Display panel, manufacturing method of display panel and display device

Abstract

The invention belongs to the technical field of display, and particularly relates to a display panel, a manufacturing method of the display panel and a display device. The display panel comprises a driving substrate and a display function layer formed on the driving substrate, the display function layer comprises a thermoelectric cooling material layer and organic light-emitting materials, the thermoelectric cooling material layer is provided with a plurality of pixel openings, the thermoelectric cooling material layer is electrically connected with the driving substrate, and the organic light-emitting materials are formed in each pixel opening; the characteristic that the thermoelectric cooling material layer is cooled under the action of the voltage is utilized, and the driving substrate provides the first target voltage for the thermoelectric cooling material layer at least in the curing process of the organic light-emitting material, so that the thermoelectric cooling material layer can be cooled to the first target temperature under the action of the first target voltage; the temperature of the edge of the organic light-emitting material is lower than that of the center of the organic light-emitting material, so that the possibility that the organic light-emitting material is thick in edge and thin in center is reduced, and the display quality of the display panel is improved.

Description

Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a display panel, a method for manufacturing a display panel, and a display device. Background Art

[0002] In the field of display technology, when an organic light-emitting material is formed on a substrate by a solution method such as an inkjet printing method, a coffee ring defect is prone to occur. That is, when the organic light-emitting material is spread on the substrate, the volatilization rate of the organic solvent at the edge is greater than the volatilization rate of the organic solvent at the center. In order to compensate for the loss of organic solvent at the edge, capillary flow from the center to the edge will occur inside the organic light-emitting material. In the process of flowing toward the edge, the organic solvent drives the organic solute to the edge, causing a large amount of organic solute to accumulate at the edge. After solidification, the organic light-emitting material will present a coffee ring appearance with a thin center and thick edges, which will affect the display quality of the display panel. Summary of the invention

[0003] The purpose of the present application is to provide a display panel, a method for manufacturing a display panel, and a display device, which reduces or avoids the possibility of the organic light-emitting material having a thick edge and a thin center by making the temperature at the edge of the organic light-emitting material lower than the temperature at the center, thereby improving the display quality of the display panel.

[0004] The present disclosure provides a display panel, comprising:

[0005] Driver substrate;

[0006] A display function layer is formed on the driving substrate, the display function layer includes a thermoelectric cooling material layer and an organic light-emitting material, the thermoelectric cooling material layer has a plurality of pixel openings arranged in an array along a row direction and a column direction, the thermoelectric cooling material layer is electrically connected to the driving substrate, and the organic light-emitting material is formed in each of the pixel openings;

[0007] The driving substrate is at least capable of providing a first target voltage to the thermoelectric cooling material layer during the curing process of the organic light-emitting material, and the thermoelectric cooling material layer is capable of being reduced to a first target temperature under the action of the first target voltage so that the temperature at the edge of the organic light-emitting material is lower than the temperature at the center thereof.

[0008] In an exemplary embodiment of the present disclosure, during the curing process of the organic light-emitting material: the driving substrate can also stop providing the first target voltage to the thermoelectric cooling material layer when the curing thickness at the center of the organic light-emitting material reaches a set thickness value.

[0009] In an exemplary embodiment of the present disclosure, the driving substrate can also provide a second target voltage to the thermoelectric cooling material layer when the temperature of the display panel is greater than the temperature setting value, and the thermoelectric cooling material layer can be reduced to a second target temperature under the action of the second target voltage so that the temperature of the display panel is less than or equal to the temperature setting value.

[0010] In an exemplary embodiment of the present disclosure, the first target voltage is the same as the second target voltage, and the first target temperature is the same as the second target temperature; and / or

[0011] The first target temperature ranges from -50°C to 0°C, and the second target temperature ranges from -50°C to 0°C; and / or

[0012] The material of the thermoelectric cooling material layer includes at least one of bismuth telluride, sodium bismuth titanate-based ceramic material, barium strontium titanate, barium strontium niobate ceramic, barium strontium zirconate titanate ceramic, silver niobate ceramic, and sodium bismuth titanate-based film.

[0013] In an exemplary embodiment of the present disclosure, the top area of ​​the pixel opening is larger than the bottom area of ​​the pixel opening, and the orthographic projection of the bottom of the pixel opening on the driving substrate is located within the orthographic projection of the top of the pixel opening on the driving substrate.

[0014] In an exemplary embodiment of the present disclosure, the vertical cross-section of the pixel opening is an isosceles trapezoid; or

[0015] The pixel opening comprises a plurality of opening segments which are arranged in sequence in the vertical direction and have a coaxial line, and the top end area of ​​the opening segment is greater than or equal to the bottom end area of ​​the opening segment;

[0016] Wherein, along the direction away from the driving substrate, the maximum areas of the plurality of opening sections increase successively, and a step surface is formed at the junction of adjacent opening sections.

[0017] The present disclosure provides a method for manufacturing a display panel, comprising:

[0018] Providing a driving substrate;

[0019] Forming a thermoelectric cooling material layer on the driving substrate, the thermoelectric cooling material layer is electrically connected to the driving substrate, and the thermoelectric cooling material layer has a plurality of pixel openings arranged in an array along a row direction and a column direction;

[0020] Dropping a corresponding organic light-emitting material into each of the pixel openings, and curing the organic light-emitting material;

[0021] During the curing of the organic light-emitting material, the driving substrate is used to provide a first target voltage to the thermoelectric cooling material layer. Under the action of the first target voltage, the thermoelectric cooling material layer is reduced to a first target temperature, so that the temperature at the edge of the organic light-emitting material is lower than the temperature at the center thereof.

