Display panel and display device

Abstract

The invention provides a display panel and a display device, the display panel comprises an array substrate and a plurality of light-emitting devices, the array substrate comprises a first connecting part, and the light-emitting devices comprise second connecting parts. The first connecting part is electrically connected with the second connecting part, and the plurality of light-emitting devices comprise a first light-emitting device and a second light-emitting device. The display panel further comprises a laser receiving layer, and the laser receiving layer is located on the side, close to the array substrate, of the second connecting part. The display panel further comprises a first area and a second area, the first light-emitting device is located in the first area, and the second light-emitting device is located in the second area. The heat transmitted to the first area by the laser receiving layer is greater than the heat transmitted to the second area. The heat transmitted to the first area by the laser receiving layer is larger than the heat transmitted to the second area, so that the effect of increasing the welding temperature of the first light-emitting device can be achieved, the increasing degree of the welding temperature of the second light-emitting device can also be weakened, and the phenomenon of overmelting of the welding structure is avoided.

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] The yield rate of the finished product of the display panel directly affects its display effect and reliability, and the quality of the welding effect between the light-emitting device and the display panel is an important factor affecting the yield rate of the finished product of the display panel. In the prior art, laser welding is usually used to achieve the bonding of the light-emitting device and the panel. However, due to the differences in the structure and materials of the light-emitting device, in the laser welding process, the welding layers corresponding to the light-emitting devices with different luminous colors are heated to different degrees, resulting in inconsistent welding effects between the light-emitting devices with different luminous colors and the panel, affecting the yield rate of the finished product of the display panel. Summary of the invention

[0003] In view of this, the present application provides a display panel and a display device to solve the problem of different bonding effects corresponding to the light emitting devices of different colors.

[0004] In a first aspect, an embodiment of the present application provides a display panel, including an array substrate and a plurality of light-emitting devices, wherein the array substrate includes a first connection portion, and the light-emitting devices include a second connection portion. The first connection portion is electrically connected to the second connection portion, and the plurality of light-emitting devices include a first light-emitting device and a second light-emitting device.

[0005] The display panel further includes a laser receiving layer, which is located on a side of the second connecting portion close to the array substrate.

[0006] The display panel further includes a first area and a second area, the first light emitting device is located in the first area, and the second light emitting device is located in the second area. The heat transmitted by the laser receiving layer to the first area is greater than the heat transmitted to the second area.

[0007] In a second aspect, an embodiment of the present application provides a display device, comprising a display panel provided in the first aspect.

[0008] In the embodiment of the present application, the heat transmitted by the laser receiving layer to the first area is greater than the heat transmitted to the second area, which can increase the welding temperature of the first light-emitting device. In addition, this setting method can also reduce the degree of increase in the welding temperature of the second light-emitting device, avoiding the phenomenon of over-melting of the welding structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in 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 paying creative labor.

[0010] Figure 1 is a cross-sectional schematic diagram of a partial structure of a display panel related to the present application;

[0011] Figure 2 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0012] Figure 3 for Figure 2 A schematic top view of a partial structure of a display panel is shown;

[0013] Figure 4 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0014] Figure 5 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0015] Figure 6 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0016] Figure 7 for Figure 6 A schematic projection diagram of a partial structure of a display panel shown;

[0017] Figure 8 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0018] Fig. 9 for Figure 8 A schematic projection diagram of a partial structure of a display panel shown;

[0019] Fig.10 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0020] Fig.11 for Fig.10 A schematic projection diagram of a partial structure of a display panel shown;

[0021] Fig.12 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0022] Fig.13 for Fig.12 A schematic projection diagram of a partial structure of a display panel shown;

[0023] Fig.14 A schematic diagram showing the change of the microstructure of a part of the constituent materials included in the laser receiving layer with the temperature;

[0024] Fig.15 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0025] Fig.16 for Fig.15 A schematic projection diagram of a partial structure of a display panel shown;

[0026] Fig.17 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0027] Fig.18 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0028] Fig.19 for Fig.18 A projection diagram of a partial structure of a display panel is shown;

[0029] Fig. 20 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0030] Fig.21 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0031] Fig. 22 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0032] Fig.23 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0033] Fig.24 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0034] Fig.25 for Fig.24 A schematic projection diagram of a partial structure of a display panel shown;

[0035] Fig.26 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0036] Fig. 27 for Fig.26 A projection diagram of a partial structure of a display panel is shown;

[0037] Fig.28 A schematic cross-sectional view of a partial structure of a display panel provided in the present application;

[0038] Fig.29 for Fig.28 A schematic projection diagram of a partial structure of a display panel shown;

[0039] Fig.30 A schematic diagram of a display device provided in the present application. DETAILED DESCRIPTION

[0040] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0041] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0042] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0043] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] Figure 1 It is a cross-sectional schematic diagram of a partial structure of a display panel related to the present application.

