Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises a substrate, a light-emitting layer arranged on one side of the substrate, the light-emitting layer comprising a plurality of light-emitting sub-pixels, and an optical function layer arranged on the side of the light-emitting layer away from the substrate, the optical function layer comprising a plurality of microlens structures arranged one by one with the light-emitting sub-pixels. The plurality of microlens structures comprise a plurality of periodically arranged repeating units. The repeating unit comprises a first microlens structure and a second microlens structure. The plurality of light-emitting sub-pixels comprise a first light-emitting sub-pixel corresponding to the first microlens structure and a second light-emitting sub-pixel corresponding to the second microlens structure. The center point of the first microlens structure and the center point of the first light-emitting sub-pixel have a first interval in a first direction, the center point of the second microlens structure and the center point of the second light-emitting sub-pixel have a second interval in a second direction, and the first direction is different from the second direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the display field, and particularly relates to a display panel and a display device. BACKGROUND

[0002] OLED (Organic Light-Emitting Diode) display devices have been regarded as the next generation of new display technology due to their advantages of light weight, wide viewing angle, fast response time, low temperature resistance, high luminous efficiency and the like.

[0003] In order to reduce the power consumption of the OLED display panel, the researchers in the field have proposed a technical solution of setting an MLP (Micro Lens Pattern) in the OLED screen body according to the principle of geometric optics, so as to converge the relatively divergent light emitted by the OLED screen body to the upper side of the screen body, thereby improving the OLED screen body efficiency and reducing the power consumption of the OLED panel. However, the technical solution needs to correspond the MLP structure with the pixels one by one, and the existence of the position deviation causes the problem of poor viewing angle symmetry of the OLED display panel. SUMMARY

[0004] The present application provides a display panel and a display device to improve the viewing angle symmetry of the existing OLED display panel.

[0005] To solve the above problems, the technical solution provided by the present application is as follows:

[0006] The present application provides a display panel, which comprises:

[0007] a substrate;

[0008] a light-emitting layer arranged on one side of the substrate, the light-emitting layer comprising a plurality of light-emitting sub-pixels;

[0009] an optical functional layer arranged on the side of the light-emitting layer away from the substrate, the optical functional layer comprising a plurality of micro-lens structures arranged one by one corresponding to the light-emitting sub-pixels;

[0010] wherein the plurality of micro-lens structures comprise a plurality of periodically arranged repeating units, and the repeating units comprise a first micro-lens structure and a second micro-lens structure; and the plurality of light-emitting sub-pixels comprise a first light-emitting sub-pixel corresponding to the first micro-lens structure and a second light-emitting sub-pixel corresponding to the second micro-lens structure.

[0011] A center point of the first microlens structure and a center point of the first light-emitting sub-pixel have a first interval in a first direction, a center point of the second microlens structure and a center point of the second light-emitting sub-pixel have a second interval in a second direction, and the first direction is different from the second direction.

[0012] Optionally, in some embodiments of the present application, the first direction is opposite to the second direction.

[0013] The first interval and the second interval are the same.

[0014] Optionally, in some embodiments of the present application, the repeating unit further comprises a third microlens structure, and the plurality of light-emitting sub-pixels further comprises a third light-emitting sub-pixel corresponding to the third microlens structure.

[0015] A center point of the third microlens structure and a center point of the third light-emitting sub-pixel have a third interval in a third direction, and the first direction, the second direction, and the third direction are all different.

[0016] Optionally, in some embodiments of the present application, the first direction, the second direction, and the third direction are sequentially arranged at intervals of 120 degrees.

[0017] The first interval, the second interval, and the third interval are the same.

[0018] Optionally, in some embodiments of the present application, the repeating unit further comprises a fourth microlens structure, and the plurality of light-emitting sub-pixels further comprises a fourth light-emitting sub-pixel corresponding to the fourth microlens structure.

[0019] A center point of the fourth microlens structure and a center point of the fourth light-emitting sub-pixel have a fourth interval in a fourth direction, and the first direction, the second direction, the third direction, and the fourth direction are all different.

[0020] Optionally, in some embodiments of the present application, the first direction, the second direction, the third direction, and the fourth direction are sequentially arranged at intervals of 90 degrees.

[0021] The first interval, the second interval, the third interval, and the fourth interval are the same.

[0022] Optionally, in some embodiments of the present application, the shape of the microlens structure is the same as the shape of the corresponding light-emitting sub-pixel, and the size of the microlens structure is the same as the size of the corresponding light-emitting sub-pixel.

[0023] Optionally, in some embodiments of the present application, the first interval and the second interval are less than or equal to 5 microns.

[0024] Optionally, in some embodiments of the present application, the plurality of light emitting sub-pixels comprises a plurality of red light emitting sub-pixels, a plurality of green light emitting sub-pixels and a plurality of blue light emitting sub-pixels; the first interval corresponding to the red light emitting sub-pixel, the first interval corresponding to the green light emitting sub-pixel and the first interval corresponding to the blue light emitting sub-pixel are all equal.

