Stereoscopic display device

Abstract

The invention provides a stereoscopic display device. The stereoscopic display device comprises a light guide module which is configured to diffuse incident light; the display module is provided with a preset multi-view pixelated pattern and is configured to receive the light rays emitted by the light guide module and load information of the multi-view pixelated pattern to the light rays to form modulated light rays; the optical device module is positioned on one side, far away from the light guide module, of the display module, and is configured to reflect the modulated light rays emitted by the display module and enable the modulated light rays to converge outside the stereoscopic display device to form a plurality of viewpoints; the multiple viewpoints and the light guide module are located on the same side of the display module. The three-dimensional display device can increase the field angle, shorten the focal length, achieve a more excellent three-dimensional display effect and reduce power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of stereoscopic display, and particularly to a stereoscopic display device. Background Art

[0002] Traditional images are only carriers of two-dimensional information, and the presented content ignores depth information such as the distance of objects. With the rapid development of science and technology, traditional images can no longer meet the requirements of "depth level" in many application fields. Therefore, stereoscopic display technology containing three-dimensional information has received great attention.

[0003] DTI Company in the United States has developed a series of autostereoscopic liquid crystal displays called "Virtual Window" through long-term research and accumulation in optics, electronics, visual psychology, computer software, and many other key disciplines. The parallax emission grating scheme is adopted, and the projection direction of light is controlled by a special optical device and an emission grating behind the liquid crystal display screen. Philips Company has been focusing on the development of autostereoscopic display technology based on lenticular gratings. To provide high-quality autostereoscopic display effects, the company has specifically developed a set of display technologies, including multi-viewpoint lens technology, tilted lens technology, dual modes, etc., to achieve a relatively high level of autostereoscopic display.

[0004] However, currently, most naked-eye stereoscopic display devices almost all achieve stereoscopic imaging based on the transmissive principle, with a small viewing angle and a large total thickness, which is not conducive to the integration and packaging of naked-eye stereoscopic display devices. Summary of the Invention

[0005] Based on this, the present invention aims to provide an improved stereoscopic display device to solve at least one of the above problems.

[0006] In a first aspect, the present application provides a stereoscopic display device, including:

[0007] A light guide module configured to diffuse incident light;

[0008] A display module having a preset multi-viewpoint pixelated pattern, configured to receive the light emitted from the light guide module and load the information of the multi-viewpoint pixelated pattern onto the light to form modulated light;

[0009] An optical device module located on the side of the display module away from the light guide module, configured to reflect the modulated light emitted from the display module and converge the modulated light into multiple viewpoints outside the stereoscopic display device;

[0010] Wherein, the multiple viewpoints and the light guide module are on the same side of the display module.

[0011] For the above-mentioned stereoscopic display device, the optical device module can reflect the modulated light emitted by the display module and converge the modulated light into multiple viewpoints outside the stereoscopic display device, thereby facilitating the improvement of the problems of small viewing angle and long focal length of the stereoscopic display device based on the transmissive stereoscopic imaging principle, and further contributing to the integrated packaging of the autostereoscopic display device; moreover, by introducing a front light guide module to diffuse the incident light, it is beneficial to match the reflective panel display technology to achieve a more uniform light intensity distribution, thereby achieving a more excellent stereoscopic display effect; in addition, the display module can form modulated light carrying multi-viewpoint pixelated pattern information through external light without the need to additionally set up a backlight module. Therefore, the above-mentioned stereoscopic display device can also save power to a certain extent.

[0012] In one embodiment, it further includes: a light source located on at least one side of the light guide module, configured to be turned on when the ambient light intensity is less than or equal to a preset value to provide supplementary light to the light guide module.

[0013] In one embodiment, it further includes: a controller electrically connected to the light source, configured to control the light source to be turned on when detecting that the ambient light intensity is less than or equal to the preset value.

[0014] In one embodiment, the light guide module has a plurality of light guide microstructures, and the light guide microstructures are configured to make the total internal reflection propagation condition of the light incident on the light guide microstructures not hold in the light guide module and emit from the light guide module.

[0015] In one embodiment, the light guide module includes a light guide plate, and the light guide microstructures are uniformly distributed on the plane where the light guide plate is located.

