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Polarised sunglasses-friendly TFT solutions from Relec

18 March 2020

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The advantages of wearing polarised sunglasses is well documented, but there can sometimes be issues reading TFT displays with polarised lenses. TFT displays output light which is inherently polarised in one plane. If this plane is 90 degrees out of sync with the wearer’s lenses, it can make displays all but unreadable, leaving the screen virtually black to the observer. This can be especially important when standard landscape displays are used in portrait mode.

Relec Electronics has been working closely with its partners at Digiwise to develop a solution for high brightness TFT displays which overcomes this problem through the introduction of a ¼ Wave retarder film.

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A wave retarder is a material or film that has different refraction indices for linearly polarized light travelling in one or other of two perpendicular axes (fast and slow). By optimising these characteristics, we can control the polarisation components of the light wave, thus reducing any conflicts with polarised sunglasses.

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Why use a Relec solution?

Relec’s TFT modules are available with exceptionally high brightness levels of up to 1500cd/m2, making them suitable for both indoor and outdoor applications. When fitted with a ¼ wave retarder film the display can be used in either portrait or landscape mode with polarised sunglasses.

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Relec are also able to offer display solutions with a wide range of options including either PCAP or resistive touch screen, optical bonding, water rejection, glove touch and anti-bacterial films. Our team of engineers are on hand today to help you develop the best solution for your application.


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