Display module and air-floating display device

Abstract

The present application provides a display module and an air-floating display device. A negative refractive index plate of the display module is arranged on a light-exit side of a display panel; the negative refractive index plate is configured to reflect first emergent light of the display panel, and guide the first emergent light out from the light-exit side of the negative refractive index plate as second emergent light; a light control member is arranged on the light-exit side of the negative refractive index plate, and the light control member is configured to intercept at least part of the second emergent light that has undergone an odd number of reflections within the negative refractive index plate.

Description

Display modules and floating display devices Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module and an air-floating display device. Background Technology

[0002] With the development of display technology, aerial levitation display technology has emerged. Aerial levitation displays project the image from a display panel into the air, achieving a medium-free, floating display. This technology can be applied to industries such as automotive, advertising, and educational equipment. Aerial levitation displays require a core reflective element that projects the display image into the air. Different aerial levitation display solutions have different advantages and disadvantages, such as image blurring, reduced brightness, reduced contrast, and image crosstalk. For example, aerial levitation display solutions using negative refractive index flat panels as reflective elements suffer from image crosstalk issues. Invention Overview

[0003] This application provides a display module and an aerial levitation display device to alleviate the technical problem of image crosstalk in aerial levitation display schemes that use negative refractive index flat plates as reflective elements.

[0004] The technical solution provided in this application is as follows:

[0005] In a first aspect, embodiments of this application provide a display module, which includes:

[0006] Display panel;

[0007] A negative refractive index plate is disposed on the light-emitting side of the display panel. The negative refractive index plate is configured to reflect the first emitted light from the display panel and to guide the first emitted light from the light-emitting side of the negative refractive index plate as a second emitted light.

[0008] A light control component is disposed on the light-emitting side of the negative refractive index plate, and the light control component is configured to intercept at least a portion of the second emitted light that has been reflected an odd number of times by the negative refractive index plate.

[0009] Secondly, embodiments of this application provide an aerial levitation display device, which includes the display module described in the foregoing embodiments. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 shows a schematic diagram of the principle of using a negative refractive index flat plate for aerial levitation display.

[0012] Figure 2 shows a detailed schematic diagram of the negative refractive index plate in Figure 1.

[0013] Figure 3 shows a schematic diagram of the light reflection path in a local part of the negative refractive index plate in Figure 2.

[0014] Figure 4 shows a schematic diagram of a real image suspended in the air.

[0015] Figure 5 shows a schematic diagram of a display module according to an embodiment of this application.

[0016] Figure 6 shows a schematic diagram of the aerial levitation image formed by the module shown in Figure 5.

[0017] Figure 7 shows a partial schematic diagram of a display module according to an embodiment of this application.

[0018] Figure 8 shows another partial schematic diagram of the display module according to an embodiment of this application.

[0019] Figure 9 shows another partial schematic diagram of the display module according to an embodiment of this application.

[0020] Figure 10 shows another partial schematic diagram of the display module according to an embodiment of this application.

[0021] Figure 11 shows a further partial schematic diagram of the display module according to an embodiment of this application. Embodiments of the present invention

[0022] The following descriptions of the embodiments are based on the accompanying illustrations, illustrating specific embodiments in which this application can be implemented. Directional terms used in this application, such as [up], [down], [front], [back], [left], [right], [inner], [outer], [side], etc., are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustration and understanding of this application, and not for limiting this application. In the figures, structurally similar units are denoted by the same reference numerals. In the figures, the thickness of some layers and regions is exaggerated for clarity and ease of description. That is, the dimensions and thicknesses of each component shown in the figures are arbitrarily shown, but this application is not limited thereto.

[0023] To address the image crosstalk problem in aerial levitation display schemes using negative refractive index plates as reflective elements, the inventors of this application discovered in their research that: Referring to Figures 1 to 4, Figure 1 shows a schematic diagram of the principle of aerial levitation display using a negative refractive index plate, Figure 2 shows a detailed schematic diagram of the negative refractive index plate in Figure 1, Figure 3 shows a schematic diagram of the light reflection path of a portion of the negative refractive index plate in Figure 2, and Figure 4 shows a schematic diagram of an aerial levitation real image. Referring to Figure 1, the negative refractive index plate 20 is disposed on the light-emitting side of the display panel 10. The first emitted light from the display panel 10 passes through the negative refractive index plate 20 and forms a levitation real image 200 opposite to the display panel 10 on the light-emitting side of the negative refractive index plate 20. The levitation real image 200 and the display panel 10 are symmetrical about the negative refractive index plate 20. The negative refractive index plate 20 is a type of plate lens. The negative refractive index plate 20 includes an upper lens and a lower lens that are closely bonded and superimposed. Both the upper and lower lenses employ multiple reflective strips that are perpendicular to the lens surface and arranged in parallel. Each reflective strip includes a substrate and reflective films disposed on both sides of the substrate. The reflective strips of the upper lens and the reflective strips of the lower lens are arranged orthogonally.

