Twilight ­čîů Blue light filter for better sleep

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Are you having trouble falling asleep? Are your kids hyperactive when playing with the tablet before bed time?
Are you using your smart phone or tablet in the late evening? Twilight may be a solution for you!

WARNING: Android O+ does no allow the app to cover your notifications any more..

CAUTION: Android TV installation got more complicated as Google did not implement the overlay permission screen, please see below:
https://twilight.urbandroid.org/how-to-install-twilight-on-android-tv-android-6/

Recent research suggests that exposure to blue light before sleep may distort your natural (circadian) rhythm and cause inability to fall asleep.

The cause is the photoreceptor in your eyes, called Melanopsin. This receptor is sensitive to a narrow band of blue light in the 460-480nm range which may suppress Melatonin production - a hormone responsible for your healthy sleep-wake cycles.

In experimental scientific studies it has been shown an average person reading on a tablet or smart phone for a couple of hours before bed time may find their sleep delayed by about an hour.

The Twilight app makes your device screen adapt to the time of the day. It filters the flux of blue light emitted by your phone or tablet after sunset and protects your eyes with a soft and pleasant red filter. The filter intensity is smoothly adjusted to the sun cycle based on your local sunset and sunrise times.


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

Get more from Twilight
1) Bed reading: Twilight is more pleasant on the eyes for night reading. Especially as it is able to lower the screen backlight far below the ability of the backligt controls on your screen

2) AMOLED screens: We have tested Twilight on an AMOLED screen for 2.5 years without any sign of depletion or over-burning. If properly configured Twilight causes less light emission (by enabling dimming) with more equal light distribution (dark areas of the screen such as the status bar get tinted). This may in fact increase your AMOLED 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 find out your current sunset/surise times
- running apps - to stop Twilight in selected apps
- write settings - to set back-light
- network - access smartlight (Philips HUE) to shield you household light 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 bright light pulses for delaying circadian phase in humans Claude Gronfier, Kenneth P. Wright, & Co 2009

Intrinsic period and light intensity determine the phase 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 short wavelength light. Lockley SW & Co. 2003

Sensitivity of the human circadian pacemaker to nocturnal light: Jamie M Zeitzer, Derk-Jan Dijk & Co 2000

For a desktop try RedShift (Linux) or on Windows there are also blue light flux filtering apps.
M├íte probl├ęmy so zasp├ívan├şm? S├║ va┼íe deti hyperakt├şvne pri hran├ş s tabletom pred span├şm?
Pou┼ż├şvate svoj chytr├Ż telef├│n alebo tablet v neskor├Ż ve─Źer? Twilight m├┤┼że by┼ą pre v├ís rie┼íen├şm!

UPOZORNENIE: Aplik├ícia Android O + neumo┼ż┼łuje aplik├ícii viac pokry┼ą va┼íe upozornenia.

UPOZORNENIE: In┼ítal├ícia telev├şzora Android bola komplikovanej┼íia, preto┼że spolo─Źnos┼ą Google neimplementovala obrazovku s povolen├şm na prekrytie, pozri ni┼ż┼íie:
https://twilight.urbandroid.org/how-to-install-twilight-on-android-tv-android-6/

Ned├ívny v├Żskum nazna─Źuje, ┼że vystavenie modr├ęmu svetlu pred span├şm m├┤┼że skresli┼ą v├í┼í prirodzen├Ż (cirkadi├ínny) rytmus a sp├┤sobi┼ą neschopnos┼ą zaspa┼ą.

Pr├ş─Źinou je fotoreceptor v oku, naz├Żvan├Ż Melanopsin. Tento receptor je citliv├Ż na ├║zky p├ís modr├ęho svetla v rozsahu 460-480 nm, ktor├Ż m├┤┼że potla─Źi┼ą produkciu melaton├şnu - horm├│n zodpovedn├Ż za zdrav├ę cykly sp├ínku a bdenia.

V experiment├ílnych vedeck├Żch ┼ít├║di├ích sa uk├ízalo, ┼że priemern├Ż ─Źlovek, ktor├Ż ─Ź├ştal na tablete alebo chytrom telef├│ne nieko─żko hod├şn pred span├şm, zist├ş, ┼że ich sp├ínok je oneskoren├Ż o hodinu.

