Pixel Defining Structure Guide Groove for Thin Film Encapsulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The thickness of flexible display screens is increased due to the need for a large amount of liquid membrane material to level and encapsulate the pixel defining structure, which deviates from the goal of reducing thickness and achieving a lightweight product, especially as pixel density increases.
Innovation Solution
Incorporating a guide groove connected to the pixel hole in the pixel defining unit, allowing encapsulation to occur only within the pixel hole and guide groove, reducing levelling height and material consumption, and guiding the levelling direction for improved efficiency and reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel density is increased to improve definition, then the image quality is improved, but the opening size becomes smaller and the amount of liquid membrane material required increases, leading to increased thickness
Solution Approach 1:
The pixel defining structure is segmented into multiple components: pixel defining holes for sub-pixel arrangement and guide groove sections for material flow control. This segmentation allows the liquid membrane material to be precisely directed into specific regions, reducing the overall amount of material needed while maintaining sufficient coverage for high pixel density structures
Solution Approach 2:
The guide groove acts as an intermediary structure that connects adjacent pixel defining units and directs the liquid membrane material flow. This intermediary channel ensures material is efficiently distributed to where it is needed most, reducing levelling height requirements and material consumption while supporting high definition displays
2Productivity
If the opening size is reduced to accommodate higher pixel density, then more pixels can be displayed, but the levelling difficulty increases and more liquid membrane material is required
Solution Approach 1:
The guide groove structure provides different local functions: narrow channels for material direction control and wider connection sections for material accumulation and levelling. This local quality variation allows efficient material distribution to small pixel openings while providing adequate space for levelling operations, reducing manufacturing difficulty
Solution Approach 2:
The guide groove adds a dimensional element to the pixel defining structure, creating a three-dimensional pathway system rather than flat openings. This dimensional addition allows material to flow from higher regions through guided channels to lower pixel areas, facilitating levelling while accommodating high pixel density
3Reliability
If more liquid membrane material is used to ensure sufficient coverage, then the encapsulation completeness is improved, but the thickness of the flexible display screen increases
Solution Approach 1:
The guide groove structure is pre-formed in the pixel defining layer before liquid membrane material application. This preliminary structural preparation creates built-in channels that automatically direct and contain the material during dispensing, ensuring complete encapsulation with minimal material and reduced thickness
Solution Approach 2:
The guide groove structure acts as a thin film configuration that confines and directs the liquid membrane material. This thin film approach provides effective material containment and distribution without adding significant thickness, maintaining encapsulation completeness while achieving thin overall structure
Data Source
AI summary
Embodiments of the present disclosure provided a display panel and a display device. The display panel includes a plurality of pixel defining units, each of the plurality of pixel defining units has a pixel hole for arranging a sub-pixel, and a first guide groove section connecting to the pixel hole, and the first guide groove sections corresponding to two adjacent pixel defining units are connected to each other to form a first guide groove.