Display panel and display device

Abstract

The invention discloses a display panel and a display device, relates to the technical field of display, and can improve the light emitting efficiency of a light emitting device. The display panel comprises a driving substrate and a light-emitting device layer, the light-emitting device layer is arranged on one side of the driving substrate, the driving substrate comprises a pixel circuit, and the light-emitting device layer comprises a plurality of light-emitting devices; the light-emitting device comprises a first electrode, a light-emitting layer, a pixel defining layer and a second electrode, the pixel defining layer covers the edge of the first electrode, the pixel defining layer comprises a plurality of pixel openings, the light-emitting layer is arranged in the pixel openings, the light-emitting layer is arranged between the first electrode and the second electrode, and the first electrode is electrically connected with the pixel circuit; the light-emitting device layer comprises a reflection structure, the reflection structure is provided with at least two reflection surfaces, the at least two reflection surfaces belong to different planes, and the extension surfaces of the reflection surfaces intersect with the driving substrate; the reflection structure is arranged on the inner wall of the pixel opening, or the reflection structure is embedded in the pixel defining layer.

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] At present, with the continuous development of display technology, the application of OLED (Organic Light-Emitting Diode) display panels is becoming more and more widespread. In OLED display products, light-emitting devices serve as display pixels, and the light emitted can be used for picture display. Usually, light-emitting devices have a microcavity effect, and some light cannot be emitted in the microcavity of the light-emitting device, resulting in a waste of light and affecting the light extraction efficiency of the light-emitting device. Summary of the invention

[0003] Embodiments of the present application provide a display panel and a display device, which can improve the light extraction efficiency of a light-emitting device.

[0004] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0005] A driving substrate and a light-emitting device layer, wherein the light-emitting device layer is arranged on one side of the driving substrate, the driving substrate includes a pixel circuit, and the light-emitting device layer includes a plurality of light-emitting devices;

[0006] The light-emitting device includes a first electrode, a light-emitting layer, a pixel defining layer, and a second electrode, wherein the pixel defining layer covers an edge of the first electrode, the pixel defining layer includes a plurality of pixel openings, the light-emitting layer is disposed in the pixel openings, the light-emitting layer is disposed between the first electrode and the second electrode, an orthographic projection of the pixel opening on a driving substrate falls within an orthographic projection of the first electrode on the driving substrate, and the first electrode is electrically connected to a pixel circuit;

[0007] The light emitting device layer includes a reflective structure, the reflective structure has at least two reflective surfaces, the at least two reflective surfaces belong to different planes, and the extended surfaces of the reflective surfaces intersect with the driving substrate;

[0008] The reflective structure is arranged on the inner wall of the pixel opening, or the reflective structure is embedded in the pixel defining layer.

[0009] In some embodiments, the orthographic projection of one end of the pixel opening away from the driving substrate on the driving substrate is a first projection, and the orthographic projections of at least two reflective surfaces on the driving substrate fall within the first projection.

[0010] In some embodiments, the reflective structure includes a first stepped structure, the first stepped structure includes at least two stepped surfaces, and the reflective surface includes at least one stepped surface of the first stepped structure.

[0011] In some embodiments, at least one step surface of the first stepped structure is disposed close to the driving substrate, and at least one step surface of the first stepped structure is disposed away from the driving substrate;

[0012] The extended surfaces of at least two step surfaces of the first step structure both intersect with the driving substrate.

[0013] In some embodiments, the first stepped structure includes at least two steps, an extended surface of at least one stepped surface intersects with the driving substrate, and at least one stepped surface is parallel to a plane where the driving substrate is located.

[0014] In some embodiments, the first step structure includes at least three steps, the tips of the at least three steps are coplanar, and the tip of each step is the intersection of two step surfaces; and / or,

[0015] The orthographic projection of the reflective structure on the driving substrate includes a ring shape.

[0016] In some embodiments, the first step structure includes a first step, a second step, a third step, and a fourth step, each step includes a first step surface and a second step surface connected to each other, the first step surface is arranged close to the driving substrate, the second step surface is arranged away from the driving substrate, the second step surface is parallel to the plane where the driving substrate is located, and the reflective surface includes the first step surface;

[0017] The first step is arranged close to the driving substrate, the fourth step is arranged far from the driving substrate, the second step is connected between the first step and the third step, and the third step is connected between the second step and the fourth step;

[0018] The angle between the first step surface of the first step and the plane where the driving substrate is located is a first angle, the angle between the first step surface of the second step and the plane where the driving substrate is located is a second angle, the angle between the first step surface of the third step and the plane where the driving substrate is located is a third angle, and the angle between the first step surface of the fourth step and the plane where the driving substrate is located is a fourth angle;

[0019] The third angle and the fourth angle are both greater than or equal to the first angle, and the third angle and the fourth angle are both greater than the second angle.

[0020] In some embodiments, the maximum size of the first step in the first direction is the first size, the maximum size of the second step in the first direction is the second size, the maximum size of the third step in the first direction is the third size, the maximum size of the fourth step in the first direction is the fourth size, and the first direction is the direction of the connection of two adjacent pixel openings;

[0021] The third size and the fourth size are both larger than the first size and the second size.

[0022] In some embodiments, the first angle ranges from 45° to 50°; and / or,

[0023] The second angle ranges from 45° to 50°; and / or,

[0024] The third angle ranges from 60° to 80°; and / or,

[0025] The fourth angle ranges from 60° to 80°.

[0026] In some embodiments, the first angle is greater than the second angle; and / or,

[0027] The maximum dimension of the first step in the first direction is the first dimension, the maximum dimension of the second step in the first direction is the second dimension, and the first dimension is greater than the second dimension.

[0028] In some embodiments, the maximum dimension of the first step in the second direction is the first thickness, the thickness of the light-emitting layer in the pixel opening in the second direction is the second thickness, the first thickness is less than the second thickness, and the second direction is perpendicular to the plane where the driving substrate is located.

[0029] In some embodiments, the first electrode includes a first electrode portion, and the first electrode portion is connected to the light-emitting layer;

[0030] One end of the reflective structure is electrically connected to the first electrode portion, and the other end of the reflective structure is electrically connected to the pixel circuit through the first electrode via hole;

[0031] The reflective structure and the first electrode portion are an integrated structure.

[0032] In some embodiments, the second electrode is disposed on a side of the light-emitting layer away from the driving substrate;

[0033] The second electrode includes a third electrode portion, and the third electrode portion is connected to the light emitting layer;

[0034] The reflective structure and the second electrode portion are an integrated structure.

[0035] In some embodiments, the reflective structure includes at least two reflective layers;

[0036] At least one reflective layer is disposed on the same layer as the first electrode; and / or,

[0037] At least one reflective layer is disposed on the same layer as the second electrode.

[0038] In some embodiments, the pixel definition layer includes at least two definition layers, and the definition layer far from the driving substrate is coated on the definition layer close to the driving substrate;

[0039] The reflective structure is arranged between the two defining layers.

[0040] In some embodiments, the pixel defining layer includes a first defining layer and a second defining layer, the reflective structure is disposed between the first defining layer and the second defining layer, the second defining layer is disposed on a side of the first defining layer away from the driving substrate, and the reflective structure is disposed in the same layer as the first electrode;

[0041] The first defining layer is provided with a first electrode via hole, the first electrode includes a first electrode portion and a second electrode portion, the second electrode portion is electrically connected to the reflective structure and the pixel circuit respectively through the first electrode via hole, the reflective structure is electrically connected to the first electrode portion, and the first electrode portion is connected to the light-emitting layer;

[0042] The first defining layer includes a second stepped structure, and the first stepped structure covers the second stepped structure.

