3D display device and method of manufacturing the same

Abstract

This invention proposes a 3D display device and its manufacturing method. The 3D display device includes: a display panel, wherein the long side of the display panel extends in a first direction, and the short side of the display panel extends in a second direction; the display panel has a plurality of pixel units arranged in an array; and a lens array disposed on one side of the light-emitting direction of the display panel, the lens array including a plurality of cylindrical lenses arranged along the first direction, the long axis of the cylindrical lenses extending in a direction intersecting the second direction. Therefore, this 3D display device can meet the requirements for bidirectional viewing.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a 3D display device and a method for manufacturing the same. Background Technology

[0002] As digital audiovisual technology enters the high-definition era, three-dimensional (3D) stereoscopic display technology is receiving increasing attention and favor. The current problem with small-sized naked-eye 3D displays is that they cannot meet the requirements for bidirectional viewing.

[0003] Therefore, current 3D display devices still need further improvement. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] In one aspect of the present invention, a 3D display device is provided, comprising: a display panel, wherein the long side of the display panel extends in a first direction and the short side of the display panel extends in a second direction, the display panel having a plurality of pixel units arranged in an array; and a lens array disposed on one side of the light-emitting direction of the display panel, the lens array including a plurality of cylindrical lenses arranged along the first direction, the long axis of the cylindrical lenses extending in a direction intersecting the second direction. Thus, this 3D display device can meet the requirement of bidirectional viewing.

[0006] According to some embodiments of the present invention, the column direction of the pixel units is parallel to the extension direction of the long axis of the cylindrical lens.

[0007] According to some embodiments of the present invention, the extension direction of the long axis of the cylindrical lens forms an angle α with the second direction, and satisfies 40°≤α≤50°.

[0008] According to some embodiments of the present invention, the extension direction of the long axis of the cylindrical lens forms an angle α with the second direction, and α = 45°.

[0009] According to some embodiments of the present invention, the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit satisfies the following condition: the width of the moiré pattern corresponding to the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit is less than the smallest size that the human eye can distinguish.

[0010] According to some embodiments of the present invention, the aperture of the cylindrical lens is a, the horizontal period of the pixel unit is b, the number of pixel units corresponding to one cylindrical lens is c, and c = a / (bcosα).

[0011] According to some embodiments of the present invention, when the number of pixel units corresponding to a series of cylindrical lenses is an integer for the first time, it is the number of viewpoints within the main lobe view.

[0012] According to some embodiments of the present invention, the 3D display device further includes a support layer disposed between the lens array and the display panel.

[0013] In another aspect of the invention, a method for fabricating the aforementioned 3D display device is provided, comprising: providing a display panel, wherein the long side of the display panel extends in a first direction and the short side of the display panel extends in a second direction; and arranging a plurality of pixel units arranged in an array within the display panel; and arranging a lens array on one side of the light-emitting direction of the display panel, the lens array comprising a plurality of cylindrical lenses arranged along the first direction and extending along the second direction, wherein the long axis of the cylindrical lenses intersects the second direction. Thus, the 3D display device fabricated by this method possesses all the features and advantages of the aforementioned 3D display device, which will not be elaborated further here. In general, it at least has the advantage of satisfying bidirectional viewing.

[0014] According to some embodiments of the present invention, when forming the periodically arranged cylindrical lenses and the periodically arranged pixel units, the ratio of the horizontal period of the cylindrical lenses to the horizontal period of the pixel units satisfies the following: the width of the moiré pattern corresponding to the ratio of the horizontal period of the cylindrical lenses to the horizontal period of the pixel units is less than the smallest size that can be distinguished by the human eye. The method for obtaining the relationship between the ratio of the horizontal period of the cylindrical lenses to the horizontal period of the pixel units and the width of the moiré pattern includes: (1) obtaining the actual displayed image signal based on the horizontal period of the cylindrical lenses, the horizontal period of the pixel units, and the opening of the sub-pixels in the pixel units; (2) processing the actual displayed image signal through a human eye contrast sensitivity function to obtain an image signal visible to the human eye.

