Display panel and display device

Abstract

The invention discloses a display panel, which belongs to the technical field of display and comprises a substrate, a plurality of light-emitting units, a plurality of thermoelectric conversion units and an energy storage unit. In the light emitting process of the light emitting unit, a large amount of heat can be generated. The thermoelectric conversion unit can convert heat generated when the light-emitting unit emits light into electric energy, and the thermoelectric conversion unit can charge the energy storage unit after converting the heat into the electric energy, so that the energy storage unit can store the electric energy output by the thermoelectric conversion unit. The heat generated in the light-emitting process of the light-emitting unit can be converted into electric energy by the thermoelectric conversion unit, so that the probability that the heat of the light-emitting unit is converged at the position of the light-emitting unit can be effectively reduced through the thermoelectric conversion unit, and the working temperature of the light-emitting unit can be further effectively reduced; therefore, the service life of the light-emitting unit in the display panel is longer, and the reliability of the display panel can be effectively improved.

Description

Technical Field

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

[0002] Micro LED is a new generation of display technology with self-luminous display characteristics. Compared with the existing organic light emitting diode (OLED) display technology and liquid crystal display (LCD), Micro LED has the advantages of higher brightness, higher luminous efficiency and lower power consumption.

[0003] However, when the current display panel integrated with Micro LED is working, the Micro LED in the display panel will generate a large amount of heat, resulting in a high operating temperature of the display panel. When the operating temperature of the display panel is too high, it will seriously affect the service life of the Micro LED in the display panel, resulting in low reliability of the display panel. Summary of the invention

[0004] The embodiment of the present application provides a display panel, which can solve the problem of low reliability of display panels in the prior art. The technical solution is as follows:

[0005] In one aspect, the present application provides a display panel, the display panel having a display area and a non-display area located outside the display area, the display panel comprising:

[0006] substrate;

[0007] A plurality of light-emitting units and a plurality of thermoelectric conversion units located on one side of the substrate and distributed in the display area;

[0008] and, an energy storage unit located at one side of the substrate and distributed in the non-display area, the energy storage unit being electrically connected to the thermoelectric conversion unit;

[0009] The thermoelectric conversion unit is used to convert the heat generated by the light-emitting unit when emitting light into electrical energy, and then charge the energy storage unit.

[0010] Optionally, the multiple light-emitting units correspond one-to-one to the multiple thermoelectric conversion units, the orthographic projections of the light-emitting units on the substrate overlap with the orthographic projections of the corresponding thermoelectric conversion units on the substrate, and the thermoelectric conversion units are closer to the substrate than the light-emitting units.

[0011] Optionally, the display panel further comprises: a plurality of insulating functional layers located on one side of the substrate, the plurality of light-emitting units are all located on a side of the plurality of insulating functional layers away from the substrate, the display panel has a first through hole and a second through hole penetrating at least a portion of the insulating functional layers, and the orthographic projections of the first through hole and the second through hole on the substrate overlap with the orthographic projection of the same light-emitting unit on the substrate;

[0012] Wherein, the thermoelectric conversion unit includes: a first thermoelectric arm located in the first through hole and a second thermoelectric arm located in the second through hole.

[0013] Optionally, the first thermoelectric arm is one of a P-type thermoelectric arm and an N-type thermoelectric arm, and the second thermoelectric arm is the other of the P-type thermoelectric arm and the N-type thermoelectric arm.

[0014] Optionally, the display panel further includes: a plurality of first connecting electrodes and a plurality of second connecting electrodes;

[0015] The plurality of first connecting electrodes correspond to the plurality of thermoelectric conversion units one by one, the first connecting electrodes are located on a side of the corresponding thermoelectric conversion unit away from the substrate, and two ends of the first connecting electrodes are respectively overlapped with the first thermoelectric arm and the second thermoelectric arm in the corresponding thermoelectric conversion unit;

[0016] The multiple second connecting electrodes are all located on the side of the multiple thermoelectric conversion units facing the substrate, one second connecting electrode is distributed between two adjacent thermoelectric conversion units, and for two adjacent thermoelectric conversion units, the first thermoelectric arm in one thermoelectric conversion unit and the second thermoelectric arm in the other thermoelectric conversion unit are respectively overlapped with the two ends of the same second connecting electrode.

[0017] Optionally, the display panel further comprises: two pin transfer electrodes electrically connected to the light emitting unit;

[0018] The pin transfer electrode and the first connection electrode are arranged in different layers, and the first connection electrode is closer to the substrate than the pin transfer electrode;

[0019] Alternatively, the pin transfer electrode and the first connecting electrode are arranged in the same layer, and the first connecting electrode corresponding to the thermoelectric conversion unit is located between the two pin transfer electrodes electrically connected to the corresponding light-emitting unit.

[0020] Optionally, both the first thermoelectric arm and the second thermoelectric arm are P-type thermoelectric arms, or both the first thermoelectric arm and the second thermoelectric arm are N-type thermoelectric arms.

[0021] Optionally, the display panel further has a third through hole and a fourth through hole penetrating at least a portion of the insulating functional layer, the third through hole is distributed between the first through hole and the second through hole, and the fourth through hole is arranged on a side of the second through hole away from the first through hole;

[0022] The thermoelectric conversion unit further includes: a first conductive arm located in the third through hole and a second conductive arm located in the fourth through hole;

[0023] The display panel further includes: a plurality of third connection electrodes, a plurality of fourth connection electrodes, a plurality of fifth connection electrodes and a plurality of sixth connection electrodes;

[0024] The plurality of third connecting electrodes and the plurality of fourth connecting electrodes are respectively corresponding to the plurality of thermoelectric conversion units, the third connecting electrodes and the fourth connecting electrodes are respectively located on a side of the corresponding thermoelectric conversion unit away from the substrate, and two ends of the third connecting electrode are respectively overlapped with the first thermoelectric arm and the first conductive arm in the corresponding thermoelectric conversion unit, and two ends of the fourth connecting electrode are respectively overlapped with the second conductive arm and the second thermoelectric arm in the corresponding thermoelectric conversion unit;

[0025] The plurality of fifth connecting electrodes correspond to the plurality of thermoelectric conversion units one by one, the fifth connecting electrodes are located on a side of the corresponding thermoelectric conversion unit facing the substrate, and two ends of the fifth connecting electrodes are respectively overlapped with the first conductive arm and the second thermoelectric arm in the corresponding thermoelectric conversion unit;

[0026] The multiple sixth connecting electrodes are all located on the side of the multiple thermoelectric conversion units facing the substrate, one sixth connecting electrode is distributed between two adjacent thermoelectric conversion units, and in two adjacent thermoelectric conversion units, the first thermoelectric arm in one thermoelectric conversion unit and the second thermoelectric arm in the other thermoelectric conversion unit are respectively overlapped with the two ends of the same sixth connecting electrode.

[0027] Optionally, the display panel further comprises: a heat conduction layer attached to the inner wall of the first through hole and the inner wall of the second through hole;

[0028] The first thermoelectric arm is disposed in contact with the heat conducting layer in the first through hole, and the second thermoelectric arm is disposed in contact with the heat conducting layer in the second through hole.

