Dual Elastic Member Touch Panel for Dust Sealing and Tracking
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Solution Overview
Problem
Conventional touch-panel electronic devices suffer from decreased tracking performance due to the low spring constant and high viscoelastic damping effect of the dust-proof packing, causing slow return to original position after pressing, which affects continuous operation recognition.
Innovation Solution
The use of a high hardness and high spring constant dust-proof packing combined with a low hardness and low spring constant double-sided tape allows the touch panel to quickly return to its initial position, improving tracking performance by balancing forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a soft dust-proof packing is used to prevent dust intrusion, then dust protection is improved, but the tracking performance deteriorates due to low spring constant and high damping effect
Solution Approach 1:
The elastic member is divided into two distinct segments: a first elastic member (dust-proof packing) made of soft material for dust protection, and a second elastic member (double-sided tape) made of hard material for structural support. Each segment performs its specialized function independently, resolving the contradiction between softness for dust protection and hardness for tracking performance.
Solution Approach 2:
The invention uses a composite structure combining two elastic members with different material properties. The first elastic member uses soft material (e.g., rubber or foam) for dust sealing, while the second elastic member uses hard material (e.g., metal or rigid plastic) for mechanical support. This composite approach allows both dust protection and tracking performance to coexist.
2Object-affected harmful factors
If a soft dust-proof packing with high damping effect is used, then dust sealing is improved, but the return speed to original position deteriorates
Solution Approach 1:
The elastic member is divided into two distinct segments: a first elastic member (dust-proof packing) made of soft material for dust protection, and a second elastic member (double-sided tape) made of hard material for structural support. Each segment performs its specialized function independently, resolving the contradiction between softness for dust protection and hardness for tracking performance.
Solution Approach 2:
The invention changes the physical parameters of the elastic members by selecting materials with appropriate hardness values. The first elastic member uses soft material with high damping for dust sealing, while the second elastic member uses hard material with low damping for fast return. This parameter differentiation allows both dust sealing and fast return speed to be achieved simultaneously.
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 configuration enhances the recognition of continuous pressing operations and prevents false detection due to vibrations, thereby improving the overall tracking performance and maintaining accurate touch input recognition.
Implementation Method 1
a first elastic member placed on the display surface of the display module... Hardness of the first elastic member is higher than that of the second elastic member
Implementation Method 2
a second elastic member placed on the housing... is fixed to the housing via a second elastic member placed on the housing
Data Source
AI summary
An electronic device includes a housing, a display module, and a touch panel. On the housing, an opening is formed. The display module is fixed to the inside of the housing in such a way that a display surface faces the side of the opening. The touch panel is placed to be opposed to the display surface of the display module via a first elastic member placed on the display surface of the display module, and is fixed to the housing via a second elastic member placed on the housing. Hardness of the first elastic member is higher than that of the second elastic member.