Stereoscopic display device
Non-luminous voxel elements form a three-dimensional space to generate 3D images for multiple viewers, addressing the challenge of group naked-eye viewing by controlling transparency and coloring, achieving clear and defined 3D imagery.
Patent Information
- Application Number
- JP2024123766
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2026-01-23
AI Technical Summary
Current devices lack the ability to display 3D images simultaneously for multiple people using the naked eye, as single-person head-mounted displays rely on eye position detection, which is impractical for group viewing.
A three-dimensional space formed by non-luminous, colored voxel elements that control transparency and coloring to generate the surface of 3D images, allowing multiple viewers to see the image without light emission, with optional light-shielding treatments.
Enables simultaneous naked-eye observation of clear, color-mixing-free 3D images by multiple people, ensuring image clarity and definition.
Abstract
Description
[Technical Field]
[0001] The device allows multiple people to simultaneously observe 3D images (including 3D videos) in a specific space using the naked eye. Summary of the Invention [Problem to be solved by the invention]
[0002] There are currently no practical devices other than single-person head-mounted displays that can display 3D images (including 3D video) within a device or a specific space generated by it so that multiple people can observe them simultaneously with the naked eye. For single-person use, there are devices that detect the eye position of the person facing the device and display an appropriate screen related to the 3D image in that direction, but this is difficult to achieve for multiple people.
[0003] The present invention provides a means for enabling a device to create a stereoscopic image (including a stereoscopic video) in a specific space and for multiple people to observe it simultaneously with the naked eye. [Means for solving the problem]
[0004] In addition to being transparent, voxel elements that are non-luminous and can take on several different colors are prepared. A large number of these are connected and combined to form a three-dimensional space area (transparent by default). Please note that this is not a two-dimensional screen, but a three-dimensional object with height, width, and depth. A three-dimensional image (not limited to a person) is formed within this space.
[0005] These voxels generally do not emit light. They are merely tinted (though there may be exceptional cases where they emit light, as will be explained later). By controlling the transparency and coloring (not emission) of the elements, only the "surface portion" of the 3D image to be displayed, as it is to be observed from the outside, is generated within the connected voxel space. In other words, rather than using elements to present a "screen" for the person viewing the 3D image, the surface portion of the 3D image is formed and reproduced within space by controlling the elements.
[0006] By not making the elements "emit light," it is possible to obtain an image without color bleeding, without the colors mixing with light emitted from nearby areas or from the opposite side of the 3D image (since the 3D image itself does not emit light, it is essential that a separate external light source be provided for illumination).
[0007] Voxel elements can be elements that can only display two types of colors: "transparent" and "single color" (or only a few colors). By bonding (combining in a three-dimensional manner) elements with different colors, it is possible to create a pseudo "transparent + multi-color" element. However, if the volume ratio of the non-colored (transparent) parts increases compared to the actual colored parts, gaps will appear on the surface of the generated three-dimensional image, and the colored parts on the opposite side of the three-dimensional image may be visible through. Measures such as painting the side of the voxel opposite the coloring direction (the outward vector of the three-dimensional image surface) gray or black to block out light (block color) will be necessary.
[0008] In this invention, the basic principle is to form and reproduce only the surface area of the 3D image that is observed using colored stripes, but the interior of the 3D image may be filled with gray, black, etc. This will make it easier to color the opposite side of the image, and to block out light and color when mixing in "light-emitting elements" as described below.
[0009] The number of colors that can be displayed by the element and the size of the element (and how small the transparent gap area is) determine the color reproducibility and apparent definition. In particular, in cases such as "presenting a conceptual model" that is not a real 3D image used in daily life, it is often not necessary to prepare such a large number of colors.
[0010] In reality, it may be possible to mix in "light-emitting" elements (naturally, there are objects in real life that emit light themselves, and you may want to express that). However, as mentioned above, light-shielding treatment is required to prevent these from adversely affecting the 3D image (on the back of the 3D image (or the entire interior) or, in some cases, near the side of the light-emitting element). [Effects of the Invention]
[0011] It can provide a three-dimensional image that can be observed by multiple people simultaneously with the naked eye.
[0012] By not emitting light (with some exceptions as mentioned above), it is possible to provide clear 3D images without color mixing. DETAILED DESCRIPTION OF THE INVENTION
[0013] Here are some usage examples:
[0014] The content source for 3D images is basically a combination of so-called "2.5D images" taken from multiple color cameras with depth sensors (essential), but depending on the application, images taken in only one direction or within a limited angle, or in black and white or infrared only, may be sufficient (the surface that is photographed can be generated in 3D, although the sides and back will be empty).
[0015] Of course, when it comes to video, it will also be possible to broadcast 3D video by shooting video (with depth information) at a frame rate that can be processed in real time.
[0016] Regarding light sources, it is basic to provide them separately outside, but as mentioned above, it seems possible to mix "light-emitting voxel elements" into the expression space, so it may also be possible to place them as lighting fixtures within the three-dimensional space.
Claims
[Claim 1] A device that connects a large number of single voxel elements, which can be transparent or non-luminous and take on several different colors, in a three-dimensional form, and displays a three-dimensional image within this transparent connected space.