JDI type 1 - AH-IPS (this was used for the ZU)
JDI type 2 - VA (Xperia Z/ZL leftovers)
Sharp - VA (Xperia Z/ZL leftovers)
Samsung - S-PLS (Will only be used after all the VA panels are used up)
That's proof:
1) According to gsm-arena
Contrast 1513:1
Brightness 580 cd/m²
Black level 0.38 cd/m²
This is an IPS panel like on Xperia ZU.
Verdict: Much better screen quality.
2)According to hi-tech.mail.ru
Contrast 620:1
Brightness 488 cd/m²
Verdict: same poor panel as on Xperia Z.
3) According to ixbt.com
Contrast 600:1
Brightness 460 cd/m²
Verdict: poor screen.
Pixel arrangement 100% same as on Xperia Z.
http://forum.xda-developers.com/showthread.php?t=2445283
sony爭氣點好嘛

sharp panel = 反白mon
jdc panel = 正常mon
http://forum.xda-developers.com/showthread.php?t=2451628