Backlight Module Light Guide Plate Curved Surface Design
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Solution Overview
Problem
Conventional LCD backlight modules are heavy, costly, and inefficient due to their rectangular shape and the need for additional components like reflecting plates, which increase weight and reduce portability and light efficiency.
Innovation Solution
A backlight module with a light guide plate featuring concave surfaces on its sides and lower surface to accommodate the lamp tube, combined with a back plate that includes inclined and curved surfaces and mirror-polished reflective surfaces to enhance light collection and reduce weight and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rectangular parallelepiped light guide plate is used, then the structural stability is improved, but the weight increases
Solution Approach 1:
The light guide plate employs curved surfaces including an arc-shaped first side surface, arc-shaped second side surface, and arc-shaped lower surface. This curvature design reduces the overall weight of the light guide plate while maintaining structural integrity and stability, directly resolving the contradiction between structural stability and weight reduction.
2Illumination intensity
If lamp covers and reflecting plates are added, then the light efficiency is improved, but the cost increases
Solution Approach 1:
The patent integrates the light-redirecting function directly into the light guide plate's own structure through its specially designed curved surfaces, rather than using separate lamp covers and reflecting plates. The first side surface redirects light at a first angle, the second side surface at a second angle, and the lower surface at a third angle, combining multiple functions into a single component, thus reducing cost while maintaining light efficiency.
Solution Approach 2:
The invention extracts and eliminates the need for separate lamp covers and reflecting plates by incorporating their light-redirecting functions directly into the light guide plate's geometry. This extraction of unnecessary components reduces device complexity and cost while the light guide plate's curved surfaces continue to perform the essential light redirection function.
3Illumination intensity
If lamp covers and reflecting plates are added, then the light efficiency is improved, but the weight increases
Solution Approach 1:
The patent merges the light-redirecting function of lamp covers and reflecting plates into the light guide plate itself through its curved surfaces. The first side surface, second side surface, and lower surface collectively perform light redirection that would otherwise require separate components, thereby reducing weight while maintaining light efficiency.
4Ease of manufacture
If conventional light guide plate structure is used, then the manufacturing simplicity is improved, but the light utilization efficiency decreases
Solution Approach 1:
The light guide plate uses curved surfaces including arc-shaped first and second side surfaces and an arc-shaped lower surface to optimize light redirection. These curved geometries improve light utilization efficiency by redirecting light at optimized angles while remaining manufacturable through standard molding processes, thus resolving the contradiction between manufacturing simplicity and light utilization efficiency.
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 novel structure reduces the weight and cost of the backlight module by up to 30% and 20% respectively, while improving light utilization efficiency and reducing energy consumption.
Implementation Method 1
a back plate that includes inclined and curved surfaces and mirror-polished reflective surfaces to enhance light collection
Data Source
AI summary
An embodiment of the present invention relates to a backlight module comprising a back plate, a light guide plate provided on the back plate and a light source provided at a side of the light guide plate. A side and lower surface of the light guide plate facing the lamp tubes is a concave surface. The weight of the backlight module and the cost can be largely reduced without change of the light efficiency.