[0016] In one embodiment, the multi-viewpoint pixelated pattern has a plurality of periodically arranged combined pixels, and the combined pixels have at least two sub-pixels; wherein, the number of sub-pixels in the combined pixels is the same as the number of viewpoints.

[0017] In one embodiment, the optical device module includes a lenticular grating, the lenticular grating has a plurality of lenticular lens units, and the lenticular lens units have a first surface and a second surface with a non-zero curvature arranged oppositely, wherein the first surface is located between the display module and the second surface, and a reflective layer is provided on the second surface.

[0018] In one embodiment, the focal length of the lenticular lens unit is less than or equal to 500 micrometers.

[0019] In one embodiment, the optical device module includes a microlens array having a plurality of microlens units periodically arranged in at least two directions. Each microlens unit has a third surface and a fourth surface with a non-zero curvature, where the third surface is located between the display module and the fourth surface, and a reflective layer is disposed on the fourth surface.

[0020] In a second aspect, the present application provides a stereoscopic display device capable of forming multiple viewpoints on its viewing side, including: a light guide module disposed close to the viewing side and configured to diffuse incident light; a display module located on a side of the light guide module away from the viewing side, having a preset multi-viewpoint pixelated pattern and configured to receive the light emitted from the light guide module and load the information of the multi-viewpoint pixelated pattern onto the light to form modulated light; and an optical device module located on a side of the display module away from the light guide module and configured to reflect the modulated light emitted from the display module and cause the modulated light to form the multiple viewpoints on the viewing side.

[0021] For the above stereoscopic display device, the optical device module can reflect the modulated light emitted from the display module and cause the modulated light to converge into multiple viewpoints outside the stereoscopic display device, thereby facilitating the improvement of the problems of small viewing angle and long focal length of the stereoscopic display device based on the transmissive stereoscopic imaging principle, and further contributing to the integrated packaging of the naked-eye stereoscopic display device; moreover, by disposing the light guide module close to the viewing side, it is beneficial to match the reflective panel display technology, so as to diffuse the incident light to achieve a more uniform outgoing light intensity distribution; in addition, the display module can form modulated light carrying the information of the multi-viewpoint pixelated pattern through external light without the need to additionally provide a backlight module. Therefore, the above stereoscopic display device can also save power to a certain extent. Description of the Drawings

[0022] In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present specification. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic optical path diagram of a stereoscopic display device according to an embodiment of the present application;

[0024] Figure 2 It is a schematic diagram of a cylindrical lens grating of an optical device module according to an embodiment of the present application;

[0025] Figure 3Schematic diagram of the microlens array of an optical device module according to an embodiment of the present application;

[0026] Figure 4(a) is a ray tracing diagram of a stereoscopic display device based on a reflective cylindrical lens grating;

[0027] Figure 4(b) is a ray tracing diagram of a stereoscopic display device based on a transmissive cylindrical lens grating.

[0028] Description of component labels:

[0029] 100, stereoscopic display device;

[0030] 10, light guide module, 20, display module, 30, optical device module, 31, cylindrical lens grating, 311, cylindrical lens unit, 3111, first surface, 3112, second surface, 32, microlens array, 321, microlens unit, 3211, third surface, 3212, fourth surface, 40, light source. Detailed implementation manners

[0031] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0034] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0035] An embodiment of the present application provides a stereoscopic display device, which realizes the angular separation of pixelated light through reflection, and combines a light guide module to diffuse the incident light, further expanding the viewing angle and achieving a more excellent stereoscopic display effect.

[0036] As Figure 1 As shown, an embodiment of the present application provides a stereoscopic display device 100, including: a light guide module 10 configured to diffuse the incident light; a display module 20 having a preset multi-viewpoint pixelated pattern, configured to receive the light emitted from the light guide module and load the information of the multi-viewpoint pixelated pattern onto the light to form modulated light; and an optical device module 30 located on the side of the display module 20 away from the light guide module, configured to reflect the modulated light emitted from the display module and converge the modulated light into multiple viewpoints outside the stereoscopic display device.

