Display panel and display device

Abstract

The invention provides a display panel and a display device, and the display panel comprises a light-emitting substrate which comprises a pixel definition layer and a light-emitting structure layer; the pixel definition layer is provided with pixel openings, the light-emitting structure layer comprises a plurality of light-emitting units, and one light-emitting unit is located in one pixel opening; one light-emitting unit comprises a plurality of sub light-emitting units which are stacked and connected in series; the light-emitting substrate further comprises a partition part where the light-emitting structure layer is disconnected, and a light-emitting function layer located on the light-emitting side of the light-emitting substrate. The light emitting function layer comprises a prism part, and the orthographic projection of the prism part on the pixel definition layer covers the pixel opening; the orthographic projection of the first side edge of the partition piece on the pixel definition layer falls on one side of the orthographic projection of the second side edge of the prism part on the pixel definition layer, and the orthographic projection of one end of the second side edge of the prism part on 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 part on the pixel definition layer falls outside the side wall of the pixel opening.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) has the characteristics of low power consumption, fast response speed, wide viewing angle, etc., and has broad application prospects. At present, OLED display technology has been widely used in various electronic products, ranging from small electronic products such as smart bracelets, smart watches, smart phones, tablet computers, etc. to large electronic products such as laptops, desktop computers, and televisions. As people use electronic products for longer and longer time, the demand for power consumption is becoming more and more urgent, and various OLED technologies that reduce power consumption have emerged. For example, tandem display technology, polarizer-free (POL-Less) technology, and micro prism (Micro Lens Panel, MLP) display technology. At present, power-saving technology combinations are gradually gaining favor.

[0003] As a power-saving technology, microprism technology can often improve light output efficiency by more than 10%. Its disadvantage is that the brightness decay ratio (L-Decay) is relatively high. Summary of the invention

[0004] In view of this, the present application provides a display panel and a display device which can reduce the brightness attenuation ratio of a display device and have higher light extraction efficiency.

[0005] To solve the above problems, the technical solutions provided by this application are as follows:

[0006] The present application provides a display panel, which includes: a light-emitting substrate, including a pixel definition layer and a light-emitting structure layer, the pixel definition layer has a pixel opening, the light-emitting structure layer includes a plurality of light-emitting units, one light-emitting unit is located in one pixel opening; one light-emitting unit includes a plurality of sub-light-emitting units that are stacked and connected in series with each other; the light-emitting substrate also includes a partition, the partition is arranged on the pixel definition layer and is located on one side of the light-emitting unit, and the light-emitting structure layer is disconnected at the partition; the partition 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; and a light-emitting function layer that is located at the light-emitting side of the light-emitting substrate; the light-emitting function layer includes a prism portion, the prism portion is opposite to the pixel opening position; the prism portion includes a second side edge that is inclined relative to the light-emitting substrate;

[0007] Among them, 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 side wall 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 side wall of the pixel opening.

[0008] The present application also provides a display device, which includes the display panel as above.

[0009] The display panel and display device provided by the present application, the display panel includes a light-emitting substrate and a light-emitting functional layer, the light-emitting substrate includes a pixel definition layer and a light-emitting structural layer, the pixel definition layer has a pixel opening, and the light-emitting structural layer is located in 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, the partition is arranged on the pixel definition layer and is located on one side of the light-emitting unit, and the light-emitting structural layer is disconnected at the partition; the partition includes a first side edge inclined relative to the light-emitting substrate; the pixel opening includes a side wall inclined relative to the light-emitting substrate; and a light-emitting functional layer, which is located on the light-emitting side of the light-emitting substrate; the light-emitting functional layer includes a prism portion, the prism portion is opposite to the pixel opening; the prism portion includes a second side edge inclined relative to the light-emitting substrate; wherein the orthogonal projection of the first side edge of the partition member on the pixel definition layer falls on one side of the orthogonal projection of the second side edge of the prism portion on the pixel definition layer, the orthogonal projection of one end of the second side edge of the prism portion on the pixel definition layer falls on the side wall of the pixel opening, and the orthogonal 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 the pixel opening. Compared to a simple micro-prism display device, the present application combines the Tandem display technology (the light-emitting structure layer includes stacked and serially connected light-emitting units) with the MLP display technology (prism part), and utilizes the low brightness attenuation ratio of the Tandem display technology to reduce the overall brightness attenuation ratio of the display panel; part of the large-angle light from the light-emitting unit is refracted on the partition, so that the refracted light is emitted from the light-emitting surface of the light-emitting functional layer that avoids the prism part, thereby partially improving the light-emitting efficiency. In addition, compared to the position of the prism part of the prior art, the orthographic projection of one end of the second side of the prism part of the present application on 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 of the prism part on the pixel definition layer falls outside the side wall of the pixel opening, so that a part of the outgoing light that cannot be totally reflected on the second side of the prism part can be totally reflected on the second side of the prism part, the light utilization rate of the outgoing light is improved, and the light-emitting efficiency of the display panel is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 A cross-sectional view of a display panel provided in some embodiments of the present application.

