Bottom Chassis Sub-Side Surfaces for Display Coupling
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Solution Overview
Problem
The narrow bezel structure in display devices has reduced the coupling force between the bottom chassis, mold frame, and top chassis, leading to increased defects and instability in the display device components.
Innovation Solution
The display device incorporates a bottom chassis with specific geometric configurations, including multiple sub-side surfaces and sub-bottom side surfaces, and side walls that expose certain sub-bottom side surfaces, which improves the coupling force between the mold frame and the bottom chassis, reducing interference and defects during fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a narrow bezel structure is applied to reduce the size of the peripheral portion, then the size of the display device is reduced, but the coupling force between the bottom chassis, mold frame, and top chassis is reduced
Solution Approach 1:
The bottom chassis is divided into a first bottom portion and a second bottom portion, with the first bottom portion further divided into multiple first bottom portions in corners. This segmentation allows each portion to have specialized coupling structures (different numbers of coupling protrusions) that collectively enhance the overall coupling force despite the narrow bezel design.
Solution Approach 2:
Different corner portions of the bottom chassis are assigned different numbers of coupling protrusions (first, second, third, or fourth coupling protrusions) based on their specific positions and structural requirements. This local differentiation optimizes the coupling force distribution across the narrow bezel structure, ensuring adequate strength in each region.
2Volume of moving object
If the coupling force between components is reduced to achieve a narrow bezel, then the display device size is reduced, but defects increase during fabrication
Solution Approach 1:
The bottom chassis is designed with pre-formed coupling protrusions and coupling recesses that are integrated into the injection molding process. These preliminary structural features ensure proper alignment and coupling between the mold frame and bottom chassis during fabrication, reducing defects caused by misalignment or insufficient coupling force.
3Strength
If the structural complexity of the bottom chassis is increased to improve coupling force, then the coupling force increases, but the device complexity increases
Solution Approach 1:
The coupling protrusions and coupling recesses are integrated directly into the bottom chassis structure during injection molding, merging the coupling function with the chassis structure itself. This eliminates the need for separate coupling components, thereby increasing coupling force while minimizing the overall device complexity.
Data Source
AI summary
A display device includes a display panel and a backlight unit including a bottom chassis including a bottom portion and a side wall, the bottom portion of the bottom chassis including a first bottom portion disposed in a corner portion of the bottom portion and including a first bottom side surface and a second bottom side surface, and a second bottom portion connected to the first bottom portion, the first bottom side surface of the first bottom portion including a first sub-bottom side surface and a second sub-bottom side surface including a third sub-bottom side surface and a fourth sub-bottom side, where the side wall of the bottom chassis is connected perpendicularly to the bottom portion and exposes at least one of the second sub-bottom side surface and the fourth sub-bottom side surface.