[0025] Optionally, in some embodiments of the present application, the plurality of light emitting sub-pixels comprises a red light emitting sub-pixel, a green light emitting sub-pixel and a blue light emitting sub-pixel; the first interval corresponding to the red light emitting sub-pixel is smaller than the first interval corresponding to the green light emitting sub-pixel and larger than the first interval corresponding to the blue light emitting sub-pixel.

[0026] Optionally, in some embodiments of the present application, the first interval corresponding to the red light emitting sub-pixel is greater than 1 micrometer and less than or equal to 3 micrometers, the first interval corresponding to the blue light emitting sub-pixel is greater than 0 micrometer and less than or equal to 2 micrometers, and the first interval corresponding to the green light emitting sub-pixel is greater than 2 micrometers and less than or equal to 5 micrometers.

[0027] Optionally, in some embodiments of the present application, the shape of the microlens structure is the same as the shape of the corresponding light emitting sub-pixel, and the size of the microlens structure is greater than the size of the corresponding light emitting sub-pixel.

[0028] Optionally, in some embodiments of the present application, the display panel further comprises:

[0029] a pixel definition layer disposed between the substrate and the light emitting layer, the pixel definition layer comprising a plurality of first openings corresponding to the light emitting sub-pixels;

[0030] the optical functional layer comprises a first refractive index layer disposed on the side of the light emitting layer away from the substrate, and a second refractive index layer disposed on the side of the first refractive index layer away from the substrate, the first refractive index layer comprising a plurality of second openings corresponding to the microlens structures, and the refractive index of the first refractive index layer being smaller than the refractive index of the second refractive index layer.

[0031] Meanwhile, the present application also provides a display device comprising the display panel according to any one of the embodiments of the present application.

[0032] The application provides a display panel and a display device, the first microlens structure in the display panel is arranged to be offset relative to the corresponding first light-emitting sub-pixel center, the second microlens structure is arranged to be offset relative to the corresponding second light-emitting sub-pixel center, and the two offset directions are different, thereby solving the problem that all microlens structures in the prior art display panel are offset relative to the corresponding light-emitting sub-pixel in one direction, and further solving the problem of the viewing angle symmetry of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0033] The technical scheme of the application and other beneficial effects will be apparent from the following detailed description of the specific embodiments of the application in conjunction with the accompanying drawings.

[0034] Figure 1 A planar structure schematic view of the same color light-emitting sub-pixel and the corresponding microlens structure of the display panel in an ideal state;

[0035] Figure 2 A planar structure schematic view of the same color light-emitting sub-pixel and the corresponding microlens structure of the display panel in an ideal state; Figure 1 A cross-sectional structure schematic view in AA' direction;

[0036] Figure 3 A planar structure schematic view of the same color light-emitting sub-pixel and the corresponding microlens structure of the display panel in an ideal state;

[0037] Figure 4 A planar structure schematic view of the same color light-emitting sub-pixel and the corresponding microlens structure of the display panel in an ideal state; Figure 3 A cross-sectional structure schematic view in BB' direction;

[0038] Figure 5 A viewing angle symmetry result view of the display panel provided by the prior art;

[0039] Figure 6 A first planar superimposition schematic view of the same color light-emitting sub-pixel and the corresponding microlens structure of the display panel provided by the embodiment of the application;

[0040] Figure 7 A planar superimposition schematic view when the microlens structure is offset in position; Figure 6

[0041] A second planar superimposition schematic view of the same color light-emitting sub-pixel and the corresponding microlens structure of the display panel provided by the embodiment of the application; Figure 8

[0042] A planar superimposition schematic view when the microlens structure is offset in position; Figure 9 Figure 8 A planar superimposition schematic view when the microlens structure is offset in position;

[0043] Figure 10 ​A third planar superimposition schematic view of the same color light-emitting sub-pixel and the corresponding microlens structure of the display panel provided by the embodiment of the present application;

[0044] Figure 11 For Figure 10 A planar superimposition schematic view when the microlens structure is misaligned;

[0045] Figure 12 A cross-sectional structure schematic view of the display panel provided by the embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments and / or examples of the present application will be described clearly and completely with reference to the specific implementation of the present application. Obviously, the following described embodiments and / or examples are only a part of the embodiments and / or examples of the present application, but not all the embodiments and / or examples. Based on the embodiments and / or examples in the present application, all the other embodiments and / or examples obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0047] The direction terms mentioned in the present application, such as [up], [down], [left], [right], [front], [back], [inward], [outward], [side] and the like, are only the directions of the attached drawings. Therefore, the direction terms used are used to illustrate and understand the present application, but not to limit the present application. The terms "first", "second" and the like are only used for description purpose, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features.

