Display panel and display device

Abstract

The invention relates to a display panel and a display device. The display panel comprises a substrate; the pixel definition layer is arranged on one side of the substrate and defines a first opening; the first electrode layer is located between the substrate and the pixel definition layer, and a part of the first electrode layer is exposed in the first opening; the light-emitting functional layer is arranged on the side, away from the substrate, of the first electrode layer and at least partially located in the first opening; the sub-pixel definition layer is arranged on one side, far away from the substrate, of the first electrode layer exposed in the first opening; the light-emitting functional layer comprises at least two sub-light-emitting functional layer units which are arranged at intervals, and every two adjacent sub-light-emitting functional layer units are separated by a pixel definition layer; the light extraction layer is arranged on the side, away from the substrate, of the light-emitting functional layer, and the light extraction layer and the light-emitting functional layer are correspondingly arranged. According to the invention, the sub-pixel limiting layer is arranged on the anode layer to divide the light-emitting functional layer into a plurality of parts, and the light extraction layer is arranged above the light-emitting functional layer, so that large-angle light is effectively converged, and the forward light emitting effect is improved.

Description

Technical Field

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

[0002] OLED stands for Organic Light Emitting Diode, which is an active light-emitting device with a sandwich structure consisting of multiple organic layers and electrodes on both sides. Since OLED emits light in all directions, light at large angles cannot be emitted normally due to reflection and refraction at the interface of the film layer. Therefore, there is a problem of less forward light and low forward brightness. How to improve the light emission efficiency has become a problem that needs to be broken through.

[0003] In the prior art, the forward light extraction rate is usually improved by providing a pixel definition layer PDL and an encapsulation layer, but the effect is not ideal.

[0004] The invention patent with the authorization announcement number CN 109873023B specifically discloses an OLED display substrate and its preparation method and display device. The OLED display substrate of the invention is equivalent to inserting a reflective film layer obliquely in the pixel definition structure, reflecting the light leakage that may be generated in the pixel light-emitting area back to the pixel area, thereby avoiding light leakage and improving the light-emitting efficiency. However, its light-emitting efficiency still has a lot of room for improvement. Summary of the invention

[0005] Based on this, it is necessary to provide a display panel and a display device to address the above-mentioned technical problems existing in the prior art. The present invention divides the light-emitting functional layer into multiple parts by arranging a sub-pixel defining layer on the anode layer, and arranges a light extraction layer above the light-emitting functional layer, which can effectively gather large-angle light and improve the forward light output effect.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A display panel, comprising:

[0008] substrate;

[0009] A pixel definition layer, which is disposed on one side of the substrate and defines a first opening;

[0010] A first electrode layer, the first electrode layer is located between the substrate and the pixel definition layer, and a portion of the first electrode layer is exposed in the first opening;

[0011] A light-emitting functional layer, which is disposed on a side of the first electrode layer away from the substrate and is at least partially located in the first opening;

[0012] A sub-pixel definition layer, which is arranged on a side of the first electrode layer exposed in the first opening away from the substrate; the light-emitting functional layer comprises at least two sub-light-emitting functional units arranged at intervals, and two adjacent sub-light-emitting functional units are separated by the sub-pixel definition layer;

[0013] The light extraction layer is arranged on the side of the light emitting functional layer away from the substrate. The light extraction layer is arranged corresponding to the light emitting functional layer and is used to extract the large-angle light from the light emitting functional layer in a forward direction.

[0014] The present invention divides the light-emitting functional layer into multiple parts by arranging a sub-pixel defining layer on the anode layer, and arranges a light extraction layer above the light-emitting functional layer, which can effectively converge large-angle light and improve the forward light output effect.

[0015] In a feasible implementation, the orthographic projection of the light-emitting functional layer on the substrate is located within the orthographic projection of the light extraction layer on the substrate;

[0016] Preferably, the light extraction layer is configured as a convex lens convex in a direction away from the substrate.

[0017] In a feasible implementation, the light extraction layer includes a light extraction unit, and the light extraction unit is arranged corresponding to the sub-light emitting functional unit;

[0018] Preferably, the light extraction units are arranged in one-to-one correspondence with the sub-light emitting functional units;

[0019] Preferably, the orthographic projection of the sub-light emitting functional unit on the substrate is located within the orthographic projection of the light extraction unit on the substrate. Arranging multiple light extraction units in correspondence with the sub-light emitting functional units increases the effective refraction area, which is conducive to the emission of large-angle light.

