A light-emitting panel and a light-emitting device

Abstract

An embodiment of the present invention discloses a light-emitting panel and a light-emitting device. The light-emitting panel includes a light-emitting layer for emitting light; at least one temperature adjustment layer disposed on at least one side of the light-emitting layer for adjusting the temperature of the light-emitting layer; when the temperature of the light-emitting panel is greater than or equal to a preset phase change temperature, the temperature adjustment layer is converted from a first phase change state to a second phase change state; wherein, the infrared emissivity of the temperature adjustment layer in the second phase change state is greater than that of the temperature adjustment layer in the first phase change state. The technical solution provided by the embodiment of the present invention improves the heat dissipation ability of the light-emitting panel and increases the service life of the light-emitting panel.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of lighting technology, and in particular, to a lighting panel and a lighting device. Background Art

[0002] With the development of lighting technology, people have higher and higher requirements for lighting panels. Due to the characteristics of the planar light source of existing lighting panels, the temperature change of the lighting device itself is not significant. However, when the required brightness is high, the power consumption of the lighting device increases. If the area of simultaneous light emission is too large, it will also cause a significant increase in temperature and difficulty in heat dissipation. Moreover, existing lighting devices generally include organic materials. Due to the generally low heat resistance of organic materials, the lifespan of the lighting device decreases exponentially with the increase in temperature.

[0003] The heat dissipation effect of existing lighting panels is poor, affecting the service life of the lighting panels, which has become an urgent problem to be solved in the industry. Summary of the Invention

[0004] Embodiments of the present invention provide a lighting panel and a lighting device to solve the problem that the heat dissipation ability of the lighting panel is weak, affecting the service life of the lighting device.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, embodiments of the present invention provide a lighting panel, including:

[0007] A light-emitting layer for emitting light;

[0008] At least one temperature adjustment layer disposed on at least one side of the light-emitting layer for adjusting the temperature of the light-emitting layer;

[0009] When the temperature of the lighting panel is greater than or equal to a preset phase change temperature, the temperature adjustment layer is used to convert from a first phase change state to a second phase change state; wherein, the infrared emissivity of the temperature adjustment layer in the second phase change state is greater than that of the temperature adjustment layer in the first phase change state.

[0010] Optionally, the temperature adjustment layer includes a vanadium dioxide superstructure material;

[0011] The preset phase change temperature is adjusted by doping tungsten in the temperature adjustment layer; preferably, the preset phase change temperature is room temperature.

[0012] Optionally, the second phase change state includes a metallic state, and the infrared emissivity of the temperature adjustment layer in the metallic state is higher than 90%, so as to reduce the temperature of the lighting panel by means of radiation heat dissipation;

[0013] The first phase change state includes an insulating state, and the infrared emissivity of the temperature regulation layer in the insulating state is less than 20%, so as to close the infrared radiation heat dissipation channel.

[0014] Optionally, the light-emitting layer includes:

[0015] A first electrode layer, an organic light-emitting layer, and a second electrode layer that are sequentially stacked;

[0016] The temperature regulation layer is disposed on the side of the first electrode layer away from the organic light-emitting layer, and the temperature regulation layer is further configured to supplement the conductivity of the first electrode layer when in the metallic state; and / or,

[0017] The temperature regulation layer is disposed on the side of the second electrode layer away from the organic light-emitting layer, and the temperature regulation layer is further configured to supplement the conductivity of the second electrode layer when in the metallic state.

[0018] Optionally, the light-emitting panel further includes:

[0019] A substrate, and the light-emitting layer is disposed on one side of the substrate;

[0020] The temperature regulation layer is disposed on the side of the substrate away from the light-emitting layer.

[0021] Optionally, the light-emitting panel further includes:

[0022] A packaging layer, and the packaging layer is disposed on the side of the light-emitting layer away from the substrate;

[0023] The temperature regulation layer is disposed on the side of the packaging layer away from the light-emitting layer.

