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A higher resolution on your external monitor might also mean a slower
refresh rate, the speed at which a monitor sends a new image to the screen.
A cathode ray tube (CRT) sends an image vertically down a screen one line
at a time. The whole screen is thus refreshed at a certain interval (as the
CRT cycles down the screen and then returns to the top). This speed is
usually measured in Hz (cycles per second), which is a unit of frequency.
A refresh rate of 60 Hz will produce a slightly perceptible flicker of the
screen that can cause eyestrain. A rate of 72 Hz or faster will usually pro-
duce a comfortable image. Your monitor may refresh at different frequen-
cies depending on the resolution. Check your monitor specifications for he
refresh rate; this may help prevent eyestrain. If you do need to use another
driver with your external monitor, you might need to reset the driver for the
LCD to achieve optimal display quality on the LCD. Windows will usually
provide you with a chance to review the changes and cancel them. It will
also usually instruct you if you need to restart the system.
Be sure to shut down your system before connecting the device to your
system to prevent damage to your system and the external monitor.
6.5
Figure 6.3: Location of ports on the rear of the WinBook notebook
Directing the video output
to both the LCD and the
video monitor will slightly
slow the video response time.
Chapter 6: Video Settings
Parallel Port Serial Port VGA Port USB Slot Modem
Port
LAN Port
Cooling
Fan
PS/2 Port
X Manual WinME w/photos 2/01/01 3/19/01 4:24 PM Page 109