Display panel and preparation method therefor

Abstract

A display panel and a preparation method therefor, which belong to the technical field of displays. The display panel comprises: a base substrate, and a light-emitting layer and a compensation layer, which are sequentially arranged on the base substrate in a direction away from the base substrate, wherein the light-emitting layer comprises a plurality of light-emitting units used for emitting light of different colors; and the compensation layer is used for transmitting the light from the plurality of light-emitting units at a first ambient temperature, and adjusting, at a second ambient temperature, the light emission brightness of an area where at least one of the plurality of light-emitting units in the display panel is located, so as to compensate for the difference between change rates of the light emission brightness, at the second ambient temperature relative to at the first ambient temperature, of the areas where the plurality of light-emitting units in the display panel are located.

Description

Display panel and preparation method thereof

[0001] The present application claims priority to the Chinese patent application No. 202410684016.2, filed on May 29, 2024, entitled "Display panel and preparation method thereof", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a display panel and a preparation method thereof. BACKGROUND

[0003] In the technical field of display, a display panel includes a light-emitting layer, the light-emitting layer includes a plurality of light-emitting units for emitting light of different colors, and the light-emitting units can form a display picture when emitting light. SUMMARY

[0004] The present application provides a display panel and a preparation method thereof, which can be used to compensate for light emitted by different light-emitting units of the display panel and reduce the deviation of the display effect of the display panel on the same picture under different ambient temperatures. The technical solution is as follows:

[0005] In a first aspect, the present application provides a display panel, comprising: a substrate, and a light-emitting layer and a compensation layer arranged in sequence in a direction away from the substrate on the substrate;

[0006] The light-emitting layer includes a plurality of light-emitting units for emitting light of different colors;

[0007] The compensation layer is configured to:

[0008] transmit light from the plurality of light-emitting units at a first ambient temperature;

[0009] adjust the light-emitting brightness of the area where at least one light-emitting unit of the plurality of light-emitting units is located in the display panel at a second ambient temperature, so as to compensate for the difference in the change rate of the light-emitting brightness of the area where the plurality of light-emitting units is located in the display panel at the second ambient temperature compared with the first ambient temperature.

[0010] In a possible implementation, for any light-emitting unit of the at least one light-emitting unit, the compensation layer is configured to: at the second ambient temperature, converge light from the light-emitting unit to adjust the light-emitting brightness of the area where the light-emitting unit is located in the display panel.

[0011] In a possible implementation, the compensation layer comprises at least one compensation unit corresponding to each of the at least one light-emitting unit; the compensation unit is configured to be in a first shape to transmit light from the corresponding light-emitting unit at the first ambient temperature, and to be in a second shape to converge light from the corresponding light-emitting unit at the second ambient temperature, the first shape being different from the second shape.

[0012] In a possible implementation, the compensation unit comprises, in sequence and in a direction away from the substrate, a thermal expansion structure and a heat-conducting structure; the heat-conducting structure has a higher thermal conductivity than a film layer on a side of the thermal expansion structure away from the heat-conducting structure; the heat-conducting structure transmits light from the corresponding light-emitting unit at both the first ambient temperature and the second ambient temperature; the thermal expansion structure has a greater expansion degree at the second ambient temperature than at the first ambient temperature.

[0013] In a possible implementation, the compensation unit comprises, in sequence and in a direction away from the substrate, a heat-conducting structure and a thermal contraction structure; the heat-conducting structure has a higher thermal conductivity than a film layer on a side of the thermal contraction structure away from the heat-conducting structure; the heat-conducting structure transmits light from the corresponding light-emitting unit at both the first ambient temperature and the second ambient temperature; the thermal contraction structure has a greater contraction degree at the second ambient temperature than at the first ambient temperature.

[0014] In a possible implementation, the heat-conducting structures in the at least one compensation unit are connected into a heat-conducting layer; the compensation layer further comprises a transparent support layer on a side of the heat-conducting layer close to other structures in the compensation unit; the other structures are structures in the compensation unit other than the heat-conducting structures; the transparent support layer has at least one hollow corresponding to each of the at least one compensation unit, and the other structures in the compensation unit are located in the corresponding hollows.

[0015] In a possible implementation, the compensation unit is made of a shape memory material.

[0016] In a possible implementation, the compensation layer further comprises a transparent support layer on a side of the light-emitting layer close to the compensation unit; the transparent support layer has at least one hollow corresponding to each of the at least one compensation unit, and the compensation unit is located in the corresponding hollow.

[0017] In a possible implementation, the at least one light emitting unit includes a first light emitting unit, and the plurality of light emitting units further includes a second light emitting unit other than the at least one light emitting unit; the first light emitting unit corresponds to a larger light emission brightness change rate than the second light emitting unit; for any light emitting unit in the plurality of light emitting units, the light emission brightness change rate of the light emitting unit is C=(B-A) / A, where B is the light emission brightness of the light emitting unit at the second ambient temperature, and A is the light emission brightness of the light emitting unit at the first ambient temperature.

[0018] In a possible implementation, for any light emitting unit in the at least one light emitting unit, the compensation layer is configured to: at the second ambient temperature, reduce the transmittance of light from the light emitting unit, to adjust the light emission brightness of the area in the display panel where the light emitting unit is located.

[0019] In a possible implementation, the at least one light emitting unit includes a third light emitting unit, and the plurality of light emitting units further includes a fourth light emitting unit other than the at least one light emitting unit; the third light emitting unit corresponds to a smaller light emission brightness change rate than the fourth light emitting unit; for any light emitting unit in the plurality of light emitting units, the light emission brightness change rate of the light emitting unit is Z=(Y-X) / X, where Y is the light emission brightness of the light emitting unit at the second ambient temperature, and X is the light emission brightness of the light emitting unit at the first ambient temperature.

[0020] In a possible implementation, the compensation layer is configured to: at the first ambient temperature, be in a transparent state to transmit light from the plurality of light emitting units; and at the second ambient temperature, be in a target color, and the fourth light emitting unit is configured to emit light of the target color.

[0021] In another aspect, the present application provides a display panel and a preparation method thereof.

[0022] A substrate is provided;

[0023] A light emitting layer is formed on the substrate, the light emitting layer including a plurality of light emitting units for emitting light of different colors;

[0024] A compensation layer is formed on a side of the light emitting layer away from the substrate, the compensation layer being configured to:

[0025] At a first ambient temperature, transmit light from the plurality of light emitting units;

[0026] And, adjusting, at a second ambient temperature, light emission brightness of a region in the display panel where at least one of the plurality of light emitting units is located to compensate for a difference in a rate of change of light emission brightness of the region in the display panel where the plurality of light emitting units is located at the second ambient temperature compared to the first ambient temperature.

[0027] In a possible implementation, for any of the at least one light emitting unit, the compensation layer is configured to: at the second ambient temperature, converge light from the light emitting unit to adjust light emission brightness of a region in the display panel where the light emitting unit is located.

[0028] In a possible implementation, the compensation layer includes at least one compensation unit corresponding to each of the at least one light emitting unit; the compensation unit is configured to: at the first ambient temperature, be in a first shape to transmit light from the corresponding light emitting unit; and at the second ambient temperature, be in a second shape to converge light from the corresponding light emitting unit, the first shape being different from the second shape.

