Patents by Inventor In Keun Woo

In Keun Woo 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: 20220301505
    Abstract: A display device includes a first transistor configured to control a driving current flowing from a first electrode to a second electrode according to a voltage applied to a gate electrode of the first transistor, and a second transistor between the second electrode of the first transistor and the gate electrode of the first transistor, the second transistor including a first sub-transistor and a second sub-transistor. A same scan signal is to be transmitted to a gate electrode of the first sub-transistor and a gate electrode of the second sub-transistor. A gate insulating layer of the first sub-transistor includes a first thickness. A gate insulating layer of the second sub-transistor includes a second thickness smaller than the first thickness.
    Type: Application
    Filed: November 15, 2021
    Publication date: September 22, 2022
    Inventor: Keun Woo KIM
  • Patent number: 11450722
    Abstract: A display device includes: a first semiconductor layer on a first buffer layer, and including a first active layer; a first gate insulating layer on the first semiconductor layer, and covering the first active layer; a first conductive layer on the first gate insulating layer, and including a first gate electrode; a second conductive layer on the first conductive layer, and including a first source/drain electrode; a first interlayer insulating layer on the first conductive layer; a second semiconductor layer on the first interlayer insulating layer, and including a second active layer; a second gate insulating layer on the second semiconductor layer, and covering the second active layer; and a third conductive layer on the second gate insulating layer, and including a second gate electrode and a second source/drain electrode. The first gate insulating layer and the second gate insulating layer include different insulating materials from each other.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: September 20, 2022
    Assignee: Samsung Display Co., Lid.
    Inventors: Doo Na Kim, Keun Woo Kim, Tae Wook Kang, Do Kyeong Lee, Yong Su Lee, Jae Hwan Chu, Kwang Hyun Kim, Yeoung Keol Woo, Yung Bin Chung
  • Patent number: 11450133
    Abstract: An ultrasonic sensing device includes: a sensing layer between a driving electrode and a sensing electrode, a double-gated first transistor connected to a selection line and the sensing electrode, and may further include a sensed voltage storing capacitor having an electrode on the same layers as the first transistor. The configuration as a double gated transistor of a pixel sensor and the placement of one of the capacitor electrodes on the same layer can each reduce the size of the pixel sensor. The ultrasonic sensing device may be utilized as a proximity sensor or a fingerprint recognition sensor.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: September 20, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Keun Woo Kim, Doo Na Kim, Ji Yeong Shin, Yong Su Lee, Jae Hwan Chu, Ki Seok Choi
  • Patent number: 11437455
    Abstract: A display device includes a pixel disposed in a display region. The pixel includes a light-emitting element connected between a first power source and a second power source; a first transistor connected between the first power source and the light-emitting element to control a driving current flowing in the light-emitting element in response to a voltage of a first node; and at least one switching transistor to transmit a data signal or a voltage of an initialization power source to the first node. The switching transistor includes a first channel region, a first conductive region and a second conductive region which are respectively disposed at opposite sides of the first channel region, and a first wide band-gap region disposed between the first channel region and the second conductive region.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: September 6, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Keun Woo Kim, Hye Na Kwak, Doo Na Kim, Sang Sub Kim, Thanh Tien Nguyen, Yong Su Lee, Jae Hwan Chu
  • Publication number: 20220271112
    Abstract: A display device is provided. The display device includes substrate, a lower conductive layer disposed on the substrate, and including a first lower conductive pattern and a second lower conductive pattern electrically isolated from each other, a first semiconductor layer including a first channel region, and a first source disposed on one side of the first channel region and a first drain region disposed on the other side of the first channel region. The first lower conductive pattern overlaps the first channel region and the first source region, and the second lower conductive pattern overlaps the first channel region and the first drain region in a plan view, and different voltages are applied to the first lower conductive pattern and the second lower conductive pattern.
    Type: Application
    Filed: September 24, 2021
    Publication date: August 25, 2022
    Inventor: Keun Woo KIM
  • Patent number: 11410602
    Abstract: A display device includes a driving circuit that drives a pixel, and a display region including the pixel. The pixel includes a light emitting element electrically connected between a first power source and a second power source, a first transistor electrically connected between the first power source and the light emitting element to control a driving current, the first transistor including a first gate electrode electrically connected to a first node, and a second gate electrode electrically connected to a bias control line, and a switching transistor electrically connected between a data line and the first node, the switching transistor including a gate electrode electrically connected to a scan line. The driving circuit varies a control signal provided to the bias control line in a second period based on a first data signal provided to the data line during a first period.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: August 9, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Keun Woo Kim, Hye Na Kwak, Doo Na Kim, Han Bit Kim, Yong Su Lee
  • Publication number: 20220223159
    Abstract: An encoding/decoding apparatus and method for controlling a channel signal is disclosed, wherein the encoding apparatus may include an encoder to encode an object signal, a channel signal, and rendering information for the channel signal, and a bit stream generator to generate, as a bit stream, the encoded object signal, the encoded channel signal, and the encoded rendering information for the channel signal.
