A light-emitting panel and a light-emitting device

Abstract

The present invention discloses a light-emitting panel and a light-emitting device. The light-emitting panel includes: a substrate; a light-emitting device layer located on the surface of the substrate; a color shift improvement layer located on the side where the light of the light-emitting device layer exits. The color shift improvement layer can deform under the action of external conditions to form a wrinkled surface, and the color shift improvement layer is used to scatter the light emitted by the light-emitting device layer. Among them, the external conditions include at least one of a temperature field, an electric field, and a magnetic field. The technical solution provided by the embodiments of the present invention improves the color shift problem of the light-emitting panel, simplifies the manufacturing process, and reduces the manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor technology, and particularly to a light-emitting panel and a light-emitting device. Background Art

[0002] In an organic light-emitting (OLED) panel, in order to improve its front brightness, in a top-emitting device, in order to improve the light extraction efficiency, a reflective electrode is added to the anode to increase the light reflectivity of the non-light-emitting surface. Utilizing the effect of enhanced light interference to improve the front brightness. However, due to the light interference of the microcavity device of the organic light-emitting panel, while increasing the front brightness, it will also have a selective and narrowing effect on the light. The light is sensitive to the optical path. As the observation angle deviates from the direction perpendicular to the light-emitting surface, the light color will change, that is, the emission peak position will shift, resulting in viewing color shift. Moreover, for a conventional screen body, as the device thickness increases, the greater the change in the optical path affected by the change in the viewing angle, the greater the color shift will be, which will cause color distortion for display or is not conducive to wide-angle display, and there is also a risk of signal confusion in lighting.

[0003] Currently, common solutions for improving color shift include adding a scattering coating on the light-emitting surface or using a lens, etc., which are difficult to prepare and have complex processes. Summary of the Invention

[0004] The present invention provides a light-emitting panel and a light-emitting device to improve the color shift problem of the light-emitting panel, simplify the preparation process, and reduce the preparation cost.

[0005] According to an aspect of the present invention, there is provided a light-emitting panel, including:

[0006] A substrate;

[0007] A light-emitting device layer, the light-emitting device layer being located on the surface of the substrate;

[0008] A color shift improvement layer, the color shift improvement layer being located on the side where the light of the light-emitting device layer exits. The color shift improvement layer can be deformed under the action of external conditions, and the color shift improvement layer is used to scatter the light emitted by the light-emitting device layer, wherein the external conditions include at least one of a temperature field, an electric field, and a magnetic field.

[0009] Optionally, the color shift improvement layer includes a material layer that can aggregate under a temperature field. The material layer that can aggregate under a temperature field can at least partially aggregate under the action of the temperature field to form a wrinkled surface, wherein the temperature field is a single temperature or an alternately and cyclically changing temperature.

[0010] Optionally, the color shift improvement layer includes a metal layer that can aggregate under a temperature field.

[0011] Optionally, the color shift improvement layer includes an electrostrictive material layer, and the size of the electrostrictive material layer elongates or contracts in the electric field direction to form a wrinkled surface.

[0012] Optionally, the color shift improvement layer includes a magnetostrictive material layer, and the size of the magnetostrictive material layer elongates or contracts in the magnetization direction to form a wrinkled surface.

[0013] Optionally, the thickness of the color shift improvement layer is greater than or equal to 1 nm and less than or equal to 100 nm.

[0014] Optionally, a stress release layer is further included, and the stress release layer is located between the light-emitting device layer and the color shift improvement layer, and / or the stress release layer is located on the surface of the color shift improvement layer facing away from the light-emitting device layer;

[0015] The hardness of the stress release layer decreases within a preset temperature, and the stress release layer can deform following the undulation of the surface of the color shift improvement layer to release the stress from the color shift improvement layer.

[0016] Optionally, the thickness of the stress release layer is N times the thickness of the color shift improvement layer, where N is greater than or equal to 5 and less than or equal to 15.

[0017] Optionally, the thickness of the stress release layer satisfies the following relationship:

[0018] d = λ / 2n

[0019] where d is the thickness of the stress release layer, λ is the wavelength of the light emitted by the light-emitting device layer, and n is the refractive index of the stress release layer.