[0043] In some embodiments, the first step structure includes a first step, a second step, a third step, and a fourth step, each step includes a first step surface and a second step surface connected to each other, the first step surface is arranged close to the driving substrate, the second step surface is arranged away from the driving substrate, the second step surface is parallel to the plane where the driving substrate is located, and the reflective surface includes the first step surface;

[0044] The first step is arranged close to the driving substrate, the fourth step is arranged far from the driving substrate, the second step is connected between the first step and the third step, and the third step is connected between the second step and the fourth step;

[0045] The second defining layer covers the first step surface of the first step; or,

[0046] The second defining layer covers the second step surface of the first step, and the orthographic projection of the second defining layer on the driving substrate does not overlap with the orthographic projection of the first step surface of the first step on the driving substrate.

[0047] In some embodiments, the maximum dimension of the first stepped structure in the first direction is a fifth dimension, the distance between one end of the first stepped structure connected to the first electrode portion and the first electrode via is a sixth dimension, and the fifth dimension is smaller than the sixth dimension.

[0048] According to a second aspect of the embodiments of the present application, a display device is provided, comprising: a display panel in any of the above technical solutions.

[0049] The beneficial effects of this application are:

[0050] At least two non-coplanar reflective surfaces in the reflective structure are used to reflect the light emitted from the light-emitting layer to the pixel defining layer. That is, the reflective structure can reflect the wide-angle light emitted from the light-emitting layer. The reflective surface close to the light-emitting layer in the reflective structure can reflect more light, thereby achieving a gathering effect of the emitted light, so that more wide-angle light is emitted from the display panel, which can improve the light output efficiency of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0052] Figure 2 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0053] Figure 3 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0054] Figure 4 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0055] Figure 5 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0056] Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0057] Figure 7 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0058] Figure 8 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0059] Fig. 9 A schematic partial structural diagram of a display device provided in an embodiment of the present application.

[0060] The reference numerals in the figure represent respectively:

[0061] 100, driving substrate; 200, light emitting device layer; 210, first electrode; 211, first electrode portion; 212, second electrode portion; 213, first electrode via hole; 220, light emitting layer; 230, second electrode; 231, third electrode portion; 240, pixel defining layer; 241, first defining layer; 242, second stepped structure; 243, second defining layer; 244, pixel opening; 245, tip; 246, first projection; 300, reflection structure; 300-1, first reflection surface; 300-2, second reflection surface; 31 0, first step structure; 311, first step; 311-1, first step surface; 311-2, second step surface; 312, second step; 313, third step; 314, fourth step; L1, first light; L2, second light; X, first direction; Y, second direction; D1, first size; D2, second size; D3, third size; D4, fourth size; D5, fifth size; D6, sixth size; θ1, first tilt angle; θ2, second tilt angle; θ3, third tilt angle; θ4, fourth tilt angle. DETAILED DESCRIPTION

[0062] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0063] A display panel and a display device provided in the embodiments of the present application can improve the light extraction efficiency of a light emitting device.

[0064] In a first aspect of the present application, a display panel is provided, comprising a driving substrate and a light-emitting device layer, wherein the light-emitting device layer is arranged on one side of the driving substrate, the driving substrate comprises a pixel circuit, the light-emitting device layer comprises a plurality of light-emitting devices, and the light-emitting devices are electrically connected to the pixel circuit.

[0065] Figure 1 A schematic partial structural diagram of a display panel provided in an embodiment of the present application. For example, see Figure 1 , Figure 1 The first direction X in the figure is a direction parallel to the plane where the driving substrate 100 is located. Figure 1The second direction Y is a direction perpendicular to the plane where the driving substrate 100 is located, and the first direction X is perpendicular to the second direction Y. The display panel includes a driving substrate 100 and a light-emitting device layer 200, and the light-emitting device includes a first electrode 210, a light-emitting layer 220, a pixel defining layer 240, and a second electrode 230. The pixel defining layer 240 can cover the edge of the first electrode 210, and the pixel defining layer 240 includes a plurality of pixel openings 244, and the light-emitting layer 220 is arranged in the pixel openings 244, and the light-emitting layer 220 is arranged between the first electrode 210 and the second electrode 230. The orthographic projection of one end of the pixel opening 244 close to the driving substrate 100 on the driving substrate 100 falls within the orthographic projection of the first electrode 210 on the driving substrate 100, and the pixel opening 244 is used to expose most of the surface of the first electrode 210. The first electrode 210 is electrically connected to the pixel circuit, so the light-emitting layer can be driven to emit light through the first electrode 210 and the second electrode 230.

[0066] In some examples, the light-emitting layer 220 can be made of organic light-emitting materials. The light-emitting layer 220 needs to be set in the display panel. The first electrode 210 and the second electrode 230 set on both sides of the light-emitting layer 220 can serve as an anode and a cathode, respectively. After the first electrode 210 is electrically connected to the pixel circuit, the light-emitting layer 220 can be driven by the pixel circuit to emit light to realize picture display.

[0067] In some examples, the light-emitting layer 220 includes a charge generation layer, a charge transport layer, an electron generation layer, an electron transport layer and a light-emitting material layer. When the first electrode 210 and the second electrode 230 are energized, the light-emitting layer 220 can be driven to emit light to realize picture display.

[0068] In some examples, the thickness of the light emitting layer 220 may be the total thickness of the charge generation layer, the charge transport layer, the electron generation layer, the electron transport layer, and the light emitting material layer.

[0069] It should be noted that the light emitted by the light-emitting layer will propagate in the pixel defining layer. Since the refractive index difference between the pixel defining layer and the adjacent medium is large, the light will be totally reflected after passing through the pixel defining layer, so that part of the light will continue to propagate in the pixel defining layer due to total reflection, resulting in less light emitted from the light-emitting layer to the display side, resulting in lower light output efficiency of the display panel.

[0070] It should be noted that the light from the light-emitting layer that is laterally incident on the pixel definition layer can be understood as waveguide light. The waveguide light is incident on the pixel definition layer through the light-emitting layer and propagates repeatedly in the pixel definition layer, making it difficult to emit. The waveguide light can also be directly absorbed by the pixel definition layer. The waveguide light can be understood as light transmitted in a direction parallel to the drive substrate. Most of the waveguide light and wide-angle light are difficult to emit from the display panel to the display side, which seriously affects the light output efficiency of the display panel. The display side is usually located on the side of the light-emitting device layer away from the drive substrate.

[0071] In some examples, the light emitting device layer 200 includes a reflective structure 300, and the reflective structure 300 has at least two reflective surfaces, and the at least two reflective surfaces belong to different planes, and the extended surfaces of the reflective surfaces intersect with the driving substrate 100. The two reflective surfaces can respectively reflect the waveguide light and the wide viewing angle light, so as to respectively emit the light to the display side, so as to improve the light extraction efficiency of the display panel.

