Have this on my computer screen, but i do not know how to fix it/ and how it got there. any ideas?

You can not do anything after the signs of burning the screen of the mobile, although there are many applications in the store Google Play, which claims that they can fix the problem and restore colors but in the end can not do so and most you can do is burn the rest of the pixels the same proportion So as not to notice the difference between them and the affected pancakes mainly.

But if you are interested you can take some steps that will help you avoid the problem basically and not fall into it.

   Use a relatively low screen brightness as high brightness needs a high current to generate any faster consumption of LEDs on the screen.

   Reduce the time of the screen saver, shortening the duration will reduce the time used to display still images repeatedly on the screen.

   Use the Immersive Mode in your application, which displays the applications on the entire screen and permanently deletes the navigation bar.

   Use a dark background and change it periodically.

   Use a keyboard that provides a dark display style to prevent degradation of pixel performance in the lower area faster.

   If you are using navigation applications continuously and for a long time on a trip, use an application that does not have very stable elements within its interface.

the omega button is one of them.