Display panel and manufacturing method thereof

Abstract

The display panel and the manufacturing method thereof provided by the embodiment relate to the technical field of display. The brightness adjustment layer is arranged on the light-emitting side of the target display device which has a large difference in average brightness value from the non-target display device, so that the brightness value of the light emitted by the target display device after passing through the brightness adjustment layer is close to the average brightness value of the light emitted by the non-target display device, thereby improving the light-emitting performance difference of each display device on the display panel. Meanwhile, the above-mentioned scheme for improving the light-emitting performance difference of each display device does not affect the adjustable gray scale value range of each display device, and the color depth of each display device in the display panel can ensure the display uniformity of the display panel without being affected, thereby improving the market competitiveness of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display panel and a method for manufacturing the display panel. Background Technology

[0002] Display devices (such as Micro-LEDs) are limited by factors such as the structure of the growth equipment, manufacturing process parameters, and wafer warpage. This can lead to differences in the light-emitting performance of display devices manufactured in different areas of the wafer. After these display devices are transferred to the driver backplane to make a display panel, the brightness and color of the pixels on the display panel will be uneven, which will affect the uniformity of the display panel and reduce its market competitiveness. Summary of the Invention

[0003] In order to overcome the technical problems mentioned in the above technical background, this application provides a display panel and a method for manufacturing the display panel.

[0004] A first aspect of this application provides a display panel, including a driving backplane, a display device, and a brightness adjustment layer;

[0005] The display device is mounted on the drive backplate;

[0006] The display device includes a target display device and a non-target display device, wherein, under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device and the average brightness value of the light emitted by the non-target display device is greater than a preset first brightness difference value.

[0007] The brightness adjustment layer is disposed on the light-emitting side of the target display device. The orthographic projection of the brightness adjustment layer on the driving back plate covers the orthographic projection of the target display device on the driving back plate. Under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device after passing through the brightness adjustment layer and the average brightness value of the light emitted by the non-target display devices is less than a preset second brightness difference value. The second brightness difference value is less than the first brightness difference value.

[0008] In one possible embodiment of this application, the brightness adjustment layer includes a brightness attenuation layer;

[0009] The target display device includes a first target display device, wherein, under the same electrical signal driving action, the brightness value of the light emitted by the first target display device is greater than the average brightness value of the light emitted by the non-target display device;

[0010] The brightness attenuation layer is disposed on the light-emitting side of the first target display device.

[0011] In one possible embodiment of this application, the brightness adjustment layer includes a brightness anti-reflection layer;

[0012] The target display device includes a second target display device, wherein, under the same electrical signal driving action, the brightness value of the light emitted by the second target display device is less than the average brightness value of the light emitted by the non-target display device;

[0013] The brightness enhancement layer is disposed on the light-emitting side of the second target display device.

[0014] In one possible embodiment of this application, the brightness attenuation layer includes light-absorbing particles, and the thickness of the brightness attenuation layer is 0.1 μm to 10 μm, wherein the thickness of the brightness attenuation layer is positively correlated with the brightness value of the light emitted by the first target display device.

[0015] In one possible embodiment of this application, the brightness anti-reflection layer is a transparent spherical lens structure, and the thickness of the brightness anti-reflection layer is 1µm to 50µm, wherein the thickness of the brightness anti-reflection layer is negatively correlated with the brightness value of the light emitted by the second target display device.

[0016] A second aspect of this application provides a method for manufacturing a display panel, the method comprising:

[0017] The display device is transferred to the drive backplane and electrically connected to the drive backplane.

[0018] The display device is lit up, and target display devices and non-target display devices are selected from the display devices. Under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device and the average brightness value of the light emitted by the non-target display devices is greater than a preset first brightness difference value.

[0019] Measure the brightness offset value of the target display device and the target position coordinates of the target display device on the driving backplate;

[0020] Based on the brightness offset value and the target position coordinates, a brightness adjustment layer is made on the light-emitting side of the target display device, and the orthographic projection of the brightness adjustment layer on the driving back panel covers the orthographic projection of the target display device on the driving back panel. Under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device after passing through the brightness adjustment layer and the brightness value of the light emitted by the non-target display device is less than a preset second brightness difference value, and the second brightness difference value is less than the first brightness difference value.

