Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a transparent substrate, a transparent light-emitting layer and a lens function layer. The transparent light-emitting layer is arranged on one side of the transparent substrate, the lens function layer and the transparent substrate are located on the same side of the transparent light-emitting layer, the lens function layer comprises a first surface and a second surface, the first surface is located between the second surface and the transparent light-emitting layer, and the first surface is parallel to the transparent substrate. At least part of the second surface is obliquely arranged relative to the first surface, the first film layer is attached to the first surface, and the refractive index of the lens function layer is larger than that of the first film layer.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular, relates to a display panel and a display device. Background Art

[0002] With the development of display technology, the performance requirements for display devices are getting higher and higher. On this basis, transparent display panels with both display and light transmission functions have come into being. However, transparent display panels still have the problem of poor display effects. Therefore, how to improve the display effects of transparent display panels has become the research direction of many manufacturers. Summary of the invention

[0003] Embodiments of the present application provide a display panel and a display device, which can improve display effects.

[0004] An embodiment of a first aspect of the embodiments of the present application provides a display panel, including:

[0005] Transparent substrate;

[0006] A transparent light-emitting layer is disposed on one side of the transparent substrate;

[0007] A lens function layer, which is located on the same side of the transparent light-emitting layer as the transparent substrate, and includes a first surface and a second surface, wherein the first surface is located between the second surface and the transparent light-emitting layer, the first surface is parallel to the transparent substrate, and at least a portion of the second surface is inclined relative to the first surface;

[0008] The first film layer is bonded to the first surface, and the refractive index of the lens function layer is greater than the refractive index of the first film layer.

[0009] In some embodiments, the lens function layer includes a plurality of prism structures, and the second surface includes a prism surface located on a side of the prism structure away from the transparent light-emitting layer;

[0010] In some embodiments, light incident from the second surface to the lens functional layer and within the first preset angle range is totally reflected at the first surface;

[0011] In some embodiments, the plurality of prism structures include at least one of a right angle prism, a porro prism, a corner cube prism, and a dove prism;

[0012] In some embodiments, the transparent light-emitting layer has a light-emitting region and a transparent region, and the orthographic projection of the prism structure on the transparent light-emitting layer is at least partially located in the light-emitting region;

[0013] In some embodiments, the orthographic projection of the prism structure on the transparent light-emitting layer is partially located in the light-emitting region and partially located in the transparent region.

[0014] In some embodiments, the lens function layer includes a plurality of convex lens structures, and the second surface includes an arc-shaped surface located on a side of the convex lens structure away from the transparent light-emitting layer, and the arc-shaped surface protrudes in a direction away from the transparent light-emitting layer;

[0015] In some embodiments, the transparent light-emitting layer has a light-emitting region and a transparent region, and the orthographic projection of the convex lens structure on the transparent light-emitting layer is at least partially located in the light-emitting region;

[0016] In some embodiments, the orthographic projection of the convex lens structure on the transparent light-emitting layer is partially located in the light-emitting area and partially located in the transparent area.

[0017] In some embodiments, the transparent substrate is reused as the first film layer, the transparent substrate is bonded to the first surface, and the refractive index of the lens functional layer is greater than the refractive index of the transparent substrate; or,

[0018] The transparent substrate is located on a side of the lens functional layer away from the transparent light emitting layer.

[0019] In a second aspect, an embodiment of the present application provides a display panel, including:

[0020] Transparent substrate;

[0021] A transparent light-emitting layer is disposed on one side of the transparent substrate;

[0022] The optical waveguide layer and the transparent substrate are arranged on the same side of the transparent light emitting layer.

[0023] In some embodiments, the light waveguide layer includes a third surface and a fourth surface, the third surface being located between the fourth surface and the transparent light emitting layer;

[0024] The display panel further includes a coupling grating disposed in contact with the fourth surface, the coupling grating being used to couple light within a preset angle range into the optical waveguide layer;

[0025] In some embodiments, the display panel further includes an out-coupling grating disposed in contact with the fourth surface and spaced apart from the in-coupling grating, the out-coupling grating being used to allow the light coupled into the optical waveguide layer by the in-coupling grating to leave the optical waveguide layer through the out-coupling grating;

[0026] In some embodiments, the transparent light-emitting layer has a light-emitting region and a transparent region, and the orthographic projection of the coupling-in grating on the transparent light-emitting layer is located in the light-emitting region;

[0027] In some embodiments, the orthographic projection of the outcoupling grating on the transparent light emitting layer is located within the transparent region.

[0028] In some embodiments, the light quantity adjustment layer is further included, the light quantity adjustment layer and the transparent substrate are located on the same side of the transparent light emitting layer, the light quantity adjustment layer has a first state and a second state, and the transmittance of the light quantity adjustment layer in the first state is greater than the transmittance of the light quantity adjustment layer in the second state;

[0029] In some embodiments, the light quantity adjustment layer is located between the transparent substrate and the transparent light emitting layer;

[0030] In some embodiments, the light amount adjustment layer is located on a side of the transparent substrate away from the transparent light emitting layer.

[0031] In some embodiments, the light amount adjustment layer includes a first electrode and a second electrode disposed at intervals, and a liquid crystal layer located between the first electrode and the second electrode;

[0032] In some embodiments, the first electrode and the second electrode are spaced apart from each other along a thickness direction of the transparent substrate.