[0072] For example, see Figure 1 The reflective structure 300 may include a first reflective surface 300-1 and a second reflective surface 300-2. In some examples, the first reflective surface 300-1 and the second reflective surface 300-2 may be connected via a tip 245. The planes where the two reflective surfaces are located may be arranged in parallel. Alternatively, the planes where the two reflective surfaces are located may not be arranged in parallel.

[0073] In some examples, there may be a gap between the first reflective surface 300-1 and the second reflective surface 300-2, so that the distances between the two reflective surfaces and the light-emitting layer 220 along the first direction X are different, and the reflective surfaces at different positions can reflect different ranges of light. The multiple reflective surfaces can work together to gather more light, so that more light can be adjusted through the reflective surface to be emitted to the display side. The waveguide light can be illustrated as the first light L1, and the light emitted from the light-emitting layer at a large viewing angle can be illustrated as the second light L2. That is, the first light L1 and the second light L2 can be emitted to the display side through the first reflective surface 300-1 and the second reflective surface 300-2.

[0074] In some examples, the first reflective surface 300-1 can reflect the first light L1, and the light emitted from the first reflective surface 300-1 can be emitted to the display side in a direction tending to the second direction Y. In some examples, the second reflective surface 300-2 can reflect the second light L2, and the second light L2 can be a wide-angle light, and the second reflective surface 300-2 converges the second light L2 to the display side.

[0075] In some examples, the reflective structure 300 has at least two reflective surfaces, and the two reflective surfaces can be staggered, for example, see Figure 1, the first inclination angle θ1 of the first reflection surface 300-1 is the same as the second inclination angle θ2 of the second reflection surface 300-2, the plane where the first reflection surface 300-1 is located can be parallel to the plane where the second reflection surface 300-2 is located, and there is a distance between the two planes, and part of the light can be directly emitted to the display side after passing through the first reflection surface 300-1 close to the drive substrate 100, and part of the light can also be directly emitted to the display side after passing through the second reflection surface 300-2. In some examples, the distance between the second reflection surface 300-2 and the light-emitting layer 220 is far, so the light emitted from the light-emitting layer 220 to the second reflection surface 300-2 can be the second light L2 with a larger field of view, and the second light L2 can still be emitted to the display side after being reflected by the second reflection surface 300-2, thereby realizing the display function of the display panel.

[0076] Figure 2 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. For example, see Figure 2 The two reflection surfaces are connected, and the extension surfaces of the two reflection surfaces can have different inclination angles with the plane where the driving substrate 100 is located, for example Figure 2 The first inclination angle θ1 and the second inclination angle θ2. Figure 2 The first inclination angle θ1 can be greater than the second inclination angle θ2, so that the light forms output light with different output angles after passing through different reflective surfaces. For example, the first light L1 is emitted to the display side after passing through the first reflective surface 300-1, and the second light L2 is converged to the display side after passing through the second reflective surface L2. That is, the light of different field angles emitted by the light-emitting layer 220 is easier to pass through the reflective surface to be emitted to the display side, thereby improving the light output efficiency of the display panel.

[0077] like Figure 2 As shown, the inclination angle of the second reflection surface 300-2 is different from the inclination angle of the first reflection surface 300-1. The inclination angle of the second reflection surface 300-2 can be smaller than the inclination angle of the first reflection surface 300-1, thereby increasing the distance between the end of the second reflection surface 300-2 away from the first reflection surface 300-1 and the light-emitting layer 220, so that the light received by the second reflection surface 300-2 can have a larger field of view, thereby further improving the light extraction efficiency of the display panel of the present application.

[0078] In some examples, the extended surface of the second reflective surface 300-2 can intersect with the driving substrate 100, that is, the second reflective surface 300-2 is not parallel to the first direction X. Therefore, the second reflective surface 300-2 with a certain inclination angle can converge the light emitted by the light-emitting layer 220, thereby converging more light to improve the display efficiency of the display panel.

[0079] For some examples, see Figure 2, there is an inclination angle between the planes where the two reflecting surfaces are located, and the two reflecting surfaces can have a larger reflection area, thereby reflecting more light.

[0080] In some examples, reference Figure 1 and Figure 2 The extended surface of the reflective surface intersects the driving substrate 100 to avoid the reflective surface being perpendicular or parallel to the plane where the driving substrate 100 is located, thereby utilizing the reflection effect of the reflective surface on the light to emit the light to the display side.

[0081] For some examples, see Figure 1 and Figure 2 The optical path of the light from the light emitting layer 220 to the reflective surface far away from the driving substrate 100 is longer, so the light from the light emitting layer 220 can form a larger viewing angle and a larger light emitting area.

[0082] For example, Figure 1 As shown, the reflective structure 300 is embedded in the pixel definition layer 240 .

[0083] Figure 3 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. For example, see Figure 3 The reflective surface of the reflective structure 300 is embedded in the pixel defining layer 240 to form the reflective structure 300, so as to reflect the waveguide light and improve the light extraction efficiency. The light emitted by the light emitting layer 220 can be emitted to the display side without affecting the definition effect of the pixel defining layer 240. In addition, Figure 3 The first electrode 210 in the pixel defining layer 240 may be disconnected at the edge of the pixel defining layer 240 , thereby preventing a short circuit between the first electrode 210 and the second electrode 230 on the side of the pixel defining layer 240 away from the driving substrate 100 .

[0084] It should be noted that for device structures with strong microcavities, the light extraction efficiency loss of strong microcavities comes from surface plasmon polariton (SPP) and optical waveguide. Since strong microcavities increase the microcavity by increasing the reflection efficiency of the cathode and anode, and the increase in reflectivity will increase the reflection between the film layers, thereby increasing the optical waveguide and reducing the light extraction efficiency.

[0085] Figure 4 A schematic partial structural diagram of a display panel provided in an embodiment of the present application. In some embodiments, see Figure 4, the first electrode 210 is embedded in the pixel defining layer 240, and part of the first electrode 210 can be used as a reflective surface of the reflective cup structure, thereby forming a reflective cup structure. Using the first electrode 210, the reflective cup structure can reflect waveguide light to improve the light extraction efficiency of the display panel. The reflective cup structure can emit light to the side of the pixel defining layer 240 away from the driving substrate 100, that is, to the display side. However, in the direction parallel to and perpendicular to the plane where the driving substrate is located, the reflective cup structure has a certain size, that is, it has a certain height and width. At the same time, the pixel defining layer 240 covers the reflective cup structure, resulting in a larger size on both sides of the pixel defining layer 240 in the direction parallel to the plane where the driving substrate 100 is located, that is, the pixel defining layer 240 needs to be further expanded, so that the size of the pixel opening 244 formed by the pixel defining layer 240 is smaller, resulting in a decrease in the aperture ratio of the display panel, affecting the luminous effect of the display panel.

[0086] It should be noted that see Figure 4 , the pixel defining layer 240 at the side away from the driving substrate 100 and corresponding to the position of the maximum external cutting angle is closer to the tip 245 at the side of the reflector structure away from the driving substrate 100, and the thickness of the pixel defining layer 240 corresponding to the tip 245 is thinner. After the first electrode 210 and the second electrode 230 are connected, the pixel defining layer 240 corresponding to the tip 245 is thinner, so it is easier to cause the pixel defining layer 240 to be broken down due to insufficient bearing capacity, so that a short circuit is formed between the first electrode 210 and the second electrode 230, and the light-emitting effect of the display panel is affected. Therefore, see Figure 1 The first stepped structure 310 having at least two stepped surfaces can increase the distance between the reflective cup structure and the position of the maximum external cutting angle of the pixel defining layer 240 , thereby avoiding the occurrence of a breakdown phenomenon between the reflective cup structure and the pixel defining layer 240 .

