Μια χαρά είναι και το trustedreviews και οποιαδήποτε πηγή γνώσης, όταν υπάρχει κριτική σκέψη. Παρακάτω, μια τρίτη πηγή πάνω στο θέμα από το Projector central. Το είχα διαβάσει εν μέσω καραντίνας και ήθελα να το ποστάρω στο φόρουμ τότε, αλλά με όλα αυτά που γίνονται γύρω μας το ξέχασα εντελώς. https://www.projectorcentral.com/Projector-Resolution-Shootout-Part-1.htm , https://www.projectorcentral.com/Projector-Resolution-Shootout-Part-2.htm . Παραθέτω εν συντομία, τα αποτελέσματα κατά σειρά στα τεστ αναλυτικότητας-οπτικής οξύτητας εικόνας: 1.ο native 4k JVC DLA-NX7 , 2. ο Benq HT9060 (αν δεν απατώμαι, πρόκειται για την αμερικάνικη έκδοση του Χ12000), 3. ο Optoma uhd 60 (κλώνος-φασόν είναι και το δικό μου χρέπι), 4. ο Epson HC5050UBe , 5) ο JVC DLA-x790 , 6. ο ViewSonic X10-4K . Λείπει μοντέλο της Σόνυ, αλλά υποθέτω θα παίζει μεταξύ 2-3 θέσης.
Τα σχόλια για τους 2 dlp με 0,47" και 0,66":
The ViewSonic X10-4K has the lowest resolution of all the DLP models, as well as the lowest contrast and luminance of any model in the test. As mentioned earlier, this is the only DLP to use the smaller 0.47-inch DLP XPR imaging device with four-phase pixel-shifting. As a portable lifestyle projector, it's also the only model here not to feature the optics of a traditional long-throw home theater lens. Some combination of these differences came to bear in its test targets, which barely show any discernible fine lines (F). They are there, but at such low contrast they tend to merge into the background instead of forming a darker line from a few feet away. Vertical resolution was even lower on the target—and does not reach the claimed 2160 pixels for 4K UHD.
With all the variables at play in these projectors it's hard to draw any firm conclusions from our testing. They vary widely in imaging technologies, native resolution of the chips, the use of either two-phase or four-phase pixel shifting, their brightness and native contrast, their image processing, and their optics. Perhaps one observation we can make is that a projector like the JVC DLA-NX7, with its trio of true native 4K chips, a good lens, and high native contrast, gives the best chance of delivering the most measurable detail to the screen compared with any pixel-shifting projector. But the two-phase pixel-shifting associated with TI's 0.66-inch DLP also appeared very capable of delivering something close to the full on-screen resolution of a UHD signal if embedded in a projector with good optics and even mediocre contrast, as we saw in the BenQ HT9060.
Similarly, although the BenQ HT9060 produced the highest resolution (and luminance) of any of the DLP pixel-shifters, with high color accuracy in the Rec.709 space, its lower contrast allowed the Optoma UHD60—a projector with the same 0.66-inch chip that costs a fifth of its price—to give the Benq a real challenge in perceived sharpness at normal viewing distances. That is the key takeaway for any discussion about 4K resolution: it's not just about pixels.
Με λίγα λόγια, το 0,47" τσιπ του viewsonic γράφει ότι είναι πιο ευκρινές από 1080p, έχει όμως το πιο χαμηλό κόντραστ, δεν πληροί τις προδιαγραφές για true 4κ και εισάγει θόρυβο στην εικόνα. Αντιθέτως, ακόμα και ο φθηνός 0,66" είναι ένα κλικ κάτω από το πραγματικό 4κ. Διαβάστε όλο το άρθρο, αξίζει πραγματικά.
Τα σχόλια για τους 2 dlp με 0,47" και 0,66":
The ViewSonic X10-4K has the lowest resolution of all the DLP models, as well as the lowest contrast and luminance of any model in the test. As mentioned earlier, this is the only DLP to use the smaller 0.47-inch DLP XPR imaging device with four-phase pixel-shifting. As a portable lifestyle projector, it's also the only model here not to feature the optics of a traditional long-throw home theater lens. Some combination of these differences came to bear in its test targets, which barely show any discernible fine lines (F). They are there, but at such low contrast they tend to merge into the background instead of forming a darker line from a few feet away. Vertical resolution was even lower on the target—and does not reach the claimed 2160 pixels for 4K UHD.
With all the variables at play in these projectors it's hard to draw any firm conclusions from our testing. They vary widely in imaging technologies, native resolution of the chips, the use of either two-phase or four-phase pixel shifting, their brightness and native contrast, their image processing, and their optics. Perhaps one observation we can make is that a projector like the JVC DLA-NX7, with its trio of true native 4K chips, a good lens, and high native contrast, gives the best chance of delivering the most measurable detail to the screen compared with any pixel-shifting projector. But the two-phase pixel-shifting associated with TI's 0.66-inch DLP also appeared very capable of delivering something close to the full on-screen resolution of a UHD signal if embedded in a projector with good optics and even mediocre contrast, as we saw in the BenQ HT9060.
Similarly, although the BenQ HT9060 produced the highest resolution (and luminance) of any of the DLP pixel-shifters, with high color accuracy in the Rec.709 space, its lower contrast allowed the Optoma UHD60—a projector with the same 0.66-inch chip that costs a fifth of its price—to give the Benq a real challenge in perceived sharpness at normal viewing distances. That is the key takeaway for any discussion about 4K resolution: it's not just about pixels.
Με λίγα λόγια, το 0,47" τσιπ του viewsonic γράφει ότι είναι πιο ευκρινές από 1080p, έχει όμως το πιο χαμηλό κόντραστ, δεν πληροί τις προδιαγραφές για true 4κ και εισάγει θόρυβο στην εικόνα. Αντιθέτως, ακόμα και ο φθηνός 0,66" είναι ένα κλικ κάτω από το πραγματικό 4κ. Διαβάστε όλο το άρθρο, αξίζει πραγματικά.
