Patents by Inventor Jung-Hwan Choi

Jung-Hwan 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).

  • Memory system, memory module, and methods of operating the same
    Patent number: 9753651
    Abstract: A memory system includes a memory controller, a first memory module and second through k-th memory modules. The first memory module is directly coupled to the memory controller without any other memory modules communicatively coupled therebetween, through a first memory bus, and the first memory module exchanges first data with the memory controller. The second through k-th memory modules are coupled to the first memory module with a multi-drop connection through a second memory bus and the second through k-th memory modules exchange second data with the memory controller via the first memory module.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: September 5, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Jung-Hwan Choi
  • Server cluster and method for push notification service
    Patent number: 9736257
    Abstract: A server cluster and method for providing a push notification service are provided. The method includes searching for, by a management server cluster, a first push server corresponding to predetermined search criteria from among a plurality of push servers upon receiving a request to connect with a push server from a mobile terminal; providing, by the management server cluster, connection information regarding the found first push server to the mobile terminal; and delivering, by the first push server, upon generation of a notification event after connecting with the mobile terminal, event information corresponding to the push notification event to the connected mobile terminal.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: August 15, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ka-Ram Ko, Hee Seo, Jung-Hwan Choi, In-Gyu Kim
  • OPERATING METHOD OF INPUT/OUTPUT INTERFACE
    Publication number: 20170139848
    Abstract: A method of operating an input/output interface includes selecting one of a plurality of output driver circuits according to a mode selection signal, and outputting a data signal using the selected one of the plurality of output driver circuits. Another method of operating an includes generating a mode selection signal based on a received command signal, and controlling an on-die termination (ODT) circuit included in the input/output interface according to the mode selection signal. Another method of operating an includes generating a mode selection signal based on a received command signal, and controlling an ODT circuit included in the input/output interface according to the mode selection signal.
    Type: Application
    Filed: January 26, 2017
    Publication date: May 18, 2017
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: YOUNG CHUL CHO, Jung Bae Lee, Jung Hwan Choi
  • DATA OUTPUT CIRCUIT AND MEMORY DEVICE INCLUDING THE SAME
    Publication number: 20170140799
    Abstract: A memory device may include a data output circuit configured to multiplex a plurality of data signals read from a memory cell array, wherein the data output circuit includes a clock boosting circuit configured to receive a plurality of internal clock signals generated based on a first power voltage, and to generate a plurality of boosted clock signals by boosting the plurality of internal clock signals based on a second power voltage having a voltage level greater than that of the first power voltage, and a data output driver configured to multiplex and output the plurality of data signals synchronized with the boosted clock signals.
    Type: Application
    Filed: October 17, 2016
    Publication date: May 18, 2017
    Inventors: Chang-kyo LEE, Won-young LEE, Bo-bae SHIN, Jung-hwan CHOI, Yong-cheol BAE, Seok-hun HYUN, Min-su AHN
  • Method of operating memory device and methods of writing and reading data in memory device
    Patent number: 9589674
    Abstract: In a method of operating a memory device, a command and a first address from a memory controller are received. A read code word including a first set of data corresponding to the first address, a second set of data corresponding to a second address and a read parity data is read from a memory cell array of the memory device. Corrected data are generated by operating error checking and correction (ECC) using an ECC circuit based on the read cord word.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: March 7, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jong-Pil Son, Young-Soo Sohn, Uk-Song Kang, Chul-Woo Park, Jung-Hwan Choi, Won-Il Bae, Kyo-Min Sohn
  • Input/output interface
    Patent number: 9575923
    Abstract: A method of operating an input/output interface includes selecting one of a plurality of output driver circuits according to a mode selection signal, and outputting a data signal using the selected one of the plurality of output driver circuits. Another method of operating an includes generating a mode selection signal based on a received command signal, and controlling an on-die termination (ODT) circuit included in the input/output interface according to the mode selection signal. Another method of operating an includes generating a mode selection signal based on a received command signal, and controlling an ODT circuit included in the input/output interface according to the mode selection signal.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: February 21, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young Chul Cho, Jung Bae Lee, Jung Hwan Choi
  • Memory modules with reduced rank loading and memory systems including same
    Patent number: 9542343
    Abstract: A memory module includes memory devices arranged in ranks and columns and designated in first and second groupings, the first grouping includes memory devices arranged in only a first rank nearest a memory controller and directly connected to the memory controller, the memory devices in the second grouping are indirectly connected to the memory controller via a corresponding memory device in the first grouping arranged in a same column, and each memory device selectively provides either self-data retrieved from a constituent memory core or other-data retrieved from a memory core of another memory device during the read operation.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: January 10, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jeong-Kyoum Kim, In-Dal Song, Jung-Hwan Choi
  • Multiple-output DC/DC converter and power supply having the same
    Patent number: 9490708
    Abstract: Disclosed are a multiple-output DC/DC converter and a power supply having the same. The multiple-output DC/DC converter includes a converter including a transformer and a first surge absorbing module, wherein the transformer includes a first switch provided to a primary side and outputs a first voltage to a secondary side, and the first surge absorbing module is connected to the primary side of the transformer and absorbs a surge voltage formed at the first switch by a leakage inductance of the transformer; and a first energy converting module to receive output energy supplied from the first surge absorbing module and output a second voltage.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: November 8, 2016
    Assignee: LG Innotek Co., Ltd.
