Touchscreen Testing via Grounded Conductor Switching

Solution Overview

Problem

Conventional techniques for testing touchscreen devices are often inaccurate and difficult to reproduce, leading to unreliable results that can hinder user interaction with computing devices.

Innovation Solution

A conductor, such as a piece of metal, is positioned proximal to a touchscreen device and alternates between grounded and ungrounded states to simulate user touch and non-touch events, using an electrical switch to emulate finger contact without physical movement, allowing for precise testing of touchscreen functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional testing techniques are used, then the testing process is simple, but the measurement precision and reliability are poor

Engineering Contradiction:

Improvetouchscreen testing accuracyVSAvoidtesting apparatus complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces manual mechanical touch testing with an automated electrical switching system. A conductor connected through an electrical switch emulates finger contact, eliminating the need for physical human interaction during testing. This substitution dramatically improves measurement precision while maintaining manageable device complexity through automation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a conductor as an intermediary element between the testing system and the touchscreen. This conductor, controlled by an electrical switch, serves as a precise mediator that can be reliably positioned and electrically controlled to simulate various touch conditions, thereby improving testing accuracy without requiring complex mechanical positioning systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If manual touch testing is performed, then the device complexity is low, but the reliability and reproducibility of test results are poor

Engineering Contradiction:

Improvetest result reproducibilityVSAvoidtesting system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces manual mechanical touch operations with an electrical switching mechanism. The electrical switch provides reliable, reproducible on/off states that consistently emulate human touch and non-touch conditions. This mechanical-to-electrical substitution ensures high test result reliability while keeping the overall system complexity manageable through the use of standard electrical components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The testing system performs self-testing through the automated electrical switch that can independently control the conductor's contact state with the touchscreen. This self-service capability eliminates the need for external manual operation during testing, thereby improving reliability and reproducibility without proportionally increasing system complexity.

Inventive Principle:

Principle #25Self-service

3Measurement precision

If a conductor is used to simulate touch, then the measurement precision improves, but the ease of operation decreases due to electrical switch control

Engineering Contradiction:

Improvetouch detection accuracyVSAvoidtesting operation simplicity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent replaces manual mechanical touch operations with an electrical switching mechanism. The electrical switch provides reliable, reproducible on/off states that consistently emulate human touch and non-touch conditions. This mechanical-to-electrical substitution ensures high test result reliability while keeping the overall system complexity manageable through the use of standard electrical components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The testing system performs self-testing through the automated electrical switch that can independently control the conductor's contact state with the touchscreen. This self-service capability eliminates the need for external manual operation during testing, thereby improving reliability and reproducibility without proportionally increasing system complexity.

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method provides accurate and reproducible testing of touchscreen devices, ensuring they meet intended performance standards and enhancing user interaction by eliminating inaccuracies in touch detection.

Implementation Method 1

A user, for instance, may interact with a graphical user interface by inputting a gesture using the user's hand that is detected by the touchscreen display... simulating a touch of a user by placing the conductor in a grounded state and lack of a touch by the user by placing the conductor in an ungrounded state

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS8988087B2Touchscreen testing

Publication Date: 2015.03.24 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

Touchscreen testing techniques are described. In one or more implementations, a conductor is placed proximal to a touchscreen device and the touchscreen device is tested by simulating a touch of a user by placing the conductor in a grounded state and lack of a touch by the user by placing the conductor in an ungrounded state.