Display panel and display device

Abstract

The invention provides a display panel and a display device, and relates to the technical field of display, and the display panel comprises a first light-emitting surface and a second light-emitting surface which are oppositely arranged along a first direction; the first dimming component is located on the side, facing the first light-emitting surface, of the light-emitting element, and the array layer is located on the side, facing the second light-emitting surface, of the light-emitting element; the display panel comprises a first dimming state and a second dimming state, in the first dimming state, at least part of light rays emitted by the light-emitting element are emitted to the first light-emitting surface, and at least part of the light rays are emitted to the second light-emitting surface; in the second dimming state, in the first direction, the first dimming component covers the light-emitting element, and at least part of light emitted by the light-emitting element is reflected by the first dimming component and then is emitted to the second light-emitting surface. Therefore, double-sided display is realized, the structure of a display product is simplified, and the production cost is reduced.

Description

Technical Field

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

[0002] With the continuous development of science and technology, more and more display products, such as mobile phones, tablets, laptops and smart wearable devices, are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable tool for people today.

[0003] Traditional display devices can only display on one side, but in real life, the demand for double-sided display is high. To achieve double-sided display, two independent display devices are usually required, which have a complex structure and many assembly materials, resulting in increased production costs. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a display panel and a display device, which aim to achieve double-sided display while simplifying the product structure and reducing production costs.

[0005] In a first aspect, the present disclosure provides a display panel, comprising:

[0006] A first light emitting surface and a second light emitting surface arranged opposite to each other along a first direction;

[0007] An array layer, a light emitting element and a first dimming component, wherein the first dimming component is located on a side of the light emitting element facing the first light emitting surface, and the array layer is located on a side of the light emitting element facing the second light emitting surface;

[0008] The display panel includes a first dimming state and a second dimming state. In the first dimming state, among the light emitted by the light-emitting element, at least part of the light is emitted toward the first light-emitting surface, and at least part of the light is emitted toward the second light-emitting surface; in the second dimming state, along the first direction, the first dimming component covers the light-emitting element, and at least part of the light emitted by the light-emitting element is reflected by the first dimming component and emitted toward the second light-emitting surface.

[0009] In a second aspect, based on the same inventive concept, the present disclosure provides a display device, including the display panel provided in the first aspect of the present disclosure.

[0010] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0011] In the display panel and display device provided by the embodiments of the present disclosure, a first dimming component is introduced on the side of the light-emitting element facing the first light-emitting surface. Through the dimming effect of the first dimming component, the display panel has at least two dimming states, namely a first dimming state and a second dimming state, wherein the first dimming state can be reflected as a double-sided display state. In the first dimming state, at least part of the light emitted by the light-emitting element is emitted toward the first light-emitting surface, and the picture is displayed on the first light-emitting surface, and at least part of the light emitted by the light-emitting element is emitted toward the second light-emitting surface, and the picture is displayed on the second light-emitting surface. The second dimming state can be regarded as a state in which the second light-emitting surface displays the picture but the first light-emitting surface does not display the picture. In the second dimming state, the orthographic projection of the first dimming component on the array layer covers the orthographic projection of the corresponding light-emitting element on the array layer. At this time, the light emitted by the light-emitting element cannot be emitted to the first light-emitting surface due to being blocked by the first dimming component. At least part of the light emitted by the light-emitting element is reflected by the first dimming component and emitted to the second light-emitting surface, and the picture is displayed on the second light-emitting surface. In the embodiment of the present disclosure, by introducing a first dimming component on the side of the light-emitting element facing the first light-emitting surface, the display panel can achieve a double-sided display effect without introducing two sets of independent display panels in the display product, which is beneficial to simplifying the product structure and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 Shown is a schematic plan view of a display panel provided by an embodiment of the present disclosure;

[0015] Figure 2 Shown Figure 1 An AA cross-sectional view of the display panel;

[0016] Figure 3 The figure shows a light path schematic diagram of a display panel provided by an embodiment of the present disclosure in a first dimming state;

[0017] Figure 4 The figure shows a light path schematic diagram of a display panel provided by an embodiment of the present disclosure in a second dimming state;

[0018] Figure 5 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0019] Figure 6 Shown Figure 5 A schematic diagram of a structure of a light emitting element;

[0020] Figure 7 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0021] Figure 8 The figure shows a relative position relationship diagram between the first dimming component and the light emitting element in the second dimming state;

[0022] Fig. 9 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0023] Fig.10 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0024] Fig.11 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0025] Fig.12 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0026] Fig.13 Shown is a display schematic diagram of the front side of the display panel;

[0027] Fig.14 is a double-sided display control flow chart of a display panel provided by an embodiment of the present disclosure;

[0028] Fig.15 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0029] Fig.16 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0030] Fig.17 Shown Fig.15 and Fig.16 A schematic diagram of a structure of a light emitting element;

[0031] Fig.18 Shown Figure 1 Another AA cross-sectional view of the display panel;

[0032] Fig.19is another double-sided display control flow chart of the display panel provided by the embodiment of the present disclosure;

[0033] Fig. 20 Shown is a schematic structural diagram of a display device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0036] For display products with double-sided display, the related art usually adopts a structure in which two display panels are assembled back to back into an integrated structure to achieve double-sided display. The display products with this structure are relatively thick and heavy, and require two sets of display panels, so the cost is relatively high. In order to solve this technical problem, the present disclosure provides a display panel and a display device, which can achieve the function of double-sided display without introducing two sets of display panels, which is conducive to simplifying the overall structure and reducing production costs. The following will be described in conjunction with the accompanying drawings and specific embodiments.

