Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a substrate; the light-emitting layer is arranged on one side of the substrate and at least comprises a first sub-pixel and a second sub-pixel, the first sub-pixel and the second sub-pixel are arranged in the direction parallel to the substrate, the first sub-pixel emits light in the direction deviating from the substrate, the second sub-pixel emits light in the direction pointing to the substrate, the driving layer is arranged between the substrate and the light-emitting layer, and the driving layer is arranged between the substrate and the light-emitting layer. Comprising a driving circuit, and the driving circuit is configured to be capable of driving the first sub-pixels and the second sub-pixels to emit light alternately. According to the display panel, double-sided display can be achieved, and the display quality of the display panel can be guaranteed.

Description

Technical Field

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

[0002] With the development and popularization of display technology in recent years, display panels have been applied to various electronic devices, such as mobile phones, tablet computers or other portable electronic devices. However, the inventor of the present application found that the display quality of current display panels needs to be further improved. Summary of the invention

[0003] The present application provides a display panel and a display device, which can realize double-sided display and ensure the display quality of the display panel.

[0004] A first aspect of an embodiment of the present application provides a display panel, which includes: a substrate; a light-emitting layer, arranged on one side of the substrate, including at least a first sub-pixel and a second sub-pixel, wherein the first sub-pixel and the second sub-pixel are arranged in a direction parallel to the substrate, and the first sub-pixel emits light in a direction away from the substrate, and the second sub-pixel emits light in a direction pointing toward the substrate; a driving layer, arranged between the substrate and the light-emitting layer, including a driving circuit, and the driving circuit is configured to be able to drive the first sub-pixel and the second sub-pixel to emit light alternately.

[0005] A second aspect of an embodiment of the present application provides a display device, comprising a display panel in any one of the above-mentioned implementations.

[0006] The beneficial effect is: the present application arranges the first sub-pixel and the second sub-pixel in a direction parallel to the substrate, and the first sub-pixel emits light in a direction away from the substrate, and the second sub-pixel emits light in a direction pointing to the substrate, which can avoid the light emitted by the first sub-pixel and the light emitted by the second sub-pixel from influencing each other. At the same time, the driving circuit is configured to drive the first sub-pixel and the second sub-pixel to emit light alternately, so that when the lighting frequency of the first sub-pixel and the second sub-pixel is high enough, because the human eye cannot recognize the high-frequency flicker, both surfaces of the display panel will appear to be constantly lit, thereby realizing double-sided display of the display panel and ensuring the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0008] Figure 1 It is a schematic structural diagram of an embodiment of a display panel of the present application;

[0009] Figure 2 is a schematic structural diagram of another embodiment of the display panel of the present application;

[0010] Figure 3 is a structural schematic diagram of another embodiment of the display panel of the present application;

[0011] Figure 4 It is a structural schematic diagram of an implementation method of a driving circuit of the present application;

[0012] Figure 5 is a structural schematic diagram of yet another embodiment of the display panel of the present application;

[0013] Figure 6 is a schematic diagram of a first pixel unit and a second pixel unit emitting light in one embodiment;

[0014] Figure 7 is a schematic diagram of another embodiment in which the first pixel unit and the second pixel unit emit light;

[0015] Figure 8 is a schematic diagram of light emission of a first pixel unit and a second pixel unit visually;

[0016] Fig. 9 It is a schematic structural diagram of an embodiment of a display device of the present application. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] It should be noted that the terms "first" and "second" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0019] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of an embodiment of a display panel of the present application. The display panel 10 includes a substrate 100, a driving layer 200 and a light-emitting layer 300 which are stacked in sequence.

[0020] The substrate 100 plays a supporting role in the display panel. It can be a flexible substrate or a rigid substrate. When the substrate 100 is a flexible substrate, its material can be polyimide (PI), or it can be a multilayer structure in which organic layers and inorganic layers are alternately stacked. For example, the substrate 100 includes an inorganic layer, an organic layer, and an inorganic layer stacked in sequence. At this time, the multilayer structure in which the organic layer and the inorganic layer are alternately stacked can take into account the flexibility and strength of the substrate 100, so that the display panel has a bendable function and can resist fracture and deformation; when the substrate 100 is a rigid substrate, its material can be glass or metal. In one embodiment, in order to prevent the substrate 100 from affecting the light output of the second sub-pixel 320 below, the substrate 100 is set to a transparent substrate, for example, the material of the substrate 100 includes CPI (polyimide). In summary, the present application does not limit the structure of the substrate 100.

