Display panel and display device

Abstract

The present application provides a display panel and a display device, which relate to the field of display technologies and are used to solve the problem of color shift of an OLED display panel at large viewing angles. In this display panel, the outward expansion distance L' of at least one pixel unit in the planar display area is greater than the outward expansion distance L of this pixel unit in the arc-shaped display area. Since the attenuation amplitude of the light emitted by the pixel unit becomes smaller as the outward expansion distance of the pixel unit increases, the proportion of this color light in white light is increased. Therefore, by adjusting the outward expansion distance of the pixel unit in the arc-shaped display area, the attenuation degree of the light emitted by the pixel unit located in the arc-shaped display area is increased, so that the proportion of the light emitted by the pixel unit in the planar display area and the arc-shaped display area in white light is the same, thereby improving the color shift problem of the display panel at large viewing angles.

Description

Technical Field

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

[0002] An organic light-emitting diode (OLED) display panel has characteristics such as self-luminescence, fast response, wide viewing angle, and can be fabricated on a flexible substrate, and is increasingly applied to high-performance display fields such as flexible display devices.

[0003] In order to enhance the light extraction efficiency and display effect of an OLED display panel, a microlens array is usually provided in the OLED display panel. The microlens array can play a role in concentrating light, and can concentrate large-angle light into small-angle light, thereby improving the front light extraction efficiency of the OLED display panel. However, when the above microlens array is applied to an OLED display panel with a curved surface, the OLED display panel has a large viewing angle color shift problem. Summary of the Invention

[0004] In view of the above problems, embodiments of the present application provide a display panel and a display device, which can improve the problem of large viewing angle color shift existing in the OLED display panel.

[0005] To achieve the above object, embodiments of the present application provide the following technical solutions:

[0006] A first aspect of embodiments of the present application provides a display panel. The display panel has a flat display area and a curved display area connected to the flat display area. The display panel includes an array substrate, a light-emitting layer, a packaging layer, and an optical adhesive layer that are sequentially stacked; the light-emitting layer includes a pixel definition layer disposed between the packaging layer and the array substrate. The pixel definition layer has a plurality of pixel openings, and a pixel unit is disposed in each pixel opening;

[0007] The optical adhesive layer has a plurality of microlens openings, and a microlens structure is disposed in each microlens opening, and each pixel opening corresponds to each microlens opening one by one; along a direction perpendicular to the array substrate, a projection of a small-diameter end of the microlens opening on the packaging layer forms a first contour, and a projection of a small-diameter end of the pixel opening on the array substrate forms a second contour, and the first contour surrounds the second contour and forms a centrosymmetric structure. A distance between the first contour and the second contour is an outward expansion distance of the pixel unit; among a plurality of pixel units of the display panel, an outward expansion distance L' of at least one pixel unit in the flat display area is greater than an outward expansion distance L of the pixel unit in the curved display area.

[0008] In a possible implementation, the light-emitting layer includes a first pixel unit, a second pixel unit, and a third pixel unit; for at least one of the first pixel unit, the second pixel unit, and the third pixel unit, an outward expansion distance L' in the flat display area is greater than an outward expansion distance L in the arc-shaped display area.

[0009] In a possible implementation, the first pixel unit is a blue pixel unit, and an outward expansion distance L' in the flat display area is greater than an outward expansion distance L in the arc-shaped display area.

[0010] In a possible implementation, the second pixel unit is a green pixel unit, and an outward expansion distance L' in the flat display area is greater than an outward expansion distance L in the arc-shaped display area.

[0011] In a possible implementation, the first pixel unit is a blue pixel unit, and the second pixel unit is a green pixel unit; an outward expansion distance L' of the first pixel unit in the flat display area is greater than an outward expansion distance L in the arc-shaped display area; and an outward expansion distance L' of the second pixel unit in the flat display area is greater than an outward expansion distance L in the arc-shaped display area.

