Patents by Inventor Kyung-Sang Cho

Kyung-Sang Cho 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: 8878196
    Abstract: A light-emitting device including a semiconductor nanocrystal layer and a method for producing the light-emitting device are provided. The light-emitting device includes a semiconductor nanocrystal layer whose voids are filled with a filling material. According to the light-emitting device, since voids formed between nanocrystal particles of the semiconductor nanocrystal layer are filled with a filling material, the occurrence of a current leakage through the voids is minimized, which enables the device to have extended service life, high luminescence efficiency, and improved stability.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: November 4, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byoung Lyong Choi, Byung Ki Kim, Kyung Sang Cho, Soon Jae Kwon, Jae Young Choi
  • Patent number: 8853938
    Abstract: Disclosed is an inorganic electroluminescent device. The inorganic electroluminescent device comprises a hole transport layer, a light-emitting layer, an inorganic electron transport layer and an electron injecting electrode sequentially formed on a hole injecting electrode wherein an insulating layer is formed between the electron injecting electrode and the inorganic electron transport layer. Further disclosed are a method for fabricating the electroluminescent device and an electronic device comprising the electroluminescent device. The inorganic electroluminescent device achieves uniform light emission from the entire light-emitting surface of the device, resulting in an improvement in the reliability and stability of the device. The inorganic electroluminescent device is suitable for use in the manufacture of electronic devices, including display devices, illuminators and backlight units.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: October 7, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyung Sang Cho, Byoung Lyong Choi, Jae Ho You, Eun Kyung Lee
  • Patent number: 8846418
    Abstract: A method of manufacturing a quantum dot layer, and a quantum dot optoelectronic device including the quantum dot layer. The method includes sequentially stacking a self-assembled monolayer, a sacrificial layer, and a quantum dot layer on a source substrate; disposing a stamp on the quantum dot layer; picking up the sacrificial layer, the quantum dot layer and the stamp; and removing the sacrificial layer from the quantum dot layer using a solution that dissolves the sacrificial layer.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: September 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae-ho Kim, Kyung-sang Cho, Dae-young Chung, Byoung-lyong Choi
  • Patent number: 8847240
    Abstract: An optoelectronic device is provided including an element that forms a dipole moment between an active layer and a charge transport layer. The optoelectronic device may include an active layer between a first electrode and a second electrode, a first charge transport layer between the first electrode and the active layer, and a dipole layer between the active layer and the first charge transport layer. A second charge transport layer may be further provided between the second electrode and the active layer. The second dipole layer may be further provided between the second charge transport layer and the active layer.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: September 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-young Chung, Kyung-sang Cho, Tae-ho Kim, Byoung-lyong Choi
  • Publication number: 20140247253
    Abstract: A display driver integrated circuit includes a memory unit configured to store image data received from an external host, an image processing chain unit configured to perform image processing on the image data, a data driver configured to control data lines of a display panel based on the image data, and a data path selection unit configured to selectively activate, based on an operation mode of the display driver integrated circuit, one of a first data path and second data path for the image data. The first data path is formed by sequentially connecting the external host, the memory unit, the image processing chain unit and the data driver. The second data path is formed by sequentially connecting the external host, the image processing chain unit, the memory unit and the data driver.
    Type: Application
    Filed: February 21, 2014
    Publication date: September 4, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Kyung-Sang CHO, Woo-Hyun SHIM
  • 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: 20140151612
    Abstract: Provided are nanoparticles passivated with a cationic metal-chalcogenide complex (MCC) and a method of preparing the same.
    Type: Application
    Filed: December 4, 2013
    Publication date: June 5, 2014
    Applicants: AJOU UNIVERSITY INDUSTRY COOPERATION FOUNDATION, SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-sang CHO, Sang-wook KIM, Tae-ho KIM, Dong-hyeok CHOI, Byoung-lyong CHOI
  • Publication number: 20140054541
    Abstract: A method of manufacturing a quantum dot (QD) device includes: forming a first QD solution obtained by dispersing a plurality of QDs in a mixture of a solvent and an anti-solvent; and forming a first QD layer on a substrate structure by applying the first QD solution onto the substrate structure and naturally evaporating the first QD solution.
