Display panel, preparation method thereof and display device

Abstract

The invention discloses a display panel, a preparation method thereof and a display device. The display panel comprises a first display area and a second display area which are alternately arranged in the first direction. The pixel openings include first pixel openings located in the first display area and second pixel openings located in the second display area. The light-emitting layer comprises a first light-emitting sub-layer located in the first pixel opening and a second light-emitting sub-layer located in the second pixel opening, and the thickness of the first light-emitting sub-layer on the side wall of the first pixel opening is smaller than the thickness of the second light-emitting sub-layer on the side wall of the second pixel opening. The thickness of the light-emitting layer on the bottom of the pixel opening is larger than the thickness of the light-emitting layer on the side wall of the pixel opening. The size of the first pixel opening in the first direction is larger than the size of the second pixel opening in the first direction. Therefore, the thickness of the first sub-light-emitting layer seen by the first display area under the large viewing angle is increased, the brightness of the first display area under the large viewing angle is improved, the light and dark stripe phenomenon is improved, and the display uniformity is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] With the development of display technology, organic light-emitting diodes (OLEDs) have captured a large market share due to their advantages such as thinness, high brightness, and low power consumption. This display device uses organic light-emitting materials as the light source and thin-film transistors (TFTs) to control the current, adjusting the brightness of the display panel to display different images. Because traditional polarizers (POLs) reduce transmittance and affect the light-emitting display effect, the POL-less process (PLP) technology, which combines color filters (CFs) with black matrices (BMs), has emerged. The high-transmittance CF material can improve the light extraction efficiency of the emissive layer (EL) and reduce screen power consumption, while the black BM can absorb ambient light and reduce the reflectivity of the metal within the screen, enabling PLP technology products to improve device brightness and reduce power consumption.

[0003] Because the EL layer of PLP products has BM, the overall light blocking angle is small, and bright and dark stripes are easy to appear at a large viewing angle (70~90°), and they have a certain periodicity. Summary of the Invention

[0004] This application provides a display panel, its manufacturing method, and a display device, which can improve the phenomenon of bright and dark stripes and enhance display uniformity.

[0005] This application provides a display panel, which includes a first display area and a second display area alternately arranged along a first direction. The display panel includes: a substrate, the first direction being parallel to the surface of the substrate; a pixel definition layer located on the substrate, the pixel definition layer including a pixel opening, the pixel opening including a first pixel opening located in the first display area and a second pixel opening located in the second display area; and a light-emitting layer including a first sub-light-emitting layer located within the first pixel opening and a second sub-light-emitting layer located within the second pixel opening, wherein the thickness of the first sub-light-emitting layer on the sidewall of the first pixel opening is less than the thickness of the second sub-light-emitting layer on the sidewall of the second pixel opening, and the thickness of the light-emitting layer at the bottom of the pixel opening is greater than the thickness on the sidewall of the pixel opening; wherein the dimension of the first pixel opening along the first direction is greater than the dimension of the second pixel opening along the first direction.

[0006] In some embodiments, the first sub-emitting layer includes a first sub-pixel, the second sub-emitting layer includes a second sub-pixel, and the first sub-pixel and the second sub-pixel emit the same color; the size of the first sub-pixel along the first direction is larger than the size of the second sub-pixel along the first direction.

[0007] In some embodiments, the first sub-light-emitting layer includes a first green sub-pixel, the second sub-light-emitting layer includes a second green sub-pixel, the first green sub-pixel has a first size along the first direction, the second green sub-pixel has a second size along the first direction, and the first size is larger than the second size.

[0008] In some embodiments, the difference between the first dimension and the second dimension is less than 1.5 micrometers.

[0009] In some embodiments, the first sub-emitting layer further includes a first red sub-pixel and a first blue sub-pixel, and the second sub-emitting layer further includes a second red sub-pixel and a second blue sub-pixel; the first red sub-pixel has a third size along the first direction, the second red sub-pixel has a fourth size along the first direction, and the third size is larger than the fourth size; the first blue sub-pixel has a fifth size along the first direction, the second blue sub-pixel has a sixth size along the first direction, and the fifth size is larger than the sixth size.

[0010] In some embodiments, the difference between the third dimension and the fourth dimension is less than the difference between the first dimension and the second dimension, and the difference between the fifth dimension and the sixth dimension is less than the difference between the first dimension and the second dimension.

[0011] In some embodiments, the top view pattern of the first sub-pixel and the second sub-pixel is circular, and the radius of the first sub-pixel is larger than the radius of the second sub-pixel.