    Inventors: Chunfeng Jin, Dong Young Huh, Jae Sam Lee, Hyun Woo Lee, Jung Hwan Choi
  • Semiconductor device capable of rescuing defective characteristics occurring after packaging
    Patent number: 9466393
    Abstract: A memory device capable of rescuing defective characteristics that occur after packaging includes a memory cell array including a plurality of memory cells and an antifuse circuit unit including at least one antifuse. The antifuse circuit unit stores a defective cell address of the memory cell array in the at least one antifuse and reads the defective cell address to an external source. The antifuse circuit unit stores a defective characteristic code in the at least one antifuse, wherein the defective characteristic code is related to at least one of a timing parameter spec., a refresh spec., an input/output (I/O) trigger voltage spec., and a data training spec. of the memory device, and outputs the defective characteristic code to an external source.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: October 11, 2016
    Inventors: Jeong-kyoum Kim, Seok-hun Hyun, Jung-hwan Choi, Seong-jin Jang
  • SERVER CLUSTER AND METHOD FOR PUSH NOTIFICATION SERVICE
    Publication number: 20160234327
    Abstract: A server cluster and method for providing a push notification service are provided. The method includes searching for, by a management server cluster, a first push server corresponding to predetermined search criteria from among a plurality of push servers upon receiving a request to connect with a push server from a mobile terminal; providing, by the management server cluster, connection information regarding the found first push server to the mobile terminal; and delivering, by the first push server, upon generation of a notification event after connecting with the mobile terminal, event information corresponding to the push notification event to the connected mobile terminal.
    Type: Application
    Filed: April 18, 2016
    Publication date: August 11, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ka-Ram KO, Hee SEO, Jung-Hwan CHOI, In-Gyu KIM
  • APPLICATION EXECUTION METHOD BY DISPLAY DEVICE AND DISPLAY DEVICE THEREOF
    Publication number: 20160202852
    Abstract: Disclosed is a method for executing at least one application by a display device having a touch screen. An application execution method according to the present invention may include the steps of: displaying a window for executing an application in each of a plurality of areas arranged on a touch screen; displaying a button on at least one boundary line dividing the plurality of areas; receiving an input for selecting the button; and displaying, in a predetermined area, on the basis of the received input, a list of at least one application executed in the predetermined area among the plurality of areas.
    Type: Application
    Filed: August 14, 2014
    Publication date: July 14, 2016
    Inventors: Dae-wook PARK, Young-jin KIM, Jae-yeol LEE, Tae-soo KIM, Jung-hwan CHOI, Kang-tae KIM
  • DISPLAY DEVICE AND METHOD OF DISPLAYING SCREEN ON SAID DISPLAY DEVICE
    Publication number: 20160196057
    Abstract: A method of displaying for allowing a plurality of application windows to be easily controlled and a display device therefor are provided. A method of displaying a screen on a display device includes displaying a button on a touch screen; splitting the touch screen into a plurality of regions based on the position at which the button is displayed, receiving a touch input to move a displayed button, obtaining a slope value of a line connecting a start point of the touch input to an end point thereof, selecting a region corresponding to the slope value from among the plurality of regions split, and moving the button to a certain position included in a selected region.
    Type: Application
    Filed: August 13, 2014
    Publication date: July 7, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-hwan CHOI, Young-jin KIM,, Tae-soo KIM, Kang-tae KIM, Tae-hyung KIM
  • SEMICONDUCTOR DEVICE CAPABLE OF RESCUING DEFECTIVE CHARACTERISTICS OCCURRING AFTER PACKAGING
    Publication number: 20160133335
    Abstract: A memory device capable of rescuing defective characteristics that occur after packaging includes a memory cell array including a plurality of memory cells and an antifuse circuit unit including at least one antifuse. The antifuse circuit unit stores a defective cell address of the memory cell array in the at least one antifuse and reads the defective cell address to an external source. The antifuse circuit unit stores a defective characteristic code in the at least one antifuse, wherein the defective characteristic code is related to at least one of a timing parameter spec., a refresh spec., an input/output (I/O) trigger voltage spec., and a data training spec. of the memory device, and outputs the defective characteristic code to an external source.
