Patents by Inventor Hwan Hwang

Hwan Hwang 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).

  • Catalyst for oxidative dehydrogenation, method of preparing catalyst, and method of performing oxidative dehydrogenation using catalyst
    Patent number: 11660584
    Abstract: Provided is a catalyst for oxidative dehydrogenation, a method of preparing the catalyst, and a method of performing oxidative dehydrogenation using the catalyst. The catalyst for oxidative dehydrogenation has improved durability and fillability by including a porous support coated with a metal oxide (AB2O4) according to Equation 1: X wt %+Y wt %=100 wt %,??<Equation 1> wherein X is a content of AB2O4 and is 5 or more and less than 30, and Y is a content of the porous support and is more than 70 and 95 or less, wherein the metal oxide exhibits activity during oxidative dehydrogenation. Therefore, when the catalyst is used in oxidative dehydrogenation of butene, the conversion rate of butene and the selectivity and yield of butadiene may be greatly improved.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: May 30, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Myung Ji Suh, Dong Hyun Ko, Kyong Yong Cha, Dae Heung Choi, Ye Seul Hwang, Jun Kyu Han, Sun Hwan Hwang
  • Semiconductor package having a high reliability
    Patent number: 11664352
    Abstract: A semiconductor package includes a package substrate, a plurality of semiconductor devices stacked on the package substrate, a plurality of underfill fillets disposed between the plurality of semiconductor devices and between the package substrate and the plurality of semiconductor devices, and a molding resin at least partially surrounding the plurality of semiconductor devices and the plurality of underfill fillets. The plurality of underfill fillets include a plurality of protrusions that protrude from spaces between each of the plurality of semiconductor devices or between the package substrate and each of the plurality of semiconductor devices. At least two neighboring underfill fillet protrusions of the plurality of protrusions form one continuous structure without an interface therebetween.
    Type: Grant
    Filed: May 24, 2021
    Date of Patent: May 30, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Hwan Hwang, Sang-Sick Park, Tae-Hong Min, Geol Nam
  • Magnetic composite sheet and coil component
    Patent number: 11657950
    Abstract: A coil component includes a body and a coil portion embedded in the body, wherein the body comprises a first magnetic metal powder particle comprising a core represented by Formula 1 below, and an oxide film comprising at least one of silicon (Si) and chromium (Cr) and formed on a surface of the core, a second magnetic metal powder particle having a larger diameter than the first magnetic metal powder particle, and a third magnetic metal powder particle having a larger diameter than the second magnetic metal powder particle: FeaSibCrc??[Formula 1] where 3 atom %?b?6 atom %, 2.65 atom %?c?3.65 atom %, and a+b+C=100.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: May 23, 2023
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jong Ok Jeon, Jeong Ho Lim, Il Jin Park, Soon Kwang Kwon, Gwang Hwan Hwang
  • DISPLAY DEVICE AND METHOD OF DRIVING THE SAME
    Publication number: 20230154372
    Abstract: A display device includes PAM data lines receiving PAM and PWM data voltages, and sub-pixels connected to the PAM and PWM data lines. A sub-pixel includes a light emitting element, a first pixel driver to supply a control current according to one of the PAM data voltages to a node, a second pixel driver to generate a driving current according to one of the PWM data voltages, and a third pixel driver to adjust a period during which the driving current is supplied to the light emitting element according to a voltage of the node. A peak current value of the driving current when the sub-pixel emits a light corresponding to a low gray level region is smaller than a peak current value of the driving current when the sub-pixel emits a light corresponding to a high gray level region higher than the low gray level region.
    Type: Application
    Filed: June 30, 2022
    Publication date: May 18, 2023
    Inventors: Jung Hwan HWANG, Hyun Joon KIM, Kye Uk LEE, Jun Ki JEONG
  • MASK ASSEMBLY AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20230154941
    Abstract: A mask assembly includes a frame including a frame opening, and a mask disposed on the frame. The mask includes a body portion including an upper surface and a lower surface opposing each other and deposition openings spaced apart from each other, protrusions protruding from the upper surface and surrounding the corresponding deposition openings, and at least one step formation pattern overlapping the protrusions in a plan view and disposed in the body portion.
    Type: Application
    Filed: September 21, 2022
    Publication date: May 18, 2023
    Applicant: Samsung Display Co., Ltd.
