Display module and display device

Abstract

The embodiment of the invention provides a display module and a display device, a display area of the display module comprises a first area and a second area, and the first area is located between the second area and the edge of the display module; the display panel comprises a light-emitting layer and a packaging layer, the light-emitting layer comprises a plurality of light-emitting units, the packaging layer is located on the side, facing the light-emitting surface of the display panel, of the light-emitting layer and comprises a first part located in a first area and a second part located in a second area, and the thickness of the first part is larger than that of the second part; the cover plate is located on one side of the light emitting surface of the display panel and comprises a third part located in the first area and a fourth part located in the second area; the light transmittance of the third portion is greater than the light transmittance of the fourth portion. The display module and the display device provided by the embodiment of the invention are better in brightness uniformity.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module and display device. Background Art

[0002] In the field of display technology, the uniformity of display brightness is an important indicator of a display device's performance and a factor that significantly impacts user experience. However, in existing technologies, there is a significant difference in brightness between the edge and center areas of a display device, especially in narrow-bezel displays, where this problem is even more pronounced. Summary of the Invention

[0003] In view of this, embodiments of this application provide a display module and a display device to solve the above problems.

[0004] In a first aspect, embodiments of this application provide a display module, the display area of ​​the display module including a first region and a second region, the second region being located between the first region and the edge of the display module, and the display module further including:

[0005] The display panel includes:

[0006] The light-emitting layer comprises multiple light-emitting units;

[0007] The encapsulation layer is located on the side of the light-emitting layer facing the light-emitting surface of the display panel; the encapsulation layer includes a first part located in a first region and a second part located in a second region, the thickness of the first part being greater than the thickness of the second part;

[0008] A cover plate, located on the light-emitting side of the display panel, includes:

[0009] Located in the third part of the first area;

[0010] Located in the fourth part of the second area;

[0011] The light transmittance of the third part is greater than that of the fourth part.

[0012] In one implementation of the first aspect, the display module further includes a third region located between the first region and the second region;

[0013] The encapsulation layer includes a fifth portion located in the third region, the thickness of which is greater than the thickness of the first portion and greater than the thickness of the second portion;

[0014] The cover plate includes a sixth section located in the third region, the light transmittance of the sixth section being greater than that of the fourth section.

[0015] In one implementation of the first aspect, the display panel further includes a color resist layer, and the color resist layer includes color resist, the color resist layer being located on the side of the encapsulation layer away from the light-emitting layer;

[0016] Among color resists of the same color, the thickness of the color resist in the second region is less than the thickness of the color resist in the first region.

[0017] In one implementation of the first aspect, the display module further includes a third region located between the first region and the second region;

[0018] In color resists of the same color, the thickness of the color resist in the third region is greater than the thickness of the color resist in the second region.

[0019] The cover plate includes a sixth section located in the third region, the transmittance of the sixth section being greater than or equal to that of the fourth section.

[0020] In one implementation of the first aspect, the width of the second region is 0.5mm-2mm.

[0021] In one implementation of the first aspect, the cover plate includes an anti-reflective film, which includes at least a first anti-reflective portion; the first anti-reflective portion is located in a first region and the second region does not include the anti-reflective film.

[0022] In one implementation of the first aspect, the cover plate includes a light-diffusing film or a light-diffusing film located in the second region.

[0023] In one implementation of the first aspect, the cover plate includes an anti-reflective film, the anti-reflective film including a first anti-reflective portion located in a first region and a second anti-reflective portion located in a second region;

[0024] The reflectivity of the first anti-reflection component is less than that of the second anti-reflection component.

[0025] In one implementation of the first aspect, the reflectivity of the first anti-reflective portion is less than or equal to 1.5%.

[0026] In one implementation of the first aspect, the cover plate includes a substrate, and the anti-reflective film is located on the side of the substrate away from the display panel.

[0027] Secondly, embodiments of this application provide a display device, including the display module as provided in the first aspect.

