Backlight Module Backboard Weight Reduction via Segmented Frame
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Solution Overview
Problem
Conventional backboards in display technology are heavy and costly due to their thick metal construction, posing challenges in achieving a lightweight and cost-effective design without compromising the supporting mechanism.
Innovation Solution
A backboard structure comprising a frame with L-shaped members and a light-shield plate, where the frame defines an empty central part and includes support means such as ribs and troughs for reinforcement, and the light-shield plate, which can be made of plastic or metal foil, is used to reduce weight and cost while maintaining structural integrity and providing light-shielding and heat-dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick metal board is used for the backboard, then the supporting mechanism is strengthened, but the weight and cost increase
Solution Approach 1:
The backboard is segmented into multiple functional components: a frame structure with plates and ribs for support, and a separate light-shield plate for optical function. This segmentation allows each component to be optimized independently, reducing overall weight while maintaining strength.
Solution Approach 2:
The invention uses composite construction combining the frame (providing structural support) with the light-shield plate (providing optical shielding). This composite approach replaces the traditional monolithic thick metal board with a multi-material assembly that achieves equivalent or superior performance at reduced weight.
2Strength
If a thick metal board is used for the backboard, then the supporting mechanism is strengthened, but the cost increases
Solution Approach 1:
Dividing the backboard into separate frame and light-shield plate components allows for more efficient manufacturing processes, potentially using different materials and fabrication methods optimized for each part, thereby reducing overall manufacturing cost.
Solution Approach 2:
The composite structure enables the use of cost-effective materials for each component based on its specific functional requirements, rather than using expensive thick metal throughout the entire backboard assembly.
3Weight of moving object
If the backboard structure is simplified to reduce weight, then the weight decreases, but the supporting mechanism may be compromised
Solution Approach 1:
The frame structure incorporates ribs at specific locations to provide localized reinforcement where structural support is needed, rather than uniformly thickening the entire backboard. This allows weight reduction in non-critical areas while maintaining strength where required.
Solution Approach 2:
The frame structure utilizes three-dimensional spatial arrangement with vertical plates and horizontal ribs creating a lattice-like configuration that provides high strength-to-weight ratio by distributing loads across multiple dimensions.
Data Source
AI summary
A backlight module includes a front frame, a backboard, and a light source. The front frame and the backboard define opposite outermost surfaces of the backlight module. The backboard includes a frame and a light-shield plate. The frame is coupled with the front frame. The frame has a plurality of plates surroundingly defining an empty part and at least one side wall extending from one of the plates to be coupled with the front frame. Each one of the plates has a first surface, a second surface opposite to the first surface, and at least one rib and/or trough, and the rib and/or trough is disposed on the first surface and is spaced apart from the side wall. The light-shield plate covers the empty part. The light source is disposed between the front frame and the backboard.