Display panel and display device

Abstract

The invention discloses a display panel and a display device.The display panel comprises a substrate, a light-emitting layer and an adjusting part, and the light-emitting layer is arranged on one side of the substrate and comprises a plurality of light-emitting elements; the adjusting part is arranged between every two adjacent light-emitting elements, and the adjusting parts are configured in the mode that when the light-emitting elements emit light, the transparency of the adjusting parts is smaller than a transparency threshold value, and when the light-emitting elements do not emit light, the transparency of the adjusting parts is larger than or equal to the transparency threshold value. According to the scheme, when the light-emitting elements emit light, the transparency of the adjusting piece is smaller than the transparency threshold value, and the problem of light crosstalk between the adjacent light-emitting elements is solved; when the light-emitting element does not emit light, the transparency of the adjusting piece is larger than or equal to the transparency threshold value, the light transmittance of the display panel is improved, and the transparent display effect of the display panel is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] In current encapsulation display technologies, organic materials are generally used to perform side encapsulation on the transferred light-emitting diodes (LEDs) to improve the reliability of the LEDs, prevent color crosstalk between adjacent LEDs, and increase the light-emitting brightness of the LEDs. The organic materials are generally black organic materials, i.e., a black matrix (BM). When avoiding light crosstalk between adjacent pixels, the transmittance of the display panel is also reduced.

[0003] Therefore, in order to improve the light transmittance and the transparent display effect of the display panel, it is urgent to improve the display panel. Summary of the Invention

[0004] The present application mainly provides a display panel and a display device, which improve the light transmittance of the display panel and ensure the transparent display effect of the display panel.

[0005] To solve the above technical problems, the technical solution adopted by the present application is: providing a display panel, including a substrate, a light-emitting layer, and an adjusting member. The light-emitting layer is disposed on one side of the substrate and includes a plurality of light-emitting elements. The adjusting member is disposed between two adjacent light-emitting elements. The adjusting member is configured to: when the light-emitting element emits light, the transparency of the adjusting member is less than a transparency threshold; when the light-emitting element does not emit light, the transparency of the adjusting member is greater than or equal to the transparency threshold.

[0006] The adjusting member includes an electrochromic layer, a first electrode, and a second electrode for applying a voltage to the electrochromic layer. When the light-emitting element emits light, the first electrode and the second electrode are applied with a voltage to make the transparency of the electrochromic layer less than the transparency threshold. When the light-emitting element does not emit light, the first electrode and the second electrode are not applied with a voltage to make the transparency of the electrochromic layer greater than or equal to the transparency threshold.

[0007] The material of the electrochromic layer includes polymer dispersed liquid crystal. When the light-emitting element emits light, the polymer dispersed liquid crystal is in a scattering state. When the light-emitting element does not emit light, the polymer dispersed liquid crystal is in an orderly arranged state.

[0008] The number of the adjusting members is multiple, and at least one light-emitting element is disposed between two adjacent adjusting members. The first electrodes of two adjacent adjusting members are electrically connected, and / or the second electrodes of two adjacent adjusting members are electrically connected.

[0009] Among them, the first electrode is at least disposed between the electrochromic layer and the substrate, and the second electrode is disposed on the side of the electrochromic layer facing away from the substrate.

[0010] Preferably, the first electrode extends to the side of the light-emitting element facing away from the substrate, and the first electrodes between two adjacent adjusting members are continuous without interruption, and / or, the second electrode extends to the side of the light-emitting element facing away from the substrate, and the second electrodes between two adjacent adjusting members are continuous without interruption; or, the orthographic projection of the first electrode on the substrate is located between the orthographic projections of two adjacent light-emitting elements on the substrate, and / or, the orthographic projection of the second electrode on the substrate is located between the orthographic projections of two adjacent light-emitting elements on the substrate.

[0011] Among them, the materials of the first electrode and the second electrode are both conductive transparent materials.

[0012] Preferably, the material of the first electrode includes indium tin oxide (ITO), and / or, the material of the second electrode includes indium tin oxide (ITO).

[0013] Preferably, the materials of the first electrode and the second electrode are the same.

[0014] Among them, the display panel further includes a first insulating layer, which is disposed between the first electrode and the second electrode on the side facing away from the light-emitting element.

[0015] Preferably, the display panel further includes a second insulating layer, which is disposed between the first electrode and the light-emitting element and between the first electrode and the substrate.