[0022] In an exemplary embodiment of the present disclosure, during the curing of the organic light-emitting material, the cured thickness at the center of the organic light-emitting material is detected;

[0023] When the solidified thickness at the center of the organic light-emitting material is greater than or equal to the set thickness value, supplying the first target voltage to the thermoelectric cooling material layer is stopped.

[0024] The present disclosure provides a display device, the display device comprising:

[0025] A display panel as described in any one of the above;

[0026] The controller is connected to the driving substrate and is used to control the driving substrate to provide a first target voltage to the thermoelectric cooling material layer during the curing process of the organic light-emitting material.

[0027] In an exemplary embodiment of the present disclosure, a temperature detector is further included, connected to the controller;

[0028] Wherein, the temperature detector is used to detect the temperature of the display panel and transmit the temperature detection result to the controller. The controller can provide a second target voltage to the thermoelectric cooling material layer when the temperature of the display panel is greater than the temperature setting value. The thermoelectric cooling material layer can be reduced to a second target temperature under the action of the second target voltage so that the temperature of the display panel is less than or equal to the temperature setting value.

[0029] This application scheme has the following beneficial effects:

[0030] The present invention can reduce the temperature at the edge of the organic light-emitting material through the action of the thermoelectric cooling material layer, so that during the curing process, the volatilization rate at the edge of the organic light-emitting material can be reduced, thereby reducing the difference in volatilization rate between the center and the edge of the organic light-emitting material, and then improving the problem of capillary flow from the center to the edge of the organic light-emitting material, thereby reducing the possibility of the cured organic light-emitting material having a thick edge and thin center morphology, and improving the display quality of the display panel.

[0031] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0032] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the process of solidifying and forming the organic light-emitting material when the display panel is not provided with a thermoelectric cooling material layer in the embodiment of the present disclosure.

[0035] Figure 2 It is a schematic diagram of the cross-sectional structure of the display panel in the embodiment of the present disclosure.

[0036] Figure 3 Schematic diagram of a cross-sectional structure of a pixel opening in an embodiment of the present disclosure.

[0037] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure.

[0038] Figure 5 FIG. 4 is another schematic diagram of a cross-sectional structure of a pixel opening in an embodiment of the present disclosure.

[0039] Figure 6 for Figure 5 Schematic diagram of the local enlarged structure.

[0040] Figure 7 It is a schematic diagram of the process of manufacturing a display panel in an embodiment of the present disclosure.

[0041] Figure 8 It is a schematic cross-sectional structure diagram of forming a thermoelectric cooling material layer on a driving substrate according to an embodiment of the present disclosure.

[0042] Fig. 9 for Figure 8 Schematic diagram of the top view structure.

[0043] Description of reference numerals:

[0044] 1. Display panel;

[0045] 11. driving substrate; 12. display function layer; 121. thermoelectric cooling material layer; 1211. pixel opening; 122. organic light emitting material; 1221. organic solvent; 1222. organic solute;

[0046] X1, row direction; X2, column direction; Y, vertical direction. DETAILED DESCRIPTION

[0047] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete and will fully convey the concept of the example embodiments to those skilled in the art.

[0048] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0049] The present disclosure is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be understood as limiting the present disclosure.

[0050] like Figure 1 As shown, in the process of making the display panel 1, when the organic light-emitting material 122 is dripped onto the driving substrate 11 and solidified, the volatilization rate of the organic solvent 1221 at the edge of the organic light-emitting material 122 is greater than the volatilization rate of the organic solvent 1221 at the center. In order to compensate for the loss of the organic solvent 1221 at the edge, the organic light-emitting material 122 will produce a capillary flow from the center to the edge. In the process of flowing toward the edge, the organic solvent 1221 will also drive the organic solute 1222 to the edge, so that the organic solute 1222 accumulates in large quantities at the edge. Therefore, after solidification, the organic light-emitting material 122 will present a coffee ring shape with a thin center and a thick edge. During the display process, the brightness at the edge of the organic light-emitting material 122 is greater than the brightness at the center, which will cause the display screen of the display panel 1 to be abnormal.

[0051] In order to solve the above technical problems, the present disclosure provides a display panel 1, such as Figure 2 As shown, the display panel 1 includes a driving substrate 11 and a display function layer 12 , and the display function layer 12 is formed on the driving substrate 11 .

[0052] The display function layer 12 includes a thermoelectric cooling material layer 121 and an organic light-emitting material 122. The thermoelectric cooling material layer 121 is electrically connected to the driving substrate 11. The thermoelectric cooling material layer 121 has a plurality of pixel openings 1211 arranged in an array along the row direction X1 and the column direction X2, and an organic light-emitting material 122 is formed in each pixel opening 1211.

[0053] The driving substrate 11 can at least provide a first target voltage to the thermoelectric cooling material layer 121 during the curing process of the organic light-emitting material 122. The thermoelectric cooling material layer 121 can be reduced to a first target temperature under the action of the first target voltage, so that the temperature at the edge of the organic light-emitting material 122 is lower than the temperature at the center, thereby reducing the difference in the volatilization rate between the center and the edge of the organic light-emitting material 122, and improving the problem of capillary flow from the center to the edge of the organic light-emitting material 122, so as to reduce the possibility of the cured organic light-emitting material 122 having a thick edge and a thin center, and improve the display quality of the display panel. In addition, the thermoelectric cooling material layer 121 can also form a barrier between two adjacent organic light-emitting materials 122 to avoid the organic light-emitting material 122 from flowing before curing, thereby causing the risk of crosstalk between the organic light-emitting materials 122.

