Display Panel Frequency Selective Surface for 5G Antenna Gain

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Solution Overview

Problem

The integration of millimeter wave antennas in display panels is hindered by metal frames and rear covers, which cause significant space transmission loss and reduce coverage area, while existing solutions fail to enhance antenna performance without compromising display functionality.

Innovation Solution

A display panel design incorporating a frequency selective surface near the light exit surface, a dielectric layer, and a microstrip line antenna structure with a mesh configuration, which enhances radiation gain and maintains display functionality by selectively transmitting specific frequency bands and avoiding interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If millimeter wave antenna is integrated in display panel, then antenna coverage is improved, but transmission loss increases due to metal frame and rear cover

Engineering Contradiction:

Improveantenna coverage areaVSAvoidspace transmission loss

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

A dielectric layer with thickness greater than 100 μm is introduced as an intermediary between the antenna structure and the metal frame/rear cover. This dielectric layer acts as a mediator that reduces the harmful interaction between the metal components and the millimeter wave signals, thereby lowering transmission loss while maintaining the antenna's coverage area.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent uses a relatively thin dielectric layer (greater than 100 μm but not excessively thick) to achieve the desired transmission loss reduction. This approach balances performance improvement with minimal impact on overall panel thickness and manufacturing complexity.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Reliability

If frequency selective surface is added to enhance radiation gain, then antenna performance is improved, but device complexity increases

Engineering Contradiction:

Improveantenna radiation gainVSAvoiddisplay panel structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The frequency selective surface is designed to perform multiple functions: it enhances the radiation gain of the antenna structure while simultaneously maintaining display functionality. By integrating this component into the existing display panel architecture, it serves both antenna performance enhancement and display purposes without requiring completely separate systems.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The frequency selective surface is merged with the display panel structure, combining the antenna enhancement function with the existing display components. This integration approach reduces overall device complexity by consolidating functions into a unified structure rather than adding completely separate components.

Inventive Principle:

Principle #5Merging (Combining)

3Loss of energy

If dielectric layer with thickness greater than 100 μm is used, then transmission loss is reduced, but display panel thickness increases

Engineering Contradiction:

Improvemillimeter wave transmission lossVSAvoiddisplay panel thickness

Core Design Contradiction:

Loss of energyVSLength of stationary object

Solution Approach 1:

The patent specifies a dielectric layer thickness parameter of greater than 100 μm, which is carefully chosen to achieve the optimal balance between transmission loss reduction and thickness control. This parameter optimization ensures sufficient performance improvement while minimizing the impact on overall panel thickness.

Inventive Principle:

Principle #35Parameter changes

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 significantly improves millimeter wave antenna radiation capability, particularly in the 5G frequency band, while ensuring the display panel's performance is not adversely affected, achieving a broadband effect and maintaining high transmittance.

Implementation Method 1

the frequency selective surface is configured to transmit an electromagnetic wave with a specific frequency, so as to enhance a radiation gain of the antenna structure

Methodology Applied

Scientific EffectFrequency selective transmission: Filter (electronic)

Implementation Method 2

The display panel includes a dielectric layer between the frequency selective surface and the antenna structure

Methodology Applied

Scientific EffectDielectric isolation: Dielectric

Data Source

PatentUS11927841B2Display panel and display apparatus

Publication Date: 2024.03.12 BOE TECHNOLOGY GROUP CO LTD

AI summary

The disclosure provides a display panel and a display apparatus, and belongs to the field of display technology. The display panel includes a display backplane and an antenna structure; the display panel further includes a frequency selective surface on a side of the antenna structure close to a light exit surface of the display panel; the frequency selective surface is configured to transmit an electromagnetic wave with a specific frequency, so as to enhance a radiation gain of the antenna structure.