[0024] Optionally, the packaging layer includes:

[0025] At least one first packaging layer and at least one second packaging layer that are stacked; the first packaging layer and the second packaging layer are disposed in a one-to-one correspondence;

[0026] The temperature regulation layer is disposed between the adjacent first packaging layer and the second packaging layer.

[0027] Optionally, the temperature regulation layer includes:

[0028] A first temperature regulation layer and a second temperature regulation layer; the first temperature regulation layer and the second temperature regulation layer are disposed on both sides of the light-emitting layer, or the first temperature regulation layer and the second temperature regulation layer are both disposed on the packaging layer;

[0029] The first temperature regulation layer and the second temperature regulation layer are configured for radiative heat dissipation and / or convective heat dissipation; wherein, the temperature regulation layer located on the light-emitting side of the light-emitting panel can be a patterned structure.

[0030] Optionally, the light-emitting panel further includes:

[0031] The side surface along the thickness direction of the light-emitting panel;

[0032] The temperature regulation layer includes a third temperature regulation layer, and the third temperature regulation layer completely covers the side surface of the light-emitting panel.

[0033] According to another aspect provided by the present invention, an embodiment of the present invention provides a light-emitting device, including: the light-emitting panel proposed in any of the above items.

[0034] The phase change state of the temperature regulation layer of the light-emitting panel provided by the embodiment of the present invention can be switched between a first phase change state and a second phase change state. The temperature regulation layer is disposed on one side of the light-emitting layer, so that the temperature regulation layer can regulate the temperature of the light-emitting layer. This setting improves the heat dissipation ability of the light-emitting panel, improves the service life of the light-emitting panel, and solves the problem that the weak heat dissipation ability of the light-emitting panel affects the service life of the light-emitting device. When the ambient temperature where the light-emitting panel is located is lower than the preset phase change temperature, the temperature regulation layer is in an insulating state, closing the infrared radiation channel, and the heat preservation effect can be achieved, avoiding the increase in voltage of the light-emitting panel with the decrease of the ambient temperature and resulting in serious increase in power consumption. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0036] Figure 1 It is a schematic structural diagram of a light-emitting panel provided by an embodiment of the present invention;

[0037] Figure 2 It is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention;

[0038] Figure 3 It is a schematic structural diagram of yet another light-emitting panel provided by an embodiment of the present invention;

[0039] Figure 4 It is a schematic structural diagram of yet another light-emitting panel provided by an embodiment of the present invention;

[0040] Figure 5 It is a schematic structural diagram of yet another light-emitting panel provided by an embodiment of the present invention;

[0041] Figure 6 It is a schematic structural diagram of yet another light-emitting panel provided by an embodiment of the present invention;

[0042] Figure 7 It is a schematic structural diagram of yet another light-emitting panel provided by an embodiment of the present invention;

[0043] Figure 8 It is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention;

[0044] Figure 9 It is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention;

[0045] Figure 10 It is a schematic structural diagram of a light-emitting device provided by an embodiment of the present invention. Detailed implementation manners

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0047] Based on the above technical problems, the following solutions are proposed in this embodiment:

[0048] Figure 1 It is a schematic structural diagram of a light-emitting panel provided by an embodiment of the present invention. Refer to Figure 1 , the light-emitting panel 100 provided by the embodiment of the present invention includes a light-emitting layer 1 for emitting light; at least one temperature adjustment layer 2 disposed on at least one side of the light-emitting layer 1 for adjusting the temperature of the light-emitting layer 1; when the temperature of the light-emitting panel 100 is greater than or equal to a preset phase change temperature, the temperature adjustment layer 2 is used to convert from a first phase change state to a second phase change state; wherein, the infrared emissivity of the temperature adjustment layer 2 in the second phase change state is greater than that of the temperature adjustment layer 2 in the first phase change state.