[0029] In a possible implementation, the compensation layer includes a thermal expansion structure and a heat conduction structure, and the compensation layer is formed on a side of the light emitting layer away from the substrate; the compensation layer includes: the thermal expansion structure is formed on the side of the light emitting layer away from the substrate, and the heat conduction structure is formed on a side of the thermal expansion structure away from the substrate; the thermal expansion structure and the heat conduction structure are arranged in a spaced manner, a thermal conductivity of the heat conduction structure is higher than that of a film layer on a side of the thermal expansion structure away from the heat conduction structure; the heat conduction structure transmits light from the corresponding light emitting unit at both the first ambient temperature and the second ambient temperature; and an expansion degree of the thermal expansion structure at the second ambient temperature is greater than that at the first ambient temperature.

[0030] In a possible implementation, the compensation layer includes a thermal expansion structure and a heat conduction structure, and the compensation layer is formed on a side of the light emitting layer away from the substrate; the compensation layer includes: the thermal expansion structure is formed on the side of the light emitting layer away from the substrate, and the heat conduction structure is formed on a side of the thermal expansion structure away from the substrate; the thermal expansion structure and the heat conduction structure are arranged in a spaced manner, a thermal conductivity of the heat conduction structure is higher than that of a film layer on a side of the thermal expansion structure away from the heat conduction structure; the heat conduction structure transmits light from the corresponding light emitting unit at both the first ambient temperature and the second ambient temperature; and an expansion degree of the thermal expansion structure at the second ambient temperature is greater than that at the first ambient temperature.

[0031] In a possible implementation, the heat-conductive structures in the at least one compensation unit are connected into a heat-conductive layer; the compensation layer further includes: a transparent support layer located on a side of the heat-conductive layer close to other structures; the other structures are structures in the compensation unit other than the heat-conductive structures; the transparent support layer has at least one hollow corresponding to the at least one compensation unit, and the other structures in the compensation unit are located in the corresponding hollow; in the case where the compensation layer includes thermal expansion structures, the other structures include the thermal expansion structures, and the forming of the compensation layer on the side of the light-emitting layer away from the substrate substrate further includes: forming a transparent support layer on the side of the light-emitting layer away from the substrate substrate; in this case, the forming of the thermal expansion structures on the side of the light-emitting layer away from the substrate substrate includes: forming the thermal expansion structures on the side of the transparent support layer away from the substrate substrate; in the case where the compensation layer includes thermal contraction structures, the other structures include the thermal contraction structures, and the forming of the compensation layer on the side of the light-emitting layer away from the substrate substrate further includes: forming a transparent support layer on the side of the heat-conductive layer away from the substrate substrate; in this case, the forming of the thermal contraction structures on the side of the heat-conductive structure away from the substrate substrate includes: forming the thermal contraction structures on the side of the heat-conductive layer close to the transparent support layer.

[0032] In a possible implementation, the material of the compensation unit is a shape memory material.

[0033] In a possible implementation, the forming of the compensation layer on the side of the light-emitting layer away from the substrate substrate includes: forming at least one initial unit corresponding to each of the at least one light-emitting unit on the side of the light-emitting layer away from the substrate substrate; the material of the initial unit is a shape memory material, and the initial unit has a first shape at a first ambient temperature; the initial unit is heated to a second ambient temperature, and the initial unit is changed from the first shape to a second shape, so as to change the at least one initial unit into at least one compensation unit corresponding to each of the light-emitting units; the compensation unit is used to: transmit light from the corresponding light-emitting unit in the first shape at the first ambient temperature; and converge light from the corresponding light-emitting unit in the second shape at the second ambient temperature.

[0034] In a possible implementation, the forming the compensation layer on the side of the light-emitting layer away from the substrate substrate includes: forming a transparent support layer on the side of the light-emitting layer away from the substrate substrate; and forming at least one initial unit corresponding to each of the at least one light-emitting unit on the side of the light-emitting layer away from the substrate substrate, including: forming the at least one initial unit on the side of the transparent support layer away from the substrate substrate; the transparent support layer has at least one hollow corresponding to the at least one compensation unit, and the compensation unit is located in the corresponding hollow.

[0035] In a possible implementation, the at least one light-emitting unit includes a first light-emitting unit, and the plurality of light-emitting units further include a second light-emitting unit different from the at least one light-emitting unit; the corresponding light-emitting brightness change rate of the first light-emitting unit is greater than the corresponding light-emitting brightness change rate of the second light-emitting unit; for any light-emitting unit in the plurality of light-emitting units, the corresponding light-emitting brightness change rate C of the light-emitting unit is (B-A) / A; wherein B is the light-emitting brightness of the light-emitting unit at the second ambient temperature, and A is the light-emitting brightness of the light-emitting unit at the first ambient temperature.

[0036] In a possible implementation, for any light-emitting unit in the at least one light-emitting unit, the compensation layer is configured to: at the second ambient temperature, reduce the transmittance of the light from the light-emitting unit, so as to adjust the light-emitting brightness of the area in the display panel where the light-emitting unit is located.

[0037] In a possible implementation, the at least one light-emitting unit includes a third light-emitting unit, and the plurality of light-emitting units further include a fourth light-emitting unit different from the at least one light-emitting unit; the corresponding light-emitting brightness change rate of the third light-emitting unit is less than the corresponding light-emitting brightness change rate of the fourth light-emitting unit; for any light-emitting unit in the plurality of light-emitting units, the corresponding light-emitting brightness change rate Z of the light-emitting unit is (Y-X) / X; wherein Y is the light-emitting brightness of the light-emitting unit at the second ambient temperature, and X is the light-emitting brightness of the light-emitting unit at the first ambient temperature.

[0038] In a possible implementation, the compensation layer is configured to: at the first ambient temperature, be in a transparent state to transmit the light from the plurality of light-emitting units; and at the second ambient temperature, be in a target color, and the fourth light-emitting unit is configured to emit the light of the target color. BRIEF DESCRIPTION OF DRAWINGS

[0039] FIG. 1 is a schematic diagram of a structure of a display panel provided by an embodiment of the present application;

[0040] FIG. 2 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0041] FIG. 3 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0042] FIG. 4 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0043] FIG. 5 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0044] FIG. 6 is a schematic diagram of a light gathering scene of a compensation unit according to an embodiment of the present application;

[0045] FIG. 7 is a schematic diagram of another light gathering scene of a compensation unit according to an embodiment of the present application;

[0046] FIG. 8 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0047] FIG. 9 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0048] FIG. 10 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0049] FIG. 11 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0050] FIG. 12 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0051] FIG. 13 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0052] FIG. 14 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0053] FIG. 15 is a schematic diagram of another structure of a display panel according to an embodiment of the present application;

[0054] FIG. 16 is a schematic diagram of a light path change according to an embodiment of the present application;

[0055] FIG. 17 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present application. DETAILED DESCRIPTION

[0056] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0057] The terms "first", "second", and the like, if any, in the description of this application are used to distinguish similar objects, and do not necessarily have to describe a particular order or sequence. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are only examples of display panels and manufacturing methods thereof consistent with some aspects of the present application.