[0028] In the technical solution provided in this application embodiment, by designing the cover plate with high light transmittance in the third part of the first region and low light transmittance in the fourth part of the second region, a larger proportion of the light from the first region of the display panel with low display brightness will be emitted from the display module after passing through the third part of the cover plate, while a smaller proportion of the light from the second region of the display panel with high display brightness will be emitted from the display module after passing through the fourth part of the cover plate. Ultimately, the amount of light emitted from the first and second regions of the display module is roughly the same, resulting in essentially the same brightness in the first and second regions of the display module. Therefore, the display module and display device provided in this application embodiment have better brightness uniformity. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in 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.

[0030] Figure 1 This is a schematic diagram of a display module related to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the brightness distribution of a display module related to an embodiment of this application;

[0032] Figure 3 for Figure 1 A cross-sectional view along the A1-A2 direction;

[0033] Figure 4 This is a schematic diagram of a display module provided in an embodiment of this application;

[0034] Figure 5 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0035] Figure 6 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0036] Figure 7 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0037] Figure 8 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0038] Figure 9A statistical table showing the light transmittance of the cover plate in the display module under different viewing angles, provided in the embodiments of this application;

[0039] Figure 10 A statistical table showing the brightness of the display module under different viewing angles, provided in the embodiments of this application;

[0040] Figure 11 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0041] Figure 12 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0042] Figure 13 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0043] Figure 14 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0044] Figure 15 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0045] Figure 16 for Figure 4 A schematic cross-sectional view along the B1-B2 direction;

[0046] Figure 17 This is a schematic diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0047] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0048] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0049] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms "a" and "the" as used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0050] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0051] In the description of this specification, it should be understood that the terms "substantially", "approximately", "about", "about", "roughly", "generally" and "generally" used in the claims and embodiments of this application refer to values ​​that can be generally agreed upon within a reasonable range of process operations or tolerances, rather than a precise value.

[0052] It should be understood that although terms such as "first," "second," etc., may be used to describe regions, parts, etc., in the embodiments of this application, these should not be limited to these terms. These terms are only used to distinguish regions, parts, etc., from one another. For example, without departing from the scope of the embodiments of this application, a first region may also be referred to as a second region, and similarly, a second region may also be referred to as a first region. Through meticulous and in-depth research, the applicant of this application has provided a solution to the problems existing in the prior art.

[0053] Figure 1 This is a schematic diagram of a display module related to an embodiment of this application. Figure 2 This is a schematic diagram of the brightness distribution of a display module related to an embodiment of this application. Figure 3 for Figure 1 A cross-sectional view along the A1-A2 direction.

[0054] The inventors of this application selected 15 points in the display module 01 and collected the brightness of these 15 points. The ratio of the brightness of these points to the brightness of the central area of ​​the display module 01 was used as the brightness ratio to evaluate the brightness uniformity of the display module 01. For example, Figure 1 As shown, points 1 to 15 are arranged sequentially from the edge of the display area AA of display module 01 towards the center. Figure 2 It can be seen that the brightness of the light emitted near the second and third points of display module 01 is significantly higher than that of the central area of ​​display area AA, while the brightness of other points far from the edge of display module 01 is not significantly different from that of the central area of ​​display area AA. Based on this issue, the inventors further analyzed the structure of display module 01 and found that the display panel 10 in display module 01 also has the aforementioned problem of uneven brightness. Further analysis revealed that, as... Figure 3As shown, the thickness of the organic film 112 included in the encapsulation layer 11 of the display panel 10 is reduced at the edge, and the portion of this reduced thickness located in the display area AA corresponds exactly to the area from the first point to the fourth point. Therefore, the brightness of the edge area of ​​the display panel 10 is greater than that of the central area of ​​the display panel 10, which is at least related to the fact that the reduced thickness location AA0 of the organic film 112 does not completely avoid the display area AA. When the width of the non-display area NA of the display panel 10 is narrower, the width of the reduced thickness location AA0 of the organic film 112 located in the display area AA is larger, and the problem of uneven brightness is more easily noticed.

[0055] Figure 4 This is a schematic diagram of a display module provided in an embodiment of this application. Figure 5 for Figure 4 A schematic cross-sectional view along the B1-B2 direction.

