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 substrate and a pixel defining layer located on one side of the substrate, and a first opening is formed in the pixel defining layer; a light emitting device in the first opening; the packaging layer is located on one side, deviating from the substrate, of the pixel defining layer and the light-emitting device and is used for packaging the light-emitting device; the supporting layer and the black matrix are sequentially stacked on the side, away from the substrate, of the packaging layer, a third opening and a fourth opening are formed in the black matrix, the orthographic projection of the third opening on the substrate covers the orthographic projection of the first opening on the substrate, and the orthographic projection of the fourth opening on the substrate is not overlapped with the orthographic projection of the third opening on the substrate; the supporting layer is located in the fourth opening and makes contact with the peripheral side wall of the fourth opening. According to the display panel, the actual size of the fourth opening in the black matrix cannot be increased, and therefore it is guaranteed that the fourth opening area of the black matrix is not easily recognized by human eyes.

Description

Technical Field

[0001] This disclosure pertains to the field of display technology, specifically relating to a display panel, its manufacturing method, and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays have attracted widespread attention due to their advantages such as self-illumination, low power consumption, thinness, flexibility, vibrant colors, high contrast, and fast response speed. Summary of the Invention

[0003] In a first aspect, embodiments of this disclosure provide a display panel, which includes a substrate.

[0004] A pixel defining layer is located on one side of the substrate, and a first opening is formed in the pixel defining layer;

[0005] The light-emitting device is located in the first opening;

[0006] An encapsulation layer, located on the side of the pixel defining layer and the light-emitting device facing away from the substrate, is used to encapsulate the light-emitting device;

[0007] A support layer and a black matrix are stacked sequentially on the side of the encapsulation layer opposite to the substrate.

[0008] The black matrix has a third opening and a fourth opening. The orthographic projection of the third opening on the substrate covers the orthographic projection of the first opening on the substrate. The orthographic projections of the fourth opening and the third opening on the substrate do not overlap.

[0009] The support layer is located in the fourth opening, and the support layer is in contact with the surrounding sidewalls of the fourth opening.

[0010] In some embodiments, the cross-sectional shape of the support layer perpendicular to the substrate includes a trapezoid.

[0011] The base angle of the trapezoid ranges from 30° to 50°.

[0012] In some embodiments, the thickness of the support layer is greater than or equal to the thickness of the black matrix, and the four sidewalls of the fourth opening are in contact with the edge sidewalls of the support layer;

[0013] Alternatively, the thickness of the support layer is less than the thickness of the black matrix, and the four sidewalls of the fourth opening are in contact with the edge sidewalls of the support layer and the surface away from the substrate.

[0014] In some embodiments, a fifth opening is provided in the support layer.

[0015] The orthographic projection of the fifth opening on the substrate is located within the orthographic projection of the fourth opening on the substrate.

[0016] In some embodiments, a first light-transmitting layer is further included, located between the encapsulation layer and the support layer, wherein the orthographic projection of the first light-transmitting layer on the substrate at least covers the orthographic projection of the fourth opening on the substrate;

[0017] The support layer and the first light-transmitting layer are an integral structure.

[0018] In some embodiments, a first light-transmitting layer is further included, located between the encapsulation layer and the support layer, wherein the orthographic projection of the first light-transmitting layer on the substrate at least covers the orthographic projection of the fourth opening on the substrate;

[0019] A sixth opening is provided in the first light-transmitting layer.

[0020] The orthographic projection of the sixth opening on the substrate covers the orthographic projection of the first opening on the substrate, and the orthographic projection of the sixth opening on the substrate is located within the orthographic projection of the third opening on the substrate;

[0021] The display panel also includes a color resist layer located in the sixth opening.

[0022] The color resist layer extends between the first light-transmitting layer and the black matrix, and extends into the fourth opening, wherein the portion of the color resist layer located in the fourth opening is reused as the support layer.

[0023] In some embodiments, a fifth opening is provided in the support layer, and the orthographic projection of the fifth opening on the substrate is located within the orthographic projection of the fourth opening on the substrate.

[0024] The color resist layer has a seventh opening in the portion other than the fourth opening, and the orthographic projection of the seventh opening on the substrate is located within the orthographic projection of the fifth opening on the substrate.

[0025] In some embodiments, a first light-transmitting layer is further included, located between the encapsulation layer and the support layer, wherein the orthographic projection of the first light-transmitting layer on the substrate at least covers the orthographic projection of the fourth opening on the substrate;

[0026] A sixth opening is provided in the first light-transmitting layer.

[0027] The orthographic projection of the sixth opening on the substrate covers the orthographic projection of the first opening on the substrate, and the orthographic projection of the sixth opening on the substrate is located within the orthographic projection of the third opening on the substrate;

[0028] The display panel also includes a color resist layer located in the sixth opening and extending between the first light-transmitting layer and the support layer.

[0029] The color resist layer has a seventh opening, and the orthographic projection of the seventh opening on the substrate is located within the orthographic projection of the fourth opening on the substrate;

[0030] The display panel further includes a second light-transmitting layer located in the seventh opening, and the second light-transmitting layer is in contact with the surrounding sidewalls of the seventh opening;

[0031] The second light-transmitting layer and the supporting layer are an integral structure.

[0032] In some embodiments, a fifth opening is provided in the support layer, and the orthographic projection of the fifth opening on the substrate is located within the orthographic projection of the fourth opening on the substrate.

[0033] The second light-transmitting layer has an eighth opening, and the orthographic projection of the eighth opening on the substrate is located within the orthographic projection of the fifth opening on the substrate.

[0034] In some embodiments, the opening size of the fifth opening is less than or equal to the opening size of the fourth opening.

