Segmented Reflection Structure for Backlight Module Heat Deformation
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Solution Overview
Problem
Backlight modules in liquid crystal display devices experience deformation near the light source due to heat, leading to non-uniform reflection and compromised display effects.
Innovation Solution
A reflection structure comprising a first reflection plate and at least one second reflection plate, where the end close to the light source of the first plate can extend freely, and the second plate overlaps and extends towards the side edge of the back plate, preventing deformation and ensuring uniform light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reflection plate is used near the light source, then the structure is simple, but heat causes deformation and non-uniform reflection
Solution Approach 1:
The reflection plate is divided into a first reflection plate and a second reflection plate. The first reflection plate is positioned away from the light source and has its reflection surface facing the light guide plate. The second reflection plate is positioned near the light source with its reflection surface facing the first reflection plate. This segmentation allows the second plate to handle heat exposure separately, preventing deformation of the primary reflection surface and maintaining uniform light reflection.
2Use of energy by moving object
If the reflection plate extends close to the light source, then light collection is improved, but heat-induced deformation occurs
Solution Approach 1:
The reflection system is segmented into two plates where the second reflection plate (near the light source) can be designed with appropriate length to collect light effectively, while the first reflection plate (away from the light source) maintains stable shape for uniform reflection. The segmentation isolates the heat-affected zone to the second plate only.
Solution Approach 2:
The second reflection plate acts as an intermediary between the light source and the first reflection plate. It reflects light from the light source to the first reflection plate, which then directs the light to the light guide plate. This intermediary arrangement protects the primary reflection surface from direct heat exposure while maintaining light collection efficiency.
3Manufacturing precision
If the reflection plate is constrained rigidly, then positioning is precise, but heat causes deformation
Solution Approach 1:
The reflection plate is segmented into two independently positioned plates. The first reflection plate can be precisely positioned and constrained for stable reflection, while the second reflection plate near the light source can be designed with appropriate constraints that account for thermal effects, allowing each segment to be optimized for its specific thermal environment.
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 effectively addresses the deformation issue, enhancing light use efficiency and improving display quality by maintaining uniform reflection and preventing heat-induced distortions in the reflection structure.
Implementation Method 1
at least one second reflection plate disposed on an edge of the first reflection plate; a first end of the second reflection plate overlaps the first reflection plate, and a second end of the second reflection plate extends toward the side edge of the back plate
Implementation Method 2
a first reflection plate disposed on the back plate, an end close to the light source of which can extend freely
Implementation Method 3
converting a common point light emitter or a linear light emitter to a uniform high brightness surface light emitter through an effective optical structure
Data Source
AI summary
A reflection structure, a backlight module and a display device, the backlight module comprises a light source and a back plate and the light source is disposed on a side edge of the back plate, the reflection structure comprises: a first reflection plate disposed on the back plate, an end close to the light source of which can extend freely; and at least one second reflection plate disposed on an edge of the first reflection plate, wherein a first end of the second reflection plate overlaps the first reflection plate, a second end of the second reflection plate extends toward the side edge of the back plate, and at least one of the first end and the second end of the second reflection plate can extend freely.