Near-eye display device

Abstract

A near-eye display device, comprising: a tiled display screen (1); and an optical assembly (2), comprising multiple optical elements (21). Target optical elements (21a) close to a tiling gap (10) in the tiled display screen (1) satisfy: a central point (E) of the tiling gap (10), the central point of a target optical element (21a) or a connection point (A) of two adjacent optical elements among the target optical elements (21a), and a central point (B) of an eye box area are located on the same straight line. Element parameters of the target optical elements (21a) are associated with the size of the tiling gap (10).

Description

Near-eye display devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202410024809.1 and application date of January 8, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application belongs to the field of display technology, and in particular relates to a near-eye display device. Background Art

[0004] To improve the field of view (FOV) and resolution of near-eye display devices, providing users with a wider field of view and higher image quality, near-eye display devices use splicing screen technology to connect multiple displays. There are splicing gaps between the spliced ​​displays, and no pixels are displayed in the gaps. As a result, the virtual image projected onto the virtual image surface after the gaps are magnified by optical components is completely black. Light from the virtual image enters the human eye, resulting in a discontinuous image seen by the user (i.e., black shadows appear in the image seen by the user), as shown in Figure 1. This affects the user's sense of immersion and visual experience.

[0005] Summary of the Invention

[0006] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a near-eye display device that can provide a continuous and complete image while improving the FOV and resolution of the near-eye display device, thereby enhancing the user's immersion and visual experience.

[0007] In a first aspect, the present application provides a near-eye display device, comprising:

[0008] A spliced ​​display screen, comprising a plurality of spliced ​​display screens, with a splicing gap between two adjacent display screens;

[0009] An optical assembly, located on the light-emitting side of the spliced ​​display screen, the optical assembly comprising a plurality of optical elements distributed and connected in an array;

[0010] The target optical element close to the splicing gap satisfies:

[0011] The target optical element includes an optical element, and the center point of the splicing gap, the center point of the target optical element, and the center point of the eye box area of ​​the near-eye display device are located on the same straight line; or,

[0012] The target optical element includes two adjacent optical elements, and the center point of the splicing gap, the connection point of the two adjacent optical elements, and the center point of the eye box area are located on the same straight line;

[0013] The element parameters of the target optical element are associated with the size of the stitching gap, so that the light of the virtual image generated by the stitching gap is incident outside the eye box area of ​​the near-eye display device.

[0014] According to the near-eye display device of the present application, a spliced ​​display screen is provided, and an optical component is provided on the light-emitting side of the spliced ​​display screen, so that more image light enters the human eye, thereby improving the FOV and resolution of the near-eye display device. In addition, when the target optical element close to the splicing gap includes one optical element, the center point of the splicing gap, the center point of the target optical element, and the center point of the eye box area are located on the same straight line. In the case where the target optical element includes two adjacent optical elements, the center point of the splicing gap, the connection point of the two adjacent optical elements, and the center point of the eye box area are located on the same straight line, and the element parameters of the target optical element are associated with the size of the splicing gap, so that the light of the virtual image generated by the splicing gap is incident outside the eye box area of ​​the near-eye display device, thereby preventing the virtual image generated by the splicing gap from entering the human eye, providing the user with a continuous and complete image, and improving the user's immersion and visual experience.

[0015] According to one embodiment of the present application, the element parameters of the target optical element include size;

[0016] The size of the target optical element is associated with the size of the stitching gap.

[0017] According to one embodiment of the present application, the element parameters of the target optical element are associated with the size of the splicing gap.

[0018] According to one embodiment of the present application, the size of the target optical element is larger than the size of the splicing gap.

[0019] According to one embodiment of the present application,

[0020] The size of the target optical element is positively correlated with the size of the splicing gap.

[0021] According to one embodiment of the present application, the size of the eye box area is larger than the maximum size of the pupil.

[0022] According to one embodiment of the present application, the element parameters include focal length;

[0023] The focal length of the target optical element is fixed, or the focal length of the target optical element is negatively correlated with the size of the splicing gap.

[0024] According to one embodiment of the present application, optical elements other than the target optical element in the optical assembly have element parameters that are the same as or different from those of the target optical element.

[0025] According to one embodiment of the present application, the spliced ​​display screen includes any one of a flat display screen, a curved display screen, and a folding display screen.

