Hybrid Touch Panel Structure for Glove-Accurate Input
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Solution Overview
Problem
Existing touch devices face limitations in light transmittance and durability, with resistive touch panels requiring hard presses and being prone to damage, and capacitive touch panels struggling with accuracy when users wear gloves.
Innovation Solution
A hybrid touch device combining a capacitive direct touch unit and a resistive indirect touch unit, featuring a conductive film base layer, sensing and driving lines, an optically clear adhesive layer, and a thin conductive glass second conducting layer, with a shielding layer to reduce electromagnetic interference, allowing for both direct and indirect touch operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resistive touch panel is used, then the technology is simple and it is not easily interfered by the environment, but the light transmittance is low and it requires hard pressing which can damage the conducting layers
Solution Approach 1:
The patent combines capacitive touch and resistive touch technologies into a single hybrid touch device. The capacitive touch layer provides high light transmittance and gentle touch capability, while the resistive touch layer provides environmental interference resistance and accurate touch signal generation, allowing the device to achieve both functions simultaneously
2Reliability
If a resistive touch panel is used, then the technology is simple and it is not easily interfered by the environment, but the user needs to press hard which can damage the conducting layers and reduce service life
Solution Approach 1:
The hybrid structure merges the durability benefits of resistive touch with the gentle operation characteristics of capacitive touch. The capacitive layer absorbs light touch operations, preserving the resistive layer for situations requiring accurate touch detection, thereby extending overall device service life while maintaining environmental interference resistance
3Ease of operation
If a capacitive touch panel is used, then it is more convenient and does not require hard pressing, but it is not easy to generate the touch signal accurately when the user wears gloves
Solution Approach 1:
The patent integrates capacitive touch for general convenient operation with resistive touch for accurate touch signal generation. When users wear gloves, the resistive layer can be activated to provide accurate touch detection, while the capacitive layer continues to provide responsive and convenient operation for bare-touch scenarios
Solution Approach 2:
The hybrid structure acts as an intermediary system that switches between capacitive and resistive touch modes depending on the operating conditions. The control unit determines which touch layer to activate based on whether glove usage is detected, providing the appropriate touch mechanism for each scenario
4Ease of operation
If a capacitive touch panel is used, then it is more convenient for light touching, but the touch signal cannot be generated accurately when the user wears gloves
Solution Approach 1:
The hybrid touch device merges capacitive and resistive touch layers, where the capacitive layer handles light touch operations for convenience, and the resistive layer provides accurate touch signal generation when needed, such as when users wear gloves
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
Enhances user experience by reducing touch force, increasing durability, and ensuring accurate signal generation regardless of glove use, while maintaining high light transmittance and resistance to electromagnetic interference.
Implementation Method 1
An optically clear adhesive (OCA) layer is disposed between the direct touch unit and the indirect touch unit
Implementation Method 2
a shielding layer is disposed between the conductive film and the OCA layer
Implementation Method 3
The second conducting layer of the indirect touch unit is a thin conductive glass
Data Source
AI summary
A hybrid touch device includes a direct touch unit and an indirect touch unit disposed at two sides respectively. The direct touch unit includes a base layer, a sensing line layer, a driving line layer, a bonding layer, and a covering layer. The indirect touch unit includes a first conducting layer, a second conducting layer, and a plurality of spacers between the first conducting layer and the second conducting layer. An optically clear adhesive (OCA) layer is disposed between the direct touch unit and the indirect touch unit. The base layer of the direct touch unit is a conductive film. A shielding layer is disposed between the conductive film and the OCA layer. The second conducting layer of the indirect touch unit is a thin conductive glass.