1.2 Laptop Displays

Question 1

Describe LCD

Answer 1

• Backlight that shines through liquid crystals, color components, and other filters
• Advantages are: lightweight, low power, inexpensive
• Disadvantages: Black levels are a challenge, requires separate backlight. difficult to replace if backlight breaks

Question 2

Describe OLED

Answer 2

• Organic compounds emit light When receiving an electrical current
• Thinner and lighter
• No backlight required, the organic compounds provide the light
• Organic materials decay over time.
• Decayed images can stay on screen
• More costly and power hungry than LCD
• Not ready for laptops yet

Question 3

Describe Antennas in a laptop

Answer 3

There’s usually multiple antennas in the laptop

• Multiple antennas, WiFi, Aux, and Bluetooth, cellular.
• Antenna wires wrap all the way around laptop screen

Question 4

Describe Webcams in a laptop.

Answer 4

• Usually built in at the top of the display. Usually have audio and video capabilities.
• The audio is not high quality

Question 5

What are the 2 different types of back lights you’ll find on a laptop?

Answer 5

• LED. LCD display being backlit with LEDs. LEDs use the same DC voltage, therefore no voltage conversion. Most laptops use these
• CCFL: Use higher power, older technology. Some laptops have inverters that convert DC into AC.
• Inverters are used primarily used in older laptops
• If the back light stop working the screen will be dark. If you use a flashlight you can still see info on the screen.

Question 6

What is a digitizer?

Answer 6

• Allows you to use a pen or stylus like device to write or draw on the laptop or tablet.

Question 7

Touchscreen

Answer 7

• You can input info into the device without a stylus. Usually devices that have the option for keyboard support. Or you can use it as a single tablet.