Liquid Crystal Panel Etching for Stable Bending
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Solution Overview
Problem
Liquid crystal panels face damage during bending due to thickness discrepancies between etched and non-etched regions, leading to instability and potential breakage when curved displays are required.
Innovation Solution
A liquid crystal panel etching method involving differential masking and etching of substrates, where the first substrate is etched uniformly and the second substrate has a non-etched region, with specific thickness profiles for head, tail, and base members, and the use of encapsulation and masking to prevent etching solution infiltration, allowing for stable bending with a small radius of curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the liquid crystal panel is etched uniformly across the entire surface, then the thickness is reduced for curvature, but the edge regions become thinner than the center regions causing damage during bending
Solution Approach 1:
The patent applies different etching treatments to different regions of the substrate. The central region is etched to a greater extent than the edge regions, creating local thickness variations that compensate for stress concentration at the edges during bending. This local differentiation maintains edge strength while enabling curvature.
Solution Approach 2:
The substrate is divided into distinct regions with different etching characteristics - a central etched region and peripheral non-etched or lightly-etched regions. This segmentation allows each region to perform its specific function: the central region provides flexibility for curvature while the peripheral regions maintain structural strength.
2Strength
If masking is applied to protect edge regions from etching, then edge strength is maintained, but the manufacturing process becomes more complex
Solution Approach 1:
Masking patterns are applied to the substrate before the etching process begins. This preliminary masking action defines in advance which regions will be etched and which will be protected, simplifying the overall process by preventing the need for post-etching repairs or complex multi-step procedures.
Solution Approach 2:
Masking materials serve as intermediaries between the etching solution and the substrate. These masks selectively block the etching solution from reaching specific regions, enabling precise control over etching locations without requiring complex direct patterning of the substrate itself.
3Shape
If the liquid crystal panel is bent with small radius of curvature, then the display achieves the required curvature, but the thickness discrepancy between etched and non-etched regions causes damage
Solution Approach 1:
The patent modifies the thickness parameter distribution across the substrate by controlling the etching depth in different regions. The central region is etched deeper than the edges, creating a thickness gradient that reduces stress concentration during bending and enables smaller curvature radii without damage.
Solution Approach 2:
The peripheral regions are designed with greater thickness before bending occurs, providing a cushioning effect that compensates for the thinner central regions. This beforehand thickness distribution prevents stress concentration and damage during the bending process.
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 method enables the creation of stably bendable liquid crystal panels without damage, facilitating the production of displays with small curvature radii by reducing the thickness of non-etched regions through controlled etching and masking techniques.
Implementation Method 1
an entire area of the first substrate is etched
Implementation Method 2
installing an encapsulation portion configured to prevent infiltration of an etching solution on an extension of a second substrate
Data Source
AI summary
Provided is a liquid crystal panel and a liquid crystal panel etching method, the liquid crystal panel including a second substrate installed in a state of being spaced apart from a first substrate while having the first substrate and a liquid crystal layer interposed therebetween, wherein the first substrate is etched across the entire area thereof, and the second substrate has a non-etched region.