[0037] Figure 1 FIG. 1 is a schematic plan view of a display panel provided by an embodiment of the present disclosure. Figure 2 Shown Figure 1 An AA cross-section of the display panel is shown in Figure 1. Figure 1 and Figure 2 , a display panel provided by an embodiment of the present disclosure includes:

[0038] A first light emitting surface M01 and a second light emitting surface M02 are arranged opposite to each other along a first direction D1; an array layer 10, a light emitting element 20 and a first dimming component 31, wherein the first dimming component 31 is located on a side of the light emitting element 20 facing the first light emitting surface M01, and the array layer 10 is located on a side of the light emitting element 20 facing the second light emitting surface M02; wherein the first light emitting surface M01 and the second light emitting surface M02 can be respectively embodied as two light emitting surfaces of the display panel 100.

[0039] Figure 3 FIG. 1 is a schematic diagram of a light path of a display panel provided by an embodiment of the present disclosure in a first dimming state. Figure 4FIG. 1 is a schematic diagram of an optical path of a display panel provided by an embodiment of the present disclosure in a second dimming state. The display panel 100 includes a first dimming state and a second dimming state. Please refer to FIG. Figure 3 , in the first dimming state, among the light emitted by the light emitting element 20, at least part of the light is emitted toward the first light emitting surface M01, and at least part of the light is emitted toward the second light emitting surface M02; please refer to Figure 4 In the second dimming state, along the first direction D1, the first dimming component 31 covers the light emitting element 20, and at least part of the light emitted by the light emitting element 20 is reflected by the first dimming component 31 and then emitted to the second light emitting surface M02.

[0040] It should be noted that Figure 1 The display panel with a rectangular structure is only taken as an example for description, and the actual shape of the display panel is not limited. In some other embodiments of the present disclosure, the display panel may also be embodied in any other feasible shape such as a circle, a rounded rectangle, etc. Figure 1 The embodiment illustrates the light emitting elements 20 in the display panel, but does not limit the actual number, shape and arrangement of the light emitting elements 20 . Figure 2 In the embodiment, the relative position relationship among the array layer 10, the light emitting element 20 and the first dimming component 31 is only for illustration, and the detailed film structure of the array layer 10 is not shown. For the detailed film structure of the array layer 10, reference may be made to the relevant technology, and the present disclosure does not make any specific limitation on this.

[0041] Optionally, the display panel provided in this embodiment can be a display panel using inorganic light-emitting diode display technology, such as a Micro LED display panel, or a Mini LED display panel, etc., that is, the corresponding light-emitting element 20 in the display panel is a Micro LED or Mini LED. It should also be noted that in order to drive the light-emitting element 20 to emit light, a related driving circuit is also provided on the array layer 10, and reference may be made to the contents of the related art for this, and this disclosure does not specifically limit this.

[0042] In the display panel provided by the embodiment of the present disclosure, the light-emitting element 20 is arranged on the side of the array layer 10 facing the first light-emitting surface M01. The array layer 10 can provide a driving signal to the light-emitting element 20 to drive the light-emitting element 20 to emit light. The second light-emitting surface M02 of the display panel is located on the side of the array layer 10 away from the light-emitting element 20. The first light-emitting surface M01 and the second light-emitting surface M02 of the display panel can be respectively reflected as the front and back of the display panel, and images can be displayed on both the front and back. In particular, the embodiment of the present disclosure introduces a first dimming component 31 on the side of the light-emitting element 20 facing the first light-emitting surface M01. Optionally, the first dimming component 31 is arranged corresponding to the light-emitting element 20 in the display panel, and the first dimming component 31 is arranged on the side of each light-emitting element 20 facing the first light-emitting surface M01. Through the dimming effect of the first dimming component 31, the display panel has at least two dimming states, namely the first dimming state and the second dimming state, wherein the first dimming state can be reflected as a double-sided display state, please refer to Figure 3 In the first dimming state, at least part of the light emitted by the light emitting element 20 is emitted toward the first light emitting surface M01 to display the picture on the first light emitting surface M01, and at least part of the light emitted by the light emitting element 20 is emitted toward the second light emitting surface M02 to display the picture on the second light emitting surface M02. The second dimming state can be regarded as a state in which the second light emitting surface M02 displays the picture while the first light emitting surface M01 does not display the picture. In the second dimming state, the orthographic projection of the first dimming component 31 on the array layer 10 covers the orthographic projection of the corresponding light emitting element 20 on the array layer 10. At this time, the light emitted by the light emitting element 20 cannot be emitted toward the first light emitting surface M01 due to being blocked by the first dimming component 31. At least part of the light emitted by the light emitting element 20 is reflected by the first dimming component 31 and emitted toward the second light emitting surface M02 to display the picture on the second light emitting surface M02. In the embodiment of the present disclosure, by introducing the first dimming component 31 on the side of the light-emitting element 20 facing the first light-emitting surface M01, the display panel can achieve a double-sided display effect without introducing two sets of independent display panels in the display product, which is beneficial to simplifying the product structure and reducing production costs.

[0043] Figure 5 Shown Figure 1 Another AA cross-sectional view of the display panel, in this embodiment, at least part of the film layer of the array layer 10 is refined. Please refer to Figure 5In an optional embodiment of the present disclosure, the array layer 10 includes a plurality of device regions Q1 and a clearance region Q2, the clearance region Q2 at least partially surrounds the device region Q1, and along the first direction D1, the light-emitting element 20 overlaps with the device region Q1; the device region Q1 mentioned in this embodiment is, for example, an opaque region in which devices such as transistors are arranged, and the clearance region Q2 refers to a light-transmitting region in which transistors and metal wiring are not arranged. In the present disclosure, the region corresponding to the array layer 10 directly below the light-emitting element 20 can be regarded as the device region Q1, and the region arranged around the device region Q1, such as the region between adjacent light-emitting elements 20, can be regarded as the clearance region Q2, and the driving circuit connected to the light-emitting element 20 in the array layer 10 is arranged in the device region Q1 below the light-emitting element 20. Optionally, the display panel further includes a light-shielding layer BM arranged on the side of the array layer 10 facing the light-emitting element 20, and the light-shielding layer BM is located in the device region Q1, and does not overlap with the clearance region Q2.