[0024] Specifically, referring to Figure 2, the negative refractive index plate 20 includes a first reflective layer 21 and a second reflective layer 22. The first reflective layer 21 includes a plurality of first reflective strips 211 arranged along a first direction X. Each first reflective strip 211 includes two opposing first reflective surfaces 2111, and the first direction X is perpendicular to the first reflective surfaces 2111. The second reflective layer 22 is located on the side of the first reflective layer 21 away from the display panel 10. The second reflective layer 22 includes a plurality of second reflective strips 221 arranged along a second direction Y. Each second reflective strip 221 includes two opposing second reflective surfaces 2211, which intersect perpendicularly with the first reflective surfaces 2111. The second direction Y is perpendicular to the second reflective surfaces 2211 and perpendicular to the first direction X. Both the first reflective strips 211 and the second reflective strips 221 include a substrate and a reflective film disposed on two opposing sides of the substrate. The substrate includes a transparent substrate such as glass or resin film. The reflective film disposed on the substrate is either the first reflective surface 2111 or the second reflective surface 2211. The negative refractive index plate 20 uses the principle of light field reconstruction to refocus the first outgoing light emitted by the display panel 10 located on one side of the negative refractive index plate 20 into a real image in the air on the other side of the negative refractive index plate 20, thereby achieving a floating display in the air.

[0025] Referring to Figure 3, the first emitted light emitted by the display panel 10 forms a suspended real image in the air after being reflected twice by the negative refractive index plate 20. For example, taking the first ray A in the first emitted light emitted by the display panel 10 as an example, the first ray A is first reflected by the first reflective surface 2111 of the first reflective strip 211, and then reflected by the second reflective surface 2211 of the second reflective strip 221. After being reflected by the second reflective strip 221, it exits from the light-emitting side of the negative refractive index plate 20 as a second emitted light, which forms a suspended real image in the air. However, when the first emitted light emitted by the display panel 10 passes through the negative refractive index plate 20, in addition to secondary reflection, it may also undergo zero reflection, primary reflection, tertiary reflection, quaternary reflection, etc.

[0026] It should be noted that zero reflection means that the first emitted light emitted by the display panel 10 exits directly from the negative refractive index plate 20 without being reflected by the negative refractive index plate 20; first reflection means that the first emitted light emitted by the display panel 10 is reflected once by the first reflective layer 21 or the second reflective layer 22 of the negative refractive index plate 20; second reflection means that the first emitted light emitted by the display panel 10 is reflected once by each of the first reflective layer 21 and the second reflective layer 22 of the negative refractive index plate 20; third reflection means that the first emitted light emitted by the display panel 10 is reflected a total of three times by the first reflective layer 21 and the second reflective layer 22 of the negative refractive index plate 20; and fourth reflection means that the first emitted light emitted by the display panel 10 is reflected twice by each of the first reflective layer 21 and the second reflective layer 22 of the negative refractive index plate 20. Among these, the second-reflected light is the effective light for forming a real image suspended in the air, while zero-reflection light, first-reflection light, third-reflection light, and fourth-reflection light are crosstalk light that forms a real image suspended in the air.

[0027] Referring to Figure 4, the secondary reflected light, which serves as the effective light for forming a suspended real image in the air, can reproduce the image on the display panel 10, thereby forming a real image RP in the air corresponding to the image on the display panel 10. However, crosstalk light formed by zero-order reflection light, first-order reflection light, third-order reflection light, fourth-order reflection light, etc., will form interfering images IP in the air. The interfering images IP are located around the real image RP, resulting in severe crosstalk at large angles. Moreover, the presence of interfering images IP increases the brightness of the display background and reduces the image contrast, and also affects the display effect, causing ghosting problems and dizziness.

[0028] To address this issue, the inventors of this application, through continuous exploration and research, have proposed a display module and an aerial floating display device to improve the problem of image crosstalk.

[0029] In one embodiment, this application provides a display module comprising:

[0030] Display panel;

[0031] A negative refractive index plate is disposed on the light-emitting side of the display panel. The negative refractive index plate is configured to reflect the first emitted light from the display panel and to guide the first emitted light from the light-emitting side of the negative refractive index plate as a second emitted light.

[0032] A light control component is disposed on the light-emitting side of the negative refractive index plate, and the light control component is configured to intercept at least a portion of the second emitted light that has been reflected an odd number of times by the negative refractive index plate.

[0033] In one embodiment, the negative refractive index plate includes:

[0034] The first reflective layer includes a plurality of first reflective strips arranged along a first direction, each of the first reflective strips including two opposing first reflective surfaces, the first direction being perpendicular to the first reflective surfaces;

[0035] The second reflective layer is located on the side of the first reflective layer away from the display panel. The second reflective layer includes a plurality of second reflective strips arranged along a second direction. Each second reflective strip includes two opposing second reflective surfaces. The second reflective surfaces intersect the first reflective surfaces perpendicularly. The second direction is perpendicular to the second reflective surfaces and perpendicular to the first direction.

[0036] The light-controlling component is disposed on the side of the second reflective layer away from the first reflective layer.

