HP (Hewlett-Packard) L1798A ユーザーズマニュアル

ページ / 78
Glossary
DLP
 is a Texas Instruments technology through which color images are made 
by shining colored light onto a digital micromirror device (DMD) impregnated 
with small, movable mirrors. Each micromirror is responsible for an individual 
pixel and can oscillate several thousand times per second. The process reduces 
“pixelation” by increasing “active area” of the pixel. Major advantages: 
excellent, bright picture with good black quality; better visibility from side 
viewing angles; capable of displaying HDTV at full resolution; produces less 
heat; more reliable; no burn in; no maintenance. Major disadvantages: 
comparatively expensive; limited viewing angle.
LCOS is an emerging LCD-based technology that reflects rather than directly 
transmits light. LCOS projectors direct light through a series of polarizers, 
again using three separate LCD panels, one for each RGB color. Major 
advantages: excellent picture quality; high resolutions; slim profile. Major 
disadvantages: expensive; poor black quality.
0–9
5.1-channel surround system 
A speaker setup that places one speaker above 
or below a television, on each side of the display, and two beside or just 
behind the listener (standard surround). A subwoofer is usually placed to the 
front of the listener. A surround system creates a more immersive, realistic 
sound experience—the more speakers, the richer the sound. 
7.1-channel surround system
 A speaker setup that places one speaker above 
or below a television, one on each side of the display, two beside or slightly 
behind the listener (standard surround), two behind the listener (surround 
back channels), and a subwoofer to the front of the listener. A surround 
system creates a more immersive, realistic sound experience—the more 
speakers, the richer the sound. 
480i (480-line interlaced scan)
 The vertical resolution of standard-definition 
broadcasts, and the original resolution technology. Picture is 704 x 480 pixels, 
sent at 60 interlaced frames per second (30 complete frames per second).
480p (480-line progressive scan)
 The vertical resolution of standard-definition 
and some enhanced-definition broadcasts. Picture is 704 x 480 pixels, sent 
at 60 complete frames per second.
720i (720-line interlaced scan) 
The vertical resolution of some high-definition 
broadcasts. Picture is 1280 x 720 pixels, sent at 60 interlaced frames per 
second (30 complete frames per second).
720p (720-line progressive scan)
 The vertical resolution of some high-definition 
broadcasts. Picture is 1280 x 720 pixels, sent at 60 complete frames per second.
Appendix C
75