[0044] Figure 6 Shown Figure 5 A schematic diagram of the structure of the light emitting element 20, please refer to Figure 6 , the light emitting element 20 includes a reflective bottom surface m2 and a first light emitting surface m1 which are arranged opposite to each other, and the first light emitting surface m1 is located on the side of the reflective bottom surface m2 facing the first light emitting surface M01 of the display panel; optionally, the light emitting element 20 includes an epitaxial layer 92, an n-type GaN contact layer 93, a quantum well light emitting layer 94 and a p-type GaN contact layer 95, and the two electrodes P1 and P2 of the light emitting element 20 are electrically connected to the n-type GaN contact layer 93 and the p-type GaN contact layer 95 respectively. When the light emitting layer of the light emitting element 20 in this embodiment emits light, light can be emitted through the upper surface of the light emitting element 20 (the surface facing away from the array layer 10, i.e., the first light emitting surface m1), and the lower surface (the surface facing the array layer 10, i.e., the reflective bottom surface m2) is a reflective surface and does not emit light. When the light emitted by the light emitting layer is emitted toward the reflective bottom surface m2, it is further emitted from the first light emitting surface m1 after being reflected by the emission bottom surface.

[0045] Please combine Figure 5 and Figure 6When the light emitting element 20 is a structure that emits light on the upper surface and does not emit light on the lower surface, the embodiment of the present disclosure introduces a clearance area Q2 in the array layer 10. In the first dimming state, among the light emitted by the first light emitting surface m1 of the light emitting element 20, at least part of the light is emitted toward the first light emitting surface M01, and at least part of the light is reflected by the first dimming component 31 and emitted from the clearance area Q2 to the second light emitting surface M02. In this way, when double-sided display is required, among the light emitted by the light emitting element 20, part of the light can be emitted toward the first light emitting surface M01, and part of the light can be reflected by the first dimming component 31 and emitted from the clearance area Q2 to the second light emitting surface M02. The effect of double-sided display is achieved by using a group of light emitting elements 20 and the first dimming component 31 in cooperation, which is conducive to simplifying the panel structure, without introducing too many light emitting elements 20 and driving circuits, and is also conducive to reducing the cost of display products.

[0046] Figure 7 Shown Figure 1 Another AA cross-sectional view of the display panel, corresponding to the second dimming state of the display panel. Figure 7 In an optional embodiment of the present disclosure, in the second dimming state, the light emitted from the first light emitting surface m1 of the light emitting element 20 is reflected by the first dimming component 31 and then emitted from the clearance area Q2 to the second light emitting surface M02.

[0047] The structure of the array layer 10 and the structure of the light emitting element 20 on the display panel of this embodiment are similar to those of Figure 5 The same as the embodiment shown, the corresponding light emitting element 20 has a structure in which light is emitted from the upper surface and not from the lower surface, and the array layer 10 includes a device region Q1 and a clearance region Q2. Figure 5 The difference between the shown embodiments is that Figure 7 In the illustrated embodiment, the positions of the first dimming component 31 are different, so that the dimming states of the display panel are different. Figure 7 The embodiment corresponds to the second dimming state. At this time, only the second light emitting surface M02 of the display panel emits light, while the first light emitting surface M01 does not emit light. The orthographic projection of the first dimming component 31 on the array layer 10 covers the orthographic projection of the light emitting element 20 on the array layer 10. The light emitted from the first light emitting surface m1 of the light emitting element 20 cannot continue to be emitted to the first light emitting surface M01 of the display panel due to being blocked by the first dimming component 31. At least part of this part of the light is reflected by the first dimming component 31 and then emitted from the clearance area Q2 to the second light emitting surface M02 of the display panel, so that the second light emitting surface M02 performs the display function. The second light emitting surface M02 is located on the side of the array layer 10 in the display panel away from the light emitting element 20, which can be regarded as a back display at this time.

[0048] Please continue to refer to Figure 7In an optional embodiment of the present disclosure, in the second dimming state, the edge of the projection of the light emitting element 20 on the plane where the array layer 10 is located is located inside the edge of the projection of the first dimming component 31 on the plane where the array layer 10 is located. That is to say, in the second dimming state, the edge of the orthographic projection of the first dimming component 31 on the array layer 10 exceeds the edge of the orthographic projection of the corresponding light emitting element 20 on the array layer 10. In the second dimming state, only the second light emitting surface M02 of the display panel performs the display function, while the first light emitting surface M01 does not display. At this time, it is not expected that light will be emitted to the first light emitting surface M01. Therefore, in the embodiment of the present disclosure, in the second dimming state, the area of ​​the orthographic projection of the first dimming component 31 on the array layer 10 is larger than the area of ​​the orthographic projection of the corresponding light-emitting element 20 on the array layer 10, so that the first dimming component 31 fully covers the corresponding light-emitting element 20 while the edge can exceed the light-emitting element 20 by a certain size. In this way, even the light with a wide viewing angle among the light emitted by the light-emitting element 20 will be blocked by the first dimming component 31, thereby preventing light from being emitted to the first light emitting surface M01 in the second dimming state, which is conducive to realizing the correct display function of the display panel in the second dimming state.

[0049] Figure 8 FIG. 2 is a diagram showing a relative position relationship between the first dimming component 31 and the light emitting element 20 in the second dimming state. Figure 8 In an optional embodiment of the present disclosure, in the second dimming state, in the first cross section, the angle between the line L connecting the edge of the first dimming component 31 and the edge of the light-emitting element 20 and the plane where the array layer 10 is located is α, α≤50°; the first cross section is perpendicular to the plane where the array layer 10 is located and passes through the first dimming component 31 and the light-emitting element 20.

