par "Stereophile Ultimate AV"
http://www.ultimateavmag.com/videoprojectors/207jvchd1/
en résumé comparé au Sharp XV-Z20000
plus piqué
contraste efficace moins bon (sur des scènes avec noirs trés profonds et trés hautes lumières image plus plate)
couleurs un poil trop saturées
à peu prés correctement étalonné d'usine
petit défaut d'uniformisation sur les cotés non visible sur film
convergences correctes au centre moins bonnes sur les cotés mais rattrapable en partie
prix 11500$ Sharp 6300$ HD1
et autre de nos amis Anglais :
Home Cinema Choice mag opinion on HD1
This is an extract from the Home Cinema Choice Magazine (not on-line yet but in print) courtesy of nathankemp on AVF -
"Ladies and gentlemen, you are cordially invited to join me as I explore a projector that I think could rock the world to its very foundations,
Strong words? Certainly. Over the top? You might think so. Unless, that is, like me you've seen JVC's truly remarkable DLA-HD1 projector in action...
D-ILA technology has been covered at length in previous HCCs but this is actually the first genuinely domestic projector from JVC. But rather than opt for a budget job, the brand has produced a high-end model with serious aspirations.
Design and Features
Visually, the True Black HD1 is a very striking proposition; it uses a centrally positioned lens and has a high-gloss black finish offset by a neat central grey stripe.
However, one aspect of the HD1's design that is not living room-friendly is its considerable size. Interestingly, in Japan the projector comes in a more modern gloss white finish, to suit lighter living rooms, and it would've been nice to be given the option here. Mind you, it you're ceiling mounting the unit, that probably doesn't matter and the black finish will, at least, make it less visible in the dark.
Connectivity is effective with two HDMI jacks, a component video input, an RS-232C control terminal for system integration (JVC hopes the HD1 will be a big hit with custom installation companies), and the usual S-video and composite video fallbacks.
There's no VGA input for PCs - use with a computer is only possible via OVI/HDMI. Of course, the core technology inside the HD1 is D-ILA (Direct Drive Image Light Amplification), JVC's variation on the more common Liquid Crystal on Silicon (LCoS) technology. This makes the HDl arguably closest in technological spirit to Sony's VPL-VW5O and VW100 projectors, which use a proprietary variation on LCoS, which is dubbed SXRD.
Contrast Claims
Previous D-ILA projectors have consistently impressed with their freedom from video noise, avoiding both the chicken wire/ screen door effect common with LCD technology, and the problems with motion dithering and the rainbow effect of some DIP competitors.
They've tended to be rather less impressive when it comes to black levels and colour response, however. Which is why I was rather startled to find the HD1 claiming a native contrast ratio of 15000:1. Unlike the highest contrast levels of practically all rival LCD and LCoS/SXRD projectors, this can be delivered without any iris-induced reduction in brightness.
The key to such a dazzling leap forward in black level is a combination of two innovations to the D-ILA engine. First, the latest 0.7in D-ILA device carries new ultrasmoothing technology that reduces irregularities in the liquid crystal alignment to reduce stray light. Secondly, it introduces new, next-generation liquid crystal materials and improved alignment technology to reduce the gap between liquid crystals so that light loss from the liquid crystal layer is reduced dramatically.
Even more innovative, though, is JVC's Wire Grid Optical Engine. Traditional polarising beam splitters in D-ILA (and similar) projectors use glass prisms and multi-layer interfaces, which is fine - except that these inevitably cause considerable light leakage into the lens. But the Wire Grid Optical Engine ditches the prism in favour of an inorganic reflective polarising plate. This consists of a flat glass substrate, upon which a 'cattle grid' of microscopic aluminium ribs have been deposited. These ribs produce an ultra-fine wire grid that apparently reduces the angle dependency for polarised light, so that there's less light leakage while showing dark scenes.
Naturally, the HD1 delivers Full HD 1080p resolution, which includes 24fps compatibility, and utilises Gennum's acclaimed GF9351 video processing engine. While all of these touches are undoubtedly important, I've stressed the use of the new light engine because I believe it to be the key reason why the HD1 projector is capable of producing such groundbreaking pictures.
Performance
Perhaps, the single most startling trait which characterises the HD1 is its black level. The opening battle of Star Wars: The Revenge of the Sith recorded in hi-def from Sky enjoys quite simply the most inkily black rendition of space I've ever seen at anything like the HD1's price point.
Even better, since the HD1 achieves its near-perfect black levels without any auto-iris device, there's no loss of brightness during dark shots. The stars continue to twinkle as vividly and look as phenomenally numerous as they would if watched in a real cinema, therefore, and the thousands of space craft on show lose absolutely none of their CGi lustre.
As well as helping the HD1 produce images of breathtaking dynamism during bright and dark scenes alike, the high contrast/high brightness combination helps the projector's colour range become something special too. The dazzling kaleidoscope of rich hues, metallic finishes and subtle blends that so illuminate the Revenge of the Sith's opening moments are all rendered with a precision and, particularly, a vibrancy that leaves even Sony's mighty Pearl projector looking inadequate. In fact, the HD1's colour intensity looks even better than Sony's £6k Ruby projector's, even though the Ruby uses horribly expensive £1,000 Xenon lamps while the HD1 uses just normal and much more affordable UHF illumination.
So bewilderingly impactful are the strengths reported thus far that two other talents only become noticeable upon later viewing: the image's sharpness/detail, and its freedom from noise. Regarding the former, the picture delivers every last minute pixel of Sky's exemplary Revenge of the Sith HD broadcast with pin-point accuracy, showing each drop of the 'HD' difference. Especially since the image's sharpness and clarity is entirely unsullied by seemingly any form of technology induced noise or motion blur.
Conclusion
Regardless of the unit's modest £4,500 price tag, there's really nothing disparaging to say about the HD1's performance at all. In every way it simply blows the competition away. In fact, to my eyes it delivers a Full HD performance that even gives three-chip DIP projectors something to think about, but for a fraction of the cost.
Frankly, if DLP and LCD projectors had knees, they really ought to be knocking right about now..."
Dazzer
Jean Louis
.
HS OFF
.
que mon pio seul connecté en hdmi sur le pearl.
. Chez moi la différence est encore plus flagrante sur le pearl que sur mon 1292.