[0056] To solve the above-mentioned technical problems, this application provides a display module 01, such as... Figure 4 As shown, the display area AA of the display module 01 includes a first area A1 and a second area A2. The second area A2 is located between the first area A1 and the edge of the display module 01, meaning the second area A2 is closer to the edge of the display module 01 than the first area A1. The first area A1 and the second area A2 can be different areas of the display area AA, and the second area A2 can be adjacent to the non-display area NA. This application embodiment differentiates the transmittance of the cover plate 20 included in the display module 01 in the first area A1 and the second area A2 to solve the technical problem. Therefore, it can be understood that, combined with... Figure 4 and Figure 5 The second region A2 includes the portion of the organic film 11a whose thickness is reduced in the display area AA.

[0057] The second region A2 can be a partial display area located between the first region A1 and the upper and lower non-display areas of the display module 01, or it can be a partial display area located between the first region A1 and the left and right non-display areas of the display module 01.

[0058] like Figure 5 As shown, the display module 01 also includes a display panel 10 and a cover plate 20. The cover plate 20 is located on the light-emitting side of the display panel 10 and is used to protect the display panel 10. The cover plate 20 can be attached to the display panel 10 with optical adhesive.

[0059] The display panel 10 includes a light-emitting layer 12 and an encapsulation layer 11. The encapsulation layer 11 is located on the side of the light-emitting layer 12 facing the light-emitting surface of the display panel 10 and is used to encapsulate and protect the light-emitting layer 12. To achieve the encapsulation effect, the encapsulation layer 11 typically includes stacked organic films 11a and inorganic films 11b, for example, such as... Figure 5 As shown, the encapsulation layer 11 includes an inorganic film 11b, an organic film 11a, and an inorganic film 11b stacked sequentially, wherein the organic film 11a can be prepared using an inkjet printing process. The light-emitting layer 12 includes a plurality of light-emitting units 120, which can be organic light-emitting diodes (OLEDs), micro-LEDs, or mini-LEDs, etc. Furthermore, the plurality of light-emitting units 120 may include light-emitting units 120 of different colors, for example, including a red light-emitting unit 120R, a green light-emitting unit 120G, and a blue light-emitting unit 120B, etc. The encapsulation layer 11 includes a first portion 111 located in a first region A1 and a second portion 112 located in a second region A2, wherein the thickness of the first portion 111 is greater than the thickness of the second portion 112. That is, at least a portion of the second portion 112 of the encapsulation layer 11 in the second region A2 is the aforementioned thickness reduction position, for example, as shown in... Figure 5 As shown, the edge of the encapsulation layer 11 has a ramp structure. The height difference of this ramp structure in the display area is H1, where H1 is greater than or equal to 2.5 μm, for example, it can be between 2.5 μm and 6 μm. The thickness of the color resist 130 of the same color in the second region A2 is less than its thickness in the first region A1, and the thickness difference of different color resists 130 of the same color located in the second region A2 can be greater than or equal to 0.4 μm, for example, 0.5 μm.

[0060] The cover plate 20 includes a third portion 211 located in the first region A1 and a fourth portion 212 located in the second region A2. The light transmittance of the third portion 211 is greater than that of the fourth portion 212. When the light transmittance of the third portion 211 is greater than that of the fourth portion 212, a larger proportion of the light emitted by the light-emitting unit 120 in the first region A1 will be emitted from the third portion 211 after passing through the encapsulation layer 11, while a smaller proportion of the light emitted by the light-emitting unit 120 in the second region A2 will be emitted from the fourth portion 212 after passing through the encapsulation layer 11.

[0061] In the technical solution provided in this application embodiment, by designing the cover plate 20 such that the third portion 211 of the first region A1 has high light transmittance and the fourth portion 212 of the second region A2 has low light transmittance, a larger proportion of the light from the first portion 111 of the display panel 10 with low display brightness will be emitted from the display module 01 after passing through the third portion 211 of the cover plate 20, while a smaller proportion of the light from the second portion 112 of the display panel 10 with high display brightness will be emitted from the display module 01 after passing through the fourth portion 212 of the cover plate 20. Ultimately, the amount of light emitted from the first region A1 and the second region A2 of the display module 01 is roughly the same, thus making the brightness of the first region A1 of the display module 01 essentially the same as the brightness of the second region A2. Therefore, the display module 01 provided in this application embodiment has better brightness uniformity.