    Inventors: JEONGKUK KIM, HWI KIM, YOUNGMIN MOON, SEUNGYONG SONG, AREUM LEE, EUNBEE JO, KYU HWAN HWANG
  • MASK ASSEMBLY AND METHOD OF REPAIRING THE SAME
    Publication number: 20230146922
    Abstract: A repairing method of a mask assembly includes providing a mask assembly including a frame, an open mask including a first opening disposed on an upper surface of the frame, and a first unit mask including a plurality of first deposition openings to overlap the first opening in a plan view and disposed on an upper surface of the open mask, first cutting the open mask at an outside of the first unit mask such that a second opening having a size greater than a size of the first opening is defined, and connecting the second unit mask including a plurality of second deposition openings corresponding to the plurality of first deposition openings to the first cut open mask.
    Type: Application
    Filed: October 7, 2022
    Publication date: May 11, 2023
    Applicant: Samsung Display Co., Ltd.
    Inventors: JEONGKUK KIM, HWI KIM, YOUNGMIN MOON, SEUNGYONG SONG, AREUM LEE, EUNBEE JO, KYU HWAN HWANG
  • PHENYLCARBAZOLE-BASED COMPOUNDS AND FLUORENE-BASED COMPOUNDS AND ORGANIC LIGHT EMITTING DEVICE AND FLAT PANEL DISPLAY DEVICE COMPRISING THE SAME
    Publication number: 20230120805
    Abstract: An organic light emitting device including: a substrate; a first electrode; a second electrode; and an organic layer interposed between the first electrode and the second electrode and including an emission layer, wherein one of the first electrode and the second electrode is a reflective electrode and the other is a semitransparent or transparent electrode, and wherein the organic layer includes a layer having at least one of the compounds having at least one carbazole group, and a flat panel display device including the organic light emitting device. The organic light emitting device has low driving voltage, excellent current density, high brightness, excellent color purity, high efficiency, and long lifetime.
    Type: Application
    Filed: October 18, 2022
    Publication date: April 20, 2023
    Inventors: Seok-Hwan HWANG, Young-Kook KIM, Yoon-Hyun KWAK, Jong-Hyuk Lee, Kwan-Hee Lee, Min-Seung Chun
  • DISPLAY DEVICE
    Publication number: 20230124542
    Abstract: A display device includes: a first pixel driver to generate a control current; a second pixel driver to generate a driving current, and control a period during which the driving current flows, based on the control current; and a light-emitting element connected to the second pixel driver to receive the driving current. The first pixel driver includes: a first transistor to generate the control current based on a first data voltage; and a second transistor to provide the first data voltage to a first electrode of the first transistor based on a scan write signal from a scan write line. The second pixel driver includes: a third transistor to generate the driving current based on the control current; and a fourth transistor to provide a second data voltage to a first electrode of the third transistor based on a scan write signal from the scan write line.
    Type: Application
    Filed: June 24, 2022
    Publication date: April 20, 2023
    Inventors: Jung Hwan HWANG, Hyun Joon KIM, Kye Uk LEE, Sang Jin JEON, Jun Ki JEONG
  • DISPLAY DEVICE HAVING A PIXEL DRIVER WITH A PULSE WIDTH MODULATION AND A PULSE AMPLITUDE MODULATION SIGNALS
    Publication number: 20230121681
    Abstract: A display device includes a scan write line, a PWM emission line, a PAM emission line, a sweep signal line, a first data line, a second data line, and a subpixel connected thereto, and including a light emitting element, a first pixel driver to supply a control current to a node according to the first data voltage in response to the PWM emission signal, a second pixel driver to generate a driving current according to the second data voltage in response to the PWM emission signal, and a third pixel driver to supply the driving current to the light emitting element according to the PAM emission signal and a voltage of the node, wherein the PWM emission signal includes a plurality of PWM pulses, the PAM emission signal includes a plurality of PAM pulses, and a number of the PWM pulses is greater than a number of the PAM pulses.
    Type: Application
    Filed: June 17, 2022
    Publication date: April 20, 2023
    Inventors: Jung Hwan HWANG, Hyun Joon KIM, Kye Uk LEE, Sang Jin JEON, Jun Ki JEONG
  • DISPLAY PANEL AND REPAIR METHOD THEREOF
    Publication number: 20230120823
    Abstract: A display panel can include a substrate, a light-emitting element including an emission region on the substrate, a reference voltage line adjacent to the light-emitting element, and a branch line connected to the reference voltage line to apply a reference voltage to light-emitting element. The light-emitting element can emit light on the emission region in a direction of the substrate. Further, the branch line can include a semiconductor layer, and the semiconductor layer of the branch line can overlap the emission region.
    Type: Application
    Filed: December 16, 2022
    Publication date: April 20, 2023
    Applicant: LG Display Co., Ltd.
