Supporting Display Devices Flashcards
Aspect Ratio
A characteristic of display devices that indicates the ratio of width to height.
CCFL (Cold Cathode Fluorescent Lamp)
A light source that uses electrodes and mercury vapour to create ultraviolet light.
Chain of Custody
The record of history from collection, to presentation in court, to disposal.
Composite Video
The format of an analogue (picture only) signal before it is combined with a sound signal and modulated onto a radio frequency carrier.
Dead Pixels
Pixels that do not display light as expected and will show up as small black dots.
Display Device
A personal computer component that enables users to view the text and graphical data output from a computer.
DisplayPort
A digital display standard that aims to replace DVI and VGA standards.
Hertz
A unit of measurement that indicates cycles or occurrences per second.
LCD (Liquid Crystal Display)
A type of flat-panel display that uses Cold Cathode Fluorescent Lamps as the source of backlight and that comes in large-screen sizes of 17 inches and more, with high screen resolution and high colour depth.
Lumen
The unit of measurement for visible light that is emitted from a light source.
Mini-HDMI (Mini High-Definition Multimedia Interface)
A smaller version of the full size HDMI connector, except that it is specified for use with portable devices.
Native Resolution
The fixed resolution for LCD or other flat panel display devices.
Pixel
The smallest discrete element on a display. A single pixel is composed of a red, a blue and a green dot.
Plasma Display
A type of flat panel that uses a gas mixture placed between two sheets of glass that have electrodes attached to their surfaces.
RCA (Radio Corporation of America)
A cable and connector that is used to carry audio and video transmissions to and from a variety of devices such as TVs, digital cameras and gaming systems.
Refresh Rate (Frame Rate)
The number of times per second that the monitor is “refreshed”, or scanned to illuminate the pixels.
Resolution
The number of pixels that make up the dimension of a display, represented in a ratio value as the number of horizontal pixels by vertical pixels.
S-Video
An analogue video signal that carries the video data as two separate signals (brightness and colour). S-Video works in 480i or 576i resolution.
Stuck Pixels
Pixels that only show one colour of light, so they appear out of place when the display is on.
TN (Twisted Nematic)
An LCD panel technology where the panel is black when no electric current is running through the liquid crystal cells because the cells align themselves in a twisted state. When an electric current is applied, the liquid crystals untwist, allowing light to pass through, resulting in a white display screen.
Visual Artifact
An error or anomaly in the visual display of a picture.