[0021] In one possible embodiment of this application, the brightness adjustment layer includes a brightness attenuation layer, and the target display device includes a first target display device, wherein, under the same electrical signal driving action, the brightness value of the light emitted by the first target display device is greater than the average brightness value of the light emitted by the non-target display device; the step of fabricating the brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates includes:

[0022] The brightness attenuation layer is fabricated on the light-emitting side of the first target display device based on the brightness offset value and the target position coordinates;

[0023] The brightness adjustment layer includes a brightness anti-reflection layer, and the target display device includes a second target display device, wherein, under the same electrical signal driving action, the brightness value of the light emitted by the second target display device is less than the average brightness value of the light emitted by the non-target display device; the step of fabricating the brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates includes:

[0024] The brightness antireflection layer is fabricated on the light-emitting side of the second target display device based on the brightness offset value and the target position coordinates.

[0025] In one possible embodiment of this application, the step of fabricating a brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates further includes:

[0026] Based on the brightness offset value and the pre-stored correspondence between the brightness offset value and the thickness of the brightness adjustment layer, the target thickness of the brightness adjustment layer to be manufactured is obtained.

[0027] The nozzle of the inkjet printer is controlled to move above the target display device according to the target position coordinates, and the inkjet printer is controlled to spray and print a brightness adjustment layer of the target thickness on the target display device.

[0028] Preferably, the step of controlling the inkjet printing equipment to spray and print a brightness adjustment layer of the target thickness onto the target display device includes:

[0029] The inkjet printing equipment is controlled to perform multiple layer-by-layer spraying and printing on the target display device to obtain a brightness adjustment layer of the target thickness.

[0030] In one possible embodiment of this application, before the step of fabricating a brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates, the method includes:

[0031] Divide the brightness value offset levels into different brightness offset values;

[0032] A brightness adjustment layer array corresponding to different brightness value offset levels is prepared on a transfer plate coated with a photosensitive adhesive layer, wherein the same brightness value offset level corresponding to the same brightness value offset level is prepared on the same transfer plate.

[0033] In one possible embodiment of this application, the step of fabricating a brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates further includes:

[0034] Based on the brightness value offset level corresponding to the brightness offset value, select a brightness adjustment layer array corresponding to the brightness value offset level;

[0035] Align the selected brightness adjustment layer array with the transfer board and the driving backplane, and transfer the brightness adjustment layer at the corresponding position on the transfer board to the light-emitting side of the target display device according to the target position coordinates.

[0036] The display panel and its manufacturing method provided in this application embodiment, by setting a brightness adjustment layer on the light-emitting side of the target display where the average brightness value of the light emitted by the target display device differs significantly from that of the non-target display device, can bring the brightness value of the light emitted by the target display device after passing through the brightness adjustment layer closer to the average brightness value of the light emitted by the non-target display device, thereby improving the difference in luminous performance among the display devices on the display panel. Simultaneously, the above-mentioned solution for improving the difference in luminous performance among the display devices does not affect the adjustable grayscale range of each display device. The color depth of each display device in the display panel can be ensured without affecting the display uniformity, thus enhancing the market competitiveness of the display panel. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 The example illustrates the grayscale values ​​of each display device when electrical signal compensation makes the luminous brightness of the display devices in the display panel the same;

[0039] Figure 2 This embodiment illustrates a possible structural diagram of the display panel provided.

[0040] Figure 3This example illustrates another possible structural diagram of the display panel provided in this embodiment;

[0041] Figure 4 This example illustrates yet another structural schematic diagram of the display panel provided in this embodiment;

[0042] Figure 5 A schematic diagram illustrating another structural design of the display panel provided in this embodiment is shown.

[0043] Figure 6 A flowchart illustrating the manufacturing method of the display panel provided in this embodiment is shown.

[0044] Figure 7 The process diagram corresponding to the manufacturing method of the display panel provided in this embodiment is illustrated.

[0045] Icons: 10-Display panel; 110-Driver backplane; 120-Display device; 1201-Target display device, 12011-First target display device, 12012-Second target display device; 1202-Non-target display device; 130-Brightness adjustment layer; 1301-Brightness attenuation layer; 1302-Brightness anti-reflection layer; 140-Black matrix layer; 150-Encapsulation layer; 160-Touch function layer; 170-Adhesive layer; 180-Cover plate. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0049] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] It should be noted that, where there is no conflict, different features in the embodiments of this application can be combined with each other.