    Type: Application
    Filed: March 28, 2022
    Publication date: July 14, 2022
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jeong Il SEO, Seung Kwon BEACK, Dae Young JANG, Kyeong Ok KANG, Tae Jin PARK, Yong Ju LEE, Keun Woo CHOI, Jin Woong KIM
  • Patent number: 11361540
    Abstract: A method and apparatus for predicting an object of interest of a user receives an input image of a visible region of a user and gaze information including a gaze sequence of the user, generates weight filters for a per-frame segmentation image by analyzing a frame of the input image for input characteristics of the per-frame segmentation image and the gaze information, and predicts an object of interest of the user by integrating the weight filters and applies the integrated weight filter to the per-frame segmentation image.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: June 14, 2022
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Seungin Park, Hyong Euk Lee, Sung Geun Ahn, Gee Hyuk Lee, Dae Hwa Kim, Keun Woo Park
  • Publication number: 20220165830
    Abstract: An embodiment of a display device includes a display panel having a flexible characteristic and a rear passivation layer disposed on a rear surface of the display panel and including an opening, wherein a pixel is formed in an area of the display panel corresponding to the opening. The display panel includes: a flexible substrate including a polyimide layer and a barrier layer disposed on the polyimide layer; a driving transistor and a fifth transistor disposed on the substrate and including a polycrystalline semiconductor layer; a light emitting diode receiving an output current of the driving transistor; and a bottom metal layer disposed between the polyimide layer and the polycrystalline semiconductor layer in a cross-sectional view and disposed around a channel of the driving transistor in a plan view.
    Type: Application
    Filed: July 15, 2021
    Publication date: May 26, 2022
    Inventor: Keun Woo KIM
  • Publication number: 20220165824
    Abstract: An embodiment of a display device includes a flexible substrate including a polyimide layer and a barrier layer disposed on the polyimide layer. A driving transistor and a second transistor are disposed on the flexible substrate and include a polycrystalline semiconductor layer. A third transistor is disposed on the flexible substrate and includes an oxide semiconductor layer. A light emitting diode is electrically connected to the driving transistor. A bottom shield layer is disposed between the polyimide layer and the polycrystalline semiconductor layer in a cross-sectional view and disposed around a channel of the driving transistor in a plan view.
    Type: Application
    Filed: July 14, 2021
    Publication date: May 26, 2022
    Inventor: Keun Woo KIM
  • Publication number: 20220139966
    Abstract: A display device includes a substrate, a semiconductor layer disposed on the substrate, and including a first channel portion, a second channel portion, a connecting portion disposed between the first channel portion and the second channel portion, and electrode regions, a first insulating layer disposed on the semiconductor layer, a gate conductor disposed on the first insulating layer and including a first gate electrode overlapping the first channel portion and a second gate electrode overlapping the second channel portion, signal lines disposed on the substrate, a first electrode electrically connected to at least one of electrode regions of the semiconductor layer, an emission layer disposed on the first electrode, and a second electrode disposed on the emission layer, and the first channel portion and the second channel portion of the semiconductor layer each have a first width greater than a second width of the connecting portion.
    Type: Application
    Filed: July 28, 2021
    Publication date: May 5, 2022
    Inventors: Han Bit KIM, Mee Jae KANG, Keun Woo KIM, Doo-Na KIM, Sang Sub KIM, Do Kyeong LEE, Jae Hwan CHU
  • Patent number: 11309373
    Abstract: A display device includes: a pixel at a display region. The pixel includes: a light-emitting element connected between a first power source and a second power source; and a first transistor connected between the first power source and the light-emitting element, the first transistor to control a driving current of the light-emitting element in response to a voltage of a first node. The first transistor includes a first driving transistor and a second driving transistor that are connected in series with each other between the first power source and the light-emitting element, and the first driving transistor and the second driving transistor have structures that are asymmetric with each other in a cross-sectional view.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: April 19, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Keun Woo Kim, Yong Su Lee, Myoung Geun Cha, Doo Na Kim, Sang Sub Kim, Jae Hwan Chu, Sang Gun Choi
  • Patent number: 11306777
    Abstract: A magnetic bearing control apparatus includes a plurality of output elements configured to generate electromagnetic force, a magnetic bearing configured to float a rotation shaft from a surface of the magnetic bearing based on the electromagnetic force generated by the plurality of output elements, at least one displacement sensor configured to sense a displacement of the rotation shaft, and a controller. The controller is configured to control a current supplied to the plurality of output elements, to control a position of the rotation shaft based on the current supplied to the plurality of output elements according to the displacement of the rotation shaft, and to determine a failure of the displacement sensor.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: April 19, 2022
    Assignee: LG Electronics Inc.
