×
Namespaces

Variants
Actions
(Difference between revisions)

Backlight usability

From Nokia Developer Wiki
Jump to: navigation, search
hamishwillee (Talk | contribs)
m (Bot change of links to internal format.)
hamishwillee (Talk | contribs)
m (Hamishwillee - Bot update - Fix ReviewerApproval and ArticleMetaData etc)
Line 1: Line 1:
{{ReviewerApproved}}
+
{{ArticleMetaData <!-- v1.1 -->
[[Category:Mobile_Design]][[Category:Usability]]
+
|sourcecode= <!-- Link to example source code e.g. [[Media:The Code Example ZIP.zip]] -->
 +
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
 +
|devices= <!-- Devices tested against - e.g. ''devices=Nokia 6131 NFC, Nokia C7-00'') -->
 +
|sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Qt SDK 1.1.4]) -->
 +
|platform= <!-- Compatible platforms - e.g. Symbian^1 and later, Qt 4.6 and later -->
 +
|devicecompatability= <!-- Compatible devices e.g.: All* (must have internal GPS) -->
 +
|dependencies= <!-- Any other/external dependencies e.g.: Google Maps Api v1.0 -->
 +
|signing= <!-- Signing requirements - empty or one of: Self-Signed, DevCert, Manufacturer -->
 +
|capabilities= <!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. -->
 +
|keywords= <!-- APIs, classes and methods (e.g. QSystemScreenSaver, QList, CBase -->
 +
|id= <!-- Article Id (Knowledge base articles only) -->
 +
|language= <!-- Language category code for non-English topics - e.g. Lang-Chinese -->
 +
|translated-by= <!-- [[User:XXXX]] -->
 +
|translated-from-title= <!-- Title only -->
 +
|translated-from-id= <!-- Id of translated revision -->
 +
|review-by= <!-- After re-review: [[User:username]] -->
 +
|review-timestamp= <!-- After re-review: YYYYMMDD -->
 +
|update-by= <!-- After significant update: [[User:username]]-->
 +
|update-timestamp= <!-- After significant update: YYYYMMDD -->
 +
|creationdate= 20090626
 +
|author= [[User:Rahulsingh1m]]
 +
}}
 +
 
 +
[[Category:Mobile Design]][[Category:Usability]]
  
 
==What is BackLight ?==
 
==What is BackLight ?==

Revision as of 07:11, 13 February 2012

Article Metadata
Article
Created: User:Rahulsingh1m (26 Jun 2009)
Last edited: hamishwillee (13 Feb 2012)

Contents

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.

Need for proper usage of Backlight

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

Backlight.jpg

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.

Related link

216 page views in the last 30 days.
×