Display Panel Fanout Layout for Multiplexer EMI Shielding
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Solution Overview
Problem
The proximity of a multiplexer to an antenna in AMOLED display apparatuses causes electromagnetic interference, leading to poor communication performance due to electromagnetic radiation signals emitted by the multiplexer interfering with the antenna.
Innovation Solution
A display panel design that includes a direct current supply line positioned between a multiplexer and a bendable portion, crossing over signal lines to absorb electromagnetic radiation signals and prevent them from reaching the antenna, thereby reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the multiplexer is placed close to the antenna in the display panel, then the device complexity is reduced and ease of manufacture is improved, but electromagnetic interference occurs causing poor communication performance
Solution Approach 1:
A ground line is introduced as an intermediary element between the multiplexer and the antenna. The ground line acts as a shield that blocks electromagnetic radiation signals from the multiplexer from reaching the antenna, thereby reducing electromagnetic interference while allowing the multiplexer to remain in its convenient location for manufacturing
Solution Approach 2:
The ground line, which is already present in the display panel structure, is utilized to convert the harmful electromagnetic radiation from the multiplexer into a beneficial shielding effect. By positioning the ground line strategically, it absorbs and redirects electromagnetic signals away from the antenna, transforming a potential harm into a protective mechanism
2Object-affected harmful factors
If the multiplexer is positioned away from the antenna to reduce electromagnetic interference, then communication performance is improved, but the device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The ground line serves as a mediator that allows the multiplexer to be positioned away from the antenna without increasing overall device complexity. Instead of redesigning the entire layout, the ground line provides a simple shielding mechanism that resolves the interference issue with minimal additional complexity
3Object-affected harmful factors
If signal lines are routed directly without crossing, then manufacturing precision is improved, but electromagnetic radiation signals can reach the antenna causing interference
Solution Approach 1:
The solution moves from a two-dimensional routing problem to a three-dimensional solution by utilizing the ground line as a vertical shielding element. The ground line extends in the vertical dimension (thickness direction of the panel) to block electromagnetic signals, allowing signal lines to cross without compromising manufacturing precision or increasing interference
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 design effectively prevents electromagnetic interference by absorbing radiation signals, maintaining the communication ability of the antenna by spacing the multiplexer and antenna apart, thus enhancing communication performance.
Implementation Method 1
A display panel design that includes a direct current supply line positioned between a multiplexer and a bendable portion, crossing over signal lines to absorb electromagnetic radiation signals and prevent them from reaching the antenna
Data Source
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AI summary
A display panel is provided. The display panel includes a display part; and a fanout part. The display part includes a plurality of pixel driving circuits. The fanout part includes a bendable portion and a multiplexer. The display panel includes a plurality of first signal lines extending through the bendable portion, and connecting the plurality of pixel driving circuits to the multiplexer. A direct current supply line extending through the bendable portion and electrically connected to the plurality of pixel driving circuits. A portion of the direct current supply line is between the multiplexer and the bendable portion and crosses over the plurality of first signal lines.