Control Grooves for Organic Encapsulation Layer Flatness
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Solution Overview
Problem
Display apparatuses with non-flat upper surfaces of organic layers can result in distorted images or a stripe pattern, affecting the operation and visual output of mobile electronic devices.
Innovation Solution
Incorporating control grooves in the display substrate's surface, specifically in the inorganic and organic encapsulation layers, to control the position of the organic encapsulation layer and refractive layer, ensuring they do not overlap with these grooves, thereby maintaining a uniform surface and preventing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the upper surface of the organic layer is not flat, then the display apparatus can be manufactured with simpler processes, but the image quality deteriorates with stripe patterns and distortion
Solution Approach 1:
The patent introduces a control groove structure formed in the inorganic encapsulation layer before the organic encapsulation layer is deposited. This preliminary structural feature guides and constrains the organic layer material during deposition, ensuring it fills the groove completely and forms a flat upper surface. The control groove acts as a pre-prepared template that directs material flow and distribution, achieving surface flatness without requiring complex post-processing or advanced deposition control.
2Manufacturing precision
If control grooves are introduced to control organic encapsulation layer position, then surface uniformity is improved, but device structure becomes more complex
Solution Approach 1:
The patent divides the encapsulation structure into distinct functional segments: the inorganic encapsulation layer containing control grooves, and the organic encapsulation layer that fills these grooves. This segmentation allows each layer to perform its specific function - the inorganic layer provides structural support and positioning features, while the organic layer provides flat coverage and protection. The control grooves themselves are segmented features that can be independently patterned and controlled, enabling precise positioning without complicating the entire device structure.
Data Source
AI summary
Provided is a display apparatus comprising: a display substrate including a substrate and a display element disposed over the substrate; and an encapsulation layer disposed over the display substrate and including an inorganic encapsulation layer and an organic encapsulation layer, the inorganic encapsulation layer shielding the display element, wherein a control groove configured to control a position of an end of the organic encapsulation layer is provided in at least one of the inorganic encapsulation layer and an upper surface of the display substrate, wherein the end of the organic encapsulation layer does not overlap the control groove, or the organic encapsulation layer overlaps only a portion of the control groove.