Chapter 4 Flashcards
The primary method of getting information out of a computer is to use what. pg-198
Computer video display unit (VDU)
(CRT) Stands for what. pg-198
Cathode Ray Tube
(LCD) Stands for what. pg-198
Liquid Crystal Display
The different VDU types: pg-199
CRT Liquid crystal display LED display Plasma OLED Projection systems
Shoots a beam of electrons toward the back side of the monitor screen. pg-199
Electron gun
The back of the screen is coated with special chemical dots called what. pg-199
Phosphors
A special metallic screen called a _______ has holes spaced and angled in an extremely precise manner. pg-199
Shadow mask
Is the measurement between the same spot in two vertically adjacent dot trios. pg-200
Dot pitch
Is defined by how many software picture elements pixels are used to draw the screen. pg-200
Resolution
An active- matrix screen is made up several independent LCD pixels. pg-201
Active matrix
Display does not have a dedicated transistor for each pixel or subpixel but instead a matrix of conductive traces.pg-202
Passive matrix
Is a variation of the passive- matrix display.pg-202
Dual scan
Because the computer takes hundreds of milliseconds to change a pixel in passive-matrix display the response of the screen to rapid changes is poor causing for example an effect known as what. pg-203
Submarining
Is a panel that fits over the front of a display and through a polarization affect intentionally limits the viewing angle of the monitor. pg 203
Privacy filter
These same filters as well as specialty versions can act as ________ brightening and clarifying the image appearing on the monitor’s screen. pg-203
Antiglare filters
higher refresh rates in LCDs lead to an unwanted artificial or noncinematic quality to video known as the what. pg-204
soap-opera effect
unlike LED display really are the image producing parts of the display not just the light source. pg 204
(OLED) Organic light emitting diode
What does HID stand for. pg-207
High-intensity discharge
Is a unit of measure for the total amount of visible light that the projector gives off based solely on what the human eye can perceive and not also on invisible wavelengths. pg-207
Lumen (lm)
technically the vertical scan frequency and specifies how many times in one second the scanning beam of electrons redraws the screen in CRTs. pg-209
Refresh rate
Display adapters through the years can be divided into five primary groups: pg-220
monochrome CGA EGA VGA DVI, HDMI, and other modern digital video
is the reduction of the magnetic field of an object. pg 217
Degaussing
the Hercules graphics card (HGC) introduced by Hercules computer technology had a resolution of 720 x 350 and could display graphics as well as text. It did this by using two separate modes: pg-221
text mode= that allows the adapter to optimize its resources for displaying predrawn characters from its onboard library.
graphics mode= that optimized the adapter for drawing individual pixels for onscreen graphics.
(CGA) stands for what. pg-221
color graphics adapter
(EGA) stands for what. pg- 222
Enhanced graphics adapte
(VGA) stands for what. pg-222
video graphics array
(MCA) stands for what. pg-223
micro channel architecture
(XGA) stands for what. pg-223
extended graphics
Is the measure of the ratio of the luminance of the brightest color to that of the darkest color the screen is capable of producing. pg 226
contrast ratio
is a adjustable setting on all monitor usually found alongside brightness that changes the relative brightness of adjacent pixels.
contrast