[0050] This embodiment further illustrates the situation where the edge of the first dimming component 31 exceeds the edge of the corresponding light-emitting element 20 in the second dimming state. In the second dimming state, the first dimming component 31 can be rotated to a horizontal state to cover the light-emitting element 20. The angle α between the line L between the edge of the first dimming component 31 and the edge of the light-emitting element 20 and the horizontal direction is ≤50°, which is equivalent to the supplementary angle of 40° of the total reflection critical angle of the packaging glue and the air interface corresponding to the light-emitting element 20. The acute angle of the angle between the wide-angle light emitted by the first light-emitting surface m1 of the light-emitting element 20 and the horizontal direction is generally greater than 50 degrees. Therefore, in this embodiment, when the angle α between the line L between the edge of the first dimming component 31 and the edge of the light-emitting element 20 and the horizontal direction is set to be less than or equal to 50°, the wide-angle light emitted by the light-emitting element 20 will also be blocked by the first dimming component 31, and this part of the light will not be emitted to the first light-emitting surface M01 of the display panel, avoiding the problem of light leakage to the first light-emitting surface M01 in the second dimming state, thereby helping to improve the display effect of the display panel in the second dimming state.

[0051] Please note that, please refer to Figure 7 and Figure 8 In the second dimming state, the first dimming component 31 rotates to 0°, and the dimming surface of the first dimming component 31 can be parallel or nearly parallel to the plane where the array layer 10 is located. At this time, the center of the first dimming component 31 and the center of the light-emitting element 20 can overlap in their orthographic projections on the array layer 10, thereby preventing the light of all directions with a wide viewing angle emitted by the light-emitting element 20 from being blocked by the first dimming component 31. Of course, while ensuring that the light of all directions with a wide viewing angle emitted by the light-emitting element 20 can be blocked by the first dimming component 31, the orthographic projections of the center of the first dimming component 31 and the center of the light-emitting element 20 on the array layer 10 may not overlap, and the present disclosure does not specifically limit this.

[0052] Fig. 9 Shown Figure 1 Another AA cross-sectional view of the display panel, corresponding to the third dimming state of the display panel. Please refer to Fig. 9 In an optional implementation of the present disclosure, the display panel further includes a third dimming state. In the third dimming state, the light emitted by the light emitting element 20 is emitted toward the first light emitting surface M01.

[0053] Fig. 9 In the embodiment shown, the structures of the array layer 10 and the light emitting element 20 are similar to Figure 5The structures of the embodiments shown are the same, the light-emitting element 20 is a structure that emits light on the upper surface and does not emit light on the lower surface, and a clearance area Q2 for light transmission is introduced in the array layer 10. The third dimming state can be regarded as a state in which the first light-emitting surface M01 of the display panel emits light to display the picture, while the second light-emitting surface M02 does not display. In the third dimming state, the first dimming component 31 is rotated to 90°, for example, a state perpendicular or nearly perpendicular to the plane where the array layer 10 is located, and the light emitted by the first light-emitting surface of the light-emitting element 20 will not or basically will not be reflected by the first dimming component 31, but will be emitted to the first light-emitting surface M01 of the display panel, realizing the picture display function of the first light-emitting surface M01. The first light-emitting surface M01 is the surface of the light-emitting element 20 facing away from the array layer 10, and can be regarded as the front of the display panel.

[0054] Please continue to refer to Fig. 9 In an optional embodiment of the present disclosure, the dimming surface of the first dimming component 31 is a plane, and in the third dimming state, the dimming surface is perpendicular to the array layer 10; or, please refer to Fig.10 , Fig.10 Shown Figure 1 In another AA cross-sectional view of the display panel, the dimming surface of the first dimming component 31 is a curved surface. In the third dimming state, the tangent plane passing through the vertex of the curved surface is perpendicular to the array layer 10.

[0055] In the first dimming component 31 provided in the embodiment of the present disclosure, the dimming surface is a reflective surface, and the dimming surface can be a flat structure or a curved structure. When the dimming surface is a flat structure, the structure of the first dimming component 31 is relatively simple and convenient to manufacture. When the dimming surface of the first dimming component 31 is curved, the curved surface has a certain gathering effect on the light. In the first dimming state of the display panel, for example, please refer to Fig.11 The arc surface of the first dimming component 31 can reflect more light to the second light emitting surface M02, thereby increasing the amount of light and display brightness of the second light emitting surface M02, and improving the effective utilization of light. In the second dimming state of the display panel, for example, please refer to Fig.12 The arc surface of the first dimming component 31 can also effectively block the light of a large viewing angle emitted by the light emitting element 20, and due to the existence of the arc surface, when the projection area is the same, the first dimming component 31 with an arc structure will block a larger range of light emitted by the light emitting element 20, which is more conducive to avoiding the problem of light leakage on the first light emitting surface M01 of the display panel in the second dimming state. Fig.11 and Fig.12 They are Figure 1 Another AA cross-sectional view of the display panel is shown in FIG.

[0056] It should be noted that in the display panel, the structures of the first dimming components 31 corresponding to different light-emitting elements 20 can be set to be the same. For example, the dimming surfaces of the first dimming components 31 corresponding to different light-emitting elements 20 are all planar structures, or the dimming surfaces of the first dimming components 31 corresponding to different light-emitting elements 20 are all curved structures with the same curvature. In this way, the same standard can be used to manufacture different first dimming components 31 in the display panel, which is conducive to simplifying the structure of the display panel and simplifying the overall manufacturing process of the display panel.