[0033] In some embodiments, the light amount adjustment layer includes an electrochromic structure and an electric control structure, and the electric control structure is used to adjust the color of the electrochromic structure;

[0034] In some embodiments, the electrochromic structure includes an electrochromic layer, an electrolyte layer, and an ion storage layer stacked along a thickness direction of a transparent substrate;

[0035] In some embodiments, the electric control structure includes a first power supply layer and a second power supply layer, and the first power supply layer and the second power supply layer are arranged on both sides of the electrochromic structure along the thickness direction of the transparent substrate.

[0036] In a third aspect, an embodiment of the present application provides a display device, comprising a display panel in any of the aforementioned embodiments.

[0037] In the display panel provided by the present application, by adding a lens function layer in the display panel, and setting the refractive index of the lens function layer to be greater than the refractive index of the first film layer, part of the ambient light incident on the lens function from the back of the display panel can be totally reflected at the first surface, thereby reducing the amount of ambient light emitted from the front of the display panel, while meeting the transparent display, reducing the adverse effect of ambient light on the display, and improving the display effect. Alternatively, by adding an optical waveguide layer in the display panel, part of the ambient light incident on the optical waveguide layer from the back of the display panel can be totally reflected in the optical waveguide layer, so that it cannot be emitted from the front of the display panel, thereby meeting the transparent display requirements of the display panel, reducing the effect of ambient light on the display effect, and improving the display quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 is a top view of a display panel provided in an embodiment of the present application;

[0040] Figure 2 yes Figure 1 A cross-sectional view along the line A-A';

[0041] Figure 3 yes Figure 1 Another cross-sectional view along the middle line A-A'

[0042] Figure 4 yes Figure 1 Another cross-sectional view along the middle line A-A';

[0043] Figure 5 yes Figure 1 Another cross-sectional view along the middle line A-A';

[0044] Figure 6 yes Figure 1 Another cross-sectional view along the middle line A-A';

[0045] Figure 7 yes Figure 1 Another cross-sectional view along the middle line A-A';

[0046] Figure 8 is a schematic structural diagram of a light intensity adjustment layer in a display panel provided in an embodiment of the present application;

[0047] Fig. 9 is another structural schematic diagram of a light intensity adjustment layer in a display panel provided in an embodiment of the present application;

[0048] Fig.10 It is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] The features and exemplary embodiments of various aspects of the application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the application. However, it is obvious to those skilled in the art that the application can be implemented when some details in these specific details are not needed. The following description of the embodiments is only to provide a better understanding of the application by illustrating the example of the application.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0051] With the development of display technology, the performance requirements of display devices are getting higher and higher. Transparent display panels include a display area and a light-transmitting area, so they can achieve both display and perspective, that is, objects behind the transparent display panel are still visible while displaying, and their applications are becoming more and more extensive. However, when the transparent display panel is in a strong light environment, the ambient light passing through the display panel may even affect the self-luminous effect of the display panel, reduce the display quality, and affect the display effect.

[0052] In view of the above problems, the embodiments of the present application provide a display panel and a display device. In order to better understand the present application, the following is combined with Figures 1 to 10 The display panel and the display device according to the embodiments of the present application are described in detail.

[0053] See also Figure 1 and Figure 2 The embodiment of the present application provides a display panel 1, comprising a transparent substrate 11, a transparent light emitting layer 12 and a lens function layer 13. The transparent light emitting layer 12 is arranged on one side of the transparent substrate 11, the lens function layer 13 and the transparent substrate 11 are located on the same side of the transparent light emitting layer 12, the lens function layer 13 comprises a first surface 131 and a second surface 132, the first surface 131 is located between the second surface 132 and the transparent light emitting layer 12, the first surface 131 is parallel to the transparent substrate 11, at least part of the second surface 132 is inclined relative to the first surface 131, the first film layer 14 is arranged in contact with the first surface 131, and the refractive index of the lens function layer 13 is greater than the refractive index of the first film layer 14.

[0054] The display panel 1 provided in the present application is a panel structure capable of realizing a transparent display function. The transparent substrate 11 is a film layer in the display panel 1 that can play a supporting role and includes a transparent material. The transparent light-emitting layer 12 is a main film layer in the display panel 1 for realizing a display function. The transparent light-emitting layer 12 is arranged on one side of the transparent substrate 11. The transparent light-emitting layer 12 is composed of at least two regions, one of which is provided with a light-emitting device 120, and the light-emitting device 120 can meet the light-emitting display needs of the display panel. The other region is not provided with a light-emitting device 120 and includes a transparent material, so that the display panel 1 can realize both display and perspective. Among them, the embodiment of the present application does not limit the shape, size, and specific layout of the above two regions.

[0055] It should be noted that the light emitting device 120 includes various types, such as OLED light emitting device, Micro LED, MiniLED, etc., which are not specifically limited in this application. When an OLED light emitting device 120 is included, it may include a first electrode, a light emitting functional layer, and a second electrode stacked in a direction away from the transparent substrate 11.

[0056] The lens function layer 13 is used to adjust the propagation path corresponding to the ambient light incident into the display panel 1, and the lens function layer 13 and the transparent substrate 11 are located on the same side of the transparent light emitting layer 12. Specifically, the light emitting device 120 in the transparent light emitting layer 12 may have a light emitting surface and a backlight surface opposite to each other, and the lens function layer 13 and the transparent substrate 11 are both arranged on the backlight surface side of the light emitting device 120. The lens function layer 13 may be located on the side of the transparent substrate 11 facing the transparent light emitting layer 12, or may be located on the side of the transparent substrate 11 facing away from the transparent light emitting layer 12.

