Phones need ‘bed mode’ to protect sleep

Smartphones, tablets and e-readers should have an automatic “bedtime mode” that stops them disrupting people’s sleep, says a doctor.
Prof Paul Gringras argued the setting should filter out the blue light that delays the body clock and keeps people awake later into the evening.
The doctor, from Evelina Children’s Hospital in London, said every new model was “bluer and brighter”.
He said manufacturers needed to show more “responsibility”.
As it gets darker in the evening, the body starts to produce the sleep hormone melatonin – which helps people nod off.