What is the reason for using CRT used instead of LCD or LED displays?(a) To meet the required brightness level(b) Cheap to manufacture(c) Low energy of operation(d) LightweightThe question was posed to me during an interview.Origin of the question is Head Up Displays topic in division Displays and Man-Machine Interaction of Avionics

What is the reason for using CRT used instead of LCD or LED displays?(

1.	What is the reason for using CRT used instead of LCD or LED displays?(a) To meet the required brightness level(b) Cheap to manufacture(c) Low energy of operation(d) LightweightThe question was posed to me during an interview.Origin of the question is Head Up Displays topic in division Displays and Man-Machine Interaction of Avionics
Answer» Right choice is (a) To MEET the required brightness level Easiest explanation: To clearly see the flight PARAMETERS displayed on the COMBINER glass against the bright sky, it is necessary to achieve a display brightness of 30,000 Cd/m^2. This high brightness requirement is the reason why CRT is used instead of LCD or LED, even though CRT’s are heavier and require more POWER to run.

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