[0048] Please refer to Figure 1 , Figure 1 A planar structure schematic view of the same color light-emitting sub-pixel and the corresponding microlens structure of the display panel in an ideal state, specifically, a planar structure schematic view of the same color sub-pixel and the corresponding microlens structure in a pixel diamond arrangement mode; Figure 2 For Figure 1A cross-sectional view of the structure along the AA' direction. Ideally, the display panel mainly includes a substrate 1, a light-emitting layer 2, a pixel definition layer 3, an encapsulation layer 4, an optical functional layer 5, and a cover plate 6, which are stacked sequentially. The substrate 1 includes a thin-film transistor circuit, the light-emitting layer 2 includes a plurality of light-emitting sub-pixels 11, and the pixel definition layer 3 is disposed between the substrate 1 and the light-emitting layer 2. The pixel definition layer 3 includes a plurality of first openings 31 corresponding to the light-emitting sub-pixels 11. The optical functional layer 5 includes a touch layer 51, a first refractive index layer 52, a second refractive index layer 53 and a polarizer 54 stacked sequentially from bottom to top. The refractive index of the first refractive index layer 52 is less than the refractive index of the second refractive index layer 53. The first refractive index layer 52 is provided with a second opening 55, which corresponds one-to-one with the light-emitting sub-pixels 11. The orthographic projection of the second opening 55 on the substrate 1 coincides with the projection of the light-emitting sub-pixels 11 on the substrate 1. The first refractive index layer 52 and the second refractive index layer 53 at the position of the second opening 55 form a microlens structure 12. The light emitted from the light-emitting sub-pixels 11 converges at the microlens structure 12, thereby increasing the amount of light emitted from the display panel at the forward viewing angle and improving the light emission efficiency of the display panel.

[0049] However, due to unavoidable alignment deviations during the fabrication of the first refractive index layer 52, a misalignment occurs between the microlens structure 12 and the light-emitting sub-pixel. Please refer to... Figure 3 and Figure 4 , Figure 3 A schematic diagram of a planar structure of light-emitting sub-pixels of the same color and corresponding microlens structures in a display panel provided for existing technology, specifically... Figure 3 (a) is a schematic diagram of a planar structure exhibiting upward alignment deviation during the fabrication of the microlens structure. Figure 3 (b) is a schematic diagram of a planar structure exhibiting downward alignment deviation during the fabrication of the microlens structure. Figure 3 (c) is a schematic diagram of the planar structure exhibiting leftward alignment deviation during the fabrication of the microlens structure. Figure 3 (d) is a schematic diagram of the planar structure with rightward alignment deviation during the fabrication of the microlens structure; Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure along the BB' direction. Figure 3 It can be seen that, regardless of the direction, if an alignment deviation occurs during the fabrication of the first refractive index layer 52, all microlens structures 12 will deviate in the same direction relative to the light-emitting sub-pixels 11. This situation will worsen the viewing angle symmetry of the display panel. Please refer to... Figure 5 , Figure 5 A diagram showing the viewing angle symmetry of a display panel provided for existing technology. Figure 5It can be seen that the existing display panel has a viewing angle symmetry problem in that the brightness of the display panel observed at symmetric visual angles is different.

[0050] In view of the above problems existing in the prior art, the present application provides a display panel which can solve or alleviate the problems.

[0051] The present application provides a display panel, which comprises:

[0052] a substrate;

[0053] a light-emitting layer disposed on one side of the substrate, the light-emitting layer comprising a plurality of light-emitting sub-pixels;

[0054] an optical functional layer disposed on the side of the light-emitting layer away from the substrate, the optical functional layer comprising a plurality of microlens structures arranged one-to-one with the light-emitting sub-pixels;

[0055] wherein the plurality of microlens structures comprises a plurality of periodically arranged repeating units, and the repeating unit comprises a first microlens structure and a second microlens structure; and the plurality of light-emitting sub-pixels comprises a first light-emitting sub-pixel corresponding to the first microlens structure and a second light-emitting sub-pixel corresponding to the second microlens structure.

[0056] The center point of the first microlens structure and the center point of the first light-emitting sub-pixel have a first interval in a first direction, and the center point of the second microlens structure and the center point of the second light-emitting sub-pixel have a second interval in a second direction, and the first direction is different from the second direction.

[0057] The present application provides a display panel, which comprises:

[0058] In the following, the display panel provided by the present application will be explained in detail with specific embodiments, specifically, the microlens structure of the display panel will be explained in detail. Since the light-emitting sub-pixels in the display panel usually include red light-emitting sub-pixels, green light-emitting sub-pixels and blue light-emitting sub-pixels, the arrangement of the microlens structure is the same for any color of light-emitting sub-pixel. In order to make the explanation clear, the same color of light-emitting sub-pixel (taking blue light-emitting sub-pixel as an example) will be taken as an example to explain the microlens structure.

[0059] Embodiment one

[0060] Please refer to Figure 6 , Figure 6 The first planar superimposed schematic diagram of the same color light-emitting sub-pixel and the corresponding microlens structure of the display panel provided by the embodiment of the present application. In the embodiment of the present application, the shape of the microlens structure 12 is the same as the shape of the corresponding light-emitting sub-pixel 11, and the size of the microlens structure 12 is the same as the size of the corresponding light-emitting sub-pixel 11.

[0061] One repeating unit 10 includes two microlens structures 12: a first microlens structure 121 and a second microlens structure 122. A plurality of light-emitting sub-pixels 11 includes a first light-emitting sub-pixel 111 corresponding to the first microlens structure 121 and a second light-emitting sub-pixel 112 corresponding to the second microlens structure 122.