[0054] It should be noted that when the first target voltage is applied to the thermoelectric cooling material layer 121, the surface temperature of the thermoelectric cooling material layer 121 can be rapidly reduced to the first target temperature. Since the edge of the organic light-emitting material 122 is closer to the surface of the thermoelectric cooling material layer 121 than the center of the organic light-emitting material 122, when the temperature of the thermoelectric cooling material layer 121 decreases, the edge of the organic light-emitting material 122 is affected by the temperature change of the thermoelectric cooling material layer 121 earlier than the center thereof, so that the temperature at the edge of the organic light-emitting material 122 is lower than the temperature at the center thereof. When the thermoelectric cooling material layer 121 is at the first target temperature for a long time, the organic light-emitting material 122 is affected by the low temperature of the thermoelectric cooling material layer 121, and the temperature at the center thereof gradually decreases and eventually becomes consistent with the temperature at the edge of the organic light-emitting material 122.

[0055] In order to reduce the possibility of the cured organic light-emitting material 122 having a morphology of being thick at the edges and thin at the center, the embodiment of the present disclosure can apply a first target voltage to the thermoelectric cooling material layer 121 to make the temperature at the edge of the organic light-emitting material 122 higher than the temperature at the center thereof, while at the same time making the center of the organic light-emitting material 122 reach the curing condition.

[0056] It should be noted that the solidification conditions mentioned above refer to the conditions under which the organic light-emitting material 122 is transformed from a molten state to a solid state.

[0057] For example, the organic light-emitting material 122 in the embodiment of the present disclosure may be a light-curing material, in which case the curing condition of the organic light-emitting material 122 is a light condition; the organic light-emitting material 122 in the embodiment of the present disclosure may also be a temperature-curing material, in which case the curing condition of the organic light-emitting material 122 is a temperature condition. However, the organic light-emitting material 122 is not limited thereto, and may also be other materials besides light-curing materials and temperature-curing materials. Therefore, the organic light-emitting material 122 may be controlled to reach the curing condition according to the type of the organic light-emitting material 122.

[0058] Taking the organic light-emitting material 122 as a photocurable material as an example, at this time, by irradiating the organic light-emitting material 122, the organic light-emitting material 122 can be converted from a molten state to a solid state. In the embodiment of the present disclosure, the organic light-emitting material 122 can be illuminated while applying the first target voltage to the thermoelectric cooling material layer 121, so that the organic light-emitting material 122 is gradually cured under the illumination condition. Because the temperature at the edge of the organic light-emitting material 122 is lower than the temperature at the center under the action of the first target voltage, the energy required to achieve curing at the center of the organic light-emitting material 122 is less than the energy required to achieve curing at the edge. When the center and edge of the organic light-emitting material 122 are subjected to the same illumination conditions, the curing rate at the center of the organic light-emitting material 122 is greater than the curing rate at the edge, thereby improving the problem of capillary flow of the organic light-emitting material 122 from the center to the edge, thereby reducing the possibility of the cured organic light-emitting material 122 having a thick edge and thin center morphology, and improving the display quality of the display panel 1.

[0059] However, the present invention is not limited thereto. The organic light-emitting material 122 may also be a temperature-curable material. When the first target voltage is applied to the thermoelectric cooling material layer 121, an additional temperature control device may be used to allow the organic light-emitting material 122 to reach a curable temperature condition. Since the temperature at the edge of the organic light-emitting material 122 is lower than the temperature at the center under the action of the first target voltage, the center of the organic light-emitting material 122 may reach a curable temperature condition before the edge thereof. That is, the center of the organic light-emitting material 122 may be cured before the edge thereof, thereby improving the problem of capillary flow of the organic light-emitting material 122 from the center to the edge, thereby reducing the possibility of the cured organic light-emitting material 122 having a thick edge and thin center morphology, thereby improving the display quality of the display panel 1.

[0060] Specifically, the organic light-emitting material 122 in the embodiment of the present disclosure may include a main organic molecule, a carrier organic molecule, and an auxiliary agent. Among them, the main organic molecule may include at least one of a benzene ring, a biphenyl ring, a fluorene group, a carbazole, a fluorofluorene and the like structures, and the main organic molecule can undergo charge transfer, fluorescence resonance and other processes, thereby achieving luminescence. The carrier organic molecule may include at least one of a polyaromatic compound and a polyurethane, and the carrier organic molecule can promote the intermolecular interaction of the main organic molecule, improve the luminescence efficiency, and can also change the physical properties and thermal stability of the material. The auxiliary agent may include at least one of a metal complex, an organic acid, and an organosilicon compound, and the auxiliary agent can be used to change the carrier transport and energy level distribution of the material, adjust the wavelength of the luminescence, improve the luminescence efficiency, and enhance the stability of the material.

[0061] In the disclosed embodiment, the value range of the first target temperature can be -50°C to 0°C. For example, the specific value of the first target temperature can be: -50°C, -40°C, -30°C, -20°C, -10°C, 0°C, etc., which can be adjusted according to actual conditions.

