15 patents in this list

Updated:

As mobile devices become indispensable, concerns about radiation exposure have grown among users and professionals alike. The challenge is to effectively shield users from electromagnetic emissions without sacrificing device functionality or aesthetics. This issue is critical as it impacts user health, device performance, and regulatory compliance across industries.

Designing protective solutions involves balancing radiation attenuation with maintaining signal quality and device usability. Engineers and researchers face difficulties in creating materials and structures that can absorb or redirect radiation without adding bulk or complexity. The task is further complicated by the need to integrate these solutions into sleek, modern device designs.

This page explores various engineering approaches that address these challenges, offering insights into how protective cases can minimize radiation exposure. The solutions include cases with radiation-redirecting layers, sound-amplifying features, and materials that absorb electromagnetic waves. These innovations aim to enhance user safety while preserving the functionality and aesthetic appeal of mobile devices.

1. Electronic Device Case Assembly with Sealed Pocket Containing Electromagnetic Radiation Attenuating Layer

Pranav Bollapragada, 2022

Electronic device case assembly that provides protection against electromagnetic field radiation and microbes. The assembly includes a case configured to receive an electronic device and has a sealed pocket. The case assembly includes an electromagnetic field radiation attenuating layer embedded within the sealed pocket of the case. The attenuating layer is made of material selected from the group consisting of aluminum, silver, copper, and zinc.

US20220110231A1-patent-drawing

2. Protective Cell Phone Case with Concave Copper Shield and Integrated Sound Amplification Features

William James Scott, 2022

A protective cell phone case is designed to redirect radiation away from the user while amplifying sound and shielding radio signals for privacy. The case has a hinged front plate with slots and a lip to fit over the phone, a copper shield with sound openings, and a back plate with a camera slot. The copper shield is concave to redirect radiation away from the user. The case also has octagonal notches and dense wood material for enhanced sound amplification.

3. Cell Phone Case with Hinged Front Plate and Integrated Concave Copper Shield for Radiation Redirection and Audio Amplification

William James Scott, 2021

A cell phone case design that redirects radiation away from the user while amplifying audio to reduce radiation exposure and improve sound quality. The case has a hinged front plate with slots for the camera and buttons and a back plate with a lip to hold the phone. A concave copper shield between the plates redirects radiation away from the body. The front plate has audio amplification slots matching copper shield openings.

4. Mobile Device Case with High Molecular Material Frame and Electroless Plated Metal Coating for Electromagnetic Shielding

IMTECHNOLOGY.CO.,LTD, 2021

Mobile device case with improved electromagnetic shielding and manufacturing efficiency. The case has a frame made of a high molecular material like PEEK that is coated with a thin layer of metal to shield electromagnetic radiation. The metal coating is formed by electroless plating on the case surface. The coating process involves cleaning the case, introducing polar functional groups via cold plasma treatment, and plating with metal ions using a reducing agent. This allows shielding without requiring vacuum deposition or spray-on paints. The metal coating improves shielding, while the high molecular material provides strength and low weight. Unlike metal frames, the case frame is injection molded, enabling complex shapes and better shielding coverage.

5. Cellphone Case with Hinged Wooden Plates, Slotted Front for Audio Amplification, and Internal Copper Shield for Signal Redirection

William James Scott, 2020

This cellphone case redirects radiation away from the user, amplifies speaker audio, and shields radio signals. The case has a hinged front and back plate made of dense wood that insulates heat. The front plate has a slotted design to redirect radiation away from the body while matching audio openings to amplify sound. The back plate has a lip to hold the phone, allowing access to buttons and ports. A concave copper shield inside redirects signals away from the body.

6. Mobile Phone Case with Inner and Outer Radiation Absorbers and Screen Isolation Mechanism

Qichun SHE, 2020

An anti-radiation mobile phone case that reduces radiation exposure without affecting signal strength. The case has an inner absorber attached to the flange around the phone compartment. This absorber covers the inner side wall and prevents radiation from leaking into the compartment. It also has an extending portion near the screen that contacts it to awaken it. This isolates the screen from radiation. The case can have an outer absorber on the cover facing the screen to reduce radiation further.

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7. Radiation Shield with Conductive Layers and Aperture for Touchscreen Access

Stephen Carmody, 2018

Radiation shield for cell phones that reduces exposure to electromagnetic radiation while still allowing use of the device. The shield attaches to the phone and covers the front face except for an aperture over the touchscreen. It has conductive layers with openings for access to the controls. The shield blocks radiation from the phone's antenna while allowing touch input and visual display.

