Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel comprises: a substrate; a light emitting layer located on the substrate, the light emitting layer comprising a plurality of light emitting units; a light correction layer located on the side of the light emitting layer away from the substrate, the light correction layer comprising a correction part layer, the correction part layer comprising a first correction part and a second correction part, in a direction perpendicular to the thickness of the display panel, the second correction part is located on at least one side of the first correction part; wherein the orthographic projection of the first correction part on the substrate and the orthographic projection of the light emitting unit on the substrate at least partially overlap, and the refractive index of the first correction part and the refractive index of the second correction part are different. The present application can change the light emitting route, thereby improving the light emitting efficiency of the display panel, and improving the display effect and service life of the display panel.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display panels have advantages such as high color gamut, flexibility, and fast response speed, and their market share is increasing year by year. Users have higher and higher requirements for the display effect of OLED panels. However, OLED display panels include light-emitting devices and multiple film layers arranged on the light-emitting side of the light-emitting devices. Each film layer has different absorbance and refractive index, which affects the light-emitting efficiency of the light-emitting devices. Summary of the invention

[0003] Embodiments of the present application provide a display panel and a display device, aiming to improve the light extraction efficiency of the display panel.

[0004] An embodiment of the first aspect of the present application provides a display panel, which includes: a substrate; a light-emitting layer located on the substrate, the light-emitting layer including a plurality of light-emitting units; a light correction layer located on a side of the light-emitting layer away from the substrate, the light correction layer including a correction portion layer, the correction portion layer including a first correction portion and a second correction portion, and the second correction portion is located on at least one side of the first correction portion in a direction perpendicular to a thickness direction of the display panel; wherein an orthographic projection of the first correction portion on the substrate and an orthographic projection of the light-emitting unit on the substrate are at least partially overlapped, and a refractive index of the first correction portion and a refractive index of the second correction portion are different.

[0005] According to an implementation of the first aspect of the present application, the second corrective portion is arranged around the first corrective portion.

[0006] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection of the first correcting portion on the substrate is located within the orthographic projection of the light-emitting unit on the substrate.

[0007] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection center of the first correcting portion on the substrate and the orthographic projection center of the light-emitting unit on the substrate are arranged to overlap.

[0008] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projection edge of the first correcting portion on the substrate and the orthographic projection edge of the light-emitting unit on the substrate are arranged at equal intervals.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, an orthographic projection edge of the second correcting portion on the substrate is arranged at an equal distance from an orthographic projection edge of the first correcting portion on the substrate.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, there are multiple second correcting parts, the multiple second correcting parts are nested with each other, and the refractive indices of the multiple second correcting parts are different.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the refractive index of the first correcting portion is greater than the refractive index of the second correcting portion, and the refractive index of the plurality of second correcting portions tends to decrease along the direction from the first correcting portion to the second correcting portion.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, the refractive index of the first correcting portion is smaller than the refractive index of the second correcting portion, and the refractive index of the plurality of second correcting portions tends to increase along the direction from the first correcting portion to the second correcting portion.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, a plurality of second correcting portions are arranged at equal intervals on the edges of the orthographic projection on the substrate.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, the light-emitting unit includes a first light-emitting unit and a second light-emitting unit arranged adjacent to each other along a first direction, the first light-emitting unit is used to emit blue light, and the second light-emitting unit is used to emit green light or red light;

[0015] Along the first direction, there is a first spacing between the first correcting portion and the second correcting portion corresponding to the first light-emitting unit, and there is a second spacing between the first correcting portion and the second correcting portion corresponding to the second light-emitting unit, and the first spacing is greater than the second spacing.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the number of second corrective parts corresponding to the first light-emitting units is greater than the number of second corrective parts corresponding to the second light-emitting units.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, the light correction layer also includes: a first auxiliary layer, located on the side of the correction part layer away from the light-emitting layer, and the refractive index of the first auxiliary layer is greater than or equal to the refractive index of the larger one between the first correction part and the second correction part.

[0018] According to any of the aforementioned embodiments of the first aspect of the present application, the light correction layer further includes a second auxiliary layer located on a side of the first auxiliary layer away from the correction layer, and the refractive index of the second auxiliary layer is smaller than that of the first auxiliary layer.

[0019] According to any of the aforementioned embodiments of the first aspect of the present application, the refractive index of the first correcting part is greater than the refractive index of the second correcting part, and the light correction layer also includes a third auxiliary layer, which is arranged between the light-emitting layer and the correcting part layer, and the refractive index of the third auxiliary layer is greater than or equal to the refractive index of the first correcting part.

[0020] According to any of the aforementioned embodiments of the first aspect of the present application, the light correction layer further includes a fourth auxiliary layer, which is disposed between the third auxiliary layer and the light-emitting layer, and the refractive index of the fourth auxiliary layer is smaller than the refractive index of the third auxiliary layer.