[0058] With the development of display technology, the application range of display panels is becoming wider and wider. A display panel is a device or apparatus (the display panel can also be referred to as a display apparatus) capable of converting electrical energy into light energy. The display apparatus can be: electronic paper, an organic light-emitting diode panel, a light-emitting diode panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, or any product or component with a display function. The main function of the display panel is to convert electrical energy into visible light to display a picture. The light-emitting layer is the light-emitting part of the display panel, and the display panel emits light of different colors through various light-emitting units inside the light-emitting layer to display a picture. However, there are differences in the light-emitting materials of various light-emitting units in the light-emitting layer, which result in different responses of different light-emitting units to temperature changes. When the ambient temperature changes, the light-emitting materials in different light-emitting units will have different degrees of performance degradation. For example, some light-emitting materials may rapidly reduce the light-emitting efficiency at high temperatures, while other materials may be relatively stable. The inconsistent degree of performance degradation leads to a deviation in the display effect of the display panel on the same picture at different ambient temperatures.

[0059] Referring to FIG. 1, an embodiment of the present application provides a display panel for reducing the deviation in the display effect of the display panel on the same picture at different ambient temperatures. The display panel comprises: a substrate 101, and a light-emitting layer 102 and a compensation layer 103 arranged in sequence on the substrate 101 in a direction away from the substrate 101; the light-emitting layer 102 comprises various light-emitting units 1021 for emitting light of different colors; and the compensation layer 103 is configured to: at a first ambient temperature, transmit light from the various light-emitting units 1021; and at a second ambient temperature, adjust the light-emitting brightness of a region in which at least one light-emitting unit 1021 of the various light-emitting units 1021 is located in the display panel, to compensate for the difference in the change rate of the light-emitting brightness of the region in which the various light-emitting units 1021 are located in the display panel at the second ambient temperature compared with the first ambient temperature.

[0060] The substrate 101 provides stable support for the entire display panel. The material of the substrate 101 is not limited in the present application, for example, the material of the substrate 101 can be silicon, silicon dioxide or other materials.

[0061] On the substrate 101, a light-emitting layer 102 is disposed in a direction away from the substrate 101, i.e., a direction of the display panel facing the user. The light-emitting layer 102 contains a plurality of light-emitting units 1021 capable of emitting light of different colors, thereby realizing multi-color display of the display panel. Exemplarily, the plurality of light-emitting units 1021 can include at least two of red light-emitting units for emitting red light, green light-emitting units for emitting green light, and blue light-emitting units for emitting blue light. Optionally, the light-emitting layer 102 further includes isolation structures 1022 for separating adjacent two light-emitting units 1021, thereby reducing interference between the adjacent two light-emitting units 1021. The light-emitting unit 1021 can be an OLED (Organic Light-Emitting Diode), an LED (Light Emitting Diode), or a Micro LED (Micro Light Emitting Diode), etc. The light-emitting unit 1021 emits light of different colors, such as red light, green light, or blue light, by current driving.

[0062] A compensation layer 103 is located above the light-emitting layer 102, for adjusting light-emitting brightness of the display panel at the second ambient temperature.

[0063] Exemplarily, at the first ambient temperature, the compensation layer 103 transmits light from the plurality of light-emitting units 1021 without affecting the brightness and color of the light, ensuring normal display of the display panel. The first ambient temperature can be room temperature, or a temperature range freely set by the user.

[0064] When the ambient temperature changes to a second ambient temperature, the luminous brightness of different light emitting units 1021 is affected to different degrees. In this way, the light emitted by different light emitting units 1021 at the second ambient temperature is different from the light emitted at the first ambient temperature, resulting in different changes in the luminous brightness of the regions in the display panel where different light emitting units 1021 are located at the second ambient temperature compared with the first ambient temperature, and further resulting in differences in the display effect of the display panel on the same picture at the first ambient temperature and at the second ambient temperature. At the second ambient temperature, the compensation layer 103 compensates for the difference in the change rate of the luminous brightness of the regions in the display panel where different light emitting units are located at the second ambient temperature compared with the first ambient temperature by adjusting the luminous brightness of the region where at least one light emitting unit 1021 is located, so that the display effect of the entire display panel at different temperatures tends to be consistent. It can be understood that the second ambient temperature can be an ambient temperature that is lower or higher than the first ambient temperature, and the embodiments of the present application are described by taking the second ambient temperature as an ambient temperature that is higher than the first ambient temperature. The at least one light emitting unit can be all light emitting units or part of the light emitting units, and the embodiments of the present application do not limit this.

[0065] Optionally, the above content takes the second ambient temperature being higher than the first ambient temperature as an example, in this case, if the ambient temperature is lower than the first ambient temperature, the display panel can also have low-temperature color deviation. To solve this problem of low-temperature color deviation, a heating circuit can be used to heat the display panel to avoid low-temperature color deviation of the display panel in a low-temperature environment. For example, a temperature sensor is added to detect the temperature of the display panel, and the display panel is heated when the temperature of the display panel is lower than a low-temperature threshold. Of course, in the embodiments of the present application, the second ambient temperature can also be lower than the first ambient temperature, in which case, the compensation layer can be used to compensate for the difference in the change rate of the luminous brightness of the regions in the display panel where multiple light emitting units 1021 are located at the second ambient temperature compared with the first ambient temperature; and it can be unnecessary to add a temperature sensor to detect the temperature of the display panel and to heat the display panel when the temperature of the display panel is lower than a low-temperature threshold.

[0066] The compensation layer 103 can have various implementation manners, and the compensation layer can be implemented by some special materials to realize the function of the compensation layer 103 in the above embodiments. The embodiments of the present application do not limit these special materials, which can be thermal expansion materials, thermal contraction materials, shape memory materials, or color-changing materials, etc. In addition, the compensation layer 103 can adjust the luminous brightness of the region where the light emitting unit is located in various ways at the second ambient temperature, such as by changing the transmittance or the degree of divergence of the light emitted by the light emitting unit 1021 to adjust the luminous brightness of the region in the display panel where the light emitting unit 1021 is located.

[0067] The following will be respectively illustrated two ways of changing the transmittance or the degree of divergence of the light emitted by the light emitting unit 1021.

[0068] (1) In the case of changing the degree of divergence of the light emitted by the light emitting unit 1021 for the compensation layer 103, in one possible implementation, for any one of the at least one light emitting unit 1021, the compensation layer 103 is configured to converge the light from the light emitting unit 1021 at the second ambient temperature to adjust the light emitting brightness of the area in the display panel where the light emitting unit 1021 is located.

[0069] At the second ambient temperature, the compensation layer 103 can converge the light from the light emitting unit 1021 through a specific optical structure. The material of the specific optical structure in the compensation layer 103 can be one or more materials with special optical properties, such as magnesium oxide, forsterite (Mg2SiO4), aluminum oxide, stabilized zirconium oxide (ZrO2), enstatite (MgSiO3), thorium dioxide, beryllium oxide (BeO), spinel (MgAl2O4), chrysoberyl (BeAl2O4), etc. These materials in the compensation layer 103 can form different optical structures at different ambient temperatures to change the degree of convergence of the light emitted by the light emitting unit 1021 at different ambient temperatures. For example, these materials in the compensation layer 103 can form a structure similar to a flat glass at the first ambient temperature, and form a lens structure at the second ambient temperature, wherein the lens structure can control the propagation path of the light to achieve convergence of the light.