[0051] To address the technical problems in the background art, a possible solution is to use De-Mura technology to compensate for electrical signals in display devices with significant differences in brightness values. However, this solution is effective when the brightness differences between display devices in a display panel are not too large. When the brightness differences between display devices in a display panel are too large, it is difficult to improve the display uniformity problem of the display panel through electrical signal compensation. Furthermore, De-Mura technology can also limit the color depth of the corresponding display devices, for example, such as... Figure 1 As shown, when displaying the same brightness value, the grayscale values ​​of the display devices in the two dashed areas are 230 and 240, respectively, while the grayscale value of the other display devices is 255. When adjusting the grayscale value of the display devices in the display panel, the adjustable grayscale value range of the display devices in the two dashed areas is lower than that of the display devices in other locations, that is, the color depth of the display devices in the two dashed areas is limited.

[0052] To address the aforementioned technical problems, the inventors have innovatively designed the following technical solutions, which will be described in detail below with reference to the accompanying drawings. It should be noted that the deficiencies in the existing solutions are the result of the inventors' practical experience and careful research. Therefore, the discovery process of the aforementioned technical problems and the solutions proposed in this embodiment below are contributions made by the inventors to this application during the invention process, and should not be construed as technical content known to those skilled in the art.

[0053] Please refer to Figure 2 , Figure 2This embodiment provides a possible structural diagram of a display panel. The display panel 10 may include a driving backplate 110, display devices 120, and a brightness adjustment layer 130. The display devices 120 are disposed on the driving backplate 110 and electrically connected to the driving circuit in the driving backplate 110. The display devices 120 may be distributed in an array on the driving backplate 110. A black matrix layer 140 may be filled between adjacent display devices 120 to prevent crosstalk interference between display devices 120.

[0054] Display devices 120 can be divided into target display devices 1201 and non-target display devices 1202 based on the difference in brightness values ​​emitted under the same driving electrical signal. Non-target display devices 1202 are display devices 120 with basically the same brightness value. Generally, the number of non-target display devices 1202 in the display panel 10 is the majority. Each target display device 1201 is defined as having a brightness value difference between the emitted light and the average brightness value of the emitted light from the non-target display devices 1202 that is greater than a preset first brightness difference value (e.g., 10% of the average brightness value). The average brightness value of the emitted light from the non-target display devices 1202 is the ratio between the sum of the brightness values ​​of the emitted light from all non-target display devices 1202 in the display panel 10 and the number of non-target display devices 1202. Generally, the number of target display devices 1201 in the display panel 10 is the minority.

[0055] In this embodiment, the brightness adjustment layer 130 can be disposed on the light-emitting side of the target display device 1201. The orthographic projection of the brightness adjustment layer 130 on the driving back plate 110 covers the orthographic projection of the target display device 1201 on the driving back plate 110. Under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device 1201 after passing through the brightness adjustment layer 130 and the average brightness value of the light emitted by the non-target display device 1202 is less than a preset second brightness difference value (for example, 0.5% of the average brightness value). The second brightness difference value is less than the first brightness difference value.

[0056] In the above structure, a brightness adjustment layer 130 is provided on the light-emitting side of the target display device 1201, whose average brightness value differs significantly from that of the non-target display device 1202. This allows the brightness value of the light emitted by the target display device 1201 after passing through the brightness adjustment layer 130 to approach the average brightness value of the light emitted by the non-target display device 1202, thereby improving the difference in light-emitting performance among the display devices 120 on the display panel 10. Simultaneously, this method of improving the difference in light-emitting performance among the display devices 120 does not affect the adjustable grayscale range of each display device 120. The color depth of each display device 120 in the display panel 10 remains unaffected, ensuring the display uniformity of the display panel 10 and enhancing its market competitiveness.

