Patents by Inventor Wook Han

Wook Han 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).

  • ORGANIC LIGHT EMITTING DISPLAY DEVICE
    Publication number: 20200411787
    Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.
    Type: Application
    Filed: September 9, 2020
    Publication date: December 31, 2020
    Applicant: LG Display Co., Ltd.
    Inventors: Sung Hoon PIEH, Chang Wook HAN, Hong Seok CHOI, Ki-Woog SONG, So Yeon AHN, Seung Hyun KIM
  • Blocking communication between rogue devices on wireless local access networks (WLANS)
    Patent number: 10880749
    Abstract: Techniques which prevent rogue devices from continued access to a wireless communication system. A control element directs access points as to which mobile stations to service. Each access point maintains a record of the mobile stations it is servicing. At the direction of the control element, one or more access points send ACK (acknowledgement) messages when hearing messages from a rogue device. When the rogue device sends a message, it expects an ACK message in response, but those additional ACK messages interfere with the responsive ACK message, causing the rogue device to never hear the responsive ACK message. The rogue device assumes its message was not received, so it retries sending of that message. When the rogue device retries sending of its message, the responsive ACK message is similarly interfered with, until the rogue device concludes that its connection has been lost.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: December 29, 2020
    Assignee: Fortinet, Inc.
    Inventors: Sung-Wook Han, Mohan Ram
  • High strength welding joint having excellent impact toughness at very low temperature, and flux-cored arc welding wire therefor
    Patent number: 10864605
    Abstract: A high strength welding joint having excellent toughness at low temperature obtained by welding a cryogenic high-strength high-Mn steel, comprising 0.1-0.61 wt % of C, 0.23-1.0 wt % of Si, 14-35 wt % of Mn, 6 wt % or less of Cr, 1.45-3.5 wt % of Mo, 0.02 wt % or less of S, 0.02 wt % or less of P, 0.001-0.01 wt % of B, 0.001-0.2 wt % of Ti, 0.001-0.3 wt % of N, and balance of Fe and inevitable impurities; and a flux-cored arc welding wire comprising 0.15-0.8 wt % of C, 0.2-1.2 wt % of Si, 15-34 wt % of Mn, 6 wt % or less of Cr, 1.5-4 wt % of Mo, 0.02 wt % or less of S, 0.02 wt % or less of P, 0.01 wt % or less of B, 0.1-0.5 wt % of Ti, 0.001-0.3 wt % of N, 4-15 wt % of TiO2, 0.01-9 wt % of at least one of SiO2, ZrO2 and Al2O3, 0.5-1.7 wt % of at least one of alkali elements including K, Na, and Li, 0.2-1.5 wt % of at least one of F and Ca, and balance of Fe and inevitable impurities.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: December 15, 2020
    Assignee: POSCO
    Inventors: Bong-Keun Lee, Sang-Chul Lee, Il-Wook Han, Jeong-Kil Kim
  • Organic light emitting display device
    Patent number: 10818862
    Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: October 27, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Sung Hoon Pieh, Chang Wook Han, Hong Seok Choi, Ki-Woog Song, So Yeon Ahn, Seung Hyun Kim
  • Crystal oscillator and reference clock generator including same
    Patent number: 10819280
    Abstract: A crystal oscillator including a feedback circuit, and a reference clock generating circuit including the crystal oscillator. The crystal oscillator is configured to generate an oscillating signal based on a natural frequency of a crystal. The crystal oscillator may include: a current generating circuit connected to a first node having a first voltage and a second node having a second voltage, and configured to output a first current to the second node; a feedback circuit connected to the generating circuit via the first and second nodes and configured to adjust a level of the second voltage by controlling a level of the first voltage; and a crystal circuit connected to the second node and configured to generate the oscillating signal based on the second voltage.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: October 27, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-hyuk Jang, Shin-woong Kim, Young-min Kim, Jae-young Kim, Chul-ho Kim, Sang-wook Han
  • Semiconductor devices including command priority policy management and related systems
    Patent number: 10817445
    Abstract: Provided is a semiconductor device and a semiconductor system. A semiconductor device can include a command priority policy manager circuit which generates command priority policy information including a command priority compliance policy for a command directed to a device. A host interface circuit, can be coupled to the command priority policy manager circuit to receive the command priority policy information from the command priority policy manager circuit, where the host interface circuit operable to transmit the command priority policy information via an electrical interface to the device.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: October 27, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-Min Kim, Jeong-Woo Park, Wook Han Jeong, Jin Hwan Choi
  • COOLER FOR DISPLAY, AND DISPLAY DEVICE HAVING SAME