[0057] The lens functional layer 13 is a functional film layer that allows light to pass through and can change the propagation direction of light. The lens functional layer 13 includes a first surface 131 and a second surface 132 that are opposite to each other. The first surface 131 is located on the side of the second surface 132 facing the transparent light-emitting layer 12. Part of the ambient light incident from the back of the display panel 1 will enter the lens functional layer 13 through the second surface 132, leave from the first surface 131 and enter the first film layer 14 and the transparent light-emitting layer 12 in turn, and finally exit from the front of the display panel 1 and be observed by the user, so as to achieve a transparent display effect.

[0058] In order to reduce the adverse effects of ambient light on the display effect under strong light and other conditions, the embodiment of the present application imposes restrictions on the structure and refractive index of the lens function layer 13. Specifically, the first surface 131 and the second surface 132 are not arranged parallel to each other, the first surface 131 is parallel to the transparent substrate 11, and at least part of the second surface 132 is arranged obliquely relative to the first surface 131. The second surface 132 is used to adjust the propagation direction of the light incident on the lens function layer 13 from the back of the display panel 1, so that at least part of the light can move to the first surface 131 along a preset direction.

[0059] Furthermore, since the first film layer 14 is bonded to the first surface 131 and the refractive index of the lens functional layer 13 is greater than that of the first film layer 14, the light in a large angle range that moves to the first surface 131 will be totally reflected on the first surface 131, and thus cannot be emitted from the front of the display panel 1, thereby helping to reduce the amount of ambient light emitted from the front of the display panel 1, while the other part of the ambient light can still be observed by the user through the lens functional layer 13. This design can reduce the adverse effects of ambient light on the display while satisfying the transparent display, thereby improving the display effect.

[0060] It should be noted that the specific form of the first film layer 14 is not limited in the embodiment of the present application. For example, the first film layer 14 can be a film layer structure that plays an insulating or flattening role, and is arranged on both sides of the lens function layer 13 with the transparent substrate 11. Alternatively, the first film layer 14 and the transparent substrate 11 can be arranged between the lens function layer 13 and the transparent light-emitting layer 12. In this case, the first film layer 14 and the transparent substrate 11 can be two independent film layers and the transparent substrate 11 is located on the side of the first film layer 14 away from the lens function layer, or the transparent substrate 11 can be reused as the first film layer 14, and the embodiment of the present application does not limit this.

[0061] In summary, in the embodiment of the present application, a lens functional layer 13 is additionally provided in the display panel 1, and the refractive index of the lens functional layer 13 is set to be greater than the refractive index of the first film layer 14, so that part of the ambient light incident on the lens functional layer 13 from the back of the display panel 1 can be totally reflected at the first surface 131, thereby reducing the amount of ambient light emitted from the front of the display panel 1, while satisfying transparent display, reducing the adverse effects of ambient light on the display, and improving the display effect.

[0062] It should be noted that the embodiment of the present application does not limit the preparation form of the lens function layer 13 relative to other film layers. Optionally, the lens function layer 13 can be a prefabricated part, that is, the lens function layer 13 can be prepared separately, thereby improving the preparation yield of the lens function layer 13 and the display panel 1, and the preparation process of the display panel 1 can be unchanged, thereby saving costs. This embodiment is easy to assemble and has a high assembly yield.

[0063] In addition, the embodiment of the present application does not limit the specific light regulation effect of the lens functional layer 13, as long as part of the ambient light incident from the back of the display panel 1 can be totally reflected at the first surface 131, thereby returning to the back of the display panel 1 and emitting, and the other part of the ambient light can pass through the first surface 131 and can be observed by the user. Optionally, the ambient light vertically incident from the back of the display panel 1 can be totally reflected under the action of the lens functional layer 13, thereby reducing the influence of the vertically incident ambient light on the display effect.

[0064] In some embodiments, see Figure 3 The lens function layer 13 includes a plurality of prism structures 133 , and the second surface 132 includes a prism surface 134 located on a side of the prism structure 133 away from the transparent light emitting layer 12 .

[0065] The prism structure 133 is a transparent object formed by a plurality of planes that intersect each other but are not parallel to each other. The prism structure 133 may be a polyhedron structure. The prism surface 134 is a surface located on the prism structure 133. Ambient light incident from the back of the display panel 1 can be incident into the prism structure 133 through the prism surface 134.

[0066] On this basis, by adjusting the inclination angle of the prism surface 134 relative to the first surface 131, the propagation direction of the light can be controlled, so that at least part of the light can move to the first surface 131 along the preset propagation direction and be totally reflected at the first surface 131, thereby reducing the adverse effects of ambient light on the display while satisfying transparent display and improving the display effect.

[0067] In some optional embodiments, light incident on the lens function layer 13 from the second surface 132 and within the first preset angle range is reflected at the first surface 131 .

[0068] In the embodiment of the present application, by adjusting the inclination angle of the prism surface 134 relative to the first surface 131, as well as parameters such as the refractive index of the lens functional layer 13, it is possible to effectively control at least part of the light, so that the light incident from the back of the display panel 1 and within the first preset angle range can be adjusted to a specific propagation direction via the second surface 132 and undergo total reflection at the second surface 131, thereby improving the display effect.

[0069] It should be noted that the specific values ​​of the first preset angle range are not limited in the embodiments of the present application. For example, the first preset angle range may be the angle range corresponding to the part of the ambient light incident from the back of the display panel 1 and having a greater impact on the display effect in actual use. Optionally, the first preset angle range includes 90°, that is, the light incident vertically to the display panel 1.

[0070] In some embodiments, the plurality of prism structures 133 include at least one of a right-angle prism, a Porro prism, a corner-cube prism, and a Dove prism.

