Curved LCD Mold Frame Bonding Mechanism
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Solution Overview
Problem
Conventional curved liquid crystal display devices have complex structures and high costs, making them less desirable for widespread adoption.
Innovation Solution
A curved liquid crystal display device with a simple structure featuring a stiff curved backplane, a light guide plate, and a mold frame that bonds to the liquid crystal panel, allowing the panel to curve downward and match the backplane's curvature, using a combination of TFT and CF substrates with polarizers and LED or CCFL light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional measures are used to achieve curved liquid crystal display devices, then the desired curvature effect is achieved, but the structure becomes complicated and cost increases
Solution Approach 1:
The patent introduces a mold frame as an intermediary component between the liquid crystal panel and the backplane. This mold frame includes a curved support structure that provides the necessary curvature force to the liquid crystal panel, while the panel itself remains flat. The mold frame acts as a mediator that translates the curved support structure's geometry into the desired curvature effect on the display panel, avoiding direct complex modification of the panel structure.
Solution Approach 2:
The patent divides the curved liquid crystal display device into distinct functional modules: a flat liquid crystal panel, a mold frame with curved support structure, and a backplane. This segmentation allows each component to be optimized independently - the panel maintains its simple flat structure for manufacturing ease, while the mold frame's curved support structure provides the necessary curvature. The raised sections and recessed grooves further segment the connection interface for precise positioning.
2Shape
If conventional measures are used to achieve curved liquid crystal display devices, then the desired curvature effect is achieved, but the manufacturing cost increases
Solution Approach 1:
The patent employs a mold frame made from relatively simple materials (such as plastic or metal) that can be manufactured cost-effectively through conventional molding or machining processes. The mold frame serves as a temporary structural element that provides curvature during assembly and can be removed or replaced without affecting the liquid crystal panel itself. This approach is more economical than permanently modifying the expensive liquid crystal panel structure to achieve curvature.
Solution Approach 2:
By using the mold frame as an intermediary, the patent avoids the need to complexly modify the liquid crystal panel structure, which would significantly increase manufacturing cost. The mold frame can be produced through standard manufacturing processes and assembled with the panel using simple bonding or mechanical connection methods, thereby keeping overall manufacturing costs low while still achieving the desired curved display effect.
3Shape
If the liquid crystal panel is forced to curve by the mold frame, then the panel matches the curved backplane, but the panel experiences mechanical stress
Solution Approach 1:
The patent applies curvature to the mold frame's support structure rather than directly to the liquid crystal panel. The curved support structure is designed with a radius of curvature that matches the desired display curvature, and it provides gentle, distributed mechanical force to the panel through the bonding layer. This approach achieves the necessary curvature matching between panel and backplane while minimizing concentrated stress points that could damage the panel.
Solution Approach 2:
The patent utilizes the flexibility of the liquid crystal panel and its bonding layer to accommodate the curvature imposed by the mold frame. The panel's thin-film structure allows it to bend to match the curved backplane when properly supported, while the bonding layer provides sufficient adhesion to maintain the curved shape without creating excessive stress. The design ensures that the panel's inherent flexibility is leveraged rather than fought against.
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 solution provides a cost-effective and simple structure for achieving a predetermined curvature in the liquid crystal panel, enhancing viewability and reducing distortion, while maintaining a wide viewable angle and extending the viewer's distance.
Implementation Method 1
The linear distance between the two coupling sections formed on the two sides of the top portion of the mold frame is shorter than a length of the liquid crystal panel so that the liquid crystal panel is forced by the mold frame to curve in a downward direction
Data Source
AI summary
The present invention provides a curved liquid crystal display device, which includes a curved backplane (3), a light guide plate (31) arranged on the curved backplane (3), a mold frame (2) mounted to the curved backplane (3), and a liquid crystal panel (1) bonded to the mold frame (2). The curved backplane (3) is in the form of a shell, which has two opposite inside walls that are respectively provided with a plurality of raised sections (32). The mold frame (2) includes two coupling sections (21) respectively formed at two opposite sides of a top portion thereof and a plurality of recessed grooves (22) formed in two opposite sides of a bottom portion thereof and having openings facing outward. The liquid crystal panel (1) is bonded to the coupling sections (21). The plurality of raised sections (32) are respectively received and retained in the plurality of recessed grooves (22) so as to fix the mold frame (2) to the curved backplane (3). The liquid crystal panel (1) is forced by the mold frame (2) to curve in a downward direction to have the liquid crystal panel (1) and the curved backplane (3) show identical curvatures.