[0037] To achieve a stereoscopic display effect, the left and right eyes of the observer need to receive image light with different parallax information respectively and form a stereoscopic display through brain fusion. Taking natural light as an example, after the natural light enters the stereoscopic display device 100, it can enter the display module 20 after being diffused by the light guide module 10, and after being modulated by the display module 20, it carries the information of the multi-viewpoint pixelated pattern of the display module 20 to form modulated light and enters the optical device module 30. Then, after being reflected by the optical device module 30, it propagates to the outside of the stereoscopic display device 100 and converges into multiple viewpoints. Within the viewing field range of the multiple viewpoints, the left and right eyes of the observer receive the images of any two viewpoints, and a stereoscopic effect can be perceived through brain fusion.

[0038] Among them, the optical device module 30 may include a plurality of periodically arranged optical elements, and each optical element may be correspondingly set with one or more groups of pixels in the multi-viewpoint pixelated pattern to reflect the modulated light modulated by the one or more groups of pixels.

[0039] Taking Figure 4 as an example, Figure 4(a) shows the ray tracing of a stereoscopic display device based on a reflective cylindrical lens grating, and Figure 4(b) shows the ray tracing of a stereoscopic display device based on a transmissive cylindrical lens grating. Among them, the characteristic period of the cylindrical lens grating is designed to be 120 microns, the sagittal height is 8 microns, and the refractive index is 1.51. It can be seen that for the reflective cylindrical lens grating, its focal plane is located between the observation side and the reflective surface of the reflective cylindrical lens grating, and the focal length of the reflective cylindrical lens unit is about 106.5 microns. For the transmissive cylindrical lens grating, its focal plane is located on the side of the transmissive surface of the transmissive cylindrical lens away from the observation side, and the focal length of the transmissive cylindrical lens unit is 670 microns. Thus, it can be known that the focal length of the reflective cylindrical lens unit is significantly smaller than that of the transmissive cylindrical lens unit. On the other hand, the field of view angle of an optical element can be approximately expressed as the angle subtended by the focus of the optical element to the upper and lower edges of the optical element. Thus, combining Figure 4, it can be seen that the field of view angle of the reflective cylindrical lens unit is significantly larger than that of the transmissive cylindrical lens unit. Furthermore, it can be known that the field of view angle of the stereoscopic display device based on the reflective stereoscopic imaging principle is larger than that of the stereoscopic display device based on the transmissive stereoscopic imaging principle.

[0040] Exemplarily, multiple viewpoints are located on the side of the light guide module 10 away from the display module 20. That is to say, the modulated light will pass through the entire stereoscopic display device 100 to form multiple converging viewpoints in space.

[0041] Exemplarily, the display module 20 can be an ink screen or a liquid crystal screen, etc.

[0042] Exemplarily, the reflection characteristics of the optical device module 30 can be achieved by coating a reflective film on the reflective surface of the optical device module 30. For example, a metal reflective film and / or a dielectric reflective film can be coated.

[0043] For the above-mentioned stereoscopic display device 100, the optical device module 30 can reflect the modulated light emitted by the display module 20 and make the modulated light converge into multiple viewpoints outside the stereoscopic display device 100. Thus, it is beneficial to improve the problems of small field of view angle and long focal length of the stereoscopic display device based on the transmissive stereoscopic imaging principle, and further contributes to the integrated packaging of the naked-eye stereoscopic display device; and, by introducing a front light guide module to diffuse the incident light, it is beneficial to achieve a more uniform light intensity distribution, thereby achieving a more excellent stereoscopic display effect; in addition, the display module 20 can form modulated light carrying multi-viewpoint pixelated pattern information through external light without additionally setting a backlight module. Therefore, the stereoscopic display device 100 can also save power to a certain extent.

[0044] In some embodiments of the present application, continue to refer to Figure 1, the stereoscopic display device 100 further includes a light source 40, which is located on at least one side of the light guide module 10 and is configured to be turned on when the ambient light intensity is less than or equal to a preset value, so as to provide supplementary light rays to the light guide module 10. It can be understood that based on the light guide method of front light guide, light can be directly guided when the sunlight is strong (i.e., natural light is strong), and light can also be guided after turning on the light source 40 to provide supplementary light rays to the light guide module 10 when the sunlight is weak. In this way, regardless of whether the surrounding environment is bright or dark, it can be ensured that the stereoscopic display device 100 has a large viewing angle and a bright stereoscopic display effect.