[0016] Preferably, the materials of the first insulating layer and the second insulating layer are the same.

[0017] Preferably, the material of the first insulating layer / second insulating layer includes silicon oxide (SiO).

[0018] Among them, the adjusting member includes a photochromic layer. Among them, when the light-emitting element emits light, under the irradiation of the light-emitting element, the transparency of the photochromic layer is less than the transparency threshold, and when the light-emitting element does not emit light, the transparency of the photochromic layer is greater than or equal to the transparency threshold.

[0019] Preferably, the material of the photochromic layer includes at least one of inorganic photochromic materials and organic photochromic materials.

[0020] Preferably, the inorganic photochromic material includes at least one of silver halide, zinc halide, cadmium halide, copper halide, and magnesium halide.

[0021] Preferably, the organic photochromic material includes at least one of spiropyran, spirooxazine dyes, diarylethene derivatives, dehydro-pyridine, furylfulgide derivatives, and azobenzene derivatives.

[0022] Among them, the display panel further includes a driving circuit layer, which is disposed between the substrate and the light-emitting layer, and a plurality of light-emitting elements are electrically connected to the driving circuit layer.

[0023] Preferably, the light-emitting element is an LED.

[0024] To solve the above technical problems, another technical solution adopted in this application is: to provide a display device, which includes the display panel described in the above embodiments.

[0025] The beneficial effect of this application is: in this application, by disposing the adjusting member between two adjacent light-emitting elements, when the light-emitting element emits light, the transparency of the adjusting member is less than the transparency threshold, which can prevent the problem of light crosstalk between adjacent light-emitting elements; when the light-emitting element does not emit light, the transparency of the adjusting member is greater than or equal to the transparency threshold, which can improve the light transmittance of the display panel and ensure the transparent display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0027] Figure 1 is a schematic structural diagram of an embodiment of the display panel in this application;

[0028] Figure 2 is Figure 1 a schematic structural diagram of the display panel when the light-emitting element emits light;

[0029] Figure 3 is Figure 1 a schematic structural diagram of the display panel when the light-emitting element does not emit light;

[0030] Figure 4 is a schematic structural diagram of another embodiment of the display panel in this application;

[0031] Figure 5 is a schematic structural diagram of another embodiment of the display panel in this application;

[0032] Figure 6 is a schematic structural diagram of another embodiment of the display panel in this application;

[0033] Explanation of the reference numerals: 10 substrate; 20 light-emitting layer; 21 light-emitting element; 22 electrode; 30 adjustment member; 31 electrochromic layer; 32 first electrode; 33 second electrode; 34 first insulating layer; 35 second insulating layer; 40 photochromic layer; 50 driving circuit layer; 51 pixel circuit; 52 transparent flat layer. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0036] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0037] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0039] Please refer to Figure 1 , this application provides a display panel, which includes a substrate 10, a light-emitting layer 20 and an adjusting member 30. Among them, the light-emitting layer 20 is disposed on one side of the substrate 10 and includes a plurality of light-emitting elements 21; the adjusting member 30 is disposed between two adjacent light-emitting elements 21. Among them, the adjusting member 30 is configured to: when the light-emitting element 21 emits light, the transparency of the adjusting member 30 is less than the transparency threshold, and when the light-emitting element 21 does not emit light, the transparency of the adjusting member 30 is greater than or equal to the transparency threshold.

[0040] Specifically, the light-emitting layer 20 is disposed on one side of the substrate 10 and includes a plurality of light-emitting elements 21 arranged in an array. The display function of the display panel is realized by the light emission of the light-emitting elements 21. The adjusting member 30 is disposed between two adjacent light-emitting elements 21. When the light-emitting element 21 emits light, the transparency of the adjusting member 30 is less than the transparency threshold, that is, at this time, the adjusting member 30 is opaque or can transmit a small amount of light, which can prevent the problem of light crosstalk between adjacent light-emitting elements 21; when the light-emitting element 21 does not emit light, the transparency of the adjusting member 30 is greater than or equal to the transparency threshold, that is, at this time, the adjusting member 30 allows a large amount of light to pass through, thereby increasing the light transmittance and further ensuring the transparent display effect of the display panel.

