Laptop Displays

Question 1

What does LCD stand for

Answer 1

Liquid crystal display

Question 2

Describe LCD

Answer 2

Light shines through liquid crystals

Question 3

Advantages of LCD

Answer 3

– Lightweight
– Relatively low power
– Relatively inexpensive

Question 4

Disadvantages of LCD

Answer 4

– challenge to display true black
– Requires separate backlight
– Lights are difficult to replace

Question 5

Describe TN LCD

Answer 5

original LCD technology
fast response times(gaming)
poor viewing angles, colour shifts

Question 6

Describe IPS LCD

Answer 6

– Excellent color representation

– More expensive to produce than TN

Question 7

Describe VA LCD

Answer 7

– A good compromise between TN and IPS
– Good color representation
– Slower response times than TN

Question 8

What does TN stand for

Answer 8

twisted nematic

Question 9

What does IPS stand for

Answer 9

in plane switching

Question 10

What does VA stand for

Answer 10

vertical alignment

Question 11

What does OLED stand for

Answer 11

Organic Light Emitting Diode

Question 12

Describe OLED

Answer 12

Organic compound emits light when

receiving an electric current

Question 13

Advantages of OLED

Answer 13

thinner and lighter

accurate colour representation

Question 14

Disadvantages of OLED

Answer 14

a bit higher cost than LCD

Question 15

What is OLED used in

Answer 15

found on laptops, phones and smart watches

Question 16

Describe Backlight for OLED

Answer 16

No backlight needed, the organic compound provides the light

Question 17

Why is OLED thinner and lighter

Answer 17

no backlighting
no LCD
no glass to protect

Question 18

Describe Wi-Fi Antennas

Answer 18

Multiple antennas, antenna wires wrap around the laptop screen up high.

Question 19

Describe Webcams

Answer 19

Video capture with built in camera and microphone

Specialised drivers and software

Question 20

Describe Microphone

Answer 20

Built in to the laptop display

Not good for non-casual use

Question 21

What are microphones useful for

Answer 21

video calls

Question 22

What does CCFL stand for

Answer 22

Cold Cathode Fluorescent Lamp

Question 23

Describe CCFL

Answer 23

– Higher voltage and power needed
– Added thickness to the display
– No longer a common backlight
– Older laptops will use these

Question 24

Describe LED backlighting

Answer 24

LED-backlit LCD display
– Backlight is LEDs instead of florescent
– LEDs around the edge of the screen
– An array of LEDs behind the screen
– The latest laptops are LED-backlit

Question 25

Important info on LCD displays

Answer 25

Need a backlight so Florescent lamp/LED to LCD can be displayed to your eyes

Question 26

Describe inverters

Answer 26

required due to CCFL backlight requires AC power, but laptop is using DC power

Question 27

Why inverter useful

Answer 27

convert dc power into ac power

Question 28

How to verify if backlight or display fucked

Answer 28

shine flashlight at screen, can see then the display is ok

Question 29

What to do if backlight fails

Answer 29

May need to replace the LCD inverter or display

Question 30

Describe digitizer

Answer 30

may be able to use stylus device as converts analog input on the display into digital signals that computer can used

Question 31

Where are stylus like devices found to be used

Answer 31

laptop or tablets or hybrids

Question 32

Describe touchscreen

Answer 32

converts input from many options such as finger, stylus, keyboard