4-view parallax barrier is considered to be a practical way to solve the viewing zone issue of conventional 2-view
parallax barrier. To realize a flickerless 4-view system that provides full display resolution to each view, quadruple timedivision
multiplexing with a refresh rate of 240 Hz is necessary. Since 240 Hz displays are not easily available yet at this
moment, extra efforts are needed to reduce flickers when executing under a possible lower refresh rate. In our last work,
we have managed to realize a prototype with less flickers under 120 Hz by introducing 1-pixel aperture and involving
anaglyph into quadruple time-division multiplexing, while either stripe noise or crosstalk noise stands out. In this paper,
we introduce a new type of time-division multiplexing parallax barrier based on primary colors, where the barrier pattern
is laid like “red-green-blue-black (RGBK)”. Unlike other existing methods, changing the order of the element pixels in
the barrier pattern will make a difference in this system. Among the possible alignments, “RGBK” is considered to be
able to show less crosstalk while “RBGK” may show less stripe noise. We carried out a psychophysical experiment and
found some positive results as expected, which shows that this new type of time-division multiplexing barrier shows
more balanced images with stripe noise and crosstalk controlled at a relatively lower level at the same time.
In this paper, we propose an autostereoscopic display system based on active anaglyph parallax barrier, which provides
four viewpoints in full resolution. This system is realized with 120Hz displays and requires no special optical devices.
With the four viewpoints achieved, a smoother multi-view experience can be achieved when involving head tracking. In
addition, this system can be used for two-viewpoint autostereoscopy that allows more freedom of movement than that of
a conventional parallax barrier system. We made a prototype system with two 120Hz displays and successfully showed
four viewpoints.
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