Display panel and driving method therefor, and display device

Abstract

The present application provides a display panel and a driving method therefor, and a display device. The display panel comprises a substrate, and first light-emitting elements and second light-emitting elements which are located on one side of the substrate; first grooves used for accommodating the first light-emitting elements and second grooves for accommodating the second light-emitting elements are further formed on the side of the substrate close to the first light-emitting elements and the second light-emitting elements; the depth of the first grooves in a first direction is greater than the depth of the second grooves in the first direction; and the first direction is the direction where the substrate points to the first light-emitting elements and the second light-emitting elements. In the present application, when an organic light-emitting layer located in the first grooves emits light, the light emitting at a large angle can be blocked by means of the limitation of the groove structure, so that the light leakage phenomenon of the light on the side of the organic light-emitting layer away from the substrate is avoided, resulting in emitting of light at a large angle, and thus affecting the display effect, thereby improving the peep-proof effect of the display panel in the peep-proof mode.

Description

Display panel, driving method thereof, and display device Technical Field

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

[0002] Mobile phones and other display products have become an integral part of our daily lives. In some scenarios, people need to share their screens with others to exchange information, a function known as a shared state. In other scenarios, when browsing important or confidential content on mobile phones and other display products, they need their devices to transmit the displayed information only to the user holding the screen, while preventing others from viewing it. This is known as an anti-peeping state. Therefore, the ability to flexibly switch between a shared state and an anti-peeping state has become a growing functional requirement for mobile phones and other display products.

[0003] Summary of the Invention

[0004] In response to the shortcomings of the related art, the present application proposes a display panel, a driving method thereof, and a display device to solve the problem in the related art of how to improve the anti-peeping effect of the display panel in the anti-peeping mode.

[0005] An embodiment of the present application provides a display panel, including a substrate and a first light-emitting element and a second light-emitting element, wherein the first light-emitting element and the second light-emitting element are located on one side of the substrate; a first groove for accommodating the first light-emitting element and a second groove for accommodating the second light-emitting element are further provided on a side of the substrate close to the first light-emitting element and the second light-emitting element, the depth of the first groove along the first direction is greater than the depth of the second groove along the first direction, and the first direction is the direction in which the substrate points to the first light-emitting element and the second light-emitting element.

[0006] The display panel provided in this embodiment has a first groove for accommodating the first light-emitting element and a second groove for accommodating the second light-emitting element on the side of the substrate facing the first light-emitting element and the second light-emitting element, respectively, so that the depth of the first groove is greater than the depth of the second groove. This can be achieved by reducing the viewing angle range of the display panel in the anti-peeping mode through the sunken first groove on the display panel. When the organic light-emitting layer located in the first groove emits light, the light emitted at a large angle is blocked by the restriction of the groove structure, thereby avoiding light leakage on the side of the organic light-emitting layer away from the substrate, resulting in large-angle light emission affecting the display effect, which can further enhance the anti-peeping effect and improve the anti-peeping effect of the display panel in the anti-peeping mode.

[0007] In one embodiment, the substrate is further provided with a first groove for accommodating the first light-emitting element and a second groove for accommodating the second light-emitting element, the depth of the first groove along the first direction is greater than the depth of the second groove along the first direction, and the first direction is the direction in which the substrate points to the first light-emitting element and the second light-emitting element.

[0008] In one embodiment, the ratio between the depth of the first groove along the first direction and the depth of the second groove along the first direction is 2 to 8;

[0009] In one embodiment, the first groove has a concave surface with its opening facing the first direction, and the maximum angle formed between a line connecting any two points in the concave surface and a plane perpendicular to the first direction is not less than 30° and not more than 60°.

[0010] In one embodiment, the display panel further comprises: an isolation structure; the isolation structure is at least partially located on a side of the first light-emitting element and the second light-emitting element away from the substrate. In a plane perpendicular to the first direction, the isolation structure is at least partially located between the first light-emitting element and the second light-emitting element, and an orthographic projection of the isolation structure on the substrate does not overlap with an orthographic projection of the first groove on the substrate.

[0011] In one embodiment, the first light-emitting element and the second light-emitting element each include a first electrode, an organic light-emitting layer, and a second electrode sequentially stacked on the substrate; along a plane perpendicular to the first direction, an interface region is formed between the first light-emitting element and the second light-emitting element, and the interface region includes a first interface region and a second interface region, wherein:

[0012] The isolation structure is provided in the first boundary region, and the isolation structure isolates the first electrode, the organic light-emitting layer, and the second electrode of the first light-emitting element from the first electrode, the organic light-emitting layer, and the second electrode of the second light-emitting element respectively;

[0013] The isolation structure is not provided in the second boundary region, and the first light-emitting element and the second light-emitting element are electrically connected to the second electrode via the second boundary region.

[0014] In one embodiment, a ratio between a height of the isolation structure along the first direction and a depth of the first groove along the first direction is 0.5 to 1.