[0057] In this embodiment, the brightness adjustment layer 130 can be directly disposed on the target display device 1201, or it can be disposed on other film layers on the light-emitting side of the target display device 1201. For example, please refer to... Figure 3 , Figure 3 This example illustrates another possible structural diagram of the display panel provided in this embodiment. The display panel 10 may further include an encapsulation layer 150, a touch function layer 160, an adhesive layer 170, and a cover plate 180. The encapsulation layer 150, touch function layer 160, adhesive layer 170, and cover plate 180 are sequentially stacked on the side of the display device 120 and the black matrix layer 140 away from the driving backplate 110, as shown in the figure. The brightness adjustment layer 130 may be disposed on the side of the touch function layer 160 facing the driving backplate 110. The above only gives one possible placement of the brightness adjustment layer 130. The brightness adjustment layer 130 may also be disposed on the side of the touch function layer 160 away from the driving backplate 110, or on the side of the cover plate 180 facing the driving backplate 110. It is understood that in other embodiments of this embodiment, the display panel 10 may also lack the touch function layer 160. In this embodiment, the brightness adjustment layer 130 may be disposed on the side of the cover plate 180 facing the driving backplate 110. In addition, besides… Figure 3 In addition to the film layer shown, optical film layers such as anti-reflective film and anti-glare film may also be provided on the side of the encapsulation layer 150 away from the drive backplate 110.

[0058] Furthermore, in this embodiment, please refer to Figure 4 , Figure 4 This embodiment provides another schematic diagram of the display panel structure. The brightness adjustment layer 130 may include a brightness attenuation layer 1301, and the target display device 1201 may include a first target display device 12011. Under the same electrical signal driving action, the brightness value of the light emitted by the first target display device 12011 is greater than the average brightness value of the light emitted by the non-target display device 1202. The brightness attenuation layer 1301 is disposed on the light-emitting side of the first target display device 12011. The brightness attenuation layer 1301 can reduce the brightness value of the light emitted by the first target display device 12011 after passing through the brightness attenuation layer 1301, thereby making the brightness value of the light emitted by the first target display device 12011 after passing through the brightness attenuation layer 1301 closer to the average brightness value of the light emitted by the non-target display device 1202.

[0059] The brightness attenuation layer 1301 may include light-absorbing particles. For example, the brightness attenuation layer 1301 may be made of a resin material mixed with light-absorbing particles, wherein the light-absorbing particles may be black particles such as ink particles, and the resin may be polyacrylate, polyethylene epoxy resin, etc. The thickness d1 of the brightness attenuation layer 1301 may be, but is not limited to, 0.1µm, 0.8µm, 1.2µm, 2.1µm, 3.2µm, 4.2µm, 5.5µm, 6.2µm, 7.6µm, 8.3µm, 9.1µm, 9.4µm, 9.7µm, and 10µm, wherein a larger thickness of the brightness attenuation layer 1301 results in a stronger ability to attenuate the brightness value. The greater the brightness value of the light emitted by the first target display device 12011, the greater the brightness value that needs to be attenuated, and correspondingly, the thickness of the brightness attenuation layer 1301 disposed on the light-emitting side of the first target display device 12011 is also greater. In this embodiment, the thickness of the brightness attenuation layer 1301 is positively correlated with the brightness value of the light emitted by the first target display device 12011.

[0060] Furthermore, in this embodiment, please refer to Figure 5 , Figure 5 In another structural schematic diagram provided in this embodiment, the brightness adjustment layer 130 may further include a brightness anti-reflection layer 1302, and the target display device 1201 may further include a second target display device 12012. Under the same electrical signal driving action, the brightness value of the light emitted by the second target display device 12012 is less than the average brightness value of the light emitted by the non-target display device 1202. The brightness anti-reflection layer 1302 is disposed on the light-emitting side of the second target display device 12012. The brightness anti-reflection layer 1302 can enhance the brightness value of the light emitted by the second target display device 12012 after passing through the brightness anti-reflection layer 1302, thereby making the brightness value of the light emitted by the second target display device 12012 after passing through the brightness anti-reflection layer 1302 close to the average brightness value of the light emitted by the non-target display device 1202.