[0012] Figure 2 for Figure 1 An enlarged view of the partition is shown.

[0013] Figure 3 for Figure 1 An enlarged view of the prism portion is shown.

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

[0015] Figure 5 for Figure 1 The light of the display panel and the light schematic diagram of the prior art are shown.

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

[0017] Figure 7 A cross-sectional view of a display panel provided for some embodiments of the present application.

[0018] Figure 8 A schematic diagram of a display device provided in some embodiments of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] The present application may repeat reference numerals and / or reference letters in different implementations. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various implementations and / or settings discussed.

[0022] See also Figures 1 to 4 The present application provides a display panel 100, which includes a light-emitting substrate 110 and a light-emitting functional layer 120, and 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, and the light-emitting structure layer 20 includes a plurality of light-emitting units 21, and one light-emitting unit 21 is located in one pixel opening 11. One light-emitting unit 21 includes a plurality of sub-light-emitting units 211 that are stacked and connected in series, and the light-emitting functional layer 120 includes a prism portion 30, and the orthographic projection of the prism portion 30 on the pixel definition layer 10 covers the pixel opening 11.

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

[0024] Please continue reading Figure 1 In some embodiments of the present application, the light-emitting substrate 110 further includes a partition 40, which 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 disconnected 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 of the light-emitting unit 21 in the adjacent pixel opening 11 from flowing laterally to the light-emitting unit 21 in another pixel opening 11, so as to reduce the lateral conductivity of the n-CGL (charge generation layer, see below for details). In addition, the partition 40 can also refract part of the large-angle light from the light-emitting unit 21, so that it is emitted from the light-emitting surface of the light-emitting functional layer 120, thereby improving part of the light-emitting efficiency.

[0026] Since the modulus of the position corresponding to the prism part of the display panel is large and the mechanical properties are poor, when the orthographic projection of the prism part 30 on the pixel definition layer 10 overlaps with the orthographic projection of the partition part 40 on the pixel definition layer 10, the partition part 40 will further increase the modulus at this position, and the mechanical properties of the display panel will further deteriorate. When the orthographic projection of the prism part 30 on the pixel definition layer 10 does not overlap with the orthographic projection of the partition part 40 on the pixel definition layer 10, the mechanical properties of the display panel can be improved to a certain extent. In addition, the prism part 30 does not overlap with the partition part 40, and the partition part 40 can be unaffected by the prism part 30. Part of the large-angle light from the light-emitting unit 21 is refracted on the first side 41 of the partition part 40, so that the refracted light is emitted from the light-emitting surface of the light-emitting functional layer 120 that avoids the prism part 30, thereby improving part of the light extraction efficiency. The refracted light is emitted from the inside of the partition part 40.

[0027] Please continue reading Figure 1 and Figure 2 , wherein the light emitting substrate 110 and the light output functional layer 120 are stacked in a first direction Z, a plurality of partitions 40 or a plurality of pixel openings 11 are spaced apart in a second direction X, and the second direction X intersects with the first direction Z.