[0015] In one embodiment, the isolation structure is an integrated structure, and the projection area of ​​the orthographic projection of the isolation structure on the substrate increases gradually along the first direction;

[0016] In one embodiment, the isolation structure includes a first isolation portion and a second isolation portion stacked in sequence on the substrate, the orthographic projection of the end surface of the first isolation portion facing the second isolation portion on the substrate is located within the orthographic projection of the second isolation portion on the substrate, and the projected area of ​​the orthographic projection of the end surface of the first isolation portion facing the second isolation portion on the substrate is smaller than the projected area of ​​the orthographic projection of the second isolation portion on the substrate.

[0017] In one embodiment, the display panel further includes a light-shielding structure, which is located on a side of the isolation structure away from the substrate, and the orthographic projection of the light-shielding structure on the substrate at least partially overlaps with the orthographic projection of the isolation structure on the substrate, and a light-emitting blind area is formed between the light-shielding structure and the isolation structure, and the light-emitting blind area is located outside the angle range of the first viewing angle.

[0018] In one embodiment, the height of the isolation structure along the first direction is smaller than the height of the light shielding structure along the first direction;

[0019] In one embodiment, a width of the isolation structure in a direction perpendicular to the first direction is greater than a width of the light shielding structure in a direction perpendicular to the first direction.

[0020] In one embodiment, the display panel further includes a first dimming structure, the orthographic projection of the first dimming structure on the substrate at least partially overlaps with the angular range of the first viewing angle, the first dimming structure is located on a side of the first light-emitting element away from the substrate, and the first dimming structure includes a first refractive layer and a second refractive layer sequentially stacked on the substrate, and the refractive index of the first refractive layer is less than the refractive index of the second refractive layer.

[0021] In one embodiment, the first dimming structure is at least partially located in the first groove.

[0022] In one embodiment, the first dimming structure is located between the isolation structure and the light shielding structure.

[0023] In one embodiment, the first dimming structure is located on a side of the light shielding structure away from the substrate.

[0024] In one embodiment, the display panel further includes a second dimming structure, the second dimming structure includes a lens structure layer, and the orthographic projection of the second dimming structure on the substrate at least partially overlaps with the orthographic projection of the first light-emitting element on the substrate, wherein,

[0025] In one embodiment, the second dimming structure is at least partially located in the first groove.

[0026] In one embodiment, the second dimming structure is located between the isolation structure and the light shielding structure.

[0027] In one embodiment, the second dimming structure is located between the light shielding structure and the first dimming structure.

[0028] In one embodiment, the second dimming structure is located on a side of the first dimming structure away from the substrate.

[0029] In one embodiment, the isolation structure and / or the light-shielding structure are made of light-absorbing material or light-reflecting material.

[0030] The present application further provides a method for driving a display panel, for driving the display panel as described in the aforementioned embodiment, the method comprising:

[0031] In the anti-peeping mode, controlling the first light-emitting element to emit light;

[0032] In the sharing mode, the second light emitting element is controlled to emit light.

[0033] In one embodiment, in the sharing mode, the first light emitting element is controlled to emit light while the second light emitting element is controlled to emit light.

[0034] The present application also provides a display device, comprising the display panel as described in the aforementioned embodiment.

[0035] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] FIG1 is a schematic diagram showing a film structure of a display panel provided in an embodiment of the present application;

[0038] FIG2 is a schematic diagram showing a layout of a display panel provided in an embodiment of the present application;

[0039] FIG3 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0040] FIG4 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0041] FIG5 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0042] FIG6 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application;

[0043] FIG7 is a schematic diagram showing a film structure of another display panel provided in an embodiment of the present application;

[0044] FIG8 is a schematic diagram showing a film layer structure of another display panel provided in an embodiment of the present application.

[0045] In the figure: 1-substrate; 2-planarization layer; 201-first groove; 202-second groove; 3-first electrode; 4-pixel definition layer; 5-isolation structure; 51-first isolation part; 52-second isolation part; 6-organic light-emitting layer; 7-second electrode; 100-first light-emitting element; 200-second light-emitting element; 8-light-shielding structure; 9-first dimming structure; 91-first refraction layer; 92-second refraction layer; 10-second dimming structure; LA1-first light-emitting area; LA2-second light-emitting area; CA-junction area; CA1-first junction area; CA2-second junction area; DA-light emission blind area. DETAILED DESCRIPTION

[0046] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0047] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0048] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or region, it may mean that it is directly on the other layer or region, or that other layers or regions are included between it and the other layer or region. Furthermore, if the component is turned over, the layer or region will be "below" or "beneath" the other layer or region.

[0049] Mobile phones and other display products have become an integral part of our daily lives. In some scenarios, people need to share their screens with others to exchange information, a function known as a shared state. In other scenarios, when browsing important or confidential content on mobile phones and other display products, they need their devices to transmit the displayed information only to the user holding the screen, while preventing others from viewing it. This is known as an anti-spy state. Therefore, the ability to flexibly switch between a shared state and an anti-spy state has become a growing functional requirement for mobile phones and other display products.

[0050] The display panel, driving method thereof, and display device provided in this application are intended to solve the above technical problems in related technologies.

[0051] The display panel, its driving method, and the display device in the embodiments of the present application are described in detail below with reference to the accompanying drawings. In the absence of conflict, the features in the following embodiments can complement or be combined with each other.

