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Section
1
1.1
About LCD Monitors
What you gain by using an LCD monitor in your industrial controls
LCDs
angle, brightness and contrast. Beyond that it is the function of the video board which converts the analog
RGB (Red, Green, Blue) signals from a standard video card to a high quality, digital RGB that the LCD
can display.
Recently the video card has taken on a new role. It is the responsibility of this device to "scale" a
particular video resolution to the "native" resolution of the LCD. Simply, consider that a computer is
putting out a VGA [640x480] resolution signal, yet the LCD that is connected is an XGA [1024x768]
display. The
displayed picture would be in the center 1/3 of the LCD. With the introduction of the
scaling engine. The converter will mathematically recalculate the 640x480 to 1024x768. This may sound
simple but it is in fact a complex algorithm that adjusts for different aspect ratios and pixel alignment,
essentially smoothing text and graphics to produce a picture that is pleasant to the eye.
17.0" PowerVue User Guide
are the future of display technology. CRTs, although they have dropped in cost
significantly, do not offer the performance, reliability, and mounting options
available with LCDs. LCD monitors consist primarily of an LCD, Video Board
and a Back Light video. The LCD determines to a large extent the viewing
1
INTRODUCTION
150-059
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