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{{Short description|Light on a smartphone to indicate new notifications}}
[[File:Notification LED Huawei.webm|
A '''Notification LED''' is a small [[RGB color model|RGB]] or [[monochrome]] [[LED]] light usually present on the front-facing screen [[Screen bezel|bezel]] (display side) of [[smartphone]]s and [[feature phone]]s whose purpose is to blink or pulse to notify the phone user of missed calls, incoming [[SMS]] messages, notifications from other apps, low battery warning, etc., and optionally to facilitate locating the mobile phone in darkness.<ref name="PhoneArena"> [https://www.phonearena.com/news/Versus-For-and-against-LED-notification-lights-in-phones_id114862 Versus: For and against LED notification lights in phones]</ref><ref>[https://beebom.com/how-customize-notification-led-behavior-android/ How to customize notification LED behaviour on Android - BeeBom.com]</ref> It usually pulses in a continuous way to draw the attention of the user. It is a part of the device's [[notification system]] that uses a [[Cloud computing|cloud]]-powered [[Push technology|push]] [[notification service]] to relay remote notification messages to the user, or local notifications. Similar to audio notifications, a notification LED is a very battery-efficient way to inform the user of new notifications without turning on the screen at all.
== Overview ==
In any [[mobile phone]] or smartphone, battery life is an important consideration and the display is the component that consumes the maximum battery when it is fully lit up. In regular usage, a user may only want to briefly turn on
By blinking unobtrusively, the notification LED light discreetly conveys to the user of any potentially important message or call.
In some phones, the LED notification light is also sometimes designed to glow red when the battery is low,
While most phones used to include the notification LED light on the front side, some smartphone manufacturers like LG or Nokia
== Depreciation ==
Starting 2019 most smartphones vendors have stopped adding the notification LED which could be explained by the advent of [[Always-on display|AOD]] and a drive for smaller bezels.<ref>{{Cite web |last=Rahman |first=Mishaal |date=2019-07-21 |title=NotifyBuddy uses your phone's AMOLED display as a notification LED |url=https://www.xda-developers.com/notifybuddy-amoled-notification-led/ |access-date=2023-10-24 |website=XDA Developers |language=en}}</ref><ref>{{Cite web |date=2022-03-05 |title=The notification LED is almost dead, but one phone convinced me it should return |url=https://www.androidauthority.com/smartphone-notification-led-return-3120909/ |access-date=2023-10-24 |website=Android Authority |language=en}}</ref>
== Customization based on app ==
In some [[Android (operating system)|Android]] and [[BlackBerry]] smartphones, the notification LED light's behavior could be customized per app, so that, each color would indicate a different app. Apps like [[WhatsApp]] or [[Telegram (software)|Telegram]] also include a setting to set this color for the LED light.
== Alternative always on display feature ==
{{main|Always on Display}}
The notification LED light was popular when [[feature phone]]s were widely used. In early smartphones running [[Windows Mobile]] or the [[Android (operating system)|Android]] operating system, the LED notification light was also a fairly common feature. These smartphones usually had LCD
Gradually, the smartphone industry has been moving towards [[OLED]] displays. With this transition, the dedicated notification LED light has slowly been eliminated from newer smartphones. There is also a focus by smartphone designers to minimize the screen bezels or keep them very thin, thus leaving no room for the notification LED light.
As a replacement for the LED light, some smartphones from Samsung, LG, and Nokia include an [[Always On Display]] feature. On OLED displays, the Always-On Display (AOD) shows limited information while the phone is asleep, that is, when the entire display is not lit up. With OLED screens, only a part of the screen, or a few pixels on it can be turned on to convey information.
With any pixel on an OLED screen effectively being a notification LED, software can be used to customize its appearance. It can blink or pulse like a light continuously, or some phone manufacturers light up the display's pixels like a ring or have edge lighting.