[0045] In the prior art, Figure 1 As shown, the light emitting device 01 is bonded to the array substrate 02 by laser welding technology, so that the light emitting device 01 is electrically connected to the bonding metal 02a on the array substrate 02. In the above welding process, the laser irradiates the light emitting body 01a of the light emitting device 01 and passes through the light emitting body 01a to irradiate the portion where the connecting electrode 01b below and the bonding metal 02a are in contact. At this time, the connecting electrode 01b and the bonding metal 02a are irradiated by the laser to generate heat, thereby causing the connecting electrode 01b and the bonding metal 02a to be in a molten state. After the connecting electrode 01b and the bonding metal 02a are cooled and solidified, the light emitting device 01 and the array substrate 02 achieve the effect of bonding and conduction.

[0046] Under common circumstances, the first light-emitting device 011 (which may be a blue / green light-emitting device) and the second light-emitting device 012 (which may be a red light-emitting device) have obvious differences in constituent materials, surface roughness, and internal reflective structures, resulting in different transmittances corresponding to lasers of equal power density when passing through the light-emitting body 01a of the first light-emitting device 011 and the light-emitting body 01a of the second light-emitting device 012, respectively, and thus causing different laser energies received by the connecting electrode 01b and the bonding metal 02a corresponding to the above two light-emitting devices 01. For example, compared with the blue / green light-emitting device, the transmittance corresponding to the light-emitting body of the red light-emitting device when the laser of equal power density passes through the red light-emitting device is higher, and the laser energy received by the welding structure corresponding to the red light-emitting device (including the above-mentioned connecting electrode 01b and bonding metal 02a) is stronger, which easily leads to over-melting of the welding structure corresponding to the red light-emitting device. Accordingly, the laser energy received by the welding structure corresponding to the blue / green light-emitting device is relatively weak, which easily leads to cold welding of the welding structure corresponding to the blue / green light-emitting device.

[0047] Figure 2 A schematic cross-sectional view of a partial structure of a display panel provided in the present application.

[0048] To solve the above problems, the present application provides a display panel 10, such as Figure 2 As shown, the display panel 10 includes an array substrate 11 and a plurality of light-emitting devices 12, the array substrate 11 includes a first connection portion 11a, the light-emitting device 12 includes a second connection portion 12a, and the first connection portion 11a is electrically connected to the second connection portion 12a. The light-emitting device 12 may include a light-emitting body 12b, and the light-emitting body 12b may be electrically connected to the array substrate 11 through the second connection portion 12a. The first connection portion 11a may be an output terminal of a driving circuit on the array substrate 11, and the driving circuit may be used to provide the light-emitting device 12 with an electrical signal required for emitting light; the first connection portion 11a may also be electrically connected to a portion of signal lines on the array substrate 11, and the portion of signal lines may provide the light-emitting device 12 with an electrical signal required for emitting light. In addition, the constituent material of the first connection portion 11a and the constituent material of the second connection portion 12a may both include metal tin.

[0049] The plurality of light emitting devices 12 include a first light emitting device 121 and a second light emitting device 122. The light emitting color of the first light emitting device 121 may be different from the light emitting color of the second light emitting device 122. For example, the light emitting color of the first light emitting device 121 may be green or blue, and the light emitting color of the second light emitting device 122 may be red.

[0050] The display panel 10 further includes a laser receiving layer 13, which is located on a side of the second connection portion 12a close to the array substrate 11. The laser receiving layer 13 has the characteristics of receiving laser light irradiated thereon and generating heat. When the light emitting device 12 is welded by laser, if part of the laser light is irradiated onto the laser receiving layer 13, the laser receiving layer 13 can receive the part of the laser light and generate heat, and the part of the heat can be transferred to the vicinity of the contact position between the first connection portion 11a and the second connection portion 12a, so that the ambient temperature corresponding to the welding part is further increased, thereby improving the degree of heating of the first connection portion 11a and the second connection portion 12a.

[0051] Figure 3 for Figure 2 A schematic top view of a partial structure of a display panel is shown.

