Touch Panel Bezel Narrowing via Vertical Wire Lapping
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Solution Overview
Problem
Conventional touch panels face challenges in narrowing the bezel region due to the arrangement of wires on a single plane, making it difficult to reduce the width and spacing of wires effectively.
Innovation Solution
The use of penetrating holes in the second transparent substrate allows for conduction material to act as mediums between overlapping upper and lower conduction wires, forming double-layer lapping wires that share wires between planes to reduce the bezel region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wires are arranged on a single plane in conventional touch panels, then the wiring structure is simple and easy to manufacture, but the bezel region width cannot be effectively reduced
Solution Approach 1:
The patent transitions from a single-plane wire arrangement to a multi-layer spatial structure by introducing penetrating holes that pass through the second transparent substrate. This allows wires to be arranged in different layers (first conduction layer and second conduction layer) connected vertically through the substrate, effectively utilizing the third dimension to reduce the horizontal bezel width while maintaining wiring functionality.
Solution Approach 2:
The patent implements a nested structure where the first conduction layer and second conduction layer are embedded within the transparent substrates at different depths. The penetrating holes provide vertical pathways that nest the wiring structures across layers, allowing compact integration of multiple conduction paths within the limited bezel space without increasing the overall panel width.
2Length of stationary object
If the width and spacing of wires are shortened to narrow the bezel region, then the bezel width is reduced, but the manufacturing difficulty increases significantly
Solution Approach 1:
By moving the wiring arrangement into multiple layers connected through penetrating holes, the patent distributes wire spacing requirements across the vertical dimension rather than compressing all wires into a single horizontal plane. This allows larger effective spacing between wires in each layer while achieving compact overall bezel width, significantly easing manufacturing tolerances.
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 approach effectively narrows the bezel region by sharing wires between substrates, reducing the bezel width and achieving the desired space optimization.
Implementation Method 1
The third conduction layer is arranged on the third conduction pads and fills the penetrating holes, and the second conduction pads are respectively connected with the third conduction pads through the third conduction layer in the penetrating holes
Data Source
AI summary
A touch panel for narrowing bezel region and a touch display device using the same is disclosed. The touch panel includes a first transparent substrate, a first conduction layer, a transparent optical glue layer, a second transparent substrate and a second conduction layer from bottom to top. A bezel region of the first transparent substrate is provided with first conduction pads respectively connected with second conduction pads respectively through first conduction wires. The second transparent substrate is provided with third conduction pads. The second transparent substrate is penetrated with penetrating holes respectively arranged over the second conduction pads and respectively neighboring the third conduction pads. A third conduction layer is arranged on the third conduction pads and fills the penetrating holes. The second conduction pads are respectively connected with the third conduction pads through the third conduction layer in the penetrating holes.