Absorption Effects
The state of polarization of the light traveling through the LC layer cannot be perceived by human observers, it must be converted into intensity (e.g. luminance) in order to become perceivable. This is achieved with absorption by dichroic dyes and dichroic polarizers.
| Absorption Effects | |
| internal absorption (dichroic dyes dissolved in LC), guest-host LCDs |
external dichroic polarizers |
|---|---|
| non-twisted configurations with dichroic dyes | electrically controlled birefringence, ECB |
| twisted configurations with dichroic dyes | twisted nematic field-effect, TN |
| supertwisted nematic effects, STN, the total twist is > 90° SBE (supertwisted birefringence effect) |
|
| in-plane switching effects, IPS fringe-field switching effect, FFS |
|
| vertically aligned effects, VA multi-domain vertical alignment, MVA patterned vertical alignment, PVA |
|
| PI-cell (aka OCB-cell) OCB: optically compensated bend-mode |
|
| cholesteric-nematic phase-change with dichroic dyes | |
Read more about this topic: LCD Classification
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