Display Back Case Segmentation for EMI Shielding
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Solution Overview
Problem
Conventional display apparatuses suffer from electromagnetic interference (EMI) due to the close installation of video boards and electronic circuit components, leading to reduced image quality and complex maintenance structures.
Innovation Solution
A display apparatus design featuring a base board with a tuner-mounted video board and electronic circuit components, where a detachable sub-case with a shield plate and bracket terminal is used to block EMI, allowing for easy maintenance and upgrade by separating the video board from the circuit components and preventing electromagnetic wave leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the video board and electronic circuit components are installed close to each other without a barrier, then the device structure is simple and easy to manufacture, but electromagnetic interference occurs causing sustained noise and reducing image quality
Solution Approach 1:
The back case is divided into a main case and a sub-case that can be detached. The sub-case is specifically designed to house the video board separately from the electronic circuit components, creating physical segmentation that prevents electromagnetic interference while maintaining manufacturing simplicity through modular assembly
Solution Approach 2:
The sub-case acts as an intermediary structure between the video board and the electronic circuit components. It provides a shielded enclosure that isolates the video board from electromagnetic sources while allowing the components to remain in close proximity for compact design
2Object-affected harmful factors
If a shield case with built-in video board is used to break electromagnetic interference, then electromagnetic interference is reduced, but the device complexity increases and after-sale maintenance becomes difficult
Solution Approach 1:
The back case is segmented into a main case and a detachable sub-case. This segmentation allows the video board to be isolated in a separate sub-case that can be easily removed for maintenance, reducing device complexity compared to a fully integrated shield case while still providing EMI protection
Solution Approach 2:
The sub-case is designed with detachable connections to the main case, transforming the static shield structure into a dynamic, reconfigurable system. This allows the sub-case to be easily removed for maintenance or replacement without disassembling the entire device, simplifying after-sale service
3Object-affected harmful factors
If the video board is separated from electronic circuit components, then electromagnetic interference is prevented, but the device structure becomes more complex
Solution Approach 1:
The back case is divided into a main case for electronic circuit components and a sub-case for the video board. This segmentation achieves electromagnetic isolation while maintaining structural simplicity through standardized connection interfaces and modular design
Solution Approach 2:
The sub-case is nested within or attached to the main case structure, with the video board positioned inside the sub-case enclosure. This nesting arrangement provides EMI protection while minimizing the overall increase in device complexity by utilizing existing structural space
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
The solution effectively prevents electromagnetic interference, enhancing image quality and facilitating convenient maintenance and upgrades by isolating the video board from electronic circuit components, thus improving the overall performance and usability of the display apparatus.
Implementation Method 1
a shield plate combined with the main case and blocking electromagnetic interference between the video board and the electronic circuit components
Implementation Method 2
a bracket terminal combined to the shield plate, preventing electromagnetic waves from the video board from leaking out
Data Source
AI summary
A display apparatus having a base board in which a tuner-mounted video board and various circuit components are electrically connected, and a back case, connected to the base board and protecting the video board and the circuit components, wherein the back case has: a main case covering the electronic circuit components; and a sub-case detachably connected to the main case, mounted with the video board, and blocking electromagnetic interference between the video board and the electronic circuit components. With this configuration, the present invention provides a display apparatus with a high quality of a picture image, that prevents a sustain noise by blocking electromagnetic interference between the video board and electric circuit components. The present invention also provides convenient access for after-sale maintenance and upgrade of the video board and the electric circuit components.