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Apple experimenting with enhanced quantum dot iPhone displays

Sam Loveridge


iPhone 5S
iPhone 5S

Apple is experimenting with enhanced quantum dot iPhone displays according to a new patent.

According to a patent entitled “quantum dot-enhanced display having dichroic filter” filed with the US Patent and Trademark Office (USPTO), Apple is experimenting with next-generation screen technology.

The quatum dot-enhanced displays would be capable of reproducing highly accurate and vivid colours.

Made from various semiconductor materials that exhibit special quantum mechanical qualities, the quantum dots are technically nanocrystals that can be tuned to emit very narrow light spectrums.

Nanocrystals’ wavelength and size are inversely related so the larger the quantum dot, the smaller the emission frequency.

When this is applied to colours, the bigger dots tend to generate longer wavelengths like red, but the smaller dots produce shorter, higher frequencies that create colours like violet.

This means the nanocrystals can be tuned to gradually reproduce the entire colour spectrum by varying in size. Current organic based LEDs emit light in a fixed spectrum so are more restricted.

Quantum dot technology could be used in future iPhone models to improve the Retina displays currently used in Apple latest products.

The technology would boost the colour reproduction while brightness would be boosted used prisms and other lighting techniques to create some of the most beautiful screens.

Apple even outlines the semiconductor materials it could use to fabricate quantum dots in a non-toxic manner for consumers.

This patent was originally filed in 2012, so it’s unsure when and if Apple will ever implement the quantum dot technology in its products.

The iPhone 5S, iPad mini 2, iPad Air and the iPhone 5C all use Apple’s Retina displays at present for a image density of 326ppi.

Read more: iPad Air vs iPad mini 2 with Retina display

Via: Apple Insider


December 20, 2013, 9:21 pm

"Nanocrystals’ wavelength and size are inversely related so the larger the quantum dot, the smaller the emission frequency."

Not a tech I understand, but your description does not help one bit! You state that wavelength and size are inversely related, and then go on to elicit an inverse relationship between size and frequency. Yet frequency is inversely related to wavelength, so we have a contradiction - they can't both be inversely related to a common third parameter.

In the next paragraph you state the opposite, that larger size yields longer wavelengths.

The qualification of frequency as small does not help much either - a frequency can be high or low, but not really "small". Likewise I am not sure a crystal, nano or otherwise, can be described as having a wavelength.
Could you tidy it up and inject some clear meaning please.

Tanya Choudhary

December 21, 2013, 7:04 am

For colour it is :
high frequency = short wavelength
low frequency = high wavelength


December 21, 2013, 8:58 am

frequency and wavelength are inversely related, for light (colour), for radio waves, sound waves, for everything that oscillates whilst travelling at a constant velocity. That is the problem, according to the paragraph in question both are inversely related to a third common factor (size of the quantum dot) - and that can't be true.

Tanya Choudhary

December 21, 2013, 10:01 am

got it!!!
its just bad English, it meant wavelength and size of colour and quantum dot (respectively) are inversely proportional.

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