Introduction to Computer - Output Devices.pptx
- 1. CSCA0101 Computing Basics Output Devices 1
- 2. CSCA0101 Computing Basics Output Devices Topics: • Output Devices • Examples of Output Device • Printer • Monitor • Speakers • Projector 2
- 3. CSCA0101 Computing Basics Output Devices Output Devices • Any peripheral that receives or displays output from a computer. • Computer hardware equipment used to communicate the results of data processing carried out by a computer to the outside world. 3
- 4. CSCA0101 Computing Basics Output Devices Examples of Output Device • Monitor • Printer • Speakers • Projector 4
- 5. CSCA0101 Computing Basics Output Devices Monitor • The device which displays computer output. • The monitor displays the video and graphics information generated by the computer through the video card. • Monitors are very similar to televisions but usually display information at a much higher resolution. 5
- 6. CSCA0101 Computing Basics Output Devices Monitor Monochrome Monitor • A monochrome monitor is a type of CRT computer display which was very common in the early days of computing, from the 1960s through the 1980s, before color monitors became popular. • They are still widely used in applications such as computerized cash register systems 6
- 7. CSCA0101 Computing Basics Output Devices Monitor Monochrome Monitor • Monochrome monitors actually display two colors, one for the background and one for the foreground. • The colors can be black and white, green and black, or amber and black. 7
- 8. CSCA0101 Computing Basics Output Devices Monitor Color Monitor • Color monitors can display anywhere from 16 to over 1 million different colors. • Color monitors are sometimes called RGB monitors because they accept three separate signals -- red, green, and blue. 8
- 9. CSCA0101 Computing Basics Output Devices Types of Monitor • Cathode Ray Tube (CRT) • Liquid Crystal Display (LCD) • Light-emitting Diode (LED) 9
- 10. CSCA0101 Computing Basics Output Devices 10 Types of Monitor Cathode Ray Tube (CRT) • Large • Heavy • Produce heat • Not expensive
- 11. CSCA0101 Computing Basics Output Devices 11 Types of Monitor Liquid Crystal Display (LCD) • Less space • Lighter • Low power consumption • Expensive • Limited viewing angle
- 12. CSCA0101 Computing Basics Output Devices 12 Types of Monitor Light-emitting Diode (LED) • Less space • Lighter • Very expensive • Provide higher contrast and better viewing angles than LCD monitor
- 13. CSCA0101 Computing Basics Output Devices 13 Speakers • A hardware device connected to a computer's sound card that outputs sounds generated by the computer. • Speakers can be used for various sounds meant to alert the user, as well as music and spoken text
- 14. CSCA0101 Computing Basics Output Devices 14 Headphones • Headphones give sound output from the computer. • They are similar to speakers, except they are worn on the ears so only one person can hear the output at a time.
- 15. CSCA0101 Computing Basics Output Devices 15 Projector • An output device that can take the display of a computer screen and project a large version of it onto a flat surface. • Projectors are often used in meetings and presentations so that everyone in the room can view the presentation.
- 16. CSCA0101 Computing Basics Output Devices 16 Printer • Printer is an external hardware device responsible for taking computer data and generating a hard copy of that data. • Printers are one of the most used peripherals on computers and are commonly used to print text, images, and photos.
- 17. CSCA0101 Computing Basics Output Devices 17 Types of Printer Printers can be categorized into: • Impact Printer • Non-Impact Printer
- 18. CSCA0101 Computing Basics Output Devices 18 Impact Printer • It strikes paper and ribbon together to form a character, like a typewriter. Advantages Disadvantages • Less expensive • Noisy • Print quality lower in some types • Poor graphics or none at all • Slow
- 19. CSCA0101 Computing Basics Output Devices 19 Impact Printer Daisy-wheel • Similar to a ball-head typewriter, this type of printer has a plastic or metal wheel on which the shape of each character stands out in relief. • A hammer presses the wheel against a ribbon, which in turn makes an ink stain in the shape of the character on the paper. • Daisy-wheel printers produce letter-quality print but cannot print graphics.
- 20. CSCA0101 Computing Basics Output Devices 20 Impact Printer Daisy-wheel
- 21. CSCA0101 Computing Basics Output Devices 21 Impact Printer Dot-Matrix • Creates characters by striking pins against an ink ribbon. • Each pin makes a dot, and combinations of dots form characters and illustrations.
- 22. CSCA0101 Computing Basics Output Devices 22 Impact Printer Dot-Matrix
- 23. CSCA0101 Computing Basics Output Devices 23 Non-Impact Printer • It uses ink spray, toner powder or inkless Advantages Disadvantages • Quiet • Can handle graphics and often a wider variety of fonts than impact printers • Fast • More expensive • Occupies a lot of space • The cost of maintaining it is high
- 24. CSCA0101 Computing Basics Output Devices 24 Non-Impact Printer Laser Printer (Toner-based) • A laser printer rapidly produces high quality text and graphics. • Laser printers are often used in corporate, school, and other environments that require print jobs to be completed quickly and in large quantities.
- 25. CSCA0101 Computing Basics Output Devices 25 Non-Impact Printer Multifunction Printer (Toner-based) • An MFP is an office machine which incorporates the functionality of multiple devices in one. • A typical MFP may act as a combination of some or all of the following devices: – Printer – Scanner – Photocopier – Fax
- 26. CSCA0101 Computing Basics Output Devices 26 Non-Impact Printer Ink-jet Printer • Inkjet printer operates by propelling variably-sized droplets of liquid or molten material (ink) onto almost any sized page. • They are the most common type of computer printer used by consumers.
- 27. CSCA0101 Computing Basics Output Devices 27 Non-Impact Printer Thermal Printer (Inkless) • Thermal printers work by selectively heating regions of special heat- sensitive paper. • These printers are commonly used in calculators and fax machines; and although they are inexpensive and print relatively fast, they produce low resolution print jobs.
- 28. CSCA0101 Computing Basics Output Devices 28 Plotter • The plotter is a computer printer for printing vector graphics • Plotters are used in applications such as computer- aided design such as diagrams, layouts, specification sheets and banners • The plotter is capable of producing color drawings in a matter of minutes • Plotters differ from printers in that they draw lines using a pen • Plotters are considerably more expensive than printers
- 29. CSCA0101 Computing Basics Output Devices 29 Plotter