[0071] Specifically, the prism structure 133 includes a Porro prism as an example for explanation. The Porro prism includes a first surface 131, a third surface, and a fourth surface connected end to end in sequence. The first surface 131 is parallel to the plane where the transparent substrate 11 is located. The third surface and the fourth surface are located on the side of the first surface 131 away from the transparent light-emitting layer 12, and the angle between the third surface and the fourth surface and the first surface is 45°. Among them, the third surface and the fourth surface are both prism surfaces 134 and are used together to form the second surface 132.

[0072] Furthermore, the angle between the third surface and the fourth surface can be 90°, and part of the ambient light incident from the back of the display panel 1 can enter the prism structure 133 through the third surface, and be totally reflected at the first surface 131, and finally exit the prism structure 133 through the fourth surface, thereby reducing the amount of ambient light emitted from the display panel 1 to improve the display quality.

[0073] In some embodiments, the transparent light emitting layer 12 has a light emitting region 121 and a transparent region 122 , and the orthographic projection of the prism structure 133 on the transparent light emitting layer 12 is at least partially located in the light emitting region 121 .

[0074] The light-emitting area 121 is an area in the transparent light-emitting layer 12 where the light-emitting device 120 is provided. A single light-emitting area 121 may have only one light-emitting device 120, or may have multiple light-emitting devices 120 at the same time, which is not limited in the embodiment of the present application. Optionally, multiple light-emitting devices 120 together constitute a pixel, and at least one pixel is provided in a single light-emitting area 121. The transparent area 122 is an area in the transparent light-emitting layer 12 where no light-emitting device 120 is provided and where a transparent material is provided. Optionally, the transparent area 122 may be filled with a transparent organic material to reduce the step difference between the light-emitting area 121 and the transparent area 122 of the transparent light-emitting layer 12, so as to facilitate the preparation of subsequent film layers.

[0075] Furthermore, in an embodiment of the present application, at least part of the prism structure 133 is arranged corresponding to the light-emitting area 121. In this case, the presence of the prism structure 133 can reduce the risk of ambient light incident from the back of the display panel 1 propagating to the light-emitting area 121, reduce the influence of ambient light on the light-emitting effect of the transparent light-emitting layer 12 itself, and help improve the display quality of the display panel 1.

[0076] In some optional embodiments, such as Figure 3 As shown, the prism structure 133 is partially located in the light-emitting area 121 and partially located in the transparent area 122 in the orthographic projection of the transparent light-emitting layer 12. In this way, the lens functional layer 13 can regulate the ambient light incident on the light-emitting area 121 and the ambient light incident on the transparent area 122, thereby further improving the display effect of the display panel 1.

[0077] In some embodiments, Figure 2 As shown, the lens function layer 13 includes a plurality of convex lens structures 135 , and the second surface 132 includes an arcuate surface 136 located on a side of the convex lens structure 135 away from the transparent light emitting layer 12 , and the arcuate surface 136 protrudes in a direction away from the transparent light emitting layer.

[0078] The convex lens structure 135 is a lens structure that is thick in the middle and thin at the edges. The arc surface 136 on the convex lens structure 135 is located on the side of the first surface 131 away from the transparent light-emitting layer 12. On this basis, the ambient light incident from the front of the display panel 1 can enter the convex lens structure 135 through the first surface 131, and is converged by the convex lens structure 135 and finally emitted from the arc surface 136. The ambient light incident from the back of the display panel 1 can enter the convex lens structure 135 through the arc surface 136, and is scattered to adjust the inclination angle of part of the ambient light relative to the first surface 131. After that, more ambient light after being scattered will be totally reflected at the first surface 131. This design can reduce the amount of ambient light emitted from the front of the display panel 1 to the user, thereby improving the display quality.

[0079] In some embodiments, in some embodiments, the transparent light emitting layer 12 has a light emitting area 121 and a transparent area 122 , and the orthographic projection of the convex lens structure 135 on the transparent light emitting layer 12 is at least partially located in the light emitting area 121 .

[0080] In an embodiment of the present application, at least part of the convex lens structure 135 is arranged corresponding to the light-emitting area 121. In this case, the presence of the convex lens structure 135 can reduce the risk of ambient light incident from the back of the display panel 1 propagating to the light-emitting area 121, reduce the influence of ambient light on the light-emitting effect of the transparent light-emitting layer 12 itself, and help improve the display quality of the display panel 1.

[0081] In some optional embodiments, such as Figure 2 As shown, the convex lens structure 135 is partially located in the light-emitting area 121 and partially located in the transparent area 122 in the orthographic projection of the transparent light-emitting layer 12. In this way, the lens functional layer 13 can regulate the ambient light incident on the light-emitting area 121 and the ambient light incident on the transparent area 122, thereby further improving the display effect of the display panel 1.

[0082] In some embodiments, see Figure 4 The transparent substrate 11 is reused as the first film layer 14 , the transparent substrate 11 is bonded to the first surface 131 , and the refractive index of the lens functional layer 13 is greater than the refractive index of the transparent substrate 11 .

[0083] In the embodiment of the present application, the transparent substrate 11 can have a variety of positional relationships relative to the lens functional layer 13. The transparent substrate 11 can be arranged on the side of the lens functional layer 13 facing the transparent light-emitting layer 12. In this case, the transparent substrate 11 can act as a first film layer 14 for being bonded to the first surface 131. Furthermore, by setting the refractive index of the lens functional layer 13 to be greater than the refractive index of the transparent substrate 11, the ambient light incident from the back of the display panel 1 can be totally reflected at the interface between the lens functional layer 13 and the transparent substrate 11, that is, the first surface 131, so as to reduce the influence of ambient light on the display effect while satisfying transparent display, thereby improving the display quality.

