Curved Display Panel Parabolic Surface Design
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Solution Overview
Problem
Curved display panels face challenges such as complex fabricating processes and severe light leakage due to rapid curvature radius changes and stress, particularly in IPS and ADS technologies, which are not effectively addressed by existing OLED or VA modes.
Innovation Solution
A curved display panel with continuously curved light output and input faces, featuring a parabolic curve shape described by the mathematical formula y=ax^2+bx+c, where a, b, and c are constants set by mathematical fitting to achieve a curvature radius of 4200-6600 mm, reducing stress and light leakage by matching the natural bending degree of liquid crystal panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a curved display panel is formed with a bending shape that differs from the natural bending degree of the liquid crystal panel, then the curved surface design is achieved, but stress increases and light leakage occurs at peripheral regions
Solution Approach 1:
The patent applies parameter changes by optimizing the curvature radius to be 4200mm-6600mm, which matches the natural bending degree of liquid crystal panels. This specific parameter range reduces stress concentration and prevents light leakage at peripheral regions while maintaining the curved surface design.
Solution Approach 2:
The patent uses a continuously curved surface with a parabolic curve equation (y=ax²+bx+c) to define the bending shape. This continuous curvature design ensures smooth stress distribution across the panel, avoiding abrupt changes that would cause light leakage.
2Shape
If the curvature radius of each point on the curved surface changes rapidly, then the curved surface design is achieved, but stress increases and light leakage appears at peripheral regions
Solution Approach 1:
The patent controls the rate of curvature radius change by specifying a parabolic curve with equation y=ax²+bx+c and curvature radius of 4200mm-6600mm. This gradual change in curvature parameters reduces stress concentration compared to rapid curvature changes.
Solution Approach 2:
The continuously curved surface design with parabolic geometry ensures smooth transitions in curvature radius throughout the panel. This continuous curvature profile prevents abrupt stress changes that would occur with rapid curvature variations.
3Reliability
If OLED mode is adopted to reduce light leakage, then light leakage is improved, but fabricating cost becomes extremely high and yield becomes low
Solution Approach 1:
The patent changes the curvature parameter (radius of 4200mm-6600mm) to be compatible with liquid crystal panel manufacturing processes. This parameter optimization allows LCD technology to achieve curved displays without the high costs and low yields associated with OLED fabrication.
Solution Approach 2:
The patent uses liquid crystal panel technology, which is more cost-effective and has higher manufacturing yield compared to OLED technology. The continuous curved surface design with specific curvature parameters enables this cheaper technology to achieve the desired performance.
4Shape
If the curved display panel has a bending shape that differs from the natural bending degree, then curved surface design is achieved, but the fabricating process becomes complex
Solution Approach 1:
The patent simplifies the fabricating process by optimizing the curvature radius to 4200mm-6600mm, which aligns with the natural bending degree of liquid crystal panels. This parameter match reduces the complexity of the fabrication process while maintaining the curved surface design.
Solution Approach 2:
The continuously curved surface with parabolic geometry provides a mathematically defined bending profile that simplifies manufacturing. The continuous curvature without abrupt changes makes the fabrication process more straightforward compared to designs with rapid curvature variations.
Data Source
AI summary
A curved display panel, a curved display device, and a method for fabricating the same are disclosed. Both the light output face and the light input face of the curved display panel are continuous curved surfaces. The curved display panel with a continuous curved surface has a bending degree which is closer to the natural bending degree of a liquid crystal panel, so that a relatively small stress is generated on the curved display panel, and the problem of serious peripheral light leakage caused by deformation of the curved display panel is alleviated. Besides, since the curvature radius of each point on the continuous curved surface changes slowly, the problem of serious peripheral light leakage caused by deformation of the curved display panel is alleviated, the complexity of the fabricating process is reduced, the fabricating process is simplified, and the production of the product is improved.