Stor forskjell på PVA og A-Si?

[Keff]

Hva er egentlig forskjellen på PVA og A-Si teknologien på Samsung 245B og 244T? Kan umulig være verd det dobbelte? Litt andre små spec differanser, men alikevel. .... noen kloke svar der ute?

[nems]

LCD Panel Technology Type and Characteristics

 

TN film (Twisted Nematic)

- low manufacturing/retail costs

- restrictive viewing angles

- fast pixel response times

- dead pixels display white. Stuck pixels display RGB colors

- lower contrast levels means blacks are not as dark as VA based panels

- lower color reproduction

 

IPS (In Plane Switching)

- improved viewing angles over TN

- very good color reproduction

- slower pixel response times than TN

- dead pixels display black

- lower contrast levels means blacks are not as dark as VA based panels

 

Super-IPS (S-IPS)

- same as IPS except ...

- likely best color reproduction of all TFT

- less expensive to produce than IPS

- improved pixel response

 

VA (Vertical Alignment) Technologies

 

MVA (Multidomain Vertical Alignment)

- compromise between TN and IPS technologies

- superior color reproduction over TN but not as good as IPS

- very good viewing angles but less than IPS

- higher contrast than TN or S-IPS means very good blacks

- dead pixels are black

- slower pixel response than TN or IPS

- details can be lost when directly viewing dark areas

 

Premium-MVA (P-MVA)

- same as MVA except ...

- "overdrive" technology increases pixel response but still slower than TN

- may have slightly degraded color reproduction due to "overdrive" process

 

PVA (Patterned VA)

- same as MVA except ...

- larger viewing angles

- higher contrast levels means darkest blacks

 

Super-PVA (S-PVA)

- same as PVA except ...

- “Magic Speed” (the Samsung equivalent to Overdrive) improves pixel response

- slightly improved color reproduction

- slightly improved viewing angles

 

 

Purchasing Considerations

 

TN Gamers

Considered a "gamers" panel due to it's fast pixel response times which reduces trailing images know as "ghosting". However, this advantage has been reduced by new technologies to accelerate pixel response times in other panel types. Colors and contrast tend to be weak and blacks are not truly dark. Viewing angles are significantly limited. However, monitors based on this technology tend to be inexpensive.

 

IPS / S-IPS Graphics Work or Web Browsing

Considered to have the best color reproduction of all panel types, these panels are well suited for graphics work or web browsing. Pixel response time is also good but slower than the TN "gamers" panel. Contast and blacks are also less dark than VA panels but viewing angles are excellent.

 

MVA / P-MVA / PVA / S-PVA Compromise for All-Around Use

These panels are a compromise between the fast pixel response times of the TN panel and the excellent color reproduction of the IPS panels. Contrast and blacks are best of all the panel types. Viewing angles are similar but slightly inferior to IPS.

 

 

 

Tatt ifra denne tråden på hardforum.com : http://www.hardforum.com/showthread.php?t=1039222

[sinnaelgen]

det står ikke noe om a-si her.

jeg har lurt lit på egenskapene til den typen paneler

skjermen som jeg har syncmaster 960 BF skal etter netsidene til samsung også ha dette panelet .

hos komplett og noen andre nettbutikker står det bare at det er TF aktiv matrise.

hos samsung er det betegnet : a-si TFT/TN

Endret 10. oktober 2007 av elg-elg123

[Spectre]

245B bruker TN panel:

http://www.tftcentral.co.uk/search.php?que...mp;select=model

 

Mer info om paneltyper:

http://www.tftcentral.co.uk/articles/panel_technologies.htm

[Simen1]

a-Si er en forkortelse for amorf Silisium (amorphous Silicon på engelsk)

 

Jeg tror alle typene som er nevnt over a-Si paneler. Så vidt jeg vet er det bare knøttsmå LCD-skjermer (mobiltelefoner, søkere til digitalkameraer og bildebrikken i LCD projektorer) som bruker en annen teknologi: multikrystallinsk Silisium. mc-Si. Enkelkrystallinsk (sc-Si) er trolig for dyrt til bruk i selv små LCD-skjermer.