Backlight Module Narrow Border Design via Positioning Block
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Solution Overview
Problem
Existing liquid crystal display devices face challenges in achieving a narrow border design while maintaining mechanical strength and cooling performance, as previous methods either compromise mechanical strength by removing the back plate or only partially address the narrow border design by reducing the plastic frame or sidewall width, which affects cooling performance.
Innovation Solution
A backlight module design featuring a plastic frame, a back frame, and a positioning block with a supporting portion and bump structure, where the positioning block is embedded into a hole on the plastic frame to secure the frames together, enhancing positioning and cooling performance, and using a metal back frame for improved thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the back plate is eliminated to achieve narrow border design, then the border width is reduced, but the mechanical strength of the backlight module is greatly reduced
Solution Approach 1:
The back plate is segmented into a metal back frame with sidewalls, where the sidewalls provide structural support and positioning functions. This segmentation allows the border width to be reduced while maintaining mechanical strength through the positioned sidewalls.
Solution Approach 2:
The metal back frame's sidewalls serve multiple functions: providing mechanical support, enabling narrow border design, and facilitating heat dissipation. This multi-functionality resolves the contradiction by making the sidewalls承担 both structural and thermal roles.
2Length of moving object
If the plastic frame or sidewall width is reduced to achieve narrow border design, then the border width is reduced, but the cooling performance of the backlight module is affected
Solution Approach 1:
The backlight module uses a composite structure combining plastic frame and metal back frame. The metal back frame provides superior thermal conductivity for heat dissipation, while the plastic frame provides structural support. This composite material approach enables narrow border design without compromising cooling performance.
Solution Approach 2:
The metal back frame acts as an intermediary heat dissipation pathway, conducting heat away from the light guide plate and other components. This intermediary structure enables effective cooling even when the plastic frame width is reduced for narrow border design.
3Temperature
If the light source is designed on the sidewall of the back plate to achieve narrow border design and enhance cooling performance, then the cooling performance is improved, but the plastic frame and front frame cannot achieve effective positioning
Solution Approach 1:
The metal back frame's sidewalls provide self-positioning features that enable the plastic frame and front frame to be accurately positioned during assembly. The sidewalls include positioning structures that guide and secure the frames without requiring additional positioning components.
Solution Approach 2:
The metal back frame serves as an intermediary positioning structure, with its sidewalls providing reference surfaces and positioning features for the plastic frame and front frame. This intermediary structure ensures accurate positioning while maintaining the narrow border design and cooling performance.
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 solution achieves a narrow border design while maintaining mechanical strength and enhancing cooling performance by securely fixing the frames and utilizing a metal back frame for better thermal management, ensuring effective positioning and aesthetic appeal.
Implementation Method 1
The other mean is that the light source is designed on the sidewall of the back plate so as to achieve the narrow boarder design, and enhance the whole cooling performance of the backlight module
Implementation Method 2
a first positioning hole corresponding to the positioning block is disposed on a sidewall of the plastic frame, and the positioning block is embedded into the first positioning hole to fix the plastic frame to the back frame
Data Source
AI summary
The present invention discloses a backlight module, comprising a plastic frame, a back frame and a positioning block, where the positioning block is fixed on the outer surface of the sidewall of the back frame, the supporting portion of the plastic frame is disposed on the back frame, the first positioning hole corresponding to the positioning block is disposed on the sidewall of the plastic frame, and the positioning block is embedded into the first position hole to fix the plastic frame and the back frame together. The present invention also discloses a liquid crystal display device having the backlight module. The backlight module and the liquid crystal display device of the present invention achieve the narrow boarder design, also own good positioning for the plastic frame and the outer frame, and even enhance the whole cooling performance of the backlight module.