[0020] Optionally, the refractive index of the stress release layer is greater than or equal to 1.7.

[0021] Optionally, the stress release layer includes an organic stress release layer, and the preset temperature is greater than or equal to 60 °C and less than or equal to 150 °C.

[0022] According to another aspect of the present invention, a light-emitting device is provided, including the light-emitting panel according to any embodiment of the present invention.

[0023] In the technical solution provided by this embodiment, after the light-emitting device layer and the color shift improvement layer are sequentially formed on the substrate surface, the color shift improvement layer can be deformed under the action of at least one external condition among a temperature field, an electric field, and a magnetic field to form a wrinkled surface. The color shift improvement layer with the wrinkled surface can scatter the emitted light of the light-emitting device layer, change the emission angle of the emitted light, thereby improving the viewing angle color shift of the light-emitting panel; at the same time, it can also play a role in light extraction and improve the efficiency of the light-emitting panel. And the condition for enabling the color shift improvement layer to have a good scattering function is at least one of a temperature field, an electric field, and a magnetic field. There is no need to add a scattering coating on the light-emitting surface of the light-emitting panel or use a lens and other solutions, which simplifies the manufacturing process of the light-emitting panel and reduces the manufacturing cost.

[0024] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. 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 be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of a light-emitting panel provided by an embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of another light-emitting panel provided by an embodiment of the present invention;

[0028] Figure 3 is a schematic structural diagram of yet another light-emitting panel provided by an embodiment of the present invention;

[0029] Figure 4 is a schematic structural diagram of a first stress release layer, a color shift improvement layer, and a second stress release layer provided by an embodiment of the present invention;

[0030] Figure 5 is a schematic structural diagram of a light-emitting device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] In order to improve the color shift problem of the light-emitting panel, simplify the manufacturing process of the light-emitting panel, and reduce the manufacturing cost, the embodiments of the present invention provide the following technical solutions:

[0034] Figure 1 is a schematic structural diagram of a light-emitting panel provided according to an embodiment of the present invention. Refer to Figure 1 , the light-emitting panel includes: a substrate 100; a light-emitting device layer 200, the light-emitting device layer 200 is located on the surface of the substrate 100; a color shift improvement layer 300, the color shift improvement layer 300 is located on the side where the light of the light-emitting device layer 200 exits, and the color shift improvement layer 300 can be deformed under the action of external conditions to form a wrinkled surface, and the color shift improvement layer 300 is used to scatter the light emitted by the light-emitting device layer 200, wherein the external conditions include at least one of a temperature field, an electric field, and a magnetic field.

[0035] Specifically, the substrate 100 includes a substrate and a driving circuit for providing a driving signal to the anode of the light-emitting device layer 200. The light-emitting device layer 200 sequentially includes an anode, an organic light-emitting layer, and a cathode. Exemplarily, when the light-emitting panel emits light, under a certain voltage drive, electrons and holes are respectively injected from the cathode and the anode into the organic light-emitting layer, meet, form excitons and excite the light-emitting molecules, and then emit visible light through radiative recombination.

[0036] Exemplarily, the light-emitting device layer 200 and the color shift improvement layer 300 can be sequentially formed on the surface of the substrate 100 by a vapor deposition process.

[0037] After the light-emitting device layer 200 and the color deviation improvement layer 300 are sequentially formed on the surface of the substrate 100 in this embodiment, the color deviation improvement layer 300 can be deformed to form a wrinkled surface under at least one of the external conditions of a temperature field, an electric field, and a magnetic field. The color deviation improvement layer 300 with the wrinkled surface can scatter the emitted light of the light-emitting device layer 200, change the emission angle of the emitted light, thereby improving the viewing angle color deviation of the light-emitting panel. And the condition for the color deviation improvement layer 300 to have a good scattering function is at least one of a temperature field, an electric field, and a magnetic field. There is no need to add a scattering coating on the light-emitting surface of the light-emitting panel or use a lens and other solutions, which simplifies the manufacturing process of the light-emitting panel and reduces the manufacturing cost.

