Full-color display array substrate, manufacturing method and display device

Abstract

This invention discloses a full-color display array substrate, a manufacturing method, and a display device. One embodiment of the full-color display array substrate includes: a first array substrate, comprising a first substrate and a first light-emitting unit disposed on the first substrate; and a second array substrate disposed opposite to the first array substrate, comprising a second substrate and a second light-emitting unit disposed on the second substrate, the second substrate emitting a different color than the first light-emitting unit, wherein the first substrate and the second substrate are arranged parallel to each other along the light emission direction of the second light-emitting unit. The technical solution of this invention, by disposing the first array substrate and the second array substrate on different substrates, enables the first array substrate and the second array substrate to be disposed opposite to each other, achieving full-color display, avoiding damage to the first array substrate and the second array substrate during processing, and improving the service life and display quality of the full-color display array substrate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display. More particularly, it relates to a full-color display array substrate, a manufacturing method and a display device. BACKGROUND

[0002] An organic electroluminescent display device (OLED) has advantages of self-illumination, wide viewing angle, high contrast and the like. However, current OLED display devices have problems of unbalanced resolution and service life, thereby reducing the quality of OLED display screens. Therefore, how to improve the light-emitting performance of display devices, especially the light-emitting life, is a problem to be solved for current display devices. SUMMARY

[0003] The present application aims to provide a full-color display array substrate, a manufacturing method and a display device to solve at least one of the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] The present application provides a full-color display array substrate in the first aspect, comprising:

[0006] A first array substrate comprising a first substrate and a first light-emitting unit disposed on the first substrate;

[0007] A second array substrate disposed in a cell-to-cell manner with the first array substrate, comprising a second substrate and a second light-emitting unit of a light-emitting color different from the first light-emitting unit disposed on the second substrate,

[0008] Wherein, the first substrate and the second substrate are disposed in parallel along the light-emitting direction of the second light-emitting unit.

[0009] Further, the direction from the side of the second substrate away from the second light-emitting unit to the side of the second substrate close to the second light-emitting unit is the light-emitting direction of the second light-emitting unit.

[0010] The first substrate is disposed on the surface of the second substrate close to the second light-emitting unit.

[0011] Further, the first array substrate comprises a first driving circuit layer disposed on the first substrate for driving the first light-emitting unit.

[0012] The second array substrate comprises a second driving circuit layer disposed on the second substrate for driving the second light-emitting unit.

[0013] Wherein, the projection of the first driving circuit layer on the second substrate and the projection of the second light-emitting unit on the second substrate do not overlap.

[0014] Further, the first light emitting units are arranged in a first direction with a first preset interval, and the first light emitting units are arranged in a second direction perpendicular to the first direction with a second preset interval, the second preset interval being at least greater than one side length of a projection of the second light emitting unit on the second substrate;

[0015] The second light emitting units are arranged in the first direction with the first preset interval, and the first light emitting units are arranged in the second direction perpendicular to the first direction with a third preset interval, the third preset interval being at least greater than one side length of a projection of the first light emitting unit on the first substrate.

[0016] Further, a projection formed by the second preset interval and a length of arrangement of the first light emitting units in the first direction covers a projection of the second light emitting unit on the first substrate.

[0017] A projection formed by the third preset interval and a length of arrangement of the second light emitting units in the first direction covers a projection of the first light emitting unit on the second substrate.

[0018] Further, each of the first light emitting units comprises a red light emitting unit and a green light emitting unit.

[0019] Each of the second light emitting units is independently encapsulated, and the second light emitting unit comprises a blue light emitting unit.

[0020] Further, the first array substrate is a bottom emission organic electroluminescence array substrate, or a top emission organic electroluminescence array substrate or a quantum dot electroluminescence array substrate.

[0021] The second array substrate is a light emitting diode array substrate or a micro light emitting diode array substrate.

[0022] Further, the second array substrate further comprises: a filling layer covering the second driving circuit layer and covering the second light emitting unit arranged on the second substrate.

[0023] Or

[0024] The second array substrate further comprises:

[0025] A shielding layer arranged on the second driving circuit layer and surrounding the second light emitting unit.

[0026] Further, the first substrate or the second substrate is a flexible substrate.

[0027] The first array substrate further comprises an encapsulation layer covering the first light emitting unit, and the encapsulation layer comprises at least two inorganic layers.

[0028] The second aspect of the present application provides a method for manufacturing the full-color display array substrate of the first aspect of the present application, comprising: forming the first array substrate, the first array substrate comprising a first substrate and first light-emitting units arranged on the first substrate;

[0029] forming a second array substrate arranged in a cell with the first array substrate, the second array substrate comprising a second substrate and second light-emitting units arranged on the second substrate, the second light-emitting units being different from the first light-emitting units in light-emitting color, wherein the first substrate and the second substrate are arranged in parallel along the light-emitting direction of the second light-emitting units;

[0030] The first array substrate and the second array substrate are arranged in a cell. The third aspect of the present application provides a display device comprising the full-color display array substrate of the first aspect of the present application.

