本帖最后由 细胞海洋 于 2013-3-22 14:41 编辑 5 Q/ c2 q+ f- A4 {7 g( [ 1 y- u6 ~& M% D {0 r& U # c S$ f6 g4 V3 \4 f7 h l% Z) t$ ^4 X+ ]2 S+ zGlasses-free three-dimensional (3D) displays could 2 l9 k4 W9 [! [; T$ w' s& D, M
revolutionize areas such as data visualization, medical training and * U+ i1 X6 n6 R5 {! i6 { B
entertainment, particularly if adapted to mobile devices. Holography can provide - M0 _9 o" q/ W8 i) X: z
ideal 3D viewing but is too slow or expensive for many applications. Multiview 9 ?0 s! Q$ _; {7 ~
approaches are the alternative, exploiting various geometric optical tricks to 2 ~$ {1 O+ j7 v$ ~; a+ P
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 , r. V' |( ?; ~3 c
has developed a new multiview 3D display that is particularly well suited to 0 q+ ~1 |* y0 G# w; {7 W9 imobile devices, which require thin displays with high spatial resolution and a 6 f# e% z' H: ~8 M6 D
wide-angle view zone. Central to the new device is a set of directional grating / D/ h" w- k( r7 w8 X0 p0 P5 Lpixels, associated with different views and colours, etched on the backlight & i, r9 x9 M( Q3 ?surface. The display uses an LED-lit backlight very similar to those in use in 9 M/ a6 q) ~6 ?# Y" O. g* P
LCD screens today, and is demonstrated in action in transparent hand-held 2 L0 g! M) J- U+ h* bprototypes showing animated sequences of up to six different 200-view images at ' Z$ G" o8 R5 Y+ y0 h% Pa resolution of 127 pixels per inch. The cover image represents a 3D image from K" v" W8 e- C2 j
a passively modulated backlight. ( |) Q) o F6 F8 v( @ 9 n( p9 ^5 v. \9 H7 J; P' w/ u; K- w, | 作者: 懵懂干细胞 时间: 2013-3-21 17:39