[0021] According to any of the aforementioned embodiments of the first aspect of the present application, the refractive index of the first correcting part is less than the refractive index of the second correcting part, and the light correction layer also includes a fifth auxiliary layer, which is arranged between the light-emitting layer and the correcting part layer, and the refractive index of the fifth auxiliary layer is less than or equal to the refractive index of the first correcting part.

[0022] According to any of the aforementioned embodiments of the first aspect of the present application, the number of layers of the fifth auxiliary layer is two or more.

[0023] According to any of the aforementioned embodiments of the first aspect of the present application, it also includes: an encapsulation layer, which is arranged on the side of the light-emitting unit away from the substrate, and the encapsulation layer includes a first inorganic layer, a first organic layer, and a second inorganic layer stacked in sequence in a direction away from the light-emitting layer, and the correction layer is reused as the first organic layer.

[0024] According to any of the aforementioned embodiments of the first aspect of the present application, the refractive index of the second inorganic layer is greater than or equal to the refractive index of the first organic layer.

[0025] An embodiment of a second aspect of the present application provides a display device, which includes a display panel according to any of the above embodiments.

[0026] In the display panel of the embodiment of the present application, the display panel includes a substrate, a light emitting unit located on the substrate, and a light correction layer. The light correction layer includes a first correction part and a second correction part, and the orthographic projection of the first correction part on the substrate and the orthographic projection of the light emitting unit on the substrate at least partially overlap, so that the light emitted by the light emitting unit can pass through the first correction part. The second correction part is provided on at least one side of the first correction part, and the refractive indexes of the first correction part and the second correction part are different. A vertical reflection surface consistent with the emission direction can be formed between the first correction part and the second correction part, and the reflection surface can reflect the emitted light of the light emitting unit, so that more emitted light is emitted from directly above the light emitting unit, which can change the light emission route, thereby improving the light emission efficiency of the display panel, and improving the display effect and service life of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0028] Figure 1 A schematic top view of a display panel according to an embodiment of the present application is shown;

[0029] Figure 2 An example is shown Figure 1 A partial magnified image of the middle Q region;

[0030] Figure 3 In one embodiment, Figure 2 Sectional view at AA in the middle;

[0031] Figure 4 Show Figure 3 A top view of

[0032] Figure 5 In one embodiment, Figure 2 Sectional view at the middle BB;

[0033] Figure 6 In yet another embodiment, Figure 2 Sectional view at AA in the middle;

[0034] Figure 7 In another embodiment, Figure 2 Sectional view at AA in the middle;

[0035] Figure 8 In yet another embodiment, Figure 2 Sectional view at AA in the middle;

[0036] Fig. 9 In yet another embodiment, Figure 2 Sectional view at AA in the middle;

[0037] Fig.10 In yet another embodiment, Figure 2 Cross-sectional view at AA in the middle.

[0038] 100, display panel; 110, sub-pixel; 111, red sub-pixel; 112, green sub-pixel; 113, blue sub-pixel;

[0039] 10. Substrate;

[0040] 20. Light-emitting unit; 21. First light-emitting unit; 22. Second light-emitting unit;

[0041] 30. Correction layer; 31. First correction part; 32. Second correction part; 33. Reflection surface;

[0042] 40. The first auxiliary layer;

[0043] 50. Second auxiliary layer;

[0044] 60. The third auxiliary layer;

[0045] 70. Fourth auxiliary layer;

[0046] 80. Fifth auxiliary layer;

[0047] 90, encapsulation layer; 91, first inorganic layer; 92, first organic layer; 93, second inorganic layer;

[0048] AA, display area; NA, non-display area; X, first direction; Z, thickness direction. DETAILED DESCRIPTION

[0049] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0050] 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 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 a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0051] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0052] An embodiment of the present application provides a display panel, which may be an organic light emitting diode (OLED) display panel.

[0053] Figure 1 FIG. 1 is a schematic top view of a display panel according to an embodiment of the present application. Figure 2 An example is shown Figure 1 A partial enlarged view of the middle Q region.

[0054] like Figure 1 and Figure 2 As shown, according to the display panel 100 of the embodiment of the present application, the display panel 100 includes a display area AA and a non-display area NA. In other embodiments, the display panel 100 may be a display panel for full-screen display, and the display panel 100 includes the display area AA. The display panel 100 includes a plurality of sub-pixels 110, and the plurality of sub-pixels 110 are, for example, red sub-pixels 111, blue sub-pixels 113, and green sub-pixels 112. In other embodiments, the plurality of sub-pixels 110 also include, for example, yellow sub-pixels.