    Inventors: Dong Yoon LEE, Kwang Yong CHOI, Seong Hwan HWANG, Byeong Uk GANG, Hye Min PARK
  • MANUFACTURING METHOD FOR MASK
    Publication number: 20230116956
    Abstract: Provided is a mask manufacturing method including preparing a preliminary mask sheet including a first surface and a second surface facing each other, forming a mask support part including a concave part recessed from the first surface and a protrusion part adjacent to the concave part and protruding from the first surface by irradiating a first laser light to the first surface of the preliminary mask sheet, and forming an opening part adjacent to the protrusion part and penetrating the preliminary mask sheet by irradiating a second laser light on the second surface of the preliminary mask sheet.
    Type: Application
    Filed: August 2, 2022
    Publication date: April 20, 2023
    Applicant: Samsung Display Co., Ltd.
    Inventors: HWI KIM, JEONGKUK KIM, SEUNGYONG SONG, AREUM LEE, KYU HWAN HWANG
  • DISPLAY DEVICE AND METHOD OF INSPECTING THE SAME
    Publication number: 20230120477
    Abstract: A display device includes connection lines, pulse amplitude modulation (PAM) data lines configured to receive pulse width modulation (PWM) data voltages, PWM data lines configured to receive the PWM data voltages, a first connection control line configured to receive a first connection control signal, a second connection control line configured to receive a second connection control signal, subpixels connected to the PWM data lines and the PAM data lines, and a first demultiplexer (demux) unit configured to connect the connection lines to the PAM data lines or to the PWM data lines according to the first connection control signal and the second connection control signal.
    Type: Application
    Filed: September 9, 2022
    Publication date: April 20, 2023
    Inventors: Jung Hwan HWANG, Hyun Joon KIM, Kye Uk LEE, Jun Ki JEONG, Sang Jin JEON
  • DISPLAY DEVICE
    Publication number: 20230119036
    Abstract: A display device includes a first pixel driver connected to a sweep line, the first pixel driver generating a control current based on a first data voltage, a second pixel driver connected to a scan control line, the second pixel driver generating a driving current based on a second data voltage and controlling a period for which the driving current flows, based on the control current, and a light-emitting element connected to the second pixel driver to receive the driving current. The first pixel driver includes a first transistor generating the control current based on the first data voltage, a second transistor providing the first data voltage to a first electrode of the first transistor based on a scan write signal, and a first capacitor including a first capacitor electrode connected to a gate electrode of the first transistor, and a second capacitor electrode connected to the sweep line.
    Type: Application
    Filed: June 24, 2022
    Publication date: April 20, 2023
    Inventors: Jung Hwan HWANG, Hyun Joon KIM, Kye Uk LEE, Sang Jin JEON, Jun Ki JEONG
  • Display panel
    Patent number: 11631359
    Abstract: A display panel is provided. The display panel includes a display area comprising a gate line and a data line, and a gate driver connected to a terminal of the gate line. The gate driver includes a plurality of stages that are integrated on a substrate, and each stage comprises an inverter unit, an output unit, and a Q node stabilization unit. The output unit includes a first transistor and a first capacitor, wherein the first transistor includes an input terminal for receiving a clock signal, a control terminal connected to a node Q, and an output terminal connected to a gate voltage output terminal to output a gate voltage. A Vgs voltage of a transistor in the Q node stabilization unit has a value of equal to or less than 0 V when the output unit outputs a gate-on voltage.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: April 18, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung Hwan Hwang, Beom Jun Kim, Seong Yeol Syn, Bong-Jun Lee, You Mee Hyun
  • METHOD FOR MASS PRODUCTION OF TARGET PROTEIN IN PLANT
    Publication number: 20230113417
    Abstract: The present invention relates to a method for mass-producing a target protein in a plant and, more specifically, to a method for producing high levels of protein in plant leaf cells, in which an expression cassette construct for high expression of a target gene and an expression cassette construct for high expression of p38 as a gene silencing suppressor, are prepared, a binary vector for transient expression in plant cells, having the construct together, is then prepared, and the binary vector is then subjected to agrobacterium-mediated transformation by using a single agrobacterium culture.
    Type: Application
    Filed: February 1, 2021
    Publication date: April 13, 2023
    Applicants: POSTECH ACADEMY-INDUSTRY FOUNDATION, BioApplications Inc.
    Inventors: In Hwan HWANG, Hyang Ju KANG, Jun Ho LEE, Shijian SONG, Selvan Thangarasu MUTHAMIL
  • SWEEP SIGNAL DRIVER AND DISPLAY DEVICE INCLUDING THE SAME
    Publication number: 20230107775
    Abstract: A sweep signal driver includes: a kth stage to output a kth emission signal to a kth emission line, and a kth sweep signal to a kth sweep signal line, the kth stage including: first, second, and third pull-up nodes; a node connection circuit between the first pull-up node and the second pull-up node, and between the first pull-up node and the third pull-up node; a first output circuit to output a sweep clock signal of a sweep clock terminal to a first output terminal connected to the kth sweep signal line when the third pull-up node has a gate-on voltage; and a second output circuit to output a gate-on voltage to a second output terminal connected to the kth emission line when the second pull-up node has a gate-on voltage. A pulse of the kth sweep signal linearly changes from a gate-off voltage to the gate-on voltage.