[0052] An embodiment of the present application provides a display panel, as shown in Figure 1, including a substrate 1 and a first light-emitting element 100 and a second light-emitting element 200 located on one side of the substrate 1, wherein a side of the substrate 1 close to the first light-emitting element 100 and the second light-emitting element 200 is further provided with a first groove 201 for accommodating the first light-emitting element 100 and a second groove 202 for accommodating the second light-emitting element 200, and the depth of the first groove 201 along the first direction x is greater than the depth of the second groove 202 along the first direction x, and the first direction x is the direction from the substrate 1 to the first light-emitting element 100 and the second light-emitting element 200.

[0053] In this embodiment, a first groove 201 for accommodating the first light-emitting element 100 and a second groove 202 for accommodating the second light-emitting element 200 are respectively provided on the side of the substrate 1 facing the first light-emitting element 100 and the second light-emitting element 200. The depth of the first groove 201 is greater than the depth of the second groove 202. This can achieve the goal of reducing the viewing angle range of the display panel in the anti-peeping mode by using the sunken first groove 201 on the display panel. When the organic light-emitting layer 6 located in the first groove 210 emits light, the groove structure is used to limit and block the light emitted at a large angle, thereby avoiding light leakage on the side of the organic light-emitting layer 6 away from the substrate 1, resulting in large-angle light emission affecting the display effect. This can further enhance the anti-peeping effect and improve the anti-peeping effect of the display panel in the anti-peeping mode.

[0054] In some embodiments, the display mode of the display panel includes an anti-peeping mode and a sharing mode. In the anti-peeping mode, the first light-emitting element 100 emits light at a first viewing angle. In the sharing mode, the second light-emitting element 200 emits light at a second viewing angle. The first viewing angle is smaller than the second viewing angle.

[0055] In the display panel provided in this embodiment, in anti-peeping mode, the first light-emitting element 100 emits light to form a first viewing angle, also known as a normal viewing angle, so that the display panel only emits light to the user facing the holder, with a narrow visual range, which can protect user privacy. In sharing mode, the second light-emitting element 200 emits light to form a second viewing angle, also known as a wider viewing angle, which can give the display panel a larger viewing angle range, enabling multiple people to share display information at the same time. The display panel in this embodiment can flexibly switch between anti-peeping mode and sharing mode, meeting the diverse display needs of daily life and office work, and improving the user experience.

[0056] Considering that display products such as mobile phones are personal items in daily life, the demand for displaying directly from the user's perspective is more frequent, whether in sharing mode or anti-peeping mode. Therefore, in some embodiments, as shown in FIG1 , the projected area of ​​the orthographic projection of the first light-emitting element 100 on the substrate 1 is larger than the projected area of ​​the orthographic projection of the second light-emitting element 200 on the substrate 1. In other words, the light-emitting area of ​​the first light-emitting element 100 is larger than the light-emitting area of ​​the second light-emitting element 200, which can improve the light output brightness within the light output range of the first viewing angle, i.e., the orthographic viewing angle, and optimize the display effect of the display panel at the first viewing angle.

[0057] In some embodiments, as shown in FIG1 , the structure of at least part of the first light-emitting element 100 is closer to the substrate 1 than the second light-emitting element 200 , that is, the structure of at least part of the first light-emitting element 100 is farther away from the holder than the second light-emitting element 200 . This makes it possible that in the anti-peeping mode, the light emitting path of the first light-emitting element 100 is longer, resulting in a relatively small first viewing angle, which is beneficial for anti-peeping.

[0058] In some embodiments, the light emitting color of the first light-emitting element 100 is the same as the light emitting color of the second light-emitting element 200. When an RGB pixel lighting method is used, the color of the first light-emitting element 100 and the second light-emitting element 200 is any one of red, green, or blue. When a WRGB pixel lighting method is used, the color of the first light-emitting element 100 and the second light-emitting element 200 is any one of red, green, blue, or white.

[0059] In some embodiments, the first viewing angle can be set according to the user's frequency of use of the viewing angle. In this embodiment, only an example of the first viewing angle being a front viewing angle is given. Those skilled in the art can flexibly set it to a side viewing angle, a top viewing angle or a top viewing angle, without being limited thereto.

[0060] In some embodiments, the first light-emitting element 100 can also emit light in the sharing mode to avoid the problem of uneven brightness caused by the obvious brightness difference in the light-emitting areas where the first light-emitting element 100 is located and the second light-emitting element 200 is illuminated, so as to further optimize the display effect.

[0061] In some embodiments, as shown in Figure 1, the first light-emitting element 100 and the second light-emitting element 200 each include a first electrode 3, an organic light-emitting layer 6, and a second electrode 7. One side of the first electrode 3 is connected to a pixel driving circuit (not shown) corresponding to the light-emitting element, the other side of the first electrode 3 is connected to one side of the organic light-emitting layer 6, and the side of the organic light-emitting layer 6 facing away from the first electrode 3 is connected to the second electrode 7. Driven by the pixel driving circuit, the organic light-emitting layer 6 emits light using the light-emitting properties of the organic material. In this embodiment, the first electrode 3 is an anode and the second electrode 7 is a cathode. In other embodiments, the first electrode 3 is a cathode and the second electrode 7 is an anode.

