How does a filter improve readability?
The background is illuminated by the ambient light reflecting off the display surface. Filters work by attenuating the ambient light twice and the LED Hot once. A filter attenuates the ambient light when the light passes through the filter and after the ambient light has reflected off the background. A filter only attenuates light as it passes through the filter. Thus, a filter increases the difference between the “off” LEDs and the ” on” LEDs.
