Electrovibration Haptic Signal Generator for Discreet Mobile Notifications

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Solution Overview

Problem

Existing communication systems for mobile devices often disrupt users with synchronous visual, auditory, or vibratory alerts, increasing cognitive load and making it difficult to discreetly check notifications without drawing attention.

Innovation Solution

A device with a haptic signal generator using a ground electrode and an actuated area, which outputs haptic signals only when touched, allowing users to retrieve messages as electrovibration patterns without mechanical vibration or visual cues, enabling asynchronous notification checking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If synchronous visual, auditory, or vibratory alerts are used to notify users of messages, then users can be immediately alerted to new events, but users experience increased cognitive load and distractions

Engineering Contradiction:

Improvenotification deliveryVSAvoidcognitive load

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces traditional mechanical vibration motors with electrovibration technology that uses electrical fields to generate haptic sensations on the touchscreen surface. This substitution allows for more nuanced haptic patterns and reduces the mechanical noise and distraction associated with traditional vibrators, while maintaining reliable notification delivery through distinctive electrovibration patterns.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the parameters of haptic feedback by using variable frequency, amplitude, and pattern electrovibration signals instead of simple on/off mechanical vibration. These parameter variations create distinctive notification patterns that are more discernible and less cognitively demanding, allowing users to quickly identify notification types without intensive processing.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If traditional mechanical vibration is used for haptic feedback, then users can feel notifications, but the vibrations are mechanically noticeable and distracting to others

Engineering Contradiction:

Improvenotification perceptionVSAvoidmechanical distraction

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The patent replaces mechanical vibration motors with an electrovibration system that uses electrical fields applied to the touchscreen surface to create haptic sensations. This eliminates the mechanical vibration source that distracts others, while maintaining user perception through direct electrovibration of the touch interface that users feel through their fingers.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If users must check notifications synchronously when alerts occur, then messages can be delivered immediately, but users cannot check messages at their convenience

Engineering Contradiction:

Improvemessage deliveryVSAvoidnotification checking flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent stores multiple haptic notification patterns in advance, each representing different message types or priorities. When a notification arrives, the appropriate pre-programmed electrovibration pattern is immediately activated, providing reliable delivery. Users can then check and clear notifications at their convenience by interacting with the device, combining immediate delivery with flexible user-paced processing.

Inventive Principle:

Principle #10Preliminary action

4Loss of information

If visual display is used to show missed messages, then users can see what messages were missed, but users must look at their phone which draws attention

Engineering Contradiction:

Improvemessage informationVSAvoidattention drawing

Core Design Contradiction:

Loss of informationVSObject-affected harmful factors

Solution Approach 1:

The patent uses electrovibration patterns to encode message information that users can perceive through tactile sensation rather than visual display. Different message types are represented by distinct electrovibration patterns (frequency, amplitude, duration variations) that users feel through their fingers on the touchscreen, eliminating the need to visually check the phone and draw attention.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 users to evaluate incoming messages discreetly and at their convenience, reducing distractions and cognitive load by providing a non-intrusive method to receive and process notifications.

Implementation Method 1

electrovibration, which may be more discreet than traditional vibration

Methodology Applied

Scientific EffectElectrovibration: Electrostatic Induction

Data Source

PatentUS11435829B2Communication device and method using haptic actuator

Publication Date: 2022.09.06 WEFT CO

AI summary

A device and method are provided to provide haptic signals when a user touches the device. In one embodiment, the haptic signal provided represents a summary of messages or notifications accumulated since the user last touched the device. In another embodiment, the haptic signal corresponds to the presence or absence of specific messages or persons attempting to contact the user. In another embodiment, the haptic signal corresponds to arbitrary input from a remote user. In another embodiment, the haptic signal corresponds to a user-authored mapping between a data source and the haptic signal.