[0052] Combination Figure 2 and Figure 3 , the display panel 10 further includes a first region S1 and a second region S2, the first light emitting device 121 is located in the first region S1, and the second light emitting device 122 is located in the second region S2. The laser receiving layer 13 may include a portion (first portion) located in the first region S1, and during the welding process, if part of the laser is irradiated to the first portion, the first portion may generate heat and the heat may be used to heat the first connecting portion 11a and the second connecting portion 12a corresponding to the first light emitting device 121. The laser receiving layer 13 may also include a portion (second portion) located in the second region S2, and during the welding process, if part of the laser is irradiated to the second portion, the second portion may generate heat and the heat may be used to heat the first connecting portion 11a and the second connecting portion 12a corresponding to the second light emitting device 122.

[0053] The amount of heat transferred by the laser receiving layer 13 to the first area S1 is greater than the amount of heat transferred to the second area S2 .

[0054] The light colors of the first light emitting device 121 and the second light emitting device 122 are different, which means that the transmittance corresponding to the light emitting body 12b of the first light emitting device 121 and the transmittance corresponding to the light emitting body 12b of the second light emitting device 122 of the same power density can be different. During the welding process, the heating effect of the laser irradiation with the same power density on the welding structure (including the first connecting part 11a and the second connecting part 12a) corresponding to the first light emitting device 121 and the welding structure (including the first connecting part 11a and the second connecting part 12a) corresponding to the second light emitting device 122 can be different. For example, relative to the first light emitting device 121, the corresponding transmittance of the laser with the same power density passing through the light emitting body 12b of the second light emitting device 122 is higher; then under the laser irradiation with the same power density, the welding structure corresponding to the first light emitting device 121 is less heated by the laser irradiation than the welding structure corresponding to the second light emitting device 122, which easily leads to poor welding effect of the first light emitting device 121.

[0055] Therefore, in order to compensate for the welding effect of the first light-emitting device 121, the present application sets the heat transmitted by the laser receiving layer 13 to the first area S1 to be greater than the heat transmitted to the second area S1, which can play a role in increasing the welding temperature of the first light-emitting device 121. In addition, the heat transmitted by the laser receiving layer 13 to the first area S1 is greater than the heat transmitted to the second area S2, which can also reduce the degree of increase in the welding temperature of the second light-emitting device 122 and avoid the phenomenon of over-melting of the welding structure.

[0056] In one embodiment of the present application, Figure 2 As shown, the laser receiving layer 13 is located on a side of the first connecting portion 11 a away from the light emitting device 12 .

[0057] Figure 4 A schematic cross-sectional view of a partial structure of a display panel provided in the present application.

[0058] In one embodiment of the present application, Figure 4 As shown, the laser receiving layer 13 and the first connecting portion 11 a may be located in the same film layer.

[0059] In one embodiment of the present application, the laser receiving layer 13 may be a film layer located in the array substrate 11 .

[0060] Figure 5 A schematic cross-sectional view of a partial structure of a display panel provided in the present application.

[0061] In one embodiment of the present application, Figure 5As shown, the laser receiving layer 13 includes a first light reflecting structure 131, and the first light reflecting structure 131 overlaps with the first light emitting device 121 along a direction perpendicular to the plane where the display panel 10 is located. Compared with other light-transmitting film layers (such as a flat layer, etc.), the first light reflecting structure 131 can have a greater light reflectivity to the laser.

[0062] Since the laser receiving layer 13 can be located on the side of the second connection part 12a close to the array substrate 11, during the welding process, when the laser is irradiated to the first light reflecting structure 131 through the film layer where the first light emitting device 121 is located, part of the laser can be reflected by the first light reflecting structure 131 and then irradiated to the second connection part 12a, and heat the second connection part 12a. Therefore, the arrangement of this embodiment helps to increase the laser energy irradiated to the welding structure, which is conducive to increasing the maximum temperature that the welding structure corresponding to the first light emitting device 121 can reach during welding, thereby improving the bonding effect.

[0063] Figure 6 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Figure 7 for Figure 6 The projection diagram of the partial structure of the display panel shown is for easy understanding. Fig. 9 Only Figure 8 The distribution of projections corresponding to the light-emitting devices and the second light reflecting structure respectively.

[0064] In one embodiment of the present application, Figure 6 and Figure 7 The laser receiving layer 13 includes a second light reflecting structure 132, and an orthographic projection M1 of the second light reflecting structure 132 on the array substrate 11 at least partially surrounds an orthographic projection M2 of the second light emitting device 122 on the array substrate 11. Compared with other light-transmitting film layers (such as a flat layer, etc.), the first light reflecting structure 131 may have a greater light reflectivity to the laser.

