Naked eye three-dimensional display device

Abstract

The utility model discloses a naked eye three-dimensional display device. The naked eye three-dimensional display device comprises a camera obscura, a convergent lens, at least two image display parts and a backlight source, the first side of the camera obscura is provided with an external view window, and the convergent lens is fixed in the external view window; the backlight source is arranged on the second side of the camera obscura, the light-emitting surface of the backlight source faces the outer view window, and the first side and the second side are oppositely arranged; the at least two image display parts are stacked in the direction from the first side to the second side, and different image display parts are provided with images with different depths of field; wherein the farther the distance from the external view window is, the larger the depth of field of the image in the image display part is. The technical scheme of the utility model can realize three-dimensional display, has abundant hierarchical depth of field, restores a real scene, has a lighting function, and solves the problems of complex structure, high cost, obvious grid influence during virtual image observation, difficulty in marketization and the like in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of stereoscopic display, in particular to a naked-eye stereoscopic display device. Background Art

[0002] Existing night lights with three-dimensional scenery mainly use multiple scenery pictures plus the light source behind to form a three-dimensional display device with multiple layers of depth of field and lighting function, which is mostly used for advertisements, atmosphere lights, interior decoration, etc. However, this kind of landscape lighting decoration has a very limited depth of field due to the limited size of the entire device and all the pictures are inserted in the box, without the 3D stereoscopic sense and the real experience of being in the real scene.

[0003] In a certain prior art, a circuit driving system is used to switch between shallow, medium and distant scenes. At the same time, the position of the driving component needs to be constantly changed and the position accuracy is required to be high. Considering the visual temporary storage effect, the human eye can see the shallow, medium and distant scenes at the same time, so the driving component needs to constantly change its position within 0.1s-0.4s. The stability and moving speed of the driving component are required to be very high. The structure is complex and the cost is high, which makes it difficult to commercialize. In another prior art, image information is provided through multiple display screens, where the second and subsequent display screens need to have both display and transmission effects. This screen design is complex, the corresponding display pixels are low, the cost is high, and it is difficult to commercialize. At the same time, the device is not conducive to the 3D display of virtual images. Since the lens arrays are composed of single lenses spliced ​​together, the gaps between the lenses will always be seen when observing the virtual image, which greatly affects the visual effect.

[0004] In the above two prior arts, the stereoscopic display effect is improved by setting multiple display screens or adding driving components, which has a complex structure and high cost, and is not applicable to mid- and low-end products. Utility Model Content

[0005] The utility model provides a naked-eye stereoscopic display device, which can realize stereoscopic display and has rich layered depth of field, restores real scenes and has lighting function, and solves the problems of complex structure, high cost, obvious grid influence when observing virtual images, and difficulty in marketization in the prior art.

[0006] The utility model provides a naked eye stereoscopic display device, comprising a dark box, a converging lens, at least two image display elements and a backlight source;

[0007] An external viewing window is provided on the first side of the dark box, and the converging lens is fixed in the external viewing window;

[0008] The backlight source is arranged on the second side of the dark box, the light emitting surface of the backlight source faces the external viewing window, and the first side is arranged opposite to the second side;

[0009] At least two of the image display elements are stacked in a direction from the first side to the second side, and different image display elements are provided with images with different depths of field;

[0010] The farther the distance from the external viewing window is, the greater the depth of field of the image in the image display element is.

[0011] Optionally, the converging lens includes at least one Fresnel lens.

[0012] Optionally, the focal length of the Fresnel lens is greater than the distance between the image display element and the external viewing window.

[0013] Optionally, at least two card slots are provided in the dark box, and the image display element is replaceable.

[0014] Optionally, it also includes at least one three-dimensional model arranged on a side of at least one of the image display components close to the external viewing window.

[0015] Optionally, it further comprises a reflective light source disposed on a side of at least one of the image display components close to the external viewing window, wherein the reflective light source is fixed on a side wall of the dark box.

[0016] Optionally, a light shielding block is provided at the edge of the external viewing window, and the light shielding block shields direct light from the reflective light source.

[0017] Optionally, the at least two image display elements include a first image display element, a second image display element and a third image display element stacked in a direction from the first side to the second side;

[0018] The depths of field of images of the first image display element, the second image display element, and the third image display element increase in sequence.

[0019] Optionally, the backlight source includes a backlight and a diffusion plate, and the diffusion plate is reused as the image display element.

[0020] Optionally, the backlight source includes any one of a backlight panel, a liquid crystal display, an organic light emitting display or an inorganic light emitting diode display.

