Glossary
TN : Twisted Nematic
A type of displays which expresses linear characteristics of light because liquid crystal molecules twisted about 90 degrees.

STN : Super Twisted Nematic
  A type of displays which expresses birefringence of light because liquid crystal molecules twisted beyond 180 degrees.

COB : Chip On Board
  The type of connecting IC's pads to PCB's patterns by wire-bonding and coating them after fixing bare chip IC to PCB by using epoxy bond.

COG : Chip On Glass
  The type of connecting bump chip's pads to ITO pad's of ITO glass for electrical connection by using anisotropic conductive film.

COF : Chip On Film
  The type of connecting IC's pads to FPC(Flexible Printed Circuit) patterns and coating them by wire-bonding after fixing bare chip IC to FPC by using epoxy bond.

TAB : Tape Automated Bonding
  After attaching copper foil to base film by using adhesive, copper foil's pads and IC's pads are electrically connected with gold bump.

HTN : High Twisted Nematic
  Generally TN LCD's twisted angle is about 90 degrees. If we get more wide viewing angle, we should twist liquid crystal molecules more than 90 degrees. HTN LCD's twisted angle is from 100 to 110 degrees.

FSTN : Film STN
  This displays black & white colors with retardation film to STN LCD. The retardation film makes ellipsometric polarized light convert to linear polarized light.

ETN & ESTN : Enhanced TN & Enhanced STN
  With liquid crystal dopped dye we can enhance the contrast ratio in a specific wavelength. We call these LCDs "ETN or ESTN".

DSTN : Double STN
  With compensation LCD added to display LCD, we can enhance the characteristics of contrast and temperature but there are demerits that are thicker and heavier.

Gray Scale
  As we cannot display various information with only ON and OFF function, we need mid level between ON and OFF by properly modulating the level or the width of voltage pulse. With only ON and OFF function we can display 8 colors only but we can display many more colors applying gray scale to color LCD.
For example, in case of 16 gray scale, we can display 16©øcolors.

PLCD : Plastic LCD
  Instead of glass substrates LCD which applies flexible substrate, PC, PES and PAR etc. to is PLCD. While it is more expensive and it has reliable problems, it has a great deal of merits that are unbreakable, lighter, thinner and have no shade of image comparing with glass LCDs.
 
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