Display Panel Bridge Electrode Insulation for Touch Short-Circuit Prevention
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Solution Overview
Problem
Residual metal in the manufacturing process of touch metal layers can cause short-circuiting between touch electrodes in display devices, rendering the touch function inoperative.
Innovation Solution
A display panel design that includes a bridging connection layer, an insulating layer, and a touch electrode layer, where the bridging connection layer consists of multiple bridge electrodes that intersect with the touch electrodes, creating a gap between the electrodes and residual metal to prevent short-circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disconnection processing is performed on the touch metal layer to insulate different touch electrodes, then the touch electrode insulation is improved, but residual metal may be generated causing short-circuiting between touch electrodes
Solution Approach 1:
An insulating layer is introduced as an intermediary between the touch electrodes and residual metal. This insulating layer prevents direct contact between conductive elements, thereby eliminating the harmful short-circuiting effect while maintaining the necessary insulation between touch electrodes
Solution Approach 2:
The harmful residual metal is effectively removed from the functional circuit by placing it within the insulating layer structure. The insulating layer extracts the residual metal from the conductive path, allowing it to exist without causing short-circuits between touch electrodes
2Adaptability or versatility
If multiple touch electrodes are arranged in the touch function layer, then the touch functionality is improved, but the risk of short-circuiting between electrodes increases
Solution Approach 1:
The insulating layer serves as a mediator between multiple touch electrodes, allowing them to be closely arranged for enhanced touch functionality while preventing electrical short-circuits between adjacent electrodes
Solution Approach 2:
The touch function layer is segmented into distinct conductive regions separated by the insulating layer. This segmentation allows multiple touch electrodes to coexist in close proximity while maintaining electrical isolation through the insulating barrier
Data Source
AI summary
The present disclosure relates to display technology and, particularly, to a display panel and a display device. In the display panel, a bridging connection layer includes multiple bridge electrodes and a touch electrode layer includes multiple first touch electrodes and multiple second touch electrodes. A first electrode unit of each first touch electrodes includes a first electrode subsection. A vertical projection of the first electrode subsection on a plane where the bridging connection layer is located is within a cover of a bridge electrode. In one embodiment, each bridge electrode includes a bridge electrode terminal and a bridge trace, in a second direction where multiple second electrode units of each second touch electrode are arrange, and extension length of the bridge electrode terminal is greater than a width of the bridge trace, and a first corner is formed at a joint of the bridge electrode terminal and the bridge trace.