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System and methods for calibrating a digitizer system

  • US 9,958,954 B2
  • Filed: 12/13/2012
  • Issued: 05/01/2018
  • Est. Priority Date: 12/13/2012
  • Status: Expired due to Fees
First Claim
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1. A method of calibrating a digitizer system having a substrate with photoluminescent indicia that uniquely identify local areas of a substrate, with a display, the method of calibrating the digitizer system with the display comprising:

  • providing a processor communicatively coupled to the display and an electronic sensing device, wherein the processor is adapted to control images displayed on the display, wherein the processor causes a first localized area of the display to radiate, and wherein the electronic sensing device is a stylus having a field-of-view and comprising different first and second light sources, the stylus being configured to operate in a plurality of modes, the plurality of modes comprising;

    a first mode for reading photoluminescent indicia wherein the first light source is turned off and the second light source is turned on;

    a second mode for reading light absorbing indicia on a light diffusing or reflective substrate wherein the first light source is turned on and the second light source is turned off; and

    a third mode for reading indicia displayed on the display wherein the first and second light sources are turned off; and

    receiving, into the electronic sensing device, radiation from the first localized area of the display and radiation emitted from a photoluminescent indicium associated with the first localized area.

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