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本帖最后由 细胞海洋 于 2013-3-22 14:41 编辑
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Glasses-free three-dimensional (3D) displays could
1 ~3 H0 f5 R0 K5 T" b1 s5 brevolutionize areas such as data visualization, medical training and 1 v0 R& ^4 Z. ^$ Z8 V
entertainment, particularly if adapted to mobile devices. Holography can provide 1 g. J& ] r& x9 w5 R, R
ideal 3D viewing but is too slow or expensive for many applications. Multiview
F6 \, T: Z1 s$ ~2 w% ?3 T8 Bapproaches are the alternative, exploiting various geometric optical tricks to 9 [: ?9 D& b; e- { c- {, a; z8 e7 s
create 3D images that can be viewed from many directions at the same time. A team working at Hewlett-Packard’s laboratories in Palo Alto
- d* ^, v: d. o. v Qhas developed a new multiview 3D display that is particularly well suited to
) w2 ^$ j: a$ {+ @* R Mmobile devices, which require thin displays with high spatial resolution and a % X; Q3 R) p5 q' P& x' T+ s
wide-angle view zone. Central to the new device is a set of directional grating 9 U( K0 x; U; E4 u$ c$ |% d
pixels, associated with different views and colours, etched on the backlight
: c' u! h4 b% w4 G% y# F- h' Esurface. The display uses an LED-lit backlight very similar to those in use in
' c# J) o5 I7 }# i0 H, q: WLCD screens today, and is demonstrated in action in transparent hand-held
% |! ?" a N: `4 ?5 Bprototypes showing animated sequences of up to six different 200-view images at 5 t# _& g( H2 x' _2 K8 u7 |
a resolution of 127 pixels per inch. The cover image represents a 3D image from
9 H$ o* J$ o; Ma passively modulated backlight.
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发表于 2013-3-21 17:34
发表于 2013-3-21 17:39