[0084] Of course, in some embodiments, such as Figure 2 and Figure 3 As shown, the transparent substrate 11 is located on the side of the lens function layer 13 facing away from the transparent light emitting layer 12 .

[0085] In the embodiment of the present application, the lens function layer 13 and the transparent light emitting layer 12 can be located on the same side of the transparent substrate 11, and the transparent substrate 11 can simultaneously support the lens function layer 13 and the transparent light emitting layer 12. Further, the first film layer 14 and the transparent substrate 11 are different film layer structures, wherein the first film layer 14 and the transparent substrate 11 may include the same material or different materials according to different refractive index requirements, and the embodiment of the present application is not limited to this.

[0086] Second, see Figure 5 The embodiment of the present application provides a display panel 1, comprising a transparent substrate 11, a transparent light emitting layer 12 and a light waveguide layer 15. The transparent light emitting layer 12 is disposed on one side of the transparent substrate 11, and the light waveguide layer 15 and the transparent substrate 11 are located on the same side of the transparent light emitting layer 12.

[0087] The display panel 1 provided in the present application is a panel structure capable of realizing a transparent display function. The transparent substrate 11 is a film layer in the display panel 1 that can play a supporting role and includes a transparent material. The transparent light-emitting layer 12 is a main film layer in the display panel 1 for realizing a display function. The transparent light-emitting layer 12 is arranged on one side of the transparent substrate 11. The transparent light-emitting layer 12 is composed of at least two regions, one of which is provided with a light-emitting device 120, and the light-emitting device 120 can meet the light-emitting display needs of the display panel. The other region is not provided with a light-emitting device 120 and includes a transparent material, so that the display panel 1 can realize both display and perspective. Among them, the embodiment of the present application does not limit the shape, size, and specific layout of the above two regions.

[0088] It should be noted that the light emitting device 120 includes various types, such as OLED light emitting device, Micro LED, MiniLED, etc., which are not specifically limited in this application. When an OLED light emitting device 120 is included, it may include a first electrode, a light emitting functional layer, and a second electrode stacked in a direction away from the substrate 11.

[0089] The optical waveguide layer 15 is used to adjust the propagation path corresponding to the ambient light incident into the display panel 1, and the optical waveguide layer 15 and the transparent substrate 11 are located on the same side of the transparent light emitting layer 12. Specifically, the light emitting device 120 in the transparent light emitting layer may have a light emitting surface and a backlight surface opposite to each other, and the optical waveguide layer 15 and the transparent substrate 11 are both arranged on the backlight surface side of the light emitting device 120. The optical waveguide layer 15 may be located on the side of the transparent substrate 11 facing the transparent light emitting layer 12, or may be located on the side of the transparent substrate 11 facing away from the transparent light emitting layer 12, and the optical waveguide layer 15 may be arranged in contact with the transparent substrate 11, or the two may be arranged spaced apart from each other.

[0090] The optical waveguide layer 15 is a film structure for transmitting and guiding light. Specifically, the optical waveguide layer 15 is used to transmit and guide light therein and constrain it to reduce the free propagation of light in a specific space. The optical waveguide layer 15 may include two or more materials with different refractive indices, and the guidance and processing of light is achieved through the effects of interface refraction, reflection, etc. in these stacked structures.

[0091] Furthermore, the optical waveguide layer 15 can utilize the total reflection phenomenon on the interface of media with different refractive indices to confine the light to propagate in the optical waveguide layer 15. On this basis, part of the ambient light incident into the optical waveguide layer 15 from the back of the display panel 1 can be totally reflected in the optical waveguide layer 15, and thus cannot be emitted from the front of the display panel 1, while the other part of the ambient light can pass through the optical waveguide layer 15 and be observed by the user, thereby meeting the transparent display requirements of the display panel 1 while reducing the influence of ambient light on the display effect and improving the display quality.

[0092] It should be noted that the present embodiment does not limit the preparation form of the optical waveguide layer 15 relative to other film layers. Optionally, the optical waveguide layer 15 can be a prefabricated part, that is, the optical waveguide layer 15 can be prepared separately, thereby improving the preparation yield of the optical waveguide layer 15 and the display panel 1, and the preparation process of the display panel 1 does not need to be changed, thereby saving costs. In addition, this embodiment is easy to assemble and has a high assembly yield.

[0093] In addition, the specific adjustment effect of the optical waveguide layer 15 on light is not limited in the embodiments of the present application, as long as part of the ambient light incident from the back of the display panel 1 can be totally reflected in the optical waveguide layer 15, thereby returning to the back of the display panel 1 and emitting, while the other part of the ambient light can pass through the optical waveguide layer 15 and can be observed by the user. Optionally, the ambient light incident vertically from the back of the display panel 1 can be totally reflected by the optical waveguide layer 15, thereby reducing the influence of the vertically incident ambient light on the display effect. In some embodiments, please refer to Figure 6 The optical waveguide layer 15 includes a third surface 151 and a fourth surface 152, and the third surface 151 is located between the fourth surface 152 and the transparent light emitting layer 12. The display panel 1 also includes a coupling grating 161 arranged in contact with the fourth surface, and the coupling grating 161 is used to couple light within a preset angle range into the optical waveguide layer 15.

