There are provided a video projecting structure, which is capable of having not only transparency but also high visibility of a video, a process for producing the same, and a video display system including the video projection structure. A video projecting structure includes a first transparent layer having irregularities disposed on a surface thereof, a reflective layer disposed on the surface of the first transparent layer, and a second transparent layer disposed on the reflective layer; wherein when a surface of the first transparent layer opposite to the reflective layer is defined as a reference surface, the irregularities include a plurality of slant surfaces slant to the reference surface and reflecting light from a video; wherein when a first direction, a second direction and a third direction are defined such that the first direction is perpendicular to a normal direction of the reference surface, the slant surfaces extend in the first direction, the second direction is orthogonal to the first direction, the slant surfaces are arrayed in the second direction, and the third direction is a direction in which the slant surfaces have an average slant angle θ to the reference surface in section in the second direction; the irregularities include a portion which is configured such that when an average spacing Sm.sub.1 of the irregularities in the first direction, an average spacing Sm.sub.2 of the irregularities in the second direction and an average spacing Sm.sub.3 of the irregularities in the third direction are such that Sm.sub.2>Sm.sub.1 and Sm.sub.3>Sm.sub.1 are met, and Sm.sub.2 is maximum; and wherein the irregularities include a portion which is configured such that when a frequency distribution of inclinations of the irregularities in the second direction to the reference surface is measured in 0.25° divisions in every distance of 1 mm in order that the frequencies are represented as distances, the absolute value of a median value in the frequency distribution is a value other than 0°.

There are provided a video projecting structure, which is capable of having not only transparency but also high visibility of a video, a process for producing the same, and a video display system including the video projection structure. A video projecting structure includes a first transparent layer having irregularities disposed on a surface thereof, a reflective layer disposed on the surface of the first transparent layer, and a second transparent layer disposed on the reflective layer; wherein when a surface of the first transparent layer opposite to the reflective layer is defined as a reference surface, the irregularities include a plurality of slant surfaces slant to the reference surface and reflecting light from a video; wherein when a first direction, a second direction and a third direction are defined such that the first direction is perpendicular to a normal direction of the reference surface, the slant surfaces extend in the first direction, the second direction is orthogonal to the first direction, the slant surfaces are arrayed in the second direction, and the third direction is a direction in which the slant surfaces have an average slant angle θ to the reference surface in section in the second direction; the irregularities include a portion which is configured such that when an average spacing Sm.sub.1 of the irregularities in the first direction, an average spacing Sm.sub.2 of the irregularities in the second direction and an average spacing Sm.sub.3 of the irregularities in the third direction are such that Sm.sub.2>Sm.sub.1 and Sm.sub.3>Sm.sub.1 are met, and Sm.sub.2 is maximum; and wherein the irregularities include a portion which is configured such that when a frequency distribution of inclinations of the irregularities in the second direction to the reference surface is measured in 0.25° divisions in every distance of 1 mm in order that the frequencies are represented as distances, the absolute value of a median value in the frequency distribution is a value other than 0°.

The present invention relates to display systems that use materials made from various arrangements of lenses and other optical materials. Careful design and use of these materials can be used to achieve display systems with many desirable visual effects having applicability in image and video displays, virtual reality, immersive environments, as well as in architecture, art, entertainment, and interactive systems.

The present invention relates to display systems that use materials made from various arrangements of lenses and other optical materials. Careful design and use of these materials can be used to achieve display systems with many desirable visual effects having applicability in image and video displays, virtual reality, immersive environments, as well as in architecture, art, entertainment, and interactive systems.

Provided is a projection screen, the taper angles of a plurality of triangular pyramid units arranged in an array are designed to gradually change according to a predetermined relationship, so that the image light emitted from the projector is reflected by a microstructure layer with a triangular pyramid unit and then converges to a range centered on the human eye, which reduces the difference in brightness at different viewing positions, so as to ensure that the projection screen has high brightness uniformity and high gain.

The present invention provides a diffuser plate in a simple structure capable of achieving optical properties with less luminance irregularity and color irregularity and good quality of appearance. A diffuser plate is a diffuser plate where a plurality of microlenses are placed on a principal surface, shapes of the plurality of microlenses along a cross-section perpendicular to the principal surface are different from one another and do not have an axis of symmetry. A method for designing the diffuser plate includes steps of determining a specific reference microlens; placing the reference microlens on the principal surface; forming a specific phase modulation shape; and determining a shape of the plurality of microlenses by combining the specific reference microlens and the specific phase modulation shape.

The present invention provides a diffuser plate in a simple structure capable of achieving optical properties with less luminance irregularity and color irregularity and good quality of appearance. A diffuser plate is a diffuser plate where a plurality of microlenses are placed on a principal surface, shapes of the plurality of microlenses along a cross-section perpendicular to the principal surface are different from one another and do not have an axis of symmetry. A method for designing the diffuser plate includes steps of determining a specific reference microlens; placing the reference microlens on the principal surface; forming a specific phase modulation shape; and determining a shape of the plurality of microlenses by combining the specific reference microlens and the specific phase modulation shape.

A transparent screen includes a plurality of transparent plates arranged in a front-rear direction; and a screen main body, interposed between the transparent plates, configured to display video images projected from a front side or a rear side of the transparent screen to a user on the front side, and enable a rear background to be visually recognized by the user. In a cross section orthogonal to a part of an outer edge of the transparent screen, the transparent screen has a curved shape, and a length of a center line in a plate thickness direction of the transparent plate on an external side of the screen main body in a curvature radius direction of the curved shape is greater than a length of a center line of the transparent plate on an internal side of the screen main body.

Disclosed are a refractive optical screen and a floating hologram system using the same. The refractive optical screen is a refractive optical screen which refracts incident light beams and adjusts a travelling direction of the light beams, and includes a prism array in which a plurality of prisms refracting one or more light beams toward a viewing direction of a viewer located at the front side of the refractive optical screen is arranged in a line, and one or more virtual images generated by the one or more refracted light beams simultaneously form a floating hologram arranged in the viewing direction.

A projection screen includes a substrate with a first substrate surface. The first substrate surface includes a first region and a second region adjacent to the first region. Multiple first wire grid bodies extending in a first direction are provided in the first region. Multiple second wire grid bodies extending in the first direction are provided in the second region. Each first wire grid body includes a first contact surface connected to the substrate and a first surface, and a first angle is formed therebetween. The first angles gradually decrease in a direction from the first region to the second region. Each second wire grid body includes a second contact surface connected to the substrate and a third surface, and a third angle is formed therebetween. The third angles gradually increase in a direction from the first region to the second region.