Display Device Metal Frame Noise Shielding via Contact Part
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Solution Overview
Problem
Existing display devices in navigation systems face challenges in effectively reducing noise generated by electronic components, particularly due to the complexity of the grounding metal fitting required, which limits its applicability to slidably attached control boards.
Innovation Solution
A display device design that includes a contact part between the display panel unit and a metal frame, which is grounded, utilizing springs and additional copper foils to enhance noise shielding by increasing the contact area and providing a conductive path for noise to flow through the frame, thereby reducing noise influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a grounding metal fitting is used to prevent radiation noise, then noise reduction is improved, but the structure becomes complex and applicability is limited to slidably attached control boards
Solution Approach 1:
The metal frame serves multiple functions: it provides structural support for the display panel unit, acts as a grounding element, and functions as a noise shielding barrier. This multi-functional design eliminates the need for separate grounding fittings and makes the solution applicable to various mounting types, not just slidable control boards.
Solution Approach 2:
The invention combines the grounding function and noise shielding function into the existing metal frame structure. By making the metal frame electrically connected to ground and positioning it to contact both the display panel unit and the housing, it simultaneously provides mechanical support, electrical grounding, and electromagnetic shielding without requiring additional components.
2Object-affected harmful factors
If a grounding metal fitting with complex shape is used, then noise shielding is improved, but manufacturing and installation become more difficult
Solution Approach 1:
The metal frame is designed to perform multiple functions including structural support, grounding, and noise shielding. This eliminates the need for complex specially-shaped grounding fittings, as the existing frame structure is utilized for all purposes, simplifying both manufacturing and installation processes.
Solution Approach 2:
The metal frame serves itself by providing grounding and noise shielding functions without requiring additional dedicated components. The frame's inherent structure is leveraged to provide electromagnetic shielding and electrical connection to ground, eliminating the need for separate grounding fittings that would require complex fabrication.
3Object-affected harmful factors
If additional contact parts are added between the display panel unit and frame, then noise grounding is improved, but device complexity increases
Solution Approach 1:
The metal frame is designed to simultaneously provide mechanical support, electrical grounding, and noise shielding functions. By ensuring the frame is electrically connected to ground and positioned to contact the display panel unit, it creates effective noise grounding paths without requiring additional dedicated contact components, thus avoiding increased device complexity.
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 proposed solution achieves a significant noise reduction effect, particularly in the 400 to 500 MHz band, with improvements in horizontal and vertical noise components by 4 to 13 dB and 3 to 10 dB respectively, compared to conventional products.
Implementation Method 1
the noise generated from the display panel unit flows easily through the frame via the contact part
Implementation Method 2
by adding the contact part where this frame and the display panel unit are in contact, the noise generated from the display panel unit flows easily through the frame
Data Source
AI summary
A display device includes a display panel unit having a noise generating source, and a metal frame to which the display panel unit is attached. The display panel unit is fixed to an attachment part which is provided at the frame. The frame includes a contact part that brings the display panel unit into contact with the frame, in addition to the attachment part.