3D display device that reduces visual fatigue and dizziness

Abstract

Provided is a 3D display device that reduces visual fatigue and dizziness. The 3D display device according to an embodiment of the present invention comprises: a plurality of transparent display panels arranged along a depth direction; a generation unit that generates a plurality of depth screens from a 3D image; and a display unit that displays the generated depth screens on the transparent display panels, respectively, wherein the generation unit generates the depth screens such that the depth perception of an observer coincides with an actual focus position. Accordingly, visual fatigue and dizziness can be reduced by preventing the occurrence of a vergence-accommodation conflict by matching the depth felt by a person with the actual focus position.

Description

3D display device that improves visual fatigue and dizziness

[0001] The present invention relates to a 3D display device, and more particularly, to a structure of a 3D display device and a 3D display method that do not cause or cause less visual fatigue and dizziness.

[0002] When viewing a three-dimensional screen, the eye focus position based on the perceived depth may differ from the actual position on the screen. In this case, the viewer attempts to focus toward the corresponding depth while experiencing the three-dimensional effect.

[0003] Figure 1 illustrates focusing on a specific point on the screen to examine it in detail. Because the perceived depth causes the focus to shift further back, the detail is lost. Therefore, the person refocuses on the original screen. Then, to focus again, the person moves back to the screen, then back to the original screen, and so on. This process repeats.

[0004] This process, also known as "runaway," occurs repeatedly and unconsciously in brief bursts, causing visual fatigue and dizziness. While the image shown in Figure 1 is focused behind the screen, the same holds true for images focused in front of the screen.

[0005] This phenomenon occurs frequently in stereoscopic images, which are divided into L (left) and R (right) images, but can also occur on large, immersive displays. Since actual 3D graphics screens are 3D space projected onto the screen in 2D, when a person views a 2D image and interprets it as 3D, focusing on that distance to see it, the image will not be seen properly.

[0006] Therefore, 3D graphics displays can also experience overshoot, especially on large, immersive displays or when objects overlap each other, creating a strong sense of depth. However, single-sided displays fundamentally cannot address the depth difference issue.

[0007] The present invention has been devised to solve the above problems, and the purpose of the present invention is to provide a 3D display device and method that display a 3D image with a sense of depth through a plurality of transparent display panels arranged along the depth direction (degree of depth perception) as a solution to the visual fatigue and dizziness that occur when watching a 3D display.

[0008] According to one embodiment of the present invention for achieving the above object, a 3D display device includes: a plurality of transparent display panels arranged along a depth direction; a generation unit for generating a plurality of depth screens from a 3D image; and a display unit for displaying the generated depth screens on each of the transparent display panels; wherein the generation unit generates the depth screens so that the depth perception of an observer and an actual focus position are consistent.

[0009] When displaying a frustum culling through transparent display panels in a 3D image space, the frustum's specifications can be determined according to the specifications of the transparent display panels.

[0010] The near depth of the frustum may be the depth of the transparent display panel with the shallowest depth, the far depth of the frustum may be the depth of the transparent display panel with the deepest depth, the near plane of the frustum may be inside the transparent display panel with the shallowest depth, and the far plane of the frustum may be inside the transparent display panel with the deepest depth.

[0011] The display unit can set the brightness of the depth screen to be proportional to the depth.

[0012] A 3D display device according to an embodiment of the present invention may further include an adjustment unit for adjusting the respective intervals of transparent display panels along the depth direction.

[0013] The adjustment unit can adjust the spacing between each transparent display panel according to the user's settings. The adjustment unit can adjust the spacing between each transparent display panel differently.

[0014] The control unit can adjust the spacing between the transparent displays so that a specific space within the 3D graphics space has a higher depth resolution than other spaces. The specific space may be a near space or a space of interest.

[0015] A 3D display method according to another embodiment of the present invention includes the steps of: generating a plurality of depth screens from a 3D image; and displaying the generated depth screens on each of a plurality of transparent display panels arranged along a depth direction; wherein the generating step generates the depth screens so that the depth perception of an observer and an actual focus position are consistent.

[0016] A 3D display device according to another embodiment of the present invention comprises a plurality of transparent display panels arranged along a depth direction, wherein a plurality of depth screens generated from a 3D image are respectively displayed on the transparent display panels, and the depth screens are generated so that the depth perception of an observer and an actual focus position are consistent.

