Backlight Module Bezel Reduction via Groove Clamping
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Solution Overview
Problem
The existing die-cast aluminum backlight structures have a large bezel due to the need for a mold frame to be internally clamped and supported, which limits the design's ability to achieve a narrow bezel.
Innovation Solution
A backlight module design featuring a backplane with grooves for the mold frame's bezels to be clamped into, eliminating the need for a side wall and allowing the bezels to be positioned above the light guide plate without overlapping, thus reducing the bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a mold frame is internally clamped in a backplane with a side wall extending to support it, then the mold frame is prevented from turning inwards, but the bezel size becomes large
Solution Approach 1:
The invention transitions from a side wall support structure (horizontal dimension) to a groove-based clamping structure (vertical dimension). The groove is formed on the inner side of the backplane, allowing the mold frame to be clamped from above rather than requiring lateral support, thereby reducing bezel size while maintaining stability.
Solution Approach 2:
The invention uses a thin groove structure instead of a thick side wall. The groove has a depth and width that are sufficient to clamp the mold frame but occupy minimal space, effectively replacing the bulky side wall support with a compact groove feature.
2Stability of the object's composition
If a side wall is added to support the mold frame, then the mold frame is prevented from tripping upwards, but the module bezel size increases
Solution Approach 1:
The invention moves the support function from the lateral dimension (side wall) to the vertical dimension (groove depth). The groove extends into the backplane thickness, providing upward support and preventing tripping without requiring lateral extension that would increase bezel size.
Solution Approach 2:
The invention combines the support and clamping functions into a single groove structure. The groove simultaneously prevents upward tripping and inward turning by providing both vertical support and lateral constraint, eliminating the need for separate side wall support.
3Reliability
If space is ensured between the light guide plate and mold frame for expansion, then the light guide plate and diaphragm can expand, but the bezel size becomes large
Solution Approach 1:
The invention provides expansion space locally within the groove structure rather than requiring global bezel extension. The groove depth and width are designed to accommodate light guide plate and diaphragm expansion in specific areas without increasing the overall module bezel size.
Data Source
AI summary
A backlight module and a display device. The backlight module includes: a back plate, wherein the back plate has a bottom plate and a plurality of side plates, the side plates cooperate with the bottom plate to form an accommodating space, and the side of each of the side plates facing the accommodating space is provided with a groove having an opening facing the accommodating space; and a mold frame, includes bezels in one-to-one correspondence with the plurality of side plates; in each group of a side plate and a bezel, the bezel includes a clamping part, a supporting part and a limiting part, the clamping part is located at a side of the limiting part away from the accommodating space, and is embedded into the groove to clamp with the groove.