[0021] The light-emitting layer 300 is arranged on one side of the substrate 100 for emitting light, so that the display panel 10 has a display function. The light-emitting layer 300 includes at least a first sub-pixel 310 and a second sub-pixel 320. The orthographic projections of the first sub-pixel 310 and the second sub-pixel 320 on the substrate 100 do not overlap, that is, the first sub-pixel 310 and the second sub-pixel 320 are arranged in a direction parallel to the substrate 100, and the first sub-pixel 310 emits light in a direction Y1 away from the substrate 100, and the second sub-pixel 320 emits light in a direction Y2 pointing to the substrate 100, that is, the first sub-pixel 310 and the second sub-pixel 320 have different light emission directions. It is precisely because the first sub-pixel 310 and the second sub-pixel 320 have different light emission directions that the display panel 10 can achieve double-sided light emission. Among them, the light emission colors of the first sub-pixel 310 and the second sub-pixel 320 can be the same or different, and there is no limitation here. In one embodiment, the number of the first sub-pixel 310 and the second sub-pixel 320 are both multiple. In one embodiment, the first sub-pixels 310 and the second sub-pixels 320 are alternately arranged in a plane parallel to the substrate 100. At the same time, since the orthographic projections of the first sub-pixels 310 and the second sub-pixels 320 on the substrate 100 do not overlap, the light emitted by the first sub-pixels 310 and the second sub-pixels 320 can be prevented from affecting each other, thereby improving the display effect of the display panel 10.

[0022] The driving layer 200 is disposed between the substrate 100 and the light emitting layer 300 and is used to drive the light emitting layer 300 to emit light. The driving layer 200 includes a driving circuit ( Figure 1 (not shown), the driving circuit is configured to drive the first sub-pixel 310 and the second sub-pixel 320 to emit light alternately, so that when the lighting frequency of the first sub-pixel 310 and the second sub-pixel 320 is high enough, because the human eye cannot recognize the high-frequency flicker, both surfaces of the display panel 10 will appear to be constantly lit, thereby realizing double-sided display of the display panel 10 and ensuring the display effect of the display panel.

[0023] At the same time, since the first sub-pixel 310 and the second sub-pixel 320 emit light alternately, the driving circuit can use the same pixel circuit to time-share drive the first sub-pixel 310 and the second sub-pixel 320 to emit light, providing technical support for reducing the number of wiring and components and improving the transmittance of the display panel 10.

[0024] Continue reading Figure 1In one embodiment, the display panel 10 further includes a pixel definition layer 400, and the pixel definition layer 400 is formed with a plurality of pixel openings (not shown in the figure), and the first sub-pixel 310 and the second sub-pixel 320 are respectively formed in different pixel openings (the first sub-pixel 310 is formed in the first opening, and the second sub-pixel 320 is formed in the second opening). The pixel definition layer 400 can reduce the light mixing phenomenon. In one embodiment, the pixel definition layer 400 can be formed of an organic material such as polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin or phenolic resin, or formed of an inorganic material such as SiNx. In one embodiment, the material of the pixel definition layer 400 includes a light absorbing material, which can further avoid the crosstalk phenomenon of the light of the first sub-pixel 310 and the second sub-pixel 320.

[0025] Continue reading Figure 1 In one embodiment, the first sub-pixel 310 includes a first electrode 311, a first light-emitting material layer 312, and a second electrode 313, which are sequentially stacked in a direction away from the substrate 100. The first sub-pixel 310 includes a third electrode 321, a second light-emitting material layer 322, and a fourth electrode 323, which are sequentially stacked in a direction away from the substrate 100. Specifically, a voltage difference is formed between the first electrode 311 and the second electrode 313, so that the first light-emitting material layer 312 emits light. Similarly, a voltage difference is formed between the third electrode 321 and the fourth electrode 323, so that the second light-emitting material layer 322 emits light. When the first sub-pixel 310 and the second sub-pixel 320 emit the same color, the first light-emitting material layer 312 and the second light-emitting material layer 322 are made of the same material, and the first light-emitting material layer 312 and the second light-emitting material layer 322 can be arranged at intervals or continuously; when the first sub-pixel 310 and the second sub-pixel 320 emit different colors, the first light-emitting material layer 312 and the second light-emitting material layer 322 are made of different materials, and the first light-emitting material layer 312 and the second light-emitting material layer 322 are arranged at intervals. Figure 1 In the embodiment, the first light emitting material layer 312 and the second light emitting material layer 322 are arranged at intervals. Figure 2 In the embodiment, the first light emitting material layer 312 and the second light emitting material layer 322 are continuous and uninterrupted.

