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LCD touchscreen panel with scanning backlight

  • US 20080055494A1
  • Filed: 09/05/2006
  • Published: 03/06/2008
  • Est. Priority Date: 09/05/2006
  • Status: Active Grant
First Claim
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1. A liquid crystal display (LCD) device, comprising:

  • a casing;

    a transparent touchscreen surface held into place by the casing;

    a liquid crystal (LC) layer disposed within the casing behind the touchscreen surface; and

    at least one probe light sensor disposed within the casing behind the LC layer and configured to detect light transmitted through the touchscreen surface,wherein the probe light sensor is configured to detect user contact with a touchscreen key based on a light sensing operation.

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