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!