Lesson 1 - Chapter 1: Display Screens, Monitors, and Projectors Flashcards
A stand-alone display with its own power cord is called a?
Monitor
What is a display adapter?
A display adapter converts and processes instructions from the OS and relays them to the display
What does the display adapter use to process the OS instructions?
Hint: What does the OS use to process instructions?
A display adapter uses its own GPU to process the OS’s instructions
What do you call a display adapter that is a separate circuit board from the motherboard?
A video card
Video cards have their own separate ____
Hint: Temporary Memory
Video RAM (VRAM)
Screens designed for 1 person viewing at a time are called what?
Display screen (desktop, laptop, mobile)
What is a color LCD screen also called?
LCD panel
(tiny liquid crystal subpixels in rows and columns between filters)
What’s the difference between a subpixel and a pixel?
a pixel is made up of 3 colored subpixels (red, green, blue)
What does native resolution refer to?
The highest resolution it’s capable of
When possible, you should match what 2 display-related things in order to prevent a fuzzy display picture?
Match the OS’s display resolution with the display’s native resolution
The motherboard in an LCD monitor is called…?
Hint: Rapper
The logic board
A transformer on a LCD monitor does what?
it converts the power from the wall outlet into DC power the logic board can use
Which of the 2 LCD monitor backlights requires an inverter?
CCFL backlights (cold cathode fluorescent lighting)
CCFL backlights need what kind of power?
high-voltage AC power
What does a CCFL backlight need to convert the AC power to DC power?
Power inverter
What are some types of ports that would send data in analog and require an analog-to-digital converter? (2 kinds)
VGA and some DVI
LCD panels today use active matrix technology called what? What does it create? (2)
- Thin Film Transistors (TFT)
- Creates a responsive, colorf-saturated display
What does active matrix mean?
Active matrix means that every pixel is individually powered
The most common thin film transistors (TFT) are made with what kind of technology?
Twisted-Nematic (TN)
TFT displays made with TN technology have what 2 positives?
- Inexpensive to produce
- Supports high refresh rates
A monitor that supports high refresh rates is good for gaming. Which type of monitor would that be?
a TFT display made with Twisted-Nematic (TN) technology
What are refresh rates?
The amount of times per second each pixel is refreshed
What are 6 negatives to using a Twisted-Nematic display?
- L
- U
- M
- In
- Im
- P
- Limited Viewing Angles
- Uneven Backlighting
- Motion Blur
- Input Lag
- Imprecise Color Fidelity
- Poor Visibility in Sunlight
What are 3 positives to using IPS technology?
- Better Color Fidelity
- Better Viewing Angles
- Good Contrast Ratio
Would an IPS monitor be ideal for gaming and graphic design?
No only for graphic design due to its low refresh rate
What are 2 negatives to using IPS?
- Lower maximum refresh rates
- Lower response rates
Since Vertical Alignment technology is a compromise between IPS and TN, what is VA better than IPS and TN in?
IPS: higher refresh rates than IPS
TN: better color fidelity, brightness, and viewing angles than TN
Where would you find OLED displays?
Some high-end laptops
What is contrast ratio?
The difference between the darkest and lightest spots the monitor can dispplay
What’s a good contrast ratio?
450:1
(OLED 1000:1, LCDs lower levels 250:1)
What does an LCD panel’s response rate measure?
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)
What does the refresh rate of an LCD monitor measure?
How often a screen can completely change or update
What is lumens?
the amount of light given off from a light source from an angle perceived by our eyes
(lights…humans… lumens)
What is a projector’s throw?
the size of the image at a certain distance from the screen
(throwing up an image)
What is a projector’s lamp?
the bulb that creates the brightness
What are 3 factors that affect a display’s performance?
- Contrast Ratio
- Response Rate
- Refresh Rate