[0031] The present application has the following beneficial effects:

[0032] The technical solution of the present application arranges the first array substrate and the second array substrate on different substrates, so that the first array substrate and the second array substrate of the full-color display array substrate are arranged in a cell, realize full-color display of the array substrate, avoid damage to the first array substrate and the second array substrate during processing, and improve the service life and display quality of the full-color display array substrate. BRIEF DESCRIPTION OF DRAWINGS

[0033] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0034] Figure 1 FIG. 1 shows a structural schematic diagram of a full-color display array substrate according to an embodiment of the present application;

[0035] Figure 2 FIG. 2 shows a schematic diagram of the arrangement of first light-emitting units of a first array substrate according to an optional embodiment of the present application;

[0036] Figure 3 FIG. 3 shows a schematic diagram of the arrangement of second light-emitting units of a second array substrate according to an optional embodiment of the present application;

[0037] Figure 4 FIG. 4 shows a schematic diagram of the overall arrangement of light-emitting units of a full-color display array substrate according to an embodiment of the present application; Figure 3 and Figure 2 FIG. 5 shows a schematic diagram of the overall arrangement of light-emitting units of a full-color display array substrate according to an optional embodiment of the present application;

[0038] Figure 5 FIG. 6 shows a structural schematic diagram of a first array substrate according to an optional embodiment of the present application;

[0039] Figure 6 FIG. 7 shows a structural schematic diagram of a second array substrate according to an optional embodiment of the present application;

[0040] Figure 7 A structure diagram of a second array substrate showing another optional embodiment of the present application;

[0041] Figure 8a A structure diagram of a bottom emission structure showing an optional embodiment of the present application;

[0042] Figure 8b A structure diagram of a top emission structure showing an optional embodiment of the present application;

[0043] Figure 9 A structure diagram of a full-color display array substrate showing another optional embodiment of the present application;

[0044] Figure 10 A flow diagram of manufacturing a display substrate showing another embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the present application, the present application will be further described below in conjunction with embodiments and drawings. In the drawings, similar components are denoted by the same reference numerals. It should be understood by those skilled in the art that the specific description below is illustrative rather than limiting, and should not limit the scope of protection of the present application.

[0046] In the related art, the red light-emitting device and the green light-emitting device of the OLED display device have high efficiency and long service life. In contrast, the efficiency and service life of the blue light-emitting device are relatively low, which is a short board in the OLED full-color display. The T95 life of the printed red and green devices can reach 2000+h, while the T95 of the printed blue device is only 200+h under 1000 nit brightness. There is a scheme in the related art that uses OLED display devices and LED display devices to jointly realize full-color display, but the display effect and manufacturing efficiency of the full-color display device of the scheme are not ideal. For this problem, the inventors have found through research and experiments that the main reason for this problem is that the OLED and the LED in the related art are prepared on the same substrate, but since the process of the two display devices is not the same, after the LED array is manufactured, the OLED array preparation (evaporation or printing) can be carried out only after the cleaning process, and the cleaning process will cause damage to the aforementioned completed LED array, resulting in low display function, product quality and manufacturing yield of the display device. Therefore, the present application provides a full-color display array substrate, a manufacturing method and a display device to solve the above problems.

[0047] As shown in Figure 1 The first embodiment of the present application provides a full-color display array substrate, comprising:

[0048] The first array substrate 10 comprises a first substrate 11 and a first light-emitting unit 12 arranged on the first substrate 11.

[0049] The second array substrate 20 arranged in a cell with the first array substrate 10 comprises a second substrate 21 and a second light-emitting unit 22 arranged on the second substrate 21, which is different from the light-emitting color of the first light-emitting unit 12,

[0050] In the light-emitting direction of the second light-emitting unit 22, the first substrate 11 and the second substrate 21 are arranged in parallel, that is, the first substrate 11 and the second substrate 21 are arranged in parallel with a certain distance.

[0051] The technical solution of the present application is to arrange the first array substrate 10 and the second array substrate 20 on different substrates, that is, to form the first array substrate 10 on the first substrate 11 and the second array substrate 20 on the second substrate 21, so that the first array substrate 10 and the second array substrate 20 of the full-color display array substrate are arranged in a cell, the first light-emitting unit 12 and the second light-emitting unit 22 are arranged on the first substrate 11 and the second substrate 21 respectively, and the full-color display of the array substrate is realized after the cell. The first array substrate 10 and the second array substrate 20 can be processed respectively, avoiding damage to the other array substrate caused by the process of processing one of the array substrates, and improving the service life and display quality of the full-color display array substrate.

[0052] In an optional embodiment, the first substrate 11 or the second substrate 21 is a flexible substrate. Taking the first array substrate 10 as an OLED array substrate and the second array substrate 20 as a MicroLED array substrate as an example, compared with the scheme in the related art in which the first array substrate 10 and the second array substrate 20 are formed on the same substrate, the MicroLED array substrate needs to be completed first, then the substrate is cleaned, and then the OLED is manufactured. In this process flow, the later OLED preparation will cause damage to the former MicroLED, reducing the yield. The cell structure of the present embodiment can manufacture the two substrates respectively, and there is no manufacturing sequence. This setting can not only improve the manufacturing efficiency of the full-color display array substrate, but also avoid damage caused by process differences, thereby improving the product yield.

[0053] Further, in the related art, due to the limitation that the first array substrate and the second array substrate are formed on the same substrate, in order to improve the strength of the first array substrate and the second array substrate in the process, the substrate is a rigid substrate with a certain strength. However, in the present embodiment, Figure 1As shown, based on the first array substrate 10 and the second array substrate 20 being a cell-to-cell structure, different array substrates are formed on the first substrate 11 and the second substrate 21. The two substrates can be fabricated separately through process technology, and the strength requirements of the substrates are relatively small. Therefore, the first substrate 11 or the second substrate 21 in this embodiment can be a flexible substrate to realize the flexible display of the full-color display array substrate. Furthermore, the thickness of the flexible substrate is relatively thin, which can further reduce the overall thickness of the full-color display array substrate.

