Twilight: Blue light filter

Twilight: Blue light filter

By Urbandroid (Petr Nálevka)

Twilight: Blue light filterTwilight: Blue light filterTwilight: Blue light filterTwilight: Blue light filterTwilight: Blue light filter

Are you having hassle falling asleep? Are your children hyperactive when enjoying with the pill before mattress time?

Are you using your good telephone or tablet in the late evening? Twilight could additionally be an answer for you!

Recent research means that publicity to blue gentle before sleep may distort your pure (circadian) rhythm and cause incapability to go to sleep.

The trigger is the photoreceptor in your eyes, referred to as Melanopsin. This receptor is sensitive to a slender band of blue mild in the 460-480nm vary which may suppress Melatonin production - a hormone liable for your wholesome sleep-wake cycles.

In experimental scientific studies it has been shown an average individual reading on a pill or good telephone for a few hours earlier than bed time may find their sleep delayed by about an hour. See references under..

The Twilight app makes your device screen adapt to the time of the day. It filters the flux of blue light emitted by your telephone or tablet after sundown and protects your eyes with a gentle and nice purple filter. The filter intensity is easily adjusted to the sun cycle primarily based on your local sunset and sunrise occasions.

Documentation

http://twilight.urbandroid.org/doc/

Get extra from Twilight

1) Bed studying: Twilight is extra nice on the eyes for evening studying. Especially as it is prepared to lower the screen backlight far under the ability of the backligt controls on your screen

2) AMOLED screens: We have examined Twilight on an AMOLED screen for five years with none signal of depletion or over-burning. If properly configured Twilight causes less light emission (by enabling dimming) with extra equal mild distribution (dark areas of the display screen such because the standing bar get tinted). This could actually improve your AMOLED display life time.

Basics on circadian rhythm and the position 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 search out out your current sunset/surise times

- working apps - to cease Twilight in selected apps

- write settings - to set back-light

- network - access smartlight (Philips HUE) to defend you household gentle from blue

Automation (Tasker or other)

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 before 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 shiny mild pulses for delaying circadian part in humans Claude Gronfier, Kenneth P. Wright, Co 2009

Intrinsic period and light intensity determine the part relationship between melatonin and sleep in humans Kenneth P. Wright, Claude Gronfier Co 2009

The Impact of Sleep Timing and Bright Light Exposure on Attentional Impairment during 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 light: Jamie M Zeitzer, Derk-Jan Dijk Co 2000

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