8. Electronic Device Case with Integrated Metal Radiation-Blocking Layer

Shahriar Davaran, 2016

Protective case for electronic devices like tablets and laptops that include a layer to inhibit radiation transmission towards the user. The case has a metal radiation-blocking layer integrated into the bottom. This prevents radiation emitted by the device from transmitting in the direction of the user when the device is placed on a surface or held in the case. The metal layer can be permanently fixed in the case or removable for transfer to other cases.

9. Protective Cover for Portable Devices with Integrated Metal Layer and Ag Nanoweb for Electromagnetic Shielding and Antibacterial Function

AMOGREENTECH CO., LTD., 2015

Protective cover for portable devices with integrated electromagnetic wave shielding, antibacterial properties, and improved antenna performance. The cover has a metal layer on the inner surface to shield EM waves, an Ag nanoweb layer formed by electrospinning Ag nanomaterials onto the metal, and a fiber layer protecting the metal. The Ag nanoweb provides antibacterial and EM shielding. The metal layer is made by attaching a conductive plate to the cover and then electrospinning Ag nanomaterials onto it. The metal yarn used for the conductive layer is wound onto the fiber yarn in a specific direction to prevent breaks in the antenna pattern.

10. Cell Phone Case with Transparent Faraday Cage Materials Incorporating Metal Nanoparticle Doping

Michael Sekora, Jeffrey Mroz, 2010

A cell phone case that reduces radiation exposure by using transparent materials with Faraday cage properties. The case blocks radiation from reaching the user by covering the front and sides with Faraday materials. The back is left open for signals to enter/exit. This allows the case to reduce radiation contact compared to a solid case significantly. The transparent Faraday materials are made by doping metal nanoparticles into the case material. This enables high radiation blocking while maintaining transparency. The case can be made entirely of the heterogeneous transparent Faraday material for maximum blocking.

11. Electronic Device Casing with Integrated Electromagnetic Wave Absorption Structure

Fu-Chi Tsai, Po-Yi Lin, 2006

Casing for electronic devices that fully absorbs electromagnetic waves. The casing has a body and an electromagnetic absorption structure attached to the body surface. The absorption structure is made of a material that absorbs electromagnetic waves instead of just reflecting them. This provides better shielding compared to just reflecting the waves. The absorption structure can be applied separately to existing devices or integrated during manufacturing by molding it together with the body.

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12. Conductive Shielding for Non-Ionizing Radiation Mitigation in Telecommunication Devices

Ben Saur, Diana M. Maichin, 2004

Reducing exposure to non-ionizing radiation emitted by cell phones and cordless phones without degrading signal quality. The invention involves placing conductive shielding inside the phones to capture the radiation before it reaches the user's head. The shielding can be flexible sheets or strips secured inside the phone using adhesive. This captures the radiation before it can enter the user's body. The shielding can be made of a thin metal mesh.

13. Electrically Conductive Fiber Mesh for EMI Shielding in Portable Electronic Devices

Nokia Mobile Phones Ltd., 2004

EMI shielding for portable electronic devices like cell phones that reduces weight and cost compared to metal enclosures while maintaining shielding effectiveness. The shielding uses electrically conductive fiber mesh inserted into device walls or laminated to internal surfaces. This surrounds and shields electronic components. The mesh contacts ground planes and carries signals between circuits. The mesh can be made of conductive fibers like copper or coated synthetic fibers like silver. It provides flexible, lightweight, and cost-effective EMI shielding without gaps or seals.

14. EMI Shielding Enclosure with Colored Conductive Coating on Transparent Interior Surfaces

Thomas A. Clement, Ming Zhou, 2003

Electromagnetic interference (EMI) shielding enclosures, like phone cases, with interior surfaces coated in colored conductive paint to provide both EMI shielding and cosmetic enhancement. The coating is applied to transparent or translucent plastic parts to create an optically visible colored layer that can be seen through the exterior. The colored paint masks the natural brown or silver color of the conductive filler and provides a customized appearance. The conductive coating provides EMI shielding while the color adds a visual element to the enclosure.

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15. Radiation Shield with Conversion Material for Ionic Motion Dissipation

Ashok V. Joshi, 2002

Radiation shield for devices like cell phones that converts radiation into ionic motion to dissipate it instead of allowing it to reach the user. The shield has a barrier with conversion material between the device's radiation source and the user's body. This barrier converts the radiation into ionic motion that dissipates it, preventing it from reaching the user. The barrier can be adjusted relative to the device's antenna to optimize radiation capture.

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Wireless charging, signal strength, and utility must not be compromised by the ability to filter or divert radiation in these enclosures in an effective manner. Innovation in material selection and engineering is needed to accomplish maximum radiation reduction with a modern and user-friendly design. Diverse ways of accomplishing this objective are presented in the patents reviewed.