[0041] Among them, the transparency threshold is a threshold that those skilled in the art can adjust according to the actual scenario and actual needs. The transparency thresholds corresponding to different display panels may be the same or different, and the transparency thresholds corresponding to the same display panel may be the same or different. Generally speaking, the setting of the transparency threshold only needs to satisfy: the light transmittance of the adjusting member 30 when the transparency is less than the transparency threshold is less than the light transmittance of the adjusting member 30 when the transparency is greater than or equal to the transparency threshold, so that the light transmittance of the adjusting member 30 when the light-emitting element 21 emits light is less than the light transmittance when the light-emitting element 21 does not emit light.

[0042] Please continue to refer to Figure 1 , the adjusting member 30 includes an electrochromic layer 31 and a first electrode 32 and a second electrode 33 for applying a voltage to the electrochromic layer 31; among them, when the light-emitting element 21 emits light, the first electrode 32 and the second electrode 33 are applied with a voltage to make the transparency of the electrochromic layer 31 less than the transparency threshold, and when the light-emitting element 21 does not emit light, the first electrode 32 and the second electrode 33 are not applied with a voltage to make the transparency of the electrochromic layer 31 greater than or equal to the transparency threshold.

[0043] Specifically, by applying a voltage to the first electrode 32 and the second electrode 33, the change of the electrochromic layer 31 is controlled. The state of the electrochromic layer 31 is different in two cases: when a voltage is applied to the electrochromic layer 31 and when no voltage is applied to the electrochromic layer 31. In one embodiment, when the light-emitting element 21 emits light, a voltage is applied to the first electrode 32 and the second electrode 33 to make the transparency of the electrochromic layer 31 less than the transparency threshold, so that the electrochromic layer 31 can prevent light crosstalk between adjacent light-emitting elements 21; when the light-emitting element 21 does not emit light, no voltage is applied to the first electrode 32 and the second electrode 33. At this time, the transparency of the electrochromic layer 31 is greater than or equal to the transparency threshold, and the transparency of the display panel can be improved at this time.

[0044] Among them, when the light-emitting element 21 emits light, a voltage is applied to the electrochromic layer 31, and when the light-emitting element 21 does not emit light, no voltage is applied to the electrochromic layer 31, which is beneficial to synchronously control the light-emitting layer 20 and the electrochromic layer 31. At the same time, when the light-emitting element 21 does not emit light, no power is applied to the electrochromic layer 31, which can avoid energy waste.

[0045] In another embodiment, it can also be set that when the light-emitting element 21 emits light, no voltage is applied to the first electrode 32 and the second electrode 33 to make the transparency of the electrochromic layer 31 less than the transparency threshold, so that the electrochromic layer 31 can prevent light crosstalk between adjacent light-emitting elements 21; when the light-emitting element 21 does not emit light, a voltage is applied to the first electrode 32 and the second electrode 33. At this time, the transparency of the electrochromic layer 31 is greater than or equal to the transparency threshold, and at this time, the normal transmission of light is ensured and the transparency of the display panel is improved.

[0046] Please continue to refer to Figure 1 、 Figure 2 and Figure 3 , the material of the electrochromic layer 31 includes polymer dispersed liquid crystal. When the light-emitting element 21 emits light, the polymer dispersed liquid crystal is in a scattered state (as shown in Figure 2 ), and when the light-emitting element 21 does not emit light, the polymer dispersed liquid crystal is in an aligned state (as shown in Figure 3 ). Specifically, the polymer dispersed liquid crystal (PDLC) has different states when powered on and powered off. In this embodiment, it is set that when the light-emitting element 21 emits light, the polymer dispersed liquid crystal is in a scattered state. At this time, the polymer dispersed liquid crystal can prevent the light emitted by the light-emitting element 21 from passing through, thereby preventing light crosstalk; when the light-emitting element 21 does not emit light, the polymer dispersed liquid crystal is in an aligned state, and at this time, the light is allowed to pass through, and the transparency of the display panel is improved.

[0047] Please continue to refer to Figure 1, the number of the adjusting members 30 is plural, and at least one light-emitting element 21 is arranged between two adjacent adjusting members 30. Among them, the first electrodes 32 of two adjacent adjusting members 30 are electrically connected, and / or the second electrodes 33 of two adjacent adjusting members 30 are electrically connected.

[0048] Specifically, the adjusting members 30 can be arranged between any adjacent light-emitting elements 21, or the adjusting members can be arranged between some adjacent light-emitting elements 21.

[0049] Among them, the first electrodes 32 of two adjacent adjusting members 30 are electrically connected, so that a voltage can be applied to the first electrodes 32 of the two adjusting members 30 simultaneously through one signal line, which is not only convenient for control, but also can reduce the number of signal lines and the process difficulty.