[0049] Specifically, the light-emitting layer 1 includes an organic light-emitting layer 12, and the organic light-emitting layer 12 includes light-emitting units arranged in an array. The light-emitting layer 1 can emit light. When the light-emitting panel 100 displays a large-power picture, or when the light-emitting panel 100 is a large-size light-emitting panel 100, the light-emitting panel 100 is likely to generate a large amount of heat. If the large amount of heat is not dissipated in time, it is likely to cause the temperature of the light-emitting layer 1 to be relatively high, affecting the service life of the light-emitting devices in the light-emitting layer 1.

[0050] The preset phase change temperature can be reasonably set according to the heat dissipation requirements such as the size of the light-emitting panel 100, for example, it can be 23 °C, 25 °C, etc. The higher the infrared emissivity of the temperature adjustment layer 2, the stronger the heat dissipation ability, and the lower the infrared emissivity of the temperature adjustment layer 2, the weaker the heat dissipation ability.

[0051] Since the infrared emissivity of the temperature regulation layer 2 in the second phase change state is greater than that of the temperature regulation layer 2 in the first phase change state, it is set that when the temperature of the light-emitting panel 100 is greater than or equal to the preset phase change temperature, the temperature regulation layer 2 is converted from the first phase change state with a lower infrared emissivity to the second phase change state with a higher infrared emissivity. The temperature regulation layer 2 in the second phase change state with a higher infrared emissivity can quickly dissipate the heat of the light-emitting layer 1 from the infrared heat dissipation channel, realizing rapid heat dissipation of the light-emitting layer 1.

[0052] When the temperature of the light-emitting panel 100 is less than the preset phase change temperature, the temperature regulation layer 2 is converted from the second phase change state with a higher infrared emissivity to the first phase change state with a lower infrared emissivity. The temperature regulation layer 2 in the first phase change state with a lower infrared emissivity can close the infrared heat dissipation channel, retain the heat of the light-emitting layer 1, and prevent the temperature of the light-emitting layer 1 from being too low.

[0053] The phase change state of the temperature regulation layer 2 of the light-emitting panel 100 provided by the embodiment of the present invention can be switched between the first phase change state and the second phase change state. The temperature regulation layer 2 is arranged on one side of the light-emitting layer 1, so that the temperature regulation layer 2 can regulate the temperature of the light-emitting layer 1. This setting improves the heat dissipation ability of the light-emitting panel 100, improves the service life of the light-emitting panel 100, and solves the problem that the weak heat dissipation ability of the light-emitting panel 100 affects the service life of the light-emitting device.

[0054] Optionally, on the basis of the above embodiment, continue to refer to Figure 1 , the temperature regulation layer 2 provided in this embodiment includes a vanadium dioxide superstructure material; the preset phase change temperature is adjusted by doping tungsten in the temperature regulation layer 2. Preferably, the preset phase change temperature is room temperature.

[0055] Specifically, the light-emitting layer 1 of the light-emitting panel 100 includes an electrode layer, and the electrode layer may include a thin-layer metal electrode. A vanadium dioxide superstructure material can be prepared on the thin-layer metal electrode, and impurities such as tungsten are doped into the temperature regulation layer 2 to adjust the phase change temperature of the temperature regulation layer 2 to the preset phase change temperature required during normal operation. The preset phase change temperature can be room temperature, such as temperature values of 20 °C, 23 °C, 25 °C, 28 °C, etc.

[0056] Optionally, on the basis of the above embodiment, continue to refer to Figure 1 , the second phase change state of the temperature regulation layer 2 of the light-emitting panel 100 provided in this embodiment includes a metallic state, and the infrared emissivity of the temperature regulation layer 2 in the metallic state is higher than 90%, so as to reduce the temperature of the light-emitting panel 100 by means of radiative heat dissipation; the first phase change state includes an insulating state, and the infrared emissivity of the temperature regulation layer 2 in the insulating state is lower than 20%, so as to close the infrared radiative heat dissipation channel.