{| class="wikitable sortable"
|+Smartphones with Notification LEDs (since 2017)
!Manufacturer
!Model
!Year
!LED Position
!LED Color
!Notes
|-
|Librem
|5
|2020
|Front Top
|RGB
|
|-
|OnePlus
|5
|2017
|Front Top
|RGB
|
|-
|OnePlus
|5t
|2017
|Front Top
|RGB
|
|-
|OnePlus
|6
|2018
|Front Top
|RGB
|Last OnePlus model with Notification LED
|-
|Samsung
|Galaxy J8
|2018
|?
|?
|
|-
|Sony
|Xperia 1
|2019
|Front Top
|RGB
|
|-
|Sony
|Xperia 1 II
|2020
|Front Top
|RGB
|
|-
|Sony
|Xperia 1 III
|2021
|Front Top
|RGB
|
|-
|Sony
|Xperia 1 IV
|2022
|Front Top
|RGB
|Last Xperia 1 series with Notification LED
|-
|Sony
|Xperia 5
|2019
|Front Top
|RGB
|
|-
|Sony
|Xperia 5 II
|2020
|Front Top
|RGB
|
|-
|Sony
|Xperia 5 III
|2021
|Front Top
|RGB
|
|-
|Sony
|Xperia 5 IV
|2022
|Front Top
|RGB
|Last Sony Xperia 5 series with Notification LED
|-
|Sony
|Xperia 10
|2019
|Front Top
|RGB
|
|-
|Sony
|Xperia 10 II
|2020
|Front Top
|RGB
|
|-
|Sony
|Xperia 10 III
|2021
|Front Top
|RGB
|
|-
|Sony
|Xperia 10 IV
|2022
|Front Top
|RGB
|Last Sony Xperia 10 series with Notification LED
|-
|Sony
|Xperia L3
|2019
|Front Top
|RGB
|
|-
|Sony
|Xperia XZ Premium
|2017
|Front Top
|RGB
|
|-
|Sony
|Xperia XZ1
|2017
|Front Top
|RGB
|
|-
|Sony
|Xperia XZ2 series
|2018
|Front Top
|RGB
|
|-
|Sony
|Xperia XZs
|2017
|Front Top
|RGB
|
|-
|Sony
|Xperia 8
|2019
|Front Top
|RGB
|
|-
|Sony
|Xperia L4
|2020
|Front Top
|RGB
|
|-
|Xiaomi
|Redmi Note 9
|2020
|Front Top
|?
|Also on various related models
|-
|Xiaomi
|Redmi Note 7
|2019
|?
|?
|
|-
|Samsung
|Galaxy S8 series
|2017
|Front Top
|RGB
|
|-
|Samsung
|Galaxy S9 series
|2018
|Front Top
|RGB
|Last Samsung flagship smartphone with Notification LED
|-
|Samsung
|Galaxy Note 8
|2017
|Front Top
|RGB
|
|-
|Samsung
|Galaxy Note 9
|2018
|Front Top
|RGB
|Last Samsung phablet with Notification LED
|-
|BlackBerry
|Key1
|2017
|Front Top
|RGB
|
|-
|BlackBerry
|Key2
|2018
|Front Top
|RGB
|
|-
|BlackBerry
|Motion
|2017
|Front Top
|RGB
|
|-
|Oppo
|Reno 7 Pro
|2021
|Rear Top
|Blue
|
|-
|Motorola
|Moto G7 series
|2019
|Front Top
|RGB
|May need 3rd party S/W to enable. May be sub-model distinctions.
|-
|Motorola
|Moto Z3
|2018
|Front Top
|?
|May need 3rd party S/W to enable.
|-
|Motorola
|Moto G5 series
|2017
|Front Top
|?
|May need 3rd party S/W to enable. May be sub-model distinctions.
|-
|Nokia
|3.2
|2019
|Side button
|White
|Overlaid with power button, white color only.
|-
|Nokia
|4.2
|2019
|Side button
|White
|Overlaid with power button, white color only.
|-
|Xiaomi
|Redmi K50
|2022
|Rear
|?
|Includes variants eg Poco F4 GT etc. Some are in camera module.
|-
|ASUS
|Zenfone 8
|2021
|Bottom Edge
|Simple color
|Reputedly only supports red, green and yellow
|-
|Xiaomi
|Mi 10T Pro
|2020
|Front, Top Left
|White
|
|-
|Huawei
|Y6 (2018)
|2018
|Front, Top Left
|RGB
|The phone uses Red, White, and Green (follows battery level) for generic notifications. Otherwise, the phone follows the LED color that the app uses.
|}
== References ==
{{Reflist}}
[[Category:Mobile phones]]
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