Section 1.0 - Hardware


SubSection 1.7 Display Devices
Please explain the components below and include pictures (make sure you cite correctly).

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Projectors

- Is a device that displays videos, images, or computer data on a screen or other flat surface.
LCD Projector
LCD Projector

CRT Monitor
CRT Monitor

CRT

  • Cathode Ray Tube- Uses a vacuum tube which controls the flow of electric current through a vacuum, which contains an electron gun which is a source of electrons. Also has a florescent screen to view images.



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LCD Monitor

LCD

  • Liquid Crystal Display- Uses layers of liquid crystals, a fluorescent light source, and polarizing filters.
  • Liquid Crystals- Are Chemicals whose molecules can be aligned by the presence of an electrical field. While aligned the crystals allow light to pass through them

LCD Technologies

    • Resolution- Is usually measured in width x height with each unit measured an pixels. An example of this is if the resolution is "1024x768" which means the width of the pixels is 1024 and the height is 768. This is known as Display Resolution.

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Resolution Types

  • Contrast Ratio-is the difference between the brightest white of a display and the darkest black of the display.








  • Aspect Ratio- Is the relationship between the width and height of an image: examples being 16:9 and 4:3






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Connector Types

  • VGA-(Video Graphics Array) Is a three row 15 pin connector used to connect the monitor to the video card found on most video cards
VGA Cable
VGA Cable


  • HDMI- (High Definition Multimedia Interface) Is a compact audio and video interface that transmits digital non compressed digital data.
HDMI Cable
HDMI Cable


  • S-Video- (Super-Video) Is a cable that transmits the video signals through the cable by dividing the video information in to two separate signals.
  • The two Signals Are:
  1. Chrominance- used for Color
  2. Luminance- used for Brightness
S-Video Cable
S-Video Cable

  • Component /RGB- Is a video signal that is separated in to multiple component channels. it is a type of analog video known as CAV or Component Analog Video it is data transmitted or stored as three different signals.
Component Cable
Component Cable

  • DVI Pin Compatibility-( Digital Visual Interface) is a higher quality cable than VGA it uses digital signals instead of analog like VGA's but can also do analog if you'd like to.
DVI Cable
DVI Cable

Settings

  • Refresh Rate-Is the number of times in a second that a screen redraws the image. Usually measured in Hertz(Hz), and is determined by the video card. Remember!! the Higher the refresh rate the smoother the image will be displayed on the screen.
  • Resolution- this refers to the number of pixels in the entire screen.



  • Multi-monitor-also known as Multi-Head, or Multi-Display is the use of multiple display devices such as monitors, televisions, projectors to give you more display area to use while using one computer.



Degauss-is the process of removing unwanted magnetic fields from inside the CRT monitor.



(Created by Geraldo Rivera Jr.)