[0065] During the welding process, the area around the second light-emitting device 122 can generate heat when it is irradiated by the laser. When this part of the heat is conducted to the vicinity of the welding structure corresponding to the second light-emitting device 122, it will increase the welding temperature corresponding to the welding structure. Since the orthographic projection M1 of the second light-reflecting structure 132 on the array substrate 11 at least partially surrounds the orthographic projection M2 of the second light-emitting device 122 on the array substrate 11, part of the laser can be reflected by the second light-reflecting structure 132 when irradiating the area around the second light-emitting device 122. Therefore, the amount of laser absorbed by the laser receiving layer 13 can be reduced, and accordingly, the heat transmitted from the laser receiving layer 13 to the second area S2 is reduced. The setting method of the present application helps to reduce the heat transmitted from the laser receiving layer 13 to the welding structure corresponding to the second light-emitting device 122, which is conducive to reducing the probability of over-melting of the welding structure corresponding to the second light-emitting device 122.

[0066] Figure 8 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig. 9 for Figure 8 The projection diagram of the partial structure of the display panel shown is for easy understanding. Fig. 9 Only Figure 8 The distribution of projections corresponding to the light-emitting device, the first light reflecting structure and the second light reflecting structure respectively.

[0067] In one embodiment of the present application, Figure 8 and Fig. 9 The laser receiving layer 13 includes a first light reflecting structure 131 and a second light reflecting structure 132. The first light reflecting structure 131 overlaps with the first light emitting device 121 in a direction perpendicular to the plane where the display panel 10 is located. The orthographic projection M3 of the first light reflecting structure 131 on the array substrate 11 and the orthographic projection M4 of the first light emitting device 121 on the array substrate 11 may overlap. The orthographic projection M1 of the second light reflecting structure 132 on the array substrate 11 at least partially surrounds the orthographic projection M2 of the second light emitting device 122 on the array substrate 11.

[0068] In the embodiment of the present application, by simultaneously providing the first light reflecting structure 131 and the second light reflecting structure 132, it is helpful to increase the welding temperature corresponding to the first light-emitting device 121 while reducing the probability of over-melting of the second light-emitting device 122, which is beneficial to achieving consistency in the bonding effect of the first light-emitting device 121 and the bonding effect of the second light-emitting device 122, thereby improving the finished product yield of the display panel 10.

[0069] Fig.10 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig.11 for Fig.10The projection diagram of the partial structure of the display panel shown is for easy understanding. Fig.11 Only Fig.12 The distribution of projections corresponding to the light-emitting devices and the first light reflecting structure respectively.

[0070] In one embodiment of the present application, Fig.10 and Fig.11 , along a direction perpendicular to the plane where the display panel 10 is located, the first light reflecting structure 131 covers the first light emitting device 121 .

[0071] There is a gap between at least a portion of the edge of the orthographic projection M3 of the first light reflecting structure 131 on the array substrate 11 and the edge of the orthographic projection M4 of the first light emitting device 121 on the array substrate 11 .

[0072] Since the first light reflecting structure 131 covers the first light emitting device 121 and there is a gap between at least part of the edge of M3 and the edge of M4, the projection area of ​​the first light reflecting structure 131 can be larger than the projection area of ​​the first light emitting device 121. The configuration of the present application helps to increase the amount of laser irradiated to the first light reflecting structure 131, thereby enhancing the laser energy reflected by the first light reflecting structure 131 to the welding structure, which is conducive to increasing the welding temperature.

[0073] Fig.12 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig.13 for Fig.12 The projection diagram of the partial structure of the display panel shown is for easy understanding. Fig.13 Only Fig.12 The distribution of projections corresponding to the light-emitting devices and the second light reflecting structure respectively.

[0074] In one embodiment of the present application, Fig.12 and Fig.13 , along a direction perpendicular to the plane where the display panel 10 is located, there is a gap between at least a portion of the edge of the orthographic projection M1 of the second light reflecting structure 132 on the array substrate 11 and the edge of the orthographic projection M2 of the second light emitting device 122 on the array substrate 11 .

[0075] Since M1 can surround M2 and there is a gap between at least part of the edge of M1 and the edge of M2, there is a partial area (edge ​​area) around the second light-emitting device 122 where the second light-reflecting structure 132 is not set. Due to the setting of the above-mentioned edge area, relative to the situation where the edge of M1 is tangent to the edge of M2, the spacing between the second light-reflecting structure 132 and the welding structure corresponding to the second light-emitting device 122 increases, and the angle range of the laser that can be reflected from the second light-reflecting structure 132 to the welding structure corresponding to the second light-emitting device 122 is reduced. Therefore, the setting method of the present application can reduce the probability that the laser irradiated to the second light-reflecting structure 132 is reflected to the welding structure corresponding to the second light-emitting device 122.