[0029] Optionally, the light-emitting unit and the thermoelectric conversion unit are arranged in the same layer, and the orthographic projection of the light-emitting unit on the substrate does not overlap with the orthographic projection of the thermoelectric conversion unit on the substrate, and one thermoelectric conversion unit is distributed between two adjacent light-emitting units.

[0030] Optionally, the thermoelectric conversion unit comprises: a first thermoelectric layer and a second thermoelectric layer arranged in the same layer;

[0031] The first thermoelectric layer is one of a P-type thermoelectric layer and an N-type thermoelectric layer, and the second thermoelectric layer is the other of the P-type thermoelectric layer and the N-type thermoelectric layer.

[0032] Optionally, the display panel further includes: a plurality of seventh connection electrodes and a plurality of eighth connection electrodes, wherein the seventh connection electrodes and the eighth connection electrodes are both disposed on the same layer as the first thermoelectric layer and the second thermoelectric layer;

[0033] The plurality of seventh connection electrodes correspond to the plurality of thermoelectric conversion units one by one, and the seventh connection electrodes are located between the first thermoelectric layer and the second thermoelectric layer in the corresponding thermoelectric conversion unit, and overlap the first thermoelectric layer and the second thermoelectric layer respectively;

[0034] For the two thermoelectric conversion units distributed on both sides of the same light-emitting unit, the side of the first thermoelectric layer in one thermoelectric conversion unit facing away from the second thermoelectric layer and the side of the second thermoelectric layer in the other thermoelectric conversion unit facing away from the first thermoelectric layer are respectively overlapped with the two ends of the same eighth connecting electrode.

[0035] Optionally, the eighth connecting electrode includes: a ring-shaped sub-electrode, and a first sub-electrode and a second sub-electrode electrically connected to two sides of the ring-shaped sub-electrode respectively, the first sub-electrode overlaps the side of the first thermoelectric layer in one of the thermoelectric conversion units facing away from the second thermoelectric layer, the second sub-electrode overlaps the side of the first thermoelectric layer in another of the thermoelectric conversion units facing away from the second thermoelectric layer, and the orthographic projection of the light-emitting unit on the substrate is located within the area enclosed by the orthographic projection of the ring-shaped sub-electrode on the substrate.

[0036] Optionally, a distance between a side of the annular sub-electrode facing away from the substrate and the substrate is greater than or equal to a distance between a side of the light-emitting unit facing away from the substrate and the substrate.

[0037] On the other hand, the present application further provides a display device, including: a driving module, and a display panel electrically connected to the driving module, wherein the display panel is the above-mentioned display panel.

[0038] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0039] By setting up multiple thermoelectric conversion units, the heat generated by the multiple light-emitting units when emitting light is converted into electrical energy, thereby reducing the possibility of heat accumulation at the light-emitting units and burning the chips or electrodes; by electrically connecting the thermoelectric conversion unit and the energy storage unit, the waste heat that was originally dissipated directly through the heat-conducting material is reused through the thermoelectric conversion unit and stored in the energy storage unit, thereby improving the energy utilization rate of the display panel, and the energy stored in the energy storage unit can also be reused by the display panel, thereby reducing the power consumption of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 is a top view of a display panel provided in an embodiment of the present application;

[0042] Figure 2 yes Figure 1 The schematic diagram of the film layer structure of the display panel at AA' is shown;

[0043] Figure 3 This is a temperature schematic diagram of a light emitting unit provided in an embodiment of the present application when a thermoelectric conversion unit is not provided;

[0044] Figure 4 This is a temperature schematic diagram of a light emitting unit when a thermoelectric conversion unit is provided in an embodiment of the present application;

[0045] Figure 5 is a top view of the arrangement of a light-emitting unit and a thermoelectric conversion unit in a display panel provided by an embodiment of the present application;

[0046] Figure 6 yes Figure 5 A schematic diagram of the film layer structure of the display panel at BB' is shown;

[0047] Figure 7 yes Figure 5 Another schematic diagram of the film layer structure of the display panel at BB' is shown;

[0048] Figure 8 yes Figure 5 A schematic diagram of another film layer structure of a display panel at BB' is shown;

[0049] Fig. 9 yes Figure 5 A schematic diagram of another film layer structure of a display panel at BB' is shown;

[0050] Fig.10 is a top view of the arrangement of light-emitting units and thermoelectric conversion units in another display panel provided by an embodiment of the present application;

[0051] Fig.11 yes Fig.10 The schematic diagram of the film layer structure of the display panel at CC' is shown;

[0052] Fig.12 yes Fig.10 Another schematic diagram of the film structure of the display panel at CC' is shown;

[0053] Fig.13 It is a schematic diagram of a film layer structure of a display panel provided in another embodiment of the present application. DETAILED DESCRIPTION

[0054] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0055] Please refer to Figure 1 and Figure 2 , Figure 1 is a top view of a display panel provided in an embodiment of the present application, Figure 2 yes Figure 1 The display panel 000 may include: a substrate 100, a plurality of light-emitting units 200, a plurality of thermoelectric conversion units 300 and an energy storage unit 400. The display panel 000 may have a display area 001 and a non-display area 002 located outside the display area.

[0056] The plurality of light emitting units 200 and the plurality of thermoelectric conversion units 300 in the display panel 000 may be located on one side of the substrate 100 and may be distributed in the display area 001. Here, the display panel 000 may display corresponding pictures through the light emission of each light emitting unit 200.

[0057] The energy storage unit 400 in the display panel 000 may be located on one side of the substrate 100 and may be distributed in the non-display area 002. The energy storage unit 400 may be electrically connected to the thermoelectric conversion unit 300. It should be noted that distributing the energy storage unit 400 in the non-display area 002 of the display panel 000 can ensure that the energy storage unit 400 does not affect the screen display of the display area 001.

[0058] Here, the energy storage unit 400 and multiple thermoelectric conversion units 300 can be connected in series and parallel, so that each thermoelectric conversion unit 300 can be connected to the energy storage unit 400 to ensure that each thermoelectric conversion unit 300 can charge the energy storage unit after converting heat into electrical energy.

[0059] In the embodiment of the present application, a large amount of heat is generated during the light emission of the light-emitting unit 200. The thermoelectric conversion unit 300 can convert the heat generated when the light-emitting unit 200 emits light into electrical energy, and after the thermoelectric conversion unit 300 converts the heat into electrical energy, it can charge the energy storage unit 400, so that the energy storage unit 400 can store the electrical energy output by the thermoelectric conversion unit 300. In this case, since the heat generated during the light emission of the light-emitting unit 200 can be converted into electrical energy by the thermoelectric conversion unit 300, the probability of the heat of the light-emitting unit 200 converging at the location of the light-emitting unit 200 can be effectively reduced through the thermoelectric conversion unit 300, and then the operating temperature of the light-emitting unit 200 can be effectively reduced, so that the service life of the light-emitting unit 200 in the display panel 000 is higher, thereby effectively improving the reliability of the display panel 000.