[0045] Optionally, as Figure 1 shown, the light source 40 is located on the right side of the light guide module 10. Of course, the light source 40 can also be located on the left side of the light guide module 10. Optionally, the light source 40 can also be located in the upper right of the light guide module 10. Optionally, the light source 40 can also be adjacent to the side of the light guide module 10. Specifically, it can be set according to the actual supplementary light requirements of the stereoscopic display device 100, and the present application does not limit this. Optionally, the light source 40 includes a point light source, a line light source or a surface light source, for example, it can be an LED line array light source.

[0046] Furthermore, the stereoscopic display device 100 further includes a controller (not shown in the figure), which is electrically connected to the light source 40 and is configured to control the light source 40 to turn on when it detects that the ambient light intensity is less than or equal to the preset value. In this way, it is beneficial to enable the stereoscopic display device 100 to automatically perform a supplementary light action according to the ambient light intensity, and improve the ambient adaptability of the stereoscopic display device 100. Optionally, the stereoscopic display device 100 further includes an ambient light sensor for detecting the ambient light intensity and electrically connected to the controller, so that the controller can judge whether the ambient light intensity is less than or equal to the preset value according to the sensing signal of the ambient light sensor, and control the light source 40 to turn on when it is determined that the ambient light intensity is less than or equal to the preset value. Optionally, the stereoscopic display device 100 may not be provided with an ambient light sensor to reduce the manufacturing cost. At this time, the controller can control the light source 40 to turn on based on the user's operation, and the present application does not limit this.

[0047] In some embodiments of the present application, the light guide module 10 has a plurality of light guide microstructures, which are configured to cause the total internal reflection propagation condition of the light incident on the light guide microstructures in the light guide module not to hold, so that the light exits from the light guide module. When the light source 40 performs supplementary lighting, it can provide supplementary lighting light incident at a specific angle to the light guide module 10, and this supplementary lighting light can propagate in the light guide module 10 based on the total internal reflection propagation condition. By setting a plurality of light guide microstructures, the total internal reflection propagation condition of the light incident on the light guide microstructures in the light guide module 10 can be destroyed, so that the light escapes from the light guide module 10, achieving the diffusion effect of the light. On the other hand, when there is no supplementary lighting, a part of the natural light can pass through the light guide module 10 and enter the display module 20, and even if a part of the natural light propagates in the light guide module 10 in the form of total internal reflection, it can also exit from the light guide module 10 through the light guide microstructures.

[0048] Optionally, the distribution density of the light guide microstructures can be set according to the actual display requirements of the stereoscopic display device 100. For example, in order to obtain a more consistent display effect at different viewing angles, the distribution density of the light guide microstructures can be set to be appropriately denser. For another example, in order to control the manufacturing cost of the light guide plate, the distribution density of the light guide microstructures can also be set to be appropriately sparser.

[0049] Furthermore, the light guide module 10 includes a light guide plate, and the light guide microstructures are uniformly distributed on the plane where the light guide plate is located. In this way, it is beneficial to obtain a more uniform stereoscopic display effect in terms of light intensity. Optionally, the light guide microstructures can be uniformly distributed on the upper surface of the light guide plate (the surface away from the display module 20), inside the light guide plate, and the lower surface of the light guide plate (the surface close to the display module 20). Optionally, the light guide microstructures can be periodically distributed on the plane where the light guide plate is located along at least one direction.

[0050] In some embodiments of the present application, the light guide microstructures can be one of small holes, micro-refraction platforms, micro-prisms, micro-lenses, and free-form surface lenses. Optionally, as Figure 1 shown, in order to achieve uniform light output downward for the entire image, the above structure can be adjusted or a special optical film can be added between the light guide module 10 and the display module 20 to transform the light incident on the display module 20 into a collimated beam propagating downward.