[0017] A 3D display method according to another embodiment of the present invention comprises the steps of: obtaining a plurality of depth screens; and displaying the obtained depth screens on each of a plurality of transparent display panels arranged along a depth direction; wherein the depth screens are generated such that the depth perception of an observer and an actual focus position are consistent from a 3D image.

[0018] As described above, according to embodiments of the present invention, by displaying a 3D image with a sense of depth through a plurality of transparent display panels arranged along the depth direction, the sense of depth felt by a person and the actual focus position are aligned, thereby eliminating the occurrence of the runaway phenomenon and improving visual fatigue and dizziness.

[0019] In addition, according to embodiments of the present invention, when displaying depth screens on each transparent display panel, the screen brightness is set higher for screens with deeper depth and the screen brightness is set lower for screens with shallower depth, so that when viewed from the front, all depth screens are observed with similar brightness, thereby improving the realism of 3D stereoscopic images.

[0020] In addition, according to embodiments of the present invention, the spacing between the transparent display panels along the depth direction can be variably and adaptively adjusted to the depth screens, thereby increasing the depth resolution for a near space, a main space, a space desired by the user, etc.

[0021] Figure 1 is an example of a conventional 3D display device;

[0022] Figure 2 is a basic concept of a 3D display device according to an embodiment of the present invention;

[0023] Figure 3 is a configuration of a 3D display device according to one embodiment of the present invention;

[0024] Figure 4 shows the depth screens displayed on each transparent display panel.

[0025] Figure 5 shows the number of transparent display panels controlled.

[0026] Figure 6 shows the brightness settings of the depth screens displayed on each of the transparent display panels.

[0027] Figure 7 is a configuration of a 3D display device according to another embodiment of the present invention;

[0028] Figure 8 is an example of adjusting the spacing between transparent display panels.

[0029] Hereinafter, the present invention will be described in more detail with reference to the drawings.

[0030] An embodiment of the present invention proposes a 3D display device capable of alleviating visual fatigue and dizziness. This technology displays 3D stereoscopic images by arranging multiple transparent display panels in multiple layers along the depth direction (degree of depth perception) so that the perceived depth and actual focus position are aligned.

[0031] The problem of overshoot, which causes visual fatigue and dizziness, can only be solved if the focus and actual image are in real space. To achieve this, as shown in Figure 2, instead of the existing method using a single display (left), a method using multiple displays is used, displaying the screen at a given depth on the display positioned at that depth (right). Since the rear display must be transparent, a transparent display panel is used.

[0032] FIG. 3 is a diagram illustrating a configuration of a 3D display device according to an embodiment of the present invention. As illustrated, the 3D display device according to an embodiment of the present invention is configured to include a 3D image acquisition unit (110), a depth screen generation unit (120), a depth screen display unit (130), and a multilayer display panel (140).

[0033] The multilayer display panel (140) is a transparent display panel structured along the depth direction illustrated on the right side of Fig. 2. A near-range image is displayed on a transparent display panel positioned at a shallow depth of field, and a far-range image is displayed on a transparent display panel positioned at a deep depth of field.

[0034] The 3D image acquisition unit (110) functions as a 3D stereoscopic image source. The 3D image acquisition unit (110) can be implemented as a storage medium capable of storing 3D stereoscopic images and a communication means capable of downloading 3D stereoscopic images via a network.

[0035] The depth screen generation unit (120) generates a plurality of depth screens from a 3D stereoscopic image acquired by the 3D image acquisition unit (110), and generates the depth screens so that the observer's sense of depth and the actual focus position match.

[0036] The number of depth screens generated by the depth screen generation unit (120) is the same as the number of transparent display panels constituting the multilayer display panel (140). The depth screen display unit (130) displays the depth screens generated by the depth screen generation unit (120) on each of the transparent display panels.

[0037] A situation in which depth screens generated by a depth screen generation unit (120) are displayed on transparent display panels by a depth screen display unit (130), i.e., a situation in which a 3D stereoscopic image is played on a 3D display device, is exemplified in Fig. 4. As illustrated, the observer's sense of depth and the actual focus position for each depth screen are consistent.

[0038] Meanwhile, when performing frustum culling to create a 3D stereoscopic image to be displayed through a multi-layer display panel (140), the frustum specifications are determined according to the structure and specifications of the transparent display panels.

[0039] Specifically, the near depth of the frustum should be set to be the depth of the transparent display panel with the shallowest depth, the far depth of the frustum should be set to be the depth of the transparent display panel with the deepest depth, the near plane (x, y, width, height) of the frustum should be set to be the inside of the transparent display panel with the shallowest depth, and the far plane (x, y, width, height) of the frustum should be set to be the inside of the transparent display panel with the deepest depth.

