FUNDAMENTAL FUNDAMENTAL PARTS OF A PARTS OF A COMPUTERCOMPUTER

Output DevicesOutput Devices

REVIEWREVIEW1. An input device with a set of 1. An input device with a set of typewriter like keys that typewriter like keys that enables you to enter data.enables you to enter data.

2. The standard lay-out of the 2. The standard lay-out of the keyboard.keyboard.

3. An input devices that controls 3. An input devices that controls the movement of the cursor.the movement of the cursor.

OUTPUT DEVICESOUTPUT DEVICES•Is any peripheral device Is any peripheral device that presents, displays, that presents, displays, alters, or records output alters, or records output after it has left a after it has left a computer’s system.computer’s system.

COMPUTER SPEAKERCOMPUTER SPEAKER•CONVERT CONVERT OUTPUT DATA OUTPUT DATA INTO SOUND.INTO SOUND.

MONITORMONITOR•IS THE MOST POPULAR OUTPUT IS THE MOST POPULAR OUTPUT

DEVICE, IT RECIEVES SIGNALS DEVICE, IT RECIEVES SIGNALS FROM A VIDEO CARD INSIDE OF FROM A VIDEO CARD INSIDE OF THE SYSTEM UNIT AND GIVES THE SYSTEM UNIT AND GIVES THE USER A GRAPHICAL OR THE USER A GRAPHICAL OR TEXTUAL DISPLAY.TEXTUAL DISPLAY.

OLD AND MODERN OLD AND MODERN MONITORMONITOR• CATHODE RAY TUBE (CRT)CATHODE RAY TUBE (CRT) • LIQUID CRYSTAL DISPLAY (LCD)LIQUID CRYSTAL DISPLAY (LCD)

PRINTERPRINTER•CREATE IMAGES ON PAPER, CREATE IMAGES ON PAPER,

PLASTIC, CLOTH AND OTHER PLASTIC, CLOTH AND OTHER PRINT MEDIA USING PRINT MEDIA USING TEACHNOLOGIES LIKE INK TEACHNOLOGIES LIKE INK TRANSFER, HEAT TRANSFER, TRANSFER, HEAT TRANSFER, CHEMICAL REACTIONS, AND CHEMICAL REACTIONS, AND PHYSICAL FORCE.PHYSICAL FORCE.

Types of PrintersTypes of Printers•Laser Printers-Laser Printers- uses toner and uses toner and

internal laser to print. The most internal laser to print. The most popular is HP (Hewlett Packard. popular is HP (Hewlett Packard. Most laser printers offer Most laser printers offer excellent printing capability. The excellent printing capability. The average average laser printers prints in laser printers prints in black. black. Color laser printers are Color laser printers are about three to four times the about three to four times the cost of one color laser printers.cost of one color laser printers.

INKJET OR BUBBLE JETINKJET OR BUBBLE JET •USES INK TO PRINT. USUALLY ARE USES INK TO PRINT. USUALLY ARE

AVAILABLE IN COLOR. THE QUALITY AVAILABLE IN COLOR. THE QUALITY OF THE PRINT IS DETERMINED BY OF THE PRINT IS DETERMINED BY THE THE DPI (Dots Per Inch).DPI (Dots Per Inch). The higher The higher the DPI resolution the better quality the DPI resolution the better quality of the print. This is based on the of the print. This is based on the number of dots that the printer can number of dots that the printer can draw within one square inch.draw within one square inch.

DOT-MATRIX PRINTERDOT-MATRIX PRINTER•CREATES CHARACTERS BY CREATES CHARACTERS BY

STRIKING PINS AGAINTS AN STRIKING PINS AGAINTS AN INK RIBBON. EACH PIN INK RIBBON. EACH PIN MAKES A DOT, AND MAKES A DOT, AND COMBINATIONS OF DOTS COMBINATIONS OF DOTS FORM CHARACTERS AND FORM CHARACTERS AND ILLUSTRATIONS.ILLUSTRATIONS.

PRINTERS ARE ALSO PRINTERS ARE ALSO CLASSIFIED BY THE FF. CLASSIFIED BY THE FF. CHARACTERISTIC:CHARACTERISTIC:•QUALITY OF TYPE: the output QUALITY OF TYPE: the output

should be either letter quality, near should be either letter quality, near letter quality, or draft quality.letter quality, or draft quality.

•SPEED: measured by characters SPEED: measured by characters per second (cps) or pages per per second (cps) or pages per minute (ppm), the speed of minute (ppm), the speed of printers varies widely.printers varies widely.

• IMPACTIMPACT: impact printers include : impact printers include all printers that work by striking all printers that work by striking an ink ribbon, like daisy wheel, an ink ribbon, like daisy wheel, dot-matrix, and line printers.dot-matrix, and line printers.

•NON IMPACT-NON IMPACT- non impact non impact printers include laser printers printers include laser printers and ink jet printers.and ink jet printers.

•The differences between impact The differences between impact and non-impact printers is that and non-impact printers is that impact printers are impact printers are much noisier.much noisier.

OTHER OUTPUT DEVICESOTHER OUTPUT DEVICES• HEADPHONE PROJECTORHEADPHONE PROJECTOR

It is another version of speaker that is worn in or over the ears to hear audio or sounds.

It allows the information to be displayed on the big screen so that the projected information can be seen in larger image.

END OF THE LESSONEND OF THE LESSONThanks for ListeningThanks for Listening

TEST YOUR SELFTEST YOUR SELF• An output device that convert data An output device that convert data

into sound. into sound. • Gives the user the graphical or textual Gives the user the graphical or textual

display.display.• Create images on paper or other print Create images on paper or other print

media.media.• A printer that uses ink to print.A printer that uses ink to print.• Printing speed is measured in cps or Printing speed is measured in cps or

ppm. What is cps and ppm?ppm. What is cps and ppm?

Assignment/AgreementAssignment/Agreement

•What is the difference between What is the difference between input devices and output devices. input devices and output devices. Explain your answer by uploading Explain your answer by uploading photos of both devices. photos of both devices.

•See all the presentation posted See all the presentation posted on the School ICT Facebook walls.on the School ICT Facebook walls.