[0076] In a possible implementation, there is a portion located in the edge area on the laser receiving layer 13, and the light reflectivity of the portion is lower than the light reflectivity of the second light reflecting structure 132. The arrangement of this implementation can further reduce the laser energy reflected to the welding structure corresponding to the second light emitting device 122 by arranging a film layer structure with a lower light reflectivity in the edge area.

[0077] Fig.14 Schematic diagram of the change of the microstructure of some constituent materials included in the laser receiving layer with temperature.

[0078] In one embodiment of the present application, the constituent material of the first light reflecting structure 131 and the constituent material of the second light reflecting structure 132 both include vanadium dioxide.

[0079] like Fig.14 As shown, when the ambient temperature T of vanadium dioxide is not higher than the threshold temperature t (for example, 68°C), vanadium dioxide can present a monoclinic phase structure, and at this time, vanadium dioxide can exhibit a macroscopic characteristic of higher light transmittance; when the ambient temperature T of vanadium dioxide is higher than the threshold temperature t, vanadium dioxide can present a tetragonal phase (rutile R phase) structure, and at this time, vanadium dioxide can exhibit a macroscopic characteristic of higher light reflectivity.

[0080] If the constituent material of the first light reflecting structure 131 includes vanadium dioxide, since the welding temperature can be at a high value (greater than 68° C.) during most of the welding process, the first light reflecting structure 131 can reflect the laser and has a high degree of reflection of the laser.

[0081] In addition, if the constituent material of the second light reflecting structure 132 includes vanadium dioxide, since the welding temperature is gradually increased, that is, the ambient temperature of the welding structure of the second light emitting device 122 can be increased from room temperature (lower than 68°C) to the temperature required for welding (higher than 68°C). In the process of increasing the welding temperature to the above-mentioned threshold temperature, since vanadium dioxide can show the property of high laser transmittance, the probability of the laser irradiated around the second light emitting device 122 being reflected to the welding structure through the second light reflecting structure 132 is low. Compared with setting a conventional film layer (without high transmittance) around the second light emitting device 122, the process of increasing the welding temperature corresponding to the second light emitting device 122 is delayed to a certain extent. Since the laser irradiation time is limited, this setting can reduce the upper limit of the temperature of the welding structure corresponding to the second light emitting device 122 after being irradiated by the laser, and reduce the probability of over-melting.

[0082] Fig.15 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig.16 for Fig.15 The projection diagram of the partial structure of the display panel shown is for easy understanding. Fig.16 Only Fig.15 The distribution of projections corresponding to the light-emitting device, the first light reflecting structure and the light absorbing structure respectively.

[0083] In one embodiment of the present application, Fig.15 and Fig.16 The laser receiving layer 13 includes a light absorption structure 133, and the orthographic projection M5 of the light absorption structure 133 on the array substrate 11 at least partially surrounds the orthographic projection M4 of the first light emitting device 121 on the array substrate 11. The orthographic projection M5 of the light absorption structure 133 on the array substrate 11 can surround the orthographic projection M3 of the first light reflecting structure 131 on the array substrate 11.

[0084] The light absorption structure 133 can absorb the laser irradiated thereon and generate heat, which can be used to increase the welding temperature of the first light emitting device 121. Compared with other light-transmitting film layers (such as a flat layer, etc.), the light absorption structure 133 can have a greater absorption rate for laser. The constituent material of the light absorption structure 133 can include a black material.

[0085] In the embodiment of the present application, the light absorption structure 133 can absorb the laser irradiated to the surrounding area of ​​the first light-emitting device 121 and convert the light energy into heat energy, thereby assisting in increasing the welding temperature when the first light-emitting device 121 is bonded and enhancing the corresponding bonding effect of the first light-emitting device 121.

[0086] Fig.17 A schematic cross-sectional view of a partial structure of a display panel provided in the present application.

[0087] In one possible implementation, Fig.17 As shown, the laser receiving layer 13 only includes the light absorption structure 133 , which helps to reduce the preparation complexity of the laser receiving layer 13 and reduce the cost.

[0088] Fig.18 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig.19 for Fig.18 The projection diagram of the partial structure of the display panel shown is for easy understanding. Fig.19 Only Fig.18 The distribution of projections corresponding to the light-emitting device, the first light reflecting structure and the light absorbing structure respectively.

