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[Tech] [Tech-Explained #7] How Dark Mode Can Extend Battery Life on OLED Phones

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17:27, Dec-18-2018 | From PC
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Hello MIUIers,

Welcome to a another edition of "Tech Explained" series. Last time, we have seen How Fitness Trackers Works? In this edition we will know How Dark Mode Can Extend Battery Life on OLED Phones.Without further waiting, let's move on to the topic.

Did you know your phone might last longer if you use apps with darker interfaces? It’s true! Well, sometimes—it’s complicated. It depends on the technology in your screen, and whether or not your phone’s software takes advantage of it.

It’s All About The OLED

It’s obvious that brighter screens use more electricity, and manually lowering the brightness is a good way to get more battery life out of any mobile device. But that’s only part of the equation. For the most part, phone screens use two different kinds of technology for their screen panels: LCD (liquid crystal display) and OLED (organic light-emitting diode).

LCD screens have been around for a long, long time, and have been the primary technology for electronic displays of all kinds ever since the switch from big, boxy CRT monitors and TVs in the late 90s and early 2000s. Today’s LCD screens use a light-emitting diode (a tiny, electrically-powered light) to shine light through a colored grid of pixels, each one containing red, green, and blue cells. This combination of technology is called LED-LCD, or sometimes just “LED screen” for short. That makes the next bit a little confusing.

images.jpg

An organic LED (OLED) uses a building process that combines both the pixel grid and the backlight into a single element: each pixel is emitting its own light. There are a lot of advantages to this, including superior contrast ratios, more vivid color saturation, and better efficiency. But for our purposes, the big draw is that if a pixel on an OLED screen is displaying a completely black color, it’s actually turned off—that portion of the screen isn’t drawing electricity at all. That’s a huge improvement over a more old-fashioned LCD (and LED-LCD), which needs to power the entire screen no matter what image it’s displaying.


Phone manufacturers know this, and they’ve started to take advantage of it. The always-on screen uses a tiny amount of electricity in this mode, less than 1% an hour, thanks to the power advantages of dark interfaces on an OLED panel.

Google, in Android Dev Summit 2018 said tests had revealed that using Maps in Dark Mode can cut the power usage of the Google Pixel 3’s AMOLED display by a staggering 63%. However, doing the same with the iPhone 7 − which features an LCD display − had no effect on power usage.


Why?

LCD screens use a backlight to illuminate their pixels, while OLED’s pixels actually produce their own light. Therefore, while an OLED screen can go completely black, LCD screens can’t.

How Much Battery Life Can Dark Interfaces Save?

Having a nearly all-black screen can save a ton of battery life. But of course, using a conventional app means that a good portion of the screen is displaying text or images, and OLEDs don’t have significant power savings unless the pixel they’re showing is completely black. So how much power can you save?

More than you might think. Google explored this question as it was developing a darker look for Android in general and its own apps in particular. According to a presentation Google made to developers at its conference, the new dark mode in YouTube can save between 15% and 60% of battery life versus the typical white-backed user interface, depending on the overall brightness setting of the screen.


That’s a dramatic improvement—enough that Google now includes a dark mode in Android itself, and is adding it to other apps as well. It’s not out of line to say that, if the apps you most commonly use go dark and so does your general user interface, you might see a boost of thirty minutes to an hour in battery life over a typical day’s usage. Of course, all of that is contingent upon your phone using an OLED screen instead of an LCD.


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Hope you have understood How Dark Mode Can Extend Battery Life on OLED Phones. Any suggestions please do comment below


Thanks to SMOD @VikuBalupura and MODs @dree2016 ,@Manish@786 for continuous support

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Oled is da future!

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thanks oled darkness is good

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