[0060] For example, please refer to Figure 3 and Figure 4 , Figure 3 is a temperature schematic diagram of a light emitting unit when no thermoelectric conversion unit is provided in an embodiment of the present application, Figure 4 000 is a schematic diagram of the temperature of the light emitting unit when a thermoelectric conversion unit is provided in an embodiment of the present application. Figure 3 As shown, the heat generated during the light-emitting process of the light-emitting unit 200 is difficult to dissipate, resulting in a high overall operating temperature of the light-emitting unit 200. When a thermoelectric conversion unit 300 is provided in the display panel 000, the heat generated during the light-emitting process of the light-emitting unit 200 can be promptly converted into electrical energy by the thermoelectric conversion unit 300, so that the overall operating temperature of the light-emitting unit 200 is low.

[0061] Optionally, the plurality of light-emitting units 200 in the display panel 000 may include a light-emitting diode (English: mini Light-Emitting Diode, abbreviated as LED). Since LED has the characteristic of low power consumption, when the light-emitting unit 200 includes an LED, the power consumption of the display panel 000 can be further reduced.

[0062] Here, the LED may be a normal-sized LED, a mini light-emitting diode (English: mini Light-Emitting Diode, abbreviated as: mini-LED), or a micro LED (English: Micro Light-Emitting Diode, abbreviated as: Micro-LED). It should be noted that since the size of the micro LED is relatively small, when the light-emitting unit 200 in the display panel 000 includes the micro LED, the resolution of the display panel 000 can be increased as much as possible while ensuring that the power consumption of the display panel 000 is low, so that the display panel 000 can display a better display picture.

[0063] In summary, the display panel provided by the embodiment of the present application includes: a substrate, a plurality of light-emitting units, a plurality of thermoelectric conversion units and an energy storage unit. In the process of light-emitting units emitting light, a large amount of heat will be generated. The thermoelectric conversion unit can convert the heat generated when the light-emitting unit emits light into electrical energy, and after the thermoelectric conversion unit converts the heat into electrical energy, it can charge the energy storage unit so that the energy storage unit can store the electrical energy output by the thermoelectric conversion unit. Since the heat generated in the process of light-emitting units emitting light can be converted into electrical energy by the thermoelectric conversion unit, the probability of the heat of the light-emitting units converging at the location of the light-emitting units can be effectively reduced through the thermoelectric conversion unit, thereby effectively reducing the operating temperature of the light-emitting units, so that the service life of the light-emitting units in the display panel is higher, thereby effectively improving the reliability of the display panel.

[0064] In the embodiment of the present application, there are multiple implementations of the positional relationship between the light emitting unit 200 and the thermoelectric conversion unit 300. The embodiment of the present application takes the following two implementations as examples for illustration:

[0065] The first optional implementation method is Figure 5 and Figure 6 As shown, Figure 5 is a top view of the arrangement of a light-emitting unit and a thermoelectric conversion unit in a display panel provided by an embodiment of the present application, Figure 6 yes Figure 5 The schematic diagram of the film structure of the display panel at BB' is shown. The multiple light-emitting units 200 and the multiple thermoelectric conversion units 300 of the display panel 000 may correspond one to one, and the orthographic projection of the light-emitting unit 200 on the substrate 100 may overlap with the orthographic projection of the corresponding thermoelectric conversion unit 300 on the substrate 100, wherein the thermoelectric conversion unit 300 may be closer to the substrate 100 than the light-emitting unit 200.

[0066] In one possible implementation, the orthographic projection of the light emitting unit 200 on the substrate 100 and the orthographic projection of the thermoelectric conversion unit 300 on the substrate 100 may only partially overlap; in another possible implementation, the orthographic projection of one of the light emitting unit 200 and the thermoelectric conversion unit 300 on the substrate 100 may be located within the orthographic projection of the other on the substrate 100. For example, the orthographic projection of the thermoelectric conversion unit 300 on the substrate 100 may be located within the orthographic projection of the light emitting unit 200 on the substrate 100.

[0067] Alternatively, if Figure 6 As shown, the display panel 000 may further include: a plurality of insulating functional layers 500. Here, the plurality of insulating functional layers 500 may all be located on one side of the substrate 100. The plurality of light-emitting units 200 in the display panel 000 are all located on the side of the plurality of insulating functional layers 500 away from the substrate 100, and the display panel 000 may have a first through hole V1 and a second through hole V2 that penetrate at least part of the insulating functional layer 500. Here, the plurality of insulating functional layers 500 in the display panel 000 may be respectively: a buffer layer 501, a gate insulating layer 502, an interlayer dielectric layer 503, a first planar layer 504, and a second planar layer 505 that are stacked in a direction vertically and away from the substrate 100.

[0068] In the embodiments of the present application, Figure 6 As shown, the orthographic projections of the first through hole V1 and the second through hole V2 on the substrate 100 may overlap with the orthographic projection of the light emitting unit 200 on the substrate 100. The thermoelectric conversion unit 300 in the display panel 000 may include: a first thermoelectric arm 301 located in the first through hole V1 and a second thermoelectric arm 302 located in the second through hole V2.

[0069] Here, the first thermoelectric arm 301 and the second thermoelectric arm 302 are both made of thermoelectric materials. Since the thermal conductivity of the thermoelectric material is much higher than the thermal conductivity of each insulating functional layer 500 in the display panel 000, by providing a first through hole V1 and a second through hole V2 penetrating at least a portion of the insulating functional layer 500 in the display panel 000, and providing the first thermoelectric arm 301 in the first through hole V1, and providing the second thermoelectric arm 302 in the second through hole V2, it can be ensured that the heat generated during the light emission process of the light emitting unit 200 is quickly conducted to the side facing the substrate 100 by the first thermoelectric arm 301 and the second thermoelectric arm 302, so as to ensure that the heat will not be accumulated at the location of the light emitting unit 200, and the operating temperature of the light emitting unit 200 can be further reduced.

[0070] Moreover, in this case, the temperature of the end of each thermoelectric arm in the thermoelectric conversion unit 300 facing the light-emitting unit 200 is higher than the temperature of the end of each thermoelectric arm facing the substrate 100. Here, the end of each thermoelectric arm in the thermoelectric conversion unit 300 facing the light-emitting unit 200 can be called the hot end of the thermoelectric material, and the end of each thermoelectric arm in the thermoelectric conversion unit 300 facing the substrate 100 can be called the cold end of the thermoelectric material. Since the thermoelectric material has the Seebeck effect, when there is a temperature difference between the hot end and the cold end of the thermoelectric material, the carriers (for example, electrons or holes) of the thermoelectric material will migrate from the hot end to the cold end, causing the carrier concentrations of the hot end and the cold end to deviate, which is manifested macroscopically as a potential difference between the hot end and the cold end of the thermoelectric material. Therefore, thermal energy can be converted into electrical energy through the thermoelectric material.

