Ho Ryu, Chang-hyun Kim, Myung-ho Kim, Woong-Il Choi
  • 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