[0062] In one embodiment of this application, the width of the second region A2 is 0.5mm-4mm. The inventors analyzed the characteristics of the organic film 11a of the encapsulation layer 11 and determined the width occupied by the thinned area at its edge in the display area AA. When the width of the second region A2 is 0.5mm-4mm, and the light transmittance within a 0.5mm-4mm width at the edge of the cover plate 20 is less than the light transmittance of the cover plate 20 in the conventional display area AA of the display panel 10, the brightness difference between the edge area and the middle area of ​​the display module 01 can be significantly reduced.

[0063] Optionally, the width of the second region A2 is 0.5mm-2mm, for example, the width of the second region A2 is 1mm or 1.5mm.

[0064] Figure 6 for Figure 4 A schematic cross-sectional view along the B1-B2 direction.

[0065] In one embodiment of this application, such as Figure 6As shown, the display panel 10 also includes a color resist layer 13, which is located on the side of the encapsulation layer 11 away from the light-emitting layer 12. In some embodiments, when fabricating the color resist layer 13, the surface of the encapsulation layer 11 away from the light-emitting layer 12 can be used as its bearing surface, i.e., the color resist layer 13 is in contact with the encapsulation layer 11. In some embodiments, a touch layer may also be included between the color resist layer and the encapsulation layer, and a planarization layer may be included between the touch layer and the color resist layer, which can serve as the bearing surface of the color resist layer 13. The color resist layer 13 includes a plurality of color resists 130 of different colors, and color resists 130 of the same color and light-emitting units 120 can overlap in a direction perpendicular to the plane of the display panel 10. The light emitted by the light-emitting unit 120 is emitted after passing through the color resist 130 and is light with purer color. For example, the multiple color resistors 130 include a red color resistor 130R, a green color resistor 130G, and a blue color resistor 130B. The red color resistor 130R overlaps with the red light-emitting unit 120R, the green color resistor 130G overlaps with the green light-emitting unit 120G, and the blue color resistor 130B overlaps with the blue light-emitting unit 120B. Figure 6 As shown, in addition, the color filter 130 can only allow light of the corresponding color to pass through, which can filter out most of the light incident on the display panel 10 from the light-emitting surface of the display module 01, thereby reducing the reflection of ambient light by the display panel 10 and improving the resolution of the display module 01.

[0066] Among them, such as Figure 6As shown, among the color resists 130 of the same color, the thickness of the color resist 130 in the second region A2 is less than the thickness of the color resist 130 in the first region A1. For example, the thickness of the red color resist 130R in the second region A2 is less than the thickness of the red color resist 130R in the first region, the thickness of the green color resist 130G in the second region A2 is less than the thickness of the green color resist 130G in the first region, and the thickness of the blue color resist 130B in the second region A2 is less than the thickness of the blue color resist 130B in the first region. The color resist 130 is usually an organic material and has a certain degree of fluidity before curing. Before curing, the color resist 130 overflows away from the encapsulation layer 11 at the edge of the encapsulation layer 11 due to the thinning of the encapsulation layer 11, and the color resist 130 shows a linear slope-like effect at the thinning position of the encapsulation layer 11. Therefore, the thickness of the color resist 130 in the second region A2 will be thinner, resulting in the thickness of the color resist 130 in the second region A2 being less than the thickness of the color resist 130 of the same color in the first region A1. Although the color resist 130 allows light of the same color to pass through, it also absorbs light to some extent. Since the thickness of the color resist 130 in the first region A1 is greater than that of the same color color resist 130 in the second region A2, the color resist 130 in the first region A1 has a higher light absorption rate, resulting in lower luminous brightness in the first region A1 compared to the second region A2. Furthermore, the cover plate 20 has a higher light transmittance in the first region A1 than in the second region A2, thus effectively balancing the luminous brightness of the first region A1 and the second region A2 of the display module 01.

