Backlight Module Folded Edge Notch Positioning
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Solution Overview
Problem
Existing display devices face challenges in effectively limiting the position of optical film assemblies when using a back plate and sealant as exterior parts, leading to issues with light leakage and aesthetic irregularities.
Innovation Solution
A backlight module design featuring a back plate with folded edges and notches, combined with back plate corner stops that snap-fit into place, creates an accommodating space for the optical film assembly and limits its position, while also preventing light leakage through a frame with stepped surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a back plate and sealant are used as exterior parts to make the display device thinner and lighter, then the device thickness and weight are reduced, but the ability to effectively limit the position of the optical film assembly deteriorates, causing light leakage and aesthetic irregularities
Solution Approach 1:
The back plate is segmented into a base plate and a folded edge portion that forms notches at the corners. These notches create discrete positioning points that effectively limit the optical film assembly's position without requiring additional heavy components, thus maintaining the lightweight design while improving position limiting capability.
Solution Approach 2:
The folded edge portion acts as an intermediary structure between the base plate and the optical film assembly. It provides notches that serve as positioning features, enabling the optical film assembly to be accurately positioned and limited without requiring a heavier traditional back plate structure with sealant.
2Device complexity
If the optical film assembly position is not effectively limited, then the device structure remains simple, but light leakage occurs and aesthetic irregularities appear
Solution Approach 1:
The back plate is divided into a base plate and a folded edge portion with corner notches. This segmentation creates built-in positioning features that limit the optical film assembly position, preventing light leakage without adding complex external structures or components.
Solution Approach 2:
The positioning function is merged into the back plate structure itself through the folded edge portion and notches. Instead of using separate positioning components that would increase complexity, the back plate simultaneously provides structural support and position limiting functionality, preventing light leakage while maintaining structural simplicity.
Data Source
AI summary
Disclosed are a backlight module and a display device. The backlight module includes a back plate, an optical film assembly and a limiting assembly. The back plate includes a base plate and a folded edge formed at an edge of the base plate. The base plate and the folded edge cooperate to define an accommodating space. The folded edge is provided with notches at top corners of the back plate. The optical film assembly is arranged in the accommodating space. The limiting assembly limits a relative position between the optical film assembly and the back plate and includes back plate corner stops in one-to-one correspondence to the notches, and the back plate corner stops are fixedly arranged at the notches of the back plate. The display device includes the backlight module and a frame fixedly arranged on the periphery of the folded edge of the back plate.