Display panel and display apparatus

Abstract

Provided in the present application are a display panel and a display apparatus. The display panel comprises: a light-emitting substrate comprising a pixel definition layer and a light-emitting structure layer and further comprising partition members; and a light output functional layer comprising a prism portion, wherein the orthographic projection of a first side edge of the partition member on the pixel definition layer falls on one side of the orthographic projection of a second side edge of the prism portion on the pixel definition layer; the orthographic projection of one end of the second side edge of the prism portion on the pixel definition layer falls on a side wall of one pixel opening; and the orthographic projection of the other end of the second side edge of the prism portion on the pixel definition layer falls outside the side wall of said pixel opening.

Description

Display panel and display device

[0001] This application claims priority to Chinese patent application No. 202411443861.7, filed on October 15, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0003] Organic light-emitting diodes (OLEDs) possess characteristics such as low power consumption, fast response speed, and wide viewing angle, making them promising for future applications. Currently, OLED display technology is widely used in various electronic products, from small items like smart bracelets, smartwatches, smartphones, and tablets to large devices like laptops, desktop computers, and televisions. As people spend increasingly more time using electronic products, the demand for lower power consumption is becoming more urgent, leading to the emergence of various power-saving OLED technologies. These include tandem display technology, polarizer-free (POL-Less) technology, and micro-lens panel (MLP) display technology. Currently, combinations of power-saving technologies are gaining increasing popularity.

[0004] Microprism technology, as a power-saving technology, can often improve light output efficiency by more than 10%. Its disadvantage is that the brightness attenuation ratio (L-Decay) is relatively high. Technical issues

[0005] In view of this, this application provides a display panel and display device that can reduce the brightness attenuation ratio of the display device and have high light extraction efficiency. Technical solutions

[0006] To solve the above problems, the technical solution provided in this application is as follows:

[0007] In a first aspect, this application provides a display panel, comprising: a light-emitting substrate, including a pixel definition layer and a light-emitting structure layer, the pixel definition layer having a pixel opening, the light-emitting structure layer including a plurality of light-emitting units, one light-emitting unit being located within a pixel opening; one light-emitting unit including a plurality of sub-light-emitting units stacked and connected in series; the light-emitting substrate further comprising a partition member disposed on the pixel definition layer and located on one side of the light-emitting unit, the light-emitting structure layer being interrupted at the partition member; the partition member including a first side edge inclined relative to the light-emitting substrate; the pixel opening including a sidewall inclined relative to the light-emitting substrate; and a light-emitting functional layer located on the light-emitting side of the light-emitting substrate; the light-emitting functional layer including a prism portion, the prism portion being positioned opposite to the pixel opening; the prism portion including a second side edge inclined relative to the light-emitting substrate.

[0008] In this configuration, the orthographic projection of the first side of the partition member onto the pixel definition layer falls on the side of the orthographic projection of the second side of the prism portion onto the pixel definition layer. The orthographic projection of one end of the second side of the prism portion onto the pixel definition layer falls on the sidewall of the pixel opening, and the orthographic projection of the other end of the second side of the prism portion onto the pixel definition layer falls outside the sidewall of the pixel opening.

[0009] Secondly, this application also provides a display device, which includes the display panel as described above. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0011] Figure 1 is a cross-sectional view of a display panel provided in some embodiments of this application.

[0012] Figure 2 is an enlarged view of the partition shown in Figure 1.

[0013] Figure 3 is an enlarged view of the prism section shown in Figure 1.

[0014] Figure 4 is a cross-sectional view of the light-emitting structure layer (with cathode) of the display panel shown in Figure 1.

[0015] Figure 5 is a schematic diagram of the light source of the display panel shown in Figure 1 and the light source of the prior art.

[0016] Figure 6 is a cross-sectional view of a partial film layer of another display panel provided in some embodiments of this application.

[0017] Figure 7 is a cross-sectional view of a display panel provided in some embodiments of this application.

[0018] Figure 8 is a schematic diagram of a display device provided in some embodiments of this application. Embodiments of the present invention

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "upper," "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0021] Reference numerals and / or reference letters may be repeated in different embodiments of this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various implementations and / or settings discussed.

[0022] Please refer to Figures 1 to 4. This application provides a display panel 100, which includes a light-emitting substrate 110 and a light-emitting functional layer 120. The light-emitting functional layer 120 is located on the light-emitting side of the light-emitting substrate 110. The light-emitting substrate 110 includes a pixel definition layer 10 and a light-emitting structure layer 20. The pixel definition layer 10 has a pixel opening 11. The light-emitting structure layer 20 includes a plurality of light-emitting units 21, and each light-emitting unit 21 is located within a pixel opening 11. Each light-emitting unit 21 includes a plurality of sub-light-emitting units 211 stacked and connected in series. The light-emitting functional layer 120 includes a prism portion 30, and the orthographic projection of the prism portion 30 onto the pixel definition layer 10 covers the pixel opening 11.