[0061] The brightness antireflection layer 1302 can be a transparent spherical lens structure. Exemplarily, the brightness antireflection layer 1302 can be made of a resin material with added surface modifiers. The surface modifiers are used to adjust the surface tension of the resin so that a transparent spherical lens structure is formed when the brightness antireflection layer 1302 is made using this resin material. The resin can be polyacrylate, polyepoxy resin, etc. The thickness d2 of the brightness antireflection layer 1302 can be, but is not limited to, 1µm, 5µm, 11µm, 16µm, 19µm, 23µm, 26µm, 32µm, 38µm, 43µm, 45µm, 47µm, 49µm, and 50µm, etc., wherein a larger thickness of the brightness antireflection layer 1302 results in a stronger ability to enhance the brightness value. The smaller the brightness value of the light emitted by the second target display device 12012, the more brightness enhancement is required, and correspondingly, the thickness of the brightness antireflection layer 1302 disposed on the light-emitting side of the second target display device 12012 is also larger. In this embodiment, the thickness of the brightness antireflection layer 1302 is negatively correlated with the brightness value of the light emitted by the second target display device 12012.

[0062] This embodiment also provides a method for manufacturing a display panel, please refer to... Figure 6 and Figure 7 , Figure 6 A flowchart illustrating the manufacturing process of a display panel is provided. Figure 7 Example Figure 6 The corresponding manufacturing process diagram. (See below for details.) Figure 6 and Figure 7 The method for manufacturing the display panel provided in this embodiment will be described in detail.

[0063] In step S11, the display device 120 is transferred to the drive backplane 110 and electrically connected to the drive backplane 110.

[0064] In this step, the display device 120 can be transferred from the wafer to the drive backplane 110 using mass transfer technology (such as laser transfer technology) and electrically connected to the drive backplane 110.

[0065] After the above transfer is completed, the black matrix layer 140 filled between adjacent display devices 120 can be fabricated by photolithography or inkjet printing.

[0066] Step S12: Light up the display device 120 and select the target display device 1201 and non-target display devices 1202 from the display devices 120.

[0067] In this step, by illuminating display devices 120 of different colors, target display devices 1201 and non-target display devices 1202 of different colors are selected. Non-target display devices 1202 are display devices 120 with basically the same brightness value. Generally, the number of non-target display devices 1202 in the display panel 10 is the majority. Under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device 1201 and the average brightness value of the light emitted by the non-target display devices 1202 is greater than a preset first brightness difference value (for example, 10% of the average brightness value). Generally, the number of target display devices 1201 in the display panel 10 is the minority.

[0068] Step S13: Measure the brightness offset value of the target display device 1201 and the target position coordinates of the target display device 1201 on the driving backplane.

[0069] The brightness offset value refers to the difference in brightness between the light emitted by the target display device 1201 and the average brightness value of the light emitted by the non-target display device 1202 under the same electrical signal driving action. The brightness offset value and target position coordinates can be obtained in the following way: First, acquire the measurement image including each display device 120 during the measurement; then, identify the target display device 1201 with abnormal brightness value in the measurement image by performing image processing on the measurement image and obtain its corresponding target position coordinates, and calculate the brightness offset value of the target display device 1201.

[0070] Step S14: Based on the brightness offset value and the target position coordinates, a brightness adjustment layer 130 is fabricated on the light-emitting side of the target display device 1201.

[0071] In step S14, the orthographic projection of the fabricated brightness adjustment layer 130 on the driving backplate 110 covers the orthographic projection of the target display device 1201 on the driving backplate 110. In this way, under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device 1201 after passing through the brightness adjustment layer 130 and the brightness value of the light emitted by the non-target display device 1202 is less than a preset second brightness difference value, and the second brightness difference value is less than the first brightness difference value.

[0072] In this embodiment, the brightness adjustment layer 130 may include a brightness attenuation layer 1301, and the target display device 1201 may include a first target display device 12011. Under the same electrical signal driving action, the brightness value of the light emitted by the first target display device 12011 is greater than the average brightness value of the light emitted by the non-target display device 12012. In step S14, the brightness attenuation layer 1301 may be made on the light-emitting side of the first target display device 12011 based on the brightness offset value and the target position coordinates.

[0073] In this embodiment, the brightness adjustment layer 130 may further include a brightness anti-reflection layer 1302, and the target display device 1201 may include a second target display device 12012. Under the same electrical signal driving action, the brightness value of the light emitted by the second target display device 12012 is less than the average brightness value of the light emitted by the non-target display device 12012. In step S14, the brightness anti-reflection layer 1302 may be fabricated on the light-emitting side of the second target display device 12012 based on the brightness offset value and the target position coordinates.