[0035] In some embodiments, the pixel defining layer is further provided with a second opening, wherein the orthographic projections of the second opening and the first opening on the substrate do not overlap;

[0036] The orthographic projection of the fourth opening on the substrate is located within the orthographic projection of the second opening on the substrate;

[0037] The opening size of the fourth opening is less than or equal to the opening size of the second opening.

[0038] In some embodiments, the distance between the orthographic projections of the fourth opening and the second opening on the substrate ranges from 0.5 to 2 μm.

[0039] The distance between the orthographic projections of the fourth opening and the fifth opening on the substrate ranges from 1 to 3 μm.

[0040] The opening size of the fourth opening ranges from 5 to 15 μm.

[0041] The thickness of the support layer ranges from 1 to 2 μm.

[0042] In some embodiments, the opening size of the sixth opening is greater than or equal to the opening size of the first opening.

[0043] The distance between the orthographic projections of the sixth opening and the first opening on the substrate is in the range of 0 to 3 μm.

[0044] The thickness of the first light-transmitting layer ranges from 1.5 to 2.5 μm;

[0045] The refractive index of the first light-transmitting layer ranges from 1.45 to 1.5;

[0046] The cross-sectional shape of the first light-transmitting layer perpendicular to the substrate includes a trapezoid, and the angle of the base angle of the trapezoid ranges from 45° to 85°.

[0047] In some embodiments, the opening size of the third opening is larger than the opening size of the first opening.

[0048] The distance between the orthographic projections of the third opening and the first opening on the substrate ranges from 3 to 6 μm.

[0049] The thickness of the black matrix ranges from 1 to 2 μm.

[0050] In some embodiments, the refractive index of the color resist layer ranges from 1.65 to 1.75.

[0051] The thickness of the color resist layer located in the sixth opening ranges from 2 to 4 μm.

[0052] In some embodiments, a first light-transmitting layer is further included, located between the encapsulation layer and the support layer, wherein the orthographic projection of the first light-transmitting layer on the substrate at least covers the orthographic projection of the fourth opening on the substrate;

[0053] A sixth opening is provided in the first light-transmitting layer.

[0054] The orthographic projection of the sixth opening on the substrate covers the orthographic projection of the first opening on the substrate, and the orthographic projection of the sixth opening on the substrate is located within the orthographic projection of the third opening on the substrate;

[0055] The display panel also includes a color resist layer located in the sixth opening.

[0056] The color resist layer also extends to the side of the black matrix opposite to the substrate, and the width of the overlapping area of ​​the orthographic projection of the color resist layer and the side of the first light-transmitting layer opposite to the substrate on the substrate ranges from 0 to 6 μm.

[0057] In some embodiments, the number of the first opening is multiple, and the number of the second opening is multiple.

[0058] The orthographic projection of the second opening on the substrate is located in the interval region between the orthographic projections of two adjacent first openings on the substrate;

[0059] The substrate includes a photosensitive device, with the photosensitive surface of the photosensitive device facing the side where the light-emitting device is located.

[0060] The orthographic projection of the plurality of second openings on the substrate lies within the photosensitive surface of the photosensitive device.

[0061] Secondly, embodiments of this disclosure provide a display device, which includes the aforementioned display panel.

[0062] Thirdly, embodiments of this disclosure provide a method for manufacturing a display panel, including the preparation of a substrate;

[0063] A pixel defining layer, a light-emitting device, an encapsulation layer, a support layer, and a black matrix are sequentially fabricated on one side of the substrate.

[0064] The pixel defining layer has a first opening;

[0065] The light-emitting device is located in the first opening;

[0066] The black matrix has a third opening and a fourth opening. The orthographic projection of the third opening on the substrate covers the orthographic projection of the first opening on the substrate. The orthographic projections of the fourth opening and the third opening on the substrate do not overlap.

[0067] The support layer is located in the fourth opening, and the support layer is in contact with the surrounding sidewalls of the fourth opening.

[0068] In some embodiments, after the encapsulation layer is prepared and before the support layer is prepared, a first light-transmitting layer is further prepared; the orthographic projection of the first light-transmitting layer on the substrate at least covers the orthographic projection of the fourth opening on the substrate.

[0069] After the black matrix is ​​prepared, the process also includes preparing a color resist layer.

[0070] Alternatively, after the first light-transmitting layer is prepared and before the black matrix is ​​prepared, a color resist layer is also prepared; the color resist layer extends into the fourth opening, and the portion of the color resist layer located in the fourth opening is reused as the support layer;

[0071] Alternatively, after the first light-transmitting layer is prepared and before the support layer is prepared, a color resist layer is also prepared; the color resist layer extends between the first light-transmitting layer and the support layer.

[0072] The display panel provided in this embodiment of the present disclosure, by placing the support layer in the fourth opening and having the support layer in contact with the four sidewalls of the fourth opening, can support the four sidewalls of the fourth opening, thereby making it less likely that the four sidewalls of the fourth opening in the black matrix will be broken by water during the rinsing process after development. This can improve or avoid the actual opening size of the fourth opening from increasing relative to the design value, and ultimately improve or avoid the increase in the reflectivity difference between the fourth opening area and other non-opening areas of the black matrix, ensuring that the fourth opening is not easily recognized by the human eye and improving the appearance of the display panel.

[0073] The display device provided in this embodiment of the present disclosure, by employing the above-described display panel, can ensure that the display side of the display device is not easily recognized by the human eye in the area corresponding to the photosensitive device, thereby improving the appearance of the display device. Attached Figure Description

[0074] The accompanying drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

[0075] Figure 1a This is a cross-sectional schematic diagram of a display panel in the related art.

[0076] Figure 1b For preparation Figure 1a A schematic diagram of the process of displaying the black matrix in the display panel.