[0023] Since a light-emitting unit 21 includes two sub-light-emitting units stacked and connected in series, the display panel 100 of this application uses Tandem display technology. Furthermore, since it has a light-emitting functional layer 120 that includes a prism portion 30, the display panel 100 of this application uses MLP display technology. Compared to a simple microprism display device, this application combines Tandem display technology with MLP display technology, utilizing the low brightness attenuation ratio of Tandem display technology to reduce the brightness attenuation ratio of the display panel using MLP technology.

[0024] Please continue referring to Figure 1. In some embodiments of this application, the light-emitting substrate 110 further includes a partition 40. The partition 40 is disposed on the pixel definition layer 10 and located on one side of the light-emitting unit 21, and the light-emitting structure layer 20 is interrupted at the partition 40. The orthographic projection of the prism portion 30 on the pixel definition layer 10 does not overlap with the orthographic projection of the partition 40 on the pixel definition layer 10.

[0025] The partition 40 can prevent the current in the light-emitting unit 21 in the adjacent pixel opening 11 from flowing laterally to the light-emitting unit 21 located in another pixel opening 11, thereby reducing the lateral conductivity of the n-CGL (charge generation layer, see below). In addition, the partition 40 can also refract some of the large-angle light from the light-emitting unit 21, causing it to be emitted from the light-emitting surface of the light-emitting functional layer 120, thereby improving the light-emitting efficiency.

[0026] Because the modulus of the corresponding prism portion of the display panel is large, its mechanical properties are poor. When the orthographic projection of the prism portion 30 on the pixel definition layer 10 overlaps with the orthographic projection of the partition member 40 on the pixel definition layer 10, the partition member 40 will further increase the modulus at that location, further deteriorating the mechanical properties of the display panel. When the orthographic projection of the prism portion 30 on the pixel definition layer 10 and the orthographic projection of the partition member 40 on the pixel definition layer 10 do not overlap, the mechanical properties of the display panel can be improved to a certain extent. In addition, since the prism portion 30 and the partition member 40 do not overlap, the partition member 40 can refract some of the large-angle light from the light-emitting unit 21 at the first side 41 of the partition member 40 without being affected by the prism portion 30. This allows the refracted light to exit from the light-emitting surface of the light-emitting functional layer 120 that avoids the prism portion 30, thereby improving the light-emitting efficiency. The refracted light exits from the interior of the partition member 40.

[0027] Please refer to Figures 1 and 2. In these figures, the light-emitting substrate 110 and the light-emitting functional layer 120 are stacked in the first direction Z, and multiple spacers 40 or multiple pixel openings 11 are spaced apart in the second direction X, which intersects with the first direction Z.

[0028] In some embodiments of this application, the dimension of the end of the partition 40 connected to the pixel definition layer 10 is smaller than the dimension of the end of the partition 40 away from the pixel definition layer 10; that is, one end of the partition 40 is smaller, and the other end is larger. For example, the cross-section of the partition 40 parallel to the plane formed by the first direction Z and the second direction X can be an inverted trapezoid.

[0029] In some embodiments of this application, the partition member 40 includes a first side 41, which is inclined relative to the light-emitting surface of the light-emitting substrate 110. The prism portion 30 includes a second side 31, which is inclined relative to the light-emitting surface of the light-emitting substrate 110. The pixel opening 11 includes a sidewall 111 inclined relative to the light-emitting surface of the light-emitting substrate 110. The first side 41 and the second side 31 are disposed adjacent to each other, and the orthographic projection of the second side 31 on the pixel definition layer 10 does not overlap with the orthographic projection of the first side 41 on the pixel definition layer 10. The orthographic projection of one end of the second side 31 of the prism portion 30 on the pixel definition layer 10 falls on the sidewall 111 of the pixel opening 11, and the orthographic projection of the other end of the second side 31 of the prism portion 30 on the pixel definition layer 10 falls outside the sidewall 111 of the pixel opening 11. Compared to the position of the prism in the prior art, the orthographic projection of one end of the second side of the prism in this application falls on the sidewall of the pixel opening on the pixel definition layer, and the orthographic projection of the other end of the second side of the prism falls outside the sidewall of the pixel opening on the pixel definition layer. In this way, some of the emitted light that cannot undergo total internal reflection on the second side of the prism can undergo total internal reflection on the second side of the prism, thereby improving the light utilization rate of the emitted light and further enhancing the light emission efficiency of the display panel.

[0030] In some embodiments of this application, the size of the orthographic projection of the first side 41 onto the pixel definition layer 10 along the second direction X is c, where c is greater than 0.

[0031] Compared to the orthographic projection of the second end C of the first side 41 of the partition member 40, which is far from the second end C of the pixel definition layer 10, the orthographic projection of the first end C′ of the first side 41 of the partition member 40, which is in contact with the pixel definition layer 10, is closer to the pixel opening 11.