[0037] In one embodiment, the first emitted light from the display panel includes circularly polarized light, and the light control component includes a circular polarizer whose rotation direction is the same as that of the circularly polarized light.

[0038] In one embodiment, the circularly polarized light is left-handed circularly polarized light, and the circular polarizer is a left-handed circular polarizer.

[0039] In one embodiment, the circularly polarized light is right-handed circularly polarized light, and the circular polarizer is a right-handed circular polarizer.

[0040] In one embodiment, the circular polarizer includes a quarter-wave plate and a linear polarizer stacked together.

[0041] In one embodiment, the first emitted light from the display panel includes linearly polarized light, and the light control component includes a linear polarizer;

[0042] The display module further includes a dimming component, which is disposed between adjacent first reflective strips and / or adjacent second reflective strips. The dimming component is configured to cooperate with the negative refractive index plate to change the polarization direction of the linearly polarized light.

[0043] In one embodiment, the dimming component includes a quarter-wave plate.

[0044] In one embodiment, the polarization direction of the linear polarizer is perpendicular to the polarization direction of the linearly polarized light; the dimming component is disposed between adjacent first reflective strips or between adjacent second reflective strips.

[0045] In one embodiment, the linear polarizer is a horizontal polarizer, and the linearly polarized light is vertically polarized light; the dimming component is disposed between adjacent second reflective strips.

[0046] In one embodiment, the linear polarizer is a vertical polarizer, and the linearly polarized light is horizontally polarized light; the dimming component is disposed between adjacent second reflective strips.

[0047] In one embodiment, the linear polarizer is a horizontal polarizer, and the linearly polarized light is vertically polarized light; the dimming component is disposed between adjacent first reflective strips.

[0048] In one embodiment, the linear polarizer is a vertical polarizer, and the linearly polarized light is horizontally polarized light; the dimming component is disposed between adjacent first reflective strips.

[0049] In one embodiment, the polarization direction of the linear polarizer is the same as the polarization direction of the linearly polarized light; the dimming component is disposed between adjacent first reflective strips and between adjacent second reflective strips.

[0050] In one embodiment, the linear polarizer is a vertical polarizer, and the linearly polarized light is vertically polarized light.

[0051] In one embodiment, the linear polarizer is a horizontal polarizer, and the linearly polarized light is horizontally polarized light.

[0052] In one embodiment, the negative refractive index plate is tilted relative to the display panel, and the tilt angle between the negative refractive index plate and the display panel ranges from 10 degrees to 50 degrees.

[0053] In one embodiment, the display panel includes a light-emitting diode display panel, a liquid crystal display panel, a silicon-based liquid crystal display panel, an organic light-emitting diode display panel, a micro light-emitting diode display panel, a sub-millimeter light-emitting diode display panel, a projector, a laser, and a laser diode.

[0054] In one embodiment, this application also provides an airborne levitating display device, which includes the display module described in one of the foregoing embodiments.

[0055] The display module and floating display device provided in this application include a display panel, a negative refractive index plate, and a light control component. The negative refractive index plate is disposed on the light-emitting side of the display panel. The negative refractive index plate is configured to reflect the first emitted light from the display panel and guide the first emitted light from the light-emitting side of the negative refractive index plate as a second emitted light. The light control component is disposed on the light-emitting side of the negative refractive index plate. The light control component is configured to intercept at least a portion of the second emitted light that has been reflected an odd number of times by the negative refractive index plate, so as to reduce crosstalk light that affects the aerial imaging effect and improve the image crosstalk problem in the aerial floating display scheme that uses a negative refractive index plate as a reflective element.

[0056] Specifically, please refer to Figures 1 to 6. Figure 5 shows a schematic diagram of a display module according to an embodiment of this application, and Figure 6 shows a schematic diagram of a suspended real image formed by the display module in Figure 5. Referring to Figure 5, the display module 100 includes a display panel 10, a negative refractive index plate 20, and a light control component 30. The negative refractive index plate 20 is disposed on the light-emitting side of the display panel 10. The negative refractive index plate 20 is configured to reflect the first emitted light from the display panel 10 and guide the first emitted light from the light-emitting side of the negative refractive index plate 20 as a second emitted light. The light control component 30 is disposed on the light-emitting side of the negative refractive index plate 20. The light control component 30 is configured to intercept at least a portion of the second emitted light that has been reflected an odd number of times by the negative refractive index plate 20, so as to reduce crosstalk light affecting the aerial imaging effect and improve the image crosstalk problem in the aerial levitation display scheme using the negative refractive index plate 20 as a reflective element.

[0057] Specifically, the negative refractive index plate 20 includes a first reflective layer 21 and a second reflective layer 22. The first reflective layer 21 includes a plurality of first reflective strips 211 arranged along a first direction X, each first reflective strip 211 including two opposing first reflective surfaces 2111, the first direction X being perpendicular to the first reflective surfaces 2111. The second reflective layer 22 is located on the side of the first reflective layer 21 away from the display panel 10. The second reflective layer 22 includes a plurality of second reflective strips 221 arranged along a second direction Y, each second reflective strip 221 including two opposing second reflective surfaces 2211, the second reflective surfaces 2211 intersecting perpendicularly with the first reflective surfaces 2111, the second direction Y being perpendicular to the second reflective surfaces 2211, and the second direction Y being perpendicular to the first direction X. The light-controlling component 30 is disposed on the side of the second reflective layer 22 away from the first reflective layer 21.

