Display device

Abstract

A display device, comprising a display panel (100), a beam splitter (200), and a retroreflection assembly (300). A first collimating element (400) is arranged between the display panel (100) and the beam splitter (200); emergent light from the display panel (100) is converted into parallel light by means of the first collimating element (400) and parallel light is incident to the beam splitter (200); the beam splitter (200) receives light and reflects same to the retroreflection assembly (300); the retroreflection assembly (300) receives the light reflected by the beam splitter (200) and reflects same to the beam splitter (200); and the light reflected by the retroreflection assembly (300) passes through the beam splitter (200) and is converged to form a real image.

Description

Display device

[0001] This application claims priority to Chinese patent application No. 202311072624.X filed on August 23, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display device. Background Art

[0003] With the rapid development of the 5G era, the concept of "metaverse" will become an important interactive method in the next generation of high-speed information age. VR / AR / MR technology can realize the interaction between virtual and reality through wearable devices, and display devices, as an important component of many interactive devices, have become an indispensable part of communication, exchange, learning, entertainment, shopping, etc.

[0004] Levitational display technology utilizes micro-controlled optical elements to achieve aerial imaging of display devices, without the need for wearable devices. Currently, numerous research results have been achieved both domestically and internationally in this area. Therefore, levitation display technology is poised to play a crucial role in next-generation display devices. SUMMARY OF THE INVENTION

[0005] At present, there are many products at home and abroad that use micro-controlled optical elements for aerial displays. The design principles and methods are diverse, but there are still some shortcomings. The main ones are that the diffraction of the microstructure will reduce the imaging quality and the brightness loss caused by multiple transflections, which reduces the final aerial image display effect and interactive experience.

[0006] The present application provides a display device, comprising:

[0007] A display panel having a light emitting surface;

[0008] A beam splitter, located on the light-emitting side of the display panel;

[0009] a retroreflective component, located on a side of the beam splitter close to the light-emitting surface;

[0010] In which, a first collimating element is provided between the display panel and the beam splitter, and the outgoing light of the display panel is converted into parallel light by the first collimating element and incident on the beam splitter, the beam splitter receives the light emitted by the first collimating element and reflects it to the retroreflective component, the retroreflective component receives the light reflected by the beam splitter and reflects it to the beam splitter, and the light reflected by the retroreflective component passes through the beam splitter and gathers to form a real image. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below only disclose some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] FIG1 is a schematic diagram showing the principle of a display device provided in an embodiment of the present application;

[0013] Figure 2 is a schematic diagram of the incident light and reflected light paths of the retroreflective component

[0014] FIG3 is a schematic diagram showing the relationship between the incident angle, the exit angle and the offset of the retroreflective component;

[0015] FIG4 is a schematic diagram of the divergence angle of the light emitted from the display panel;

[0016] FIG5 is a schematic structural diagram of a display device provided in an embodiment of the present application;

[0017] FIG6 is a schematic diagram of the actual aperture and effective aperture of a retroreflective component;

[0018] FIG7 is a schematic diagram of the light path of the retroreflective assembly without the first collimating element and a schematic diagram of the light path of the retroreflective assembly with the first collimating element;

[0019] FIG8 is a schematic structural diagram of a display device provided in an embodiment of the present application;

[0020] FIG9 is a schematic diagram of invalid light of a display panel;

[0021] FIG10 is a schematic structural diagram of a display device provided in an embodiment of the present application;

[0022] FIG11 is a schematic structural diagram of a display device provided in an embodiment of the present application;

[0023] FIG12 is a schematic structural diagram of one of the display devices provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0025] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application 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 therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] The present application may repeat reference numerals and / or reference letters in different embodiments. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0027] The present application provides a display device, comprising:

[0028] A display panel having a light emitting surface;

[0029] A beam splitter, located on the light-emitting side of the display panel;

[0030] a retroreflective component, located on a side of the beam splitter close to the light-emitting surface;

[0031] In which, a first collimating element is provided between the display panel and the beam splitter, and the outgoing light of the display panel is converted into parallel light by the first collimating element and incident on the beam splitter, the beam splitter receives the light emitted by the first collimating element and reflects it to the retroreflective component, the retroreflective component receives the light reflected by the beam splitter and reflects it to the beam splitter, and the light reflected by the retroreflective component passes through the beam splitter and gathers to form a real image.