[0032] Compared to the orthographic projection of the fourth end A, which is far from the pixel definition layer 10, on the second side 31 of the prism 30, which is close to the pixel definition layer 10, the orthographic projection of the third end A′, which is close to the pixel definition layer 10, on the pixel definition layer 10 is closer to the pixel opening 11.

[0033] Referring again to Figure 2, in some embodiments of this application, the partition 40 further includes a first surface 42 and a second surface 43. The first surface 42 is connected to the first side 41 and to the pixel definition layer 10, and the second surface 43 is connected to the first side 41 and faces away from the first surface 42. The angle between the first surface 42 and the first side 41 is ∠e1, and the vertical distance between the first surface 42 and the second surface is h. Then ∠e1 and h satisfy: ∠e1=105°±15°; h≤2.5μm. That is, the angle range of ∠e1 is 90°~120°. In this way, it can be ensured that the light-emitting structure layer 20 is completely disconnected at the partition 40, thereby ensuring a reduction in the lateral conductivity of n-CGL.

[0034] Please refer again to Figure 2. In some embodiments of this application, the angle between the second surface 43 and the first side 41 is ∠e2, which satisfies: ∠e2=65°±15°. That is, the angle range of ∠e2 is 50°~80°. In this way, it can be ensured that the first inorganic film layer 71 of the encapsulation layer 70 (see below) can be deposited at the partition member 40 to prevent the organic film layer 72 of the encapsulation layer 70 (see below) from contacting the light-emitting structure layer 20.

[0035] There are multiple pixel openings 11, and the orthographic projection of a partition 40 on the pixel definition layer 10 falls between two adjacent pixel openings 11.

[0036] Referring again to Figure 1, the light-emitting substrate 110 also includes a substrate 50 and an anode 60, with the anode 60 located on the substrate 50. The pixel definition layer 10 covers at least a portion of the anode 60, and at least a portion of the anode 60 is connected to the light-emitting unit 21 located within the pixel opening 11. The orthographic projection of the pixel opening 11 onto the substrate 50 has an inner boundary and an outer boundary. The inner boundary is away from the orthographic projection of the partition member 40 onto the substrate 50, and the outer boundary is close to the orthographic projection of the partition member 40 onto the substrate 50. That is, the inner boundary is the orthographic projection of the end of the sidewall of the pixel opening 11 connected to the anode 60 onto the substrate 50, and the outer boundary is the orthographic projection of the end of the sidewall of the pixel opening 11 away from the anode 60 onto the substrate 50.

[0037] Please refer again to Figure 1. In some embodiments of this application, the prism portion 30 includes a first prism end 301 and a second prism end 302, the size of the first prism end 301 being smaller than the size of the second prism end 302. The vertical distance n of the orthographic projection of the second end C of the first side 41 of the partition member 40 away from the substrate 50 onto the inner boundary is the same as the vertical distance m of the orthographic projection of the end of the second side 31 intersecting the first prism end 301 onto the inner boundary. The vertical distance a of the orthographic projection a of the end of the second side 31 intersecting the second prism end 302 onto the substrate 50 is also the same as the vertical distance a. Therefore, a is greater than 0, m is less than n, and n is greater than 0.

[0038] In some embodiments of this application, 0 ≤ m + a ≤ 2 μm. Referring to Figure 5, the incident point of light L1 emitted from the same position of the self-emissive unit on the second side A1A2 of the prism section (the second side position of the prism section in the prior art) is higher than the landing point on the second side 31 (AA′) of the prism section 30. Thus, some light L1 emitted from the same position of the self-emissive unit may not undergo total internal reflection on the second side A1A2 of the prism section (the second side position of the prism section in the prior art), but may undergo total internal reflection on the second side 31 (AA′) of the prism section 30. In this way, the light utilization rate of the emitted light is improved, and the light emission efficiency of the display panel is further improved.

[0039] In some embodiments of this application, n ≥ 4 μm, 1 ≤ m + a ≤ 2 μm. This further improves the light utilization rate of the emitted light.

[0040] In some embodiments of this application, the dimension of the prism portion 30 near the light-emitting substrate 110 along the second direction X is smaller than the dimension of the prism portion 30 away from the light-emitting substrate 110 along the second direction X. That is, the prism portion 30 has a structure that is larger at the top and smaller at the bottom. In this embodiment, the cross-section of the prism portion 30 parallel to the plane formed by the first direction Z and the second direction X is an inverted trapezoid. Accordingly, a portion of the light emitted from the light-emitting structure layer 20 can be incident on the second side 31 of the prism portion 30 and can undergo total internal reflection on the second side 31. At this time, total internal reflection occurs inside the prism portion 30.