[0012] In some embodiments, the method further includes: a filter layer located on the side of the pixel definition layer away from the substrate layer and disposed corresponding to the pixel opening; and a light-shielding layer located on the side of the pixel definition layer away from the substrate and located between adjacent filter layers.

[0013] This application embodiment also provides a method for fabricating a display panel, comprising: providing a substrate; forming a pixel definition layer on the substrate, the pixel definition layer including pixel openings; providing a magnetic plate on a side of the substrate opposite to the pixel definition layer, and providing a mask on the side of the substrate opposite to the magnetic plate, the magnetic plate including strong magnetic regions and weak magnetic regions alternately arranged along a first direction, the distance between the mask and the substrate in the strong magnetic region being less than the distance between the mask and the substrate in the weak magnetic region, the pixel opening including a first pixel opening located in the strong magnetic region and a second pixel opening located in the weak magnetic region, the size of the first pixel opening along the first direction being greater than the size of the second pixel opening along the first direction; and depositing a light-emitting layer within the pixel opening through the mask.

[0014] This application also provides a display device, including the display panel in any of the above embodiments.

[0015] In the display panel provided in this application embodiment, under normal circumstances, what is seen at a wide viewing angle is a first sub-emissive layer on the sidewall of the first pixel opening and a second sub-emissive layer on the sidewall of the second pixel opening. Since the thickness of the first sub-emissive layer on the sidewall of the first pixel opening is less than the thickness of the second sub-emissive layer on the sidewall of the second pixel opening, it easily leads to dark stripes appearing in the first display area and bright stripes appearing in the second display area. In this application, by setting the size of the first pixel opening along the first direction to be greater than the size of the second pixel opening along the first direction, the sidewall of the first pixel opening moves away from the center of the first sub-emissive layer, making the position of the first display area closer to the bottom of the first pixel opening when viewed at a wide viewing angle. Furthermore, since the thickness of the emissive layer at the bottom of the pixel opening is greater than the thickness on the sidewall, the thickness of the first sub-emissive layer seen in the first display area at a wide viewing angle increases, thereby improving the brightness of the first display area at a wide viewing angle, thus improving the phenomenon of bright and dark stripes and enhancing the uniformity of the display.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 This is a top view structural diagram of a display panel provided in some embodiments of this application; Figure 2 yes Figure 1 A schematic diagram of the mask and magnetic plate during the formation of the light-emitting layer in a display panel. Figure 3 yes Figure 1 A cross-sectional view of the central display panel in the first display area; Figure 4 yes Figure 1 A cross-sectional view of the central display panel in the second display area; Figure 5 This is provided by some embodiments of this application. Figure 1 A schematic diagram of the cross-sectional structure of the central display panel along line B-B1; Figure 6 This is a top view schematic diagram of the sub-pixels in the second display area provided in some embodiments of this application; Figure 7 This is a top view of the sub-pixels in the first display area provided in some embodiments of this application; Figure 8 This is another top view structural diagram of a sub-pixel in the first display area provided in some embodiments of this application; Figure 9 This is another top view structural diagram of a sub-pixel in the first display area provided in some embodiments of this application; Figure 10 This is a flowchart illustrating a method for forming a display panel according to some embodiments of this application; Figure 11 This is a top view schematic diagram of the mask and pixel opening structure during the fabrication process of the display panel provided in some embodiments of this application; Figure 12 This is a schematic diagram of the structure of a display device provided in some embodiments of this application.

[0020] Explanation of reference numerals in the attached figures: 100. Display panel; X, first direction; Y, second direction; A1, first display area; A2, second display area; 10. Substrate; 20. Pixel definition layer; 21. Pixel aperture; 211. First pixel aperture; 212. Second pixel aperture; 30. Emissive layer; 31, First sub-emitting layer; 311, First sub-pixel; G1, First green sub-pixel; R1, First red sub-pixel; B1, First blue sub-pixel; 32, Second sub-emitting layer; 321, Second sub-pixel; G2, Second green sub-pixel; R2, Second red sub-pixel; B2, Second blue sub-pixel; 40. Filter layer; 50. Light-blocking layer; 60. Magnetic plate; 61. Strong magnetic area; 62. Weak magnetic area; 70. Mask; 71. Shaded area; 81. Anode layer; 82. Cathode layer; 91. Encapsulation layer; 92. Protective layer; 200. Display device. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] Please see Figures 1 to 4 , Figure 1 This is a top view structural diagram of a display panel provided in some embodiments of this application. Figure 2 yes Figure 1 A schematic diagram of the structure of the mask and magnetic plate in the process of forming the light-emitting layer of the display panel. Figure 3 yes Figure 1 A cross-sectional view of the central display panel in the first display area. Figure 4 yes Figure 1 A cross-sectional view of the central display panel in the second display area.