[0032] In an optional embodiment of the present application, the display device further includes a second collimating element, which is located on a side of the beam splitter away from the first collimating element, wherein the light reflected by the retroreflective component passes through the beam splitter and is incident on the second collimating element, and the light emitted by the second collimating element is gathered to form a real image.

[0033] In an optional embodiment of the present application, the first collimating element and the second collimating element are at least one of a curved lens and a flat lens.

[0034] In an optional embodiment of the present application, both the first collimating element and the second collimating element are transparent spheres.

[0035] In an optional embodiment of the present application, the light emitting surface of the display panel includes a display area, the projection of the first collimating element on the display panel covers the display area, and the second collimating element and the first collimating element are symmetrically arranged with respect to the beam splitter.

[0036] In an optional embodiment of the present application, the first collimating element is arranged on the light emitting surface of the display panel.

[0037] In an optional embodiment of the present application, the first collimating element includes a plurality of micro lenses, the micro lens array is arranged on the light emitting surface of the display panel, and the micro lenses include convex lenses.

[0038] In an optional embodiment of the present application, the display panel includes a plurality of pixel units, and the orthographic projection of one microlens on the display panel covers one pixel unit.

[0039] In an optional embodiment of the present application, the first collimating element is an anti-peeping structure or an anti-peeping film.

[0040] In an optional embodiment of the present application, the display panel, the beam splitter and the retroreflective component are arranged in a triangle.

[0041] The beneficial effects of this application are:

[0042] The present application provides a display device. The display device provided by the present application sets a first collimating element between the light-emitting side of the display panel and the beam splitter, and uses the first collimating element to adjust the path of the light emitted by the display panel, so as to narrow the angle of the light emitted by the display panel with a large divergence angle, thereby increasing the proportion of effective light incident on the retroreflective component, improving the light efficiency, and then improving the aerial imaging quality of the display device, thereby improving the user experience.

[0043] The floating display technology is a technology that uses micro-controlled optical elements to achieve aerial imaging of the display device.

[0044] As shown in Figure 1, it is a schematic diagram of the principle of a display device provided in an embodiment of the present application. The display device shown in Figure 1 is a retroreflective suspended imaging system structure. The display device includes a display panel, a beam splitter 200, and a retroreflective component 300. The light-emitting surface of the display panel has a display image 110, and the display image 110 of the display panel partially emits light, and the emitted light passes through the beam splitter 200 and the retroreflective component 300 in sequence, and finally forms a suspended image in the air on the side of the beam splitter 200 away from the retroreflective component 300. The beam splitter 200 is located on the light-emitting side of the display panel, and is used to separate the light incident on the beam splitter 200 into reflected light and transmitted light, that is, part of the light incident on the beam splitter 200 is reflected to the retroreflective component 300, and the other part passes through the beam splitter 200. The light passing through the beam splitter 200 does not participate in imaging. The retroreflective component 300 is located on one side of the beam splitter 200 and is used to reflect the light incident on the retroreflective component 300 and return the light to its original path, that is, to achieve the effect that the reflected light of the retroreflective component 300 is parallel to the incident light and in opposite directions. As shown in Figure 2, it is a schematic diagram of the incident light and reflected light paths of the retroreflective component 300.

[0045] In the traditional floating display process, the light-emitting surface of the display panel displays the display image 110, and the outgoing light emitted from the light-emitting surface of the display panel is incident on the beam splitter 200; the beam splitter 200 receives the outgoing light of the display panel and reflects it to the retroreflective component 300, wherein the transmitted light passing through the beam splitter 200 does not participate in the imaging; the retroreflective component 300 receives the reflected light of the beam splitter 200 and returns the reflected light along the original path. The reflected light passes through the beam splitter 200 and converges in the air to form a real image (i.e., the floating image 120), and the floating image 120 is symmetrical with the display image 110 about the beam splitter 200.