[0026] In one embodiment, the thickness of the fourth electrode 323 is greater than that of the second electrode 313 , so that the fourth electrode 323 can be used to reflect light emitted by the second light-emitting material layer 322 , thereby ensuring that the second sub-pixel 320 emits light in a direction Y2 pointing to the substrate 100 .

[0027] In one embodiment, the thickness of the second electrode 313 is in the range of For example, the thickness of the second electrode 313 is or In one embodiment, the thickness of the fourth electrode 323 is in the range of For example, the thickness of the fourth electrode 323 is or wait.

[0028] In one embodiment, the material of the fourth electrode 323 is the same as that of the second electrode 313 , so that during preparation, the second electrode 313 and the fourth electrode 323 can be prepared by the same process, thereby improving preparation efficiency.

[0029] In one embodiment, the fourth electrode 323 is electrically connected to the second electrode 313 , so that voltage can be applied to both the fourth electrode 323 and the second electrode 313 by applying voltage to only one of them, thereby reducing the number of wirings.

[0030] In one embodiment, the fourth electrode 323 is continuous with the second electrode 313. During preparation, a conductive layer of the entire surface can be formed first, and then the conductive layer is patterned using two FMM (Fine Metal Mask) processes to obtain the fourth electrode 323 and the second electrode 313, or the conductive layer is patterned using one FMM combined with a laser etching process to obtain the fourth electrode 323 and the second electrode 313. In short, the present application does not limit the preparation process of the fourth electrode 323 and the second electrode 313. And the fourth electrode 323 and the second electrode 313 may be electrically connected or not electrically connected.

[0031] In one embodiment, a reflector may be disposed on the side of the second sub-pixel 320 away from the substrate 100 to reflect the light of the second sub-pixel 320, so that the light emitted by the second sub-pixel 320 is directed toward the substrate 100. In one embodiment, the reflector may be a distributed Bragg reflector.

[0032] In one embodiment, the thickness of the third electrode 321 is smaller than the thickness of the first electrode 311 , so as to increase the transmittance of the light emitted by the second sub-pixel 320 .

[0033] In one implementation, the light transmittance of the third electrode 321 is not less than 20%. For example, the light transmittance of the third electrode 321 is 20%, 30% or 40%, etc., which is not limited here.

[0034] In one embodiment, in order to further improve the light transmittance of the third electrode 321, the third electrode 321 is a transparent electrode. In one embodiment, the material of the third electrode 321 includes at least one of indium tin oxide (ITO), indium zinc oxide (IZO) and zinc oxide (ZnO). In a specific example, the material of the third electrode 321 includes indium tin oxide.

[0035] The first electrode 311 may be a laminated structure or a single-layer structure. In one embodiment, the first electrode 311 is a laminated structure. For example, the first electrode 311 includes a first indium tin oxide layer, a silver layer, and a second indium tin oxide layer stacked in sequence in a direction away from the substrate 100. In short, the present application does not limit the structure of the first electrode 311.

[0036] In one embodiment, the first electrode 311 includes a first indium tin oxide layer, a silver layer, and a second indium tin oxide layer stacked in sequence in a direction away from the substrate 100, and the material of the third electrode 321 includes indium tin oxide. In this case, during the preparation process, a whole surface of the indium tin oxide layer can be prepared first, and then the indium tin oxide layer can be patterned by wet etching to obtain the third electrode 321, and then the first electrode 311 can be prepared. This process can ensure that the wet etching between the first electrode 311 and the third electrode 321 does not affect each other by adjusting the film forming and wet etching processes.

[0037] In one embodiment, continue to refer to Figure 1 The first sub-pixel 310 further includes a first common layer 314 and a second common layer 315, wherein the first common layer 314 is located between the first electrode 311 and the first light-emitting material layer 312, and the second common layer 315 is located between the first light-emitting material layer 312 and the second electrode 313, that is, in the direction away from the substrate 100, the first electrode 311, the first common layer 314, the first light-emitting material layer 312, the second common layer 315 and the second electrode 313 are stacked in sequence. Specifically, the first common layer 314 may include at least one of a hole injection layer (HIL) and a hole transport layer (HTL), and the second common layer 315 may include at least one of an electron injection layer (EIL) and an electron transport layer (ETL).

[0038] The second sub-pixel 320 includes a third common layer 324 and a fourth common layer 325, wherein the third common layer 324 is located between the third electrode 321 and the second light-emitting material layer 322, and the fourth common layer 325 is located between the second light-emitting material layer 322 and the fourth electrode 323, that is, in the direction away from the substrate 100, the third electrode 321, the third common layer 324, the second light-emitting material layer 322, the fourth common layer 325 and the fourth electrode 323 are stacked in sequence. Specifically, the third common layer 324 may include at least one of a hole injection layer (HIL) and a hole transport layer (HTL), and the fourth common layer 325 may include at least one of an electron injection layer (EIL) and an electron transport layer (ETL).

