LCD Basic

TN-LCD ( Twisted Nematic LCD)

Black icons on the white display 

High contrast and wide viewing angle for displays with a less than 1/4 duty cycle.
Less than 1/16 duty cycle


Fast response time ( <100ms)











STN-LCD ( Super Twisted Nematic LCD)
Black icons on yellow green background( Yellow-green mode)
White icons on dark blue background ( Negative tranmissive mode)
Purple icons on the gray background ( Gray mode)
Suitable for >1/16 duty cycles

Wider viewing cone than TN-LCD

More symmetrical viewing cone than TN-LCD
High contrast and wide viewing angle for displays with a less than 1/16 duty cycle.
Slower response time ( <400ms) than TN-LCD










DSTN-LCD ( Double Super Twisted Nematic LCD)
Dual STN cells



Wide temperature range


High contrast ration


LCD is thicker and heavier


High manufacturing cost 


Suitable for automative application.











FSTN-LCD( Film compensated Super Twisted Nematic LCD)
Black icons on white backgound 

Suitable for >1/16 duty cycles

Wide viewing angle than TN-LCD

Background color is neutral grey

Sharper threshold multiplexed addressing up to 1/120 duty.
High contrast and wide viewing angle for displays with a less than 1/16 duty cycle.










CSTN-LCD ( Color Super Twisted Nematic LCD)
RGB segment addressed separately 

Low transparency due to color filter

Requires a high brightness backlight











TFT LCD ( Thin film Transistor LCD )
Active matrix a-Si TFT LCD


Full color images


Fast refresh rate


       
        Technology Comparision       
Display mode Multiplex  Operating voltage (V) Contrast ration Viewing cone  Response time  Background color Cost
TN-LCD 1/4,  1/2 3~5  - 10:1  vertical   -10~35° ,  Horizontal   -35°~+35° <100ms Neutral grey low
HTN-LCD 1/8, 1/16 4~6  - 6:1  vertical   -10~35° ,  Horizontal   -40°~+40° <100ms Yellowish grey Low
STN-LCD 1/16, 1/32 5~9  - 6:1  vertical   -30~45° ,  Horizontal   -45°~+45° <400ms Yellow green or Bluish grey Medium
STN-LCD 1/64, 1/128 9~15  - 5:1  vertical   -20~35° ,  Horizontal   -45°~+45° <400ms Yellow green or Bluish grey Medium
STN-LCD 1/160 or > 15~20  - 4:1  vertical   -20~35° ,  Horizontal   -40°~+40° <400ms Yellow green or Bluish grey Medium
FSTN-LCD 1/16, 1/32 5~9  - 7:1  vertical   -30~45° ,  Horizontal   -45°~+45° <400ms Neutral grey High 
FSTN-LCD 1/64, 1/128 9~15  - 6:1  vertical   -20~35° ,  Horizontal   -45°~+45° <400ms Neutral grey High 
FSTN-LCD 1/160 or > 15~20  - 5:1  vertical   -20~35° ,  Horizontal   -40°~+40° <400ms Neutral grey High 
Color STN-LCD         <400ms Black Very high
TFT-LCD         <100ms Black Very high




        Technology Comparision       
Display mode Multiplex  Operating voltage (V) Contrast ration Viewing cone  Response time  Background color Cost
TN-LCD 1/4,  1/2 3~5  - 10:1  vertical   -10~35° ,  Horizontal   -35°~+35° <100ms Neutral grey low
HTN-LCD 1/8, 1/16 4~6  - 6:1  vertical   -10~35° ,  Horizontal   -40°~+40° <100ms Yellowish gey Low
STN-LCD 1/16, 1/32 5~9  - 6:1  vertical   -30~45° ,  Horizontal   -45°~+45° <400ms Yellow green or Bluish gey Medium
STN-LCD 1/64, 1/128 9~15  - 5:1  vertical   -20~35° ,  Horizontal   -45°~+45° <400ms Yellow green or Bluish gey Medium
STN-LCD 1/160 or > 15~20  - 4:1  vertical   -20~35° ,  Horizontal   -40°~+40° <400ms Yellow green or Bluish gey Medium
FSTN-LCD 1/16, 1/32 5~9  - 7:1  vertical   -30~45° ,  Horizontal   -45°~+45° <400ms Neutral grey High 
FSTN-LCD 1/64, 1/128 9~15  - 6:1  vertical   -20~35° ,  Horizontal   -45°~+45° <400ms Neutral grey High 
FSTN-LCD 1/160 or > 15~20  - 5:1  vertical   -20~35° ,  Horizontal   -40°~+40° <400ms Neutral grey High 
Color STN-LCD         <400ms Black Very high
TFT-LCD         <100ms Black Very high
   
  Copyright (c)2012 USA Golden Vision LLC