Backlight Module Frame Interface for Snap-Fit Debris Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The conventional backlight module design results in the inner and outer frames rubbing at the snap-fit position, generating debris that can cause white spots on the display screen due to surface abrasion during manual assembly and transportation.
Innovation Solution
The design incorporates a positioning portion with a cross-section that does not directly contact the fastening portion, using a protective member with similar hardness to the outer frame to prevent abrasion, and employing a snap-fit engagement with recesses and fitting surfaces to minimize debris generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual snap-fit engagement is used to assemble the outer frame and inner frame, then the assembly process is simple and cost-effective, but the inner frame surface is easily scratched and debris is generated during assembly and transportation
Solution Approach 1:
The patent introduces a protective coating layer as an intermediary between the inner frame surface and the outer frame cross-section. This coating layer has different friction characteristics than the bare inner frame material, reducing direct abrasion and debris generation during snap-fit engagement and transportation. The coating acts as a mediator that protects the inner frame surface while maintaining the simplicity of the manual assembly process.
2Strength
If the cross-section of the positioning portion directly contacts the fastening portion, then the snap-fit engagement is secure, but the inner frame surface is scratched and debris is produced
Solution Approach 1:
The patent applies local quality by differentiating the properties of different regions at the snap-fit interface. The protective coating is applied specifically to the inner frame surface areas that will contact the outer frame cross-section, while other regions maintain their original properties. This localized protection ensures secure engagement where needed while preventing scratching and debris generation at contact points.
Solution Approach 2:
The protective coating serves as an intermediary layer between the hard outer frame cross-section and the softer inner frame surface. This intermediary layer maintains the mechanical interlocking and secure engagement of the snap-fit connection while preventing direct metal-to-soft-material contact that would cause scratching and debris.
3Ease of operation
If the inner frame is made of flexible material for ease of assembly, then the snap-fit engagement is easier to perform, but the material is softer and more prone to scratching and debris generation
Solution Approach 1:
The patent preserves the flexible, soft material properties of the inner frame for ease of assembly and snap-fit engagement, but locally enhances the surface properties by applying a protective coating. This coating provides harder, more wear-resistant characteristics at the contact surfaces while the bulk material remains soft and flexible for easy operation.
Solution Approach 2:
The patent creates a composite structure where the inner frame consists of a soft flexible base material combined with a harder protective coating layer. This composite approach combines the advantages of both materials: the soft base material provides ease of assembly and flexibility, while the harder coating layer resists scratching and reduces debris generation during engagement and transportation.
Data Source
AI summary
A backlight module and an electronic device are provided. The electronic device includes a display panel and a backlight module. The backlight module includes an outer frame and an inner frame. The inner frame is disposed inside the outer frame. The outer frame is provided with a positioning portion. A fastening portion is formed on an outer wall of the inner frame. A cross-section of the positioning portion does not directly contact the fastening portion, which can avoid the wear of the fastening portion caused by the cross-section of the positioning portion and reduce a debris generated by the friction between the outer frame and the inner frame at a snap-fit engagement position of the fastening portion and the positioning portion.