Fei Wu

Low aperture ratio is a problem in the conventional dual-view integral imaging (DVII) display using a point light source array. A high-aperture-ratio DVII display using a gradient width point light source array is reported in this work. The elemental Images 1 and 2, which are alternatively aligned on a liquid crystal panel, are illuminated by the light rays emitted from an assigned point light source. The optical path is optimized by optimizing the widths of the point light sources. The aperture ratio of the proposed DVII display was demonstrated as 1.88 times the conventional DVII display. Experiments showed that the vertical viewing range is related to the vertical width of the first row point light source, whereas the aperture ratio is related to the vertical widths of all point light sources. By optimizing the widths of the point light sources, the aperture ratio is enhanced without loss of viewing range.

A decision-free downsampling method (DFDS) assisted by channel-transfer information for phase-modulated holographic data storage is proposed. DFDS is used to address the issue of the accumulation of decision errors induced by traditional downsampling. The issue degrades the downsampling accuracy. DFDS comprises two functional segments: acquiring the channel-transfer information offline and performing decision-free downsampling online. With the assistance of the channel-transfer information, DFDS uses Bayesian posterior probabilities instead of traditional decision results to avoid the accumulation of decision errors and achieve more accurate downsampling. The simulation and experimental results show that DFDS reduces the phase error rate, thereby improving the reliability of the holographic data storage system.

A dual‐view one‐dimensional integral imaging display using parallax barrier is proposed. It is composed of a display panel, a parallax barrier, a polarized array, and two pairs of polarized glasses. The polarized array consists of two kinds of orthogonal polarized units that are alternately aligned. Two kinds of elemental images are aligned to the corresponding polarized units, respectively. The lights emitted from two kinds of elemental images are, respectively, modulated by the corresponding slits and polarized units, and two three‐dimensional (3D) images are simultaneously reconstructed in the viewing zone. Two pairs of orthogonal polarized glasses are introduced to separate two reconstructed 3D images. Only one of the two reconstructed 3D images is seen by wearing either pairs of polarized glasses. An experimental setup was developed, and the viewing angle of the dual‐view one‐dimensional integral imaging display is proportional to the aperture width of the slit. The restriction between the viewing angle and the optical efficiency is resolved in the proposed dual‐view one‐dimensional integral imaging display.

A dual‐view 3‐D display with multiple resolutions is proposed. The proposed 3‐D display consists of a 2‐D display panel and a parallax barrier. The parallax barrier can project the parallax image on the 2‐D display panel into views and form several viewing zones. By making viewing zones overlapping, the proposed 3‐D display can improve the resolution of the image in the overlapped area and provide multiple resolutions. Finally, the resolution is improved at the center area of a viewing zone, where there is high‐probability viewing position of the observers. A prototype is developed to verify the principle. The experimental results show that the proposed 3‐D display can improve resolution.

We propose a wide‐viewing integral imaging display. It consists of an organic light‐emitting diode, a barrier array, and a liquid crystal panel. The organic light‐emitting diode generates the rectangular light sources, and the liquid crystal panel displays the elemental images. The barriers are introduced to separate adjacent rectangular light sources and corresponding elemental images. Lights emitting from the rectangular light sources only illuminate the corresponding elemental images. The horizontal viewing angle and the luminance are both enhanced by increasing the horizontal width of the point light source. A prototype of the proposed integral imaging display is developed, and the experiment results agree well with the theory.

We propose a dual‐view integral imaging display based on point light sources. The proposed dual‐view integral imaging display is composed of an organic light‐emitting diode and a liquid crystal panel. The point light sources are displayed on the organic light‐emitting diode. The elemental images 1 and 2, which are captured from three‐dimensional scenes 1 and 2, are alternatively aligned on the liquid crystal panel in the horizontal direction. Two adjacent elemental images 1 and 2 are coupled and corresponded to one point light source. The coupled elemental images 1 and 2 are illuminated by the corresponding point light source. It satisfies the practical applications that the viewing zones are respectively located at the left and right of the proposed dual‐view integral imaging display. A prototype of the proposed dual‐view integral imaging display is developed, and good verifying results are obtained.