One of the biggest power drains for modern devices is the screen – providing bright and colourful displays uses a lot of power, even compared to elements such as the processor. But a new breakthrough in OLED screens could cut the energy consumption of the screens in the best phones and the best smartwatches to just a third of what it is now, which would give these devices hours and hours more use per charge.
A new paper spotted by OLED-info.com explains that a team created an OLED display that can provide 100 nits of brightness while drawing 1.33 volts, noting that existing OLED screens can require up to 4.5 volts for the same brightness.
(A nit is a unit of brightness, often used for screens, and is equivalent to the cd/m2 unit you might see instead in some spec sheets.)
In fact, the screen was said to hit 177 nits of brightness running off a 1.5V battery, which suggests serious efficiency. The information about the improvements is, shall we say, quite technical, but the savings seem to come from severely reducing "parasitic loss" deactivation of "excited states". Which can only be a good thing.
There could even be knock-on advantages here that fix a long-standing issues with OLED: lower power consumption will likely mean lower operating temperatures, which may reduce burn-in – heat is a common factor for OLED burn-in.
Naturally, we're not going to see changes in phones overnight. For a start, we don't know whether this improvements at 100 nits of brightness will translate well up to the 1000 nits that the Apple Watch Series 7's screen puts out, or the 600 nits or so that most phone screens operate at. It looks like it probably will, based on that figure of hitting 177 nits with only a small increase in voltage, but that's not a certainty.
And even if it does turn out to be the Next Big Thing in mobile OLED screens, it'll take years to build this technology into the manufacturing process and get it into your devices.
But in an age where big leaps in battery life are becoming harder and harder to come by, it's really promising to know that there are still developments coming that could give your smartwatch or phone the extra days or hours that might be a life-saver one day.