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Method and Apparatuses of Transparent Fingerprint Imager Integrated with Touch Display Device

  • US 20140218327A1
  • Filed: 02/04/2013
  • Published: 08/07/2014
  • Est. Priority Date: 04/29/2012
  • Status: Active Grant
First Claim
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1. A transparent fingerprint imaging apparatus comprises,a plurality of column lines wherein each column line is coupled with a collection of fingerprint capacitance sensing cells;

  • a plurality of scan lines wherein each scan line is coupled with a collection of fingerprint capacitance sensing cells;

    a plurality of data lines wherein each data line is coupled with a collection of fingerprint capacitance sensing cells; and

    a plurality of fingerprint capacitance sensing cells wherein each fingerprint capacitance sensing cell further comprises, a fingerprint capacitor comprising a transparent capacitance detecting electrode and a transparent capacitance-detecting dielectric layer, a transparent reference capacitor coupled with said fingerprint capacitor with one electrode connecting to the fingerprint capacitor, a transparent TFT (thin-film transistor) wherein said transparent TFT with one terminal connecting to a scan line and another terminal connecting to a column line, and an amplification transparent TFT (thin-film transistor) wherein the gate electrode of the amplification transparent TFT connects to the transparent capacitance detecting electrode, one terminal of said amplification transparent TFT connects to a data line and the other terminal connects to a scan line.

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