The present invention provides a projection method, equipment and system for achieving short focal length circular-screen output based on multiple optical machines. The projection method includes: setting a plurality of optical machines corresponding to one visual plane; calculating a value range of a throw ratio of the optical machines corresponding to the visual plane according to a percentage of a fusing zone formed when projection of the optical machines intersects each other and is projected to the corresponding visual plane and an expected screen ratio; obtaining setting parameters of each optical machine based on the value range of the throw ratio of each optical machine; and obtaining a spatial position and a rotation angle range for when the optical machines are projecting based on the setting parameters of the optical machines and a projection area of an optical path coverage range of the optical machines on the corresponding visual plane.

The present invention provides a projection method, equipment and system for achieving short focal length circular-screen output based on multiple optical machines. The projection method includes: setting a plurality of optical machines corresponding to one visual plane; calculating a value range of a throw ratio of the optical machines corresponding to the visual plane according to a percentage of a fusing zone formed when projection of the optical machines intersects each other and is projected to the corresponding visual plane and an expected screen ratio; obtaining setting parameters of each optical machine based on the value range of the throw ratio of each optical machine; and obtaining a spatial position and a rotation angle range for when the optical machines are projecting based on the setting parameters of the optical machines and a projection area of an optical path coverage range of the optical machines on the corresponding visual plane.

The present disclosure provides a display system comprising a retro-reflective screen having retro-reflective screen elements that reflect incident light. Each of the retro-reflective screen elements can include three intersecting planes. At least one of the three intersecting planes intersects an adjacent plane at an angle that is 90, with an offset greater than 0. The display system can further include at least one projector that projects the light onto the retro-reflective, which light characterizes an image or video. The retro-reflective screen having the retro-reflective screen elements can reflect the light at a cross-talk that is decreased by at least 10% and/or an intensity that is increased by at least 5%, as compared to a retro-reflective screen with retro-reflective screen elements having planes that each intersects an adjacent plane at an angle of 90, without the offset.

The present disclosure provides a display system comprising a retro-reflective screen having retro-reflective screen elements that reflect incident light. Each of the retro-reflective screen elements can include three intersecting planes. At least one of the three intersecting planes intersects an adjacent plane at an angle that is 90, with an offset greater than 0. The display system can further include at least one projector that projects the light onto the retro-reflective, which light characterizes an image or video. The retro-reflective screen having the retro-reflective screen elements can reflect the light at a cross-talk that is decreased by at least 10% and/or an intensity that is increased by at least 5%, as compared to a retro-reflective screen with retro-reflective screen elements having planes that each intersects an adjacent plane at an angle of 90, without the offset.

An image processing unit of the disclosure includes an imaging section that acquires a plurality of partial images as a captured image, by imaging a projection screen provided by a projector through division of the projection screen into a plurality of regions to have partially overlapping imaging regions, and an estimation section that performs an operation a plurality of times on a basis of the captured image, the operation being performed to estimate a projection transformation matrix for linking of the partial images adjacent to each other.

There is provided a three-dimensional (3D) projection system including a diffraction element having a grating pattern and a plurality of projectors that project light having image information onto the diffraction element. The diffraction element displays a 3D image at multiple viewing points by adjusting a light exit direction based on an incident angle of the light projected by each of the plurality of projectors at the grating pattern.

There is provided a three-dimensional (3D) projection system including a diffraction element having a grating pattern and a plurality of projectors that project light having image information onto the diffraction element. The diffraction element displays a 3D image at multiple viewing points by adjusting a light exit direction based on an incident angle of the light projected by each of the plurality of projectors at the grating pattern.

A multi-theater light source for two or more 3D projectors positioned in differing spaces. The apparatus includes a first light source outputting light to display left eye content, and the apparatus includes a second light source outputting light for use by the projectors to display right eye content. The apparatus includes a switching device that receives the light output from the first and second light sources and switches between first and second operating states to route the left and right eye light. In the first operating state, the switching device directs the light from the first light source toward a first projector and the light output from the second light source toward a second projector. In the second operating state, the switching device directs the light output from the first light source toward the second projector and the light output from the second light source toward the first projectors.

A multi-theater light source for two or more 3D projectors positioned in differing spaces. The apparatus includes a first light source outputting light to display left eye content, and the apparatus includes a second light source outputting light for use by the projectors to display right eye content. The apparatus includes a switching device that receives the light output from the first and second light sources and switches between first and second operating states to route the left and right eye light. In the first operating state, the switching device directs the light from the first light source toward a first projector and the light output from the second light source toward a second projector. In the second operating state, the switching device directs the light output from the first light source toward the second projector and the light output from the second light source toward the first projectors.

The present disclosure provides a display system comprising a retro-reflective screen having retro-reflective screen elements that reflect incident light. Each of the retro-reflective screen elements can include three intersecting planes. At least one of the three intersecting planes intersects an adjacent plane at an angle that is 90 with an offset greater than 0. The display system can further include at least one projector that projects the light onto the retro-reflective, which light characterizes an image or video. The retro-reflective screen having the retro-reflective screen elements can reflect the light at a cross-talk that is decreased by at least 10% and/or an intensity that is increased by at least 5%, as compared to a retro-reflective screen with retro-reflective screen elements having planes that each intersects an adjacent plane at an angle of 90 without the offset.