Output Devices-Types of Output Devices

Output Devices
Output Device:
An output device is a peripheral device that enable us to view or hear the computer’s processed data.
It takes processed results from the processor and presents useful information to the user in human understandable form.
Types of Output Devices:
Monitors
Printers
Plotter
Audio Output : Sound card and speakers

Cathode-ray tube (CRT)
Resemble televisions
Use picture tube technology
Less expensive than a LCD monitor
Take up more desk space and use more energy than LCD monitors
Passive-matrix LCD
Active-matrix LCD
Gas plasma display
Field emission display
Types of Non - Impact Printers:

Laser Printers
Ink - jet printers

1. BCA ICIT (20107) RITIKA KAPOOR ASSISTANT PROFESSOR

2. Output Devices Output Device: An  output device  is a peripheral device that enable us to view or hear the computer’s processed data. It takes processed results from the processor and presents useful information to the user in human understandable form.

3. Output Devices Types of Output Devices: Monitors Printers Plotter Audio Output : Sound card and speakers

4. Output Devices Monitors A monitor is a peripheral device which displays computer output on a screen. Screen output is referred to as soft copy . Types of monitors: Cathode-ray tube (CRT) Liquid Crystal Display (LCD or flat-panel)

5. Cathode-ray tube (CRT) Resemble televisions Use picture tube technology Less expensive than a LCD monitor Take up more desk space and use more energy than LCD monitors

6. Liquid Crystal Display (LCD) Cells sandwiched between two transparent layers form images Used for notebook computers, PDAs, cellular phones, and personal computers More expensive than a CRT monitor Take up less desk space and use less energy than CRT monitors Types of LCD monitors: Passive-matrix LCD Active-matrix LCD Gas plasma display Field emission display

7. Output devices Printers A printer is a peripheral device that produces a physical copy or hard copy of the computer’s output. Types of Printers: Impact Printers Non – Impact Printers

8. Types of Printers Impact Printers There is some physical contact with the paper to produce the image ie physically striking the paper Types of Impact Printers: Line printers Dot matrix printers

9. Impact Printers Line printers Used by mainframes for jobs that need a large volume of printing Limited characters available Print an entire line at a time Cheap to run Not high quality

10. Impact Printers Dot Matrix Printer Have a print head made up of columns of pins The pins form characters and images as patterns of dots produced when the pins strike the paper Reasonable quality text and graphics Inexpensive to buy and run Noisy

11. Types of Printers Inkjet printer , also called a bubble-jet , makes characters by inserting dots of ink onto paper Letter-quality printouts Cost of printer is inexpensive but ink is costly

12. Non-Impact Printers Types of Non - Impact Printers: Laser Printers Ink - jet printers

13. Non – Impact Printers Laser printer works like a copier Quality determined by dots per inch (dpi) produced Color printers available Expensive initial costs but cheaper to operate per page

14. Non – Impact Printers Ink-jet Printers Dots of ink are sprayed onto the paper to form the image Reasonably high quality Available in colour or B/W Speed measured in pages per minute Reasonably priced Expensive to run

15. Output Devices Plotter A plotter is a printer that uses a pen that moves over a large revolving sheet of paper. It is used in engineering, drafting, map making, and seismology.

16. Output Devices Audio Output: Sound Cards and Speakers Audio output is the ability of the computer to output sound. Two components are needed: Sound card – Plays contents of digitized recordings Speakers – Attach to sound card

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