[0015] According to some embodiments of the present invention, step (1) further includes: obtaining the image signal of the pixel unit and the image signal of the cylindrical lens based on the horizontal period of the cylindrical lens, the horizontal period of the pixel unit and the opening of the sub-pixel in the pixel unit, and performing dot product superposition on the image signal of the pixel unit and the image signal of the cylindrical lens.

[0016] According to some embodiments of the present invention, in step (1), the cylindrical lens is equivalent to a grating, and the horizontal period of the cylindrical lens is equivalently scaled according to the distance between the cylindrical lens and the display panel and the optimal viewing surface.

[0017] According to some embodiments of the present invention, a support layer is provided between the display panel and the lens array. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This illustrates the relative positional relationship between the cylindrical lens and the display panel according to an embodiment of the present invention;

[0020] Figure 2 The relative positional relationship between the cylindrical lens and the display panel in the related technology is shown;

[0021] Figure 3 The simulation diagram shows the two-dimensional spectrum of a pixel unit after passing through a lens array;

[0022] Figure 4 Showing Figure 3 Cross-sectional view along the AA' direction;

[0023] Figure 5 Showing Figure 3 Cross-sectional view along the BB' direction;

[0024] Figure 6 A schematic diagram showing the arrangement of pixel units is displayed;

[0025] Figure 7 This diagram shows the number of viewpoints within the main lobe angle;

[0026] Figure 8 A cross-sectional view of a 3D display device according to an embodiment of the present invention is shown;

[0027] Figure 9 A schematic diagram showing the measured and calculated results of the moiré pattern width according to an embodiment of the present invention is provided.

[0028] Figure 10 This diagram illustrates the relationship between the moiré pattern width and the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit in Embodiment 1 of the present invention.

[0029] Figure 11 This diagram illustrates the relationship between the moiré pattern width and the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit in Embodiment 2 of the present invention.

[0030] Figure label:

[0031] 1: 3D display device; 11: display panel; 12: cylindrical lens; 13: pixel unit; 14: support layer. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below. These embodiments are exemplary and are only used to explain the present invention, and should not be construed as limiting the invention. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in the art or according to the product instructions. Reagents or instruments used, unless otherwise specified, are all commercially available conventional products.

[0033] In one aspect of the present invention, a 3D display device 1 is provided, with reference to... Figure 1 The 3D display device 1 includes a display panel 11 and a lens array. The long side of the display panel 11 extends in a first direction, and the short side extends in a second direction. The display panel 11 has a plurality of pixel units 13 arranged in an array. The lens array is disposed on one side of the light-emitting direction of the display panel 11 and includes a plurality of cylindrical lenses 12 arranged along the first direction. The long axis of the cylindrical lenses 12 extends in a direction intersecting the second direction. Thus, rotating the cylindrical lenses 12 by a certain angle improves the bidirectional viewing effect of the 3D display device 1. It should be noted that, in order to highlight the relative positional relationship between the cylindrical lenses 12 and the display panel 11, Figure 1 Only one cylindrical lens 12 is shown. Specifically, the number of cylindrical lenses 12 in the 3D display device 1 is not particularly limited, and those skilled in the art can design it according to the specific application of the 3D display device 1.

[0034] The principles by which this application achieves the aforementioned beneficial effects are explained in detail below:

[0035] In the related 3D display device 1, the long axis of the cylindrical lens 12 extends parallel to the short side of the display panel 11 (reference). Figure 2 The difference in the broadening of the angular spectrum in the horizontal and vertical directions is significant, which cannot meet the needs of bidirectional viewing. In this application, the lens is rotated so that the extension direction of the long axis of the lens intersects the extension direction of the short side of the display panel 11. This can reduce the difference in the broadening of the angular spectrum in the horizontal and vertical directions to a certain extent, and reduce the difference in horizontal and vertical viewing of the 3D display device 1 to a certain extent, thereby improving the viewing effect of the 3D display device 1.