[0050] Among them, the second electrodes 33 of two adjacent adjusting members 30 are electrically connected, so that a voltage can be applied to the second electrodes 33 of the two adjusting members 30 simultaneously through one signal line, which is not only convenient for control, but also can reduce the number of signal lines and the process difficulty.

[0051] Of course, in other embodiments, the first electrodes 32 of two adjacent adjusting members 30 are insulated, and / or the second electrodes 33 of two adjacent adjusting members 30 are insulated. At this time, only the two adjacent adjusting members 30 need to be controlled separately.

[0052] Please continue to refer to Figure 1 , the first electrode 32 is at least arranged between the electrochromic layer 31 and the substrate 10, and the second electrode 33 is arranged on the side of the electrochromic layer 31 away from the substrate 10. Specifically, the first electrode 32 and the second electrode 33 are respectively located on two opposite sides of the electrochromic layer 31. This design method is convenient for the preparation of the first electrode 32 and the second electrode 33, ensures that the first electrode 32 and the second electrode 33 are insulated, and reduces the risk of short circuit between the two. Of course, in other embodiments, the first electrode 32 and the second electrode 33 can also be arranged in other places, as long as it is ensured that a voltage can be applied to the electrochromic layer through the first electrode and the second electrode, and the first electrode and the second electrode are insulated.

[0053] In one embodiment, the first electrode 32 extends to the side of the light-emitting element 21 away from the substrate 10, and the first electrodes 32 of two adjacent adjusting members 30 are continuous and unbroken. Specifically, at this time, the first electrode 32 is a whole-layer structure, and the whole-layer structure is convenient for preparation. Of course, in other embodiments, the first electrodes of two adjacent adjusting members can also be electrically connected through signal lines.

[0054] In one embodiment, the second electrode 33 extends to the side of the light-emitting element 21 facing away from the substrate 10, and the second electrodes 33 of two adjacent adjusting members 30 are continuous and unbroken. Specifically, at this time, the second electrode 33 is a whole-layer structure, and the whole-layer structure is convenient for preparation. Of course, in other embodiments, the second electrodes 33 of two adjacent adjusting members 30 can also be electrically connected through signal lines.

[0055] In another embodiment, please refer to Figure 4 and Figure 5 , the orthographic projection of the first electrode 32 on the substrate 10 is located between the orthographic projections of two adjacent light-emitting elements 21 on the substrate 10. That is to say, at this time, the first electrode 32 does not extend to the side of the light-emitting element 21 facing away from the substrate 10, and the orthographic projection of the first electrode 32 on the substrate 10 does not overlap with the orthographic projection of the light-emitting element 21 on the substrate 10.

[0056] In one embodiment, please refer to Figure 5 , the orthographic projection of the second electrode 33 on the substrate 10 is located between the orthographic projections of two adjacent light-emitting elements 21 on the substrate 10. That is to say, at this time, the orthographic projection of the second electrode 33 on the substrate 10 does not overlap with the orthographic projection of the light-emitting element 21 on the substrate 10.

[0057] Please continue to refer to Figure 1 , the materials of the first electrode 32 and the second electrode 33 are both conductive transparent materials, which ensure the light transmittance of the display panel and improve the transparency of the display panel.

[0058] In one embodiment, the material of the first electrode 32 includes indium tin oxide ITO. Indium tin oxide ITO is a mature material currently used in the industry and has the advantage of being convenient for obtaining materials.

[0059] In one embodiment, the material of the second electrode 33 includes indium tin oxide ITO, which also has the advantage of being convenient for obtaining materials.

[0060] In one embodiment, the materials of the first electrode 32 and the second electrode 33 are the same. Specifically, the first electrode 32 and the second electrode 33 are prepared with the same material, which can simplify the preparation process and improve the preparation efficiency. Of course, in other embodiments, the materials of the first electrode 32 and the second electrode 33 can also be different, which are specifically set according to actual requirements.

[0061] Please continue to refer to Figure 1 , the display panel further includes a first insulating layer 34, which is disposed between the first electrode 32 and the second electrode 33 on the side facing away from the light-emitting element 21. Specifically, the first insulating layer 34 is disposed between the first electrode 32 and the second electrode 33, and functions to isolate the first electrode 32 and the second electrode 33, ensuring insulation between the first electrode 32 and the second electrode 33.