[0012] In a possible implementation, the first contour and the second contour enclose a concentric square-within-a-square structure or a concentric annular structure; preferably, in a direction perpendicular to the array substrate, cross-sectional shapes of the pixel opening and the microlens opening are trapezoidal in an inverted shape.

[0013] In a possible implementation, a difference between the outward expansion distance L' and the outward expansion distance L is ≥ 0.5 μm.

[0014] In a possible implementation, in a direction from the flat display area to the arc-shaped display area, the outward expansion distance L of each pixel unit located in the arc-shaped display area gradually decreases.

[0015] In a possible implementation, the arc-shaped display area includes N equally spaced sub-regions, where N is a positive integer and N ≥ 2; a difference in the change of the outward expansion distance L of the pixel units in two adjacent sub-regions is (L' - L) / N.

[0016] A second aspect of the embodiments of the present application provides a display device, including the display panel described in the first aspect.

[0017] Compared with the related art, the display panel and the display device provided by the embodiments of the present application have the following advantages;

[0018] The display panel and the display device provided by the embodiments of the present application, wherein the display panel includes a flat display area and a curved display area connected thereto; the light-emitting layer of the display panel includes a plurality of pixel openings, and each pixel opening is provided with a pixel unit; an optical glue layer is disposed above the light-emitting layer, the optical glue layer has a plurality of microlens openings, each microlens opening corresponds to each pixel opening one by one, and a microlens structure is disposed in each microlens opening respectively.

[0019] Along the direction perpendicular to the array substrate, the minimum profile projection of the microlens opening on the array substrate surrounds the minimum profile projection of the pixel opening on the array substrate, and there is a gap between the two and an outward expansion distance of the pixel unit is formed. Since as the outward expansion distance of the pixel unit increases, the attenuation amplitude of the light emitted by the pixel unit becomes smaller, thereby increasing the proportion of this color light in white light. Therefore, by adjusting the outward expansion distance of the pixel unit in the curved display area to increase the attenuation degree of the light emitted by the pixel unit located in the curved display area, the proportion of the light emitted by the pixel unit in the flat display area and the curved display area in white light is made consistent, thereby improving the color shift problem of the display panel at a large viewing angle.

[0020] For example, when the large viewing angle of the display panel is bluish, the outward expansion distance of the blue pixel unit in the curved display area can be adjusted to be smaller than the outward expansion distance of the blue pixel unit in the flat display area, so that the proportion of blue light in the flat display area and the curved display area in white light is consistent, thereby improving the bluish problem of the display panel at a large viewing angle.

[0021] In addition to the technical problems solved by the embodiments of the present disclosure described above, the technical features constituting the technical solutions, and the beneficial effects brought by the technical features of these technical solutions, other technical problems that can be solved by the display panel and the display device provided by the embodiments of the present disclosure, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a top view of the display panel provided by the embodiments of the present application;

[0024] Figure 2 It is a layout diagram of the pixel opening and the microlens structure provided by the embodiments of the present application;

[0025] Figure 3 is Figure 2 the A-A cross-sectional view shown in;

[0026] Figure 4 a schematic diagram of the layout of the expansion distance L' of the pixel unit provided in the embodiment of the present application in the flat display area and its expansion distance L in the arc display area;

[0027] Figure 5 a schematic diagram of the layout of multiple sub-regions of the arc display area provided in the embodiment of the present application.