[0021] The naked-eye stereoscopic display device provided by the embodiment of the utility model includes a dark box, a converging lens, at least two image display elements and a backlight source; an external viewing window is provided on the first side of the dark box, and the converging lens is fixed in the external viewing window; the backlight source is provided on the second side of the dark box, and the light emitting surface of the backlight source faces the external viewing window, and the first side and the second side are arranged opposite to each other; at least two image display elements are stacked in a direction from the first side to the second side, and different image display elements are provided with images with different depths of field; wherein, the farther the distance from the external viewing window, the greater the depth of field of the image in the image display element. The backlight source emits illumination light, and the illumination light illuminates the image set on the image display element. By setting images with different depths of field on at least two image display elements, and different images are at different distances from the converging lens, the user can see superimposed stereoscopic images with different depths of field when observing through the external viewing window, and the naked-eye stereoscopic display device provided by the embodiment can solve the problems of the prior art such as complex structure, high cost, obvious grid effect when observing virtual images, and difficulty in marketization.

[0022] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic structural diagram of a naked-eye stereoscopic display device is provided for an embodiment of the utility model;

[0025] Figure 2 A schematic structural diagram of another naked-eye stereoscopic display device provided by an embodiment of the utility model;

[0026] Figure 3 A schematic structural diagram of another naked-eye stereoscopic display device provided by an embodiment of the utility model;

[0027] Figure 4 A schematic structural diagram of another naked-eye stereoscopic display device provided by an embodiment of the utility model;

[0028] Figure 5 A schematic structural diagram of another naked-eye stereoscopic display device provided by an embodiment of the utility model;

[0029] Figure 6A schematic structural diagram of another naked-eye stereoscopic display device provided by an embodiment of the utility model;

[0030] Figure 7 for Figure 6 A top view of the central and external viewing windows;

[0031] Figure 8 for Figure 6 The image in the figure shows a schematic top view of the component. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] Figure 1 A schematic diagram of a naked-eye stereoscopic display device is provided for reference. Figure 1 The naked-eye stereoscopic display device provided in this embodiment includes a dark box 10, a converging lens 20, at least two image display elements 30 and a backlight source 40; an external viewing window 101 is provided on the first side A of the dark box 10, and the converging lens 20 is fixed in the external viewing window 101; the backlight source 20 is provided on the second side B of the dark box, and the light emitting surface of the backlight source 20 faces the external viewing window 101, and the first side A and the second side B are arranged opposite to each other; at least two image display elements 30 are stacked along a direction x pointing from the first side A to the second side B, and different image display elements 30 are provided with images with different depths of field; wherein, the farther the distance from the external viewing window 101, the greater the depth of field of the image in the image display element 30.

[0035] The dark box 10 is usually a cubic shell, and the rest of the place is opaque except for the external viewing window 101. The external viewing window 101 is arranged on the first side A (front) of the dark box 10, and the backlight source 40 is arranged inside the second side B (back) of the dark box. The backlight source 40 can be a backlight board, which is composed of lamp beads and a diffusion plate (light uniforming plate, light guide plate, Figure 1 The converging lens 20 has the function of converging light, and can magnify the image of the image display element 30. Moreover, different image display elements 30 are at different distances from the converging lens 20. The user can observe virtual images at different distances through the converging lens 20, such as Figure 1 As shown in virtual image 1 and virtual image 2. Figure 1 In the example, two image display elements 30 are used as an example. In the specific implementation, more image display elements 30 can be set. The more image display elements 30 there are, the richer the depth of field of the displayed image is. The specific implementation can be designed according to the actual situation, and the embodiment of the utility model does not limit this. For example, in the present embodiment, two image display elements 30 are set, a complete picture is selected, the magnification relationship of each image is calculated through composition, and the computer graphics processing software is used to decompose it into two levels of image information of near view and far view, and each level of image is printed on a hard film, or printed on a transparent soft film and then pasted on a transparent sheet; in another embodiment, three image display elements 30 can be set, and the computer graphics processing software is used to decompose it into three levels of image information of near view, middle view and far view, and each level of image is printed on a hard film, or printed on a transparent soft film and then pasted on a transparent sheet.

[0036] The technical solution of the embodiment of the utility model is to emit illumination light through the backlight source, the illumination light illuminates the image set on the image display element, and by setting images with different depths of field on at least two image display elements, the different images are at different distances from the converging lens, so that the user can see superimposed stereoscopic images of different depths of field when observing through the external viewing window. The naked-eye stereoscopic display device provided by this embodiment can solve the problems of the prior art such as complex structure, high cost, obvious grid influence when observing virtual images, and difficulty in commercialization.