[0058] Optionally, the display panel 10 may include a light-emitting diode (LED) display panel, a liquid crystal display (LCD) panel, a liquid crystal on silicon (LCOS) display panel, an organic light-emitting diode (OLED) display panel, a micro light-emitting diode (Micro-LED) display panel, a mini light-emitting diode (Mini-LED) display panel, a projection, a laser, a laser diode, or any other suitable display panel, without limitation.

[0059] In one embodiment, if the first emitted light from the display panel 10 includes circularly polarized light, then the light control component 30 includes a circular polarizer 30-1, the polarizer 30-1 having the same rotation direction as the circularly polarized light. The circular polarizer 30-1 includes a quarter-wave plate (QWP) and a linear polarizer stacked together. The circular polarizer 30-1 can transmit circularly polarized light with the same rotation direction as the polarizer, while blocking circularly polarized light with the opposite rotation direction.

[0060] Optionally, referring to Figure 5, the circularly polarized light is left-handed circularly polarized light B, and the circular polarizer 30-1 is a left-handed circularly polarizer 30-1L. The left-handed circularly polarizer 30-1L can transmit the left-handed circularly polarized light B while blocking circularly polarized light of other directions. When the left-handed circularly polarized light B emitted by the display panel 10 passes through the negative refractive index plate 20, it undergoes zero-fold reflection, first-fold reflection, second-fold reflection, third-fold reflection, and so on. After an odd number of reflections, the left-handed circularly polarized light B changes its direction of rotation, becoming right-handed circularly polarized light, while after an even number of reflections, it does not change its direction of rotation and remains left-handed circularly polarized light. For example, after the left-handed circularly polarized light B undergoes first and third reflections from the negative refractive index plate 20, it becomes right-handed circularly polarized light, while after the left-handed circularly polarized light B undergoes second reflection from the negative refractive index plate 20, it remains left-handed circularly polarized light. Thus, the left-hand circularly polarized light B emitted by the display panel 10, after undergoing one, three, or other odd-numbered reflections by the negative refractive index plate 20, becomes right-hand circularly polarized light. This right-hand circularly polarized light cannot pass through the left-hand circularly polarized plate 30-1L, allowing the left-hand circularly polarized plate 30-1L to intercept the second outgoing light from the left-hand circularly polarized light B emitted by the display panel 10 after the odd-numbered reflections by the negative refractive index plate 20. This reduces crosstalk and improves image contrast, thereby mitigating the image crosstalk problem inherent in aerial levitation display schemes using the negative refractive index plate 20 as a reflective element.

[0061] In some other embodiments, the circularly polarized light is right-handed circularly polarized light, and the circular polarizer 30-1 is a right-handed circular polarizer. The right-handed circular polarizer can transmit the right-handed circularly polarized light while blocking circularly polarized light of other directions. When the right-handed circularly polarized light emitted by the display panel 10 passes through the negative refractive index plate 20, it undergoes zero reflection, first reflection, second reflection, third reflection, and so on. Specifically, the right-handed circularly polarized light changes its direction of rotation after an odd number of reflections, becoming left-handed circularly polarized light, while it remains right-handed circularly polarized light after an even number of reflections. For example, after the right-handed circularly polarized light undergoes first and third reflections from the negative refractive index plate 20, it becomes left-handed circularly polarized light, while after a second reflection from the negative refractive index plate 20, it remains right-handed circularly polarized light. Thus, in the right-hand circularly polarized light emitted by the display panel 10, the right-hand circularly polarized light that has undergone one, three, or other odd-numbered reflections by the negative refractive index plate 20 will become left-hand circularly polarized light. The left-hand circularly polarized light cannot pass through the right-hand circularly polarized plate, so that the right-hand circularly polarized plate can intercept the second outgoing light that has undergone an odd number of reflections by the negative refractive index plate 20 in the right-hand circularly polarized light emitted by the display panel 10, thereby reducing crosstalk light and improving image contrast. This improves the image crosstalk problem in the aerial levitation display scheme that uses the negative refractive index plate 20 as a reflective element.

[0062] Referring to Figure 6, and comparing it with Figure 4, it can be seen that by setting the light control component 30 on the light-emitting side of the negative refractive index plate 20, the light control component 30 can intercept the second emitted light that has been reflected an odd number of times by the negative refractive index plate 20, thereby reducing the crosstalk image formed by the second emitted light that has been reflected an odd number of times, making the dark areas of the suspended image formed by the display module 100 darker and improving the image contrast; moreover, the reduction of the crosstalk image can also improve the problem of ghosting that causes dizziness and improve the display effect.

