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US 10,761,670 B2Granted
Sensing of multiple writing instruments
AssigneeTactual Labs Co.
InventorBraon Moseley
Life of this patent
Estimating the term…
Abstract
A whiteboard or other surface has sensors located with respect to the whiteboard or opaque surface so that interaction with the whiteboard or other surface with a writing implement is detected by the sensors located beneath the surface. The electrical properties of the inks interact with the signals transmitted and received by the conductors. These changes are measured and used to reproduce marks made by the writing implements, to store the marks made for later reproduction, or to display contemporaneously with the writing upon the surface.
Claims18
A device comprising:
- a touch panel comprising a first plurality of conductors operably connected to a signal generator, wherein the signal generator is adapted to generate a plurality of frequency orthogonal signals, wherein the plurality of frequency orthogonal signals are transmitted on each of the first plurality of conductors, a second plurality of conductors operably connected to a signal processor, wherein measurements of the plurality of frequency orthogonal signals received on the second plurality of conductors are processed by the signal processor;
- a whiteboard surface disposed on top of the touch panel, wherein the whiteboard surface is adapted to receive and reproduce markings made on the whiteboard surface using a marker, wherein the markings made on the whiteboard surface have properties that affect the measurements of the plurality of frequency orthogonal received on the second plurality of conductors of the touch panel;
- and
- wherein the properties that affect the measurements of the plurality of frequency orthogonal signals have different electrically reactive properties, wherein different colors of markings have different electrically reactive properties and the touch panel is adapted to distinguish between the different colors of markings based on the different electrically reactive properties.
1 more element
A device comprising:
- a touch panel comprising a first plurality of conductors operably connected to a signal generator, wherein the signal generator is adapted to generate a plurality of frequency orthogonal signals, wherein the plurality of frequency orthogonal signals are transmitted on each of the first plurality of conductors, a second plurality of conductors operably connected to a signal processor, wherein measurements of the plurality of frequency orthogonal signals received on the second plurality of conductors are processed by the signal processor;
- an opaque surface disposed on top of the touch panel, wherein the opaque surface is adapted to receive and reproduce markings made on the opaque surface using a writing implement, wherein the markings made on the opaque surface have properties that affect the measurements of the plurality of frequency orthogonal received on the second plurality of conductors of the touch panel;
- and
- wherein the properties that affect the measurements of the plurality of frequency orthogonal signals have different electrically reactive properties, wherein different markings have different electrically reactive properties and the touch panel is adapted to distinguish between the different colors of markings based on the different electrically reactive properties.
1 more element
Dependencies are inferred from the claim text.