Abstract: A display module for a head-mounted display device includes a display assembly, an optical imaging assembly, and a virtual image location adjustment assembly. The display assembly is configured to display an image. The optical imaging assembly is configured to form a virtual image based on the image. The virtual image location adjustment assembly is configured to adjust at least one of the optical imaging assembly and the display assembly to adjust the virtual image to a target location. The virtual image location adjustment assembly adjusts the optical imaging assembly and/or the display assembly.

Abstract: This application discloses a display method and a display control apparatus. The display system includes a projection screen, the projection screen includes a transparent substrate and a liquid crystal film covering the transparent substrate, and the liquid crystal film includes a plurality of liquid crystal cells. The display method includes: obtaining a to-be-displayed image; determining a target liquid crystal cell from the plurality of liquid crystal cells based on locations of pixels in the to-be-displayed image; setting a status of the target liquid crystal cell to a scattering state, and setting a status of a non-target liquid crystal cell to a transparent state, where the non-target liquid crystal cell is a liquid crystal cell in the plurality of liquid crystal cells other than the target liquid crystal cell; and displaying a projection image of the to-be-displayed image on the target liquid crystal cell.

Abstract: 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.

Abstract: Disclosed are a TOF depth sensing module and an image generation method. The TOF depth sensing module includes an array light source, a beam splitter, a collimation lens group, a receiving unit, and a control unit. The array light source includes N light emitting regions. The collimation lens group is located between the array light source and the beam splitter. The control unit is configured to emit light. The collimation lens group is configured to perform collimation processing on beams. The beam splitter is configured to perform beam splitting processing on beams. The receiving unit is configured to receive reflected beams of a target object. By means of the TOF depth sensing module, high spatial resolution and a high frame rate can be implemented in a process of scanning the target object.

Abstract: A sensor for measuring flow speed of a fluid, comprising: a light-absorbing optical fiber having a fiber Bragg grating inscribed in the fiber; wherein light is emitted into the light-absorbing optical fiber to heat the optical fiber and the fiber Bragg grating, and when the fluid passes over the sensor, the flow speed of the fluid is determined by the rate of heat loss from the sensor, and the temperature of the sensor is determined from the wavelength shift of the central wavelength of the fiber Bragg grating.

Abstract: A sensor for measuring flow speed of a fluid, comprising: a light-absorbing optical fiber having a fiber Bragg grating inscribed in the fiber; wherein light is emitted into the light-absorbing optical fiber to heat the optical fiber and the fiber Bragg grating, and when the fluid passes over the sensor, the flow speed of the fluid is determined by the rate of heat loss from the sensor, and the temperature of the sensor is determined from the wavelength shift of the central wavelength of the fiber Bragg grating.