Backlight Module Metal Back Plate Bending Structures Flatness
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Solution Overview
Problem
Conventional backlight modules with an iron-plastic integrated design face challenges in achieving a high level of flatness for the back plate, which is essential for narrow frame designs in display devices, leading to increased production costs and complexity.
Innovation Solution
A backlight module design without a plastic frame, featuring a metal back plate with bending structures and light-shielding tapes to accommodate the light source, simplifies the manufacturing process, enhances flatness, and improves heat dissipation, while maintaining the structural integrity and bonding strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If an iron-plastic integrated design is adopted to reduce frame size, then the frame width can be reduced, but the flatness of the back plate deteriorates
Solution Approach 1:
The back plate is segmented into a metal back plate body and separate bending structures (first and second bending structures) that are independently formed and then assembled. This segmentation allows each component to be optimized separately - the metal back plate for flatness and the bending structures for frame reduction - resolving the contradiction between narrow frame and high flatness
Solution Approach 2:
The patent combines the metal back plate with bending structures through bonding to create an integrated assembly that achieves both narrow frame width and high flatness. The bending structures are merged with the back plate body to form a unified support structure that maintains dimensional stability while enabling compact design
2Strength
If an iron-plastic integrated design with plastic frame is used, then structural support can be provided, but production cost and complexity increase due to injection molding requirements
Solution Approach 1:
The patent extracts the plastic frame component from the design and replaces it entirely with metal bending structures. This elimination of the plastic injection molding process removes the associated high production costs and complexity while maintaining structural support through the metal bending structures bonded to the back plate
Solution Approach 2:
The patent changes the material parameter from plastic to metal for the framing structures. This material substitution eliminates the need for injection molding while providing adequate structural support, thereby reducing production cost and complexity
Data Source
AI summary
A backlight module includes a back plate including a back plate body and a first bending structure perpendicular to the back plate body. The backlight module includes a light source. On a side at which the light source is disposed, the back plate further includes a second bending structure connected to the first bending structure and extending in the same direction as the back plate body. The second bending structure includes a plurality of spaced protrusion portions, and a depressed portion between the adjacent protrusion portions configured to accommodate a light emitting portion of the light source.