Coated Chassis for LCD Antenna Noise Reduction
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Solution Overview
Problem
Conventional LCDs in mobile devices face challenges in reducing antenna noise without adding bulk due to the need for a metal ring around the TFT glass, which increases the device's size.
Innovation Solution
A coated chassis made from a non-conductive material with a conductive layer applied to form a continuous strip or closed-loop around the chassis frame, coupled to the system ground to reduce antenna noise without increasing the device's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a thick metal ring is used around the TFT glass to reduce antenna noise, then the noise isolation performance is improved, but the device size increases
Solution Approach 1:
The patent applies a thin conductive film (such as ITO) coated directly onto the TFT glass surface, replacing the traditional thick metal ring structure. This thin film approach maintains the necessary electrical conductivity for noise isolation while occupying minimal space, thereby preventing antenna noise without increasing device dimensions.
Solution Approach 2:
The invention changes the physical parameters of the conductive structure by transitioning from a thick metal ring to a thin conductive coating with optimized thickness and conductivity parameters. By adjusting the film thickness and material properties, the patent achieves effective noise isolation while maintaining a compact form factor that does not increase device size.
2Object-affected harmful factors
If a metal ring is added around the TFT glass to isolate the LCD from the antenna, then the noise reduction is improved, but the device complexity increases
Solution Approach 1:
The patent merges the noise isolation function directly into the TFT glass by coating the conductive material onto the glass surface. This integration eliminates the need for a separate metal ring component and its associated mounting structure, thereby reducing device complexity while maintaining effective noise isolation between the LCD and antenna.
Solution Approach 2:
The conductive coating on the TFT glass serves multiple functions: it provides the necessary electrical connectivity for the display operation and simultaneously acts as a shield for noise isolation. This multi-functionality reduces the need for additional components, simplifying the overall device structure.
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 reduces antenna noise while maintaining a compact device size by using a thin conductive layer that adds little to no bulk, providing efficient noise isolation without compromising the device's dimensions.
Implementation Method 1
The conductive material can be applied to the chassis to form a continuous strip on the chassis frame. The conductive material can further form a closed-loop around the chassis frame... This can advantageously prevent or reduce noise in the device's antenna caused by the LCD
Data Source
AI summary
A coated chassis is disclosed. The chassis can be made from a non-conductive material and can be operable to support a display. A conductive material can be applied to at least a portion of the chassis to form a continuous strip on the chassis frame. The conductive material can further form a closed-loop around the chassis frame. The chassis frame can be included within a device, such as a mobile phone, touchpad, portable computer, portable media player, and the like. The conductive material on the chassis can be coupled to the system ground of the device. Processes for making a coated chassis are also disclosed.