Display Chassis Support Protrusions for PCB Protection and Grounding
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Solution Overview
Problem
Existing display apparatuses face issues with damage to printed circuit boards due to direct contact or improper support during assembly, which can lead to scratches and instability, and lack effective grounding to prevent electromagnetic interference and electrostatic discharge.
Innovation Solution
The display apparatus includes a chassis with support protrusions that allow the printed circuit boards to be soldered to the bottom chassis, providing stable support and extending the ground plane, thereby preventing damage and stabilizing electrical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the printed circuit board is directly supported during assembly, then the assembly process is simple, but the printed circuit board may be damaged due to direct contact or improper support
Solution Approach 1:
A support protrusion is introduced as an intermediary component between the chassis and the printed circuit board. This protrusion provides a dedicated support point that prevents direct contact between the chassis and the printed circuit board, thereby preventing damage while maintaining assembly simplicity. The support protrusion acts as a mediator that transfers mechanical support without creating harmful contact points.
2Reliability
If the printed circuit board is isolated from the chassis, then damage from direct contact is prevented, but grounding effectiveness is reduced
Solution Approach 1:
The grounding connection is segmented into multiple discrete contact points through multiple soldering portions rather than a single continuous connection. This segmentation allows the printed circuit board to be spatially separated from the chassis while maintaining electrical grounding through multiple controlled contact points, effectively balancing protection with grounding effectiveness.
Solution Approach 2:
The support protrusion serves as an intermediary that provides both mechanical support and electrical grounding functionality. By integrating these two functions into a single component, the design eliminates the need for separate grounding contacts while maintaining effective grounding, thus preventing electromagnetic interference and electrostatic discharge without compromising the protective isolation.
3Object-affected harmful factors
If multiple soldering portions are used to extend grounding, then electromagnetic interference and electrostatic discharge protection are improved, but the device complexity increases
Solution Approach 1:
Multiple functions are merged into the support protrusion: mechanical support, electrical grounding, and structural positioning are all integrated into a single component. This merging approach allows multiple soldering portions to be used for extended grounding without proportionally increasing overall device complexity, as the support protrusion itself becomes the grounding structure rather than requiring separate grounding elements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration ensures stable support and grounding, preventing circuit board damage and reducing electromagnetic interference, while enhancing electrostatic discharge protection and maintaining electrical stability.
Implementation Method 1
a support protrusion, that is bent, protruding from a rear surface of the cover body; and a substrate supported by the support protrusion
Implementation Method 2
the substrate is configured to be soldered to the chassis from one surface thereof
Implementation Method 3
extends grounding by electrically connecting a printed circuit board and a bottom chassis
Implementation Method 4
enhancing electrostatic discharge protection
Data Source
AI summary
A display apparatus includes a display panel that displays an image, and a light source that supplies light to the display panel. The light source is provided on a rear side of the display panel. A chassis is provided on a rear side of the light source, the chassis including a cover body covering a rear surface of the light source, and a support protrusion, that is bent, protruding from a rear surface of the cover body. A substrate is supported by the support protrusion and provided between the cover body and the support protrusion, wherein the substrate is soldered to the chassis from one surface thereof.