Computer Output Module

the acronyms that describe a type computer monitor

-LCD (Liquid Crystal Display) -LED (Light emitting diode

output

-a spreadsheet printout -displaying a YouTube video on a TV screen -playing a song from spotify

characteristics of OLED technology

-capable of creating curved and extremely thin displays -currently more expensive to produce than LCD screens -use red, green, and blue LEDs to create each pixel -has the best possible contrast ratio -have the potential for making newspapers with video -costs approximately 5x more than competing display technologies

Plasma

-creates image using cells of ionized red, blue, and green gas -use cells of ionized gas to create images -becoming less popular -limited brightness may be a factor is a well-lit room

input

-entering text in a word processing program -recording a song using MIDI -putting a video from your phone onto your computer

select the characteristics of thermal printing

-paper turns black when heated -commonly used for printing receipts

output device

-projector -monitor -printer -speaker

LCD (liquid crystal display)

-refers to a type of monitor display -may have a relatively slow refresh rate sice it relies on molecular movement -because of their minimal power requirements, nearly all digital devices use liquid crystal displays -contrast ratio is not as great as competing technologies

ergonomics

-the study of human factors related to the things people use -can help improve mental concentration or improve physical capability by only providing necessary information to the user

inkjet printer

-uses ink cartridges -relatively low in initial cost -most common type of printer fro home use

laser printer

-uses toner cartridges -relatively high in initial cost

LED (light-emitting diode)

efficiently turn electrons in photons (light) and can provide very bright screens with very little energy

DPI (dots per inch)

the standard measure of printer quality

which of the following are true regarding high-definition displays

-typically have aspect ratios of 16:9 -typically have 1,080 horizontal lines of pixels

list the steps taken as a laser printer prints an image

1. laser 'removes' electrons from the drum 2. paper is fed between the drum and the toner 3. charged toner is attracted to the drum 4. toner is melted onto the paper

most digital devices use a ____________ port to attach peripherals

USB

contrast ratio

a description of the difference in the luminance of a display's white pixels compared to the black pixels

HDMI port

a port that allows the transfer of high quality video and audio signals

plotter

a type of printer that is used to print large graphic images such as architectural drawings by mechanically moving a pen over a large sheet of paper

projector

an output device that uses light to display video or image output on a surface

the number of bits of data describing each pixel in a display is referred to as ____________

color depth

frame rate

number of times per second a frame in a video is advanced

to convert sound waves into digital signals, each sound wave is __________

sampled

pixel

the smallest controllable

input device

-game controller -mouse -microphone -keyboard

additive manufacturing (AM)

AKA: 3D printing sprays successive layers of material to crate an object

the width of a screen compared to the height of a screen is referred to as ______________

aspect ratio

peripherals

printers, scanners, speakers, and external keyboards and other devices used with a computer

CPU (central processing unit)

refers to a computer's processor

the number of pixels in a display is called the display's _____________

resolution

the accuracy of a digital recording is determined by the device's _______________

sampling rate

optical media

such as DVDs and Blue-rays use reflective material that can be read by lasers to store data

Ultra HD

television displays with resolutions of at least 3840x260 pixels

screen size

the diagonal measure of the visible display

which of the following refer to ultra-high-definition television displays?

-8K UHD -4k UHD -Ultra HD

which of the following statements are true?

-DVDs and Blue-rays are considered optical media -DVDs use longer (red spectrum) lasers

printer manufacturers advertise the quality of their products by stating how many ____________ they produce

DPI (dots per inch)

ROM (read-only memory)

refers to a type of data storage

dot pitch

the distance between the center of 2 adjoining pixels on a display

refresh rate

the term that describes how fast each pixel in a display is refreshed or updated. the higher the refresh rate, the smoother the video