[0037] In order to reduce the volume of the naked-eye stereoscopic display device, optionally, the converging lens 20 includes at least one Fresnel lens.

[0038] It is understandable that one side of the lens surface of the Fresnel lens is a smooth surface, and the other side is engraved with concentric circles from small to large, which can effectively reduce the thickness of the lens compared with a convex lens. In this embodiment, the converging lens 20 can use an ultra-thin (thickness is two levels of mm, and the minimum can be less than 1mm) Fresnel lens to avoid the thickness of the external viewing window being too large and avoid the sense of fragmentation of the displayed image. In addition, the Fresnel lens has the advantages of complete graphics, ultra-thin thickness, and good magnification effect. When three image display components are set, the images of the close-up, mid-range, and distant views in the darkroom can be further magnified, and the magnification ratio of the distant view image is the largest, so that a distance much larger than the actual distance of the image can be formed.

[0039] Optionally, the focal length of the Fresnel lens is greater than the distance between the image display element 30 and the external viewing window 101 .

[0040] Among them, the planes where at least two image display elements 30 are located are installed perpendicular to the x-direction and on the inner side of the dark box 10, and maintain a preset position relationship with the external viewing window 101. In order to ensure that the user can see the magnified virtual image of each image display element 30 when observing the dark box 10 through the Fresnel lens, it is necessary to design the focal length of the Fresnel lens to be greater than the distance from each image display element 30 to the external viewing window 101.

[0041] Optionally, in a certain embodiment, at least two card slots are provided in the dark box 10, and the image display element 30 is replaceable.

[0042] Specifically, the image display elements can be one set or several sets, generated according to the positional relationship of the preliminary design, such as one set of landscapes and another set of flowers and birds, etc. By setting a card slot in the dark box 10, they can be replaced through the card slot to achieve the display of multiple sets of display landscapes.

[0043] Figure 2 This is a schematic diagram of the structure of another naked-eye stereoscopic display device provided by an embodiment of the utility model. Figure 2 Optionally, the naked-eye stereoscopic display device further includes at least one stereoscopic model 50 disposed on a side of at least one image display element 30 close to the external viewing window 101 .

[0044] For example, taking the naked-eye stereoscopic display device including three image display elements 30 as an example, the stereoscopic model 50 between the image display elements 30 can be a miniature stereoscopic scene, such as trees, lawns, flowers, insects and birds, etc., which can be combined with a Fresnel lens. Under the action of the Fresnel lens, it can be further magnified to enhance the stereoscopic effect.

[0045] Figure 3 This is a schematic diagram of the structure of another naked-eye stereoscopic display device provided by an embodiment of the utility model. Figure 3Optionally, the naked-eye stereoscopic display device further includes a reflective light source 60 disposed on a side of at least one image display element 30 close to the external viewing window 101, and the reflective light source 30 is fixed on a side wall of the dark box.

[0046] It is understandable that people observe most natural objects by observing reflected light, so that the true color of the object can be truly restored. In this embodiment, each layer of image display element 30 can be equipped with a reflective light source 60 to further improve the display effect, with different levels of depth of field and colorful images. Figure 3 , the reflective light source 60 can be placed in front of each image display element 30, or in other embodiments, a whole light source is installed inside the upper part of the dark box 10, which has a reflective light effect on each image display element 30. Optionally, continue to refer to Figure 3 A light shielding block 70 is disposed at the edge of the external viewing window 101 , and the light shielding block 70 blocks the direct light of the reflective light source 60 to prevent the reflective light source from being directly seen through the external viewing window 101 .

[0047] Optional, continue to refer to Figure 2 or Figure 3 At least two image display elements 30 include a first image display element 31, a second image display element 32 and a third image display element 33 stacked along a direction x from the first side A to the second side B; the depth of field of the images of the first image display element 31, the second image display element 32 and the third image display element 33 increases successively, thereby forming images of various levels such as close-up, mid-range and distant views.

[0048] Figure 4 This is a schematic diagram of the structure of another naked-eye stereoscopic display device provided by an embodiment of the utility model. Figure 4 Optionally, the backlight source 40 includes a backlight 41 and a diffusion plate 42 , and the diffusion plate 42 is multiplexed as an image display element 33 .

[0049] Among them, the picture with the maximum depth of field can be printed on the diffusion plate 42 of the backlight source 40, that is, the diffusion plate 42 is reused as the image display element 33, which is conducive to simplifying the structure and reducing the cost.