[0055] Please also read Figures 1 to 3 , Figure 3 Show Figure 2 Partial cross-sectional view at AA in the middle.

[0056] like Figures 1 to 3 As shown, according to the display panel 100 of the embodiment of the present application, the display panel 100 includes: a substrate 10; a light-emitting layer, located on the substrate 10, the light-emitting layer includes a plurality of light-emitting units 20; a light correction layer, located on the side of the light-emitting layer away from the substrate 10, the light correction layer includes a correction portion layer 30, the correction portion layer 30 includes a first correction portion 31 and a second correction portion 32, in a direction perpendicular to the thickness direction of the display panel 100, the second correction portion 32 is located on at least one side of the first correction portion 31; wherein the orthographic projection of the first correction portion 31 on the substrate 10 and the orthographic projection of the light-emitting unit 20 on the substrate 10 at least partially overlap, and the refractive index of the first correction portion 31 is different from the refractive index of the second correction portion 32.

[0057] The direction perpendicular to the thickness direction of the display panel 100 is, for example, any direction on the plane where the display panel 100 is located.

[0058] In the display panel 100 of the embodiment of the present application, the display panel 100 includes a substrate 10, a light emitting unit 20 located on the substrate 10, and a light correction layer. The light correction layer includes a correction part layer 30, and the correction part layer 30 includes a first correction part 31 and a second correction part 32. The orthographic projection of the first correction part 31 on the substrate 10 and the orthographic projection of the light emitting unit 20 on the substrate 10 at least partially overlap, so that the light emitted by the light emitting unit 20 can pass through the first correction part 31. The second correction part 32 is provided on at least one side of the first correction part 31, and the refractive indexes of the first correction part 31 and the second correction part 32 are different. A vertical reflection surface 33 consistent with the emission direction can be formed between the first correction part 31 and the second correction part 32. The reflection surface 33 can reflect the emitted light of the light emitting unit 20, so that more emitted light is emitted from directly above the light emitting unit 20, which can change the light emission route, thereby improving the light emission efficiency of the display panel 100, and improving the display effect and service life of the display panel 100.

[0059] The substrate 10 may be made of a light-transmitting material such as glass or polyimide (PI). The sub-pixel 110 includes the above-mentioned light-emitting unit 20 and a first electrode layer and a second electrode layer located on both sides of the light-emitting unit 20 .

[0060] In some optional embodiments, according to design requirements, the light-emitting unit 20 may further include at least one of a hole injection layer, a hole transport layer, an electron injection layer or an electron transport layer.

[0061] The first electrode layer may be a light-transmitting electrode, and the first electrode layer may include an indium tin oxide (ITO) layer or an indium zinc oxide layer. Alternatively, the first electrode layer may also be a reflective electrode layer, including a first light-transmitting conductive layer, a reflective layer located on the first light-transmitting conductive layer, and a second light-transmitting conductive layer located on the reflective layer. The first light-transmitting conductive layer and the second light-transmitting conductive layer may be ITO, indium zinc oxide, etc., and the reflective layer may be a metal layer, for example, made of silver. The second electrode layer may include a magnesium-silver alloy layer.

[0062] Exemplarily, an array substrate layer may be further provided between the substrate 10 and the light emitting unit 20 . The array substrate layer may include, for example, a driving device. The driving device may include, for example, a pixel driving circuit.

[0063] Please also read Figure 3 and Figure 4 , Figure 4 yes Figure 3 Top view of the .

[0064] In some optional embodiments, such as Figure 3 and Figure 4 As shown, the second correcting portion 32 is disposed around the first correcting portion 31 .

[0065] In these optional embodiments, the second correcting portion 32 is annular, and the first correcting portion 31 is located inside the annular second correcting portion 32, so that the outgoing light rays located at different positions around the first correcting portion 31 can be reflected from the reflecting surface 33 between the first correcting portion 31 and the second correcting portion 32, thereby improving the correction effect of the correcting portion layer 30 on the light emitted by the light-emitting unit 20, thereby improving the light extraction efficiency of the display panel 100, and improving the display effect and service life of the display panel 100.

[0066] In some optional embodiments, the orthographic projection of the first correction part 31 on the substrate 10 is located within the orthographic projection of the light emitting unit 20 on the substrate 10. That is, the orthographic projection area of ​​the first correction part 31 on the substrate 10 is less than or equal to the orthographic projection area of ​​the light emitting unit 20 on the substrate 10, the first correction part 31 is located directly above the light emitting unit 20, and the reflective surfaces 33 at different circumferential positions of the first correction part 31 can receive the emitted light from the light emitting unit 20 and reflect the emitted light, which can improve the correction effect of the correction part layer 30 on the light emitted by the light emitting unit 20, thereby improving the light extraction efficiency of the display panel 100, and improving the display effect and service life of the display panel 100.