[0028] In some embodiments of the present application, the size of one end of the partition member 40 connected to the pixel definition layer 10 is smaller than the size of the end of the partition member 40 away from the pixel definition layer 10, that is, one end of the partition member 40 is smaller and the other end is larger. For example, the cross section of the partition member 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 the present application, the partition member 40 includes a first side edge 41, and the first side edge 41 is arranged obliquely relative to the light emitting surface of the light emitting substrate 110. The prism portion 30 includes a second side edge 31, and the second side edge 31 is arranged obliquely relative to the light emitting surface of the light emitting substrate 110. The pixel opening 11 includes a side wall 111 arranged obliquely relative to the light emitting surface of the light emitting substrate 110. The first side edge 41 is arranged adjacent to the second side edge 31, and the orthographic projection of the second side edge 31 on the pixel definition layer 10 does not overlap with the orthographic projection of the first side edge 41 on the pixel definition layer 10. The orthographic projection of one end of the second side edge 31 of the prism portion 30 on the pixel definition layer 10 falls on the side wall 111 of the pixel opening 11, and the orthographic projection of the other end of the second side edge 31 of the prism portion 30 on the pixel definition layer 10 falls outside the side wall 111 of the pixel opening 11. Compared with the position of the prism portion in the prior art, the orthographic projection of one end of the second side edge of the prism portion of the present application on 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 on the pixel definition layer falls outside the side wall of the pixel opening. In this way, a portion of the outgoing light that cannot be totally reflected on the second side edge of the prism portion can be totally reflected on the second side edge of the prism portion, thereby improving the light utilization rate of the outgoing light and further improving the light output efficiency of the display panel.

[0030] In some embodiments of the present application, the dimension of the orthographic projection of the first side 41 on the pixel definition layer 10 along the second direction X is c, and c is greater than 0.

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

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

[0033] Please refer again Figure 2In some embodiments of the present application, the partition member 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 ≤ 2.5 μm. That is, the angle range of ∠e1 is 90° to 120°. In this way, it can be ensured that the light-emitting structure layer 20 is completely disconnected at the partition member 40 to ensure that the lateral conductivity of the n-CGL is reduced.

[0034] Please refer again Figure 2 In some embodiments of the present application, the angle between the second surface 43 and the first side 41 is ∠e2, then ∠e2 satisfies: ∠e2 = 65° ± 15°. That is, the angle range of ∠e2 is 50° to 80°. In this way, it can be ensured that the first inorganic film layer 71 (see below) of the encapsulation layer 70 (see below) can be deposited 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.

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

[0036] Please refer again Figure 1 , the light-emitting substrate 110 further includes a substrate 50 and an anode 60, wherein the anode 60 is 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 in the pixel opening 11. The orthographic projection of the pixel opening 11 on the substrate 50 has an inner boundary and an outer boundary, wherein the inner boundary is far from the orthographic projection of the partition member 40 on the substrate 50, and the outer boundary is close to the orthographic projection of the partition member 40 on the substrate 50. That is, the inner boundary is the orthographic projection of one end of the side wall of the pixel opening 11 connected to the anode 60 on the substrate 50, and the outer boundary is the orthographic projection of one end of the side wall of the pixel opening 11 away from the anode 60 on the substrate 50.

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

[0038] In some embodiments of the present application, 0≤m+a≤2μm. Figure 5 The incident point of the light L1 emitted from the same position of the self-luminous unit on the second side A1A2 of the prism part (the second side position of the prism part in the prior art) is higher than the landing point on the second side 31 (AA′) of the prism part 30. In this way, a part of the light L1 emitted from the same position of the self-luminous unit may not be totally reflected on the second side A1A2 of the prism part (the second side position of the prism part in the prior art), but may be totally reflected on the second side 31 (AA′) of the prism part 30. In this way, the light utilization rate of the emitted light is improved, and the light output efficiency of the display panel is further improved.

[0039] In some embodiments of the present application, n≥4 μm, 1≤m+a≤2 μm. In this way, the light utilization rate of the emitted light can be further improved.