[0070] When the ambient temperature changes, the materials in the compensation layer 103 will change accordingly, which will change the optical properties of the compensation layer 103. The change can be a change in structure, and the change at different ambient temperatures is different, so that the compensation layer 103 can adaptively adjust according to the optical requirements at different temperatures.

[0071] Referring to another structure schematic diagram of a display panel shown in FIG. 2, the compensation layer includes at least one compensation unit 1031 corresponding to each of the at least one light emitting unit 1021; the compensation unit 1031 is configured to transmit the light from the corresponding light emitting unit 1021 at the first ambient temperature; and converge the light from the corresponding light emitting unit 1021 at the second ambient temperature. It can be understood that the compensation layer can also be an integral layer structure, and the compensation layer is not divided into the at least one compensation unit 1031 described above, but the adjustment of the light emitted by the at least one light emitting unit described above is realized through the integral layer structure.

[0072] When the ambient temperature changes from the first ambient temperature to the second ambient temperature, the light-emitting unit of red color has a higher attenuation rate of light-emitting brightness than other light-emitting units, and therefore the compensation unit 1031 corresponding to the light-emitting unit of red color is used to improve the light-emitting brightness of the area in the display panel where the light-emitting unit of red color is located. In FIG. 2, the compensation unit 1031 is provided for each light-emitting unit 1021, which is only an example. For different light-emitting units 1021, the compensation unit 1031 corresponding to the light-emitting unit has different light-converging degrees at the second ambient temperature due to different attenuation rates. For example, the light-converging degree of the compensation unit corresponding to the light-emitting unit of red color is higher than that of the compensation unit corresponding to the light-emitting unit of other colors. Referring to FIG. 3, another structure diagram of a display panel is shown, in which the compensation unit 1031 is provided only for a light-emitting unit of one color.

[0073] At the first ambient temperature, the compensation unit 1031 is used to transmit the light from the corresponding light-emitting unit 1021. For example, the compensation unit 1031 is a cuboid in FIG. 2, and the compensation unit 1031 does not converge the light from the corresponding light-emitting unit, thereby ensuring that the display panel has accurate color and brightness performance at the first ambient temperature. When the ambient temperature changes to the second ambient temperature, the light-emitting performance of different light-emitting units 1021 is affected to different degrees, resulting in a change in the brightness of the light emitted by the light-emitting unit. At this time, the compensation unit 1031 changes the optical characteristics, for example, the light-converging degree, of the light from the corresponding light-emitting unit, thereby converging the light from the corresponding light-emitting unit 1021. By converging the light from the corresponding light-emitting unit 1021, the compensation unit 1031 can enhance the light-emitting brightness of the area in the display panel where the light-emitting unit 1021 is located.

[0074] The compensation unit 1031 can adaptively adjust the optical characteristics according to the change of the ambient temperature, thereby realizing dynamic regulation of the light-emitting brightness of the area in the display panel where the light-emitting unit 1021 corresponding to the compensation unit is located. The adaptive adjustment capability of the compensation unit 1031 makes the display panel have higher adaptability and stability.

[0075] In a possible implementation, the compensation unit 1031 is used to present a first shape at the first ambient temperature to transmit the light from the corresponding light-emitting unit 1021, and present a second shape at the second ambient temperature to converge the light from the corresponding light-emitting unit 1021, the first shape being different from the second shape.

[0076] At the first ambient temperature, the compensation unit 1031 assumes a first shape, such as the cuboid in FIG. 2. The design of the first shape ensures that the compensation unit is capable of allowing light rays from the corresponding light emitting unit 1021 to pass through almost unimpeded. It can also be said that at this time the compensation unit 1031 functions as a simple transparent window, almost not having a significant impact on the direction, intensity or color of the light. When the ambient temperature changes to a second ambient temperature, the compensation unit 1031 will respond to the temperature change and change shape to a second shape. The change in shape enables the compensation unit 1031 to function as a light converging unit. Referring to FIG. 4, the second shape of the compensation unit 1031 can be a convex lens that protrudes towards the side away from the substrate base plate. Referring to FIG. 6, the convex lens is capable of focusing the light rays from the corresponding light emitting unit 1021 and enhancing the light output brightness of the area in the display panel where the light emitting unit is located. The second shape can also be a concave lens that is recessed towards the side away from the substrate base plate. Referring to FIG. 5, the second shape of the compensation unit 1031 can be a concave lens that is recessed towards the side away from the substrate base plate. Referring to FIG. 7, the concave lens is also capable of focusing the light rays from the corresponding light emitting unit 1021 and enhancing the light output brightness of the area in the display panel where the light emitting unit is located.

[0077] The change in shape of the compensation unit 1031 can be achieved by using a material with thermal responsiveness. The material of the compensation unit 1031 is capable of undergoing physical changes when the temperature changes, thereby causing a change in shape. For example, the material with thermal responsiveness is a thermal expansion material, a thermal contraction material or a shape memory material.

[0078] (1.1) In the case where the material with thermal responsiveness is a shape memory material, the compensation unit 1031 can be made of a shape memory material that is capable of memorizing shapes to assume a first shape at a first ambient temperature and a second shape at a second ambient temperature.

[0079] The shape memory material can be shaped into any shape at one temperature and return to the original shape at another temperature. The shape memory material has good repeatability and stability and can undergo shape memory cycles multiple times without failure. When the compensation unit is made of a shape memory material, it can be shaped into a specific shape, such as the second shape, as needed, so that the shape memory material is in the first shape at the first temperature and in the second shape at the second temperature. Referring to FIG. 8, which shows a structural schematic diagram of another display panel, the compensation layer further includes a transparent support layer 1032 located on the side of the light emitting layer 102 close to the compensation unit; the transparent support layer 1032 has at least one hollow 10321 corresponding to at least one compensation unit, and the compensation unit is located in the corresponding hollow. The shape memory material includes, but is not limited to, one or more of titanium-nickel-copper alloy, titanium-nickel-iron alloy, titanium-nickel-chromium alloy, nickel-aluminum alloy, iron-manganese-silicon alloy and copper-zinc alloy, etc.

[0080] The transparent support layer 1032 is used to provide stable physical support for the compensation unit. Since the transparent support layer 1032 is located near the light-emitting layer 102, the transparent support layer 1032 has good light transmittance to ensure that the light emitted by the light-emitting layer 102 can pass through smoothly and will not be affected by the presence of the support layer. In FIG. 8, the shape memory material is in the second shape, i.e., the convex lens shape. The first shape of the shape memory material can be a cuboid as shown in FIG. 9.