[0071] In the embodiment of the present application, the first thermoelectric arm 301 can be either a P-type thermoelectric arm or an N-type thermoelectric arm. Of course, the second thermoelectric arm 302 can also be either a P-type thermoelectric arm or an N-type thermoelectric arm. Among them, the P-type thermoelectric arm refers to a thermoelectric arm made of a P-type thermoelectric material, and the N-type thermoelectric arm refers to a thermoelectric arm made of an N-type thermoelectric material. Here, the holes in the P-type thermoelectric material will migrate from the hot end to the cold end, and the electrons in the N-type thermoelectric material will migrate from the hot end to the cold end. Since the first thermoelectric arm 301 and the second thermoelectric arm 302 can both be a P-type thermoelectric arm and an N-type thermoelectric arm, the embodiment of the present application will be schematically described with the following two possible situations.

[0072] The first possible situation is Figure 6 As shown, the first thermoelectric arm 301 in the thermoelectric conversion unit 300 may be one of a P-type thermoelectric arm and an N-type thermoelectric arm, and the second thermoelectric arm 302 in the thermoelectric conversion unit 300 may be the other of the P-type thermoelectric arm and the N-type thermoelectric arm.

[0073] In this case, the first thermoelectric arm 301 and the second thermoelectric arm 302 in the same thermoelectric conversion unit 300 may be connected in series at one end facing the light-emitting unit 200 to achieve superposition of the potential difference generated by the first thermoelectric arm 301 and the second thermoelectric arm 302. For example, after the first thermoelectric arm 301 and the second thermoelectric arm 302 in the same thermoelectric conversion unit 300 are connected in series at one end facing the light-emitting unit 200, and heat is generated during the light-emitting process of the light-emitting unit 200, the first carrier (one of the hole and the electron) in the first thermoelectric arm 301 may migrate from the hot end to the cold end, and at the same time, the second carrier (the other of the hole and the electron) in the second thermoelectric arm 302 may migrate from the hot end to the cold end. Since the charges of the first carrier and the second carrier are opposite, the potential difference generated between the hot end and the cold end of the first thermoelectric arm 301 is also opposite to the potential difference generated between the hot end and the cold end of the second thermoelectric arm 302, so that the potential difference generated between the hot end and the cold end of the first thermoelectric arm 301 and the potential difference generated between the hot end and the cold end of the second thermoelectric arm 302 can be superimposed, thereby ensuring that the thermoelectric conversion unit 300 can generate a higher potential difference, so that the thermoelectric conversion unit 300 has a higher efficiency when performing thermoelectric conversion.

[0074] Optional, such as Figure 6 As shown, the display panel 000 may further include: a plurality of first connection electrodes L1 and a plurality of second connection electrodes L2. The plurality of first connection electrodes L1 may correspond to the plurality of thermoelectric conversion units 300 one by one, each of the first connection electrodes L1 may be located on the side of the corresponding thermoelectric conversion unit 300 away from the substrate 100, and the two ends of each first connection electrode L1 may be overlapped with the first thermoelectric arm 301 and the second thermoelectric arm 302 in the corresponding thermoelectric conversion unit 300, respectively. In this way, the first thermoelectric arm 301 and the second thermoelectric arm 302 in the same thermoelectric conversion unit 300 may be connected in series, so that the potential difference generated between the hot end and the cold end of the first thermoelectric arm 301 and the potential difference generated between the hot end and the cold end of the second thermoelectric arm 302 may be superimposed.

[0075] The plurality of second connection electrodes L2 may be located on the side of the plurality of thermoelectric conversion units 300 facing the substrate 100, and a second connection electrode L2 may be distributed between each two adjacent thermoelectric conversion units 300, and for two adjacent thermoelectric conversion units 300, the first thermoelectric arm 301 in one thermoelectric conversion unit 300 and the second thermoelectric arm 302 in another thermoelectric conversion unit 300 are respectively overlapped with the two ends of the same second connection electrode L2, and the second connection electrode L2 is located between the two adjacent thermoelectric conversion units 300. In this way, the thermoelectric conversion units 300 in the same row of thermoelectric conversion units 300 may be connected in series.

[0076] Exemplarily, the second connection electrode L2 in the display panel 000 may be located on the side of the buffer layer 501 facing the substrate 100. In the present application, the display panel 000 may further include: a first insulating dielectric layer 700 located on the side of the buffer layer 501 facing the substrate 100, and the first insulating dielectric layer 700 may be distributed between any two adjacent second connection electrodes L2, and the first insulating dielectric layer 700 is used to insulate any two adjacent second connection electrodes L2, so that the potential difference generated by any two adjacent thermoelectric conversion units 300 can be superimposed.

[0077] It should be noted that the first thermoelectric arm 301 and the second thermoelectric arm 302 in each thermoelectric conversion unit 300 are connected in series through the first connection electrode L1, so that the potentials generated by the first thermoelectric arm 301 and the second thermoelectric arm 302 can be superimposed; and different thermoelectric conversion units 300 are connected in series through the second connection electrode L2, so that the potentials generated between different thermoelectric conversion units 300 can be superimposed, and output to the energy storage unit 400 after superposition. In this way, the energy storage unit 400 can store more electric energy and increase the energy utilization rate of the display panel 000; at the same time, the energy storage unit 400 can output more electric energy to adapt to the use of high-power electrical components.

[0078] In an embodiment of the present application, the display panel 000 may further include: two pin transfer electrodes L0 connected to the light emitting unit 200. Among them, the light emitting unit 200 may have two pins P0, which are distributed as: a positive pin and a negative pin. The two pins in the light emitting unit 200 may be electrically connected to the two pin transfer electrodes L0, respectively. Here, the display panel 000 generally also includes: a pixel driving circuit P1, which is electrically connected to the light emitting unit 200 through the pin transfer electrode L0, and the pixel driving circuit P1 can send a driving signal to the light emitting unit 200 through the pin transfer electrode L0, so that the light emitting unit 200 can emit light of corresponding intensity.

[0079] It should be noted that there are many ways to distribute the first connection electrodes L1 in the display panel 000 in the display panel 000 . The present application embodiment uses the following two ways as examples for schematic description.

[0080] The first way, such as Figure 6 As shown, the first connection electrode L1 and the pin transfer electrode L0 in the display panel 000 are arranged in different layers, and the first connection electrode L1 is closer to the substrate 100 than the pin transfer electrode L0.

[0081] It can be understood that the different-layer arrangement of two structures in the embodiments of the present application means that the film layers where the two structures are located are different, and other insulating layers are usually distributed between the two film layers.

[0082] For example, the first connection electrode L1 may be located on the side of the first flat layer 504 facing away from the substrate 100, and the pin transfer electrode L0 may be located on the side of the second flat layer 505 facing away from the substrate 100. To this end, the second flat layer 505 may be distributed between the first connection electrode L1 and the pin transfer electrode L0. In this case, the first through hole V1 and the second through hole V2 in the display panel 000 may sequentially penetrate the first flat layer 504, the interlayer dielectric layer 503, the gate insulating layer 502 and the buffer layer 501.

