Twilight ???? Blue light filter for better sleep
By Urbandroid (Petr Nálevka)
Are you having bother falling asleep? Are your children hyperactive when taking part in with the tablet before mattress time?
Are you utilizing your smart phone or pill in the late night? Twilight could be a answer for you!
Recent analysis suggests that publicity to blue mild earlier than sleep could distort your natural (circadian) rhythm and trigger incapability to fall asleep.
The trigger is the photoreceptor in your eyes, called Melanopsin. This receptor is sensitive to a slender band of blue mild in the 460-480nm vary which might suppress Melatonin production - a hormone accountable for your healthy sleep-wake cycles.
In experimental scientific studies it has been proven an average individual reading on a tablet or good telephone for a couple of hours earlier than bed time might find their sleep delayed by about an hour. See references under..
The Twilight app makes your system display screen adapt to the time of the day. It filters the flux of blue gentle emitted by your telephone or pill after sundown and protects your eyes with a gentle and pleasant red filter. The filter depth is smoothly adjusted to the sun cycle based mostly on your local sundown and dawn times.
Documentation
http://twilight.urbandroid.org/doc/
Get more from Twilight
1) Bed studying: Twilight is extra nice on the eyes for evening reading. Especially as it is able to decrease the display backlight far below the ability of the backligt controls on your display
2) AMOLED screens: We have tested Twilight on an AMOLED display screen for 5 years without any signal of depletion or over-burning. If correctly configured Twilight causes much less gentle emission (by enabling dimming) with extra equal light distribution (darkish areas of the display screen such as the status bar get tinted). This could in truth enhance your AMOLED display screen life time.
Basics on circadian rhythm and the role of melatonin
http://en.wikipedia.org/wiki/Melatonin
http://en.wikipedia.org/wiki/Melanopsin
http://en.wikipedia.org/wiki/Circadian_rhythms
http://en.wikipedia.org/wiki/Circadian_rhythm_disorder
Permissions
- location - to discover out your present sundown/surise instances
- working apps - to cease Twilight in chosen apps
- write settings - to set back-light
- community - entry smartlight (Philips HUE) to defend you family light from blue
Automation (Tasker or different)
https://sites.google.com/site/twilight4android/automation
Related scientific research
Amplitude Reduction and Phase Shifts of Melatonin, Cortisol and Other Circadian Rhythms after a Gradual Advance of Sleep and Light Exposure in Humans Derk-Jan Dijk, Co 2012
Exposure to Room Light earlier than Bedtime Suppresses Melatonin Onset and Shortens Melatonin Duration in Humans Joshua J. Gooley, Kyle Chamberlain, Kurt A. Smith Co, 2011
Effect of Light on Human Circadian Physiology Jeanne F. Duffy, Charles A. Czeisler 2009
Efficacy of a single sequence of intermittent brilliant light pulses for delaying circadian section in people Claude Gronfier, Kenneth P. Wright, Co 2009
Intrinsic interval and mild depth determine the section relationship between melatonin and sleep in people Kenneth P. Wright, Claude Gronfier Co 2009
The Impact of Sleep Timing and Bright Light Exposure on Attentional Impairment throughout Night Work Nayantara Santhi Co 2008
Short-Wavelength Light Sensitivity of Circadian, Pupillary, and Visual Awareness in Humans Lacking an Outer Retina Farhan H. Zaidi Co, 2007
High sensitivity of the human circadian melatonin rhythm to resetting by quick wavelength gentle. Lockley SW Co. 2003
Sensitivity of the human circadian pacemaker to nocturnal gentle: Jamie M Zeitzer, Derk-Jan Dijk Co 2000
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