[0026] According to one embodiment of the present application, the optical element includes a lens, and the lens includes any one of a spherical lens, an aspherical lens, and a free-form lens.

[0027] According to one embodiment of the present application, the spliced ​​display screen includes a sight focus area and a peripheral area outside the sight focus area;

[0028] The resolution of the display screen in the visual focus area is higher than the resolution of the display screen in the peripheral area.

[0029] According to one embodiment of the present application, the display screen in the visual focus area includes an OLED display screen, and the display screen in the peripheral area includes an LCD display screen.

[0030] According to one embodiment of the present application, the peripheral area is located to the side and below the visual focus area.

[0031] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0032] By setting up a splicing display screen and arranging an optical component on the light-emitting side of the splicing display screen, more image light can enter the human eye, thereby improving the FOV and resolution of the near-eye display device. In addition, when the target optical element close to the splicing gap includes one optical element, the center point of the splicing gap, the center point of the target optical element, and the center point of the eye box area are located on the same straight line. When the target optical element includes two adjacent optical elements, the center point of the splicing gap, the connection point of the two adjacent optical elements, and the center point of the eye box area are located on the same straight line, and the element parameters of the target optical element are associated with the size of the splicing gap, so that the light of the virtual image generated by the splicing gap is incident on the outside of the eye box area of ​​the near-eye display device, thereby preventing the virtual image generated by the splicing gap from entering the human eye, providing the user with a continuous and complete image, and improving the user's immersion and visual experience.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] FIG1 is a schematic diagram of an image in a near-eye display device in the related art;

[0036] FIG2 is a schematic diagram of a structure of a near-eye display device according to an embodiment of the present application;

[0037] FIG3 is a second structural diagram of a near-eye display device provided in an embodiment of the present application;

[0038] FIG4 is a second schematic diagram of an image in a near-eye display device in the related art;

[0039] FIG5 is a third schematic diagram of an image in a near-eye display device in the related art;

[0040] FIG6 is a fourth schematic diagram of an image in a near-eye display device in the related art;

[0041] FIG7 is a fifth schematic diagram of an image in a near-eye display device in the related art;

[0042] FIG8 is a sixth schematic diagram of an image in a near-eye display device in the related art;

[0043] FIG9 is a schematic diagram of an image in a near-eye display device provided in an embodiment of the present application;

[0044] FIG10 is a schematic diagram of the structure of an optical component in a near-eye display device provided in an embodiment of the present application;

[0045] FIG11 is a third structural diagram of a near-eye display device provided in an embodiment of the present application;

[0046] FIG12 is a fourth structural diagram of a near-eye display device provided in an embodiment of the present application;

[0047] FIG13 is a schematic structural diagram of a spliced ​​display screen in a near-eye display device provided in an embodiment of the present application;

[0048] FIG14 is a top view of a spliced ​​display screen in a near-eye display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0050] The near-eye display device provided by the embodiments of the present application is described below with reference to the accompanying drawings.

[0051] Figure 2 is a schematic diagram of the structure of a near-eye display device provided in an embodiment of the present application. The near-eye display device may include a virtual reality (VR) device or an augmented reality (AR) device.

[0052] As shown in Figure 2, the near-eye display device includes a tiled display screen 1 and an optical assembly 2, with the optical assembly 2 located on the light-emitting side of the tiled display screen 1. The tiled display screen 1 includes multiple tiled display screens 11. The sizes of the multiple display screens 11 can be the same or different. The display screen dimensions can include the length, width, and / or display area of ​​the display screen. The resolutions of the multiple display screens 11 can be the same or different.

[0053] There is a splicing gap 10 between two adjacent display screens 11. This splicing gap 10 may refer to the gap between the two adjacent display screens 11. In the case where the display screen 11 includes a display area and a non-display area, the splicing gap 10 may refer to the gap between the display areas of the two adjacent display screens 11. No pixels are displayed at the splicing gap 10.

[0054] The optical assembly 2 includes a plurality of optical elements 21 distributed and connected in an array, and is used to magnify the image displayed on the video wall 1. The sizes of the plurality of optical elements 21 can be the same or different. The overall size of the video wall 1 can be larger than the overall size of the optical assembly 2, and the orthographic projection of the optical assembly 2 on the video wall 1 can be located within the video wall 1. The overall size of the video wall 1 can also be smaller than or equal to the overall size of the optical assembly 2, and the orthographic projection of the video wall 1 on the optical assembly 2 can be located within the optical assembly 2, to ensure that the image displayed on the video wall 1 is magnified by the optical assembly 2.