[0041] Referring again to Figure 3, in some embodiments of this application, the prism portion 30 further includes a third side 32, which is spaced apart from and opposite to the second side 31 in the second direction X. The angle between the extension of the second side 31 and the extension of the third side 32 is ∠e3, where ∠e3 = 55° ± 15°. That is, the angle range of ∠e3 is 40° to 70°. The angle range of ∠e3 affects the degree of inclination of the third side 32 and the second side 31, and to a certain extent affects the value of n; the smaller the angle of ∠e3, the smaller the degree of inclination of the third side 32 and the second side 31, and the larger n is; the larger the angle of ∠e3, the greater the degree of inclination of the third side 32 and the second side 31, and the smaller n is.

[0042] Please refer again to Figure 4. In some embodiments of this application, the light-emitting structure layer 20 includes a light-emitting unit 21 and a cathode 22. The light-emitting unit 21 is connected to the anode 60 and the pixel definition layer 10, and the cathode 22 is located on the side of the light-emitting unit 21 away from the anode 60. The light-emitting unit 21 includes a plurality of sub-light-emitting units connected in series through a charge generation layer. In this embodiment, an example is given where one light-emitting unit 21 includes two sub-light-emitting units 211. The light-emitting unit 21 includes a first sub-light-emitting unit 211, a second sub-light-emitting unit 212, and a charge generation layer 213. The charge generation layer 213 is located between and connected in series with the first sub-light-emitting unit 211 and the second sub-light-emitting unit 212. The first sub-light-emitting unit 211 includes a first hole transport layer 2111, a first light-emitting layer 2112, and a first electron transport layer 2113. The first light-emitting layer 2112 is located between the first hole transport layer 2111 and the first electron transport layer 2113. The first electron transport layer 2113 is connected to the cathode 22, and the first hole transport layer 2111 is connected to the charge generation layer 213. The second sub-light-emitting unit 212 includes a second hole transport layer 2121, a second light-emitting layer 2122, and a second electron transport layer 2123, with the second light-emitting layer 2122 located between the second hole transport layer 2121 and the second electron transport layer 2123. The second electron transport layer 2123 is connected to the charge generation layer 213, and the second hole transport layer 2121 is connected to the anode 60.

[0043] When an electric current is applied, the holes generated at the anode and the electrons generated at the cathode move under the influence of the electric field, injecting into the hole transport layer and the electron transport layer respectively, and then migrating to the light-emitting layer. When the holes and electrons meet in the light-emitting layer, they generate energy excitons. After recombination in the light-emitting layer, the energy excitons mainly radiate energy outward in the form of photons, thereby producing visible light.

[0044] The display panel 100 of this application utilizes Tandem technology to connect multiple sub-light-emitting units in series, which can improve the lifespan and luminous efficiency of the device. When multiple sub-light-emitting units are connected in series, when emitting light of equal brightness is required, the luminous power of each sub-light-emitting unit is significantly less than that of a single light-emitting unit that is not connected in series. Thus, while ensuring luminous efficiency, it can prevent the aging of sub-light-emitting units and reduce the risk of brightness decay. Therefore, replacing the light-emitting element in the MLP device with the light-emitting unit 21 of this application can reduce the low brightness decay ratio of the MLP device. After the two are combined, the overall brightness decay ratio of the display panel is reduced. At the same time, the partition 40 can not only reduce the lateral conductivity of the n-CGL, but also refract the large-angle light emitted by the light-emitting unit and emit it through the light-emitting surface of the light-emitting functional layer 120, thereby improving the light-emitting efficiency of the display panel 100. That is, the display panel provided by this application can simultaneously have a superior brightness decay ratio and optical efficiency.

[0045] Please refer again to Figure 1. In some embodiments of this application, the light-emitting substrate 110 further includes an encapsulation layer 70. The encapsulation layer 70 is located on one side of the light-emitting structure layer 20 and covers the light-emitting structure layer 20. The encapsulation layer 70 covers the partition member 40. The encapsulation layer 70 includes a first inorganic film layer 71, an organic film layer 72, and a second inorganic film layer 73. The organic film layer 72 is located between the first inorganic film layer 71 and the second inorganic film layer 73. The first inorganic film layer 71 covers the light-emitting structure layer 20 and covers the partition member 40. The first inorganic film layer 71 is continuous at the partition member 40 to prevent the organic film layer 72 (see below) of the encapsulation layer 70 from contacting the light-emitting structure layer 20.

[0046] In some embodiments of this application, the light-emitting substrate 110 further includes a touch layer 80, which is located on the side of the encapsulation layer 70 away from the light-emitting structure layer 20, that is, on the side of the second inorganic film layer 73 away from the light-emitting structure layer 20, and the prism portion 30 is in contact with the touch layer 80. In other embodiments, the light-emitting substrate 110 may not include the touch layer 80.

