Low-crosstalk 3D display with arc-shaped viewpoint distribution based on a composite aperture

A low-crosstalk 3D display with arc-shaped viewpoint distribution based on a composite aperture (CA) is proposed. The proposed 3D display consists of a light source, a liquid crystal display (LCD) panel, a CA, and a parallax barrier. The light source provides the necessary light energy for the display, while the LCD panel generates synthetic parallax images. The CA is composed of several aperture element arrays stacked together, arranging the elements in three orthogonal directions. Each aperture element array can switch between two states. One is the aperture state, and the other is the fully transparent state. The element in the aperture state defines the pixel position. Due to the 3D distribution of elements, the CA can convert the 2D pixel distribution on the LCD panel into a 3D distribution. These pixels with 3D distribution can be further optimized into an arc-shaped distribution, resulting in viewpoints with the same distribution. The viewpoints with arc-shaped distribution align better with human viewing habits because observers usually face the center of a 3D display device and make the right and left eyes have a different viewing distance. A prototype of the proposed 3D display is developed. The experimental results show that the viewpoints exhibit an arc-shaped distribution, with crosstalk maintained at a low level.