[0089] In one embodiment of the present application, Fig.18 and Fig.19 There is a gap between at least part of the inner edge of the orthographic projection M5 of the light absorbing structure 133 on the array substrate 11 and the edge of the orthographic projection M4 of the first light emitting device 121 on the array substrate 11, and the orthographic projection M3 of the first light reflecting structure 131 on the array substrate 11 can cover the orthographic projection M5 of the first light emitting device 121 on the array substrate 11.

[0090] Since M5 can surround M4 and there is a gap between the inner edge of M5 and the edge of M4, there is a partial area around the first light-emitting device 121 where the light absorption structure 133 is not provided. Due to the provision of the above partial area, compared with the case where the edge of M5 is tangent to the edge of M4, the spacing between the light absorption structure 133 and the welding structure corresponding to the first light-emitting device 121 increases, and the probability of the light absorption structure 133 absorbing the laser used to heat the welding structure of the first light-emitting device 121 is reduced, thereby avoiding the phenomenon that the light absorption structure 133 excessively absorbs the laser and weakens the bonding effect of the first light-emitting device 121.

[0091] Fig. 20 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig.21 A schematic cross-sectional view of a partial structure of a display panel provided in the present application.

[0092] In one embodiment of the present application, Fig. 20 and Fig.21 The laser receiving layer 13 includes a first light reflecting structure 131 and a light absorbing structure 133. Along a direction perpendicular to the plane where the display panel 10 is located, the first light reflecting structure 131 overlaps with the first light emitting device 121, and the orthographic projection of the light absorbing structure 133 on the array substrate 11 at least partially surrounds the orthographic projection of the first light emitting device 121 on the array substrate 11.

[0093] Among them, combined Fig. 20 and Fig.21 The surface of the first light reflecting structure 131 away from the array substrate 11 is closer to the array substrate 11 than the surface of the light absorbing structure 133 away from the array substrate 11, the surface of the light absorbing structure 133 close to the array substrate 11 is closer to the array substrate 11 than the surface of the first light reflecting structure 131 away from the array substrate 11, or the surface of the light absorbing structure 133 close to the array substrate 11 is flush with the surface of the first light reflecting structure 131 away from the array substrate 11.

[0094] Combination Fig. 20 and Fig.21 , along the direction perpendicular to the plane where the display panel 10 is located, the distance between the surface of the first light reflecting structure 131 away from the array substrate 11 and the surface of the first light emitting device 121 away from the array substrate 11 is h1, and the distance between the surface of the light absorbing structure 133 away from the array substrate 11 and the surface of the first light emitting device 121 away from the array substrate 11 is h2, h1>h2. In addition, the distance between the surface of the light absorbing structure 133 close to the array substrate 11 and the surface of the first light emitting device 121 away from the array substrate 11 is h3, h1≤h3

[0095] In the embodiment of the present application, along the direction perpendicular to the plane where the display panel 10 is located, the light absorption structure 133 may include a third portion 133a protruding from the plane where the first light reflection structure 131 is located. The side of the third portion 133a can receive the laser reflected at a large angle by the first light reflection structure 131 (this portion of the laser usually does not irradiate the welding structure), and the third portion 133a can use this portion of the laser to generate heat, so as to improve the utilization efficiency of the laser and improve the bonding effect of the first light emitting device 121.

[0096] Fig. 22 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig.23 A schematic cross-sectional view of a partial structure of a display panel provided in the present application.

[0097] In one embodiment of the present application, Fig. 22 and Fig.23 The light emitting device 12 further includes a light emitting body 12 b , which is located on a side of the second connecting portion 12 a away from the array substrate 11 .

[0098] The surface of the light emitting body 12b close to the array substrate 11 is closer to the array substrate 11 than the surface of the light absorbing structure 133 away from the array substrate 11 or the surface of the light emitting body 12b close to the array substrate 11 is flush with the surface of the light absorbing structure 133 away from the array substrate 11.

[0099] Combination Fig. 22 and Fig.23 , along the direction perpendicular to the plane where the display panel 10 is located, the maximum distance (thickness) between the surface of the light-emitting body 12b close to the array substrate 11 and the surface of the light-emitting body 12b away from the array substrate 11 is h4, and the distance between the surface of the light-absorbing structure 133 away from the array substrate 11 and the surface of the light-emitting body 12b away from the array substrate 11 is h5, and h4≥h5.

