1.2 Mobile Display Types

Question 1

LCD

Answer 1

Liquid Crystal Display
* DOESN’T produce light
* Uses a backlight
o CCFL = Cold Cathode Fluorescent Lamp
o Can use Streps of LED lights

Question 2

Inverter

Answer 2

• Converts DC  AC for the backlight
• Flickering / dimness = problem with inverter

Question 3

TN

Answer 3

Twisted Nematic
a. Very old [not a good viewing angle]
b. Good response time
c. Very little lag, high refresh rate, 240 Hz
d. Bad color

Question 4

IPS

Answer 4

In-Plane Switching
a. Great color
b. Good viewing angle
c. Little lag

Question 5

VA

Answer 5

Vertical Alignment
a. Great color
b. Okay response

Question 6

OLED

Answer 6

Organic Light Emitting Diode
a. Light-emitting compound
b. NO need for a backlight
c. Contrast ratio of OLED displays exceed that of LCD panels
i. Contrast Ratio = levels of blackness
ii. Black images look good compared to LCD
d. OLED are the highest quality
e. Found in smaller devices = smart phones