[0077] Figure 1c This is a schematic diagram showing that the actual opening size of the light-transmitting opening in the black matrix of the related technology is increased relative to the design value.

[0078] Figure 2a This is a partial cross-sectional schematic diagram of a display panel according to an embodiment of the present disclosure.

[0079] Figure 2b for Figure 2a An enlarged schematic diagram of part C.

[0080] Figure 2c for Figure 2a Another enlarged schematic diagram of part C.

[0081] Figure 2d This is a three-dimensional schematic diagram of the pixel defining layer, the first light-transmitting layer, the support layer and the black matrix stacked in an embodiment of this disclosure.

[0082] Figure 2e This is a three-dimensional schematic diagram of the pixel defining layer, the first light-transmitting layer, the support layer, and the black matrix in an embodiment of this disclosure.

[0083] Figure 3a This is a partial cross-sectional schematic diagram of another display panel in an embodiment of this disclosure.

[0084] Figure 3b for Figure 3a An enlarged schematic diagram of part D in the middle.

[0085] Figure 4a This is a partial cross-sectional schematic diagram of another display panel in an embodiment of this disclosure.

[0086] Figure 4b for Figure 4a An enlarged schematic diagram of part E in the middle.

[0087] Figure 5a This is a partial cross-sectional schematic diagram of another display panel in an embodiment of this disclosure.

[0088] Figure 5b for Figure 5a An enlarged schematic diagram of section F in the middle.

[0089] Figure 6a This is a partial cross-sectional schematic diagram of another display panel in an embodiment of this disclosure.

[0090] Figure 6b for Figure 6a An enlarged schematic diagram of section G in the middle.

[0091] Figure 7a This is a partial cross-sectional schematic diagram of another display panel in an embodiment of this disclosure.

[0092] Figure 7b for Figure 7a An enlarged schematic diagram of part H in the middle.

[0093] Figure 8a This is a partial cross-sectional schematic diagram of another display panel in an embodiment of this disclosure.

[0094] Figure 8b for Figure 8a An enlarged schematic diagram of part I in the middle.

[0095] Figure 9a This is a partial cross-sectional schematic diagram of another display panel in an embodiment of this disclosure.

[0096] Figure 9b for Figure 9a An enlarged schematic diagram of part J in the middle. Detailed Implementation

[0097] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the following describes in further detail a display panel, its preparation method, and a display device provided in the embodiments of this disclosure, in conjunction with the accompanying drawings and specific implementation details.

[0098] Embodiments of this disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms and should not be construed as limited to the embodiments set forth in this disclosure. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0099] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas, but are not intended to be limiting.

[0100] In related technologies, refer to Figure 1a The display panel includes a display substrate 12, with a touch layer 10, a protective layer 13, and a color filter layer 14 sequentially stacked on the display side of the display substrate 12. The display substrate 12 includes light-emitting devices 3 and photosensitive devices (not shown), with the photosensitive devices located in the spaced areas between adjacent light-emitting devices 3. The light-emitting devices 3 emit light to realize the display function of the display panel; the photosensitive devices sense ambient light incident from the display side of the display panel and adjust the display brightness of the display panel according to the intensity of the ambient light to provide the user with a better visual experience. The color filter layer 14 includes a color resist 141 and a black matrix 6; the protective layer 13 is used to protect the touch layer 10; the protective layer 13 has multiple light-emitting openings, with the color resist 141 located at least in one of the light-emitting openings, and the black matrix 6 located in the spaced areas between adjacent light-emitting openings. The positions of the light-emitting devices 3 and the color resist 141 correspond, and the light emitted by the light-emitting devices 3 passes through the color resist 141 before exiting, thereby improving the reflection of ambient light in the corresponding light-emitting opening areas of the display panel. The black matrix 6 has a light-transmitting opening 63, which corresponds to the position of the photosensitive device. Ambient light can shine through the light-transmitting opening 63 onto the photosensitive surface of the photosensitive device, thereby enabling the photosensitive device to sense ambient light.

[0101] Reference Figure 1bThe black matrix 6 uses a negative photoresist material. The preparation process of the black matrix 6 includes coating to form a black matrix film 15 → soft baking → exposure → development → rinsing → curing. During the preparation of the black matrix 6, after exposure and development, the coated black matrix film 15 forms the middle pattern 16 of the black matrix with an inverted trapezoidal cross-section. In order to improve the problem of black matrix material residue in the light-emitting opening of the protective layer 13, high-pressure rinsing with water is required before curing. Since the slope side of the inverted trapezoidal cross-section structure of the black matrix middle pattern 16 lacks support, it is easily broken by high-pressure water. Finally, after the curing process, the actual opening size of the light-transmitting opening 63 in the black matrix 6 is larger than the design value.

[0102] Reference Figure 1c When the actual opening size d' of the light-transmitting opening 63 in the black matrix 6 increases relative to the design value d, the reflectivity of the light-transmitting opening 63 area (such as the reflection of ambient light by the cathode of the light-emitting device) increases, and the difference in reflectivity between it and other non-light-transmitting opening areas increases. This makes the light-transmitting opening 63 in the black matrix 6 easily recognizable by the human eye, affecting the appearance of the display panel.

[0103] To address the aforementioned problems in the related art, in a first aspect, embodiments of this disclosure provide a display panel, referring to... Figure 2a , Figure 2b , Figure 2c , Figure 2d and Figure 2e as well as Figure 3a and Figure 3b , Figure 4a and Figure 4b , Figure 5a and Figure 5b The system includes a substrate 1, a pixel defining layer 2 located on one side of the substrate 1, with a first opening 21 in the pixel defining layer 2; a light-emitting device 3 located in the first opening 21; an encapsulation layer 4 located on the side of the pixel defining layer 2 and the light-emitting device 3 away from the substrate 1, used to encapsulate the light-emitting device 3; a support layer 5 and a black matrix 6, which are stacked sequentially on the side of the encapsulation layer 4 away from the substrate 1, with a third opening 61 and a fourth opening 62 in the black matrix 6, the orthographic projection of the third opening 61 on the substrate 1 covering the orthographic projection of the first opening 21 on the substrate 1, and the orthographic projections of the fourth opening 62 and the third opening 61 on the substrate 1 not overlapping; the support layer 5 located in the fourth opening 62, and the support layer 5 in contact with the four sides of the fourth opening 62.