[0081] (1.2) In the case where the material with thermal responsiveness is a thermal expansion material, referring to another display panel shown in FIG. 10, the compensation unit includes: a thermal expansion structure 10311 and a heat conduction structure 10312 arranged in sequence and spaced apart in a direction away from the substrate 101; the thermal conductivity of the heat conduction structure 10312 is higher than the thermal conductivity of the film layer on the side of the heat conduction structure 10312 away from the thermal expansion structure 10311; the heat conduction structure 10312 transmits light from the corresponding light-emitting unit 1021 at both the first ambient temperature and the second ambient temperature; the thermal expansion structure 10311 has a greater expansion degree at the second ambient temperature than at the first ambient temperature.

[0082] The thermal expansion structure 10311 adopts a thermal expansion material. The thermal expansion structure 10311 is a structure sensitive to temperature and has different expansion degrees at different temperatures. For example, at the first ambient temperature, the thermal expansion structure 10311 has a small expansion degree (or almost no expansion), and the thermal expansion structure 10311 remains in a relatively stable form. However, when the ambient temperature rises to the second ambient temperature, the expansion degree of the thermal expansion structure 10311 increases. The change in the expansion degree of the thermal expansion structure 10311 can change the shape of the thermal expansion structure 10311, and thus change the overall shape of the compensation unit including the thermal expansion structure 10311 and the heat conduction structure 10312, thereby affecting the effect of the compensation unit on light. The thermal expansion material can be magnesium oxide, forsterite, aluminum oxide, stabilized zirconia, enstatite, thorium dioxide, beryllium oxide, spinel, or chrysoberyl, etc.

[0083] The heat-conducting structure 10312 is located on the side of the heat-expanding structure 10311 away from the substrate 101 and is spaced from the heat-expanding structure 10311, thereby leaving space for the expansion of the heat-expanding structure 10311. The heat-conducting coefficient of the heat-conducting structure 10312 is higher than that of the film layer (e.g., the light-emitting layer 102) on the side of the heat-expanding structure 10311 away from the heat-conducting structure 10312, so that at the same ambient temperature, the temperature of the heat-conducting structure 10312 is higher than that of the film layer on the side of the heat-expanding structure 10311 away from the heat-conducting structure 10312. In this way, the expansion degree of the side of the heat-expanding structure 10311 close to the heat-conducting structure 10312 is greater than that of the side away from the heat-conducting structure 10312, thereby making the heat-expanding structure 10311 form a convex lens as shown in FIG. 4, thereby playing a role of converging light. The material of the heat-conducting structure 10312 can be transparent silicone, resin, aluminum nitride, or aluminum oxide, etc.

[0084] (1.3) In the case where the material with thermal responsiveness is a heat-shrinking material, referring to another display panel shown in FIG. 11, the compensation unit includes: the heat-conducting structure 10312 and the heat-shrinking structure 10313 arranged in sequence in the direction away from the substrate 101; the heat-conducting coefficient of the heat-conducting structure 10312 is higher than that of the film layer on the side of the heat-shrinking structure 10313 away from the heat-conducting structure 10312; the heat-conducting structure 10312 transmits the light from the corresponding light-emitting unit 1021 at both the first ambient temperature and the second ambient temperature; and the shrinkage degree of the heat-shrinking structure 10313 at the second ambient temperature is greater than that at the first ambient temperature.

[0085] The heat-conducting structure 10312 is located on the side of the heat-shrinking structure 10313 close to the substrate 101. The heat-conducting coefficient of the heat-conducting structure 10312 is higher than that of the film layer, e.g., the encapsulating layer (not shown in FIG. 11), on the side of the heat-shrinking structure 10313 away from the heat-conducting structure 10312, so that at the same ambient temperature, the temperature of the heat-conducting structure 10312 is higher than that of the film layer on the side of the heat-shrinking structure 10313 away from the heat-conducting structure 10312. In this way, the shrinkage degree of the side of the heat-shrinking structure 10313 close to the heat-conducting structure 10312 is greater than that of the side away from the heat-conducting structure 10312, thereby forming a concave lens as shown in FIG. 5, thereby playing a role of converging light. The heat-shrinking material can be polyvinyl chloride, polyethylene, polypropylene, and polyester, etc.

[0086] Referring to another display panel shown in FIG. 12, in a possible implementation, the heat-conducting structures in the at least one compensation unit are connected into a heat-conducting layer X; the compensation layer further includes a transparent support layer 1032 located on a side of the heat-conducting layer X close to other structures in the compensation unit, such as a thermal expansion structure or a thermal contraction structure. The transparent support layer 1032 has at least one hollow 10321 corresponding to the at least one compensation unit, and the other structure in the compensation unit is located in the corresponding hollow 10321.

[0087] The transparent support layer 1032 is located on a side of the heat-conducting layer X and close to the other structure, and the transparent support layer 1032 can be used to conduct heat in the environment to the heat-conducting layer X. The transparent support layer 1032 is designed with at least one hollow 10321 corresponding to the compensation unit. The hollow is used to accommodate the thermal expansion structure 10311 in the compensation unit, thereby leaving space for the thermal expansion structure 10311 to change into the second shape. Exemplarily, for the display panel shown in FIG. 12, the thermal expansion structure changes into the second shape at the second environmental temperature, obtaining the display panel shown in FIG. 13.

[0088] Optionally, referring to another display panel shown in FIG. 14, the compensation unit includes a thermal contraction structure 10313, and the hollow is used to place the thermal contraction structure 10313. For the display panel shown in FIG. 14, the thermal expansion structure changes into the second shape at the second environmental temperature, obtaining the display panel shown in FIG. 15.

[0089] In a possible implementation, the at least one light-emitting unit includes a first light-emitting unit, and the plurality of light-emitting units further includes a second light-emitting unit different from the at least one light-emitting unit; the light-emitting brightness change rate corresponding to the first light-emitting unit is greater than the light-emitting brightness change rate corresponding to the second light-emitting unit; for any light-emitting unit in the plurality of light-emitting units, the light-emitting brightness change rate C=(B-A) / A corresponding to the light-emitting unit; wherein B is the light-emitting brightness of the light-emitting unit at the second environmental temperature, and A is the light-emitting brightness of the light-emitting unit at the first environmental temperature.

[0090] The light-emitting units are divided into first light-emitting units and second light-emitting units. Taking the first light-emitting units as red light-emitting units and the second light-emitting units as blue light-emitting units as an example. The light-emitting brightness change rate C is used as an index to quantify the degree of change of the light-emitting brightness of the light-emitting unit at different environmental temperatures. Taking the first environmental temperature less than the second environmental temperature as an example, if B is greater than A (that is, the brightness increases when the temperature rises), C is a positive number, indicating that the brightness increases as the temperature rises; if B is less than A (that is, the brightness decreases when the temperature rises), C is a negative number, indicating that the brightness decreases as the temperature rises. The greater the absolute value of C, the more significant the change in brightness.

[0091] The light emission brightness change rate C corresponding to the first light emitting unit is greater than the light emission brightness change rate corresponding to the second light emitting unit. When the ambient temperature changes from the first ambient temperature to the second ambient temperature, the light emission brightness of the first light emitting unit changes more significantly. The compensation unit corresponding to the first light emitting unit (for example, a red light emitting unit) is used to compensate the light emission brightness of the area in the display panel where the red light emitting unit is located, thereby reducing the difference between the light emission brightness change rates of the areas in the display panel where the first light emitting unit and the second light emitting unit are located.

