Patents by Inventor Tae-woon Cha

Tae-woon Cha 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: 8780313
    Abstract: The present invention relates to a liquid crystal display that maintains a more uniform cell gap and improves adherence between two display panels by improving adhesion between substrates and their bead spacers, as well as a manufacturing method thereof. An exemplary liquid crystal display includes: a first substrate and a second substrate facing each other; a bead spacer comprising a plurality of beads and a first adhesive coupling the beads to the first substrate; a second adhesive corresponding to the bead spacer and disposed on the second substrate so as to contact the bead spacer; and a liquid crystal layer disposed between the first substrate and the second substrate.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: July 15, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Woo Yong Sung, Tae Woon Cha, Jeong Ho Lee, Hyoung Wook Lee
  • Patent number: 8777686
    Abstract: A method of jetting a liquid crystal includes loading a substrate on a stage, controlling a surface temperature of an inkjet head and a substrate to be a setting temperature, and jetting the liquid crystal molecules on the substrate having the setting temperature.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: July 15, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae-Gyun Kim, Seung-Yeon Chae, Tae-Woon Cha
  • Publication number: 20140192302
    Abstract: A display includes a plurality of pixel columns and a plurality of pixel rows including a first pair of pixel rows and a second pair of pixel rows adjacent to each other. The LCD also includes a first gate line and a second gate line positioned between the first pair of pixel rows and the second pair of pixel rows, a microcavity layer including a plurality of liquid crystal injection holes, and a common electrode positioned on the microcavity layer. The LCD also includes a supporting member positioned on a common electrode and a capping layer positioned on a supporting member to cover the liquid crystal injection holes. The plurality of liquid crystal injection holes may be positioned between the first pair of pixel rows and the second pair of pixel rows.
    Type: Application
    Filed: December 20, 2013
    Publication date: July 10, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Dong Hwan KIM, Si Kwang Kim, Ha-Young Park, Tae Woon Cha, Se Hee Han
  • Patent number: 8764144
    Abstract: Provided are method of controlling nozzles of an inkjet head and an apparatus for measuring the amounts of ink ejected from the nozzles of the inkjet head. The method includes: preparing a mass measuring device, which measures the mass of ink by using an oscillation change, in a pixel; ejecting ink into the pixel from a nozzle of the inkjet head, and measuring the amount of ink ejected from the nozzle by using the mass measuring device; and adjusting a voltage waveform applied to the nozzle of the inkjet head.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: July 1, 2014
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Tae-gyun Kim, Tae-woon Cha, Sang-il Kim
  • Patent number: 8765014
    Abstract: Disclosed herein is a quantum dot ink composition for inkjet printing. The quantum dot ink composition comprises a highly viscous polymeric additive. Quantum dots can be ejected by inkjet printing and the concentration of the quantum dots in the quantum dot ink composition can be freely controlled. In addition, the loading amount of the quantum dots can be reduced. Based on these advantages, the quantum dot ink composition can be used as a material for light-emitting layers of a variety of electronic devices. Also disclosed herein is an electronic device fabricated using the quantum dot ink composition.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: July 1, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyung Sang Cho, Tae Woon Cha
  • Publication number: 20140176847
    Abstract: A method of manufacturing a display device includes: providing an outline frame on a first substrate; and providing a thin film by dropping a thin film material inside a boundary defined by the outline frame. The outline frame limits a boundary of the thin film, and the frame material of the outline frame includes a material having a surface energy that is less than a surface energy of the thin film material of the thin film.
    Type: Application
    Filed: April 4, 2013
    Publication date: June 26, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Woo Yong SUNG, Jeong Ho LEE, Cha-Dong KIM, Tae Woon CHA
  • Publication number: 20140160419
    Abstract: A display device and a method of manufacturing the display device are provided. Moisture may be prevented from penetrating into the display device. The display device includes a substrate including a pixel area. A thin film transistor is formed on the substrate. A pixel electrode is connected to the thin film transistor and formed in the pixel area. A roof layer is formed on the pixel electrode. The roof layer is separated from the pixel electrode via a microcavity. A liquid crystal layer fills the microcavity. A liquid crystal injection hole is formed in the roof layer and exposes a portion of the microcavity. An encapsulation layer is formed on the roof layer. The encapsulation layer covers the liquid crystal injection hole and seals the microcavity for the pixel area. The encapsulation layer includes a multilayer structure.
    Type: Application
    Filed: April 11, 2013
    Publication date: June 12, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: A RAM LEE, WOO YONG SUNG, TAE GYUN KIM, SEUNG-YEON CHAE, SANG GUN CHOI, TAE WOON CHA
  • Publication number: 20140146278
    Abstract: A display panel with microcavities each having ends of asymmetric cross-sectional area. An exemplary display panel has a substrate; an electrode disposed on the substrate; and a supporting member disposed on the electrode. The supporting member is shaped to form a cavity between the supporting member and the electrode. The cavity has a first opening at one end of the supporting member and a second opening at an opposite end of the supporting member, the first opening being positioned over the electrode. A cross-sectional area of the first opening is smaller than a cross-sectional area of the second opening.