[0104] The support layer 5 is made of a light-transmitting material, such as a light-transmitting resin. The light-emitting device 3 can be an OLED light-emitting device. The substrate 1 includes a photosensitive device (not shown in the figure), with the photosensitive surface of the photosensitive device facing the side where the light-emitting device 3 is located. The fourth opening 62 corresponds to the position of the photosensitive surface of the photosensitive device, that is, ambient light can be irradiated onto the photosensitive surface of the photosensitive device through the fourth opening 62 opened in the black matrix 6, thereby realizing the sensing of ambient light by the photosensitive device.

[0105] In this embodiment, by placing the support layer 5 in the fourth opening 62 and having the support layer 5 in contact with the surrounding sidewalls of the fourth opening 62, the support layer 5 can provide support for the surrounding sidewalls of the fourth opening 62. This makes it less likely that the surrounding sidewalls of the fourth opening 62 in the black matrix 6 will be broken by water during the rinsing process after development. This can improve or prevent the actual opening size of the fourth opening 62 from increasing relative to the design value. Ultimately, this can improve or prevent the increase in the reflectivity difference between the fourth opening 62 area and other non-opening areas of the black matrix 6, ensuring that the fourth opening 62 is not easily recognized by the human eye and improving the appearance of the display panel.

[0106] In some embodiments, refer to Figure 2a and Figure 2b The cross-sectional shape of the support layer 5 perpendicular to the substrate 1 includes a trapezoid, with the base angle θ ranging from 30° to 50°. Specifically, the cross-sectional shape of the black matrix 6 forming the fourth opening 62 perpendicular to the substrate 1 includes an inverted trapezoid, with the acute angle of the inverted trapezoid ranging from 30° to 50°. This configuration allows the support layer 5 to support the sloping side of the inverted trapezoidal cross-sectional structure of the black matrix 6 forming the fourth opening 62, making it less likely for the sloping side of the inverted trapezoidal cross-sectional structure of the black matrix 6 to be broken by water during the rinsing process after development. This improves or prevents the actual opening size of the fourth opening 62 from increasing relative to the design value, ultimately improving or preventing an increase in the reflectivity difference between the fourth opening 62 area of ​​the black matrix 6 and other non-opening areas, ensuring that the fourth opening 62 is not easily visible to the human eye, and improving the appearance of the display panel.

[0107] In some embodiments, refer to Figure 2b The thickness d2 of the support layer 5 is greater than or equal to the thickness of the black matrix 6, and the four sides of the fourth opening 62 are in contact with the edge side A of the support layer 5.

[0108] In some embodiments, refer to Figure 2c The thickness d2 of the support layer 5 is less than the thickness of the black matrix 6. The four sides of the fourth opening 62 are in contact with the edge side A of the support layer 5 and the side surface B away from the substrate 1.

[0109] In some embodiments, refer to Figure 6a , Figure 6b , Figure 7a , Figure 7b , Figure 8a , Figure 8b , Figure 9a and Figure 9b A fifth opening 50 is provided in the support layer 5, and the orthographic projection of the fifth opening 50 on the substrate 1 is located within the orthographic projection of the fourth opening 62 on the substrate 1. By providing the fifth opening 50 in the support layer 5, the transmittance of ambient light at the fourth opening 62 in the black matrix 6 can be further increased, thereby increasing the amount of ambient light illuminating the photosensitive surface of the photosensitive device, and thus enabling the photosensitive device to sense ambient light more accurately.

[0110] In some embodiments, refer to Figure 2a , Figure 2b , Figure 3a , Figure 3b , Figure 6a , Figure 6b , Figure 7a and Figure 7b The display panel also includes a first light-transmitting layer 7, located between the encapsulation layer 4 and the support layer 5. The orthographic projection of the first light-transmitting layer 7 on the substrate 1 at least covers the orthographic projection of the fourth opening 62 on the substrate 1. A sixth opening 70 is provided in the first light-transmitting layer 7. The orthographic projection of the sixth opening 70 on the substrate 1 covers the orthographic projection of the first opening 21 on the substrate 1, and the orthographic projection of the sixth opening 70 on the substrate 1 is located within the orthographic projection of the third opening 61 on the substrate 1. The display panel also includes a color resist layer 8, located in the sixth opening 70. The color resist layer 8 extends to the side of the black matrix 6 away from the substrate 1. The width d7 of the overlapping area of ​​the orthographic projections of the color resist layer 8 and the side of the first light-transmitting layer 7 away from the substrate 1 on the substrate 1 ranges from 0 to 6 μm.

[0111] In some embodiments, the orthographic projections of the color resist layer 8 and the black matrix 6 on the substrate 1 may partially overlap or not overlap, as long as there is no gap between their orthographic projections on the substrate 1. This can prevent light leakage from the light emitted by the light-emitting device 3 from occurring at a large viewing angle.

[0112] In some embodiments, refer to Figure 3a , Figure 3b , Figure 7a and Figure 7b The display panel also includes a first light-transmitting layer 7, located between the encapsulation layer 4 and the support layer 5. The orthographic projection of the first light-transmitting layer 7 on the substrate 1 at least covers the orthographic projection of the fourth opening 62 on the substrate 1. The support layer 5 and the first light-transmitting layer 7 are an integral structure.

