Terms 1Terms 1

VGAVGA

VGAVGA - Short for - Short for Video Graphics Array, Video Graphics Array, VGAVGA is a popular display standard is a popular display standard developed by developed by IBMIBM and introduced in 1987 and introduced in 1987 VGA provides 640 x 480 VGA provides 640 x 480 resolutionresolution color color display screens with a display screens with a refreshrefresh rate of 60 rate of 60HzHz and 16 colors displayed at a time. If the and 16 colors displayed at a time. If the resolution is lowered to 320 x 200, 256 resolution is lowered to 320 x 200, 256 colors can be displayed VGA capability is colors can be displayed VGA capability is built into plug -in video cards, VGA chips, built into plug -in video cards, VGA chips, and monitors that can work with the VGA and monitors that can work with the VGA cards. Today VGA has been replaced by cards. Today VGA has been replaced by SVGA.SVGA.

SVGASVGA

SSuper uper VVideo ideo GGraphics raphics AArray or rray or SSuper uper VVector ector GGraphics raphics AAdapter (dapter (PCPC monitor monitor display standard that allows display standard that allows resolution above 640 by 480 resolution above 640 by 480 pixelspixels and up to 16.2 million colors).and up to 16.2 million colors).This is the type of connector you will find for most typical This is the type of connector you will find for most typical PC monitors and some LCD screensPC monitors and some LCD screens

VGA / SVGAVGA / SVGA

This is a S/VGA port.

This is a S/VGA connector.

DVIDVI

Short for Short for Digital Visual InterfaceDigital Visual Interface, , DVIDVI is a digital connection used to is a digital connection used to connect devices such as connect devices such as projectors, TVs, etc.projectors, TVs, etc.This is the type of connector you will find This is the type of connector you will find on modern Mac monitors, high-end LCDs, on modern Mac monitors, high-end LCDs, and HDTVs and HDTVs

CRTCRTCathode Ray TubeCathode Ray TubeA vacuum tube in which a hot cathode emits a A vacuum tube in which a hot cathode emits a beam of electrons that pass through a high beam of electrons that pass through a high voltage anode and are focused or deflected voltage anode and are focused or deflected before hitting a phosphorescent screen.before hitting a phosphorescent screen.A vacuum tube in which a hot negatively A vacuum tube in which a hot negatively charged electrode (the source of electrons) charged electrode (the source of electrons) emits a beam of electrons that pass through a emits a beam of electrons that pass through a high voltage positively charged electrode (by high voltage positively charged electrode (by which electrons leave) and are focused orwhich electrons leave) and are focused ordeflected before hitting a lighted screen. deflected before hitting a lighted screen.

LCDLCDLiquid Crystal DisplayLiquid Crystal Display

A digital display that uses liquid crystal A digital display that uses liquid crystal cells that change reflectivity in an applied cells that change reflectivity in an applied electric field; used for portable computer electric field; used for portable computer displays and watches phosphorescent displays and watches phosphorescent etc.etc.

A digital display screen that uses liquid A digital display screen that uses liquid crystal to define the color contrastcrystal to define the color contrastfor better visibility. for better visibility.

LEDLEDLEDs are special diodes that emit light LEDs are special diodes that emit light when connected in a circuit. They are when connected in a circuit. They are frequently used as "pilot" lights in frequently used as "pilot" lights in electronic appliances to indicate electronic appliances to indicate whether the circuit is closed or not.whether the circuit is closed or not.Traditional bulbs control current with heated filaments. Traditional bulbs control current with heated filaments. LEDs are a solid-state device and do not use filaments. LEDs are a solid-state device and do not use filaments. This makes LEDs very reliable with a long lifespan This makes LEDs very reliable with a long lifespan (typically 100,000 hours). LEDs have low power (typically 100,000 hours). LEDs have low power consumption and low heat output making them an ideal consumption and low heat output making them an ideal replacement for traditional bulbs. LEDs can be dimmed. replacement for traditional bulbs. LEDs can be dimmed.

OLEDOLED

Organic light emitting diode (OLED) technology Organic light emitting diode (OLED) technology uses substances that emit red, green, blue or uses substances that emit red, green, blue or white light. Without any other source of white light. Without any other source of illumination, OLED materials present bright, illumination, OLED materials present bright, clear video and images that are easy to see at clear video and images that are easy to see at almost any angle. almost any angle. Prior to standardization, OLED technology was also referred to as OEL or Organic Prior to standardization, OLED technology was also referred to as OEL or Organic Electro-Luminescence. One of the great benefits of an OLED display over the Electro-Luminescence. One of the great benefits of an OLED display over the traditional LCD displays found in computer displays is that OLED displays don't traditional LCD displays found in computer displays is that OLED displays don't require a backlight to function. This means that they draw far less power and they can require a backlight to function. This means that they draw far less power and they can be used with small portable devices which have mostly been using monochrome low-be used with small portable devices which have mostly been using monochrome low-resolution displays to conserve power. This will also mean that they will be able to resolution displays to conserve power. This will also mean that they will be able to last for long periods of time with the same amount of battery charge. last for long periods of time with the same amount of battery charge.

JaggiesJaggies

The stair-stepped or star like appearance of The stair-stepped or star like appearance of diagonal lines where there should be smooth diagonal lines where there should be smooth lines.  This is caused in output devices, such as lines.  This is caused in output devices, such as the monitor and printer, when there are not the monitor and printer, when there are not enough pixels in the image or on screen to enough pixels in the image or on screen to represent them realistically, or not enough represent them realistically, or not enough resolution. Jaggies often occur when a bit-resolution. Jaggies often occur when a bit-mapped image is converted to a different mapped image is converted to a different resolution. resolution. Also called "stair-stepping" and "aliasing".Also called "stair-stepping" and "aliasing".

Anti-aliasingAnti-aliasing

A software program that rids a computer of A software program that rids a computer of jaggies by smoothing the jagged appearance of jaggies by smoothing the jagged appearance of diagonal lines in a bitmapped image. The pixels diagonal lines in a bitmapped image. The pixels that surround the edges of the line are changed that surround the edges of the line are changed to varying shades of gray or color in order to to varying shades of gray or color in order to blend the sharp edge into the background. blend the sharp edge into the background.

This technique is also called "dithering," but is This technique is also called "dithering," but is usually known as anti-aliasing when applied to usually known as anti-aliasing when applied to diagonal and curved lines. diagonal and curved lines.