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Old 01-21-2014, 04:17 AM   #25
pdurrant
The Grand Mouse 高貴的老鼠
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Location: Norfolk, England
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Quote:
Originally Posted by HarryT View Post
Thanks. So reflectance is not a measure of how shiny a screen is, but how white it appears when illuminated by white light? High reflectance = a whiter background?
In the way you're using whiteness, yes. But Whiteness is actually a separate measure.

Reflectance is a measure of how much incident light is reflected by a surface. It says nothing about how it is reflected - whether smoothly like a mirror, or randomly like a piece of paper.

Whiteness is a measure of how evenly a surface reflects light across the visible spectrum.

Gold, for example, has a very high reflectance, but very low whiteness, since it reflects blue light much less well than red light.

A display for use without a built-in light source, i.e. that relies on ambient light, should have a high reflectance, a high whiteness, and high contrast.
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