[0039] In one embodiment, if Figure 2 As shown, in order to improve the manufacturing efficiency, the first common layer 314 and the third common layer 324 are continuous and uninterrupted, and the second common layer 315 and the fourth common layer 325 are continuous and uninterrupted. Of course, in other embodiments, the first common layer 314 and the third common layer 324 may also be disconnected (such as Figure 1 As shown in FIG. 1 , the second common layer 315 and the fourth common layer 325 may also be disconnected.

[0040] Continue reading Figure 1 In one implementation, the display panel 10 further includes a connection layer 500 .

[0041] The connecting layer 500 is located between the driving layer 200 and the light-emitting layer 300, and includes a first routing line 510 and a second routing line 520. The first routing line 510 connects the first sub-pixel 310 and the driving circuit, and the second routing line 520 connects the second sub-pixel 320 and the driving circuit. The transmittance of the second routing line 520 is greater than the transmittance of the first routing line 510, thereby avoiding the second routing line 520 from affecting the light output of the second sub-pixel 320, and can further improve the light output rate of the display panel 100.

[0042] In one embodiment, the transmittance of the connection layer 500 within the projection range of the second sub-pixel 320 is greater than the transmittance of the connection layer 500 within the projection range of the first sub-pixel 310, ensuring that the light emitted by the second sub-pixel 320 can be emitted through the connection layer 500.

[0043] In one embodiment, at least the second wiring 520 located within the projection range of the second sub-pixel 320 is transparently set, that is, the second wiring 520 is transparently set, or part of the second wiring 520 is transparently set, and the transparently set part is located within the projection range of the second sub-pixel 320, so that the second wiring 520 can be prevented from affecting the light output of the second sub-pixel 320, and the light output rate of the display panel 100 can be further improved. It should be noted that in the scheme of the present application, if the transmittance of a certain structure is greater than 80%, the structure can be considered to be transparent. In one embodiment, the material of the second wiring 520 includes at least one of indium tin oxide (ITO), indium zinc oxide (IZO) and zinc oxide (ZnO). In a specific example, the material of the second wiring 520 includes indium tin oxide.

[0044] In one embodiment, the second wiring 520 and the orthographic projection of the second sub-pixel 320 on the substrate 110 do not overlap, so that the second wiring 520 does not block the light emitted by the second sub-pixel 320 , thereby ensuring the light extraction rate of the display panel 100 .

[0045] In one embodiment, continue to refer to Figure 1 The transmittance of the driving layer 200 within the projection range of the second sub-pixel 320 is greater than the transmittance of the driving layer 200 within the projection range of the first sub-pixel 310, ensuring that the second sub-pixel 320 can emit light through the driving layer 200.

[0046] In one embodiment, at least the driving layer 200 in the projection range of the second sub-pixel 320 is transparent, which can prevent the driving layer 200 from affecting the light output of the second sub-pixel 320. In this case, the driving layer 200 in the projection range of the second sub-pixel 320 can be made of transparent materials.

[0047] In one embodiment, the material of the driving layer 200 disposed within the projection range of the second sub-pixel 320 includes a transparent organic glue.

[0048] In one embodiment, at least the driving circuit located within the projection range of the second sub-pixel 320 is transparently arranged. Specifically, the driving circuit is transparently arranged, or part of the driving circuit is transparently arranged, and the transparently arranged part is located within the projection range of the second sub-pixel 320, so that the driving circuit can be prevented from affecting the light output of the second sub-pixel 320, and the light output rate of the display panel 100 can be further improved. In one embodiment, the driving circuit can be prepared by using at least one material selected from indium tin oxide (ITO), indium zinc oxide (IZO), and zinc oxide (ZnO).

[0049] In one embodiment, the driving circuit and the orthographic projection of the second sub-pixel 320 on the substrate 110 may be arranged not to overlap, thereby also preventing the driving circuit from affecting the light output of the second sub-pixel 320, that is, at this time, no metal layer, device or wiring is arranged within the projection range of the second sub-pixel 320.

[0050] Continue reading Figure 1 The display panel 10 further includes a planarization layer 600, which is located between the driving layer 200 and the light emitting layer 300, and is used to play a planarization role to ensure the flatness of the display panel 10. In one embodiment, in order to prevent the planarization layer 600 from affecting the light output of the second sub-pixel 320, the transmittance of the planarization layer 600 located in the projection range of the second sub-pixel 320 is set to be greater than the transmittance of the planarization layer 600 located in the projection range of the first sub-pixel 310.

