Double-Curved Display Panel Stress Dispersion
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Solution Overview
Problem
Curved display devices with single-curved structures experience stress concentration on base substrates, leading to light retardation and degradation in display quality due to light leakage, especially when displaying black images.
Innovation Solution
A double-curved display device structure where the display panel is bent along both directions, with the second curvature radius being greater than the first, dispersing stress and reducing light retardation, and a receiving member and cover member are curved to maintain the display panel's shape, ensuring uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-curved structure is used for the display panel, then the manufacturing process is simpler, but stress concentration occurs on the base substrate causing light retardation and display quality degradation
Solution Approach 1:
The display panel is designed with a double-curved structure where the panel surface is curved along a first direction and the side surface is curved along a second direction. This dual curvature distributes mechanical stress across the base substrate more evenly, preventing stress concentration that would cause light retardation and display quality degradation, while maintaining manufacturing feasibility through precise curvature radius control.
2Reliability
If the display panel is curved along both directions with different curvature radii, then stress is dispersed and light leakage is reduced, but the device complexity increases
Solution Approach 1:
The display panel employs a double-curved structure with a first curvature radius for the panel surface and a second curvature radius for the side surface, where the second curvature radius is greater than the first. This geometric configuration disperses stress effectively to minimize light leakage while the curvature ratios are controlled to maintain manufacturing feasibility.
Solution Approach 2:
The invention specifies that the second curvature radius is greater than the first curvature radius, creating an optimized geometric parameter relationship. This parameter control allows the double-curved structure to achieve stress dispersion and light leakage prevention without excessive structural complexity, as the curvature ratio is constrained within practical manufacturing limits.
3Reliability
If a flat panel structure is used, then the base substrate maintains its non-optical characteristics, but three-dimensional effect and immersion are reduced
Solution Approach 1:
The display panel is curved along the first direction to create a convex display surface that enhances three-dimensional effect and user immersion. The double-curved structure with controlled curvature radii ensures that the base substrate's non-optical characteristics are maintained by distributing stress evenly, preventing light retardation that would degrade display quality.
Data Source
AI summary
A curved display device includes a display panel having a display area on which an image is displayed; a receiving member receiving the display panel; and a cover member covering a border of the display panel to combine with the receiving member. The display panel has a bent shape along a first direction and a second direction crossing the first direction and each of the receiving member and the cover member is bent to maintain the bent shape of the display panel.