[0057] Specifically, since the temperature regulation layer 2 made of vanadium dioxide superstructure material is in a metallic state at high temperatures and becomes an insulating state when the temperature drops below the preset phase transition temperature, the phase transition process of the temperature regulation layer 2 is fast and reversible. When the temperature of the light-emitting panel 100 is relatively high, for example, higher than the preset phase transition temperature, the temperature regulation layer 2 is in a metallic state, and the infrared emissivity of the metallic temperature regulation layer 2 is higher than 90%. The temperature of the light-emitting panel 100 is reduced by means of radiative heat dissipation.

[0058] When the temperature drops below the preset phase transition temperature, the temperature regulation layer 2 is in an insulating state. The infrared emissivity of the temperature regulation layer 2 drops below 20%, closing the infrared radiative heat dissipation channel, causing the temperature inside the light-emitting panel 100 to drop more slowly, achieving the effect of keeping the light-emitting panel 100 warm, so that the boost in voltage of the light-emitting devices in the light-emitting layer 1 at low temperatures is not very serious, thereby improving the light-emitting effect of the light-emitting panel 100.

[0059] Optionally, Figure 2 is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention. Figure 3 is a schematic structural diagram of yet another light-emitting panel provided by an embodiment of the present invention. Figure 4 is a schematic structural diagram of yet another light-emitting panel provided by an embodiment of the present invention. On the basis of the above embodiments, in combination with Figures 2 to 4 The light-emitting layer 1 provided by an embodiment of the present invention includes: a first electrode layer 11, an organic light-emitting layer 12, and a second electrode layer 13 that are sequentially stacked; the temperature regulation layer 2 is disposed on a side of the first electrode layer 11 away from the organic light-emitting layer 12, and the temperature regulation layer 2 is further configured to supplement the conductivity of the first electrode layer 11 when in a metallic state; and / or, the temperature regulation layer 2 is disposed on a side of the second electrode layer 13 away from the organic light-emitting layer 12, and the temperature regulation layer 2 is further configured to supplement the conductivity of the second electrode layer 13 when in a metallic state.

[0060] Specifically, the light-emitting layer 1 includes a first electrode layer 11, an organic light-emitting layer 12, and a second electrode layer 13 that are sequentially stacked. When the light-emitting panel 100 is a top-emitting device, the temperature regulation layer 2 can be disposed on a side of the first electrode layer 11 away from the organic light-emitting layer 12. The temperature regulation layer 2 can not only regulate the temperature of the light-emitting layer 1 but also supplement the conductivity of the first electrode layer 11 when the temperature regulation layer 2 is in a metallic state. Since the first electrode layer 11 of the light-emitting panel 100 is generally made relatively thin, by setting the temperature regulation layer 2 such that when the temperature of the light-emitting panel 100 is greater than or equal to the preset phase transition threshold, the temperature regulation layer 2 is in a metallic state, the temperature regulation layer 2 can serve as a conductive layer to supplement the conductivity of the first electrode layer 11, increase the cross-sectional area of the first electrode layer 11, reduce the impedance of the first electrode layer 11, improve the transmission ability of the driving signal of the light-emitting layer 1, and thereby improve the light-emitting effect of the light-emitting panel 100.

[0061] When the light-emitting panel 100 is a bottom-emitting device, the temperature adjustment layer 2 is disposed on the side of the second electrode layer 13 away from the organic light-emitting layer 12. The temperature adjustment layer 2 can not only adjust the temperature of the light-emitting layer 1, but also supplement the conductivity of the second electrode layer 13 when the temperature adjustment layer 2 is in a metallic state. Since the second electrode layer 13 of the light-emitting panel 100 is made thinner, by setting the temperature adjustment layer 2, when the temperature of the light-emitting panel 100 is greater than or equal to the preset phase change threshold, the temperature adjustment layer 2 is in a metallic state. The temperature adjustment layer 2 can serve as a conductive layer to supplement the conductivity of the second electrode layer 13, increase the cross-sectional area of the second electrode layer 13, reduce the impedance of the second electrode layer 13, improve the transmission ability of the driving signal of the light-emitting layer 1, and thus improve the light-emitting effect of the light-emitting panel 100.

