Integrated Line Filter Shielding for Display PCB Noise Reduction
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Solution Overview
Problem
Display devices face challenges in reducing current noise and electromagnetic interference, which affect their performance and compliance with regulations, while also requiring miniaturization and cost reduction.
Innovation Solution
A line filter is integrated into the display device, featuring a core and coil configuration with a shielding member to shield electric and magnetic fields, reducing noise and vibration, and incorporating a core case that supports the shielding member and integrates components to simplify the structure and reduce manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a line filter is added to reduce current noise, then electromagnetic interference is reduced, but device complexity increases
Solution Approach 1:
The patent combines the line filter structure with the existing housing or mounting bracket of the display device, integrating noise reduction functionality into an existing structural component rather than adding a separate discrete filter assembly
Solution Approach 2:
The housing or mounting structure serves dual purposes: providing mechanical support and housing for the display device while simultaneously functioning as the line filter structure that reduces electromagnetic interference, making one component perform multiple functions
2Object-affected harmful factors
If shielding members are added to shield electric and magnetic fields, then vibration is reduced, but device complexity increases
Solution Approach 1:
The shielding members are integrated into the line filter structure itself, combining electromagnetic shielding functionality with the existing filter components rather than adding separate shielding assemblies
Solution Approach 2:
The line filter structure serves multiple functions: filtering current noise, shielding electric and magnetic fields, and reducing vibration, allowing one structural component to perform multiple protective functions
3Volume of moving object
If component distance is reduced for miniaturization, then device size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The line filter is integrated directly into the housing or mounting structure of the display device, eliminating the need for separate mounting brackets or additional spacing components, thereby reducing overall device size without requiring excessive manufacturing precision
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 shields electromagnetic fields, reduces vibration, miniaturizes the device, and simplifies the line filter structure, thereby enhancing performance and reducing manufacturing costs.
Implementation Method 1
a shielding member, positioned between the core and the board mounting portion, and configured to shield an electric field or a magnetic field
Data Source
AI summary
A display device and an electronic device are provided. The display device comprises: a display panel; a display case which supports the display panel and which includes a board mounting portion; a printed circuit board mounted on the board mounting portion; and a line filter mounted on the printed circuit board so as to reduce current noise, wherein the line filter includes: a core; a shielding member which is arranged between the core and the board mounting portion and which blocks electric fields or magnetic fields; a core case, which accommodates the core, has a coil wound around at least a portion of the outer side thereof, and includes a shielding support portion to support one surface of the board mounting portion of the shielding member.