Patents by Inventor Cheol Hwan Lee

Cheol Hwan Lee 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).

  • Patent number: 11982013
    Abstract: A raw material feed hopper according to the present embodiment may include a hollow tube having a raw material accommodating space formed therein, a supporter supporting the hollow tube, a cone accommodated in the raw material accommodating space so as to be able to lift up and down, a rod connected to the cone, a connector connected to an upper portion of the rod, a lifting rod connected to the connector, and an elevator installed on the supporter for lifting up and down the lifting rod.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: May 14, 2024
    Assignee: SK SILTRON CO., LTD.
    Inventors: Sang Heon Lee, Chang Youn Lee, Cheol Hwan Kim
  • Patent number: 11973106
    Abstract: A semiconductor device includes a lower electrode; a supporter supporting an outer wall of the lower electrode; a dielectric layer formed on the lower electrode and the supporter; an upper electrode on the dielectric layer; a first interfacial layer disposed between the lower electrode and the dielectric layer and selectively formed on a surface of the lower electrode among the lower electrode and the supporter; and a second interfacial layer disposed between the dielectric layer and the upper electrode, wherein the first interfacial layer is a stack of a metal oxide contacting the lower electrode and a metal nitride contacting the dielectric layer.
    Type: Grant
    Filed: July 5, 2022
    Date of Patent: April 30, 2024
    Assignee: SK hynix Inc.
    Inventors: Jae Hee Song, Dong Hyun Lee, Kyung Woong Park, Cheol Hwan Park, Ki Vin Im
  • Patent number: 11964594
    Abstract: A device for preventing rotation of a vehicle seat rail is described. The device prevents an upper rail on the center side of a vehicle from rotating when a forward load is applied to a vehicle seat, thereby preventing a lock plate from being fractured due to rotation of the upper rail.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: April 23, 2024
    Assignee: HYUNDAI TRANSYS INC.
    Inventors: Hwa Young Mun, Kyeong Ju Kim, Cheol Hwan Yoon, Jung Bin Lee, Jun Sik Hwang
  • Publication number: 20230217690
    Abstract: A viewing angle switchable display device can include a display panel including first, second, and third sub-pixels, each of the first, second, and third sub-pixels having a first emission area and a second emission area spaced apart from the first emission area; and a lens layer disposed over the display panel and including a first type of lens corresponding to the first emission area and a second type of lens corresponding to the second emission area, in which the first type of lens has a different shape than the second type of lens. Also, the display panel is configured to display an image according to a wide view mode via the first emission area and the first type of lens, and display the image according to a narrow view mode via the second emission area and the second type of lens.
    Type: Application
    Filed: November 28, 2022
    Publication date: July 6, 2023
    Applicant: LG Display Co., Ltd.
    Inventors: Soon-Hwan HONG, Chang-Soo KIM, Sang-Hak SHIN, Cheol-Hwan LEE, Seong-Yeong KIM
  • Patent number: 8760595
    Abstract: Fringe field switching (FFS) mode liquid crystal display device and method for fabricating the same, are discussed, the device including a gate line formed in one direction on a surface of a first substrate; a data line formed on the first substrate, and crossed with the gate line to thereby define a pixel region; a thin-film transistor formed on the first substrate, and formed at an intersection of the gate line and the data line; an insulating layer having an opening portion located at an upper portion of the thin-film transistor to expose at least a gate portion of the thin-film transistor; a pixel electrode formed at an upper portion of the insulating layer, and connected to the exposed thin-film transistor; a passivation layer formed at the upper portion of the insulating layer; and common electrodes formed at an upper portion of the passivation layer and separated from one another.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: June 24, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Seung-Kyu Choi, Sun-Hwa Lee, Dong-Su Shin, Cheol-Hwan Lee, Won-Keun Park
  • Patent number: 8593595
    Abstract: Discussed are a color filter using a surface plasmon and a liquid crystal display (LCD) device, the color filter capable of enhancing a transmittance ratio of an LC panel by having a 3D pattern structure of a transmissive pattern for selectively transmitting light of a specific wavelength, and capable of simplifying entire processes. According to the color filter using a surface plasmon and the LCD device, not only three colors of RGB but also multi-colors can be implemented, and color reproduction can be enhanced by optimizing arrangement of the transmissive pattern according to the number of colors to be implemented.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: November 26, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Se-Young Park, Jeong-Hyun Kim, Sung-Chol Yi, Chang-Gu Lee, Cheol-Hwan Lee
  • Patent number: 8570450