[0020] In a feasible implementation, the display panel further includes an encapsulation layer, which is disposed on a side of the pixel definition layer away from the substrate and between the pixel definition layer and the light extraction layer;

[0021] Preferably, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence, and the first inorganic encapsulation layer is closer to the pixel definition layer than the second inorganic encapsulation layer. The encapsulation layer protects the film layer inside from the external environment, prolongs the service life of the display panel, and ensures the stability of the display effect.

[0022] In a feasible implementation, the display panel further includes a refractive layer, which is disposed between the first inorganic encapsulation layer and the organic encapsulation layer, and has a refractive index greater than that of the organic encapsulation layer. The refractive layer can extract the light originally in the first inorganic encapsulation layer to the interface between the refractive layer and the organic encapsulation layer, and after being reflected to the pixel definition layer, the light is emitted in the forward direction.

[0023] Preferably, the material of the refractive layer includes an organic material.

[0024] In a feasible implementation, the pixel definition layer includes a first pixel definition layer and a second pixel definition layer, the first pixel definition layer includes an end surface facing the light-emitting functional layer, and a first reflective layer is arranged on the end surface, the second pixel definition layer is arranged between the light-emitting functional layer and the first reflective layer and completely covers the first reflective layer and covers at least a part of a surface of the first pixel definition layer away from the substrate, and the second pixel definition layer includes an insulating material;

[0025] Preferably, the reflectivity of the first reflective layer is greater than or equal to 70%. By providing the first reflective layer, light can be reflected to the front view direction, and the insulating layer is provided to isolate the first electrode layer and the second electrode layer from being connected through the first reflective layer.

[0026] Preferably, the end face of the first pixel definition layer is a slope, the angle between the plane where the slope is located and the substrate is between 50° and 75°, and the height of the slope is between 3um and 5um. Compared with the prior art, the angle of the slope is increased, the height is increased, and the slope reflection is improved, and the large-angle light emitted to the slope can be reflected to the front view direction, thereby improving the forward light output.

[0027] Preferably, the sub-pixel definition layer includes a third pixel definition layer and a fourth pixel definition layer, the third pixel definition layer is disposed on the first electrode layer and between two adjacent sub-light emitting functional units, the third pixel definition layer is higher than the sub-light emitting functional units, the fourth pixel definition layer covers the third pixel definition layer, and the fourth pixel definition layer includes an insulating material;

[0028] Preferably, the third pixel definition layer is made of the same material as the first pixel definition layer; the fourth pixel definition layer is made of the same material as the second pixel definition layer. The sub-pixel definition layer and the pixel definition layer are made of the same material, which can be made synchronously to reduce process costs; on the other hand, it can achieve high consistency and a more symmetrical structure.

[0029] In a feasible implementation, the display panel further includes a second electrode layer, wherein a portion of the second electrode layer is located on a side of the light-emitting functional layer away from the substrate, and a portion of the second electrode layer is located between the encapsulation layer and the pixel definition layer;

[0030] Preferably, the first electrode layer is an anode, and the second electrode layer is a cathode.

[0031] In a feasible implementation, the display panel further includes a planarization layer, which is disposed on a side of the encapsulation layer away from the substrate and covers the encapsulation layer and the light extraction layer;

[0032] Preferably, the refractive index of the planarization layer is less than that of the light extraction layer. The refractive index of the planarization layer and the light extraction layer are matched to effectively converge large-angle light and improve the forward light extraction effect.

[0033] In a feasible implementation, the display panel further includes a reflective structure, which is disposed on a side of the first inorganic encapsulation layer away from the substrate, and the organic encapsulation layer covers the reflective structure, and the orthographic projection of the reflective structure on the substrate is staggered from the orthographic projection of the light-emitting functional layer on the substrate. Such an arrangement can reflect large-angle light and improve the forward light output effect.

[0034] Alternatively, the reflective structure is arranged on a side of the second inorganic encapsulation layer away from the substrate, and the planarization layer covers the reflective structure, and the orthographic projection of the reflective structure on the substrate is staggered with the orthographic projection of the light-emitting functional layer on the substrate;

[0035] Preferably, the reflective structure comprises a light shielding layer disposed on the second inorganic encapsulation layer and a second reflective layer covering the surface of the light shielding layer;

[0036] Preferably, the reflective structure is arranged around the light extraction layer. The reflective structure can reflect the light that the light extraction layer cannot refract, thereby improving the forward light extraction effect. The light shielding layer can reduce the crosstalk of light on the one hand, and absorb ambient light on the other hand, thereby improving the forward light extraction effect.