[0038] Optionally, the color deviation improvement layer 300 includes a material layer that can aggregate under a temperature field. The material layer that can aggregate under a temperature field can at least partially aggregate under the action of the temperature field to form a wrinkled surface, wherein the temperature field is a single temperature or a temperature that alternates and cycles. Specifically, the temperature field includes a temperature field formed by alternating cycles of a first temperature and a second temperature, and the first temperature is higher than the second temperature; and / or, the temperature of the temperature field includes a third temperature. A single temperature stress will cause grain boundary slip and grain growth in the thin film under the action of the temperature field, resulting in changes in the film layer morphology and causing changes in optical properties. The action of temperature cycle stress causes rapid changes in the Joule heat effect of the film layer, accelerates the fatigue stress of the film layer, causes the formation and expansion of microcracks, forms mounds and vacancies, changes the surface morphology of the film layer, and causes changes in optical properties.

[0039] Exemplarily, the first temperature is about 80 °C, and the second temperature is about -20 °C. The value of the third temperature is within a preset threshold. When the temperature of the temperature field only includes the third temperature, the temperature field is a temperature field composed of a single temperature.

[0040] Specifically, the material layer that can aggregate under a temperature field can at least partially aggregate under the action of the temperature field to form a wrinkled surface, which can scatter the emitted light of the light-emitting device layer 200, change the emission angle of the emitted light, thereby improving the viewing angle color deviation of the light-emitting panel. Different material thicknesses, different temperatures and times will affect the specific microscopic morphology of the material layer that can aggregate under a temperature field, and further can adjust the scattering rate of the color deviation improvement layer 300.

[0041] Optionally, the material layer that can aggregate under a temperature field includes a metal layer that can aggregate under a temperature field.

[0042] Specifically, the metal layer that can aggregate under a temperature field, such as a silver metal layer, can at least partially aggregate into an island shape under the action of high temperature, and then form a wrinkled surface. The metal layer that can aggregate under a temperature field, such as an aluminum metal layer, can at least partially aggregate into a mound shape under the action of high temperature, and then form a wrinkled surface. The metal layer that can aggregate under a temperature field with a wrinkled surface can scatter the emitted light of the light-emitting device layer 200, change the emission angle of the emitted light, and thus improve the viewing angle color shift of the light-emitting panel.

[0043] Optionally, the color shift improvement layer 300 includes an electrostrictive material layer, and the size of the electrostrictive material layer will elongate or shorten in the electric field direction and then form a wrinkled surface.

[0044] Specifically, the electrostrictive material layer is, for example, a ferroelectric. Ferroelectrics such as barium titanate, etc., whose size will elongate or shorten in the electric field direction and then form a wrinkled surface, can scatter the emitted light of the light-emitting device layer 200, change the emission angle of the emitted light, and thus improve the viewing angle color shift of the light-emitting panel. Different material thicknesses, different electric fields, and time will affect the specific microscopic morphology of the electrostrictive material layer, and further, the scattering rate of the color shift improvement layer 300 can also be adjusted.

[0045] Optionally, the color shift improvement layer 300 includes a magnetostrictive material layer, and the size of the magnetostrictive material layer will elongate or shorten in the magnetization direction and then form a wrinkled surface.

[0046] Specifically, the magnetostrictive material layer can be selected from metal alloys or ferrites. Metal alloys such as nickel-based alloys, iron-based alloys, etc. Their size will elongate or shorten in the magnetization direction and then form a wrinkled surface, which can scatter the emitted light of the light-emitting device layer 200, change the emission angle of the emitted light, and thus improve the viewing angle color shift of the light-emitting panel. Different material thicknesses, different magnetic fields, and time will affect the specific microscopic morphology of the magnetostrictive material layer, and further, the scattering rate of the color shift improvement layer 300 can also be adjusted.

[0047] Optionally, the thickness of the color shift improvement layer 300 is greater than or equal to 1 nm and less than or equal to 100 nm.

[0048] Specifically, the thickness of the color shift improvement layer 300 is at the nanoscale, and the activity of the surface atoms is relatively high, which is likely to cause changes in the surface atom transport and composition of the nanoparticles. As a result, at least part of the thin metal color shift improvement layer 300 can aggregate under the action of the temperature field and then form a wrinkled surface, which can scatter the emitted light of the light-emitting device layer 200, change the emission angle of the emitted light, and thus improve the viewing angle color shift of the light-emitting panel.

