Flexible Display Lower Plate with Functional Layer for Stress Reduction
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Solution Overview
Problem
Existing display devices, particularly flexible ones, face challenges in maintaining product quality and reliability due to complex manufacturing processes and the need for additional components like protective films and adhesive layers, which can introduce wrinkles and impact resistance issues.
Innovation Solution
A display device design featuring a lower plate with defined patterns and a functional layer, including an etch-stop layer and laser light shielding layer, directly coupled to the display panel using an adhesive layer, which simplifies the manufacturing process and enhances impact resistance by reducing stress changes during folding and unfolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional protective films and adhesive layers are added to flexible display devices, then product quality and reliability are improved, but device complexity and manufacturing process complexity increase
Solution Approach 1:
The lower plate integrates multiple functions that were previously performed by separate components: it serves as a protective film, adhesive layer, and structural support element. The lower plate is directly coupled to the display panel, eliminating the need for separate protective films and adhesive layers, thereby reducing device complexity while maintaining reliability
Solution Approach 2:
The lower plate performs multiple functions simultaneously: it provides mechanical support, acts as a protective barrier, enables bonding to the display panel, and facilitates folding flexibility. This multi-functional design reduces the number of components needed while maintaining product quality and reliability
2Reliability
If additional protective films and adhesive layers are added to flexible display devices, then product quality is improved, but manufacturing process complexity increases
Solution Approach 1:
The lower plate combines the functions of protective films and adhesive layers into a single integrated component. This merging reduces the number of assembly steps and materials handling operations, thereby simplifying the manufacturing process while maintaining product quality
Solution Approach 2:
The invention extracts and eliminates unnecessary intermediate layers (separate protective films and adhesive layers) from the manufacturing process. By using the lower plate directly coupled to the display panel, the process is simplified without compromising product quality
3Ease of operation
If flexible display devices are folded and unfolded repeatedly, then user convenience is improved, but stress changes and impact resistance issues occur
Solution Approach 1:
The lower plate's structural parameters are optimized to balance flexibility and impact resistance. The plate's thickness, material properties, and geometric configuration are designed to withstand repeated folding while maintaining impact resistance, allowing user convenience without compromising reliability
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 improves product quality by enhancing the display device's flexibility and impact resistance, while simplifying the manufacturing process by eliminating the need for additional protective films and adhesive layers, thus improving user convenience and reliability.
Implementation Method 1
The lower plate may include a base substrate on which patterns may be defined, and a functional layer disposed on an upper surface of the base substrate, wherein the functional layer may include at least one of an etch-stop layer and a laser light shielding layer
Implementation Method 2
the functional layer may include at least one of an etch-stop layer and a laser light shielding layer
Data Source
AI summary
A display device includes a display panel in which a first non-folding area, a folding area, and a second non-folding area may be sequentially defined in a first direction, and a lower plate which is coupled to a lower portion of the display panel, the lower plate including a plurality of patterns overlapping the folding area, wherein a minimum width of the display panel in the first direction is smaller than a minimum width of the lower plate in the first direction.