[0055] At least one optical element 21 near the joint gap 10 is a target optical element 21a. The target optical element 21a satisfies the following requirements: the target optical element 21a comprises one optical element, and the center point of the joint gap 10, the center point of the target optical element 21a, and the center point of the eye-box of the near-eye display device are located on the same straight line; or the target optical element 21a comprises two adjacent optical elements, and the center point of the joint gap 10, the connection point of the two adjacent optical elements, and the center point of the eye-box are located on the same straight line. Furthermore, the element parameters of the target optical element 21a are associated with the size of the joint gap 10, so that the light of the virtual image 30 generated by the joint gap 10 is incident outside the eye-box of the near-eye display device.

[0056] Among them, the size of the splicing gap 10 includes the width of the splicing gap 10 along the first direction X, etc., and the element parameters of the target optical element 21a include the size of the target optical element 21a (such as the width along the first direction X, etc.). The virtual image 30 generated by the splicing gap 10 refers to the virtual image 30 (black shadow) projected onto the virtual image surface 3 after the splicing gap 10 is magnified by the target optical element 21a. In optical design, eye-box refers to the area where the observer's eyes can maintain a relatively free position and still see a clear and correct image or field of view when observing or using an optical system. The eye-box is related to factors such as the field of view of the optical system, the focus of the line of sight, and the curvature of the field of view. In optical systems, especially in the design of observation or display devices, it is ensured that when the user or observer's eyes move slightly, a good visual experience can still be maintained without losing clarity or causing other visual problems. For example, the screen's brightness and contrast should be maintained above preset thresholds throughout the entire eyebox to ensure image quality. Another example is that image distortion is strictly limited to an acceptable range to ensure that users experience no significant degradation in image quality as they move their gaze. The definition of the eyebox in this application is not limited to the specific examples above. It can be considered a virtual three-dimensional space within which the observer can move without affecting visual quality.

[0057] The positional relationship between the target optical element 21a, the splicing gap 10, and the eye-box area needs to meet certain requirements.

[0058] When the target optical element 21a comprises a single optical element, the center of the stitching gap 10, the center of the target optical element 21a, and the center of the eye-box region are all on the same straight line. The center of the eye-box region is generally the position of the human eye (i.e., the center of the pupil), so that the center of the stitching gap 10, the center of the target optical element 21a, and the pupil are all on the same straight line.

[0059] When the target optical element 21a includes two adjacent optical elements, as shown in Figures 2 and 3, the center point E of the splicing gap 10, the connection point A of the two adjacent optical elements, and the center point B of the eye-box area are all on the same straight line. The center point B of the eye-box area is generally the position of the human eye 4 (i.e., the center of the pupil), so that the center point E of the splicing gap 10, the connection point A of the two adjacent optical elements, and the pupil position are all on the same straight line.

[0060] The center point B of the eye-box area may be located on the center axis C of the near-eye display device, or may not be located on the center axis C of the near-eye display device.

[0061] As shown in Figure 2, when the center point B of the eye box area eye-box is located at the center axis C of the near-eye display device, the center point E of the stitching gap 10 and the connection point A of the two adjacent optical elements in the target optical element 21a are both located on the center axis C, so that the center point E of the stitching gap 10, the connection point A of the two adjacent optical elements and the center point B of the eye box area eye-box are located on the same straight line, the position of the human eye 4 is located at the center point B of the eye box area eye-box, and the element parameters of the two adjacent optical elements are associated with the size of the stitching gap 10, thereby ensuring that the virtual image 30 generated by the stitching gap 10 will not enter the human eye 4.

[0062] As shown in Figure 3, when the center point B of the eye box area eye-box is not located on the center axis C of the near-eye display device, the center point E of the stitching gap 10 and / or the connection point A of the two adjacent optical elements in the target optical element 21a may not be located on the center axis C. It is only necessary to ensure that the center point E of the stitching gap 10, the connection point A of the two adjacent optical elements and the center point B of the eye box area eye-box are located on the same straight line. The position of the human eye 4 is located at the center point B of the eye box area eye-box, and the element parameters of the two adjacent optical elements are associated with the size of the stitching gap 10, thereby ensuring that the virtual image 30 generated by the stitching gap 10 will not enter the human eye 4.