[0037] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0038] A display device comprises the display panel as described above.

[0039] Due to the adoption of the above technical solution, the present invention has the following advantages compared with the prior art:

[0040] 1. The present invention divides the light-emitting functional layer into multiple parts by arranging a sub-pixel defining layer on the anode layer, and arranges a light extraction layer above the light-emitting functional layer, which can effectively converge large-angle light and improve the forward light extraction effect;

[0041] 2. The present invention arranges a light extraction layer and a planarization layer on the encapsulation layer. The refractive index of the planarization layer is smaller than that of the light extraction layer, which can converge large-angle light and improve the forward light extraction effect.

[0042] 3. The present invention sets a first reflective layer on the slope of the first pixel definition layer. Compared with the conventional method, the angle is increased and the height is increased, which is conducive to improving the slope reflection, and can reflect light in the front view direction, thereby improving the forward light output effect;

[0043] 4. The present invention sets a refractive layer on the first inorganic encapsulation layer, which can extract the light originally in the first inorganic encapsulation layer to the interface between the refractive layer and the organic encapsulation layer, and then reflect it to the slope of the pixel definition layer, and then emit the light in the forward direction, thereby improving the forward light emission effect;

[0044] 5. The present invention can design the segmentation form according to the specific sub-light-emitting functional units, which can further increase the lifting effect;

[0045] 6. The present invention is provided with a reflective structure, which can reflect light at a large angle and improve the forward light output effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the display panel structure in the prior art;

[0047] Figure 2 is a schematic structural diagram of a display panel of Example 1;

[0048] Figure 3 This is a schematic diagram of the division of the neutron light-emitting functional units in Example 1;

[0049] Figure 4 Other schematic diagrams for the division of sub-light-emitting functional units;

[0050] Figure 5 is a schematic structural diagram of a display panel according to Embodiment 2;

[0051] Figure 6 is a schematic structural diagram of a display panel according to Embodiment 3;

[0052] Figure 7 is a schematic structural diagram of a display panel according to Embodiment 4;

[0053] Figure 8 is a schematic structural diagram of a display panel according to Embodiment 5;

[0054] Fig. 9 is a schematic diagram of a deformed structure of a display panel according to Embodiment 5;

[0055] Fig.10 is a schematic structural diagram of a display panel according to Embodiment 6;

[0056] Fig.11 The display panel of Example 3 and Figure 1 A comparison chart of the brightness trends of display panels is shown.

[0057] Among them, 1. pixel definition layer; 100. first pixel definition layer; 110. second pixel definition layer; 120; first reflective layer; 130. sub-pixel definition layer; 131. third pixel definition layer; 132. fourth pixel definition layer; 140. first opening; 2. encapsulation layer; 21. first inorganic encapsulation layer; 22. organic encapsulation layer; 23. second inorganic encapsulation layer; 3. first electrode layer; 4. light-emitting functional layer; 41. sub-light-emitting functional unit; 5. light extraction layer; 51. light extraction unit; 6. planarization layer; 7. refractive layer; 8. reflective structure; 81. shading layer; 82. second reflective layer; 9. second electrode layer; 10. substrate. DETAILED DESCRIPTION

[0058] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0059] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In this application, " / " means "or".

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0062] Since OLED emits light in all directions, light at large angles cannot be emitted normally due to reflection and refraction at the film interface. As a result, there is a problem of less forward emitted light and low forward brightness. How to improve the light output efficiency has become a problem that needs to be continuously broken through.

[0063] like Figure 1 As shown, in the prior art, the forward light emission rate is usually improved by setting a pixel definition layer 1 and an encapsulation layer 2. However, since the light is emitted in all directions, light at a large angle cannot be emitted normally due to reflection and refraction at the film interface, resulting in less forward light.

