Backlight Module Resilient Side Reflection Plate Thermal Expansion
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Solution Overview
Problem
Conventional backlight modules experience deformation and cracking of the light guide plate due to thermal expansion, and inadequate heat dissipation, leading to reduced lifespan and performance.
Innovation Solution
A backlight module design featuring a resilient side reflection plate to buffer thermal expansion and a metal light shield for enhanced heat dissipation, preventing light leakage and improving assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a rigid light shielding cover is used for heat dissipation, then heat dissipation performance is improved, but the light guide plate deforms and cracks due to thermal expansion constraint
Solution Approach 1:
The patent applies this principle by replacing the rigid light shielding cover with a flexible light shielding film that has light shielding properties. This flexible film can deform with the light guide plate during thermal expansion, preventing cracks while still providing heat dissipation functionality through its light shielding capability.
Solution Approach 2:
The patent changes the physical state parameter of the light shielding component from rigid to flexible. This parameter change allows the light shielding film to accommodate thermal expansion of the light guide plate while maintaining heat dissipation performance, resolving the contradiction between heat dissipation and structural integrity.
2Temperature
If the light guide plate is tightly engaged with the light shielding cover, then heat dissipation is enhanced, but the light guide plate is compressed and deforms under thermal expansion
Solution Approach 1:
The flexible light shielding film maintains tight engagement with the light guide plate for effective heat dissipation, while its flexibility allows it to deform with the light guide plate during thermal expansion, preventing shape distortion and cracks.
Solution Approach 2:
The flexible light shielding film acts as a cushioning element that anticipates and accommodates thermal expansion before it causes damage. The film's flexibility provides a buffer that absorbs expansion stresses, preventing deformation of the light guide plate.
3Object-affected harmful factors
If conventional rigid structures are used for light shielding, then light shielding effectiveness is achieved, but assembly complexity increases and installation is difficult
Solution Approach 1:
The flexible light shielding film replaces complex rigid light shielding structures, simplifying manufacturing and assembly. The film can be easily installed and removed, reducing assembly complexity while maintaining effective light shielding to prevent leakage.
Solution Approach 2:
The patent extracts the essential function of light shielding from the complex rigid structure, implementing it through a simple flexible film that provides light shielding effectiveness without the complexity of rigid assemblies, enabling easy installation and removal.
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 design effectively prevents light guide plate deformation, extends module lifespan, and enhances heat dissipation, resulting in improved performance and quality.
Implementation Method 1
a side reflection plate arranged between the light guide plate and the backlight source... The side reflection plate comprises a plurality of openings formed therein to correspond to the LED lights. The LED lights are receivable in the openings to serve as light sources of the light guide plate.
Implementation Method 2
The side reflection plate has resiliency... effectively prevents deformation or cracking of a light guide plate caused by compression resulting from thermal expansion
Implementation Method 3
a metal light shield for enhanced heat dissipation... The light shield is made of a metal material and the LED substrate is positioned against the light shield.
Data Source
AI summary
The present invention provides a backlight module, which includes: a backplane (2), a light guide plate (4) arranged in the backplane (2), a backlight source (6) arranged in the backplane (2) and located at one side of the light guide plate (4), a light shield (8) arranged between the backlight source (6) and the backplane (2), and a side reflection plate (10) arranged between the light guide plate (4) and the backlight source (6). The backlight source (6) includes an LED substrate (62) and a plurality of LED lights (64) mounted on the LED substrate (62). The side reflection plate (10) has resiliency. The side reflection plate (10) includes a plurality of openings (102) formed therein to correspond to the LED lights (64). The LED lights (64) are receivable in the openings (102) to serve as light sources of the light guide plate (4).