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Output Devices
Presented to: Md. Samiullah, Lecturer, CSE, DU
Presented by: Sakline Zubair Sifat (2014-2-10-174) &Mahadi Hasan Rume (2013-10-225)
Flow of contentsIntroduction to Output device
List of some output device
Describe about them
Conclusion
Introduction to Output device
• Electronic or electromechanical equipment connected to a computer and used to transfer data out of the computer in the form of text, images, sounds, or other media
• A system that provides the user with visual, tactile or auditory feedback
• Translate the data processed by the computer into a format that people can understand , appreciate and work with(E.g. in vedio, text, image
List of some Output devices
Monitor
Printer
Speaker
MonitorMonitor is an output device that visually conveys text, graphics, and video information. Information shown on a display
device is called soft copy because the information exists electronically and is displayed for a temporary period of time
Monitor 2/4
Generally there are tow types of monitor.
1. CRT (Cathode ray tube) &
2. Flat-panel display.
Like:LCD, LED etc
Monitor 3/4•Electron gun shoots streams of electrons at a high voltage towards the screen
•Magnetic coil controls the flow of electrons
•Phosphor dots on the back of the screen glow when the electron beam hit them
•Electron gun do not scan it randomly but in a designed fashion
•The electron gun scans from left to right
•Then from top to bottom
•Refreshing every phosphor dot in a zigzag pattern
Mechanism
Monitor 4/4 Mechanism : Scanning
left right
top
bottom
Indicates pixel
PrinterThe printer is a device that print text document and images on paper
It is a peripheral output device. Printers can be classified in two group-impact printers and non-impact printers
Printer 2/3There are different types of printers.
1. Dot-Matrix.
2. Inkjet
3.Laser Printer
Printer 3/3•Dot-Matrix PrinterDot-Matrix printers are character printer that print one character and all kind of images as patterns of dots.
•InkjetInk jet printers are character printers that form characters and all kinds of images by spraying small drops of ink on a paper.
•Laser PrinterThe Laser Printer uses a beam of leaser for the purpose of printing and it is consists of a revolving cylinder that is made up of photoconductive material
SpeakerA speaker system converts an electrical signal to sound.
Speaker 2/3More about speaker
Speaker is well known output device usually outputs sound
It is attached with the sound card of the computer
Sound can be controlled by controller
Electric signal is converted and it changes the air pressure outside which we call sound
Speaker 3/3Speakers are connected directly to a computer, its uses are:
Used to output sound from multimedia presentetions
Used in home entertainment centers
Can help blind people
Play downloud sound files
Tip: Keep in mind that drives such as a CD-ROM, DVD, and a Floppy
diskette drive may be capable of sending the computer information, but they
are not output devices. These are considered storage devices.
Without output devices the user cannot experience the image ,sound, color & visibility of the data.
Thanks for your Patience
CSE-101, Sec-09(FALL 2014)
