Display Device Mold Frame Coupling Structure
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Solution Overview
Problem
The coupling force between the mold frame and the bottom chassis in slim and lightweight LCD devices is weakened due to the reduced thickness of the bottom chassis support, leading to potential bending or breakage of the hook structure, resulting in poor coupling and stability issues.
Innovation Solution
A display device design that includes a bottom chassis with a bent support and a hemming unit overlapping the support, along with a protrusion on the mold frame that fits into a coupling hole on the bottom chassis, enhancing the coupling force in multiple axes by using a hemming unit disposed in an inserting groove and a protrusion that corresponds to the coupling hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of the bottom chassis support is reduced to achieve a slimmer structure, then the overall device thickness is reduced, but the coupling force between the mold frame and the bottom chassis is weakened
Solution Approach 1:
The coupling structure transitions from a single-plane hook connection to a multi-dimensional connection involving the protrusion extending in the thickness direction and the hemming unit providing additional constraint. This multi-dimensional coupling compensates for the reduced support thickness while maintaining slim device profile.
Solution Approach 2:
The coupling mechanism is divided into multiple functional elements: the protrusion for primary mechanical interlocking, the coupling hole for positioning, and the hemming unit for additional constraint. This segmentation allows each element to contribute specifically to coupling force without increasing overall thickness.
2Strength
If the thickness of the bottom chassis support is reduced, then the device becomes lighter and slimmer, but the mold frame or bottom chassis may bend at the coupling portion
Solution Approach 1:
The hemming unit extends in the thickness direction to provide multi-dimensional constraint, preventing bending at the coupling portion while maintaining the slim profile of the support structure.
Solution Approach 2:
The coupling region is locally reinforced through the protrusion and hemming unit configuration, providing enhanced structural stability at the critical coupling portion without increasing the overall thickness of the bottom chassis support.
3Length of moving object
If the thickness of the bottom chassis support is reduced, then the device achieves a narrower bezel, but the hook structure may break causing poor coupling
Solution Approach 1:
The coupling structure utilizes the thickness dimension through the protrusion and hemming unit to create a robust connection that prevents hook breakage, enabling narrow bezel design without compromising coupling reliability.
Solution Approach 2:
The coupling mechanism is segmented into multiple load-bearing elements (protrusion, coupling hole, hemming unit) that distribute mechanical stress, preventing concentration of force that could cause hook breakage in slim structures.
Data Source
AI summary
A display device includes: a display panel; a light source configured to supply light to the display panel; a bottom chassis comprising a lower portion, a support bent from the lower portion, and a hemming unit overlapping the support; and a mold frame coupled to the bottom chassis and comprising a protrusion, wherein the bottom chassis includes a coupling hole at the lower portion, the hemming unit is disposed on an upper surface of the mold frame, and the protrusion is inserted into the coupling hole.