[0067] Figure 7 for Figure 4 A schematic cross-sectional view along the B1-B2 direction. Figure 8 for Figure 4 A schematic cross-sectional view along the B1-B2 direction.

[0068] In this application, as Figure 7 and Figure 8 As shown, the cover plate 20 may include an anti-reflective film 201, which reduces the light reflectivity of the cover plate 20 and increases its light transmittance. The differentiated design of the anti-reflective film 201 within the cover plate 20 results in differences in light transmittance between at least two different regions of the cover plate 20. Furthermore, the anti-reflective film 201 can enhance the brightness at its location.

[0069] like Figure 7 and Figure 8As shown, the cover plate 20 may also include a substrate 200, such as a glass substrate. An anti-reflective film 201 may be disposed on one side of the substrate 200. The anti-reflective film 201 may be disposed on the substrate 200 by means of bonding such as optical adhesive, or by means of thin film deposition such as vapor deposition.

[0070] In one embodiment of this application, such as Figure 7 As shown, the anti-reflective film 201 can be located on the side of the substrate 200 away from the display panel 10. When the anti-reflective film 201 is located on the side of the substrate 200 away from the display panel 10, the anti-reflective film 201 can be a film layer in the display module 01 that can contact air. Since the refractive index of air is low and usually 1, it is easier to increase the anti-reflective efficiency of the cover plate 20 by making the anti-reflective film 201 have a large refractive index difference with air.

[0071] Among them, the anti-reflective film can be a single film layer; or it can be a composite film layer formed by stacking multiple sub-film layers with different refractive indices.

[0072] In one embodiment of this application, such as Figure 8 As shown, the anti-reflective film 201 can be located on the side of the substrate 200 closer to the display panel 10. After the cover plate 20 is attached to the display panel 10, the anti-reflective film 201 is located between the substrate 200 and the display panel 10, thus providing better protection for the anti-reflective film 201.

[0073] In one embodiment of this application, such as Figure 7 and Figure 8 As shown, the anti-reflective film 201 includes at least a first anti-reflective portion 2011, which is at least a partial area of ​​the anti-reflective film 201. The first anti-reflective portion 2011 is located in a first region A1, and the second region A2 does not include the anti-reflective film 201. That is, the first region A1 of the cover plate 20 has higher light transmittance due to the presence of the anti-reflective film 201, while the second region A2 of the cover plate 20 has lower light transmittance relative to the first region A1 due to the absence of the anti-reflective film 201.

[0074] The reflectivity of the first anti-reflective portion 2011 is less than or equal to 1.5%. For example, the reflectivity of the first anti-reflective film 201 can be 0.5%, 1.2%, or 1.4%.

[0075] Figure 9 This is a statistical table showing the light transmittance of the cover plate in the display module under different viewing angles, provided in the embodiments of this application. Figure 10 A statistical table showing the brightness of the display module under different viewing angles, provided in the embodiments of this application.

[0076] in, Figure 9 The recorded light transmittance is the light transmittance of the first area A1 of the cover plate 20 to the white image displayed on the display panel 10. Figure 10 The recorded brightness is the brightness of the first area A1 of the display module 01 when displaying a white screen on the display panel 10. Figure 9 The anti-reflective film 201 included in the corresponding cover plate 20 has a reflectivity of 1.5%. Figure 10 The anti-reflective film 201 included in the corresponding cover plate 20 has a reflectivity of 0.5%.

[0077] like Figure 9 As shown, when the reflectivity of the anti-reflective film 201 included in the cover plate 20 of the display module 01 is 1.5%, the light transmittance of the cover plate 20 is 98.3%, 98.3%, 98.1%, 97.4%, and 93.9% at viewing angles of 0°, 15°, 30°, 45°, and 60°, respectively. Compared with the cover plate 20 without the anti-reflective film 201, the light transmittance at different viewing angles is increased by 2.5%, 2.5%, 2.5%, 2.7%, and 3.3%, respectively.

