A projection screen apparatus having a perimeter frame and a substantially blank screen is provided.

A projection screen apparatus having a perimeter frame and a substantially blank screen is provided.

A positioning program executed by a computer apparatus in a positioning system comprising: an invisible ray screen formed by invisible rays; a projection screen disposed in the vicinity of the invisible ray screen along the invisible ray screen; a projector device that projects an image onto the projection screen; a camera that detects reflected light of invisible rays by imaging the invisible ray screen; and the computer apparatus, wherein the projection screen is installed so that a part of the image projected onto the projection screen is outside angle of view of the camera, and the positioning program causes the computer apparatus to function as a locator that, in a case where a detection target object is caused to pass through the invisible ray screen, locate a passage position of the detection target object on the invisible ray screen, based on the reflected light of invisible rays detected by the camera.

One or more perforation hole pattern methods are applied (402) to generate a spatial distribution of perforation holes forming a semi-random pattern for an image display screen. The image display screen is perforated (404) with the spatial distribution of perforation holes forming the semi-random pattern. Image rendering light is emitted (406) with a light projector toward the image display screen that is installed in an image rendering environment. At least a portion of the image rendering light emitted from the light projector is reflected (408) by the image display screen, toward a viewer.

Disclosed is a polarization-dependent light steering device based wide projection display system which can extend the screen projection region of an image at low cost without lowering of resolution. A wide projection display system according to an embodiment of the present invention comprises: a projector for sequentially outputting, in a time division scheme, images to be projected to different regions on a screen; and a light steering device installed behind the projector to differently control the output directions of the images according to the polarization directions of the images. The light steering device comprises a plurality of Fresnel prism arrays having polarization dependence. The plurality of Fresnel prism arrays are stacked along the projection direction of images output from the projector.

Disclosed is a polarization-dependent light steering device based wide projection display system which can extend the screen projection region of an image at low cost without lowering of resolution. A wide projection display system according to an embodiment of the present invention comprises: a projector for sequentially outputting, in a time division scheme, images to be projected to different regions on a screen; and a light steering device installed behind the projector to differently control the output directions of the images according to the polarization directions of the images. The light steering device comprises a plurality of Fresnel prism arrays having polarization dependence. The plurality of Fresnel prism arrays are stacked along the projection direction of images output from the projector.

Based on information about a vehicle, the information can be projected and displayed onto a road surface or the like. An image projection apparatus, which projects an image, includes an acquisition unit that acquires the information about the vehicle, and an image projection unit that projects the image based on the information acquired by the acquisition unit.

An optical device includes a first optical system having an optical element, a second optical system having a lens and disposed at a reduction side of the first optical system, a first holding member holding the optical device, a second holding member holding the lens, and a movement mechanism configured to move the first holding member in optical axis directions. The optical element has a reflection surface. The first holding member has a first holding portion holding the optical element and a first coupling portion extending from the first holding portion to a second optical system side. The movement mechanism has a transport mechanism configured to move the first coupling portion along the optical axis directions, and a guide mechanism configured to guide the first holding member in the optical axis directions. The guide mechanism restricts rotation of the first holding member around the optical axis.

An optical device includes a first optical system having an optical element, a second optical system having a lens and disposed at a reduction side of the first optical system, a first holding member holding the optical device, a second holding member holding the lens, and a movement mechanism configured to move the first holding member in optical axis directions. The optical element has a reflection surface. The first holding member has a first holding portion holding the optical element and a first coupling portion extending from the first holding portion to a second optical system side. The movement mechanism has a transport mechanism configured to move the first coupling portion along the optical axis directions, and a guide mechanism configured to guide the first holding member in the optical axis directions. The guide mechanism restricts rotation of the first holding member around the optical axis.

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.