Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. The display panel comprises a display area and a non-display area, the non-display area surrounds at least part of the display area; the display panel further comprises a display substrate, a plurality of light emitting devices and a heat-conducting trace, the light emitting devices are arranged on the display substrate, and the light emitting devices are located in the display area; the heat-conducting trace comprises a first part and a second part which are electrically connected, at least part of the light emitting devices are connected with the first part, and the second part extends from the display area to the non-display area or to the backlight side of the display panel. The heat generated by the light emitting devices can be conducted to the periphery of the display area, which is conducive to reducing the brightness change of the light emitting devices caused by high temperature and improving the high-temperature color cast problem of the display panel.

Description

TECHNICAL FIELD

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

[0002] In recent years, micro light emitting diode (Micro-LED) has gradually become the focus of research in the display field due to its long service life, high contrast, fast response speed and other advantages.

[0003] However, in the prior art, the micro light emitting diode has a heating problem, which is prone to change in brightness at high temperature, resulting in color deviation of the display panel using the micro light emitting diode at high temperature, affecting the display quality. SUMMARY

[0004] Therefore, the embodiments of the present application provide a display panel and a display device to solve the above problems.

[0005] In a first aspect, the embodiments of the present application provide a display panel, comprising a display area and a non-display area, the non-display area surrounding at least part of the display area; the display panel further comprises a display substrate, a plurality of light emitting devices and a heat-conducting trace, the light emitting devices are arranged on the display substrate, and the light emitting devices are located in the display area; the heat-conducting trace comprises a first part and a second part electrically connected, at least part of the light emitting devices are connected to the first part, and the second part extends from the display area to the non-display area or a backlight side of the display panel.

[0006] In an implementation form of the first aspect, the light emitting device comprises a main body and a pin, and the first part is connected to a side surface of the main body.

[0007] In an implementation form of the first aspect, the display substrate comprises a bonding electrode, the bonding electrode is electrically connected to the pin of the light emitting device; the display panel further comprises a planarization layer and a first insulating layer, the planarization layer is located between the main body of the light emitting device and the display substrate, the first insulating layer is located on a side of the planarization layer away from the display substrate, and the heat-conducting trace is arranged on the first insulating layer.

[0008] In an implementation form of the first aspect, the first insulating layer is an inorganic layer.

[0009] In an implementation form of the first aspect, the plurality of light emitting devices comprise first color light emitting devices, second color light emitting devices and third color light emitting devices, and the first color light emitting devices are connected to the first part.

[0010] In one implementation of the first aspect, the display area includes multiple pixel units, and each pixel unit includes a first color light-emitting device, a second color light-emitting device, and a third color light-emitting device arranged along a first direction; in the same pixel unit, along the first direction, the first color light-emitting device is either the first or last light-emitting device in the pixel unit.

[0011] In one implementation of the first aspect, the main body of the first color light-emitting device includes a first side and a second side opposite to each other in a first direction, and a third side and a fourth side opposite to each other in a second direction. In the same pixel unit, the first side is located on the side of the first color light-emitting device away from the second color light-emitting device and the third color light-emitting device, and the second direction intersects with the first direction. The first part includes a plurality of first sub-parts. In the first color light-emitting device, at least the first side, the third side and the fourth side are respectively connected to different first sub-parts.

[0012] In one implementation of the first aspect, the main body of the second color light-emitting device includes a fifth side and a sixth side opposite to each other in a first direction, and a seventh side and an eighth side opposite to each other in a second direction, the second direction intersecting the first direction; the first part includes a plurality of first sub-parts, and in the second color light-emitting device, at least the seventh side and the eighth side are respectively connected to different first sub-parts.

[0013] In one implementation of the first aspect, the main body of the third color light-emitting device includes a ninth side and a tenth side opposite to each other in a first direction, and an eleventh side and a twelfth side opposite to each other in a second direction, the second direction intersecting the first direction; the first part includes a plurality of first sub-parts, and in the third color light-emitting device, at least the eleventh side and the twelfth side are respectively connected to different first sub-parts.

[0014] In one implementation of the first aspect, the display area includes multiple rows of pixel units arranged along a second direction, which intersects with the first direction; in the display area, the second portion is located between two adjacent rows of pixel units.

[0015] In one implementation of the first aspect, the line width of the first part is smaller than the line width of the second part.

[0016] In one implementation of the first aspect, the line width of the first part is D1, and the width of the side of the light-emitting device connected to the first part is D2, where D2 / 4≤D1≤D2.

[0017] In one implementation of the first aspect, the thermally conductive traces include at least one of metal, carbon fiber, and graphene.