[0067] In some optional embodiments, the orthographic projection center of the first correction part 31 on the substrate 10 and the orthographic projection center of the light emitting unit 20 on the substrate 10 are overlapped. This makes the correction part layer 30 have the same light adjustment effect on the outgoing light of the light emitting unit 20 at different positions perpendicular to the thickness direction Z, reduces the difference in the amount of outgoing light in different directions, and improves the uniformity of the display effect of the display panel 100.

[0068] In some optional embodiments, the orthographic projection edge of the first correcting portion 31 on the substrate 10 and the orthographic projection edge of the light emitting unit 20 on the substrate 10 are arranged at equal intervals.

[0069] In these optional embodiments, when the orthographic projection edge of the first correcting portion 31 on the substrate 10 and the orthographic projection edge of the light emitting unit 20 on the substrate 10 are arranged at equal intervals, the orthographic projection shape of the first correcting portion 31 on the substrate 10 is similar to the orthographic projection shape of the light emitting unit 20 on the substrate 10, and the orthographic projection center of the first correcting portion 31 on the substrate 10 and the orthographic projection center of the light emitting unit 20 on the substrate 10 are arranged to overlap. This makes the light adjustment effect of the correcting portion layer 30 on the outgoing light of the light emitting unit 20 at different positions perpendicular to the thickness direction Z more consistent, reduces the difference in the amount of outgoing light in different directions, and improves the uniformity of the display effect of the display panel 100.

[0070] In some optional embodiments, the orthographic projection edge of the second correcting portion 32 on the substrate 10 and the orthographic projection edge of the first correcting portion 31 on the substrate 10 are arranged at equal intervals.

[0071] In these optional embodiments, the light emitted from the first correcting portion 31 passes through the second correcting portion 32. Since the orthographic projection edge of the second correcting portion 32 on the substrate 10 is arranged at an equal distance from the orthographic projection edge of the first correcting portion 31 on the substrate 10, that is, the sizes of the second correcting portions 32 located on different sides of the first correcting portion 31 are consistent, the adjustment effect of the second correcting portion 32 on the light emitted from the first correcting portion 31 tends to be consistent, which can reduce the difference in the amount of emitted light in different directions and improve the uniformity of the display effect of the display panel 100.

[0072] There are many ways to set the number of the second correcting portion 32 . For example, the number of the second correcting portion 32 is one, and one second correcting portion 32 is arranged around the first correcting portion 31 .

[0073] In some other optional embodiments, there are multiple second correcting parts 32, and the multiple second correcting parts 32 are mutually nested, and the refractive indexes of the multiple second correcting parts 32 are different. By providing multiple second correcting parts 32 with different refractive indices, reflective surfaces 33 can also be formed between different second correcting parts 32, and these reflective surfaces 33 can also reflect the emitted light of the light-emitting unit 20, which can further improve the adjustment effect of the correcting part layer 30 on the emitted light of the light-emitting unit 20.

[0074] When there are multiple second correcting parts 32 , there are many ways to set the refractive index of the multiple second correcting parts 32 .

[0075] In some optional embodiments, the refractive index of the first correcting portion 31 is greater than the refractive index of the second correcting portion 32 , and the refractive index of the plurality of second correcting portions 32 tends to decrease along the direction from the first correcting portion 31 to the second correcting portion 32 .

[0076] In these optional embodiments, when the refractive index of the plurality of second corrective portions 32 has a decreasing trend along the direction from the first corrective portion 31 to the second corrective portion 32, the total reflection angles of the reflective surfaces 33 of the first corrective portion 31 and the second corrective portion 32 and the reflective surfaces 33 of different second corrective portions 32 become smaller and smaller. And along the direction from the first corrective portion 31 to the second corrective portion 32, the angle between the outgoing light of the light emitting unit 20 and the contact surface becomes smaller and smaller, so the reflective surface 33 can reflect more light, which can further improve the adjustment effect of the corrective portion layer 30 on the outgoing light, and improve the light output and display effect of the display panel 100.

[0077] In some other optional embodiments, the refractive index of the first correcting portion 31 is smaller than the refractive index of the second correcting portion 32 , and the refractive index of the plurality of second correcting portions 32 tends to increase along the direction from the first correcting portion 31 to the second correcting portion 32 .

[0078] In these optional embodiments, when the emitted light of the light emitting unit 20 enters the second correcting portion 32, the angle between the emitted light of the light emitting unit 20 and the reflecting surface 33 becomes smaller and smaller along the direction from the first correcting portion 31 to the second correcting portion 32. The second correcting portion 32 can correct the light emitting direction of the light emitting unit 20, and the greater the refractive index, the greater the correction angle, which can ensure that more light is emitted from directly above the light emitting unit 20.

