Editing Smartphone (section)

===Display===
{{main|Display device}}
[[File:Livraria do Senado (22622160063).jpg|thumb|A smartphone touchscreen]]
One of the main characteristics of smartphones is the [[Display device|screen]]. Depending on the device's design, the screen fills most or nearly all of the space on a device's front surface. Many smartphone displays have an [[Display aspect ratio|aspect ratio]] of [[16:9]], but taller aspect ratios became more common in 2017, as well as the aim to eliminate bezels by extending the display surface to as close to the edges as possible.

====Screen sizes====
Screen sizes are measured in diagonal [[inch]]es. Phones with screens larger than 5.2 inches are often called "[[phablet]]s". Smartphones with screens over 4.5 inches in size are commonly difficult to use with only a single hand, since most thumbs cannot reach the entire screen surface; they may need to be shifted around in the hand, held in one hand and manipulated by the other, or used in place with both hands. Due to design advances, some modern smartphones with large screen sizes and "edge-to-edge" designs have compact builds that improve their ergonomics, while the shift to taller aspect ratios have resulted in phones that have larger screen sizes whilst maintaining the ergonomics associated with smaller 16:9 displays.<ref name="phonearena-s7edgenotphablet">{{cite web|title=Don't call it a phablet: the 5.5" Samsung Galaxy S7 Edge is narrower than many 5.2" devices|url=http://www.phonearena.com/news/Dont-call-it-a-phablet-the-5.5-Samsung-Galaxy-S7-Edge-is-narrower-than-many-5.2-devices_id79482|website=PhoneArena|date=March 21, 2016 |access-date=3 April 2017}}</ref><ref name="verge-phabletpytha">{{cite web|title=We're gonna need Pythagoras' help to compare screen sizes in 2017|url=https://www.theverge.com/tldr/2017/3/30/15120824/screen-aspect-ratio-mathematics-galaxy-s8-lg-g6|website=The Verge|date=March 30, 2017|access-date=3 April 2017}}</ref><ref name="verge-s8aspectratio">{{cite web|title=The Samsung Galaxy S8 will change the way we think about display sizes|url=https://www.theverge.com/circuitbreaker/2017/3/30/15121526/samsung-galaxy-s8-vs-google-pixel-iphone-7-screen-size-comparison|website=The Verge|date=March 30, 2017|publisher=Vox Media|access-date=3 April 2017|archive-date=July 25, 2018|archive-url=https://web.archive.org/web/20180725110244/https://www.theverge.com/circuitbreaker/2017/3/30/15121526/samsung-galaxy-s8-vs-google-pixel-iphone-7-screen-size-comparison|url-status=dead}}</ref>

====Panel types====
[[Liquid-crystal display]]s (LCDs) and [[organic light-emitting diode]] (OLED) displays are the most common. Some displays are integrated with pressure-sensitive digitizers, such as those developed by [[Wacom (company)|Wacom]] and [[Samsung]],<ref>{{Cite journal|last1=Ward|first1=J. R.|last2=Phillips|first2=M. J.|date=1987-04-01|title=Digitizer Technology: Performance Characteristics and the Effects on the User Interface|journal=IEEE Computer Graphics and Applications|volume=7|issue=4|pages=31–44|doi=10.1109/MCG.1987.276869|s2cid=16707568|issn=0272-1716}}</ref> and Apple's [[Force Touch]] system. A few phones, such as the [[YotaPhone]] prototype, are equipped with a low-power [[electronic paper]] rear display, as used in [[e-book reader]]s.

====Alternative input methods====
[[File:Mobile_URL_tooltip.png|thumb|Tooltip in Kiwi Browser, a [[Google Chromium]] derivative, reveals the full URL by hovering over the [[tabbed browsing|tab]] list using the stylus on a [[Samsung Galaxy Note 4]].]]
[[File:HTC Legend - optic sensor.jpeg|thumb|Optical track pad sensor of an [[HTC Legend]], 2010.]]

Some devices are equipped with additional input methods such as a [[stylus]] for higher precision input and hovering detection or a [[Touchscreen#Self-capacitance|self-capacitive touch screen]]s layer for floating finger detection. The latter has been implemented on few phones such as the [[Samsung Galaxy S4]], [[Samsung Galaxy Note 3|Note 3]], [[Samsung Galaxy S5|S5]], [[Samsung Galaxy Alpha|Alpha]], and [[Sony Xperia Sola]], making the Galaxy Note 3 the only smartphone with both so far.