[0062] It should be noted that, by preventing the first target temperature from being lower than -50°C, the embodiment of the present disclosure can reduce the problem of long curing time and low curing efficiency of the organic light-emitting material 122 caused by too low temperature of the organic light-emitting material 122. In addition, by preventing the first target temperature from being higher than 0°C, the problem of serious coffee ring appearance of the organic light-emitting material 122 caused by the small temperature difference between the edge of the organic light-emitting material 122 and its center can be reduced.

[0063] Furthermore, during the curing process of the organic light-emitting material 122 , the driving substrate 11 can also stop providing the first target voltage to the thermoelectric cooling material layer 121 when the curing thickness at the center of the organic light-emitting material 122 reaches a set thickness value.

[0064] Among them, the “cured thickness” refers to the thickness of the film formed by the organic solute 1222 being cured on the driving substrate 11 after the organic solvent 1221 in the organic light-emitting material 122 evaporates, and the “thickness setting value” can be an arbitrary value set by the inspector for the cured thickness at the center of the organic light-emitting material 122.

[0065] For example, the thickness setting value can be greater than or equal to the average solidified thickness of the organic light-emitting material 122 after full solidification, so that when the solidified thickness at the center of the organic light-emitting material 122 reaches the thickness setting value and the first target voltage is stopped from being provided to the thermoelectric cooling material layer 121, the solidified thickness at the center of the solidified organic light-emitting material 122 can be greater than or greater than the solidified thickness at its edge, thereby reducing the possibility of the organic light-emitting material 122 having a coffee ring appearance with a thin center and thick edges, and improving the display quality of the display panel 1.

[0066] However, the thickness setting value may also be less than the average solidified thickness of the organic light-emitting material 122 after it is completely solidified. Since the solidified thickness at the center of the organic light-emitting material 122 reaches the thickness setting value and stops providing the first target voltage to the thermoelectric cooling material layer 121, the organic light-emitting material 122 may not be completely solidified. Before the organic light-emitting material 122 is completely solidified, there is still a possibility that part of the organic solute 1222 moves to the center of the organic light-emitting material 122 to increase the solidified thickness at the center of the organic light-emitting material 122. Therefore, when the thickness setting value is less than the average solidified thickness of the organic light-emitting material 122 after it is completely solidified, if it can be ensured that after the organic light-emitting material 122 is completely solidified and formed, the solidified thickness at the center thereof is greater than or equal to the solidified thickness at the edge thereof, it is also included in the scope of the embodiments of the present disclosure.

[0067] Furthermore, the embodiment of the present disclosure can control the time when the driving substrate 11 stops supplying power to the thermoelectric cooling material layer 121 by predicting the size of the thickness setting value, so as to control the solidification thickness at the center of the organic light-emitting material 122 after solidification to be the same as the solidification thickness at the edge thereof, that is, the organic light-emitting material 122 forms a structure with uniform film thickness as a whole. In the display state, the luminous brightness at the center of the organic light-emitting material 122 is the same as that at the edge thereof, thereby improving the uniformity of the display brightness of the display panel 1.

[0068] In addition, the driving substrate 11 in the embodiment of the present disclosure can supply power to the thermoelectric cooling material layer 121 continuously or intermittently. By controlling the power supply time of the driving substrate 11 to the thermoelectric cooling material layer 121, the degree of temperature controllability can be increased. While making the temperature at the edge of the organic light-emitting material 122 lower than the temperature at its center, it can also prevent the organic light-emitting material 122 from being affected by the thermoelectric cooling material layer 121 for a long time, resulting in the temperature at the center of the organic light-emitting material 122 being too low, and further resulting in the overall volatilization rate of the organic light-emitting material 122 being slow during the production process of the display panel 1, thereby affecting the progress of subsequent processes.

[0069] For example, the present disclosure can control the driving substrate 11 to intermittently supply power to the thermoelectric cooling material layer 121, that is, after the driving substrate 11 supplies power to the thermoelectric cooling material layer 121 for a certain period of time, the driving substrate 11 stops supplying power to the thermoelectric cooling material layer 121 to avoid the thermoelectric cooling material layer 121 from cooling down for a long time, causing the temperature at the center of the organic light-emitting material 122 to become consistent with the temperature at its edge. After stopping supplying power for a period of time, the driving substrate 11 supplies power to the thermoelectric cooling material layer 121 again to make the temperature at the edge of the organic light-emitting material 122 lower than the temperature at its center.

[0070] In the embodiment of the present disclosure, by enabling the driving substrate 11 to provide the first target voltage to the organic light-emitting material 122, it is ensured that the curing rate at the center of the organic light-emitting material 122 is greater than the curing rate at the edge thereof, thereby preventing the organic light-emitting material 122 from generating capillary flow from the center to the edge and causing the problem of coffee ring appearance. In addition, when the cured thickness at the center of the organic light-emitting material 122 reaches a set thickness value, the first target voltage is stopped from being provided to the thermoelectric cooling material layer 121, so that the temperature of the thermoelectric cooling material layer 121 can be increased, so that after the cured thickness at the center of the organic light-emitting material 122 reaches the set thickness value, the curing rate at the edge of the organic light-emitting material 122 can be accelerated, thereby improving the curing rate of the organic light-emitting material 122 and the manufacturing efficiency of the display panel 1, and reducing the energy consumption of the display panel 1, so as to reduce the manufacturing cost of the display panel 1.

[0071] During the display process of the display panel 1, when the temperature of the display panel 1 is greater than the temperature setting value, the driving substrate 11 can also provide a second target voltage to the thermoelectric cooling material layer 121, and the thermoelectric cooling material layer 121 can be reduced to a second target temperature under the action of the second target voltage, so that the temperature of the display panel 1 is less than or equal to the temperature setting value.