[0063] In this embodiment, a spliced ​​display screen 1 is provided, and an optical component 2 is provided on the light-emitting side of the spliced ​​display screen 1 to increase the FOV of the near-eye display device, allowing the user to see the complete virtual environment to ensure that the user perceives the breadth of the virtual environment, and to increase the resolution of the near-eye display device to allow the user to see clear images to ensure visual quality and clarity. Although there is a splicing gap 10 between the spliced ​​display screens 11 in the spliced ​​display screen 1, and the virtual image 30 (black shadow) generated by the splicing gap 10 is projected onto the virtual image plane 3, by providing a target optical element 21a, when the target optical element 21a comprises a single optical element, the center point of the splicing gap 10, the center point of the target optical element 21a, and the center point of the eye-box area are located on the same straight line. When the target optical element 21a comprises two adjacent optical elements, the center point of the splicing gap 10, the connection point of the two adjacent optical elements, and the center point of the eye-box area are located on the same straight line, and the element parameters of the target optical element 21a are associated with the size of the splicing gap 10. This allows the light of the virtual image 30 generated by the splicing gap 10 to be incident outside the eye-box area. However, the human eye moves within the eye-box area, making the virtual image 30 invisible to the human eye 4. In other words, the user can see a continuous and complete image, thereby enhancing the user's immersion and visual experience.

[0064] In addition, related technologies use hardware stitching, software stitching, fusion, transparent display, or light field display technologies to ensure image continuity. Hardware stitching uses frames and brackets to position and align multiple displays, ensuring seamless stitching. Software stitching uses image processing software to process and merge images from multiple displays, such as by matching and correcting the pixel coordinates of images on different displays to achieve image continuity. Fusion combines hardware and software methods to achieve optimized display on multiple displays, including hardware stitching and correction, as well as further correction using image processing software. Transparent display technology uses transparent displays to achieve image fusion, reducing visible gaps between displays. Light field display technology uses complex optical design and image generation to provide continuous images at different viewing angles and positions, reducing image differences on the stitched display and improving visual consistency. However, these methods require more advanced computer hardware to process the image stitching, resulting in higher hardware costs, limiting their widespread adoption, and increasing the computational burden and system complexity.

[0065] In contrast to the related art, where light from the virtual image created by the stitching gaps enters the human eye, resulting in a discontinuous image seen by the user, this embodiment optimizes the optical design and imaging method of optical component 2 to ensure that the user sees a continuous and complete image. Compared to the related art, which uses hardware stitching technology, software stitching technology, fusion technology, transparent display technology, or light field display technology to ensure image continuity, this embodiment, based on the optical design and imaging method of optical component 2, ensures that the user sees a continuous and complete image. This eliminates the need for more advanced computer hardware to process the image stitching, does not increase the computational burden, simplifies system complexity, and reduces hardware costs, facilitating large-scale application of the device.

[0066] In some embodiments, the element parameters of the target optical element 21 a include size. The size of the target optical element 21 a may be the width of the target optical element 21 a along the first direction X. The size of the target optical element 21 a is associated with the size of the splicing gap 10 , that is, the size of the target optical element 21 a may be designed based on the size of the splicing gap 10 .

[0067] In some embodiments, the size of the target optical element 21a is larger than the size of the stitching gap 10. If the positional relationship between the target optical element 21a, the stitching gap 10, and the eye-box area meets certain requirements, the size of the target optical element 21a is larger than the size of the stitching gap 10, and the size of the target optical element 21a is correlated with the size of the stitching gap 10, this can further ensure that the user sees a continuous and complete image, thereby further enhancing the user's immersion and visual experience.

[0068] The size of the target optical element 21a is positively correlated with the size of the splicing gap 10, that is, the larger the size of the splicing gap 10 is, the larger the size of the target optical element 21a is, and the smaller the size of the splicing gap 10 is, the smaller the size of the target optical element 21a is.

