An Overview of Display Device Types - CompTIA A+ 220-801: 1.10

CRT (Cathode Ray Tube)

• Size
• i.e., 15", 19" , 21"
• Resolution
•  XGA/1024x768
• SXGA/1280x1024
• UXGA/1600x1200
• Refresh rate (hertz/Hz)
• Higher is better on the eyes

LCD (Liquid Crystal Display)

LED and OLED

• Backlight is LEDs instead of florescent
• An LED- backlit LCD display
• LED's around the edge of the screen
• Diffused to evenly light the display

• An array of LED's behind the screen
• May be dimmed individually

• Organic Light Emitting Diode
• Organic compound emits light when receiving an electric current
• Low cost, power efficient, wider viewing angle, fast response time

 Plasma display

• A display of tiny cells
• Noble gas and mercury
• Voltage forms a plasma
• Mercury sheds energy as UV light

• UV light strikes colored phosphor
• And you see a baseball game

• Deep blacks, fast response time
• Very good color representation

• Shimmering, high power
• Doesn't work well at high altitudes, lots of radio interference

Digital projectors

• Not always "LCD"
• Very bright (very hot) light