[0023] See Figure 1 The display panel includes a first display area A1 and a second display area A2 alternately arranged along a first direction X, which is the length direction of the display panel. That is, both the first display area A1 and the second display area A2 extend along a second direction Y (i.e., the width direction of the display panel). The thickness direction of the display panel is represented by the Z direction. At a wide viewing angle, the first display area A1 appears as dark stripes, and the second display area A2 appears as bright stripes. For details, please refer to [link to relevant documentation]. Figures 2-4 The description.

[0024] See Figure 2 During the fabrication of the display panel, the light-emitting layer 30 is deposited through a mask 70, such as a fine metal mask (FMM). Under the influence of the magnetic force of the magnetic plate 60 and the gravity of the mask 70 itself, the mask 70 exhibits periodic deformation on a macroscopic scale. In the strong magnetic region 61, the mask 70 is attracted by a strong magnetic force and is positioned close to the substrate 10, resulting in a small bonding gap; in the weak magnetic region 62, the mask 70 is subjected to a weaker magnetic force and is positioned further away from the substrate 10, resulting in a larger bonding gap.

[0025] See Figure 3 and Figure 4 When the light-emitting layer 30 is deposited inside the pixel opening 21, the thickness of the light-emitting layer 30 in the middle of the pixel opening 21 is relatively uniform, while the thickness of the sidewall of the pixel opening 21 is uneven. That is, the thickness of the light-emitting layer 30 at the bottom of the pixel opening 21 is greater than the thickness at the sidewall of the pixel opening 21.

[0026] like Figure 3 As shown, when the light-emitting layer 30 is deposited in the strong magnetic region 61, because the distance D1 between the mask 70 and the substrate 10 is relatively close, the thickness of the first sub-light-emitting layer 31 on the sidewall of the first pixel opening 211 is relatively small. Figure 4 As shown, when the light-emitting layer 30 is deposited in the weak magnetic region 62, the second sub-light-emitting layer 32 on the sidewall of the second pixel opening 212 has a larger thickness due to the greater distance D2 between the mask 70 and the substrate 10. Since the light-emitting layer 30 on the sidewall of the pixel opening 21 is typically seen from a wide viewing angle, the area with a smaller thickness of the light-emitting layer 30 on the sidewall of the pixel opening 21 exhibits low brightness, forming the first display area A1, while the area with a larger thickness of the light-emitting layer 30 on the sidewall of the pixel opening 21 exhibits high brightness, forming the second display area A2. The first display area A1 and the second display area A2 alternately form bright and dark stripes. Furthermore, the width ratio (Lc / Ld) of the strong / weak magnetic region 62 is approximately equal to the width ratio (La / Lb) of the first display area A1 / second display area A2.

[0027] Based on this, this application provides a display panel, the display panel including a first display area and a second display area alternately arranged along a first direction, the display panel including: a substrate, the first direction being parallel to the surface of the substrate; a pixel definition layer located on the substrate, the pixel definition layer including a pixel opening, the pixel opening including a first pixel opening located in the first display area and a second pixel opening located in the second display area; a light-emitting layer including a first sub-light-emitting layer located in the first pixel opening and a second sub-light-emitting layer located in the second pixel opening, the thickness of the first sub-light-emitting layer on the sidewall of the first pixel opening being less than the thickness of the second sub-light-emitting layer on the sidewall of the second pixel opening, and the thickness of the light-emitting layer at the bottom of the pixel opening being greater than the thickness on the sidewall of the pixel opening; wherein, the dimension of the first pixel opening along the first direction is greater than the dimension of the second pixel opening along the first direction.

[0028] In the display panel provided in this application embodiment, under normal circumstances, what is seen at a wide viewing angle is a first sub-emissive layer on the sidewall of the first pixel opening and a second sub-emissive layer on the sidewall of the second pixel opening. Since the thickness of the first sub-emissive layer on the sidewall of the first pixel opening is less than the thickness of the second sub-emissive layer on the sidewall of the second pixel opening, it easily leads to dark stripes appearing in the first display area and bright stripes appearing in the second display area. In this application, by setting the size of the first pixel opening along the first direction to be greater than the size of the second pixel opening along the first direction, the sidewall of the first pixel opening moves away from the center of the first sub-emissive layer, making the position of the first display area closer to the bottom of the first pixel opening when viewed at a wide viewing angle. Furthermore, since the thickness of the emissive layer at the bottom of the pixel opening is greater than the thickness on the sidewall, the thickness of the first sub-emissive layer seen in the first display area at a wide viewing angle increases, thereby improving the brightness of the first display area at a wide viewing angle, thus improving the phenomenon of bright and dark stripes and enhancing the uniformity of the display.