[0062] In one embodiment, the display panel further includes a second insulating layer 35, which is disposed between the first electrode 32 and the light-emitting element 21, and between the first electrode 32 and the substrate 10. Specifically, the second insulating layer 35 is disposed between the first electrode 32 and the light-emitting element 21, and also between the first electrode 32 and the substrate 10, serving to isolate the first electrode 32 from the light-emitting element 21 and the substrate 10, and at the same time, it can also protect the light-emitting element 21 from being damaged in subsequent processes.

[0063] In one embodiment, the first insulating layer 34 and the second insulating layer 35 are made of the same material. Specifically, the first insulating layer 34 and the second insulating layer 35 are prepared using the same material, which can simplify the preparation process and improve the preparation efficiency.

[0064] In one embodiment, the material of the first insulating layer 34 or the second insulating layer 35 includes SiO. Specifically, SiO is a mature material currently used in the industry, having the advantage of being easy to obtain materials. Of course, other insulating materials such as silicon dioxide SiO2 and silicon nitride SiN can be selected for both the first insulating layer 34 and the second insulating layer 35.

[0065] Please refer to Figure 6 , the adjusting member 30 includes a photochromic layer 40. Among them, when the light-emitting element 21 emits light, under the irradiation of the light-emitting element 21, the transparency of the photochromic layer 40 is less than the transparency threshold. When the light-emitting element 21 does not emit light, the transparency of the photochromic layer 40 is greater than or equal to the transparency threshold. At the same time, since the transparency of the photochromic layer 40 can change after receiving external light, at this time, there is no need to provide the first electrode 32 and the second electrode 34, and the setting of the photochromic layer 40 can meet the transparent display effect of the display panel.

[0066] Specifically, different from the above-described embodiment, at this time, the transparency of the adjusting member 30 changes under different illumination conditions. Specifically, when the light-emitting element 21 emits light, under the irradiation of the light-emitting element 21, the transparency of the photochromic layer 40 is less than the transparency threshold. At this time, the photochromic layer 40 does not allow or only allows a small amount of light to pass through, serving to prevent the problem of light crosstalk between adjacent light-emitting elements 21; when the light-emitting element 21 does not emit light, the transparency of the photochromic layer 40 is greater than or equal to the transparency threshold. At this time, the photochromic layer 40 allows a large amount of light to pass through, which can improve the light transmittance and ensure the transparent display effect of the display panel.

[0067] At the same time, in this embodiment, by irradiating the photochromic layer 40 in the adjusting member 30 with the light emitted by the light-emitting element, there is no need to provide an additional light source, which can reduce the volume of the display panel and the cost.

[0068] Of course, in another embodiment, other light sources may also be provided to adjust the state of the photochromic layer 40. For example, an additional light source (defined as the target light source) is provided to irradiate the photochromic layer 40. When the light-emitting element emits light, the target light source emits light and irradiates the photochromic layer 40, so that the transparency of the photochromic layer 40 is less than the transparency threshold. When the light-emitting element does not emit light, the target light source is turned off, and the transparency of the photochromic layer 40 is greater than or equal to the transparency threshold, improving the light transmittance and thus ensuring the transparent display effect of the display panel.

[0069] In one embodiment, the material of the photochromic layer 40 includes at least one of an inorganic photochromic material and an organic photochromic material. This setting enables a wide range of material selections for the photochromic layer 40 and has the advantage of being easy to prepare.

[0070] In one embodiment, the inorganic photochromic material includes at least one of silver halide, zinc halide, cadmium halide, copper halide, and magnesium halide. The selection range is wide, and a suitable inorganic photochromic material can be selected according to the requirements of the display panel.

[0071] In one embodiment, the organic photochromic material includes at least one of spiropyran, spirooxazine dyes, diarylethene derivatives, dehydro-pyridine, furylfulgide derivatives, and azobenzene derivatives. The selection range is wide, and a suitable organic photochromic material can be selected according to the requirements of the display panel.

[0072] Please continue to refer to Figure 1 and Figure 2 , the display panel further includes a driving circuit layer 50, which is disposed between the substrate 10 and the light-emitting layer 20, and a plurality of light-emitting elements 21 are electrically connected to the driving circuit layer 50. Specifically, the electrode 22 of the light-emitting element 21 is electrically connected to the driving circuit layer 50, and the driving circuit layer 50 controls the lighting of the light-emitting element 21.

