Cushion Plate Structure for Narrow-Bezel Display Bending
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Solution Overview
Problem
The existing display devices face challenges in minimizing the bezel area while reducing the tension on the cushion portion of the cushion plate, leading to unevenness defects and visible pressed stains, which affect user immersion and device aesthetics.
Innovation Solution
A display module with a cushion plate structure that includes an embossed layer, first and second cushion portions, and a heat-dissipation layer, where the second cushion portion is thinner and closer to the bent portion, reducing tension and using a PET support layer to minimize unevenness defects, and a bent panel fixing member to secure the pad portion to the cushion plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the bending radius of curvature is increased to bend the flexible circuit board or display panel more stably, then the bending stability is improved, but the bezel area increases and the total width of the display device increases
Solution Approach 1:
The cushion plate is divided into a first cushion portion and a second cushion portion with different thicknesses. The first cushion portion has a larger thickness to provide stable bending support, while the second cushion portion has a smaller thickness to reduce overall device width and minimize tension on the heat-dissipation layer during bending operations.
2Area of stationary object
If the thickness of the cushion layer is reduced to reduce the bending radius of curvature and bezel area, then the bezel area is reduced, but the heat-dissipation layer experiences strong tension and adhesion uniformity deteriorates
Solution Approach 1:
The cushion plate is segmented into regions of different thicknesses. The thinner second cushion portion reduces the bending radius and bezel area, while the thicker first cushion portion provides sufficient cushioning support. This segmentation allows the heat-dissipation layer to be bonded to an adequately thick cushioning layer, maintaining adhesion uniformity and preventing defects.
Solution Approach 2:
Different portions of the cushion plate are given different thicknesses according to their specific functional requirements. The second cushion portion near the bending area is thinner to minimize tension and bezel area, while the first cushion portion is thicker to provide adequate cushioning and maintain adhesion quality where needed.
3Area of stationary object
If the pad of the display panel is bent and positioned under the bottom surface to reduce bezel area, then the bezel area is reduced, but the bent pad presses the cushion layer and causes severe unevenness defects
Solution Approach 1:
The cushion plate is divided into a first cushion portion and a second cushion portion. The first cushion portion is positioned to receive and distribute the pressure from the bent pad, while the second cushion portion maintains appropriate thickness to prevent excessive compression. This segmentation prevents severe unevenness defects while enabling the pad to be bent under the bottom surface for reduced bezel area.
4Device complexity
If a uniform thickness cushion plate is used to maintain structural simplicity, then the device complexity is reduced, but the tension on the heat-dissipation layer increases and causes adhesion defects
Solution Approach 1:
The cushion plate is segmented into a first cushion portion and a second cushion portion with different thicknesses. This segmentation is achieved through a straightforward manufacturing process that forms a step structure, maintaining relative structural simplicity while effectively reducing tension on the heat-dissipation layer and preventing adhesion defects.
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 configuration reduces the bezel area, minimizes tension on the heat-dissipation layer, and decreases the visibility of internal pressed stains, enhancing user immersion and device appearance by ensuring uniform adhesion and reduced defects.
Implementation Method 1
A cushion plate for heat-dissipation and shock absorption which includes a heat-dissipation layer as a metal layer
Implementation Method 2
A cushion plate for heat-dissipation and shock absorption which includes a heat-dissipation layer as a metal layer and a cushion layer adhered to the heat-dissipation layer
Data Source
AI summary
Disclosed are a display module and a display device capable of minimizing a pressed stain defect while reducing a bezel area. To this end, a thickness of a cushion portion of a cushion plate closer to a bent portion may be reduced, thereby reducing a bending radius of curvature such that the bezel area may be reduced. Further, placing a support layer having a strong supporting force formed of PET into the cushion plate such that the support layer is in contact with the heat-dissipation layer may allow minimizing an unevenness defect on the cushion plate even when a bent pad portion of a display panel presses the cushion portion. Thus, visibility of an internal pressed stain to a user may be minimized.