[0063] In one embodiment, continuing to refer to FIG5, the negative refractive index plate 20 is inclined relative to the display panel 10, and the tilt angle between the negative refractive index plate 20 and the display panel 10 ranges from 10 degrees to 50 degrees, so as to reduce the second outgoing light of the first outgoing light of the display panel 10 that undergoes zero reflection after passing through the negative refractive index plate 20, thereby further improving the image crosstalk problem.

[0064] In one embodiment, referring to Figures 1 to 11, Figure 7 shows a partial schematic diagram of a display module according to an embodiment of this application, Figure 8 shows another partial schematic diagram of a display module according to an embodiment of this application, Figure 9 shows yet another partial schematic diagram of a display module according to an embodiment of this application, Figure 10 shows yet another partial schematic diagram of a display module according to an embodiment of this application, and Figure 11 shows yet another partial schematic diagram of a display module according to an embodiment of this application. Referring to Figures 7 to 11, unlike the embodiment shown in Figure 5, the first emitted light of the display panel 10 includes linearly polarized light, and the light control component 30 includes a linear polarizer 30-2. The linear polarizer 30-2 can transmit linearly polarized light with the same polarization direction as the light and intercept linearly polarized light with a different polarization direction. The display module 100 also includes a dimming component 40, which is disposed between adjacent first reflective strips 211 and / or adjacent second reflective strips 221. The dimming component 40 is configured to cooperate with the negative refractive index plate 20 to change the polarization direction of the linearly polarized light. Optionally, the dimming component 40 includes a quarter-wave plate. The parts that are the same as those in the above embodiments will not be repeated here. The differences from the above embodiments will be described in detail below.

[0065] In one embodiment, referring to FIG7, the polarization direction of the linear polarizer 30-2 is perpendicular to the polarization direction of the linearly polarized light. The dimming component 40 is disposed between adjacent first reflective strips 211, for example, the dimming component 40 may be disposed on the first reflective surface 2111 of the first reflective strip 211. Optionally, at least one first reflective strip 211 is disposed between two adjacent dimming components 40, so that the dimming components 40 are uniformly distributed on the first reflective layer 21, thereby achieving better dimming. Optionally, the linearly polarized light is horizontally polarized light P, and the linear polarizer 30-2 is a vertical polarizer 30-2S. When the horizontally polarized light P emitted by the display panel 10 passes through the negative refractive index plate 20, it undergoes zero-fold reflection, first-fold reflection, second-fold reflection, third-fold reflection, fourth-fold reflection, and so on.

[0066] The second outgoing light after the zero-first reflection of the horizontally polarized light P through the negative refractive index plate 20 is still horizontally polarized light P. When the horizontally polarized light P passes through the vertical polarizer 30-2S, it will be intercepted by the vertical polarizer 30-2S. That is, the vertical polarizer 30-2S can intercept the second outgoing light of the horizontally polarized light P after the zero-first reflection of the negative refractive index plate 20, thereby reducing the crosstalk image formed by the zero-first reflection light.

[0067] The second emitted light after the horizontally polarized light P undergoes a single reflection by the negative refractive index plate 20 can be divided into two cases. First, the reflection occurs at the first reflecting surface 2111. In this case, since a dimming component 40 is provided on the first reflecting surface 2111, the horizontally polarized light P passes through the dimming component 40 and is reflected by the first reflecting surface 2111 before passing through the dimming component 40 again. At this time, the polarization direction of the horizontally polarized light P changes, becoming vertically polarized light S, which can pass through the vertical polarizer 30-2S. Second, the reflection occurs at the second reflecting surface 2211. In this case, since the dimming component 40 is not provided on the second reflecting surface 2211, the horizontally polarized light P directly passes through the reflection of the second reflecting surface 2211 and remains horizontally polarized light P. The vertical polarizer 30-2S can intercept the horizontally polarized light P. Thus, by setting the dimming member 40 between adjacent first reflective strips 211 and cooperating with the light control member 30, half of the primary reflected light can be intercepted, thereby reducing the crosstalk image formed by the primary reflected light.

[0068] For the second emitted light after secondary reflection of the horizontally polarized light P by the negative refractive index plate 20, taking the example of the horizontally polarized light P being reflected first by the first reflective surface 2111 and then by the second reflective sheet, the horizontally polarized light P is incident on the first reflective surface 2111 after passing through the dimming member 40. After being reflected by the first reflective surface 2111, it passes through the dimming member 40 again. At this time, the polarization direction of the horizontally polarized light P changes, becoming vertically polarized light S. The vertically polarized light S is then reflected by the second reflective sheet, and after being reflected by the second reflective sheet, it is still vertically polarized light S, which can pass through the vertical polarizer 30-2S. Similarly, when the horizontally polarized light P is first reflected by the second reflective surface 2211 and then by the first reflective sheet, the second emitted light after secondary reflection can also pass through the vertical polarizer 30-2S. Thus, by setting the dimming member 40 between adjacent first reflective strips 211 and cooperating with the light control member 30, the secondary reflected light is not intercepted.

