"Ambient Contrast"
The contrast that can be experienced or measured in the presence of ambient illumination is shortly called "ambient contrast". A special kind of "ambient contrast" is the contrast under outdoor illumination conditions when the illuminance can be very intense (up to 100.000 lx). The contrast apparent under such conditions is called "daylight contrast".
Since always the dark areas of a display are corrupted by reflected light, reasonable "ambient contrast" values can only be maintained when the display is provided with efficient measures to reduce reflections by anti reflection and/or anti-glare coatings.
Read more about this topic: Display Contrast
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