[0029] The structure of the display panel provided in the embodiments of this application will be described below with reference to the accompanying drawings. Please refer to the accompanying drawings. Figure 1 and Figure 5 , Figure 5 This is provided by some embodiments of this application. Figure 1 A schematic diagram of the cross-sectional structure of the display panel along B-B1.

[0030] The display panel 100 includes a first display area A1 and a second display area A2 alternately arranged along a first direction X. The display panel 100 includes a substrate 10, a pixel definition layer 20, and a light-emitting layer 30. The first direction X is parallel to the surface of the substrate 10. The pixel definition layer 20 is located on the substrate 10 and includes a pixel opening 21. The pixel opening 21 includes a first pixel opening 211 located in the first display area A1 and a second pixel opening 212 located in the second display area A2. The light-emitting layer 30 includes a first sub-light-emitting layer 31 located within the first pixel opening 211 and a second sub-light-emitting layer 32 located within the second pixel opening 212. The thickness H1' of the first sub-light-emitting layer 31 on the sidewall of the first pixel opening 211 is less than the thickness H2' of the second sub-light-emitting layer 32 on the sidewall of the second pixel opening 212, and the thickness of the light-emitting layer 30 at the bottom of the pixel opening 21 is greater than the thickness on the sidewall of the pixel opening 21. Wherein, the size P1 of the first pixel opening 211 along the first direction X is greater than the size P2 of the second pixel opening 212 along the first direction X.

[0031] It should be noted that the first display area A1 corresponds to the strong magnetic area 61, and the second display area A2 corresponds to the weak magnetic area 62. Specifically, one first display area A1 corresponds to one strong magnetic area 61, and one second display area A2 corresponds to one weak magnetic area 62. When designing the dimensions of the first pixel opening 211 and the second pixel opening 212, the distribution of the strong magnetic area 61 and the weak magnetic area 62 during the deposition of the light-emitting layer 30 can be used as a basis.

[0032] In some embodiments, the width La of the first display area A1 is greater than the width Lb of the second display area A2, where the width refers to the dimension of the display area along the second direction Y, which is related to the width of the strong magnetic area 61 and the weak magnetic area 62.

[0033] Taking a display panel 100 with a resolution of 300ppi as an example, the width of one subpixel along the first direction X is 0.0846mm. The width of the first display area A1 can be 6mm~15mm, involving 70~177 subpixels, and the width of the second display area A2 can be 12mm~35mm, involving 20~50 subpixels. The specific number of subpixels here is related to the product resolution; the higher the resolution, the smaller the subpixels, and the more subpixels are involved.

[0034] It should be noted that, Figure 5 Only one sub-pixel in the first display area A1 and one sub-pixel in the second display area A2 are displayed. In fact, there are multiple sub-pixels in the first display area A1 and multiple sub-pixels in the second display area A2.

[0035] See Figure 5 Due to manufacturing process limitations, the thickness of the light-emitting layer 30 at the bottom of the pixel opening 21 is greater than its thickness on the sidewall of the pixel opening 21. For example, the thickness H1 of the first sub-light-emitting layer 31 at the bottom of the first pixel opening 211 is greater than its thickness H1' on the sidewall of the first pixel opening 211, and the thickness H2 of the second sub-light-emitting layer 32 at the bottom of the second pixel opening 212 is greater than its thickness H2' on the sidewall of the second pixel opening 212. The thickness H1' of the first sub-light-emitting layer 31 on the sidewall of the first pixel opening 211 is less than its thickness H2' on the sidewall of the second sub-light-emitting layer 32.

[0036] It should be noted that the thickness of the light-emitting layer 30 on the sidewall of the pixel opening 21 is inherently uneven. Therefore, when comparing the thickness of the first sub-light-emitting layer 31 on the sidewall of the first pixel opening 211 with the thickness of the second sub-light-emitting layer 32 on the sidewall of the second sub-pixel opening 321, the thicknesses of the first sub-light-emitting layer 31 and the second sub-light-emitting layer 32 at the same position on the sidewall should be compared. The thickness of the light-emitting layer at the same position on the sidewall can be based on the thickness at that position perpendicular to the sidewall direction.