[0057] In an optional embodiment of the present disclosure, different light emitting elements 20 correspond to different first dimming components 31, and at the same display moment, the dimming states of different first dimming components 31 are the same. For example, at a certain display moment, for example, please refer to Fig.11 , different first dimming components 31 corresponding to different light-emitting elements 20 are all tilted, at this time, part of the light emitted by the light-emitting element 20 can be emitted to the first light-emitting surface M01, and part of the light is reflected by the first dimming component 31 and emitted to the second light-emitting surface M02, and the display panel is reflected on both sides. Or, at a certain display moment, for example, please refer to Fig.12 , the first dimming components 31 corresponding to different light-emitting elements 20 all cover the corresponding light-emitting elements 20, and the light emitted by the light-emitting element 20 is reflected by the first dimming component 31 and then emitted to the second light-emitting surface M02, and the display panel is reflected as the back side. Or, at a certain display moment, for example, please refer to Fig. 9 or Fig.10 , the first dimming components 31 corresponding to different light-emitting elements 20 rotate to 90 degrees, the dimming surface is perpendicular to or equivalently perpendicular to the plane where the array layer 10 is located, and the light emitted by the light-emitting element 20 is emitted to the first light-emitting surface M01 of the display panel, and the display panel is reflected as front light emission. When the dimming states corresponding to different first dimming components 31 are the same at the same display moment, it can be regarded that the rotation of the dimming surfaces of different first dimming components 31 relative to the surface where the array layer 10 is located is the same or similar. At this time, the state of the first dimming components 31 in the display panel can be uniformly controlled, which is conducive to simplifying the overall control strategy of the display panel.

[0058] Please refer to Figure 5In an optional embodiment of the present disclosure, in the first dimming state, the dimming surfaces of different first dimming components 31 have the same orientation. Different light-emitting elements 20 in the embodiment of the present disclosure correspond to different first dimming components 31. When the dimming surface of the first dimming component 31 is a plane, in the first dimming state, the first dimming component 31 is tilted relative to the plane where the array layer 10 is located, and the dimming surfaces of different first dimming components have the same orientation. It can be understood that when the dimming surface of the first dimming component 31 is adjusted from a state parallel to the plane where the array layer 10 is located to a state intersecting and not perpendicular to the plane where the array layer 10 is located, the dimming surfaces of the first dimming component 31 are all rotated in a clockwise direction, or are all rotated in a counterclockwise direction. In this way, the dimming surfaces of different first dimming components 31 are all facing the same edge of the display panel. This method is conducive to simplifying the control strategy of the first dimming component 31, and is conducive to ensuring the light mixing consistency of the light emitted by the light-emitting elements 20 of different colors, thereby improving the display effect of the display panel.

[0059] It should be noted that, in the first dimming state, for the first dimming components 31 corresponding to different light-emitting elements 20, the angles between their dimming surfaces and the plane where the array layer 10 is located may be different, that is, the amount of light reflected by the first dimming component 31 may be different. The angles between the dimming surfaces of different first dimming components 31 and the plane where the array layer 10 is located may be adjusted according to actual needs, so as to meet different requirements for display grayscale and brightness of the first light-emitting surface M01 and the second light-emitting surface M02.

[0060] In some other embodiments of the present disclosure, the positions of the first dimming components 31 in different areas of the display panel can also be controlled separately, so that different areas of the display panel are displayed in different dimming states. For example, assuming that the display panel is divided into two display areas, the positions of the first dimming components 31 in different display areas can be controlled separately to make one display area display on both sides (the dimming surface of the corresponding first dimming component 31 is tilted relative to the plane where the array layer 10 is located), and the other display area displays on the front side (the dimming surface of the corresponding first dimming component 31 is perpendicular to the plane where the array layer 10 is located) or displays on the back side (the dimming surface of the corresponding first dimming component 31 is parallel to the surface where the array layer 10 is located), or one display area displays on the front side and the other display area displays on the back side, etc. At this time, the first dimming components 31 located in the same display area can be controlled uniformly.

[0061] In some other embodiments of the present disclosure, the display panel can be divided into three display areas according to needs, and the positions of the first dimming components 31 in different display areas can be controlled to make different display areas correspond to different dimming states, for example, one display area can be double-sided display, another display area can be front-side display, and another display area can be back-side display, etc. The present disclosure does not specifically limit this. In this case, the first dimming components 31 in different display areas can be controlled separately, and the first dimming components 31 in the same display area can be controlled uniformly.

[0062] Optionally, the first dimming component 31 provided in the embodiment of the present disclosure is an adjustable angle micromirror MEMS device. The adjustable angle micromirror MEMS device has a reflective surface, that is, the dimming surface mentioned in the above embodiment, and can realize the change of multiple angles or different orientations of the dimming surface according to different driving voltages, thereby realizing different dimming states. For example, when the dimming surface is controlled to be at an acute angle with the plane where the array layer 10 is located, and the orthographic projection of the dimming surface on the plane where the array layer 10 is located does not overlap with the orthographic projection of the corresponding light-emitting element 20 on the array layer 10 at least partially, it corresponds to the first dimming state of the display panel; when the dimming surface is controlled to be parallel to the plane where the array layer 10 is located, it corresponds to the second dimming state of the display panel; when the dimming surface is controlled to be perpendicular to the plane where the array layer 10 is located, it corresponds to the third dimming state of the display panel. Optionally, before forming the adjustable angle micromirror MEMS device, a support structure can be pre-formed using photoresist so that the adjustable angle micromirror MEMS device is placed on the support structure.

[0063] When a MEMS device is introduced in the display panel as the first dimming component 31, in practical applications, the MEMS device can be combined with an algorithm to control the rotation of the MEMS structure. In double-sided display, the front brightness and the back brightness can be adjusted, which is also helpful in solving the problem of front and back mirror display in double-sided display. Fig.13The figure shows a display schematic diagram of the front side of the display panel. In the first dimming state, it is assumed that the first light emitting surface M01 and the second light emitting surface M02 both display the picture "positive". It is assumed that the word "positive" on the front and back sides are both white characters on a red background. The a position and the a' position are two mirror-symmetrical positions. When displaying on both sides, the display images of the a position and the a' position in the back image are interchanged. The grayscale marked in the figure is the grayscale corresponding to the front side display only. When displaying on both sides, for the a position, the front side needs to display red and the back side needs to display white. At this time, the amount of red light allocated to the red light emitting element 20, the green light emitting element 20 and the blue light emitting element 20 at the a position on the front side can be twice the amount of green light and twice the amount of blue light, so that the a position on the front side emits red light. At the same time, at position a, 50% of the red light, 100% of the green light and 100% of the blue light are reflected to the back of the display panel through the rotation of the MEMS device structure, so that the back side emits white light, so that the front and back sides can display the "positive" picture normally without any mirroring problems. Therefore, the display requirements of the first light-emitting surface M01 and the second light-emitting surface M02 of the display panel can be met by adjusting the amount of light through the first dimming component 31.

