Patents by Inventor Chun-Kai Wang

Chun-Kai Wang 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: 20090057696
    Abstract: A light-emitting diode device (LED) device and manufacturing methods thereof are provided, wherein the LED device comprises a substrate, a first n-type semiconductor layer, an n-type three-dimensional electron cloud structure, a second n-type semiconductor layer, an active layer and a p-type semiconductor layer. The first n-type semiconductor layer, the n-type three-dimensional electron cloud structure, the second n-type semiconductor layer, the active layer and the p-type semiconductor layer are subsequently grown on the substrate.
    Type: Application
    Filed: August 18, 2008
    Publication date: March 5, 2009
    Applicant: EPISTAR CORPORATION
    Inventors: Cheng-Ta Kuo, Yu-Pin Hsu, Chun-Kai Wang, Jui-Yi Chu, Tsung-Kuang Chen
  • Publication number: 20080274573
    Abstract: Green light emitting diodes (LED) of gallium arsenide (GaAs) are series-connected. The series connection has a small transmission attenuation and a wide bandwidth. The GaAs LED has a big forward bias and so neither extra driving current nor complex resonant-cavity epitaxy layer is needed. Hence, the present invention has a high velocity, a high efficiency and a high power while an uneven current distribution is avoided.
    Type: Application
    Filed: November 16, 2007
    Publication date: November 6, 2008
    Applicant: National Central University
    Inventors: Jin-Wei Shi, Jinn-Kong Sheu, Mao-Jen Wu, Chun-Kai Wang, C.-H. Chen, Jen-Inn Chyi
  • Publication number: 20070150323
    Abstract: A method and a system for generating supply chain planning information are provided, which are used to dynamically adjust the control factors of the supply information provided by an original supplier and an original logistics provider, after the first supply chain planning information has been generated through a conventional supply chain planning information system, so as to generate much more supply information to process. Then, the information is processed by a planning engine of the supply chain planning information system to further generate other supply chain planning information among which to select in decision making. Hence, a decision maker can select and find out improved ways to negotiate with suppliers, so as to reduce the total cost and also meet customers' service quality requirements.
    Type: Application
    Filed: June 21, 2006
    Publication date: June 28, 2007
    Inventors: June-Ray Lin, Chi-Hung Huang, Chun-Kai Wang, Chia-Chun Shih