[0083] The second method, such as Figure 7 As shown, Figure 7 yes Figure 5 Another schematic diagram of the film layer structure of the display panel at BB' is shown. The first connecting electrode L1 and the pin transfer electrode L0 in the display panel 000 are arranged in the same layer, and the first connecting electrode L1 corresponding to the thermoelectric conversion unit 300 can be located between the two pin transfer electrodes L0 electrically connected to the corresponding light-emitting unit 200.

[0084] It can be understood that, in the embodiment of the present application, two structures are arranged on the same layer, which means that the two structures are distributed on the same membrane layer structure at the same time.

[0085] For example, the first connection electrode L1 and the pin transfer electrode L0 are both located and distributed on the side of the first flat layer 504 away from the substrate 100. It should also be noted that when the first connection electrode L1 and the pin transfer electrode L0 are arranged on the same layer, the display panel 000 may need to be provided with a second flat layer 505, which can effectively simplify the manufacturing process of the display panel 000.

[0086] Optionally, the materials of the first connection electrode L1 and the pin transfer electrode L0 may be the same or different. Here, when the materials of the first connection electrode L1 and the pin transfer electrode L0 are the same, the first connection electrode L1 and the pin transfer electrode L0 may be formed simultaneously using the same patterning process. In this way, the manufacturing process of the display panel 000 may be further simplified.

[0087] It should be noted that, since the light-emitting unit 200 generates heat mainly in the vicinity of the two pins P0 of the light-emitting unit 200 during the light-emitting process, after the first connection electrode L1 is provided between the two pin transfer electrodes L0 electrically connected to the two pins P0, the temperature of the hot ends of the first thermoelectric arm 301 and the second thermoelectric arm 302 can be ensured to be higher, so as to increase the temperature difference between the hot end and the cold end of the first thermoelectric arm 301 and the second thermoelectric arm 302, thereby ensuring that the first thermoelectric arm 301 and the second thermoelectric arm 302 can better convert heat into electrical energy.

[0088] The second possible situation is Figure 8 As shown, Figure 8 yes Figure 5 The schematic diagram of another film structure of the display panel at BB' is shown, the first thermoelectric arm 301 and the second thermoelectric arm 302 in the thermoelectric conversion unit 300 are both P-type thermoelectric arms, or the first thermoelectric arm 301 and the second thermoelectric arm 302 in the thermoelectric conversion unit 300 are both N-type thermoelectric arms.

[0089] In this case, the end of the first thermoelectric arm 301 in the same thermoelectric conversion unit 300 facing the light-emitting unit 200 and the end of the second thermoelectric arm 302 facing the substrate 100 can be connected in series to achieve superposition of the potential difference generated by the first thermoelectric arm 301 and the second thermoelectric arm 302. For example, after the end of the first thermoelectric arm 301 in the same thermoelectric conversion unit 300 facing the light-emitting unit 200 and the end of the second thermoelectric arm 302 facing the substrate 100 are connected in series, and heat is generated during the light-emitting unit 200, the first carriers (holes or electrons) in the first thermoelectric arm 301 and the second thermoelectric arm 302 can migrate from the hot end to the cold end. Since one end of the first thermoelectric arm 301 facing the light-emitting unit 200 and one end of the second thermoelectric arm 302 facing the substrate 100 are connected in series, the potential difference generated between the hot end and the cold end of the first thermoelectric arm 301 and the potential difference generated between the hot end and the cold end of the second thermoelectric arm 302 can be superimposed, thereby ensuring that the thermoelectric conversion unit 300 can generate a higher potential difference, so that the thermoelectric conversion unit 300 has a higher efficiency when performing thermoelectric conversion.

[0090] Optional, such as Figure 8 As shown, the display panel 000 may also have a third through hole V3 and a fourth through hole V4 penetrating at least a portion of the insulating functional layer 500. The third through hole V3 may be arranged between the first through hole V1 and the second through hole V2, and the fourth through hole V4 may be arranged on the side of the second through hole V2 away from the first through hole V1. That is, the second through hole V2 is located between the third through hole V3 and the fourth through hole V4. In this embodiment, as Figure 8 As shown, the first through hole V1 , the second through hole V2 , the third through hole V3 and the fourth through hole V4 may sequentially penetrate the first planar layer 504 , the interlayer dielectric layer 503 , the gate insulating layer 502 and the buffer layer 501 in a direction perpendicular to the substrate 100 .

[0091] In this application, please refer to Figure 8The thermoelectric conversion unit 300 may further include: a first conductive arm 303 located in the third through hole V3 and a second conductive arm 304 located in the fourth through hole V4. The display panel 000 may further include: a plurality of third connection electrodes L3, a plurality of fourth connection electrodes L4, a plurality of fifth connection electrodes L5 and a plurality of sixth connection electrodes L6.

[0092] The plurality of third connection electrodes L3 and the plurality of fourth connection electrodes L4 in the display panel 000 may correspond to the plurality of thermoelectric conversion units 300 one by one, and the third connection electrode L3 and the fourth connection electrode L4 may be located on the side of the corresponding thermoelectric conversion unit 300 away from the substrate 100. For example, the third connection electrode L3 and the fourth connection electrode L4 may be located on the side of the first flat layer 504 away from the substrate 100. In a possible case, the third connection electrode L3 and the fourth connection electrode L4 may be arranged in the same layer and made of the same material. Here, the two ends of the third connection electrode L3 may be overlapped with the first thermoelectric arm 301 and the first conductive arm 303 in the corresponding thermoelectric conversion unit 300, respectively, and the two ends of the fourth connection electrode L4 may be overlapped with the second conductive arm 304 and the second thermoelectric arm 302 in the corresponding thermoelectric conversion unit 300, respectively.

[0093] The plurality of fifth connection electrodes L5 in the display panel 000 may correspond to the plurality of thermoelectric conversion units 300 one by one, and the fifth connection electrode L5 may be located on the side of the corresponding thermoelectric conversion unit 300 facing the substrate 100. For example, the fifth connection electrode L5 may be located on the side of the buffer layer 501 facing the substrate 100. Here, both ends of the fifth connection electrode L5 may be overlapped with the first conductive arm 303 and the second thermoelectric arm 302 in the corresponding thermoelectric conversion unit 300, respectively.

[0094] The multiple sixth connection electrodes L6 in the display panel 000 can all be located on the side of the multiple thermoelectric conversion units 300 facing the substrate 100. For example, the sixth connection electrode L6 can be located on the side of the buffer layer 501 facing the substrate 100. In a possible case, the fifth electrode L5 and the sixth electrode L6 can be arranged in the same layer and have the same material. Here, a sixth connection electrode L6 can be distributed between two adjacent thermoelectric conversion units 300, and in two adjacent thermoelectric conversion units 300, the first thermoelectric arm 301 in one thermoelectric conversion unit 300 can be overlapped with the second thermoelectric arm 302 in another thermoelectric conversion unit 300, respectively, with the two ends of the same sixth connection electrode L6. Optionally, the first conductive arm 303 and the second conductive arm 304 can be made of materials with good thermal conductivity and electrical conductivity such as graphene, carbon nanotubes, gold, silver, copper, titanium, lead, etc.