[0087] The present application uses at least two non-coplanar reflective surfaces in the reflective structure 300 to reflect the light emitted from the light-emitting layer 220 to the pixel defining layer 240, that is, the reflective structure 300 can reflect the wide-angle light emitted from the light-emitting layer 220, and the reflective surface close to the light-emitting layer in the reflective structure 300 can gather more light, so that more wide-angle light is emitted from the display panel, thereby improving the light output efficiency of the display panel.

[0088] In some embodiments, the orthographic projection of one end of the pixel opening 244 away from the driving substrate 100 on the driving substrate 100 is a first projection, and the orthographic projections of at least two reflective surfaces on the driving substrate 100 fall within the first projection.

[0089] In some examples, such as Figure 1As shown, the pixel opening 244 can be a hollow that is wider at the top and narrower at the bottom, that is, the diameter of the pixel opening 244 at the end away from the driving substrate 100 is larger than the diameter of the pixel opening 244 at the end close to the driving substrate 100. Then, the orthographic projection of the end of the pixel defining layer 240 away from the driving substrate 100 on the driving substrate 100 is the first projection 246, and the first projection 246 covers the orthographic projection of the reflective surface on the driving substrate 100. The pixel defining layer 240 can cover the reflective surface.

[0090] In some examples, the reflective structure 300 includes a first stepped structure 310 , the first stepped structure 310 includes at least two stepped surfaces, and the reflective surface includes at least one stepped surface of the first stepped structure 310 .

[0091] Figure 5 A schematic partial structural diagram of another display panel provided in an embodiment of the present application; Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some embodiments, reference Figure 5 and Figure 6 The reflective structure 300 includes a first stepped structure 310 , the first stepped structure 310 includes at least two stepped surfaces, and the reflective surface includes at least one stepped surface of the first stepped structure.

[0092] In some embodiments, see Figure 5 The first step surface 311-1 in the first step 311 can be used as a first reflection surface 300-1 to reflect the first light L1, and the second step surface 311-2 in the first step 311 can also be used as a reflection surface to reflect the light emitted by the light-emitting layer 220. For example, part of the light passes through the first step surface 311-1 and is reflected to the pixel defining layer 240. Since the refractive index of the pixel defining layer 240 is different from the refractive index of the film layer on the side of the pixel defining layer 240 away from the driving substrate 100, the light is totally reflected at the film layer of the pixel defining layer 240 and can be reflected through the second step surface 311-2.

[0093] In some embodiments, see Figure 6 The first step 311 in the first step structure 310 includes two step surfaces, and the two step surfaces are connected by a tip 245. Of the two step surfaces, the step surface having an angle with the plane where the drive substrate 100 is located can be used as a reflection surface, and the other step surface can be used to connect adjacent reflection surfaces, or to connect the step surface and the pixel circuit. Both step surfaces may not be parallel to the plane where the drive substrate 100 is located, and both step surfaces may be used as reflection surfaces, or one of them may be used as a reflection surface.

[0094] For some examples, see Figure 6The step surface of the first step structure 310 that is inclined to the driving substrate 100 can be used as a reflection surface, and the other step surface can be used to connect with other step structures, for example, one step surface is used for reflection, and the other step surface is used to connect with the second step structure 242, or see Figure 5 , the other stepped surface can also serve as a reflecting surface and is connected to the second stepped structure 242 .

[0095] See also Figure 5 The first stepped structure 310 has two reflection surfaces, one of which is a step surface close to and inclined to the plane where the driving substrate 100 is located, and the other is a step surface away from the plane where the driving substrate 100 is located.

[0096] In some examples, the step surface in any step can be used as a reflection surface for reflecting light.

[0097] In some examples, at least one stepped surface of the first stepped structure 310 is disposed close to the driving substrate 100 , and at least one stepped surface of the first stepped structure 310 is disposed away from the driving substrate 100 .

[0098] In some examples, extended surfaces of at least two stepped surfaces of the first stepped structure 310 both intersect with the driving substrate 100 .

[0099] In some examples, such as Figure 2 As shown, Figure 2 The example shows two step structures, each of which includes two step surfaces, one of which is close to the driving substrate 100 and the other is far away from the driving substrate 100 , and both step surfaces are not parallel or perpendicular to the plane where the driving substrate 100 is located.

[0100] In some examples, the first stepped structure 310 includes at least two steps, an extension surface of at least one step surface in any step intersects with the driving substrate 100 , and at least one step surface is parallel to the plane where the driving substrate 100 is located.

[0101] In some embodiments, the two-step structure can receive and reflect more light. Figure 5 , the first step surface 311-1 of the first step 311 is not arranged in parallel with the second step surface 311-2, the first step 311 is connected to the second step 312, and the two step surfaces of the second step 312 are not arranged in parallel, that is, Figure 5 The reflective structure 300 may include four reflective surfaces, and the light emitted from the light emitting layer 220 may be emitted to the display side through the four reflective surfaces respectively.

[0102] In some examples, the first stepped structure 310 includes at least three steps, the tips of the at least three steps are coplanar, and the tip 245 of each step is the intersection of two step surfaces.

[0103] In some examples, an orthographic projection of the reflective structure 300 on the driving substrate 1000 includes a ring shape.

[0104] In some examples, the first stepped structure 310 includes at least three steps, the tips of the at least three steps are coplanar, the tip of each step is the intersection of two step surfaces, and the orthographic projection of the reflective structure 300 on the driving substrate 100 includes a ring shape.

[0105] In some embodiments, see Figure 6 The first stepped structure 310 includes three levels, and adjacent stepped structures are connected by tips 245, and a plurality of tips 245 can form a tip portion. The tips 245 of the three levels of steps are coplanar, and the plane intersects with the plane where the drive substrate 1000 is located, that is, the reflection surface used for reflection in the first stepped structure 310 is inclined to the drive substrate 100, so the positive projection of the reflection structure 300 on the drive substrate 100 can form a ring.

[0106] For some examples, see Figure 6 The first step surfaces 311-1 in the three steps can be arranged parallel to each other, and the tips 245 at the connection points of the three steps can be in the same plane, which can be inclined to the plane where the drive substrate 100 is located, so that the transition between the three steps is smoother. Figure 6 The pixel defining layer 240 formed on the side of the reflective structure 300 away from the driving substrate 100 has better flatness. In some examples, the first tilt angle θ1 corresponding to the first step 311, the second tilt angle θ2 corresponding to the second step 312, and the third tilt angle θ3 corresponding to the third step 313 may be different. Since the tip 245 is arranged in the same plane, the step with a smaller tilt angle has a longer positive projection on the driving substrate 100 along the first direction X, and the step can receive more light. Figure 6 As shown, the third inclination angle θ3 may be smaller than the other two inclination angles, so that the third step can receive more light, thereby achieving adjustment of light with a large viewing angle and improving the light extraction efficiency of the display panel.

