dynamic scattering mode liquid crystal display
E721627
The dynamic scattering mode liquid crystal display is an early type of LCD technology that uses electric fields to induce turbulent light-scattering in liquid crystals, enabling low-cost, reflective electronic displays.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
display technology
ⓘ
electro-optic device ⓘ liquid crystal display ⓘ |
| advantageOver | light-emitting displays in low power reflective applications of its era ⓘ |
| applicationDomain |
consumer electronics
ⓘ
portable battery-powered devices ⓘ |
| basedOn |
electrohydrodynamic instability in nematic liquid crystals
ⓘ
formation of dynamic scattering domains under electric field ⓘ |
| category |
non-emissive display
ⓘ
reflective flat-panel display ⓘ |
| contrastMechanism | multiple scattering of incident light by turbulent liquid crystal domains ⓘ |
| controls | light transmission by switching between clear and scattering states ⓘ |
| developedIn | 1960s ⓘ |
| drivingScheme | segment-addressed passive matrix ⓘ |
| energySource | electrical power ⓘ |
| governedBy |
electrohydrodynamic effects in liquid crystals
ⓘ
ionic conduction in nematic liquid crystals ⓘ |
| hasProperty |
analog gray-level response possible by varying drive voltage
ⓘ
bistable only to a limited extent ⓘ grainy or cloudy appearance in the ON state ⓘ low-cost ⓘ passive-matrix compatible ⓘ reflective ⓘ relatively high power consumption compared to later LCD modes ⓘ relatively low contrast compared to twisted nematic LCDs ⓘ requires relatively high driving voltage ⓘ viewable under ambient light ⓘ |
| historicalRole |
one of the first commercially successful LCD technologies
ⓘ
pioneered use of liquid crystals in mass-market displays ⓘ |
| limitation |
limited lifetime due to electrochemical degradation of liquid crystal material
ⓘ
poor sunlight contrast compared to later LCD modes ⓘ relatively slow response time compared to modern LCDs ⓘ |
| operatesBy |
inducing turbulent light scattering in liquid crystals with an electric field
ⓘ
modulating light through field-induced dynamic scattering rather than polarization rotation ⓘ |
| predecessorOf | twisted nematic liquid crystal display ⓘ |
| replacedBy | twisted nematic LCD technology in most applications ⓘ |
| requires | threshold electric field to initiate dynamic scattering ⓘ |
| usedIn |
early digital watches
ⓘ
early electronic calculators ⓘ early portable electronic instruments ⓘ |
| uses |
AC driving voltage to avoid ionic buildup
ⓘ
dynamic scattering mode ⓘ nematic liquid crystals ⓘ thin layer of nematic liquid crystal between glass substrates ⓘ transparent electrode plates ⓘ |
| visualEffect |
milky or opaque appearance in the ON state
ⓘ
transparent or nearly clear appearance in the OFF state ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.