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US 9,068,845 B2Granted
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
Life of this patent
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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.
Claims37
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 comprising a filter to selectively eliminate certain wavelength of radiation;
- 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
A digitizer system comprising:
- a substrate with position-unique photoluminescent indicia, the substrate comprising a color filter of an electronically addressable display;
- 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
A digitizer system comprising:
- a substrate with position-unique photoluminescent indicia luminescing upon exposure to radiation within a first wavelength range;
- a stylus comprising an optical image sensor configured to sense the photoluminescent indicia;
- and
- an electronically addressable display comprising a radiation source that provides excitation radiation that includes at least some wavelengths within the first wavelength range.
1 more element
A digitizer system comprising:
- a substrate with position-unique photoluminescent indicia luminescing upon exposure to radiation within a first wavelength range;
- a stylus comprising an optical image sensor configured to sense the photoluminescent indicia;
- a radiation source that provides excitation radiation that includes at least some wavelengths within the first wavelength range;
- and
- a processor configured to receive signals from the optical image sensor and provide location-specific positional signals based on the received signals, wherein the processor is configured to sense the photoluminescent indicia when the radiation source is off.
2 more elements
Dependencies are inferred from the claim text.