[0062] In some embodiments, the organic light-emitting layer 6 may include an emitting layer (EML), and any one or more of the following: a hole injection layer (HIL), a hole transport layer (HTL), a hole blocking layer (HBL), an electron blocking layer (EBL), an electron injection layer (EIL), and an electron transport layer (ETL).

[0063] In some embodiments, substrate 1 can be a rigid substrate or a flexible substrate. The rigid substrate can be made of glass or quartz, while the flexible substrate can be made of a polymer material such as polyimide (PI), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or graphite. Substrate 1 can be a single-layer structure or a laminated structure composed of inorganic and organic material layers, which is not limited in this application.

[0064] In some embodiments, the first light-emitting element 100 and the second light-emitting element 200 are any one or more of an organic light-emitting diode (OLED), an active matrix organic light-emitting diode (AMOLED), a passive matrix organic light-emitting diode (PMOLED), a quantum dot organic light-emitting diode (QLED), a micro light-emitting diode (Micro-LED), and a sub-millimeter light-emitting diode (Mini-LED).

[0065] In some embodiments, since the depth of the first groove 201 is greater than the depth of the second groove 202, compared with the traditional method of using the pixel definition layer 4 to define the light-emitting area of ​​the light-emitting unit and the light-emitting unit along the first direction x, the light-emitting area of ​​the first light-emitting element 100 and the depth of the first electrode 3, the organic light-emitting layer 6 and the second electrode 7 can be flexibly set in this embodiment, so that the light-emitting area of ​​the first light-emitting element 100 is greater than the light-emitting area of ​​the second light-emitting element 200, and the depth of the light-emitting material of the first light-emitting element 100 is greater than the depth of the light-emitting material of the second light-emitting element 200, so as to improve the brightness of the light emitted from the front and optimize the display effect.

[0066] In some embodiments, as shown in FIG. 1 , the display panel further includes a planarization layer 2 located on the substrate 1 near the first light-emitting element 100 and the second light-emitting element 200 , and the first groove 201 is formed in the planarization layer 2 .

[0067] In some embodiments, as shown in FIG1 , the display panel further includes a pixel definition layer 4 located on the planarization layer 2 near the first light-emitting element 100 and the second light-emitting element 200 . The pixel definition layer 4 is provided with a plurality of pixel definition units arranged at intervals, and a second groove 202 is formed between two adjacent pixel definition units.

[0068] In some embodiments, the pixel definition layer 4 may be made of an inorganic insulating material or an organic insulating material. For example, the inorganic insulating material may be silicon nitride, silicon oxide, or silicon oxynitride. The organic insulating material may be polyimide (PI), benzocyclobutene (BCB), or a photoresist.

[0069] In some embodiments, the ratio of the depth of the first groove 201 along the first direction x to the depth of the second groove 202 along the first direction x is 2 to 8. In this embodiment, the depth of the second groove 202 is less than the depth of the first groove 201, so that the second viewing angle formed by the light emitted by the second light-emitting element 200 in the second groove 202 is larger than the first viewing angle formed by the light emitted by the first light-emitting element 100 in the first groove 201. This enables the second light-emitting element 200 to emit light with a wide viewing angle in the sharing mode, thereby achieving a better display effect when the display panel switches between the sharing mode and the anti-peeping mode.

[0070] In some embodiments, the ratio of the depth of the first groove 201 along the first direction x to the depth of the second groove 202 along the first direction x is 4. For example, the depth of the first groove 201 along the first direction x is 4 μm, and the depth of the second groove 202 along the first direction x is 1 μm.

[0071] In some embodiments, as shown in FIG1 , the first groove 201 has a concave surface with its opening facing the first direction x, and a maximum angle α formed between a line connecting any two points in the concave surface and a plane perpendicular to the first direction x is not less than 30° and not greater than 60°.

[0072] In this embodiment, the maximum angle α between the light exiting from the first groove 201 and the plane of the substrate 1 is set to be no less than 30° and no greater than 60°. The maximum angle α is a preset angle value or angle range based on test data and actual needs. By limiting the angle of light exiting from the first groove 201 in this embodiment, it is possible to more comprehensively block all light from a wide viewing angle, achieving comprehensive privacy protection. In one example, the maximum angle α is 45°, achieving a privacy protection effect that limits the display to an angle of 45°.

[0073] In some embodiments, as shown in FIG1 , the orthographic projection of the opening of the first groove 201 on the substrate 1 gradually increases along the first direction x, so that light emitted by the organic light-emitting layer 6 of the light-emitting element is refracted on the sidewall and then emitted at a preset angle, thereby preventing the light from being completely blocked or absorbed, thereby improving the display brightness of the display panel. For example, as shown in FIG1 , the shape of the first groove 201 is an inverted trapezoid, and the orthographic projection area of ​​the end surface of the first groove 201 on the side close to the substrate 1 on the substrate 1 is smaller than the orthographic projection area of ​​the opening of the first groove 201 on the side away from the substrate 1 on the substrate 1.

