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Module5.11ElectronicDisplay(1of3)
Sub-Module 11 - Electronic Displays
Principles of operation of common types of displays used in modern aircraft, including Cathode Ray Tubes, Light Emitting Diodes and Liquid Crystal Display.
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Magnetic deflection in a CRT is achieved by.
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1 point
a sawtooth waveform.
a trapezoidal waveform.
a sinusoidal voltage.
A beam deflection on EFIS displays are.
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electrostatic.
electromagnetic.
Option C. solid state.
Correct Answer is. electromagnetic.
Explanation. Aircraft Instruments and Integrated Systems EHJ Pallett Page 297.
An LCD display uses what type of power supply?.
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DC voltage.
Continuous AC.
Variable level DC voltage.
The timebase in a CRT consists of.
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an amplifier and an oscillator.
an oscillator only.
an amplifier only.
The inside of a CRT consists of.
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an oxide coating and rare mercury gas.
a phosphor coating and rare mercury gas.
iodine and rare mercury gas.
LCD screens are driven by.
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AC voltage.
variable current DC voltage.
fixed current DC voltage.
What creates the raster effect on a CRT?.
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Sawtooth frequency.
Trapezoidal frequency.
Sinusoidal frequency.
CRT horizontal beam control is achieved by a.
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sinusoidal wave.
square wave.
sawtooth wave.
The supply to an LCD is.
Option A. AC.
Option B. current restricted DC.
Option C. voltage restricted DC.
Correct Answer is. AC.
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Option 1
What are the effects of the X and Y plates on a CRT?.
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Y plates move the beam vertically, X plates move the beam horizontally.
X plates move the beam vertically, Y plates move the beam horizontally.
X and Y plates can move the beam in either direction.
In a CRT, if the magnetic field is parallel to the Y plates, what will be the direction of the electron beam movement?.
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Horizontal.
Vertical.
No movement.
Primary colours of a CRT are.
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red, green and yellow.
red, blue and yellow.
red, green and blue.
An LED display is.
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monochrome only.
red and green.
high definition.
What frequency creates the raster effect on a CRT?.
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50/60 Hz.
250Hz.
400 Hz.
What shape does the waveform take to counter the impedance effect of the coils in an electromagnetic controlled CRT?.
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1 point
Sawtooth.
Rectangular.
Trapezoid.
A Liquid Crystal Display (LCD) has the advantage over a CRT that.
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it requires no cooling.
it displays more colours.
it requires less servicing.
EADI sky and ground display is provided by.
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synthetic TV signals.
stroke pulse.
raster scan.
The release of a photon by another photon is the principle of.
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a photo diode.
a zener diode.
an LED.
If a magnetic field is parallel to the X plates in a CRT, which way will the beam move?.
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Vertically.
Horizontally.
Diagonally.
The sweep waveform used on a electromagnetic CRT is.
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1 point
trapezoidal.
sinusoidal.
sawtooth.
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