Segmented Cover Member for Flexible OLED Tolerance Absorption
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Solution Overview
Problem
Flexible organic light emitting diode displays face assembly tolerance issues due to curvature, which affects the flatness and viewing experience.
Innovation Solution
The use of a cover member with different thicknesses or materials for flat and curved regions, including a flat cover member and curved cover members, to absorb tolerance and enhance assembly, with the curved cover members being thicker or less dense to accommodate curved surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a uniform cover member is used across flat and curved regions, then manufacturing is simple, but assembly tolerance cannot be absorbed in curved portions
Solution Approach 1:
The cover member is divided into multiple regions: a flat cover member for the flat display region and curved cover members for the curved display regions. This segmentation allows each region to have optimized characteristics - the flat cover member maintains structural simplicity while the curved cover members are designed with greater thickness to absorb assembly tolerances in curved portions, thus resolving the contradiction between manufacturing precision and device complexity.
Solution Approach 2:
Different thicknesses and materials are applied to different regions of the cover member. The curved cover members have greater thickness than the flat cover member, creating local quality variations that enable tolerance absorption specifically where needed in curved regions without unnecessarily complicating the entire cover member structure.
2Manufacturing precision
If curved cover members have greater thickness to absorb tolerance, then assembly tolerance is absorbed, but weight increases
Solution Approach 1:
The cover member is segmented into flat and curved regions with different thicknesses. Only the curved cover members required for tolerance absorption have increased thickness, while the flat cover member maintains minimal thickness. This localized thickening absorbs assembly tolerances without unnecessarily increasing the weight of the entire cover member.
Solution Approach 2:
The thickness and material properties are optimized locally for each region. Curved cover members have greater thickness specifically where tolerance absorption is needed, while other regions maintain lighter construction. This local quality approach minimizes overall weight while achieving the required tolerance absorption function.
Data Source
AI summary
An organic light emitting diode display having a flat region having a flat surface, and curved regions disposed at left and right sides of the flat region and formed in curved surfaces, having a display panel including a substrate, which maintains a flat surface in the flat region, and is formed in curved surfaces in the curved regions, and organic light emitting diodes disposed on the substrate, a window disposed in the flat region and the curved regions on the display panel, and a cover member disposed under the display panel, in which the cover member includes a flat cover member disposed in the flat region and curved cover members disposed in the curved regions, and the flat cover member and the curved cover member are formed of different materials or have different thicknesses.