[0113] The support layer 5 and the first light-transmitting layer 7 are made of the same material and formed by a single patterning process. For example, both the support layer 5 and the first light-transmitting layer 7 are made of light-transmitting resin material, and the first light-transmitting layer 7 and the support layer 5 can be formed simultaneously by a halftone exposure process.

[0114] In some embodiments, refer to Figure 4a and Figure 4b The display panel also includes a first light-transmitting layer 7, located between the encapsulation layer 4 and the support layer 5. The orthographic projection of the first light-transmitting layer 7 on the substrate 1 at least covers the orthographic projection of the fourth opening 62 on the substrate 1. A sixth opening 70 is provided in the first light-transmitting layer 7. The orthographic projection of the sixth opening 70 on the substrate 1 covers the orthographic projection of the first opening 21 on the substrate 1, and the orthographic projection of the sixth opening 70 on the substrate 1 is located within the orthographic projection of the third opening 61 on the substrate 1. The display panel also includes a color resist layer 8, located in the sixth opening 70. The color resist layer 8 extends between the first light-transmitting layer 7 and the black matrix 6, and extends into the fourth opening 62. The portion of the color resist layer 8 located in the fourth opening 62 is reused as the support layer 5.

[0115] In some embodiments, the color resist layer 8 includes a red color resist, a green color resist, and a blue color resist. The color resists of different colors are located in different sixth openings 70. The color resist layer 8 can improve or prevent the display panel from reflecting ambient light, and at the same time, the display panel does not need to be equipped with a polarizer.

[0116] In this embodiment, the halftone exposure process can simultaneously form the pattern of the color resist layer 8 and the pattern of the portion of the color resist layer 8 located in the fourth opening 62 (i.e., the support layer 5).

[0117] In some embodiments, refer to Figure 8a and Figure 8b ,exist Figure 4a and Figure 4b Based on the display panel structure, a fifth opening 50 is provided in the support layer 5, and the orthographic projection of the fifth opening 50 on the substrate 1 is located within the orthographic projection of the fourth opening 62 on the substrate 1; a seventh opening 80 is provided in the portion of the color resist layer 8 located outside the fourth opening 62, and the orthographic projection of the seventh opening 80 on the substrate 1 is located within the orthographic projection of the fifth opening 50 on the substrate 1. That is, the fifth opening 50 and the seventh opening 80 are connected.

[0118] Specifically, by opening a fifth opening 50 in the support layer 5 and a seventh opening 80 in the color resist layer 8, and by connecting the fifth opening 50 and the seventh opening 80, the transmittance of ambient light at the fourth opening 62 in the black matrix 6 can be further increased, thereby increasing the amount of ambient light irradiating the photosensitive surface of the photosensitive device, and thus enabling the photosensitive device to sense ambient light more accurately.

[0119] In some embodiments, refer to Figure 5a and Figure 5bThe display panel also includes a first light-transmitting layer 7, located between the encapsulation layer 4 and the support layer 5. The orthographic projection of the first light-transmitting layer 7 on the substrate 1 at least covers the orthographic projection of the fourth opening 62 on the substrate 1. A sixth opening 70 is formed in the first light-transmitting layer 7. The orthographic projection of the sixth opening 70 on the substrate 1 covers the orthographic projection of the first opening 21 on the substrate 1, and the orthographic projection of the sixth opening 70 on the substrate 1 is located within the orthographic projection of the third opening 61 on the substrate 1. The display panel also includes a color resist layer 8, located in the sixth opening 70, and extending between the first light-transmitting layer 7 and the support layer 5. A seventh opening 80 is formed in the color resist layer 8. The orthographic projection of the seventh opening 80 on the substrate 1 is located within the orthographic projection of the fourth opening 62 on the substrate 1. The display panel also includes a second light-transmitting layer 9, located in the seventh opening 80, and the second light-transmitting layer 9 contacts the surrounding sidewalls of the seventh opening 80. The second light-transmitting layer 9 and the support layer 5 are an integral structure.

[0120] The second light-transmitting layer 9 uses the same light-transmitting material as the support layer 5.

[0121] In some embodiments, refer to Figure 9a and Figure 9b ,exist Figure 5a and Figure 5b Based on the display panel structure, a fifth opening 50 is provided in the support layer 5, and the orthographic projection of the fifth opening 50 on the substrate 1 is located within the orthographic projection of the fourth opening 62 on the substrate 1; an eighth opening 90 is provided in the second light-transmitting layer 9, and the orthographic projection of the eighth opening 90 on the substrate 1 is located within the orthographic projection of the fifth opening 50 on the substrate 1. That is, the fifth opening 50 and the eighth opening 90 are connected.

[0122] Specifically, by opening a fifth opening 50 in the support layer 5 and an eighth opening 90 in the second light-transmitting layer 9, and by connecting the fifth opening 50 and the eighth opening 90, the transmittance of ambient light at the fourth opening 62 in the black matrix 6 can be further increased, thereby increasing the amount of ambient light irradiating the photosensitive surface of the photosensitive device, and thus enabling the photosensitive device to sense ambient light more accurately.

[0123] In some embodiments, the opening size of the fifth opening 50 is less than or equal to the opening size of the fourth opening 62. This configuration allows the support layer 5 to provide good support for the surrounding sidewalls of the fourth opening 62, making it less likely for the surrounding sidewalls of the fourth opening 62 in the black matrix 6 to be broken by water during the rinsing process after development. This improves or prevents the actual opening size of the fourth opening 62 from increasing relative to the design value, ensuring that the fourth opening 62 is not easily visible to the human eye. On the other hand, it further increases the transmittance of ambient light at the fourth opening 62 of the black matrix 6, thereby increasing the amount of ambient light illuminating the photosensitive surface of the photosensitive device, and thus enabling the photosensitive device to sense ambient light more accurately.

