Display module and display device

Abstract

The invention provides a display module and a display device. The display module comprises a substrate and a light-emitting functional layer, the light-emitting functional layer is located on one side of the substrate, the light-emitting functional layer comprises a thermal conversion part and at least one light-emitting element, the thermal conversion part is connected with the at least one light-emitting element, and the thermal conversion part is made of a thermoluminescent material doped with a color-changing substance. The thermoluminescent material is arranged around the light-emitting element, so that heat generated by the light-emitting element excites the thermoluminescent material to emit light through the thermal conversion part, the light-emitting efficiency of the light-emitting element is improved, and the problem that the light-emitting efficiency is influenced by temperature rise caused by heating of the light-emitting element in the prior art is solved.

Description

Technical Field

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

[0002] Currently, Micro LED technology has the advantages of excellent contrast, low energy consumption, high color saturation and fast response speed. However, during the operation of LED, only 20% to 30% of the energy is converted into light energy, and the remaining 70% to 80% is converted into heat energy. For Micro LED, the heat generated by a single LED increases, and the thermal coupling effect between adjacent LEDs will also increase. The heat generated will not only reduce the luminous efficiency of the LED, but also affect the light output rate of the LED, thereby affecting the stability and service life of the LED.

[0003] Therefore, a method is urgently needed to solve the problem in the prior art that the light emitting element generates heat, causing the temperature to rise and affecting the light output efficiency. Summary of the invention

[0004] The main purpose of the present invention is to provide a display module and a display device to solve the problem in the prior art that the light emitting element generates heat, causing the temperature to rise and affecting the light output efficiency.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a display module is provided, comprising: a base substrate; a light-emitting functional layer, located on one side of the base substrate, the light-emitting functional layer comprising a thermal conversion part and at least one light-emitting element, wherein the thermal conversion part is connected to at least one of the light-emitting elements, and the material of the thermal conversion part comprises a thermoluminescent material doped with a color-changing substance.

[0006] In order to achieve the above objective, according to one aspect of the present invention, a display device is provided, comprising: any one of the above display modules.

[0007] The technical solution of the present invention is applied to provide a display module, which includes a substrate and a light-emitting functional layer, the light-emitting functional layer is located on one side of the substrate, the light-emitting functional layer includes a heat conversion part and at least one light-emitting element, the heat conversion part is connected to the at least one light-emitting element, and the material of the heat conversion part includes a thermoluminescent material doped with a color-changing substance. The heat conversion part is connected to the light-emitting element, and the thermoluminescent material is arranged around the light-emitting element, so that the heat generated by the light-emitting element excites the thermoluminescent material to emit light through the heat conversion part, thereby increasing the light extraction efficiency of the light-emitting element, and solving the problem in the prior art that the light-emitting element generates heat, resulting in an increase in temperature and affecting the light extraction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0009] Figure 1 A cross-sectional view of a display module provided according to an embodiment of the present invention is shown;

[0010] Figure 2 A top view of a display module provided according to an embodiment of the present invention is shown;

[0011] Figure 3 A top view of another display module provided according to an embodiment of the present invention is shown;

[0012] Figure 4 A cross-sectional view of another display module provided according to an embodiment of the present invention is shown;

[0013] Figure 5 A top view of another display module provided according to an embodiment of the present invention is shown;

[0014] Figure 6 A top view of another display module provided according to an embodiment of the present invention is shown;

[0015] Figure 7 A top view of another display module provided according to an embodiment of the present invention is shown;

[0016] Figure 8 A top view of another display module provided according to an embodiment of the present invention is shown;

[0017] Fig. 9 A top view of another display module provided according to an embodiment of the present invention is shown;

[0018] Fig.10 A top view of another display module provided according to an embodiment of the present invention is shown;

[0019] Fig.11 A cross-sectional view of another display module provided according to an embodiment of the present invention is shown;

[0020] Fig.12 A cross-sectional view of a display device provided according to an embodiment of the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 100, base substrate; 101, splicing display area; 200, light-emitting functional layer; 201, heat conversion part; 202, light-emitting element; 203, heat conduction part; 204, adjacent light-emitting element; 300, blocking layer; 400, display module. DETAILED DESCRIPTION

[0023] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element, or there may be intermediate elements. Moreover, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element, or "connected" to the other element through a third element.