[0079] In some optional embodiments, a plurality of second correcting portions 32 are arranged at equal intervals on the edges of the orthographic projection on the substrate 10. This makes the adjustment effect of the second correcting portions 32 on the outgoing light at different positions tend to be consistent, can reduce the difference in the amount of outgoing light in different directions, and improve the uniformity of the display effect of the display panel 100.

[0080] Optionally, when there are multiple second correcting portions 32, the thicknesses of the multiple second correcting portions 32 may be the same or different. Figure 3 and Figure 4 As shown, there are three second correcting parts 32 , and the thickness of the two second correcting parts 32 close to the first correcting part 31 among the three second correcting parts 32 is the same, while the thickness of the second correcting part 32 sleeved on the outermost side is different from that of the other second correcting parts 32 .

[0081] See also Figure 5 , Figure 5 yes Figure 2 Cross-sectional view at BB in the middle.

[0082] In some optional embodiments, such as Figure 5 As shown, the light-emitting unit 20 includes a first light-emitting unit 21 and a second light-emitting unit 22 adjacently arranged along a first direction X. The first light-emitting unit 21 is used to emit blue light, and the second light-emitting unit 22 is used to emit green light or red light. Optionally, the first light-emitting unit 21 is used to form a blue sub-pixel 113, and the second light-emitting unit 22 is used to form a green sub-pixel 112 or a red sub-pixel 111.

[0083] Along the first direction X, there is a first distance d1 between the first correcting portion 31 and the second correcting portion 32 corresponding to the first light emitting unit 21 , and there is a second distance d2 between the first correcting portion 31 and the second correcting portion 32 corresponding to the second light emitting unit 22 . The first distance d1 is greater than the second distance d2 .

[0084] The first correcting portion 31 and the second correcting portion 32 corresponding to the first light-emitting unit 21 refer to: the first correcting portion 31 located on the first light-emitting unit 21, and the second correcting portion 32 located on one side of the first correcting portion 31. The first correcting portion 31 and the second correcting portion 32 corresponding to the second light-emitting unit 22 refer to: the first correcting portion 31 located on the second light-emitting unit 22, and the second correcting portion 32 located on one side of the first correcting portion 31.

[0085] In these optional embodiments, when the distance between the second correction part 32 and the first correction part 31 is larger, the second correction part 32 can better correct the emitted light of the corresponding light emitting unit 20. The service life and luminous efficiency of the first light emitting unit 21 for emitting blue light are lower than the service life and luminous efficiency of the second light emitting unit 22 for emitting green light or red light, and the first distance d1 is greater than the second distance d2, so that the light emitting effect of the display panel 100 is more uniform.

[0086] When there is only one second correcting portion 32, the first distance d1 can be the distance between the first correcting portion 31 and its corresponding second correcting portion 32 away from the edge of the first correcting portion 31, and the second distance d2 can be the distance between the first correcting portion 31 and its corresponding second correcting portion 32 away from the edge of the first correcting portion 31.

[0087] When there are multiple second correcting portions 32 , the first spacing d1 may be the spacing between the first correcting portion 31 and the second correcting portion 32 farthest from the first correcting portion 31 , and the second spacing d2 may be the spacing between the first correcting portion 31 and the second correcting portion 32 farthest from the first correcting portion 31 .

[0088] In some optional embodiments, the first distance d1 may be made larger than the second distance d2 by adjusting the size or number of the second correcting portions 32 .

[0089] For example, the extension dimension of the second correcting portion 32 corresponding to the first light emitting unit 21 in the first direction X is greater than the extension dimension of the second correcting portion 32 corresponding to the second light emitting unit 22 in the first direction X, so that the first interval d1 is greater than the second interval d2.

[0090] In some other optional embodiments, the number of the second correcting portions 32 corresponding to the first light-emitting units 21 is greater than the number of the second correcting portions 32 corresponding to the second light-emitting units 22 .

[0091] In these optional embodiments, the second correcting portion 32 corresponding to the first light emitting unit 21 is a second correcting portion 32 sleeved outside the corresponding first correcting portion 31, and the second correcting portion 32 corresponding to the second light emitting unit 22 is a second correcting portion 32 sleeved outside the corresponding first correcting portion 31. The number of second correcting portions 32 corresponding to the first light emitting unit 21 is relatively large, which can improve the effect of the correcting portion layer 30 adjusting the light extraction efficiency of the second light emitting unit 22, so that the light extraction efficiency of different light emitting units 20 tends to be consistent, and improves the uniformity of the display effect of the display panel 100.

[0092] See also Figure 6 , Figure 6 In another embodiment Figure 2 Cross-sectional view at AA in the middle.