[0047] Please refer to Figure 1 again. The light-emitting functional layer 120 includes a first sub-light-emitting functional layer 121 and a second sub-light-emitting functional layer 122. The first sub-light-emitting functional layer 121 is located on one side of the light-emitting substrate 110, and the second sub-light-emitting functional layer 122 is located on the side of the first sub-light-emitting functional layer 121 away from the light-emitting substrate 110. The first sub-light-emitting functional layer 121 is disposed around the prism portion 30. The refractive index of the prism portion 30 is greater than the refractive index of the first sub-light-emitting functional layer 121, and the refractive index of the prism portion 30 is the same as the refractive index of the second sub-light-emitting functional layer 122.

[0048] The size of the end of the prism portion 30 near the light-emitting substrate 110 is smaller than the size of the end of the prism portion 30 away from the light-emitting substrate 110. A portion of the light emitted by the light-emitting structure layer 20 can be incident on the second side 31 or the third side 32 and can undergo total internal reflection on the second side 31 or the third side 32.

[0049] In some embodiments of this application, the prism portion 30 is made of the same material as the second sub-light-emitting functional layer 122, and the prism portion 30 and the second sub-light-emitting functional layer 122 are integrally formed. Thus, the prism portion 30 can be formed together with the second sub-light-emitting functional layer 122, simplifying the manufacturing process.

[0050] The second light-emitting functional layer 122 is used as a planarization layer.

[0051] In some embodiments of this application, the modulus of the prism portion 30 and the second sub-light-emitting functional layer 122 is greater than the modulus of the first sub-light-emitting functional layer 121, and the tensile strength at break of the second sub-light-emitting functional layer 122 of the prism portion 30 is less than the tensile strength at break of the first sub-light-emitting functional layer 121. This reduces the longitudinal stress at the location of the prism portion 30, improving overall mechanical properties. In other words, the display panel provided by this application can simultaneously possess superior brightness attenuation ratio, optical efficiency, and mechanical properties.

[0052] Referring to Figure 6, this application also provides a display panel 200. The structure of the display panel 200 is similar to that of the display panel 100, except that the light-emitting functional layer 120 does not include a first sub-light-emitting functional layer 121, but only a second sub-light-emitting functional layer 122. The second sub-light-emitting functional layer 122 is connected to the light-emitting surface of the light-emitting substrate 110 and covers the prism portion 30. The refractive index of the prism portion 30 is greater than that of the second sub-light-emitting functional layer. The dimension of the end of the prism portion 30 near the light-emitting substrate 110 along the second direction X is greater than the dimension of the end of the prism portion 30 away from the light-emitting substrate 110 along the second direction X. A portion of the light emitted by the light-emitting structural layer 20 can be incident on the second side 31 or the third side 32 and can be refracted on the second side 31 or the third side 32.

[0053] In this embodiment, the cross section of the prism portion 30 parallel to the plane formed by the first direction Z and the second direction X is a trapezoid.

[0054] Referring to Figure 7, this application also provides a display panel 300. The structure of the display panel 300 is similar to that of the display panel 200, except that the prism portion 30 is made of the same material as the touch layer 80, and the prism portion 30 and the touch layer 80 are integrally formed. That is, the refractive index of the prism portion 30 and the touch layer 80 is the same and greater than the refractive index of the second sub-light-emitting functional layer 122. Thus, the prism portion 30 can be formed together with the touch layer 80, simplifying the manufacturing process. Accordingly, the second sub-light-emitting functional layer 122 can be fabricated first, followed by the touch layer 80 and the prism portion 30.

[0055] Referring to Figure 8, this application also provides a display device 1000, which includes the display panels 100 / 200 / 300 as described above. The display device can be an electronic product such as a smart bracelet, smartwatch, smartphone, tablet computer, laptop computer, desktop computer, or television.

[0056] The display panel and display device provided in this application include a light-emitting substrate and a light-emitting functional layer. The light-emitting substrate includes a pixel definition layer and a light-emitting structure layer. The pixel definition layer has a pixel opening, and the light-emitting structure layer is located inside the pixel opening. A light-emitting unit includes a plurality of sub-light-emitting units stacked and connected in series. The light-emitting substrate also includes a partition member disposed on the pixel definition layer and located on one side of the light-emitting unit. The light-emitting structure layer is broken at the partition member. The partition member includes a first side edge that is inclined relative to the light-emitting substrate. The pixel opening includes a side wall that is inclined relative to the light-emitting substrate. A light-emitting functional layer is located on the light-emitting side of the light-emitting substrate. The light-emitting functional layer includes a prism portion that is positioned opposite to the pixel opening. The prism portion includes a second side edge that is inclined relative to the light-emitting substrate. The orthographic projection of the first side edge of the partition member onto the pixel definition layer falls on the side of the orthographic projection of the second side edge of the prism portion onto the pixel definition layer. The orthographic projection of one end of the second side edge of the prism portion onto the pixel definition layer falls on the side wall of the pixel opening, and the orthographic projection of the other end of the second side edge of the prism portion onto the pixel definition layer falls outside the side wall of the pixel opening. Compared to simple microprism display devices, this application combines tandem display technology (the light-emitting structure layer includes stacked and connected light-emitting units) with MLP display technology (prism section). Utilizing the low brightness attenuation ratio of tandem display technology, the overall brightness attenuation ratio of the display panel is reduced. A portion of the large-angle light from the light-emitting units is refracted at the partition, causing the refracted light to exit from the light-emitting functional layer, bypassing the light-emitting surface of the prism section, thereby improving some of the light extraction efficiency. Furthermore, compared to the position of the prism section in the prior art, in this application, the orthographic projection of one end of the second side of the prism section onto the pixel definition layer falls on the sidewall of the pixel opening, while the orthographic projection of the other end of the second side of the prism section onto the pixel definition layer falls outside the sidewall of the pixel opening. This allows some emitted light that cannot undergo total internal reflection at the second side of the prism section to undergo total internal reflection at the second side of the prism section, improving the light utilization rate of the emitted light and further enhancing the light extraction efficiency of the display panel.

