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US 9,791,977 B2Granted
Transient deformation detection for a touch-sensitive surface
AssigneeRapt IP Limited
InventorOwen Drumm
Life of this patent
Estimating the term…
Abstract
An optical touch-sensitive device detects touch events caused by objects (e.g., pens, styluses, fingers) and determines a touch type for the touch event based on analyzing a deformation wave caused by the touch event.
Claims23
A method for determining a touch type for a touch event by an object on a touch-sensitive surface, the touch-sensitive surface having emitters and detectors arranged around its periphery, the emitters producing optical beams received by the detectors, the touch event disturbing the optical beams, the method comprising:
- receiving a location of the touch event;
- receiving information indicating disturbances of the optical beams;
- analyzing the received information to determine a touch type for the touch event, the analysis based on the location of the touch event and on propagation of a deformation wave along the touch-sensitive surface, the deformation wave caused by landing of the object on the touch-sensitive surface, wherein the deformation wave disturbs the optical beams and different touch types cause different deformation waves.
Dependencies are inferred from the claim text.