Patents by Inventor Yoon-sok Kang

Yoon-sok Kang 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: 7321503
    Abstract: A method of driving a multi-state organic memory device which includes an organic memory layer between upper and lower electrodes. The method comprises continuously applying voltages having different polarities to conduct switching into a low resistance state, and applying a single pulse to conduct switching into a high resistance state. A multi-state memory is realized using one memory device, since it is possible to gain three or more resistance states, thus significantly improving integration. The method has excellent reproducibility, and the resistance state induced by multiple pulses has an excellent nonvolatile characteristic.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: January 22, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won Jae Joo, Yoon Sok Kang, Kwang Hee Lee
  • Patent number: 7294371
    Abstract: Provided are a liquid crystal compound represented by formula 1, a liquid crystal composition including the same, and a liquid crystal display including the liquid crystal composition: wherein X1, X2, R1, R2, L and are the same as described in specification. High optical anisotropy and negative dielectric anisotropy can be achieved by the use of the liquid crystal composition including the liquid crystal compound.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: November 13, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-seob Kim, Yoon-sok Kang, Jee-hwan Jang, Jong-min Wang, Byung-soon Chen
  • Publication number: 20060238671
    Abstract: A photo-luminescence (PL) liquid crystal display (LCD) is provided. The PL LCD includes a blue backlight, red and green phosphor layers, and blue photo-luminescent nano-dot (ND) layer. The PL LCD improves conventional problems of a narrow viewing angle and orientation. The PL LCD further includes an ultraviolet (UV) filter blocking UV contained in ambient light, thus preventing excitation of light-emitting layer due to external light and degradation in the contrast ratio due to unnecessary light emission.
    Type: Application
    Filed: January 23, 2006
    Publication date: October 26, 2006
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Byung-ki Kim, Seung-jae Im, Jae-young Choi, Yoon-sok Kang, Seon-mi Yoon, Jae-hee Cho
  • Publication number: 20050104039
    Abstract: Provided are a liquid crystal compound represented by formula 1, a liquid crystal composition including the same, and a liquid crystal display including the liquid crystal composition: wherein X1, X2, R1, R2, L and are the same as described in specification. High optical anisotropy and negative dielectric anisotropy can be achieved by the use of the liquid crystal composition including the liquid crystal compound.
    Type: Application
    Filed: September 27, 2004
    Publication date: May 19, 2005
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jong-seob Kim, Yoon-sok Kang, Jee-hwan Jang, Jong-min Wang, Byung-soon Chen