win os & hardware. monitors most desktop displays use a cathode ray tube (crt), while portable...

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


1080i1080i - 1920x1080 pixels interlaced - 1920x1080 pixels interlaced


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


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


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

win os & hardware. monitors most desktop displays use a cathode ray tube (crt), while portable...

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