Beihang University

Microsoft Technology Licensing, LLC

Sichuan University

Qionghua Wang

Di Wang

Yilong Li

Chao Liu

Zheng Chen

Jian-Tao Sun

Jian Hu

Qian Huang

Jianmin Wu

Christoph Ponath

Ling Bao

Zhaosong Li

Sai Li

Fan Chu

Nannan Li

Ling Luo

Huan Deng

Hui Ren

Min Zhao

Disclosed is a large-depth metasurface polarization holographic 3D display method, including: performing calculations for a first 3D object and a second 3D object based on an angular spectrum diffraction theory to obtain a first metasurface hologram and a second metasurface hologram; performing interleaved row-by-row insertion of the first and the second metasurface holograms to encode into a synthetic hologram, optimizing phases of the synthetic hologram by using an error diffusion algorithm to obtain phase information required by metasurface structures, that is, meta-phase information; designing the metasurface structures based on the meta-phase information, and making a metasurface structure in odd rows sensitive to left-handed circularly polarized light, and a metasurface structure in even rows sensitive to right-handed circularly polarized light to achieve independent control over different polarization states; and performing holographic 3D reconstruction by illuminating the metasurface structures with laser.

Large-depth metasurface polarization holographic 3D display method

A holographic 3D display system based on virtual array splicing of a spatial light modulator includes a laser configured to generate a coherent light beam, first, second and third beam splitters, first and second reflectors, a shutter array, a spatial filter array, a solid lens, first and second light beam deflection elements and a spatial light modulator. The first and second beam splitters and the first reflector are configured to split the light beam generated by the laser into three parallel light beams to irradiate the shutter array. The shutter array is configured to control the three parallel light beams to sequentially pass therethrough according to a set time sequence. The three parallel light beams passing through the shutter array are expanded and collimated by the spatial filter array and the solid lens to form three parallel light beams with the same size and uniform intensity.

Holographic 3D display system based on virtual array splicing of spatial light modulator

A tunable-liquid-crystal-grating-based holographic true 3D display system comprises a laser, a filter, a beam expander, a semi-transparent semi-reflective mirror, a spatial light modulator, a lens I, a diaphragm, a tunable liquid crystal grating, a polaroid, a signal controller, a lens II and a receiving screen. The laser, the filter and the beam expander are used for generating collimated incident light. The spatial light modulator is loaded with a hologram of a 3D object. The diaphragm is positioned behind the lens I for eliminating a high-order diffracted light in the holographic true 3D display. The tunable liquid crystal grating is located on the back focal plane of the lens I and on the front focal plane of the lens II, and the signal controller is used for synchronously controlling the voltage of the tunable liquid crystal grating and the generation and loading of the hologram.

Tunable liquid crystal grating-based holographic true 3D display system and method

As disclosed herein, a desktop 3D display system is provided. A 2D image display module is used for receiving and displaying an integral imaging source. A viewing angle guide module is used for guiding light emitted from the integral imaging source. A light modulation module is arranged for modulating the light guided by the viewing angle guide module and reconstructing a 3D image. A rotation module is configured to enable synchronous rotation of the 2D image display module, the view angle guide module and the light modulation module, wherein. A rotation angle speed of the synchronous rotation is associated with the switching speed of the integral imaging source of the 2D image display module. For a 3D image reconstructed in a single visual area range, crosstalk created by the diffuse reflective feature of pixels on a 3D image in other visual areas can be eliminated, thereby improving the viewing experience.

Desktop 3D display system and display method

A method of ranking a plurality of products includes obtaining a numerical user score for each of the plurality of products, calculating an opinion score for each of the plurality of products for which a written comparison sentiment applies, determining a final score by combining the numerical user rating and the opinion score for each of the plurality of products, and ranking the plurality of products based on the final score. The opinion score is derived from one or more written comparison sentiments containing a first product name and a second product name. In another aspect, a computer readable medium has instructions stored thereon which, when executed, cause a computer to perform a method of ranking a plurality of products including at least a first product and a second product.

Ranking products by mining comparison sentiment

Growing community of inventors

Beijing, China

Qionghua Wang