[0069] The second emitted light after three reflections of the horizontally polarized light P by the negative refractive index plate 20 can be divided into two cases. First, the horizontally polarized light P undergoes two reflections on the first reflecting surface 2111 and one reflection on the second reflecting surface 2211. Specifically, since the dimming component 40 is provided on the first reflecting surface 2111, after the first reflection by the first reflecting surface 2111, the horizontally polarized light P becomes vertically polarized light S. The vertically polarized light S remains vertically polarized light S after being reflected by the second reflecting surface 2211. The vertically polarized light S then undergoes a second reflection by the first reflecting surface 2111. Subsequently, the vertically polarized light S becomes horizontally polarized light P, which is then intercepted by the vertical polarizer 30-2S. Secondly, the horizontally polarized light P undergoes one reflection on the first reflecting surface 2111 and two reflections on the second reflecting surface 2211. Specifically, after the first reflection by the second reflecting surface 2211, the horizontally polarized light P remains horizontally polarized P. After being reflected again by the first reflecting surface 2111, the horizontally polarized light P becomes vertically polarized light S. After being reflected again by the second reflecting surface 2211, the vertically polarized light S remains vertically polarized S and can pass through the vertical polarizer 30-2S. Thus, by placing the dimming component 40 between adjacent first reflecting strips 211 and cooperating with the light control component 30, half of the triple-reflected light can be intercepted, thereby reducing crosstalk images formed by the triple-reflected light.

[0070] For the second emitted light after four reflections of the horizontally polarized light P by the negative refractive index plate 20, taking the example of the horizontally polarized light P being reflected first at the first reflecting surface 2111 and then at the second reflecting surface 2211, since the dimming component 40 is provided on the first reflecting surface 2111, after the horizontally polarized light P is reflected for the first time by the first reflecting surface 2111, the horizontally polarized light P becomes vertically polarized light S. After the vertically polarized light S is reflected for the first time by the second reflecting surface 2211, it is still vertically polarized light S. After the vertically polarized light S is reflected for the second time by the first reflecting surface 2111, it becomes horizontally polarized light P. After the horizontally polarized light P is reflected for the second time by the second reflecting surface 2211, it is still horizontally polarized light P. The horizontally polarized light P is then intercepted by the vertical polarizer 30-2S. Thus, by setting the dimming component 40 between adjacent first reflecting strips 211 and cooperating with the light control component 30, the four-fold reflected light can be intercepted, thereby reducing the crosstalk image formed by the four-fold reflected light.

[0071] In summary, by setting the dimming component 40 between adjacent first reflective strips 211 and cooperating with the light control component 30, it is possible to intercept zero-order reflection light, fourth-order reflection light, half of the first-order reflection light, and half of the third-order reflection light. That is, it is possible to intercept zero-order reflection light, a portion of odd-order reflection light, and a portion of even-order reflection light, thereby reducing crosstalk images formed by zero-order reflection light, odd-order reflection light, and a portion of even-order reflection light. Moreover, from the second emitted light that can pass through the vertical polarizer 30-2S, it can be seen that the number of times this portion of the second emitted light passes through the dimming component 40 satisfies: 2*(2n+1) times, where n=0, 1, 2, 3, etc., non-negative integers.

[0072] In one embodiment, referring to FIG8, unlike the embodiment shown in FIG7, the linearly polarized light is vertically polarized light S, and the linear polarizer 30-2 is a horizontal polarizer 30-2P. In this case, it is also possible to intercept zero-order reflection light as well as some odd-order reflection light and some even-order reflection light, thereby reducing the crosstalk image formed by zero-order reflection light, odd-order reflection light and some even-order reflection light. Other descriptions are as described in the above embodiments and will not be repeated here.

[0073] In one embodiment, referring to FIG9, unlike the embodiment shown in FIG7, the dimming component 40 is disposed between adjacent second reflective strips 221. For example, the dimming component 40 may be disposed on the second reflective surface 2211 of the second reflective strip 221. Optionally, at least one second reflective strip 221 is disposed between two adjacent dimming components 40, so that the dimming components 40 are evenly distributed on the second reflective layer 22, achieving better dimming. In this embodiment, zero-order reflection light, as well as some odd-order reflection light and some even-order reflection light, can also be intercepted, thereby reducing crosstalk images formed by zero-order reflection light, odd-order reflection light, and some even-order reflection light. Other descriptions are as described in the above embodiments and will not be repeated here.

[0074] In one embodiment, referring to FIG10, unlike the embodiment shown in FIG9, the linearly polarized light is vertically polarized light S, and the linear polarizer 30-2 is a horizontal polarizer 30-2P. In this case, it is also possible to intercept zero-order reflection light and part of odd-order reflection light and part of even-order reflection light, thereby reducing crosstalk images formed by zero-order reflection light, odd-order reflection light, and part of even-order reflection light. Other descriptions are as described in the above embodiments and will not be repeated here.