[0062] Two temperature adjustment layers 2 can be provided on the light-emitting panel 100. One temperature adjustment layer 2 is disposed on the side of the second electrode layer 13 away from the organic light-emitting layer 12, and the other temperature adjustment layer 2 can be disposed on the side of the first electrode layer 11 away from the organic light-emitting layer 12. The temperature adjustment layer 2 located on the light-emitting side of the light-emitting panel can be a patterned structure. Such a setting enables the temperature adjustment layer 2 to rapidly dissipate heat from the light-emitting layer 1 when the temperature adjustment layer 2 is in a metallic state, improving the heat dissipation ability of the temperature adjustment layer 2. On the other hand, the temperature adjustment layer 2 can supplement the conductivity of the first electrode and the second electrode layer 13, further improving the light-emitting effect of the light-emitting panel 100.

[0063] Optionally, Figure 5 is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention. On the basis of the above embodiment, referring to Figure 5 , the light-emitting panel 100 provided by an embodiment of the present invention may further include: a substrate 3, and the light-emitting layer 1 is disposed on one side of the substrate 3; the temperature adjustment layer 2 is disposed on the side of the substrate 3 away from the light-emitting layer 1.

[0064] Specifically, the temperature adjustment layer 2 can be disposed on one side of the substrate 3, and the temperature adjustment layer 2 dissipates heat from the light-emitting layer 1 of the light-emitting panel 100 through the substrate 3. Such a setting can make the outside of the light-emitting panel 100 include the temperature adjustment layer 2, facilitating the conduction of heat to the air and further improving the heat dissipation ability of the light-emitting panel 100.

[0065] Optionally, Figure 6 is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention. On the basis of the above embodiment, referring to Figure 6 , the light-emitting panel 100 provided by an embodiment of the present invention may include a packaging layer 4, the packaging layer 4 is disposed on the side of the light-emitting layer 1 away from the substrate 3; the temperature adjustment layer 2 is disposed on the side of the packaging layer 4 away from the light-emitting layer 1.

[0066] Specifically, the encapsulation layer 4 is used to block water and oxygen, thereby enhancing the lifespan of the light-emitting panel 100. By disposing the temperature regulation layer 2 on the side of the encapsulation layer 4 away from the light-emitting layer 1, the temperature regulation layer 2 can dissipate heat from the surface of the side of the encapsulation layer 4 away from the light-emitting layer 1, facilitating the rapid dissipation of the heat of the light-emitting panel 100 into the air on the side of the encapsulation layer 4 away from the light-emitting layer 1. This further improves the heat dissipation path of the light-emitting panel 100 and enhances the lifespan of the light-emitting panel 100.

[0067] Optionally, Figure 7 is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention. Based on the above embodiment, referring to Figure 7 , the encapsulation layer 4 provided by the embodiment of the present invention includes: at least one first encapsulation layer 41 and at least one second encapsulation layer 42 that are stacked; the first encapsulation layer 41 and the second encapsulation layer 42 are provided in one-to-one correspondence; the temperature regulation layer 2 is disposed between the adjacent first encapsulation layer 41 and second encapsulation layer 42.

[0068] Specifically, the temperature regulation layer 2 can be disposed between the adjacent first encapsulation layer 41 and second encapsulation layer 42, facilitating the rapid dissipation of the heat generated by the light-emitting layer 1, preventing the temperature of the encapsulation layer 4 from rising to an excessive temperature, and enabling the encapsulation layer 4 to operate within a suitable temperature range. Such an arrangement can effectively dissipate heat from the light-emitting panel 100. Optionally, the first encapsulation layer 41 can be an inorganic material, and the second encapsulation layer 42 can be an organic material. Disposing the temperature regulation layer 2 between the first encapsulation layer 41 and the second encapsulation layer 42 can also effectively prevent the aging of the encapsulation layer 4 caused by overheating, thereby enhancing the lifespan of the encapsulation layer 4 and further improving the service life of the light-emitting panel 100.

