Touch-Sensitive Mobile Device Cover for Button Accessibility

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Solution Overview

Problem

Mobile devices with protective covers often render non-display surfaces inaccessible, making tasks like volume adjustment and button operations cumbersome due to inaccessibility of physical buttons, especially on devices with touch-screens lacking physical buttons.

Innovation Solution

A touch-sensitive surface overlay on a mobile device cover that communicates touch inputs to the device, allowing for extended functionality by associating touch inputs with device functions, using technologies like RFID, NFC, or capacitive sensing, and powered by passive chips or batteries.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a protective cover is applied to the mobile device, then the device is protected from damage, but the physical buttons and surfaces become inaccessible

Engineering Contradiction:

Improvedevice protectionVSAvoidbutton accessibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

A touch-sensitive overlay is introduced as an intermediary layer between the user and the physical buttons. This overlay allows touch inputs to be transmitted through the protective cover to the underlying buttons, enabling button functionality to be accessed without removing the cover. The overlay acts as a mediator that bridges the gap between the protective cover and the physical interface.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces direct mechanical interaction with physical buttons through the cover with an electronic touch-sensing system. Instead of pressing buttons directly through the cover material, touch inputs are detected by capacitive or resistive sensors in the overlay, which then transmit digital signals to simulate button presses. This substitution of mechanical action with electronic sensing resolves the accessibility issue.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If a cover covers the entire surface of the mobile device, then protection is maximized, but functionality is reduced

Engineering Contradiction:

Improvedevice protectionVSAvoiddevice functionality

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The touch-sensitive overlay is configured with varying properties across different regions to match the underlying button layout and functionality. Areas corresponding to physical buttons have enhanced touch sensitivity or specific touch patterns configured, while other areas maintain standard protective cover properties. This localized differentiation allows the cover to provide both protection and functional access points.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The protective cover is designed to serve multiple functions simultaneously: physical protection, touch input detection, and button functionality access. By integrating touch-sensitive capabilities into the cover itself, the same component that provides protection also enables interaction, eliminating the need for separate input mechanisms and maximizing the utility of the covered surface.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If physical buttons are made inaccessible by the cover, then protection is improved, but operational efficiency decreases

Engineering Contradiction:

Improvedevice protectionVSAvoidtask completion efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The touch-sensitive overlay serves as a mediator that enables efficient task completion without compromising protection. Users can perform operations like volume adjustment, camera control, and other button functions by touching the overlay at corresponding locations, which transmits the input to the underlying buttons. This maintains operational efficiency while the cover remains in place for protection.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 the use of mobile device surfaces covered by protective covers for various functions, enhancing usability and accessibility without compromising protection, by interpreting touch inputs as device commands.

Implementation Method 1

using technologies like RFID, NFC, or capacitive sensing

Methodology Applied

Scientific EffectCapacitive sensing: Capacitance

Implementation Method 2

using technologies like RFID, NFC, or capacitive sensing

Methodology Applied

Scientific EffectResistive sensing: Electrical Resistance

Implementation Method 3

using technologies like RFID, NFC, or capacitive sensing

Methodology Applied

Scientific EffectRFID: Electromagnetic Induction

Implementation Method 4

using technologies like RFID, NFC, or capacitive sensing

Methodology Applied

Scientific EffectNFC: Electromagnetic Induction

Data Source

PatentUS10055061B2Extending the functionality of a mobile device

Publication Date: 2018.08.21 AT&T INTELLECTUAL PROPERTY I L P

AI summary

Devices, systems, and methods are disclosed for extending the functionality of a mobile device by including a cover for the mobile device with a substantial portion of the exterior overlaid with a touch-sensitive surface. Logic stored on the cover senses a user's touch on the touch-sensitive surface and transmits the touch input to the coupled mobile device. Logic stored on the coupled mobile device may receive and interpret the touch input as a function or command of an operating system, or a function or command of a program within the operating system of the mobile device.