September 20th, 2016. Tuesday.
An output is the data that has been processed into a useful form. An output device is any type of hardware component that conveys information to one or more people.
What about a display device? A display device visually conveys text, graphics, and video information. A monitor however, is packaged as a separated peripheral. These may also be referred to as a LCD monitor or a widescreen.
A liquid crystal display (LCD) uses a liquid compound to present information on a display device. The quality of an LCD monitor or LCD screen depends primarily on :
- Resolution
- Response time
- Brightness
- Dot pitch
- Contrast ratio
The resolution of a display device it the number of horizontal and vertical pixels present in it. A higher resolution basically uses a greater number of pixels.
Plasma monitors are display devices that use gas plasma technology and offer screen sized up to 150 inches.
A CRT monitor is a desktop monitor that contains a cathode-ray tube. It has a much larger footprint compared to LCD monitors.
Printers
A printer produces text and graphics on a physical medium. Printed information is called a hard copy, or printout. There are two ways of printing, either in landscape or portrait orientation.
A non-impact printer forms character and graphics on a piece of paper without actually striking the paper. These types of printers includes ink-jet printers, photo printers, laser printers, thermal printers, mobile printers, and many more.
An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper. It can be printed in color or in black-and-white.
A photo printer produces color photo-lab-quality pictures. Software such as PictBridge allows you to print photos directly from a digital camera. Photo printers may also print from a memory card and preview photos on a built-in LCD screen. Most photo printer uses the ink-jet technology.
A multi-function peripheral (MFP) is a single device that prints, scans, copies, and in some cases, faxes. Sometime also known as an all-in-one device.
Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper. Impact printers may be categorized into two types, which is the dot-matrix printer and the line printer.
A dot-matrix printer produces printed images when tiny wire pins on a print head mechanism strike an inked ribbon.
A line printer prints an entire line at a time.
Speakers, Headphones, and Earbuds
An audio output device produces music, speech, or other sounds. Most computer users attach speakers to their computers to generate higher-quality sounds for playing games, to interact with multimedia presentations, listen to music, and to watch movies.
Headphones are speakers that cover or are placed outside of the ear. Whereas earbuds, rest inside the ear canal.
Voice output occurs when you hear a person's voice or when the computer talks to you through the speakers. Some web sites dedicate themselves to providing voice output.
Other Output Devices
Other output devices are available for specific uses and applications, such as data projectors, interactive whiteboards, force-feedback game controllers, and tactile output.
A data projector is a device that takes the text and images displaying on a computer screen and projects them on a larger screen. LCD projector and digital light processing (DLP) projector are examples of data projector.
An interactive whiteboard is a touch-sensitive device, resembling a dry-erase board, that displays the image on a connected computer screen.
No comments:
Post a Comment