[0036] According to some embodiments of the present invention, reference Figure 6 The column direction of the pixel units 13 is parallel to the extension direction of the major axis of the cylindrical lens 12. Specifically, the column direction of the pixel units 13 is as follows: Figure 6As shown by the middle arrow, the column direction of the pixel unit 13 is parallel to the extension direction of the long axis of the cylindrical lens 12. That is, the opening direction of the pixel rotates by the same angle as the cylindrical lens 12 rotates, thereby maintaining the parallel relationship between the pixel unit 13 and the cylindrical lens 12, reducing the difference in the angular spectral broadening of the pixel in the horizontal and vertical directions, and reducing crosstalk when viewed horizontally and vertically.

[0037] It should be noted that in the related technology, the extension direction of the major axis of the cylindrical lens 12 is parallel to the extension direction of the short side of the display panel 11. Figure 1 and Figure 6 The cylindrical lens 12 and pixel unit 13 are rotated in opposite directions, causing the extension direction of the long axis of the cylindrical lens 12 and the column direction of the pixel unit 13 to intersect the second direction. Although the cylindrical lens 12 and pixel unit 13 rotate in different directions, they produce the same technical effect.

[0038] According to some embodiments of the present invention, the extension direction of the major axis of the cylindrical lens 12 forms an angle α with the second direction, and satisfies 40°≤α≤50°. For ease of illustration, α is... Figure 1 The angle in the figure represents the rotation angle of the cylindrical lens 12, thereby further reducing the difference between horizontal and vertical viewing of the 3D display device 1 and improving the viewing effect of the 3D display device 1. Furthermore, the angle between the column direction of the pixel units 13 and the second direction is also α, and satisfies 40°≤α≤50°. Thus, while satisfying both horizontal and vertical viewing, crosstalk between the horizontal and vertical directions is further reduced.

[0039] According to some embodiments of the present invention, the extension direction of the major axis of the cylindrical lens 12 forms an angle α with the second direction, and α = 45°. In this case, when viewed laterally and longitudinally, the angular spectrum exhibits the same broadening in both the horizontal and vertical directions (see reference). Figures 3-5 This better meets the needs of bidirectional viewing. Furthermore, the angle between the column direction and the second direction of the pixel unit 13 arrangement is also 45°. In this way, while meeting the needs of bidirectional viewing, crosstalk can be minimized. It should be noted that... Figure 3 Different colors represent different levels of brightness; black areas represent lower brightness, and brighter areas represent higher brightness.

[0040] For small-sized 3D display devices, the optimal viewing surface (the distance between the human eye and the 3D display device 1) is generally closer, typically between 300mm and 400mm. Therefore, the corresponding main lobe angle is larger, resulting in higher retinal resolution. At this distance, the human eye is also more sensitive to crosstalk and moiré patterns. Simultaneously, since these devices are mostly handheld, there are certain limitations on the product's thickness and weight. The two-layer structure in the 3D display device 1 that generates moiré patterns through interference—the pixel layer and the lens array—has a greater distance, more complex periods, and more complex calculation processes. To eliminate moiré patterns in the 3D display device 1, according to some embodiments of the present invention, the ratio of the horizontal period of the cylindrical lens 12 to the horizontal period of the pixel unit 13 satisfies the following condition: the width of the moiré pattern corresponding to this ratio is smaller than the smallest resolvable size by the human eye. Taking the angle between the extension direction of the major axis of the cylindrical lens 12 and the second direction as 45° as an example: When the angle between the extension direction of the major axis of the cylindrical lens 12 and the second direction is 45°, the angle between the column direction of the pixel unit 13 and the second direction is also 45°. At this time, the 3D display device 1 can meet the requirements of bidirectional viewing, while minimizing crosstalk between the horizontal and vertical directions. The width of the moiré pattern corresponding to the ratio of the horizontal period of the cylindrical lens 12 to the horizontal period of the pixel unit 13 is less than the smallest size that the human eye can distinguish, thus avoiding the observation of moiré patterns when the human eye is at the optimal viewing surface. This allows the 3D display device 1 to simultaneously meet the requirements of bidirectional viewing, minimized crosstalk, and no moiré patterns. It should be noted that the smallest size that the human eye can distinguish is related to the optimal viewing surface. For example, when the optimal viewing surface is 300mm, the smallest size that the human eye can distinguish is 300mm × tan1 arcminute, which is 87μm; when the optimal viewing surface is 360mm, the smallest size that the human eye can distinguish is 360mm × tan1 arcminute, which is 101.8μm.