[0057] In addition, the display panel of this application can improve the lifespan and luminous efficiency of the device by connecting multiple light-emitting units in series.

[0058] Furthermore, the prism section is integrally formed with the second sub-light-emitting functional layer. The modulus of the prism section is greater than that of the first sub-light-emitting functional layer, and the tensile strength at break of the prism section is less than that of the first sub-light-emitting functional layer. This reduces the longitudinal stress at the location of the prism section, thereby improving the overall mechanical properties.

[0059] In summary, although the present application has disclosed the preferred embodiments as described above, the above preferred embodiments are not intended to limit the present application. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be determined by the scope defined in the claims.

Claims

1. A display panel, wherein, include: The light-emitting substrate includes a pixel definition layer and a light-emitting structure layer; The pixel definition layer has a pixel opening; the light-emitting structure layer includes multiple light-emitting units, one of which is located within a pixel opening; each light-emitting unit includes multiple sub-light-emitting units stacked and connected in series; the light-emitting substrate further includes a partition member disposed on the pixel definition layer and located on one side of the light-emitting unit, the light-emitting structure layer being interrupted at the partition member; the partition member includes a first side edge inclined relative to the light-emitting substrate; the pixel opening includes a sidewall inclined relative to the light-emitting substrate; and A light-emitting functional layer is located on the light-emitting side of the light-emitting substrate; the light-emitting functional layer includes a prism portion, which is opposite to the pixel opening; the prism portion includes a second side edge that is inclined relative to the light-emitting substrate; Wherein, the orthographic projection of the first side of the partition member on the pixel definition layer falls on the side of the orthographic projection of the second side of the prism portion on the pixel definition layer, the orthographic projection of one end of the second side of the prism portion on the pixel definition layer falls on the sidewall of the pixel opening, and the orthographic projection of the other end of the second side of the prism portion on the pixel definition layer falls outside the sidewall of the pixel opening.

2. The display panel as claimed in claim 1, wherein, The dimension of the end of the partition member connected to the pixel definition layer is smaller than the dimension of the end of the partition member away from the pixel definition layer; the first side and the second side are arranged adjacent to each other; Wherein, the orthographic projection of the second side on the pixel definition layer does not overlap with the orthographic projection of the first side on the pixel definition layer.

3. The display panel as described in claim 2, wherein, The size of the end of the prism portion near the light-emitting substrate is greater than or less than the size of the end of the prism portion away from the light-emitting substrate; When the size of the prism portion near the light-emitting substrate is smaller than the size of the prism portion away from the light-emitting substrate, a portion of the light emitted by the light-emitting structure layer can be incident on the substrate. It is described on the second side and can undergo total internal reflection on the second side; When the size of the end of the prism portion near the light-emitting substrate is larger than the size of the end of the prism portion away from the light-emitting substrate, a portion of the light emitted by the light-emitting structure layer can be incident on the second side and can be refracted on the second side.

4. The display panel as claimed in claim 2, wherein, The light-emitting substrate further includes a substrate and an anode, the anode being located on the substrate; the pixel definition layer covers at least a portion of the anode, at least a portion of the anode being connected to the light-emitting unit located within the pixel opening; the light-emitting substrate and the light-emitting functional layer are stacked in a first direction, and the pixel openings are spaced apart in a second direction intersecting the first direction; the prism portion includes a first prism end and a second prism end, the size of the first prism end being smaller than the size of the second prism end; The orthographic projection of the pixel opening onto the substrate has an inner boundary and an outer boundary, the inner boundary being away from the orthographic projection of the partition member onto the substrate, and the outer boundary being close to the orthographic projection of the partition member onto the substrate; The vertical distance from the orthographic projection of the end of the first side of the partition away from the base to the inner boundary on the base is n, and the vertical distance from the orthographic projection of the end of the second side intersecting the first prism end to the inner boundary on the base is m. The vertical distance between the orthographic projection of the end of the second side that intersects with the end of the second prism on the substrate and the orthographic projection of the end of the second side that intersects with the end of the first prism on the substrate is a; Where m is less than n, m is greater than 0; 0 ≤ m + a ≤ 2μm.

