Signal Processing for Stereoscopic and Multi-View 3D Displays - Signal Processing Systems - page 10

Circular
polarization

Linear
polarization

“Shutter”
glasses

Wavelength
multiplexed

Glasses

3D
displays

Anaglyph

Other
glasses-
free
(rare)

No glasses

Passive

Parallax
barrier

Active
(tracking) Lenticular

sheet

Fig. 4 Classification of 3D displays

displays with steerable optics are named “ head position tracking displays ”, while
the ones with fixed optics are designated simply as “ multiview displays” .This
chapter follows the terminology in [ 28 ] and uses multiview display to designate
autostereoscopic displays which generate multiple images by means of fixed optics.
The classification used in this topic chapter is shown in Fig. 4 . It classifies 3D
displays from the users' point of view. For the observer, the main difference is
whether the display requires glasses or not. Thus the taxonomy in this topic chapter
has “glasses-based” or” glasses-free” as major display types. The predominant
share of 3D displays in the market is binocular stereoscopic TV sets which use
thin film transistor liquid crystal displays (TFT-LCD) for image formation and
require the observers to wear glasses. Color multiplexed anaglyph glasses are rare,
though some 3D cinemas still use wavelength multiplexed glasses [ 32 ] . The 3D TV
sets are sold either with polarized glasses (marketed as “passive”) or temporally-
multiplexed ones (marketed as “active”). The displays without glasses are separated
into two groups; binocular autostereoscopic ones mostly used in mobile devices,
and multiview displays used for outdoor advertising or (rarely) in computer setups.
As an exception, Toshiba announced a 3D TV model which uses a combination of
a multiview display and observer tracking [ 33 ] . All other types of 3D displays, for
example volumetric or holographic ones, are rare and mostly in prototype form.