[0041] According to some embodiments of the present invention, reference Figure 1 and Figure 6 The aperture of the cylindrical lens 12 is a, the horizontal period of the pixel unit 13 is b, and the number of pixel units 13 corresponding to one cylindrical lens 12 is c, satisfying c = a / (bcosα). Where a / cosα is the horizontal period of the cylindrical lens 12.

[0042] According to some embodiments of the present invention, a 3D display device 1 has multiple viewpoints within a main lobe to ensure a continuous viewing effect. Considering the resolution requirements of the 3D display device 1 during image arrangement, all pixels under several consecutive lenses need to jointly constitute the viewpoints within the main lobe. In this case, to ensure that the number of pixels within the main lobe is not infinite, the ratio between the horizontal period of the cylindrical lens 12 and the horizontal period of the pixel unit 13 is no longer continuously selectable. When the ratio between the horizontal period of the cylindrical lens 12 and the horizontal period of the pixel unit 13 is not an integer, the relative positions of the first cylindrical lens 12 and the pixel unit 13 under the first cylindrical lens 12, and the positions of the second cylindrical lens 12 and the corresponding pixel unit 13 under the second cylindrical lens 12 are inconsistent. To improve resolution, when the number of pixel units 13 corresponding to multiple consecutive cylindrical lenses 12 is an integer for the first time, that is, the number of viewpoints within the main lobe's viewing angle. For example, see reference... Figure 7 When the ratio of the horizontal period of the cylindrical lens 12 to the horizontal period of the pixel unit 13 is 2.75, the 11 viewpoints under the four cylindrical lenses 12 form a main lobe. This ensures that the relative positions of the first cylindrical lens 12 and the corresponding pixel unit 13 under the first cylindrical lens 12, and the relative positions of the fifth cylindrical lens 12 and the corresponding pixel unit 13 under the fifth cylindrical lens 12, are the same. Therefore, the 3D display device 1 can simultaneously meet the requirements of bidirectional viewing, minimized crosstalk, no moiré patterns, and high resolution.

[0043] It should be noted that the resolution referred to in this application refers to the monocular entry-eye resolution, which is required to meet the retinal resolution.

[0044] According to some embodiments of the present invention, reference Figure 8 The 3D display device 1 may further include a support layer 14 disposed between the lens array and the display panel 11. This ensures the spacing between the lenses and pixels, and especially for 3D display devices 1 with large screens or those containing touchscreens, the support layer 14 prevents the cylindrical lenses 12 from collapsing. It should be noted that the thickness of the support layer 14 is not particularly limited, and those skilled in the art can design it according to the specific type of the 3D display device 1.

[0045] In another aspect of the present invention, a method for fabricating the aforementioned 3D display device 1 is provided, comprising providing a display panel 11, wherein the long side of the display panel 11 extends in a first direction and the short side of the display panel 11 extends in a second direction; a plurality of pixel units 13 arranged in an array are disposed within the display panel 11; and a lens array is disposed on one side of the light-emitting direction of the display panel 11, the lens array including a plurality of cylindrical lenses 12 arranged along the first direction, the long axis of the cylindrical lenses 12 extending in a direction intersecting the second direction. The 3D display device 1 fabricated by this method possesses all the features and advantages of the aforementioned 3D display device 1, which will not be repeated here. In general, it at least has the advantage of satisfying bidirectional viewing.

[0046] According to some embodiments of the present invention, when forming periodically arranged cylindrical lenses 12 and periodically arranged pixel units 13, the ratio of the horizontal period of the cylindrical lenses 12 to the horizontal period of the pixel units 13 satisfies the following: the width of the moiré pattern corresponding to the ratio of the horizontal period of the cylindrical lenses 12 to the horizontal period of the pixel units 13 is less than the smallest size that the human eye can distinguish. The method for obtaining the relationship between the ratio of the horizontal period of the cylindrical lenses 12 to the horizontal period of the pixel units 13 and the width of the moiré pattern includes:

[0047] (1) Obtain the actual displayed image signal based on the horizontal period of the cylindrical lens 12, the horizontal period of the pixel unit 13, and the opening of the sub-pixel in the pixel unit 13;