[0124] In some embodiments, the pixel defining layer 2 is further provided with a second opening 22, and the orthographic projections of the second opening 22 and the first opening 21 on the substrate 1 do not overlap; the orthographic projection of the fourth opening 62 on the substrate 1 is located within the orthographic projection of the second opening 22 on the substrate 1; the opening size of the fourth opening 62 is less than or equal to the opening size of the second opening 22.

[0125] The pixel defining layer 2 is made of a black opaque material, such as black resin. The pixel defining layer 2 further absorbs ambient light incident on the display panel, thereby improving or preventing the reflection of ambient light by the conductive metal layer in the substrate 1, thus enhancing the display effect of the display panel. The second opening 22 in the pixel defining layer 2 allows ambient light to pass through it and the fourth opening 62 in the black matrix 6 before illuminating the photosensitive surface of the photosensitive device, ensuring the photosensitive device's ability to sense ambient light. The opening size of the fourth opening 62 is smaller than or equal to the opening size of the second opening 22, further improving or preventing an increase in the reflectivity difference between the fourth opening 62 area and other non-opening areas of the black matrix 6, thus ensuring that the fourth opening 62 is not easily visible to the human eye.

[0126] In some embodiments, the distance d3 between the orthographic projections of the fourth opening 62 and the second opening 22 on the substrate 1 ranges from 0.5 to 2 μm, the distance d4 between the orthographic projections of the fourth opening 62 and the fifth opening 50 on the substrate 1 ranges from 1 to 3 μm, the opening size d1 of the fourth opening 62 ranges from 5 to 15 μm, and the thickness d2 of the support layer 5 ranges from 1 to 2 μm.

[0127] In some embodiments, the opening size of the sixth opening 70 is greater than or equal to the opening size of the first opening 21, and the distance d5 between the orthographic projections of the sixth opening 70 and the first opening 21 on the substrate 1 ranges from 0 to 3 μm; the thickness of the first light-transmitting layer 7 ranges from 1.5 to 2.5 μm; the refractive index of the first light-transmitting layer 7 ranges from 1.45 to 1.5; the cross-sectional shape of the first light-transmitting layer 7 perpendicular to the substrate 1 includes a trapezoid, and the angle α of the base angle of the trapezoid ranges from 45 to 85°.

[0128] The opening size of the sixth opening 70 is greater than or equal to the opening size of the first opening 21, which enables the light emitted by the light-emitting device 3 to be emitted within the opening range of the sixth opening 70, thereby ensuring that the light-emitting device 3 emits light within the set viewing angle range.

[0129] In some embodiments, the opening size of the third opening 61 is larger than the opening size of the first opening 21, the distance d6 between the orthographic projections of the third opening 61 and the first opening 21 on the substrate 1 ranges from 3 to 6 μm, and the thickness of the black matrix 6 ranges from 1 to 2 μm.

[0130] The third opening 61 has a larger opening size than the first opening 21, allowing the light emitted by the light-emitting device 3 to exit within the opening range of the third opening 61, thereby ensuring that the light-emitting device 3 emits light within a set viewing angle range. In this embodiment, the opening sizes of the sixth opening 70 and the third opening 61 gradually increase relative to the first opening 21, thus ensuring that the light-emitting device 3 emits light within a set viewing angle range.

[0131] In some embodiments, the refractive index of the color resist layer 8 is in the range of 1.65 to 1.75, and the thickness of the color resist layer 8 located in the sixth opening 70 is in the range of 2 to 4 μm.

[0132] In this embodiment, since the refractive index of the color resist layer 8 is greater than that of the first light-transmitting layer 7, and the tilt angle of the contact interface between the first light-transmitting layer 7 and the color resist layer 8 is 45-85°, the light emitted by the light-emitting device 3 will undergo total internal reflection when it enters the contact interface between the color resist layer 8 and the first light-transmitting layer 7 (i.e., the sloping side of the first light-transmitting layer 7), thereby improving the light emission efficiency of the light-emitting device 3 within the positive viewing angle range.

[0133] In some embodiments, refer to Figure 2d and Figure 2e There are multiple first openings 21 and multiple second openings 22. The orthographic projection of the second opening 22 on the substrate 1 is located in the interval area between the orthographic projections of two adjacent first openings 21 on the substrate 1. The substrate 1 includes a photosensitive device (not shown in the figure), the photosensitive surface of the photosensitive device faces the side where the light-emitting device 3 is located, and the orthographic projection of the multiple second openings 22 on the substrate 1 is located within the photosensitive surface of the photosensitive device.

[0134] The multiple second openings 22 enable the photosensitive device to accurately sense ambient light.

[0135] In some embodiments, the display panel further includes a touch layer 10 located between the encapsulation layer 4 and the first light-transmitting layer 7. The orthographic projections of the touch layer 10 and the light-emitting device 3 on the substrate 1 do not overlap. The orthographic projection of the first light-transmitting layer 7 on the substrate 1 covers the orthographic projection of the touch layer 10 on the substrate 1. The first light-transmitting layer 7 can protect the touch layer 10 and prevent external moisture from corroding the touch layer 10.

[0136] In some embodiments, refer to Figure 2a , Figure 2b , Figure 3a , Figure 3b , Figure 6a , Figure 6b , Figure 7a and Figure 7bThe display panel also includes a planarization layer 11, located on the side of the black matrix 6 away from the substrate 1. The planarization layer 11 is made of a light-transmitting material, such as resin. The planarization layer 11 can make the display side surface of the display panel flat. At the same time, the planarization layer 11 can cover and protect all the film layers disposed on the side of the encapsulation layer 4 away from the substrate 1.