[0026] It should be clear that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] During the operation of LED, a small part of the energy is converted into light energy, and most of the rest of the energy is converted into heat energy. For Micro LED, the heat generated by a single LED increases, and the thermal coupling effect between adjacent LEDs will also increase. The generated heat will not only reduce the luminous efficiency of the LED, but also affect the light output rate of the LED, thereby affecting the stability and service life of the LED.

[0029] To solve the above problems, the embodiment of the present application provides a display module, such as Figure 1 As shown, it includes a base substrate 100 and a light-emitting functional layer 200, and the light-emitting functional layer 200 is located on one side of the base substrate 100, wherein:

[0030] The light-emitting functional layer 200 includes a heat conversion part 201 and at least one light-emitting element 202. The light-emitting element 202 is used to convert electrical energy into light energy and then realize light emission. The light-emitting element 202 can be a sub-pixel. The heat conversion part 201 is used to convert the heat energy generated during the light-emitting process of the light-emitting element 202 into light energy. The present application does not impose any specific restrictions on the arrangement of the light-emitting element 202 and the heat conversion part 201. They can be arranged in a direction perpendicular to the base substrate 100 or in other directions. The heat conversion part 201 is connected to at least one light-emitting element 202, that is, the heat conversion part 201 in the light-emitting functional layer 200 can be connected to one light-emitting element 202, or the heat conversion part 201 can be connected to multiple light-emitting elements 202. The present application does not limit the specific position of the heat conversion part 201. The heat conversion part 201 can completely surround the light-emitting element 202, or the heat conversion part 201 can partially surround the light-emitting element 202. The material of the heat conversion part 201 includes a thermoluminescent material doped with a color-changing substance. A thermoluminescent material is a material that emits light when heated. This phenomenon is also called thermoluminescence, which is caused by the electrons in the material being released from crystal defects or impurities when heated or exposed to radiation, and then recombining with vacancies in the crystal lattice to generate light. Since the thermoluminescent material is doped with a color-changing substance, its luminescent color can be set according to actual needs.

[0031] Specifically, the substrate substrate can be an organic light-emitting diode (OLED) or other types of substrate substrates. And the substrate substrate can be a flexible substrate substrate or a rigid substrate substrate. The thermoluminescent material can be a crystalline material or a ceramic material. Different types of materials have different sensitivity, stability and response time. Among them, the crystalline material can be lithium fluoride, calcium sulfate, etc., and the ceramic material can be a mixture of different oxides. The color-changing substance can be rare earth ions, transition metal ions, organic materials, and quantum dot materials, etc. Among them, the rare earth ions can be europium, neodymium, cerium, etc., which can be doped in thermoluminescent materials of oxides, silicates or phosphates, and transition metal ions such as titanium, vanadium, chromium, manganese, etc. can also be doped in thermoluminescent materials such as oxides, phosphates or borates. Organic materials can use organic dyes or fluorescent molecules, such as rhodamine, fluorescein, etc. Quantum dot materials are nano-scale particles made of semiconductor materials, such as cadmium selenide and cadmium sulfide.

[0032] Taking the connection between the heat conversion part 201 in the light-emitting functional layer 200 and a light-emitting element 202 as an example, the top view of the light-emitting functional layer is as follows: Figure 2 Taking the connection between the heat conversion part 201 in the light-emitting functional layer 200 and two light-emitting elements 202 as an example, the top view of the light-emitting functional layer is as shown in FIG. Figure 3 As shown. Since the heat accumulation of mini-LED and Micro-LED has a greater impact on the light output rate, the method is more effective in the field of mini-LED and Micro-LED.

[0033] In the embodiment, the display module includes a base substrate and a light-emitting functional layer, the light-emitting functional layer is located on one side of the base substrate, the light-emitting functional layer includes a heat conversion part and at least one light-emitting element, the heat conversion part is connected to the at least one light-emitting element, and the material of the heat conversion part includes a thermoluminescent material doped with a color-changing substance. The heat conversion part is connected to the light-emitting element, and the thermoluminescent material is arranged around the light-emitting element, so that the heat generated by the light-emitting element excites the thermoluminescent material to emit light through the heat conversion part, thereby increasing the light extraction efficiency of the light-emitting element, and solving the problem in the prior art that the light-emitting element generates heat, resulting in an increase in temperature and affecting the light extraction efficiency.

