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Touch display device and driving method thereof

  • US 9,874,970 B2
  • Filed: 03/18/2016
  • Issued: 01/23/2018
  • Est. Priority Date: 10/21/2015
  • Status: Active Grant
First Claim
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1. A touch display device, comprising:

  • a first substrate;

    a second substrate;

    a display medium layer, disposed between the first substrate and the second substrate;

    a pixel array structure, disposed between the second substrate and the display medium layer, and comprising a plurality of pixel electrodes and a multi-function electrode layer overlapping with the pixel electrodes and being deposed over the second substrate; and

    a pressure sensing electrode layer, disposed over the first substrate to be opposite to and parallel to the multi-function electrode layer, and a changeable gap being formed between the pressure sensing electrode layer and the multi-function electrode layer;

    wherein the multi-function electrode layer comprises a plurality of independent multi-function electrodes each being capable of being independently charged or discharged such that the multi-function electrode layer has capability of performing self-capacitive touch sensing and pressure touch sensing; and

    wherein signals of the pressure sensing electrode layer and the multi-function electrode layer are allowed to be synchronized.

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