Bended LCD via Differential Thermal Expansion
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Solution Overview
Problem
Existing methods for manufacturing bended liquid crystal displays face challenges in achieving stable curvature due to the limitations of glass sheet materials, resulting in displays that are not rigid and prone to variations in curvature over time.
Innovation Solution
The method involves using flat glass sheets with different thermal expansion coefficients, which are heated and bound together with an adhesive sealant to form a bended substrate, leveraging the thermal expansion phenomenon to achieve a consistent degree of curvature, allowing for mass production without excessive modification to existing equipment and ensuring stability over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If resin type material or film is used to bend glass sheet substrate, then the substrate can be bent, but the bending is not rigid and stability is poor causing curvature variation over service time
Solution Approach 1:
The patent changes the physical parameters of the glass sheets by subjecting them to thermal expansion and contraction cycles. By heating the glass sheets to expand them to a predetermined length and width, then cooling them to contract, the patent achieves rigid bending with stable curvature. This parameter change approach transforms the glass sheets from their original state to a bent state with consistent geometric properties.
Solution Approach 2:
The patent creates a composite structure by binding together array substrate and color filter substrate made from different glass sheet materials with different thermal expansion coefficients. This composite approach allows the substrates to maintain different lengths and widths after thermal processing, achieving stable rigid bending while maintaining structural integrity through the adhesive sealant.
2Shape
If different length and width values are used for array substrate and color filter substrate, then bended display can be formed, but mass production requires excessive modification on existing production equipments
Solution Approach 1:
The patent applies preliminary action by pre-heating the glass sheets to expand them to predetermined length and width values before binding. This preliminary thermal expansion ensures that when the substrates are bound together, they have the exact dimensions needed for the desired curvature, eliminating the need for post-assembly adjustments or complex equipment modifications for 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
This approach results in a bended liquid crystal display with stable flexibility and consistent curvature, enabling effective mass production while maintaining the quality and functionality of the display.
Implementation Method 1
heating the array substrate and the color filter substrate, and when it's determined that both the array substrate and the color filter substrate have been subjected to thermal expansion and reach a same predetermined length and width
Implementation Method 2
cooling the assembled substrate and forming a bended assembled substrate having a degree of curvature
Data Source
AI summary
Embodiments of the present invention disclose a bended liquid crystal display and a manufacturing method and apparatus therefore. The method comprises: preparing an array substrate and a color filter substrate with flat glass sheets having different thermal expansion coefficients; applying adhesive sealant at edges of surfaces of the array substrate and/or the color filter substrate; heating the array substrate and the color filter substrate, and binding the expanded array substrate and color filter substrate together, to form an assembled substrate; and cooling the assembled substrate and forming a bended assembled substrate having a degree of curvature. The bended liquid crystal display has a better stability, and has no variation in its degree of curvature over service time.