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CompTIA A+ > 1101 1.2 Mobile Displays > Flashcards

1101 1.2 Mobile Displays Flashcards

1
Q

What are the main types of display technologies used in mobile devices?

A

The main types are Liquid Crystal Display (LCD) and Organic Light Emitting Diode (OLED).

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2
Q

What are the subtypes of LCD technology?

A

The subtypes of LCD technology include In-plane Switching (IPS), Twisted Nematic (TN), and Vertical Alignment (VA).

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3
Q

What is an IPS LCD?

A

IPS (In-plane Switching) LCD provides excellent color representation and viewing angles, ideal for graphics and desktop publishing.

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4
Q

What are the characteristics of TN LCD?

A

TN (Twisted Nematic) LCD offers very good response times but poor viewing angles, often leading to color inversion when viewed from the side.

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5
Q

What is a VA LCD?

A

VA (Vertical Alignment) LCD offers a balance between color representation and response times, slower than TN but better than IPS in response.

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6
Q

What is an OLED display?

A

OLED (Organic Light Emitting Diode) displays do not require a backlight as the organic material emits light when powered, allowing for thinner and lighter displays with excellent color and true blacks.

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7
Q

What are the advantages of using LCD displays in laptops?

A

LCD displays are lightweight, use little power, and are relatively inexpensive to manufacture.

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8
Q

What is a major disadvantage of LCD displays?

A

Achieving true black is difficult because the backlight must shine through the liquid crystals, affecting the depth of black colors displayed.

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9
Q

How does backlight type influence LCD display?

A

Backlights can be fluorescent, LED, or other types, influencing the brightness, power consumption, and thickness of the display.

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10
Q

What happens if the backlight in an LCD fails?

A

If the backlight fails, it can be difficult to repair or replace, often requiring a complete display replacement.

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11
Q

What are common backlight types for modern LCD displays?

A

Modern LCDs typically use LED backlights, which can be arranged around the edges or in a matrix, offering better power efficiency and thinner profiles.

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12
Q

What role do inverters play in LCD displays with CCFL backlights?

A

Inverters convert DC power from the laptop into AC power needed to light the CCFL (Cold Cathode Fluorescent Lamp) backlight.

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13
Q

How can you tell if an LCD’s backlight has failed?

A

Shining a flashlight on the display can reveal if images are visible. If they are, the issue might be the backlight, not the display itself.

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14
Q

What is a digitizer in a mobile display?

A

A digitizer converts analog inputs from a stylus or touch into digital signals that the device can process.

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15
Q

How do wireless antennas integrate with laptop displays?

A

Antennas for Wi-Fi and Bluetooth are often routed along the display assembly to utilize the height for better signal reception.

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16
Q

What is the role of the webcam in laptop displays?

A

Integrated webcams facilitate video conferencing and calls, often accompanied by microphones embedded in the display bezel.

17
Q

What should be considered when replacing a laptop display with integrated antennas?

A

It’s crucial to reconnect all antenna wires properly to maintain wireless connectivity and video component connections.

18
Q

Describe the maintenance considerations for displays with CCFL backlights.

A

CCFL backlights may require replacement of inverters or the entire backlight unit due to their need for AC power.

19
Q

How does LED backlighting in LCDs compare to older backlight technologies?

A

LED backlights are thinner, use less power, and offer better durability compared to older fluorescent backlights

20
Q

What is the significance of LED matrices in modern displays?

A

LED matrices allow for precise control of backlighting, improving the dynamic range and contrast of the display.

21
Q

Why do OLED displays have superior color representation?

A

Without a backlight, each pixel in an OLED display emits its own light, allowing for perfect blacks and vibrant colors.

22
Q

What are the benefits of using OLED over LCD in mobile devices?

A

OLEDs are thinner, lighter, and offer better viewing angles and color accuracy than LCDs.

23
Q

How does the choice of display type affect battery life in mobile devices?

A

OLED displays generally consume less power than LCDs when displaying true black, as they can turn off pixels completely.

24
Q

Compare the cost implications of IPS vs. TN LCD technologies.

A

IPS displays are generally more expensive than TN due to their superior color accuracy and viewing angles.

25
Q

What is the impact of display type on mobile device design?

A

Display type affects device thickness, weight, battery life, and overall aesthetics, influencing consumer choice and device functionality.

CompTIA A+ (14 decks)

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