[0074] Furthermore, in one embodiment of this example, step S14 can be implemented in the following way.

[0075] First, based on the brightness offset value and the pre-stored correspondence between the brightness offset value and the thickness of the brightness adjustment layer, the target thickness of the brightness adjustment layer to be manufactured is obtained.

[0076] Then, based on the target position coordinates, the nozzle of the inkjet printer is controlled to move above the target display device 1201, and the inkjet printer is controlled to spray a brightness adjustment layer 130 of the target thickness onto the target display device 1201.

[0077] In this embodiment, the ink used for inkjet printing has a relatively low viscosity (e.g., 10 cps). In order to ensure that the thickness of the brightness adjustment layer 130 can reach the target thickness, the brightness adjustment layer 130 of the target thickness can be obtained by controlling the inkjet printing equipment to perform multiple layer-by-layer spraying and printing on the target display device 1201.

[0078] Furthermore, in another embodiment of this example, before step S14, the manufacturing method provided by this embodiment may also include the following steps.

[0079] First, we divide the brightness value offset levels into different brightness offset values.

[0080] Then, a brightness adjustment layer array corresponding to different brightness value offset levels is prepared on a transfer plate coated with a photosensitive adhesive layer, wherein the same brightness value offset level corresponding to the same brightness adjustment layer array is prepared on the same transfer plate.

[0081] In this embodiment, step S14 can be implemented in the following way.

[0082] First, based on the brightness value offset level corresponding to the brightness offset value, select the brightness adjustment layer array corresponding to the brightness value offset level.

[0083] Then, the transfer board containing the selected brightness adjustment layer array is aligned with the driving backplane, and the brightness adjustment layer at the corresponding position on the transfer board is transferred to the light-emitting side of the target display device 1201 according to the target position coordinates.

[0084] In this embodiment, after the brightness adjustment layer 130 is fabricated, an encapsulation layer 150, a touch function layer 160, an adhesive layer 170, and a cover plate 180 can be sequentially fabricated on the side of the display device 120 and the black matrix layer 140 away from the driving backplate 110. The encapsulation layer 150 can be an organic film layer formed of epoxy resin material, or an inorganic film layer composed of SiOx or SiNx.

[0085] In this embodiment, electrical signal compensation can also be performed on the display panel 10 to further optimize the uniformity of the display panel 10.

[0086] The display panel and its manufacturing method provided in this embodiment involve setting a brightness adjustment layer on the light-emitting side of the target display, where the average brightness value of the light emitted by the target display device differs significantly from that of the non-target display devices. This allows the brightness value of the light emitted by the target display device after passing through the brightness adjustment layer to approach the average brightness value of the light emitted by the non-target display devices, thereby improving the differences in luminous performance among the display devices on the display panel. Simultaneously, this method of improving the differences in luminous performance among the display devices does not affect the adjustable grayscale range of each display device. The color depth of each display device in the display panel remains unaffected, ensuring the display uniformity of the display panel and enhancing its market competitiveness.

[0087] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, Includes the driver backplane, display device, and brightness adjustment layer; The display device is mounted on the drive backplate; The display device includes a target display device and a non-target display device, wherein, under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device and the average brightness value of the light emitted by the non-target display device is greater than a preset first brightness difference value. The brightness adjustment layer is disposed on the light-emitting side of the target display device. The orthographic projection of the brightness adjustment layer on the driving back plate covers the orthographic projection of the target display device on the driving back plate. Under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device after passing through the brightness adjustment layer and the average brightness value of the light emitted by the non-target display devices is less than a preset second brightness difference value. The second brightness difference value is less than the first brightness difference value. The brightness adjustment layer includes a brightness attenuation layer; The target display device includes a first target display device, wherein, under the same electrical signal driving action, the brightness value of the light emitted by the first target display device is greater than the average brightness value of the light emitted by the non-target display device; The brightness attenuation layer is disposed on the light-emitting side of the first target display device; The brightness adjustment layer includes a brightness anti-reflection layer; The target display device includes a second target display device, wherein, under the same electrical signal driving action, the brightness value of the light emitted by the second target display device is less than the average brightness value of the light emitted by the non-target display device; The brightness enhancement layer is disposed on the light-emitting side of the second target display device.

