Display Polarizer Structure to Reduce Bend-Induced Deformation
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Solution Overview
Problem
Existing display apparatuses face issues with polarizer deformation, moisture permeation, and curl phenomena due to contraction and expansion, leading to reliability and display quality concerns.
Innovation Solution
Incorporating a polarizer with concave portions in non-active areas to minimize deformation, reduce moisture permeation, and prevent curling, thereby improving reliability and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the polarizer is made flexible to enable bending of the display apparatus, then the flexibility and elasticity are improved, but the polarizer deformation increases
Solution Approach 1:
The polarizer is divided into multiple regions with different properties: a first non-active area with normal structure and a second non-active area with concave portions that are bent. This segmentation allows different parts of the polarizer to respond differently to bending forces, maintaining overall stability while enabling flexibility.
Solution Approach 2:
The concave portions are localized specifically in the second non-active area where bending occurs, while the first non-active area maintains its original flat structure. This local modification allows the polarizer to accommodate bending stress in specific regions without deforming the entire structure.
2Adaptability or versatility
If the polarizer contracts due to bending stress, then the flexibility is improved, but the moisture permeation increases
Solution Approach 1:
The concave portions are pre-formed in the second non-active area before the display apparatus is put into service. This preliminary structural preparation creates built-in stress relief zones that prevent excessive contraction and maintain seal integrity during normal operation and bending, thereby preventing moisture permeation.
3Adaptability or versatility
If the polarizer is bent to enable flexible display, then the adaptability is improved, but the curl phenomenon increases
Solution Approach 1:
The polarizer is segmented into a first non-active area that remains flat and a second non-active area with concave portions that are bent. This segmentation creates a neutral axis that balances the bending stress, preventing the curl phenomenon while maintaining the desired flexibility.
Solution Approach 2:
The concave portions are asymmetrically designed with specific curvature radii and depths that are optimized to counteract bending-induced curling. The asymmetric geometry of the concave portions creates balanced stress distribution that prevents unwanted curling while allowing controlled bending.
Data Source
AI summary
A display apparatus can include a display panel having an active area and a non-active area, and a polarizer disposed on the display panel, The non-active area includes a first non-active area adjacent to at least a part of the active area, and a second non-active area extending from the first non-active area to be bent. The polarizer includes a plurality of concave portions disposed between the active area and the second non-active area, in the first non-active area. Accordingly, the deformation of the polarizer can be minimized, reduced or prevented.