[0107] In some embodiments, the tip 245 of the first stepped structure 310 may be away from the maximum cutting angle position of the pixel defining layer 240, so that the thickness of the tip 245 of any step in the second direction Y is relatively uniform. At the same time, the distance between the tip 245 and the maximum cutting angle position may be increased to avoid the phenomenon that the pixel defining layer 240 is broken down due to insufficient distance between the tip 245 and the maximum cutting angle or insufficient film thickness.

[0108] Figure 7 A schematic partial structural diagram of a display panel provided in an embodiment of the present application. In some examples, see Figure 7 The first step structure 310 includes a first step 311, a second step 312, a third step 313 and a fourth step 314, each step includes a first step surface 311-1 and a second step surface 311-2 connected to each other, the first step surface 311-1 is arranged close to the driving substrate 100, the second step surface 311-2 is arranged away from the driving substrate 100, and the second step surface 311-2 is parallel to the plane where the driving substrate 100 is located. The reflection surface can include at least the first step surface 311-1 in each step.

[0109] It should be supplemented that each step in the present application may include a first step surface 311-1 and a second step surface 311-2 connected to each other. For example, the second step surface 311-2 of the first step 311 may be connected to the first step surface 311-1 of the second step 312. Figure 6 , a tip 245 may be formed between adjacent step surfaces. Figure 5 , a tip 245 may be formed between adjacent steps.

[0110] In some embodiments, the first step 311 is disposed close to the driving substrate 100, the fourth step 314 is disposed away from the driving substrate 100, the second step 312 is connected between the first step 311 and the third step 313, and the third step 313 is connected between the second step 312 and the fourth step 314. The four tips 245 may be disposed in a coplanar manner.

[0111] In some embodiments, see Figure 7 , the angle between the first step surface 311-1 of the first step 311 and the plane where the driving substrate 100 is located is a first angle, and the first angle corresponds to the first tilt angle θ1. The angle between the first step surface 311-1 of the second step 312 and the plane where the driving substrate 100 is located is a second angle, and the second angle corresponds to the second tilt angle θ2. The angle between the first step surface 311-1 of the third step 313 and the plane where the driving substrate 100 is located is a third angle, and the third angle corresponds to the third tilt angle θ3. The angle between the first step surface 311-1 of the fourth step 314 and the plane where the driving substrate 100 is located is a fourth angle, and the fourth angle corresponds to the fourth tilt angle θ4.

[0112] In some examples, such as Figure 7As shown, the third inclination angle θ3 and the fourth inclination angle θ4 are both greater than or equal to the first inclination angle θ1, and the third inclination angle θ3 and the fourth inclination angle θ4 are both greater than the second inclination angle. The first step 311 corresponding to the first inclination angle θ1 and the second step 312 corresponding to the second inclination angle θ2 can both be used to reflect the first light L1, so the first inclination angle θ1 and the second inclination angle θ2 are as close to 45° as possible, and the first step 311 and the second step 312 can receive more waveguide light, so as to facilitate the extraction of the waveguide light. The third step 313 corresponding to the third inclination angle θ3 and the fourth step 314 corresponding to the fourth inclination angle θ4 can be used to converge and receive more light, so the third inclination angle θ3 and the fourth inclination angle θ4 can be close to 90°, so that the third step 313 and the fourth step 314 are longer in size along the first direction X, and can receive more light to converge the wide viewing angle light to the display side. Therefore, more light is reflected by the multiple steps, and more light is emitted after being reflected by the remaining reflection surfaces, thereby improving the light extraction efficiency of the display panel.

[0113] For some examples, see Figure 7 The third angle and the fourth angle with larger angles make it easier for the pixel defining layer 240 to flow on the third step 313 and the fourth step 314 during the formation process, thereby preventing the pixel defining layer 240 from stagnating on the step surface.

[0114] In some embodiments, the maximum dimension of the first step 311 in the first direction X is a first dimension D1, the maximum dimension of the second step 312 in the first direction X is a second dimension D2, the maximum dimension of the third step 313 in the first direction X is a third dimension D3, and the maximum dimension of the fourth step 2140 in the first direction X is a fourth dimension D4.

[0115] For some examples, see Figure 7 Since the third inclination angle θ3 and the fourth inclination angle θ4 are larger, the third size D3 and the fourth size D4 are both larger than the first size D1 and the second size D2, thereby ensuring that the third size D3 and the fourth size D4 can receive more light and emit the light to the display side.

[0116] In some examples, the first angle ranges from 45° to 50°.

[0117] In some embodiments, the first angle may be 45°, 50°, or 60°. The larger the first angle, the larger the size of the first step 311 in the second direction Y, and the first step 311 can emit more waveguide light to the air. For example, in an example where the first angle is 60°, the first step surface 311-1 can extract more waveguide light. In addition, in an example where the pixel defining layer 240 covers the first step structure 310, on the plane where the drive substrate 100 is located, the distance between the pixel defining layer 240 and the first step 311 is smaller, thereby increasing the aperture ratio of the display panel.

[0118] In some examples, the second angle ranges from 45° to 50°.

[0119] In some embodiments, the second angle may be 45° or 50°.

[0120] In some examples, the third angle ranges from 60° to 80°.

[0121] In some embodiments, the third angle may be 60°, 70° or 80°.

[0122] In some examples, the fourth angle ranges from 60° to 80°.

[0123] In some embodiments, the fourth angle may be 60°, 70° or 80°.

[0124] In some examples, such as Figure 7 As shown, the first angle ranges from 45-50°, the second angle ranges from 45-50°, the third angle ranges from 60-80°, and the fourth angle ranges from 60-80°. Therefore, the first step 311 and the second step 312 approaching 45° can emit the waveguide light in the direction tending to the second direction Y, and the third step 313 and the fourth step 314 have larger inclination angles, thereby being able to gather more wide-angle light.

[0125] Figure 8 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some examples, such as Figure 8 As shown, the first angle is 60°, the second angle is 45°, the third angle has an angle range of 60-80°, and the fourth angle has an angle range of 60-80°. Therefore, the first step 311 can receive more light emitted from the light-emitting layer 220, and make D1 of the first step 311 smaller, and then D4 of the fourth step 311 larger, so that the reflective structure can receive more wide-angle light.

[0126] For some examples, see Figure 7, the pixel defining layer 240 covers the reflective structure 300, and one end of the pixel defining layer 240 close to the driving substrate 100 may be connected to the first stepped surface 311-1. Figure 7 In the example, the waveguide light may be reflected to a side of the pixel defining layer 240 away from the driving substrate 100 through the first stepped surface 311 - 1 .

[0127] In some embodiments, see Figure 4 and Figure 7 , in the plane where the driving substrate 100 is located, Figure 7 The distance between the middle reflective surface and the pixel defining layer 240 is less than Figure 4 The distance between the middle reflective cup structure and the pixel defining layer. At the same time, along the first direction X, Figure 7 The sum of the distances between D1, D2, D3 and D4 is less than Figure 4 The orthographic projection length of the reflective cup structure on the driving substrate 100. Therefore, Figure 7 The opening ratio is greater than Figure 4 The opening ratio in.

[0128] In some examples, the first angle is greater than the second angle. Or the maximum dimension of the first step 311 in the first direction X is the first dimension D1, the maximum dimension of the second step 312 in the first direction X is the second dimension D2, and the first dimension D1 is greater than the second dimension D2. Or the first angle is greater than the second angle, and the first dimension D1 is greater than the second dimension D2.

