Power-Efficient Stylus Non-Linear Circuitry ESD Protection

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Solution Overview

Problem

Existing styluses for electronic devices either require power-intensive electronics or are difficult to distinguish from a user's finger, leading to inefficiencies and inaccuracies in interaction with electronic devices.

Innovation Solution

A power-efficient stylus with electrostatic discharge protection, featuring non-linear circuitry that provides a non-linear load between the body circuitry and the front tip interface component, allowing for precise detection by electronic devices without the need for internal power sources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If an active stylus with power intensive electronics is used, then the stylus can be distinguished from a user's finger and provide precise interaction, but the power consumption increases

Engineering Contradiction:

Improvedetection precisionVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The stylus uses the electrical signal transmitted by the electronic device to stimulate its non-linear circuitry, which then generates a detectable response signal. This self-service mechanism eliminates the need for internal power sources while maintaining detection precision through the unique non-linear load signature.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The non-linear circuitry changes the electrical parameters (impedance, capacitance, inductance) of the stylus in response to the transmitted signal, creating a distinctive non-linear load that allows precise identification and differentiation from a finger touch without requiring active power consumption.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If a passive stylus is used, then the power consumption is reduced, but the stylus is difficult to distinguish from a user's finger

Engineering Contradiction:

Improvepower consumptionVSAvoiddetection precision

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The patent replaces the traditional passive mechanical stylus with an electrical system that uses non-linear circuitry to generate a detectable electrical response. This substitution allows the stylus to maintain passive power characteristics while achieving active-level detection precision through electrical signal processing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The non-linear circuitry acts as an intermediary between the transmitted electrical signal and the detection system, transforming the incoming signal into a modulated response that carries identification information, enabling distinction from a finger without requiring internal power sources.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If non-linear circuitry is used to provide a detectable signal, then the stylus can be precisely detected without internal power sources, but the circuitry becomes vulnerable to electrostatic discharge damage

Engineering Contradiction:

Improvepower efficiencyVSAvoidelectrostatic discharge protection

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

ESD protection circuitry is integrated into the stylus design before deployment, providing preemptive protection against electrostatic discharge events. This cushioning approach ensures the non-linear circuitry remains vulnerable-free while maintaining power efficiency, allowing the stylus to operate reliably in various electrostatic environments.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Reliability

If ESD protection circuitry is added to the stylus, then the reliability against electrical surges is improved, but the device complexity increases

Engineering Contradiction:

Improveelectrostatic discharge protectionVSAvoidcircuit complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The ESD protection circuitry is merged with the existing non-linear circuitry and tip interface components, sharing common structural and electrical pathways. This integration approach provides comprehensive ESD protection while minimizing the addition of separate components, thereby limiting the increase in overall device complexity.

Inventive Principle:

Principle #5Merging (Combining)

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

The stylus achieves power efficiency and precise interaction with electronic devices, while providing electrostatic discharge protection to prevent damage from sudden electrical surges.

Implementation Method 1

the non-linear load is operative to provide a stylus electric field that is detectable by the electronic device when the front tip interface component of the stylus is positioned adjacent the input surface

Methodology Applied

Scientific EffectElectrostatic field: Electric Field

Implementation Method 2

the stylus is operative to drive a current back and forth through the tip stylus circuitry when the tip stylus circuitry is stimulated by an electrical signal provided by the input component

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12210696B2Electrostatic discharge protection of a power efficient stylus for an electronic device

Publication Date: 2025.01.28 SHAPIRTEN LABORATORIES LLC

AI summary

Systems, methods, and computer-readable media for enabling a power efficient stylus for an electronic device are provided. Various components may be provided for providing electrostatic discharge protection of such a stylus.