Curved Display Sealant Width Distribution for Light Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing curved display devices experience significant light leakage at the corners due to uneven stress distributions between the upper and lower glass substrates, which limits their ability to block light in dark states effectively.
Innovation Solution
A curved display device design that incorporates a sealant along the edges of the substrates, with different widths and positions for the first and second sealants, to reduce stresses and alter stress distributions, thereby minimizing light leakage. The sealant is applied more extensively on non-curved sides and sparingly on curved sides, optimizing the ratio of their widths to enhance adhesion and reduce optical axis angles, thus reducing light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform sealant is applied along all edges of the glass substrates, then the manufacturing process is simple, but the stress distribution remains uneven causing light leakage at corners
Solution Approach 1:
The patent applies different sealant widths at different locations: a first sealant with width W1 at non-curved edges and a second sealant with width W2 at curved edges, where W1 > W2. This local differentiation compensates for the uneven stress distribution, providing stronger reinforcement where stress is higher (non-curved edges) and reducing over-reinforcement where stress is lower (curved edges), thereby minimizing light leakage while maintaining manufacturing simplicity.
2Object-affected harmful factors
If the sealant width is increased to reduce light leakage, then the stress distribution improves, but the device size and material consumption increase
Solution Approach 1:
Instead of uniformly increasing sealant width across all edges, the patent locally increases the sealant width only where needed (W1 at non-curved edges) while keeping it narrower where less reinforcement is needed (W2 at curved edges). This targeted approach effectively reduces light leakage by addressing the specific stress concentration points without unnecessarily increasing overall material consumption.
3Object-affected harmful factors
If the sealant width ratio W1/W2 is increased to better reduce stress at non-curved edges, then light leakage decreases, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies that the width ratio W1/W2 should be between 1.1 and 6, with a preferred range of 1.3 to 3. This parameter optimization balances the need for effective stress reduction with the practical constraints of manufacturing precision. By defining a reasonable ratio range rather than requiring an exact value, the invention achieves effective light leakage reduction while maintaining feasibility in mass production.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The optimized sealant distribution effectively reduces light leakage in dark states by aligning optical axes closer to 0° or 180°, improving stress distribution and reducing traction on the substrates, thereby enhancing the display's ability to block light.
Implementation Method 1
the sealant comprising a first sealant located at an edge of a non-curved side of the first curved light-transmitting substrate and an edge of a non-curved side of the second curved light-transmitting substrate, and a second sealant located at an edge of a curved side of the first curved light-transmitting surface and an edge of a curved side of the second curved light-transmitting surface, the first sealant and the second sealant enabling the first curved light-transmitting substrate to adhere to the second curved light-transmitting substrate
Data Source
AI summary
The present invention provides a curved display device, a method for manufacturing a curved display device and an electronic device. The curved display device may comprise a first curved light-transmitting substrate, a second curved light-transmitting substrate arranged opposite to the first curved light-transmitting substrate and a sealant having a particular width distribution which is located between the first curved light-transmitting substrate and the second curved light-transmitting substrate and coated along edges of the first curved light-transmitting substrate and the second curved light-transmitting substrate. The sealant having particular width distribution enables the first curved light-transmitting substrate to adhere to the second curved light-transmitting substrate, and reduces the stresses in the first curved light-transmitting substrate and the second curved light-transmitting substrate, while changing the stress distributions of the first curved light-transmitting substrate and the second curved light-transmitting substrate.