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WorksheetsM5.11 Electronic Displays B1 and B2
Total questions: 15
Worksheet time: 8mins
What is an LED?
Liquid Crystal Display
What is a LCD?
Light Charge Device
What is a CRT?
What is a disadvantage of an LED?
They are not very colourful.
The are not flexible.
What is a seven segment display?
A display with seven colours
A display made from seven LEDs.
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
What indication is given to the aircrew that the Electronic Flight Instrument System's cathode ray tube has exceeded 70°C?
Raster display is shut down.
Stroke display is shut down.
Audio warning and flashing attention getters
Which statement is true for the use of the raster scan in a glass cockpit system?
It is used for symbols and letters.
It is used for coloured areas like weather and artificial horizon.
It is used in case of display overheating.
Which colour does not show if the red electron beam in a display unit fails?
Yellow
Cyan
Green
Which statement is true for LCDs?
They give off light
They require a direct current to drive them
They control light
They can only produce raster imagery
What is an advantage of OLEDs over LCDs?
They have an unlimited life span
They are better for very large displays
They require no back light
They can produce more colours