[0034] Since in practical applications, heat loss or heat transfer may occur during heat transfer between the light emitting element and the heat conversion unit, in order to further increase the heat conversion efficiency, in some optional embodiments, such as Figure 4 As shown, the heat conversion part 201 and the light emitting element 202 are arranged at intervals on the same side of the base substrate 100, that is, the heat conversion part 201 and the light emitting element 202 are located on the same side of the base substrate 100 to form the light emitting functional layer 200, and there is a certain distance between the heat conversion part 201 and the light emitting element 202. The heat conversion part 201 is connected to at least one light emitting element 202 through a heat conducting part 203, and the heat conducting part 203 is used to conduct the heat generated by the light emitting element 202 during the light emitting process to the heat conversion part 201. The heat conducting part 203 is located on the surface of the light emitting element 202 away from the base substrate 100, the surface of the base substrate 100 close to the light emitting functional layer 200, and the side wall of the light emitting element 202. That is, the heat conducting part 203 includes three parts, namely, a first part on the surface of the light emitting element 202 away from the base substrate 100, a second part between the base substrate 100 and the light emitting functional layer 200, and a third part on the side wall of the light emitting element 202. Through the specific arrangement of the heat conducting part 203 of multiple parts, it is possible to reduce the heat loss or heat transfer during the heat transmission between the light-emitting element 202 and the heat conversion part 201, thereby improving the heat conversion efficiency. In addition, a specific heat conducting line can be laid through the heat conducting part 203 to conduct the heat of the light-emitting element 202 to a specific position of the heat conversion part 201, thereby stimulating the thermoluminescent material to emit light, thereby further enhancing the light utilization rate.

[0035] Specifically, the thermal conductive material can be metal material, ceramic material, carbon material, polymer composite material, thermal interface material, phase change material, aerogel, thermal conductive rubber and thermal conductive plastic, etc., wherein metal material can be copper, aluminum, silver, etc., ceramic thermal conductive material can be aluminum oxide, aluminum nitride, silicon carbide, etc., carbon material such as graphite, carbon nanotubes and graphene, etc., polymer composite material is a composite material with good thermal conductivity formed by dispersing metal material, ceramic material and carbon material in a polymer matrix, thermal interface material can be thermal conductive silicone grease, thermal conductive tape and thermal conductive gasket, etc., phase change material includes paraffin, salt, metal hydride, etc., aerogel includes silicon aerogel, carbon aerogel, etc.; thermal conductive rubber is composed of rubber matrix and thermal conductive filler, thermal conductive plastic is a material with certain thermal conductive properties made by adding thermal conductive filler (such as metal, ceramic, carbon material, etc.) to plastic matrix. Further, the thermal conductive part can be made of transparent material.

[0036] In some optional embodiments, Figure 2 As shown, the light emitted by the heat conversion part 201 has the same color as the light emitted by the light emitting element 202. Since the material of the heat conversion part 201 includes a thermoluminescent material doped with a color-changing substance, the color of the light emitted by the heat conversion part 201 can be designed according to actual needs. When the light emitting colors of the heat conversion part and the light emitting element are the same, the light extraction efficiency of the original light emitting element can be increased, and at the same time, when the brightness is the same, the current of the light emitting element can be reduced, further improving the service life of the light emitting element.

[0037] Specifically, the light emitting element may emit red, green, blue or other colors. Therefore, the heat conversion part may emit light of the same color as red, green, blue or other colors by doping color-changing substances of corresponding colors.

[0038] In some optional embodiments, such as Figure 5 As shown, the light emitted by the heat conversion part 201 is the same color as the light emitted by the light emitting element 202. The light emitted by the light emitting elements 202 in the same column is the same color, and the light emitted by the light emitting elements 202 in different columns is different in color. The color design of the light emission is not limited to one of red, green or blue, and multiple colors of light can be emitted, or a mixture of colors can be achieved through multiple colors of light, thereby further increasing the diversity of the light emission of the light emitting functional layer.

