Patents by Inventor Cha Lee

Cha 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).

  • NEAR UV LIGHT EMITTING DEVICE
    Publication number: 20150041760
    Abstract: Disclosed is a near UV light emitting device. The light emitting device includes an n-type contact layer, a p-type contact layer, an active area of a multi-quantum well structure disposed between the n-type contact layer and the p-type contact layer, and at least one electron control layer disposed between the n-type contact layer and the active area. Each of the n-type contact layer and the p-type contact layer includes an AlInGaN or AlGaN layer, and the electron control layer is formed of AlInGaN or AlGaN. In addition, the electron control layer contains a larger amount of Al than adjacent layers to obstruct flow of electrons moving into the active area. Accordingly, electron mobility is deteriorated, thereby improving recombination rate of electrons and holes in the active area.
    Type: Application
    Filed: October 28, 2014
    Publication date: February 12, 2015
    Inventors: Chang Suk HAN, Hwa Mok Kim, Hyo Shik Choi, Mi So Ko, A Ram Cha Lee
  • NEAR UV LIGHT EMITTING DEVICE
    Publication number: 20130256630
    Abstract: Disclosed herein is an ultraviolet (UV) light emitting device. The light emitting device includes an n-type contact layer including a GaN layer; a p-type contact layer including a GaN layer; and an active layer of a multi-quantum well structure disposed between the n-type contact layer and the p-type contact layer, the active area configured to emit near ultraviolet light at wavelengths of 365 nm to 309 nm.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 3, 2013
    Applicant: Seoul Opto Device Co., Ltd.
    Inventors: Chang Suk HAN, Hwa Mok KIM, Hyo Shik CHOI, Mi So KO, A Ram Cha LEE