[0046] Since the microstructure of the traditional retroreflective component 300 is usually a triangular pyramid or a hexahedron, the image quality is dependent on the angle of the light. The larger the angle of incidence of the light, the worse the image quality. As shown in Figure 3, Figure 3-1 shows the relationship between the outgoing light and the incident light at different incident angles. For the light at different incident angles on the retroreflective component, the offset of the outgoing light relative to the incident light varies, resulting in a lower image quality of the imaging spot, affecting the display quality and reducing the interactive experience. Figure 3-2 shows the relationship between the outgoing light and the incident light at the same incident angle. The offset of the outgoing light relative to the incident light is consistent, the image quality of the imaging spot is uniform, the display quality is better, and the interactive experience is better.

[0047] As shown in Figure 4 , for a display panel 100, the light emitted from its light-emitting surface 101 is typically divergent, with a certain divergence angle. However, in an actual retroreflective imaging system, light with a large divergence angle (i.e., non-imaging light or ineffective light) does not contribute to imaging and can interfere with the quality of the suspended image, reducing the interactive experience.

[0048] In order to solve the above problems, the present application proposes a display device that can improve the aerial imaging quality of the suspended display and enhance the user experience.

[0049] The display device provided in this application will be described in detail below with reference to specific embodiments and accompanying drawings.

[0050] As shown in FIG5 , the present application provides a display device, including:

[0051] The display panel 100 has a light emitting surface 101;

[0052] A beam splitter 200 is located on the light-emitting side of the display panel 100;

[0053] The retroreflective component 300 is located on a side of the beam splitter 200 close to the light emitting surface 101;

[0054] In which, a first collimating element 400 is provided between the display panel 100 and the beam splitter 200. The outgoing light of the display panel 100 is converted into parallel light by the first collimating element 400 and is incident on the beam splitter 200. The beam splitter 200 receives the light emitted by the first collimating element 400 and reflects it to the retroreflective component 300. The retroreflective component 300 receives the light reflected by the beam splitter 200 and reflects it to the beam splitter 200. The light reflected by the retroreflective component 300 passes through the beam splitter 200 and is gathered to form a real image.

[0055] Specifically, the display panel 100 serves as a light source and has a light emitting surface 101. The light emitting surface 101 emits light that constitutes a display image 110. The display panel 100 may be a liquid crystal display (LCD), a light emitting diode (LED), an organic light emitting diode (OLED), etc., but is not limited thereto.

[0056] The beam splitter 200 is used to separate the light incident on the beam splitter 200 into reflected light and transmitted light. That is, a portion of the light incident on the beam splitter 200 is reflected to the retroreflective assembly 300, and the other portion passes through the beam splitter 200. The light passing through the beam splitter 200 does not participate in imaging. The beam splitter 200 can be a semi-reflective and semi-transmissive beam splitter, but is not limited thereto.

[0057] The retroreflective assembly 300 is used to reflect incident light back along its original path, thereby achieving the effect that the reflected light from the retroreflective assembly 300 is parallel to the incident light and in the opposite direction. The retroreflective assembly 300 includes a plurality of retroreflective microstructures arranged in an array. The retroreflective microstructures may be triangular pyramidal, hexahedral, or microspherical structures, but are not limited thereto.

[0058] The first collimating element 400 is used to adjust divergent light into parallel light, thereby reducing the divergence angle of light emitted from the display panel and collimating the light. The first collimating element 400 can be any device with a collimating effect, such as a curved lens or a flat lens, or a combination of a curved lens and a flat lens, but is not limited thereto.

[0059] As shown in Figure 5, during the floating display process of the display device of the present application, the light-emitting surface 101 of the display panel 100 displays an image, and the outgoing light emitted from the light-emitting surface 101 of the display panel 100 is incident on the first collimating element 400; the first collimating element 400 converts the divergent outgoing light of the display panel 100 into parallel light and is incident on the beam splitter 200; the beam splitter 200 receives the light emitted by the first collimating element 400 and reflects it to the retroreflective component 300, wherein the transmitted light passing through the beam splitter 200 does not participate in imaging; the retroreflective component 300 receives the reflected light from the beam splitter 200 and returns the reflected light to its original path. The reflected light passes through the beam splitter 200 again and converges in the air to form a real image (i.e., a floating image), and the floating image and the displayed image are symmetrical about the beam splitter 200.