    Publication number: 20200337185
    Abstract: The present disclosure relates to a cooler and to a display device having the same, where a heat-exchanger of the cooler is arranged on a side surface of a display unit in order to simplify the structure and to make a slimmer display device. The cooler includes a closed air circulation pathway circulating between the front, rear and sides of the display unit; an open air flow pathway that flows in the length direction of the side of the display unit; and a cooling module that is installed on the side of the display along the length direction of the display, and that includes the heat-exchanger, where the closed air circulation path and the open air flow part are adjacent, thereby causing heat-exchange.
    Type: Application
    Filed: December 16, 2016
    Publication date: October 22, 2020
    Inventors: Ji Won CHOI, Se Hyeon KIM, Ju Hyok KIM, Han Choon LEE, Sung Wook HAN
  • LED LIGHTING APPARATUS CAPABLE OF COLOR TEMPERATURE CONTROL
    Publication number: 20200337129
    Abstract: An LED lighting apparatus capable of color temperature control includes a color temperature controller to receive a color temperature selection signal and output first and second control signals; a LED driver connected a plurality of LED groups; and a LED selection circuit including a first switch connected to a first node to which a rectified voltage is applied and receiving the first control signal, a first LED group selectively connected to the first node by the first switch, a second LED group connected in scales with the first LED group, a third LED group selectively connected to the first node by the first switch, a fourth LED group connected in series with the third LED group, and a second switch for selectively connecting the output terminal of the second LED group or the fourth LED group to the LED driver by receiving the second control signal.
    Type: Application
    Filed: June 2, 2020
    Publication date: October 22, 2020
    Inventors: Keith HOPWOOD, Sung Ho JIN, Hyung Jin LEE, Sang Wook HAN
  • Display panel and method of manufacturing the same
    Patent number: 10802368
    Abstract: A display panel including: a base substrate having first and second regions; a color filter layer having a first color layer, and a second color layer disposed in the second region and on the first color layer; a first pixel electrode disposed on the color filter layer and in the first region; and a second pixel electrode disposed in the first region and between the first pixel electrode and the second region. The first pixel electrode includes first branches spaced apart at a first pitch, and second branches spaced apart at a second pitch, the second pixel electrode includes third branches spaced apart at a third pitch and extended in the same direction as the first branches, and fourth branches spaced apart at a fourth pitch and extended in the same direction as the second branches, and the first and third pitches are different from each other.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: October 13, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jinsu Lee, Seungmin Lee, Kun-wook Han, Basrur Veidhes
  • LED lighting apparatus capable of color temperature control
    Patent number: 10791597
    Abstract: An LED lighting apparatus capable of color temperature control includes a color temperature controller to receive a color temperature selection signal and output first and second control signals; a LED driver connected a plurality of LED groups; and a LED selection circuit including a first switch connected to a first node to which a rectified voltage is applied and receiving the first control signal, a first LED group selectively connected to the first node by the first switch, a second LED group connected in series with the first LED group, a third LED group selectively connected to the first node by the first switch, a fourth LED group connected in series with the third LED group, and a second switch for selectively connecting the output terminal of the second LED group or the fourth LED group to the LED driver by receiving the second control signal.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: September 29, 2020
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Keith Hopwood, Sung Ho Jin, Hyung Jin Lee, Sang Wook Han
  • QUANTUM SIGNATURE METHOD AND QUANTUM SECRET SHARING METHOD USING QUANTUM TRAPDOOR ONE-WAY FUNCTION
    Publication number: 20200287714
    Abstract: This specification discloses a quantum public-key cryptosystem. The quantum public-key cryptosystem may use two rotation operators R{circumflex over (n)}(?) and R{circumflex over (m)}(?) satisfying a cyclic evolution. The two rotation operators R{circumflex over (n)}(?) and R{circumflex over (m)}(?) do not have a commutation relation or an anti-commutation relation with each other. The commutation relation or the anti-commutation relation is established when either of the following conditions is satisfied: ?=2i?, ?=2j?, or {circumflex over (n)}·{circumflex over (m)}=1 (i, j=integer), and ?=(2k+1)?, ?=(2l+1)?, or {circumflex over (n)}·{circumflex over (m)}=0 (k, l=integer).