[0094] The third surface 151 and the fourth surface 15 are two opposite surfaces of the optical waveguide layer 15. The third surface 151 and the fourth surface 15 can be arranged parallel to each other, or there can be a certain inclination angle between the two, which is not limited in the embodiment of the present application. Optionally, the third surface 151 and the fourth surface 15 are both parallel to the plane where the transparent substrate 11 is located.

[0095] The third surface 151 is located on the side of the optical waveguide layer 15 facing the transparent light-emitting layer 12, and the fourth surface 152 is located on the side of the optical waveguide layer 15 facing away from the transparent light-emitting layer 12. The ambient light incident from the back of the display panel 1 can enter the optical waveguide layer 15 through the fourth surface 152, and leave from the third surface 151 to enter the transparent light-emitting layer 12, and finally be emitted from the front of the display panel 1 and observed by the user.

[0096] On this basis, in order to reduce the impact of ambient light on the display effect, the embodiment of the present application further adds a coupling grating 161. The coupling grating 161 is an optical element that uses the diffraction effect of the grating to couple light. The coupling grating 161 usually includes a plurality of periodically arranged grating units. These grating units can emit the incident light beam in a specific diffraction order, thereby realizing light coupling.

[0097] The coupling-in grating 161 is arranged in close contact with the fourth surface 152, so that part of the ambient light incident from the back of the display panel 1 can be diffracted in the coupling-in grating 161, so that the light in a preset angle range is coupled into the optical waveguide layer 15 and is totally reflected in the optical waveguide layer 15, thereby reducing the influence of the ambient light on the display effect and improving the display quality.

[0098] It should be noted that the embodiment of the present application does not limit the preset angle interval corresponding to the coupling grating 161, as long as the ambient light diffracted by the coupling grating 161 and entering the optical waveguide layer 15 can be totally reflected in the optical waveguide layer 15. Optionally, the preset angle interval includes 90°, that is, the light vertically incident on the display panel 1. In addition, the embodiment of the present application also does not limit the specific positional relationship of the coupling grating 161 relative to the transparent area 122 and the light-emitting area 121.

[0099] In some optional embodiments, the orthographic projection of the coupling grating 161 on the transparent light-emitting layer 12 is located in the light-emitting area 121. Under this design, the ambient light incident from the back of the display panel 1 into the light-emitting area 121 will first enter the coupling grating 161 to be diffracted, and propagate to the optical waveguide layer 15 to be totally reflected, thereby reducing the amount of ambient light emitted from the light-emitting area 121 to the user, thereby reducing the impact of ambient light on the display effect of the light-emitting device 120 located in the light-emitting area 121, and improving the display quality. In addition, the ambient light incident from the back of the display panel 1 into the transparent area 122 will not enter the coupling grating 161 to be diffracted, so at least part of the ambient light can enter the transparent area 122 through the optical waveguide layer 15, thereby realizing transparent display of the display panel.

[0100] In some embodiments, Figure 6As shown, the display panel 1 further includes an outcoupling grating 162 disposed in contact with the fourth surface 152 , and the outcoupling grating 162 is used to allow the light coupled into the optical waveguide layer 15 by the coupling grating 161 to leave the optical waveguide layer 15 through the outcoupling grating 162 .

[0101] The coupling-in grating 161 and the coupling-out grating 162 have a corresponding relationship. Specifically, the coupling-in grating 161 is used to couple the ambient light within a preset angle range into the optical waveguide layer 15, and the optical waveguide layer 15 is used to make the part of the ambient light undergo total reflection. Then, the coupling-out grating 162 is used to couple the ambient light coupled by the coupling-in grating 161 and undergoing total reflection out of the optical waveguide layer 15. In this way, part of the ambient light incident from the back side of the display panel 1 is returned and emitted from the back side of the display panel under the cooperation of the coupling-in grating 161, the coupling-out grating 162 and the optical waveguide layer 15, thereby reducing the influence of the ambient light on the display effect and improving the display quality.

[0102] Optionally, the orthographic projection of the outcoupling grating 162 on the transparent light-emitting layer 12 is located within the transparent area 122 , so that at least part of the ambient light incident from the back of the display panel 1 to the light-emitting area 121 can be emitted back from the back of the display panel at the area corresponding to the transparent area 122 .

[0103] In some embodiments, see Figure 7 The display panel 1 also includes a light intensity adjustment layer 17, which is located on the same side of the transparent light-emitting layer 12 as the transparent substrate 11. The light intensity adjustment layer 17 has a first state and a second state. The transmittance of the light intensity adjustment layer 17 in the first state is greater than the transmittance of the light intensity adjustment layer 17 in the second state.

[0104] The light quantity adjustment layer 17 is a film structure in the display panel 1 that can adjust the corresponding amount of light transmitted by itself, and the light quantity adjustment layer 17 is located on the backlight side of the light emitting device 120 in the transparent light emitting layer 12. The light quantity adjustment layer 17 can actively or passively adjust its ability to transmit light, so that it can have two states, a first state and a second state, wherein the transmittance of the light quantity adjustment layer 17 in the first state is greater than the transmittance of the light quantity adjustment layer 17 in the second state, that is, the light quantity adjustment layer 17 in the first state can allow a large amount of light to pass through, while the light quantity adjustment layer 17 in the second state only allows a small amount of light to pass through.

[0105] The light intensity adjustment layer 17 and the transparent substrate 11 are located on the same side of the transparent light emitting layer 12. Optionally, the light intensity adjustment layer 17 can be located on the side of the transparent substrate 11 facing the transparent light emitting layer 12, or can be located on the side of the transparent substrate 11 facing away from the transparent light emitting layer 12. The light intensity adjustment layer 17 can be arranged in contact with the transparent substrate 11, or the two can be arranged spaced apart from each other.