[0040] In some embodiments of the present application, the dimension of the end of the prism portion 30 close to the light-emitting substrate 110 along the second direction X is smaller than the dimension of the end of the prism portion 30 away from the light-emitting substrate 110 along the second direction X. That is, the prism portion 30 is 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 in an inverted trapezoidal shape. Accordingly, a portion of the light emitted by the light-emitting structure layer 20 can be incident on the second side 31 of the prism portion 30 and can be totally reflected on the second side 31. At this time, total reflection occurs inside the prism portion 30.

[0041] Please refer again Figure 3In some embodiments of the present application, the prism portion 30 further includes a third side 32, and the third side 32 and the second side 31 are spaced and arranged opposite to each other in the second direction X. The angle between the extension line of the second side 31 and the extension line of the third side 32 is ∠e3, wherein ∠e3=55°±15°. That is, the angle range of ∠e3 is 40° to 70°. The angle range of ∠e3 will affect the inclination of the third side 32 and the second side 31, and will affect the value of n to a certain extent; the smaller the angle of ∠e3, the smaller the inclination of the third side 32 and the second side 31, and the larger n; the larger the angle of ∠e3, the greater the inclination of the third side 32 and the second side 31, and the smaller n.

[0042] Please refer again Figure 4 In some embodiments of the present 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 the present embodiment, an example is taken for explanation that 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 the first sub-light-emitting unit 211 and the second sub-light-emitting unit 212 and is 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, and the second light emitting layer 2122 is 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 current is applied, under the action of the electric field, the holes generated at the anode and the electrons generated at the cathode will move, and are injected into the hole transport layer and the electron transport layer respectively, and migrate to the light-emitting layer. When the holes and electrons meet in the light-emitting layer, energy excitons are generated. After the energy excitons recombine in the light-emitting layer, they radiate energy outward mainly in the form of photons, thereby generating visible light.

[0044] The display panel 100 of the present application utilizes Tandem technology to connect multiple sub-light-emitting units in series, which can improve the life and luminous efficiency of the device. When multiple sub-light-emitting units are connected in series, when light of equal brightness needs to be emitted, the luminous power of each sub-light-emitting unit is significantly less than the luminous power of a single light-emitting unit that is not connected in series. In this way, the aging of the sub-light-emitting units can be prevented while ensuring the luminous efficiency, and the risk of brightness attenuation can be reduced. Therefore, replacing the light-emitting element in the MLP device with the light-emitting unit 21 of the present application can reduce the low brightness attenuation ratio of the MLP device. After combining the two, the overall brightness attenuation ratio of the display panel is reduced. At the same time, the partition member 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 the present application can simultaneously have a better brightness attenuation ratio and optical efficiency.

[0045] Please refer again Figure 1 In some embodiments of the present application, the light-emitting substrate 110 further includes an encapsulation layer 70, which is located on one side of the light-emitting structure layer 20 and covers the light-emitting structure layer 20, and 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, wherein 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, and 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 the present application, the light-emitting substrate 110 further includes a touch layer 80, which is located on a side of the encapsulation layer 70 away from the light-emitting structure layer 20, that is, on a 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 again Figure 1 The light extraction functional layer 120 includes a first sub-light extraction functional layer 121 and a second sub-light extraction functional layer 122. The first sub-light extraction functional layer 121 is located on one side of the light emitting substrate 110, and the second sub-light extraction functional layer 122 is located on the side of the first sub-light extraction functional layer 121 away from the light emitting substrate 110. The first sub-light extraction functional layer 121 is arranged around the prism portion 30, and the refractive index of the prism portion 30 is greater than the refractive index of the first sub-light extraction functional layer 121, and the refractive index of the prism portion 30 is the same as the refractive index of the second sub-light extraction functional layer 122.

[0048] The size of one end of the prism portion 30 close to the light-emitting substrate 110 is smaller than the size of the other end of the prism portion 30 away from the light-emitting substrate 110, and 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 be totally reflected on the second side 31 or the third side 32.

[0049] In some embodiments of the present application, the material of the prism portion 30 is the same as that of the second sub-light extraction functional layer 122, and the prism portion 30 and the second sub-light extraction functional layer 122 are integrally formed. In this way, the prism portion 30 can be formed together with the second sub-light extraction functional layer 122, and the preparation process is simple.