[0018] In one implementation of the first aspect, the first color light-emitting device is a red light-emitting device, the second color light-emitting device is a green light-emitting device, and the third color light-emitting device is a blue light-emitting device.

[0019] Secondly, embodiments of this application provide a display device, including a display panel as provided in the first aspect.

[0020] In this embodiment, the first part of the heat-conducting trace is connected to the light-emitting device, and the second part extends to the non-display area or the backlight surface of the display panel. The heat emitted by the light-emitting device can be conducted to the periphery of the display area by the heat-conducting trace and dissipated quickly at the periphery of the display area. This helps to reduce the temperature of the light-emitting device in the display area, thereby reducing the brightness change of the light-emitting device caused by high temperature. This, in turn, helps to improve the high-temperature color shift problem of the display panel and improve the display quality. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a plan view of a display panel provided in an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0024] Figure 3 An enlarged schematic diagram of a first part connected to a light-emitting device, provided for an embodiment of this application;

[0025] Figure 4 A plan view of yet another display panel provided in an embodiment of this application;

[0026] Figure 5 A plan view of yet another display panel provided in an embodiment of this application;

[0027] Figure 6 A plan view of yet another display panel provided in an embodiment of this application;

[0028] Figure 7 A plan view of yet another display panel provided in an embodiment of this application;

[0029] Figure 8 A plan view of yet another display panel provided in an embodiment of this application;

[0030] Figure 9 This is a schematic diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0031] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0033] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0034] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0035] Figure 1 This is a plan view of a display panel provided in an embodiment of this application.

[0036] This application embodiment provides a display panel 100, such as Figure 1 As shown, the display panel 100 includes a display area AA and a non-display area NA, with the non-display area NA surrounding at least a portion of the display area AA. For example, as... Figure 1 As shown, the non-display area NA surrounds the entire display area AA.

[0037] Combination Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application. The display panel 100 also includes a display substrate 1 and a plurality of light-emitting devices 2. Optionally, the light-emitting devices 2 are micro-LEDs or mini-LEDs. The light-emitting devices 2 are disposed on the display substrate 1 and are located in the display area AA.

[0038] For example, such as Figure 2As shown, the light-emitting device 2 includes a main body 201 and pins 202, and the display substrate 1 includes a bonding electrode 11. The pins 202 of the light-emitting device 2 are electrically connected to the bonding electrode 11. After the pins 202 of the light-emitting device 2 receive an electrical signal, the main body 201 can emit light.

[0039] like Figure 1 As shown, the display panel 100 also includes a heat-conducting trace 3, which includes a first part 31 and a second part 32 that are electrically connected. At least a portion of the light-emitting device 2 is connected to the first part 31, and the second part 32 extends from the display area AA to the non-display area NA or the backlight surface of the display panel 100. Figure 1 The second part 32 extends to the non-display area NA for illustration.

[0040] In this embodiment, the first part 31 of the heat-conducting trace 3 is connected to the light-emitting device 2, and the second part 32 extends to the non-display area NA or the backlight surface of the display panel 100. The heat emitted by the light-emitting device 2 can be conducted to the periphery of the display area AA by the heat-conducting trace 3, and the heat can be quickly dissipated at the periphery of the display area AA. This helps to reduce the temperature of the light-emitting device 2 in the display area AA, thereby reducing the brightness change of the light-emitting device 2 caused by high temperature, and further improving the high temperature color shift problem of the display panel 100 and improving the display quality.

[0041] Optional, such as Figure 2 As shown, the main body 201 of the light-emitting device 2 includes a side surface S1, and the first part 31 of the heat-conducting trace 3 is connected to the side surface S1 of the main body 201 of the light-emitting device 2. Based on this arrangement, in the direction Z perpendicular to the plane of the display panel 100, the heat-conducting trace 3 can be non-overlapping with the light-emitting surface of the light-emitting device 2, which helps to avoid the heat-conducting trace 3 affecting the normal light emission of the light-emitting device 2.

[0042] For example, such as Figure 3 As shown, Figure 3 This is an enlarged schematic diagram showing the first part 31 connected to the light-emitting device 2 according to an embodiment of this application. The main body 201 of the light-emitting device 2 includes four side surfaces S1, each of which intersects with the first part 31. This is to maximize the dissipation of heat emitted by the light-emitting device 2.

[0043] Optionally, the thermally conductive trace 3 may be made of a metallic material, such as copper or silver, which have good thermal conductivity. It can be fabricated using a photolithography sputtering process.