[0074] In some embodiments, as shown in FIG1 , the display panel further includes an isolation structure 5. The isolation structure 5 is at least partially located on a side of the first light-emitting element 100 and the second light-emitting element 200 away from the substrate 1. In a plane perpendicular to the first direction x, the isolation structure 5 is at least partially located between the first light-emitting element 100 and the second light-emitting element 200, and the orthographic projection of the isolation structure 5 on the substrate 1 does not overlap with the orthographic projection of the first groove 201 on the substrate 1.

[0075] In this embodiment, an isolation structure 5 is added to the display panel. The orthographic projections of the isolation structure 5 and the first recess 201 on the substrate 1 do not overlap, thereby maximizing light emission and preventing light blocking and absorption caused by the bottom of the isolation structure 5. This allows the isolation structure 5, located around the first recess 201, to adjust the light emission angle of the first light-emitting element 100 and increase the brightness of the first light-emitting element 100. Furthermore, the isolation structure 5 is positioned between the first light-emitting element 100 and the second light-emitting element 200, thereby separating the first electrode 3, organic light-emitting layer 6, and second electrode 7 between the first and second light-emitting elements 100, 200. For example, the bottom of the isolation structure 5 directly contacts the upper surface of the planarization layer 2 and at least partially contacts the first electrode 3 of the first and second light-emitting elements 100, 200. Separating the first and second electrodes 3 and 7 of the two light-emitting elements prevents signal interference between the first and second light-emitting elements 100, 200, facilitating independent control of the first and second light-emitting elements 100, 200. Separating the organic light-emitting layers 6 of the two light-emitting elements can avoid crosstalk between the light-emitting materials of the organic light-emitting layers 6 and thus prevent cross-color.

[0076] In some embodiments, the isolation structure 5 is made of PI (polyimide), BCB (benzocyclobutene) or photoresist (Photo Spacer, PS).

[0077] In some embodiments, as shown in FIG1 , an isolation structure 5 is further disposed between two adjacent first light-emitting elements 100 to separate the second electrode 7 and the organic light-emitting layer 6 between the two adjacent first light-emitting elements 100, thereby preventing interference between the signals of the first light-emitting elements 100 or crosstalk between the light-emitting materials of the organic light-emitting layer 6 leading to cross-color. Furthermore, each first light-emitting element 100 shares the same first electrode 3, facilitating simultaneous control of the first light-emitting elements 100, i.e., the isolation structure 5 does not contact the planarization layer 2. Using the isolation structure 5 in this embodiment instead of the pixel definition layer 4 in the conventional structure to separate two adjacent first light-emitting elements 100 or the first light-emitting element 100 and the second light-emitting element 200 can reduce the spacing between the two adjacent first light-emitting elements 100 or the first light-emitting element 100 and the second light-emitting element 200, i.e., the light-emitting elements are positioned closer together, which can correspondingly increase the light-emitting area of ​​the first light-emitting element 100 and the second light-emitting element 200, thereby increasing the aperture ratio of the display panel.

[0078] It should be noted that the isolation structure 5 may not be provided between two adjacent second light-emitting elements 200 to ensure that the light emitted by the second light-emitting elements 200 is emitted at the maximum viewing angle and avoids obstruction by the isolation structure 5. The second light-emitting elements 200 can share the same first electrode 3 to facilitate simultaneous control of the second light-emitting elements 200 on and off, allowing display products such as mobile phones to switch between anti-peeping mode and sharing mode at will.

[0079] In some embodiments, as shown in FIG. 1 and FIG. 2 , FIG. 1 is a cross-sectional view corresponding to the cross-sectional line along the dotted line AA in FIG. 2 . The first light-emitting element 100 is located in the first light-emitting area LA1, and the second light-emitting element 200 is located in the second light-emitting area LA2. The second light-emitting area LA2 at least partially surrounds the first light-emitting area LA1. The first light-emitting element 100 and the second light-emitting element 200 both include a first electrode 3, an organic light-emitting layer 6, and a second electrode 7 sequentially stacked on the substrate 1. Along a plane perpendicular to the first direction x, a junction area CA is formed between the first light-emitting element 100 and the second light-emitting element 200. The junction area CA includes a first junction area CA1 and a second junction area CA2, wherein an isolation structure 5 is provided in the first junction area CA1, and the isolation structure 5 separates the first electrode 3, the organic light-emitting layer 6, and the second electrode 7 of the first light-emitting element 100 from the first electrode 3, the organic light-emitting layer 6, and the second electrode 7 of the second light-emitting element 200 respectively; no isolation structure 5 is provided in the second junction area CA2, and the first light-emitting element 100 and the second light-emitting element 200 are conductively connected to the second electrode 7 through the second junction area CA2.

[0080] In some embodiments, at least part of the second electrodes 7 of the first light-emitting element 100 and the second light-emitting element 200 are anodes, so that the anodes between the first light-emitting element 100 and the second light-emitting element 200 are connected, and the anode voltage can be smoothly loaded onto the second electrode 7 of the first light-emitting element 100 or the second light-emitting element 200, thereby achieving smooth transmission of signals and smooth switching between the anti-peeping mode and the sharing mode.

