Backlight Module Positioning Columns Prevent Light Guide Plate Expansion Damage
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Solution Overview
Problem
Liquid crystal display devices face damage due to expansion of the light guide plate caused by heat or moisture absorption, which can lead to extrusion and damage of the light source components.
Innovation Solution
A backlight module design featuring a light guide plate with positioning holes and columns that create spaces between quantum dot fluorescent tubes and the plate's surfaces, preventing extrusion and damage while enhancing optical coupling efficiency by uniformly distributing forces and minimizing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the light guide plate is made larger to improve display area, then the display area is improved, but the light guide plate is more prone to expansion damage from heat or moisture
Solution Approach 1:
The light guide plate is divided into multiple segments by positioning holes and positioning columns. These positioning structures segment the plate into distinct regions that can independently accommodate expansion, preventing uniform expansion damage across the entire large plate while maintaining the desired display area.
2Reliability
If the light source is arranged closer to the light guide plate to improve optical coupling, then optical coupling efficiency is improved, but the light source is more vulnerable to extrusion damage from plate expansion
Solution Approach 1:
Positioning columns serve as intermediary structures between the light source and the light guide plate. These columns provide a buffer zone that absorbs expansion forces, protecting the light source from direct extrusion damage while maintaining close proximity for optimal optical coupling.
Solution Approach 2:
Positioning holes and positioning columns are pre-configured in the light guide plate to create cushioning spaces before expansion occurs. These pre-established structures absorb and distribute expansion forces, preventing sudden extrusion damage to the light source while maintaining stable optical coupling.
3Reliability
If positioning structures are added to prevent expansion damage, then light source protection is improved, but device complexity increases
Solution Approach 1:
The positioning columns and positioning holes serve multiple functions simultaneously: they provide mechanical support for the light source, accommodate plate expansion, prevent extrusion damage, and maintain optical coupling. This multi-functionality reduces the need for additional separate protection structures, thereby limiting the increase in device complexity while achieving reliable light source protection.
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 protects light emitting diodes from damage, maintains optical efficiency, and prevents uneven force-induced damage to the light guide plate, ensuring reliable operation and improved light coupling.
Implementation Method 1
The first quantum dot fluorescent tubes are arranged between the first blue emitting diodes and the first surface. The second quantum dot fluorescent tubes are arranged between the second blue emitting diodes and the second surface.
Data Source
AI summary
The disclosure provides a backlight module and a display device. The backlight module comprises a light guide plate having a first surface and a second surface intersecting with the first surface, a first light bar, a second light bar, and first positioning columns. First positioning holes is formed on the first surface. The first light bar comprises a first substrate arranged close to the first surface, first blue emitting diodes arranged on the first substrate, and first quantum dot fluorescent tubes arranged close to the first surface. The second light bar comprises a second substrate arranged close to the first surface, second blue light emitting diodes arranged on the second substrate, and second quantum dot fluorescent tubes arranged close to the second surface. The first positioning columns are arranged between the first quantum dot fluorescent tubes and the first surface such that a first space is formed there between.