Abstract
We propose an integral three-dimensional (3D) display system with a wide viewing zone and depth range using a time-division display and eye-tracking technology. In the proposed system, the optical viewing zone (OVZ) is narrowed to a size that only covers an eye to increase the light ray density using a lens array with a long focal length. In addition, a system with low crosstalk with respect to the viewer’s movement is constructed by forming a combined OVZ (COVZ) that covers both eyes through a time-division display. Further, an eye-tracking directional backlight is used to dynamically control the COVZ and realize a wide system viewing zone (SVZ). The luminance unevenness is reduced by partially overlapping two OVZs. The combination of OVZs formed a COVZ with an angle that is ∼1.6 times larger than that of the OVZ, and an SVZ of 81.4 deg and 47.6 deg for the horizontal and vertical directions, respectively, was achieved using the eye-tracking technology. The comparison results of the three types of display systems (i.e., the conventional system, our previously developed system, and our currently proposed system) confirmed that the depth range of the 3D images in the proposed system is wider than that of the other systems.
Highlights
The integral three-dimensional (3D) display is a 3D imaging system based on integral photography proposed by Lippmann.[1]
We proposed an integral 3D display system using an eye-tracking directional backlight and a time-division display
We constructed a system with low crosstalk with respect to the movement of the viewer by combining the optical viewing zone (OVZ) for the left and right eye using time-division display to form the combined OVZ (COVZ)
Summary
The integral three-dimensional (3D) display is a 3D imaging system based on integral photography proposed by Lippmann.[1] This promising 3D display technique can potentially be applied to various fields and has been actively researched because it does not require special glasses to view the natural full-parallax images.[2,3,4,5,6,7,8,9,10,11] the viewing zone, spatial resolution, and depth range of the reconstructed 3D images are limited because the integral 3D display reconstructs a large amount of light ray information.[12,13] a system design that efficiently increases the light ray density is necessary for displaying 3D images with a wide viewing zone, high spatial resolution, and wide depth range. They are classified into three types: optical viewing zone (OVZ), combined OVZ (COVZ), and system viewing zone (SVZ). The OVZ angle θovz is expressed as Optical Engineering
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