[0039] In another embodiment, Figure 6As shown, the heat conversion part 201 is connected to at least one light emitting element 202 via a heat conducting part 203, and the heat conducting part 203 is used to conduct the heat generated by the light emitting element 202 during the light emitting process to the heat conversion part 201, and the light emitted by the heat conversion part 201 has the same color as the light emitted by the light emitting element 202. While further increasing the light extraction efficiency of the original light emitting element, the light utilization rate is further enhanced.

[0040] In some optional embodiments, Figure 7 As shown, the light emitted by the heat conversion part 201 has the same color as the light emitted by the adjacent light emitting element 204, wherein the distance between the adjacent light emitting element 204 and the heat conversion part 201 is less than the distance threshold. When the light emission colors of the heat conversion part and the adjacent light emitting element are the same, the light extraction efficiency of the adjacent light emitting element can be increased, and when the adjacent light emitting element fails and does not emit light, it can also serve as a backup light emitting element, further increasing the light emission efficiency of the display module.

[0041] In practical applications, when the distance between adjacent light-emitting elements and the heat conversion unit is less than a distance threshold, the heat conversion unit can convert heat to emit light, which can replace the light emitted by the adjacent light-emitting elements. The distance threshold can be a distance at which the replacement light emission cannot be visually distinguished.

[0042] In order to further increase the diversity of luminescence of the luminescent functional layer, such as Figure 7 As shown, the heat conversion part 201 is connected to at least one light emitting element 202 through the heat conduction part 203. The light emitted by the heat conversion part 201 is different in color from the light emitted by the light emitting element 202. The heat conduction part 203 is used to conduct the heat generated by the light emitting element 202 during the light emitting process to the heat conversion part 201. Since the heat conversion part and the light emitting element emit different colors, the color design of the light is not limited to one of red, green or blue, and multiple colors of light can be emitted, or a mixture of colors can be achieved through multiple colors of light, thereby further increasing the diversity of light emission of the light emitting functional layer.

[0043] like Figure 8 As shown, the heat conversion part 201 is connected to the plurality of light emitting elements 202 through the heat conducting part 203, and at least two of the plurality of light emitting elements 202 emit light of different colors. The structure can further realize multi-point setting by emitting light of the plurality of light emitting elements in different colors, thereby further improving the uniformity of the backlight of the display module.

[0044] In practical applications, the heat conducting part can be the same color as one of the lights emitted by the multiple light emitting elements, and can provide alternative light emission when one of the light emitting elements fails. The heat conducting part can be different in color from the lights emitted by the multiple light emitting elements, and some of the multiple light emitting elements can have the same light emission color.

[0045] like Fig. 9 As shown, a plurality of heat conversion parts 201 and a plurality of light emitting elements 202 are alternately arranged in a predetermined direction, wherein the predetermined direction is perpendicular to the thickness direction of the light emitting functional layer 200, and any two heat conversion parts 201 are connected by a heat conducting part 203, and the heat conducting part 203 can be formed as follows Fig. 9 The mesh structure shown can also form other irregular structures. The alternating arrangement of the heat conversion parts and the light emitting elements can further improve the display uniformity of the display module.

[0046] Specifically, due to the limitations of the material and manufacturing process of the thermal conversion part, it is difficult for the luminous intensity of the light-emitting element and the luminous intensity of the thermal conversion part to be exactly the same. Therefore, the alternating arrangement between the thermal conversion part and the light-emitting element can weaken the difference in luminous intensity between two adjacent thermal conversion parts and light-emitting elements, thereby further improving display uniformity.

[0047] Since the light-emitting functional layer in the prior art does not include a heat conversion unit, Fig. 9 The position of the heat conversion part corresponds to the light-emitting element to achieve the same light-emitting effect. When the light-emitting effect is the same, the distance between two adjacent light-emitting elements in the prior art is significantly smaller than the two adjacent light-emitting elements in the present application. Therefore, on the basis of reducing the distance between the two adjacent light-emitting elements, the setting can further improve the heat dissipation effect and service life of the light-emitting element, and can also increase the anti-static circuit of the light-emitting element to enhance the anti-static ability of the display module.

