×

Display and method for driving the display

  • US 8,803,838 B2
  • Filed: 01/09/2014
  • Issued: 08/12/2014
  • Est. Priority Date: 07/17/2008
  • Status: Active Grant
First Claim
Patent Images

1. A display, comprising:

  • an electro-optical material arranged between first and second planes facing each other;

    a first substrate arranged on the first plane and including a conductor that affords an electrical signal to the electro-optical material;

    a second substrate arranged on the second plane and including a first electrically conductive film that affords an electrical signal to the electro-optical material;

    a second electrically conductive film arranged outside an area sandwiched between a plane of the first substrate, on which the electro-optical material is not arranged, and a plane of the second substrate, on which the electro-optical material is not arranged;

    a current detection circuit that detects a current on the second electrically conductive film;

    a control circuit that, during a first time period the current is detected by the current detection circuit, applies a voltage with substantially the same amplitude and phase as that applied to the second electrically conductive film to one of the conductor extending from inside to outside of a viewing area and the first electrically conductive film, and sets the other in a floating state, or applies a voltage with substantially the same amplitude and phase as that applied to the second electrically conductive film to both the conductor extending from inside to outside of a viewing area and the first electrically conductive film; and

    a detecting unit that detects, based on the current detected by the current detection circuit, whether or not touch has been made by a finger or a pointer and where the touch has been made, whereinthe floating means that an impedance value between the conductor extending from inside to outside of a viewing area and a voltage source connected thereto during the first time period is higher than that during a second time period other than the first time period, or an impedance value between the first electrically conductive film and a voltage source connected thereto during the first time period is higher than that during the second time period.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×