Curved Display Panel Corner Inversion for Stress Reduction
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Solution Overview
Problem
Conventional flat panel display devices suffer from stress concentration and light retardation issues due to uneven curvature, leading to deteriorated display quality and immersion experience.
Innovation Solution
A curved display device design featuring a display panel with corner portions that are curved in reverse directions to each other, reducing stress concentration and light retardation, and incorporating a flexible substrate to maintain a convex or concave curved shape, enhancing display quality and immersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If corner portions are curved in conventional flat panel displays, then display area is increased, but stress concentration and light retardation occur causing deteriorated image quality
Solution Approach 1:
The patent applies inversion by curving corner portions in reverse directions (outward rather than inward) to counteract stress concentration and light retardation effects. This reverse curvature compensates for the optical distortions caused by the main display area curvature, thereby maintaining image quality while preserving increased display area.
Solution Approach 2:
The patent applies local quality by making corner portions have different curvature characteristics than the main display area. Specifically, corner portions are curved in reverse directions with different radii of curvature tailored to each corner's position, optimizing stress distribution and optical performance locally at each corner while maintaining overall display quality.
2Shape
If display panel is curved to provide three-dimensional effect, then immersion is improved, but stress concentration causes deteriorated display quality
Solution Approach 1:
The patent applies asymmetry by making each corner portion have unique curvature characteristics tailored to its specific position on the display panel. Corner portions at different locations have different radii of curvature and curvature directions, creating an asymmetric compensation pattern that optimally counteracts stress concentration and light retardation effects across the entire curved display surface.
Solution Approach 2:
The patent applies local quality by customizing the curvature of each corner portion according to its local stress and optical conditions. Each corner is treated independently with specific curvature parameters optimized for its position, allowing localized compensation for stress concentration and light retardation while maintaining overall display quality across the curved surface.
3Ease of manufacture
If corner portions are curved with uniform radius, then manufacturing is simplified, but uneven curvature causes light retardation and stress concentration
Solution Approach 1:
The patent applies local quality by assigning different radii of curvature to different corner portions based on their specific positions and stress conditions. This localized customization optimizes curvature uniformity and reduces light retardation effects at each corner, achieving high manufacturing precision while maintaining reasonable ease of manufacture through systematic design rules.
Solution Approach 2:
The patent applies parameter changes by varying the radius of curvature parameter for each corner portion according to its position on the display panel. This systematic variation of curvature parameters compensates for position-dependent stress and optical effects, achieving uniform curvature characteristics across all corners while allowing for manufacturable design through clear parameter specifications.
Data Source
AI summary
A curved display device comprises a display panel which includes a display area portion having a curved shape and a plurality of corner portions located on the outside of the display area portion where the plurality of corner portions is curved towards the display area portion in a plan view.