[0050] Figure 5 A schematic structural diagram of another naked-eye stereoscopic display device provided in an embodiment of the utility model. Figure 5 In the embodiment shown, by utilizing the secondary imaging principle, multiple Fresnel lenses ( Figure 5In the figure, two Fresnel lenses 21 and 22 are shown as examples. The Fresnel lenses and the image display element are placed at intervals. The depth of field of the mid-range and long-range images of the image display element is further increased by the Fresnel lenses. On the one hand, a stronger three-dimensional effect can be obtained, and at the same time, the overall thickness of the device can be controlled. Similarly, according to different composition requirements, the first image display element can be placed in the front, and one or more Fresnel lenses can be placed in sequence behind it, and another one or more image display elements can be placed at intervals from the Fresnel lenses to present different depths of field and image levels.

[0051] Figure 6 A schematic structural diagram of another naked-eye stereoscopic display device provided by an embodiment of the utility model is shown in FIG. Figure 7 for Figure 6 Schematic diagram of the top view of the middle and outer windows. Figure 8 for Figure 6 The image in the figure shows a schematic top view of the component. Figure 6 to Figure 8 , wherein the converging lens 20 of the external viewing window 101 includes a combination of two Fresnel lenses 23 and 24 with different focal lengths, and contains an image display element 30 inside, and the image of the same image display element 30 contains two images, and the size and position relationship of the images must correspond to the Fresnel lens combination of the external viewing window 101. In this way, even if the actual positions of images 1 and 2 are the same, after being magnified by the Fresnel lenses 23 and 24, the size and depth of field of the virtual images formed by the two are different, and a three-dimensional display can also be formed. Similarly, the Fresnel lens combination of the same layer can be composed of two or more, and the image display element inside the dark box can be composed of one or more and inserted in different positions of the dark box, and the image display element of the same layer is composed of an image that matches the Fresnel lens combination of the external viewing window. In addition, Figure 5 It can be seen that the Fresnel lens combination can also be placed in multiple layers, so that the multiple layers of Fresnel lens combination and the multiple layers of image display elements containing multiple images can form rich depth of field images and form layered three-dimensional images.

[0052] Optionally, in a specific implementation, the backlight source 40 includes any one of a backlight panel, a liquid crystal display, an organic light emitting display or an inorganic light emitting diode display. When the backlight source 40 uses a liquid crystal display, an organic light emitting display or an inorganic light emitting diode display, it can be used to display static distant scenes or dynamic scenes, so that together with the previous layers of pictures, a dynamic three-dimensional display image with a sense of hierarchy is formed.

[0053] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A naked eye stereoscopic display device, characterized in that: It includes a dark box, a converging lens, at least two image display elements and a backlight source; An external viewing window is provided on the first side of the dark box, and the converging lens is fixed in the external viewing window; The backlight source is arranged on the second side of the dark box, the light emitting surface of the backlight source faces the external viewing window, and the first side is arranged opposite to the second side; At least two of the image display elements are stacked in a direction from the first side to the second side, and different image display elements are provided with images with different depths of field; The farther the distance from the external viewing window is, the greater the depth of field of the image in the image display element is.

2. The naked eye stereoscopic display device according to claim 1, characterized in that: The converging lens includes at least one Fresnel lens.

3. The naked eye stereoscopic display device according to claim 2, characterized in that: The focal length of the Fresnel lens is greater than the distance between the image display element and the external viewing window.

4. The naked eye stereoscopic display device according to claim 1, characterized in that: At least two card slots are arranged in the dark box, and the image display element is replaceable.

5. The naked eye stereoscopic display device according to claim 1, characterized in that: It also includes at least one three-dimensional model arranged on a side of at least one of the image display components close to the external viewing window.

6. The naked eye stereoscopic display device according to claim 1, characterized in that: It also includes a reflective light source arranged on a side of at least one of the image display components close to the external viewing window, and the reflective light source is fixed on the side wall of the dark box.

7. The naked eye stereoscopic display device according to claim 6, characterized in that: A light shielding block is arranged at the edge of the external viewing window, and the light shielding block shields the direct light of the reflecting light source.

8. The naked eye stereoscopic display device according to claim 1, characterized in that: At least two of the image display elements include a first image display element, a second image display element, and a third image display element stacked in a direction from the first side to the second side; The depths of field of images of the first image display element, the second image display element, and the third image display element increase in sequence.

9. The naked eye stereoscopic display device according to claim 1, characterized in that: The backlight source includes a backlight lamp and a diffusion plate, and the diffusion plate is multiplexed as the image display element.

10. The naked eye stereoscopic display device according to claim 1, characterized in that: The backlight source includes any one of a backlight panel, a liquid crystal display, an organic light emitting display or an inorganic light emitting diode display.

Images