    Type: Application
    Filed: January 10, 2020
    Publication date: September 10, 2020
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Sang Wook HAN, Sung Wook MOON, Yong Su KIM, Sang Yun LEE, Young Wook CHO, Min Sung KANG, Ji Woong CHOI
  • Lighting apparatus including light-emitting diodes
    Patent number: 10757781
    Abstract: A lighting apparatus including an LED circuit including a plurality of serially connected stages configured to receive a modulated rectified voltage, each of the stages including a first path including a first resistor and a first LED connected in series, and a second path connected to the first path in parallel and including a second LED configured to emit light having a color temperature different from that emitted from the first LED, and a driving current controller configured to adjust an intensity of light output from the LED circuit by adjusting currents applied to driving nodes connected to the stages, depending on a dimming signal associated with a dimming level of the rectified voltage, in which a threshold voltage of the first LED is lower than that of the second LED.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: August 25, 2020
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Keith Hopwood, Hyung Jin Lee, Sung Ho Jin, Sang Wook Han, In Seok Baek
  • COMPOSITE THERMAL INSULATION SHEET INCLUDING AEROGEL
    Publication number: 20200215791
    Abstract: Provided is a composite thermal insulation sheet including an aerogel and a method for manufacturing method the same. The methods yield an ultra-thin aerogel composite sheet having characteristics of low dust, high strength and high thermal insulation, thereby having an increased applicability thereof to an electronic device.
    Type: Application
    Filed: August 21, 2018
    Publication date: July 9, 2020
    Inventors: Kyoung Shil OH, Je Kyun LEE, Byoung Wook HAN, Yong Seog JEON, Sang Woo PARK, Joong Nyon KIM
  • PHASE LOCKED LOOP CIRCUITS, CLOCK SIGNAL GENERATORS COMPRISING DIGITAL-TO-TIME CONVERT CIRCUITS, OPERATING METHODS THEREOF AND WIRELESS COMMUNICATION DEVICES
    Publication number: 20200218203
    Abstract: Provided is clock signal generator configured to generate a target output clock signal based on a reference clock signal, the clock signal generator includes a digital-to-time converter (DTC) configured to delay a reference clock signal based on an input code to generate a delay clock signal, and output the delay clock signal, a DTC controller configured to determine an initial gain value of the DTC based on a result of comparing at least one delay amount of the DTC with a period of a previously generated output clock signal, and generate the input code based on the initial gain value, and a phase locked loop configured to generate the target output clock signal based on the delay clock signal and a division clock signal of the previously generated output clock signal, the target output clock signal being locked to the delay clock signal.
    Type: Application
    Filed: March 13, 2020
    Publication date: July 9, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Shin-woong Kim, Jae-young Kim, Chul-ho Kim, Jae-hyuk Jang, Sang-wook Han
  • METHOD AND SYSTEM FOR BUILDING USER CONFIDENCE
    Publication number: 20200204516
    Abstract: Provided is a method and system for building a user confidence. A user confidence building method of a computer apparatus including at least one processor may include storing a confidence assigned to each of users; monitoring an activity of each of the users in a service; adjusting a confidence of a first user based on an incoming edge of the first user that is formed by an activity of a second user for the first user; and propagating the adjusted confidence of the first user based on an outgoing edge of the first user in response to adjusting the confidence of the first user.