[0092] Exemplarily, at the second ambient temperature, the white screen displayed by the display panel has a color bias towards cyan, then a compensation unit can be arranged above the red light emitting unit to increase the color light intensity of red light; or compensation units can be arranged in both the red light emitting unit and the blue light emitting unit to simultaneously increase the color light intensity of red light and blue light to balance the color of the white screen. If the white screen displayed by the display panel has a color bias towards yellow, then compensation units can be arranged in both the red light emitting unit and the green light emitting unit to increase the brightness of red light and green light for improvement. If the white screen displayed by the display panel has a color bias towards purple, then compensation units can be arranged in both the blue light emitting unit and the green light emitting unit to increase the brightness of blue light and green light.

[0093] (2) For the case of changing the transmittance of the light emitted by the light emitting unit 1021 by the compensation layer 103, referring to the structural schematic diagram of a display panel shown in FIG. 1, in a possible implementation, for any one of the at least one light emitting unit, the compensation layer is configured to: at the second ambient temperature, reduce the transmittance of the light from the light emitting unit to adjust the light emission brightness of the area in the display panel where the light emitting unit is located.

[0094] The transmittance refers to the passing rate of light through a medium. The compensation layer reduces the transmittance of light by changing the optical properties (such as reflectivity or absorptivity). That is, when the light is emitted from the light emitting unit and passes through the compensation layer, part of the light will be absorbed or reflected by the compensation layer, thereby reducing the light emission brightness of the area in the display panel where the light emitting unit is located. The material selection, structure design and manufacturing process of the compensation layer will affect its ability to adjust the transmittance. For example, a material with temperature sensitivity can be used to manufacture the compensation layer, so that it can automatically adjust the transmittance when the temperature changes. The material of the compensation layer includes, but is not limited to, one or more of temperature-sensitive color-changing ink, temperature-sensitive color-changing powder, temperature-sensitive color-changing paint, etc.

[0095] In a possible implementation, the at least one light emitting unit includes a third light emitting unit, and the plurality of light emitting units further includes a fourth light emitting unit in addition to the at least one light emitting unit; the third light emitting unit corresponds to a smaller light emission brightness change rate than the fourth light emitting unit; for any light emitting unit in the plurality of light emitting units, the light emission brightness change rate Z of the light emitting unit is (Y-X) / X, where Y is the light emission brightness of the light emitting unit at the second ambient temperature, and X is the light emission brightness of the light emitting unit at the first ambient temperature.

[0096] Based on the above formula, the light emission brightness change rate (referred to as Z3) of the third light emitting unit is smaller than the light emission brightness change rate (referred to as Z4) of the fourth light emitting unit. That is, when the ambient temperature changes from the first ambient temperature to the second ambient temperature, the light emission brightness of the region in the display panel where the third light emitting unit is located changes more greatly, and the light emission brightness of the region in the display panel where the fourth light emitting unit is located changes less greatly. Therefore, the third light emitting unit is provided with the compensation unit, the light emission brightness of the region in the display panel where the third light emitting unit is located is reduced, and the influence of the difference between Z3 and Z4 on the display effect of the display panel is reduced.

[0097] In a possible implementation, the compensation layer is configured to be transparent at the first ambient temperature to transmit light from the plurality of light emitting units, and to be of a target color at the second ambient temperature, and the fourth light emitting unit is configured to emit light of the target color. Alternatively, the compensation layer is configured to be transparent at the first ambient temperature to transmit light from the plurality of light emitting units, and to be of a first color at the second ambient temperature, and the fourth light emitting unit is configured to emit light, and the transmittance of the light emitted by the fourth light emitting unit in the compensation layer of the first color is greater than the transmittance of the light emitted by the third light emitting unit in the compensation layer of the first color. The first color can be different from the target color.

[0098] At the first ambient temperature, the compensation layer is in a transparent state, i.e., light from the plurality of light emitting units inside the display panel can pass through the compensation layer almost unhindered to reach the user's eyes, thereby presenting a normal display effect. At the second ambient temperature, the compensation layer presents a target color. The color change is determined by the material properties of the compensation layer. When the ambient temperature reaches or exceeds a certain threshold, the molecular structure or optical properties of the material change, resulting in a color change. At the second ambient temperature, the compensation layer presents the target color, thereby reducing the luminous intensity of the light emitted by the third light emitting unit, and further reducing the difference between Z3 and Z4. Alternatively, a compensation unit can be provided in the fourth light emitting unit. Taking the light emitted by the fourth light emitting unit as an example, the compensation unit changes to red at the second ambient temperature, thereby being able to absorb other colors of light emitted by other light emitting units in the area of the fourth light emitting unit in the display panel, thereby improving the light emitting purity of the fourth light emitting unit.

[0099] It can be understood that the compensation layer 103 can also adjust the luminous intensity of the area of the display panel where the light emitting unit 1021 is located without changing the divergence or transmittance of the light emitted by the light emitting unit 1021. For example, the compensation layer 103 can adjust the luminous intensity of the area of the display panel where the light emitting unit 1021 is located by changing the refractive index of the light emitted by the light emitting unit 1021.

[0100] In this case, the compensation layer 103 can use a material with variable refractive index, for example, the refractive index of the compensation layer 103 to the light emitted by the light emitting unit 1021 at the second ambient temperature is greater than the refractive index of the compensation layer 103 to the light emitted by the light emitting unit 1021 at the first ambient temperature. Referring to a light path change diagram shown in FIG. 16, it can be seen that the light path corresponding to a higher refractive index is closer to the middle of the light emitting unit than the light path corresponding to a lower refractive index, so that the compensation layer with a higher refractive index can increase the luminous intensity of the area of the display panel where the light emitting unit is located.

[0101] Alternatively, the display panel can include other film layers in addition to the aforementioned film layers, such as an encapsulation layer (e.g., the encapsulation layer 104 in FIGS. 14 and 15), which is not limited in the embodiments of the present application.

[0102] In summary, the display panel provided by the embodiments of the present application adjusts the luminous intensity of the area of the display panel where the different light emitting units are located at the second ambient temperature compared to the change rate difference at the first ambient temperature, to reduce the deviation of the display effect of the display panel on the same picture at the first ambient temperature and the second ambient temperature, thereby improving the display effect of the display panel.

[0103] Referring to a flowchart of a method for manufacturing a display panel shown in FIG. 17, the flow of the method for manufacturing a display panel shown in FIG. 17 can be used to manufacture any of the display panels provided in the embodiments of the present application (such as any of the display panels shown in FIGS. 1-5 and 8-16), and the method includes the following steps 1701-1703.

[0104] Step 1701, providing a substrate.

[0105] Step 1702, forming a light-emitting layer on the substrate, the light-emitting layer including a plurality of light-emitting units for emitting light of different colors.

[0106] Step 1703, forming a compensation layer on the side of the light-emitting layer away from the substrate.