[0060] Since the basic imaging principle of the retroreflective component 300 conforms to the principle that the larger the effective incident aperture, the higher the imaging quality and the higher the light efficiency. As shown in FIG6 , it is a schematic diagram of the actual aperture and effective aperture of the retroreflective component 300, where r represents the effective aperture and R represents the actual aperture. As shown in FIG7 , it is a schematic diagram of the light path of the retroreflective component without the first collimating element and a schematic diagram of the light path of the retroreflective component with the first collimating element, wherein FIG7-1 is a schematic diagram of the light path of the retroreflective component without the first collimating element, and FIG7-2 is a schematic diagram of the light path of the retroreflective component with the first collimating element. By comparing FIG7-1 and FIG7-2, it can be seen that after the first collimating element 400 is set on the light-emitting side of the display panel 100, the effective aperture of the retroreflective component 300 is significantly increased, the light efficiency is increased, and the imaging quality can be effectively improved.

[0061] In the present application, a first collimating element 400 is arranged between the light-emitting side of the display panel 100 and the beam splitter 200, and the path of the outgoing light of the display panel 100 is adjusted by using the first collimating element 400, so as to narrow the angle of the outgoing light with a large divergence angle of the display panel 100, thereby increasing the proportion of effective light incident on the retroreflective component, improving the light efficiency, and further improving the aerial imaging quality of the display device, thereby improving the user experience.

[0062] In an optional embodiment of the present application, as shown in Figure 8, the display device also includes a second collimating element 500, which is located on the side of the beam splitter 200 away from the first collimating element 400, wherein the light reflected by the retroreflective component 300 passes through the beam splitter 200 and is incident on the second collimating element 500, and the light emitted by the second collimating element 500 is gathered to form a real image.

[0063] Specifically, as shown in Figure 8, during the floating display process of the display device of the present application, the light-emitting surface 101 of the display panel 100 displays an image, and the outgoing light emitted from the light-emitting surface 101 of the display panel 100 is incident on the first collimating element 400; the first collimating element 400 converts the divergent outgoing light of the display panel 100 into parallel light and is incident on the beam splitter 200; the beam splitter 200 receives the outgoing light of the first collimating element 400 and reflects it to the retroreflective component 300, wherein the transmitted light passing through the beam splitter 200 does not participate in imaging; the retroreflective component 300 receives the reflected light of the beam splitter 200 and returns the reflected light along the original path, and the reflected light passes through the beam splitter 200 again and is incident on the second collimating element 500, and the light emitted through the second collimating element 500 converges in the air to form a real image (i.e., a floating image), and the floating image and the displayed image are symmetrical about the beam splitter 200.

[0064] In this embodiment, the second collimating element 500 can converge the reflected light that ultimately passes through the beam splitter 200, ensuring that the image size remains unchanged, thereby maintaining the same size between the suspended image and the displayed image. This application utilizes two collimating elements placed on either side of the beam splitter 200 to collimate and converge light incident at different angles, ensuring that light from different angles has the same offset, thereby enhancing the lighting effect and further improving the quality of the suspended image.

[0065] In an optional embodiment of the present application, the light-emitting surface 101 of the display panel 100 includes a display area, which is used to display images. The projection of the first collimating element 400 on the display panel 100 covers the display area to ensure that all light emitted from the display area can be incident on the first collimating element 400. The second collimating element 500 and the first collimating element 400 are symmetrically arranged with respect to the beam splitter 200 to improve light efficiency utilization and improve the quality of the suspended image.

