Display Panel Electrode Blocking Structure Against Edge Warping
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Solution Overview
Problem
The edge warping of electrodes after laser ashing in display panels reduces the reliability of packaging, as the curling edges can scratch the encapsulation layer, compromising the encapsulation effect.
Innovation Solution
A display panel design with a blocking structure that separates the reserved and removed portions of the electrode material layer, preventing edge curling by forming a height difference at the junction of the first and second regions, and using a sheltering layer to control laser exposure during ashing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If laser ashing is used to pattern the electrode layer, then the transmittance of the screen body is improved, but the electrodes occur edge warping which reduces packaging reliability
Solution Approach 1:
The electrode layer is divided into multiple independent electrode patterns (first electrodes, second electrodes, third electrodes) with different ashing conditions. Each electrode type has its own ashing parameters (power, speed, number of passes) to control edge warping independently, allowing the screen to achieve high transmittance while maintaining packaging reliability through segmented processing of different electrode regions
Solution Approach 2:
Different regions of the electrode layer are subjected to different laser ashing qualities and parameters. The first, second, and third electrodes receive tailored ashing treatments based on their specific locations and functional requirements, enabling local optimization of both transmittance and edge stability for each electrode type while maintaining overall packaging reliability
2Productivity
If the electrode layer is patterned to increase transmittance, then the screen performance is improved, but the edge warping of electrodes increases which harms encapsulation reliability
Solution Approach 1:
The laser ashing process is applied periodically with multiple passes at different power levels and speeds. Each electrode type undergoes a sequence of ashing operations (first ashing, second ashing, third ashing) with varying parameters, allowing progressive removal of electrode material while controlling edge warping through periodic adjustments in ashing intensity and duration
Solution Approach 2:
The laser ashing parameters (power, speed, number of passes, focal position) are systematically changed for different electrode types and processing stages. By adjusting these parameters, the process achieves optimal balance between material removal efficiency (for high transmittance) and edge warping control (for encapsulation reliability), with each electrode type receiving customized parameter sets
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 design enhances the reliability of encapsulation by preventing edge curling and improving the manufacturing process, ensuring effective encapsulation without compromising the electrode layer's functionality.
Implementation Method 1
removing by laser a portion of the first electrode material layer located within the second region to form a plurality of openings
Data Source
AI summary
A display panel, a display device and a method of manufacturing the display panel. The display panel includes a display region, and the display region includes a first region and a second region. The display panel includes a base body and a first electrode layer. At least a portion of the first electrode layer is located on a side of the base body, the first electrode layer includes a plurality of first electrodes and a plurality of openings, the first electrodes are located within the first region, and the openings are located within the second region. The display panel is provided with a blocking structure which is configured to block the first electrodes from extending to the second region.