spacediver
2[H]4U
- Joined
- Mar 14, 2013
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http://www.journalofvision.org/content/13/7/6.full
just read through this today. Impressive piece of work (both the study and the display).
key points:
*Black levels are ridiculously impressive (0.00003725 cd/m2, and even that may have been due to ambient reflections of other sources of radiation).
*Black crush is essentially non existent (fig 7)
*Doesn't use sample and hold (fig 19). The data shown is using 60hz timing, and while each frame thus lasts 16.7ms, the actual light impulse lasts about 7.5 ms. For a comparison to lightboost and regular sample and hold LCD, see http://www.blurbusters.com/faq/60vs120vslb/ (courtesy of Mark Rejhon).
*There is a change in luminance across the screen, but it is less than the CRT and LCD that they compared it against (fig 15).
*There is a moderate luminance shift dependent upon viewing angle, but they did not measure this for CRT/LCD for comparison. (fig 13)
*There is some color shift across the screen, especially so in the green (fig 14).
Also from the article:
There's a fair amount of other stuff, but this is what I thought would interest you lot.
just read through this today. Impressive piece of work (both the study and the display).
key points:
*Black levels are ridiculously impressive (0.00003725 cd/m2, and even that may have been due to ambient reflections of other sources of radiation).
*Black crush is essentially non existent (fig 7)
*Doesn't use sample and hold (fig 19). The data shown is using 60hz timing, and while each frame thus lasts 16.7ms, the actual light impulse lasts about 7.5 ms. For a comparison to lightboost and regular sample and hold LCD, see http://www.blurbusters.com/faq/60vs120vslb/ (courtesy of Mark Rejhon).
*There is a change in luminance across the screen, but it is less than the CRT and LCD that they compared it against (fig 15).
*There is a moderate luminance shift dependent upon viewing angle, but they did not measure this for CRT/LCD for comparison. (fig 13)
*There is some color shift across the screen, especially so in the green (fig 14).
Also from the article:
We define here the viewing angle deviation as the difference between the measuring direction and the right angle to the screen, as shown in Figure 12a. Figure 13a shows the results, which indicate that as the viewing angle deviation moves from zero (i.e., at right angles to the screen), the luminance of a white, red, green, or blue target decreased monotonically. The rate of decrease of blue luminance was higher than that of other colors. When viewing the screen from 80° in the right or left direction (almost parallel to the screen), white on the screen was seen as bright cyan. We performed the same experiment using another PVM-2541 and found that the color shift is inherent in this model. Sony has announced that the successive model (PVM-2541A) will halve this color shift. However, when a very large field-of-view is required, projection onto a curved screen is likely to be a better solution than short viewing distances to a flat screen.
There's a fair amount of other stuff, but this is what I thought would interest you lot.
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