[0051] In one embodiment, in order to further prevent the planarization layer 600 from affecting the light output of the second sub-pixel 320, a transparent setting is set for the planarization layer 600 at least in the projection range of the second sub-pixel 320. Among them, the entire planarization layer 600 is transparently set, or a part of the planarization layer 600 is transparently set, and the transparently set part is located in the projection range of the second sub-pixel 320, so that the planarization layer 600 can be prevented from affecting the light output of the second sub-pixel 320, and the light output rate of the display panel 100 can be further improved. In one embodiment, the material of the planarization layer 600 includes transparent CPR.

[0052] In one embodiment, if Figure 1 As shown, there are two planarization layers 600 , one planarization layer 600 is located between the connection layer 500 and the driving layer 200 , and the other planarization layer 600 is located between the connection layer 500 and the light emitting layer 300 .

[0053] See also Figure 3 The fourth electrode 323 is electrically connected to the second electrode 313 , and the driving circuit includes a first driving sub-circuit 740 , a second driving sub-circuit 750 and an alternating current sub-circuit 760 .

[0054] The first driving sub-circuit 740 is used to provide a driving current to the first electrode 311; the second driving sub-circuit 750 is used to provide a driving current to the third electrode 321; the AC sub-circuit 760 is used to alternately input positive and negative voltages to the first electrode 311 and alternately input positive and negative voltages to the third electrode 321, and at the same time, the voltage polarities input by the AC sub-circuit 760 to the first electrode 311 and the third electrode 321 are opposite.

[0055] Specifically, when the AC sub-circuit 760 inputs a positive voltage to the first electrode 311, the AC sub-circuit 760 inputs a negative voltage to the third electrode 321; when the AC sub-circuit 760 inputs a negative voltage to the first electrode 311, the AC sub-circuit 760 inputs a positive voltage to the third electrode 321. At the same time, the AC sub-circuit 760 alternately inputs positive and negative voltages to the first electrode 311, so that the AC sub-circuit 760 also alternately inputs positive and negative voltages to the third electrode 321.

[0056] When the AC sub-circuit 760 inputs a positive voltage to the first electrode 311 and a negative voltage to the third electrode 321, the first sub-pixel 310 is in a forward biased state and the second sub-pixel 320 is in a reverse biased state. Therefore, under the drive of the first driving sub-circuit 740, the first sub-pixel 310 emits light, while the second sub-pixel 320 does not emit light; when the AC sub-circuit 760 inputs a negative voltage to the first electrode 311 and a positive voltage to the third electrode 321, the first sub-pixel 310 is in a reverse biased state and the second sub-pixel 320 is in a forward biased state. Therefore, the first sub-pixel 310 does not emit light, and under the drive of the second driving sub-circuit 750, the second sub-pixel 320 emits light. Therefore, the AC sub-circuit 760 can control the first sub-pixel 310 and the second sub-pixel 320 to be alternately turned on, so that under the cooperation of the first driving sub-circuit 740 and the second driving sub-circuit 750, the first sub-pixel 310 and the second sub-pixel 320 can be alternately illuminated.

[0057] Meanwhile, in this embodiment, the second electrode 313 and the fourth electrode 323 do not need to be connected to an electrical signal. In this case, the second electrode 313 and the fourth electrode 323 play a role in transmitting carriers after being electrically connected.

[0058] See also Figure 4 In another implementation, the driving circuit includes a third driving sub-circuit 710 and a gating sub-circuit 720 .

[0059] The gating subcircuit 720 is electrically connected to the third driving subcircuit 710 and the first subpixel 310 and the second subpixel 320. The gating subcircuit 720 is configured to enable the third driving subcircuit 710 to time-share drive the first subpixel 310 and the second subpixel 320 to emit light. Specifically, the gating subcircuit 720 can select one of the first subpixel 310 and the second subpixel 320 to be electrically connected to the third driving subcircuit 710, so that the third driving subcircuit 710 can alternately drive the first subpixel 310 and the second subpixel 320 to emit light.

[0060] Continue reading Figure 4 The gating subcircuit 720 includes a first switch subcircuit 721 , a second switch subcircuit 722 , a first control line 723 , and a second control line 724 .

[0061] The first end of the first switch subcircuit 721 is electrically connected to the third driving subcircuit 710, the second end of the first switch subcircuit 721 is electrically connected to the first subpixel 310, and the control end of the first switch subcircuit 721 is electrically connected to the first control line 723, which is used to control the first switch subcircuit 721 to be turned on or off.

