Dark subjects are becoming increasingly popular. For some devices, they can even save battery power. It all depends on what type of ad your device has – only devices with OLEDs can take advantage of energy savings.
Only devices with OLEDs
You've probably heard of OLEDs, especially if you already have OLEDs on the market for a new TV last year or so. OLED screens are different from LCD and LED displays that are commonly found in electronics because OLEDs do not have a backlight level: each pixel is illuminated individually. This makes the display thinner, but the main reason is that black pixels are not lit at all.
The result is a higher contrast in your favorite movies, dark blacks on any surface, and battery savings when using a dark theme on your laptop or cell phone.
When a Dark Subject Can Save the Battery on Your Laptop
OLED laptops are appearing, some newer models have just been announced at CES 2019. There were No MacOS or ChromeOS laptops with OLED screens, but there are some Windows options. HP's Specter x360 15 comes with a 15-inch Samsung AMOLED display, and Lenovo offers its Yoga C730 with an OLED panel. Surface lovers are out of luck – Microsoft has not yet delivered an OLED screen on their laptops.
Switching to the dark theme of Windows is easy, and all built-in applications are darkened at the same time. With Microsoft Office, you can switch to a dark topic, as well as many third-party apps. Microsoft Edge, Mozilla Firefox, and Google Chrome all have dark themes, but your favorite websites may or may not. The official dark theme of Google is not yet stable under Windows, but will come in the next few months on the market.
You will not get any battery saving benefits if your laptop does not use an OLED display, and you might find the dark theme can affect battery life – at least theoretically. A dark theme might cause you to adjust the brightness of your laptop to read text and see buttons in the UI, and the higher brightness would drain more energy from the battery. It depends on how much light is in your environment, how well your vision works, and how efficient the backlight is. Therefore, you may not notice a difference. Remember, when you switch to the dark side.
If you want to save battery power, there are of course many ways to extend the battery life of your Windows laptop. You can even use the battery saver mode of Windows 10. We've also given you lots of energy-saving tips on your MacBook. The same basic principles also apply to extending the battery life of your Chromebook.
When a Dark Subject Can Save Your Cell Phone's Battery Capacity
OLED displays are much more common on smartphones because they can be made easier in smaller sizes. Samsung Galaxy flagships have always used OLED screens, while iPhones have reserved them for the iPhone X, XS and XS Max – not for the iPhone XR or older iPhones. Google has been using OLED displays for its Pixel phones since 2016, while other manufacturers' support is a hit.
Samsung offers a dark theme for its phone, while pixel phones will get darker mode with Android Q later this year. Rumor has it that Apple's iOS 13 will also have a dark theme, but we will not know for sure until WWDC in late May or early June.
Battery savings through the use of a dark theme with OLED screens are dramatic: Google saw battery life savings of between 15% and 60% when switching from the white background of YouTube to dark mode. I spend a good part of my day on Facebook Messenger to chat with friends and book musical performances. Facebook has just published a dark topic for Messenger. I noticed one or two percent more on my phone at the end of the day, but this small amount could go a long way if I'm never near a charger. Doubletwist (my favorite music player) also has a black theme, so most of my phone is consumed in the dark, and I get the most battery of my phone.
Do not fret if your phone is not ready for an OLED screen. Whether you're using Android or using an iPhone, there are many other ways to save battery life.
RELATED: How the dark mode can extend the battery life of OLED phones 19659006] Some TVs also use OLED panels
You do not have to worry about the battery life of your device TV – and most of the time TV shows, movies or video games are shown anyway. However, if you have an OLED TV, it consumes less power than bright colors.
Theoretically, you might save a few pennies on your utility bills if they spend a lot of time on powering and displaying menus. LG manufactures some of the best OLED televisions, and these televisions also offer a dark theme in their user interfaces.