[0049] Optionally, it further includes a stress release layer. The stress release layer is located between the light-emitting device layer and the color deviation improvement layer, and / or the stress release layer is located on the surface of the color deviation improvement layer facing away from the light-emitting device layer. The hardness of the stress release layer decreases within a preset temperature, and it can deform following the undulations of the surface of the color deviation improvement layer, for releasing the stress from the color deviation improvement layer.

[0050] Figure 2 It is a schematic structural diagram of another light-emitting panel provided according to an embodiment of the present invention. Figure 3 It is a schematic structural diagram of yet another light-emitting panel provided according to an embodiment of the present invention. Exemplarily, refer to Figure 2 and Figure 3 In this light-emitting panel, the stress release layer 400 is disposed between the light-emitting device layer 200 and the color deviation improvement layer 300, and on the surface of the color deviation improvement layer 300 facing away from the light-emitting device layer 200. The stress release layer 400 includes a first stress release layer 401 and a second stress release layer 402. The first stress release layer 401 is located between the light-emitting device layer 200 and the color deviation improvement layer 300, and the second stress release layer 402 is located on the surface of the color deviation improvement layer 300 facing away from the light-emitting device layer 20. The hardness of the first stress release layer 401 and the second stress release layer 402 decreases within a preset temperature, and they have a certain flexibility and can deform following the undulations of the surface of the color deviation improvement layer 300, for releasing the stress from the color deviation improvement layer 300.

[0051] Optionally, refer to Figure 3 In this light-emitting panel, it further includes a touch control substrate 500 and a packaging layer 600. The provision of the touch control substrate 500 realizes a light-emitting panel with a touch function, and the provision of the packaging layer 600 is used to block the intrusion of moisture by each film layer of the light-emitting panel. Among them, refer to Figure 2 and Figure 3 The first stress release layer 401 can prevent the stress of the color deviation improvement layer 300 from damaging the light-emitting device layer 200. Refer to Figure 3 The second stress release layer 402 can prevent damage to the packaging layer 600 of the light-emitting panel.

[0052] Figure 4 It is a schematic structural diagram of a first stress release layer, a color deviation improvement layer, and a second stress release layer provided according to an embodiment of the present invention. Exemplarily, refer to Figure 4 The color deviation improvement layer 300 can deform to form a wrinkled surface under at least one of external conditions such as a temperature field, an electric field, and a magnetic field. Under the temperature field, a metal layer that can aggregate, such as a metal silver layer, can at least partially aggregate into an island shape under the action of high temperature, and then form a wrinkled surface. Under the temperature field, a metal layer that can aggregate, such as a metal aluminum layer, can at least partially aggregate into a mound shape under the action of high temperature, and then form a wrinkled surface. Refer to Figure 4, the first stress release layer 401 and the second stress release layer 402 have a decreased hardness within a preset temperature, have a certain flexibility, and can deform following the undulations on the surface of the color shift improvement layer 300 to release the stress from the color shift improvement layer 300. Among them, the flatness of the surface of the first stress release layer 401 facing away from the color shift improvement layer 300 is very high, which can prevent the stress of the color shift improvement layer 300 from damaging the light-emitting device layer 200. Refer to Figure 3 , the flatness of the surface of the second stress release layer 402 facing away from the color shift improvement layer 300 is very high, which can prevent damage to the encapsulation layer 600 of the light-emitting panel.

[0053] Optionally, the thickness of the stress release layer 400 is N times the thickness of the color shift improvement layer 300, where N is greater than or equal to 5 and less than or equal to 15.