2. The display panel as described in claim 1, characterized in that, The brightness attenuation layer includes light-absorbing particles, and the thickness of the brightness attenuation layer is 0.1µm to 10µm. The thickness of the brightness attenuation layer is positively correlated with the brightness value of the light emitted by the first target display device.

3. The display panel as described in claim 2, characterized in that, The brightness enhancement layer is a transparent spherical lens structure, and the thickness of the brightness enhancement layer is 1um to 50um. The thickness of the brightness enhancement layer is negatively correlated with the brightness value of the light emitted by the second target display device.

4. A method for manufacturing a display panel, characterized in that, The method includes: The display device is transferred to the drive backplane and electrically connected to the drive backplane. The display device is lit up, and target display devices and non-target display devices are selected from the display devices. Under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device and the average brightness value of the light emitted by the non-target display devices is greater than a preset first brightness difference value. Measure the brightness offset value of the target display device and the target position coordinates of the target display device on the driving backplate; Based on the brightness offset value and the target position coordinates, a brightness adjustment layer is made on the light-emitting side of the target display device, and the orthographic projection of the brightness adjustment layer on the driving back plate covers the orthographic projection of the target display device on the driving back plate. Under the same electrical signal driving action, the difference between the brightness value of the light emitted by each target display device after passing through the brightness adjustment layer and the brightness value of the light emitted by the non-target display device is less than a preset second brightness difference value, and the second brightness difference value is less than the first brightness difference value. The brightness adjustment layer includes a brightness attenuation layer, and the target display device includes a first target display device, wherein, under the same electrical signal driving action, the brightness value of the light emitted by the first target display device is greater than the average brightness value of the light emitted by the non-target display device; the step of fabricating the brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates includes: The brightness attenuation layer is fabricated on the light-emitting side of the first target display device based on the brightness offset value and the target position coordinates; The brightness adjustment layer includes a brightness anti-reflection layer, and the target display device includes a second target display device, wherein, under the same electrical signal driving action, the brightness value of the light emitted by the second target display device is less than the average brightness value of the light emitted by the non-target display device; the step of fabricating the brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates includes: The brightness antireflection layer is fabricated on the light-emitting side of the second target display device based on the brightness offset value and the target position coordinates.

5. The method for manufacturing a display panel as described in claim 4, characterized in that, The step of fabricating a brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates further includes: Based on the brightness offset value and the pre-stored correspondence between the brightness offset value and the thickness of the brightness adjustment layer, the target thickness of the brightness adjustment layer to be manufactured is obtained. Based on the target position coordinates, the nozzle of the inkjet printing equipment is controlled to move above the target display device, and the inkjet printing equipment is controlled to spray and print a brightness adjustment layer of the target thickness on the target display device.

6. The method for manufacturing a display panel as described in claim 5, characterized in that, The step of controlling the inkjet printing equipment to spray and print a brightness adjustment layer of the target thickness onto the target display device includes: The inkjet printing equipment is controlled to perform multiple layer-by-layer spraying and printing on the target display device to obtain a brightness adjustment layer of the target thickness.

7. The method for manufacturing a display panel as described in claim 5, characterized in that, Before the step of fabricating a brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates, the method includes: Divide the brightness value offset levels into different brightness offset values; A brightness adjustment layer array corresponding to different brightness value offset levels is prepared on a transfer plate coated with a photosensitive adhesive layer, wherein the same brightness value offset level corresponding to the same brightness value offset level is prepared on the same transfer plate.

8. The method for manufacturing a display panel as described in claim 7, characterized in that, The step of fabricating a brightness adjustment layer on the light-emitting side of the target display device based on the brightness offset value and the target position coordinates further includes: Based on the brightness value offset level corresponding to the brightness offset value, select a brightness adjustment layer array corresponding to the brightness value offset level; Align the selected brightness adjustment layer array with the transfer board and the driving backplane, and transfer the brightness adjustment layer at the corresponding position on the transfer board to the light-emitting side of the target display device according to the target position coordinates.

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