[0048] In order to further improve the uniformity of the light emission of the light-emitting functional layer, the distance between the heat conversion part and each light-emitting element is equal. Since the distance between the heat conversion part and each light-emitting element is equal, the heat received by the heat conversion part from the corresponding light-emitting element is the same. When the size and material of the heat conversion part are the same, the light emission intensity of the heat conversion part after thermoelectric conversion is also the same. Therefore, the setting can further improve the uniformity of the light emission of the light-emitting functional layer.

[0049] Specifically, the distance may be equal in any direction perpendicular to the thickness direction of the light-emitting functional layer, or may be equal in one direction perpendicular to the thickness direction of the light-emitting functional layer.

[0050] In order to further improve the display brightness of the spliced ​​display area, such as Fig.10 As shown, the base substrate includes a spliced ​​display area 101 , and the heat conversion portion 201 has a projection on the spliced ​​display area 101 .

[0051] In actual applications, the spliced ​​screen is composed of multiple independent display units, and there are borders between each unit. These borders may block part of the light, or different display units have slight differences in color, brightness and pixel structure, resulting in relatively low brightness in the spliced ​​area. In addition, even if the units of the spliced ​​screen are physically aligned, there may be gaps optically because light will not pass through the physical barrier of the screen border. This optical gap will form a darker area in the spliced ​​area. By providing a heat conversion unit at the spliced ​​display, the heat of the light-emitting unit connected to it is thermally converted into light, which can further improve the display brightness of the spliced ​​display area.

[0052] The light-emitting functional layer also includes a sensing element, which is used to detect the luminous flux of the light-emitting element and the heat conversion unit. By setting the sensing element, the luminous flux of the light-emitting functional layer can be further adaptively adjusted according to the sensing result obtained by the sensing element.

[0053] Specifically, the light sensing element can be integrated in different positions of the display panel, such as the display area, non-display area or specific sub-pixels, to achieve the best sensing effect and display performance. The sensing element can also sense the light flux of the external environment of the display module and adaptively adjust the light flux according to the sensing result. The types of light sensing elements include but are not limited to the following: ambient light sensor, RGB sensor, thin film transistor light sensing component, photodiode or photoresistor. The ambient light sensor can sense the surrounding light conditions and inform the processing chip to automatically adjust the display backlight brightness to reduce the power consumption of the product. The RGB sensor can detect the RGB components and color temperature of the surrounding light, and is suitable for devices equipped with display screens such as smartphones and tablets. The thin film transistor light sensing component can detect the brightness of the ambient light source. The photodiode or photoresistor can convert the optical signal into an electrical signal. In practical applications, for mini LED, a sensing element can be set in the black matrix layer, or a transparent sensing element can be made on the filter or cover glass, and the sensing result can be fed back to the integrated circuit to adjust the current of the light-emitting element through the light flux to achieve dynamic balance. For Micro LED, a sensing element can be set on the cover glass, and the sensing result can be fed back to the integrated circuit. The current of the light-emitting element can be adjusted according to the luminous flux to achieve dynamic balance.

[0054] like Fig.11 As shown, the display module further includes a barrier layer 300, which is located between the base substrate 100 and the light-emitting functional layer 200, and the barrier layer 300 is used to block the heat emitted by the light-emitting functional layer 200 from entering the base substrate 100. By providing the barrier layer, the heat of the light-emitting functional layer can be blocked from entering the base substrate, the temperature of the base substrate can be reduced, and the display effect of the display module can be further improved and the service life of the display module can be extended.

[0055] Specifically, the barrier layer can be made of vacuum materials, porous materials, heat-reflective materials, diamond films, and transparent polycarbonate plates, among which vacuum materials use the internal vacuum of the material to block convection for heat insulation, and can be composed of core materials, barrier films, and getters, which can effectively avoid heat transfer caused by air convection and greatly reduce the thermal conductivity; porous materials use the pores contained in the material itself to insulate heat, and the thermal conductivity of air or inert gas in the gap is very low, such as foam materials, fiber materials, and aerogel felt; heat-reflective materials have a high reflectivity and can reflect heat, such as gold, silver, nickel, aluminum foil, or metal-plated polyester, polyimide film, etc. In practical applications, in order to further enhance the heat blocking effect, the barrier layer can completely cover the surface between the substrate and the light-emitting functional layer.

