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Image sensor with photosensitive thin film transistors and dark current compensation

  • US 20030205662A1
  • Filed: 06/09/2003
  • Published: 11/06/2003
  • Est. Priority Date: 02/20/2002
  • Status: Active Grant
First Claim
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1. An image sensor for sensing received image, comprising:

  • a substrate;

    a photo TFT disposed on the substrate to generate a photocurrent responsive to the received image, the photo TFT including, a gate electrode, a source electrode coupled to the gate electrode, a drain electrode, and a semiconductor layer coupled to the source and drain electrodes; and

    a reference TFT disposed on the substrate and coupled to the photo TFT, the reference TFT having dimensions substantially similar to the photo TFT and providing a compensating dark current, the reference TFT including, a gate electrode, a source electrode coupled to the gate electrode, a drain electrode, and a semiconductor layer coupled to the source and drain electrodes.

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