[0040] The transparent display panels of the 3D display device illustrated in Fig. 4 are composed of four, so that the depth of the 3D image can be expressed by dividing it into four levels. However, the number of transparent display panels is merely exemplary, and the number of transparent display panels can be changed depending on the specifications and purpose of the 3D stereoscopic image.

[0041] Considering 3D computer graphics technology, the number of transparent display panels is 2 as shown in Fig. 5. n It is recommended to implement it with dogs (4, 8, 16, ...). In computer graphics technology, the concept of a depth buffer (Z-buffer) is used for 3D space, and the depth buffer is usually used as 8 bits, 16 bits, or more. 8 bits corresponds to 256 transparent display panels, and 16 bits corresponds to 65,536 transparent display panels. This means that the concept is the same as the 3D rendering (screen generation) technology for depth used in computer graphics, so technology linkage is easy. For example, in the case of computer game graphics that use 16 bits and 65,536 depths, it is enough to render with 8 depths using 8 transparent display panels.

[0042] Meanwhile, in order to implement more diverse depths in the multilayer display panel (140), i.e., to increase the depth resolution, the number of transparent display panels constituting the multilayer display panel (140) can be increased. Conversely, if the depth resolution can be lowered, the number of transparent display panels constituting the multilayer display panel (140) can be reduced. However, in either case, considering the 3D computer graphics technology as described above, the number of transparent display panels is 2. n It's better to do it with a dog.

[0043] When the depth screen display unit (130) displays the depth screens on the transparent display panels, the screen brightness is set higher for screens with deeper depth, and the screen brightness is set lower for screens with shallower depth. In other words, the display brightness of the depth screen is made proportional to the depth. As illustrated in FIG. 6, since the transmittance (ΔT1, ΔT2, ΔT3, ΔT4) of the transparent display panels does not have 100% complete transmittance, the screen with deeper depth may appear darker due to the transparent display panels arranged in front. Accordingly, the depth screen is displayed brighter toward the rear than at the front, so that when viewed from the front with a human eye, all the depth screens are adjusted to a similar brightness.

[0044] Furthermore, since transparent display panels can produce a kind of filter effect, the deeper the screen, the more the depth of field may be distorted by the transparent display panels arranged in front, so the corresponding filter can be applied to each depth field to compensate for this.

[0045] Specifically, if the filter effect of each transparent display panel is called Γ (gamma), then each panel has Γ -1 A distortion reduction effect can be achieved through (gamma inverse transformation). This can be implemented through the transparent display panel's own settings or through post-processing of the depth screen by the depth screen generation unit (120).

[0046] FIG. 7 is a diagram illustrating a configuration of a 3D display device according to another embodiment of the present invention. As illustrated, the 3D display device according to the embodiment of the present invention is configured to further include a panel position adjustment unit (150) in addition to the 3D display device illustrated in FIG. 3 described above.

[0047] The panel position adjustment unit (150) can be implemented as a stage driving means in the depth direction to adjust the gaps (Δd1, Δd2, Δd3) between the transparent display panels by adjusting the positions of each of the transparent display panels constituting the multilayer display panel (140), as shown in FIG. 8.

[0048] In adjusting the gaps (Δd1, Δd2, Δd3) between transparent display panels, the depth screen generation unit (120) adaptively sets the depths of the depth screens, and the panel position adjustment unit (150) rearranges the transparent display panels according to the set depths to adjust the gaps.

[0049] For example, when the depth of the 3D stereoscopic image is large, that is, when it must express up to a very long distance, the multilayer display panel (140) must be longer in the depth direction, thereby widening the gap between the transparent display panels. Also, when the depth of the 3D stereoscopic image is small, that is, when it must express only a close distance, the multilayer display panel (140) can be shortened in the depth direction, thereby narrowing the gap between the transparent display panels.

[0050] The panel position adjustment unit (150) can also adjust the intervals between the transparent display panels differently. For example, it is possible to adjust the intervals between the transparent displays so that the depth resolution is higher in a specific space among the 3D stereoscopic space than in other spaces. Specifically, the intervals between the transparent display panels are reduced in the near space to arrange them densely, and the intervals between the transparent display panels are increased in the far space to arrange them sparsely. As another example, it is possible to reduce the intervals between the transparent display panels in the space of interest where the main object is located, and increase the intervals between the transparent display panels in the space of no interest.