[0093] In some other optional embodiments, such as Figure 6 As shown, the light correction layer also includes a first auxiliary layer 40, which is located on the side of the correction layer 30 away from the light-emitting layer, and the refractive index of the first auxiliary layer 40 is greater than or equal to the refractive index of the larger one of the first correction part 31 and the second correction part 32.

[0094] In these optional embodiments, the refractive index of the first auxiliary layer 40 is greater than or equal to the refractive index of the larger one of the first corrective portion 31 and the second corrective portion 32. When the outgoing light is incident on the first auxiliary layer 40 from the first corrective portion 31 or the second corrective portion 32, the outgoing light enters the layer structure with a larger refractive index from the layer structure material with a smaller refractive index, and the outgoing light is refracted along a normal line extending along the thickness direction Z, so that more light is emitted from directly above the light-emitting unit 20, which can further improve the light extraction efficiency of the light-emitting unit 20 and increase the light extraction amount of the display panel 100.

[0095] See also Figure 7 , Figure 7 In another embodiment Figure 2 Cross-sectional view at AA in the middle.

[0096] In some alternative embodiments, Figure 7 As shown, the light correction layer further includes a second auxiliary layer 50 , which is located on a side of the first auxiliary layer 40 away from the correction layer 30 , and the refractive index of the second auxiliary layer 50 is smaller than that of the first auxiliary layer 40 .

[0097] In these optional embodiments, when the emitted light of the light-emitting unit 20 enters the second auxiliary layer 50 via the first auxiliary layer 40, the emitted light enters the layer structure with a smaller refractive index via the layer structure with a larger refractive index, and the emitted light is deflected away from the normal extending along the thickness direction Z, which can increase the emission angle of the light-emitting unit 20 and improve the display effect of the display panel 100.

[0098] See also Figure 8 , Figure 8 In yet another embodiment Figure 2 Cross-sectional view at AA in the middle.

[0099] In some further optional embodiments, Figure 8 As shown, the refractive index of the first correcting part 31 is greater than the refractive index of the second correcting part 32 , and the light correction layer also includes a third auxiliary layer 60 , which is arranged between the light-emitting layer and the correcting part layer 30 , and the refractive index of the third auxiliary layer 60 is greater than or equal to the refractive index of the first correcting part 31 .

[0100] In these optional embodiments, the refractive index of the third auxiliary layer 60 is greater than or equal to the refractive index of the first corrective portion 31, and the refractive index of the first corrective portion 31 is greater than the refractive index of the second corrective portion 32, so the refractive index of the third auxiliary layer 60 is greater than the refractive index of the second corrective portion 32. When the outgoing light enters the second corrective portion 32 via the third auxiliary layer 60, the outgoing light enters the layer structure with a smaller refractive index from the layer structure material with a larger refractive index, and the outgoing light is refracted away from the normal extending along the thickness direction Z at the contact interface between the second corrective portion 32 and the third auxiliary layer 60, which makes it easier for the outgoing light to be totally reflected at the vertical reflection surface 33 at the edge of the second corrective portion 32, which can further improve the light extraction efficiency of the light-emitting unit 20 and the light extraction amount of the display panel 100.

[0101] Optionally, when the refractive index of the first correcting portion 31 is greater than the refractive index of the second correcting portion 32, there are multiple second correcting portions 32, and the multiple second correcting portions 32 are nested with each other, the refractive index of the multiple second correcting portions 32 tends to decrease along the direction from the first correcting portion 31 to the second correcting portion 32.

[0102] In some optional embodiments, please continue to refer to Figure 8 The light correction layer further includes a fourth auxiliary layer 70 , which is disposed between the third auxiliary layer 60 and the light-emitting layer. The refractive index of the fourth auxiliary layer 70 is less than that of the third auxiliary layer 60 .

[0103] In these optional embodiments, when the emitted light of the light-emitting unit 20 enters the third auxiliary layer 60 from the fourth auxiliary layer 70, the emitted light enters the layer structure with a larger refractive index from the layer structure material with a smaller refractive index, and the emitted light is refracted along a normal line extending along the thickness direction Z, so that more light is emitted from directly above the light-emitting unit 20, which can further improve the light output efficiency of the light-emitting unit 20 and increase the light output of the display panel 100.

[0104] Optional, please continue to Figure 8 The light correction layer also includes a first auxiliary layer 40, which is located on the side of the correction layer 30 away from the light-emitting layer. The refractive index of the first auxiliary layer 40 is greater than or equal to the refractive index of the larger one of the first correction part 31 and the second correction part 32, which can further improve the light extraction efficiency of the light-emitting unit 20 and increase the light extraction amount of the display panel 100.

