CompTIA A+ Mobile Display Question
-
Hey! After watching the Mobile Device Displays video multiple times, there is something I still do not understand. I get that there are both OLED and LCD displays, and both can either be a Active Matrix display or Passive Matrix display. And It seemed to me that the video used AM displays and TFT displays almost interchangeably. What I do not understand is where the other display categories fit in (IPS, TN, VA, ect...). Is a IPS display just another sub-category of a AM display? On other resources it seems like AM or PM displays are just the general structure, and then they can be specified by either being IPS, TN, TFT, ect... but that is not what I was understanding from the video. Also, depending on your answer, does this mean that there are IPS (TN, VA, ect...) PM/AMOLED displays?
-
Hey @Max-Guzman great question! Here is a summary to help you out:
LED
AMOLED = active matrix, TFT-based LED screen option (each pixel is a self-illuminating diode)
PMOLED = no TFT, LED-based screen optionLCD
TN = active matrix, TFT-based LCD screen option (older)
IPS = active matrix, TFT-based LCD screen option (improvement over TN)Matrix types
Passive matrix - rows and columns using a single transistor for each row and column.
Active matrix - uses thin-film tranistors, arranged in a grid pattern which are used to turn each pixel on and off. -
@wes-bryan Thank you so much for the response. One last clarification if I may, are VA displays passive matrix or active. Thank you again.
-
Another great question!
The Vertical Alignment like the IPS
VA = LCD-based display using vertical crystal alignment
IPS =LCD-based display using parallel crystal alignment
Passive-matrix VA is called Vertical Alignment Nematic or VAN
Active-matrix VA are called Multidomain Vertically Aligned or MVA and Patterned Vertically Aligned or PVA