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Chapter 7Chapter 7
ITE 1ITE 1
Laser PrintersLaser Printers• Use electrophotographic
technologies• The drum is coated with a light-sensitve
material• The image is written to the drum with a
laser• The drum then picks up toner in the
shape of the image. It is then deposited on the paper and fused onto the paper with heat.
• Use electrophotographic technologies• The drum is coated with a light-sensitve
material• The image is written to the drum with a
laser• The drum then picks up toner in the
shape of the image. It is then deposited on the paper and fused onto the paper with heat.
Impact PrintersImpact Printers
• Can make carbon copies (NCR Forms)
• The ribbons tend to be cheaper to use than ink cartridges or toner.
• Can make carbon copies (NCR Forms)
• The ribbons tend to be cheaper to use than ink cartridges or toner.
InkjetsInkjets
• Spray ink onto the paper to form images.
• Quality is measured in dots per inch. DPI
• Nozzles can clog
• Spray ink onto the paper to form images.
• Quality is measured in dots per inch. DPI
• Nozzles can clog
Piezoelectric PrintersPiezoelectric Printers
• Are rare• Use a vibrating crystal to control
ink flow.
• Are rare• Use a vibrating crystal to control
ink flow.
WiFiWiFi
• WiFi Standards Currently Being Used:• 802.11b• 802.11g• 802.11n (New)
• WiFi Standards Currently Being Used:• 802.11b• 802.11g• 802.11n (New)
Solid ink printersSolid ink printers
• Produce vivid colors• We have one in this room.
• Produce vivid colors• We have one in this room.
Thermal PrintersThermal Printers
• Are used to avoid having to worry about ink or toner.
• Often used in cash registers and gas pumps to print receipts.
• Are used to avoid having to worry about ink or toner.
• Often used in cash registers and gas pumps to print receipts.
ScannersScanners• Pages scanned are brought in as images• You cannot edit them as a word
processing file• OCR (Optical Character Recognition)
software can solve this problem.
• Drum scanners produce the highest quality images while handheld and flatbed scanners are easier on the originals.
• Pages scanned are brought in as images• You cannot edit them as a word
processing file• OCR (Optical Character Recognition)
software can solve this problem.
• Drum scanners produce the highest quality images while handheld and flatbed scanners are easier on the originals.
All-In-One DevicesAll-In-One Devices
• Combine Fax, Scanning and Printing in One Device
• Combine Fax, Scanning and Printing in One Device
FirewireFirewire
• Called the IEEE1394• Also called I.Link• Can use up to 63 devices on
one port.
• Called the IEEE1394• Also called I.Link• Can use up to 63 devices on
one port.
Parallel Printer PortsParallel Printer Ports• Seldom used anymore.• Newer machines may not have one.
• Met the IEEE1284 Standard.• Bidirectional communications from
IEEE1284 are ECP and EPP.• The return communications were for low
ink warnings etc. • Some early webcams used the parallel
port.
• Seldom used anymore.• Newer machines may not have one.
• Met the IEEE1284 Standard.• Bidirectional communications from
IEEE1284 are ECP and EPP.• The return communications were for low
ink warnings etc. • Some early webcams used the parallel
port.
That’s It!That’s It!
• Good luck on the test!• Good luck on the test!