Active Stylus Rigid Abutting Element Eliminates Idle Operations
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Solution Overview
Problem
Existing active styluses with conductive rubber tips often experience insufficient deformation, leading to idle operations and a poor user experience due to fragmented structural configurations, which affect the overall strength and responsiveness.
Innovation Solution
An active stylus design featuring a pen core module with an elastic member that seamlessly abuts a force sensing element, eliminating idle operations by using a rigid abutting element and a coil-rod elastic member configuration, ensuring direct pressure transfer without the need for additional force, and incorporating a capacitive MEMS force sensing element for precise pressure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive rubber is used on the pen tip to press against the force sensing element, then the stylus can generate touch signals, but the conductive rubber often experiences insufficient deformation leading to idle operations and poor user experience
Solution Approach 1:
The patent removes the conductive rubber component from the stylus tip and replaces it with a rigid abutting element. This extraction of the problematic conductive rubber eliminates the idle operation issue while maintaining the ability to press against the force sensing element for reliable touch signal generation.
Solution Approach 2:
The patent changes the material parameter from flexible conductive rubber to rigid abutting element material. This parameter change ensures sufficient deformation and direct pressure transfer to the force sensing element, eliminating the fragmented configuration and idle operations while improving structural strength.
2Ease of operation
If conductive rubber is used with fragmented structural configuration, then the stylus can operate, but the overall structural strength is reduced
Solution Approach 1:
By removing the conductive rubber and using a rigid abutting element instead, the patent eliminates the fragmented structural configuration. The rigid element provides continuous structural support from the pen tip through the core to the force sensing element, significantly improving overall structural strength while maintaining operation capability.
3Reliability
If conductive rubber is pressed against the force sensing element, then touch signals can be generated, but idle operations occur in the touching path
Solution Approach 1:
The patent extracts and removes the conductive rubber component that causes idle operations. The rigid abutting element directly transmits pressure to the force sensing element without the intermediate deformation phase, eliminating idle operations and reducing the time loss in the touching path while maintaining reliable touch signal generation.
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
This design enhances the stylus's responsiveness with direct touch actions, reduces the sensation of a collapsed pen core, and improves structural integrity by eliminating idle operations and providing a more compact configuration, allowing for precise pressure sensing and efficient pressure transfer.
Implementation Method 1
An elastic force of the elastic member drives the second end of the pen core module to be abutted to the force sensing element seamlessly
Implementation Method 2
the conductive rubber is pressed against the force sensing element so that the conductive rubber is deformed and generates a change in capacitance or resistance with the force sensing element
Implementation Method 3
the force sensing element is a digital output force sensing element formed by a capacitive microelectromechanical systems (MEMS) structure
Data Source
AI summary
An active stylus including a pen housing, a pen core module disposed in the pen housing, a control module disposed in the pen housing, and an elastic member assembled to the control module and the pen core module is provided. The pen core module has a first end and a second end opposite to each other. The first end is protruded out of the pen housing. The control module has a force sensing element, and an elastic force of the elastic member drives the second end of the pen core module to be abutted to the force sensing element seamlessly.