15 patents in this list
Updated: May 24, 2024
The usage of mobile phones is growing, and with it comes worries about radiation emissions and possible health impacts. One preventative measure to guarantee user safety is to reduce exposure.
It is possible to use a mobile phone in a safer and healthier manner by using cases designed to reduce radiation emissions. This page examines phone cases made to protect users from radiation from their devices.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.