[0072] It should be noted that the temperature of the display panel 1 may refer to the actual working temperature of the display panel 1 during the display process, or may refer to the actual temperature of the display panel 1 when it is not displaying. The "temperature setting value" may be an arbitrary value set by the inspector for the temperature of the display panel 1 to ensure that the service life and normal display of the display panel 1 will not be affected under the temperature setting value.

[0073] It should be understood that when the temperature of the display panel 1 is greater than the temperature setting value, the life of the display panel 1 will be shortened or color shift will occur, and the organic light-emitting material 122 will be decomposed and destroyed under the action of the current, thereby weakening the light-emitting effect, causing the brightness of the display panel 1 to drop significantly. In addition, if the display panel 1 works in a high temperature environment higher than the temperature setting value for a long time, it is also very easy to cause the display panel 1 to have a burn-in phenomenon. For example, when certain areas on the display panel 1 display a fixed image or color for a long time, the aging speed of the organic light-emitting material 122 in these areas will be inconsistent, resulting in the display panel 1 forming a permanent afterimage or discoloration.

[0074] To avoid the above situation, the embodiment of the present disclosure can monitor the temperature of the display panel 1 in real time. When the temperature of the display panel 1 is greater than the temperature setting value, the driving substrate 11 can provide a second target voltage to the thermoelectric cooling material layer 121. The thermoelectric cooling material layer 121 is reduced to a second target temperature under the action of the second target voltage, so that the temperature of the display panel 1 is less than or equal to the temperature setting value, thereby ensuring the display quality of the display panel 1 while extending the service life of the display panel 1.

[0075] In the disclosed embodiment, the second target voltage may be the same as the first target voltage, and the second target temperature may be the same as the first target temperature, so that a set of programs can be used to control the driving substrate 11 to provide the first target voltage and the second target voltage to the thermoelectric cooling material layer 121, thereby optimizing the algorithm of the control program and reducing the complexity of the driving.

[0076] But not limited to this, the second target voltage may also be different from the first target voltage, and the second target temperature may also be different from the first target temperature. As long as the thermoelectric cooling material layer 121 can make the temperature of the display panel 1 less than or equal to the temperature setting value at the second target temperature to ensure the normal display of the display panel 1, while reducing the risk of shortening the service life of the display panel 1 when it works in a high temperature environment for a long time, it is included in the scope of the present disclosure.

[0077] Specifically, the temperature setting value range of the display panel 1 can be 0°C to 35°C, and the second target temperature range can be -50°C to 0°C. When it is detected that the temperature of the display panel 1 exceeds 35°C, the driving substrate 11 can apply the second target voltage to the thermoelectric cooling material layer 121 to reduce the surface temperature of the thermoelectric cooling material layer 121 to -50°C to 0°C, and reduce the temperature of the display panel 1 to 0°C to 35°C.

[0079] It should be noted that the display panel 1 in the embodiment of the present disclosure can be used for vehicle display. When the temperature inside the vehicle rises and causes the temperature of the display panel 1 to exceed the temperature setting value range, or the temperature of the display panel 1 rises during the display process and causes its temperature to exceed the temperature setting value range, a second target voltage can be provided to the thermoelectric cooling material layer 121 so that the thermoelectric cooling material layer 121 can be reduced to the second target temperature under the action of the second target voltage, and the temperature of the display panel 1 is less than or equal to the temperature setting value.

[0080] In the embodiment of the present disclosure, the pixel opening 1211 may include a top end and a bottom end, and the top end of the pixel opening 1211 is located at a side of the bottom end of the pixel opening 1211 away from the driving substrate 11 .

[0081] Among them, Figure 2As shown, in some embodiments of the present disclosure, the top area of ​​the pixel opening 1211 may be equal to the bottom area of ​​the pixel opening 1211, and the orthographic projection of the bottom of the pixel opening 1211 on the driving substrate 11 coincides with the orthographic projection of the top of the pixel opening 1211 on the driving substrate 11. At this time, the side wall surface of the pixel opening 1211 as a whole may be set vertically or approximately vertically to the driving substrate 11, and the overall structure of the pixel opening 1211 is simple and easy to implement through processes such as photolithography.

[0082] like Figures 3 to 6 As shown, in other embodiments of the present disclosure, the top area of ​​the pixel opening 1211 may be larger than the bottom area of ​​the pixel opening 1211, and the orthographic projection of the bottom of the pixel opening 1211 on the driving substrate 11 is located within the orthographic projection of the top of the pixel opening 1211 on the driving substrate 11. At this time, at least part of the side wall of the pixel opening 1211 is an inclined side wall inclined relative to the vertical line of the driving substrate 11, and the side of the inclined side wall away from the driving substrate 11 is inclined in a direction away from the center of the pixel opening 1211. When the organic light-emitting material 122 contacts the inclined side wall of the pixel opening 1211, the organic solute 1222 in the organic light-emitting material 122 flows toward the center of the pixel opening 1211 under the action of the inclined side wall and gravity, thereby reducing the possibility of a large amount of organic solute 1222 accumulating at the edge of the organic light-emitting material 122 and causing the solidified organic light-emitting material 122 to present a coffee ring appearance with a thin center and thick edges, thereby improving the display quality of the display panel 1.