    Type: Application
    Filed: January 15, 2016
    Publication date: May 12, 2016
    Inventors: Jeong-kyoum Kim, Seok-hun Hyun, Jung-hwan Choi, Seong-jin Jang
  • Apparatus and method for transmitting push notification message
    Patent number: 9338118
    Abstract: Provided is an apparatus and method for transmitting a push notification message. To this end, connection is performed with a mobile terminal, and if a push notification message is received from a push notification service providing server, the received push notification message is transmitted to the mobile terminal, and when disconnected from the mobile terminal, a push notification message received after the disconnection is stored, such that transmission of the push notification message can be guaranteed.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: May 10, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-Hwan Choi, Hee Seo, Ka-Ram Ko, In-Gyu Kim
  • DISPLAY DEVICE
    Publication number: 20160125840
    Abstract: Disclosed is a display device. The display device may use one transmission line to perform bidirectional data transmission between a timing controller and a source driver. Furthermore, the display device may control the timing controller to transmit a Tx signal to the source driver and control the source driver to transmit correction data, through one transmission line.
    Type: Application
    Filed: November 4, 2015
    Publication date: May 5, 2016
    Inventors: Kwang Il OH, Jung Hwan CHOI, Yun Tack HAN, Hyun Kyu JEON
  • MEMORY SYSTEM, MEMORY MODULE, AND METHODS OF OPERATING THE SAME
    Publication number: 20160117101
    Abstract: A memory system includes a memory controller, a first memory module and second through k-th memory modules. The first memory module is directly coupled to the memory controller without any other memory modules communicatively coupled therebetween, through a first memory bus, and the first memory module exchanges first data with the memory controller. The second through k-th memory modules are coupled to the first memory module with a multi-drop connection through a second memory bus and the second through k-th memory modules exchange second data with the memory controller via the first memory module.
    Type: Application
    Filed: July 20, 2015
    Publication date: April 28, 2016
    Inventor: Jung-Hwan CHOI
  • Optical transmission converter, memory system comprising same, and related method of operation
    Patent number: 9312963
    Abstract: An optical transmission converter comprises a wavelength selector configured to output a reception wavelength selection signal and a transmission wavelength selection signal in response to a wavelength control signal, an opto-electrical converter configured to convert a selection optical signal into a reception electrical signal based on a reception optical signal from a host device and the reception wavelength selection signal, and an electro-optical converter configured to convert a transmission electrical signal into a transmission optical signal based on the transmission wavelength selection signal and the transmission electrical signal.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: April 12, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jeong-Kyoum Kim, Seok-Hun Hyun, In-Dal Song, Seong-Jin Jang, Jung-Hwan Choi
  • SERVER CLUSTER AND METHOD FOR PUSH NOTIFICATION SERVICE
    Publication number: 20160088107
    Abstract: A server cluster and method for providing a push notification service are provided. The method includes searching for, by a management server cluster, a first push server corresponding to predetermined search criteria from among a plurality of push servers upon receiving a request to connect with a push server from a mobile terminal; providing, by the management server cluster, connection information regarding the found first push server to the mobile terminal; and delivering, by the first push server, upon generation of a notification event after connecting with the mobile terminal, event information corresponding to the push notification event to the connected mobile terminal.
    Type: Application
    Filed: December 7, 2015
    Publication date: March 24, 2016
    Inventors: Ka-Ram KO, Hee SEO, Jung-Hwan CHOI, ln-Gyu KIM
  • Semiconductor device capable of rescuing defective characteristics occurring after packaging
    Patent number: 9269457
    Abstract: A memory device capable of rescuing defective characteristics that occur after packaging includes a memory cell array including a plurality of memory cells and an antifuse circuit unit including at least one antifuse. The antifuse circuit unit stores a defective cell address of the memory cell array in the at least one antifuse and reads the defective cell address to an external source. The antifuse circuit unit stores a defective characteristic code in the at least one antifuse, wherein the defective characteristic code is related to at least one of a timing parameter spec., a refresh spec., an input/output (I/O) trigger voltage spec., and a data training spec. of the memory device, and outputs the defective characteristic code to an external source.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: February 23, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jeong-kyoum Kim, Seok-hun Hyun, Jung-hwan Choi, Seong-jin Jang
  • Clock synchronization circuit and semiconductor memory device including clock synchronization circuit
    Patent number: 9245605
    Abstract: A clock synchronization circuit includes a delay-locked loop (DLL) and a delay-locked control unit. The DLL is configured to generate an output clock signal by delaying an input clock signal by a delay time, and to execute a delay-locking operation in which the delay time is adjusted to a locked state according to a comparison between the output clock signal and the input clock signal. The delay-locked control unit configured to detect the locked state of the DLL, and to control the DLL based on the determined locked state.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: January 26, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seong-Hwan Jeon, Yang-Ki Kim, Seok-Hun Hyun, Jung-Hwan Choi