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Touch sensing for curved displays

  • US 9,857,915 B2
  • Filed: 05/19/2008
  • Issued: 01/02/2018
  • Est. Priority Date: 01/25/2008
  • Status: Active Grant
First Claim
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1. A display apparatus, comprising:

  • a diffuse spherical display that defines an interior region of the display apparatus, the diffuse spherical display having an interior surface, an exterior surface, and an aperture;

    a ring-like configuration of light emitters positioned around the aperture in the interior region of the display apparatus, the light emitters configured to emit infrared light through the interior region towards the interior surface of the diffuse spherical display, the infrared light passes through the interior surface and then passes through the exterior surface of the diffuse curved display;

    a wide-angle lens that is positioned inside the aperture and flush with the ring-like configuration of light emitters;

    a wavelength filter that is optically coupled to the wide-angle lens, wherein infrared light received by way of the wide-angle lens passes through the wavelength filter;

    an infrared camera that is optically coupled to the wavelength filter and the wide-angle lens, the infrared camera is configured to receive infrared light that passes through the wavelength filter; and

    a projector that is optically coupled to the wavelength filter, wherein the wavelength filter reflects visible light emitted from the projector through the wide-angle lens such that the visible light is displayed on the exterior surface of the diffuse spherical display, an optical path of the infrared light received by the wavelength filter and an optical path of the visible light reflected by the wavelength filter are in alignment.

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