[0107] In the embodiments of the present application, the compensation layer is used to: at a first ambient temperature, transmit light from the plurality of light-emitting units; and at a second ambient temperature, adjust the light-emitting brightness of the region where at least one of the plurality of light-emitting units in the display panel is located, to compensate for the difference in the change rate of the light-emitting brightness of the region where the plurality of light-emitting units in the display panel is located at the second ambient temperature compared with the first ambient temperature. Moreover, the compensation layer adjusts the light-emitting brightness of the region where the light-emitting unit is located in various ways at the second ambient temperature, such as by changing the transmittance or the degree of divergence of the light emitted by the light-emitting unit, to achieve the adjustment of the light-emitting brightness of the region where the light-emitting unit in the display panel is located.

[0108] The compensation layer can include: at least one compensation unit corresponding to each of the at least one light-emitting unit; the compensation unit is used to: at a first ambient temperature, assume a first shape to transmit light from the corresponding light-emitting unit; and at a second ambient temperature, assume a second shape to converge light from the corresponding light-emitting unit, the first shape being different from the second shape.

[0109] (1) In a possible implementation, the compensation unit includes a thermal expansion structure and a heat conduction structure, and the process of forming the compensation layer on the side of the light-emitting layer away from the substrate includes: forming the thermal expansion structure on the side of the light-emitting layer away from the substrate, and forming the heat conduction structure on the side of the thermal expansion structure away from the substrate; the thermal expansion structure and the heat conduction structure are arranged in a spaced manner.

[0110] The application can select a suitable thermal expansion material according to the working temperature and thermal expansion coefficient requirement of the thermal expansion structure, and design the pattern and size of the thermal expansion structure according to the design and performance requirement of the thermal expansion structure. The pattern can be continuous, discontinuous or have a specific shape. The application can use physical vapor deposition, chemical vapor deposition, spraying, spin coating or other techniques to form a thermal expansion material layer on the side of the light-emitting layer away from the substrate. Then, the formed thermal expansion material layer is subjected to post-treatment such as heat treatment, laser etching, etc. to improve its performance or adjust its size, thereby obtaining the thermal expansion structure.

[0111] The application can design the pattern and size of the thermal conduction structure according to the thermal conduction requirement of the thermal conduction structure. The pattern of the thermal conduction structure can be continuous, grid-shaped or have a specific shape. The application can use physical vapor deposition, chemical vapor deposition, electroplating, spraying or other techniques to form a thermal conduction material layer on the side of the thermal expansion structure away from the substrate, and then subject the thermal conduction material layer to patterning treatment, thereby obtaining the thermal conduction structure. Of course, when the thermal conduction structures are connected into a thermal conduction layer, the thermal conduction material layer can be obtained without patterning treatment. The function and structure of the thermal conduction structure and the thermal expansion structure can refer to the related description of FIG. 7, which will not be repeated here.

[0112] (2) In a possible implementation, the compensation unit includes a thermal contraction structure and a thermal conduction structure, and the process of forming the compensation layer on the side of the light-emitting layer away from the substrate includes: forming a thermal conduction structure on the side of the light-emitting layer away from the substrate, and forming a thermal contraction structure on the side of the thermal conduction structure away from the substrate. The preparation process of the thermal contraction structure can refer to the preparation process of the thermal expansion structure, and the difference is that the thermal expansion material is replaced by a thermal contraction material, which will not be repeated here.

[0113] In a possible implementation, the heat-conductive structures in the at least one compensation unit are connected into a heat-conductive layer; the compensation layer further comprises: a transparent support layer located on a side of the heat-conductive layer close to other structures; the other structures are structures in the compensation unit other than the heat-conductive structures; the transparent support layer has at least one hollow corresponding to the at least one compensation unit, and the other structures in the compensation unit are located in the corresponding hollow; in the case where the compensation layer comprises the thermal expansion structures, the other structures comprise the thermal expansion structures, and the compensation layer is formed on a side of the light-emitting layer away from the substrate, the transparent support layer is further formed on the side of the light-emitting layer away from the substrate; in this case, the thermal expansion structures are formed on a side of the transparent support layer away from the substrate; in the case where the compensation layer comprises the thermal contraction structures, the other structures comprise the thermal contraction structures, and the compensation layer is formed on a side of the light-emitting layer away from the substrate, the transparent support layer is further formed on a side of the heat-conductive layer away from the substrate; in this case, the thermal contraction structures are formed on a side of the heat-conductive layer close to the transparent support layer.

[0114] A material with excellent optical transparency and mechanical strength is selected as the base material of the transparent support layer. At least one hollow corresponding to the at least one compensation unit is formed on the base material using techniques such as cutting, etching, or laser processing, to obtain the transparent support layer. The size and position of the hollow should be accurately matched with the size and position of the other structures in the compensation unit. The other structures in the compensation unit, such as the thermal expansion structures or the thermal contraction structures, are formed in the hollow formed on the transparent support layer using appropriate processes.

[0115] (3) In a possible implementation, the material of the compensation unit is a shape memory material. The process of forming the compensation layer on a side of the light-emitting layer away from the substrate comprises: forming at least one initial unit corresponding to each of the at least one light-emitting unit on a side of the light-emitting layer away from the substrate; the material of the initial unit is a shape memory material, and the initial unit has a first shape at a first environmental temperature; the initial unit is heated to a second environmental temperature, and the initial unit is changed from the first shape to a second shape, to change the at least one initial unit into the at least one compensation unit corresponding to each of the light-emitting units; the compensation unit is used to: transmit light from the corresponding light-emitting unit in the first shape at the first environmental temperature; and converge light from the corresponding light-emitting unit in the second shape at the second environmental temperature.

[0116] On the side of the light-emitting layer away from the substrate, an initial unit corresponding to each of the at least one light-emitting unit is formed by using a shape memory material through a proper process. The initial unit has a specific size and shape when formed to adapt to subsequent deformation and optical adjustment. Then, the initial unit is heated to a second ambient temperature. The heating temperature and time are accurately controlled according to requirements to ensure that the shape memory material can completely transform into the second shape without causing damage or performance degradation of the material. During the heating process, the initial unit is deformed from the first shape to the second shape. The deformation process can be achieved through external mechanical force control to ensure accurate matching of the compensation unit and the light-emitting unit.

[0117] After the preparation is completed, the compensation layer can be functionally verified. That is, at the first ambient temperature, it is verified whether the compensation unit is in the first shape and allows light from the corresponding light-emitting unit to pass through. At the second ambient temperature, it is verified whether the compensation unit is in the second shape and can effectively converge the light from the corresponding light-emitting unit.

[0118] Optionally, the second shape of the compensation unit with the shape memory function can be determined, and in the process of preparing the compensation unit, it is not necessary to first form an initial unit on the substrate and then heat the initial unit, but the compensation unit with the shape memory function can be directly formed on the substrate.

[0119] In a possible implementation, the compensation layer is formed on the side of the light-emitting layer away from the substrate, including: forming a transparent support layer on the side of the light-emitting layer close to the compensation unit; the transparent support layer has at least one hollow corresponding to at least one compensation unit, and the compensation unit is located in the corresponding hollow. The process of forming the transparent support layer on the side of the light-emitting layer close to the compensation unit can refer to the process of forming the transparent support layer on the side of the heat-conducting layer close to other structures described above, which will not be described here.

