Interaction Device Spatial Error Correction

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Solution Overview

Problem

Analog and/or digital interaction devices, such as direct touch digitizers, touchpad digitizers, and air-based gesturing digitizers, suffer from inherent spatial error and jitter, which affect the accuracy of user interaction experiences due to limitations in sensor types and layouts, becoming more noticeable as detection areas expand.

Innovation Solution

A method to correct spatial error and jitter by learning and applying correction parameters, which are encrypted and stored on the interaction device, allowing authorized computing devices to decrypt and apply these parameters to improve positional accuracy, thereby enhancing the user interaction experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If sensor types and layouts are used to detect input position, then detection area can be expanded, but spatial error and jitter increase

Engineering Contradiction:

Improvedetection areaVSAvoidspatial accuracy

Core Design Contradiction:

Area of stationary objectVSMeasurement precision

Solution Approach 1:

The patent applies parameter changes by transforming raw sensor data through mathematical models and correction parameters. The system changes the parameters of position representation from raw sensor coordinates to corrected display coordinates, thereby improving measurement precision while maintaining large detection area.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the direct mechanical mapping between sensor layout and display position with a computational system. Instead of relying solely on physical sensor arrangement to determine position accuracy, the system uses software-based correction algorithms to substitute for the limitations of the physical sensor system.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If correction parameters are stored encrypted on interaction device, then security is improved, but device complexity increases

Engineering Contradiction:

ImprovesecurityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-computing and storing correction parameters on the interaction device before actual use. The correction parameters are prepared in advance and stored in encrypted form, so that when the device connects to a computing device, the correction is already available without requiring complex real-time computation or external authentication infrastructure.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3011413B1Interaction device corrective parameters

Publication Date: 2019.10.23 MICROSOFT TECHNOLOGY LICENSING LLC

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AI summary

The techniques described herein are directed to receiving parameters directed to correcting spatial error and/or jitter associated with an interaction device connected to a computing device. In some instances, the parameters are encrypted parameters that may be decrypted and consumed to correct the spatial error and/or the jitter associated with the interaction device. For instance, the parameters may provide an adjustment to one or more reported positions of input received from a detection area of the interaction device, so that a display position more accurately reflects, based on the adjustment, an actual position of input on the detection area of the interaction device.