[0106] Further, when the display panel 1 includes the lens function layer 13, the light amount adjustment layer 17 can be located on the side of the lens function layer 13 facing the transparent light emitting layer 12, or can also be located on the side of the lens function layer 13 away from the transparent light emitting layer 12. Similarly, when the display panel 1 includes the light waveguide layer 15, the light amount adjustment layer 17 can be located on the side of the waveguide layer 15 facing the transparent light emitting layer 12, or can also be located on the side of the waveguide layer 15 away from the transparent light emitting layer 12. Figure 7 3 shows a case where the light quantity adjustment layer 17 is located on the side of the waveguide layer 15 facing the transparent light emitting layer 12 .

[0107] In the embodiment of the present application, by adding a light intensity adjustment layer 17 in the display panel 1, and by the cooperation between the light intensity adjustment layer 17 and the lens functional layer 13, or by the cooperation between the light intensity adjustment layer 17 and the optical waveguide layer 15, flexible control of the light intensity corresponding to the ambient light emitted from the front of the display panel 1 is achieved, which helps to meet different needs in different usage scenarios and has strong practicality and flexibility.

[0108] In some optional embodiments, a sensor element for detecting the intensity of ambient light may be provided in the display panel 1. When the sensor element detects that the intensity of ambient light is relatively high, the display panel 1 may control the light intensity adjustment layer 17 to be in the second state to reduce the influence of ambient light on the display effect and improve the display effect. When the sensor element detects that the intensity of ambient light is relatively low, the display panel 1 may control the light intensity adjustment layer 17 to be in the first state, so that the transparent display function can be realized at the same time with a better display effect to improve the viewing experience.

[0109] In addition, according to different actual needs, the light adjustment layer 17 may have only the first state and the second state, or may also have the third state or even more other states at the same time, as long as the light adjustment layer 17 can have different transmittances in different states. Further optionally, in the second state, the light adjustment layer 17 absorbs not less than 95% of the ambient light incident from the back of the display panel 1, so that when the light adjustment layer 17 is in the second state, the display panel 1 can have an opaque display function, thereby increasing the applicable scenarios of the display panel 1.

[0110] In some embodiments, see Figure 7 and Figure 8 The light amount adjustment layer 17 includes a first electrode 171 and a second electrode 172 which are spaced apart from each other, and a liquid crystal layer 173 located between the first electrode 171 and the second electrode 172 .

[0111] In the embodiment of the present application, the first electrode 171 and the second electrode 172 are used to jointly control the deflection of the liquid crystal in the liquid crystal layer 173 to change the transmittance of the light adjustment layer 17 relative to the ambient light. Optionally, the light adjustment layer 17 may also include a polarizer, and the polarizer and the liquid crystal layer 173 cooperate with each other, so that the light adjustment layer 17 can have different transmittances in different working states.

[0112] In some optional embodiments, the first electrode 171 and the second electrode 172 are arranged at intervals along the thickness direction of the transparent substrate 11. In this case, the first electrode 171, the liquid crystal layer 173 and the second electrode 172 can be stacked in sequence.

[0113] In some other embodiments, see Figure 7 and Fig. 9 The light quantity adjustment layer 17 includes an electrochromic structure 175 and an electric control structure 176 , and the electric control structure 176 is used to adjust the color of the electrochromic structure 175 .

[0114] The electrochromic structure 175 includes an electrochromic material. Electrochromism is a phenomenon in which the optical properties of a material, such as transmittance, can undergo a stable and reversible color change under the action of an external electric field, which is manifested in appearance as a reversible change in color and transparency. The specific type of electrochromic material is not limited in the embodiments of the present application. Exemplarily, the electrochromic structure 175 may include at least one of an inorganic electrochromic material and an organic electrochromic material.

[0115] The electric-controlled structure 176 is used to form an electric field structure that passes through the electrochromic structure 175. With the help of this electric field structure, the color of the electrochromic structure 175 can be changed. On this basis, the embodiment of the present application can achieve a change in the transmittance of the electrochromic structure 175 with the help of the electric-controlled structure 176, thereby meeting the conversion needs of the light quantity adjustment layer 17 between the first state and the second state, thereby meeting the different needs in different usage scenarios, and has strong practicality and flexibility.

[0116] In some embodiments, the electrochromic structure 175 includes an electrochromic layer 1751 , an electrolyte layer 1752 , and an ion storage layer 1753 stacked along the thickness direction of the transparent substrate 11 .

[0117] In the embodiment of the present application, the electrochromic layer 1751 undergoes an oxidation-reduction reaction under the action of an electric field and a voltage, and the color changes; the electrolyte layer 1752 is composed of a special conductive material, such as a solution or solid electrolyte material containing lithium perchlorate, sodium perchlorate, etc.; the ion storage layer 1753 stores corresponding counter ions when the electrochromic layer undergoes an oxidation-reduction reaction, thereby maintaining the charge balance of the entire system. The ion storage layer can also be an electrochromic material with a color-changing property opposite to that of the electrochromic layer, which can achieve the effect of color superposition or complementation.

[0118] In some embodiments, the electric control structure 176 includes a first power supply layer 1761 and a second power supply layer 1762 , and the first power supply layer 1761 and the second power supply layer 1762 are disposed on both sides of the electrochromic structure 175 along the thickness direction of the transparent substrate 11 .

