Reflection and Reflective Loss
Reflection is the main cause of reduced contrast. A percentage of the light in any environment will naturally bounce off the surface of the display. As the ambient light increases, the percentage of reflection becomes significant. As the light passes from one medium to another; as from a protective window or touch screen to the display surface, the difference between the "index of refraction" in the two mediums create a transitional phase difference, increasing reflection. What's more, the reflection from each surface is cumulative. If the combined reflection from all surfaces is greater than the light output of the display, the display washes out and is unreadable.
To solve this problem, you either have to decrease the reflection or significantly increase the light output. Since adding backlights can cause issues in some environments, Our optical engineers first look at ways to reduce reflection and reflective loss.
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