[0064] On this basis, in order to be able to gather large-angle light and improve the forward light emission effect, the present invention provides a display panel and a display device. A display panel includes:

[0065] substrate;

[0066] A pixel definition layer, which is disposed on one side of the substrate and defines a first opening;

[0067] A first electrode layer, the first electrode layer is located between the substrate and the pixel definition layer, and a portion of the first electrode layer is exposed in the first opening;

[0068] A light-emitting functional layer, which is disposed on a side of the first electrode layer away from the substrate and is at least partially located in the first opening;

[0069] A sub-pixel definition layer, which is arranged on a side of the first electrode layer exposed in the first opening away from the substrate; the light-emitting functional layer comprises at least two sub-light-emitting functional units arranged at intervals, and two adjacent sub-light-emitting functional units are separated by the sub-pixel definition layer;

[0070] The light extraction layer is arranged on the side of the light emitting functional layer away from the substrate. The light extraction layer is arranged corresponding to the light emitting functional layer and is used to extract the large-angle light from the light emitting functional layer in a forward direction.

[0071] The present invention divides the light-emitting functional layer into multiple parts by arranging a sub-pixel defining layer on the anode layer, and arranges a light extraction layer above the light-emitting functional layer, which can effectively converge large-angle light and improve the forward light output effect.

[0072] The present invention is described in detail below with reference to specific embodiments.

[0073] Example 1

[0074] The display panel of this embodiment may include a display area and a non-display area arranged outside the display area. The display area may have various suitable shapes, such as a circular shape, an elliptical shape or a polygonal shape. The display area is an area for displaying an image, and may include a light-emitting structure. The non-display area is an area not designed to provide an image, and a pad connected to a driver integrated circuit (IC) or a printed circuit board may be arranged in the non-display area.

[0075] like Figure 2-4 As shown, specifically, the display panel of this embodiment may include a substrate 10, a pixel definition layer 1, a sub-pixel definition layer 130, a first electrode layer 3, a light-emitting functional layer 4, a second electrode layer 9, an encapsulation layer 2, a lens layer 5, and a planarization layer 6.

[0076] In the present embodiment, the substrate 10 may include glass and / or polymer resin.

[0077] This embodiment may further include a thin film transistor disposed on the substrate 10 and a planarization layer disposed on the thin film transistor.

[0078] In this embodiment, the pixel definition layer 1 is disposed on one side of the substrate 10 and defines a first opening 140, the first electrode layer 3 is located between the substrate 10 and the pixel definition layer 1, and a portion of the first electrode layer 2 is exposed in the first opening 140, the pixel definition layer 1 can cover the end of the first electrode layer 3, and the light-emitting functional layer 4 is disposed on a side of the first electrode layer 2 away from the substrate 10 and located in the first opening 140. The light-emitting functional layer 4 includes an electron transport layer, a hole transport layer, a light-emitting material layer, etc.

[0079] In this embodiment, the sub-pixel definition layer 130 is arranged on the side of the first electrode layer 3 exposed in the first opening 140 away from the substrate 10, and the light-emitting functional layer 4 includes at least two sub-light-emitting functional units 41 arranged at intervals, and two adjacent sub-light-emitting functional units 41 are separated by the sub-pixel definition layer 130.

[0080] Figure 3-4 The schematic diagram of the shape of the sub-pixel definition layer 130 dividing the light-emitting functional layer 4. Figure 4 (a) The shape of the display sub-light emitting functional unit 41 may be a triangle, Figure 4 (b) The shape of the display sub-light emitting functional unit 41 may be circular, Figure 4 (c) The shape of the display sub-light-emitting functional unit 41 can be a field shape, etc., and the segmentation form can be designed according to the specific size of the sub-light-emitting functional unit 41, which can further increase the lifting effect.

[0081] In this embodiment, the light extraction layer 5 is arranged on the side of the light emitting functional layer 4 away from the substrate 10, and the light extraction layer 5 is arranged corresponding to the light emitting functional layer 4, and is used to positively extract the large-angle light of the light emitting functional layer 4. Specifically, the light extraction layer 5 is arranged as a convex lens convex in the direction away from the substrate 10, and the orthographic projection of the light emitting functional layer 4 on the substrate 10 is located within the orthographic projection of the light extraction layer 5 on the substrate 10.

[0082] In this embodiment, the planarization layer 6 is arranged on the side of the encapsulation layer 2 away from the substrate 10, and completely covers the encapsulation layer 2 and the light extraction layer 5. Specifically, the planarization layer 6 is made of a low-refractive index photoresist material, and completely covers the second inorganic encapsulation layer 23 and the light extraction layer 5. The light extraction layer 5 is patterned into a lens shape using a high-refractive index photoresist material, and the refractive index of the planarization layer 6 is less than the refractive index of the light extraction layer 5. The refractive index of the planarization layer 6 and the light extraction layer 5 are matched to effectively converge large-angle light and improve the forward light extraction effect.

