Example:
1. Display devices
2. Printers
3. Speakers, headphone
4. Data projectors
5. Interactive whiteboards
A display device 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. Display devices include CRT monitor Plasma monitors, LCD monitors and displays, plasma monitors, HDTV and televisions.
LCD defined as Liquid crystal display , it uses a liquid compound to present information on a display device. The quality of an LCD monitor depends primarily on Resolution , Response time , Brightness, Dot pitch , Contrast ratio . Resolution is the number of vertical and horizontal pixels in a display device . A higher resolution use more number of pixels .
The graphics processing unit (GPU) controls the manipulation and display of graphics on a display device.
LCD monitors use a digital signal and should plug into a DVI port, an HDMI port, or a Display port.
Plasma monitors are display devices that use gas plasma technology and offer screen sizes up to 150 inches.
Televisions also are a good output device.Require a convert if you are connecting your computer to an analog television.
Digital television (DTV) offers a crisper, higher-quality output.
A CRT monitor is a desktop monitor that contains a cathode-ray tube.
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Printers
Printer produce tex and graphic on a paper , Printed information is called a print out . Landscape or portrait orientation.
A non-impact printer forms characters and graphics on a piece of paper without actually striking the paper. ( ink-jet printers , Photo printers , Laser printers , thermal printers , mobile printer Impact printers dot-matrix printe , line printer )
ink-jet printers
forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper.
Color or black and white
Printers with a higher dpi (dots per inch) produce a higher quality output.
Photo printers
produces color photo-lab-quality pictures
Most use ink -jet technology
Picture Bridge allows you to prit photos directly from a digital camera.
Printers with a higher dpi ( dots per inch ) produce a higher quality output.
Laser printers
High speed
Black and white
High quality
Color
Thermal printers
Generates images by pushing electrically heated pins against the heat sensitive paper.
Thermal wax-transfer printer
Dye-sublimation printer
Mobile printers
A small , lightweight, battery-powered printer that allows a mobile user to print form a notebook computer, smart phone, or other mobile device.
Label and postage printers
A label printer is a small printer that prints on adhensive-type material.
A postage printer prints postage stamps
Postage also can printed on other types of printers.
Plotters are used to produce high quality drawings.
Large format printers are used to create photo-realistic quality color prints on a larger scale.
Impact printer form characters and graphics on a piece of paper by striking and leaving mark on paper.
Example :
Dot-matrix printer and Line printer
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Speakers, Headphones and Earbuds
An audio output device that produces sound. Example :
1. Speaker- An electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance.
2. Headphones- speaker that cover the ear.
3. Earbuds- rest inside ear canal.
Data projector is a device that takes text and images displaying on computer screen and projects them on a larger screen. Example :
1.LCD projector.
2.Digital light processing (DLP) projector.
Interactive white board is a touch sensitive device, resembling a dry-erase board that displays the image on a connected computer screen.
Force feedback game controller send resistance to the device in response to actions of the user.
Tactile output provides a user with physical response from the device.
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