[0066] In an optional embodiment of the present application, as shown in FIG8 , the first collimating element 400 and the second collimating element 500 are both transparent spheres, such as transparent glass balls. Glass balls have the function of collimating and converging light. The first collimating element 400 utilizes the collimating effect of the glass balls to convert the divergent light emitted by the display panel 100 into parallel light, thereby reducing the divergence angle of the light emitted by the display panel 100. The second collimating element 500 utilizes the converging effect of the glass balls to converge the light passing through the beam splitter 200 to form a real image consistent with the displayed image, thereby improving the quality of the suspended image. The combination of the two sets of glass balls can significantly improve the imaging quality of the system while improving the lighting effect.

[0067] In some embodiments, the first collimating element 400 and the second collimating element 500 respectively include at least one glass ball, and the first collimating element 400 and the second collimating element 500 are symmetrically arranged with respect to the beam splitter 200 .

[0068] Specifically, as shown in Figure 8, a glass ball is set on each side of the beam splitter 200 of the display device, and the glass balls are symmetrically arranged with respect to the beam splitter 200. The orthographic projection of the glass ball serving as the first collimating element 400 on the display panel 100 covers the display area of ​​the display panel 100 to ensure that all the outgoing light of the display panel 100 can be incident on the first collimating element 400. The glass ball serving as the second collimating element 500 is the same size as the glass ball serving as the first collimating element 400 and is symmetrically arranged with respect to the beam splitter 200. The light is finally converged by the second collimating element 500 to form a suspended image 120, so that the final suspended image 120 can display the complete display image 110, which can effectively improve the light efficiency utilization rate and improve the quality of the suspended image.

[0069] It should be noted that the first collimating element 400 and the second collimating element 500 may also include multiple glass balls, which can be set according to actual conditions such as the size and shape of the display panel 100; the first collimating element 400 and the second collimating element 500 may also be in an asymmetric relationship, and the relative position of the first collimating element 400 and the second collimating element 500 may also be set according to the light output direction of the display panel 100, the placement position of the display panel 100, the beam splitter 200 and the retroreflective component 300, and the position of the image plane, and no specific restrictions are made here.

[0070] In an optional embodiment of the present application, the first collimating element 400 is arranged on the light-emitting surface 101 of the display panel 100. Since the light emitted from the light-emitting surface 101 of the display panel 100 is a divergent light, as shown in FIG9 , the light emitted with a large divergence angle on the light-emitting surface 101 does not participate in the imaging, resulting in a decrease in the effective light utilization rate, thereby reducing the quality of the suspended image. Therefore, the present application improves the light-emitting surface 101 of the display panel 100 from the perspective of the light source, and by directly arranging the first collimating element 400 on the light-emitting surface 101 of the display panel 100, the light emitted from the light-emitting surface 101 of the display panel 100 can be converted into parallel light for imaging to the maximum extent, thereby effectively improving the light efficiency utilization rate of the light emitted from the display panel 100, and further improving the quality of the suspended image.

[0071] In an optional embodiment of the present application, as shown in FIG10 , the first collimating element 400 includes a plurality of micro lenses 410 . The micro lenses 410 are arrayed on the light exit surface 101 of the display panel 100 . The micro lenses may be convex lenses.

[0072] Specifically, a nanoimprinting process can be used to produce a microlens array structure on the light-emitting surface 101 of the display panel 100. The projection of the microlens array on the display panel 100 covers the display area. The microlens array is used to collimate the outgoing light of the display panel 100, reduce the outgoing light with a large divergence angle, improve the utilization rate of effective light, and thus improve the quality of the suspended image.

[0073] In some embodiments, the display panel 100 includes a plurality of pixel units 130 , and the orthographic projection of one microlens 410 on the display panel 100 covers one pixel unit 130 .

[0074] Specifically, as shown in FIG10 , one pixel unit 130 includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The pixel unit 130 constitutes the smallest light-emitting unit of the display panel 100. By making the orthographic projection of one microlens 410 on the display panel 100 cover one pixel unit 130, that is, the positions of the microlens 410 and the pixel unit 130 correspond one-to-one, the light emitted by each pixel unit 130 can be collimated by the microlens 410, thereby further improving the light efficiency utilization rate of the output light of the display panel 100 and thereby improving the quality of the suspended image.