[0037] The display panel 100 may further include a light filter layer 40 and a light-shielding layer 50. The light filter layer 40 is located on the side of the pixel definition layer 20 facing away from the substrate 10 and is disposed corresponding to the pixel opening 21. The light-shielding layer 50 is located on the side of the pixel definition layer 20 facing away from the substrate 10 and is located between adjacent light filter layers 40. The light-shielding layer 50 blocks light at wide viewing angles, thus affecting the position of the light-emitting layer 30 as seen at wide viewing angles.

[0038] At the same wide viewing angle, since the size P1 of the first pixel opening 211 along the first direction X is larger than the size P2 of the second pixel opening 212 along the first direction X, the position of the first sub-light-emitting layer 31 seen by the first display area A1 is closer to the center of the first sub-light-emitting layer 31. Therefore, the thickness of the first sub-light-emitting layer 31 seen by the first display area A1 at the wide viewing angle is increased, and the difference between the thickness of the first sub-light-emitting layer 31 and the thickness of the second sub-light-emitting layer 32 seen at the wide viewing angle is reduced, thereby improving the phenomenon of bright and dark stripes.

[0039] See Figure 5 The thickness H1 of the first sub-emissive layer 31 as seen from a wide viewing angle is comparable to the thickness H2' of the second sub-emissive layer 32 as seen from the same viewing angle, that is, comparable to the thickness H2' of the second sub-emissive layer 32 on the sidewall of the second pixel opening 212. This improves the uniformity of display brightness.

[0040] In some embodiments, the top view pattern of the pixel opening 21 is circular, and the radius of the first pixel opening 211 is larger than the radius of the second pixel opening 212.

[0041] In some embodiments, the first sub-light-emitting layer 31 includes a first sub-pixel 311, and the second sub-light-emitting layer 32 includes a second sub-pixel 321, wherein the first sub-pixel 311 and the second sub-pixel 321 emit the same color. The dimension X1 of the first sub-pixel 311 along the first direction X is greater than the dimension X2 of the second sub-pixel 321 along the first direction X.

[0042] Since the size design of sub-pixels of different emitting colors can be different, the size of the first sub-pixel 311 and the second sub-pixel 321 of the same emitting color can be compared. That is, relative to the second sub-pixel 321 of a certain emitting color in the second display area A2, the phenomenon of bright and dark stripes can be improved by increasing the size of the sub-pixel of the same emitting color in the first display area A1.

[0043] The display panel 100 may further include an anode layer 81 and a cathode layer 82. The anode layer 81 is located on the substrate 10, the pixel definition is located on the side of the anode layer 81 opposite to the substrate 10, and the pixel opening 21 exposes the anode layer 81. The light-emitting layer 30 is connected to the anode layer 81. The cathode layer 82 is located on the pixel definition layer 20 and is connected to the light-emitting layer 30.

[0044] The display panel 100 may also include an encapsulation layer 91 and a protective layer 92. The encapsulation layer 91 is located between the cathode layer 82 and the light-shielding layer 50, and the protective layer 92 is located on the side of the filter layer 40 and the light-shielding layer 50 away from the substrate 10.

[0045] Please see Figure 6 and Figure 7 , Figure 6 This is a top view schematic diagram of the sub-pixels in the second display area provided in some embodiments of this application. Figure 7 This is a top view of the sub-pixel structure in the first display area provided in some embodiments of this application.

[0046] In some embodiments, the first sub-light-emitting layer 31 includes a first green sub-pixel G1, the second sub-light-emitting layer 32 includes a second green sub-pixel G2, and the first green sub-pixel G1 has a first size R along the first direction X. G The second green sub-pixel G2 has a second size R along the first direction X. G And the first size R G 'Greater than the second size R G .

[0047] The first sub-light-emitting layer 31 further includes a first red sub-pixel R1 and a first blue sub-pixel B1, and the second sub-light-emitting layer 32 further includes a second red sub-pixel R2 and a second blue sub-pixel B2. The first red sub-pixel R1 has a third size R along the first direction X. R The second red sub-pixel R2 has a fourth size R along the first direction X. R And the third dimension R R 'Equal to the fourth dimension R' R The first blue sub-pixel B1 has a fifth size R along the first direction X. BThe second blue sub-pixel B2 has a sixth size R along the first direction X. B And the fifth dimension R B 'Equal to the sixth dimension R' B .