5. The display panel as claimed in claim 2, wherein, The partition further includes a first surface and a second surface, the first surface being connected to the first side and to the pixel definition layer, and the second surface being connected to the first side and facing away from the first surface; the prism portion further includes a third side, and the third side and the second side are disposed opposite to each other; The angle between the first surface and the first side is ∠e1, the angle between the second surface and the first side is ∠e2, the angle between the extension of the second side and the extension of the third side is ∠e3, and the vertical distance between the first surface and the second surface is h. Then, ∠e1, ∠e2, and... The h satisfies: ∠e1＝105°±15°； h≤2.5μm; ∠e2=65°±15°; and ∠e3＝55°±15°。 6. The display panel as claimed in claim 1, wherein, The light-emitting substrate further includes an encapsulation layer, which is located on one side of the light-emitting structure layer and covers the light-emitting structure layer, and the encapsulation layer covers the partition member; The encapsulation layer includes a first inorganic film layer, an organic film layer, and a second inorganic film layer, wherein the organic film layer is located between the first inorganic film layer and the second inorganic film layer; The first inorganic film layer covers the light-emitting structure layer and encapsulates the partition, and the first inorganic film layer is continuous at the partition.

7. The display panel as claimed in claim 6, wherein, The light-emitting substrate further includes a touch layer, which is located on the side of the encapsulation layer away from the light-emitting structure layer; the prism portion is in contact with the touch layer.

8. The display panel as claimed in claim 7, wherein, The light-emitting functional layer includes a second sub-light-emitting functional layer, which is located on the light-emitting side of the light-emitting substrate and covers the prism portion; the refractive index of the prism portion is greater than the refractive index of the second sub-light-emitting functional layer. The prism part is made of the same material as the touch layer, and the prism part and the touch layer are integral.

9. The display panel as claimed in claim 1, wherein, The light-emitting functional layer includes a first sub-light-emitting functional layer and a second sub-light-emitting functional layer. The first sub-light-emitting functional layer is located on one side of the light-emitting substrate, and the second sub-light-emitting functional layer is located on the side of the first sub-light-emitting functional layer away from the light-emitting substrate. The first sub-light-emitting functional layer is disposed around the prism portion, and the refractive index of the prism portion is greater than the refractive index of the first sub-light-emitting functional layer. The prism portion is made of the same material as the second sub-light-emitting functional layer, and the prism portion and the second sub-light-emitting functional layer are integrally formed; and / or The modulus of the prism section and the second sub-light-emitting functional layer is greater than that of the first sub-light-emitting functional layer, and the tensile strength at break of the prism section and the second sub-light-emitting functional layer is less than that of the first sub-light-emitting functional layer.

10. The display panel as claimed in claim 1, wherein, The light-emitting functional layer includes a second sub-light-emitting functional layer, which is located on the light-emitting side of the light-emitting substrate and covers the prism portion. The refractive index of the prism is greater than that of the second sub-light-emitting functional layer.

11. A display device, wherein, Includes a display panel, the display panel comprising: A light-emitting substrate includes a pixel definition layer and a light-emitting structure layer; the pixel definition layer has a pixel opening, and the light-emitting structure layer includes a plurality of light-emitting units, one of which is located within one of the pixel openings; each light-emitting unit includes a plurality of sub-light-emitting units stacked and connected in series; the light-emitting substrate further includes a partition member disposed on the pixel definition layer and located on one side of the light-emitting unit, and the light-emitting structure layer is interrupted at the partition member; the partition member includes a first sidewall inclined relative to the light-emitting substrate; the pixel opening includes a sidewall inclined relative to the light-emitting substrate; and A light-emitting functional layer is located on the light-emitting side of the light-emitting substrate; the light-emitting functional layer includes a prism portion, which is opposite to the pixel opening; the prism portion includes a second side edge that is inclined relative to the light-emitting substrate; Wherein, the orthographic projection of the first side of the partition member on the pixel definition layer falls on the side of the orthographic projection of the second side of the prism portion on the pixel definition layer, the orthographic projection of one end of the second side of the prism portion on the pixel definition layer falls on the sidewall of the pixel opening, and the orthographic projection of the other end of the second side of the prism portion on the pixel definition layer falls outside the sidewall of the pixel opening.

12. The display device as claimed in claim 11, wherein, The dimension of the end of the partition member connected to the pixel definition layer is smaller than the dimension of the end of the partition member away from the pixel definition layer; the first side and the second side are arranged adjacent to each other; Wherein, the orthographic projection of the second side on the pixel definition layer does not overlap with the orthographic projection of the first side on the pixel definition layer.