[0054] Specifically, the thickness of the stress release layer 400 is less than or equal to 5 times the thickness of the color shift improvement layer 300. If the stress release layer 400 is too thin, the stress from the color shift improvement layer 300 easily passes through the stress release layer 400 and further releases the stress in the light-emitting device layer 200 or the encapsulation film layer, thereby affecting the yield of the light-emitting panel. If the thickness of the stress release layer 400 is greater than or equal to 15 times the thickness of the color shift improvement layer 300, the overall thickness of the light-emitting panel will be too large. The thickness of the stress release layer 400 is N times the thickness of the color shift improvement layer 300, where N is greater than or equal to 5 and less than or equal to 15. On the one hand, it makes the surface of the stress release layer 400 adjacent to the color shift improvement layer 300 have a decreased hardness within a preset temperature, have a certain flexibility, and can deform following the undulations on the surface of the color shift improvement layer 300 to release the stress from the color shift improvement layer 300; on the other hand, the flatness of the surface of the stress release layer 400 facing away from the color shift improvement layer 300 is very high, which can prevent the stress of the color shift improvement layer 300 from damaging the light-emitting device layer 200 or the encapsulation layer 600.

[0055] Optionally, the thickness of the stress release layer 400 satisfies the following relationship:

[0056] d = λ / 2n (1)

[0057] where d is the thickness of the stress release layer, λ is the wavelength of the emitted light of the light-emitting device layer, and n is the refractive index of the stress release layer.

[0058] Specifically, the appropriate thickness of the stress release layer 400 can be selected according to the wavelength of the emitted light of the light-emitting device layer 200 and the refractive index of the stress release layer 400. Moreover, the thickness of the stress release layer 400 matches the wavelength of the light emitted by the light-emitting device layer 200, and this thickness will not cause an interference weakening effect on the light of the light-emitting device layer 200, resulting in a reduction in efficiency.

[0059] Optionally, the refractive index of the stress release layer 400 is greater than or equal to 1.7, which can be matched with the wavelength of the emitted light from the light-emitting device layer 200 and the thickness range of the stress release layer 400. The design of the refractive index can increase the light extraction effect by cooperating with the cathode of the light-emitting device layer 200 and the organic materials in the organic light-emitting layer.

[0060] Optionally, the stress release layer 400 includes an organic stress release layer, and the preset temperature is greater than or equal to 60 °C and less than or equal to 150 °C.

[0061] Specifically, the stress release layer 400 includes an organic stress release layer such as a small molecule material or a polymer material, which has a decreased hardness and a certain flexibility within a preset temperature range of greater than or equal to 60 °C and less than or equal to 150 °C, and can deform following the undulations on the surface of the color shift improvement layer 300 to release the stress from the color shift improvement layer 300. Among them, the first stress release layer 401 can prevent the stress of the color shift improvement layer 300 from damaging the light-emitting device layer 200. The second stress release layer 402 can prevent damage to the encapsulation layer of the light-emitting panel.

[0062] If the preset temperature is less than 60 °C, the temperature at which the hardness of the stress release layer 400 decreases and the flexibility increases is too low. After the stress release layer 400 has basically released the stress from the color shift improvement layer 300, it may continue to deform under the action of the ambient temperature, resulting in a shift in the position of the color shift improvement layer 300, thereby affecting the light emission angle of the color shift improvement layer 300 and the display effect of the light-emitting panel. If the preset temperature is greater than 150 °C, the temperature at which the hardness of the stress release layer 400 decreases and the flexibility increases is too high. When the stress release layer 400 can deform, the temperature is too high, which is likely to affect other film layers of the light-emitting panel.

[0063] It should be noted that the stress release layer 400 can decrease in hardness and have a certain flexibility within a short time at the preset temperature. However, the time for the color shift improvement layer 300 to deform to form a wrinkled surface under the action of at least one external condition such as a temperature field, an electric field, and a magnetic field is relatively long. Therefore, the influence of the temperature corresponding to the hardness decrease of the stress release layer 400 on the color shift improvement layer 300 can be ignored. Furthermore, in the embodiments of the present invention, the height of the temperature corresponding to the hardness decrease of the stress release layer 400 and the temperature at which the color shift improvement layer 300 deforms may not be limited.

[0064] Specifically, the sequence of the hardness decrease process of the stress release layer 400 and the deformation process of the color shift improvement layer 300 may include the following two cases:

[0065] In the first case, after the color deviation improvement layer 300 is deformed, the temperature is raised to the preset temperature of the stress release layer 400. The surface of the stress release layer 400 adjacent to the color deviation improvement layer 300 has a reduced hardness within the preset temperature and has a certain flexibility, and can deform following the undulations of the surface of the color deviation improvement layer 300, so as to release the stress from the color deviation improvement layer 300, so as to achieve the slow stress release of the stress release layer 400 to adapt to the shape of the color deviation improvement layer 300.