[0048] In other words, this embodiment improves the bright and dark stripe phenomenon by increasing the size of the first green sub-pixel G1 in the first display area A1, or by decreasing the size of the second green sub-pixel G2 in the second display area A2, relative to the first green sub-pixel G1 in the first display area A1. This is because the luminous efficiency of green sub-pixels is higher and their brightness is greater than that of sub-pixels of other luminous colors. Therefore, bright stripes are mainly produced by green sub-pixels, so improving only the green sub-pixels can reduce modifications and ensure the improvement effect of bright and dark stripes.

[0049] In some embodiments, the first size R G 'With the second dimension R G The difference is less than 1.5 micrometers. Within this range, the thickness of the luminescent layer 30 of the first green sub-pixel G1 is comparable to that of the second green sub-pixel G2 when viewed from the same large angle.

[0050] Please see Figure 8 , Figure 8 This is another top view structural diagram of the sub-pixels in the first display area provided in some embodiments of this application. Figure 8 Examples and Figure 7 The difference between the embodiments lies in the size of the first blue sub-pixel B1 and the first red sub-pixel R1; the similarity is that the first size R... G 'Greater than the second size R G .

[0051] The first sub-light-emitting layer 31 further includes a first red sub-pixel R1 and a first blue sub-pixel B1, and the second sub-light-emitting layer 32 further includes a second red sub-pixel R2 and a second blue sub-pixel B2. The first red sub-pixel R1 has a third size R along the first direction X. R The second red sub-pixel R2 has a fourth size R along the first direction X. R And the third dimension R R 'Greater than the fourth dimension R' R The first blue sub-pixel B1 has a fifth size R along the first direction X. B The second blue sub-pixel B2 has a sixth size R along the first direction X. B And the fifth dimension R B 'Greater than the sixth dimension R' B .

[0052] In other words, this embodiment simultaneously increases the size of the first red sub-pixel R1, the first blue sub-pixel B1, and the first green sub-pixel G1 in the first display area A1, thereby improving the effect of bright and dark stripes.

[0053] In some embodiments, R R '-R R <1.5 micrometers, R B '-R B <1.5 micrometers.

[0054] Please see Figure 9 , Figure 9 This is another top view structural diagram of the sub-pixels in the first display area provided in some embodiments of this application. Figure 9 Examples and Figure 8 The difference in the embodiments lies in the size of the first blue sub-pixel B1 and the first red sub-pixel R1. What is the same is that, compared with the second display area A2, the size of the first red sub-pixel R1, the first blue sub-pixel B1 and the first green sub-pixel G1 of the first display area A1 are increased at the same time.

[0055] exist Figure 9 In this embodiment, the first size of the first green sub-pixel G1 is Rg, the third size of the first red sub-pixel R1 is Rr, and the fifth size of the first blue sub-pixel B1 is Rb, and Rg > R G , Rr>R R Rb>R B .

[0056] In some embodiments, the first dimension Rg and the second dimension R R The difference is Rg-R G Rg-R G Less than 1.5 micrometers, and Rg-R G =R G '-R G That is, Rg=R G '.

[0057] The third dimension Rr and the fourth dimension R R The difference is Rr-R R Rr-R R Less than 1.5 micrometers, the third size Rr and the fourth size R R The difference (Rr-R) R () smaller than the first size Rg and the second size R G The difference (Rg-R) G ), that is, Rr-R R <Rg-R G .

[0058] The fifth dimension Rb and the sixth dimension R B The difference is Rb-R B The fifth dimension Rb and the sixth dimension R B The difference (Rb-R) B () smaller than the first size Rg and the second size R R The difference (Rg-R) G ), that is, Rb-R B <Rg-R G .

[0059] For example, Rg-R G =R G '-R G =1 micrometer, while Rr-R R =0.8 micrometers, Rb-R B =0.8 micrometers. Compared with the same color sub-pixels in the second display area A2, the size of the first green sub-pixel G1 in the first display area A1 is increased significantly, while the size increase of the first red sub-pixel R1 and the first blue sub-pixel B1 is smaller than that of the first green sub-pixel G1, thereby further improving the uniformity of display brightness.

[0060] Accordingly, this application also provides a method for forming a display panel, for forming the aforementioned display panel. Please refer to [link to relevant documentation]. Figure 10 , Figure 10 This is a flowchart illustrating a method for forming a display panel according to some embodiments of this application. Please refer to it in conjunction with... Figure 5 , Figure 5 The relative sizes of the first pixel opening 211 and the second pixel opening 212 are shown. (See also...) Figures 2 to 4 , Figure 2 The strong magnetic region 61 and the weak magnetic region 62 are displayed. Figure 3 and Figure 4 The structures of the first display area A1 and the second display area A2 during the vapor deposition process are shown respectively.

