Originally Posted by lengend go to the app, swipe down from the top, go to settings and select dark theme. Posted via CB10 Funny, that's the first thing I thought of but the OP is referring to the Dark themes built into BBM, Calendar, Contacts and Text messaging. Originally Posted by pmccartney Funny, that's the first thing I thought of but the OP is referring to the Dark themes built into BBM, Calendar, Contacts and Text messaging. I didn't say anything rude or bad, all I did was ask if he read any of the numerous threads on it. HOW-TO GEEK BOOKSRead our first book, the HTG Guide to Windows 8, or check our upcoming books. Enter your email below to get exclusive access to our best articles and tips before everybody else. In a world where you can have 3D scenes rendered in real time as your smartphone’s background, plain black wallpapers aren’t the most eye-catching option. On most computer displays, such as the computer screen you’re probably reading this article on, using a black background won’t save you any battery life.
For many portable devices – including Apple’s iPhone – you can’t save any battery life by using a black background. However, this doesn’t apply if you’re using a mobile device with an AMOLED (also known as Super AMOLED or OLED) display.
In other words, if you use a black background on an AMOLED display, your display will produce less light. There are many devices with AMOLED displays out there, including the popular Samsung Galaxy S3. To set a plain black wallpaper on Android, open this page in your browser and tap here to view the plain-black wallpaper image. Tap the Download folder in the gallery, select your plain black wallpaper, and confirm the operation. Remember: Setting a plain black wallpaper will only improve your Android’s battery life if it has an OLED display.
To set a plain black wallpaper on iOS, open this page in Safari and tap here to view the plain-black background image.

Browse for a new wallpaper and select your Camera Roll – you’ll see the black image you saved.
Of course, having a heavy 3D live wallpaper will be much worse for your battery life than a plain black wallpaper. I did this a few years ago for my phone by simply taking a picture in a darkened closet, then set that as background. I just put my phone’s camera lens against my leg, snap a pic, and instant black wallpaper. Disclaimer: Most of the pages on the internet include affiliate links, including some on this site. Thank you to Bill Gracey and his great flickr photostream for the inspiration for this shot.
If you download stock footage, you sometimes want to use certain clips as overlay on another video. Unfortunately, the amount of video file formats and codecs that support an alpha channel is fairly limited. However, they can offer battery life improvements over colored wallpapers on some displays. No matter what color a pixel is – whether it’s dark black or blinding white – there’s a backlight at the back of your screen and it’s constantly outputting light.
Like on a computer’s LCD monitor, the iPhone’s backlight is constantly shining when the screen is on. If you’re using an older version of Android or a manufacturer-provided interface, you may have to tap Wallpaper after long-pressing your home screen. However, we’ve also got some tips that will help maximize any Android device’s battery life. It came with black by default and changing it to white gives you a message that it will reduce the battery life. Since most readable content, web pages and the like, have white backgrounds, a quick color inversion would also conserve power.
Park Ranger, holds a world record for most lightning strikes–over the course of his 35 year career he was struck no less than 7 times.

Now select the top clip and go to the effect controls tab (in default window settings, this is located in the same window as the source monitor).
You’ve probably noticed that you can choose various other blending modes, feel free to experiment with them to achieve other creative looks. The black pixels block more of the backlight, but it’s still behind the black pixel, using power. Each pixel on an OLED screen is an “organic light emitting diode” that produces its own light. To check the type of display your smartphone or tablet has, examine its specifications or perform a Google search. Here on footagious, all the clips we refer to (that are meant to be used as an overlay) have an alpha channel.
Place the effect video with the black background on top of the clip you want the effect to appear on. You’ll see that the darker parts of the images (the black background) are transparent now. This means that those files contain information about which part of the video needs to be transparent. The effect, a light leak effect in this case, is showing on top of the video and is creating a nice sunny effect. If you import a clip with an alpha channel into a video editing application like Premiere Pro, the background will automatically will become transparent.
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