[0064] Fig.14 is a double-sided display control flow chart of a display panel provided in an embodiment of the present disclosure, and the double-sided display control method includes:

[0065] S01, input display picture information;

[0066] S02, converting the displayed image information into mirrored image information, including front image information and back image information;

[0067] S03, superimposing the brightness of the front image information and the back image information;

[0068] S04, driving the display panel to display the image after brightness superposition;

[0069] S05, using an algorithm to calculate the ratio of the front display brightness to the back display brightness of each light-emitting element;

[0070] S06, using an algorithm to control the rotation angle of the first dimming component according to the brightness ratio;

[0071] S07. Realize double-sided display of the display panel.

[0072] Considering that the packaging structure of the light-emitting element will cause a certain brightness loss to the light-emitting element, in the above step S05, when calculating the front display brightness and the back display brightness of the light-emitting element, the calculation can be performed on the basis of taking into account the brightness loss of the light-emitting element, so as to make the display of the display panel more accurate. Optionally, the brightness test data of the light-emitting element before and after packaging can be collected to obtain the brightness loss data.

[0073] Fig.15 and Fig.16 They are shown as Figure 1 Another AA cross-sectional view of the display panel, Fig.17 Shown Fig.15 and Fig.16 A schematic diagram of the structure of the light emitting element 20, wherein: Fig.15 Corresponding to the first dimming state of the display panel, Fig.16 Corresponding to the second dimming state of the display panel. Please refer to Figures 15 to 17 In an optional embodiment of the present disclosure, the light emitting element 20 includes a first light emitting surface m1 and a second light emitting surface m3 arranged opposite to each other along a first direction D1, and the first light emitting surface m1 is located between the second light emitting surface m3 and the first light emitting surface M01 of the display panel; optionally, the light emitting element 20 includes an epitaxial layer 92, an n-type GaN contact layer 93, a quantum well light emitting layer 94, and a p-type GaN contact layer 95, and the two electrodes P1 and P2 of the light emitting element 20 are electrically connected to the n-type GaN contact layer 93 and the p-type GaN contact layer 95, respectively. The light emitting element 20 in this embodiment is not provided with a reflective layer, and both its upper and lower surfaces can emit light, and the light emitted by the light emitting layer can be emitted through the first light emitting surface m1, and can also be emitted through the second light emitting surface m3.

[0074] Please continue to refer to Figures 15 to 17 When the light-emitting element 20 in the display panel is a light-emitting element 20 that can emit light on both the upper surface and the lower surface, the display panel also includes a second dimming component 32 arranged corresponding to the light-emitting element 20, and the second dimming component 32 is located on the side of the light-emitting element 20 facing the second light-emitting surface M02 of the display panel; in the first dimming state and the second dimming state, along the first direction D1, the second dimming component 32 does not overlap with the light-emitting element 20, and the light emitted from the second light-emitting surface m3 is emitted toward the second light-emitting surface M02.

[0075] It should be noted that, when the light-emitting element 20 in the display panel is a light-emitting element 20 that can emit light on both the upper surface and the lower surface, the transistor and other structures connected to the light-emitting element in the array layer 10 are not located directly below the light-emitting element 20, and the transistor and other structures can be set in the area between adjacent light-emitting elements, such as the area below the shading layer BM, wherein the shading layer BM is located between adjacent light-emitting elements 10, and no circuit or wiring structure is set in the area directly below the light-emitting element 10 to facilitate light emission from the back side of the light-emitting element 10.

[0076] Please refer to Fig.15 and Fig.17 In the first dimming state, both the first light emitting surface M01 and the second light emitting surface M02 of the display panel display the picture, and at least part of the light emitted from the first light emitting surface m1 of the light emitting element 20 will be directed toward the light emitting surface of the display panel. At this time, the dimming surface of the first dimming component 31 intersects with the plane where the array layer 10 is located, and the angle between the dimming surface and the array layer 10 can be a right angle or an acute angle greater than 0 degrees to ensure that the light emitted from the first light emitting surface can be directed toward the first light emitting surface M01; in the first dimming state, along the first direction D1, the second dimming component 32 does not overlap with the light emitting element 20, that is, the second dimming component 32 will expose the second light emitting surface m3 of the light emitting element 20, so that the light emitted from the second light emitting surface m3 will be able to be directed toward the second light emitting surface M02, thereby achieving a double-sided display effect of the display panel.

[0077] Please refer to Fig.16 and Fig.17 In the second dimming state, only the second light emitting surface M02 of the display panel displays the picture, and the first light emitting surface M01 does not display the picture. At this time, along the first direction D1, the first dimming component 31 covers the corresponding light emitting element 20, and the light emitted by the light emitting element 20 will be blocked by the first dimming component 31 and cannot be emitted from the first light emitting surface M01. Along the first direction D1, the second dimming component 32 does not overlap with the corresponding light emitting element 20, that is, the second dimming component 32 exposes the second light emitting surface m3 of the light emitting element 20. In this way, the light emitted through the second light emitting surface m3 will be able to be emitted to the second light emitting surface M02 of the display panel, so that the second surface of the display panel can play the picture display function. In this embodiment, the light reflected by the first dimming component 31 can also be further emitted to the second light emitting surface M02 through the lower surface of the light emitting element 20.