[0062] The center point O 21 of the first microlens structure 121 11 is above the center point O 21 of the first light-emitting sub-pixel 111 11 with a first interval d1, and the center point O 22 of the second microlens structure 122 12 is below the center point O 22 of the second light-emitting sub-pixel 112 12 with a second interval d2, the first direction O 21 O 11 is opposite to the second direction O 22 O 12 , and the first interval d1 and the second interval d2 are equal.

[0063] Figure 6 The first direction O 21 O 11 is upward, and the second direction O 22 O 12 is downward. In other embodiments of the present application, the first direction can be downward and the second direction can be upward, and the like, without limitation.

[0064] Thus, the first microlens structure 121 is equivalent to being offset from the first light-emitting sub-pixel 111 in the first direction O 21 O 11 , the first interval d1; the light converging effect of the first microlens structure 121 on the first light-emitting sub-pixel 111 is enhanced in the first direction O 21 O 11 , and weakened in the second direction O 22 O12 The intensity is reduced. The second microlens structure 122 moves in the second direction O relative to the second light-emitting sub-pixel 112. 22 O 12 The offset of the second interval d2; the light-gathering effect of the second microlens structure 122 on the second light-emitting sub-pixel 112 in the second direction O. 22 O 12 Enhancement, in the first direction O 21 O 11 Weaken.

[0065] Since the first interval d1 and the second interval d2 are equal, the light-gathering effect of the first microlens structure 121 on the first light-emitting sub-pixel 111 is in the first direction O. 21 O 11 The enhancement effect, combined with the light-gathering effect of the second microlens structure 122 on the second light-emitting sub-pixel 112 in the second direction O 22 O 12 The enhancement effect is the same; the second microlens structure 122 focuses the light from the second light-emitting sub-pixel 112 in the first direction O. 21 O 11 The reduction effect, along with the light-gathering effect of the first microlens structure 121 on the first light-emitting sub-pixel 111 in the second direction O, 22 O 12 The reduction effect is the same; ultimately, the entire display panel is positioned in the first direction O. 21 O 11 and the second direction O 22 O 12 The visual effect is the same in all directions, i.e., visual symmetry. In other directions, the display panel is visually symmetrical because the first microlens structure 121 overlaps with the first light-emitting sub-pixel 111, and the second microlens structure 122 overlaps with the second light-emitting sub-pixel 112.

[0066] When alignment deviations occur during the fabrication of the first refractive index layer 52, please refer to... Figure 7 , Figure 7 for Figure 6 A planar superposition diagram illustrating the alignment misalignment of the microlens structure; specifically... Figure 7 (a) is a schematic diagram of planar superposition when the microlens structure exhibits upward alignment shift. Figure 7 (b) is a schematic diagram of planar superposition when the microlens structure exhibits downward alignment shift. Figure 7 Image (c) is a schematic diagram of planar superposition when the microlens structure exhibits a leftward alignment shift. Figure 7Fig. 4 is a schematic diagram of a planar superposition when a rightward alignment deviation occurs in the preparation of the first refractive index layer 52.

[0067] As shown in Fig. 2(a), when an upward alignment deviation occurs in the preparation of the first refractive index layer 52, one of the repeating units 10 has one of the microlens structures 12 whose center point is on the same horizontal line as the center point of the corresponding light-emitting sub-pixel 11, i.e., the light converging effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the up-down direction, thereby improving the viewing angle symmetry of the display panel in the up-down direction by 50%. Figure 7 As shown in Fig. 2(b), when a downward alignment deviation occurs in the preparation of the first refractive index layer 52, one of the repeating units 10 has one of the microlens structures 12 whose center point is on the same horizontal line as the center point of the corresponding light-emitting sub-pixel 11, i.e., the light converging effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the up-down direction, thereby improving the viewing angle symmetry of the display panel in the up-down direction by 50%.

[0068] Figure 7 As shown in Fig. 2(c), when a leftward alignment deviation occurs in the preparation of the first refractive index layer 52, one of the repeating units 10 has one of the microlens structures 12 whose center point is on the same vertical line as the center point of the corresponding light-emitting sub-pixel 11, i.e., the light converging effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the left-right direction, thereby improving the viewing angle symmetry of the display panel in the left-right direction by 50%.

[0069] As shown in Fig. 2(d), when a rightward alignment deviation occurs in the preparation of the first refractive index layer 52, one of the repeating units 10 has one of the microlens structures 12 whose center point is on the same vertical line as the center point of the corresponding light-emitting sub-pixel 11, i.e., the light converging effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the left-right direction, thereby improving the viewing angle symmetry of the display panel in the left-right direction by 50%. Figure 7 The light-emitting sub-pixels of the display panel include red light-emitting sub-pixels, green light-emitting sub-pixels, and blue light-emitting sub-pixels, and further, the light-emitting sub-pixels can also include white light-emitting sub-pixels. The arrangement of the microlens structures corresponding to the red light-emitting sub-pixels, the green light-emitting sub-pixels, and the blue light-emitting sub-pixels is the same as the arrangement of the microlens structure 12 described above.