[0069] The sizes of the stitching gaps 10 between different display screens 11 vary, and the size of the target optical element 21a located near the stitching gap 10 is determined based on the size of the stitching gap 10. For example, if the size of the stitching gap 10 is fixed and the size of the target optical element 21a is gradually increased, the virtual image 30 projected onto the virtual image plane 3 after being magnified by the target optical element 21a from the stitching gap 10 slowly moves outward from the virtual image plane 3 until the light from the virtual image 30 is incident outside the eye-box of the near-eye display device, meaning that the light from the virtual image 30 cannot enter the human eye 4. Therefore, the target optical element 21a is designed based on the size of the target optical element 21a at which the light from the virtual image 30 cannot enter the human eye, thereby ensuring that the images on the different display screens 11 are seamlessly connected and presented to the user.

[0070] For example, the gap 10 between two adjacent display screens 11 is 4 mm. When the size of the target optical element 21a is 3 mm, the image viewed by the user is shown in FIG4 ; when the size of the target optical element 21a is 4 mm, the image viewed by the user is shown in FIG5 ; when the size of the target optical element 21a is 4.5 mm, the image viewed by the user is shown in FIG6 ; when the size of the target optical element 21a is 5 mm, the image viewed by the user is shown in FIG7 ; when the size of the target optical element 21a is 5.5 mm, the image viewed by the user is shown in FIG8 ; and when the size of the target optical element 21a is 6 mm, the image viewed by the user is shown in FIG9 . It can be seen that the image shown in FIG9 is a continuous and complete image, that is, the image shown in FIG9 does not have a virtual image 30 (black shadow). Therefore, when the gap 10 between two adjacent display screens 11 is 4 mm, the size of the target optical element 21a can be set to 6 mm to ensure that the user sees a continuous and complete image.

[0071] In some embodiments, the size of the eye-box region is larger than the maximum size of the pupil, wherein the size of the eye-box region may be the width of the eye-box region along the first direction X.

[0072] When the positional relationship between the target optical element 21a and the splicing gap 10 and the eye-box area meets certain requirements, the size of the eye-box area is larger than the maximum size of the pupil, and the size of the target optical element 21a is larger than the size of the splicing gap 10, the size of the target optical element 21a is associated with the size of the splicing gap 10 (such as a positive correlation) so that continuous focusing can be achieved during user use, ensuring that the user can always see a continuous and complete image, thereby further enhancing the user's immersion and visual experience.

[0073] In some embodiments, the element parameters of the target optical element 21a may include a focal length. The focal length of the target optical element 21a may be fixed, or the focal length of the target optical element 21a is negatively correlated with the size of the splicing gap 10, that is, the larger the size of the splicing gap 10, the smaller the focal length of the target optical element 21a.

[0074] When the positional relationship between the target optical element 21a and the stitching gap 10 and the eye-box area meets certain requirements, the size of the target optical element 21a is larger than the size of the stitching gap 10, and the size of the target optical element 21a is positively correlated with the size of the stitching gap 10, and the focal length of the target optical element 21a is negatively correlated with the focal length of the stitching gap 10, which can further ensure that the user sees a continuous and complete image, thereby further improving the user's immersion and visual experience.

[0075] In some embodiments, the target optical element 21a may further include other optical elements, such as other optical elements adjacent to the aforementioned one optical element, or other optical elements adjacent to the aforementioned two adjacent optical elements, which is not specifically limited here.

[0076] In some embodiments, the optical components 21 other than the target optical component 21 a in the optical assembly 2 may have different element parameters than the target optical component 21 a. In other words, the optical assembly 2 includes at least two optical components 21 (the target optical component 21 a and the other optical components 21 ), and the element parameters of the at least two optical components 21 may be different.

[0077] When the element parameters include size and focal length, the target optical component 21a and the other optical components 21 have the same size but different focal lengths; or different sizes but the same focal lengths; or different sizes and different focal lengths.

[0078] As shown in Figures 10 and 11, the four optical elements located at the center of the optical assembly 2 (near the splicing gap 10) are the target optical elements 21a. The size of the target optical element 21a is associated with the size of the splicing gap 10, that is, the size of the target optical element 21a is positively correlated with the size of the splicing gap 10, the focal length of the target optical element 21a is fixed, or the focal length of the target optical element 21a is negatively correlated with the size of the splicing gap 10. The size and focal length of the other optical elements 21 located on the periphery of the target optical element 21a are not related to the size of the splicing gap 10. The size of the other optical elements 21 is different from the size of the target optical element 21a. For example, the size of the other optical elements 21 can be smaller than the size of the target optical element 21a. The focal length of the other optical elements 21 can be the same as or different from the focal length of the target optical element 21a.

