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Win OS & HardwareWin OS & Hardware
MonitorsMonitors
Most desktop displays use a Most desktop displays use a cathode ray tube (CRT), while cathode ray tube (CRT), while
portable computing devices use portable computing devices use liquid crystal display (LCD), light-liquid crystal display (LCD), light-
emitting diode (LED), or gas plasmaemitting diode (LED), or gas plasma
MonitorsMonitorsDisplay technologyDisplay technology - Choices are mainly - Choices are mainly between CRT and LCD technologies. between CRT and LCD technologies. Cable technologyCable technology - VGA and DVI are the two - VGA and DVI are the two most common. most common. Viewable areaViewable area (usually measured diagonally) (usually measured diagonally) Aspect ratioAspect ratio and and orientationorientation (landscape or (landscape or portrait) portrait) Maximum resolutionMaximum resolution Dot pitchDot pitch Refresh rateRefresh rate Color depthColor depth
MonitorsMonitors
Cable TechnologyCable Technology
HD15/DB15HD15/DB15
1: Red out 6: Red return (ground) 11: Monitor ID 0 in
2: Green out 7: Green return (ground) 12: Monitor ID 1 inor data from display
3: Blue out 8: Blue return (ground) 13: Horizontal Sync out
4: Unused 9: 14: Vertical Sync 5
10: Sync return (ground) 15: Monitor ID 3 inor data clock
MonitorsMonitorsCable Technology - DVICable Technology - DVI
MonitorsMonitors
Viewable Area:Viewable Area:
Common Monitor Sizes areCommon Monitor Sizes are
14”, 15”, 17”, 19”14”, 15”, 17”, 19”
20”, 21”, 22”, 24”20”, 21”, 22”, 24”
32”, 42”, 50”, 60”32”, 42”, 50”, 60”
MonitorsMonitors
Viewable Area:Viewable Area:
Measured DiagonallyMeasured Diagonally
CRT/LCD – 4:3 RatioCRT/LCD – 4:3 Ratio
LCD/Plasma – 16:9 RatioLCD/Plasma – 16:9 Ratio
MonitorsMonitors
4:3 4:3 (1.33:1)(1.33:1) vs 16:9 vs 16:9 (1.85.1)(1.85.1) Aspect Ratio Aspect Ratio
MonitorsMonitorsHDTV DifferencesHDTV Differences
1) Wider images 1) Wider images
2) Much more detailed pictures 2) Much more detailed pictures
3) 5.1 channel CD-quality Dolby Digital 3) 5.1 channel CD-quality Dolby Digital (AC-3) surround sound (AC-3) surround sound
4) The ability to send data directly to a 4) The ability to send data directly to a screen or to a PC as a download screen or to a PC as a download (The (The actual HDTV transmission is based on a actual HDTV transmission is based on a 19.3-Mbps digital data stream.) 19.3-Mbps digital data stream.)
MonitorsMonitors
HDTVHDTV10x more picture detail than NTSC10x more picture detail than NTSC
480p480p - 640x480 pixels progressive - 640x480 pixels progressive
720p720p - 1280x720 pixels progressive - 1280x720 pixels progressive
1080i1080i - 1920x1080 pixels interlaced - 1920x1080 pixels interlaced
1080p1080p - 1920x1080 pixels progressive - 1920x1080 pixels progressive
MonitorsMonitors
HDTVHDTVIn an In an interlacedinterlaced format, the screen shows format, the screen shows every odd line at one scan of the screen, every odd line at one scan of the screen,
and then follows that up with the even lines and then follows that up with the even lines in a second scan. Since there are 30 frames in a second scan. Since there are 30 frames
shown per second, the screen shows one shown per second, the screen shows one
half of the frame every sixtieth of a secondhalf of the frame every sixtieth of a second
MonitorsMonitors
HDTVHDTVProgressiveProgressive scanning shows the whole scanning shows the whole picture, every line in one showing, every picture, every line in one showing, every sixtieth of a second. This provides for a sixtieth of a second. This provides for a much smoother picture, but uses slightly much smoother picture, but uses slightly
more bandwidth.more bandwidth.
MonitorsMonitors
HDTVHDTV
Sony Wega 42" XBR Plasma TV with built-in HDTV tuner
MonitorsMonitors
HDTVHDTV
Digital Television Prospects:Digital Television Prospects:
3D Internet3D Internet
Interactive Television & MoviesInteractive Television & Movies
VotingVoting
CommunicationCommunication
Etc…Etc…
MonitorsMonitors
Maximum ResolutionMaximum Resolution
Resolution refers to the number of Resolution refers to the number of individual dots of color, known as individual dots of color, known as
pixelspixels, that are contained in a , that are contained in a display display
MonitorsMonitors
Dot PitchDot Pitch
The measure of The measure of how much space how much space there is between there is between a display's pixels a display's pixels
MonitorsMonitorsDot Pitch:Dot Pitch:
Dot Pitch
Approx. number ofpixels/cm2
Approx. number ofpixels/in2
.25 mm 1,600 10,000
.26 mm 1,444 9,025
.27 mm 1,369 8,556
.28 mm 1,225 7,656
.31 mm 1,024 6,400
.51 mm 361 2,256
1 mm 100 625
MonitorsMonitorsDot Pitch:Dot Pitch:
The smaller and closer the dots are The smaller and closer the dots are to one another, the more realistic to one another, the more realistic and detailed the picture appears and detailed the picture appears
MonitorsMonitorsRefresh RateRefresh Rate
The number of times that the image The number of times that the image on the display is drawn each on the display is drawn each
second second
MonitorsMonitorsRefresh RateRefresh Rate
Refresh rates are very important Refresh rates are very important because they control flicker, and because they control flicker, and
you want the refresh rate as high as you want the refresh rate as high as possible. Too few cycles per second possible. Too few cycles per second
and you will notice a flickering, and you will notice a flickering, which can lead to headaches and which can lead to headaches and
eye straineye strain
MonitorsMonitorsRefresh RateRefresh Rate
InterlacingInterlacing
Non-InterlacingNon-Interlacing
MonitorsMonitorsColor DepthColor Depth
4-bit4-bit
8-bit8-bit
16-bit16-bit
24-bit24-bit
32-bit32-bit
MonitorsMonitorsTypical CRT/LCD MonitorsTypical CRT/LCD Monitors
MonitorsMonitors
Questions?Questions?
MonitorsMonitors
Assignment 02Assignment 02
Look some information about Look some information about nanotube technology as it relates nanotube technology as it relates
to computer technologyto computer technology
Due: Friday Sep. 16, 2005Due: Friday Sep. 16, 2005
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