[0028] Explanation of reference numerals:

[0029] 10 - array substrate;

[0030] 20 - light-emitting layer;

[0031] 21 - pixel definition layer; 211 - pixel opening;

[0032] 22 - pixel unit; 221 - first pixel unit; 222 - second pixel unit; 223 - third pixel unit;

[0033] 40 - encapsulation layer;

[0034] 50 - optical adhesive layer;

[0035] 51 - microlens opening;

[0036] 60 - microlens structure;

[0037] 100 - display panel;

[0038] 101 - flat display area;

[0039] 102 - arc display area;

[0040] 1021 - sub-region. Detailed implementation manners

[0041] As described in the background art, when a microlens array is applied to an OLED display panel with a curved surface, there is a problem of large viewing angle color shift in the OLED display panel. After research by the applicant, it is found that the reason for this problem is that in the OLED display panel, white light is composed of red, green, and blue light. Therefore, when the brightness and hue attenuation speeds of the three colors of light are different, the synthesized white light will have a color shift. However, when a microlens array is applied to an OLED display panel with a curved surface, due to the different degrees of brightness aggregation of the microlens array for each pixel unit at a large viewing angle, the attenuation degrees of the light emitted by each pixel unit are different, so there is a color shift problem in the display panel at a large viewing angle.

[0042] In view of the above technical problems, embodiments of the present application provide a display panel and a display device. The display panel improves the color shift problem at a large viewing angle by making the outward expansion distance L' of at least one pixel unit in the planar display area greater than the outward expansion distance L of the pixel unit in the arc display area.

[0043] Specifically, as the outward expansion distance of the pixel unit increases, the attenuation amplitude of the light emitted by the pixel unit becomes smaller, thereby increasing the proportion of this color light in white light. Therefore, by adjusting the outward expansion distance of the pixel unit in the arc display area, the attenuation degree of the light emitted by the pixel unit located in the arc display area is increased, so that the proportion of the light emitted by the pixel unit in the planar display area and the arc display area in white light is the same, thereby improving the color shift problem of the display panel at a large viewing angle.

[0044] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0045] Embodiments of the present application provide a display device, which may include a display panel 100. The display device may be a mobile or fixed terminal with a display panel 100, such as an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a super personal computer, a navigator, etc.

[0046] As Figures 1 to 4 shown, the display panel 100 provided by the embodiments of the present application may be an OLED display panel. The display panel 100 includes an array substrate 10, a light-emitting layer 20, a packaging layer 40, and an optical adhesive layer 50 that are stacked in sequence. The array substrate 10 has a driving circuit to drive the pixel units 22 of the light-emitting layer 20 to emit light. The light-emitting layer 20 is disposed on the array substrate 10. The light-emitting layer 20 includes a pixel definition layer 21 and a plurality of pixel units 22. The pixel definition layer 21 is provided with a plurality of pixel openings 211, that is, a plurality of pixel units 22 are respectively disposed in the plurality of pixel openings 211, and one pixel unit 22 is arranged in each pixel opening 211. The light emitted by the pixel unit 22 can be emitted in a direction away from the array substrate 10 along the light-emitting layer 20.

[0047] For example, the pixel definition layer 21 may be a black light-shielding layer formed by depositing a black light-shielding material on the surface of the array substrate 10. A plurality of pixel openings 211 are provided at intervals in the pixel definition layer 21. Along the direction perpendicular to the array substrate 10, the shape of the pixel opening 211 may be an inverted trapezoid, that is, the pixel opening 211 includes a large-diameter end and a small-diameter end arranged opposite to each other, wherein the small-diameter end is close to the array substrate 10 and the large-diameter end is far from the array substrate 10. Such a setting can improve the front light-emitting amount of the pixel unit 22 to improve the front light-emitting efficiency of the display panel.

[0048] A pixel unit 22 is provided in each pixel opening 211. For example, the light-emitting layer 20 includes a first pixel unit 221, a second pixel unit 222, and a third pixel unit 223. The first pixel unit 221 may be defined as a blue pixel unit, the second pixel unit 222 may be defined as a green pixel unit, and the third pixel unit 223 may be defined as a red pixel unit. The first pixel unit 221, the second pixel unit 222, and the third pixel unit 223 are respectively provided in the above pixel openings 211, and each pixel unit 22 corresponds to a pixel opening 211.