[0083] In this embodiment, the encapsulation layer 2 is arranged on the side of the pixel definition layer 1 away from the substrate 10, and is located between the pixel definition layer 1 and the light extraction layer 5, completely covering the pixel definition layer 1 and the light emitting functional layer 4. Specifically, the encapsulation layer 2 includes a first inorganic encapsulation layer 21, an organic encapsulation layer 22, and a second inorganic encapsulation layer 23 stacked in sequence, the first inorganic encapsulation layer 21 is closer to the pixel definition layer 1 than the second inorganic encapsulation layer 23, and the light extraction layer 5 is arranged on the second inorganic encapsulation layer 23.

[0084] In this embodiment, the second electrode layer 9 is partially located on the side of the light-emitting functional layer 4 away from the substrate 10, and partially located between the encapsulation layer 2 and the pixel definition layer 1. Specifically, the first electrode layer 3 is an anode, and the second electrode layer 9 is a cathode.

[0085] In this embodiment, the large-angle light emitted by the sub-light-emitting functional unit 41 can be refracted through the convex lens structure of the light extraction layer 5, and then emitted in the forward direction, thereby improving the forward light emission effect.

[0086] In this embodiment, the light-emitting functional layer 4 is divided into multiple parts by disposing a sub-pixel defining layer 130 on the anode layer, and a light extraction layer 5 is disposed above the light-emitting functional layer 4, which can effectively converge large-angle light and improve the forward light output effect.

[0087] Example 2

[0088] like Figure 5 As shown, this embodiment further improves the structure based on the embodiment 1.

[0089] The light extraction layer 5 of this embodiment includes light extraction units 51, and the light extraction units 51 are arranged corresponding to the sub-light emitting functional units 41. Specifically, the light extraction units 51 and the sub-light emitting functional units 41 are arranged one by one.

[0090] In this embodiment, the orthographic projection of the sub-light emitting functional unit 41 on the substrate 10 is located within the orthographic projection of the light extraction unit 51 on the substrate 10. Other structures of this embodiment are the same or similar to those of the first embodiment.

[0091] In this embodiment, the large-angle light emitted by the sub-light-emitting functional unit 41 can be refracted through the convex lens structure of the light extraction unit 51, and then emitted in the forward direction, thereby improving the forward light emission effect.

[0092] In this embodiment, a plurality of light extraction units 51 are arranged in one-to-one correspondence with the sub-light emitting functional units 41, so that the effective refraction area becomes larger, which is beneficial to the emission of large-angle light and improves the forward light emission effect.

[0093] Example 3

[0094] like Figure 6As shown, this embodiment further improves the structure based on the embodiment 2.

[0095] Specifically, the pixel definition layer 1 includes a first pixel definition layer 100 and a second pixel definition layer 110. The first pixel definition layer 100 is arranged in the non-display area and includes an end portion extending toward the first opening 140. The end portion of the first pixel definition layer 100 covers the end portion of the first electrode layer 3 and a gap is arranged between the first pixel definition layer 4 and the end face of the end portion of the first pixel definition layer 100 is a slope surface. The first pixel definition layer 100 can be an organic material and / or an inorganic material. In this embodiment, a first reflective layer 120 is arranged on the slope surface of the first pixel definition layer 100. The first reflective layer 120 completely covers the slope surface of the first pixel definition layer 100 and a gap is arranged between the first pixel definition layer 100 and the light emitting function layer 4. The first reflective layer 120 forms a continuous curved surface surrounding the pixel light emitting area. The first reflective layer 120 can be a metal or other reflective material, and the reflectivity of the first reflective layer 120 is greater than or equal to 70%. By arranging the first reflective layer 120, more large-angle light can be reflected to the front view direction, thereby improving the forward light output.

[0096] In this embodiment, the angle α between the plane where the slope of the first pixel definition layer 100 is located and the substrate 10 is between 50° and 75°, and the height H of the slope is between 3um and 5um. Compared with the prior art, the angle of the slope is increased and the height is increased, which can improve the slope reflection and reflect the large-angle light emitted to the slope in the front view direction, thereby improving the forward light output.

