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**gdjfhdf** · 08-18-2009, 08:46 AM

Don't CRT's have an "infinite" contrast ratio, since they display true blacks?

The contrast ratio is a comparison of the luminance of the brightest and darkest colours generated by a display; therefore, it's impossible to have an infinite ratio, even with a CRT, as the darkest colour will still have some luminance value. It is, though, significantly higher than an LCD display by virtue of the fact that the black colour is a genuine lack of emitted light; an LCD will always transmit some light, even at full polarisation.

08-18-2009, 08:46 AM	#33
gdjfhdf Join Date Oct 2005 Posts 429 Senior Member	Don't CRT's have an "infinite" contrast ratio, since they display true blacks? The contrast ratio is a comparison of the luminance of the brightest and darkest colours generated by a display; therefore, it's impossible to have an infinite ratio, even with a CRT, as the darkest colour will still have some luminance value. It is, though, significantly higher than an LCD display by virtue of the fact that the black colour is a genuine lack of emitted light; an LCD will always transmit some light, even at full polarisation.
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