[0070] Figure 8 The light-emitting sub-pixels of the display panel include red light-emitting sub-pixels, green light-emitting sub-pixels, and blue light-emitting sub-pixels, and further, the light-emitting sub-pixels can also include white light-emitting sub-pixels. The arrangement of the microlens structures corresponding to the red light-emitting sub-pixels, the green light-emitting sub-pixels, and the blue light-emitting sub-pixels is the same as the arrangement of the microlens structure 12 described above.

[0071] The light-emitting sub-pixels of the display panel include red light-emitting sub-pixels, green light-emitting sub-pixels, and blue light-emitting sub-pixels, and further, the light-emitting sub-pixels can also include white light-emitting sub-pixels. The arrangement of the microlens structures corresponding to the red light-emitting sub-pixels, the green light-emitting sub-pixels, and the blue light-emitting sub-pixels is the same as the arrangement of the microlens structure 12 described above.

[0072] ​​In an embodiment, the first interval between the red light-emitting sub-pixel and the corresponding micro-lens structure, the first interval between the green light-emitting sub-pixel and the corresponding micro-lens structure, and the first interval between the blue light-emitting sub-pixel and the corresponding micro-lens structure are all equal, and the first interval is less than or equal to 4 microns. When misalignment occurs, the first interval after the shift, the second interval is less than or equal to 5 microns.

[0073] In another embodiment, the first interval between the red light-emitting sub-pixel and the corresponding micro-lens structure is greater than the first interval between the green light-emitting sub-pixel and the corresponding micro-lens structure, and is less than the first interval between the blue light-emitting sub-pixel and the corresponding micro-lens structure. Specifically, the first interval between the red light-emitting sub-pixel and the corresponding micro-lens structure is greater than 1 micron and less than or equal to 2 microns, the first interval between the green light-emitting sub-pixel and the corresponding micro-lens structure is less than or equal to 1 micron, and the first interval between the blue light-emitting sub-pixel and the corresponding micro-lens structure is greater than 2 microns and less than or equal to 4 microns. When misalignment occurs, the first interval between the red light-emitting sub-pixel and the corresponding micro-lens structure after the shift is greater than 0 and less than or equal to 3 microns, the first interval between the green light-emitting sub-pixel and the corresponding micro-lens structure is less than or equal to 2 microns, and the first interval between the blue light-emitting sub-pixel and the corresponding micro-lens structure is greater than 1 micron and less than or equal to 5 microns.

[0074] On the basis of the present embodiment, the repeating unit can further include one or more third micro-lens structures, the light-emitting sub-pixel includes a third light-emitting sub-pixel corresponding to the third micro-lens structure, and the center point of the third micro-lens structure coincides with the center point of the third light-emitting sub-pixel.

[0075] Embodiment Two

[0076] Please refer to Figure 8 , Figure 8 A second planar superimposition schematic diagram of the same color light-emitting sub-pixel and the corresponding micro-lens structure of the display panel according to the present embodiment is provided. The similar parts of the present embodiment to Embodiment One will not be described again, and please refer to Embodiment One for details. The difference between the present embodiment and Embodiment One is that one repeating unit 10 includes three micro-lens structures 12, i.e., a first micro-lens structure 121, a second micro-lens structure 122, and a third micro-lens structure 123. A plurality of light-emitting sub-pixels 11 include a first light-emitting sub-pixel 111 corresponding to the first micro-lens structure 121, a second light-emitting sub-pixel 112 corresponding to the second micro-lens structure 122, and a third light-emitting sub-pixel 113 corresponding to the third micro-lens structure 123.

[0077] the center point O of the first microlens structure 121 21 with the center point O of the first light-emitting sub-pixel 111 11 in the first direction O 21 O 11 with the first interval d1, the center point O of the second microlens structure 122 22 with the center point O of the second light-emitting sub-pixel 112 12 in the second direction O 22 O 12 with the second interval d2, the center point O of the third microlens structure 123 23 with the center point O of the third light-emitting sub-pixel 113 13 in the third direction O 23 O 13 with the third interval d3; the first direction O 21 O 11 , the second direction O 22 O 12 , the third direction O 23 O 13 are sequentially spaced 120 degrees apart; the first interval d1, the second interval d2, and the third interval d3 are all equal.

[0078] Figure 9 the first direction O 21 O 11 is directly above, the second direction O 22 O 12 is to the lower right, and the third direction O 23 O 13 is to the lower left. In other embodiments of the present application, other directional settings are also possible, which are not limited herein.

[0079] Similarly, since the first direction O 21 O 11 , the second direction O 22 O 12 , and the third direction O 23 O 13 are sequentially spaced 120 degrees apart, and the first interval d1, the second interval d2, and the third interval d3 are all equal, the comprehensive effect of the three microlens structures 12 in one repeating unit 10 on the corresponding three light-emitting sub-pixels 11 makes the visual effect of the display panel relatively symmetrical in any two opposite directions, the specific principle of which is described in Embodiment One.

[0080] When alignment deviation occurs during the preparation of the first refractive index layer 52, please refer to Figure 9 ,Figure 8 for Figure 9 A schematic diagram of planar superposition when the microlens structure undergoes alignment misalignment.

