Universal Touchscreen Stylus Interface for Multi-Technology Compatibility

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Solution Overview

Problem

Current touchscreen stylus technologies are proprietary and incompatible across different systems, leading to an inferior user experience when switching between various touchscreen technologies.

Innovation Solution

A touchscreen stylus with a force sensing module, tilt sensing module, and communications module that can transmit data wirelessly to a computing apparatus, allowing it to function across different touchscreen technologies like PCAP, InGlass, and EMR without hardware modifications to the display module.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If proprietary stylus tip design and communication protocols are used, then each touchscreen stylus can support its own touchscreen/stylus technology, but the stylus cannot be used in other touchscreen/stylus technologies

Engineering Contradiction:

Improvestylus compatibilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The stylus is designed with a universal interface that can work with multiple touchscreen technologies (PCAP, InGlass, EMR) through a single standardized connection mechanism. The stylus includes a tip with force sensing module, tilt sensing module, and communications module that can interface with different touchscreen types without requiring proprietary adapters or modifications to the display module.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

A communications module serves as an intermediary between the stylus and the display module, translating and transmitting data regardless of the specific touchscreen technology used. This intermediary layer enables compatibility across different systems without requiring changes to either the stylus or the display module hardware.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If hardware modifications are made to the display module to support different touchscreen technologies, then compatibility is achieved, but the display module requires modifications

Engineering Contradiction:

Improvetouchscreen technology compatibilityVSAvoiddisplay module modification

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The communication and interface functionality is extracted from the display module and placed in the stylus itself. The stylus contains the communications module that handles all protocol translation and data transmission, leaving the display module unchanged and simplifying manufacturing while achieving multi-technology compatibility.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The stylus is designed as a universal interface device that can connect to any touchscreen technology without requiring modifications to the display module. The standardized design allows the same stylus hardware and software to work across PCAP, InGlass, and EMR systems.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If multiple proprietary styluses are used for different touchscreen systems, then each system gets optimized performance, but user experience deteriorates when switching between systems

Engineering Contradiction:

Improvesystem performanceVSAvoiduser experience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The stylus provides consistent performance across different touchscreen systems through a universal interface design. Users experience improved ease of operation by using the same stylus on different devices without needing to reconfigure or switch between proprietary styluses, while maintaining reliable performance through standardized communication protocols.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 seamless interaction and data transmission between the stylus and various touchscreen technologies, providing a unified user experience across different devices and systems.

Implementation Method 1

The force sensing module includes an electromagnet (EM) pressure sensing module

Methodology Applied

Scientific EffectElectromagnetic pressure sensing: Electromagnetic Induction

Implementation Method 2

The force sensing module includes an optical pressure sensing module

Methodology Applied

Scientific EffectOptical pressure sensing: Photoelectric Effect

Implementation Method 3

The tilt sensing module includes an accelerometer

Methodology Applied

Scientific EffectAccelerometer sensing: Accelerometer

Implementation Method 4

The tip is a conductive tip, and the touchscreen is a projected capacitive (PCAP) touchscreen

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS10928946B2Touchscreen stylus and display module interface

Publication Date: 2021.02.23 DELL PROD LP

AI summary

A touchscreen stylus, including a tip, including: a force sensing module to identify an analog force signal of the touchscreen stylus with respect to a touchscreen; a tilt sensing module to identify an analog tilt signal of the touchscreen stylus with respect to the touchscreen; a body, including: a mixer computing module to combine the analog force signal and the analog tilt signal to generate a combined analog signal; an analog-to-digital converter (ADC) to convert the combined analog signal to a combined digital signal; and a communications module to transmit the combined digital signal.