    Type: Application
    Filed: December 6, 2019
    Publication date: June 25, 2020
    Applicant: LINE Plus Corporation
    Inventors: Youngsub PARK, Su Ahn LEE, JaeYun JUNG, Seung Wook HAN, Hee Jong LEE
  • ORGANIC LIGHT EMITTING DISPLAY DEVICE
    Publication number: 20200168828
    Abstract: An organic light emitting display device comprises two emission portions between first and second electrodes, wherein at least one among the two emission portions includes two emitting layers, whereby efficiency and a color reproduction ratio may be improved.
    Type: Application
    Filed: January 29, 2020
    Publication date: May 28, 2020
    Applicant: LG Display Co., Ltd.
    Inventors: Sung Hoon PIEH, Chang Wook HAN, Hong Seok CHOI, Ki-Woog SONG, So Yeon AHN, Seung Hyun KIM
  • Steering connection requests for an access point to a best-serving access point
    Patent number: 10652905
    Abstract: Network devices are steered to preferred access points using a probability function. A probe request for connection is received from a network device. The probe request can be from a network device attempting to use a wireless network (e.g., a IEEE 802.11-type network or other suitable type of network). A probability function that defines a likelihood of granting the network device a connection is used to determine whether to accept or deny the response. The probe response is then sent to the network device.
    Type: Grant
    Filed: May 28, 2018
    Date of Patent: May 12, 2020
    Assignee: Fortinet, Inc.
    Inventors: Sung-Wook Han, Mohan Ram
  • Display device and method for operating in a plurality of modes and displaying contents corresponding to the modes
    Patent number: 10643571
    Abstract: A display device and method are provided. The display device includes a display, a first sensor, and a processor. The first sensor senses movement. The processor is operatively connected with the display, and the first sensor, and operates in one of a first mode and a second mode, the first mode being a mode in which a dynamic image is displayed in the display and the second mode being a mode in which a static image is displayed in the display. In response to a movement of a user being sensed by the first sensor, in the second mode within a first critical time, the processor controls the display to display the static image.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: May 5, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Se Jung Whang, Jee Soo Kim, Kang Il Chung, Dong Wook Han, Young Kwang Seo, Eun Seok Choi, Jin Hyuk Hong
  • METHOD OF OPERATING STORAGE DEVICE, STORAGE DEVICE PERFORMING THE SAME AND METHOD OF OPERATING STORAGE SYSTEM USING THE SAME
    Publication number: 20200133571
    Abstract: A method of operating a storage device includes receiving, at the storage device, a meta information transfer command based on a data read request. The meta information transfer command is received from a host device. The method further includes receiving, at the storage device, a data read command corresponding to the data read request and the meta information transfer command. The data read command is received from the host device. The method further includes receiving, at the storage device, a plurality of meta data corresponding to the data read request and the meta information transfer command. The plurality of meta data is received from the host device. The method further includes performing a data read operation, at the storage device, based on the data read command and the plurality of meta data.
    Type: Application
    Filed: May 20, 2019
    Publication date: April 30, 2020
    Inventors: Dong-Woo Kim, Dong-Min Kim, Song-Ho Yoon, Wook-Han Jeong
  • IMAGE FORMING APPARATUS AND METHOD FOR IMAGE FORMING
    Publication number: 20200117118
    Abstract: An image forming apparatus is provided. The image forming apparatus includes a sensor to detect a toner concentration, and a processor to control a rendering of image-forming data to form an image on an image forming medium, according to a level of toner concentration saving that is adjusted based on the detected toner concentration.
    Type: Application
    Filed: December 11, 2019
    Publication date: April 16, 2020
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Kyeong-man KIM, Hyun-soo OH, Seong-wook HAN, Yoon-tae LEE