[0049] The encapsulation layer 40 is provided on the side of the pixel definition layer 21 facing away from the array substrate 10 and covers the entire pixel definition layer 21. Part of the encapsulation layer 40 is filled in the pixel openings 211 and covers each pixel unit 22. The surface of the encapsulation layer 40 facing away from the array substrate 10 is relatively flat to facilitate the formation of an optical adhesive layer 50 on the surface of the encapsulation layer 40.

[0050] The optical adhesive layer 50 is located on the side of the encapsulation layer 40 facing away from the array substrate 10. The optical adhesive layer 50 is provided with a plurality of microlens openings 51, and the plurality of microlens openings 51 are arranged at intervals. The plurality of microlens openings 51 and the plurality of pixel openings 211 are respectively arranged in one-to-one correspondence, that is, the microlens openings 51 and the pixel openings 211 are opposite to each other.

[0051] A microlens structure 60 is respectively provided in each microlens opening 51. This microlens structure 60 may be a convex lens, and the refractive index of the filling layer forming the microlens structure 60 is greater than the refractive index of the optical adhesive layer 50, so that the light irradiated on the interface between the optical adhesive layer 50 and the filling layer can be totally reflected, that is, the interface formed between the two can converge the large-angle light so that the light is emitted at a small angle, thereby improving the front light-emitting efficiency of the display panel 100.

[0052] The display panel 100 provided by the embodiment of the present application is a curved display screen, which includes a flat display area 101 and a curved display area 102 connected to the flat display area 101. For example, the curved display area 102 can be arranged on one side of the flat display area 101; or, the curved display area 102 can be arranged on both sides of the flat display area 101; or the curved display area 102 can surround the flat display area 101 on all sides. The embodiment of the present application does not limit this.

[0053] Preferably, the curved display area 102 is arranged on both sides of the flat display area 101. The two side edge areas of the curved display screen are the curved display area 102, and the curvature of the curved display area 102 is close to 78°. The middle area of the curved display screen is the flat display area 101.

[0054] However, when the above-mentioned microlens structure 60 is applied to the OLED display panel 100 with a curved surface, since the brightness aggregation degree of the microlens structure 60 for each pixel unit 22 is different at a large viewing angle, the light attenuation degree of the light emitted by each pixel unit 22 is different. Therefore, the OLED display panel 100 has a color shift problem at a large viewing angle.

[0055] For this reason, the embodiment of the present application improves the color shift problem of the display panel 100 at a large viewing angle by making the outer expansion distance L' of at least one pixel unit 22 in the flat display area 101 of the display panel 100 greater than the outer expansion distance L of the pixel unit 22 in the curved display area 102.

[0056] Refer to Figure 4 , first, the outer expansion distance of the above-mentioned pixel unit 22 is described. In the embodiment of the present application, along the direction perpendicular to the array substrate 10, the minimum contour projection formed by the microlens opening 51 on the array substrate 10 surrounds the minimum contour projection formed by the pixel opening 211 on the array substrate 10, and there is a certain interval distance between the two minimum contour projections. This interval distance can be defined as the outer expansion distance of the pixel unit 22.

[0057] Exemplarily, the microlens opening 51 is projected along the direction perpendicular to the array substrate 10, and its minimum contour projection formed on the encapsulation layer 40 is the first contour, that is, the microlens opening 51 is projected along the direction perpendicular to the array substrate 10, and the projection of its small-diameter end on the encapsulation layer 40 is the first contour.

[0058] The pixel opening 211 is projected along the direction perpendicular to the array substrate 10, and its minimum contour projection formed on the encapsulation layer 40 is the second contour, that is, the pixel opening 211 is projected along the direction perpendicular to the array substrate 10, and the projection of its small-diameter end on the array substrate 10 is the second contour.

[0059] In the embodiment of the present application, the first contour encloses the second contour, the centers of the first contour and the second contour coincide, and the first contour and the second contour are symmetric about the center; that is, along the circumferential direction of the first contour, the distances from each position of the first contour to the edge of the second contour are equal, and the distance between the first contour and the second contour is defined as the outward expansion distance of the pixel unit 22.