[0054] For example, the conventional thickness of a rigid substrate is 500 μm, while the thickness of the flexible first substrate 11 or the second substrate 21 in this embodiment is 10 μm. Thus, the thickness of the flexible full-color display array substrate in this embodiment is greatly reduced while ensuring overall strength, flexible display and display quality.

[0055] It is worth noting that the present invention does not limit whether the first substrate 11 or the second substrate 21 must be a flexible substrate. That is, those skilled in the art can choose the first substrate 11 as a flexible substrate, or the second substrate 21 as a flexible substrate, or both the first substrate 11 and the second substrate 21 as flexible substrates, which will not be elaborated here.

[0056] In an optional embodiment, such as Figure 1 As shown, the direction from the side of the second substrate 21 away from the second light-emitting unit 22 to the side closer to the second light-emitting unit 22 is the light-emitting direction of the second light-emitting unit 22;

[0057] The first substrate 11 is disposed on the surface of the second substrate 21 on the side close to the second light-emitting unit 22.

[0058] In this embodiment, the first array substrate 10 and the second array substrate 20 are formed on different substrates. In the stacking direction, the first array substrate 10 is disposed above the second array substrate 20, that is, the first substrate 11 is disposed above the second substrate 21. Each film layer of the second array substrate 20 is disposed on the second substrate 21, and each film layer of the second array substrate 20 is disposed on the first substrate 11. In this embodiment, the first array substrate 10 and the second array substrate 20 have the same light emission direction. The light emission direction of the second light-emitting unit 22 is from the side of the second substrate 21 away from the second light-emitting unit 22 to the side closer to the second light-emitting unit 22. That is, the stacking direction of each film layer of the second array substrate 20 is the same as the light emission direction of the first array substrate 10, so that both the first light-emitting unit 12 and the second light-emitting unit 22 can emit light in the same direction, thereby realizing full-color display.

[0059] Among related technologies, micro light-emitting diode (MicroLED) display devices have received increasing attention. MicroLEDs are made based on inorganic semiconductors, so they have excellent performance in terms of luminous efficiency and lifespan. For example, MicroLEDs based on inorganic materials can easily achieve a lifespan of 50,000+ hours. However, due to the immaturity of mass transfer technology, the cost of MicroLED technology is currently high.

[0060] In an optional embodiment, such as Figure 1 As shown, in this embodiment, the first array substrate 10 is a bottom-emitting organic light-emitting diode (OLED) array substrate, and the second array substrate 20 is a micro-light-emitting diode (MicroLED) array substrate.

[0061] This embodiment uses a combination of OLED and MicroLED. Based on the aforementioned avoidance of damage to the array substrate by the process through the cell structure, the first light-emitting unit 12 is displayed using OLED, which can reduce the manufacturing cost of using MicroLED alone, greatly reduce the number of times MicroLED mass transfer is performed, and reduce cost utilization. The second light-emitting unit 22 is displayed using MicroLED, which can effectively improve the display quality and lifespan, and further improve the product yield.

[0062] In an optional embodiment, each of the first light-emitting units 12 includes a red light-emitting unit R and a green light-emitting unit G; the second light-emitting unit 22 includes a blue light-emitting unit B, and each of the second light-emitting units 22 is independently packaged. For example, the independently packaged second light-emitting units 22 can be disposed on the second substrate 21 using mass transfer technology. For example, the red light-emitting unit is a red sub-pixel, the green light-emitting unit is a green sub-pixel, and the second light-emitting unit 22 is a blue light-emitting diode.

[0063] Based on the aforementioned research, and considering the shortcomings in efficiency and lifespan of blue light-emitting units in OLED displays, this embodiment employs red light-emitting units R and green light-emitting units G with longer lifespans on the first array substrate 10, and blue light-emitting units on the MicroLED array substrate. By utilizing the long lifespan of the blue light-emitting units on the MicroLED array substrate, the shortcomings in efficiency and lifespan of the blue light-emitting devices on the OLED array substrate are effectively compensated. This results in the red light-emitting units R and G on the first array substrate 10, as well as the blue light-emitting unit B on the second array substrate 20, all having high luminous efficiency and lifespan, thereby achieving excellent display performance of the full-color display array substrate.

[0064] Because blue light-emitting units have a shorter lifespan than red and green light-emitting units, OLED displays often employ pixel arrangements such as delta, diamond, and pearl arrangements. These arrangements increase the lifespan of blue pixels by increasing their area, but this sacrifices some resolution. For example, the equivalent resolution of delta, diamond, and pearl pixel arrangements is only 66.7% and 79.5% of that of the standard (Real) RGB arrangement, respectively. Furthermore, these special pixel arrangements can cause issues such as jagged edges and greenish edges on OLED displays, thus reducing their overall quality. Therefore, improving the luminous performance of blue pixels, especially their lifespan, is crucial for enhancing screen display quality.

[0065] Considering the above problems, this embodiment of the invention, based on the aforementioned first array substrate 10 and second array substrate 20 employing a box structure, further designs the arrangement structure of the first light-emitting unit 12 and the second light-emitting unit 22. In an optional embodiment, such as Figure 2 As shown, the first light-emitting units 12 are arranged sequentially in a first direction at a first preset interval L1, and the first light-emitting units 12 are arranged sequentially in a second direction perpendicular to the first direction at a second preset interval L2. The second preset interval L2 is at least greater than one side length of the projection of the second light-emitting units 22 on the second substrate 21.