[0075] In one embodiment, referring to FIG11, unlike the embodiment shown in FIG10, the polarization direction of the linear polarizer 30-2 is the same as the polarization direction of the linearly polarized light. The dimming component 40 is disposed between adjacent first reflective strips 211 and adjacent second reflective strips 221. For example, the dimming component 40 can be disposed on the first reflective surface 2111 of the first reflective strip 211 and the second reflective surface 2211 of the second reflective strip 221. Optionally, at least one first reflective strip 211 is disposed between two adjacent dimming components 40 located on the first reflective layer 21, so that the dimming components 40 are uniformly distributed on the first reflective layer 21. At least one second reflective strip 221 is disposed between two adjacent dimming components 40 located on the second reflective layer 22, so that the dimming components 40 are uniformly distributed on the second reflective layer 22, thereby achieving better dimming.

[0076] Optionally, referring to Figure 11, the linearly polarized light is vertically polarized light S, and the linear polarizer 30-2 is a vertical polarizer 30-2S. When the vertically polarized light S emitted by the display panel 10 passes through the negative refractive index plate 20, it will undergo zero reflection, first reflection, second reflection, third reflection, fourth reflection, and so on.

[0077] The second emitted light after the vertically polarized light S undergoes one reflection from the negative refractive index plate 20 can be divided into two cases. First, the reflection occurs at the first reflecting surface 2111. In this case, because a dimming component 40 is provided on the first reflecting surface 2111, the vertically polarized light S passes through the dimming component 40 and is reflected by the first reflecting surface 2111 before passing through the dimming component 40 again. At this time, the polarization direction of the vertically polarized light S changes, becoming horizontally polarized light P, which is then intercepted by the vertical polarizer 30-2S. Second, the reflection occurs at the second reflecting surface 2211. In this case, because the dimming component 40 is provided on the second reflecting surface 2211, the vertically polarized light S directly passes through the second reflecting surface 2211, and its polarization direction changes, becoming horizontally polarized light P, which is then intercepted by the vertical polarizer 30-2S. Thus, by setting the dimming component 40 between adjacent first reflective strips 211 and adjacent second reflective strips 221, and cooperating with the light control component 30, all primary reflected light can be intercepted, thereby reducing crosstalk images formed by primary reflected light.

[0078] For the second emitted light after secondary reflection of the vertically polarized light S by the negative refractive index plate 20, taking the example of the vertically polarized light S being first reflected by the first reflective surface 2111 and then by the second reflective sheet, the vertically polarized light S is incident on the first reflective surface 2111 after passing through the dimming member 40. After being reflected by the first reflective surface 2111, it passes through the dimming member 40 again. At this time, the polarization direction of the vertically polarized light S changes, becoming horizontally polarized light P. After being reflected by the second reflective sheet, the horizontally polarized light P becomes vertically polarized light S, which can pass through the vertical polarizer 30-2S. Similarly, when the vertically polarized light S is first reflected by the second reflective surface 2211 and then by the first reflective sheet, the second emitted light after secondary reflection can also pass through the vertical polarizer 30-2S. Thus, by setting the dimming member 40 between adjacent first reflective strips 211 and adjacent second reflective strips 221, and cooperating with the light control member 30, the secondary reflected light is not intercepted.

[0079] The second emitted light after three reflections of the vertically polarized light S by the negative refractive index plate 20 can be divided into two cases. First, the vertically polarized light S undergoes two reflections on the first reflecting surface 2111 and one reflection on the second reflecting surface 2211. Specifically, since the dimming component 40 is provided on the first reflecting surface 2111, after the first reflection by the first reflecting surface 2111, the vertically polarized light S becomes horizontally polarized light P. After the horizontally polarized light P is reflected by the second reflecting surface 2211, it becomes vertically polarized light S. After the vertically polarized light S is reflected a second time by the first reflecting surface 2111, it becomes vertically polarized light S again. The polarized light S becomes horizontally polarized light P, which is then intercepted by the vertical polarizer 30-2S. Alternatively, the vertically polarized light S undergoes one reflection on the first reflecting surface 2111 and two reflections on the second reflecting surface 2211. Specifically, after the first reflection by the second reflecting surface 2211, the vertically polarized light S becomes horizontally polarized light P. After being reflected again by the first reflecting surface 2111, the horizontally polarized light P becomes vertically polarized light S. After being reflected a second time by the second reflecting surface 2211, the vertically polarized light S becomes horizontally polarized light P again, which is then intercepted by the vertical polarizer 30-2S. Thus, by placing the dimming component 40 between adjacent first reflecting strips 211 and adjacent second reflecting strips 221, and cooperating with the light control component 30, all three reflections can be intercepted, thereby reducing crosstalk images formed by the three reflections.

[0080] In summary, by arranging the dimming component 40 between adjacent first reflective strips 211 and adjacent second reflective strips 221, and in conjunction with the light control component 30, all first-order reflected light and all third-order reflected light can be intercepted, that is, all odd-order reflected light can be intercepted, thereby reducing crosstalk images formed by odd-order reflected light. Other explanations are provided in the above embodiments and will not be repeated here.

