| TN : Twisted Nematic |
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A type of displays which expresses linear characteristics
of light because liquid crystal molecules twisted about
90 degrees.
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| STN : Super Twisted Nematic |
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A type of displays which expresses birefringence of
light because liquid crystal molecules twisted beyond
180 degrees.
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| COB : Chip On Board |
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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.
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| COG : Chip On Glass |
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The type of connecting bump chip's pads to ITO pad's
of ITO glass for electrical connection by using anisotropic
conductive film.
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| COF : Chip On Film |
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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.
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| TAB : Tape Automated Bonding
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After attaching copper foil to base film by using adhesive,
copper foil's pads and IC's pads are electrically connected
with gold bump.
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| HTN : High Twisted Nematic
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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.
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| FSTN : Film STN |
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This displays black & white colors with retardation
film to STN LCD. The retardation film makes ellipsometric
polarized light convert to linear polarized light.
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| ETN & ESTN : Enhanced TN &
Enhanced STN |
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With liquid crystal dopped dye we can enhance the contrast
ratio in a specific wavelength. We call these LCDs "ETN
or ESTN".
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| DSTN : Double STN |
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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.
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| Gray Scale |
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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.
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| PLCD : Plastic LCD |
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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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