[0056] According to the embodiments of the present application, Fig.12 As shown, a display device is also provided, including: any one of the display modules 400 .

[0057] From the above description, it can be seen that the embodiments of the present invention achieve the following technical effects:

[0058] 1) The display module of the present application includes a substrate and a light-emitting functional layer. The light-emitting functional layer is located on one side of the substrate. The light-emitting functional layer includes a heat conversion part and at least one light-emitting element. The heat conversion part is connected to the at least one light-emitting element. The material of the heat conversion part includes a thermoluminescent material doped with a color-changing substance. The heat conversion part is connected to the light-emitting element, and the thermoluminescent material is arranged around the light-emitting element, so that the heat generated by the light-emitting element excites the thermoluminescent material to emit light through the heat conversion part, thereby increasing the light extraction efficiency of the light-emitting element, and solving the problem in the prior art that the light-emitting element generates heat, causing the temperature to rise and affect the light extraction efficiency.

[0059] 2) The display device of the present application includes a display module, the display module includes a substrate and a light-emitting functional layer, the light-emitting functional layer is located on one side of the substrate, the light-emitting functional layer includes a heat conversion part and at least one light-emitting element, the heat conversion part is connected to at least one light-emitting element, and the material of the heat conversion part includes a thermoluminescent material doped with a color-changing substance. The heat conversion part is connected to the light-emitting element, and the thermoluminescent material is arranged around the light-emitting element, so that the heat generated by the light-emitting element excites the thermoluminescent material to emit light through the heat conversion part, thereby increasing the light extraction efficiency of the light-emitting element, and solving the problem in the prior art that the light-emitting element generates heat, causing the temperature to rise and affect the light extraction efficiency.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A display module, It is characterized in that include: substrate substrate; The light-emitting functional layer is located on one side of the base substrate, and the light-emitting functional layer includes a heat conversion part and at least one light-emitting element, wherein the heat conversion part is connected to at least one of the light-emitting elements, and the material of the heat conversion part includes a thermoluminescent material doped with a color-changing substance.

2. The display module according to claim 1, It is characterized in that The heat conversion portion and the light-emitting element are spaced apart on the same side of the base substrate, and the heat conversion portion is connected to at least one of the light-emitting elements via a heat-conducting portion, and the heat-conducting portion is located on the surface of the light-emitting element away from the base substrate, on the surface of the base substrate close to the light-emitting functional layer, and on the side wall of the light-emitting element.

3. The display module according to claim 1, It is characterized in that The heat conversion portion emits light having the same color as the light emitted by the light emitting element.

4. The display module according to claim 1, It is characterized in that The light emitted by the heat conversion portion has the same color as the light emitted by an adjacent light emitting element, wherein the distance between the adjacent light emitting element and the heat conversion portion is less than a distance threshold.

5. The display module according to claim 1, It is characterized in that The heat conversion part is connected to at least one of the light emitting elements via a heat conduction part, and the light emitted by the heat conversion part has a different color from the light emitted by the light emitting element.

6. The display module according to claim 1, It is characterized in that The heat conversion part is connected to the plurality of light emitting elements via a heat conduction part, and at least two of the plurality of light emitting elements emit light of different colors.

7. The display module according to claim 1, It is characterized in that The plurality of heat conversion parts and the plurality of light emitting elements are alternately arranged in a predetermined direction, wherein the predetermined direction is perpendicular to the thickness direction of the light emitting functional layer.

8. The display module according to any one of claims 1 to 7, It is characterized in that The distance between the heat conversion part and each of the light emitting elements is equal.

9. The display module according to claim 1, It is characterized in that The base substrate includes a splicing display area, and the heat conversion part has a projection on the splicing display area.

10. The display module according to claim 1, It is characterized in that The light emitting functional layer further includes a sensing element for detecting light fluxes of the light emitting element and the heat conversion portion.

11. The display module according to claim 1, It is characterized in that The display module further includes a barrier layer located between the base substrate and the light-emitting functional layer, and the barrier layer is used to prevent heat emitted by the light-emitting functional layer from entering the base substrate.

12. A display device, It is characterized in that include: A display module as claimed in any one of claims 1 to 11.

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