[0078] It should be noted that when both the front and back sides of the light emitting element 20 can emit light, there is no need to set a clearance area Q2 in the array substrate, and the area between the light emitting elements 20 on the array layer 10 can be shielded by the light shielding layer.

[0079] Fig.18 Shown Figure 1Another AA cross-sectional view of the display panel, corresponding to the third dimming state of the display panel, please refer to Fig.17 and Fig.18 In an optional embodiment of the present disclosure, the display panel further includes a third dimming state. In the third dimming state, along the first direction D1, the second dimming component 32 covers the light emitting element 20, at least part of the light emitted by the second light emitting surface m3 is reflected by the second dimming component 32 and then emitted to the first light emitting surface M01, and at least part of the light emitted by the first light emitting surface m1 is emitted to the first light emitting surface M01. Optionally, in the third dimming state, the orthographic projection of the second dimming component 32 on the plane where the array layer 10 is located covers the orthographic projection of the light emitting element 20 on the plane where the array layer 10 is located.

[0080] In the display panel of the present embodiment, the light emitting element 20 is a structure that can emit light from both the front and back sides. At this time, the first dimming component 31 is introduced on the side of the light emitting element 20 facing the first light emitting surface M01, and the second dimming component 32 is introduced on the side of the light emitting element 20 facing the second light emitting surface M02. The surface of the second dimming component 32 facing the light emitting element 20 is a reflective surface. In the third dimming state, the second dimming component 32 is located directly below the corresponding light emitting element 20, shielding the second light emitting surface M02 of the light emitting element 20. At this time, the second dimming component 32 can serve as the bottom reflective layer of the light emitting element 20, and at least part of the light emitted by the light emitting layer is emitted toward the first light emitting surface M01 of the display panel through the first light emitting surface m1, and at least part of the light emitted by the light emitting layer is emitted toward the second dimming component 32 through the second light emitting surface m3, and after being reflected by the second dimming component 32, it is emitted toward the first light emitting surface M01 of the display panel through the light emitting element 20, thereby realizing the forward display function of the display panel.

[0081] In an optional embodiment of the present disclosure, the first dimming component 31 and the second dimming component 32 are position-adjustable MEMS galvanometers, which have a reflective surface and can be used as the dimming surface of the first dimming component 31 and the second dimming component 32 .

[0082] When the light-emitting element 20 is a structure that can emit light from both the front and back sides, the position of the second dimming component 32 introduced in the display panel is adjustable, which can be specifically reflected in that the second dimming component 32 can be translated relative to the corresponding light-emitting element 20. For example, in the first dimming state and the second dimming state, the second dimming component 32 can be translated to an area outside the light-emitting element 20, for example, translated between adjacent light-emitting elements 20, so that the second dimming component 32 does not overlap with the light-emitting element 20 along the first direction D1, and the second dimming component 32 exposes the second light-emitting surface m3 of the light-emitting element 20. In the third dimming state, the second dimming component 32 can be translated to directly below the corresponding light-emitting element 20 to act as a reflective layer. It should be noted that the present disclosure does not limit the specific film layer of the second dimming component 32, as long as the second dimming component 32 can be controlled to translate relative to the light-emitting element 20 in different dimming states.

[0083] In the embodiment of the present disclosure, when the first dimming component 31 is introduced on the side of the light-emitting element 20 facing the first light-emitting surface M01, the position of the first dimming component 31 can be adjusted, which can be reflected in that the first dimming component 31 can be rotated relative to the plane where the array layer 10 is located. For example, in the first dimming state, the dimming surface of the first dimming component 31 can intersect with the plane where the array layer 10 is located but not perpendicular; in the second dimming state, the dimming surface of the first dimming component 31 can be parallel to the plane where the array layer 10 is located; in the third dimming state, the dimming surface of the first dimming component 31 can be perpendicular to the plane where the array layer 10 is located.

[0084] Fig.19 is another double-sided display control flow chart of the display panel provided in the embodiment of the present disclosure, corresponding to Fig.15 The panel structure shown in the figure, the double-sided display control method includes:

[0085] S11, input display picture information;

[0086] S12, converting the displayed image information into mirrored image information, including front image information and back image information;

[0087] S13, superimposing the brightness of the front image information and the back image information;

[0088] S14, driving the display panel to display the image after brightness superposition;

[0089] S15, using an algorithm to calculate the ratio of the front display brightness to the back display brightness of each light-emitting element;

[0090] S16, using an algorithm to control the rotation angle of the first dimming component and the position of the second dimming component according to the brightness ratio;

[0091] S17, realizing double-sided display of the display panel.

[0092] Considering that the packaging structure of the light-emitting element will cause a certain brightness loss to the light-emitting element, in the above step S15, when calculating the front display brightness and the back display brightness of the light-emitting element, the calculation can be performed on the basis of taking into account the brightness loss of the light-emitting element, so as to make the display of the display panel more accurate. Optionally, the brightness test data of the light-emitting element before and after packaging can be collected to obtain the brightness loss data.

[0093] Based on the same inventive concept, the present disclosure also provides a display device, Fig. 20 FIG. 1 is a schematic diagram of a structure of a display device provided in an embodiment of the present disclosure. Please refer to FIG. Fig. 20 , the display device 200 includes the display panel 100 in any of the above embodiments. The display device 200 provided in the embodiment of the present disclosure may be any electronic device with a display function, such as a tablet computer with a display function, a display cabinet display product, a television, or a vehicle-mounted display device. The display device 200 provided in the embodiment of the present disclosure has the beneficial effects of the display panel 100 provided in the embodiment of the present disclosure. For details, please refer to the specific description of the display panel 100 in the above embodiments, which will not be repeated in this embodiment.