[0078] like Figure 10 As shown, when the reflectivity of the anti-reflective film 201 included in the cover plate 20 of the display module 01 is 0.5%, the brightness of the display module 01 is 845.2 nit, 815.2 nit, 647.8 nit, 367.4 nit, and 185.8 nit at viewing angles of 0°, 15°, 30°, 45°, and 60°, respectively. Compared with the display module 01 without the anti-reflective film 201 attached to the cover plate 20, the brightness at different viewing angles is increased by 5.81%, 5.84%, 5.75%, 6.15%, and 7.77%, respectively.

[0079] The following embodiments are based on the example where the anti-reflective film 201 is located on the side of the substrate 200 away from the display panel 10. However, unless otherwise specified or contradictory, the following embodiments are also applicable to the case where the anti-reflective film 201 is located between the display panel 10 and the substrate 200.

[0080] Figure 11 for Figure 4 A schematic cross-sectional view along the B1-B2 direction.

[0081] In one embodiment of this application, such as Figure 11As shown, the reflective film includes a first anti-reflective portion 2011 located in the first region A1 and a second anti-reflective portion 2012 located in the second region A2. The reflectivity of the first anti-reflective portion 2011 is less than that of the second anti-reflective portion 2012. That is, the first region A1 of the cover plate 20 has high light transmittance due to the anti-reflective film 201 with lower reflectivity, while the second region A2 of the cover plate 20 has low light transmittance due to the anti-reflective film 201 with higher reflectivity. Furthermore, since the cover plate 20 has anti-reflective films 201 in both the first region A1 and the second region A2, the overall light transmittance of the cover plate 20 is high. Therefore, the arrangement of the anti-reflective film 201 in this embodiment not only enables the cover plate 20 to improve the brightness uniformity of the display module 01 but also enhances the brightness of the display module 01.

[0082] The reflectivity of the first anti-reflective component 2011 is less than or equal to 1.5%.

[0083] Figure 12 for Figure 4 A schematic cross-sectional view along the B1-B2 direction. Figure 13 for Figure 4 A schematic cross-sectional view along the B1-B2 direction.

[0084] Depend on Figure 3 It can be seen that because the thickness of the organic film 11a in the encapsulation layer 11 included in the second region A2 is uneven in the second region A2, the brightness emission of the second region A2 of the display panel 10 is also uneven, resulting in uneven brightness emission of the second region A2 of the display module 01. To further improve this problem, such as... Figure 11 and Figure 12 As shown, the cover plate 20 provided in this embodiment of the application also includes a light-diffusing film or a light-diffusing film 202, which is located in the second region A2. The light-diffusing film or the light-diffusing film 202 can modulate the light with uneven brightness in the second region A2 of the display panel 10 into light with uniform brightness. Since the second region A2 is close to the edge of the display module 01, the light-diffusing film and the light-diffusing film 202 will not have a significant impact on the overall resolution of the display module 01.

[0085] like Figure 12 As shown, when the cover plate 20 of the second region A2 is not provided with an anti-reflective film 201, the light-diffusing film or diffusion film 202 can be in the same layer as the anti-reflective film 201.

[0086] like Figure 13As shown, when an anti-reflective film 201 is provided in the cover plate 20 of the second region A2, a light-diffusing film or a light-diffusing film 202 can be stacked with the anti-reflective film 201 in the second region A2. Optionally, the number of multiple film layers included in the first anti-reflective portion 2011 in the first region A1 can be different from the number of multiple film layers included in the second anti-reflective portion 2012 in the second region A2. For example, if the number of multiple film layers included in the first anti-reflective portion 2011 is greater than the number of multiple film layers included in the second anti-reflective portion 2012, then the height of the second anti-reflective portion 2012 after stacking with the light-diffusing film or the light-diffusing film 202 can be the same as the thickness of the first anti-reflective portion 2011.

[0087] Figure 14 for Figure 4 A schematic cross-sectional view along the B1-B2 direction.

