Display Panel Wave-Absorbing Layer for RF Interference Control

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Solution Overview

Problem

Full-screen mobile phones face electromagnetic wave interference from multiplexing circuits, which affects radio frequency signals due to the close proximity of these circuits to antennas, leading to inconsistent radio frequency metrics and complex operation processes.

Innovation Solution

A display panel design with a multiplexing circuit on one surface and a wave-absorbing material layer on the opposite surface, configured to absorb electromagnetic wave interference signals and convert them into heat, thereby reducing interference with antenna reception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a shielding material layer is provided on the area where the driver IC and the multiplexing circuit are arranged, then electromagnetic wave interference is blocked, but the conductive cloth becomes loosely attached and electromagnetic wave interference signals may propagate inside the display substrate

Engineering Contradiction:

Improveelectromagnetic wave interferenceVSAvoidattachment consistency

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent introduces a wave-absorbing material layer as an intermediary substance between the multiplexing circuit and the antenna. This layer absorbs electromagnetic wave interference signals and converts them into heat, preventing the signals from propagating to the antenna while avoiding the attachment issues caused by conductive cloth shielding materials.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the mechanical shielding approach (conductive cloth) with a wave-absorbing material layer that works through electromagnetic absorption rather than physical blocking. This substitution eliminates the attachment consistency problems associated with conductive cloth while maintaining electromagnetic interference protection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If a shielding material layer is provided on the area where the driver IC and the multiplexing circuit are arranged, then electromagnetic wave interference is blocked, but the operation process becomes complicated

Engineering Contradiction:

Improveelectromagnetic wave interferenceVSAvoidoperation process

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The wave-absorbing material layer serves as a simple intermediary that directly absorbs electromagnetic interference without requiring complex shielding structures or multiple operational steps, thereby simplifying the overall device structure and operation process.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Area of stationary object

If the multiplexing circuit is placed close to the antenna to save space, then full-screen design is achieved, but electromagnetic wave interference significantly affects radio frequency signals

Engineering Contradiction:

Improvescreen occupation areaVSAvoidelectromagnetic wave interference

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The wave-absorbing material layer acts as an intermediary that enables the multiplexing circuit to be placed close to the antenna by absorbing the electromagnetic interference generated, thus allowing full-screen design while protecting radio frequency signals from interference.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful electromagnetic wave interference into heat energy through the wave-absorbing material layer, transforming a detrimental effect into a manageable form that does not interfere with antenna operation, thereby enabling compact layout.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 prevents electromagnetic wave interference from impacting communication signal reception, improving the consistency of radio frequency metrics and simplifying the operation process by dissipating heat through a heat dissipation layer.

Implementation Method 1

a wave-absorbing material layer arranged on a second surface of the display substrate; the wave-absorbing material layer is configured to absorb an electromagnetic wave interference signals

Methodology Applied

Scientific EffectElectromagnetic wave absorption: Absorption (EM radiation)

Implementation Method 2

the wave-absorbing material layer is configured to absorb an electromagnetic wave interference signals

Methodology Applied

Scientific EffectElectromagnetic to thermal energy conversion: Absorption (EM radiation)

Implementation Method 3

dissipating heat through a heat dissipation layer

Methodology Applied

Scientific EffectHeat dissipation: Conduction (thermal)

Data Source

PatentUS11925010B2Display panel, display module and manufacture method thereof, and communication device

Publication Date: 2024.03.05 CHENGDU BOE OPTOELECTRONICS TECH CO LTD

AI summary

A display panel, a display module and a manufacture method thereof, and a communication device are provided. The display panel includes a display substrate and a multiplexing circuit arranged on a first surface of the display substrate. The display panel further includes a wave-absorbing material layer arranged on a second surface of the display substrate. The wave-absorbing material layer is configured to absorb electromagnetic wave interference signals. The second surface is a surface opposite to the first surface.