    Type: Application
    Filed: August 8, 2013
    Publication date: May 29, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hee-Keun LEE, Hae Ju YUN, Jung Wook LEE, Seon Uk LEE, Dong Hwan KIM, Sung Jun KIM, Yeun Tae KIM, Hyoung Sub LEE, Sung Woo CHO, Tae Woon CHA, Sang Gun CHOI
  • Publication number: 20140141682
    Abstract: An inkjet apparatus for depositing liquid crystal according to an exemplary embodiment of the present invention includes: an inkjet head configured to discharge liquid crystal; a liquid crystal reservoir configured to provide the liquid crystal to the inkjet head, and the liquid crystal reservoir comprises metal; a storing tank configured to supply the liquid crystal to the liquid crystal reservoir; and a heat supply device configured to supply heat to the liquid crystal reservoir, in which a separation part is disposed inside of the liquid crystal reservoir, and the separation part divides the liquid crystal reservoir into an upper storing space and a lower storing space.
    Type: Application
    Filed: March 14, 2013
    Publication date: May 22, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: TAE GYUN KIM, SEUNG-YEON CHAE, HYOUNG SUB LEE, TAE WOON CHA
  • Publication number: 20140063424
    Abstract: A display device includes a lower display panel, an upper display panel facing the lower display panel, a metal oxide layer surrounding outermost surfaces of the upper display panel and the lower display panel, and a barrier layer surrounding the metal oxide layer. The barrier layer includes a self-assembled monolayer.
    Type: Application
    Filed: January 7, 2013
    Publication date: March 6, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Woo Yong SUNG, A. Ram LEE, Tae Woon CHA, Sang Youn HAN
  • Publication number: 20140028925
    Abstract: A manufacturing method of a liquid crystal display includes: providing a thin film transistor on a substrate; providing a pixel electrode connected to the thin film transistor; providing a microcavity layer including a liquid crystal material on the pixel electrode; providing a supporting member layer on the microcavity layer; patterning the supporting member layer to form a plurality of recess portions therein; and providing a plurality of touch signal lines for transmitting a touch signal in the plurality of recess portions.
    Type: Application
    Filed: November 29, 2012
    Publication date: January 30, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang Gun CHOI, Woo Yong SUNG, Tae Woon CHA
  • Publication number: 20140028956
    Abstract: A display panel includes an array substrate, an opposite substrate facing the array substrate, and a liquid crystal layer between the substrates. The array substrate includes a first polarizer, a first insulating layer covering the first metal layer, a gate electrode on the first insulating layer, a gate insulation layer on the gate electrode, a channel layer on the gate insulation layer, source and drain electrodes on the channel layer, a protecting layer covering the source and drain electrodes and including a contact hole exposing the drain electrode, and a first electrode on the protecting layer and electrically connected to the drain electrode through the contact hole. The first polarizer includes a first substrate, a first antistatic layer on the first substrate and including a conductive material, and a first metal layer on the first antistatic layer and including a plurality of protrusions which form a wire grid pattern.
    Type: Application
    Filed: January 4, 2013
    Publication date: January 30, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang-Gun CHOI, Woo-Yong SUNG, Tae-Woon CHA
  • Publication number: 20140023778
    Abstract: A touch screen substrate includes an insulation ball formed on a substrate having a first diameter, a sensing electrode formed on the substrate, and a conductive ball formed on the sensing electrode having a second diameter shorter than the first diameter. A cell gap spacer for maintaining a cell gap of a touch screen panel and a spacer for electrically connecting a lower substrate with an upper substrate of the touch screen panel may be formed via a single spraying process.
    Type: Application
    Filed: September 25, 2013
    Publication date: January 23, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Woo-Yong Sung, Tae-Woon Cha, Tae-Gyun Kim
  • Publication number: 20130342889
    Abstract: An electrowetting display device includes a first substrate comprising a wall pattern surrounding a pixel electrode disposed in a display area of the first substrate, a spaced apart second substrate comprising a common electrode and a dam member disposed in a peripheral area surrounding the display area. The dam member has sealable openings (a.k.a. sealable dam spillways) through which there is discharged an excess portion of an excessively supplied wetting layer, the discharge of the excess occurring while the first and second substrates are brought together about top and bottom portions of a sealing ring that seals them together.
