Corner Display Panel Substrate With Variable Thickness for Stress Relief
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Solution Overview
Problem
Display panels experience significant stress and reliability issues in corner areas due to bending, which affects their structural integrity and performance.
Innovation Solution
The display panel design includes a substrate with varying thickness in corner areas, featuring a first base layer with a stair shape and a material layer with a lower modulus, along with a driving circuit arrangement to reduce stress and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the substrate thickness is increased to improve strength, then the structural integrity is improved, but the stress in corner areas increases and reliability deteriorates
Solution Approach 1:
The substrate is designed with non-uniform thickness, having a first thickness in the main display area and a second thickness (smaller than the first) in the corner display area. This local variation in thickness allows the substrate to have sufficient strength in the main area while reducing stress concentration in the corner areas, thereby improving reliability without compromising overall structural integrity.
2Area of stationary object
If the display area is increased to improve functionality, then the display capabilities are enhanced, but the stress in corner areas increases and reliability deteriorates
Solution Approach 1:
The substrate extends into corner display areas with reduced thickness compared to the main display area. This allows the display area to be expanded while the corner regions maintain lower stress levels due to their thinner profile, thus preserving reliability even as functionality is enhanced.
3Ease of manufacture
If the substrate thickness is uniformly reduced to improve ease of manufacture, then the manufacturing process is simplified, but the strength in corner areas deteriorates
Solution Approach 1:
Rather than uniformly reducing thickness, the substrate employs localized thickness variation where corner areas have reduced thickness while the main display area maintains greater thickness. This approach balances ease of manufacture with sufficient strength in critical areas, as the thinner corner regions experience reduced stress while the thicker main area provides overall structural support.
Data Source
AI summary
The present disclosure relates to a display panel and a display apparatus. The display panel includes: a substrate including a main display area and a corner display area extending from a corner of the main display area; and a plurality of pixels arranged in the main display area and the corner display area. The substrate further includes: a first base layer; a first barrier layer arranged on the first base layer; and a second base layer arranged on the first barrier layer. A thickness of the substrate in the corner display area decreases away from the main display area.