[0129] In some embodiments, the first step surface 311 - 1 of the first step 311 can receive more light than the first step surface 311 - 1 of the second step 312 , so the first step 311 has a larger inclination angle, which can achieve a wide-angle light convergence effect.

[0130] In some embodiments, Figure 7 As shown, the sum of the first dimension D1, the second dimension D2, the third dimension D3 and the fourth dimension D4 may be less than Figure 4 In the example of FIG. 1 , the maximum size of the first electrode via hole 213 and the reflective structure 300 along the first direction X is Figure 4 For example, Figure 7 The example may have a larger aperture ratio.

[0131] In some embodiments, the maximum dimension of the first step 311 in the second direction Y is the first thickness, the thickness of the light-emitting layer 220 in the pixel opening 244 in the second direction Y is the second thickness, the first thickness is less than the second thickness, and the second direction Y is a direction perpendicular to the plane where the driving substrate 100 is located.

[0132] In some examples, along the second direction Y, the height of the end of the light emitting layer 220 away from the driving substrate 100 is higher than the height of the end of the first step 311 away from the driving substrate 100. Figure 7 As shown, the first step surface 311-1 of the first step 311 is inclined to the plane where the driving substrate 100 is located, and the pixel defining layer 240 covers the first step 311. The second step surface 311-2 of the first step 311 is parallel to the plane where the driving substrate 100 is located, and the second thickness corresponding to the light emitting layer 220 is greater than the first thickness corresponding to the first step 311. The light emitted by the light emitting layer 220 can be propagated through the first step surface 311-1 of each step and the pixel defining layer 240 for waveguide light propagation.

[0133] In some examples, such as Figure 8 As shown, the first step surface 311-1 of the first step 311 is inclined to the plane where the driving substrate 100 is located, and the pixel defining layer 240 covers the second step surface 311-2, the second step 312, the third step 313 and the fourth step 314 of the first step 311, that is, the first step surface 311-1 of the first step 311 can be connected to the light-emitting layer 220, so the length of the light-emitting layer 220 along the first direction X can extend to the first step surface 311-1, as shown in FIG. Figure 8 The length of the light emitting layer 220 in the example is compared with that in Figure 7 The length of the light emitting layer 220 in the example is longer. Figure 8 The aperture ratio of the display panel in the example has been improved.

[0134] In some embodiments, see Figure 4 and Figure 8 , in the plane where the driving substrate 100 is located, Figure 8 The distance between the middle reflective surface and the pixel defining layer 240 is less than Figure 4 The distance between the middle reflective cup structure and the pixel defining layer. At the same time, along the first direction X, Figure 8 The sum of the distances between D1, D2, D3 and D4 is less than Figure 4 The orthographic projection length of the reflective cup structure on the driving substrate 100 is, therefore, Figure 8 The opening ratio is greater than Figure 4 The opening ratio in.

[0135] In some embodiments, the first electrode 210 includes a first electrode portion 211 , and the first electrode portion 211 is connected to the light emitting layer 220 .

[0136] In some embodiments, one end of the reflective structure 300 is electrically connected to the first electrode portion 211 , and the other end of the reflective structure 300 is electrically connected to the pixel circuit through the first electrode via 213 .

[0137] In some embodiments, the reflective structure 300 and the first electrode portion 211 are an integrated structure.

[0138] In some examples, such as Figure 7 As shown, the reflective structure 300 can be disposed in the same layer as the first electrode portion 211, for example, formed by the same patterning process, that is, disposed in the same layer. In some examples, the reflective structure 300 can be an integrally formed structure with the first electrode portion 211. In some examples, the reflective structure 300 can be made of the same material as the first electrode portion 211.

[0139] In some embodiments, the first electrode 210 may serve as an anode, and the reflective structure 300 may be prepared simultaneously with the anode.

[0140] In some embodiments, the first electrode 210 can serve as the reflective structure 300 to reflect the first light L1 without increasing the complexity of the process.

[0141] In some embodiments, the second electrode 230 is disposed on a side of the light emitting layer 220 away from the driving substrate 100 .

[0142] The second electrode 230 includes a third electrode portion 231 , and the second electrode portion 212 is connected to the light emitting layer 220 .

[0143] The reflective structure 300 and the third electrode portion 231 are an integrated structure.

[0144] In some embodiments, the second electrode 230 may serve as a cathode, and the reflective structure 300 may be prepared in the same layer as the second electrode 230 .

[0145] In some examples, reference Figure 8 The reflective structure 300 may include a partial structure disposed at the same layer as the first electrode 210 and a partial structure disposed at the same layer as the second electrode 230 .

[0146] In some embodiments, the first electrode 210 and the second electrode 230 may be made of metal material, and the reflective property of the metal material may be utilized to enable the reflective structure to have the effect of reflecting light.

[0147] In some examples, the light emitting layer 220 is located between the first electrode 210 and the third electrode portion 231. When the first electrode 210 and the second electrode 230 are turned on, the light emitting layer 220 between the first electrode 210 and the second electrode 230 emits light. In some examples, the orthographic projection of the third electrode portion 231 of the second electrode 230 on the driving substrate 100 covers the orthographic projection of the light emitting layer 220 on the driving substrate 100.

[0148] For some examples, see Figure 8, the third electrode portion 231 covers the side of the light emitting layer 220 away from the driving substrate 100, and the reflective structure 300 can be an integrated structure and a same-layer structure with the third electrode portion 231. In some examples, a sacrificial layer can be provided in the pixel defining layer 240, and the sacrificial layer is provided between the reflective structure 300 and the first electrode 210, thereby forming a cavity structure, so that the reflective structure 300 is separated from the first electrode 210, so as to avoid the reflective structure 300 being connected to the second electrode 230 and electrically connected to the first electrode 210 at the same time, so that a short circuit between the first electrode 210 and the second electrode 230 occurs.

[0149] For some examples, see Figure 3 The reflective structure 300 includes at least two reflective layers, at least one reflective layer is disposed on the same layer as the first electrode 210 , and the reflective layer and the first electrode 210 are disconnected.

[0150] In some examples, at least one reflective layer is disposed on the same layer as the second electrode 230 .

[0151] In some examples, at least one reflective layer is disposed on the same layer as the first electrode 210 , and at least one reflective layer is disposed on the same layer as the second electrode 230 .

[0152] For some examples, see Figure 7 The pixel defining layer 240 includes at least two defining layers, the reflective structure 300 is disposed between the two defining layers, and the defining layer far from the driving substrate 100 covers the defining layer close to the driving substrate 100 .

[0153] In some embodiments, see Figure 7 , the first electrode 210 and the reflective structure 300 may be formed between two defining layers, wherein one defining layer may fully or partially cover the reflective structure 300, for example, see Figure 7 The pixel defining layer 240 away from the driving substrate 100 may cover the entire surface of the reflective structure 300 away from the driving substrate 100 .

[0154] For some examples, see Figure 8 The pixel defining layer 240 away from the driving substrate 100 may cover a portion of the surface of the reflective structure 300 away from the driving substrate 100 .

[0155] For some examples, see Figure 7 The pixel defining layer 240 includes a first defining layer 241 and a second defining layer 243 , the reflective structure is disposed between the first defining layer 241 and the second defining layer 243 , the second defining layer 243 is disposed on a side of the first defining layer 241 away from the driving substrate 100 , and the reflective structure 300 is disposed on the same layer as the first electrode 210 .