[0060] For example, the above-mentioned pixel opening 211 and the microlens opening 51 are both trapezoidal in reverse, and the pixel opening 211 and the microlens opening 51 are both centered and oppositely arranged. The centers of the first contour and the second contour coincide, and the first contour and the second contour are symmetric about the center, and the two can form a concentric double-square structure. Further, in some embodiments, by changing the opening shapes of the above-mentioned pixel opening 211 and the microlens opening 51, the first contour and the second contour can form a concentric annular structure, and the present embodiment does not limit this.

[0061] In the embodiment of the present application, to improve the color shift problem of the above-mentioned display panel 100 at a large viewing angle, at least one of the above-mentioned plurality of pixel units 22 can be made such that its outward expansion distance L' in the planar display area 101 is greater than the outward expansion distance L of the arc-shaped display area 102 (the outward expansion distance L' in Figure 4 can be referred to). For example, the outward expansion distance L' of the above-mentioned first pixel unit 221 in the planar display area 101 is greater than its outward expansion distance L in the arc-shaped display area 102; or, the outward expansion distances L' of the above-mentioned first pixel unit 221 and the second pixel unit 222 in the planar display area 101 are both greater than their respective outward expansion distances L in the arc-shaped display area 102.

[0062] With such a setting, compared with the related art solution where the outward expansion distances of the pixel units 22 in the planar display area 101 and the arc-shaped display area 102 are equal, since as the outward expansion distance of the pixel unit 22 increases, the large-angle light irradiated on the interface between the optical adhesive layer 50 and the microlens structure is gathered and emitted, the attenuation amplitude of the light emitted by the pixel unit 22 becomes smaller, and the proportion of this color light in white light increases. Therefore, by reducing the outward expansion distance of the pixel unit 22 in the arc-shaped display area 102 to increase the attenuation degree of the light emitted by the pixel unit 22 located in the arc-shaped display area 102, the proportion of this color light emitted by the pixel unit in the arc-shaped display area in white light is reduced, so that the proportions of the light emitted by the pixel unit 22 in the planar display area 101 and the arc-shaped display area 102 in white light are consistent, thereby improving the color shift problem of the display panel 100 at a large viewing angle.

[0063] In one embodiment, when the display panel 100 has a blue shift problem at a large viewing angle, the outward expansion distance L' of the first pixel unit 221 in the planar display area 101 can be made greater than its outward expansion distance L in the arc-shaped display area 102.

[0064] For example, in the embodiments of the present application, to ensure the front light extraction rate of the display panel 100, the outward expansion distance L of the first pixel unit 221 in the arc display area 102 can be reduced, so that the outward expansion distance L of the first pixel unit 221 located in the arc display area 102 after adjustment is less than the outward expansion distance L' of the first pixel unit 221 in the flat display area 101. By setting it in this way, the proportion of large-angle blue light in the arc display area 102 is reduced, so that the proportion of blue light in the white light in the flat display area 101 and the arc display area 102 is the same, thereby improving the problem of blue shift under a large viewing angle of the display panel 100.

[0065] In another embodiment, when the problem of greenish-blue shift occurs under a large viewing angle of the display panel 100, the outward expansion distance L' of the second pixel unit 222 in the flat display area 101 can be made greater than its outward expansion distance L in the arc display area 102.

[0066] For example, in the embodiments of the present application, to ensure the front light extraction rate of the display panel 100, the outward expansion distance L of the second pixel unit 222 in the arc display area 102 can be reduced, so that the outward expansion distance L' of the second pixel unit 222 located in the arc display area 102 after adjustment is less than the outward expansion distance L' of the second pixel unit 222 in the flat display area 101. By setting it in this way, the proportion of large-angle green light in the arc display area 102 is reduced, so that the proportion of green light in the white light in the flat display area 101 and the arc display area 102 is the same, thereby improving the problem of greenish-blue shift under a large viewing angle of the display panel 100.