[0062] The first end of the second switch subcircuit 722 is electrically connected to the third driving subcircuit 710, the second end of the second switch subcircuit 722 is electrically connected to the second sub-pixel 320, and the control end of the second switch subcircuit 722 is electrically connected to the second control line 724, which is used to control the second switch subcircuit 722 to be turned on or off.

[0063] Specifically, when the first control line 723 controls the first switch subcircuit 721 to be turned on and the second control line 724 controls the second switch subcircuit 722 to be turned off, the third driving subcircuit 710 only drives the first sub-pixel 310 to emit light, and the second sub-pixel 320 does not emit light at this time; when the first control line 723 controls the first switch subcircuit 721 to be turned off and the second control line 724 controls the second switch subcircuit 722 to be turned on, the third driving subcircuit 710 only drives the second sub-pixel 320 to emit light, and the first sub-pixel 310 does not emit light at this time; when the first control line 723 controls the first switch subcircuit 721 to be turned off and the second control line 724 controls the second switch subcircuit 722 to be turned off, both the first sub-pixel 310 and the second sub-pixel 320 do not emit light; when the first control line 723 controls the first switch subcircuit 721 to be turned on and the second control line 724 controls the second switch subcircuit 722 to be turned on, the first sub-pixel 310 and the second sub-pixel 320 emit light at the same time. By setting the gating sub-circuit 720, the third driving sub-circuit 710 can drive the first sub-pixel 310 and the second sub-pixel 320 to emit light in a time-sharing manner.

[0064] Continue reading Figure 4 The first switch sub-circuit 721 includes a first switch tube T1, a first end of the first switch tube T1 is electrically connected to the third driving sub-circuit 710, a second end of the first switch tube T1 is electrically connected to the first sub-pixel 310, and a control end of the first switch tube T1 is electrically connected to the first control line 723; the second switch sub-circuit 722 includes a second switch tube T2, a first end of the second switch tube T2 is electrically connected to the third driving sub-circuit 710, a second end of the second switch tube T2 is electrically connected to the second sub-pixel 320, and a control end of the second switch tube T2 is electrically connected to the second control line 724. When the first switch tube T1 is turned on, the first switch sub-circuit 721 is turned on, and when the first switch tube T1 is turned off, the first switch sub-circuit 721 is turned off; when the second switch tube T2 is turned on, the second switch sub-circuit 722 is turned on, and when the second switch tube T2 is turned off, the second switch sub-circuit 722 is turned off.

[0065] The types of the first switch tube T1 and the second switch tube T2 may be the same or different, and are not limited here. In one embodiment, the first switch tube T1 and the second switch tube T2 are both P-type transistors. When the first control line 723 inputs a low-level signal, the first switch tube T1 is turned on. When the first control line 723 inputs a high-level signal, the first switch tube T1 is cut off. Similarly, when the second control line 724 inputs a low-level signal, the second switch tube T2 is turned on. When the second control line 724 inputs a high-level signal, the second switch tube T2 is cut off.

[0066] Among them, the above-mentioned first driving sub-circuit 740, second driving sub-circuit 750, and third driving sub-circuit 710 can be any pixel circuit in the prior art that can drive sub-pixels to emit light, for example, they can be 2T1C, 6T1C, 7T1C, 6T2C, 7T2C or 8T1C circuits; wherein, "T" represents a thin film transistor, and the number before "T" represents the number of thin film transistors; "C" represents a storage capacitor C, and the number before "C" represents the number of storage capacitors C.

[0067] See also Figure 5 In another embodiment, the fourth electrode 323 is electrically connected to the second electrode 313, and the driving circuit includes a fourth driving subcircuit 770, which is electrically connected to the first electrode 311 and the third electrode 321. The fourth driving subcircuit 770 outputs an AC signal to the first electrode 311 or the third electrode 321. Specifically, the fourth driving subcircuit 770 uses the AC signal to time-share drive the first sub-pixel 310 and the second sub-pixel 320 to emit light, thereby making the first sub-pixel 310 and the second sub-pixel 320 emit light alternately.