[0051] In some embodiments of the present application, the multi-viewpoint pixelated pattern has a plurality of periodically arranged combined pixels, and the combined pixels have at least two sub-pixels; wherein, the number of sub-pixels in the combined pixels is the same as the number of viewpoints. As Figure 1As shown, the combined pixel has sub-pixels 1, 2, 3, and 4, and is periodically arranged along at least one direction of the display module 20. By inserting the image pixels of viewpoints 1, 2, 3, and 4 at the positions of the 4 sub-pixels respectively, the 4 image pixels can be combined into a combined viewpoint pixel map based on the combined pixel according to the pixel arrangement. At this time, all the light modulated by sub-pixel 1 can be reflected by the optical device module 30 and converge at a certain place in space through the entire stereoscopic display device 100 to form viewpoint 1, all the light modulated by sub-pixel 2 can be reflected by the optical device module 30 and converge at a certain place in space through the entire stereoscopic display device 100 to form viewpoint 2, all the light modulated by sub-pixel 3 can be reflected by the optical device module 30 and converge at a certain place in space through the entire stereoscopic display device 100 to form viewpoint 3, all the light modulated by sub-pixel 4 can be reflected by the optical device module 30 and converge at a certain place in space through the entire stereoscopic display device 100 to form viewpoint 4. The observer can receive any 2 viewpoint images with the left and right eyes within the viewing range of viewpoints 1 to 4 and fuse them to perceive the stereoscopic imaging effect.

[0052] In some embodiments of the present application, as Figure 2 shown, the optical device module 30 includes a lenticular grating 31, the lenticular grating 31 has a plurality of lenticular lens units 311, the lenticular lens units 311 have a first surface 3111 and a second surface 3112 with a non-zero curvature that are oppositely arranged, wherein the first surface 3111 is located between the display module 20 and the second surface 3112, and a reflective layer is provided on the second surface 3112. Among them, each lenticular lens unit 311 does not converge light in the direction perpendicular to its arrangement direction, and each lenticular lens unit 311 acts as a converging lens to focus light and form an image in its arrangement direction. It should be noted that the characteristic that the first surface 3111 of the lenticular lens unit 311 is its focal plane enables the lenticular lens unit 311 to have the functions of "compressing" and "isolating" the image. In addition, providing a reflective layer on the second surface 3112 with a non-zero curvature is also beneficial to modulating the convergence of light.

[0053] Further, the focal length of the cylindrical lens unit 311 is less than or equal to 500 microns. For example, the focal length of the cylindrical lens unit 311 can be 100 microns, 200 microns, 300 microns, 400 microns, 500 microns, and can be specifically set based on the overall thickness of the device. Further, the focal length of the cylindrical lens unit 311 can be less than or equal to 120 microns. For example, the focal length of the cylindrical lens unit 311 can be 90 microns, 100 microns, 105 microns, 110 microns, 115 microns. As shown in FIG. 4(a), the characteristic period of the cylindrical lens grating 31 is designed to be 120 microns, the sagitta is 8 microns, the refractive index is 1.51, and the focal length of the cylindrical lens unit 311 is approximately 106.5 microns. Compared with the traditional transmissive cylindrical lens grating, as shown in FIG. 4(b), the focal length of the transmissive cylindrical lens unit can reach 670 microns, which is much larger than the reflective cylindrical lens unit 311 of the present application. Since the liquid crystal plane (display module) is arranged near the focal plane, therefore, the reflective cylindrical lens unit 311 of the present application is beneficial to the integrated packaging of the display device to realize a module integration with a smaller thickness.

[0054] In some embodiments of the present application, as Figure 3 shown, the optical device module 30 includes a microlens array 32. The microlens array 32 has a plurality of microlens units 321 arranged periodically along at least two directions. The microlens unit 321 has a relatively arranged third surface 3211 and a fourth surface 3212 with a non-zero curvature. The third surface 3211 is located between the display module 20 and the fourth surface 3212, and a reflective layer is provided on the fourth surface 3212. Since the microlens array 32 is arranged periodically along at least two directions, compared with the cylindrical lens grating 31, a three-dimensional display in one more direction can be achieved. That is to say, the microlens array 32 can form a multi-viewpoint distribution not only in the horizontal direction but also in the vertical direction, making the naked-eye three-dimensional display effect of the three-dimensional display device 100 better.

[0055] The embodiments of the present application further provide a three-dimensional display device, which can form a plurality of viewpoints on its viewing side, including: a light guide module, arranged close to the viewing side, configured to diffuse incident light; a display module, located on one side of the light guide module away from the viewing side, having a preset multi-viewpoint pixelated pattern, configured to receive the light emitted by the light guide module and load the information of the multi-viewpoint pixelated pattern onto the light to form modulated light; an optical device module, located on one side of the display module away from the light guide module, configured to reflect the modulated light emitted by the display module and make the modulated light form a plurality of viewpoints on the viewing side.