[0073] Among them, the driving circuit layer 50 may include structures such as a pixel circuit 51 and a transparent flat layer 52.

[0074] In one embodiment, the light-emitting element 21 is an LED, and specifically, the light-emitting element 21 may be a mini light-emitting diode (mini LED) or a micro light-emitting diode (Micro LED).

[0075] This application also provides a display device, which includes the display panel described in the above embodiment. The display device in the embodiments of the present invention may be any product or component with a display function, such as an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, or a navigator.

[0076] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that, The display panel includes: a substrate; a light-emitting layer disposed on one side of the substrate and including a plurality of light-emitting elements; a regulating member disposed between two adjacent light-emitting elements, wherein the regulating member is configured to have a transparency less than a transparency threshold when the light-emitting element emits light, and a transparency greater than or equal to the transparency threshold when the light-emitting element does not emit light.

2. The display panel according to claim 1, wherein the regulating member includes an electrochromic layer, a first electrode, and a second electrode for applying a voltage to the electrochromic layer; wherein when the light-emitting element emits light, the first electrode and the second electrode are applied with a voltage to make the transparency of the electrochromic layer less than the transparency threshold, and when the light-emitting element does not emit light, the first electrode and the second electrode are not applied with a voltage to make the transparency of the electrochromic layer greater than or equal to the transparency threshold.

3. The display panel according to claim 2, wherein the material of the electrochromic layer includes polymer dispersed liquid crystal, and when the light-emitting element emits light, the polymer dispersed liquid crystal is in a scattered state, and when the light-emitting element does not emit light, the polymer dispersed liquid crystal is in an orderly arranged state.

4. The display panel according to claim 2, wherein the number of the regulating members is plural, and at least one light-emitting element is disposed between two adjacent regulating members, wherein the first electrodes of two adjacent regulating members are electrically connected, and / or the second electrodes of two adjacent regulating members are electrically connected.

5. The display panel according to claim 4, wherein the first electrode is disposed at least between the electrochromic layer and the substrate, and the second electrode is disposed on a side of the electrochromic layer away from the substrate; Preferably, the first electrode extends to a side of the light-emitting element away from the substrate, and the first electrodes of two adjacent regulating members are continuous without interruption, and / or the second electrode extends to a side of the light-emitting element away from the substrate, and the second electrodes of two adjacent regulating members are continuous without interruption; Or, the orthographic projection of the first electrode on the substrate is located between the orthographic projections of two adjacent light-emitting elements on the substrate, and / or the orthographic projection of the second electrode on the substrate is located between the orthographic projections of two adjacent light-emitting elements on the substrate.

6. The display panel according to claim 5, wherein the materials of the first electrode and the second electrode are both conductive transparent materials; Preferably, the material of the first electrode includes indium tin oxide (ITO), and / or the material of the second electrode includes indium tin oxide (ITO); Preferably, the materials of the first electrode and the second electrode are the same.

7. The display panel according to claim 5, wherein the display panel further includes: a first insulating layer disposed between the first electrode and the second electrode on a side away from the light-emitting element; Preferably, the display panel further includes: A second insulating layer is disposed between the first electrode and the light-emitting element and between the first electrode and the substrate; Preferably, the first insulating layer and the second insulating layer are made of the same material; Preferably, the material of the first insulating layer / the second insulating layer includes silicon oxide SiO.

8. The display panel according to claim 1, wherein The adjusting member includes a photochromic layer. When the light-emitting element emits light, the transparency of the photochromic layer is less than the transparency threshold under the irradiation of the light-emitting element. When the light-emitting element does not emit light, the transparency of the photochromic layer is greater than or equal to the transparency threshold; Preferably, the material of the photochromic layer includes at least one of an inorganic photochromic material and an organic photochromic material; Preferably, the inorganic photochromic material includes at least one of silver halide, zinc halide, cadmium halide, copper halide, and magnesium halide; Preferably, the organic photochromic material includes at least one of spiropyran, spirooxazine dye, diarylethene derivative, dehydro-pyridine, furylfulgide derivative, and azobenzene derivative.

9. The display panel according to claim 1, wherein The display panel further includes: A driving circuit layer is disposed between the substrate and the light-emitting layer, and a plurality of the light-emitting elements are electrically connected to the driving circuit layer; Preferably, the light-emitting element is an LED.

10. A display device, characterized in that, Including the display panel according to any one of claims 1 to 9.

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