Backlight System Printed Board Through-Holes Weight Reduction
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Solution Overview
Problem
Conventional backlight systems for large liquid crystal displays face issues with excessive weight due to large printed boards, which compromises their practicality without adequately addressing light reflection efficiency.
Innovation Solution
The proposed backlight system incorporates a printed board with a grid pattern of through-holes to reduce weight, coupled with a cover member featuring a reflective surface to maintain high light reflection efficiency, allowing for efficient light distribution and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a large-size printed board is used to support the backlight system for a large liquid crystal display, then the structural integrity and light reflection capability are maintained, but the weight becomes excessive
Solution Approach 1:
The printed board is designed with multiple through-holes penetrating its thickness, creating a porous structure that significantly reduces the weight of the printed board while maintaining its structural integrity and light reflection capability through the surrounding frame member and reflective coating
Solution Approach 2:
The printed board is segmented by dividing it into multiple regions separated by through-holes, creating a grid-like pattern that reduces material usage and weight while the frame member and reflective coating ensure continuous light reflection across the entire surface
2Weight of moving object
If through-holes are added to reduce printed board weight, then weight is reduced, but light reflection efficiency may be compromised
Solution Approach 1:
A frame member with high light reflectivity is introduced as an intermediary element that surrounds each through-hole and provides continuous light reflection paths, compensating for the potential light loss caused by the through-holes and ensuring overall light reflection efficiency is maintained
Solution Approach 2:
The light reflection property is locally enhanced by applying reflective coating specifically to the inner surfaces of the through-holes and the frame member, ensuring that light reflection efficiency is maintained in critical areas while the overall board weight is reduced
3Loss of energy
If a frame member with reflective surface is added to maintain light reflection efficiency, then light reflection is improved, but device complexity increases
Solution Approach 1:
The frame member is designed to simultaneously serve multiple functions: providing structural support for the printed board, acting as a light reflective surface, and defining the boundaries of the through-holes, thereby reducing overall device complexity despite the addition of the frame structure
Solution Approach 2:
The frame member is designed as a multi-functional component that provides structural support, light reflection, and spatial definition simultaneously, reducing the need for separate components and thereby offsetting the increase in device complexity
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
This design effectively reduces the weight of the printed board while preserving light reflection efficiency and enhancing heat dissipation, making it suitable for large liquid crystal displays.
Implementation Method 1
a cover member (18) mounted on the upper surface of the printed board (12) to cover the through-holes (20). The cover member (18) has a reflection surface (21)
Implementation Method 2
The backlight system includes a plurality of through-holes (20) provided in the printed board (12) to reduce a weight of the printed board (12)
Data Source
AI summary
A backlight system including a printed board, a plurality of light sources mounted on a surface of the printed board, a frame member disposed to surround the plurality of light sources, a plurality of through-holes provided in the printed board to reduce weight of the printed board, and a cover member disposed on the printed board to cover the plurality of through-holes, whereby accomplishing great reduction in weight of the printed board without lowering reflection efficiency of light emitted from the light sources and providing a backlight system capable of effectively using for a large liquid crystal display.