Patents by Inventor Keum Ju LEE

Keum Ju 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).

  • Publication number: 20170047483
    Abstract: Disclosed herein is an LED chip including electrode pads. The LED chip includes a semiconductor stack including a first conductive type semiconductor layer, a second conductive type semiconductor layer on the first conductive type semiconductor layer, and an active layer interposed between the first conductive type semiconductor layer and the second conductive type semiconductor layer; a first electrode pad located on the second conductive type semiconductor layer opposite to the first conductive type semiconductor layer; a first electrode extension extending from the first electrode pad and connected to the first conductive type semiconductor layer; a second electrode pad electrically connected to the second conductive type semiconductor layer; and an insulation layer interposed between the first electrode pad and the second conductive type semiconductor layer. The LED chip includes the first electrode pad on the second conductive type semiconductor layer, thereby increasing a light emitting area.
    Type: Application
    Filed: October 27, 2016
    Publication date: February 16, 2017
    Inventors: Ye Seul Kim, Kyoung Wan Kim, Yeo Jin Yoon, Sang Hyun Oh, Keum Ju Lee, Jin Woong Lee, Da Yeon Jeong, Sang Won Woo
  • Patent number: 9520536
    Abstract: Disclosed herein is an LED chip including electrode pads. The LED chip includes a semiconductor stack including a first conductive type semiconductor layer, a second conductive type semiconductor layer on the first conductive type semiconductor layer, and an active layer interposed between the first conductive type semiconductor layer and the second conductive type semiconductor layer; a first electrode pad located on the second conductive type semiconductor layer opposite to the first conductive type semiconductor layer; a first electrode extension extending from the first electrode pad and connected to the first conductive type semiconductor layer; a second electrode pad electrically connected to the second conductive type semiconductor layer; and an insulation layer interposed between the first electrode pad and the second conductive type semiconductor layer. The LED chip includes the first electrode pad on the second conductive type semiconductor layer, thereby increasing a light emitting area.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: December 13, 2016
    Assignee: SEOUL VIOSYS CO., LTD.
    Inventors: Ye Seul Kim, Kyoung Wan Kim, Yeo Jin Yoon, Sang Hyun Oh, Keum Ju Lee, Jin Woong Lee, Da Yeon Jeong, Sang Won Woo
  • Patent number: 9397264
    Abstract: Disclosed herein in an LED chip including electrode pads. The LED chip includes a semiconductor stack including a first conductive type semiconductor layer, a second conductive type semiconductor layer on the first conductive type semiconductor layer, and an active layer interposed between the first conductive type semiconductor layer and the second conductive type semiconductor layer, a first electrode pad located on the second conductive type semiconductor layer opposite to the second conductive type semiconductor layer; a first electrode extension extending from the first electrode pad and connected to the first conductive type semiconductor layer; a second electrode pad electrically connected to the second conductive type semiconductor layer; and an insulation layer interposed between the first electrode pad and the second conductive type semiconductor layer. The LED chip includes the first electrode pad on the second conductive type semiconductor layer, thereby increasing a light emitting area.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: July 19, 2016
    Assignee: SEOUL VIOSYS CO., LTD.
    Inventors: Ye Seul Kim, Kyoung Wan Kim, Yeo Jin Yoon, Sang Hyun Oh, Keum Ju Lee, Jin Woong Lee, Da Yeon Jeong, Sang Won Woo
  • Publication number: 20160118564
    Abstract: Disclosed herein is an LED chip including electrode pads. The LED chip includes a semiconductor stack including a first conductive type semiconductor layer, a second conductive type semiconductor layer on the first conductive type semiconductor layer, and an active layer interposed between the first conductive type semiconductor layer and the second conductive type semiconductor layer; a first electrode pad located on the second conductive type semiconductor layer opposite to the first conductive type semiconductor layer; a first electrode extension extending from the first electrode pad and connected to the first conductive type semiconductor layer; a second electrode pad electrically connected to the second conductive type semiconductor layer; and an insulation layer interposed between the first electrode pad and the second conductive type semiconductor layer. The LED chip includes the first electrode pad on the second conductive type semiconductor layer, thereby increasing a light emitting area.