[0137] Based on the above structure of the display panel, this disclosure also provides a method for manufacturing the display panel, which includes preparing a substrate; sequentially preparing a pixel defining layer, a light-emitting device, an encapsulation layer, a support layer, and a black matrix on one side of the substrate; a first opening is provided in the pixel defining layer; the light-emitting device is located in the first opening; a third opening and a fourth opening are provided in the black matrix, the orthographic projection of the third opening on the substrate covers the orthographic projection of the first opening on the substrate, and the orthographic projections of the fourth opening and the third opening on the substrate do not overlap; the support layer is located in the fourth opening, and the support layer is in contact with the surrounding sidewalls of the fourth opening.

[0138] In some embodiments, after the encapsulation layer is fabricated and before the support layer is fabricated, a first light-transmitting layer is further fabricated; the orthographic projection of the first light-transmitting layer on the substrate at least covers the orthographic projection of the fourth opening on the substrate; after the black matrix is ​​fabricated, a color resist layer is further fabricated. This fabrication process can be used to fabricate... Figure 2a , Figure 3a , Figure 6a and Figure 7a The display panel in the middle.

[0139] In some embodiments, after the first light-transmitting layer is prepared and before the black matrix is ​​prepared, a color resist layer is further prepared; the color resist layer extends into the fourth opening, and the portion of the color resist layer located in the fourth opening is reused as a support layer. This preparation process can be used to prepare... Figure 4a The display panel in the middle.

[0140] In some embodiments, after the first light-transmitting layer is prepared and before the support layer is prepared, a color resist layer is further prepared; the color resist layer extends between the first light-transmitting layer and the support layer. This preparation process can be used to prepare... Figure 5a , Figure 8a and Figure 9a The display panel in the middle.

[0141] The display panel provided in this embodiment, by placing the support layer in the fourth opening and having the support layer in contact with the four sidewalls of the fourth opening, can support the four sidewalls of the fourth opening. This makes it less likely that the four sidewalls of the fourth opening in the black matrix will be broken by water during the rinsing process after development. This can improve or avoid the actual opening size of the fourth opening from increasing relative to the design value. Ultimately, it can improve or avoid the increase in the reflectivity difference between the fourth opening area and other non-opening areas of the black matrix, ensuring that the fourth opening is not easily recognized by the human eye and improving the appearance of the display panel.

[0142] Secondly, embodiments of this disclosure also provide a display device, which includes the display panel described in the above embodiments.

[0143] By using the display panel in the above embodiments, it is possible to ensure that the display side of the display device is not easily recognized by the human eye in the area corresponding to the photosensitive device, thereby improving the appearance of the display device.

[0144] The display device provided in this disclosure can be any product or component with display function, such as an OLED panel, OLED TV, OLED billboard, monitor, mobile phone, or navigator.

[0145] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display panel, wherein, Including substrate, A pixel defining layer is located on one side of the substrate, and a first opening is formed in the pixel defining layer; The light-emitting device is located in the first opening; An encapsulation layer, located on the side of the pixel defining layer and the light-emitting device facing away from the substrate, is used to encapsulate the light-emitting device; A support layer and a black matrix are stacked sequentially on the side of the encapsulation layer opposite to the substrate. The black matrix has a third opening and a fourth opening. The orthographic projection of the third opening on the substrate covers the orthographic projection of the first opening on the substrate. The orthographic projections of the fourth opening and the third opening on the substrate do not overlap. The support layer is located in the fourth opening, and the support layer is in contact with the surrounding sidewalls of the fourth opening.

2. The display panel according to claim 1, wherein, The cross-sectional shape of the support layer perpendicular to the substrate includes a trapezoid. The base angle of the trapezoid ranges from 30° to 50°.

3. The display panel according to claim 2, wherein, The thickness of the support layer is greater than or equal to the thickness of the black matrix, and the four sidewalls of the fourth opening are in contact with the edge sidewalls of the support layer. Alternatively, the thickness of the support layer is less than the thickness of the black matrix, and the four sidewalls of the fourth opening are in contact with the edge sidewalls of the support layer and the surface away from the substrate.

4. The display panel according to claim 3, wherein, The support layer has a fifth opening. The orthographic projection of the fifth opening on the substrate lies within the orthographic projection of the fourth opening on the substrate.

5. The display panel according to any one of claims 1-4, wherein, It also includes a first light-transmitting layer located between the encapsulation layer and the support layer, wherein the orthogonal projection of the first light-transmitting layer on the substrate at least covers the orthogonal projection of the fourth opening on the substrate; The support layer and the first light-transmitting layer are an integral structure.

6. The display panel according to claim 3, wherein, It also includes a first light-transmitting layer located between the encapsulation layer and the support layer, wherein the orthogonal projection of the first light-transmitting layer on the substrate at least covers the orthogonal projection of the fourth opening on the substrate; A sixth opening is provided in the first light-transmitting layer. The orthographic projection of the sixth opening on the substrate covers the orthographic projection of the first opening on the substrate, and the orthographic projection of the sixth opening on the substrate is located within the orthographic projection of the third opening on the substrate; The display panel also includes a color resist layer located in the sixth opening. The color resist layer also extends between the first light-transmitting layer and the black matrix, and extends into the fourth opening, wherein the portion of the color resist layer located in the fourth opening is reused as the support layer.

7. The display panel according to claim 6, wherein, The support layer has a fifth opening, and the orthographic projection of the fifth opening on the substrate is located within the orthographic projection of the fourth opening on the substrate. The color resist layer has a seventh opening in the portion other than the fourth opening, and the orthographic projection of the seventh opening on the substrate is located within the orthographic projection of the fifth opening on the substrate.