Aplik├ícia Twilight umo┼ż┼łuje, aby sa obrazovka zariadenia prisp├┤sobila denn├ęmu ─Źasu. Filtruje tok modr├ęho svetla emitovan├ęho telef├│nom alebo tabletom po z├ípade slnka a chr├íni va┼íe o─Źi jemn├Żm a pr├şjemn├Żm ─Źerven├Żm filtrom. Intenzita filtra je plynule nastaven├í na slne─Źn├Ż cyklus na z├íklade miestneho ─Źasu slnka a v├Żchodu slnka.


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

Z├şskajte viac z Twilight
1) ─î├ştanie z postele: S├║mrak je pr├şjemnej┼í├ş na o─Źiach pre no─Źn├ę ─Ź├ştanie. Najm├Ą preto, ┼że je schopn├Ż zn├ş┼żi┼ą podsvietenie obrazovky ─Ćaleko pod schopnos┼ą backligt ovl├ídac├şch prvkov na obrazovke

2) Obrazovky AMOLED: Testovali sme Twilight na obrazovke AMOLED po dobu 2,5 roka bez ak├Żchko─żvek zn├ímok vy─Źerpania alebo nadmern├ęho horenia. Ak je spr├ívne nakonfigurovan├í, funkcia Twilight sp├┤sob├ş men┼íie vy┼żarovanie svetla (t├Żm, ┼że umo┼żn├ş stmievanie) s rovnomernej┼í├şm rozlo┼żen├şm svetla (tmav├ę oblasti obrazovky, napr├şklad stavov├Ż riadok, bud├║ t├│novan├ę). To m├┤┼że v skuto─Źnosti zv├Ż┼íi┼ą ┼żivotnos┼ą obrazovky AMOLED.

Z├íklady cirkadi├ínneho rytmu a ├║loha melaton├şnu
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

oprávnenie
- umiestnenie - zist├şte aktu├ílny ─Źas z├ípadu slnka / ─Źasu
- spusten├ę aplik├ície - na zastavenie Twilight vo vybran├Żch aplik├íci├ích
- nastavenie zápisu - nastavenie podsvietenia
- Smartlight s pr├şstupom k sieti (Philips HUE) na ochranu v├í┼ího dom├íceho svetla pred modr├Żm svetlom

Automatiz├ícia (Tasker alebo in├ę)
https://sites.google.com/site/twilight4android/automation

S├║visiaci vedeck├Ż v├Żskum

Redukcia amplit├║dy a f├ízov├ę posuny melaton├şnu, kortizolu a in├Żch cirkadi├ínnych rytmov po postupnom zvy┼íovan├ş expoz├şcie v sp├ínku a svetle u ─żud├ş Derk-Jan Dijk, & Co 2012

Vystavenie svetlu v miestnosti pred span├şm potl├í─Źa n├ístup melaton├şnu a skracuje trvanie melaton├şnu u ─żud├ş Joshua J. Gooley, Kyle Chamberlain, Kurt A. Smith & Co, 2011

Vplyv svetla na ─żudsk├║ cirkadi├ínnu fyziol├│giu Jeanne F. Duffy, Charles A. Czeisler 2009

├Ü─Źinnos┼ą jednej sekvencie preru┼íovan├Żch jasn├Żch sveteln├Żch pulzov na oddialenie cirkadi├ínnej f├ízy u ─żud├ş Claude Gronfier, Kenneth P. Wright, & Co 2009

Vn├║torn├ę obdobie a intenzita svetla ur─Źuj├║ f├ízov├Ż vz┼ąah medzi melaton├şnom a sp├ínkom u ─żud├ş Kenneth P. Wright, Claude Gronfier & Co 2009

Vplyv na─Źasovania sp├ínku a jasn├ęho vystavenia svetlu na pozorn├ę po┼íkodenie po─Źas no─Źnej pr├íce Nayantara Santhi & Co 2008

Citlivos┼ą cirkadi├ínnych, pupil├írnych a vizu├ílnych vedomost├ş u ─żud├ş s nedostato─Źnou vonkaj┼íou sietnicou Farhan H. Zaidi & Co, 2007 \ t

Vysok├í citlivos┼ą ─żudsk├ęho cirkadi├ínneho rytmu melaton├şnu na resetovanie svetlom s kr├ítkou vlnovou d─║┼żkou. Lockley SW & Co. 2003

Citlivos┼ą ─żudsk├ęho cirkadi├ínneho kardiostimul├ítora na no─Źn├ę svetlo: Jamie M Zeitzer, Derk-Jan Dijk & Co 2000

Pre desktop vysk├║┼íajte RedShift (Linux) alebo na Windows s├║ aj aplik├ície na filtrovanie modr├ęho svetla.
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Novinky

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