[0061] The method for forming the display panel includes: Step S1: Provide substrate 10; Step S2: A pixel definition layer 20 is formed on the substrate 10, the pixel definition layer 20 including a pixel opening 21; Step S3: A magnetic plate 60 is provided on the side of the substrate 10 opposite to the pixel definition layer 20, and a mask 70 is provided on the side of the substrate 10 opposite to the magnetic plate 60. The magnetic plate 60 includes a strong magnetic region 61 and a weak magnetic region 62 alternately arranged along a first direction X. The distance D1 between the mask 70 and the substrate 10 in the strong magnetic region 61 is smaller than the distance D2 between the mask 70 and the substrate 10 in the weak magnetic region 62. The pixel opening 21 includes a first pixel opening 211 located in the strong magnetic region 61 and a second pixel opening 212 located in the weak magnetic region 62. The size P1 of the first pixel opening 211 along the first direction X is larger than the size P2 of the second pixel opening 212 along the first direction X. Step S4: Evaporate the light-emitting layer 30 within the pixel opening 21 using the mask 70.

[0062] In the display panel formation method provided in this application embodiment, under normal circumstances, what is seen at a wide viewing angle is the first sub-light-emitting layer 31 on the sidewall of the first pixel opening 211 and the second sub-light-emitting layer 32 on the sidewall of the second pixel opening 212. Since the thickness of the first sub-light-emitting layer 31 on the sidewall of the first pixel opening 211 is less than the thickness of the second sub-light-emitting layer 32 on the sidewall of the second pixel opening 212, it is easy to cause dark stripes to appear in the strong magnetic area 61 and bright stripes to appear in the weak magnetic area 62. In this application, by setting the size of the first pixel opening 211 along the first direction X to be larger than the size of the second pixel opening 212 along the first direction X, the sidewall of the first pixel opening 211 moves away from the center of the first sub-light-emitting layer 31, so that the position of the strong magnetic area 61 seen at a wide viewing angle is closer to the bottom of the first pixel opening 211. Furthermore, since the thickness of the light-emitting layer 30 at the bottom of the pixel opening 21 is greater than the thickness on the sidewall, the thickness of the first sub-light-emitting layer 31 seen by the strong magnetic region 61 under a wide viewing angle is increased, thereby improving the brightness of the strong magnetic region 61 under a wide viewing angle, thus improving the phenomenon of bright and dark stripes and enhancing the uniformity of the display.

[0063] Please see Figures 2 to 4 as well as Figure 11 , Figure 11 This is a top view schematic diagram of the mask and pixel openings during the fabrication process of a display panel according to some embodiments of this application. It should be noted that... Figure 11 The top view in the text can be Figure 3 A top view after rotating 180°.

[0064] See Figure 11An opening in the mask 70 is represented by a thick circle, and the partially filled area within the opening of the mask 70 is the shadow area 71 of the mask 70. The pixel opening 21 is located within the opening of the mask 70. During evaporation, the light-emitting material is deposited from the bottom crucible onto the entire substrate 10, resulting in this shadow area 71. The thickness of the light-emitting layer 30 in this shadow area 71 is inherently uneven (causing uneven film thickness on the sidewalls of the pixel opening 21, which is less than the film thickness at the center of the pixel opening 21). Furthermore, due to the positional deviation (PPA) between the opening of the mask 70 and the pixel opening 21, the film thickness of the light-emitting layer 30 at the edge of the pixel opening 21 in the strong magnetic region 61 becomes even more uneven (i.e., thinner), thus exacerbating the dark stripes.

[0065] Therefore, in this embodiment of the application, the radius of the pixel opening 21 of the sub-pixel corresponding to the dark stripe area is increased to form a difference with the pixel opening 21 of the sub-pixel corresponding to the bright stripe area, so as to compensate for the uneven brightness caused by the difference in film thickness of the light-emitting layer 30 at the edge of the pixel opening 21 caused by the strong / magnetic area and PPA.

[0066] This application also provides a display device, which includes the display panel in any of the above embodiments.

[0067] Please see Figure 12 , Figure 12 This is a schematic diagram of the structure of a display device provided in some embodiments of this application.

[0068] The display device 200 includes a device body and a display panel 100, which can be the display panel in any of the above embodiments. Furthermore, the device body may include a frame, driving components, a power supply, etc., and the display device 200 can be a mobile phone, tablet, television, or other display terminal, without limitation.