[0081] In some embodiments, as shown in FIG. 1 , a ratio between a height of the isolation structure 5 along the first direction x and a depth of the first groove 201 along the first direction x is 0.5 to 1.

[0082] In this embodiment, the height of the isolation structure 5 in the first direction x is less than the depth of the first groove 201 in the first direction x. Since the first groove 201 regulates the light emitted by the first light-emitting element 100, a relatively small isolation structure 5 can be provided to perform secondary regulation of the emitted light after the regulation or filtering by the first groove 201. Furthermore, when the height of the isolation structure 5 is small, the structural stability of the isolation structure 5 is increased, and the display panel can also be thinned, improving the aesthetics and user experience. For example, the height of the isolation structure 5 in the first direction x is 2-3 μm, and the depth of the first groove 201 in the first direction x is 4-6 μm.

[0083] In some embodiments, as shown in FIG1 , the isolation structure 5 is an integrated structure, and the projected area of ​​the isolation structure 5 on the substrate 1 increases along the first direction x. For example, the isolation structure 5 is an inverted trapezoidal structure. This can isolate the organic light-emitting layer 6 between adjacent first light-emitting elements 100 and between the first light-emitting element 100 and the second light-emitting element 200, thereby preventing crosstalk between pixels.

[0084] In some embodiments, as shown in FIG3 , the isolation structure 5 includes a first isolation portion 51 and a second isolation portion 52 sequentially stacked on the substrate 1. The orthographic projection of the end surface of the first isolation portion 51 facing the second isolation portion 52 on the substrate 1 is located within the orthographic projection of the second isolation portion 52 on the substrate 1. Furthermore, the orthographic projection area of ​​the end surface of the first isolation portion 51 facing the second isolation portion 52 on the substrate 1 is smaller than the orthographic projection area of ​​the second isolation portion 52 on the substrate 1. Exemplarily, the isolation structure 5 is a T-shaped structure. Similar to the aforementioned embodiment, since the width of the first isolation portion 51 is smaller than the width of the second isolation portion 52, it is possible to isolate the organic light-emitting layer 6 between adjacent first light-emitting elements 100 and between the first light-emitting element 100 and the second light-emitting element 200, thereby avoiding crosstalk between pixels.

[0085] In some embodiments, as shown in FIG. 1 or FIG. 3 , the height of the isolation structure 5 is greater than the height of the pixel definition layer 4 .

[0086] In some embodiments, as shown in FIG3 , the orthographic projection of the second isolation portion 52 of the isolation structure 5 on the substrate 1 overlaps with the adjacent first light-emitting element 100 and the orthographic projection of the first light-emitting element 100 on the substrate 1 .

[0087] In some embodiments, as shown in FIG1 or 3 , the surface of the isolation structure 5 is further covered with an organic light-emitting layer 6 and a second electrode 7 that are disconnected from the first light-emitting element 100. For example, the upper surface and two side surfaces of the second isolation portion 52 of the isolation structure 5 are further covered with an organic light-emitting layer 6 and a second electrode 7 that are disconnected from the first light-emitting element 100.

[0088] In some embodiments, as shown in Figure 1 or Figure 3, the display panel also includes a shading structure 8, which is located on the side of the isolation structure 5 away from the substrate 1. The orthographic projection of the shading structure 8 on the substrate 1 at least partially overlaps with the orthographic projection of the isolation structure 5 on the substrate 1. A light emitting blind area DA is formed between the shading structure 8 and the isolation structure 5, and the light emitting blind area DA is located outside the angle range of the first viewing angle.

[0089] In this embodiment, a shading structure 8 is provided on the side of the isolation structure 5 away from the substrate 1. The light exit blind area DA between the shading structure 8 and the isolation structure 5 can be used to fill other functional film layers or be filled with a planarizing material, thereby eliminating the need to lay the shading structure 8 in the light exit blind area DA, thereby saving material costs.

[0090] In some embodiments, as shown in FIG1 or FIG3 , the height of the isolation structure 5 along the first direction x is less than the height of the light shielding structure 8 along the first direction x. In this embodiment, the height of the light shielding structure 8 is higher, which can compensate for the regulation effect of light that may be refracted through the isolation structure 5, further improving the anti-privacy effect in the anti-privacy mode.

[0091] In some embodiments, as shown in FIG1 or FIG3 , the width of the isolation structure 5 in a direction perpendicular to the first direction x is greater than the width of the light shielding structure 8 in the direction perpendicular to the first direction x. In this embodiment, the width of the isolation structure 5 is greater than the width of the light shielding structure 8 to adjust or absorb potentially diffused light at the initial stage of light emission, thereby enhancing privacy protection.

