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CompTIA A+ 220-1101 and 220-1102 > Displays > Flashcards

Displays Flashcards

1
Q

What is a capacitive touch screen ?

A

Measures electromagnetic distortion and translates that in to x and y coordinates

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2
Q

Which touch screen technology allows you to make more than input?

A

Multi-touch screen

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3
Q

How many Inputs can you have in a capacitive touch screen?

A

1, if you touch 2 places it will take the average.

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4
Q

What is a LCD display

A

Liquid crystal display, uses liquid crystal where the properties can change with voltage

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5
Q

What is TN?

A

Twisted Nematic, crystals twist and untwist as response from voltage.

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6
Q

Would TN be considered fast or slow?

A

Fast

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7
Q

Is the viewing angle narrow or wide for TN

A

Narrow

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8
Q

Is the colour reproduction poor or good for TN?

A

Poor

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9
Q

Is the contrast poor or good for TN?

A

Poor

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10
Q

What is IPS?

A

In-plane switching, Crystals rotate as a response to voltage

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11
Q

Would IPS be considered fast or slow?

A

Slow

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12
Q

Is the viewing angle narrow or wide for IPS

A

Wide (178 degrees)

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13
Q

Is the colour reproduction poor or good for IPS?

A

Good (excellent)

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14
Q

Is the contrast poor or good for IPS?

A

Moderate

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15
Q

What is VA?

A

Vertical alignment, crystals tilt as a response

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16
Q

Would VA be considered fast or slow?

A

Moderate

17
Q

Is the viewing angle narrow or wide for VA

A

Moderate

18
Q

Is the colour reproduction poor or good for IPS?

A

Good

19
Q

Is the contrast poor or good for IPS?

A

Good

20
Q

Why is a backlight necessary?

A

Because the crystal make very little light

21
Q

What is a CCFL

A

Cold cathode fluorescent lamp, common type of back light.

22
Q

What is a LED

A

Light Emitting diode, better performance for than CCFL and are thinner

23
Q

What is an OLED?

A

Organic LED, each pixel gets its own led backlight, even more energy efficient and even thinner.

24
Q

What’s the disadvantage when it comes to OLED backlight?

A

The maximum brightness is less and are susceptible to burn in.

CompTIA A+ 220-1101 and 220-1102 (14 decks)

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