[0075] It should be noted that, in order to reduce the difficulty of the process, multiple pixel units 130 may correspond to one microlens 410 , that is, the orthographic projection of one microlens 410 on the display panel 100 covers multiple pixel units 130 , and no specific limitation is made here.

[0076] In an optional embodiment of the present application, the first collimating element 400 is an anti-peep structure 420 or an anti-peep film 430. To reduce costs, the light-emitting surface 101 of the display panel 100 can also be covered with an anti-peep structure 420 or an anti-peep film 430. The light emitted from the display panel 100 can be collimated by utilizing the filtering effect of the anti-peep structure 420 or the anti-peep film 430, thereby reducing the light emitted with a large divergence angle and improving the utilization rate of effective light. However, the anti-peep structure 420 or the anti-peep film 430 in this solution often results in a 20-30% attenuation of brightness, which is generally suitable for some special scenarios, such as heads-up displays, main driving displays, or high-privacy scenarios such as banks.

[0077] Specifically, as shown in Figure 11, the first collimating element 400 is an anti-peeping structure 420, and the anti-peeping structure 420 can be a structure similar to a shutter. The anti-peeping structure 420 is arranged perpendicular to the light-emitting surface 101 of the display panel 100, and there is a gap between the anti-peeping structures 420. The anti-peeping structure 420 enables the outgoing light of the display panel 100 to be emitted from the gap to form parallel light, so as to collimate the divergent outgoing light of the display panel 100.

[0078] As shown in FIG12 , the first collimating element 400 is a privacy film 430 . The light emitted from the display panel 100 forms parallel light after passing through the privacy film 430 . The privacy film 430 has a collimating effect on the divergent light emitted from the display panel 100 .

[0079] In an optional embodiment of the present application, the display panel 100 , the beam splitter 200 , and the retroreflective component 300 are arranged in a triangle.

[0080] In one embodiment, the display panel 100, the beam splitter 200, and the retroreflective assembly 300 are arranged in an isosceles right triangle. As shown in FIG8 , the display panel 100 and the retroreflective assembly 300 are arranged perpendicularly, respectively located on the right-angled sides of the isosceles right triangle, and the beam splitter 200 is located on the hypotenuse of the right-angled side of the isosceles right triangle. The display panel 100, the beam splitter 200, and the retroreflective assembly 300 form an isosceles right triangle as a whole. The outgoing light of the display panel 100 is incident on the beam splitter 200 through the first collimating element 400, and the light reflected by the beam splitter 200 is perpendicularly incident on the retroreflective assembly 300. At this time, the retroreflective assembly 300 obtains maximum light efficiency, which can effectively improve the effective light utilization rate of the display device, thereby improving the quality of the suspended image and enhancing the user experience.

[0081] It should be noted that the arrangement of the display panel 100, the beam splitter 200 and the retroreflective component 300 is not limited to the above-mentioned triangle. The arrangement positions of the display panel 100, the beam splitter 200 and the retroreflective component 300 can be adjusted according to actual needs. The light propagation path needs to be maintained from the display panel 100 to the beam splitter 200, then from the beam splitter 200 to the retroreflective structure, and finally through the retroreflective structure and through the beam splitter 200 to the aerial image plane.

[0082] In summary, the present application provides a display device. The display device provided by the present application sets a first collimating element between the light-emitting side of the display panel and the beam splitter, and uses the first collimating element to adjust the path of the light emitted by the display panel, so as to narrow the angle of the light emitted by the display panel with a large divergence angle, so as to increase the proportion of effective light incident on the retroreflective component, improve the light efficiency, and then improve the aerial imaging quality of the display device, so as to enhance the user experience.

[0083] In summary, although the present application is disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A display device, comprising: A display panel having a light emitting surface; A beam splitter, located at the light emitting side of the display panel and forming a first angle with the light emitting surface of the display panel; A retroreflective component, located on a side of the beam splitter close to the light emitting surface; Among them, a first collimating element is provided between the display panel and the beam splitter, and the outgoing light of the display panel is incident on the beam splitter after passing through the first collimating element, and the beam splitter receives the light emitted by the first collimating element and reflects it to the retroreflective component, and the retroreflective component receives the light reflected by the beam splitter and reflects it to the beam splitter, and the light reflected by the retroreflective component passes through the beam splitter to form a real image.

