Input Devices and Output Devices also Monitor characterists

universal product code

(UPC) bar codes.

LED

A light-emitting diode (LED) display is an LCD display that uses LED backlighting to light the display. LED has lower power consumption than standard LCD backlighting, allows the panel to be thinner, lighter, brighter, and display better contrast.

OLED

An organic LED display uses a layer of organic material that responds to electrical stimulus to emit light. This process allows each pixel to light individually, resulting in much deeper black levels than LED. OLED displays are also thinner and lighter than LED displays.

Aspect ratio

Aspect ratio is the horizontal to vertical measurement of the viewing area of a monitor.

DLP

Digital Light Processing (DLP) is another technology used in projectors. DLP projectors use a spinning color wheel with a microprocessor-controlled array of mirrors called a digital micromirror device (DMD).

Dot pitch

Dot pitch is the distance bethttp://quizlet.com/26152929/editween pixels on the screen. A lower dot pitch number produces a better image.

Brightness

Intensity of the image

Interlace/Non-Interlace

Interlaced monitors create the image by scanning the screen two times. The first scan covers the odd lines, top to bottom, and the second scan covers the even lines. Non-interlaced monitors create the image by scanning the screen, one line at a time from top to bottom. Most CRT monitors today are non-interlaced.

LCD

Liquid crystal display (LCD) is commonly used in flat panel monitors, laptops, and some projectors. It consists of two polarizing filters with a liquid crystal solution between them. An electronic current aligns the crystals so that light can either pass through or not pass through.

examples of output devices:

Monitors and projectors Printers and fax machines Speakers and headphones

examples of input devices:

Mouse and keyboard Gamepad and joystick Digital camera and digital video camera Biometric authentication device Touch screen Digitizer Scanner

Native resolution

Native resolution is the number of pixels that a monitor has. A monitor with a resolution of 1280x1024 has 1280 horizontal pixels and 1024 vertical pixels. Native mode is when the image sent to the monitor matches the native resolution of the monitor.

Passive matrix

Pa` is less expensive than active matrix but does not provide the same level of image control.

Plasma

Plasma displays are another type of flat panel monitor that can achieve high levels of brightness, deep black levels, and a very wide range of colors.

Contrast

Ratio of light to dark

Reset

Returns the monitor settings to factory settings

Active matrix is sometimes called thin film transistor

TFT allows each pixel to be controlled, which creates vhttp://quizlet.com/26152929/editery sharp color images.

CRT

The cathode-ray tube (CRT) has three electron beams. Each beam is directed at colored phosphor dots on the screen that glow red, blue, or green when struck by the beam. Areas not struck by an electron beam do not glow. The combination of glowing and non-glowing areas creates the image on the screen. Some televisions use this technology. CRTs usually have a degauss button on the front that the user can press to remove discoloration caused by magnetic interference.

Horizontal, vertical, and color resolution

The number of pixels in a line is the horizontal resolution. The number of lines in a screen is the vertical resolution. The number of colors that can be reproduced is the color resolution.

Refresh rate

The refresh rate is how often per second the image is rebuilt. A higher refresh rate produces a better image and reduces the level of flicker.

Pixel

The term pixel is an abbreviation for picture element. Pixels are the tiny dots that comprise a screen. Each pixel consists of red, green, and blue.

Position

Vertical and horizontal location of the image on the screen

Contrast ratio

\ is a measurement of the difference in intensity of light between the brightest point (white) and the darkest point (black). A 10,000:1 contrast ratio shows dimmer whites and lighter blacks than a monitor with a contrast ratio of 1,000,000:1.

A keyboard, video, mouse (KVM) switch

is a hardware device that can be used to control more than one computer while using a single keyboard, monitor, and mouse.

The mouse

is used to navigate the graphical user interface (GUI)