[0081] like Figure 9 As shown in (a), Figure 9 (a) is a schematic diagram of planar superposition when the microlens structure exhibits upward alignment deviation. When an upward alignment deviation occurs during the fabrication of the first refractive index layer 52, within one repeating unit 10, there are two microlens structures 12, the center point of which is on the same horizontal line as the center point of the corresponding light-emitting sub-pixel 11. That is, the light-gathering effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the vertical direction, thereby improving the viewing angle symmetry of the display panel in the vertical direction by 67%.

[0082] like Figure 9 As shown in (b), Figure 9 (b) is a schematic diagram of planar superposition when the microlens structure exhibits downward alignment deviation. When downward alignment deviation occurs during the fabrication of the first refractive index layer 52, within one repeating unit 10, there exists one microlens structure 12, the center point of which coincides with the center point of the corresponding light-emitting sub-pixel 11. That is, the light-gathering effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the vertical direction, thereby improving the viewing angle symmetry of the display panel in the vertical direction by 33%.

[0083] like Figure 9 As shown in (c), Figure 9 (c) is a schematic diagram of planar superposition when the microlens structure exhibits a leftward alignment shift. When a leftward alignment shift occurs during the fabrication of the first refractive index layer 52, within one repeating unit 10, there exists one microlens structure 12, the center point of which is on the same vertical line as the center point of the corresponding light-emitting sub-pixel 11. That is, the light-gathering effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the left-right direction, thereby improving the viewing angle symmetry of the display panel in the left-right direction by 33%.

[0084] like Figure 10 As shown in (d), Figure 10 Image (d) is a schematic diagram of planar superposition when the microlens structure exhibits a rightward alignment shift. When a rightward alignment shift occurs during the fabrication of the first refractive index layer 52, within one repeating unit 10, there exists one microlens structure 12, the center point of which is on the same vertical line as the center point of the corresponding light-emitting sub-pixel 11. That is, the light-gathering effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the left-right direction, thereby improving the viewing angle symmetry of the display panel in the left-right direction by 33%.

[0085] Embodiment three

[0086] Please refer to Figure 10 , Figure 11 The third planar superimposed schematic view of the same color light emitting sub-pixel and the corresponding microlens structure of the display panel provided in the embodiment of the present application. The similar parts of the present embodiment to embodiment one will not be repeated here, please refer to embodiment one. The difference between the present embodiment and embodiment one is that: one repeating unit 10 includes four microlens structures 12: the first microlens structure 121, the second microlens structure 122, the third microlens structure 123 and the fourth microlens structure. A plurality of light emitting sub-pixels 11 include: the first light emitting sub-pixel 111 corresponding to the first microlens structure 121, the second light emitting sub-pixel 112 corresponding to the second microlens structure 122, the third light emitting sub-pixel 113 corresponding to the third microlens structure 123, and the fourth light emitting sub-pixel 114 corresponding to the fourth microlens structure 124.

[0087] The center point O 21 of the first microlens structure 121 11 is on the first direction O 21 O 11 with a first interval d1, the center point O 22 of the second microlens structure 122 12 is on the second direction O 22 O 12 with a second interval d2, the center point O 23 of the third microlens structure 123 13 is on the third direction O 23 O 13 with a third interval d3, the center point O 24 of the fourth microlens structure 124 14 is on the fourth direction O 24 O 14 with a fourth interval d4. The first direction O 21 O 11 , the second direction O 22 O 12 , the third direction O 23 O 13 , the fourth direction O 24 O 14 are sequentially spaced 90 degrees; the first interval d1, the second interval d2, the third interval d3, the fourth interval d4 are all equal.

[0088] Figure 11 the first direction O 21 O 11 is left-up, the second direction O 22 O 12 is right-up, the third direction O 23 O 13 is right-down, the fourth direction O 24 O 14 is left-down. In other embodiments of the present application, other direction settings can also be used, which are not limited herein.

[0089] Similarly, since the first direction O 21 O 11 , the second direction O 22 O 12 , the third direction O 23 O 13 , the fourth direction O 24 O 14 are sequentially spaced by 90 degrees, the first interval d1, the second interval d2, and the fourth interval d4 are all equal, and the four microlens structures 12 in one repeating unit 10 have a comprehensive effect on the corresponding four light-emitting sub-pixels 11, so that the visual effect of the display panel is relatively symmetrical in any two opposite directions. For specific principles, please refer to Embodiment One.

[0090] When alignment deviation occurs during preparation of the first refractive index layer 52, please refer to Figure 10 , Figure 11 is Figure 11 a planar superposition diagram when the microlens structure in (a) of

[0091] As shown in (a) of Figure 11 , (a) of Figure 11 is a planar superposition diagram when the microlens structure appears upward alignment offset. When upward alignment deviation occurs during preparation of the first refractive index layer 52, there are two microlens structures 12 in one repeating unit 10, the center points of which are on the same horizontal line as the center points of the corresponding light-emitting sub-pixels 11, that is, the light converging effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the up-down direction, thereby improving the viewing angle symmetry of the display panel in the up-down direction, and the improvement degree is 50%.

