Dam Structure Design for Display Panel Material Overflow Control
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Solution Overview
Problem
Existing Camera Under Panel (CUP) products face a technical issue with the low thickness of the dam structure due to overflow of organic film layer materials, leading to reduced reliability of the dam structure.
Innovation Solution
A display panel design that includes a dam structure with multiple stacked dam layers, where the width of the second dam layer is less than or equal to the first dam layer, and the absolute difference in thickness between the organic layer group and the dam structure is within a predetermined threshold, to prevent material overflow and ensure adequate thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple organic film layers are stacked to form the dam structure, then the separation and protection functions are improved, but the material overflow problem occurs resulting in reduced thickness and reliability
Solution Approach 1:
The dam structure is divided into multiple dam layers (first dam layer, second dam layer, etc.) stacked vertically. Each layer is formed separately with controlled width and thickness, preventing material overflow between layers while maintaining the overall structural integrity and separation function of the dam structure.
Solution Approach 2:
The patent specifies different width requirements for different dam layers: the second dam layer has a width less than or equal to the first dam layer's width. This local differentiation in dimensions prevents material overflow at specific interfaces while maintaining the overall dam structure's protective function.
2Object-generated harmful factors
If the width of upper dam layers is reduced to prevent overflow, then material containment is improved, but the overall dam structure thickness is reduced below design value
Solution Approach 1:
The dam structure is segmented into multiple layers with progressively smaller widths. The first dam layer has the largest width, the second dam layer has equal or smaller width, and subsequent layers follow the same pattern. This segmentation allows each layer to be optimized for its specific function while maintaining overall structural integrity.
Solution Approach 2:
Different width specifications are applied to different dam layers based on their specific functions. The first dam layer uses a larger width for comprehensive coverage, while subsequent layers use equal or smaller widths to prevent overflow, creating a locally optimized structure that meets both containment and thickness requirements.
Data Source
AI summary
The present application provides a display panel and a mobile terminal, including an array substrate; a dam structure; an organic layer group and a light-emitting layer sequentially stacked on the array substrate and in the display area. The dam structure includes a first dam layer and a second dam layer having a width less than or equal to a width of the first dam layer that are sequentially stacked over the array substrate. An absolute value of the difference between the thickness of the organic layer group and the thickness of the dam structure is less than or equal to the first predetermined threshold value.