[0069] Optionally, Figure 8 is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention. Combining Figure 4 and Figure 8 , based on the above embodiment, the temperature regulation layer 2 provided in this embodiment can include: a first temperature regulation layer 21 and a second temperature regulation layer 22; continuing to refer to Figure 4 , the first temperature regulation layer 21 and the second temperature regulation layer 22 are disposed on both sides of the light-emitting layer 1, or, referring to Figure 8 , both the first temperature regulation layer 21 and the second temperature regulation layer 22 are disposed on the encapsulation layer 4;; the first temperature regulation layer 21 and the second temperature regulation layer 22 are used for radiative heat dissipation and / or convective heat dissipation; wherein, the temperature regulation layer located on the light-emitting side of the light-emitting panel can be a patterned structure.

[0070] Specifically, by setting the light-emitting panel 100 to include a first temperature regulation layer 21 and a second temperature regulation layer 22, the first temperature regulation layer 21 can be set for radiative heat dissipation, and the second temperature regulation layer 22 can be set for convective heat dissipation. Refer to Figure 8 , the second temperature regulation layer 22 can be set to be in contact with the external environment. When the ambient temperature is between 25°C and 85°C, convective heat dissipation dominates. When the ambient temperature is too high, for example, when the ambient temperature is higher than 85°C, the convective heat dissipation capacity decreases, and radiative heat dissipation will play a dominant role. Such a setting enables the light-emitting panel 100 to dissipate heat more efficiently through the temperature regulation layer 2 in different temperature environments.

[0071] It should be noted that when the temperature regulation layer 2 is disposed on the light-emitting side of the light-emitting panel, the temperature regulation layer 2 can be set to be a patterned structure.

[0072] Optionally, Figure 9 is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 9 , the light-emitting panel 100 provided by an embodiment of the present invention may further include: a side surface in the thickness direction of the light-emitting panel 100; the temperature regulation layer 2 includes a third temperature regulation layer 23, and the third temperature regulation layer 23 completely covers the side surface of the light-emitting panel 100.

[0073] Specifically, the third temperature regulation layer 23 is used to regulate the temperature of the side surface of the light-emitting panel 100. By completely covering the side surface of the light-emitting panel 100 with the third temperature regulation layer 23, the first temperature regulation layer 21 is disposed on the side of the encapsulation layer 4 away from the light-emitting layer 1, and the second temperature regulation layer 22 is disposed on the side of the substrate 3 away from the light-emitting layer 1, wherein the first temperature regulation layer 21 and / or the second temperature regulation layer 22 can be a patterned structure. In this way, the light-emitting panel 100 is completely covered by the temperature regulation layer 2, which can not only ensure that the light of the light-emitting panel 100 can be emitted, but also improve the heat dissipation efficiency of the light-emitting panel 100. Such a setting enables the temperature regulation layer 2 to be converted from a first phase change state with a lower infrared emissivity to a second phase change state with a higher infrared emissivity when the temperature of the light-emitting panel 100 is greater than or equal to a preset phase change temperature. The temperature regulation layer 2 in the second phase change state with a higher infrared emissivity can quickly dissipate the heat of the light-emitting layer 1 in all directions of the light-emitting panel 100 through the infrared heat dissipation channel, further improving the heat dissipation efficiency of the light-emitting panel 100.

[0074] When the temperature of the light-emitting panel 100 is lower than the preset phase change temperature, the temperature adjustment layer 2 is converted from the second phase change state with a higher infrared emissivity to the first phase change state with a lower infrared emissivity. The temperature adjustment layer 2 in the first phase change state with a lower infrared emissivity can close the infrared heat dissipation channels in all directions where the light-emitting panel 100 contacts the environment, better maintain the heat of the light-emitting panel 100, and avoid the temperature of the light-emitting layer 1 from being too low, thereby improving the light-emitting effect of the light-emitting panel 100.

