Output devices

What you know about Hardware?

1. Group members MUJAHID SHEIKH 75 HAMMAD MALIK 90 NASIR MEHMOOD 86 MIRZA YASEEN BAIG 67

2. Output devices

3. Introduction Computer is an electronic machine which takes input, process it and gets the output. so, Today we learn about output devices

4. Definition of output “Data that has been processed into useful form.” Or “The data that has been processed into a useful form is called OUTPUT.” Text Audio Video Graphics

5. Definition of output devices Any type of hardware component that conveys information to one or more people . ( Shelly & V ermaat) Output devices are hardware devices that display or present information to the user or other people. Output device lets a computer to communicate with you. The devices which are used to display the data to the user either in the form of hard copy or soft copy are called output devices.

6. Examples of out devices are Monitor Printer Speaker Headphone

7. Types of output

8. Hard copy output Produced on a paper or some material that can be touched and carried for being shown to others Permanent in nature and can be kept in paper files or can be looked at a later time when the person is not using the computer The output printed on paper is called Hard Copy Output.

9. soft copy output A soft copy is the unprinted digital document file. It can usually be viewed through an appropriate editing program. such as word processing programs, database programs, or presentation software, depending on the file type. The output shown on display screen is called Soft Copy Output.

10. Types of output devices Display devices Printers Speakers ,head phone ,ear buds Other output devices

11. Display devices Television CRT (Cathode Ray Tube) Monitor LCD technology TFT LCD (Thin Film Transistor Liquid Crystal Display) Flat-panel displays Gas plasma

12. television A device with a screen for receiving television signals.

13. CRT (CATHODE RAY TUBE) CRT (CATHODE RAY TUBE) It is basically a vacuum tube with an electron gun and a fluorescent screen. A coating of red, green and blue are used to form images in the form of light emitted from the fluorescent screen.

14. MONITOR The monitor is a visual display device to present output information in the form of text, graphics, or video on the monitor screen There are two kinds of monitor; the flat panel or LCD (Liquid Crystal Display) monitor and the older CRT(Cathode Ray Tube) models.

15. LCD technology LCD (liquid crystal display) is the technology used for displays in notebook and other smaller computers. Like light-emitting diode ( LED ) and gas-plasma technologies, LCDs allow displays to be much thinner than cathode ray tube ( CRT ) technology.

16. TFT LCD (THIN FILM TRANSISTOR LIQUID CRYSTAL DISPLAY) TFT LCD (THIN FILM TRANSISTOR LIQUID CRYSTAL DISPLAY) LCDs are thin, flat display device made of color pixels arrayed in front of a light source (backlight) or reflector. The advantage of LCD monitors is less space, low power and low

17. gas Plasma display A type of thin  display screen , called a  flat-panel display , used in some older  portable computers . A gas-plasma display works by sandwiching neon gas between two plates. Each plate is coated with a conductive print.

18. Printers An output device that produces text and graphics on a physical medium such as paper or transparency film. Hard copy (printout ) Softcopy (monitor) Portrait vs. landscape Printing requirements vary

19. Types of Printers Non_ impact printer Ink jet printer LASER PRINTER THERMAL PRINTERS MOBILE PRINTERS PLOTTER & LARGE FORMAT PRINTERS Photo printer IMPACT PRINTER

20. Non-impact Printers No mechanism strikes the paper Spray tiny drops of ink onto the paper Both black-and-white and colour Resolution measured in dots per inch (dpi) Speed measured in pages per minute (ppm) Nozzles spray ink Much quieter than impact printers Ink-jet printers

21. Inkjet printer An ink-jet printer is a type of nonimpact printer that forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper. Ink-jet printers have become a popular type of color printer for use in the home.

22. How Inkjet printer works?

23. Mobile PRINTER Mobile Printer are much Smaller, lightweight printer that allows a mobile user to print from a laptop, mobiles or handheld computer while travelling.

24. Laser printers Non-impact printer High-speed , high-quality Very high quality resolution - 300dpi to 1,200 dpi Stores entire page before printing it Postscript Operates much like a copy machine Toner Replace cartridge

25. Dot matrix printers Small dots form characters Continuous form paper More pins on print head means higher quality Speed measured in characters per second (cps)

26. Thermal printers Pushes electrically heated pins against heat-sensitive paper Thermal transfer printer Print head heats and melts the ink of the ink ribbon to print the dot-composed character on normal paper

27. Plotters and Large-Format Printers Used for high-quality drawings such as blueprints, maps, circuit diagrams, and signs Plotters Pen plotters Electrostatic plotters Large-format printer Photo-realistic quality color prints

28. Impact Printers Printing mechanism strikes paper, ribbon and character together Near letter quality (NLQ) Used for multipart forms strikes through multiple layers of paper

29. Whenever You want to buy a printer ! What is my budget? How fast must my printer print? Do I need a color printer? What is the cost per page for printing? Will I print graphics? What sizes of paper does the printer accept? How much do I print? Will the printer be connected to a network?

30. Audio output devices Produce music, speech, or other sounds Sound card Headsets

31. Audio output devices Speakers Stereo speakers and woofer Headphones and Earbuds

32. VOICE RESPONSE SYSTEM Voice response system enables a computer to talk to a user • Has an audio-response device that produces audio output Such systems are of two types :– Voice reproduction systems Speech synthesizers

33. VOICE REPRODUCTION SYSTEM Produce audio output by selecting an appropriate audio output from a set of pre-recorded audio responses Applications include audio help for guiding how to operate a system, automatic answering machines, video games, etc.

34. SPEECH SYNTHESIZER Converts text information into spoken sentences Used for applications such as: – Reading out text information to blind persons Allowing those persons who cannot speak to communicate effectively Translating an entered text into spoken words in a selected language

35. Assistive Technology Input and Output Users with limited hand movement can use a head-mounted pointer to control the pointer or insertion point. The switch might be a hand pad, a foot pedal, a receptor that detects facial motions, or a pneumatic instrument controlled by puffs of air.

36. Other output devices DATA PROJECTORS ITERACTIVE WHITE BOARDS FORCE FEED BACK GAME CONTROLLER

37. Projectors Projector is a device that takes the text and images displaying on a computer or mobile Device screen and projects the images on a larger screen so that an audience can see the image clearly D ata projectors

38. Interactive Whiteboards An interactive whiteboard is a touch-sensitive device , resembling a dry-erase board, that displays the image on a connected computer screen, usually via a projector . A presenter controls the program by clicking a remote control, touching the whiteboard, drawing on erasing the whiteboard with a special digital pen

39. Joysticks , wheels, gamepads, and motion-sensing game controllers are input devices used to control movements and actions of a player or object in computer games, simulations, and video games. Joysticks, wheels, gamepads

40. conclusion Without output devices the user cannot experience the image ,sound, color & visibility of the data. Any device that  outputs  information from a computer is called an output device. Since information from a computer is output in either a visual or auditory format. The most common output devices are the  monitor  and speakers. These two devices provide instant feedback to the user's  input , playlist. While monitors and speakers are the most common output devices, there are many others. Some examples include headphones, printers, projectors, lighting control systems, audio recording devices, and robotic machines. A computer without an output device connected to it is pretty useless.