Stylus Button Mechanism for Capacitive Touch Accuracy
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Solution Overview
Problem
Conventional capacitive touch panels suffer from lower detection accuracy, particularly in applications requiring precise input, leading to the need for improved stylus designs that enhance touch control accuracy.
Innovation Solution
A stylus with a pen-shaped case structure, support structure, rear circuit board, function assembly, and power supply element, featuring a first and second conductive member, movable members, and a button body that allows for simultaneous electrical contact between conductive members when the button is pressed, enabling precise movement and signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If capacitive touch panels are used, then power consumption is reduced and service life is extended, but detection accuracy deteriorates
Solution Approach 1:
The stylus tip is segmented into multiple conductive members (first conductive member, second conductive member, third conductive member) with distinct functions. The first conductive member provides capacitive touch, the second conductive member provides erasing function, and the third conductive member provides pressure sensing, allowing each segment to optimize its specific function while maintaining overall energy efficiency and accuracy
Solution Approach 2:
The first movable member acts as an intermediary between the conductive members and the button body. When the button body is pressed, it drives the second movable member to move, which in turn causes the first movable member to contact both the first and second conductive members simultaneously, enabling precise control of the erasing function through capacitive coupling
2Measurement precision
If conventional capacitive styli are used, then touch control accuracy is improved, but device functionality is limited
Solution Approach 1:
The stylus integrates multiple functions into a single device: the first conductive member provides capacitive touch input, the second conductive member provides erasing capability, the third conductive member provides pressure sensing, and the button body provides manual activation. This multi-functional design allows one stylus to replace multiple specialized tools
Solution Approach 2:
The stylus incorporates movable members that can dynamically change the electrical connection state between conductive members. The first movable member can separably contact the first and second conductive members, and the button body can drive the second movable member to move, dynamically activating different functions as needed
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 enhances touch panel control accuracy by allowing simultaneous electrical connection of conductive members, improving the precision and functionality of capacitive touch panel operations.
Implementation Method 1
The first movable member is configured to separably contact the first conductive member and the second conductive member
Implementation Method 2
A portion of the third conductive member is sleeved on the second movable member, and abutted and contacted by the button body
Implementation Method 3
Capacitive touch panels generate capacitive coupling effects when an object touches a capacitive touch panel, so as to detect a touch location of the object based on the change of capacitance value
Data Source
AI summary
A portable electronic device includes a stylus including a pen-shaped casing structure, a support structure, a rear circuit board, a function assembly, a pen head structure and a power supply. The support structure is disposed in the casing structure. The rear circuit board is positioned on the support structure. The function assembly is disposed on the support structure. The head structure is partially disposed out of the casing structure. The power supply is electrically connected to the rear circuit board. The function assembly includes first, second and third conductive members, first and second movable members, and a button body. When the button body is pressed to drive the first and second movable members to move simultaneously, the first movable member simultaneously electrically contacts the first and second conductive members, so the first and the second conductive members are electrically connected with each other through the first movable member.