Multi-Functional Touch Pen Barrel Shielding Electromagnetic Interference
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Solution Overview
Problem
Existing styluses are incompatible with different touch technologies, such as resistive, capacitive, and electromagnetic, requiring multiple styluses for various electronic devices, which increases costs and user inconvenience.
Innovation Solution
A multi-function stylus design incorporating a first barrel with an electromagnetic touch module, a second barrel made of metallic material for shielding and capacitive touch functionality, and a third barrel for resistive touch, allowing switching between touch functions by adjusting barrel positions and structures, enabling use on devices with different touch panel technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different types of styluses are used for different touch technologies (electromagnetic, capacitive, resistive), then each touch electronic product can have optimized touch functionality, but users need to purchase and carry multiple styluses increasing cost and inconvenience
Solution Approach 1:
The patent designs a single stylus that can perform multiple touch functions by integrating different touch modules (electromagnetic coil, capacitive contact, resistive contact) within one barrel structure. The stylus can switch between electromagnetic, capacitive, and resistive touch modes, allowing one stylus to work with multiple types of touch screens, thereby eliminating the need for users to purchase separate styluses for different touch technologies.
Solution Approach 2:
The patent employs a nested structure where the electromagnetic coil module is placed inside the first barrel, and the second barrel can be sleeved over the first barrel to provide shielding or alternative touch functionality. This nested design allows multiple functional modules to be compactly integrated within a single stylus body, enabling multi-functionality without significantly increasing the overall size.
2Reliability
If electromagnetic touch module is used with metallic barrel, then electromagnetic induction is enhanced, but the metal barrel interferes with the electromagnetic coil induction
Solution Approach 1:
The patent uses a nested barrel structure where the first barrel (non-metallic) contains the electromagnetic coil, and the second barrel (metallic) can be sleeved over it. When electromagnetic touch is needed, the metallic second barrel is retracted or positioned to not interfere with the coil. When capacitive touch is needed, the metallic second barrel is extended to provide the conductive surface. This nested design allows the metal barrel to serve dual purposes without permanently interfering with electromagnetic induction.
Solution Approach 2:
The patent makes the second barrel detachable and movable, allowing it to be positioned dynamically based on the required touch mode. The second barrel can be extended or retracted, and detached or attached, to switch between capacitive touch (metallic surface exposed) and electromagnetic touch (metallic surface retracted or removed). This dynamic positioning resolves the conflict between needing metal for capacitive touch and avoiding metal interference for electromagnetic induction.
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 multi-function stylus integrates electromagnetic, capacitive, and resistive touch functions in a single device, enhancing user convenience and reducing the need for multiple styluses by utilizing the internal space effectively and providing adaptable touch induction mechanisms.
Implementation Method 1
the electromagnetic stylus needs a circuit board and an electromagnetic coil
Implementation Method 2
the barrel and a pen nib of the capacitive stylus need to be a conductive material so as to transmit charges on the panel to the pen nib and barrel for producing a touch induction
Data Source
AI summary
The disclosure provides a stylus comprising a first barrel, a second barrel, a first electromagnetic touch module and a capacitive touch module. The first electromagnetic touch module is disposed inside the first barrel. The second barrel is detachably sleeved to the outside of the first barrel and is of metallic material. When the first barrel is located inside the second barrel, the second barrel wraps the first barrel and the first electromagnetic touch module is shielded by the second barrel made of metal. When the second barrel and the first barrel are interlaced, the first electromagnetic touch module is exposed outside the second barrel. In addition, the second barrel has a capacitive touch end. The capacitive touch module is disposed corresponding to the capacitive touch end and has an electrical connection portion capable of being electrically connected to the capacitive touch end of the second barrel.