NEC SpectraView Profiler 5 User Manual page 55

Profiler
User Manual
Tip: Contrast control in LCDs
The contrast control (OSD) of an LCD
monitor works completely differently from
CRTs. In most cases, there is no need to
change the contrast settings. Please reset
contrast to factory settings before attempt-
ing to calibrate an LCD monitor.
Black luminance
For the visual appearance of a monitor, not only the tonal response
curve and the white luminance are of importance, but also the black
luminance. SpectraView Profiler 5 allows you to calibrate monitors to a
defined black luminance. Here the highest black luminance is the refer-
ence for harmonizing multiple monitors.
In order to determine the min. black luminance for your monitor, you need
to calibrate the monitor with the „Mini- mum" radio button checked.
In order to determine the black luminance of a second monitor, create
a black desktop on that monitor, click the <Measure> button and follow
the instructions on the screen.
Contrast
The ratio between brightest and darkest value of a monitor is called
contrast ratio. The higher the contrast ratio, the better is the differentia-
tion of tonal values.
If white luminance and black luminance of two monitors are equal, the
contrast ratio is the same. So, it is irrelevant if you calibrate to the same
white and black luminances or the same luminance and contrast ratios.
Specify
Here you select the two parameters you intend to use for the calibration,
the third one will be grayed out and will be calculated automatically.
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