Vivement le test de HDFEVER (le seul crédible pour moi) car tout ce que je lis à propos du HU7500 ou HU8500 m'inquiète beaucoup, concernant l'uniformité du rétroéclairage.
Voilà par exemple, le retour d'un américain qui a acheté un HU7500 hier (donc écran plat, pas incurvé) et qui a un écran avec beaucoup de clouding et des fuites de lumière, même avec un backlight très bas :
Well I took the plunge and picked up the UN55HU8550 from Best Buy tonight. However after getting it unpacked and plugging everything in and after some basic calibrations, I am having my doubts about the quality of this TV. I noticed a significant amount of backlight bleeding around the edges and also a halo right in the middle of the screen. When I put in Baraka (which to me has always been my best looking blu-ray) from the opening credits the screen is black, however the TV started flashing between blackblack (as in no image) and the screen showing some backlight bleeding. I found this immediately disturbing and my heart sank. I played around with several settings including making sure the backlight was way down, along with contrast and brightness, but the strobing was still there, along with the backlight/halo.
Coming from a 46 inch Samsung that I bought in 2008, I never had this significant of an issue. I am wondering now if I am dealing with a bad set. Nonetheless I find this completely unacceptable and I plan to return the TV. Now I am debating if its even worth it and should I just go for a full refund. The reason I went for UHD, was that I wanted a larger screen and I had the money. However, now I am having some serious buyer's remorse.
Anyone else with a HU8550 notice anything peculiar during black images or particular issue with bleeding?
Et les premiers tests UK ne sont pas très bons en matière d'homogénéité :
Pour rappel, AVFORUMS donne un 7/10 (pas génial) et mentionne les problèmes de backlight même si ça peut s'arranger :
As we mentioned, there were some minor backlight uniformity issues but this could largely be addressed by using the Smart LED feature. We found that not only did the perceived blacks improve but any light patches largely disappeared. The only exception was the bottom left hand corner, where a slight light patch could still be seen on widescreen movies. However we could address this by activating the Cinema Black mode, which turns the LEDs off in the areas where the black bars are, thus eliminating this final light patch. We're glad to see that Samsung has made improvement to the Cinema Black mode and it's now a truly useful feature. Samsung's local dimming is amongst the best implemented we have seen, with deep blacks, excellent dynamic range and no perceivable loss of detail. This was evidenced by watching the notorious scene in the last Harry Potter movie where Lord Voldemort's army amasses over Hogworts. It can be a torture test for many local dimming systems but the Samsung didn't break a sweat. Since we were reviewing an early production sample of the HU8500, we would expect the backlight uniformity to be better on the units that actually ship to stores.
Quant à TECHRADAR, ils conseillent de baisser le BL en 3D car sinon, on a du clouding :
The UE65HU8500's 3D efforts aren't flawless, however. For starters the 3D picture preset pushes the backlight too hard, leading to signs of backlight clouding in dark areas. I'd recommend reducing the backlight level until such clouding disappears.
TRUSTEDREVIEWS mentionne la même chose :
First impressions of the UE65HU8500’s 3D performance are a bit mixed. Using the default settings there’s some backlight clouding over dark scenes, and areas of highly contrasting detail – such as Bilbo’s writing on the parchment at the start of The Hobbit, and any distance shots over cities or landscapes – tend to suffer with a distracting glowing halo.
Moi, ce genre de remarques m'inquiète beaucoup. Aujourd'hui, j'ai un 46F8000 et je regarde la 3D en mode Dynamique et BL au max (20). Peut-être suis-je tombé sur la perle rare mais même dans ces conditions, je n'ai AUCUN clouding. Y compris dans les scènes les plus sombres des films 3D (ex : Thor 1). Je n'ai pas du tout envie d'acheter un écran UHD à plus de 3000/4000 €, et devoir baisser le rétroéclairage en 3D au prétexte qu'il y a du clouding ! Ca serait une vraie régression.