    Abstract: A stereoscopic image display device and a method for manufacturing the same are disclosed, in which switching between a two-dimensional image and a three-dimensional image is performed using an electro wettable material depending on whether a voltage is applied. The stereoscopic image display device comprises a display panel; a first electrode formed on one surface of the display panel; a wall formed to divide a plurality of lens areas at the boundary of the respective lens areas on the first electrode; an electro-wettable material included in the wall; a first substrate formed on the wall to face the display panel; and a second electrode formed at the center of each wall on the first substrate.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: October 29, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Cheol-Hwan Lee, Dae-Jung Choi
  • Publication number: 20130063673
    Abstract: Fringe field switching (FFS) mode liquid crystal display device and method for fabricating the same, are discussed, the device including a gate line formed in one direction on a surface of a first substrate; a data line formed on the first substrate, and crossed with the gate line to thereby define a pixel region; a thin-film transistor formed on the first substrate, and formed at an intersection of the gate line and the data line; an insulating layer having an opening portion located at an upper portion of the thin-film transistor to expose at least a gate portion of the thin-film transistor; a pixel electrode formed at an upper portion of the insulating layer, and connected to the exposed thin-film transistor; a passivation layer formed at the upper portion of the insulating layer; and common electrodes formed at an upper portion of the passivation layer and separated from one another.
    Type: Application
    Filed: August 22, 2012
    Publication date: March 14, 2013
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Seung-Kyu CHOI, Sun-Hwa LEE, Dong-Su SHIN, Cheol-Hwan LEE, Won-Keun PARK
  • Patent number: 8379171
    Abstract: Discussed are an FFS mode LCD device capable of enhancing a transmittance ratio by including a color filter of a three-dimensional pattern structure having a transmissive pattern for selectively transmitting light of a specific wavelength by using a surface plasmon phenomenon, and a method for fabricating the same. The metal layer using a surface plasmon is utilized as a common electrode of the array substrate, and the pixel electrode having slits is formed on the metal film, thereby generating a fringe field. This may simplify the entire processes, and remove color filter processing lines, thereby reducing the installation costs.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: February 19, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Cheol-Hwan Lee, Jeong-Hyun Kim, Sung-Chol Yi, Chang-Gu Lee, Se-Young Park
  • Patent number: 8343787
    Abstract: A method of fabricating an LCD device is discussed. The method in one embodiment includes: forming a gate electrode and a gate pad on a substrate, which is defined into a display area corresponding to pixel regions and a non-display area corresponding to pad regions, through a first mask process; sequentially stacking a gate insulation film, an amorphous silicon layer, an impurity-doped amorphous silicon layer and a metal film on the substrate provided with the gate electrode and then forming an active layer, source/drain electrode and a data line through a second mask process which uses one of half-tone and diffraction masks; and forming a transparent conductive material on the substrate provided with the source/drain electrode and forming a pixel electrode through a third mask process.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: January 1, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Cheol Hwan Lee, Jong Won Moon
  • Publication number: 20120190143
    Abstract: A method of fabricating an LCD device is discussed. The method in one embodiment includes: forming a gate electrode and a gate pad on a substrate, which is defined into a display area corresponding to pixel regions and a non-display area corresponding to pad regions, through a first mask process; sequentially stacking a gate insulation film, an amorphous silicon layer, an impurity-doped amorphous silicon layer and a metal film on the substrate provided with the gate electrode and then forming an active layer, source/drain electrode and a data line through a second mask process which uses one of half-tone and diffraction masks; and forming a transparent conductive material on the substrate provided with the source/drain electrode and forming a pixel electrode through a third mask process.
    Type: Application
    Filed: November 25, 2011
    Publication date: July 26, 2012
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Cheol Hwan LEE, Jong Won MOON
  • Publication number: 20120019523
    Abstract: A stereoscopic image display device and a method for manufacturing the same are disclosed, in which switching between a two-dimensional image and a three-dimensional image is performed using an electro wettable material depending on whether a voltage is applied. The stereoscopic image display device comprises a display panel; a first electrode formed on one surface of the display panel; a wall formed to divide a plurality of lens areas at the boundary of the respective lens areas on the first electrode; an electro-wettable material included in the wall; a first substrate formed on the wall to face the display panel; and a second electrode formed at the center of each wall on the first substrate.
