Editing Contrast ratio (section)

== Contrast ratio in a real room ==
In marketing literature, contrast ratios for emissive (as opposed to reflective) displays are always measured under the optimum condition of a room in total darkness. In typical viewing situations, the contrast ratio is significantly lower due to the reflection of light from the surface of the display, making it harder to distinguish between different devices with very high contrast ratios.<ref name=realenv>''www.poynton.com''. [http://www.poynton.com/notes/Timo/Weber_and_contrast_ratio.html On practical contrast ratios in real environments]</ref> How much the room light reduces the contrast ratio depends on the [[luminance]] of the display, as well as the amount of light reflecting off the display.<ref>HomeTheaterMag.com - [http://blog.hometheatermag.com/geoffreymorrison/111705contrast/ Contrast Ratio – The Useless Statistic] {{Webarchive|url=https://web.archive.org/web/20090709020928/http://blog.hometheatermag.com/geoffreymorrison/111705contrast/ |date=2009-07-09 }}</ref>

A clean print at a typical [[movie theater]] may have a contrast ratio of 500:1,<ref name=dalite>''www.da-lite.com''. [http://www.da-lite.com/education/angles_of_view.php?action=details&issueid=56 Contrast - From Dark to Light]. Angles of View vol. III.</ref> a transmissive digital projector is around 200:1, and a reflective digital projector (i.e. DLP) is around 500:1 under nearly ideal circumstances.<ref>{{cite web|last1=Powell|first1=Evan|title=Let's Ignore Contrast Specs|url=http://www.projectorcentral.com/contrast_ratios.htm?page=Projector-Central-Measurements|website=ProjectorCentral.com|access-date=11 March 2016|date=27 March 2008}}</ref>{{Better source needed|date=October 2019}} A modern computer LCD monitor is typically at 1000:1,<ref>For example, {{cite web|title=Apple Thunderbolt Display|url=https://www.apple.com/displays/specs.html|publisher=Apple|archive-url=https://web.archive.org/web/20151222044952/https://www.apple.com/displays/specs.html|access-date=21 May 2015|archive-date=2015-12-22}}</ref> and TVs might be over 4000:1.<ref>{{cite web|last1=Demers|first1=Cedric|title=Contrast Ratio of 2015 TVs|url=http://www.rtings.com/info/contrast-ratio-tvs|website=[[RTINGS.com]]|access-date=21 May 2015}}</ref> Dynamic contrast ratio is usually measured at factory with two panels (one versus another) of the same model as each panel will have an inherent dark and light (hot) spot. Static is usually measured with the same screen showing half screen full bright vs half screen full dark. This usually results in a lower ratio as brightness will creep into the dark area of the screen thus giving a higher luminance.{{citation needed|date=March 2016}}