[0094] Understandably, Fig. 20 The display device is only illustrated in a rectangular structure. In some other embodiments of the present disclosure, the display device 200 may also be circular, elliptical or any other feasible shape, and the present disclosure does not specifically limit this.

[0095] In summary, the display panel and display device provided by the embodiments of the present disclosure have at least the following technical effects:

[0096] In the display panel and the display device provided by the embodiments of the present disclosure, a first dimming component is introduced on the side of the light-emitting element 20 facing the first light-emitting surface M01. Through the dimming effect of the first dimming component, the display panel has at least two dimming states, namely a first dimming state and a second dimming state. The first dimming state can be reflected as a double-sided display state. In the first dimming state, at least part of the light emitted by the light-emitting element 20 is emitted toward the first light-emitting surface M01, and the picture is displayed on the first light-emitting surface M01, and at least part of the light emitted by the light-emitting element 20 is emitted toward the second light-emitting surface M02, and the picture is displayed on the second light-emitting surface M02. The second dimming state can be regarded as a state in which the second light emitting surface M02 displays the image while the first light emitting surface M01 does not display the image. In the second dimming state, the orthographic projection of the first dimming component on the array layer 10 covers the orthographic projection of the corresponding light emitting element 20 on the array layer 10. At this time, the light emitted by the light emitting element 20 cannot be emitted to the first light emitting surface M01 due to being blocked by the first dimming component. At least part of the light emitted by the light emitting element 20 is reflected by the first dimming component and emitted to the second light emitting surface M02, and the image is displayed on the second light emitting surface M02. In the embodiment of the present disclosure, by introducing the first dimming component on the side of the light emitting element 20 facing the first light emitting surface M01, the display panel can achieve a double-sided display effect, without introducing two sets of independent display panels in the display product, which is conducive to simplifying the product structure and reducing production costs.

[0097] It should be noted that, in this article, relational terms such as "first" and "second" 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 sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0098] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: include: A first light emitting surface and a second light emitting surface arranged opposite to each other along a first direction; An array layer, a light emitting element and a first dimming component, wherein the first dimming component is located on a side of the light emitting element facing the first light emitting surface, and the array layer is located on a side of the light emitting element facing the second light emitting surface; The display panel includes a first dimming state and a second dimming state. In the first dimming state, at least part of the light emitted by the light emitting element is emitted toward the first light emitting surface, and at least part of the light is emitted toward the second light emitting surface; In the second dimming state, along the first direction, the first dimming component covers the light emitting element, and at least part of the light emitted by the light emitting element is reflected by the first dimming component and then emitted to the second light emitting surface.

2. The display panel according to claim 1, characterized in that: The array layer comprises a plurality of device regions and clearance regions, wherein the clearance regions at least partially surround the device regions, and along the first direction, the light emitting elements overlap with the device regions; The light emitting element comprises a reflective bottom surface and a first light emitting surface which are arranged opposite to each other, wherein the first light emitting surface is located on a side of the reflective bottom surface facing the first light emitting surface of the display panel; In the first dimming state, among the light emitted by the first light-emitting surface of the light-emitting element, at least part of the light is emitted toward the first light-emitting surface, and at least part of the light is emitted from the clearance area toward the second light-emitting surface after being reflected by the first dimming component.

3. The display panel according to claim 2, characterized in that: In the second dimming state, the light emitted from the first light emitting surface of the light emitting element is reflected by the first dimming component and then emitted from the clearance area to the second light emitting surface.

4. The display panel according to claim 1, characterized in that: In the second dimming state, the edge of the projection of the light emitting element on the plane where the array layer is located is located inside the edge of the projection of the first dimming component on the plane where the array layer is located.

5. The display panel according to claim 4, characterized in that: In the second dimming state, in the first cross section, the angle between the line connecting the edge of the first dimming component and the edge of the light-emitting element and the plane where the array layer is located is α, α≤50°; the first cross section is perpendicular to the plane where the array layer is located and passes through the first dimming component and the light-emitting element.

6. The display panel according to claim 1, characterized in that: The display panel further includes a third dimming state. In the third dimming state, the light emitted by the light emitting element is emitted toward the first light emitting surface.

7. The display panel according to claim 6, characterized in that: The dimming surface of the first dimming component is a plane, and in the third dimming state, the dimming surface is perpendicular to the array layer; or, the dimming surface of the first dimming component is a curved surface, and in the third dimming state, a tangent plane passing through the vertex of the curved surface is perpendicular to the array layer.

8. The display panel according to claim 1, characterized in that: Different light-emitting elements correspond to different first dimming components respectively, and at the same display moment, the dimming states of different first dimming components are the same.

9. The display panel according to claim 8, characterized in that: In the first dimming state, the dimming surfaces of different first dimming components are oriented in the same direction.

10. The display panel according to claim 1, characterized in that: The light emitting element comprises a first light emitting surface and a second light emitting surface arranged opposite to each other along the first direction, wherein the first light emitting surface is located between the second light emitting surface and the first light emitting surface of the display panel; The display panel further includes a second dimming component arranged corresponding to the light emitting element, and the second dimming component is located on a side of the light emitting element facing the second light emitting surface of the display panel; In the first dimming state and the second dimming state, along the first direction, the second dimming component and the light emitting element do not overlap, and the light emitted by the second light emitting surface is emitted toward the second light emitting surface.

11. The display panel according to claim 10, characterized in that: The display panel also includes a third dimming state. In the third dimming state, along the first direction, the second dimming component covers the light-emitting element, at least part of the light emitted by the second light-emitting surface is reflected by the second dimming component and then emitted toward the first light-emitting surface, and at least part of the light emitted by the first light-emitting surface is emitted toward the first light-emitting surface.

12. The display panel according to claim 11, characterized in that: The first dimming component and the second dimming component are position-adjustable MEMS galvanometer mirrors.

13. A display device, characterized in that: The display panel comprises any one of claims 1 to 12.

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