[0048] (2) The actual displayed image signal is processed by the human eye contrast sensitivity function to obtain a human-eye visible image signal. The horizontal axis of the human-eye visible image signal is the ratio of the horizontal period of the cylindrical lens 12 to the horizontal period of the pixel unit 13, and the vertical axis of the human-eye visible image signal is the moiré width. The relationship between the moiré width and the ratio of the horizontal period of the cylindrical lens 12 to the horizontal period of the pixel unit 13 can be obtained from the human-eye visible image signal. According to some embodiments of the present invention, after the above steps, the calculation results of the relationship between the moiré width and the optimal viewing surface are basically consistent with the measured results. Thus, the relevant parameters that the 3D display device can simultaneously meet bidirectional viewing, low crosstalk, and no moiré are selected.

[0049] According to some embodiments of the present invention, step (1) further includes: obtaining the image signal of the pixel unit 13 and the image signal of the cylindrical lens 12 based on the horizontal period of the cylindrical lens 12, the horizontal period of the pixel unit 13 and the opening of the sub-pixel in the pixel unit 13, and then multiplying the image signal of the pixel unit 13 and the image signal of the cylindrical lens 12 to obtain the actual displayed image signal.

[0050] According to some embodiments of the present invention, in step (1), the cylindrical lens 12 is equivalent to a grating, and the horizontal period of the cylindrical lens 12 is equivalently scaled according to the distance between the cylindrical lens 12 and the display panel 11 and the optimal viewing surface.

[0051] According to some embodiments of the present invention, a support layer 14 is provided between the display panel 11 and the lens array. Specifically, the method of forming the support layer 14, its specific shape and size, and its material are not particularly limited, and those skilled in the art can design it according to actual needs. This ensures the spacing between the cylindrical lens 12 and the pixels, and especially for 3D display devices 1 with large screens or 3D display devices 1 containing touchscreens, the support layer 14 can prevent the cylindrical lens 12 from collapsing.

[0052] Example 1

[0053] With a viewing angle of 300mm as the optimal focal length, a pixel period horizontal width of 19.5µm, and a main lobe angle of 24.45°, the smallest resolvable pixel size by the human eye is 87µm. (Reference) Figure 10 When the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit is between 2.75 and 3, the moiré width is smaller than the smallest resolvable size by the human eye. Therefore, the horizontal period of the cylindrical lens should be selected within this range. To further improve resolution, the number of viewpoints within a main lobe can be 30, 14, or 20, corresponding to cylindrical lens apertures of 37.61 μm, 38.61 μm, and 39.40 μm, and focal lengths of 122.73 μm, 126.00 μm, and 128.57 μm, respectively.

[0054] Example 2

[0055] With a 360mm viewing angle as the optimal viewing surface, a pixel period horizontal width of 19.5µm, and a main lobe angle of 20.47°, the smallest resolvable pixel size by the human eye is 101.8µm. (Reference) Figure 11When the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit is [2, 2.37], [2.79, 2.86], [3.5, 3.55], or [4.16, 4.32], the moiré pattern width is less than the minimum size that the human eye can distinguish. Therefore, the horizontal period of the cylindrical lens should be selected within this range. A relatively large horizontal period of the cylindrical lens is preferred, i.e., a ratio of [4.16, 4.32] is preferred. However, considering that when the ratio is greater than 4, the size of the cylindrical lens exceeds the minimum size that the human eye can distinguish at 300mm, which may lead to a reduction in the 3D viewing space, the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit can be selected between [3.5, 3.55]. At this point, the number of viewpoints within a main lobe can be 102, 60, or 46, corresponding to cylindrical lens apertures of 48.50μm, 48.67μm, and 48.79μm, and focal lengths of 158.28μm, 158.82μm, and 159.23μm, respectively.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A 3D display device, characterized in that, include: The display panel has a first direction for the extension of its long side and a second direction for the extension of its short side, and the display panel has a plurality of pixel units arranged in an array. A lens array is disposed on one side of the light-emitting direction of the display panel. The lens array includes a plurality of cylindrical lenses arranged along the first direction, wherein the long axis of the cylindrical lenses extends in a direction intersecting the second direction. The extension direction of the major axis of the cylindrical lens forms an angle α with the second direction. The aperture of the cylindrical lens is a, the horizontal period of the pixel unit is b, and the number of pixel units corresponding to one cylindrical lens is c, satisfying c=a / (bcosα).

