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CompTIA A+ Certification Prep 3: Network/Security > Lesson 1 - Chapter 1: Display Screens, Monitors, and Projectors > Flashcards

Lesson 1 - Chapter 1: Display Screens, Monitors, and Projectors Flashcards

1
Q

A stand-alone display with its own power cord is called a?

A

Monitor

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2
Q

What is a display adapter?

A

A display adapter converts and processes instructions from the OS and relays them to the display

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3
Q

What does the display adapter use to process the OS instructions?

Hint: What does the OS use to process instructions?

A

A display adapter uses its own GPU to process the OS’s instructions

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4
Q

What do you call a display adapter that is a separate circuit board from the motherboard?

A

A video card

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5
Q

Video cards have their own separate ____

Hint: Temporary Memory

A

Video RAM (VRAM)

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6
Q

Screens designed for 1 person viewing at a time are called what?

A

Display screen (desktop, laptop, mobile)

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7
Q

What is a color LCD screen also called?

A

LCD panel

(tiny liquid crystal subpixels in rows and columns between filters)

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8
Q

What’s the difference between a subpixel and a pixel?

A

a pixel is made up of 3 colored subpixels (red, green, blue)

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9
Q

What does native resolution refer to?

A

The highest resolution it’s capable of

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10
Q

When possible, you should match what 2 display-related things in order to prevent a fuzzy display picture?

A

Match the OS’s display resolution with the display’s native resolution

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11
Q

The motherboard in an LCD monitor is called…?

Hint: Rapper

A

The logic board

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12
Q

A transformer on a LCD monitor does what?

A

it converts the power from the wall outlet into DC power the logic board can use

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13
Q

Which of the 2 LCD monitor backlights requires an inverter?

A

CCFL backlights (cold cathode fluorescent lighting)

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14
Q

CCFL backlights need what kind of power?

A

high-voltage AC power

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15
Q

What does a CCFL backlight need to convert the AC power to DC power?

A

Power inverter

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16
Q

What are some types of ports that would send data in analog and require an analog-to-digital converter? (2 kinds)

A

VGA and some DVI

17
Q

LCD panels today use active matrix technology called what? What does it create? (2)

A
  1. Thin Film Transistors (TFT)
  2. Creates a responsive, colorf-saturated display
18
Q

What does active matrix mean?

A

Active matrix means that every pixel is individually powered

19
Q

The most common thin film transistors (TFT) are made with what kind of technology?

A

Twisted-Nematic (TN)

20
Q

TFT displays made with TN technology have what 2 positives?

A
  1. Inexpensive to produce
  2. Supports high refresh rates
21
Q

A monitor that supports high refresh rates is good for gaming. Which type of monitor would that be?

A

a TFT display made with Twisted-Nematic (TN) technology

22
Q

What are refresh rates?

A

The amount of times per second each pixel is refreshed

23
Q

What are 6 negatives to using a Twisted-Nematic display?

  1. L
  2. U
  3. M
  4. In
  5. Im
  6. P
A
  1. Limited Viewing Angles
  2. Uneven Backlighting
  3. Motion Blur
  4. Input Lag
  5. Imprecise Color Fidelity
  6. Poor Visibility in Sunlight
24
Q

What are 3 positives to using IPS technology?

A
  1. Better Color Fidelity
  2. Better Viewing Angles
  3. Good Contrast Ratio
25
Q

Would an IPS monitor be ideal for gaming and graphic design?

A

No only for graphic design due to its low refresh rate

26
Q

What are 2 negatives to using IPS?

A
  1. Lower maximum refresh rates
  2. Lower response rates
27
Q

Since Vertical Alignment technology is a compromise between IPS and TN, what is VA better than IPS and TN in?

A

IPS: higher refresh rates than IPS

TN: better color fidelity, brightness, and viewing angles than TN

28
Q

Where would you find OLED displays?

A

Some high-end laptops

29
Q

What is contrast ratio?

A

The difference between the darkest and lightest spots the monitor can dispplay

30
Q

What’s a good contrast ratio?

A

450:1

(OLED 1000:1, LCDs lower levels 250:1)

31
Q

What does an LCD panel’s response rate measure?

A

How fast all the subpixels go from pure black to pure white and back measured in milliseconds (ms)

(lower is better, higher might see ghosting)

32
Q

What does the refresh rate of an LCD monitor measure?

A

How often a screen can completely change or update

33
Q

What is lumens?

A

the amount of light given off from a light source from an angle perceived by our eyes

(lights…humans… lumens)

34
Q

What is a projector’s throw?

A

the size of the image at a certain distance from the screen

(throwing up an image)

35
Q

What is a projector’s lamp?

A

the bulb that creates the brightness

36
Q

What are 3 factors that affect a display’s performance?

A
  1. Contrast Ratio
  2. Response Rate
  3. Refresh Rate

CompTIA A+ Certification Prep 3: Network/Security (45 decks)

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