Patents by Inventor Yai-Kun Tsai

Yai-Kun Tsai 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).

  • Button apparatus with a complex elastic unit
    Patent number: 6761494
    Abstract: A button apparatus with dual elastic elements includes a base, a key top located above the base, an elevation mechanism, and a complex elastic unit. The elevation mechanism is used to execute lifting and lowering operation between the base and the key top. The complex elastic unit, positioned between the base and the key top for providing resilience to the button apparatus, further includes a lower elastic element mounted on the base and an upper elastic element mounted under the key top. When the button apparatus is operated, an S-shaped resilience pattern can be provided by the complex elastic unit to generate a two-step punch feeling back to the user. Thereby, controllability of the button apparatus can be enhanced.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: July 13, 2004
    Assignee: Darfon Electronics Corp.
    Inventors: Chien-Shih Hsu, Yai-Kun Tsai
  • Button apparatus with a complex elastic unit
    Publication number: 20030136658
    Abstract: A button apparatus with dual elastic elements includes a base, a key top located above the base, an elevation mechanism, and a complex elastic unit. The elevation mechanism is used to execute lifting and lowering operation between the base and the key top. The complex elastic unit, positioned between the base and the key top for providing resilience to the button apparatus, further includes a lower elastic element mounted on the base and an upper elastic element mounted under the key top. When the button apparatus is operated, an S-shaped resilience pattern can be provided by the complex elastic unit to generate a two-step punch feeling back to the user. Thereby, controllability of the button apparatus can be enhanced.
    Type: Application
    Filed: January 15, 2003
    Publication date: July 24, 2003
    Applicant: Darfon Electronics Corp.
    Inventors: Chien-Shih Hsu, Yai-Kun Tsai