Display Panel Insulating Layer Recess for Laser Reflection Control
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Solution Overview
Problem
The existing display panel structures face challenges in preventing the raising of the cathode/CPL due to laser beams reflected through the interface between the dam and insulating layers, which affects the structure's integrity and functionality.
Innovation Solution
A display panel design incorporating a substrate with an opening, a light-emitting element with specific electrode and intermediate layer configurations, partition walls, and a multi-layer insulating layer with recess portions, along with encapsulation layers to manage the laser beam reflection and prevent structural raising.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a laser beam is used to process the display panel, then the processing efficiency is improved, but the cathode/CPL structure is raised due to reflection at the interface between the dam and insulating layers
Solution Approach 1:
The patent introduces an intermediate layer between the dam and the insulating layers that serves as a mediator to manage laser beam reflection. This intermediate structure prevents the harmful reflection from occurring at the problematic interface, thereby maintaining both processing efficiency and structural precision.
Solution Approach 2:
The patent converts the harmful laser beam reflection into a beneficial effect by designing the interface structure to control and utilize the reflection in a predetermined manner. The reflection is redirected to achieve the desired processing outcome without causing unwanted cathode/CPL raising.
2Adaptability or versatility
If the display area is expanded to include more functions, then the versatility is improved, but the structural integrity is compromised due to laser beam reflection effects
Solution Approach 1:
The patent divides the display panel structure into distinct functional zones separated by dams and insulating layers. This segmentation allows different areas to serve different functions while the controlled reflection interfaces prevent structural interference between zones, maintaining overall integrity despite expanded functionality.
3Device complexity
If the interface between dam and insulating layers is used for laser beam processing, then the manufacturing process is simplified, but harmful reflection occurs causing structural raising
Solution Approach 1:
The patent converts the harmful laser reflection into a beneficial manufacturing feature by designing the interface geometry to control reflection patterns. The reflection is harnessed to achieve precise material processing while avoiding unwanted structural raising, thus maintaining process simplicity without sacrificing quality.
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
The solution effectively prevents the raising of the cathode/CPL structure, enhancing the display panel's integrity and functionality by controlling laser beam reflection and ensuring proper positioning of the second electrode and capping layer edges.
Implementation Method 1
the structure of the cathode/CPL being raised substantially by a laser beam reflected and progressing through an interface between a dam and insulating layers
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A display panel includes a substrate including an opening, a light-emitting element arranged in a display area around the opening and including a first electrode, a second electrode, and an intermediate layer between the first electrode and the second electrode, at least one partition wall arranged in a first non-display area between the display area and the opening, a multi-layer insulating layer below the at least one partition wall, and an encapsulation layer on the light-emitting element and including at least one inorganic encapsulation layer and an organic encapsulation layer, wherein the second electrode extends toward the first non-display area from the display area, and the multi-layer insulating layer includes a recess portion located between an edge of the second electrode and the at least one partition wall in the first non-display area.