[0095] In this case, the third connection electrode L3 is used to connect the first conductive arm 303 and the end of the first thermoelectric arm 301 away from the substrate 100 in series, the fourth connection electrode L4 is used to connect the second thermoelectric arm 302 and the end of the second conductive arm 304 away from the substrate 100 in series, and the fifth connection electrode L5 is used to connect the second conductive arm 304 and the end of the first thermoelectric arm 301 close to the substrate 100 in series. In this way, the end of the first thermoelectric arm 301 facing the light-emitting unit 200 in the same thermoelectric conversion unit 300 can be connected in series with the end of the second thermoelectric arm 302 facing the substrate 100, so that the potential difference generated between the hot end and the cold end of the first thermoelectric arm 301 can be superimposed with the potential difference generated between the hot end and the cold end of the second thermoelectric arm 302. The sixth connection electrode L6 is used to connect the thermoelectric conversion units 300 in the same row of thermoelectric conversion units 300 in series.

[0096] In the embodiment of the present application, the display panel 000 may further include: a second insulating dielectric layer 800 partially located between the adjacently distributed fifth connection electrode L5 and the sixth connection electrode L6, and the second insulating dielectric layer 800 is used to connect the first thermoelectric arm 301, the second thermoelectric arm 302, the first conductive arm 303, and the second conductive arm 304 in series at one end close to the substrate 100. Here, the second insulating dielectric layer 800 may be made of a material with good insulation properties such as silicon dioxide, silicon oxynitride, and silicon nitride.

[0097] Optionally, for the display panel including the first through hole V1 and the second through hole V2 in the above embodiment, please refer to Fig. 9 , Fig. 9 yes Figure 5 Another schematic diagram of the film structure of the display panel at BB' is shown. The display panel 000 may also include: a heat conduction layer 600 attached to the inner wall of the first through hole V1 and the inner wall of the second through hole V2. The first thermoelectric arm 301 is disposed in contact with the heat conduction layer 600 in the first through hole V1, and the second thermoelectric arm 302 is disposed in contact with the heat conduction layer 600 in the second through hole V2.

[0098] Exemplarily, the heat conduction layer 600 can be made of a material with good thermal conductivity and electrical conductivity. Here, the heat conduction layer 600 can be made of a material with good thermal conductivity and electrical conductivity, such as graphene, carbon nanotubes, gold, silver, copper, titanium, lead, etc. It should be noted that by providing the heat conduction layer 600, the heat conduction capacity of the first thermoelectric arm 301 and the second thermoelectric arm 302 is enhanced, the heat dissipation capacity of the thermoelectric conversion unit 300 is further increased, and the possibility of heat accumulation in the light-emitting unit 200 is reduced.

[0099] In addition, the first thermoelectric arm 301 and the second thermoelectric arm 302 can be processed according to the following process steps: the first through hole V1 and the second through hole V2 from the first flat layer 504 to the buffer layer 501 are made by etching, and then the first thermoelectric arm 301 and the second thermoelectric arm 302 are made in the first through hole V1 and the second through hole V2 by magnetron sputtering, CVD, thermal evaporation, electrochemical deposition, printing, etc. It should also be noted that if the first thermoelectric arm 301 and the second thermoelectric arm 302 are prepared by electrochemical deposition, the heat conduction layer 600 can also act as a seed layer in the preparation process to improve the efficiency and quality of electrochemical deposition.

[0100] The second optional implementation method is Fig.10 and Fig.11 As shown, Fig.10 is a top view of the arrangement of light-emitting units and thermoelectric conversion units in another display panel provided by an embodiment of the present application, Fig.11 yes Fig.10 The schematic diagram of the film structure of the display panel at CC' is shown. The light-emitting unit 200 in the display panel 000 may be arranged in the same layer as the thermoelectric conversion unit 300, and the orthographic projection of the light-emitting unit 200 on the substrate 100 may not overlap with the orthographic projection of the thermoelectric conversion unit 300 on the substrate 100, and one thermoelectric conversion unit 300 may be distributed between two adjacent light-emitting units 200.

[0101] Optional, such as Fig.10 and Fig.11 As shown, the thermoelectric conversion unit 300 may include: a first thermoelectric layer 305 and a second thermoelectric layer 306 arranged in the same layer. The first thermoelectric layer 305 and the second thermoelectric layer 306 in each thermoelectric conversion unit 300 may be located between two corresponding adjacent light-emitting units 200. Here, the first thermoelectric layer 305 and the second thermoelectric layer 306 in the thermoelectric conversion unit 300 may be located on the side of the second planar layer 505 away from the substrate 100.

[0102] In the embodiment of the present application, the first thermoelectric layer 305 may be one of a P-type thermoelectric layer and an N-type thermoelectric layer, and the second thermoelectric layer 306 may be the other of the P-type thermoelectric layer and the N-type thermoelectric layer. In one possible implementation, the first thermoelectric layer 305 may be a P-type thermoelectric layer, and the second thermoelectric layer 306 may be an N-type thermoelectric layer; in another possible implementation, the first thermoelectric layer 305 may be an N-type thermoelectric layer, and the second thermoelectric layer 306 may be a P-type thermoelectric layer. Wherein, the P-type thermoelectric layer and the N-type thermoelectric layer are both thermoelectric layers made of thermoelectric materials, the P-type thermoelectric layer includes a thermoelectric layer made of a P-type semiconductor material, and the N-type thermoelectric layer includes a thermoelectric layer made of an N-type semiconductor material.

[0103] In this case, the temperature of the end of each thermoelectric layer in the thermoelectric conversion unit 300 facing the light-emitting unit 200 is higher than the temperature of the end of each thermoelectric layer away from the light-emitting unit 200. Here, the end of each thermoelectric layer in the thermoelectric conversion unit 300 facing the light-emitting unit 200 can be called the hot end of the thermoelectric material, and the end of each thermoelectric layer in the thermoelectric conversion unit 300 away from the light-emitting unit 200 can be called the cold end of the thermoelectric material. Here, for a P-type thermoelectric layer, when there is a temperature difference between the hot end and the cold end of the P-type thermoelectric layer, the holes of the P-type thermoelectric layer will migrate from the hot end to the cold end; for an N-type thermoelectric layer, when there is a temperature difference between the hot end and the cold end of the N-type thermoelectric layer, the electrons of the N-type thermoelectric layer will migrate from the hot end to the cold end.

[0104] Optional, such as Fig.10 and Fig.11 As shown, the display panel 000 may further include: a plurality of seventh connection electrodes L7 and a plurality of eighth connection electrodes L8. The seventh connection electrode L7 and the eighth connection electrode L8 are both disposed in the same layer as the first thermoelectric layer 305 and the second thermoelectric layer 306. That is, the seventh connection electrode L7 and the eighth connection electrode L8 may both be located on the side of the second planar layer 505 away from the substrate 100.