[0050] The second sub-light-extracting functional layer 122 is used as a planar layer.

[0051] In some embodiments of the present application, the modulus of the prism portion 30 and the second sub-light extraction functional layer 122 is greater than the modulus of the first sub-light extraction functional layer 121, and the elongation at break of the second sub-light extraction functional layer 122 of the prism portion 30 is less than the elongation at break of the first sub-light extraction functional layer 121. In this way, the longitudinal stress at the location of the prism portion 30 can be reduced and the overall mechanical properties can be improved. That is, the display panel provided by the present application can have a better brightness attenuation ratio, optical efficiency and mechanical properties at the same time.

[0052] See also Figure 6 The present 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 function layer 120 does not include the first sub-light emitting function layer 121, but only includes the second sub-light emitting function layer 122, the second sub-light emitting function layer 122 is connected to the light emitting surface of the light emitting substrate 110 and covers the prism part 30, and the refractive index of the prism part 30 is greater than the refractive index of the second sub-light emitting function layer. The size of the end of the prism part 30 close to the light emitting substrate 110 along the second direction X is greater than the size of the end of the prism part 30 away from the light emitting substrate 110 along the second direction X, and a part of the light emitted by the light emitting structure layer 20 can be incident on the second side edge 31 or the third side edge 32 and can be refracted on the second side edge 31 or the third side edge 32.

[0053] In this embodiment, a cross section of the prism portion 30 along a plane parallel to the first direction Z and the second direction X is in a right trapezoidal shape.

[0054] See also Figure 7The present 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 material of the prism portion 30 is the same as that of 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 is the same as that of the touch layer 80 and is greater than the refractive index of the second sub-light emitting functional layer 122. In this way, the prism portion 30 can be formed together with the touch layer 80, and the preparation process is simple. Accordingly, the second sub-light emitting functional layer 122 can be manufactured first, and then the touch layer 80 and the prism portion 30 can be manufactured.

[0055] See also Figure 8 The present application also provides a display device 1000, which includes the display panel 100 / 200 / 300 as described above. The display device can be an electronic product such as a smart bracelet, a smart watch, a smart phone, a tablet computer, a laptop computer, a desktop computer, a television, etc.

[0056] The display panel and display device provided by the present 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 in the pixel opening; the light-emitting function layer is located on the light-emitting side of the light-emitting substrate; wherein the light-emitting structure layer includes stacked and serially connected light-emitting units, the light-emitting function layer includes a prism portion, and the prism portion is opposite to the light-emitting structure layer. Compared with a simple micro-prismatic display device, the present application combines the Tandem display technology (the light-emitting structure layer includes stacked and serially connected light-emitting units) with the MLP display technology (prism portion), and utilizes the low brightness attenuation ratio of the Tandem display technology to reduce the overall brightness attenuation ratio of the display panel.

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

[0058] In addition, the prism part is integrally formed with the second sub-light extraction functional layer, the modulus of the prism part is greater than the modulus of the first sub-light extraction functional layer, and the breaking elongation of the prism part is less than the breaking elongation of the first sub-light extraction functional layer. In this way, the longitudinal stress at the location of the prism part can be reduced, and the overall mechanical properties can be improved.

[0059] In summary, although the present application has been disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. A display panel, characterized in that: include: A light-emitting substrate, comprising a pixel definition layer and a light-emitting structure layer; The pixel definition layer has a pixel opening, the light emitting structure layer includes a plurality of light emitting units, one of the light emitting units is located in one of the pixel openings; one of the light emitting units includes a plurality of sub-light emitting units that are stacked and connected in series with each other; the light emitting substrate also includes a partition, the partition is arranged on the pixel definition layer and is located on one side of the light emitting unit, and the light emitting structure layer is disconnected at the partition; the partition includes a first side edge that is tilted relative to the light emitting substrate; the pixel opening includes a side wall that is tilted relative to the light emitting substrate; and A light-exiting functional layer is located on the light-exiting side of the light-emitting substrate; the light-exiting functional layer includes a prism portion, the prism portion is opposite to the pixel opening position; the prism portion includes a second side edge that is tilted relative to the light-emitting substrate; Among them, 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 side wall 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 side wall of the pixel opening.