    Type: Application
    Filed: July 20, 2011
    Publication date: January 26, 2012
    Inventors: Cheol-Hwan Lee, Dae-Jung Choi
  • Patent number: 7965354
    Abstract: A color filter substrate for a liquid crystal display and a method of fabricating the same are provided. The color filter substrate for a liquid crystal display includes: light shielding parts formed on a front surface of a substrate at predetermined intervals to prevent light leakage; color filter Layers disposed between the light shielding parts on the front surface of the substrate and including color filter patterns of red (R), green (G) and blue (B) for implementing a color image; and a transparent conductive layer formed on a rear surface of the substrate, where the rear surface of the substrate is opposite the front surface of the substrate on which the color filter layers are formed, and formed in a porous structure having a plurality of holes spaced at predetermined intervals. Therefore, it is possible to shield an electrostatic field due to external static electricity and improve image display quality, thereby increasing high brightness characteristics and readability.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: June 21, 2011
    Assignee: Hydis Technologies Co., Ltd.
    Inventors: Cheol Hwan Lee, Yoon Seok Choi, Dae Suk Kim, Suk Choi
  • Publication number: 20110102716
    Abstract: Discussed are a color filter using a surface plasmon and a liquid crystal display (LCD) device, the color filter capable of enhancing a transmittance ratio of an LC panel by having a 3D pattern structure of a transmissive pattern for selectively transmitting light of a specific wavelength, and capable of simplifying entire processes. According to the color filter using a surface plasmon and the LCD device, not only three colors of RGB but also multi-colors can be implemented, and color reproduction can be enhanced by optimizing arrangement of the transmissive pattern according to the number of colors to be implemented.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 5, 2011
    Inventors: Se-Young PARK, Jeong-Hyun Kim, Sung-Chol Yi, Chang-Gu Lee, Cheol-Hwan Lee
  • Publication number: 20110102714
    Abstract: Discussed are an FFS mode LCD device capable of enhancing a transmittance ratio by including a color filter of a three-dimensional pattern structure having a transmissive pattern for selectively transmitting light of a specific wavelength by using a surface plasmon phenomenon, and a method for fabricating the same. The metal layer using a surface plasmon is utilized as a common electrode of the array substrate, and the pixel electrode having slits is formed on the metal film, thereby generating a fringe field. This may simplify the entire processes, and remove color filter processing lines, thereby reducing the installation costs.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 5, 2011
    Inventors: Cheol-Hwan LEE, Jeong-Hyun KIM, Sung-Chol YI, Chang-Gu LEE, Se-Young PARK
  • Patent number: 7903208
    Abstract: A color filter substrate for a liquid crystal display and a method of fabricating the same are provided. The color filter substrate for a liquid crystal display includes: light shielding parts formed on a front surface of a substrate at predetermined intervals to prevent light leakage; color filter Layers disposed between the light shielding parts on the front surface of the substrate and including color filter patterns of red (R), green (G) and blue (B) for implementing a color image; and a transparent conductive layer formed on a rear surface of the substrate, where the rear surface of the substrate is opposite the front surface of the substrate on which the color filter layers are formed, and formed in a porous structure having a plurality of holes spaced at predetermined intervals. Therefore, it is possible to shield an electrostatic field due to external static electricity and improve image display quality, thereby increasing high brightness characteristics and readability.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: March 8, 2011
    Assignee: Hydis Technologies Co., Inc.
    Inventors: Cheol Hwan Lee, Yoon Seok Choi, Dae Suk Kim, Suk Choi
  • Publication number: 20080252831
    Abstract: A color filter substrate for a liquid crystal display and a method of fabricating the same are provided. The color filter substrate for a liquid crystal display includes: light shielding parts formed on a substrate at predetermined intervals to prevent light leakage; color filter Layers disposed between the light shielding parts and including color filter patterns of red (R), green (G) and blue (B) for implementing a color image; and a transparent conductive layer formed on a rear surface of the substrate, on which the color filter layers are formed, and formed in a porous structure having a plurality of holes spaced at predetermined intervals. Therefore, it is possible to shield an electrostatic field due to external static electricity and improve image display quality, thereby increasing high brightness characteristics and readability.
    Type: Application
    Filed: April 8, 2008
    Publication date: October 16, 2008
    Applicant: BOE Hydis Technology Co., Ltd
    Inventors: Cheol Hwan Lee, Yoon Seok Choi, Dae Suk Kim, Suk Choi