M5.11 Electronic Displays B1 and B2

What is an LED?

• Light Emitting Diode
• Laser Emitting Device
• Light Enhancing Device
• Liquid Crystal Display

What is a LCD?

• Light Crystal Display
• Large Crystal Display
• Light Charge Device

• Liquid Crystal Display

What is a CRT?

• Cathode Ray Tube
• Circuitry Response Time
• Computer Resolution Technology
• Cathode Ray Television

What is a disadvantage of an LED?

• They are not very colourful.

• The are not flexible.

• Higher energy consumption compared to traditional light bulbs
• Less bright than traditional light bulbs

What is a seven segment display?

• A display with seven colours

• A display made from seven LEDs.

• A type of dance popular in the 1920s
• A display that can only display the numbers up to seven.

What is the disadvantage of a LCD?

• Cooling is required

• Backlight is needed

• High power consumption

• Radiation

What do Liquid Crystal Displays do?

• Radiate light and they must be used in well lit areas.

• Control light, but do not radiate light.

• Control and radiate light.

How is colour added to a LCD?

• Dye sublimation in each liquid crystal

• Doping of the semiconductor in each LED

• Colour filters are added on top of the liquid crystal layer.

What is the purpose of raster scanning in a Cathode Ray Tube (CRT)?

• To display background information

• To display characters and figures

• For all imagery on the screen

What method is used to display symbols and parameters on a CRT?

• Raster Scanning

• Stroke Scanning

• Active Matrix

• Passive Matrix