[0105] Optional, please continue to Figure 8 The light correction layer also includes a second auxiliary layer 50, which is located on the side of the first auxiliary layer 40 away from the correction layer 30. The refractive index of the second auxiliary layer 50 is smaller than that of the first auxiliary layer 40, which can increase the emission angle of the light emitting unit 20 and improve the display effect of the display panel 100.

[0106] See also Fig. 9 , Fig. 9 In another embodiment Figure 2 Cross-sectional view at AA in the middle.

[0107] In some optional embodiments, such as Fig. 9 As shown, the refractive index of the first correction part 31 is less than the refractive index of the second correction part 32, and the light correction layer further includes a fifth auxiliary layer 80, which is disposed between the light-emitting layer and the correction part layer 30, and the refractive index of the fifth auxiliary layer 80 is less than or equal to the refractive index of the first correction part 31. Optionally, the number of the fifth auxiliary layer 80 may be two or more layers.

[0108] In these optional embodiments, the refractive index of the fifth auxiliary layer 80 is less than or equal to the refractive index of the first corrective portion 31, and the refractive index of the first corrective portion 31 is less than the refractive index of the second corrective portion 32, that is, the refractive index of the fifth auxiliary layer 80 is less than the refractive index of the second corrective portion 32. When the outgoing light of the light emitting unit 20 enters the second corrective portion 32 from the fifth auxiliary layer 80, the outgoing light enters the layer structure with a larger refractive index from the layer structure material with a smaller refractive index, and the outgoing light is refracted along the normal line extending along the thickness direction Z, so that more light is emitted from directly above the light emitting unit 20, which can further improve the light extraction efficiency of the light emitting unit 20 and increase the light extraction amount of the display panel 100.

[0109] Optionally, when the refractive index of the first correcting portion 31 is smaller than the refractive index of the second correcting portion 32, there are multiple second correcting portions 32, and the multiple second correcting portions 32 are nested with each other, the refractive index of the multiple second correcting portions 32 tends to increase along the direction from the first correcting portion 31 to the second correcting portion 32.

[0110] See also Fig.10 , Fig.10 In another embodiment Figure 2 Cross-sectional view at AA in the middle.

[0111] Optional, please continue to Fig. 9 The light correction layer also includes a first auxiliary layer 40, which is located on the side of the correction layer 30 away from the light-emitting layer. The refractive index of the first auxiliary layer 40 is greater than or equal to the refractive index of the larger one of the first correction part 31 and the second correction part 32, which can further improve the light extraction efficiency of the light-emitting unit 20 and increase the light extraction amount of the display panel 100.

[0112] Optional, please continue to Fig. 9 The light correction layer also includes a second auxiliary layer 50, which is located on the side of the first auxiliary layer 40 away from the correction layer 30. The refractive index of the second auxiliary layer 50 is smaller than that of the first auxiliary layer 40, which can increase the emission angle of the light emitting unit 20 and improve the display effect of the display panel 100.

[0113] In some optional embodiments, such as Fig.10 As shown, the display panel 100 also includes an encapsulation layer 90, which is arranged on the side of the light-emitting layer away from the substrate 10, and the encapsulation layer 90 includes a first inorganic layer 91, a first organic layer 92 and a second inorganic layer 93 stacked in sequence in a direction away from the light-emitting unit 20, and the correction layer 30 is reused as the first organic layer 92.

[0114] In these optional embodiments, the light correction layer is reused as the first organic layer 92. On the one hand, the number of layer structures of the display panel 100 will not be increased. On the other hand, the first organic layer 92 is prepared by inkjet printing technology, which can easily form a first correction part 31 and a second correction part 32 with different refractive indices, thereby reducing the difficulty of preparing the display panel 100.

[0115] In some optional embodiments, the refractive index of the second inorganic layer 93 is greater than or equal to the refractive index of the first organic layer 92. When the emitted light of the light emitting unit 20 is incident on the second inorganic layer 93 via the first organic layer 92, the emitted light is incident on the layer structure with a larger refractive index via the layer structure with a smaller refractive index, and the emitted light is refracted along a normal line extending along the thickness direction Z, so that more light is emitted from directly above the light emitting unit 20, which can further improve the light extraction efficiency of the light emitting unit 20 and increase the light extraction amount of the display panel 100.

[0116] Exemplarily, the display panel 100 may further include a polarizer and a cover plate located above the encapsulation layer 90 , or a cover plate may be directly disposed above the encapsulation layer 90 without the need for a polarizer. In other optional embodiments, a touch electrode may be further disposed above the encapsulation layer 90 .

[0117] Optionally, in some optional embodiments, a light extraction layer and a light modulation layer are further provided between the light emitting layer and the encapsulation layer 90 , and the light modulation layer is, for example, a lithium fluoride layer, to improve the light extraction efficiency of the display panel 100 .