    Type: Application
    Filed: December 30, 2015
    Publication date: April 28, 2016
    Inventors: Ye Seul Kim, Kyoung Wan Kim, Yeo Jin Yoon, Sang Hyun Oh, Keum Ju Lee, Jin Woong Lee, Da Yeon Jeong, Sang Won Woo
  • Publication number: 20150236210
    Abstract: Disclosed herein in an LED chip including electrode pads. The LED chip includes a semiconductor stack including a first conductive type semiconductor layer, a second conductive type semiconductor layer on the first conductive type semiconductor layer, and an active layer interposed between the first conductive type semiconductor layer and the second conductive type semiconductor layer, a first electrode pad located on the second conductive type semiconductor layer opposite to the second conductive type semiconductor layer, a first electrode extension extending from the first electrode pad and connected to the first conductive type semiconductor layer, a second electrode pad electrically connected to the second conductive type semiconductor layer, and an insulation layer interposed between the first electrode pad and the second conductive type semiconductor layer. The LED chip includes the first electrode pad on the second conductive type semiconductor layer, thereby increasing a light emitting area.
    Type: Application
    Filed: February 24, 2015
    Publication date: August 20, 2015
    Inventors: Ye Seul Kim, Kyoung Wan Kim, Yeo Jin Yoon, Sang Hyun Oh, Keum Ju Lee, Jin Woong Lee, Da Yeon Jeong, Sang Won Woo
  • Publication number: 20150179879
    Abstract: Disclosed is a light emitting diode (LED) having improved light extraction efficiency. The LED includes a light emitting structure positioned on a substrate and having a first semiconductor layer, an active layer and a second semiconductor layer. A first electrode pad is electrically connected to the first semiconductor layer. A second electrode pad is positioned on the substrate. An insulating reflective layer covers a portion of the light emitting structure, and is positioned under the second electrode pad, so that the second electrode pad is spaced apart from the light emitting structure. At least one upper extension is connected to the second electrode pad to be electrically connected to the second semiconductor layer. Further, a pattern of light extraction elements is positioned on the second semiconductor layer.
    Type: Application
    Filed: March 6, 2015
    Publication date: June 25, 2015
    Inventors: Jeong Hee Yang, Kyoung Wan Kim, Yeo Jin Yoon, Jae Moo Kim, Keum Ju Lee
  • Patent number: 9030090
    Abstract: Disclosed is a light emitting diode (LED) having improved light extraction efficiency. The LED includes a light emitting structure which is positioned on a substrate and has a first conductive type semiconductor layer, an active layer and a second conductive type semiconductor layer. A first electrode pad is electrically connected to the first conductive type semiconductor layer. A second electrode pad is positioned on the substrate. An insulating reflective layer covers a portion of the light emitting structure, and is positioned under the second electrode pad, so that the second electrode pad is spaced apart from the light emitting structure. At least one upper extension is connected to the second electrode pad to be electrically connected to the second conductive type semiconductor layer. Further, a pattern of light extraction elements is positioned on the second conductive type semiconductor layer.
    Type: Grant
    Filed: February 19, 2011
    Date of Patent: May 12, 2015
    Assignee: Seoul Viosys Co., Ltd.
    Inventors: Jeong Hee Yang, Kyoung Wan Kim, Yeo Jin Yoon, Jae Moo Kim, Keum Ju Lee
  • Patent number: 8987772
    Abstract: Disclosed herein is an LED chip including electrode pads. The LED chip includes a semiconductor stack including a first conductive type semiconductor layer, a second conductive type semiconductor layer on the first conductive type semiconductor layer, and an active layer interposed between the first conductive type semiconductor layer and the second conductive type semiconductor layer; a first electrode pad located on the second conductive type semiconductor layer opposite to the first conductive type semiconductor layer; a first electrode extension extending from the first electrode pad and connected to the first conductive type semiconductor layer; a second electrode pad electrically connected to the second conductive type semiconductor layer; and an insulation layer interposed between the first electrode pad and the second conductive type semiconductor layer. The LED chip includes the first electrode pad on the second conductive type semiconductor layer, thereby increasing a light emitting area.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: March 24, 2015
    Assignee: Seoul Viosys Co., Ltd.
    Inventors: Ye Seul Kim, Kyoung Wan Kim, Yeo Jin Yoon, Sang-Hyun Oh, Keum Ju Lee, Jin Woong Lee, Da Yeon Jeong, Sang Won Woo
  • Patent number: 8878220
    Abstract: Exemplary embodiments of the present invention relate to light emitting diodes. A light emitting diode according to an exemplary embodiment of the present invention includes a substrate having a first side edge and a second side edge, and a light emitting structure arranged on the substrate. The light emitting structure includes a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer. A transparent electrode layer including a concave portion and a convex portion is arranged on the second conductivity-type semiconductor layer. A first electrode pad contacts an upper surface of the first conductivity-type semiconductor layer and is located near a center of the first side edge. Two second electrode pads are located near opposite distal ends of the second side edge to supply electric current to the second conductivity-type semiconductor layer.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: November 4, 2014
    Assignee: Seoul Viosys Co., Ltd.