2. The 3D display device according to claim 1, characterized in that, The column direction of the pixel units is parallel to the extension direction of the long axis of the cylindrical lens.

3. The 3D display device according to claim 1 or 2, characterized in that, 40°≤α≤50°。 4. The 3D display device according to claim 3, characterized in that, The extension direction of the long axis of the cylindrical lens forms an angle α with the second direction, and α = 45°.

5. The 3D display device according to claim 3, characterized in that, The ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit satisfies the following condition: the width of the moiré pattern corresponding to the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit is less than the smallest size that the human eye can distinguish. The method for obtaining the relationship between the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit and the width of the moiré pattern includes: (1) Obtain the actual displayed image signal based on the horizontal period of the cylindrical lens, the horizontal period of the pixel unit, and the opening of the sub-pixel in the pixel unit; (2) The actual displayed image signal is processed by the human eye contrast sensitivity function to obtain a human eye-visible image signal. The horizontal axis of the human eye-visible image signal is the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit, and the vertical axis of the human eye-visible image signal is the moiré width. Step (1) further includes: obtaining the image signal of the pixel unit and the image signal of the cylindrical lens based on the horizontal period of the cylindrical lens, the horizontal period of the pixel unit and the opening of the sub-pixel in the pixel unit, and then multiplying the image signal of the pixel unit and the image signal of the cylindrical lens to obtain the actual displayed image signal.

6. The 3D display device according to claim 1, characterized in that, When the number of pixel units corresponding to multiple consecutive cylindrical lenses is an integer for the first time, it represents the number of viewpoints within the main lobe's field of view.

7. The 3D display device according to claim 1 or 2, characterized in that, Also includes: A support layer is disposed between the lens array and the display panel.

8. A method for manufacturing a 3D display device according to any one of claims 1 to 7, characterized in that, include: A display panel is provided, wherein the long side of the display panel extends in a first direction and the short side of the display panel extends in a second direction, and a plurality of pixel units arranged in an array are disposed within the display panel. A lens array is provided on one side of the light-emitting direction of the display panel. The lens array includes a plurality of cylindrical lenses arranged along the first direction and extending along the second direction. The extension direction of the long axis of the cylindrical lenses intersects the second direction.

9. The method according to claim 8, characterized in that, When forming the periodically arranged cylindrical lenses and the periodically arranged pixel units, the ratio of the horizontal period of the cylindrical lenses to the horizontal period of the pixel units satisfies the following condition: the width of the moiré pattern corresponding to the ratio of the horizontal period of the cylindrical lenses to the horizontal period of the pixel units is less than the smallest size that the human eye can distinguish. The method for obtaining the relationship between the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit and the width of the moiré pattern includes: (1) Obtain the actual displayed image signal based on the horizontal period of the cylindrical lens, the horizontal period of the pixel unit, and the opening of the sub-pixel in the pixel unit; (2) The actual displayed image signal is processed by the human eye contrast sensitivity function to obtain a human eye-visible image signal. The horizontal axis of the human eye-visible image signal is the ratio of the horizontal period of the cylindrical lens to the horizontal period of the pixel unit, and the vertical axis of the human eye-visible image signal is the moiré width. Step (1) further includes: obtaining the image signal of the pixel unit and the image signal of the cylindrical lens based on the horizontal period of the cylindrical lens, the horizontal period of the pixel unit and the opening of the sub-pixel in the pixel unit, and then multiplying the image signal of the pixel unit and the image signal of the cylindrical lens to obtain the actual displayed image signal.

10. The method according to claim 9, characterized in that, In step (1), the cylindrical lens is equivalent to a grating, and the horizontal period of the cylindrical lens is equivalently scaled according to the distance between the cylindrical lens and the display panel and the optimal viewing surface.

11. The method according to claim 9, characterized in that, A support layer is provided between the display panel and the lens array.

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