[0092] As shown in (b) of Figure 11 , (b) of Figure 11(b) is a schematic diagram of planar superposition when the microlens structure exhibits downward alignment deviation. When downward alignment deviation occurs during the fabrication of the first refractive index layer 52, within one repeating unit 10, there are two microlens structures 12, the center point of which is on the same horizontal line as the center point of the corresponding light-emitting sub-pixel 11. That is, the light-gathering effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the vertical direction, thereby improving the viewing angle symmetry of the display panel in the vertical direction by 50%.

[0093] like Figure 11 As shown in (c), Figure 12 (c) is a schematic diagram of planar superposition when the microlens structure exhibits a leftward alignment shift. When a leftward alignment shift occurs during the fabrication of the first refractive index layer 52, within one repeating unit 10, there are two microlens structures 12, the center point of which is on the same vertical line as the center point of the corresponding light-emitting sub-pixel 11. That is, the light-gathering effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the left-right direction, thereby improving the viewing angle symmetry of the display panel in the left-right direction by 50%.

[0094] like Figure 12 As shown in (d), Figure 12 (d) is a schematic diagram of planar superposition when the microlens structure exhibits a rightward alignment shift. When a rightward alignment shift occurs during the fabrication of the first refractive index layer 52, within one repeating unit 10, there are two microlens structures 12, whose center points are on the same vertical line as the center point of the corresponding light-emitting sub-pixel 11. That is, the light-gathering effect of the microlens structure 12 on the light-emitting sub-pixel 11 is symmetrical in the left-right direction, thereby improving the viewing angle symmetry of the display panel in the left-right direction by 50%.

[0095] Based on Embodiments 1 to 3, and extending to other embodiments, the repeating unit 10 may further include five or more microlens structures 12, and the distance between the offset directions of the center points of any two adjacent microlens structures 12 relative to the center point of the corresponding light-emitting sub-pixel 11 is equal, and the distance between the center points is equal.

[0096] Example 4

[0097] Please refer to Figure 12 , Figure 11A fourth planar superimposition schematic view of the same color light emitting sub-pixels and corresponding microlens structures of the display panel is provided in the embodiments of the present application. In the embodiments of the present application, the shape of the microlens structure 12 is the same as that of the corresponding light emitting sub-pixel 11, the size of the microlens structure 12 is larger than that of the corresponding light emitting sub-pixel 11, and the orthographic projection of the microlens structure 12 on the substrate 1 covers the orthographic projection of the corresponding light emitting sub-pixel 11 on the substrate 1.

[0098] One repeating unit 10 includes two microlens structures 12, i.e., a first microlens structure 121 and a second microlens structure 122. A plurality of light emitting sub-pixels 11 includes a first light emitting sub-pixel 111 corresponding to the first microlens structure 121 and a second light emitting sub-pixel 112 corresponding to the second microlens structure 122.

[0099] The center point O 21 of the first microlens structure 121 is located on the first light emitting sub-pixel 111. 11 In the first direction O 21 O 11 , the first microlens structure 121 has a first interval d1 in the direction O 21 O 11 , and the size of the first microlens structure 121 is single-side extended in the direction O 22 The center point O 12 of the second microlens structure 122 is located on the second light emitting sub-pixel 112. 22 In the second direction O 12 , the second microlens structure 122 has a second interval d2 in the direction O 22 O 12 , and the size of the second microlens structure 122 is single-side extended in the direction O 21 O 11 The first direction O 22 O 12 is opposite to the second direction O 21 O 11 , and the first interval d1 and the second interval d2 are equal.

[0100] Similarly, since the first direction O 22 O 12In the opposite direction, the first interval d1, the second interval d2 are equal, the two microlens structures 12 in one of the repeating units 10, the comprehensive effect of the corresponding two light emitting sub-pixels 11, so that the visual effect of the display panel is relatively symmetrical in any two opposite directions, please refer to embodiment one for specific principle.

[0101] In one embodiment, the first interval between the red light emitting sub-pixel and the corresponding microlens structure, the first interval between the green light emitting sub-pixel and the corresponding microlens structure, and the first interval between the blue light emitting sub-pixel and the corresponding microlens structure are all equal, and the first interval is less than or equal to 4 microns.

[0102] In another embodiment, the first interval between the red light emitting sub-pixel and the corresponding microlens structure is greater than the first interval between the green light emitting sub-pixel and the corresponding microlens structure, and is less than the first interval between the blue light emitting sub-pixel and the corresponding microlens structure. Specifically, the first interval between the red light emitting sub-pixel and the corresponding microlens structure is greater than 1 micron and less than or equal to 2 microns, the first interval between the green light emitting sub-pixel and the corresponding microlens structure is less than or equal to 1 micron, and the first interval between the blue light emitting sub-pixel and the corresponding microlens structure is greater than 2 microns and less than or equal to 4 microns.

[0103] In other embodiments, the repeating unit 10 can also include three, four, five, or even more microlens structures 12, and the interval between the offset directions of the center points of any two adjacent microlens structures 12 relative to the center point of the corresponding light emitting sub-pixel 11 is equal, and the interval distance between the center points is equal. In other embodiments, the microlens structure 12 can be single-sidedly elongated relative to the corresponding light emitting sub-pixel 11, or can be double-sidedly or even multi-variantly elongated.