2. The display panel according to claim 1, wherein: The dimension of one end of the partition member connected to the pixel definition layer is smaller than the dimension of one end of the partition member away from the pixel definition layer; the first side edge is disposed adjacent to the second side edge; 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 according to claim 2, wherein: The size of one end of the prism portion close to the light-emitting substrate is larger or smaller than the size of one end of the prism portion away from the light-emitting substrate; When the size of the end of the prism portion close to 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 can be totally reflected on the second side; When the dimension of the prism portion at one end close to the light emitting substrate is larger than the dimension of the prism portion at one end 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 according to claim 2, wherein: The light-emitting substrate further comprises a substrate and an anode, wherein the anode is located on the substrate; the pixel definition layer covers at least a portion of the anode, and at least a portion of the anode is connected to the light-emitting unit located in the pixel opening; the light-emitting substrate and the light-emitting function 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 comprises a first prism end and a second prism end, and the size of the first prism end is smaller than the size of the second prism end; The orthographic projection of the pixel opening on the substrate has an inner boundary and an outer boundary, the inner boundary is far away from the orthographic projection of the partition member on the substrate, and the outer boundary is close to the orthographic projection of the partition member on the substrate; The vertical distance from the orthographic projection of the end of the first side of the partition away from the base on the base to the inner boundary is n, and the vertical distance from the orthographic projection of the end of the second side intersecting with the first prism end on the base to the inner boundary is m; The vertical distance between the orthographic projection of one end of the second side that intersects with the second prism end on the substrate and the orthographic projection of one end of the second side that intersects with the first prism end on the substrate is a; Among them, m is less than n, m is greater than 0; 0≤m+a≤2μm.

5. The display panel according to claim 2, wherein: The partition member further includes a first surface and a second surface, the first surface is connected to the first side and to the pixel definition layer, the second surface is connected to the first side and faces away from the first surface; the prism portion further includes a third side, the third side and the second side are arranged 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 line of the second side and the extension line 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°。 6. The display panel according to claim 1, wherein: The light-emitting substrate further comprises an encapsulation layer, the encapsulation layer 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, and 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 envelops the partition member, and the first inorganic film layer is continuous at the partition member.

7. The display panel according to claim 6, wherein: The light-emitting substrate further includes a touch layer, and the touch layer is located on a side of the packaging layer away from the light-emitting structure layer; the prism portion is in contact with the touch layer; and / or The light extraction functional layer comprises a second sub-light extraction functional layer, the second sub-light extraction functional layer is located at the light extraction side of the light emitting substrate and covers the prism part; the refractive index of the prism part is greater than the refractive index of the second sub-light extraction functional layer; The material of the prism portion is the same as that of the touch layer, and the prism portion is integrated with the touch layer.

8. The display panel according to any one of claims 1 to 6, characterized in that: The light extraction functional layer includes a first sub-light extraction functional layer and a second sub-light extraction functional layer, wherein the first sub-light extraction functional layer is located on one side of the light emitting substrate, and the second sub-light extraction functional layer is located on a side of the first sub-light extraction functional layer away from the light emitting substrate; Wherein, the first sub-light extraction functional layer is arranged around the prism portion, and the refractive index of the prism portion is greater than the refractive index of the first sub-light extraction functional layer; The material of the prism portion is the same as that of the second sub-light extraction functional layer, and the prism portion and the second sub-light extraction functional layer are integrally formed; and / or The modulus of the prism part and the second sub-light extraction functional layer is greater than the modulus of the first sub-light extraction functional layer, and the breaking elongation of the prism part and the second sub-light extraction functional layer is less than the breaking elongation of the first sub-light extraction functional layer.

9. The display panel according to any one of claims 1 to 6, characterized in that: The light extraction functional layer comprises a second sub-light extraction functional layer, wherein the second sub-light extraction functional layer is located at the light extraction side of the light emitting substrate and covers the prism part; Wherein, the refractive index of the prism portion is greater than the refractive index of the second sub-light-extracting functional layer.

10. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 9.

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