    Inventors: Jeong Hee Yang, Kyoung Wan Kim, Yeo Jin Yoon, Ye Seul Kim, Sang Hyun Oh, Duk Il Suh, Keum Ju Lee, Jin Woong Lee, Da Yeon Jeong
  • Publication number: 20140299905
    Abstract: A light-emitting diode includes a substrate, and a light-emitting structure disposed on the substrate. The light-emitting structure includes a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer. A transparent electrode layer including concave portions and convex portions is disposed on the second conductivity-type semiconductor layer. Micro-lenses are disposed on the transparent electrode layer and completely cover the concave portions, and only partially cover the convex portions that are disposed between the micro-lenses.
    Type: Application
    Filed: June 19, 2014
    Publication date: October 9, 2014
    Inventors: Jeong Hee YANG, Kyoung Wan Kim, Yeo Jin Yoon, Ye Seul Kim, Sang Hyun Oh, Duk Il Suh, Keum Ju Lee, Jin Woong Lee, Da Yeon Jeong
  • Publication number: 20130234192
    Abstract: Disclosed herein is an LED chip including electrode pads. The LED chip includes a semiconductor stack including a first conductive type semiconductor layer, a second conductive type semiconductor layer on the first conductive type semiconductor layer, and an active layer interposed between the first conductive type semiconductor layer and the second conductive type semiconductor layer; a first electrode pad located on the second conductive type semiconductor layer opposite to the first conductive type semiconductor layer; a first electrode extension extending from the first electrode pad and connected to the first conductive type semiconductor layer; a second electrode pad electrically connected to the second conductive type semiconductor layer; and an insulation layer interposed between the first electrode pad and the second conductive type semiconductor layer. The LED chip includes the first electrode pad on the second conductive type semiconductor layer, thereby increasing a light emitting area.
    Type: Application
    Filed: February 28, 2011
    Publication date: September 12, 2013
    Applicant: SEOUL OPTO DEVICE CO., LTD.
    Inventors: Ye Seul Kim, Kyoung Wan Kim, Yeo Jin Yoon, Sang Hyun Oh, Keum Ju Lee, Jin Woong Lee, Da Yeon Jeong, Sang Won Woo
  • Publication number: 20130134867
    Abstract: Disclosed is a light emitting diode (LED) having improved light extraction efficiency. The LED includes a light emitting structure which is positioned on a substrate and has a first conductive type semiconductor layer, an active layer and a second conductive type semiconductor layer. A first electrode pad is electrically connected to the first conductive type semiconductor layer. A second electrode pad is positioned on the substrate. An insulating reflective layer covers a portion of the light emitting structure, and is positioned under the second electrode pad, so that the second electrode pad is spaced apart from the light emitting structure. At least one upper extension is connected to the second electrode pad to be electrically connected to the second conductive type semiconductor layer. Further, a pattern of light extraction elements is positioned on the second conductive type semiconductor layer.
    Type: Application
    Filed: February 19, 2011
    Publication date: May 30, 2013
    Applicant: Seoul Opto Device Co., Ltd.
    Inventors: Jeong Hee Yang, Kyoung Wan Kim, Yeo Jin Yoon, Jae Moo Kim, Keum Ju Lee
  • Publication number: 20120049223
    Abstract: Exemplary embodiments of the present invention relate to light emitting diodes. A light emitting diode according to an exemplary embodiment of the present invention includes a substrate having a first side edge and a second side edge, and a light emitting structure arranged on the substrate. The light emitting structure includes a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer. A transparent electrode layer including a concave portion and a convex portion is arranged on the second conductivity-type semiconductor layer. A first electrode pad contacts an upper surface of the first conductivity-type semiconductor layer and is located near a center of the first side edge. Two second electrode pads are located near opposite distal ends of the second side edge to supply electric current to the second conductivity-type semiconductor layer.
    Type: Application
    Filed: August 15, 2011
    Publication date: March 1, 2012
    Applicant: SEOUL OPTO DEVICE CO., LTD.
    Inventors: Jeong Hee YANG, Kyoung Wan KIM, Yeo Jin YOON, Ye Seul KIM, Sang Hyun OH, Duk Il SUH, Keum Ju LEE, Jin Woong LEE, Da Yeon JEONG