Transparent Conductive Overlay for RF Energy Redirection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Radio frequency radiation from wireless devices poses health risks to users due to the proximity of radiation, leading to concerns about burns, sickness, and potential cancer, with existing technologies failing to adequately mitigate these risks while maintaining device functionality and power.

Innovation Solution

A protective screen overlay with optically transparent conductive elements that parasitically couple with the device's antenna to redirect radio frequency energy away from the user, reducing the specific absorption rate (SAR) and redistributing localized RF hotspots, utilizing materials like indium tin oxide, graphene, or carbon nanotubes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the antenna is positioned close to the user for compact device design, then device portability is improved, but radio frequency radiation exposure to the user increases

Engineering Contradiction:

Improvedevice compactnessVSAvoidradio frequency radiation exposure

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

A protective screen overlay with optically transparent conductive elements is introduced as an intermediary component between the antenna and the user. The conductive elements parasitically couple with the antenna to intercept and redirect radio frequency energy away from the user, reducing SAR exposure by 20-90% while maintaining device compactness and visual transparency.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful radio frequency radiation into a beneficial effect by using the conductive elements to redirect energy away from the user. The parasitic coupling mechanism transforms the harmful near-field radiation into a controlled electromagnetic interaction that reduces exposure while maintaining communication functionality.

Inventive Principle:

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

2Object-affected harmful factors

If conductive elements are added to the protective screen overlay, then radio frequency radiation is reduced, but optical transparency may be compromised

Engineering Contradiction:

Improveradio frequency radiationVSAvoidoptical transparency

Core Design Contradiction:

Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The conductive elements are strategically positioned in specific locations on the protective screen overlay, such as near the edges or bezel areas, rather than uniformly across the entire surface. This localized placement provides effective RF radiation mitigation while minimizing impact on overall optical transparency and visual appearance.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The protective screen overlay combines transparent conducting oxide (TCO) materials or other transparent conductive substances with the base protective screen material. This composite structure provides both the necessary electrical conductivity for RF mitigation and maintains optical transparency for clear display visibility.

Inventive Principle:

Principle #40Composite materials

3Reliability

If multiple conductive elements are positioned at different frequencies, then coupling efficiency is improved, but device complexity increases

Engineering Contradiction:

Improvecoupling efficiencyVSAvoidnumber of conductive elements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The conductive elements on the protective screen overlay are designed to provide multi-frequency coupling capability through universal design principles. Rather than requiring separate elements for each frequency band, the same conductive structure can effectively couple with the antenna across multiple frequency ranges, reducing overall device complexity while maintaining broad operational reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 user exposure to radio frequency radiation by at least 20% to 90% without compromising the device's radiation power, improving signal strength and safety by redirecting energy away from the user.

Implementation Method 1

A conductive element is positioned in the protective screen overlay and configured to parasitically couple with an antenna of the wireless device when the antenna is energized

Methodology Applied

Scientific EffectParasitic coupling: Parasitic Capacitance

Implementation Method 2

The conductive element may be configured to redistribute or disperse a localized RF 'hotspot' or regions of an intense radio frequency field

Methodology Applied

Scientific EffectElectromagnetic field redistribution: Electromagnetic Induction

Implementation Method 3

The antenna may be comprised of indium tin oxide, another transparent conducting oxide (TCO), a transparent conducting film, graphene, carbon nanotubes, or other two-dimensional conductive materials

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS11088440B2Protective screen overlay with antenna element

Publication Date: 2021.08.10 PENUMBRA BRANDS INC

AI summary

An apparatus may include a protective screen overlay configured to couple with a screen of a wireless device. The protective screen overlay may be optically transparent. A conductive element is positioned in the protective screen overlay and configured to parasitically couple with an antenna of the wireless device when the antenna is energized. The conductive element may be optically transparent.