Question

why is the screen of mobile phone is black colour​

Answer 1

Answer:

Usually the power saving mode in phones converts the color screen to black and white. ... Go to your phone's Settings, then go to Power Saving Mode. Under the power saving mode tab, toggle off the power saving mode. This will change the screen color from black and white back to color

Answer 2

Answer:

Explanation:

When the pixel is black, it isn't producing any light. When the pixel is white, it's producing light. In other words, if you use a black background on an AMOLED display, your display will produce less light. This will help save battery power, squeezing more battery life out of your device.