[0100] In the embodiment of the present application, along the direction perpendicular to the plane where the display panel 10 is located, the thickness of the third part 133a on the light absorption structure 133 can be greater than or equal to the distance between the light-emitting body 12b and the first light reflecting structure 131, so that the light absorption structure 133 can receive most of the laser reflected at a large angle from the first light reflecting structure 131, thereby realizing the effective utilization of the laser that is not reflected to the welding structure by the light absorption structure 133, and further improving the bonding effect of the first light-emitting device 121.

[0101] Fig.24 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig.25 for Fig.24 The projection diagram of the partial structure of the display panel shown is for easy understanding. Fig.25 Only Fig.24 The distribution of projections corresponding to the light-emitting device, the second light reflecting structure and the light absorbing structure respectively.

[0102] In one embodiment of the present application, Fig.24 and Fig.25 The laser receiving layer 13 includes a second light reflecting structure 132 and a light absorbing structure 133, wherein an orthographic projection M1 of the second light reflecting structure 132 on the array substrate 11 at least partially surrounds an orthographic projection M2 of the second light emitting device 122 on the array substrate 11, and an orthographic projection M5 of the light absorbing structure 133 on the array substrate 11 at least partially surrounds an orthographic projection M4 of the first light emitting device 121 on the array substrate 11.

[0103] The first light emitting devices 121 and the second light emitting devices 122 are arranged along a first direction X, and the first direction X is parallel to the plane where the display panel 10 is located.

[0104] In an opposing region between the adjacent first light emitting devices 121 and second light emitting devices 122 , a length w1 of the second light reflecting structure 132 in the first direction X is greater than a length w2 of the light absorbing structure 133 in the first direction X.

[0105] In the embodiment of the present application, in the region between the first light emitting device 121 and the second light emitting device 122, if the light absorbing structure 133 occupies a larger area, the function of the light absorbing structure 133 to absorb the laser and generate heat has a greater impact on the welding process of the second light emitting device 122 than the function of the second light reflecting structure 132 to reflect the laser, resulting in an increased risk of overmelting of the welding structure of the second light emitting device 122. Therefore, in the embodiment of the present application, by setting the width of the second light reflecting structure 132 to be greater than the width of the light absorbing structure 133, the impact of the heat generated by the light absorbing structure 133 on the welding process of the second light emitting device 122 can be reduced as much as possible.

[0106] Fig.26 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig. 27 for Fig.26 A schematic projection diagram of a partial structure of a display panel is shown.

[0107] Combination Fig.26 and Fig. 27 The display panel 10 may include a plurality of first light-emitting devices 121 and a second light-emitting device 122, and the plurality of first light-emitting devices 121 may include a first sub-light-emitting device 1211 and a second sub-light-emitting device 1212, wherein the light-emitting color of the second light-emitting device 122 may be red, and the light-emitting color of the first sub-light-emitting device 1211 and the light-emitting color of the second sub-light-emitting device 1212 may be blue and green, respectively.

[0108] The orthographic projection M5 of the light absorbing structure 133 on the array substrate 11 at least partially surrounds the orthographic projection M41 of the first sub-light emitting device 1211 on the array substrate 11 and the orthographic projection M42 of the second light emitting device 122 on the array substrate 11, and the orthographic projection M1 of the second light reflecting structure 132 on the array substrate 11 at least partially surrounds the orthographic projection M2 of the second light emitting device 122 on the array substrate 11.

[0109] Fig.28 A cross-sectional schematic diagram of a partial structure of a display panel provided in the present application, Fig.29 for Fig.28 A schematic projection diagram of a partial structure of a display panel is shown.

[0110] In addition, combined Fig.28 and Fig.29, the first light reflecting structure 131 overlapping with the first sub-light emitting device 1211 may be a first reflecting layer 1311, and the first light reflecting structure 131 overlapping with the second sub-light emitting device 1212 may be a second reflecting layer 1312. The orthographic projection M5 of the light absorbing structure 133 on the array substrate 11 may at least partially surround the orthographic projection M41 of the first sub-light emitting device 1211 on the array substrate 11 and the orthographic projection M42 of the second light emitting device 122 on the array substrate 11, and the orthographic projection M5 of the light absorbing structure 133 on the array substrate 11 may at least partially surround the orthographic projection M31 of the first reflecting layer 1311 on the array substrate 11 and the orthographic projection M32 of the second reflecting layer 1312 on the array substrate 11.

[0111] Fig.30 A schematic diagram of a display device provided in the present application.