[0083] For example, Figure 3 and Figure 4 As shown, the vertical cross-section of the pixel opening 1211 in the embodiment of the present disclosure can be an isosceles trapezoid. In this case, the center of the organic light-emitting material 122 can coincide with the axis of the pixel opening 1211, so that in any vertical cross-section of the pixel opening 1211, the contact area between the edge of the organic light-emitting material 122 and the two opposite side walls of the pixel opening 1211 is the same, so as to improve the uniformity of the temperature at the edge of the organic light-emitting material 122, and further improve the uniformity of the film thickness of the cured organic light-emitting material 122, so as to improve the uniformity of the display brightness of the display panel 1 and the display effect of the display panel 1.

[0084] However, the invention is not limited thereto. The vertical cross section of the pixel opening 1211 may also be a right-angled trapezoid or other trapezoid other than an isosceles trapezoid, and the specific shape may be determined according to actual conditions.

[0085] In addition, the side wall surface of the pixel opening 1211 can be a flat surface or a curved surface. For example, the pixel opening 1211 can be in a prism shape, a truncated cone shape, etc., which is not specifically limited here.

[0086] It should be noted that the vertical cross section refers to a cross section of the pixel opening 1211 taken along the vertical direction Y, and the vertical direction Y refers to a direction perpendicular or approximately perpendicular to the drive substrate 11 .

[0087] In addition, if Figure 5 and Figure 6 As shown, the pixel opening 1211 may also include a plurality of opening sections arranged in sequence in the vertical direction Y and coaxial, each opening section having a top and a bottom, the top of the opening section being located at the side of the bottom of the opening section away from the driving substrate 11, the top area of ​​each opening section being greater than or equal to the bottom area thereof, wherein the maximum area of ​​the plurality of opening sections increases in sequence along the direction away from the driving substrate 11, and a step surface is formed at the junction of adjacent opening sections. Specifically, in two adjacent opening sections, the bottom end of one opening section is connected to the top end of the other opening section, and the bottom end area of ​​the opening section on the side away from the driving substrate 11 is greater than the top end area of ​​the opening section on the side close to the driving substrate 11.

[0088] For example, each opening segment can be set as a cuboid with different top areas. When multiple opening segments are arranged in sequence in the vertical direction Y, the top areas of the opening segments increase along the vertical direction Y from the drive substrate 11 to the display function layer 12. In two adjacent opening segments, the bottom end of one opening segment is connected to the top end of the other adjacent opening segment, the area of ​​the bottom end is larger than the area of ​​the top end connected thereto, and the orthographic projection of the top end on the drive substrate 11 is located within the orthographic projection of the bottom end connected thereto on the drive substrate 11. At this time, the pixel opening 1211 can be in an inverted step shape.

[0089] But it is not limited to this, the opening segment can also be a cube, triangular prism, cylinder, etc. in addition to the rectangular parallelepiped. In addition, in the same pixel opening 1211, the axes of multiple opening segments arranged in sequence in the vertical direction Y may also be different, and no specific limitation is made here.

[0090] The embodiment of the present disclosure increases the contact area between the edge of the organic light-emitting material 122 and the thermoelectric cooling material layer 121 by setting the pixel opening 1211 to an inverted step shape, thereby slowing down the volatilization rate of the organic light-emitting material 122 at more edges, and increasing the difference between the volatilization rate at the center of the organic light-emitting material 122 and the volatilization rate at the edge, thereby reducing the possibility of the organic light-emitting material 122 having a coffee ring appearance, thereby improving the display quality of the display panel 1.

[0091] refer to Figures 7 to 9 As shown, the embodiment of the present disclosure provides a method for manufacturing a display panel 1, comprising:

[0092] S1. Provide a driving substrate 11.

[0093] S2. Form a thermoelectric cooling material layer 121 on the driving substrate 11. The thermoelectric cooling material layer 121 is electrically connected to the driving substrate 11, and the thermoelectric cooling material layer 121 has a plurality of pixel openings 1211 arranged in an array along the row direction X1 and the column direction X2.

[0094] S3 , dripping the corresponding organic light-emitting material 122 into each pixel opening 1211 , and curing the organic light-emitting material 122 .

[0095] Specifically, a layer of thermoelectric cooling material layer 121 may be coated on the driving substrate 11 to form the thermoelectric cooling material layer 121. The material of the thermoelectric cooling material layer 121 in the embodiment of the present disclosure may include at least one of bismuth telluride, sodium bismuth titanate-based ceramic material, barium strontium titanate, barium strontium niobate ceramic, barium strontium zirconate titanate ceramic, silver niobate ceramic, and sodium bismuth titanate-based film, so that the thermoelectric cooling material layer 121 can reduce the temperature under the drive of the voltage applied by the driving substrate 11.

[0096] Further, such as Figure 8 and Fig. 9 As shown, the thermoelectric cooling material layer 121 can be etched to form a plurality of pixel openings 1211 arranged in an array in the row direction X1 and the column direction X2, and then the organic light-emitting material 122 can be dripped into each pixel opening 1211. The method of dripping the organic light-emitting material 122 into the pixel opening 1211 can be an inkjet printing method, that is, a droplet nozzle containing the organic light-emitting material 122 is arranged directly opposite to each pixel opening 1211, so that the organic light-emitting material 122 drips into the pixel opening 1211, but it is not limited thereto, and the organic light-emitting material 122 can also be dripped into the pixel opening 1211 by other solution methods, which can be determined according to actual conditions.

[0097] In the disclosed embodiment, an electrical connection is formed between the thermoelectric cooling material layer 121 and the driving substrate 11 , so that the driving substrate 11 can provide a voltage to the thermoelectric cooling material layer 121 to reduce the temperature of the thermoelectric cooling material layer 121 .