    Type: Application
    Filed: April 8, 2013
    Publication date: February 27, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-young CHUNG, Kyung-sang CHO, Tae-ho KIM, Byoung-lyong CHOI
  • Publication number: 20140014896
    Abstract: A light emitting device using charge accumulation and a method of manufacturing the light emitting device are provided. The light emitting device includes a substrate, a first electrode formed on the substrate, a hole transport layer formed on the first electrode, an electron transport layer formed on the hole transport layer, and a second electrode formed on the electron transport layer. A thickness of the hole transport layer may be greater than 20 nm and a thickness of the electron transport layer may be greater than 40 nm. A quantum dot (QD) layer may be disposed between the hole transport layer and the electron transport layer.
    Type: Application
    Filed: March 8, 2013
    Publication date: January 16, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-young CHUNG, Kyung-sang CHO
  • Patent number: 8581230
    Abstract: A quantum dot light-emitting device includes a substrate, a first electrode, a hole injection layer (“HIL”), a hole transport layer (“HTL”), an emitting layer, an electron transport layer (“ETL”), a plurality of nanoplasmonic particles buried in the ETL, and a second electrode.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: November 12, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae-ho Kim, Chang-won Lee, Byoung-lyong Choi, Kyung-sang Cho
  • Publication number: 20130146834
    Abstract: A quantum dot-matrix thin film and a method of preparing a quantum dot-matrix thin film are provided. The thin film includes quantum dots; an inorganic matrix in which the quantum dots are imbedded; and an interface layer disposed between the quantum dots and the inorganic matrix to surround surfaces of the quantum dots. The method includes preparing a quantum dot solution in which quantum dots with inorganic ligands are dispersed; adding a matrix precursor to the quantum dot solution; coating the quantum dot solution comprising the matrix precursor on a substrate; and annealing the substrate coated with the quantum dot solution.
    Type: Application
    Filed: August 24, 2012
    Publication date: June 13, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-sang CHO, Ji-yeon KU, Byoung-lyong CHOI
  • Publication number: 20130146838
    Abstract: A quantum dot device includes: a cathode layer; an anode layer; an active layer that is disposed between the cathode layer and the anode layer and includes a quantum layer; and an electron movement control layer that is disposed between the cathode layer and the anode layer and includes a different kind of quantum layer having an energy level different from that of the quantum layer comprised in the active layer.
    Type: Application
    Filed: September 13, 2012
    Publication date: June 13, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ji-yeon KU, Tae-ho KIM, Dae-young CHUNG, Kyung-sang CHO, Byoung-lyong CHOI
  • Publication number: 20130092885
    Abstract: A method of manufacturing nanoparticles including: providing a metal chalcogenide complexes (MCC) hydrazine hydrate solution; providing a first organic solution of nanoparticles with first organic ligands; forming a mixed solution by mixing the MCC hydrazine hydrate solution and the first organic solution of nanoparticles capped with the first organic ligands; and replacing the first organic ligands of the nanoparticles with ligands of the MCC hydrazine hydrate.
    Type: Application
    Filed: May 23, 2012
    Publication date: April 18, 2013
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Kyung-sang CHO, Byoung-lyong CHOI, Tae-ho KIM
  • Publication number: 20130056705
    Abstract: A method of manufacturing a quantum dot layer, and a quantum dot optoelectronic device including the quantum dot layer. The method includes sequentially stacking a self-assembled monolayer, a sacrificial layer, and a quantum dot layer on a source substrate; disposing a stamp on the quantum dot layer; picking up the sacrificial layer, the quantum dot layer and the stamp; and removing the sacrificial layer from the quantum dot layer using a solution that dissolves the sacrificial layer.
