Backlight Assembly Bottom Receiving Plate Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In flat panel displays, the temperature differences caused by uneven heat dissipation in backlight assemblies lead to brightness variations, resulting in defects such as stains and undesirable visual effects.
Innovation Solution
A backlight assembly with a bottom receiving plate featuring a plurality of openings that efficiently dissipate heat and support the light guiding plate, maintaining uniform brightness, while reducing the overall size and weight of the display apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the bottom receiving plate fully supports the light guiding plate to improve structural stability, then the temperature difference increases causing brightness non-uniformity, but if the bottom receiving plate is reduced in size to improve brightness uniformity, then the structural support is weakened
Solution Approach 1:
The bottom receiving plate is segmented by introducing multiple openings (through-holes or recesses) into its structure. This segmentation reduces the continuous metal area that conducts heat, thereby minimizing temperature differences across the plate while maintaining sufficient structural support through the distributed opening pattern.
Solution Approach 2:
The bottom receiving plate is designed with a porous-like structure containing multiple openings. This allows the plate to maintain mechanical strength while reducing heat conduction pathways, creating a balance between structural support and thermal management for improved brightness uniformity.
2Temperature
If the bottom receiving plate is made larger to improve heat dissipation, then the device size and weight increase, but if it is made smaller to reduce size and weight, then heat dissipation efficiency decreases
Solution Approach 1:
The bottom receiving plate incorporates multiple openings to create a porous-like structure that enhances heat dissipation efficiency. This design allows effective thermal management without increasing the overall plate size or weight, as the openings provide additional heat release pathways within the existing structural footprint.
Solution Approach 2:
The design changes the thermal parameters of the bottom receiving plate by introducing openings that modify heat conduction and convection characteristics. This enables improved heat dissipation efficiency while maintaining or reducing the plate's physical dimensions and weight.
3Length of stationary object
If the bottom receiving plate is made larger to improve structural support, then the device width increases, but if it is made smaller to reduce device width, then the structural support and heat dissipation are compromised
Solution Approach 1:
The bottom receiving plate is segmented with multiple openings that allow the structure to maintain adequate support capability while reducing the overall material usage and device width. The segmented pattern provides structural integrity at reduced dimensions.
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 dissipates heat and maintains uniform brightness across the display, reducing temperature differences and improving the structural support for the light guiding plate, thereby minimizing defects and enhancing display performance.
Implementation Method 1
Heat generated from the light source is conducted to the bottom receiving plate
Data Source
AI summary
A backlight assembly includes a light guiding plate, a light source and a bottom receiving plate. The light source is disposed at a first side of the light guiding plate. The bottom receiving plate includes a bottom surface and a side wall to form a receiving space in which at least a portion of the light guiding plate is placed. The bottom surface is smaller than a lower surface of the light guiding plate and has a plurality of openings formed through the bottom surface. The side wall extends from the bottom surface.