[0044] Optionally, the thermally conductive trace 3 may be made of carbon fiber or graphene material with good thermal conductivity and may be fabricated using a hot-pressing process. In this way, while effectively dissipating heat from the light-emitting device 2, capacitive crosstalk between the thermally conductive trace 3 and the metal traces in the display substrate 1 can be avoided.

[0045] Please continue to refer to this. Figure 3 In one embodiment of this application, the line width of the first part 31 is D1, and the width of the side surface S1 of the light-emitting device 2 connected to the first part 31 is D2, where D2 / 4≤D1≤D2.

[0046] For example Figure 3 As shown, the side surface S1 of the light-emitting device 2 includes a first side surface S11, and the first part 31 includes a first sub-part 311 connected to the first side surface S11. The line width of the first sub-part 311 is D1, and the width of the first side surface S11 is D2, where D2 / 4≤D1≤D2.

[0047] In this embodiment, D2 / 4≤D1≤D2 is set, meaning that the line width of the first part 31 is at least 1 / 4 of the width of the side surface S1 it is connected to, and at most the same width as the side surface S1 it is connected to. This is beneficial to make the contact area between the first part 31 and the side surface S1 it is connected to be larger, which can dissipate the heat emitted by the light-emitting device 2 to a greater extent, thereby helping to ensure the heat dissipation effect of the light-emitting device 2.

[0048] For example, 10μm≤D1≤40μm.

[0049] In one embodiment of this application, such as Figure 2 As shown, the display panel 100 also includes a planarization layer 4 and a first insulating layer 5. The planarization layer 4 is located between the main body 201 of the light-emitting device 2 and the display substrate 1. The first insulating layer 5 is located on the side of the planarization layer 4 away from the display substrate 1. The heat-conducting trace 3 is disposed on the first insulating layer 5.

[0050] Optionally, after the planarization layer 4 is prepared, a first insulating layer 5 is then prepared on the planarization layer 4, and then a thermally conductive trace 3 is prepared on the first insulating layer 5.

[0051] In this embodiment of the application, after the electrical connection between the light-emitting device 2 and the display substrate 1 is completed, the planarization layer 4 can be disposed between the pin 202 of the light-emitting device 2 and the display substrate 1 by photolithography or printing, so as to planarize the area between the display substrate 1 and the light-emitting device 2.

[0052] By setting a first insulating layer 5 between the planarization layer 4 and the heat-conducting trace 3, the insulation effect between the heat-conducting trace 3 and the pin 202 of the light-emitting device 2 can be improved, which helps to avoid the situation where the heat-conducting trace 3 and the pin 202 of the light-emitting device 2 are electrically connected due to the planarization layer 4 not completely covering the pin 202 of the light-emitting device 2.

[0053] Optionally, the planarization layer 4 is an organic layer and the first insulating layer 5 is an inorganic layer.

[0054] Please continue to refer to this. Figure 1In one embodiment of this application, the plurality of light-emitting devices 2 include a first-color light-emitting device 21, a second-color light-emitting device 22, and a third-color light-emitting device 23. Optionally, the first-color light-emitting device 21 is a red light-emitting device, the second-color light-emitting device 22 is a green light-emitting device, and the third-color light-emitting device 23 is a blue light-emitting device.

[0055] The first color light-emitting device 21 is connected to the first part 31.

[0056] For example, such as Figure 1 As shown, in the display panel 100, only the first color light-emitting device 21 can be connected to the first part 31 of the heat-conducting trace 3.

[0057] The inventors of this application have discovered through research that the luminous efficiency of red light-emitting devices decreases significantly at high temperatures, resulting in a noticeable decrease in brightness, which has a significant impact on the high-temperature color shift problem of the display panel 100.

[0058] In view of this, the embodiments of this application connect the first color light-emitting device 21 to the first part 31 of the heat-conducting trace 3, which can quickly dissipate the heat generated by the first color light-emitting device 21, thereby reducing the brightness variation of the first color light-emitting device 21. While improving the high temperature color deviation problem of the display panel 100, it can also reduce the total length of the heat-conducting trace 3 in the display panel 100, which is beneficial to saving costs.

[0059] In one implementation of the embodiments of this application, please continue to refer to Figure 1 The display panel 100 includes multiple pixel units P, and each pixel unit P includes a first color light-emitting device 21, a second color light-emitting device 22, and a third color light-emitting device 23 arranged along a first direction X. That is, adjacent first color light-emitting devices 21, second color light-emitting devices 22, and third color light-emitting devices 23 along the first direction X can form a pixel unit P.

[0060] In the same pixel unit P, along the first direction X, the first color light-emitting device 21 is either the first or last light-emitting device in the pixel unit P. The first direction X can be the row direction of the display panel 100.