[0092] In some embodiments, as shown in FIG4 , the display panel further includes a first dimming structure 9 , whose orthographic projection on substrate 1 at least partially overlaps the angular range of the first viewing angle. The first dimming structure 9 is located on a side of the first light-emitting element 100 away from substrate 1 . The first dimming structure 9 includes a first refractive layer 91 and a second refractive layer 92 sequentially stacked on substrate 1 , with the refractive index of the first refractive layer 91 being lower than the refractive index of the second refractive layer 92 . Refraction at the interface between the first refractive layer 91 and the second refractive layer 92 can further narrow the angular range of the first viewing angle of light emitted from the first light-emitting element 100 , thereby enhancing the anti-peeping effect of the display panel in anti-peeping mode.

[0093] In some embodiments, the refractive index of the first refractive layer 91 is 1.4-1.6, and the refractive index of the second refractive layer 92 is 1.7-1.9.

[0094] It should be noted that the first dimming structure 9 may be a diffusion structure, and the diffusion structure includes an internal extraction structure (IES) or an external extraction structure (EES).

[0095] Specifically, in some embodiments, as shown in FIG5 , the first dimming structure 9 is at least partially located in the first groove 201 and is in direct contact with the organic light-emitting layer 6 of the first light-emitting element 100, so that the first dimming structure 9 converges the outgoing light. In other embodiments (not shown in the figures), the first dimming structure 9 is located between the isolation structure 5 and the shading structure 8, and converges the light regulated by the isolation structure 5. In some embodiments, as shown in FIG4 , the first dimming structure 9 is located on the side of the shading structure 8 away from the substrate 1, and converges the light regulated by the shading structure 8. The above embodiments can be arbitrarily combined without conflict to further narrow the viewing angle and enhance the anti-peeping effect.

[0096] In some embodiments, as shown in FIG6 , the display panel further includes a second dimming structure 10, which includes a lens structure layer. The orthographic projection of the second dimming structure 10 on the substrate 1 at least partially overlaps with the orthographic projection of the first light-emitting element 100 on the substrate 1. This further reduces the angular range of the first viewing angle of the light emitted by the first light-emitting element 100, thereby improving the privacy protection effect of the display panel in the privacy protection mode.

[0097] In some embodiments, as shown in FIG6 , the lens structure layer includes a micro lens array (MLA) arranged on a plane perpendicular to the first direction x, and the micro lens array includes a plurality of convex lenses. In some embodiments, the convex lenses are spherical lenses, aspherical lenses, cylindrical lenses, or prisms.

[0098] Specifically, similar to the first dimming structure 9, in some embodiments, as shown in FIG7 , the second dimming structure 10 is at least partially located within the first groove 201. In other embodiments (not shown), the second dimming structure 10 is located between the isolation structure 5 and the light shielding structure 8. In still other embodiments (not shown), the second dimming structure 10 is located between the light shielding structure 8 and the first dimming structure 9. In still other embodiments, as shown in FIG6 or FIG8 , the second dimming structure 10 is located on a side of the first dimming structure 9 away from the substrate 1.

[0099] In some embodiments, the isolation structure 5 and / or the light shielding structure 8 are made of a light-absorbing material or a light-reflecting material, which can block the emission of light with a large viewing angle by absorption and / or reflection, thereby further improving the anti-peeping effect.

[0100] In some embodiments, the light-absorbing material includes at least one of an acrylate material and a polyimide material. Acrylate materials include at least one of methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, n-propyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate, isooctyl acrylate, decyl acrylate, 2-hydroxyethyl acrylate, and 2-hydroxypropyl acrylate; polyimide materials include at least one of an aliphatic polyimide, an aromatic polyimide, and a polyetherimide. These materials can efficiently absorb light emitted from a wide viewing angle and block light emitted from a wide viewing angle by absorption. At the same time, they are inexpensive, which is conducive to actual preparation processes and industrial production. In actual processes, the specific material of the light-absorbing material is selected based on actual needs.

[0101] In some embodiments, the light shielding structure 8 may be made of metal, such as silver, aluminum, or platinum, or an insulating material. It should be noted that the isolation structure 5 is made of an insulating material to prevent signal crosstalk between the light emitting elements on both sides of the isolation structure 5 .

[0102] This embodiment also provides a display panel driving method for driving the display panel in the above embodiment.

[0103] The driving method specifically includes: in the anti-peeping mode, controlling the first light-emitting element 100 to emit light; in the sharing mode, controlling the second light-emitting element 200 to emit light.

[0104] In some embodiments, in the sharing mode, the first light emitting element 100 is controlled to emit light while the second light emitting element 200 is controlled to emit light, thereby preventing uneven brightness of the display panel.

[0105] The present application also provides a display device, comprising the display panel provided in the aforementioned embodiment. The display device has the advantages of the display panel in the aforementioned embodiment, and therefore will not be described in detail here.

[0106] It should be noted that the display device can be any device that displays images, whether in motion (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is contemplated that embodiments may be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., speedometer displays, etc.), navigation systems, cockpit controls and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0107] The above embodiments of the present application can complement each other if no conflict occurs.

[0108] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0109] The terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on this application.

[0110] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0111] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present application are indicated by the claims.