[0068] In one embodiment, the display panel 10 further includes an encapsulation layer (not shown), which is disposed on the side of the light-emitting layer 300 away from the substrate 100, and is used to encapsulate the light-emitting layer 300 to prevent the invasion of external water vapor. The encapsulation layer includes a plurality of inorganic encapsulation film layers and at least one organic encapsulation film layer stacked, and the at least one organic encapsulation film layer is disposed between the plurality of inorganic encapsulation film layers, and the plurality of inorganic encapsulation films form a closed space that seals the organic encapsulation film layer. It should be understood that the inorganic encapsulation film layer can minimize or completely prevent the penetration of water, oxygen and / or hydrogen into the light-emitting layer 300. Therefore, as an embodiment, the inorganic encapsulation film layer and the organic encapsulation film layer can be alternately stacked, and the inorganic encapsulation film layer can be set as the topmost and bottommost layers of the encapsulation layer, and the outermost inorganic encapsulation film layer can completely cover the organic encapsulation film layer, thereby forming a barrier space that can block the entry of water and oxygen.

[0069] See also Figure 6 and Figure 7When the number of the first sub-pixel 310 and the number of the second sub-pixel 320 are both plural, the plurality of first sub-pixels 310 constitute a plurality of repeated first pixel units 101 ( Figure 6 and Figure 7 Only one first pixel unit 101 is shown. Each first pixel unit 101 includes at least one first sub-pixel 310 ( Figure 6 and Figure 7 In the figure, the first pixel unit 101 includes three first sub-pixels 310 for illustration), and the plurality of second sub-pixels 320 constitute a plurality of repeated second pixel units 102 ( Figure 6 and Figure 7 Only one second pixel unit 102 is shown in each case. Each second pixel unit 102 includes at least one second sub-pixel 320 ( Figure 6 and Figure 7 In the figure, the second pixel unit 102 includes three second sub-pixels 320 for illustration). Through the solution of the present application, the first pixel unit 101 and the second pixel unit 102 can emit light alternately. Figure 6 In the example, the three first sub-pixels 310 in the first pixel unit 101 emit light, and the three second sub-pixels 320 in the second pixel unit 102 do not emit light. Figure 7 In the example, the three first sub-pixels 310 in the first pixel unit 101 do not emit light, and the three second sub-pixels 320 in the second pixel unit 102 emit light. When the frequency of the first pixel unit 101 and the second pixel unit 102 alternately emitting light is high enough, the human eye cannot recognize high-frequency flickering. Figure 8 As shown, visually, the first pixel unit 101 and the second pixel unit 102 emit light at the same time, thereby realizing double-sided display of the display panel 10 .

[0070] It is explained that the projection range of the first sub-pixel 310 mentioned above refers to the projection range of the pixel opening where the first sub-pixel 310 is located (for example, the projection range of the pixel opening where the first sub-pixel 310 is located on the substrate 110), and the projection range of the second sub-pixel 320 refers to the projection range of the pixel opening where the second sub-pixel 320 is located (for example, the projection range of the pixel opening where the second sub-pixel 320 is located on the substrate 110).

[0071] See also Fig. 9 In addition, the present application also protects a display device 20, which includes the display panel 10 in any of the above-mentioned embodiments. The specific structure of the display panel 10 can refer to the above-mentioned related content, wherein the display device 20 can be any device with restricted functions such as a mobile phone, a computer, a game console, etc., and is not limited here.

[0072] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; a light-emitting layer, arranged on one side of the substrate, comprising at least a first sub-pixel and a second sub-pixel, wherein the first sub-pixel and the second sub-pixel are arranged in a direction parallel to the substrate, and the first sub-pixel emits light in a direction away from the substrate, and the second sub-pixel emits light in a direction pointing toward the substrate; The driving layer is disposed between the substrate and the light-emitting layer, and includes a driving circuit, wherein the driving circuit is configured to drive the first sub-pixel and the second sub-pixel to emit light alternately.

2. The display panel according to claim 1, characterized in that: The first sub-pixel includes a first electrode, a first light-emitting material layer, and a second electrode sequentially stacked in a direction away from the substrate, and the first sub-pixel includes a third electrode, a second light-emitting material layer, and a fourth electrode sequentially stacked in a direction away from the substrate; Preferably, the thickness of the fourth electrode is greater than the thickness of the second electrode; Preferably, the thickness of the second electrode is in the range of The thickness of the fourth electrode is in the range of Preferably, the material of the fourth electrode is the same as that of the second electrode; Preferably, the fourth electrode is electrically connected to the second electrode; Preferably, the fourth electrode is continuous with the second electrode.

3. The display panel according to claim 2, characterized in that: The light transmittance of the third electrode is not less than 20%; Preferably, the third electrode is a transparent electrode; Preferably, the thickness of the third electrode is smaller than the thickness of the first electrode; Preferably, the material of the third electrode includes at least one of indium tin oxide, indium zinc oxide and zinc oxide.