[0105] Here, the plurality of seventh connection electrodes L7 in the display panel 000 may correspond to the plurality of thermoelectric conversion units 300 one by one, and each of the seventh connection electrodes L7 is located between the first thermoelectric layer 305 and the second thermoelectric layer 306 in the corresponding thermoelectric conversion unit 300, and is respectively overlapped with the first thermoelectric layer 305 and the second thermoelectric layer 306. In this way, the first thermoelectric layer 305 and the second thermoelectric layer 306 in the same thermoelectric conversion unit 300 may be connected in series, so that the potential difference generated between the hot end and the cold end of the first thermoelectric layer 305 and the potential difference generated between the hot end and the cold end of the second thermoelectric layer 306 may be superimposed.

[0106] For two thermoelectric conversion units 300 distributed on both sides of the same light-emitting unit 200, the side of the first thermoelectric layer 305 in one thermoelectric conversion unit 300 away from the second thermoelectric layer 306 and the side of the second thermoelectric layer 306 in the other thermoelectric conversion unit 300 away from the first thermoelectric layer 305 are respectively overlapped with the two ends of the same eighth connection electrode L8. In this way, the thermoelectric conversion units 300 in the same row of thermoelectric conversion units 300 can be connected in series.

[0107] Optional, please refer to Fig.10The eighth connecting electrode L8 also includes a ring-shaped sub-electrode L81, and a first sub-electrode L82 and a second sub-electrode L83 which are electrically connected to the two sides of the ring-shaped sub-electrode L81 respectively. The first sub-electrode L82 overlaps with the side of the first thermoelectric layer 305 in one thermoelectric conversion unit 300 which is away from the second thermoelectric layer 306, and the second sub-electrode L83 overlaps with the side of the first thermoelectric layer 305 in another thermoelectric conversion unit 300 which is away from the second thermoelectric layer 306. The orthographic projection of the light-emitting unit 200 on the substrate 100 is located in the area enclosed by the orthographic projection of the ring-shaped sub-electrode L81 on the substrate 100.

[0108] It should be noted that, by providing the annular sub-electrode L81, the first sub-electrode L82 and the second sub-electrode L83, and by positioning the orthographic projection of the light-emitting unit 200 on the substrate 100 within the area enclosed by the orthographic projection of the eighth connecting electrode L8 on the substrate 100, when the light-emitting unit 200 emits light, the annular sub-electrode L81, the first sub-electrode L82 and the second sub-electrode L83 can shield the light directed toward the side wall of the display panel 000 to a certain extent, thereby reducing the possibility of cross-color or light being absorbed by other layers and generating waste heat.

[0109] Optional, please refer to Fig.12 , Fig.12 yes Fig.10 Another schematic diagram of the film structure of the display panel at CC' is shown. The distance between the side of the annular sub-electrode L81 facing away from the substrate 100 and the substrate 100 is greater than or equal to the distance between the side of the light-emitting unit 200 facing away from the substrate 100 and the substrate 100. Here, the annular sub-electrode L81 can be made of materials with good thermal conductivity and electrical conductivity, such as graphene, carbon nanotubes, gold, silver, copper, titanium, lead, etc.

[0110] In this case, on the one hand, the annular sub-electrode L81 can effectively absorb the light emitted to the side by the light-emitting unit 200 to avoid cross-color or light being absorbed by other structures to generate waste heat; on the other hand, the annular sub-electrode L81 can also actively convert the light emitted to the side by the light-emitting unit 200 into thermal energy that can be used by the first thermoelectric layer 305 and the second thermoelectric layer 306, thereby constructing a higher temperature difference in the plane direction of the display panel 000 to improve the conversion efficiency of thermal energy.

[0111] In one possible scenario, Fig.12 As shown, the first thermoelectric layer 305 , the second thermoelectric layer 306 , the seventh connecting electrode L7 , and the eighth connecting electrode L8 are flush with each other on the side facing away from the substrate 100 .

[0112] In the embodiments of the present application, Fig.13 As shown, Fig.13Schematic diagram of a film structure of a display panel provided by another embodiment of the present application. The display panel 000 may further include: a connection protection layer 900 located on the side of the second flat layer 505 away from the substrate 100. The connection protection layer 900 may improve the connection strength of the light emitting unit 200 and the display panel.

[0113] Optionally, the display panel 000 may further include: an adhesive buffer layer 1000 covering the plurality of light emitting units 200, and a protective cover plate 1100 bonded to the side of the adhesive buffer layer 1000 facing away from the substrate 100. The adhesive buffer layer 1000 and the protective cover plate 1100 may improve the protection capability of the light emitting units 200.

[0114] In summary, the display panel provided by the embodiment of the present application includes: a substrate, a plurality of light-emitting units, a plurality of thermoelectric conversion units and an energy storage unit. In the process of light-emitting units emitting light, a large amount of heat will be generated. The thermoelectric conversion unit can convert the heat generated when the light-emitting unit emits light into electrical energy, and after the thermoelectric conversion unit converts the heat into electrical energy, it can charge the energy storage unit so that the energy storage unit can store the electrical energy output by the thermoelectric conversion unit. Since the heat generated in the process of light-emitting units emitting light can be converted into electrical energy by the thermoelectric conversion unit, the probability of the heat of the light-emitting units converging at the location of the light-emitting units can be effectively reduced through the thermoelectric conversion unit, thereby effectively reducing the operating temperature of the light-emitting units, so that the service life of the light-emitting units in the display panel is higher, thereby effectively improving the reliability of the display panel.

[0115] The embodiment of the present application also provides a display device. The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, etc. The display device may include a drive module and the display panel 000 in the above embodiment. The drive module may be electrically connected to the drive layer in the display panel 000, and the drive module is used to provide a drive signal to the light-emitting unit 200.

[0116] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0117] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: The display panel has a display area and a non-display area located outside the display area; the display panel includes: substrate; A plurality of light-emitting units and a plurality of thermoelectric conversion units located on one side of the substrate and distributed in the display area; and, an energy storage unit located at one side of the substrate and distributed in the non-display area, the energy storage unit being electrically connected to the thermoelectric conversion unit; The thermoelectric conversion unit is used to convert the heat generated by the light-emitting unit when emitting light into electrical energy, and then charge the energy storage unit.

2. The display panel according to claim 1, characterized in that: The multiple light-emitting units correspond to the multiple thermoelectric conversion units one by one, the orthographic projections of the light-emitting units on the substrate overlap with the orthographic projections of the corresponding thermoelectric conversion units on the substrate, and the thermoelectric conversion units are closer to the substrate than the light-emitting units.

3. The display panel according to claim 2, characterized in that: The display panel further comprises: a plurality of insulating functional layers located on one side of the substrate, the plurality of light-emitting units are all located on a side of the plurality of insulating functional layers away from the substrate, the display panel has a first through hole and a second through hole penetrating at least a portion of the insulating functional layers, and the orthographic projections of the first through hole and the second through hole on the substrate overlap with the orthographic projection of the same light-emitting unit on the substrate; Wherein, the thermoelectric conversion unit includes: a first thermoelectric arm located in the first through hole and a second thermoelectric arm located in the second through hole.

