Patents by Inventor Ji-Hwan Yoon

Ji-Hwan Yoon 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: 20150280162
    Abstract: An organic light emitting device including a plurality of organic layers between a first electrode and an emitting layer, wherein the organic layer includes an electron blocking layer. In one embodiment, a first organic layer, an electron blocking layer, a second organic layer and an emitting layer are formed on the first electrode. The electron blocking layer has a Lowest Unoccupied Molecular Orbital (LUMO) level which is lower than that of the first organic layer. Thus, the electron blocking layer traps excess electrons injected from the emitting layer, thereby improving lifetime characteristics of the OLED.
    Type: Application
    Filed: June 5, 2015
    Publication date: October 1, 2015
    Inventors: Ji-Hwan Yoon, Kwan-Hee Lee, Sung-Jun Bae
  • Publication number: 20150255741
    Abstract: An organic light emitting diode device includes: an anode; a hole auxiliary layer on one side of the anode; an emission layer on one side of the hole auxiliary layer; and a cathode on one side of the emission layer; the hole auxiliary layer including: a hole injection layer; a hole transport layer; a first hole transport auxiliary layer between the hole injection layer and the hole transport layer and including a first p-type dopant and a first host having a first HOMO level; and a second hole transport auxiliary layer between the hole injection layer and the hole transport layer and including a second p-type dopant and a second host having a second HOMO level different from the first HOMO level.
    Type: Application
    Filed: July 31, 2014
    Publication date: September 10, 2015
    Inventors: Heun Seung Lee, Sang Woo Pyo, Hyo Yeon Kim, Hye Yeon Shim, Ji Hwan Yoon, Sang Woo Lee, Kyul Han
  • Patent number: 9099650
    Abstract: An organic light-emitting display device, a method of manufacturing the same, and a donor substrate and a donor substrate set used to manufacture the organic light-emitting display device.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: August 4, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyo Yeon Kim, Ha Jin Song, Sang Woo Lee, Hye Yeon Shim, Heun Seung Lee, Kyul Han, Ji Hwan Yoon
  • Patent number: 9093663
    Abstract: An organic light-emitting display including a conductive-organic small molecular filling material and methods of manufacturing the same are disclosed. The organic light-emitting display includes a substrate, a display unit disposed on the substrate, a sealing substrate disposed above the display unit, a sealing member that attaches the substrate to the sealing substrate and disposed outside the display unit; and a filling material filling a space between the substrate and the sealing substrate inwards from the sealing member, wherein the filling material is a conductive-organic small molecule.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: July 28, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Hwan Yoon, Chang-Ho Lee, Sang-Woo Pyo
  • Patent number: 9093753
    Abstract: An artificial magnetic conductor includes a conductor layer, a ground layer, and a via. The conductor layer is formed in a first direction and includes a plurality of grid cells. The ground layer is formed in a second direction that is opposite to the first direction and generates a lower frequency than that of an artificial magnetic conductor including a plurality of grid cells having the same size as that of the plurality of grid cells of the conductor layer and a conductor plate having a form that is not modified. The via is formed between the conductor layer and the ground layer to electrically connect the conductor layer and the ground layer.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: July 28, 2015
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Young Bae Jung, Soon Young Eom, Soon Ik Jeon, Young Joong Yoon, Jihwan Ahn, Ji Hwan Yoon
  • Patent number: 9089035
    Abstract: An organic light emitting display device includes a substrate; a thin film transistor disposed on the substrate; and an organic light emitting component disposed on the substrate and electrically connected to the thin film transistor. The organic light emitting component includes: a first electrode; a second electrode; and an intermediate layer disposed between the first electrode and the second electrode. The organic light emitting display device further includes: a temperature sensing unit disposed on the substrate, the temperature sensing unit being configured to operate differently based on an ambient temperature of the organic light emitting display device; a power driver configured to provide power to the temperature sensing unit; and a voltage control unit configured to: determine a driving voltage of the temperature sensing unit based on the power provided to the temperature sensing unit; and determine the ambient temperature based on the driving voltage.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: July 21, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyul Han, Sang-Woo Pyo, Ji-Hwan Yoon
  • Publication number: 20150194623
    Abstract: An organic light-emitting device and a method of manufacturing the same, including a substrate; a plurality of first electrodes on the substrate in a first to third light-emitting region; a first common layer on the substrate, the first common layer covering the plurality of first electrodes; a first light-emitting layer in the first light-emitting region and on the first common layer; a second light-emitting layer in the second light-emitting region and on the first common layer; a third light-emitting layer in the third light-emitting region and on the first common layer; a second common layer that is commonly disposed on the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer; a second electrode on the second common layer; and an auxiliary layer that is commonly disposed only in the first light-emitting region and the second light-emitting region between the first common layer and the second common layer.