[0066] like Figure 2 As shown, in this embodiment, the first direction is the Y direction and the second direction is the X direction. In this embodiment, the first light-emitting unit 12 includes a red light-emitting unit R and a green light-emitting unit G, i.e., a red sub-pixel R and a blue sub-pixel G. The red light-emitting unit R and the green light-emitting unit G are disposed on the first array substrate (OLED array substrate) 10, as shown. Figure 2 In the top view shown, the first direction is the vertical direction, and the second direction is the horizontal direction perpendicular to the vertical direction. In the vertical direction, a plurality of first light-emitting units 12 are closely arranged, and the interval between adjacent first light-emitting units 12 is a first preset interval, for example, the first preset interval is 10um.

[0067] like Figure 2As shown, in the first direction Y, there are red sub-pixels R arranged in a column and green sub-pixels G arranged in a column to one side of the red sub-pixels R. In a specific example, in the second direction X, the interval between the red sub-pixels R and the green sub-pixels G is a first preset interval L1, which realizes the uniform distribution of red sub-pixels R and green sub-pixels G in the first direction Y and the second direction X, thereby improving the overall display uniformity of the display substrate.

[0068] In this embodiment, the first light-emitting units 12 are arranged at a first preset interval L1 in the vertical direction Y and at a second preset interval L2 in the horizontal direction X. In this embodiment, the distance between two adjacent first light-emitting units 12 in the second direction X is set as the second preset interval L2. This second preset interval L2 is at least greater than one side length of the projection of the second light-emitting unit 22 onto the second substrate 21, so that the second light-emitting unit 22 can be positioned at the second preset interval L2, avoiding structural misalignment and color crosstalk between the first and second light-emitting units 12. For example, the second preset interval is 50 μm.

[0069] In an optional embodiment, the projection formed by the second preset interval L2 and the arrangement length of the first light-emitting unit 12 in the first direction Y covers the projection of the second light-emitting unit 22 on the first substrate 11. For example... Figure 2 As shown, the length of the arrangement of the first light-emitting unit 12 in the first direction is taken as the long side, and the second preset interval L2 is taken as the wide side. A preset second light-emitting unit setting area is formed according to the long side and the wide side. The preset second light-emitting unit setting area is formed between adjacent first light-emitting units 12. According to this setting, in the second direction, the arrangement of the first light-emitting unit 12 and the second light-emitting unit 22 is such that the first light-emitting unit 12 and the second light-emitting unit 22 are alternately arranged.

[0070] For example, the second preset interval L2 is twice the sum of the first preset interval L1 and the horizontal boundary of the projection of the second light-emitting unit 22 onto the first substrate 11, such as... Figure 2 As shown, the projection of the second light-emitting unit 22 on the first substrate 11 includes a horizontal boundary parallel to the second direction and a vertical boundary perpendicular to the first direction. In order to make the second light-emitting unit 22 positioned in the middle of adjacent light-emitting units, the distance between the second light-emitting unit 22 and the first light-emitting unit 12 adjacent on one side and the distance between the second light-emitting unit 22 and the first light-emitting unit 12 adjacent on the other side are consistent. Furthermore, in order to achieve the overall light emission uniformity of the first light-emitting unit 12 and the second light-emitting unit 22, the distance between the second light-emitting unit 22 and the first light-emitting unit 12 adjacent on one side is the same as the distance between the red sub-pixel R and the green sub-pixel G in the first direction, that is, the same as the first preset distance. On the basis of achieving full-color display, the display quality is further ensured.

[0071] In an optional embodiment, such as Figure 3 As shown, the second light-emitting unit 22 is arranged sequentially in the first direction at the first preset interval L1, and the first light-emitting unit 12 is arranged sequentially in the second direction X perpendicular to the first direction Y at the third preset interval L3. The third preset interval L3 is at least greater than one side length of the projection of the first light-emitting unit 12 on the first substrate 11.

[0072] In this embodiment, as Figure 3 As shown, the second light-emitting unit 22 includes blue light-emitting diodes B, which are arranged in an array in the first direction Y. For example, the spacing between adjacent blue light-emitting diodes B in the first direction Y is the same as the first preset spacing L1. This arrangement makes the blue light-emitting diodes B have the same arrangement as the red sub-pixels R and green sub-pixels G in the first light-emitting unit 12 in the first direction, so as to achieve uniform distribution in the first direction Y and the second direction X.

[0073] In the second direction X, this embodiment sets the distance between two adjacent second light-emitting units 22 in the second direction X as a third preset interval L3. The third preset interval L3 is at least greater than one side length of the projection of the first light-emitting unit 12 on the first substrate 11, so that the first light-emitting unit 12 can be set at the third preset interval L3, avoiding structural misalignment and color crosstalk between the first light-emitting unit 12 and the second light-emitting unit 22.

[0074] In an optional embodiment, the projection formed by the third preset interval L3 and the arrangement length of the second light-emitting unit 22 in the first direction covers the projection of the first light-emitting unit 12 on the second substrate 21.

[0075] like Figure 3 As shown, the length of the arrangement of the second light-emitting unit 22 in the first direction Y is taken as the long side, and the third preset interval L3 is taken as the wide side. A preset first light-emitting unit setting area is formed according to the long side and the wide side. The preset first light-emitting unit setting area is formed between adjacent second light-emitting units 22. According to this setting, in the second direction X, the arrangement of the second light-emitting unit 22 and the first light-emitting unit 12 is such that the first light-emitting unit 12 and the second light-emitting unit 22 are alternately set to achieve full-color display.