4. The display panel according to claim 3, characterized in that: The first thermoelectric arm is one of a P-type thermoelectric arm and an N-type thermoelectric arm, and the second thermoelectric arm is the other of the P-type thermoelectric arm and the N-type thermoelectric arm.

5. The display panel according to claim 4, characterized in that: The display panel further includes: a plurality of first connection electrodes and a plurality of second connection electrodes; The plurality of first connecting electrodes correspond to the plurality of thermoelectric conversion units one by one, the first connecting electrodes are located on a side of the corresponding thermoelectric conversion unit away from the substrate, and two ends of the first connecting electrodes are respectively overlapped with the first thermoelectric arm and the second thermoelectric arm in the corresponding thermoelectric conversion unit; The multiple second connecting electrodes are all located on the side of the multiple thermoelectric conversion units facing the substrate, one second connecting electrode is distributed between two adjacent thermoelectric conversion units, and for two adjacent thermoelectric conversion units, the first thermoelectric arm in one thermoelectric conversion unit and the second thermoelectric arm in the other thermoelectric conversion unit are respectively overlapped with the two ends of the same second connecting electrode.

6. The display panel according to claim 5, characterized in that: The display panel further includes: two pin transfer electrodes electrically connected to the light emitting unit; The pin transfer electrode and the first connection electrode are arranged in different layers, and the first connection electrode is closer to the substrate than the pin transfer electrode; Alternatively, the pin transfer electrode and the first connecting electrode are arranged in the same layer, and the first connecting electrode corresponding to the thermoelectric conversion unit is located between the two pin transfer electrodes electrically connected to the corresponding light-emitting unit.

7. The display panel according to claim 3, characterized in that: The first thermoelectric arm and the second thermoelectric arm are both P-type thermoelectric arms, or the first thermoelectric arm and the second thermoelectric arm are both N-type thermoelectric arms.

8. The display panel according to claim 7, characterized in that: The display panel further comprises a third through hole and a fourth through hole penetrating at least a portion of the insulating functional layer, wherein the third through hole is distributed between the first through hole and the second through hole, and the fourth through hole is arranged on a side of the second through hole away from the first through hole; The thermoelectric conversion unit further includes: a first conductive arm located in the third through hole and a second conductive arm located in the fourth through hole; The display panel further includes: a plurality of third connection electrodes, a plurality of fourth connection electrodes, a plurality of fifth connection electrodes and a plurality of sixth connection electrodes; The plurality of third connecting electrodes and the plurality of fourth connecting electrodes are respectively corresponding to the plurality of thermoelectric conversion units, the third connecting electrodes and the fourth connecting electrodes are respectively located on a side of the corresponding thermoelectric conversion unit away from the substrate, and two ends of the third connecting electrode are respectively overlapped with the first thermoelectric arm and the first conductive arm in the corresponding thermoelectric conversion unit, and two ends of the fourth connecting electrode are respectively overlapped with the second conductive arm and the second thermoelectric arm in the corresponding thermoelectric conversion unit; The plurality of fifth connecting electrodes correspond to the plurality of thermoelectric conversion units one by one, the fifth connecting electrodes are located on a side of the corresponding thermoelectric conversion unit facing the substrate, and two ends of the fifth connecting electrodes are respectively overlapped with the first conductive arm and the second thermoelectric arm in the corresponding thermoelectric conversion unit; The multiple sixth connecting electrodes are all located on the side of the multiple thermoelectric conversion units facing the substrate, one sixth connecting electrode is distributed between two adjacent thermoelectric conversion units, and in two adjacent thermoelectric conversion units, the first thermoelectric arm in one thermoelectric conversion unit and the second thermoelectric arm in the other thermoelectric conversion unit are respectively overlapped with the two ends of the same sixth connecting electrode.

9. The display panel according to any one of claims 3 to 8, characterized in that: The display panel further includes: a heat conducting layer attached to the inner wall of the first through hole and the inner wall of the second through hole; The first thermoelectric arm is disposed in contact with the heat conducting layer in the first through hole, and the second thermoelectric arm is disposed in contact with the heat conducting layer in the second through hole.

10. The display panel according to claim 1, characterized in that: The light emitting unit and the thermoelectric conversion unit are arranged in the same layer, and the orthographic projection of the light emitting unit on the substrate does not overlap with the orthographic projection of the thermoelectric conversion unit on the substrate, and one thermoelectric conversion unit is distributed between two adjacent light emitting units.

11. The display panel according to claim 10, characterized in that: The thermoelectric conversion unit comprises: a first thermoelectric layer and a second thermoelectric layer arranged in the same layer; The first thermoelectric layer is one of a P-type thermoelectric layer and an N-type thermoelectric layer, and the second thermoelectric layer is the other of the P-type thermoelectric layer and the N-type thermoelectric layer.

12. The display panel according to claim 11, characterized in that: The display panel further includes: a plurality of seventh connection electrodes and a plurality of eighth connection electrodes, wherein the seventh connection electrodes and the eighth connection electrodes are both disposed on the same layer as the first thermoelectric layer and the second thermoelectric layer; The plurality of seventh connection electrodes correspond to the plurality of thermoelectric conversion units one by one, and the seventh connection electrodes are located between the first thermoelectric layer and the second thermoelectric layer in the corresponding thermoelectric conversion unit, and overlap the first thermoelectric layer and the second thermoelectric layer respectively; For the two thermoelectric conversion units distributed on both sides of the same light-emitting unit, the side of the first thermoelectric layer in one thermoelectric conversion unit facing away from the second thermoelectric layer and the side of the second thermoelectric layer in the other thermoelectric conversion unit facing away from the first thermoelectric layer are respectively overlapped with the two ends of the same eighth connecting electrode.

13. The display panel according to claim 12, characterized in that: The eighth connecting electrode includes: a ring-shaped sub-electrode, and a first sub-electrode and a second sub-electrode electrically connected to two sides of the ring-shaped sub-electrode respectively, the first sub-electrode overlaps the side of the first thermoelectric layer in one of the thermoelectric conversion units facing away from the second thermoelectric layer, the second sub-electrode overlaps the side of the first thermoelectric layer in another of the thermoelectric conversion units facing away from the second thermoelectric layer, and the orthographic projection of the light-emitting unit on the substrate is located within the area enclosed by the orthographic projection of the ring-shaped sub-electrode on the substrate.

14. The display panel according to claim 13, characterized in that: The distance between the substrate and a side of the annular sub-electrode facing away from the substrate is greater than or equal to the distance between the substrate and a side of the light-emitting unit facing away from the substrate.

15. A display device, characterized in that: include: A driving module, and a display panel electrically connected to the driving module, wherein the display panel is the display panel according to any one of claims 1 to 14.

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