[0088] In one embodiment of this application, such as Figure 14 As shown, display module 01 also includes a third region A3, which is located between the first region A1 and the second region A2. Figure 14 As shown, the encapsulation layer 11 includes a fifth portion 113 located in the third region A3, the thickness of the fifth portion 113 being greater than the thickness of the first portion 111 and greater than the thickness of the second portion 112. For example, as... Figure 4 As shown, the organic film 11a in the encapsulation layer 11 has a raised structure before transitioning from the flat area to the slope structure. It is evident that the fifth portion 113 of the encapsulation layer 11, including this raised structure, has a significantly greater thickness than the first portion 111 and the second portion 112 of the encapsulation layer 11. The height of this raised structure can be H2, where H2 ≤ 0.4 μm, meaning the difference between the height of the organic film 11a in the third region A3 and its height in the first region A1 is less than or equal to 0.4 μm. Therefore, the transmittance of the fifth portion 113 is less than that of the second portion 112, resulting in a lower luminous intensity in the third region A3 of the display panel 10 compared to the second region A2.

[0089] In this embodiment, the cover plate 20 includes a sixth portion 213 located in the third region A3, and the light transmittance of the sixth portion 213 is greater than that of the fourth portion 212. By designing the cover plate 20 such that the sixth portion 213 located in the third region A3 has high light transmittance and the fourth portion 212 located in the second region A2 has low light transmittance, a larger proportion of the light from the fifth portion 113 (which has low display brightness) in the display panel 10 will be emitted from the display module 01 after passing through the sixth portion 213 of the cover plate 20, while a smaller proportion of the light from the second portion 112 (which has high display brightness) in the display panel 10 will be emitted from the display module 01 after passing through the fourth portion 212 of the cover plate 20. Ultimately, the amount of light emitted from the third region A3 and the second region A2 of the display module 01 is approximately the same, thus making the brightness of the third region A3 of the display module 01 essentially the same as that of the second region A2. Therefore, the display panel 10 provided in this embodiment has good brightness uniformity.

[0090] Figure 15 for Figure 4 A schematic cross-sectional view along the B1-B2 direction.

[0091] When the display panel 10 further includes a color resist layer 13, the color resist layer 13 is located on the side of the encapsulation layer 11 away from the light-emitting layer 12, and the color resist layer 13 includes color resist 130. Among the color resist 130s of the same color, the thickness of the color resist 130 in the second region A2 is less than the thickness of the color resist 130 in the first region A1, and the thickness of the color resist 130 in the third region A3 is greater than the thickness of the color resist 130 in the second region A2. In this embodiment, although the thickness of the color resist 130 in the third region A3 is greater than the thickness of the color resist 130 in the second region A2, the luminous brightness of the third region A3 of the display panel 10 is less than the luminous brightness of the second region A2 of the display panel 10, while the light transmittance of the cover plate 20 in the third region A3 is greater than its light transmittance in the second region A2. Therefore, the luminous brightness of the third region A3 and the second region A2 of the display module 01 can be effectively balanced.

[0092] Furthermore, because the surface of the encapsulation layer 11 of the color resist 130 in the third region A3 exhibits a slope-like phenomenon, the thickness of the color resist 130 in the third region A3 can be less than the thickness of the same color color resist 130 in the first region A1. Therefore, the light absorption of the color resist 130 in the third region A3 is less than that of the same color color resist 130 in the first region A1. Conversely, the thickness of the encapsulation layer 11 in the third region A3 can be greater than its thickness in the first region A1. Therefore, the light absorption of the encapsulation layer 11 in the third region A3 is greater than that in the first region A1. In summary, since the luminous brightness of the display panel 10 is not significantly different between the first region A1 and the third region A3, the light transmittance of the cover plate 20 in the third region A3 can be the same as that in the first region A1. Therefore, the cover plate 20 does not need to be designed differently in the third region A3 and the first region A1, thereby reducing manufacturing difficulty and cost.

[0093] In one embodiment of this application, the width of the third region A3 is less than or equal to 1 mm, for example, the width of the third region A3 is 0.5 mm.

[0094] During the fabrication of the color resist 130, the color resist closer to the edge of the display panel 10 tends to flow towards the second region. When the width of the third region A3 is relatively wide (e.g., 1 mm) or the height of the protrusion on the fifth portion 113 is relatively large (e.g., 0.4 μm), the protrusion hinders the flow of the color resist towards the second region A2, resulting in color resist accumulation on the side of the protrusion closer to the first display area. In other words, the color resist 130 experiences increased thickness at the edge of the first region A1 near the second region A2. In this case, the light transmittance of the cover plate at the corresponding location can be set to be less than the partial light transmittance of the cover plate 20 within the first region A1.