[0075] Figure 10 It is a schematic structural diagram of a light-emitting device provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 10 , the light-emitting device 200 provided by an embodiment of the present invention includes the light-emitting panel 100 proposed in any of the above embodiments, and has the beneficial effects of the light-emitting panel 100 proposed in any of the above embodiments, which will not be elaborated here.

[0076] Note that the above is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A light-emitting panel, characterized in that, Comprising: A light-emitting layer for emitting light. The light-emitting layer includes: a first electrode layer, an organic light-emitting layer, and a second electrode layer that are sequentially stacked. At least one temperature adjustment layer disposed on at least one side of the light-emitting layer for adjusting the temperature of the light-emitting layer; the temperature adjustment layer is disposed on the side of the first electrode layer away from the organic light-emitting layer, and / or the temperature adjustment layer is disposed on the side of the second electrode layer away from the organic light-emitting layer. When the temperature of the light-emitting panel is greater than or equal to a preset phase change temperature, the temperature adjustment layer is configured to convert from a first phase change state to a second phase change state; wherein, the infrared emissivity of the temperature adjustment layer in the second phase change state is greater than that of the temperature adjustment layer in the first phase change state. The first phase change state includes an insulating state, and the second phase change state includes a metallic state.

2. The light-emitting panel according to claim 1, characterized in that, The temperature adjustment layer includes a vanadium dioxide superstructure material. The preset phase change temperature is adjusted by doping tungsten in the temperature adjustment layer.

3. The light-emitting panel according to claim 1, wherein The preset phase change temperature is room temperature.

4. The light-emitting panel according to claim 1, wherein The infrared emissivity of the temperature adjustment layer in the metallic state is higher than 90% to reduce the temperature of the light-emitting panel by radiative heat dissipation. The infrared emissivity of the temperature adjustment layer in the insulating state is lower than 20% to close the infrared radiative heat dissipation channel.

5. The light-emitting panel according to claim 4, wherein The temperature adjustment layer is further configured to supplement the conductivity of the first electrode layer when in the metallic state; and / or The temperature adjustment layer is further configured to supplement the conductivity of the second electrode layer when in the metallic state.

6. The light-emitting panel according to claim 1, wherein The light-emitting panel further includes: A substrate, and the light-emitting layer is disposed on one side of the substrate. The temperature adjustment layer is disposed on the side of the substrate away from the light-emitting layer.

7. The light-emitting panel according to claim 6, wherein The light-emitting panel further includes: A packaging layer disposed on the side of the light-emitting layer away from the substrate. The temperature adjustment layer is disposed on the side of the packaging layer away from the light-emitting layer.

8. The light-emitting panel according to claim 7, characterized in that, The packaging layer includes: At least one first packaging layer and at least one second packaging layer that are stacked; the first packaging layer and the second packaging layer are arranged in one-to-one correspondence. The temperature adjustment layer is disposed between the adjacent first packaging layer and the second packaging layer.

9. The light-emitting panel according to claim 7, wherein The temperature adjustment layer includes: A first temperature adjustment layer and a second temperature adjustment layer; the first temperature adjustment layer and the second temperature adjustment layer are disposed on both sides of the light-emitting layer, or the first temperature adjustment layer and the second temperature adjustment layer are both disposed on the packaging layer. The first temperature adjustment layer and the second temperature adjustment layer are configured for radiative heat dissipation and / or convective heat dissipation. Wherein, the temperature adjustment layer on the light-emitting side of the light-emitting panel can be a patterned structure.

10. The light-emitting panel according to claim 1, characterized in that, The light-emitting panel further includes: A side surface in the thickness direction of the light-emitting panel. The temperature adjustment layer includes a third temperature adjustment layer that completely covers the side surface of the light-emitting panel.

11. A light-emitting device, characterized in that, Comprising: The light-emitting panel according to any one of claims 1 to 10.

Images