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Display apparatus with improved sensing speed of resolution change and sensing method thereof

  • US 6,822,660 B2
  • Filed: 07/30/2001
  • Issued: 11/23/2004
  • Est. Priority Date: 04/06/2001
  • Status: Expired due to Term
First Claim
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1. A display apparatus for displaying a picture signal synchronized with a synchronization signal provided from a host, the display apparatus comprising:

  • a counting circuit for counting a first number of pulses of the synchronization signal provided from the host, and generating a counted number of pulses in a predetermined time period;

    a register for storing the first number of the pulses provided from the counting circuit; and

    a comparator for comparing a second number of pulses newly provided from the counting circuit with the first number of pulses stored in the register, and generating a resolution change sensing signal when the first number of pulses and the second number of pulses are different, wherein the counting circuit comprises a counter for counting the number of pulses of the synchronization signal and the counter is reset by a control signal from the comparator, and wherein the synchronization signal is a horizontal synchronization signal.

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