13. The display device as claimed in claim 12, wherein, The size of the end of the prism portion near the light-emitting substrate is greater than or less than the size of the end of the prism portion away from the light-emitting substrate; When the size of the end of the prism portion near the light-emitting substrate is smaller than the size of the end of the prism portion away from the light-emitting substrate, a portion of the light emitted by the light-emitting structure layer can be incident on the second side and undergo total internal reflection on the second side. When the size of the end of the prism portion near the light-emitting substrate is larger than the size of the end of the prism portion away from the light-emitting substrate, a portion of the light emitted by the light-emitting structure layer can be incident on the second side and can be refracted on the second side.

14. The display device as claimed in claim 12, wherein, The light-emitting substrate further includes a substrate and an anode, the anode being located on the substrate; the pixel definition layer covers at least a portion of the anode, at least a portion of the anode being connected to the light-emitting unit located within the pixel opening; the light-emitting substrate and the light-emitting functional layer are stacked in a first direction, and the pixel openings are spaced apart in a second direction intersecting the first direction; the prism portion includes a first prism end and a second prism end, the size of the first prism end being smaller than the size of the second prism end; The orthographic projection of the pixel opening onto the substrate has an inner boundary and an outer boundary, the inner boundary being away from the orthographic projection of the partition member onto the substrate, and the outer boundary being close to the orthographic projection of the partition member onto the substrate; The vertical distance from the orthographic projection of the end of the first side of the partition away from the base to the inner boundary on the base is n, and the vertical distance from the orthographic projection of the end of the second side intersecting the first prism end to the inner boundary on the base is m. The vertical distance between the orthographic projection of the end of the second side that intersects with the end of the second prism on the substrate and the orthographic projection of the end of the second side that intersects with the end of the first prism on the substrate is a; Where m is less than n, m is greater than 0; 0 ≤ m + a ≤ 2μm.

15. The display device as claimed in claim 12, wherein, The partition further includes a first surface and a second surface, the first surface being connected to the first side and to the pixel definition layer, and the second surface being connected to the first side and facing away from the first surface; the prism portion further includes a third side, and the third side and the second side are disposed opposite to each other; The angle between the first surface and the first side is ∠e1, the angle between the second surface and the first side is ∠e2, the angle between the extension of the second side and the extension of the third side is ∠e3, and the vertical distance between the first surface and the second surface is h. Then ∠e1, ∠e2, and h satisfy: ∠e1＝105°±15°； h≤2.5μm; ∠e2=65°±15°; and ∠e3＝55°±15°。 16. The display device as claimed in claim 11, wherein, The light-emitting substrate further includes an encapsulation layer, which is located on one side of the light-emitting structure layer and covers the light-emitting structure layer, and the encapsulation layer covers the partition member; The encapsulation layer includes a first inorganic film layer, an organic film layer, and a second inorganic film layer, wherein the organic film layer is located between the first inorganic film layer and the second inorganic film layer; The first inorganic film layer covers the light-emitting structure layer and encapsulates the partition, and the first inorganic film layer is continuous at the partition.

17. The display device as claimed in claim 16, wherein, The light-emitting substrate further includes a touch layer, which is located on the side of the encapsulation layer away from the light-emitting structure layer; the prism portion is in contact with the touch layer.

18. The display device as claimed in claim 17, wherein, The light-emitting functional layer includes a second sub-light-emitting functional layer, which is located on the light-emitting side of the light-emitting substrate and covers the prism portion; the refractive index of the prism portion is greater than the refractive index of the second sub-light-emitting functional layer. The prism part is made of the same material as the touch layer, and the prism part and the touch layer are integral.

19. The display device as claimed in claim 11, wherein, The light-emitting functional layer includes a first sub-light-emitting functional layer and a second sub-light-emitting functional layer. The first sub-light-emitting functional layer is located on one side of the light-emitting substrate, and the second sub-light-emitting functional layer is located on the side of the first sub-light-emitting functional layer away from the light-emitting substrate. The first sub-light-emitting functional layer is disposed around the prism portion, and the refractive index of the prism portion is greater than the refractive index of the first sub-light-emitting functional layer. The prism portion is made of the same material as the second sub-light-emitting functional layer, and the prism portion and the second sub-light-emitting functional layer are integrally formed; and / or The modulus of the prism section and the second sub-light-emitting functional layer is greater than that of the first sub-light-emitting functional layer, and the tensile strength at break of the prism section and the second sub-light-emitting functional layer is less than that of the first sub-light-emitting functional layer.

20. The display device as claimed in claim 11, wherein, The light-emitting functional layer includes a second sub-light-emitting functional layer, which is located on the light-emitting side of the light-emitting substrate and covers the prism portion. The refractive index of the prism is greater than that of the second sub-light-emitting functional layer.

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