[0076] For example, the third preset interval L3 is twice the sum of the first preset interval L1 and the horizontal boundary of the projection of the first light-emitting unit 12 onto the first substrate 11. In a specific example, the horizontal boundary of the projection of the first light-emitting unit 12 onto the first substrate 11 is the sum of the width of the red sub-pixel R in the second direction X, the width of the green sub-pixel G in the second direction X, and the interval between the red sub-pixel R and the green sub-pixel G. The above-mentioned relationship setting regarding the third preset interval L3 enables the first light-emitting unit 12 to be positioned in the middle between adjacent second light-emitting units 22 after cell assembly, achieving overall light emission uniformity of the first light-emitting unit 12 and the second light-emitting unit 22.

[0077] In a specific example, the projections formed on the second substrate 21 by the first light-emitting unit 12 and the second light-emitting unit 22 are as follows: Figure 4 As shown, red sub-pixels R, green sub-pixels G, and blue LEDs B are arranged sequentially in the first direction, with the spacing between adjacent sub-pixels or adjacent blue LEDs being a first preset spacing L1. In the second direction X, red sub-pixels R, green sub-pixels G, and blue LEDs B are arranged sequentially in the same order, with the distance between adjacent sub-pixels or between adjacent sub-pixels and blue LEDs also being the first preset spacing L1. The entire array substrate achieves a standard sub-pixel arrangement, avoiding resolution loss issues caused by special pixel designs, effectively improving the display effect, increasing resolution, and achieving good full-color display.

[0078] In a specific example, such as Figure 2 , Figure 3 as well as Figure 4 As shown, in this embodiment, the blue light-emitting diode B, the red sub-pixel R, and the green sub-pixel G are all rectangular. The projection area of ​​each blue light-emitting diode B, each red sub-pixel R, and each green sub-pixel G on the second substrate 21 is the same, further realizing the standard pixel arrangement under full-color display.

[0079] In an optional embodiment, such as Figure 5 As shown, the first array substrate 10 includes:

[0080] A first driving circuit layer 13 for driving the first light-emitting unit 12 is disposed on the first substrate 11; and

[0081] An encapsulation layer 14 covers the first light-emitting unit 12, and the encapsulation layer 14 includes at least two inorganic layers.

[0082] For example, the first driving circuit layer 13 includes a thin-film driving TFT that drives the red sub-pixel and the green sub-pixel in the first light-emitting unit 12 to emit light. In a specific example, the thin-film driving TFT of the red sub-pixel and the thin-film driving TFT of the green sub-pixel are disposed in the same layer, that is, they can be formed on the first substrate 11 by the same process to drive the first light-emitting unit 12 to emit light.

[0083] In this embodiment, as Figure 1 He Ru Figure 5 As shown, the first light-emitting unit 12 is disposed on the first driving circuit layer 13. A first pixel delimiting layer 15 for defining red and green sub-pixels is disposed on the first driving circuit layer 13. The red sub-pixel R and the green sub-pixel G are formed at the opening formed by the first pixel delimiting layer 15. In a specific example, the first array substrate 10 does not form the first pixel delimiting layer 15 at the projection location of the second light-emitting unit 22 on the first substrate 11, i.e., as shown... Figure 1 and Figure 5 As shown, in the light emission direction, the light emitted by the second light-emitting unit 22 only passes through the first substrate 11 and the encapsulation layer 14. At the light emission position of the second light-emitting unit 22, the first pixel defining layer 15 is not formed on the first array substrate 10, thereby improving the light transmittance of the second light-emitting unit 22, further improving the luminous efficiency, and thus improving the display quality.

[0084] In this embodiment, the encapsulation layer 14 includes at least two inorganic layers. For example, the encapsulation layer 14 is a stacked structure of inorganic layers, organic layers, and another inorganic layer stacked sequentially. This structure can prevent the intrusion of external water and oxygen. In an optional embodiment, the organic layer can be omitted from the encapsulation layer 14, reducing its thickness while maintaining encapsulation performance, thereby reducing the overall thickness of the array substrate. In a specific example, the encapsulation layer 14 can be thinned to 10 μm.

[0085] In an optional embodiment, such as Figure 6 As shown, the second array substrate 20 includes a second driving circuit layer 23 disposed on the second substrate 21 for driving the second light-emitting unit 22. In this embodiment, the second driving circuit layer 23 includes a thin-film driving TFT that drives the independently packaged second light-emitting unit 22, which can be transferred to the surface of the thin-film driving TFT away from the second substrate 21 by mass packaging transfer technology.

[0086] In an optional embodiment, such as Figure 1As shown, the projection of the first driving circuit layer 13 on the second substrate 21 and the projection of the second light-emitting unit 22 on the second substrate 21 do not overlap. In this embodiment, since the first array substrate 10 and the second array substrate 20 are stacked in a peg configuration, the first driving circuit layer 13 is not placed in the light-emitting area of ​​the second light-emitting unit 22. That is, in the peg configuration, the projections of the first driving layer and the second light-emitting unit 22 do not overlap. In other words, the first driving circuit layer 13 will not block the light emitted by the second light-emitting unit 22, thereby improving the transmittance of the display substrate.

