Display Brightness
The brightness of an LCD display is the amount
of light emitted and is measured in nits or
candelas per square meter, which has units of
nits or cd/m2. Most commercial desktop
displays have a brightness of 200 to 300 nits. To
see a display in outdoor light requires a
brightness of about 700 nits or greater. Almost
all new LCD displays use some form of white or
RGB LED backlight.
Display Brightness Half-Life
An important characteristic of an LED backlight
is the brightness half-life, which is the time
measured in hours that the brightness output
will decrease by half after running the LED
backlight at full brightness. The decrease in
brightness will not substantially decrease after
the half-life time has elapsed. Most displays
have a half-life of around 50.000 hours (or 5.7
years). Some of the brighter displays can have
a half-life of 20.000 hours or less.
Bright Idea: The brightness life of the display
can be dramaticallyincreased and burn-in can
be mitigated by allowing the screen saver to
dim and/or turn off the display when not in use.
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