[0098] Specifically, during the curing process of the organic light-emitting material 122, the driving substrate 11 provides a first target voltage to the thermoelectric cooling material layer 121, so that the thermoelectric cooling material layer 121 is cooled to the first target temperature, and the temperature at the edge of the organic light-emitting material 122 is lower than the temperature at the center, so that the volatilization rate at the center of the organic light-emitting material 122 is greater than the volatilization rate at the edge, which can avoid the organic light-emitting material 122 from generating capillary flow from the center to the edge, so that a large amount of organic solute 1222 is accumulated at the edge of the organic light-emitting material 122, thereby reducing the possibility of the organic light-emitting material 122 curing to form a thin center and thick edge morphology, so as to improve the display quality of the display panel 1.

[0099] It should be noted that the driving substrate 11 can provide the first target voltage to the thermoelectric cooling material layer 121 before the organic light-emitting material 122 drips into the pixel opening 1211, so as to pre-cool the thermoelectric cooling material layer 121 and stably maintain the thermoelectric cooling material layer 121 at the first target temperature. When the organic light-emitting material 122 drips into the pixel opening 1211, the edge of the organic light-emitting material 122 can be rapidly cooled by the low temperature of the thermoelectric cooling material layer 121, thereby improving the manufacturing efficiency of the display panel 1. However, it is not limited to this. The driving substrate 11 can also provide the first target voltage to the thermoelectric cooling material layer 121 after the organic light-emitting material 122 drips into the pixel opening 1211, so as to shorten the time for the driving substrate 11 to provide the first target voltage to the thermoelectric cooling material layer 121, thereby reducing energy consumption and reducing the manufacturing cost of the display panel 1.

[0100] Furthermore, the manufacturing method of the display panel 1 may also include: during the curing process of the organic light-emitting material 122, detecting the cured thickness at the center of the organic light-emitting material 122; when the cured thickness at the center of the organic light-emitting material 122 is greater than or equal to the set thickness value, stopping providing the first target voltage to the thermoelectric cooling material layer 121.

[0101] In the embodiment of the present disclosure, when the driving substrate 11 provides the first target voltage to the thermoelectric cooling material layer 121, the solidified thickness at the center of the organic light-emitting material 122 during the solidification process is measured, and when the solidified thickness at the center of the organic light-emitting material 122 is greater than or equal to the set thickness value, the first target voltage is stopped to be provided to the thermoelectric cooling material layer 121, thereby ensuring that the thickness at the center of the organic light-emitting material 122 after full solidification is greater than or equal to the thickness at the edge thereof, reducing the possibility of the organic light-emitting material 122 having a coffee ring appearance, and also reducing the power supply time to the thermoelectric cooling material layer 121, so as to reduce the energy loss of the driving substrate 11, and further reduce the manufacturing cost of the display panel 1. In addition, after the driving substrate 11 stops supplying power to the thermoelectric cooling material layer 121, the temperature of the thermoelectric cooling material layer 121 rises, and the temperature at the edge of the organic light-emitting material 122 rises, thereby accelerating the overall solidification rate of the organic light-emitting material 122, so as to improve the manufacturing efficiency of the display panel 1.

[0102] In addition, the manufacturing method of the display panel 1 may also include: S4, during the curing process of the organic light-emitting material 122, using the driving substrate 11 to provide a first target voltage to the thermoelectric cooling material layer 121, and the thermoelectric cooling material layer 121 is reduced to a first target temperature under the action of the first target voltage, so that the temperature at the edge of the organic light-emitting material 122 is lower than the temperature at its center.

[0103] In order to avoid the temperature of the display panel 1 being greater than the temperature setting value, which may cause the life of the display panel 1 to be shortened and the display panel 1 to experience problems such as reduced display brightness, color shift, and screen burn-in, the embodiment of the present disclosure can monitor the temperature of the display panel 1 in real time. When the temperature of the display panel 1 is greater than the temperature setting value, the driving substrate 11 can apply a second target voltage to the thermoelectric cooling material layer 121 to cool the thermoelectric cooling material layer 121 to the second target temperature, and make the temperature of the display panel 1 less than or equal to the temperature setting value.

[0104] The present disclosure provides a display device, which includes a controller and any display panel 1 as described above. The controller is connected to a driving substrate 11 and is used to control the driving substrate 11 to pass a first target voltage to a thermoelectric cooling material layer 121 during the curing process of an organic light-emitting material 122 .

[0105] Furthermore, the display device in the embodiment of the present disclosure may also include a temperature detector, which is connected to the controller and is used to detect the temperature of the display panel 1 and transmit the detection result to the controller in real time. The controller can control the driving substrate 11 to power on or off the thermoelectric cooling material layer 121 according to the received detection result.

[0106] Specifically, when the temperature detector detects that the temperature of the display panel 1 is greater than the temperature setting value, the controller can control the driving substrate 11 to provide the second target voltage to the thermoelectric cooling material layer 121, and the thermoelectric cooling material layer 121 is cooled to the second target temperature under the action of the second target voltage, and the temperature of the display panel 1 is less than or equal to the temperature setting value. When the temperature detector detects that the temperature of the organic light-emitting material 122 is less than or equal to the temperature setting value, the controller can control the driving substrate 11 to stop providing voltage to the thermoelectric cooling material layer 121.