[0079] The center point E of the stitching gap 10, the connection point A of the two adjacent optical elements in the target optical element 21a, and the center point B of the eye-box area are located on the central axis C, as shown in Figure 11, and the sizes of the two adjacent optical elements in the target optical element 21a are larger than the size of the stitching gap 10. The sizes of the two adjacent optical elements in the target optical element 21a are related to the size of the stitching gap 10, so that the light of the virtual image 30 generated by the stitching gap 10 is incident outside the eye-box area, thereby preventing the virtual image 30 from entering the human eye 4.

[0080] In some embodiments, the optical components 21 other than the target optical component 21a in the optical assembly 2 may have the same element parameters as the target optical component 21a. In other words, the optical assembly 2 may include only one type of optical component 21, and the element parameters of all optical components 21 in the optical assembly 2 are the same.

[0081] In the case where the element parameters include size and focal length, the size and focal length of each optical component 21 in the optical assembly 2 are the same.

[0082] As shown in Figure 3, the size of each optical element 21 in the optical component 2 is associated with the size of the splicing gap 10, for example, the size of each optical element 21 is positively correlated with the size of the splicing gap 10, the focal length of each optical element 21 is fixed, or the focal length of each optical element 21 is negatively correlated with the size of the splicing gap 10.

[0083] In some embodiments, the overall image size W on the virtual image plane 3 within the FOV is Ws(de+f+do) / de, where Ws is the overall size of the tiled display 1, de is the eye-relief, f is the focal length of the optical element 21, and do is the imaging distance.

[0084] In some embodiments, the relationship between the eyebox range (i.e., the size of the eyebox area) eye-box we, the size gap of the stitching gap 10, the size wl of the target optical element 21a, and the focal length f is: eye-box we = (wl - gap) de / f. Furthermore, the size wl of the target optical element 21a is greater than the size gap of the stitching gap 10, i.e., wl > gap.

[0085] The eye-box we needs to be larger than the maximum pupil size (e.g., 8mm). When the gap 10 size gap = 2.7mm, the optical element 21 size wl = 12.7mm, the exit pupil distance de = 20mm, and the focal length f = 5mm, the FOV is 130° and the eye-box we = 40mm, fully covering the range of motion of the human eye.

[0086] In some embodiments, the spliced ​​display screen 1 includes any one of a flat screen, a curved screen, and a foldable screen. If the spliced ​​display screen 1 is a flat screen, as shown in Figures 2, 3, and 11, the optical assembly 2 is arranged in a flat surface, i.e., the multiple optical elements 21 in the optical assembly 2 are distributed in a flat surface. If the spliced ​​display screen 1 is a curved screen, the optical assembly 2 is arranged in a curved surface, i.e., the multiple optical elements 21 in the optical assembly 2 are distributed in a curved surface. If the spliced ​​display screen 1 is a foldable screen, as shown in Figure 12, the optical assembly 2 is arranged in a foldable configuration.

[0087] To further improve the field of view of the near-eye display device, the spliced ​​display screen 1 can be a curved display screen or a foldable display screen. In a curved display screen or a foldable display screen, as shown in FIG12 , the position of the human eye 4 is not on the central axis C, but the center point E of the splicing gap 10, the connection point A of two adjacent optical elements in the target optical element 21a, and the center point B of the eye-box area (i.e., the position of the human eye 4) are located on the same straight line. In addition, the sizes of the two adjacent optical elements in the target optical element 21a are both larger than the size of the splicing gap 10. The sizes of the two adjacent optical elements in the target optical element 21a are both related to the size of the splicing gap 10, so that the light of the virtual image 30 generated by the splicing gap 10 is incident outside the eye-box area, thereby preventing the virtual image 30 from entering the human eye 4.

[0088] In some embodiments, the optical component 2 includes a lens array, the optical element 21 includes a lens, and the lens includes any one of a spherical lens, an aspherical lens, and a free-form lens.

[0089] In this embodiment, different types of lens arrays can be selected according to specific application requirements. Different types of lens arrays can meet the requirements of different application scenarios, thereby improving the application flexibility of the near-eye display device.