[0156] For some examples, see Figure 7 , the orthographic projection of the second defining layer 243 on the driving substrate 100 covers the orthographic projection of the first defining layer 241 on the driving substrate 100 .

[0157] For some examples, see Figure 8 , the orthographic projection of the first defining layer 241 on the driving substrate 100 covers the orthographic projection of the second defining layer 243 on the driving substrate 100 .

[0158] In some embodiments, the light of the light emitting layer 220 may be reflected by the reflective structure 300 and emitted to the display side through the second defining layer 243 .

[0159] For some examples, see Figure 7 The first defining layer 241 is provided with a first electrode via 213, and the first electrode via 213 is provided on a side of the reflective structure 300 away from the pixel opening 244. The first electrode 210 includes a first electrode portion 211 and a second electrode portion 212, and the second electrode portion 212 is electrically connected to the reflective structure 300 and the pixel circuit respectively through the first electrode via 213, and the reflective structure 300 is electrically connected to the first electrode portion 211, and the first electrode portion 211 is connected to the light emitting layer 220.

[0160] In some embodiments, see Figure 7 The first electrode via 213 is disposed in the pixel defining layer 240, the aperture of the first electrode via 213 is disposed along the second direction Y, the second electrode portion 212 is disposed in the first electrode via 213, and both ends of the second electrode portion 212 can be respectively connected to the reflective structure 300 and the pixel circuit in the driving substrate 100.

[0161] For some examples, see Figure 7 The first electrode portion 211 can be electrically connected to the second electrode portion 212 through the reflective structure 300, and the light-emitting layer 220 is located between the first electrode portion 211 and the second electrode 230, so the light-emitting layer 220 between the first electrode portion 211 and the second electrode 230 can emit light.

[0162] In some embodiments, the first defining layer 241 includes a second stepped structure 242 , and the first stepped structure 310 covers the second stepped structure 242 .

[0163] For some examples, see Figure 7 A stepped structure may be formed on the first defining layer 241 , and the first stepped structure 310 in the reflective structure 300 may cover the second stepped structure 242 of the first defining layer 241 .

[0164] In some examples, the shape and size of the first stepped structure 310 are adapted to the shape and size of the second stepped structure 242 .

[0165] For some examples, see Figure 7 and Figure 8 The first step structure 310 includes a first step 311, a second step 312, a third step 313 and a fourth step 314, and adjacent steps are connected by a tip 245. Each step includes a first step surface 311-1 and a second step surface 311-2 connected to each other. The first step surface 311-1 is arranged close to the driving substrate 100, and the second step surface 311-2 is arranged away from the driving substrate 100. The second step surface 311-2 is parallel to the plane where the driving substrate 100 is located. The reflection surface can at least include the first step surface 311-1 of each step.

[0166] In some embodiments, see Figure 8 The first step 311 in the first stepped structure 310 can be closer to the light emitting layer 220 , so as to receive more light emitted by the light emitting layer 220 .

[0167] In some embodiments, see Figure 8 The first step 311 is disposed close to the driving substrate 100 , the fourth step 314 is disposed away from the driving substrate 100 , the second step 312 is connected between the first step 311 and the third step 313 , and the third step 313 is connected between the second step 312 and the fourth step 314 .

[0168] In some examples, the light emitted from the light emitting layer 220 may pass through the first step 311 , the second step 312 , the third step 313 , and the fourth step 314 in sequence before being emitted to the display side.

[0169] In some embodiments, see Figure 7 The second defining layer 243 covers the first step surface 311 - 1 of the first step 311 .

[0170] In some embodiments, see Figure 8 The second defining layer 243 covers the second step surface 311 - 2 of the first step 311 , and the orthographic projection of the second defining layer 243 on the driving substrate 100 does not overlap with the orthographic projection of the first step surface 311 - 1 of the first step 311 on the driving substrate 100 .

[0171] In some embodiments, see Figure 7The second defining layer 243 covers the first step surface 311-1 and the second step surface 311-2 of the first step 311, and the distance between the tip 245 of the first step 311 and the maximum circumscribed angle position of the second defining layer 243 makes it difficult to penetrate the second defining layer 243. The orthographic projection of the second defining layer 243 on the driving substrate 100 does not overlap with the orthographic projection of the first step surface 311-1 of the first step 311 on the driving substrate 100, thereby improving the aperture ratio of the display panel.

[0172] For some examples, see Figure 7 The second defining layer 243 covers the first step surface 311 - 1 , and the light emitted from the light emitting layer 220 can propagate to the first step surface 311 - 1 after passing through the second defining layer 243 .

[0173] For some examples, see Figure 8 The second defining layer 243 covers the second step surface 311-2, part of the light emitted from the light-emitting layer 220 can be emitted to the display side through the first step surface 311-1, and part of the light can be transmitted through the second defining layer 243 to the second step surface 311-2 or the second step 312 and then emitted to the display side.

[0174] In some embodiments, see Figure 7 The maximum dimension of the first stepped structure 310 in the first direction X is a fifth dimension D5, the distance between one end of the first stepped structure 310 connected to the first electrode portion 211 and the first electrode via 213 is a sixth dimension D6, and the fifth dimension D5 is smaller than the sixth dimension D6.

[0175] For some examples, see Figure 7 The first electrode via 213 is disposed on a side of the first stepped structure 310 away from the light emitting layer 220 , so the fifth dimension D5 is smaller than the sixth dimension D6 .

[0176] Second, Fig. 9 A schematic partial structural diagram of a display device provided in an embodiment of the present application, see Fig. 9 An embodiment of the present application provides a display device, comprising a display panel in any of the above technical solutions.

[0177] The display device provided in the embodiment of the present application may include a television, a computer, a smart phone, a smart wearable device, a laptop computer, a tablet computer, etc. The smart wearable device may include a smart watch, an AR (augmented reality) device, a VR (virtual reality) device, etc.

[0178] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0179] The "patterning process" mentioned in this application includes processes such as coating photoresist, mask exposure, development, etching, and stripping photoresist for metal materials, inorganic materials, or transparent conductive materials, and includes processes such as coating organic materials, mask exposure, and development for organic materials. Deposition can be carried out by any one or more of sputtering, evaporation, and chemical vapor deposition, coating can be carried out by any one or more of spraying, spin coating, and inkjet printing, and etching can be carried out by any one or more of dry etching and wet etching, which are not limited in this disclosure. "Thin film" refers to a thin film made by deposition, coating, or other processes on a substrate layer of a certain material. If the "thin film" does not require a patterning process during the entire production process, the "thin film" can also be called a "layer". If the "thin film" requires a patterning process during the entire production process, it is called a "thin film" before the patterning process and a "layer" after the patterning process. The "layer" after the patterning process contains at least one "pattern".

[0180] The "A and B are arranged in the same layer" mentioned in the present application means that A and B are formed simultaneously through the same patterning process, and the "thickness" of the film layer is the size of the film layer in the direction perpendicular to the display panel. In the exemplary embodiments of the present disclosure, "the orthographic projection of B is within the range of the orthographic projection of A" or "the orthographic projection of A includes the orthographic projection of B" means that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A, or the boundary of the orthographic projection of A overlaps with the boundary of the orthographic projection of B.

