Nested Shielding for TV Tuner Noise Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Broadcast receiving apparatuses, such as TVs and set-top boxes, experience poor reception sensitivity and potential loss of signal due to interference from overlapping frequency bands used by wireless communication devices, leading to degraded image and sound quality.
Innovation Solution
A television tuner module with a first shield member surrounding the tuner and a second shield member that contacts and grounds the first shield member, effectively blocking external noise and interference by forming a continuous ground path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single shield member is used to surround the tuner, then the structure is simple and easy to manufacture, but the shielding effectiveness against external noise is insufficient when frequency bands overlap
Solution Approach 1:
The patent employs a nested shielding structure where a first shield member surrounds the tuner, and a second shield member surrounds the first shield member. This nested configuration creates multiple layers of electromagnetic shielding, significantly enhancing the ability to block external noise and interfering signals from overlapping frequency bands while maintaining manufacturing feasibility through modular assembly.
Solution Approach 2:
The patent transitions from a single-layer shielding approach to a multi-layer dimensional structure. The first and second shield members create a three-dimensional nested shielding environment around the tuner, adding spatial dimensions to the shielding effect. This dimensional enhancement provides superior electromagnetic isolation against external noise compared to a single planar shield.
2Adaptability or versatility
If frequency bands are increased to accommodate more transmitters and receivers, then the system capacity is improved, but mutual interference between frequency bands occurs
Solution Approach 1:
The nested shield members are positioned to preemptively block interfering electromagnetic waves before they can reach the tuner. The first shield member provides initial filtering, while the second shield member provides additional protection, creating a preliminary defense system that prevents mutual interference between overlapping frequency bands before the interference can affect signal reception.
3Object-affected harmful factors
If the second shield member is completely enclosed to maximize shielding, then the noise blocking is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The shielding structure is segmented into distinct first and second shield members, each serving specific shielding functions. This segmentation allows for modular manufacturing and assembly, reducing overall complexity while maintaining effective noise blocking. The first shield member can be manufactured and tested separately, then integrated with the second shield member to form the complete nested shielding system.
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 doubly shielded tuner module enhances reception sensitivity by effectively blocking external noise, ensuring reliable broadcast signal reception even when frequency bands overlap, thereby improving the quality of displayed images and sounds.
Implementation Method 1
a first shield member that surrounds the tuner; and a second shield member that surrounds the first shield member
Data Source
AI summary
A television tuner module includes a tuner that is configured to receive a television broadcast signal; a first shield member that surrounds the tuner and a second shield member that surrounds the first shield member.