[0120] Optionally, the display panel further includes other film layers, such as an encapsulation layer, which is arranged on the outermost layer of the display panel and is used to protect the film layer structure between the encapsulation layer and the substrate. In this case, the encapsulation layer can be formed on the side of the film layers other than the encapsulation layer away from the substrate after the film layers other than the encapsulation layer are formed on the substrate.

[0121] In summary, the display panel prepared by the method provided in the embodiments of the present application compensates for the difference in the change rate of the light-emitting brightness of the regions where different light-emitting units are located at the second ambient temperature compared with the first ambient temperature at the second ambient temperature through the compensation layer arranged on the light-emitting layer, so as to reduce the deviation of the display effect of the display panel on the same picture at the first ambient temperature and the second ambient temperature, thereby improving the display effect of the display panel.

[0122] It should be understood that "a plurality" as referred to herein means two or more than two.

[0123] The above only is the exemplary embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the principle of the present application should be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that, include: A substrate, and a light-emitting layer and a compensation layer arranged sequentially on the substrate in a direction away from the substrate; The light-emitting layer includes multiple light-emitting units for emitting different colors of light; The compensation layer is used for: At the first ambient temperature, light from the various light-emitting units is transmitted; In addition, at the second ambient temperature, the light emission brightness of the area where at least one of the multiple light-emitting units in the display panel is located is adjusted to compensate for the difference in the rate of change of the light emission brightness of the area where the multiple light-emitting units in the display panel are located at the second ambient temperature compared with the first ambient temperature.

2. The display panel according to claim 1, characterized in that, For any of the at least one light-emitting units, the compensation layer is used to: at the second ambient temperature, converge the light from the light-emitting unit to adjust the light output brightness of the area where the light-emitting unit is located in the display panel.

3. The display panel according to claim 2, characterized in that, The compensation layer includes at least one compensation unit that corresponds one-to-one with each of the at least one light-emitting units; The compensation unit is used for: It takes on a first shape at the first ambient temperature so as to transmit light from the corresponding light-emitting unit; In addition, at the second ambient temperature, it takes on a second shape to concentrate light from the corresponding light-emitting unit, the first shape being different from the second shape.

4. The display panel according to claim 3, characterized in that, The compensation unit includes: a thermal expansion structure and a thermally conductive structure arranged at intervals along a direction away from the substrate. The thermal conductivity of the thermally conductive structure is higher than that of the film layer on the side of the thermal expansion structure away from the thermally conductive structure; the thermally conductive structure transmits light from the corresponding light-emitting unit at both the first ambient temperature and the second ambient temperature; The thermal expansion structure expands to a greater extent at the second ambient temperature than it expands at the first ambient temperature.

5. The display panel according to claim 3, characterized in that, The compensation unit includes: a thermally conductive structure and a thermally shrinkable structure arranged sequentially along a direction away from the substrate. The thermal conductivity of the thermally conductive structure is higher than that of the film layer on the side of the heat-shrinkable structure away from the thermally conductive structure; the thermally conductive structure transmits light from the corresponding light-emitting unit at both the first ambient temperature and the second ambient temperature; The heat-shrinkable structure shrinks more at the second ambient temperature than it shrinks at the first ambient temperature.

6. The display panel according to claim 4 or 5, characterized in that, The heat-conducting structures in the at least one compensation unit are connected to form a heat-conducting layer; The compensation layer further includes: a transparent support layer located on the side of the heat-conducting layer closer to other structures; the other structures are structures in the compensation unit other than the heat-conducting structure; the transparent support layer has at least one cutout corresponding to the at least one compensation unit, and the other structures in the compensation unit are located in the corresponding cutout.

7. The display panel according to claim 3, characterized in that, The compensation unit is made of shape memory material.

8. The display panel according to claim 7, characterized in that, The compensation layer further includes: a transparent support layer located on the side of the light-emitting layer near the compensation unit; The transparent support layer has at least one cutout corresponding to each of the at least one compensation unit, and the compensation unit is located within the corresponding cutout.

9. The display panel according to any one of claims 2-8, characterized in that, The at least one light-emitting unit includes a first light-emitting unit, and the plurality of light-emitting units further includes a second light-emitting unit in addition to the at least one light-emitting unit; The rate of change of light output brightness corresponding to the first light-emitting unit is greater than the rate of change of light output brightness corresponding to the second light-emitting unit; For any of the various light-emitting units, the rate of change of the emitted light intensity of the light-emitting unit is C = (BA) / A; where B is the emitted light intensity of the light-emitting unit at the second ambient temperature, and A is the emitted light intensity of the light-emitting unit at the first ambient temperature.

10. The display panel according to claim 1, characterized in that, For any of the at least one light-emitting units, the compensation layer is used to: reduce the transmittance of light from the light-emitting unit at the second ambient temperature, so as to adjust the light output brightness of the area where the light-emitting unit is located in the display panel.

11. The display panel according to claim 10, characterized in that, The at least one light-emitting unit includes a third light-emitting unit, and the plurality of light-emitting units further includes a fourth light-emitting unit in addition to the at least one light-emitting unit; The rate of change of light output brightness corresponding to the third light-emitting unit is less than the rate of change of light output brightness corresponding to the fourth light-emitting unit; For any of the various light-emitting units, the rate of change of the emitted light intensity Z = (YX) / X; where Y is the emitted light intensity of the light-emitting unit at the second ambient temperature, and X is the emitted light intensity of the light-emitting unit at the first ambient temperature.

12. The display panel according to claim 11, characterized in that, The compensation layer is used for: It is transparent at the first ambient temperature so that light from the various light-emitting units can pass through; Furthermore, the fourth light-emitting unit emits light of the target color at the second ambient temperature.

13. A method for manufacturing a display panel, characterized in that, The method includes: Provide substrates; A light-emitting layer is formed on the substrate, the light-emitting layer comprising multiple light-emitting units for emitting different colors of light; A compensation layer is formed on the side of the light-emitting layer away from the substrate, the compensation layer being used for: At the first ambient temperature, light from the various light-emitting units is transmitted; In addition, at the second ambient temperature, the light emission brightness of the area where at least one of the multiple light-emitting units in the display panel is located is adjusted to compensate for the difference in the rate of change of the light emission brightness of the area where the multiple light-emitting units in the display panel are located at the second ambient temperature compared with the first ambient temperature.

14. The method according to claim 13, characterized in that, A compensation layer is formed on the side of the light-emitting layer away from the substrate, comprising: On the side of the light-emitting layer away from the substrate, at least one initial unit is formed that corresponds one-to-one with each of the at least one light-emitting units; wherein the material of the initial unit is a shape memory material, and the initial unit has a first shape at a first ambient temperature; The initial unit is heated to a second ambient temperature, and the initial unit is changed from the first shape to the second shape, so as to change the at least one initial unit into at least one compensation unit corresponding to each of the light-emitting units; The compensation unit is configured to: take on the first shape at the first ambient temperature to transmit light from the corresponding light-emitting unit; and take on the second shape at the second ambient temperature to converge light from the corresponding light-emitting unit.

Images