An adiabatic coupling phase modulation module has an optical substrate, an asymmetric adiabatic coupling polarization beam splitter and two electro-optical phase modulators. The asymmetric adiabatic coupling polarization beam splitter performs band spatial filtering on a quantum light source signal to output a light source signal of a specific wavelength band, and performs polarization spatial filtering on the light source signal of specific wavelength band to output a first orthogonal polarization direction light source signal of the specific wavelength band and a second orthogonal polarization direction light source signal of the specific wavelength band. The two electro-optical phase modulators respectively perform phase coding processes on the first orthogonal polarization direction light source signal and the second orthogonal polarization direction light source signal.

A display device includes a view angle switching module and a display module. The view angle switching module includes a first polarizer and a view angle adjustment layer. The display module and the view angle switching module are overlapped. The display module includes a display layer and a second polarizer. The view angle adjustment layer is located between the first polarizer and the second polarizer. An average degree of polarization of the first polarizer for light with a wavelength falling within a first wavelength band is less than an average degree of polarization of the second polarizer for the light with the wavelength falling within the first wavelength band. The display device may provide a privacy function and images with good image quality.

A TOF depth sensing module and image generation method are provided. The TOF depth sensing module includes a light source, a polarization filter, a beam shaper, a first optical element, a second optical element, a receiving unit and a control unit. The light source is configured to generate a beam. The polarization filter is configured to obtain a beam. The beam shaper is configured to obtain a first beam whose FOV meets a first preset range. The control unit is configured to obtain an emergent beam. The control unit is further configured to control the second optical element to deflect, to the receiving unit, a reflected beam obtained by reflecting the emergent beam. In the method, a spatial resolution of a finally obtained depth image of the target object can be improved.

A display device includes a display, an image beam shifter, and a light guiding component. The display generates an image beam. The image beam shifter receives the image beam and generates a projected image beam. The light guiding component receives the projected image beam to transport the projected image beam to different positions of a target zone in sequence. The image beam shifter projects the projected image beam to different positions of the light guiding component with time division.

Embodiments described herein relate to nanostructured trans-reflective filters having sub-wavelength dimensions. In one embodiment, the trans-reflective filter includes a film stack that transmits a filtered light within a range of wavelengths and reflects light not within the first range of wavelengths. The film stack includes a first metal film disposed on a substrate having a first thickness, a first dielectric film disposed on the first metal film having a second thickness, a second metal film disposed on the first dielectric film having a third thickness, and a second dielectric film disposed on the second metal film having a fourth thickness.

Disclosed are a display device and a driving method for a display device. The display device includes a display component and a light control component. The light control component has a plurality of light control pixels arranged in an array. Each of the light control pixels at least covers one of the display pixels. Each of the light control pixels is configured to switch between a first state and a second state. When the light control pixel is in the first state, external ambient light that has passed through the first polarizer does not change polarization state after passing through the light control pixel. When the light control pixel is in the second state, external ambient light that has passed through the first polarizer is adjusted, after passing through the light control pixel, to be linearly polarized light perpendicular to the light transmission axis of the reflective polarizer.

According to one embodiment, a display device including a display panel which displays images, a polarization axis rotation element located between the display panel and an observer, and a polarizer located between the display panel and the polarization axis rotation element, wherein the polarization axis rotation element includes a first area and a second area different from the first area, and an orientation of a first polarization axis of a first polarization component transmitted through the first area is different from an orientation of a second polarization axis of a second polarization component transmitted through the second area.

A one-way glass with switching modes includes an absorbing layer located on a weak light side, a reflecting layer located on an intense light side, and a converting layer stacked between the absorbing layer and the reflecting layer. The absorbing layer absorbs first polarized light and allows second polarized light to pass through. The reflecting layer reflects the first polarized light and allows the second polarized light to pass through. Unpolarized light incident from the weak light side or from the intense light side is respectively converted into the polarized light. During the process of gradually adjusting the converting layer from a twisted state to a vertical state, rotated angles of polarization directions of the first polarized light and the second polarized light gradually decrease.

The present disclosure provides numerous applications for the use of liquid crystal polarization gratings (LCPGs) to controllably steer light. When combined with an image sensor, light generated or reflected from different fields of view (FOV) can be steered, allowing an increase in the FOV or the resolution of the image. Further, the LCPG can stabilize the resulting image, counteracting any movement of the image sensor. The combination of LCPGs and liquid crystal waveguides (LCWGs) allows fine deflection control of light (from the LCWG) over a wild field of view (from the LCPG). Further applications of LCPGs include object tracking and the production of depth images using multiple imaging units and independently steered LCPGs. The LCPG may be used in controlling both the projection and reception of light.

Systems and methods for tracking the position of a head-mounted display (HMD) system component. The HMD component may carry a plurality of angle sensitive detectors that are able to detect the angle of light emitted from a light source. The HMD component may include one or more scatter detectors that detect whether light has been scattered or reflected, so such light can be ignored. Control circuitry causes light sources to emit light according a specified pattern, and receives sensor data from the plurality of angle sensitive detectors. The processor may process the sensor data and scatter detector data, for example using machine learning or other techniques, to track a position of the HMD component. An angle sensitive detector may include a spatially-varying polarizer having a position-varying polarizing pattern and one or more polarizer layers that together are operative to detect the angle of impinging light.