[0112] The present application provides a display device 20, such as Fig.30 As shown, the display device 20 includes the above-mentioned display panel 10. The display device 20 may be a mobile phone, or may be an electronic device such as a computer or a television.

[0113] The uniformity of the bonding effects respectively corresponding to the different light-emitting devices 12 in the display device 20 provided in the embodiment of the present application is greatly improved.

[0114] In this specification, the same or similar parts between the various embodiments can be referred to each other. In particular, for the device embodiment and the terminal embodiment, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiment.

Claims

1. A display panel, characterized in that: include: An array substrate, wherein the array substrate comprises a first connecting portion; A plurality of light emitting devices, each of which comprises a second connecting portion, wherein the first connecting portion is electrically connected to the second connecting portion; the plurality of light emitting devices comprises a first light emitting device and a second light emitting device; a laser receiving layer, the laser receiving layer being located on a side of the second connecting portion close to the array substrate; a first region and a second region, the first light emitting device is located in the first region, and the second light emitting device is located in the second region; the heat transferred by the laser receiving layer to the first region is greater than the heat transferred to the second region.

2. The display panel according to claim 1, characterized in that: The laser receiving layer is located on a side of the first connecting portion away from the light emitting device.

3. The display panel according to claim 1, characterized in that: The laser receiving layer includes a first light reflecting structure and / or a second light reflecting structure. The first light reflecting structure overlaps with the first light emitting device along a direction perpendicular to the plane where the display panel is located, and the orthographic projection of the second light reflecting structure on the array substrate at least partially surrounds the orthographic projection of the second light emitting device on the array substrate.

4. The display panel according to claim 3, characterized in that: The first light reflecting structure covers the first light emitting device along a direction perpendicular to the plane where the display panel is located; There is a gap between at least a portion of the edge of the orthographic projection of the first light reflecting structure on the array substrate and the edge of the orthographic projection of the first light emitting device on the array substrate.

5. The display panel according to claim 3, characterized in that: There is a gap between at least a portion of the edge of the orthographic projection of the second light reflecting structure on the array substrate and the edge of the orthographic projection of the second light emitting device on the array substrate.

6. The display panel according to claim 3, characterized in that: The constituent material of the first light reflecting structure and the constituent material of the second light reflecting structure both include vanadium dioxide.

7. The display panel according to claim 1 or 3, characterized in that: The laser receiving layer includes a light absorbing structure, and an orthographic projection of the light absorbing structure on the array substrate at least partially surrounds an orthographic projection of the first light emitting device on the array substrate.

8. The display panel according to claim 7, characterized in that: There is a gap between at least a portion of an inner edge of an orthographic projection of the light absorbing structure on the array substrate and an edge of an orthographic projection of the first light emitting device on the array substrate.

9. The display panel according to claim 1, characterized in that: The laser receiving layer comprises a first light reflecting structure and a light absorbing structure, wherein the first light reflecting structure overlaps with the first light emitting device in a direction perpendicular to the plane where the display panel is located, and the orthographic projection of the light absorbing structure on the array substrate at least partially surrounds the orthographic projection of the first light emitting device on the array substrate; Among them, the surface of the first light reflecting structure away from the array substrate is closer to the array substrate than the surface of the light absorbing structure away from the array substrate, the surface of the light absorbing structure close to the array substrate is closer to the array substrate than the surface of the first light reflecting structure away from the array substrate, or the surface of the light absorbing structure close to the array substrate is flush with the surface of the first light reflecting structure away from the array substrate.

10. The display panel according to claim 9, characterized in that: The light emitting device further comprises a light emitting body, and the light emitting body is located at a side of the second connecting portion away from the array substrate; The surface of the light emitting body close to the array substrate is closer to the array substrate than the surface of the light absorbing structure away from the array substrate or the surface of the light emitting body close to the array substrate is flush with the surface of the light absorbing structure away from the array substrate.

11. The display panel according to claim 1, characterized in that: The laser receiving layer comprises a second light reflecting structure and a light absorbing structure, wherein the orthographic projection of the second light reflecting structure on the array substrate at least partially surrounds the orthographic projection of the second light emitting device on the array substrate, and the orthographic projection of the light absorbing structure on the array substrate at least partially surrounds the orthographic projection of the first light emitting device on the array substrate; The first light emitting device and the second light emitting device are arranged along a first direction, and the first direction is parallel to the plane where the display panel is located; In an opposing region between the adjacent first light emitting devices and the second light emitting devices, a length of the second light reflecting structure in the first direction is greater than a length of the light absorbing structure in the first direction.

12. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-11.

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