Display Module Bending Region Reinforcement Plate Design
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Solution Overview
Problem
Conventional display modules face challenges in achieving a narrow bezel and ultra-thin design due to the need for a smaller radius of curvature in the bending region, which is typically addressed by reducing the thickness of the reinforcement plate, leading to poor adhesion and reliability issues.
Innovation Solution
The display module incorporates a super clean foam (SCF) assembly with a receiving slot for the reinforcement plate, allowing for a reduced total height in the bending region while enhancing adhesion through a thicker reinforcement plate and pressure-sensitive adhesive layers, ensuring reliable bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the thickness of the reinforcement plate is reduced to achieve a smaller radius of curvature (0.2mm or less), then the module thickness is reduced and narrow bezel design is achieved, but the adhesion of the reinforcement plate deteriorates
Solution Approach 1:
The reinforcement plate is folded along a bending line to form a bent configuration, transitioning from a planar two-dimensional structure to a three-dimensional structure with spatial arrangement. This dimensional change allows the reinforcement plate to achieve the required small radius of curvature (0.2mm or less) while maintaining its thickness and adhesion properties, as the bending occurs in a different spatial dimension rather than reducing the plate thickness.
Solution Approach 2:
The bonding end of the display panel is inserted into a receiving slot formed by the bent reinforcement plate, creating a nested structure where one component is housed within another. This nesting arrangement provides mechanical interlocking that enhances adhesion and reliability, allowing the reinforcement plate to maintain both small curvature radius and strong bonding capability simultaneously.
2Length of moving object
If the radius of curvature of the bonding region is reduced to achieve narrow bezel design, then the bezel width is reduced, but the height of the bonding region must be lowered which compromises structural integrity
Solution Approach 1:
The bonding region achieves small radius of curvature through folding the reinforcement plate in a bent configuration, utilizing spatial arrangement in three dimensions rather than reducing the height in a single dimension. This allows the bonding region to have tight curvature for narrow bezel while maintaining sufficient height and structural integrity through the folded geometry.
Solution Approach 2:
The reinforcement plate is divided into distinct functional regions: a bonding end with bending line for curvature, a receiving slot for mechanical interlocking, and a main body for structural support. This segmentation allows each region to be optimized independently - the bonding end achieves small radius of curvature while the main body maintains structural integrity and strength.
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 design effectively achieves a radius of curvature of 0.2 millimeters or less while improving the adhesion and reliability of the bonding region, addressing the limitations of conventional modules.
Implementation Method 1
an ultraviolet (UV) adhesive is attached to a surface of the bending portion
Implementation Method 2
The reinforcement plate comprises a heat dissipation layer and a first pressure sensitive adhesive layer and a second pressure sensitive adhesive layer that are disposed on two opposite sides of the heat dissipation layer respectively
Data Source
AI summary
A display module includes a display panel, a first backplate, a super clear foam (SCF) assembly and a reinforcement plate. The first backplate is disposed on a side of a display panel opposite to a light emission surface. The SCF assembly and the reinforcement plate are disposed on a side of the first backplate opposite to the display panel. A receiving slot is defined in a side of the SCF assembly opposite to display panel. At least one part of the reinforcement plate is received in the receiving slot, and a driver chip is located on a side of the reinforcement plate opposite to the display panel.