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ANGULARLY-SELECTIVE SENSOR-IN-PIXEL IMAGE DETECTION

  • US 20110122071A1
  • Filed: 11/24/2009
  • Published: 05/26/2011
  • Est. Priority Date: 11/24/2009
  • Status: Active Grant
First Claim
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1. A display system configured for multi-touch input, the display system comprising:

  • a display surface;

    an image-producing display panel comprising;

    a plurality of sensor pixels positioned within a sensor layer of the image-producing display panel, andan angularly-selective layer positioned between the display surface and the sensor layer, the angularly-selective layer configured to transmit infrared light having a first range of incidence angles with a surface normal of the angularly-selective layer to a first sensor pixel of the sensor layer and to reflect infrared light having a second range of incidence angles from a second sensor pixel of the sensor layer, the second range of incidence angles being greater than the first range of incidence angles with respect to a surface normal of the sensor layer; and

    a local light source to illuminate the display surface with one or more wavelengths of infrared light.

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