[0097] The second pixel definition layer 110 is disposed between the light-emitting functional layer 4 and the first reflective layer 120 and completely covers the first reflective layer and at least a portion of the first pixel definition layer on a side surface away from the substrate. Specifically, one end of the second pixel definition layer 110 completely covers the reflective layer 120 and the other end extends toward the non-display area to completely cover the first pixel definition layer 100. The second pixel definition layer 110 includes an insulating material, which may be an organic or inorganic insulating material. In this embodiment, the second pixel definition layer 110 is disposed as an insulating layer to isolate the first electrode layer 3 and the second electrode layer 9 from being connected to the slope metal through the first reflective layer 120.

[0098] The sub-pixel definition layer 130 includes a third pixel definition layer 131 and a fourth pixel definition layer 132. The third pixel definition layer 131 is disposed on the first electrode layer 3 and between two adjacent sub-light-emitting functional units 41. The upper surface of the third pixel definition layer 131 is higher than the upper surface of the sub-light-emitting functional unit 41. The end surface of the third pixel definition layer 131 facing the sub-light-emitting functional unit 41 is set as a slope surface. The orthographic projection of the upper surface of the third pixel definition layer 131 on the substrate 10 is located within the range of the orthographic projection of the lower surface of the third pixel definition layer 131 on the substrate 10 and does not overlap. The fourth pixel definition layer 132 covers the third pixel definition layer 131, and the fourth pixel definition layer 132 includes an insulating material. The third pixel definition layer 131 and the first pixel definition layer 100 can be made of the same material, and the fourth pixel definition layer 132 and the second pixel definition layer 110 can be made of the same material. During the preparation, the third pixel definition layer 131 and the first pixel definition layer 100 can be manufactured together, and the fourth pixel definition layer 132 and the second pixel definition layer 110 can be manufactured together, so as to reduce the process cost.

[0099] The other structures of this embodiment are the same or similar to those of Embodiment 2.

[0100] In this embodiment, the lateral light emitted by the sub-light emitting functional unit 41 can be reflected by the first reflective layer 120 and then emitted in the forward direction, thereby improving the forward light emission effect.

[0101] Example 4

[0102] like Figure 7 As shown, this embodiment further improves the structure based on the embodiment 3.

[0103] The display panel of this embodiment includes a refractive layer 7. Specifically, the refractive layer 7 is disposed between the first inorganic encapsulation layer 21 and the organic encapsulation layer 22. The refractive layer 7 is made of a material with a high refractive index, including an organic material. Furthermore, the refractive index of the refractive layer 7 is greater than that of the organic encapsulation layer 22.

[0104] In this embodiment, the light emitted by the sub-light emitting functional unit 41 can be totally reflected by the refractive layer 7 to the first reflective layer 120, and then reflected by the first reflective layer 120, and then emitted in the forward direction, thereby improving the forward light emission effect.

[0105] The refractive layer 7 provided in this embodiment can extract the light originally in the first inorganic encapsulation layer 21 to the interface between the refractive layer 7 and the organic encapsulation layer 22, and then reflect it to the first reflective layer 120 provided on the slope of the first pixel definition layer 100, and then reflect the light forward to improve the light emission effect.

[0106] The other structures of this embodiment are the same or similar to those of Embodiment 3.

[0107] Example 5

[0108] like Figure 8 As shown, this embodiment is further improved on the basis of embodiment 3.

[0109] The display panel of this embodiment includes a reflective structure 8. Specifically, the reflective structure 8 is arranged on a side of the first inorganic encapsulation layer 21 away from the substrate 10, and the organic encapsulation layer 22 covers the reflective structure 8, and the orthographic projection of the reflective structure 8 on the substrate 10 is staggered from the orthographic projection of the light-emitting functional layer 4 on the substrate 10. The end face of the reflective structure 8 is set as a slope face, and the orthographic projection of the upper surface of the reflective structure 8 on the substrate 10 is located within the range of the orthographic projection of the lower surface of the reflective structure 8 on the substrate 10 and does not overlap.

[0110] In this embodiment, the light emitted by the sub-light emitting functional unit 41 can be reflected by the reflective structure 8 and then emitted in the forward direction, thereby improving the forward light emitting effect.

[0111] In this embodiment, the reflective structure 8 is disposed on the first inorganic packaging layer 21 , which can reflect light at a large angle and improve the forward light output effect.

[0112] Fig. 9 As a variation of this embodiment, the reflective structure 8 is disposed on the side of the second inorganic encapsulation layer 23 away from the substrate 10, and the planarization layer 6 covers the reflective structure 8, the reflective structure 8 surrounds the lens-shaped light extraction layer 5, and the orthographic projection of the reflective structure 8 on the substrate 10 is staggered from the orthographic projection of the light-emitting functional layer 4 on the substrate 10. The end face of the reflective structure 8 is set as a slope face, and the orthographic projection of the upper surface of the reflective structure 8 on the substrate 10 is located within the range of the orthographic projection of the lower surface of the reflective structure 8 on the substrate 10 and does not overlap.