[0051] Furthermore, the spacing between transparent display panels can be adjusted according to the user's intention. That is, the user can densely arrange transparent display panels within a desired depth space to enhance the depth resolution. In this case, the panel position adjustment unit (150) adjusts the spacing between each transparent display panel according to the user's settings.

[0052] So far, a preferred embodiment of a 3D display device that improves visual fatigue and dizziness has been described in detail. In the above embodiment, a 3D image with a sense of depth is displayed through a plurality of transparent display panels arranged along the depth direction, thereby aligning the perceived depth with the actual focus position, thereby eliminating the occurrence of the burst phenomenon and alleviating visual fatigue and dizziness.

[0053] In addition, when displaying depth screens on each transparent display panel, the screen brightness is set higher for screens with deeper depth and the screen brightness is set lower for screens with shallower depth, so that all depth screens are observed with similar brightness when viewed from the front, thereby improving the realism of 3D stereoscopic images, and the intervals between each transparent display panel along the depth direction can be adjusted variably and adaptively to the depth screens, so that the depth resolution can be increased for close-range spaces, main spaces, and spaces desired by the user.

[0054] The 3D display device presented in the above embodiment assumes generating depth images and displaying them on transparent display panels. However, the technical concept of the present invention can also be applied to cases where only some of these are implemented, such as a device and method for generating depth images to be displayed on transparent display panels, and a device and method for obtaining depth images from an external source and displaying them on transparent display panels.

[0055] Meanwhile, it goes without saying that the technical idea of ​​the present invention can also be applied to a computer-readable recording medium containing a computer program that performs the functions of the device and method according to the present embodiment. In addition, the technical idea according to various embodiments of the present invention can be implemented in the form of computer-readable code recorded on a computer-readable recording medium. The computer-readable recording medium can be any data storage device that can be read by a computer and store data. For example, the computer-readable recording medium can be a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical disk, a hard disk drive, etc. In addition, the computer-readable code or program stored on the computer-readable recording medium can be transmitted through a network connected between computers.

[0056] In addition, although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and various modifications can be made by a person having ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present invention.

Claims

1. A plurality of transparent display panels arranged along the depth direction; A generation unit that generates multiple depth screens from a 3D image; A display unit that displays the generated depth screens on each of the transparent display panels; The creation part is, A 3D display device characterized by generating depth images so that the observer's sense of depth and the actual focus position are consistent.

2. In claim 1, When displaying a frustum culling through transparent display panels in a 3D image space, the specifications of the frustum are as follows: A 3D display device characterized by being determined according to the specifications of transparent display panels.

3. In claim 2, The near depth of the frustum is The depth of the transparent display panel with the shallowest depth, The far depth of the frustum is The depth of the transparent display panel with the deepest depth, The near plane of the frustum is Inside the transparent display panel with the shallowest depth, A 3D display device characterized in that the far plane of the frustum is inside the transparent display panel with the deepest depth.

4. In claim 1, The display part is, A 3D display device characterized in that the brightness of the depth screen is set to be proportional to the depth.

5. In claim 1, In claim 1, A 3D display device further comprising an adjustment unit for adjusting the respective gaps between the transparent display panels along the depth direction.

6. In claim 5, The coordination department, A 3D display device characterized by adjusting the spacing between each of the transparent display panels according to the user's settings.

7. In claim 5, The coordination department, A 3D display device characterized in that the spacing between each of the transparent display panels can be adjusted differently.

8. In claim 5, The coordination department, A 3D display device characterized by adjusting the spacing between transparent displays so that the depth resolution is higher in a specific space among 3D graphics spaces than in other spaces.

9. In claim 8, A specific space, A 3D display device characterized by being a near-field space or a space of interest. Step of generating multiple depth screens from 10.3D images; A step of displaying the generated depth screens on each of a plurality of transparent display panels arranged along the depth direction; The creation phase is, A 3D display method characterized by generating depth images so that the observer's sense of depth and the actual focus position are consistent.

11. A plurality of transparent display panels arranged along the depth direction; For transparent display panels, Multiple depth screens generated from 3D images are displayed, respectively. Depth screens, A 3D display device characterized in that the depth perception of the observer and the actual focus position are generated to match.

12. Step of acquiring multiple depth screens; A step of displaying the acquired depth screens on each of a plurality of transparent display panels arranged along the depth direction; Depth screens, A 3D display method characterized in that the depth perception of an observer and the actual focus position are generated from a 3D image so as to match.

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