Phosphorescent Electronics Case Study

A leading manufacturer of oxygen concentrators and delivery equipment needed engineering and production assistance for a membrane switch used in a medical device product. The switch needed to be visible in low light environments. JN White® engineered a custom part with glow-in-the-dark graphics created using phosphorescent technology while also incorporating other common features medical equipment manufactures need for long-term durability, chemical resistance and liquid ingress.


The customer approached JN White® for help engineering and producing a membrane switch for a portable oxygen unit. The product was utilized in low light environments and the customer needed a solution with graphics that would be easy to see in these situations. In addition, the switch needed to be sealed to meet stringent medical device guidelines.

How JN White® Helped

After initially manufacturing prototypes with white graphics, the customer wanted more visibility in low light environments. The engineering team at JN White® quickly engineered a solution to the visibility challenge by proposing glow-in-the-dark graphics. This graphics treatment was achieved using phosphorescent technology. In addition the team engineered the switch with a “solid” polycarbonate gasket that met the “ingress” requirements without going the route of expensive 3M VHB tape.


The team at JN White® managed the engineering of this component from inception through production. The final switch is sealed to meet the product requirements and utilizes phosphorescent technology for glow-in-the-dark graphics. The switch can easily be seen in even low light environments.

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"Very pleased with your team's response to our need during the COVID-19 crisis."
Lisa L., Medical Device
"JN White has been exceptional in working with our company in order to develop the look and feel of our new MRI patient worn transmitter. We had originally worked with a prior manufacturer for an earlier version of this product with much less desirable results. JN White delivered a clean professional product at a very reasonable price on time!"
Gary P., Medical
"We had very little information to work with and Jessica James made it nearly effortless on our end to get us exactly what we needed in a timely manner."
Lexi W., Industrial Equipment
"Getting any after-market graphic overlays done always has a certain risk factor in getting it all right. You guys were helpful, patient, & knowledgeable to achieve the best end result. Even pointing out some things that might be [an] oversight or [areas for] improvements. The outcome was perfect."
John S., Technology
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Matt C., Military
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Vern L., Industrial
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Sara H., Medical
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Roger W., Education
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Marie P., Government
"I found working with Sara to be a pleasant experience. We were trying to dial in the color to get just the right look on the printed substrate...Sara sent us a sample print sheet that had several variations, up and down, from the colors we specified, which allowed me to pick exactly the color we wanted. The end result product is perfect!"
Don M., Safety
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Jim R., Government
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Ramses Z., Medical Devices
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