[0067] In another embodiment, when the problem of yellow shift occurs under a large viewing angle of the display panel 100, the outward expansion distances L' of the first pixel unit 221 and the second pixel unit 222 in the flat display area 101 can be made greater than their respective outward expansion distances L in the arc area.

[0068] For example, in the embodiments of the present application, to ensure the front light extraction rate of the display panel 100, the outward expansion distance L of the first pixel unit 221 in the arc display area 102 can be reduced, so that the outward expansion distance L of the first pixel unit 221 in the arc display area 102 is less than its outward expansion distance L' in the flat display area 101; similarly, the outward expansion distance L of the second pixel unit 222 in the arc display area 102 can be reduced, so that the outward expansion distance L' of the second pixel unit 222 in the arc display area 102 is less than its outward expansion distance L in the flat display area 101. By setting it in this way, the proportions of large-angle blue light and green light in the arc display area 102 are reduced simultaneously, thereby improving the problem of yellow shift under a large viewing angle of the display panel 100.

[0069] It should be noted that when the above display panel 100 has a color deviation problem, the outward expansion distance L of a pixel unit 22 in the arc display area 102 can be adjusted so that the outward expansion distance L' of the pixel unit 22 in the flat display area 101 is greater than its outward expansion distance L in the arc display area 102, so as to improve the color deviation problem of the display panel 100; or two or three pixel units 22 are selected from each pixel unit 22, and the outward expansion distances L of each in the arc display area 102 are adjusted in a combined manner to improve the color deviation problem of the display panel 100. The embodiments of the present application do not limit this.

[0070] Based on the above embodiments, in the OLED display panel 100 in the embodiments of the present application, the outward expansion distance L of at least one pixel unit 22 in the flat display area 101 is greater than the outward expansion distance L' of the pixel unit 22 in the arc display area 102, and the difference between the outward expansion distance L' and the outward expansion distance L is greater than or equal to 0.5 μm. For example, the difference between the outward expansion distance L' and the outward expansion distance L in the embodiments of the present application can be 1 or 2 μm. Such a setting can further improve the color deviation problem of the OLED display panel 100.

[0071] Furthermore, in the embodiments of the present application, the arc display area 102 is provided on both sides of the flat display area 101, and along the direction from the flat display area 101 to the arc display area 102, the outward expansion distance L of each pixel unit 22 located in the arc display area 102 gradually decreases. With such a setting, along the direction from the flat display area 101 to the arc display area, the proportion of this color light in white light can be gradually reduced, and the viewing angle transition from the flat display area 101 to the arc display area 102 can be made more natural, avoiding obvious viewing angle color deviation for the observer, thereby improving the display effect of the display panel 100.

[0072] As Figure 5 shown, the arc display area 102 in the embodiments of the present application includes N equally spaced sub-areas 1021, where N is a positive integer greater than or equal to 2, and the difference in the outward expansion distance L' of the pixel units 22 in two adjacent sub-areas 1021 is (L'-L) / N.

[0073] For example, the above N is equal to 5, that is, the arc display area 102 includes 5 sub-areas 1021; the difference between the outward expansion distance L' of the pixel unit 22 in the flat display area 101 and the outward expansion distance L' of the pixel unit 22 in the arc display area 102 is 0.5 μm, then the difference between the outward expansion distances L' between two adjacent sub-areas 1021 is 0.1 μm.

[0074] The embodiments or implementation manners in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0075] It should be noted that the "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when describing a specific feature, structure or characteristic in combination with an embodiment, it is within the knowledge scope of those skilled in the art to implement such feature, structure or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0076] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part according to the context, the term "one or more" used in the text can be used to describe any feature, structure or characteristic in the sense of a singular, or can be used to describe a combination of features, structures or characteristics in the sense of a plural. Similarly, at least in part according to the context, terms such as "a" or "the" can also be understood to convey a singular usage or a plural usage.

