Backlight Back Plate Protrusions for Adhesive Bonding
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Solution Overview
Problem
The adhesive force in adhesive-metal integrated structures of backlight sources is insufficient, leading to separation issues during manufacturing and use, particularly in high-temperature environments, which reduces production yield and utilization stability.
Innovation Solution
A backlight back plate design with protrusions at the side edges of openings, where the adhesive is filled into holes within these protrusions, increasing the bonding area and constraining the adhesive's position to enhance the adhesive force and prevent separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a through hole penetrating through the back plate is arranged to increase bonding area, then the bonding area between adhesive and back plate is increased, but the adhesive force still cannot meet the requirement of use intensity and adhesive separation occurs
Solution Approach 1:
The invention transitions from a two-dimensional bonding surface to a three-dimensional bonding structure by creating protrusions that extend into the adhesive. The protrusions have holes filled with adhesive, transforming the bonding interface from a flat surface to a volumetric structure with increased surface area and mechanical interlocking capability, thereby significantly enhancing adhesive force beyond what simple area increase achieves.
Solution Approach 2:
The invention creates a composite structure combining the back plate material (metal or plastic), the protrusion structure, and the adhesive material. This multi-material composite approach leverages the mechanical strength of the back plate, the structural complexity of the protrusions with holes, and the bonding properties of the adhesive to achieve superior overall bonding performance that neither material could achieve alone.
2Reliability
If the bonding area between back plate and adhesive is increased, then adhesive force should be improved, but in high-temperature environment adhesive is still prone to be separated from the back plate
Solution Approach 1:
The protrusion structure with holes filled with adhesive creates preliminary mechanical interlocking and constraint before thermal expansion or other destabilizing forces occur. The adhesive is pre-positioned and constrained within the holes of the protrusions, creating a robust bonding structure that resists separation under high-temperature conditions before thermal effects can compromise the bond.
Solution Approach 2:
The invention applies local quality enhancement by concentrating adhesive in specific strategic locations (the holes of the protrusions) rather than uniformly distributing it. This localized concentration of adhesive in high-stress areas creates stronger bonding at critical points, improving overall reliability under thermal stress without requiring uniform increases in adhesive quantity throughout the entire bonding area.
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 enhanced adhesive force between the adhesive and the back plate improves the stability and production yield of the backlight source product by ensuring a stronger bond that is less prone to separation.
Implementation Method 1
an adhesive that forms an integral structure with the backlight back plate by an injection molding
Data Source
AI summary
The present disclosure relates to the field of display design, and in particular to a backlight back plate, an adhesive-metal integrated structure of the backlight source, a backlight source and a display panel. The backlight back plate includes a bottom plate and protrusions. The protrusions are arranged at an opening at a side edge of the bottom plate, which are arranged on the bottom plate and extend into an adhesive that forms an integral structure with the backlight back plate by an injection molding and being provided with a hole into which the adhesive is filled.