1.2 Laptop Displays

Question 1

LCD

Answer 1

Liquid crystal display
2 types:
1. CCFL: cold cathode fluorescent lamp
- used in old laptops
- thicker and higher voltage needed
2. LED-Backlit
- new laptops
- array of LEDs behind the screen

Question 2

TN

Answer 2

Twisted Nematic LCD
- OG LCD
- fast response time
- poor view angles
- low color quality

Question 3

IPS

Answer 3

In-Plane Switching LCD
- slower than TN
- excellent color representation
- wide view angles
- poor contrast
- more expensive

Question 4

VA

Answer 4

Vertical Alignment LCD
- compromise between TN & IPS
- good color representation
- high contrast ratio
- good viewing angles
- slower than TN

Question 5

OLED

Answer 5

Organic Light Emitting Diode
- thinner and lighter than LCD
- no glass, no backlight
- higher contrast & lower overall brightness
- tablets, phones, smart watches
- expensive

Question 6

Where are Wi-Fi antennas located in laptops?

Answer 6

Top of laptop display
Wires wrap around the screen

Question 7

Inverter

Answer 7

Converts DC power to AC and supplies voltage to the display backlights

Question 8

Digitizer

Answer 8

Uses a stylus or touchscreen as input and converts it to digital form