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Active matrix type display apparatus method for driving the same, and display element

  • US 6,963,335 B2
  • Filed: 06/11/2001
  • Issued: 11/08/2005
  • Est. Priority Date: 06/16/2000
  • Status: Expired
First Claim
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1. A display apparatus, comprising:

  • a plurality of pixel electrodes arranged in a matrix;

    switching elements connected thereto;

    scanning electrodes;

    video signal electrodes;

    common electrodes;

    a counter electrode;

    a display medium interposed between the pixel electrodes and the counter electrode; and

    storage capacitance formed between the pixel electrodes and the common electrodes,wherein, in a case where a scanning electrode-pixel electrode capacitance between the pixel electrodes and the scanning electrodes is represented by Cgd, a common electrode-pixel electrode capacitance between the pixel electrodes and the common electrodes is represented by Cst, and a total capacitance connected electrically to the pixel electrodes is represented by Ctot, α

    gd and α

    st represented by
    α

    gd=Cgd/Ctot, α

    st=Cst/Ctot



    (Formula

         1)  

    are set to be different values between a portion close to feeding ends in a screen and a portion away therefrom, and an area of overlapping portions between the scanning electrodes and the pixel electrodes, and an area of overlapping portions between the common electrodes and the pixel electrodes are set to be larger in a screen center portion farthest from the feeding ends than in a screen end portion closest to the feeding ends, so that α

    gd and α

    st are both larger in the screen center portion farthest from the feeding ends than in the screen end portion closest to the feeding ends.

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