[0113] The other structures of this embodiment are the same or similar to those of Embodiment 3.

[0114] In this embodiment, the light emitted by the sub-light emitting functional unit 41 can be reflected by the reflective structure 8 and then emitted in the forward direction, thereby improving the forward light emitting effect.

[0115] In this embodiment, the reflective structure 8 is disposed on the second inorganic packaging layer 23 , which can reflect light at a large angle and improve the forward light output effect.

[0116] Example 6

[0117] like Fig.10 As shown, in this embodiment Fig. 9 Further improvements are made on the basis of the embodiment shown.

[0118] Specifically, the reflective structure 8 of this embodiment includes a light shielding layer 81 disposed on the second inorganic encapsulation layer 23 and a second reflective layer 82 covering the light shielding layer 81. The end face of the light shielding layer 81 is set as a slope surface, the orthographic projection of its upper surface on the substrate 10 is located within the range of the orthographic projection of its lower surface on the substrate 10 and does not overlap, and the second reflective layer 82 completely covers the surface of the light shielding layer 81.

[0119] In this embodiment, the light emitted by the sub-light emitting functional unit 41 can be reflected by the second reflective layer 82 and then emitted in the forward direction, thereby improving the forward light emitting effect.

[0120] In this embodiment, the shading layer can reduce light crosstalk on the one hand, and absorb ambient light on the other hand. The second reflective layer 82 can reflect light at a large angle. The shading layer cooperates with the second reflective layer 82 to improve the forward light output effect.

[0121] The other structures of this embodiment are the same or similar to those of Embodiment 3.

[0122] Contrast effect

[0123] like Fig.11 As shown, the display panel and Figure 1 A comparison chart of brightness trends of display panels in the prior art is shown.

[0124] The results show that: taking blue light as an example, the display panel of Example 3 of the present invention has a forward brightness increased by 72% compared with the display panel of the prior art.

[0125] Example 7

[0126] This embodiment provides a display device, which includes any of the display panels described above. Therefore, the display device has all the beneficial effects described in any of the display panels described above, which will not be described in detail here.

[0127] Among them, the display device can be any product or component with a display function, such as televisions, laptops, handheld devices (smart phones, tablets, etc.), wearable devices (smart bracelets, wireless headphones, smart watches, smart glasses, etc.), vehicle-mounted equipment (navigation devices, assisted reversing systems, driving recorders, car refrigerators, etc.), virtual reality equipment, terminal devices, etc., without limitation here.

[0128] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0129] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: base(10); A pixel definition layer (1), the pixel definition layer (1) being arranged on one side of the substrate (10) and defining a first opening (140); A first electrode layer (3), the first electrode layer (3) being located between the substrate (10) and the pixel definition layer (1), and a portion of the first electrode layer (3) being exposed in the first opening (140); a light-emitting functional layer (4), the light-emitting functional layer (4) being arranged on a side of the first electrode layer (3) away from the substrate (10) and at least partially located in the first opening (140); a sub-pixel definition layer (130), the sub-pixel definition layer (130) being arranged on a side of the first electrode layer (3) exposed in the first opening (140) away from the substrate (10); the light-emitting functional layer (4) comprising at least two sub-light-emitting functional units (41) arranged at intervals, and two adjacent sub-light-emitting functional units (41) being separated by the sub-pixel definition layer (130); A light extraction layer (5), wherein the light extraction layer (5) is arranged on a side of the light-emitting functional layer (4) away from the substrate (10), and the light extraction layer (5) is arranged corresponding to the light-emitting functional layer (4) and is used to extract large-angle light from the light-emitting functional layer (4) in a forward direction.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the light-emitting functional layer (4) on the substrate (10) is located within the orthographic projection of the light extraction layer (5) on the substrate (10); Preferably, the light extraction layer (5) is configured as a convex lens that bulges in a direction away from the substrate (10).