[0112] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A display panel, characterized in that: include: substrate; A first light emitting element and a second light emitting element are located on one side of the substrate; A first groove for accommodating the first light-emitting element and a second groove for accommodating the second light-emitting element are also provided on one side of the substrate close to the first light-emitting element and the second light-emitting element, and the depth of the first groove along the first direction is greater than the depth of the second groove along the first direction, and the first direction is the direction in which the substrate points to the first light-emitting element and the second light-emitting element.

2. The display panel according to claim 1, characterized in that: A ratio between a depth of the first groove along the first direction and a depth of the second groove along the first direction is 2 to 8; And / or, the first groove has a concave surface with its opening direction facing the first direction, and the maximum angle formed between a line connecting any two points in the concave surface and a plane perpendicular to the first direction is not less than 30° and not more than 60°.

3. The display panel according to claim 1, characterized in that: The display panel further comprises: an isolation structure; the isolation structure is at least partially located on a side of the first light emitting element and the second light emitting element away from the substrate; On a plane perpendicular to the first direction, the isolation structure is at least partially located between the first light-emitting element and the second light-emitting element, and an orthographic projection of the isolation structure on the substrate does not overlap with an orthographic projection of the first groove on the substrate.

4. The display panel according to claim 3, characterized in that: The first light-emitting element and the second light-emitting element each include a first electrode, an organic light-emitting layer, and a second electrode sequentially stacked on the substrate, and an interface region is formed between the first light-emitting element and the second light-emitting element on a plane perpendicular to the first direction, and the interface region includes a first interface region and a second interface region, wherein: The isolation structure is provided in the first boundary region, and the isolation structure isolates the first electrode, the organic light-emitting layer, and the second electrode of the first light-emitting element from the first electrode, the organic light-emitting layer, and the second electrode of the second light-emitting element respectively; The isolation structure is not provided in the second boundary region, and the first light-emitting element and the second light-emitting element are electrically connected to the second electrode via the second boundary region.

5. The display panel according to claim 3, characterized in that: A ratio between a height of the isolation structure along the first direction and a depth of the first groove along the first direction is 0.5 to 1.

6. The display panel according to claim 3, characterized in that: The isolation structure is an integrated structure, and the projection area of ​​the orthographic projection of the isolation structure on the substrate increases gradually along the first direction; Alternatively, the isolation structure includes a first isolation portion and a second isolation portion stacked in sequence on the substrate, the orthographic projection of an end face of the first isolation portion facing the second isolation portion on the substrate is located within the orthographic projection of the second isolation portion on the substrate, and the projection area of ​​the orthographic projection of the end face of the first isolation portion facing the second isolation portion on the substrate is smaller than the projection area of ​​the orthographic projection of the second isolation portion on the substrate.

7. The display panel according to claim 3, characterized in that: The display panel also includes a shading structure, which is located on a side of the isolation structure away from the substrate, and the orthographic projection of the shading structure on the substrate at least partially overlaps with the orthographic projection of the isolation structure on the substrate, and a light emitting blind area is formed between the shading structure and the isolation structure, and the light emitting blind area is located outside the angle range of the first viewing angle.

8. The display panel according to claim 7, characterized in that: The height of the isolation structure along the first direction is smaller than the height of the light shielding structure along the first direction; And / or, a width of the isolation structure in a direction perpendicular to the first direction is greater than a width of the light shielding structure in a direction perpendicular to the first direction.

9. The display panel according to claim 7, characterized in that: The display panel further includes a first dimming structure, wherein an orthographic projection of the first dimming structure on the substrate at least partially overlaps with an angle range of the first viewing angle, the first dimming structure is located on a side of the first light-emitting element away from the substrate, and the first dimming structure includes a first refractive layer and a second refractive layer sequentially stacked on the substrate, and a refractive index of the first refractive layer is less than a refractive index of the second refractive layer; wherein, The first dimming structure is at least partially located in the first groove; And / or, the first dimming structure is located between the isolation structure and the shading structure; And / or, the first dimming structure is located on a side of the light shading structure away from the substrate.

10. The display panel according to claim 9, characterized in that: The display panel further includes a second dimming structure, the second dimming structure includes a lens structure layer, and the orthographic projection of the second dimming structure on the substrate at least partially overlaps with the orthographic projection of the first light-emitting element on the substrate, wherein: The second dimming structure is at least partially located in the first groove; And / or, the second dimming structure is located between the isolation structure and the light shielding structure; And / or, the second dimming structure is located between the light shading structure and the first dimming structure; And / or, the second dimming structure is located on a side of the first dimming structure away from the substrate.

11. The display panel according to claim 7, characterized in that: The isolation structure and / or the light-shielding structure are made of light-absorbing material or light-reflecting material.

12. A method for driving a display panel, characterized in that: Used to drive the display panel according to any one of claims 1 to 11, the driving method comprising: In the anti-peeping mode, controlling the first light-emitting element to emit light; In the sharing mode, the second light emitting element is controlled to emit light.

13. The method for driving a display panel according to claim 12, wherein: In the sharing mode, the first light emitting element is controlled to emit light while the second light emitting element is controlled to emit light.

14. A display device, characterized in that: Comprising the display panel according to any one of claims 1 to 11.

Images