Backlight Assembly Light Guide Plate Slit Support Thermal Deformation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Edge-type backlight assemblies for liquid crystal displays face issues with the light guide plate being damaged due to thermal deformation caused by heat from the light source unit, which affects the structural integrity and slimness of the display.
Innovation Solution
Incorporating a light guide plate with strategically positioned slits and supports within a lower cover to securely accommodate the light source unit, preventing movement and deformation of the light guide plate by matching the slit dimensions with cylindrical supports that protrude from the cover, thereby maintaining uniform spacing and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the light guide plate is used in edge-type backlight assembly, then the thickness is reduced and slimness is achieved, but the light guide plate is damaged due to thermal deformation from heat generated by light source unit
Solution Approach 1:
The light guide plate is segmented by forming slits that divide it into multiple regions. These slits allow the plate to expand and contract independently in different zones, preventing thermal deformation damage while maintaining the overall slim structure of the backlight assembly.
Solution Approach 2:
The support structure provides localized support at specific positions corresponding to the slits in the light guide plate. This localized support prevents excessive deformation at critical areas while allowing controlled thermal expansion in the slit regions, resolving the contradiction between slimness and structural integrity.
2Reliability
If the light guide plate is supported to prevent thermal deformation, then reliability is improved, but the structure becomes more complex
Solution Approach 1:
The support structure is integrated with the existing backlight assembly components rather than being added as separate elements. The supports are positioned to align with the slits in the light guide plate, combining the support function with the existing structural elements and minimizing additional complexity.
Solution Approach 2:
Instead of adding complex external support structures to prevent deformation, the solution inverts the approach by incorporating slits into the light guide plate itself and providing minimal support at key locations. This allows the light guide plate to accommodate thermal expansion through its own structure rather than relying on complex external constraints.
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 prevents damage to the light guide plate from thermal expansion, ensuring the backlight assembly maintains its slim structure and operational efficiency while protecting against heat-induced deformation.
Implementation Method 1
the light guide plate may be contracted or expanded widthwise along the light guide plate due to thermal deformation
Data Source
AI summary
Disclosed are a backlight assembly including a light guide plate having at least one slit, at least one light source unit disposed at a side of the light guide plate, and a lower cover which accommodates the light source unit and has at least one support coupled with the at least one slit.