[0077] In addition, in order to facilitate the description, spatial relative terms can be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of an element or feature relative to other elements or features as shown in the figure. Spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive words used in the text can be interpreted accordingly.

[0078] The term "substrate" used in the text refers to the material on which subsequent material layers are added. The substrate itself can be patterned. The material added on top of the substrate can be patterned or can remain unpatterned. In addition, the substrate can include a wide range of materials, such as silicon, germanium, gallium arsenide, indium phosphide, etc. Alternatively, the substrate can be made of non-conductive materials (such as glass, plastic or sapphire wafers, etc.).

[0079] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that, The display panel has a planar display area and an arc-shaped display area connected to the planar display area. The display panel includes an array substrate, a light-emitting layer, a packaging layer, and an optical adhesive layer that are sequentially stacked. The light-emitting layer includes a pixel definition layer disposed between the packaging layer and the array substrate. The pixel definition layer has a plurality of pixel openings, and a pixel unit is disposed in each pixel opening. The optical adhesive layer has a plurality of microlens openings, and a microlens structure is disposed in each microlens opening, and each pixel opening corresponds to each microlens opening one by one. In a direction perpendicular to the array substrate, a projection of the small-diameter end of the microlens opening on the packaging layer forms a first contour, and a projection of the small-diameter end of the pixel opening on the array substrate forms a second contour. The first contour surrounds the second contour and forms a centrosymmetric structure. The distance between the first contour and the second contour is the outward expansion distance of the pixel unit. Among the plurality of pixel units of the display panel, the outward expansion distance L' of at least one pixel unit in the planar display area is greater than its outward expansion distance L in the arc-shaped display area.

2. The display panel according to claim 1, characterized in that, The light-emitting layer includes a first pixel unit, a second pixel unit, and a third pixel unit. For at least one of the first pixel unit, the second pixel unit, and the third pixel unit, its outward expansion distance L' in the planar display area is greater than its outward expansion distance L in the arc-shaped display area.

3. The display panel according to claim 2, characterized in that, The first pixel unit is a blue pixel unit, and its outward expansion distance L' in the planar display area is greater than its outward expansion distance L in the arc-shaped display area.

4. The display panel according to claim 2, characterized in that, The second pixel unit is a green pixel unit, and its outward expansion distance L' in the planar display area is greater than its outward expansion distance L in the arc-shaped display area.

5. The display panel according to claim 2, characterized in that, The first pixel unit is a blue pixel unit, and the second pixel unit is a green pixel unit. The outward expansion distance L' of the first pixel unit in the planar display area is greater than its outward expansion distance L in the arc-shaped display area. Moreover, the outward expansion distance L' of the second pixel unit in the planar display area is greater than its outward expansion distance L in the arc-shaped display area.

6. The display panel according to any one of claims 1 to 5, characterized in that, The first contour and the second contour enclose a concentric square-shaped structure or a concentric circular structure.

7. The display panel according to claim 6, characterized in that, In a direction perpendicular to the array substrate, the cross-sectional shapes of the pixel opening and the microlens opening are trapezoidal in an inverted shape.

8. The display panel according to claim 6, characterized in that, The difference between the outward expansion distance L' and the outward expansion distance L is ≥ 0.5 μm.

9. The display panel according to claim 6, characterized in that, In a direction from the planar display area to the arc-shaped display area, the outward expansion distance L of each pixel unit located in the arc-shaped display area gradually decreases.

10. The display panel according to claim 9, characterized in that, The arc-shaped display area includes N equally spaced sub-regions, where N is a positive integer and N ≥ 2. The difference in the change of the outward expansion distance L of the pixel units in two adjacent sub-regions is (L' - L) / N.

11. A display device, characterized in that, A display panel according to any one of claims 1 to 10.

Images