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Backlight usability

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[[Category:Mobile_Design]][[Category:Usability]]
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[[Category:Usability]]
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An application should make optimal use of backlight because it costs battery usage.
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==What is BackLight ?==
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Backlight is a form of illumination used in liquid crystal displays (LCDs).They are used in small displays(like mobile) to increase readability in low light conditions.
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==Need for proper usage of Backlight==
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An application should make optimal use of backlight because it costs  
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[[Optimizing battery life|battery usage]].<BR><BR>
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[[File:Backlight.jpg]]
  
 
== Some guidelines for backlight usability ==
 
== Some guidelines for backlight usability ==
  
 
* Backlight should be turned off when the application is idle.
 
* Backlight should be turned off when the application is idle.
 
 
* When the application is moved to background, the backlight should turn off after a while.
 
* When the application is moved to background, the backlight should turn off after a while.
 
 
* The default backlight settings should not be modified.
 
* The default backlight settings should not be modified.
 
 
* Backlight timeout period should be low.
 
* Backlight timeout period should be low.
 
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* Backlight behavior should be consistent in case of Voip applications vis-a-vis cell calls, i.e. if profile is silent on incoming cell calls the backlight blinks, the same should happen in the case of Voip calls also.
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* The user inactivity timer should not be tampered with unless there is a valid reason so to do, as this can impact the battery performance and stop the screen saver from coming on.
  
 
== Related link ==
 
== Related link ==
  
Check this link [http://wiki.forum.nokia.com/index.php/How_to_check_if_the_backlight_is_off_and_how_to_turn_it_on how to turn on the backlight]
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* [[How to check if the backlight is off and how to turn it on|How to turn on the backlight]]
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* [[Detecting user inactivity in Symbian OS|Detecting user inactivity in Symbian]]
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* [[How to keep backlight on|Keep backlight on in Python]]
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* [[TSS000268 - How to get a notification of user activity when the device has been idle?|How to get user activity notice when device has been idle]]

Latest revision as of 06:42, 9 May 2012

Article Metadata
Article
Created: User:Rahulsingh1m (26 Jun 2009)
Reviewed: SannaH (07 May 2012)
Last edited: hamishwillee (09 May 2012)

Contents

[edit] What is BackLight ?

Backlight is a form of illumination used in liquid crystal displays (LCDs).They are used in small displays(like mobile) to increase readability in low light conditions.

[edit] Need for proper usage of Backlight

An application should make optimal use of backlight because it costs battery usage.

Backlight.jpg

[edit] Some guidelines for backlight usability

  • Backlight should be turned off when the application is idle.
  • When the application is moved to background, the backlight should turn off after a while.
  • The default backlight settings should not be modified.
  • Backlight timeout period should be low.
  • Backlight behavior should be consistent in case of Voip applications vis-a-vis cell calls, i.e. if profile is silent on incoming cell calls the backlight blinks, the same should happen in the case of Voip calls also.
  • The user inactivity timer should not be tampered with unless there is a valid reason so to do, as this can impact the battery performance and stop the screen saver from coming on.

[edit] Related link

This page was last modified on 9 May 2012, at 06:42.
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