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Energy-efficient touch panel device and related method

  • US 9,001,071 B2
  • Filed: 01/15/2012
  • Issued: 04/07/2015
  • Est. Priority Date: 02/23/2009
  • Status: Active Grant
First Claim
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1. An energy-efficient touch panel control method comprising:

  • transforming a plurality of analog output voltages into a plurality of digital trace data according to a plurality of capacitive load parameters by an analog to digital conversion unit;

    storing the plurality of the digital trace data into a buffer memory; and

    controlling operating modes of the analog to digital conversion unit and an operation unit according to a data number of the data stored in the buffer memory;

    wherein the analog to digital conversion unit is operated in a sleep mode, and the operation unit is operated in an active mode when the data number is greater than or equal to a predefined value, such that the operation unit processes the data stored in the buffer memory; and

    wherein the analog to digital conversion unit is operated in an active mode, and the operation unit is operated in a sleep mode, after the operation unit completes processing the data stored in the memory buffer.

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