Curved Display Panel Width Calculation for Crack Prevention
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Solution Overview
Problem
Conventional display apparatuses face issues with cracks during the bending process in manufacturing, leading to defects and a compromised aesthetic appeal due to improper curvature and width calculations in the display panel and cover window alignment.
Innovation Solution
The display apparatus is designed with a specific curvature and width calculation method, where the display panel's first width (WP1) is determined by the equation WP1=πRB2×cos-1RB-Z0RB⁰, ensuring proper alignment and bonding of the cover window to prevent stress-induced cracks, and the panel's corner curvature is matched with the window's curvature to maintain structural integrity and aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the display panel is bent to achieve a curved display structure, then the aesthetic appeal and display versatility are improved, but cracks may occur in the display panel during the bending process
Solution Approach 1:
The patent applies preliminary action by pre-forming the display panel with a specific curvature radius (RB) and width (WP1) calculated using the equation WP1=π×RB/2×cos⁻¹((RB-Z0)/RB) before the bonding process. This pre-calculation and pre-preparation of the curved shape ensures that the panel is already optimized for bending, preventing cracks during the actual bending and bonding operations.
Solution Approach 2:
The patent utilizes parameter changes by precisely controlling and adjusting the curvature radius (RB) and width (WP1) parameters of the display panel. By changing these parameters according to the specific equation, the panel's structural integrity is maintained while achieving the desired curved shape, thus preventing cracks during bending.
2Ease of manufacture
If the cover window and display panel are bonded with improper alignment, then the manufacturing process is simplified, but defects and poor aesthetic appeal occur
Solution Approach 1:
The patent applies preliminary action by pre-calculating the exact width (WP1) of the display panel using the equation WP1=π×RB/2×cos⁻¹((RB-Z0)/RB) before bonding. This pre-determined dimension ensures that when the cover window and display panel are bonded, they align perfectly without requiring complex adjustment processes, thus maintaining both manufacturing simplicity and high precision.
Solution Approach 2:
The patent replaces complex mechanical alignment systems with a mathematically precise dimensional design. By substituting the need for complex mechanical alignment mechanisms with a pre-calculated width parameter (WP1) based on the curvature radius and bonding area, the solution achieves high alignment precision through calculation rather than mechanical adjustment.
3Productivity
If the display panel width is not properly calculated, then the manufacturing process is faster, but dead space increases and aesthetic appeal deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-calculating the optimal width (WP1) of the display panel using the equation WP1=π×RB/2×cos⁻¹((RB-Z0)/RB) before the manufacturing process begins. This pre-determined dimension ensures that the display panel is perfectly sized to minimize dead space and maximize aesthetic appeal, while also streamlining the manufacturing process by eliminating the need for post-processing adjustments.
Solution Approach 2:
The patent utilizes parameter changes by precisely controlling the width parameter (WP1) based on the curvature radius (RB) and bonding area (Z0). By changing and optimizing this parameter according to the specific equation, the patent achieves the optimal balance between manufacturing efficiency and display area optimization, eliminating dead space while maintaining fast production.
Data Source
AI summary
A display apparatus includes a cover window including a window central area, a first window area connected to the window central area in a first direction, a second window area connected to the window central area in a second direction, and a window corner area contacting a corner of the window central area, and a display panel arranged below the cover window. When a radius of curvature of a portion of the display panel arranged to overlap the first window area is RB, and a length of the portion of the display panel arranged to overlap the first window area in a direction perpendicular to a portion of the display panel arranged to overlap the window central area is Z0, a first width (WP1) of the portion of the display panel in the first direction and arranged to overlap the first window area, satisfies the following equation:WP1=πRB2×cos-1RB-Z0RB90.