[0066] In the second case, the temperature is first raised to the preset temperature of the stress release layer 400, so that the surface of the stress release layer 400 adjacent to the color deviation improvement layer 300 has a reduced hardness within the preset temperature and has a certain flexibility. Then, during the process that the color deviation improvement layer 300 is deformed to form a wrinkled surface under the action of at least one external condition among a temperature field, an electric field, and a magnetic field, the stress release layer 400 can deform following the undulations of the surface of the color deviation improvement layer 300, so as to release the stress from the color deviation improvement layer 300, so as to achieve the slow stress release of the stress release layer 400 to adapt to the shape of the color deviation improvement layer 300.

[0067] An embodiment of the present invention also provides a light-emitting device. Figure 5 It is a schematic structural diagram of a light-emitting device provided by an embodiment of the present invention. Refer to Figure 5 , the light-emitting device 01 includes the light-emitting panel 02 described in the above embodiment. Therefore, the light-emitting device provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, which will not be elaborated here. Exemplarily, the light-emitting device may be an electronic device such as a mobile phone, a computer, an optical medical device, or a wearable device. The specific form of the light-emitting device in the embodiment of the present invention is not limited.

[0068] The above specific implementation manners do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A light-emitting panel, characterized in that, Comprising: A substrate; A light-emitting device layer located on the surface of the substrate; A color shift improvement layer located on the light-emitting side of the light-emitting device layer. The color shift improvement layer can be deformed under the action of external conditions, and is used to scatter the emitted light of the light-emitting device layer, where the external conditions include at least one of a temperature field, an electric field, and a magnetic field; Wherein, a stress release layer is further included, and the stress release layer is located between the light-emitting device layer and the color shift improvement layer; The stress release layer has a reduced hardness within a preset temperature and can be deformed following the undulations on the surface of the color shift improvement layer, for releasing the stress from the color shift improvement layer.

2. The light-emitting panel according to claim 1, wherein The color shift improvement layer includes a material layer that can aggregate under a temperature field. The material layer that can aggregate under a temperature field can at least partially aggregate under the action of the temperature field to form a wrinkled surface, where the temperature field is a single temperature or an alternately cyclic temperature.

3. The light-emitting panel according to claim 2, characterized in that, The color shift improvement layer includes a metal layer that can aggregate under a temperature field.

4. The light-emitting panel according to claim 1, characterized in that, The color shift improvement layer includes an electrostrictive material layer, and the size of the electrostrictive material layer elongates or shortens in the electric field direction to form a wrinkled surface; or the color shift improvement layer includes a magnetostrictive material layer, and the size of the magnetostrictive material layer elongates or shortens in the magnetization direction to form a wrinkled surface.

5. The light-emitting panel according to any one of claims 1-4, characterized in that, The thickness of the color shift improvement layer is greater than or equal to 1 nm and less than or equal to 100 nm.

6. The light-emitting panel according to claim 1, characterized in that, The stress release layer is located on the surface of the color shift improvement layer facing away from the light-emitting device layer.

7. The light-emitting panel according to claim 6, characterized in that, The thickness of the stress release layer is N times the thickness of the color shift improvement layer, where N is greater than or equal to 5 and less than or equal to 15.

8. The light-emitting panel according to claim 6, characterized in that, The thickness of the stress release layer satisfies the following relationship: d = λ / 2n Where d is the thickness of the stress release layer, λ is the wavelength of the emitted light of the light-emitting device layer, and n is the refractive index of the stress release layer; the refractive index of the stress release layer is greater than or equal to 1.

7.

9. The light-emitting panel according to claim 6, wherein The stress release layer includes an organic stress release layer, and the preset temperature is greater than or equal to 60 °C and less than or equal to 150 °C.

10. A light-emitting device, characterized in that, Including the light-emitting panel according to any one of claims 1-9.

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