[0087] In an optional embodiment, such as Figure 6 As shown, the second array substrate 20 further includes: a filling layer 24 disposed on the second substrate 21 covering the second driving circuit layer 23 and covering the second light-emitting unit 22, wherein the filling layer 24 forms a protection for the second light-emitting unit 22. For example, the filling layer 24 is a transparent material, thereby improving the display effect of the second light-emitting unit 22.

[0088] like Figure 6 As shown, in this embodiment of the invention, the second array substrate 20 encapsulates and protects the second light-emitting unit 22 only through a filler layer 24. Based on the aforementioned use of a flexible substrate, the second array substrate 20 in this embodiment simplifies the film structure and further reduces the overall thickness of the full-color display array substrate. For example, the thickness of the filler layer 24 in this embodiment is 8 μm.

[0089] In a specific example, the thicknesses of each film layer of the first array substrate 10 and the second array substrate 20 located on the same substrate in the related art are: substrate thickness 500 μm, driving circuit layer TFT thickness 2 μm, first pixel defining layer thickness 2 μm, first light-emitting unit 12 thickness 0.5 μm, and encapsulation layer 14 thickness 15 μm, with an overall thickness of at least 519.5 μm. However, in this embodiment, through the above design, such as the flexible arrangement of the first substrate 11 or the second substrate 21, the thinning of the encapsulation layer 14, and the simplification of the layer structure of the second array substrate 20, the thicknesses of the first array substrate 10 and the second array substrate 20 in this embodiment are: first substrate 11 and second substrate 21 thickness 10 μm, filling layer 24 thickness 8 μm, driving circuit layer thickness 2 μm, encapsulation layer 14 thickness 8 μm, first pixel defining layer thickness 2 μm, first light-emitting unit 12 thickness 0.5 μm, with a total thickness of 40.5 μm, resulting in a significantly reduced overall thickness.

[0090] Considering that in a box structure, encapsulation with only the aforementioned filler layer 24 may result in color crosstalk due to large-angle light emission, in an optional embodiment, such as Figure 7As shown, the second array substrate 20 further includes a shielding layer 25 disposed on the second driving circuit layer 23 surrounding the second light-emitting unit 22.

[0091] In this embodiment, a shielding layer 25 is formed around the second light-emitting unit 22 on its side. The shielding layer 25 blocks the light emitted from the second light-emitting unit 22, reducing the light emission angle. This allows the light emitted from the second light-emitting unit 22 to exit from the opening of the shielding layer 25, thus limiting the light emission position and preventing color bleeding problems that could affect the box structure.

[0092] In an optional embodiment, the shielding layer 25 is a second pixel defining layer. This embodiment utilizes the opaque nature of the material of the second pixel defining layer to use the second pixel defining layer as the shielding layer 25. For example, the opening defined by the second pixel defining layer is located on the first substrate 11 at a position where the first pixel defining layer is not formed. That is, in this embodiment, the first substrate 11 does not have a first pixel defining layer at the position corresponding to the second light-emitting unit 22 to improve the transmittance of the second light-emitting unit 22. Furthermore, this embodiment of the invention further improves the light emission performance of the second light-emitting unit 22 and avoids color crosstalk by setting an opening of the second pixel defining layer at the position where the first pixel defining layer is not formed on the first substrate 11.

[0093] In an optional embodiment, the first array substrate 10 is a bottom-emitting organic electroluminescent array substrate, a top-emitting organic electroluminescent array substrate, or a quantum dot electroluminescent array substrate.

[0094] For example, such as Figure 8a As shown, the first array substrate 10 of this embodiment is a bottom-emitting OLED array substrate, and the structure of its first light-emitting unit 12 includes: a transparent anode 121, a hole injection layer (HIL) 122, a hole transport layer (HTL) 123, a light-emitting layer (EML) 124, an electron transport layer (ETL) 125, an electron injection layer (EIL) 126, and a metal cathode 127, which are sequentially stacked on a first substrate 11. Exemplarily, the bottom-emitting OLED array substrate can be fabricated using a full vapor deposition process, or a process combining printing and vapor deposition.

[0095] When a bottom-emitting OLED array substrate is selected in this embodiment, such as Figure 1As shown, the encapsulation layer 14 of the first array substrate 10 is close to the second array substrate 20, and the first substrate 11 of the first array substrate 10 is far away from the second array substrate 20. By utilizing the performance of the cathode of the bottom-emitting OLED array substrate as an opaque reflective device, light emitted by the light-emitting layer to the side close to the second array substrate 20 can be reflected and blocked, effectively preventing color crosstalk problems in the cell structure.

[0096] like Figure 8b As shown, the first array substrate 10 of this embodiment is a top-emitting OLED array substrate, and the structure of its first light-emitting unit 12 includes: an anode 121', a hole injection layer (HIL) 122, a hole transport layer (HTL) 123, a light-emitting layer (EML) 124, an electron transport layer (ETL) 125, an electron injection layer (EIL) 126, and a transparent cathode 127' sequentially stacked on a first substrate 11. Exemplarily, the bottom-emitting OLED array substrate can be fabricated using a full vapor deposition process, or a process combining printing and vapor deposition.

[0097] When a top-emitting OLED array substrate is selected in this embodiment, such as Figure 9 As shown, the encapsulation layer 14 of the first array substrate 10 is far from the second array substrate 20, and the first substrate 11 of the first array substrate 10 is close to the second array substrate 20. By utilizing the performance of the light source of the top-emitting OLED array substrate emitted from the top of the device, the aperture ratio of the first array substrate 10 can be effectively improved. Furthermore, by utilizing the performance of the reflective anode as an opaque reflective device, the light emitted by the light-emitting layer to the side close to the second array substrate 20 can be reflected and blocked, effectively preventing color crosstalk problems in the cell structure.