[0090] In some embodiments, as shown in FIG13 , the spliced ​​display screen 1 includes a visual focus area 12 and a peripheral area 13 outside the visual focus area 12. The resolution of the display screen 11 in the visual focus area 12 is higher than that of the display screen 11 in the peripheral area 13.

[0091] The human eye's visual perception varies in different areas of the field of view, meaning that the human eye has different recognition requirements for different areas. Different types of display screens can be set up in different areas based on the recognition requirements of different areas to provide a higher-quality visual experience while minimizing costs. The area of ​​the spliced ​​display screen 1 that corresponds to the center of the human eye is the visual focus area 12. A high-resolution display screen 11 can be set up in the visual focus area 12 to ensure that the user obtains excellent image quality in the visual focus area 12, which helps to enhance the user's sense of immersion and reality. A low-resolution display screen 11 can be set up in the peripheral area 13 to expand the FOV over a wider field of view, providing the user with a greater sense of virtual environment.

[0092] The type and number of display screens 11 in the focal area 12 are not specifically limited, nor are the type and number of display screens 11 in the peripheral area 13. These can be configured and adjusted based on actual application scenarios and user needs, providing users with a flexible and application-specific virtual reality experience. The architecture of this embodiment allows for future scalability, allowing for upgrades or additions of display screens as technology advances and market demands change, ensuring the device remains competitive in the future.

[0093] In some embodiments, the display screen 11 of the visual focus area 12 includes an OLED display screen, and the display screen 11 of the peripheral area 13 includes an LCD display screen. The resolution of the OLED display screen may be 4K, and the resolution of the LCD display screen may be 2K.

[0094] The peripheral area 13 is located on at least one side of the visual focus area 12. For example, the peripheral area 13 can be arranged around the visual focus area 12. In some embodiments, the peripheral area 13 is located to the side and below the visual focus area 12. As shown in FIG14 , in the tiled display screen 1a corresponding to the left eye 4a, the peripheral area 13 is located to the left and below the visual focus area 12; in the tiled display screen 1b corresponding to the right eye 4b, the peripheral area 13 is located to the right and below the visual focus area 12.

[0095] This embodiment can realize the splicing of display screens of various sizes, pixel densities and numbers of display screens to meet the needs of various application scenarios. For example, as shown in Figure 13, the spliced ​​display screen 1 includes two OLED display screens 11a with relatively small sizes but relatively high resolutions and two LCD display screens 11b with relatively large sizes but relatively low resolutions. The two OLED display screens 11a are located at the center of the human eye, that is, the two OLED display screens 11a are located in the visual focus area 12 to ensure that the user obtains high-quality images in the key area of ​​the visual field. At the same time, in order to widen the overall field of view (FOV) and reduce costs as much as possible, the two LCD display screens 11b are respectively located to the side and below the visual focus area 12. As shown in Figure 14, the FOV corresponding to the left eye 4a and the right eye 4b are both 130°.

[0096] The resolution of the two OLED displays 11a is 4K, the resolution of the two LCD displays 11b is 2K, and the resolution of a single eye reaches 10K to meet the requirements of high resolution and large FOV.

[0097] The flexibility of this embodiment allows it to adapt to different usage scenarios and user needs. Depending on the specific application, the size and configuration of each display screen 11 in the tiled display screen 1 can be adjusted to meet the needs of a specific scenario. This flexibility provides users with a customized virtual reality experience. This embodiment can be applied to various visual experience scenarios requiring a large FOV and high resolution, such as simulation training, medical image processing, and scientific visualization.

[0098] After optical imaging, the present embodiment can process the image to further optimize the quality and continuity of the image. In terms of software rendering, the present embodiment adopts technologies such as image synthesis, correction and calibration, multi-channel rendering and performance optimization. Among them, image synthesis refers to the presentation of a unified image on multiple display screens 11, which usually requires image synthesis at the software level, including merging the contents of multiple image sources into a continuous image to adapt to the overall size of the spliced ​​display screen 1. Correction and calibration refer to correcting differences in color, brightness, distortion, etc. between the display screens 11 to ensure visual consistency. Multi-channel rendering means that in order to render multiple display screens 11 at the same time, the software needs to be able to manage multiple rendering channels, effectively distribute graphics rendering workloads, and ensure that each channel works synchronously. Software rendering requires performance optimization to ensure smooth image rendering at high resolution and high refresh rate, which may involve graphics rendering techniques, multi-threaded rendering and GPU acceleration.