2. The display device according to claim 1, wherein: The display device also includes a second collimating element, which is located on a side of the beam splitter away from the first collimating element, wherein the light reflected by the retroreflective component passes through the beam splitter and is incident on the second collimating element, and the light emitted by the second collimating element is gathered to form a real image.

3. The display device according to claim 2, wherein: The first collimating element includes a curved lens or a flat lens, and the second collimating element includes a curved lens or a flat lens.

4. The display device according to claim 3, wherein: The light emitting surface of the display panel includes a display area, the projection of the first collimating element on the display panel covers the display area, and the second collimating element and the first collimating element are symmetrically arranged with respect to the beam splitter.

5. The display device according to claim 2, wherein: The first collimating element and the second collimating element are both transparent spheres.

6. The display device according to claim 5, wherein: The light emitting surface of the display panel includes a display area, the projection of the first collimating element on the display panel covers the display area, and the second collimating element and the first collimating element are symmetrically arranged with respect to the beam splitter.

7. The display device according to claim 1, wherein: The first collimating element is arranged on the light emitting surface of the display panel.

8. The display device according to claim 7, wherein: The first collimating element includes a plurality of micro lenses, and the plurality of micro lens arrays are arranged on the light emitting surface of the display panel, and the micro lenses include convex lenses.

9. The display device according to claim 8, wherein: The display panel includes a plurality of pixel units, and the orthographic projection of one microlens on the display panel covers one pixel unit.

10. The display device according to claim 7, wherein: The first collimating element is an anti-peeping structure or an anti-peeping film.

11. The display device according to claim 1, wherein: The display panel, the beam splitter and the retroreflective component are arranged in a triangle.

12. A display device, comprising: A display panel having a light emitting surface; A beam splitter, located at the light emitting side of the display panel and forming a first angle with the light emitting surface of the display panel; A retroreflective component, located on a side of the beam splitter close to the light emitting surface; Among them, a first collimating element is provided between the display panel and the beam splitter, and the outgoing light of the display panel is incident on the beam splitter after passing through the first collimating element, and the beam splitter receives the light emitted by the first collimating element and reflects it to the retroreflective component, and the retroreflective component receives the light reflected by the beam splitter and reflects it to the beam splitter, and the light reflected by the retroreflective component passes through the beam splitter to form a real image, and the beam splitter is a semi-reflective and semi-transparent beam splitter.

13. The display device according to claim 12, wherein: The display device also includes a second collimating element, which is located on a side of the beam splitter away from the first collimating element, wherein the light reflected by the retroreflective component passes through the beam splitter and is incident on the second collimating element, and the light emitted by the second collimating element is gathered to form a real image.

14. The display device according to claim 13, wherein: The first collimating element includes a curved lens or a flat lens, and the second collimating element includes a curved lens or a flat lens.

15. The display device according to claim 14, wherein: The light emitting surface of the display panel includes a display area, the projection of the first collimating element on the display panel covers the display area, and the second collimating element and the first collimating element are symmetrically arranged with respect to the beam splitter.

16. The display device according to claim 13, wherein: The first collimating element and the second collimating element are both transparent spheres.

17. The display device according to claim 16, wherein: The light emitting surface of the display panel includes a display area, the projection of the first collimating element on the display panel covers the display area, and the second collimating element and the first collimating element are symmetrically arranged with respect to the beam splitter.

18. The display device according to claim 12, wherein: The first collimating element is arranged on the light emitting surface of the display panel.

19. The display device according to claim 18, wherein: The first collimating element includes a plurality of micro lenses, and the plurality of micro lens arrays are arranged on the light emitting surface of the display panel, and the micro lenses include convex lenses.

20. The display device according to claim 19, wherein: The display panel includes a plurality of pixel units, and the orthographic projection of one microlens on the display panel covers one pixel unit.

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