There are two main types of mobile phone screens: TFT-LCD screens which use a backlight and are passive, and OLED screens which can self-illuminate without a backlight and are active. TFT-LCD screens often use TN technology which is low-cost but has poor viewing angles and color reproduction, while OLED screens mainly use AMOLED as in Samsung phones and IPS screens have wide viewing angles and good color accuracy but higher costs.

1. • At present there are only two mobile phone screen
classification.
• TFT - LCD and OLED
• They respectively represent the passive and active
display screen.
• 1>Passive panel need the support of the back light.
• 2>Active panel can self-illuminate and need no
back light.

2.  OLED mainly represented by Samsung Super
AMOLED(Super Active Matrix Organic Light
Emitting Diode).

3.  TN(Twisted Nematic )- Low-cost make it is one of
the most widely used screen. but the disadvantage is
that small visual Angle, color reduction ability is
limited
 VA(Vertical Alignment)-- It doesn't suitable for
touch panel of mobile phone because it will have
ripple of pressing.

4.  IPS(In-Plane Switching)-- With advantages of
wide visual angle and good performance of
color reduction.
 CPA(Continuous Pinwheel Alignment)--
Technology of Sharp with good visual angle
and color reduction ability but too much costly.

5.  HUAWEI INDIA TRAINING TEAM.