    Inventors: Keun Woo Jung, Kyung Min Kim, Jonghyun Jeon, Joonsik An
  • Patent number: 11289105
    Abstract: An encoding/decoding apparatus and method for controlling a channel signal is disclosed, wherein the encoding apparatus may include an encoder to encode an object signal, a channel signal, and rendering information for the channel signal, and a bit stream generator to generate, as a bit stream, the encoded object signal, the encoded channel signal, and the encoded rendering information for the channel signal.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: March 29, 2022
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jeong Il Seo, Seung Kwon Beack, Dae Young Jang, Kyeong Ok Kang, Tae Jin Park, Yong Ju Lee, Keun Woo Choi, Jin Woong Kim
  • Publication number: 20220076750
    Abstract: A memory device according to an embodiment of the present disclosure may include a string including a plurality of memory cells and a select transistor connected between a conductive line and the plurality of memory cells; a peripheral circuit configured to perform an erase operation of the string; and a control logic configured to control the peripheral circuit to increase a voltage level of an erase voltage applied to the conductive line for a first time period from time one to later time two at a first voltage-time slope, and increase the voltage level of the erase voltage for a second time period from time two to later time three at a second voltage-time slope, during the erase operation, wherein the second voltage-time slope is greater than the first voltage-time slope.
    Type: Application
    Filed: March 11, 2021
    Publication date: March 10, 2022
    Applicant: SK hynix Inc.
    Inventors: Seong Ju PARK, Keun Woo LEE, In Geun LIM
  • Patent number: 11238926
    Abstract: A memory controller having an improved operation speed controls a memory device including a plurality of memory blocks. The memory controller includes: a remaining count determiner configured to determine a remaining count that is a number of program and erase operations to be additionally performed in the memory device based on a program/erase count received from the memory device, a retention period calculator configured to determine a retention period based on a power-off time and a power-on time of the memory device and a read voltage determiner configured to generate a changed read voltage table based on a default read voltage table and a coefficient determined according to the remaining count, and determine a read voltage to be used in the memory device according to the retention period among read voltages included in the changed read voltage table.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: February 1, 2022
    Assignee: SK hynix Inc.
    Inventors: You Min Ji, Keun Woo Lee
  • Patent number: 11195444
    Abstract: A display device includes: a pixel unit including a plurality of pixels; a scan driver having a plurality of stages and configured to supply a scan signal to the pixel unit; and a light emission control driver having a plurality of stages and configured to supply a light emission control signal to the pixel unit, wherein a first transistor of a plurality of transistors included in at least one of the stages of the scan driver or the stages of the light emission control driver comprises: an active layer pattern on a base layer, and including a channel region forming a channel, and first and second regions on opposite sides of the channel region; and a gate electrode spaced apart from the active layer pattern with a first insulating film therebetween, and overlapping the channel region.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: December 7, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Keun Woo Kim, Tae Wook Kang, Hye Na Kwak, Doo Na Kim, Han Bit Kim, Bum Mo Sung, Do Kyeong Lee, Yong Su Lee, Jae Hwan Chu
  • Publication number: 20210376025
    Abstract: A display device includes: a plurality of pixels on a substrate, each of the plurality of pixels including a light emitting element and a pixel circuit configured to drive the light emitting element, wherein the pixel circuit of each of the plurality of pixels comprises: a first-first transistor configured to control a driving current flowing through the light emitting element based on a voltage of a first node; a first-second transistor connected in series with the first-first transistor and configured to control the driving current based on a voltage of a second node; a second transistor configured to selectively supply a data voltage to a third node which is a first electrode of the first-first transistor; a third-first transistor connected between the first node and a fourth node which is a second electrode of the first-second transistor; and a third-second transistor connected between the second node and the fourth node.
    Type: Application
    Filed: April 30, 2021
    Publication date: December 2, 2021
    Inventors: Keun Woo KIM, Tae Wook KANG
  • Publication number: 20210358967
    Abstract: A flexible display device includes: a flexible substrate; a semiconductor layer on the flexible substrate, the semiconductor layer including a polycrystalline semiconductor; a gate insulation layer on the semiconductor layer; and a gate electrode on the gate insulation layer, the gate electrode overlapping a channel region of the semiconductor layer in a plan view, wherein the semiconductor layer includes a source region and a drain region that are at opposite sides of the channel region, wherein the channel region includes a first region contacting the source region and a second region contacting the drain region, and wherein a channel width of the first region is greater than a channel width of the second region.
    Type: Application
    Filed: April 13, 2021
    Publication date: November 18, 2021
    Inventor: Keun Woo KIM
  • Patent number: 11164526
    Abstract: A display device including pixels is provided. Each of the pixels includes a first transistor having a gate electrode connected to a first node, a first electrode connected to a second node, and a second electrode connected to a third node, a second transistor having a gate electrode connected to a first scan line, a first electrode connected to a data line, and a second electrode connected to the second node, and a third transistor having a first gate electrode connected to the first scan line, a second gate electrode, a first electrode connected to the first node, and a second electrode connected to the third node. The second gate electrode may be in a floating state, and the third transistor may be aged to alleviate a leakage current in order to improve image generation.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: November 2, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Keun Woo Kim, Mee Jae Kang, Han Bit Kim, Thanh Tien Nguyen, Yong Su Lee, Jae Seob Lee