[0181] “A and / or B” mentioned in this application includes the following three combinations: A only, B only, and a combination of A and B.

[0182] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0183] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0184] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: A driving substrate and a light emitting device layer, wherein the light emitting device layer is arranged on one side of the driving substrate, the driving substrate comprises a pixel circuit, and the light emitting device layer comprises a plurality of light emitting devices; The light-emitting device comprises a first electrode, a light-emitting layer, a pixel defining layer, and a second electrode, wherein the pixel defining layer covers an edge of the first electrode, the pixel defining layer comprises a plurality of pixel openings, the light-emitting layer is disposed in the pixel openings, the light-emitting layer is disposed between the first electrode and the second electrode, the orthographic projection of the pixel opening on the driving substrate falls within the orthographic projection of the first electrode on the driving substrate, and the first electrode is electrically connected to the pixel circuit; The light emitting device layer comprises a reflective structure, wherein the reflective structure has at least two reflective surfaces, wherein at least two of the reflective surfaces belong to different planes, and an extended surface of the reflective surface intersects with the driving substrate; The reflective structure is arranged on the inner wall of the pixel opening, or the reflective structure is embedded in the pixel defining layer.

2. The display panel according to claim 1, characterized in that: The orthographic projection of one end of the pixel opening away from the driving substrate on the driving substrate is a first projection, and the orthographic projections of at least two of the reflection surfaces on the driving substrate fall within the first projection.

3. The display panel according to claim 1, characterized in that: The reflective structure includes a first stepped structure, the first stepped structure includes at least two stepped surfaces, and the reflective surface includes at least one of the stepped surfaces of the first stepped structure.

4. The display panel according to claim 3, characterized in that: At least one of the step surfaces of the first step structure is arranged close to the driving substrate, and at least one of the step surfaces of the first step structure is arranged away from the driving substrate; The extended surfaces of at least two of the step surfaces of the first step structure intersect with the driving substrate.

5. The display panel according to claim 3, characterized in that: The first step structure includes at least two levels, an extended surface of at least one of the step surfaces intersects with the driving substrate, and at least one of the step surfaces is parallel to a plane where the driving substrate is located.

6. The display panel according to claim 3, characterized in that: The first step structure comprises at least three steps, the tips of the at least three steps are coplanar, and the tip of each step is the intersection of two step surfaces; and / or, The orthographic projection of the reflective structure on the driving substrate includes a ring shape.

7. The display panel according to claim 3, characterized in that: The first step structure includes a first step, a second step, a third step and a fourth step, each step includes a first step surface and a second step surface connected to each other, the first step surface is arranged close to the driving substrate, the second step surface is arranged away from the driving substrate, the second step surface is parallel to the plane where the driving substrate is located, and the reflection surface includes the first step surface; The first step is arranged close to the driving substrate, the fourth step is arranged far from the driving substrate, the second step is connected between the first step and the third step, and the third step is connected between the second step and the fourth step; The angle between the first step surface of the first step and the plane where the driving substrate is located is a first angle, the angle between the first step surface of the second step and the plane where the driving substrate is located is a second angle, the angle between the first step surface of the third step and the plane where the driving substrate is located is a third angle, and the angle between the first step surface of the fourth step and the plane where the driving substrate is located is a fourth angle; The third angle and the fourth angle are both greater than or equal to the first angle, and the third angle and the fourth angle are both greater than the second angle.

8. The display panel according to claim 7, characterized in that: The maximum size of the first step in the first direction is a first size, the maximum size of the second step in the first direction is a second size, the maximum size of the third step in the first direction is a third size, the maximum size of the fourth step in the first direction is a fourth size, and the first direction is the direction of connection of two adjacent pixel openings; The third size and the fourth size are both larger than the first size and the second size.

9. The display panel according to claim 7, characterized in that: The first angle ranges from 45° to 50°; and / or, The second angle ranges from 45° to 50°; and / or, The third angle ranges from 60° to 80°; and / or, The fourth angle ranges from 60° to 80°.

10. The display panel according to claim 7, characterized in that: The first angle is greater than the second angle; and / or, The maximum dimension of the first step in the first direction is a first dimension, the maximum dimension of the second step in the first direction is a second dimension, and the first dimension is greater than the second dimension.

11. The display panel according to claim 7, characterized in that: The maximum dimension of the first step in the second direction is a first thickness, the thickness of the light-emitting layer in the pixel opening in the second direction is a second thickness, the first thickness is smaller than the second thickness, and the second direction is a direction perpendicular to the plane where the driving substrate is located.

12. The display panel according to any one of claims 1 to 11, characterized in that: The first electrode includes a first electrode portion, and the first electrode portion is connected to the light-emitting layer; One end of the reflective structure is electrically connected to the first electrode portion, and the other end of the reflective structure is electrically connected to the pixel circuit through a first electrode via hole; The reflective structure and the first electrode portion are an integrated structure.

13. The display panel according to any one of claims 1 to 11, characterized in that: The second electrode is arranged on a side of the light emitting layer away from the driving substrate; The second electrode includes a third electrode portion, and the third electrode portion is connected to the light-emitting layer; The reflective structure and the third electrode portion are an integrated structure.

14. The display panel according to any one of claims 1 to 11, characterized in that: The reflective structure comprises at least two reflective layers; At least one reflective layer is disposed on the same layer as the first electrode; and / or, At least one reflective layer is disposed on the same layer as the second electrode.

15. The display panel according to any one of claims 1 to 11, characterized in that: The pixel definition layer includes at least two definition layers, and the definition layer far from the driving substrate is coated on the definition layer close to the driving substrate; The reflective structure is arranged between the two defining layers.

16. The display panel according to claim 3, characterized in that: The pixel defining layer includes a first defining layer and a second defining layer, the reflective structure is arranged between the first defining layer and the second defining layer, the second defining layer is arranged on a side of the first defining layer away from the driving substrate, and the reflective structure is arranged in the same layer as the first electrode; The first defining layer is provided with a first electrode via hole, the first electrode includes a first electrode portion and a second electrode portion, the second electrode portion is electrically connected to the reflective structure and the pixel circuit respectively through the first electrode via hole, the reflective structure is electrically connected to the first electrode portion, and the first electrode portion is connected to the light-emitting layer; The first defining layer includes a second stepped structure, and the first stepped structure covers the second stepped structure.

17. The display panel according to claim 16, characterized in that: The first step structure includes a first step, a second step, a third step and a fourth step, each step includes a first step surface and a second step surface connected to each other, the first step surface is arranged close to the driving substrate, the second step surface is arranged away from the driving substrate, the second step surface is parallel to the plane where the driving substrate is located, and the reflection surface includes the first step surface; The first step is arranged close to the driving substrate, the fourth step is arranged far from the driving substrate, the second step is connected between the first step and the third step, and the third step is connected between the second step and the fourth step; The second defining layer covers the first step surface of the first step; or, The second defining layer covers the second step surface of the first step, and an orthographic projection of the second defining layer on the driving substrate does not overlap with an orthographic projection of the first step surface of the first step on the driving substrate.

18. The display panel according to claim 17, characterized in that: The maximum dimension of the first stepped structure in the first direction is a fifth dimension, the distance between one end of the first stepped structure connected to the first electrode portion and the first electrode via is a sixth dimension, and the fifth dimension is smaller than the sixth dimension.

19. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 18.

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