Patents by Inventor Sarun Sumriddetchkajorn

Sarun Sumriddetchkajorn 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).

  • Optical touch switch structures
    Patent number: 6765193
    Abstract: Optical touch switches are implemented based on the use of light total internal reflection and light scattering concepts. The optical touch switch basically consists of a light source, a light guide, a photodetector, and an electronic controller. The fingertip touching on the touching surface of the optical touch switch leads to the change in electrical current produced by the photodetector. As a result, the electronic control box senses this change of electrical current and allows the electrical load to stay at the desired state. Key advantages include ease of implementation, prevention of the light beam incident directly on the user's eyes, and ability to accept both strong and weak mechanical forces from users.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: July 20, 2004
    Assignee: National Science and Technology Development Agency
    Inventor: Sarun Sumriddetchkajorn
  • Optical touch switch structures
    Publication number: 20030052257
    Abstract: Optical touch switches are implemented based on the use of light total internal reflection and light scattering concepts. The optical touch switch basically consists of a light source, a light guide, a photodetector, and an electronic controller. The fingertip touching on the touching surface of the optical touch switch leads to the change in electrical current produced by the photodetector. As a result, the electronic control box senses this change of electrical current and allows the electrical load to stay at the desired state. Key advantages include ease of implementation, prevention of the light beam incident directly on the user's eyes, and ability to accept both strong and weak mechanical forces from users.
    Type: Application
    Filed: August 21, 2002
    Publication date: March 20, 2003
    Inventor: Sarun Sumriddetchkajorn