Conductive Elastic Touch Pen for Capacitive Panel Control
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Solution Overview
Problem
Capacitive touch panels face issues with sensitivity, cleanliness, and user compatibility due to finger size, nail conductivity, and sweat contamination, with existing touch pens not effectively providing appropriate capacitance to improve control and operation.
Innovation Solution
A touch pen design featuring a main body with a cladding portion and a conductive elastic element that adjusts touch area and pressure, using a conductive touch element to maintain uniform capacitance and reduce damage to capacitive touch panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional capacitive touch panel is operated using a finger, then the touch panel can be controlled, but the finger blocks user vision and may accidentally touch other areas
Solution Approach 1:
The patent introduces a touch pen as an intermediary tool between the user and the capacitive touch panel. The touch pen includes a conductive elastic element with a specific structure that serves as a mediator to transfer touch input to the panel without blocking the user's vision, thereby resolving the contradiction between ease of operation and vision blocking.
2Reliability
If a touch pen with a spring mechanism is used to absorb pressure, then damage to the touch panel is reduced, but appropriate capacitance cannot be produced
Solution Approach 1:
The patent changes the material parameter of the elastic element from conventional non-conductive spring material to conductive elastic material. This parameter change allows the element to simultaneously provide mechanical buffering (absorbing pressure to prevent damage) and electrical functionality (producing appropriate capacitance for touch panel operation), thereby resolving the contradiction between reliability and manufacturing precision.
3Reliability
If a soft touch ball is used at the pen tip to suppress deformation, then the touch panel is protected from damage, but appropriate capacitance is not facilitated
Solution Approach 1:
The patent employs a composite structure where the conductive elastic element combines the mechanical properties of a soft buffer (to suppress deformation and protect the touch panel) with the electrical properties of a conductive material (to facilitate appropriate capacitance generation). This composite approach resolves the contradiction between reliability and manufacturing precision.
4Ease of operation
If the finger is used to operate the touch panel, then control is possible, but sweat and stains contaminate the panel
Solution Approach 1:
The touch pen serves as an intermediary tool that transfers touch input to the capacitive touch panel without direct finger contact. The conductive elastic element at the tip of the pen provides the necessary capacitance change for touch detection while keeping the user's finger away from the panel surface, thereby preventing sweat and stain contamination while maintaining ease of operation.
5Ease of operation
If a larger touch area is used for better control, then operation is easier, but precision for small icons is reduced
Solution Approach 1:
The patent utilizes the dynamic characteristics of the conductive elastic element, which can deform elastically under pressure. This dynamic property allows the touch pen to provide stable control through the elastic buffer force while maintaining the ability to precisely target small icons, as the elastic deformation can be controlled to match the user's input force, thereby resolving the contradiction between ease of operation and measurement precision.
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 touch pen enhances user control and operation on capacitive touch panels by providing adjustable touch areas and elastic buffer force, reducing accidental inputs and extending panel lifespan.
Implementation Method 1
a conductive elastic element disposed in the containing space, and an end of the conductive elastic element is abutted against the main body, and the other end of the conductive elastic element is abutted against the limit portion of the touch element for providing a buffer force
Implementation Method 2
the other end of the conductive elastic element is abutted against the limit portion of the touch element for providing a buffer force of the downwardly pressed touch element and maintaining a uniform clicking force of the touch pen
Data Source
AI summary
A touch pen includes a main body, a touch element and a conductive elastic element which is a conductor. The main body has a cladding portion at an end of the main body, and the touch element is disposed in the main body, and a contact portion is formed at an end of the touch element and exposed from the cladding portion. When use, the contact portion and a using surface form a larger touch area in contact with each other, or a side of the cladding portion and the contact portion form a smaller touch area in contact with the using surface, so that the larger touch area or the smaller touch area can be used to cope with the using habits of different users and achieve an effective touch function.