Conductive Button Overlay for Glove-Friendly Touchscreens

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Solution Overview

Problem

Capacitive touch surfaces require direct contact with a conductive object, such as a bare finger, which can be impractical or unsafe in certain environments and lack tactile feedback.

Innovation Solution

A device with conductive buttons or dials that mimic finger contact, allowing operation of capacitive touch surfaces without direct skin contact, using conductive materials like elastomers to actuate the touch surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If capacitive touch surfaces require direct contact with a conductive object (bare finger), then the touch surface can be operated, but it becomes impractical or unsafe in environments where gloves are worn or protective equipment is required

Engineering Contradiction:

Improveoperability in various environmentsVSAvoiddirect contact requirement

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent introduces a button with conductive material as an intermediary between the user and the capacitive touch surface. The button includes a conductive element that contacts the touch surface to simulate finger contact, while the user interacts with the button's outer surface. This mediator enables operation in environments where direct skin contact is impractical or unsafe.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Shape

If capacitive touch surfaces are used to provide a sleek and modern interface, then the aesthetic appeal is improved, but tactile feedback is lost compared to physical buttons and dials

Engineering Contradiction:

Improvesleek interface designVSAvoidtactile feedback

Core Design Contradiction:

ShapeVSEase of operation

Solution Approach 1:

The patent merges the aesthetic advantages of capacitive touch surfaces with the tactile benefits of physical buttons. The button assembly combines a physical structure that provides tactile feedback during pressing with a conductive element that interfaces with the capacitive touch surface, thereby combining the sleek interface design with tactile operability.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If conductive material is positioned between the first surface and the second surface of the button, then the capacitive touch surface can be actuated, but the button structure becomes more complex

Engineering Contradiction:

Improvetouch surface actuation capabilityVSAvoidbutton internal structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent employs a thin conductive layer or conductive coating on the button structure to enable capacitive actuation. This approach minimizes the addition of complex internal components while still providing the necessary conductive pathway to interact with the capacitive touch surface, thereby reducing structural complexity compared to using bulky conductive elements.

Inventive Principle:

Principle #30Flexible shells and thin films

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

Enables operation of capacitive touch surfaces with gloves on and provides tactile feedback, enhancing usability and safety in various environments.

Implementation Method 1

Capacitive touch surfaces operate based on the principle of capacitive sensing, which detects changes in an electrical field caused by the proximity or contact of a conductive object

Methodology Applied

Scientific EffectCapacitive sensing: Capacitance

Implementation Method 2

an array of capacitive sensors is embedded beneath the surface of the screen or pad. Each sensor is capable of detecting changes in capacitance caused by the approach or touch of a conductive object

Methodology Applied

Scientific EffectElectrical field detection: Electric Field

Data Source

PatentUS20260064214A1Touchscreen actuating devices, and systems, and methods comprising same

Publication Date: 2026.03.05 NOTT CO

AI summary

A device is configured for use with a capacitive touch surface. The device includes at least one button, the at least one button including a first surface that is configured to contact the capacitive touch surface and a second surface opposite the first surface along a first axis. The at least one button is configured so that application of a force against the second surface causes the first surface to move from a first position in a first direction along the first axis and release of the force permits the first surface to return to the first position. The at least one button further includes a conductive material that is sufficient to actuate the capacitive touch surface upon contact between the conductive material and the capacitive touch surface. The conductive material is positioned between the first surface and the second surface.