8. The display panel according to claim 3, wherein, It also includes a first light-transmitting layer located between the encapsulation layer and the support layer, wherein the orthogonal projection of the first light-transmitting layer on the substrate at least covers the orthogonal projection of the fourth opening on the substrate; A sixth opening is provided in the first light-transmitting layer. The orthographic projection of the sixth opening on the substrate covers the orthographic projection of the first opening on the substrate, and the orthographic projection of the sixth opening on the substrate is located within the orthographic projection of the third opening on the substrate; The display panel also includes a color resist layer located in the sixth opening and extending between the first light-transmitting layer and the support layer. The color resist layer has a seventh opening, and the orthographic projection of the seventh opening on the substrate is located within the orthographic projection of the fourth opening on the substrate; The display panel further includes a second light-transmitting layer located in the seventh opening, and the second light-transmitting layer is in contact with the surrounding sidewalls of the seventh opening; The second light-transmitting layer and the supporting layer are an integral structure.

9. The display panel according to claim 8, wherein, The support layer has a fifth opening, and the orthographic projection of the fifth opening on the substrate is located within the orthographic projection of the fourth opening on the substrate. The second light-transmitting layer has an eighth opening, and the orthographic projection of the eighth opening on the substrate is located within the orthographic projection of the fifth opening on the substrate.

10. The display panel according to claim 4, 7 or 9, wherein, The opening size of the fifth opening is less than or equal to the opening size of the fourth opening.

11. The display panel according to claim 10, wherein, The pixel defining layer is further provided with a second opening, and the orthographic projections of the second opening and the first opening on the substrate do not overlap. The orthographic projection of the fourth opening on the substrate is located within the orthographic projection of the second opening on the substrate; The opening size of the fourth opening is less than or equal to the opening size of the second opening.

12. The display panel according to claim 11, wherein, The distance between the orthographic projections of the fourth opening and the second opening on the substrate ranges from 0.5 to 2 μm. The distance between the orthographic projections of the fourth opening and the fifth opening on the substrate ranges from 1 to 3 μm. The opening size of the fourth opening ranges from 5 to 15 μm. The thickness of the support layer ranges from 1 to 2 μm.

13. The display panel according to claim 6, 8 or 9, wherein, The opening size of the sixth opening is greater than or equal to the opening size of the first opening. The distance between the orthographic projections of the sixth opening and the first opening on the substrate is in the range of 0 to 3 μm. The thickness of the first light-transmitting layer ranges from 1.5 to 2.5 μm; The refractive index of the first light-transmitting layer ranges from 1.45 to 1.5; The cross-sectional shape of the first light-transmitting layer perpendicular to the substrate includes a trapezoid, and the angle of the base angle of the trapezoid ranges from 45° to 85°.

14. The display panel according to claim 13, wherein, The opening size of the third opening is larger than the opening size of the first opening. The distance between the orthographic projections of the third opening and the first opening on the substrate ranges from 3 to 6 μm. The thickness of the black matrix ranges from 1 to 2 μm.

15. The display panel according to claim 14, wherein, The refractive index of the color resist layer ranges from 1.65 to 1.

75. The thickness of the color resist layer located in the sixth opening ranges from 2 to 4 μm.

16. The display panel according to any one of claims 1-4, wherein, It also includes a first light-transmitting layer located between the encapsulation layer and the support layer, wherein the orthogonal projection of the first light-transmitting layer on the substrate at least covers the orthogonal projection of the fourth opening on the substrate; A sixth opening is provided in the first light-transmitting layer. The orthographic projection of the sixth opening on the substrate covers the orthographic projection of the first opening on the substrate, and the orthographic projection of the sixth opening on the substrate is located within the orthographic projection of the third opening on the substrate; The display panel also includes a color resist layer located in the sixth opening. The color resist layer also extends to the side of the black matrix opposite to the substrate, and the width of the overlapping area of ​​the orthographic projection of the color resist layer and the side of the first light-transmitting layer opposite to the substrate on the substrate ranges from 0 to 6 μm.

17. The display panel according to claim 11, wherein, There are multiple first openings and multiple second openings. The orthographic projection of the second opening on the substrate is located in the interval region between the orthographic projections of two adjacent first openings on the substrate; The substrate includes a photosensitive device, with the photosensitive surface of the photosensitive device facing the side where the light-emitting device is located. The orthographic projection of the plurality of second openings on the substrate lies within the photosensitive surface of the photosensitive device.

18. A display device, wherein, Includes the display panel as described in any one of claims 1-17.

19. A method for manufacturing a display panel, wherein, Including substrate preparation; A pixel defining layer, a light-emitting device, an encapsulation layer, a support layer, and a black matrix are sequentially fabricated on one side of the substrate. The pixel defining layer has a first opening; The light-emitting device is located in the first opening; The black matrix has a third opening and a fourth opening. The orthographic projection of the third opening on the substrate covers the orthographic projection of the first opening on the substrate. The orthographic projections of the fourth opening and the third opening on the substrate do not overlap. The support layer is located in the fourth opening, and the support layer is in contact with the surrounding sidewalls of the fourth opening.

20. The preparation method according to claim 19, wherein, After the encapsulation layer is prepared and before the support layer is prepared, a first light-transmitting layer is also prepared; the orthographic projection of the first light-transmitting layer on the substrate at least covers the orthographic projection of the fourth opening on the substrate. After the black matrix is ​​prepared, the process also includes preparing a color resist layer. Alternatively, after the first light-transmitting layer is prepared and before the black matrix is ​​prepared, a color resist layer is also prepared; the color resist layer extends into the fourth opening, and the portion of the color resist layer located in the fourth opening is reused as the support layer; Alternatively, after the first light-transmitting layer is prepared and before the support layer is prepared, a color resist layer is also prepared; the color resist layer extends between the first light-transmitting layer and the support layer.

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