[0099] According to the near-eye display device provided by the embodiment of the present application, by setting a spliced ​​display screen and an optical component located on the light-emitting side of the spliced ​​display screen, more image light enters the human eye, thereby improving FOV and resolution and enhancing the user's visual experience; when the target optical element near the splicing gap includes one optical element, the center point of the splicing gap, the center point of the target optical element and the center point of the eye box area are located on the same straight line; when the target optical element includes two adjacent optical elements, the center point of the splicing gap, the connection point of the two adjacent optical elements and the center point of the eye box area are located on the same straight line, and the element parameters of the target optical element are associated with the size of the splicing gap, so that the splicing gap produces The light of the virtual image is incident outside the eye box area of ​​the near-eye display device, providing the user with a continuous and complete image; there is no need for more powerful computer computing power to deal with the problems caused by the stitching gaps, which does not increase the computing requirements, reduces hardware costs, and simplifies the complexity of the system; the elimination of black shadows between images reduces the user's visual fatigue and discomfort when using the near-eye display device for a long time, and further improves the comfort of the virtual reality experience; a high-resolution display is set in the focus area of ​​the line of sight, and a low-resolution display is set in the peripheral area to achieve higher visual quality with a relatively low-cost hardware configuration; it supports multiple types of spliced ​​display screens and multiple types of lens arrays, which has greater flexibility and is suitable for different application scenarios.

[0100] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "first," "second," and the like generally distinguish objects of a class and do not limit the number of objects. For example, the first object may be one or more.

[0101] In the description of this application, “plurality” means two or more.

[0102] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0103] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A near-eye display device, wherein, Comprising: A spliced display screen, including a plurality of spliced display screens, with a splicing gap between adjacent display screens; An optical component, located on the light-emitting side of the spliced display screen, the optical component including a plurality of optically connected elements distributed in an array; Wherein, the target optical element near the splicing gap satisfies: The target optical element includes one optical element, and the center point of the splicing gap, the center point of the target optical element, and the center point of the eye box area of the near-eye display device are located on the same straight line; Or, The target optical element includes two adjacent optical elements, and the center point of the splicing gap, the connection point of the two adjacent optical elements, and the center point of the eye box area are located on the same straight line; The element parameters of the target optical element are associated with the size of the splicing gap, so that the light rays of the virtual image generated by the splicing gap are incident outside the eye box area.

2. The near-eye display device according to claim 1, wherein, The element parameters of the target optical element include size; The size of the target optical element is associated with the size of the splicing gap.

3. The near-eye display device according to claim 2, wherein, The size of the target optical element is larger than the size of the splicing gap.

4. The near-eye display device according to claim 3, wherein, The size of the target optical element has a positive correlation with the size of the splicing gap.

5. The near-eye display device according to any one of claims 1-4, wherein, The size of the eye box area is larger than the maximum size of the pupil.

6. The near-eye display device according to any one of claims 1-5, wherein, The element parameters of the target optical element include focal length; The focal length of the target optical element is fixed, or the focal length of the target optical element has a negative correlation with the size of the splicing gap.

7. The near-eye display device according to any one of claims 1-6, wherein, The other optical elements in the optical component except the target optical element have the same or different element parameters as the target optical element.

8. The near-eye display device according to any one of claims 1-7, wherein, The spliced display screen includes any one of a flat display screen, a curved display screen, and a foldable display screen.

9. The near-eye display device according to any one of claims 1-8, wherein, The optical element includes a lens, and the lens includes any one of a spherical lens, an aspherical lens, and a free-form lens.

10. The near-eye display device according to any one of claims 1-9, wherein, The spliced display screen includes a line-of-sight focus area and a peripheral area located outside the line-of-sight focus area; The resolution of the display screen in the line-of-sight focus area is higher than the resolution of the display screen in the peripheral area.

11. The near-eye display device according to claim 10, wherein, The display screen in the line-of-sight focus area includes an OLED display screen, and the display screen in the peripheral area includes an LCD display screen.

12. The near-eye display device according to claim 10 or 11, wherein, The peripheral area is located on the side and below the line-of-sight focus area.

Images