Leggendo l'imparziale recensione di HDTV test del VT50, ho notata questa parte, che sembrebbe confermare la mia ipotesi della maggiore luminosità in 3D degli LCD, addirittura dice che i nuovi Pana LCD li considerà nel insime migliori, ne usol 3D, sia per la maggiore luminosità e assenza di limiti ed acuratezza nelle sfumature che sul VT50 mostrano in 3D ulteriori limitazioni, altra cosa che no sapevo e qui andrebbe approfonditò, che in relatà i plasma Panasonic (non cita gli altri), non mantengono costante la risoluzione Full-HD in 3D, e che quando questo ciò avvine si possono notare una minore precisione, quindi alcun e scene di una certa luminosità potrebbero apparire delle seghettatura, quando il pannello cala di risoluzione , cita come esempio anche un'effetto "moire" di alcuni dettagli nella recensione del modello ST50, in una scena del bd 3D Piovono Polpette, segnalando il minuto esatto di questa scena; sempre se ho tradotto bene il Pana VT20 non aveva questi cali di risoluzione in 3D, che ne farebbe del VT20 l'unico plasma Panasonic vero 3D Full-HD costante.
Tratto dalla recensione del VT50:
"The Viera VT50 continues Panasonic’s tradition of excelling with 3D by producing images which feature exceptionally low crosstalk, resulting in very few double-image artefacts. However, we were recently more happy with the 3-dimensional images being put out by one of Panasonic’s IPS LED LCDs when it comes to 3D. Although those LED LCD TVs produce a weaker black level than the Plasma range, they produce a brighter image overall, with no panel-generated noise in the image, and no limitation on smooth gradations.
Plasma’s 3D picture quality is not at the same level as 2D (neither are most LCD televisions, for that matter). On Panasonic’s plasma-based 3D TVs, it appears that some of the light emission stages from the plasma panel are being completed with lessened precision, which results in a resolution limitation. In test patterns, resolution checks with 100% white and 100% black lines are drawn cleanly by the panel, which is probably why Panasonic still markets the product as “Full HD 3D”. However, if the difference between the lines is less, say if they are dark grey and light grey, the panel may not resolve all of the fine details and instead smudge the two greys into a single tone. We assume that this is being done to speed up the panel display process and produce a sufficiently bright 3D image – although power consumption may also be a factor.
It’s important to clarify the impact this will have on real-world 3D images. 3D resolution limitation does not – in our experience – increase crosstalk (which is caused by temporal limitations in the display, not spatial limitations), but does introduce slight jaggedness that will be revealed with movement and certain brightness combinations within the source. The only Panasonic Plasma 3D TV we reviewed that didn’t feature this was their very first tri-dimensional model, the TX-P50VT20. There is also a higher amount of dithering in the image when compared to 2D, presumably used to disguise less graceful transitions between shades (lessened gradation) when compared to 2D.
Real-world 3D content does look excellent on the 3DTV, though, even if it’s not at the jaw-dropping level of 2D quality. One of its biggest strengths is its ability to reproduce all 3D frame rates (50hz, 60hz and 24hz input) without any judder. The fast action shots in 3D Blu-ray Discs such as Tron: Legacy and How to Train Your Dragon had a real cinematic quality thanks to this."
Tratto dalla recensione del ST50:
"It turns out that the level of detail shown in 3D depends on the brightness of the lines – and we could, in fact, achieve full resolution in this area by raising the [Brightness] control (because that makes the grey in our own test pattern closer to white). We just did this for test purposes, of course, and don’t recommend anyone watches a picture with milky-grey blacks!
This means that the Panasonic 3D Plasmas represent a strange case whereby SOME shades in the picture are represented with full resolution, and others aren’t. Are some of the Plasma display’s sub-fields being drawn at half precision in order to avoid crosstalk? Or does the answer lie with power consumption: on the TX-P50VT20, the only case of a Panasonic Plasma we’ve seen that resolved full 3D resolution, we measured 3D power consumption at 333 watts, but this had dropped to 248 watts a year later in the same-sized TX-P50VT30.
How does all this pixel-peeping relate to the sharpness of real world 3D content? Fortunately, the 3D picture could never be described as blurry, but is slightly moreso than 2D. Eagle-eyed viewers can also expect to see some jaggedness during moving diagonal objects, and other highly detailed areas of the picture, since the resolution of a Full HD 3D 1080p source is greater than the panel can display. A good real-life example is the TV news scenes from Cloudy With A Chance of Meatballs, which have a faint interlaced pattern laid on top (example at 1:11:16). In the 3D mode, this displays with moiré because of the resolution limit."
In pratica le serie 30 e 50 non sono veri Full-HD 3D costanti, mentre il VT20 lo era, possibile che il vero motivo è che hanno dovuto risparmiare da qualche parte nelle performance (in questo caso nel 3D), non avrebbe senso un passo indietro del genere per risparmiare solo una manciata di watt in 3D rispetto al VT20, e nelle serie più recenti non risolvere in tutte le scene la risoluzione piena in 3D, quando il primo plasma 3D di Pana ci riusciva, invece di fare passi avanti, fanno passi indietro, a che è servito sbandierare in passato ai 4 venti che i loro plasma sono un vero Full-HD 3D, qundo poi già dall'anno scorso questa caratteristica è andata perduta ?
Nel sito ufficiale continuano a scrivere FullHD 3D, ma solo il VT20 lo è: http://www.panasonic.it/html/it_IT/Prodotti/TX-P55VT50T/Sommario/9190593/index.html?trackInfo=true