    Type: Application
    Filed: April 13, 2022
    Publication date: April 6, 2023
    Inventors: Hyun Joon KIM, Jung Hwan HWANG, Kyung Hoon CHUNG, Jun Ki JEONG
  • APPARATUS FOR PARTICLE MONITORING IN THE CHEMICAL LIQUID AND THE METHOD THEREOF
    Publication number: 20230096330
    Abstract: An apparatus for monitoring particles in a chemical solution includes a chemical solution supply device that stores a chemical solution and supplies the chemical solution according to a work start signal of a control unit, a first supply channel that is connected with the chemical solution supply device to supply the chemical solution, a filter that is connected with the first supply channel to purify the chemical solution, a branch channel and a main channel that are branched from the filter, a drain valve that is connected with the branch channel to open and close the branch channel, a particle monitor that is connected with the main channel to detect the amount of particles in the chemical solution, and a dispenser unit that receives the chemical solution from the particle monitor to supply the chemical solution to an object to be worked.
    Type: Application
    Filed: July 3, 2020
    Publication date: March 30, 2023
    Applicant: SEMICON TECH GLOBAL LIMITED
    Inventors: Soon Suk HONG, Myung Hwan HWANG, Se Hyun JANG
  • DEVICE TO DEVICE COMMUNICATION SYSTEM
    Publication number: 20230087033
    Abstract: Provided is a device-to-device (D2D) communication system for communication between a plurality of devices by a peer-to-peer (P2P) method, wherein, when a transmitting device transmits a connection request, which includes a reception phase difference, in the same radio signal through at least two omnidirectional antennas spaced a certain distance from each other, a receiving device located near the transmitting device receives the connection request, calculate a phase difference of the radio signal, and establish a connection in response to the connection requests only when a difference between the calculated phase difference and the reception phase difference included in the connection request is equal to or less than a set threshold.
    Type: Application
    Filed: September 22, 2022
    Publication date: March 23, 2023
    Applicant: Owlynk Co., Ltd.
    Inventor: Shin Hwan HWANG
  • Composition for preventing, improving, or treating autism spectrum disorders including sp. strain as active ingredient
    Patent number: 11607433
    Abstract: The present invention relates to an Agathobaculum sp. strain having prophylactic or therapeutic effects on autism spectrum disorders, and use thereof. When the intestinal microorganism Agathobaculum sp. strain of the present invention was orally administered to valproic acid (VPA)-induced autism model mice and BTBR autism model mice, the effects of remarkably improving autism spectrum disorders including repetitive behaviors, hyperactivity, social deficiency and cognitive/memory dysfunction of the mice were observed, as compared with a non-treated control. Accordingly, it may be usefully applied to foods, drugs, or feeds for preventing or treating autism spectrum disorders, and thus is very useful in the relevant industries.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: March 21, 2023
    Assignee: HEALTHBIOME
    Inventors: Byoung Chan Kim, Kyoung Shim Kim, Chul Ho Lee, Dong Ho Chang, Yong-Hoon Kim, Jung-Ran Noh, Dong Hui Choi, Jung Hwan Hwang, Jun Go, Jaehun Kim, Hye-Yeon Park, Yun-Jung Seo, Young-Kyoung Ryu, In-Bok Lee, Young Keun Choi, Jung-Hyeon Choi
  • DISPLAY DEVICE AND TILED DISPLAY DEVICE INCLUDING THE SAME
    Publication number: 20230082959
    Abstract: A display device includes a display area which displays an image, and a non-display area disposed around the display area and including a pad part. The display area includes pixels of a first pixel row which are pixels arranged in a first direction along the first pixel row, pixels of a second pixel row, which are pixels arranged in the first direction along the second pixel row next to the first pixel row, and pixel circuits of a first circuit row which are pixel circuits arranged in the first direction along the first circuit row, where the pixel circuits of the first circuit row are electrically connected to the pixels of the first pixel row, respectively. The first pixel row and the first circuit row are spaced apart from each other with the second pixel row interposed therebetween.
    Type: Application
    Filed: June 17, 2022
    Publication date: March 16, 2023
    Inventors: Jun Ki JEONG, Hyun Joon KIM, Kye Uk LEE, Sang Jin JEON, Jung Hwan HWANG