[0104] Accordingly, the embodiment of the present application provides a display panel, please refer to ​ , ​ A cross-sectional structure diagram of the display panel provided by the present application, specifically ​A schematic view of a cross-sectional structure in a direction of CC'. The display panel comprises a substrate 1, a light-emitting layer 2, a pixel definition layer 3, an encapsulation layer 4, an optical functional layer 5, and a cover plate 6 which are sequentially stacked. The light-emitting layer 2 comprises a plurality of light-emitting sub-pixels 11. The pixel definition layer 3 is disposed between the substrate 1 and the light-emitting layer 2, and comprises a plurality of first openings 31 corresponding to the light-emitting sub-pixels. The optical functional layer 5 comprises a touch layer 51, a first refractive index layer 52, a second refractive index layer 53, and a polarizer 54 which are sequentially stacked from bottom to top. The first refractive index layer 52 has a refractive index smaller than that of the second refractive index layer 53. The first refractive index layer 52 is provided with a second opening 55 corresponding to each light-emitting sub-pixel 11. The second opening 55 has a projection on the substrate 1 which partially overlaps with the projection of the first opening 31 on the substrate 1. The first refractive index layer 52 and the second refractive index layer 53 at the position of the second opening 55 form a microlens structure 12.

[0105] The display device comprises the display panel according to any one of the embodiments of the display device.

[0106] In summary, the display panel and the display device provided by the embodiments of the present application can solve the problem that all the microlens structures in the prior display panel are offset in one direction relative to the corresponding light-emitting sub-pixel, and further solve the problem of the viewing angle symmetry of the display panel.

[0107] The display panel and the display device provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application. In summary, the content of the present description should not be understood as a limitation of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a light-emitting layer arranged on one side of the substrate, the light-emitting layer comprising a plurality of light-emitting sub-pixels; an optical functional layer arranged on the side of the light-emitting layer away from the substrate, the optical functional layer comprising a plurality of microlens structures arranged one-to-one with the light-emitting sub-pixels; wherein the plurality of microlens structures comprise a plurality of periodically arranged repeating units, the repeating unit comprising a first microlens structure, a second microlens structure, and a third microlens structure, and the plurality of light-emitting sub-pixels comprise a first light-emitting sub-pixel corresponding to the first microlens structure, a second light-emitting sub-pixel corresponding to the second microlens structure, and a third light-emitting sub-pixel corresponding to the third microlens structure; the center point of the first microlens structure and the center point of the first light-emitting sub-pixel have a first interval in a first direction, the center point of the second microlens structure and the center point of the second light-emitting sub-pixel have a second interval in a second direction, and the center point of the third microlens structure and the center point of the third light-emitting sub-pixel have a third interval in a third direction, the first direction, the second direction, and the third direction being different; the first direction, the second direction, and the third direction are arranged in sequence with an interval of 120 degrees; the first interval, the second interval, and the third interval are the same.

2. The display panel of claim 1, wherein, The shape of the microlens structure is the same as that of the corresponding light-emitting sub-pixel, and the size of the microlens structure is the same as that of the corresponding light-emitting sub-pixel.

3. The display panel of claim 2, wherein, The first interval and the second interval are less than or equal to 5 microns.

4. The display panel of claim 3, wherein, The plurality of light-emitting sub-pixels comprise a plurality of red light-emitting sub-pixels, a plurality of green light-emitting sub-pixels, and a plurality of blue light-emitting sub-pixels; the first interval corresponding to the red light-emitting sub-pixel, the first interval corresponding to the green light-emitting sub-pixel, and the first interval corresponding to the blue light-emitting sub-pixel are equal.

5. The display panel of claim 3, wherein, The plurality of light-emitting sub-pixels comprise red light-emitting sub-pixels, green light-emitting sub-pixels, and blue light-emitting sub-pixels; the first interval corresponding to the red light-emitting sub-pixel is less than the first interval corresponding to the green light-emitting sub-pixel and greater than the first interval corresponding to the blue light-emitting sub-pixel.

6. The display panel of claim 5, wherein, The first interval corresponding to the red light-emitting sub-pixel is greater than 1 micron and less than or equal to 3 microns, the first interval corresponding to the blue light-emitting sub-pixel is greater than 0 micron and less than or equal to 2 microns, and the first interval corresponding to the green light-emitting sub-pixel is greater than 2 microns and less than or equal to 5 microns.

7. The display panel of claim 1, wherein, The shape of the microlens structure is the same as that of the corresponding light-emitting sub-pixel, and the size of the microlens structure is greater than that of the corresponding light-emitting sub-pixel.

8. The display panel of claim 1, wherein, The display panel further comprises: a pixel definition layer arranged between the substrate and the light-emitting layer, the pixel definition layer comprising a plurality of first openings corresponding to the light-emitting sub-pixels; The optical function layer comprises: a first refractive index layer arranged on the side of the light-emitting layer away from the substrate, and a second refractive index layer arranged on the side of the first refractive index layer away from the substrate, the first refractive index layer comprises a plurality of second openings corresponding to the microlens structure, and the refractive index of the first refractive index layer is less than the refractive index of the second refractive index layer.

9. A display device comprising: The display panel comprises the display panel as claimed in any one of claims 1 to 8.

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