Hardware Reference
In-Depth Information
• LCD displays have lower viewing angles than CRTs. This can be an important con-
sideration if you're planning to use your LCD monitor for group presentations. To im-
prove the horizontal viewing area, several manufacturers have developed patented im-
provementstothebasicTFTdisplay,suchasHitachi'sIPS,Fujitsu'smultidomainver-
ticaladjustment(MVA),andMitsubishi'sfeedforwarddriving(FFD)—mostofwhich
havebeenlicensedtootherleadingLCDmakers.Ifyouneedwiderangleviewingcap-
ability, look for LCD displays using these technologies to achieve horizontal viewing
angles of 170° or more.
• A high-contrast ratio (luminance difference between white and black) makes for
sharper text and vivid colors. Look for static contrast ratios of 1000:1 or more.
• Optional features such as integrated speakers, webcams, and USB hubs are available
on many displays.
LED Backlit Technology
An increasingly popular variation on standard LCD display technology replaces fluores-
cent tubes with LEDs for backlighting. By using LEDs instead of fluorescent tubes, dis-
play warmup time is nil and mercury, a major environmental concern when disposed of,
is no longer a concern when the display is scrapped. LED backlit displays also use about
half the energy of standard LCD displays.
Figure 12.22
illustrates how an LED backlit display works.
Figure 12.22
A diagram illustrating how an LED backlit display works.