[0107] The display device in the embodiment of the present disclosure may further include a curing thickness detector, which can be used to detect the curing thickness of the center of the organic light-emitting material 122 during the curing process in real time, and transmit the detection result to the controller in real time. The controller can control the driving substrate 11 to power on or off the thermoelectric cooling material layer 121 according to the received curing thickness at the center of the organic light-emitting material 122. Specifically, before the curing thickness at the center of the organic light-emitting material 122 reaches the thickness setting value, the controller can control the driving substrate 11 to provide the first target voltage to the thermoelectric cooling material layer 121. When the curing thickness at the center of the organic light-emitting material 122 reaches the thickness setting value, the controller can control the driving substrate 11 to stop providing voltage to the thermoelectric cooling material layer 121.

[0108] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0109] It should be noted that "upper", "lower" and the like are only used for distinction to facilitate description and do not limit the orientation of the embodiments of the present invention. In the present disclosure, unless otherwise clearly specified and limited, the terms "connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral whole; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0110] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0111] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and cannot be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present disclosure. Therefore, any changes or modifications made in accordance with the claims and specification of the present disclosure shall fall within the scope covered by the patent of the present disclosure.

Claims

1. A display panel, characterized in that: include: Driver substrate; A display function layer is formed on the driving substrate, the display function layer includes a thermoelectric cooling material layer and an organic light-emitting material, the thermoelectric cooling material layer has a plurality of pixel openings arranged in an array along a row direction and a column direction, the thermoelectric cooling material layer is electrically connected to the driving substrate, and the organic light-emitting material is formed in each of the pixel openings; The driving substrate is at least capable of providing a first target voltage to the thermoelectric cooling material layer during the curing process of the organic light-emitting material, and the thermoelectric cooling material layer is capable of being reduced to a first target temperature under the action of the first target voltage so that the temperature at the edge of the organic light-emitting material is lower than the temperature at the center thereof.

2. The display panel according to claim 1, characterized in that: During the curing process of the organic light-emitting material: the driving substrate can also stop providing the first target voltage to the thermoelectric cooling material layer when the curing thickness at the center of the organic light-emitting material reaches a set thickness value.

3. The display panel according to claim 1, characterized in that: The driving substrate can also provide a second target voltage to the thermoelectric cooling material layer when the temperature of the display panel is greater than a temperature setting value. The thermoelectric cooling material layer can be reduced to a second target temperature under the action of the second target voltage to make the temperature of the display panel less than or equal to the temperature setting value.

4. The display panel according to claim 3, characterized in that: The first target voltage is the same as the second target voltage, and the first target temperature is the same as the second target temperature; and / or The first target temperature ranges from -50°C to 0°C, and the second target temperature ranges from -50°C to 0°C; and / or The material of the thermoelectric cooling material layer includes at least one of bismuth telluride, sodium bismuth titanate-based ceramic material, barium strontium titanate, barium strontium niobate ceramic, barium strontium zirconate titanate ceramic, silver niobate ceramic, and sodium bismuth titanate-based film.

5. The display panel according to claim 1, characterized in that: The top end area of ​​the pixel opening is larger than the bottom end area of ​​the pixel opening, and the orthographic projection of the bottom end of the pixel opening on the driving substrate is located within the orthographic projection of the top end of the pixel opening on the driving substrate.

6. The display panel according to claim 5, characterized in that: The vertical cross section of the pixel opening is an isosceles trapezoid; or The pixel opening comprises a plurality of opening segments which are arranged in sequence in the vertical direction and have a coaxial line, and the top end area of ​​the opening segment is greater than or equal to the bottom end area of ​​the opening segment; Wherein, along the direction away from the driving substrate, the maximum areas of the plurality of opening sections increase successively, and a step surface is formed at the junction of adjacent opening sections.

7. A method for manufacturing a display panel, characterized in that: include: Providing a driving substrate; Forming a thermoelectric cooling material layer on the driving substrate, the thermoelectric cooling material layer is electrically connected to the driving substrate, and the thermoelectric cooling material layer has a plurality of pixel openings arranged in an array along a row direction and a column direction; Dropping a corresponding organic light-emitting material into each of the pixel openings, and curing the organic light-emitting material; During the curing of the organic light-emitting material, the driving substrate is used to provide a first target voltage to the thermoelectric cooling material layer. Under the action of the first target voltage, the thermoelectric cooling material layer is reduced to a first target temperature, so that the temperature at the edge of the organic light-emitting material is lower than the temperature at the center thereof.

8. The method for manufacturing a display panel according to claim 7, characterized in that: During the curing process of the organic light-emitting material, detecting the cured thickness at the center of the organic light-emitting material; When the solidified thickness at the center of the organic light-emitting material is greater than or equal to the set thickness value, supplying the first target voltage to the thermoelectric cooling material layer is stopped.

9. A display device, characterized in that: The display device comprises: The display panel according to any one of claims 1 to 6; The controller is connected to the driving substrate and is used to control the driving substrate to provide a first target voltage to the thermoelectric cooling material layer during the curing process of the organic light-emitting material.

10. The display device according to claim 9, characterized in that: Also includes a temperature detector connected to the controller; Wherein, the temperature detector is used to detect the temperature of the display panel and transmit the temperature detection result to the controller. The controller can provide a second target voltage to the thermoelectric cooling material layer when the temperature of the display panel is greater than the temperature setting value. The thermoelectric cooling material layer can be reduced to a second target temperature under the action of the second target voltage so that the temperature of the display panel is less than or equal to the temperature setting value.

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