    Type: Application
    Filed: October 19, 2012
    Publication date: December 26, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dong-Hwan KIM, Sung-Ku BAEK, Gil-Hwan YEO, Tae-Woon CHA, Gyung-Mo TAHK
  • Publication number: 20130342607
    Abstract: An inkjet print head includes a jet assembly, a printed-circuit board and a barrier coating film. The jet assembly includes a nozzle plate including a jet orifice in a lower surface of the nozzle plate and through which ink is discharged, and an ink transfer pathway inside nozzle plate. The printed-circuit board is combined with the jet assembly. The printed-circuit board includes an integrated circuit and a connection electrode. The barrier coating film includes organic material, a flexible layer and a hydrophobic layer. The barrier coating film covers an inner and an outer surface of the jet assembly, and an outer surface of the printed-circuit board. The barrier coating film exposes the lower surface of the nozzle plate and an outer surface of the connection electrode.
    Type: Application
    Filed: November 17, 2012
    Publication date: December 26, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Woo-Yong SUNG, A-Ram LEE, Tae-Gyun KIM, Tae-Woon CHA, Sang-Gun CHOI
  • Publication number: 20130335483
    Abstract: An inkjet print head includes a jet assembly which includes a nozzle plate, the nozzle plate including an ink transferring path on a bottom surface of the nozzle plate, and a jet jetting a transferred ink out of the head. A printed circuit substrate is connected to the jet assembly and includes an integrated circuit and a connection electrode. A barrier coating layer covers a surface of the printed circuit substrate and an inner surface and an outer surface of the jet assembly except a bottom surface of the nozzle plate and a surface of the connection electrode of the jet assembly and the printed circuit substrate being connected with each other. The barrier coating layer has a layered structure which includes a flexible layer, a diffusion barrier layer, and a hydrophobic layer.
    Type: Application
    Filed: October 17, 2012
    Publication date: December 19, 2013
    Applicant: Samsung Display Co., Ltd.
    Inventors: Woo-Yong SUNG, A-Ram Lee, Tae-Woon Cha, Tae-Gyun Kim, Hyoung Sub Lee, Seung-Yeon Chae, Sang Gun Choi
  • Publication number: 20130335804
    Abstract: A method of manufacturing an electrowetting display device includes a preliminary partition wall pattern formed on a lower substrate on which a pixel electrode of an oxide series and an insulation layer are formed. The preliminary partition wall pattern is disposed along a boundary of the pixel electrode. A water-repellent layer including a self-assembled monolayer having a hydrophobic property is formed on the lower substrate. A portion of the preliminary partition wall pattern and the water-repellent layer formed on the preliminary partition wall pattern are removed to form a partition wall pattern on the insulation layer and to form a water-repellent pattern on the pixel electrode and the insulation layer between partition walls of the partition wall patterns. A fluid layer is formed on the lower substrate on which the water-repellent pattern is formed. The lower substrate and an upper substrate are combined with each other.
    Type: Application
    Filed: November 23, 2012
    Publication date: December 19, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Woo-Yong SUNG, A-Ram Lee, Tae-Gyun Kim, Tae-Woon Cha, Sang-Gun Choi
  • Patent number: 8596762
    Abstract: An inkjet printer head including a nozzle part, a driving part, a printing liquid supplying part, an adhesive and a leak preventing part. The nozzle part includes a first surface and a second surface opposite the first surface. A nozzle is formed in the first surface sprays a printing liquid. A receiving hole is formed in the second surface receives the printing liquid. The driving part is disposed on the second surface of the nozzle part and drives the nozzle part. The printing liquid supplying part supplies the printing liquid to the nozzle part. The adhesive bonds the printing liquid supplying part onto the second surface. The receiving hole is formed in the second surface. The leak preventing part is disposed between the printing liquid supplying part and the driving part. The leak preventing part is formed to cover an exposed surface of the adhesive.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: December 3, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jeong-Ho Lee, Woo-Yong Sung, Tae-Woon Cha
  • Patent number: 8580352
    Abstract: A method of manufacturing a touch screen substrate includes forming a sensing electrode on a substrate, spraying a first ink and a second ink having a same amount of ink as the first ink to respectively form a first ink droplet and a second ink droplet on a light blocking region of the substrate, and irradiating a first light upon the first ink droplet to form a first spacer having a first height and a second light upon the second ink droplet to form a second spacer having a second height lower than the first height. A total energy of the first light irradiated upon the first ink droplet differs from a total energy of the second light irradiated upon the second ink droplet, and the second spacer makes contact with the sensing electrode.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: November 12, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Woo-Yong Sung, Tae-Woon Cha, Tae-Gyun Kim
  • Publication number: 20130267143
    Abstract: A method of jetting a liquid crystal includes loading a substrate on a stage, controlling a surface temperature of an inkjet head and a substrate to be a setting temperature, and jetting the liquid crystal molecules on the substrate having the setting temperature.
    Type: Application
    Filed: November 16, 2012
    Publication date: October 10, 2013
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Tae-Gyun KIM, Seung-Yeon CHAE, Tae-Woon CHA