The blue subpixel has the shortest wavelength, and so the "night mode" on your phone greatly reduces the brightness of that blue subpixel, or even turns it off entirely, making the screen appear much more yellow.īut according to UoM's new study, the marginal benefit provided by making the average wavelength of the light emitted by your phone's display longer (i.e., warmer) is probably outweighed by another factor related to the ways your eyes affect your biological clock. On your phone's screen, you typically have three "subpixels" lighting each pixel of the display, in the colors red, green, and blue.
The wavelength of light corresponds to how we perceive its color. In your eye, a protein called melanopsin responds to the intensity of light, and specifically, it responds more strongly to light of a shorter wavelength. The reasoning behind using a yellow tint on your screen was, at least, based on scientifically plausible principles. In fact, according to a study out of the University of Manchester, that yellow-shifted "night light" is even worse for helping you get to sleep than just leaving your phone in the standard untinted mode. In what should come as a surprise to no one, it turns out just making your smartphone's screen kind of yellow may not stop it from keeping you awake.
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YELLOW NIGHT SCREEN SAMSUNG GALAXY S7 ANDROID
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