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Distinguishing Backlight from Brightness...


In a message dated 7/29/05 10:22:23 AM, email@hidden writes:


C.D., could you please go over briefly what is it that makes the Brightness
knob on an LCD actually a "backlight" control as opposed to a Luminance
control on a CRT?


If you look at the hardware control with the open sun icon on an Apply Cinema Display front panel, you are seeing a backlight control marked as a brightness control. As the on-line help in Spyder2PRO explains, the easiest trick to distinguish the two in most cases is to lower the control while the on-screen menu is up; if the whole screen, on-screen menu and all, darkens, its probably a backlight control. If the rest of the screen darkens, and the on-screen menu does not, its probably a brightness control in a similar sense to those on a CRT. For the Cinema Displays, simply keep in mind that the only control they offer (short of removing the bezel) is a backlight control, no matter what they call it.

C. David Tobie
Product Technology Manager
ColorVision Inc.
email@hidden
www.colorvision.com 
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