[0095] Figure 16 for Figure 4 A schematic cross-sectional view along the B1-B2 direction.

[0096] When the cover plate 20 includes an anti-reflective film 201, the anti-reflective film 201 may further include a third anti-reflective portion 2013, which is located in the third region A3. The reflectivity of the third anti-reflective portion 2013 may be the same as that of the first anti-reflective portion 2011, so the first anti-reflective portion 2011 and the third anti-reflective portion 2013 can be prepared simultaneously.

[0097] In addition, the cover plate 20 may also include a light-diffusing film or diffusion film 202 located in the second region A2, and / or a second anti-reflection portion 2012 located in the second region A2.

[0098] Figure 17 This is a schematic diagram of a display device provided in an embodiment of this application.

[0099] like Figure 17 As shown, this application embodiment also provides a display device 001, including the display module 01 provided in any of the above embodiments. Of course, Figure 12 The display device 001 shown is merely illustrative; it can be any electronic device with display functionality, such as a mobile phone, tablet computer, laptop computer, e-reader, television set, or video wall display device. The display device 001 provided in this application embodiment exhibits excellent uniformity of display brightness.

[0100] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display module, characterized in that, The display module's display area includes a first area and a second area, the second area being located between the first area and the edge of the display module. The display module further includes: The display panel includes: A light-emitting layer, wherein the light-emitting layer comprises a plurality of light-emitting units; An encapsulation layer is located on the side of the light-emitting layer facing the light-emitting surface of the display panel; the encapsulation layer includes a first portion located in the first region and a second portion located in the second region, wherein the thickness of the first portion is greater than the thickness of the second portion; A cover plate, located on one side of the light-emitting surface of the display panel, the cover plate comprising: The third part located in the first region; The fourth part located in the second region; The light transmittance of the third part is greater than that of the fourth part.

2. The display module according to claim 1, characterized in that, The display module further includes a third region, which is located between the first region and the second region; The encapsulation layer includes a fifth portion located in the third region, the thickness of the fifth portion being greater than the thickness of the first portion and greater than the thickness of the second portion; The cover plate includes a sixth portion located in the third region, the light transmittance of the sixth portion being greater than that of the fourth portion.

3. The display module according to claim 1 or 2, characterized in that, The display panel further includes a color resist layer, and the color resist layer includes color resist, the color resist layer being located on the side of the encapsulation layer away from the light-emitting layer; Among the color resists of the same color, the thickness of the color resist in the second region is less than the thickness of the color resist in the first region.

4. The display module according to claim 3, characterized in that, The display module further includes a third region, which is located between the first region and the second region; Among color resists of the same color, the thickness of the color resist in the third region is greater than the thickness of the color resist in the second region; The cover plate includes a sixth portion located in the third region, the transmittance of the sixth portion being greater than or equal to the transmittance of the fourth portion.

5. The display module according to claim 1, characterized in that, The width of the second region is 0.5mm-2mm.

6. The display module according to claim 1, characterized in that, The cover plate includes an anti-reflective film, which includes at least a first anti-reflective portion; the first anti-reflective portion is located in a first region and the second region does not include the anti-reflective film.

7. The display module according to claim 6, characterized in that, The cover plate includes a light-diffusing film or a light-diffusing film, which is located in the second region.

8. The display module according to claim 1, characterized in that, The cover plate includes an anti-reflective film, which includes a first anti-reflective portion located in the first region and a second anti-reflective portion located in the second region; The reflectivity of the first anti-reflection portion is less than that of the second anti-reflection portion.

9. The display module according to claim 6 or 8, characterized in that, The reflectivity of the first anti-reflective component is less than or equal to 1.5%.

10. The display module according to claim 6 or 8, characterized in that, The cover plate includes a substrate, and the anti-reflective film is located on the side of the substrate away from the display panel.

11. A display device, characterized in that, Includes the display module as described in any one of claims 1-10.

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