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| CRT | Abbreviation of cathode-ray tube, the technology used in most televisions and computer display screens. A CRT works by moving an electron beam back and forth across the back of the screen. Each time the beam makes a pass across the screen, it lights up phosphor dots on the inside of the glass tube, thereby illuminating the active portions of the screen. By drawing many such lines from the top to the bottom of the screen, it creates an entire screenful of images. |
| Interlaced | Refers to monitors and video standards that use interlacing techniques to improve resolution. Although interlacing increases resolution, it also increases screen flicker and reduces reaction time |
| Non-Interlaced | Refers to monitors and video standards that do not use interlacing techniques to improve resolution. Although interlacing increases resolution, it also increases screen flicker and reduces reaction time |
| Degauss | To remove magnetism from a device. The term is usually used in reference to color monitors and other display devices that use a Cathode Ray Tube (CRT). These devices aim electrons onto the display screen by creating magnetic fields inside the CRT. External magnetic forces -- such as the earth's natural magnetism or a magnet placed close to the monitor -- can magnetize the shadow mask, causing distorted images and colors. |
| FRU | Field Replacement Unit term used in referenced to laser printers and refers to printer components that can be replaced as part of maintenence procedures. |
| Corona Wire | A wire that is a method of applying a uniform negative charge to the surface. |
| Fuser | the part of the laser printer that uses intense heat to fuse the ink on the printing medium (paper). |
| Pixel | Short for Picture Element, a pixel is a single point in a graphic image. Graphics monitors display pictures by dividing the display screen into thousands (or millions) of pixels, arranged in rows and columns. The pixels are so close together that they appear connected |
| Centronics Interface | A standard interface for connecting printers and other parallel devices. Although Centronics Corporation designed the original standard, the Centronics interface used by modern computers was designed by Epson Corporation. For PCs, almost all parallel ports conform to the Centronics standard. Two new parallel port standards that are backward compatible with Centronics, but offer faster transmission rates, are ECP (Extend Capabilities Port) and EPP (Enhanced Parallel Port). |
| Resolution | Refers to the sharpness and clarity of an image. The term is most often used to describe monitors, printers, and bit-mapped graphic images. In the case of dot-matrix and laser printers, the resolution indicates the number of dots per inch. For example, a 300-dpi (dots per inch) printer is one that is capable of printing 300 distinct dots in a line 1 inch long. This means it can print 90,000 dots per square inch. |
| Refresh Rate | Similarly, display monitors must be refreshed many times per second. The refresh rate for a monitor is measured in hertz (Hz) and is also called the vertical frequency, vertical scan rate, frame rate or vertical refresh rate. The old standard for monitor refresh rates was 60Hz, but a new standard developed by VESA sets the refresh rate at 75Hz for monitors displaying resolutions of 640x480 or greater. This means that the monitor redraws the display 75 times per second. The faster the refresh rate, the less the monitor flickers. |
| WYSIWYG | Its an application that lets you see on the display screen exactly what will apear when document is printed |
| EPP | Short for Enhanced Parallel Port, a parallel port standard for PCs that supports bi-directional communication between the PC and attached non-printer devices. EPP is about 10 times faster than the older Centronics standard |
| ECP | Short for Extended Capabilities Port, a parallel-port standard for PCs that supports bi-directional communication between the PC and attached devices (such as a printer). ECP is about 10 times faster than the older Centronics standard. |
| Electrostatic Photographic Drum | Describes the type of drum used in laser printers. these drums depend on electrostatic charges to hold the toner that is moved over to the paper during the transfer step. |
