Touch Panel Electrode Bridging Structure for Signal Conduction
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Solution Overview
Problem
Conventional five-wire resistive touch panels face transmission attenuation issues due to long silver wires, leading to decreased conduction rates and increased power consumption, which can damage components and shorten their lifetime.
Innovation Solution
The implementation of electroconductive bridging portions between the upper and lower layers of the touch panel, connected via longitudinal electroconductive bridging portions that directly contact the transparent electroconductive layer of the electroconductive film, reducing transmission loss and enhancing signal conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If long silver wires are used to connect the electroconductive film to the flexible printed circuit board, then the signal feedback function is achieved, but transmission attenuation increases and conduction rate decreases
Solution Approach 1:
The patent divides the single long silver wire connection into multiple segments: the electroconductive film is divided into four corner electrodes, and the connection path is segmented into multiple electroconductive bridging portions arranged in parallel. This segmentation reduces the effective transmission distance for each segment and provides multiple conduction paths, thereby reducing overall transmission loss and improving reliability.
Solution Approach 2:
The patent merges multiple electroconductive bridging portions in parallel between the electroconductive substrate and electroconductive film. By combining multiple conduction paths that were previously separate (corner connections) into a unified bridging structure, the patent achieves both reduced transmission loss and improved conduction rate while maintaining the signal feedback function.
2Reliability
If power of the touch panel is increased to ensure conduction rate, then signal transmission quality improves, but power consumption increases and temperature rises
Solution Approach 1:
The patent changes the structural parameters of the electroconductive connections by introducing multiple electroconductive bridging portions with optimized dimensions (length, width, thickness) and material properties. This parameter optimization improves conduction rate and signal quality without requiring increased power input, thereby avoiding the power consumption and temperature rise problems associated with high-power operation.
3Loss of energy
If multiple electroconductive bridging portions are used to increase conduction rate, then transmission loss decreases, but device complexity increases
Solution Approach 1:
The electroconductive bridging portions serve multiple functions simultaneously: they provide signal conduction, reduce transmission loss, and maintain mechanical alignment between layers. By designing these bridging structures to fulfill multiple roles, the patent reduces the need for additional separate components, thereby limiting the increase in device complexity despite the use of multiple bridging portions.
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 solution increases the conduction rate between layers, improves coordinate calculation accuracy, decreases power consumption, and reduces manufacturing complexity and costs, resulting in a more efficient and durable touch panel.
Implementation Method 1
Opposite surfaces of the electroconductive substrate and the electroconductive film are coated with a transparent electroconductive layer... increases the conduction rate between the upper and lower layers
Implementation Method 2
A region of the electroconductive substrate corresponding to the circumferential electrode loop is printed with an insulating layer... keep insulated to ensure the upper and lower structures from being electrically connected
Implementation Method 3
an insulating adhesive layer adheres the insulating layer of the electroconductive substrate to the electroconductive film
Data Source
AI summary
The invention relates to a touch panel with an electrode bridging structure. The touch panel includes an electroconductive substrate and an electroconductive film disposed on the electroconductive substrate. Surfaces of the electroconductive substrate have upper and lower electrodes. The invention is characterized in that at least two electroconductive bridging portions are disposed between the electroconductive substrate and the electroconductive film, and can electrically connect the electroconductive substrate to the electroconductive film. Thus, the upper and lower electrodes of the touch panel can perform the induction conduction through the electroconductive bridging portions, thereby effectively increasing the conduction rate, decreasing the power load of the touch panel and saving the energy.