4. The display panel according to claim 2, characterized in that: The fourth electrode is electrically connected to the second electrode; The driving circuit comprises: A first driving subcircuit, configured to provide a driving current to the first electrode; A second driving subcircuit, used for providing a driving current to the third electrode; an AC subcircuit, used for alternately inputting positive and negative voltages to the first electrode and alternately inputting positive and negative voltages to the third electrode, and at the same time, the voltage polarities inputted by the AC subcircuit to the first electrode and the third electrode are opposite; Alternatively, the driving circuit comprises: a fourth driving subcircuit, electrically connected to the first electrode and the third electrode; Preferably, the fourth driving subcircuit outputs an AC signal to the first electrode or the third electrode; Preferably, the luminous colors of the first sub-pixel and the second sub-pixel are the same or different.

5. The display panel according to claim 2, characterized in that: The display panel comprises: A pixel definition layer, disposed on one side of the substrate, the pixel definition layer at least having a first opening and a second opening, the first sub-pixel being disposed in the first opening, and the second sub-pixel being disposed in the second opening; Preferably, the first sub-pixel also includes a first common layer and a second common layer, the first common layer is located between the first electrode and the first light-emitting material layer, the second common layer is located between the first light-emitting material layer and the second electrode, the second sub-pixel includes a third common layer and a fourth common layer, the third common layer is located between the third electrode and the second light-emitting material layer, the fourth common layer is located between the second light-emitting material layer and the fourth electrode, wherein the first common layer and the third common layer are continuous and uninterrupted, and / or the second common layer and the fourth common layer are continuous and uninterrupted.

6. The display panel according to claim 1, characterized in that: The display panel further includes: a connection layer, located between the driving layer and the light-emitting layer, comprising a first wiring and a second wiring, wherein the first wiring connects the first sub-pixel and the driving circuit, and the second wiring connects the second sub-pixel and the driving circuit, wherein the transmittance of the second wiring is greater than the transmittance of the first wiring; Preferably, the light transmittance of the connection layer located within the projection range of the second sub-pixel is greater than the light transmittance of the connection layer located within the projection range of the first sub-pixel; Wherein, at least the second wiring located within the light emitting range of the second sub-pixel is transparently arranged; Preferably, the second wiring is entirely transparent; Preferably, the material of the second wiring includes at least one of indium tin oxide, indium zinc oxide, and zinc oxide; Preferably, the second wiring and the orthographic projection of the second sub-pixel on the substrate do not overlap.

7. The display panel according to claim 1, characterized in that: The light transmittance of the driving layer within the projection range of the second sub-pixel is greater than the light transmittance of the driving layer within the projection range of the first sub-pixel; Preferably, the driving layer located within the projection range of the second sub-pixel is transparently arranged; Preferably, the material of the driving layer located within the projection range of the second sub-pixel includes transparent organic glue; Preferably, the driving circuit and the orthographic projection of the second sub-pixel on the substrate do not overlap.

8. The display panel according to claim 1, characterized in that: The display panel further includes: a planarization layer, disposed between the driving layer and the light-emitting layer, wherein a light transmittance of the planarization layer within a projection range of the second sub-pixel is greater than a light transmittance of the planarization layer within a projection range of the first sub-pixel; Preferably, the planarization layer at least within the projection range of the second sub-pixel is transparent; Preferably, the planarization layer is entirely transparent.

9. The display panel according to claim 1, characterized in that: The driving circuit comprises: a third driving sub-circuit; a gating subcircuit, electrically connected to the third driving subcircuit and the first subpixel and the second subpixel, the gating subcircuit being configured to enable the third driving subcircuit to drive the first subpixel and the second subpixel to emit light in a time-sharing manner; Preferably, the gating subcircuit comprises: a first switch sub-circuit, a first end of which is electrically connected to the third driving sub-circuit, and a second end of which is electrically connected to the first sub-pixel; a second switch sub-circuit, a first end of which is electrically connected to the third driving sub-circuit, and a second end of which is electrically connected to the second sub-pixel; A first control line, electrically connected to a control end of the first switch sub-circuit, and used to control the first switch sub-circuit to be turned on or off; A second control line, electrically connected to a control end of the second switch sub-circuit, and used to control the second switch sub-circuit to be turned on or off; Preferably, the first switch subcircuit comprises a first switch tube, a first end of which is electrically connected to the third drive subcircuit, a second end of which is electrically connected to the first subpixel, and a control end of which is electrically connected to the first control line; Preferably, the second switch subcircuit comprises a second switch tube, a first end of which is electrically connected to the third drive subcircuit, a second end of which is electrically connected to the second sub-pixel, and a control end of which is electrically connected to the second control line.

10. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 9.

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