    Type: Application
    Filed: April 15, 2014
    Publication date: July 9, 2015
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang-Woo PYO, Ha-Jin SONG, Byeong-Wook YOO, Ji-Hwan YOON, Kyul HAN
  • Patent number: 9054318
    Abstract: An organic light emitting device including a plurality of organic layers between a first electrode and an emitting layer, wherein the organic layer includes an electron blocking layer. In one embodiment, a first organic layer, an electron blocking layer, a second organic layer and an emitting layer are formed on the first electrode. The electron blocking layer has a Lowest Unoccupied Molecular Orbital (LUMO) level which is lower than that of the first organic layer. Thus, the electron blocking layer traps excess electrons injected from the emitting layer, thereby improving lifetime characteristics of the OLED.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: June 9, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Hwan Yoon, Kwan-Hee Lee, Sung-Jun Bae
  • Publication number: 20150155338
    Abstract: An organic light emitting diode display includes a p-doped layer that can obtain high efficiency at low-voltage driving and low current and prevent leakage current by differentially forming the p-doped layer for each pixel.
    Type: Application
    Filed: February 9, 2015
    Publication date: June 4, 2015
    Inventors: Ja-Hyun Im, Jung-Min Moon, Tae-Kwang Sung, Ji-Hwan Yoon, Byung-Hoon Chun
  • Publication number: 20150115230
    Abstract: An organic light-emitting display including a conductive-organic small molecular filling material and methods of manufacturing the same are disclosed. The organic light-emitting display includes a substrate, a display unit disposed on the substrate, a sealing substrate disposed above the display unit, a sealing member that attaches the substrate to the sealing substrate and disposed outside the display unit; and a filling material filling a space between the substrate and the sealing substrate inwards from the sealing member, wherein the filling material is a conductive-organic small molecule.
    Type: Application
    Filed: March 21, 2014
    Publication date: April 30, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Ji-Hwan Yoon, Chang-Ho Lee, Sang-Woo Pyo
  • Publication number: 20150090972
    Abstract: An organic light-emitting diode (OLED) display is disclosed. In one aspect, the OLED display includes red, green, and blue pixels. Each pixel includes a pixel electrode, a hole auxiliary layer formed over the pixel electrode, and an organic emission layer formed over the hole auxiliary layer. Each pixel also includes an electron auxiliary layer formed over the organic emission layer, and a common electrode formed over the electron auxiliary layer. Each of the red and green pixels further includes a host layer formed between the hole auxiliary layer and the organic emission layer and a resonance layer formed between the host layer and the organic emission layer.
    Type: Application
    Filed: June 26, 2014
    Publication date: April 2, 2015
    Inventors: Bum Suk LEE, Ha Jin Song, Ji Hwan Yoon, Ji Young Kwon, Byeong Wook Yoo, Ji Myoung Ye
  • Patent number: 8987714
    Abstract: An organic light emitting diode display includes a p-doped layer that can obtain high efficiency at low-voltage driving and low current and prevent leakage current by differentially forming the p-doped layer for each pixel.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: March 24, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ja-Hyun Im, Ji-Hwan Yoon, Byung-Hoon Chun, Jung-Min Moon, Tae-Kwang Sung
  • Publication number: 20150054426
    Abstract: An organic light emitting display device includes a substrate; a thin film transistor disposed on the substrate; and an organic light emitting component disposed on the substrate and electrically connected to the thin film transistor. The organic light emitting component includes: a first electrode; a second electrode; and an intermediate layer disposed between the first electrode and the second electrode. The organic light emitting display device further includes: a temperature sensing unit disposed on the substrate, the temperature sensing unit being configured to operate differently based on an ambient temperature of the organic light emitting display device; a power driver configured to provide power to the temperature sensing unit; and a voltage control unit configured to: determine a driving voltage of the temperature sensing unit based on the power provided to the temperature sensing unit; and determine the ambient temperature based on the driving voltage.
    Type: Application
    Filed: March 4, 2014
    Publication date: February 26, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Kyul HAN, Sang-Woo PYO, Ji-Hwan YOON
  • Publication number: 20150021559
    Abstract: An organic light-emitting display apparatus includes a display substrate, a display panel on the display substrate and including a pixel region including an organic light-emitting device (OLED), and a non-pixel region, and an encapsulation substrate for encapsulating the display panel, wherein the encapsulation substrate defines at least one groove therein in which a color filer is located.