[0098] When a quantum dot light-emitting diode (QLED) array substrate is selected in this embodiment, blue light is needed to excite the red and green quantum dots to emit light. The cell-to-cell structure of the QLED array substrate and the second array substrate 20 may increase the blue light propagation path, leading to color crosstalk problems caused by large-angle light emission. In this embodiment, the light can be blocked by a shielding layer 25 surrounding the second light-emitting unit 22 on the second driving circuit layer 23, thus avoiding the color crosstalk problem caused by the cell-to-cell structure. Based on preventing color crosstalk, the high-quality display characteristics of the QLED array substrate can further improve the display effect.

[0099] In an optional embodiment, the second array substrate 20 is a light-emitting diode (LED) array substrate or a micro-light-emitting diode (MicroLED) array substrate.

[0100] In other words, depending on the different structures of the first array substrate 10 and the second array substrate 20, this embodiment can form a variety of schemes for the first array substrate 10 and the second array substrate 20 to form a pair of cells.

[0101] Taking the NTSC 1931 standard as an example, when the first array substrate 10 is an OLED array substrate and the second array substrate 20 is an LED array substrate, this solution can achieve 100% NTSC color gamut. Furthermore, when the first array substrate 10 is an OLED array substrate and the second array substrate 20 is a MicroLED array substrate, this solution can achieve 120% NTSC color gamut. Even further, when the first array substrate 10 is a QLED array substrate and the second array substrate 20 is a MicroLED array substrate, this solution can achieve 130% NTSC color gamut. The combination of various solutions in this embodiment can achieve excellent display effects and has broad application prospects.

[0102] Another embodiment of the present invention provides a method for manufacturing a display substrate as described in the above embodiments of the present invention, such as... Figure 10 As shown, the method includes:

[0103] The first array substrate 10 is formed, and the first array substrate 10 includes a first substrate 11 and a first light-emitting unit 12 disposed on the first substrate 11.

[0104] A second array substrate 20 is formed in opposition to the first array substrate 10. The second array substrate 20 includes a second substrate 21 and a second light-emitting unit 22 with a different light-emitting color than the first light-emitting unit 12 disposed on the second substrate 21. The first substrate 11 and the second substrate 21 are arranged parallel to each other along the light-emitting direction of the second light-emitting unit 22.

[0105] The first array substrate 10 and the second array substrate 20 are paired.

[0106] The method and process flow of this embodiment is simple. The two substrates are manufactured separately through the process, and there is no sequential manufacturing order. This will not cause damage to either array substrate and can avoid damage caused by differences in the process. The full-color display array substrate with a cell structure formed by this method can improve the manufacturing efficiency of the full-color display array substrate and improve the display quality.

[0107] In one specific example, forming the first array substrate 10 further includes:

[0108] A first driving circuit layer 13 is formed on the first substrate 11. Exemplarily, in this embodiment, the first driving circuit layer 13 is not disposed at the position corresponding to the second light-emitting unit 22, thereby improving the light-emitting efficiency of the second light-emitting unit 22.

[0109] A first pixel defining layer and a first light-emitting unit 12 defined by the first pixel defining layer are formed on the first driving circuit layer 13. For example, the first pixel defining layer is not formed at the position corresponding to the second light-emitting unit 22 to further improve the luminous efficiency of the second light-emitting unit 22. The arrangement of the first light-emitting units 12 can be found in the description of the full-color display array substrate of the above embodiment; the relevant principles and structures can be referenced and will not be repeated here.

[0110] An encapsulation layer 14 is formed covering the first light-emitting unit 12, the first pixel defining layer, and the first substrate 11. For example, the encapsulation layer 14 may be a two-layer inorganic structure, or a stacked structure of inorganic, organic, and inorganic components; relevant details can be found in the above embodiments.

[0111] The method and process of the first array substrate 10 in this embodiment is simple, will not damage the first array substrate 10, and has a good display effect.

[0112] In a specific example, the second array substrate 20 formed in conjunction with the first array substrate 10 includes:

[0113] A second driving circuit layer 23 is formed on the second substrate 21.

[0114] A second light-emitting unit 22 is formed on the second driving circuit layer 23. For example, the second light-emitting unit 22 can be disposed on the second driving circuit layer by mass transfer technology. The second light-emitting unit 22 is disposed between adjacent first units. The arrangement of the second light-emitting unit 22 can be referred to the description of the full-color display array substrate in the above embodiment. The relevant principles and structures can be referred to, and will not be repeated here.

[0115] In a specific example, to avoid color crosstalk issues in the box structure, the method further includes forming a shielding layer 25 on the second driving circuit layer 23 between the formation of the second light-emitting unit 22. The shielding layer 25 blocks the light, reducing the light emission angle and avoiding color crosstalk. The relevant principles and structure can be referenced, and will not be elaborated further here.

[0116] A filling layer 24 is formed to cover the shielding layer 25, the second light-emitting unit 22, and the second substrate 21.

[0117] The method and process of the second array substrate 20 in this embodiment is simple, will not damage the second array substrate 20, and has a good display effect.

[0118] Since the first array substrate 10 and the second array substrate 20 in this embodiment are formed on different substrates, in a specific example, the material layers of the first substrate 11 and the second substrate 21 can be formed on the same substrate in the same process, which further saves the manufacturing process of the first array substrate 10 and the second array substrate 20.

