Disclosed are a holographic display method and a holographic display device. The holographic display method includes: acquiring an area of Nth diffraction order corresponding to an eye position; according to the area of Nth diffraction order, calculating a holographic complex amplitude distribution corresponding to a window of Nth diffraction order to obtain window hologram information, a function of the holographic complex amplitude distribution being expressed by C(m, n)=A(m, n)*exp[i(m, n)/N]; encoding the window hologram information; and according to the encoded window hologram information, loading the encoded window hologram information in the area of Nth diffraction order to display a hologram.

Techniques for displaying an input image in improved perceived resolution are described. In one aspect, a circuit is designed to include a set of memory cells, a horizontal decoder and a vertical decoder. An input image is received at an interface to the memory, the input is expanded into two separate frames in the memory, where the size of each of the two frames is identical to that of the input image. Image data in at least one of the two frames are modulated in amplitude and/or in phase. The first and second frames are then read out or displayed alternatively at twice the refresh rate originally set for the input image to achieve the perceived resolution.

A method of computing a hologram for reconstructing an object using a display device. The display device enables a holographic reconstruction of the object. The display device includes a light source and an optical system to illuminate a hologram-bearing medium being encodable with the hologram. The method includes the steps of: (a) computing the hologram by determining the wavefronts at an approximate observer eye position that would be generated by a real version of the object to be reconstructed; and (b) encoding the computed hologram in the hologram-bearing medium.

The present invention relates to a device for combining light beams which interact with adjacently arranged pixels of a light modulator. The present invention furthermore relates to a device for beam combination and to a spatial light modulation device for complex-valued modulation. The invention relates to a device for beam combination, and to an optical arrangement of polarization-sensitive component parts which allows complex-valued modulation of a light field by means of a phase-modulating light modulator and a beam combiner, which is insensitive to changes in the incidence direction of the illumination wave. This document furthermore also relates to various arrangements of reflectively operating light modulators.

There is provided a holographic projector comprising a hologram engine and a controller. The hologram engine is arranged to provide a hologram comprising a plurality of hologram pixels. Each hologram pixel has a respective hologram pixel value. The controller is arranged to selectively-drive a plurality of light-modulating pixels so as to display the hologram. Displaying the hologram comprises displaying each hologram pixel value on a contiguous group of light-modulating pixels of the plurality of light-modulating pixels such that there is a one-to-many pixel correlation between the hologram and the plurality of light-modulating pixels.

Techniques for displaying an input image in improved perceived resolution are described. In one aspect, a circuit is designed to include a set of memory cells, a horizontal decoder and a vertical decoder. An input image is received at an interface to the memory, the input is expanded into two separate frames in the memory, where the size of each of the two frames is identical to that of the input image. Image data in at least one of the two frames are modulated in amplitude and/or in phase. The first and second frames are then read out or displayed alternatively at twice the refresh rate originally set for the input image to achieve the perceived resolution.

A reflective holographic display apparatus and a display method thereof are provided. The reflective holographic display apparatus includes a front light source module, a display panel and a phase plate. The front light source module is configured to provide reference lights; the display panel is configured to adjust amplitude information of the reference lights, wherein the display panel includes a reflective layer and the front light source module is located at a light exit side of the display panel; and the phase plate is configured to adjust phase information of the reference lights and located at a light exit side of the reflective layer.

The present disclosure relates to the field of display technology and provides an addressing method of a spatial light modulator, a holographic display device and a control method thereof, which can simplify the addressing process of the spatial light modulator. The addressing method of the spatial light modulator comprises the steps of: dividing the spatial light modulator to obtain one or more modulation regions, each modulation region comprising M loading subregions, and each loading subregion comprising at least one pixel unit, wherein M2, and M is a positive integer; and addressing one loading subregion of each modulation region within a frame so as to load holographic data of a frame of a hologram to all the pixel units of all the addressed loading subregions.

The present invention relates to a device for combining light beams which interact with adjacently arranged pixels of a light modulator. The present invention furthermore relates to a device for beam combination and to a spatial light modulation device for complex-valued modulation. The invention relates to a device for beam combination, and to an optical arrangement of polarization-sensitive component parts which allows complex-valued modulation of a light field by means of a phase-modulating light modulator and a beam combiner, which is insensitive to changes in the incidence direction of the illumination wave. This document furthermore also relates to various arrangements of reflectively operating light modulators.

Architecture and designs of modulating both amplitude and phase at the same time in spatial light modulation are described. According to one aspect of the present invention, light propagation is controlled in two different directions (e.g., 0 and 45 degrees) to perform both amplitude modulation and phase modulation at the same time in liquid crystals. In one embodiment, a mask is used to form a pattern, where the pattern includes an array of alignment cells or embossed microstructures, a first group of the cells are aligned in the first direction and a second group of the cells are aligned in the second direction. Depending on applications, two cells from the first group and the second group may correspond to a single pixel or two neighboring pixels, resulting in amplitude modulation and phase modulation within the pixel or within an array of pixels.