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US 2013/0153787 A1Published application
Optical digitizer system with position-unique photoluminescent indicia
Assignee3M Innovative Properties Company
InventorsBernard O. GEAGHAN, Michael Benton FREE, Edward S. HAGERMOSER, Rachael P. MARINO, Pradnya V. NAGARKAR, Martin B. WOLK
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Abstract
A digitizer system including a substrate having a position-unique photoluminescent indicia pattern. A stylus component receives optical signals indicative of the indicia pattern and determines therefrom the position of the stylus relative to the substrate. Methods of disposing indicia on the substrate, and styli suitable for sensing photoluminescent indicia are also described.
Claims73
A digitizer system comprising:
- a substrate with position-unique photoluminescent indicia;
- a stylus comprising an optical image sensor configured to sense the photoluminescent indicia;
- and,
- a processor configured to receive signals from the optical image sensor and provide location-specific positional signals based on the received signals.
1 more element
An article comprising:
- a substrate having position-unique photoluminescent indicia.
A method comprising:
- disposing position-unique photoluminescent indicia on a substrate, wherein the photoluminescent indicia define local regions of the substrate.
A stylus for a digitizer system comprising:
- a radiation source providing excitation radiation in a first wavelength range;
- and,
- a sensor having a filter that limits passage of radiation substantially in the first wavelength range.
Dependencies are inferred from the claim text.