[0081] Based on the same inventive concept, this application also provides an aerial levitation display device, which includes a display module of one of the aforementioned embodiments.

[0082] As can be seen from the above embodiments:

[0083] This application provides a display module and an aerial levitation display device. The display module includes a display panel, a negative refractive index plate, and a light control component. The negative refractive index plate is disposed on the light-emitting side of the display panel. The negative refractive index plate is configured to reflect a first emitted light from the display panel and guide the first emitted light from the light-emitting side of the negative refractive index plate as a second emitted light. The light control component is disposed on the light-emitting side of the negative refractive index plate. The light control component is configured to intercept at least a portion of the second emitted light that has been reflected an odd number of times by the negative refractive index plate, so as to reduce crosstalk light that affects the aerial imaging effect and improve the image crosstalk problem in aerial levitation display schemes that use a negative refractive index plate as a reflective element.

[0084] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0085] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display module, comprising: Display panel; A negative refractive index plate is disposed on the light-emitting side of the display panel. The negative refractive index plate is configured to reflect the first emitted light from the display panel and to guide the first emitted light from the light-emitting side of the negative refractive index plate as a second emitted light. A light control component is disposed on the light-emitting side of the negative refractive index plate, and the light control component is configured to intercept at least a portion of the second emitted light that has been reflected an odd number of times by the negative refractive index plate.

2. The display module according to claim 1, wherein, The negative refractive index plate includes: The first reflective layer includes a plurality of first reflective strips arranged along a first direction, each of the first reflective strips including two opposing first reflective surfaces, the first direction being perpendicular to the first reflective surfaces; The second reflective layer is located on the side of the first reflective layer away from the display panel. The second reflective layer includes a plurality of second reflective strips arranged along a second direction. Each second reflective strip includes two opposing second reflective surfaces. The second reflective surfaces intersect the first reflective surfaces perpendicularly. The second direction is perpendicular to the second reflective surfaces and perpendicular to the first direction. The light-controlling component is disposed on the side of the second reflective layer away from the first reflective layer.

3. The display module according to claim 2, wherein, The first emitted light from the display panel includes circularly polarized light, and the light control component includes a circular polarizer, the rotation direction of which is the same as that of the circularly polarized light.

4. The display module according to claim 3, wherein, The circularly polarized light is left-handed circularly polarized light, and the circular polarizer is a left-handed circular polarizer.

5. The display module according to claim 3, wherein, The circularly polarized light is right-handed circularly polarized light, and the circular polarizer is right-handed circularly polarized light.

6. The display module according to claim 3, wherein, The circular polarizer comprises a quarter-wave plate and a linear polarizer stacked together.

7. The display module according to claim 2, wherein, The first emitted light from the display panel includes linearly polarized light, and the light control component includes a linear polarizer. The display module further includes a dimming component, which is disposed between adjacent first reflective strips and / or adjacent second reflective strips. The dimming component is configured to cooperate with the negative refractive index plate to change the polarization direction of the linearly polarized light.

8. The display module according to claim 7, wherein, The dimming component includes a quarter-wave plate.

9. The display module according to claim 7, wherein, The polarization direction of the linear polarizer is perpendicular to the polarization direction of the linearly polarized light; the dimming component is disposed between adjacent first reflective strips or between adjacent second reflective strips.

10. The display module according to claim 9, wherein, The linear polarizer is a horizontal polarizer, and the linearly polarized light is vertically polarized light; the dimming component is disposed between adjacent second reflective strips.

11. The display module according to claim 9, wherein, The linear polarizer is a vertical polarizer, and the linearly polarized light is horizontally polarized light; the dimming component is disposed between adjacent second reflective strips.

12. The display module according to claim 9, wherein, The linear polarizer is a horizontal polarizer, and the linearly polarized light is vertically polarized light; the dimming component is disposed between adjacent first reflective strips.

13. The display module according to claim 9, wherein, The linear polarizer is a vertical polarizer, and the linearly polarized light is horizontally polarized light; the dimming component is disposed between adjacent first reflective strips.

14. The display module according to claim 7, wherein, The polarization direction of the linear polarizer is the same as that of the linearly polarized light; the dimming component is disposed between adjacent first reflective strips and between adjacent second reflective strips.

15. The display module according to claim 14, wherein, The linear polarizer is a vertical polarizer, and the linearly polarized light is vertically polarized light.

16. The display module according to claim 14, wherein, The linear polarizer is a horizontal polarizer, and the linearly polarized light is horizontally polarized light.

17. The display module according to claim 1, wherein, The negative refractive index plate is tilted relative to the display panel, and the tilt angle between the negative refractive index plate and the display panel ranges from 10 degrees to 50 degrees.

18. The display module according to claim 1, wherein, The display panel includes a light-emitting diode display panel, a liquid crystal display panel, a silicon-based liquid crystal display panel, an organic light-emitting diode display panel, a micro light-emitting diode display panel, a sub-millimeter light-emitting diode display panel, a projection, a laser, and a laser diode.

19. An aerial levitation display device comprising a display module as claimed in any one of claims 1 to 18.

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