Prof Paul Gringras believes that the blue light that keeps people awake should automatically be filtered out.
Prof Gringras, working at London’s Evelina Children’s Hospital, says each new model that’s released is “bluer and brighter”.
He stated that the tablet and phone manufacturers need to show more “responsibility”.
As the nights draw in, our bodies begin to produce melatonin – the sleep hormone – that helps us drift off.
According to the doctor, particular wavelengths of light (at the blue-green end of the spectrum) can disturb the system.
He was part of a study that looked into the light emitted by the devices in Frontiers in Public Health.
The report concluded that there is a definite trend that each new devices wants to be brighter, larger, emit more blue light and have an increased level of contrast.
The professor of children’s sleep medicine said: “That is great for use in the day, but awful for use at night.
“There is converging data to say if you are in front of one of these devices at night-time it could prevent you falling asleep by an extra hour.”
He said there are already a few ‘sleep-aware’ apps available that reduce the blue-green emitted light.
A ‘bedtime mode’ could automatically filter these colours out, like f.lux already does.
He said that more responsibility needs to come from manufacturers, and the key to it all is to automate it.
Prof Gringras added: “It’s not good enough to say do less and accept this is the world we live in, they’re fun devices but we do need some protection on what they do at night-time.”