[0069] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0071] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel (100), characterized in that, The display panel (100) includes a first display area (A1) and a second display area (A2) alternately arranged along a first direction (X), and the display panel (100) includes: The substrate (10) has the first direction (X) parallel to the surface of the substrate (10); A pixel definition layer (20) is located on the substrate (10). The pixel definition layer (20) includes a pixel opening (21). The pixel opening (21) includes a first pixel opening (211) located in the first display area (A1) and a second pixel opening (212) located in the second display area (A2). The light-emitting layer (30) includes a first sub-light-emitting layer (31) located in the first pixel opening (211) and a second sub-light-emitting layer (32) located in the second pixel opening (212). The thickness of the first sub-light-emitting layer (31) on the sidewall of the first pixel opening (211) is less than the thickness of the second sub-light-emitting layer (32) on the sidewall of the second pixel opening (212), and the thickness of the light-emitting layer (30) at the bottom of the pixel opening (21) is greater than the thickness on the sidewall of the pixel opening (21). Wherein, the size of the first pixel opening (211) along the first direction (X) is greater than the size of the second pixel opening (212) along the first direction (X).

2. The display panel (100) according to claim 1, characterized in that, The first sub-light-emitting layer (31) includes a first sub-pixel (311), the second sub-light-emitting layer (32) includes a second sub-pixel (321), and the first sub-pixel (311) and the second sub-pixel (321) have the same light-emitting color; The size of the first sub-pixel (311) along the first direction (X) is greater than the size of the second sub-pixel (321) along the first direction (X).

3. The display panel (100) according to claim 1 or 2, characterized in that, The first sub-light-emitting layer (31) includes a first green sub-pixel (G1), and the second sub-light-emitting layer (32) includes a second green sub-pixel (G2). The first green sub-pixel (G1) has a first size along the first direction (X), and the second green sub-pixel (G2) has a second size along the first direction (X), and the first size is larger than the second size.

4. The display panel (100) according to claim 3, characterized in that, The difference between the first dimension and the second dimension is less than 1.5 micrometers.

5. The display panel (100) according to claim 3, characterized in that, The first sub-light-emitting layer (31) further includes a first red sub-pixel (R1) and a first blue sub-pixel (B1), and the second sub-light-emitting layer (32) further includes a second red sub-pixel (R2) and a second blue sub-pixel (B2). The first red sub-pixel (R1) has a third size along the first direction (X), and the second red sub-pixel (R2) has a fourth size along the first direction (X), wherein the third size is larger than the fourth size; The first blue sub-pixel (B1) has a fifth size along the first direction (X), and the second blue sub-pixel (B2) has a sixth size along the first direction (X), wherein the fifth size is larger than the sixth size.

6. The display panel (100) according to claim 5, characterized in that, The difference between the third dimension and the fourth dimension is less than the difference between the first dimension and the second dimension, and the difference between the fifth dimension and the sixth dimension is less than the difference between the first dimension and the second dimension.

7. The display panel (100) according to claim 2, characterized in that, The top view pattern of the first sub-pixel (311) and the second sub-pixel (321) is circular, and the radius of the first sub-pixel (311) is larger than the radius of the second sub-pixel (321).

8. The display panel (100) according to claim 1, characterized in that, Also includes: A filter layer (40) is located on the side of the pixel definition layer (20) away from the substrate (10) layer and is disposed corresponding to the pixel opening (21); The light-shielding layer (50) is located on the side of the pixel definition layer (20) away from the substrate (10) and between adjacent filter layers (40).

9. A method for preparing a display panel (100), characterized in that, include: Provide substrate (10); A pixel definition layer (20) is formed on the substrate (10), the pixel definition layer (20) including a pixel opening (21); A magnetic plate (60) is provided on the side of the substrate (10) away from the pixel definition layer (20), and a mask (70) is provided on the side of the substrate (10) away from the magnetic plate (60). The magnetic plate (60) includes a strong magnetic region (61) and a weak magnetic region (62) alternately arranged along a first direction (X). The distance between the mask (70) and the substrate (10) in the strong magnetic region (61) is smaller than the distance between the weak magnetic region (62) and the substrate (10). The pixel opening (21) includes a first pixel opening (211) located in the strong magnetic region (61) and a second pixel opening (212) located in the weak magnetic region (62). The size of the first pixel opening (211) along the first direction (X) is larger than the size of the second pixel opening (212) along the first direction (X). A light-emitting layer (30) is deposited within the pixel opening (21) by means of the mask (70).

10. A display device (200), characterized in that, Includes the display panel (100) as described in any one of claims 1 to 8.

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