Hovering can enable preview [[tooltip]]s such as on the [[video player]]'s seek bar, in text messages, and quick contacts on the [[dial pad]], as well as [[lock screen]] animations, and the simulation of a [[mouseover|hover]]ing [[mouse cursor]] on web sites.<ref>{{cite web |title=How does Air view work? |url=https://www.samsung.com/global/galaxy/what-is/air-view/ |website=Samsung Galaxy site |language=en}}</ref><ref>{{cite web |title=Floating touch™ – Developer World |url=http://developer.sonymobile.com/knowledge-base/technologies/floating-touch |date=17 September 2012|archive-url=https://web.archive.org/web/20120917003815/http://developer.sonymobile.com/knowledge-base/technologies/floating-touch |archive-date=September 17, 2012 }}</ref><ref>{{cite web |title=How to Change Unlock Effect on Galaxy S4 Lock Screen |url=https://androidwidgetcenter.com/android-tips/how-to-change-unlock-effect-on-galaxy-s4-lock-screen/ |website=Android Widget Center |language=en |date=13 May 2013}}</ref>

Some styluses support hovering as well and are equipped with a button for quick access to relevant tools such as digital [[post-it note]]s and highlighting of text and elements when dragging while pressed, resembling drag selection using a [[computer mouse]]. Some series such as the [[Samsung Galaxy Note series]] and [[LG G Stylus]] series have an integrated tray to store the stylus in.<ref>{{cite web |title=S Pen on the Note 4 is better than ever: Feature Focus |url=https://www.androidauthority.com/note-4-s-pen-feature-532978/ |website=Android Authority |date=2 October 2014 |access-date=April 9, 2021 |archive-date=January 19, 2022 |archive-url=https://web.archive.org/web/20220119012837/https://www.androidauthority.com/note-4-s-pen-feature-532978/ |url-status=dead }}</ref>

Few devices such as the [[iPhone 6s]] until [[iPhone Xs]] and [[Huawei Mate S]] are equipped with a [[Force Touch|pressure-sensitive touch screen]], where the pressure may be used to simulate a gas pedal in video games, access to preview windows and shortcut menus, controlling the typing cursor, and a weight scale, the latest of which has been rejected by Apple from the [[App Store (iOS/iPadOS)|App Store]].<ref>{{Cite web|first=Lance |last=Whitney |date=2019-07-08|title=How to Use and Control 3D Touch on Your iPhone|url=https://uk.pcmag.com/gallery/121589/how-to-use-and-control-3d-touch-on-your-iphone|access-date=2021-04-02|website=PCMag UK|language=en-gb}}</ref><ref>{{Cite web|last=Zibreg|first=Christian|date=2015-10-28|title=Apple rejects Gravity, a 3D Touch-based iPhone 6s digital scale app|url=https://www.idownloadblog.com/2015/10/28/apple-pulls-gravity-app/|access-date=2021-04-02|website=iDownloadBlog.com|language=en-US}}</ref>

Some early 2010s HTC smartphones such as the [[HTC Desire|HTC Desire (Bravo)]] and [[HTC Legend]] are equipped with an optical track pad for scrolling and selection.<ref>{{cite web |title=HTC Bravo: TMO UK Nexus One Plus Optical Trackpad – Phandroid |url=https://phandroid.com/2010/01/21/htc-bravo-tmo-uk-nexus-one-plus-optical-trackpad/ |website=phandroid.com |access-date=20 July 2021 |date=21 January 2010}}</ref>

====Notification light====
[[File:Notification_LED.webm|thumb|right]]
{{Main article|Notification LED}}
Many smartphones except Apple iPhones are equipped with low-power [[light-emitting diode]]s besides the screen that are able to notify the user about incoming messages, missed calls, low battery levels, and facilitate locating the mobile phone in darkness, with marginial power consumption.

To distinguish between the sources of notifications, the colour combination and blinking pattern can vary. Usually three diodes in red, green, and blue ([[RGB]]) are able to create a multitude of colour combinations.