Liquid Crystal Display Bezel Fixing via External Projection
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Solution Overview
Problem
Conventional liquid crystal display modules face challenges in slimming the bezel design due to the length of bolts required for internal threading, which increases the thickness and hinders the reduction of the bezel's slimness.
Innovation Solution
The design incorporates a projection on the side board of the backplane forming a threaded hole and a receiving hole in the bezel's side wall, with a bolt securing them together, allowing for bezel slimming by reducing the bezel's thickness through drawing tapping, and an outward-projecting engagement section with a slope to facilitate assembly without deforming the projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drawing and tapping are made on the inner side of the module to fix the bezel to the backplane, then the threading engagement is achieved inside the module, but the bolt length becomes equal to the sum of bezel thickness, backplane thickness, and drawing height, which increases the required space and hinders bezel slimming
Solution Approach 1:
The patent inverts the conventional fixing approach by moving the drawing and tapping operations from the inner side to the outer side of the module. The projection is formed on the outer surface of the backplane, and the threaded hole is formed on the inner surface of the bezel, allowing the bolt to engage externally rather than requiring internal threading that spans the entire module thickness.
Solution Approach 2:
The patent changes the spatial dimension of the fixing mechanism by transitioning from internal threading (one-dimensional engagement through the thickness) to external projection engagement (two-dimensional engagement at the surface). This allows the fixing function to be achieved with a shorter bolt length while maintaining reliability.
2Length of stationary object
If the bezel thickness is reduced for slim design, then the device achieves a slimmer profile, but the internal threading space becomes insufficient and requires longer bolts that counteract the slimming effect
Solution Approach 1:
The patent resolves this contradiction by inverting the fixing structure configuration. Instead of creating internal threads that require significant thickness, the projection is formed on the backplane surface and the threaded hole is created in the bezel, allowing engagement with minimal bezel thickness while maintaining structural integrity.
Solution Approach 2:
The fixing structure is segmented into distinct functional elements: a projection on the backplane, a threaded hole in the bezel, and a bolt for engagement. This segmentation allows each component to be optimized independently, enabling thin bezel design while maintaining reliable fixing capability.
3Ease of manufacture
If drawing tapping is performed on the side board to form a projection, then the projection can be received in the receiving hole for securing, but the process requires precise alignment and positioning to avoid deformation
Solution Approach 1:
The patent applies preliminary action by pre-forming the projection on the backplane side board through drawing tapping before final assembly. This allows the projection to be precisely formed in advance, ensuring accurate positioning and alignment when the bezel is assembled, thereby reducing the risk of deformation during the final securing process.
Data Source
AI summary
The present invention provides a liquid crystal display module, which includes a backlight module, a mold frame arranged on the backlight module, a liquid crystal display panel arranged on the mold frame, and a bezel arranged on the liquid crystal display panel and fixed to the backlight module. The backlight module includes a backplane. The backplane includes a bottom board and a side board connected to the bottom board. The bezel includes a front wall and a side wall connected to the front wall. The side board forms a projection toward the side wall. The projection forms a threaded hole. The side wall forms a receiving hole corresponding to the projection. The projection is completely received in the receiving hole and secured to the receiving hole by a bolt.