[0119] In the embodiment of the present application, the first power supply layer 1761 and the second power supply layer 1762 are respectively arranged on both sides of the electrochromic structure 175. The first power supply layer 1761 and the second power supply layer 1762 can jointly form an electric field passing through the electrochromic structure 175, and the color of the electrochromic structure 175 can be changed by means of the change of the electric field, thereby realizing the conversion need of the light quantity adjustment layer 17 between the first state and the second state, thereby meeting the different needs in different usage scenarios, and having strong practicality and flexibility.

[0120] The present application also provides a display device 2, such as Fig.10 As shown, it includes any one of the display panels 1 provided in the above embodiments of the present application.

[0121] The display device 2 can be used in vehicles, for example, as a vehicle window, a vehicle sunroof, etc.; it can also be used in display windows, commercial display cabinets, counter communication windows, etc., which are not particularly limited in the present application.

[0122] According to the embodiments of the present application as above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is only limited by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: include: Transparent substrate; A transparent light-emitting layer is disposed on one side of the transparent substrate; a lens function layer, which is located on the same side of the transparent light-emitting layer as the transparent substrate, and comprises a first surface and a second surface, wherein the first surface is located between the second surface and the transparent light-emitting layer, the first surface is parallel to the transparent substrate, and at least a portion of the second surface is inclined relative to the first surface; The first film layer is bonded to the first surface, and the refractive index of the lens functional layer is greater than the refractive index of the first film layer.

2. The display panel according to claim 1, characterized in that: The lens function layer includes a plurality of prism structures, and the second surface includes a prism surface located on a side of the prism structure away from the transparent light-emitting layer; Preferably, light incident from the second surface to the lens functional layer and within a first preset angle range is totally reflected at the first surface; Preferably, the plurality of prism structures include at least one of a right-angle prism, a Porro prism, a corner cube prism, and a Dove prism; Preferably, the transparent light-emitting layer has a light-emitting area and a transparent area, and the orthographic projection of the prism structure on the transparent light-emitting layer is at least partially located in the light-emitting area; Preferably, the orthographic projection of the prism structure on the transparent light-emitting layer is partially located in the light-emitting area, and partially located in the transparent area.

3. The display panel according to claim 1, characterized in that: The lens function layer includes a plurality of convex lens structures, the second surface includes an arc-shaped surface located on a side of the convex lens structure away from the transparent light-emitting layer, and the arc-shaped surface protrudes in a direction away from the transparent light-emitting layer; Preferably, the transparent light-emitting layer has a light-emitting area and a transparent area, and the orthographic projection of the convex lens structure on the transparent light-emitting layer is at least partially located in the light-emitting area; Preferably, the orthographic projection of the convex lens structure on the transparent light-emitting layer is partially located in the light-emitting area, and partially located in the transparent area.

4. The display panel according to claim 1, characterized in that: The transparent substrate is reused as the first film layer, the transparent substrate is bonded to the first surface, and the refractive index of the lens function layer is greater than the refractive index of the transparent substrate; or, The transparent substrate is located on a side of the lens function layer away from the transparent light-emitting layer.

5. A display panel, characterized in that: include: Transparent substrate; A transparent light-emitting layer is disposed on one side of the transparent substrate; The optical waveguide layer and the transparent substrate are arranged on the same side of the transparent light emitting layer.

6. The display panel according to claim 5, characterized in that: The optical waveguide layer comprises a third surface and a fourth surface, wherein the third surface is located between the fourth surface and the transparent light emitting layer; The display panel further comprises a coupling grating disposed in contact with the fourth surface, wherein the coupling grating is used to couple light within a preset angle range into the optical waveguide layer; Preferably, the display panel further comprises an outcoupling grating disposed in contact with the fourth surface and spaced apart from the incoupling grating, the outcoupling grating being used for allowing the light coupled into the optical waveguide layer by the incoupling grating to leave the optical waveguide layer through the outcoupling grating; Preferably, the transparent light-emitting layer has a light-emitting area and a transparent area, and the orthographic projection of the coupling-in grating on the transparent light-emitting layer is located in the light-emitting area; Preferably, the orthographic projection of the outcoupling grating on the transparent light-emitting layer is located within the transparent region.

7. The display panel according to claim 1 or 5, characterized in that: It also includes a light quantity adjustment layer, the light quantity adjustment layer and the transparent substrate are located on the same side of the transparent light emitting layer, the light quantity adjustment layer has a first state and a second state, and the transmittance of the light quantity adjustment layer in the first state is greater than the transmittance of the light quantity adjustment layer in the second state; Preferably, the light intensity adjustment layer is located between the transparent substrate and the transparent light emitting layer; Preferably, the light intensity adjustment layer is located on a side of the transparent substrate away from the transparent light emitting layer.

8. The display panel according to claim 7, characterized in that: The light amount adjustment layer includes a first electrode and a second electrode which are spaced apart, and a liquid crystal layer located between the first electrode and the second electrode; Preferably, the first electrode and the second electrode are arranged at intervals along the thickness direction of the transparent substrate.

9. The display panel according to claim 7, characterized in that: The light quantity adjustment layer includes an electrochromic structure and an electric control structure, and the electric control structure is used to adjust the color of the electrochromic structure; Preferably, the electrochromic structure comprises an electrochromic layer, an electrolyte layer and an ion storage layer stacked along the thickness direction of the transparent substrate; Preferably, the electric control structure comprises a first power supply layer and a second power supply layer, and the first power supply layer and the second power supply layer are arranged on both sides of the electrochromic structure along the thickness direction of the transparent substrate.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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