[0118] The present application also provides a display device, which may include the display panel 100 of any of the above embodiments. Since the display device of the present application includes the above display panel 100, the display device of the present application has the beneficial effects of the above display panel 100, which will not be described in detail.

[0119] The display device in the embodiments of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles, and other devices with display functions.

[0120] According to the embodiments described above in the present application, these embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: include: substrate; A light-emitting layer, located on the substrate, comprising a plurality of light-emitting units; a light correction layer, located on a side of the light emitting layer away from the substrate, the light correction layer comprising a correction part layer, the correction part layer comprising a first correction part and a second correction part, and in a direction perpendicular to a thickness direction of the display panel, the second correction part is located on at least one side of the first correction part; wherein the orthographic projection of the first correcting portion on the substrate and the orthographic projection of the light-emitting unit on the substrate at least partially overlap, and the refractive index of the first correcting portion is different from the refractive index of the second correcting portion; The second correcting portion is arranged around the first correcting portion, the number of the second correcting portions is multiple, the multiple second correcting portions are mutually nested, and the refractive indexes of the multiple second correcting portions are different; The refractive index of the first correcting portion is greater than the refractive index of the second correcting portion, and the refractive index of the plurality of second correcting portions tends to decrease along a direction from the first correcting portion to the second correcting portion.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the first correcting portion on the substrate is located within the orthographic projection of the light emitting unit on the substrate.

3. The display panel according to claim 2, characterized in that: The orthographic projection center of the first correcting portion on the substrate and the orthographic projection center of the light emitting unit on the substrate are overlapped.

4. The display panel according to claim 2, characterized in that: The orthographic projection edge of the first correcting portion on the substrate and the orthographic projection edge of the light emitting unit on the substrate are arranged at equal intervals.

5. The display panel according to claim 4, characterized in that: The orthographic projection edge of the second correcting portion on the substrate is arranged at an equal distance from the orthographic projection edge of the first correcting portion on the substrate.

6. The display panel according to claim 1, characterized in that: A plurality of the second correcting portions are arranged at equal intervals on the edges of the orthographic projections on the substrate.

7. The display panel according to claim 1, characterized in that: The light-emitting unit comprises a first light-emitting unit and a second light-emitting unit adjacently arranged along a first direction, the first light-emitting unit is used to emit blue light, and the second light-emitting unit is used to emit green light or red light; Along the first direction, there is a first distance between the first correcting portion and the second correcting portion corresponding to the first light-emitting unit, and there is a second distance between the first correcting portion and the second correcting portion corresponding to the second light-emitting unit, and the first distance is greater than the second distance.

8. The display panel according to claim 7, characterized in that: The number of the second correcting parts corresponding to the first light-emitting units is greater than the number of the second correcting parts corresponding to the second light-emitting units.

9. The display panel according to claim 1, characterized in that: The light correction layer further includes: a first auxiliary layer located on a side of the correction portion layer away from the light emitting layer, wherein the refractive index of the first auxiliary layer is greater than or equal to the refractive index of the larger one of the first correction portion and the second correction portion.

10. The display panel according to claim 9, characterized in that: The light correction layer further includes a second auxiliary layer located on a side of the first auxiliary layer away from the correction layer, and the refractive index of the second auxiliary layer is smaller than the refractive index of the first auxiliary layer.

11. The display panel according to claim 1, characterized in that: The refractive index of the first correcting part is greater than the refractive index of the second correcting part. The light correcting layer further includes a third auxiliary layer disposed between the light emitting layer and the correcting part layer. The refractive index of the third auxiliary layer is greater than or equal to the refractive index of the first correcting part.

12. The display panel according to claim 11, characterized in that: The light correction layer further includes a fourth auxiliary layer disposed between the third auxiliary layer and the light emitting layer, and the refractive index of the fourth auxiliary layer is smaller than the refractive index of the third auxiliary layer.

13. The display panel according to claim 1, characterized in that: The refractive index of the first correcting part is less than that of the second correcting part. The light correcting layer further includes a fifth auxiliary layer disposed between the light emitting layer and the correcting part layer. The refractive index of the fifth auxiliary layer is less than or equal to that of the first correcting part.

14. The display panel according to claim 13, characterized in that: The fifth auxiliary layer has two or more layers.

15. The display panel according to claim 1, characterized in that: Also includes: The encapsulation layer is arranged on the side of the light-emitting layer away from the substrate, and the encapsulation layer includes a first inorganic layer, a first organic layer and a second inorganic layer stacked in sequence in a direction away from the light-emitting layer, and the correction layer is reused as the first organic layer.

16. The display panel according to claim 15, characterized in that: The refractive index of the second inorganic layer is greater than or equal to the refractive index of the first organic layer.

17. A display device, characterized in that: A display panel comprising any one of claims 1-16.

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