VarTech Systems DiamondVue VT190C User Manual

Contents

VarTech Systems DiamondVue VT190C User Manual Manual pdf 3 page image

VT190 DiamondVue User Guide 150-065INTRODUCTIONINTRODUCTION1SectionAbout LCD MonitorsWhat you gain by using an LCD monitor in your industrial controlsLCDsLCDsLCDs are the future of display technology. CRTs although they have droppedin cost significantly, do not offer the performance, reliability, andmounting options available with LCDs. LCD monitors consist primarily ofan LCD, Video Board and a Back Light video. The LCD determines to alarge extent the viewing angle, brightness and contrast. Beyond that it isthe function of the video board which converts the analog RGB (Red, Green, Blue) signals from astandard 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” aparticular video resolution to the “native” resolution of the LCD. Simply, consider that a computer isputting 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 theintroduction of the scaling engine. The converter will mathematically recalculate the 640x480 to1024x768. This may sound simple but it is in fact a complex algorithm that adjusts for differentaspect ratios and pixel alignment, essentially smoothing text and graphics to produce a picturethat is pleasant to the eye.All Vartech displays from 12.1” (800x600) to 23.1 (1600x1200) incorporate scaling engines in theconverter card.1.11