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LCD Technology Essentials Quiz

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Questions and Answers

What is the purpose of the polarizing filter in an LCD?

To provide a reflective surface for the display
To align the layers in contact with the liquid crystal
To create the transparent electrode pattern
To control the amount of light passing through the liquid crystal (correct)

What happens if there is no liquid crystal between the polarizers in an LCD?

The liquid crystal would not be able to align properly
The crossed polarizers would block out the light, making the screen appear dark (correct)
The polarizers would allow all light to pass through
The screen would appear brighter than usual

What effect do adjusting the voltages on the electrodes have on the LCD?

It alters the transparent electrode pattern
It changes the color temperature of the display
It changes the amount of twist in the liquid crystal and varies the amount of light passing through (correct)
It modifies the alignment layers in contact with the liquid crystal

What is the function of the clear common electrode on glass in an LCD?

To provide a path for the voltage to be applied across the liquid crystal (B) Signup and view all the answers

What is the purpose of the reflective surface or light source in an LCD?

To provide the necessary light for the display (B) Signup and view all the answers

What happens if the voltages on the electrodes are adjusted in an LCD?

The amount of twist in the liquid crystal changes, varying the amount of light passing through (D) Signup and view all the answers

What is the function of the alignment layers in contact with the liquid crystal in an LCD?

To control the orientation of the liquid crystal molecules (A) Signup and view all the answers

What is the purpose of the transparent electrode pattern on the glass plate in an LCD?

To apply voltages to the liquid crystal material (D) Signup and view all the answers

What role does the polarizer with crossed axis play in an LCD?

It blocks out light when there is no liquid crystal between the polarizers (A) Signup and view all the answers

Why would the crossed polarizers block out light in an LCD without the liquid crystal?

Due to the inability to transmit light with perpendicular axes (B) Signup and view all the answers

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