    Type: Application
    Filed: May 29, 2012
    Publication date: March 7, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tae-ho KIM, Kyung-sang CHO, Dae-young CHUNG, Byoung-lyong CHOI
  • Publication number: 20130015424
    Abstract: An optoelectronic device is provided including an element that forms a dipole moment between an active layer and a charge transport layer. The optoelectronic device may include an active layer between a first electrode and a second electrode, a first charge transport layer between the first electrode and the active layer, and a dipole layer between the active layer and the first charge transport layer. A second charge transport layer may be further provided between the second electrode and the active layer. The second dipole layer may be further provided between the second charge transport layer and the active layer.
    Type: Application
    Filed: February 29, 2012
    Publication date: January 17, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-young CHUNG, Kyung-sang CHO, Tae-ho KIM, Byoung-lyong CHOI
  • Patent number: 8330142
    Abstract: A quantum dot light emitting device includes; a substrate, a first electrode disposed on the substrate, a second electrode disposed substantially opposite to the first electrode, a first charge transport layer disposed between the first electrode and the second electrode, a quantum dot light emitting layer disposed between the first charge transport layer and one of the first electrode and the second electrode, and at least one quantum dot including layer disposed between the quantum dot light emitting layer and the first charge transport layer, wherein the at least one quantum dot including layer has an energy band level different from an energy band level of the quantum dot light emitting layer.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: December 11, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyung-sang Cho, Byoung-lyong Choi, Eun-kyung Lee, Tae-ho Kim, Sang-jin Lee
  • Publication number: 20120145244
    Abstract: A photoreceptive layer including heterogeneous dyes is provided. The dye fill density is enhanced and light absorption is achieved at a broad wavelength range, which enables the beneficial utilization of the photoreceptive layer in a dye-sensitized solar cell.
    Type: Application
    Filed: February 23, 2012
    Publication date: June 14, 2012
    Inventors: Won-cheol Jung, Kyung-sang Cho, Jung-gyu Nam, Sang-cheol Park
  • Publication number: 20120120057
    Abstract: A display driver integrated circuit includes a source driver driving source lines of the display panel. A plurality of memory devices stores image data to be displayed by the display panel. A memory controller controls a write operation and a read operation of the plurality of memory devices. A timing controller controls the memory controller such that the image data in the plurality of memory devices is displayed as three-dimensional (3D) image data and controls the source driver such that the generated 3D image data is provided to the display panel.
    Type: Application
    Filed: September 19, 2011
    Publication date: May 17, 2012
    Inventors: Kyung-Sang Cho, Gyoocheol Hwang, Kyungsuc Nah, Woohyun Shim
  • Patent number: 8120010
    Abstract: A quantum dot electroluminescent device that includes a substrate, a quantum dot light-emitting layer disposed on the substrate, a first electrode which injects charge carriers into the quantum dot light-emitting layer, a second electrode which injects charge carriers, which have an opposite charge than the charge carriers injected by the first electrode, into the quantum dot light-emitting layer, a hole transport layer disposed between the first electrode and the quantum dot light-emitting layer, and an electron transport layer disposed between the second electrode and the quantum dot light-emitting layer, wherein the quantum dot light-emitting layer has a first surface in contact with the hole transport layer and a second surface in contact with an electron transport layer, and wherein the first surface has an organic ligand distribution that is different from an organic ligand distribution of the second surface.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: February 21, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyung Sang Cho, Byoung Lyong Choi, Eun Kyung Lee
  • Publication number: 20120037851
    Abstract: A particle has a permanent dipole moment, a film includes the particle, and a method of forming the film includes aligning the particle on a surface. The particle has a permanent dipole moment and includes heterogeneous materials, wherein a positive pole is located in a first material and a negative pole is located in a second material different from the first material. The method includes aligning a particle such that the particle has one dipole moment direction. The film includes the aligned particles.
    Type: Application
    Filed: January 31, 2011
    Publication date: February 16, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Kyung-sang CHO, Dae-young CHUNG, Sang-jin LEE