Touch Panel Trace Lead-Out Region Narrowing
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Solution Overview
Problem
Current touch panels face challenges in efficiently integrating touch functionality with OLED display technology, particularly in achieving a narrow bezel design due to the complexity of lead convergence regions and signal interference in flexible multi-layer on cell structures.
Innovation Solution
The touch panel design incorporates a trace lead-out region with asymmetric convergence directions of fold lines in lead convergence regions, reducing the width of the trace lead-out region and improving signal reliability by using power supply lines for shielding, and a flexible multi-layer on cell structure that integrates touch and display functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible multi-layer on cell structure is used to integrate touch and display functions, then the integration of touch functionality with OLED displays is enhanced, but the complexity of lead convergence regions increases
Solution Approach 1:
The touch panel is divided into a touch region and a binding region, with the lead convergence regions specifically located in the binding region away from the touch region. This segmentation separates the complex lead convergence structure from the touch-sensitive area, reducing interference while maintaining functional integration.
Solution Approach 2:
The lead convergence regions are positioned in a different spatial dimension (the binding region on one side of the first direction) from the touch electrodes in the touch region. This dimensional separation allows complex lead convergence without affecting touch functionality.
2Length of moving object
If the trace lead-out region width is reduced to enable narrow bezel design, then the bezel width is narrowed, but signal interference between lead convergence regions and touch electrodes increases
Solution Approach 1:
The lead convergence regions are extracted and positioned in the binding region, separate from the touch region. This extraction removes the potential source of signal interference from the touch electrode area, allowing narrow bezel design without compromising signal integrity.
Solution Approach 2:
The binding region acts as an intermediary space between the touch region and the external connection, housing the lead convergence regions. This intermediary positioning allows compact design while preventing direct interference between lead traces and touch electrodes.
3Area of stationary object
If lead convergence regions are positioned to overlap with touch sub-regions for compact design, then the overall panel size is reduced, but signal interference and reliability decrease
Solution Approach 1:
The panel is segmented into distinct touch region and binding region, with lead convergence regions confined to the binding region. This segmentation ensures spatial separation of functions, maintaining signal reliability while achieving compact overall design.
Solution Approach 2:
Lead convergence is achieved in a different dimensional space (binding region on one side of the first direction) rather than overlapping in the same plane as touch electrodes. This dimensional approach maintains compactness without sacrificing reliability.
Data Source
AI summary
A touch panel, preparation method thereof and display apparatus. The touch panel includes a touch region and a binding region, wherein the touch region includes n touch sub-regions disposed sequentially along a second direction, and at least one touch sub-region includes multiple touch electrodes and multiple touch traces; the binding region includes a trace lead-out region adjacent to the touch region, and the trace lead-out region includes n lead convergence regions disposed sequentially along the second direction; first ends of multiple touch traces in an i-th touch sub-region are connected respectively to multiple touch electrodes in the i-th touch sub-region, and second ends of the multiple touch traces in the i-th touch sub-region extend to an i-th lead convergence region of the trace lead-out region; n is a positive integer greater than 2, i=1, 2, . . . , n, and the second direction crosses the first direction.