Flexible Display Substrate with Segmented Blocking Layer
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Solution Overview
Problem
Existing flexible display technologies have a sub-ideal protecting effect for display components due to the inefficacy of the blocking sub-layer in preventing water, oxygen, and scratches.
Innovation Solution
A display substrate with a supporting material layer comprising alternately arranged flexible and blocking sub-layers, where the blocking sub-layer is positioned at the topmost layer with a well structure to accommodate display components, providing enhanced protection by forming a ring-like structure that covers the component region and surrounding region, using materials like polyimide, silicon oxide, silicon nitride, or silicon oxynitride.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional blocking sub-layer is formed over the flexible material layer, then water and oxygen resistance is improved, but the protecting effect to display components remains sub-ideal
Solution Approach 1:
The blocking sub-layer is segmented into multiple layers with different inorganic materials (first blocking sub-layer with first inorganic material, second blocking sub-layer with second inorganic material). This multi-layer segmentation provides enhanced protection against water, oxygen, and scratches compared to a single-layer blocking structure, thereby improving both water resistance and component protection reliability
Solution Approach 2:
The blocking sub-layer uses composite inorganic materials (silicon oxide, silicon nitride, silicon oxynitride) arranged in multiple layers. The combination of different inorganic materials creates a composite barrier structure that simultaneously provides water resistance, oxygen resistance, and scratch protection, resolving the contradiction between basic barrier function and comprehensive component protection
2Ease of manufacture
If the blocking sub-layer is positioned at the bottom of the flexible display substrate, then manufacturing is simplified, but protection of display components is insufficient
Solution Approach 1:
The blocking sub-layer is inverted from its conventional position at the bottom to a topmost position above the flexible material layer and display components. This inversion allows the blocking sub-layer to directly protect display components from scratches and environmental factors, while the flexible material layer remains at the bottom for manufacturing simplicity and flexibility, thus resolving the contradiction between ease of manufacture and component protection
Data Source
AI summary
A display substrate includes a supporting material layer having at least one flexible material sub-layer and at least one blocking sub-layer, which can be alternately and successively arranged in layers. One blocking sub-layer is at a topmost sub-layer of the supporting material layer, and is provided with a well, located in a display area and configured for accommodating a display component therewithin. One or more of the at least one flexible material sub-layer or the at least one blocking sub-layer is configured as a target material layer. The target material layer includes a planar portion and a protruding portion over the planar portion. An orthographic projection of the protruding portion on a bottom surface of the supporting material layer forms a ring-like structure having an opening that covers an orthographic projection of a bottom surface of the well on the bottom surface of the supporting material layer.