[0119] In another specific example, the first driving circuit layer 13 and the second driving circuit layer 23 can also be formed on the first substrate 11 and the second substrate 21 respectively in the same process. In another specific example, while forming the first pixel delimiting layer on the first driving circuit layer 13, the second pixel delimiting layer as a shielding layer 25 can also be formed on the second driving circuit layer 23 in the same process, thereby further improving the overall process flow of the full-color display array display substrate.

[0120] The principles, processes, and related aspects of the methods in this embodiment can be referred to the full-color display array substrate in the above embodiments, and will not be repeated here.

[0121] Another embodiment of the present invention provides a display device, including the display substrate of the above embodiments of the present invention. The display device can be any product or component that requires a backlight, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, navigator, vehicle central control gear lever, and e-ink screen. The embodiments of the present invention do not limit this.

[0122] It should also be noted that in the description of this invention, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0123] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A full-color display array substrate, characterized in that, Comprise: A first array substrate comprising a first substrate and first light-emitting units disposed on the first substrate; A second array substrate disposed opposite the first array substrate, comprising a second substrate and second light-emitting units of a light-emitting color different from the first light-emitting units disposed on the second substrate, Wherein, in the light-emitting direction of the second light-emitting units, the first substrate and the second substrate are disposed in parallel; Each of the first light-emitting units comprises a red light-emitting unit and a green light-emitting unit; The second light-emitting units comprise blue light-emitting units; The first array substrate is a bottom-emission organic electroluminescent array substrate, a top-emission organic electroluminescent array substrate, or a quantum dot electroluminescent array substrate; The second array substrate is a light-emitting diode array substrate or a micro light-emitting diode array substrate; The first array substrate comprises a first drive circuit layer disposed on the first substrate for driving the first light-emitting units; The second array substrate comprises a second drive circuit layer disposed on the second substrate for driving the second light-emitting units; Wherein, the projection of the first drive circuit layer on the second substrate and the projection of the second light-emitting units on the second substrate do not overlap; The first drive circuit layer is provided with a first pixel defining layer, and the red light-emitting units and the green light-emitting units are formed at the openings formed by the first pixel defining layer. At the projection of the second light-emitting units on the first substrate, the first drive circuit layer is not formed with the first pixel defining layer.

2. The array substrate according to claim 1, wherein: The light-emitting direction of the second light-emitting units is the direction from the side of the second substrate away from the second light-emitting units to the side close to the second light-emitting units; The first substrate is disposed on the surface of the second substrate close to the second light-emitting units.

3. The array substrate according to claim 2, wherein: The first light-emitting units are arranged in a first direction with a first preset interval, and the first light-emitting units are arranged in a second direction perpendicular to the first direction with a second preset interval, and the second preset interval is at least greater than one side length of the projection of the second light-emitting units on the second substrate; The second light-emitting units are arranged in the first direction with the first preset interval, and the first light-emitting units are arranged in the second direction perpendicular to the first direction with a third preset interval, and the third preset interval is at least greater than one side length of the projection of the first light-emitting units on the first substrate.

4. The array substrate according to claim 3, wherein: The projection formed by the second preset interval and the arrangement length of the first light-emitting units in the first direction covers the projection of the second light-emitting units on the first substrate; The projection formed by the third preset interval and the arrangement length of the second light-emitting units in the first direction covers the projection of the first light-emitting units on the second substrate.

5. The array substrate according to claim 3 or 4, wherein: The second array substrate further comprises a filling layer covering the second driving circuit layer and covering the second light emitting unit, which is arranged on the second substrate; Or The second array substrate further comprises: a shielding layer surrounding the second light emitting unit, which is arranged on the second driving circuit layer.

6. The array substrate according to claim 5, wherein the first substrate or the second substrate is a flexible substrate; the first array substrate further comprises an encapsulation layer covering the first light emitting unit, the encapsulation layer comprising at least two inorganic layers.

7. A method for manufacturing a full-color display array substrate, characterized in that, The method comprises: forming a first array substrate, the first array substrate comprising a first substrate and a first light emitting unit arranged on the first substrate; forming a second array substrate arranged in a cell-to-cell manner with the first array substrate, the second array substrate comprising a second substrate and a second light emitting unit arranged on the second substrate, the second light emitting unit being different from the first light emitting unit in light emitting color, wherein the first substrate and the second substrate are arranged in parallel along a light emitting direction of the second light emitting unit; cell-to-cell arranging the first array substrate and the second array substrate; each of the first light emitting units comprises a red light emitting unit and a green light emitting unit; the second light emitting unit comprises a blue light emitting unit; the first array substrate is a bottom emission organic electroluminescent array substrate, a top emission organic electroluminescent array substrate or a quantum dot electroluminescent array substrate; the second array substrate is a light emitting diode array substrate or a micro light emitting diode array substrate; the first array substrate comprises a first driving circuit layer for driving the first light emitting unit, which is arranged on the first substrate; the second array substrate comprises a second driving circuit layer for driving the second light emitting unit, which is arranged on the second substrate; wherein a projection of the first driving circuit layer on the second substrate and a projection of the second light emitting unit on the second substrate do not overlap; a first pixel defining layer is arranged on the first driving circuit layer, the red light emitting unit and the green light emitting unit are formed at an opening formed by the first pixel defining layer, and the first driving circuit layer is not provided with the first pixel defining layer at a projection of the second light emitting unit on the first substrate.

8. A display device, characterized by comprising: An array substrate as claimed in any one of claims 1 to 6.

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