[0056] For the above-mentioned stereoscopic display device, the optical device module can reflect the modulated light emitted by the display module and converge the modulated light into multiple viewpoints outside the stereoscopic display device, thereby facilitating the improvement of the problems of small viewing angle and long focal length of the stereoscopic display device based on the transmissive stereoscopic imaging principle, and further contributing to the integrated packaging of the autostereoscopic display device; moreover, setting the light guide module close to the viewing side is conducive to matching the reflective panel display technology, thereby diffusing the incident light to achieve a more uniform outgoing light intensity distribution; in addition, the display module can form modulated light carrying multi-viewpoint pixelated pattern information through external light without the need to additionally set up a backlight module. Therefore, the above-mentioned stereoscopic display device can also save power to a certain extent.

[0057] For the detailed settings of the components of the stereoscopic display device in this embodiment, reference may be made to the description in the foregoing embodiment, which will not be elaborated here.

[0058] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0059] The above-mentioned embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A stereoscopic display device, characterized in that, it comprises: a light guide module configured to diffuse incident light; a display module having a preset multi-viewpoint pixelated pattern, configured to receive the light emitted from the light guide module and load the information of the multi-viewpoint pixelated pattern onto the light to form modulated light; an optical device module located on a side of the display module away from the light guide module, configured to reflect the modulated light emitted from the display module and converge the modulated light outside the stereoscopic display device to form multiple viewpoints; wherein the multiple viewpoints and the light guide module are on the same side of the display module.

2. The stereoscopic display device according to claim 1, characterized in that, it further comprises: a light source located on at least one side of the light guide module, configured to be turned on when the ambient light intensity is less than or equal to a preset value to provide supplementary light to the light guide module.

3. The stereoscopic display device according to claim 2, characterized in that, it further comprises: a controller electrically connected to the light source, configured to control the light source to be turned on when detecting that the ambient light intensity is less than or equal to the preset value.

4. The stereoscopic display device according to any one of claims 1 to 3, characterized in that, the light guide module has a plurality of light guide microstructures, and the light guide microstructures are configured to cause the total internal reflection propagation condition of the light incident on the light guide microstructures in the light guide module not to hold and the light to exit from the light guide module.

5. The stereoscopic display device according to claim 4, characterized in that, the light guide module includes a light guide plate, and the light guide microstructures are uniformly distributed on the plane where the light guide plate is located.

6. The stereoscopic display device according to claim 1, characterized in that, the multi-viewpoint pixelated pattern has a plurality of periodically arranged combined pixels, and the combined pixels have at least two sub-pixels; wherein the number of sub-pixels in the combined pixels is consistent with the number of viewpoints.

7. The stereoscopic display device according to claim 1, characterized in that, the optical device module includes a lenticular grating, the lenticular grating has a plurality of lenticular lens units, the lenticular lens units have a first surface and a second surface with a non-zero curvature arranged opposite to each other, wherein the first surface is located between the display module and the second surface, and a reflective layer is provided on the second surface.

8. The stereoscopic display device according to claim 7, characterized in that, the focal length of the lenticular lens unit is less than or equal to 500 micrometers.

9. The stereoscopic display device according to claim 1, characterized in that, the optical device module includes a microlens array, the microlens array has a plurality of microlens units periodically arranged along at least two directions, the microlens units have a third surface and a fourth surface with a non-zero curvature arranged opposite to each other, wherein the third surface is located between the display module and the fourth surface, and a reflective layer is provided on the fourth surface.

10. A stereoscopic display device capable of forming multiple viewpoints on its viewing side, characterized in that, it comprises: A light guide module, disposed near the observation side, configured to diffuse incident light; A display module, located on a side of the light guide module away from the observation side, having a preset multi-viewpoint pixelated pattern, configured to receive the light emitted from the light guide module and load the information of the multi-viewpoint pixelated pattern onto the light to form modulated light; An optical device module, located on a side of the display module away from the light guide module, configured to reflect the modulated light emitted from the display module and cause the modulated light to form the plurality of viewpoints on the observation side.

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