Time-multiplexed vector light field display with intertwined views via metagrating matrix

Abstract

Three-dimensional (3D) display is the future technology of display. The insufficient refreshable information provided by the screen is one of the major bottlenecks that hinders the development of light field 3D display. In this paper, a time-multiplexed vector light field display is proposed to increase the amount of information by exploiting the time redundancy. A view modulator with fully coverage of metagrating matrix is adopted to generate two groups of time-sequentially lit-up intertwined views. With a small deflection angle of incidence, the intertwined-view based time-multiplexing strategy is beneficial because of the less stray light and crosstalk, compared with the successively arranged views. Therefore, the system volume and complexity of directional backlight are reduced. In the experimental demonstration, a time-multiplexed vector light field 3D display is constructed with 18 views. The horizontal field of view reaches 51°. The potential applications include human-computer interaction, commercial exhibition, and medical hygiene.