3. The display panel according to claim 2, characterized in that: The light extraction layer (5) comprises a light extraction unit (51), and the light extraction unit (51) is arranged corresponding to the sub-light emitting functional unit (41); Preferably, the light extraction unit (51) and the sub-light emitting functional unit (41) are arranged in a one-to-one correspondence; Preferably, the orthographic projection of the sub-light-emitting functional unit (41) on the substrate (10) is located within the orthographic projection of the light extraction unit (51) on the substrate (10).

4. The display panel according to claim 1, characterized in that: The display panel further comprises an encapsulation layer (2), wherein the encapsulation layer (2) is arranged on a side of the pixel definition layer (1) away from the substrate (10), and is located between the pixel definition layer (1) and the light extraction layer (5); Preferably, the encapsulation layer (2) comprises a first inorganic encapsulation layer (21), an organic encapsulation layer (22) and a second inorganic encapsulation layer (23) stacked in sequence, and the first inorganic encapsulation layer (21) is closer to the pixel definition layer (1) than the second inorganic encapsulation layer (23).

5. The display panel according to claim 4, characterized in that: The display panel further comprises a refractive layer (7), wherein the refractive layer (7) is arranged between the first inorganic encapsulation layer (21) and the organic encapsulation layer (22), and the refractive index of the refractive layer (7) is greater than the refractive index of the organic encapsulation layer (22). Preferably, the material of the refractive layer (7) comprises organic material.

6. The display panel according to claim 1, characterized in that: The pixel definition layer (1) comprises a first pixel definition layer (100) and a second pixel definition layer (110), the first pixel definition layer (100) comprising an end surface facing the light-emitting functional layer (4), a first reflective layer (120) being arranged on the end surface, the second pixel definition layer (110) being arranged between the light-emitting functional layer (4) and the first reflective layer (120) and completely covering the first reflective layer (120) and covering at least a portion of a surface of a side of the first pixel definition layer (100) away from the substrate (10), and the second pixel definition layer (110) comprising an insulating material; Preferably, the reflectivity of the first reflective layer (120) is greater than or equal to 70%. Preferably, the end face of the first pixel definition layer (100) is a slope face, the angle between the plane where the slope face is located and the substrate (10) is between 50° and 75°, and the height of the slope face is between 3um and 5um. Preferably, the sub-pixel definition layer (130) comprises a third pixel definition layer (131) and a fourth pixel definition layer (132), the third pixel definition layer (131) is arranged on the first electrode layer (3) and is located between the two adjacent sub-light-emitting functional units (41), the third pixel definition layer (131) is higher than the sub-light-emitting functional units (41), the fourth pixel definition layer (132) covers the third pixel definition layer (131), and the fourth pixel definition layer (132) comprises an insulating material; Preferably, the third pixel definition layer (131) is made of the same material as the first pixel definition layer (100); and the fourth pixel definition layer (132) is made of the same material as the second pixel definition layer (110).

7. The display panel according to claim 4, characterized in that: The display panel further comprises a second electrode layer (9), wherein the second electrode layer (9) is partially located on a side of the light-emitting functional layer (4) away from the substrate (10), and partially located between the encapsulation layer (2) and the pixel definition layer (1); Preferably, the first electrode layer (3) is an anode, and the second electrode layer (9) is a cathode.

8. The display panel according to claim 4, characterized in that: The display panel further comprises a planarization layer (6), wherein the planarization layer (6) is arranged on a side of the encapsulation layer (2) away from the substrate (10) and covers the encapsulation layer (2) and the light extraction layer (5); Preferably, the refractive index of the planarization layer (6) is smaller than the refractive index of the light extraction layer (5).

9. The display panel according to claim 4, characterized in that: The display panel further comprises a reflective structure (8), the reflective structure (8) being arranged on a side of the first inorganic encapsulation layer (21) away from the substrate (10), and the organic encapsulation layer (22) covering the reflective structure (8), and an orthographic projection of the reflective structure (8) on the substrate (10) is staggered from an orthographic projection of the light-emitting functional layer (4) on the substrate (10); Alternatively, the reflective structure (8) is arranged on a side of the second inorganic encapsulation layer (23) away from the substrate (10), and the planarization layer (6) covers the reflective structure (8), and the orthographic projection of the reflective structure (8) on the substrate (10) is staggered from the orthographic projection of the light-emitting functional layer (4) on the substrate (10); Preferably, the reflective structure (8) comprises a light shielding layer (81) arranged on the second inorganic encapsulation layer (23) and a second reflective layer (82) covering the surface of the light shielding layer (81); Preferably, the reflective structure (8) is arranged around the light extraction layer (5).

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

Images