    Type: Application
    Filed: November 15, 2013
    Publication date: January 22, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Kyul Han, Hyo-Yeon Kim, Hye-Yeon Shim, Sang-Woo Lee, Heun-Seung Lee, Sang-Woo Pyo, Ji-Hwan Yoon, Gyeong-Hui Hwang
  • Publication number: 20150014642
    Abstract: A donor substrate for a laser transfer includes a base layer, a primer layer disposed on the base layer, a light-to-heat conversion layer disposed on the primer layer, and an intermediate layer disposed on the light-to-heat conversion layer, where the light-to-heat conversion layer includes graphene.
    Type: Application
    Filed: December 18, 2013
    Publication date: January 15, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Ji-Young KWON, Ji-Hwan YOON, Sang-Woo PYO, Ha-Jin SONG, Byeong-Wook YOO, Bum-Suk LEE, Ji-Myoung YE, Yi-Seul KIM
  • Publication number: 20150008394
    Abstract: An organic light emitting diode (OLED) display includes a substrate, a thin film transistor formed on the substrate, a first electrode formed on the thin film transistor and electrically connected to the thin film transistor, a hole injection layer (HIL) formed on the first electrode, a hole transport layer (HTL) formed on the hole injection layer (HIL), an emission layer formed on the HTL, an electron transport layer (ETL) formed on the emission layer, a first buffer layer located on the ETL, and a second electrode formed on the first buffer layer.
    Type: Application
    Filed: December 5, 2013
    Publication date: January 8, 2015
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Il-Soo OH, Chang-Ho Lee, Ji-Hwan Yoon, Dae-Yup Shin, Hee-Joo Ko, Se-Jin Cho, Jin-Young Yun, Bora Lee, Yeon-Woo Lee, Beom-Joon Kim, Pyung-Eun Jeon, Hyun-Ju Choi, Joong-Won Sim, In-Jae Lee
  • Publication number: 20150008404
    Abstract: An organic light emitting diode (OLED) display includes a substrate, a thin film transistor disposed on the substrate, a first electrode disposed on the thin film transistor and electrically connected to the thin film transistor, a first auxiliary layer disposed on the first electrode, an emission layer disposed on the first auxiliary layer, an electron transport layer disposed on the emission layer, a first buffer layer disposed on the electron transport layer, and a second electrode disposed on the first buffer layer.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 8, 2015
    Inventors: Il Soo OH, Chang Ho LEE, Ji Hwan YOON, Dae Yup SHIN, Hee Joo KO, Se Jin CHO, Jin Young YUN, Bora LEE, Yeon-Woo LEE, Beom Joon KIM, Pyung Eun JEON, Hyun Ju CHOI, Joong Won SIM, In Jae LEE
  • Patent number: 8921843
    Abstract: A full color light emitting device having a reduced driving voltage includes a substrate having a first subpixel, a second subpixel, and a third subpixel. A plurality of first electrodes are in the first subpixel, the second subpixel, and the third subpixel. A second electrode faces the first electrode. An emission layer is between the first electrode and the second electrode. The emission layer includes a first emission layer in the first subpixel for emitting a first color light in the first subpixel, a second emission layer in the first subpixel for emitting a second color light in the second subpixel, and a third emission layer in the first subpixel, the second subpixel and the third subpixel, for emitting a third color light in the third subpixel.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: December 30, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ha-Jin Song, Se-Hun Kim, Dae-Yup Shin, Sang-Woo Lee, Sang-Woo Pyo, Byeong-Wook Yoo, Ji-Young Kwon, Bum-Suk Lee, Ji-Myoung Ye, Ji-Hwan Yoon
  • Publication number: 20140374707
    Abstract: An organic light emitting display includes a substrate; a first pixel electrode disposed on the substrate; a second pixel electrode disposed on the substrate; a hole auxiliary layer disposed on the first pixel electrode and the second pixel electrode; a first organic emission layer disposed on the hole auxiliary layer in correspondence with the first pixel electrode and the second pixel electrode; a blue organic emission layer disposed on the hole auxiliary layer in correspondence with the first pixel electrode and the second pixel electrode, the blue organic emission layer being further disposed on the first organic emission layer; a non-doping blue organic emission layer disposed on the blue organic emission layer; an electron auxiliary layer disposed on the non-doping blue organic emission layer; and a common electrode disposed on the electron auxiliary layer.
    Type: Application
    Filed: January 20, 2014
    Publication date: December 25, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Hoon SEO, Kwan-Hee LEE, Ji-Hwan YOON, Byung-Hoon Chun, Ja-Hyun IM
  • Patent number: 8907330
    Abstract: An organic light emitting diode display including a substrate, a first electrode on the substrate, a light-emitting layer on the first electrode, a second electrode on the light-emitting layer, and a p-doping layer between the first electrode and the light-emitting layer.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: December 9, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ja-Hyun Im, Tae-Kwang Sung, Ji-Hwan Yoon, Kwan-Hee Lee