VarTech Systems DiamondVue VT084C User Manual

Contents

VarTech Systems DiamondVue VT084C User Manual Manual pdf 3 page image

8.4’ DiamondVue User Guide 150.028LCDsINTRODUCTIONINTRODUCTION1SectionAbout LCD MonitorsWhat you gain by using an LCD monitor in your industrial controlsare the future of display technology. Although CRTS have dropped in costsignificantly, they do not offer the performance, reliability, and mountingoptions available with LCDs. LCD monitors consist primarily of an LCD,Video Board and a Back Light video. The LCD determines to a largeextent the viewing angle, brightness and contrast. Beyond that it is functionof the video board which converts the analog RGB (Red, Green, Blue) signals from a standardvideo 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 the introduction of thescaling engine. The converter will mathematically recalculate the 640x480 to 1024x768. This maysound simple but it is in fact a complex algorithm that adjusts for different aspect ratios and pixelalignment, essentially smoothing text and graphics to produce a picture that is pleasant to the eye.All Vartech displays from 12.1” (800x600) to 23.1 (1600x1200) incorporate scaling engines in theconverter card.11.1