![]() Most screens are capable of displaying 80 characters of data horizontally and 25 lines vertically. The screen can be divided into a series of character boxes - fixed location on the screen where a standard character can be placed. It takes more than one illuminated pixel to form a whole character, such as the letter ‘e’ in the word help.Ī finite number of characters can be displayed on a screen at once. The smaller the pixels, the better the image clarity or resolution. The CRT display is made up of small picture elements called pixels. There are two kinds of viewing screen used for monitors. The sharpness of the image depends upon the number of pixels. It forms images from tiny dots, called pixels that are arranged in a rectangular form. Monitors, commonly called as Visual Display Unit (VDU), are the main output device of a computer. Following are some of the important output devices used in a computer.
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