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Display apparatus

  • US 6,295,042 B1
  • Filed: 06/05/1997
  • Issued: 09/25/2001
  • Est. Priority Date: 06/05/1996
  • Status: Expired due to Fees
First Claim
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1. A display apparatus, comprising:

  • a display panel having a display area (h×

    w) and cell gap (d) and including electrodes arranged in a matrix form and comprising a number (Nc) of scanning electrodes each having a resistance (Rt) and a capacitance (Ct), and a number of data electrodes;

    a circuit for generating a rectangular drive signal waveform supplied to the scanning electrodes and a data signal waveform supplied to the data electrodes, respectively, of the display panel; and

    a low-pass filter for recovering a frequency component exceeding a prescribed cut-off frequency (f) from the rectangular drive signal waveform to form a resultant drive signal waveform that is generally rectangular but with moderately sloped rising and falling portions, and applying the resultant drive signal waveform to inlet ends of the scanning electrodes in the display panel, wherein said cut-off frequency (f) is prescribed according to the following formula;

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