Patents by Inventor Jean Van Den Steen

Jean Van Den Steen 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).

  • Refresh pixel circuit for active matrix
    Patent number: 7423619
    Abstract: The present invention provides an array of pixels, each pixel comprising: a pixel element, a pixel refresh circuit, a first memory element and a first switch element. Each pixel element comprises a first pixel electrode for individual control of the pixel element and a second pixel electrode, the second pixel electrode linking substantially all pixel elements in the array and being connected to a common counter-electrode. The first and second pixel electrode form a first capacitor. The pixel element has a threshold voltage and a modulation voltage. The pixel refresh circuit is intended for transferring electric charge related to a pixel data value from a data input of the pixel to the first pixel electrode via a charge transfer path. The first memory element is coupled to the pixel data input for storing electric charge related to the pixel data value.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: September 9, 2008
    Assignee: Gemidis N.V.
    Inventors: Herbert De Smet, Jean Van Den Steen, Geert Van Doorselaer, André Van Calster
  • Refresh pixel circuit for active matrix
    Publication number: 20060007192
    Abstract: The present invention provides an array of pixels, each pixel comprising: a pixel element, a pixel refresh circuit, a first memory element and a first switch element. Each pixel element comprises a first pixel electrode for individual control of the pixel element and a second pixel electrode, the second pixel electrode linking substantially all pixel elements in the array and being connected to a common counter-electrode. The first and second pixel electrode form a first capacitor. The pixel element has a threshold voltage and a modulation voltage. The pixel refresh circuit is intended for transferring electric charge related to a pixel data value from a data input of the pixel to the first pixel electrode via a charge transfer path. The first memory element is coupled to the pixel data input for storing electric charge related to the pixel data value.
    Type: Application
    Filed: June 24, 2003
    Publication date: January 12, 2006
    Inventors: Herbert De Smet, Jean Van Den Steen, Geert Van Doorselaer, Andre Van Calster