[0061] In other words, in this embodiment of the application, the first color light-emitting device 21 can be located at the edge of the pixel unit P.

[0062] For example, such as Figure 1As shown, the main body 201 of the first color light-emitting device 21 includes a first side surface S11 and a second side surface S12 facing each other in the first direction X, and a third side surface S13 and a fourth side surface S14 facing each other in the second direction Y. In the same pixel unit P, the first side surface S11 is located on the side of the first color light-emitting device 21 away from the second color light-emitting device 22 and the third color light-emitting device 23, and the second direction Y intersects with the first direction X. The second direction Y can be the column direction in the display panel 100. Based on this arrangement, the first side surface S11, the third side surface S13, and the fourth side surface S14 of the first color light-emitting device 21 can be located at the edge of the pixel unit P.

[0063] The first part 31 of the heat-conducting trace 3 includes multiple first sub-parts 311. In the first color light-emitting device 21, at least a first side surface S11, a third side surface S13 and a fourth side surface S14 are respectively connected to different first sub-parts 311.

[0064] To ensure the luminous effect of pixel unit P, the light-emitting devices 2 within the same pixel unit P are usually positioned close together, while the distance between two adjacent pixel units P is usually larger than the distance between the light-emitting devices 2 within the pixel unit P. In this embodiment, at least the first side surface S11, the third side surface S13, and the fourth side surface S14 are respectively connected to different first sub-parts 311. On the one hand, this allows the first sub-parts 311 to be positioned between adjacent pixel units P with relatively large gaps, which helps reduce the manufacturing difficulty of the first sub-parts 311. On the other hand, it allows for a larger contact area between the first sub-parts 31 and the first color light-emitting device 21, which facilitates rapid heat dissipation from the first color light-emitting device 21.

[0065] For example, such as Figure 4 As shown, Figure 4 This is a plan view of another display panel provided in an embodiment of this application. In addition to the first side S11, third side S13, and fourth side S14 of the first color light-emitting device 21 being connected to different first sub-parts 311, a second side S12 is also provided to be connected to the first sub-part 311. This further increases the contact area between the first color light-emitting device 21 and the first portion 31 of the heat-conducting trace 3, which is beneficial for further improving the heat dissipation capability of the first color light-emitting device 21, thereby further improving the problem of high-temperature color shift in the display panel 100.

[0066] Figure 5 This is a plan view of another display panel provided in an embodiment of this application.

[0067] In one embodiment of this application, such as Figure 5As shown, the main body 201 of the second color light-emitting device 22 includes a fifth side surface S15 and a sixth side surface S16 opposite each other in the first direction X, and a seventh side surface S17 and an eighth side surface S18 opposite each other in the second direction Y, the second direction Y intersecting the first direction X.

[0068] For example, such as Figure 5 As shown, in the same pixel unit P, the second color light-emitting device 22 is located between the first color light-emitting device 21 and the third color light-emitting device 23. Based on this arrangement, the fifth side S15 and the sixth side S16 of the second color light-emitting device 22 are located inside the pixel unit P, while the seventh side S17 and the eighth side S18 of the second color light-emitting device 22 can be located at the edge of the pixel unit P.

[0069] The first part 31 includes a plurality of first sub-parts 311. In the second color light-emitting device 22, at least a seventh side surface S17 and an eighth side surface S18 are respectively connected to different first sub-parts 311.

[0070] In this embodiment, at least the seventh side S17 and the eighth side S18 of the second color light-emitting device 22 are connected to the first part 31. In this way, the heat-conducting trace 3 can not only dissipate the heat generated by the first color light-emitting device 21, but also dissipate the heat generated by the second color light-emitting device 22. This is beneficial to reduce the brightness change of the second color light-emitting device 22 during operation, thereby further improving the high-temperature color deviation problem of the display panel 100.

[0071] Moreover, as can be seen from the foregoing analysis, the distance between two adjacent pixel units P can be set to be relatively large. In this embodiment, at least the seventh side S17 and the eighth side S18 of the second color light-emitting device 22 are respectively connected to different first sub-parts 311. In this way, while ensuring the heat generated by the second color light-emitting device 22 is dissipated, the first sub-parts 311 connected to the seventh side S17 and the eighth side S18 can be set between pixel units P with larger gaps. This is beneficial to reduce the manufacturing difficulty of the first sub-parts 311 connected to the side of the second color light-emitting device 22 in terms of process.

[0072] For example, such as Figure 6 As shown, Figure 6This is a plan view of another display panel provided in an embodiment of this application. Besides the seventh side S17 and eighth side S18 of the second color light-emitting device 22 being connected to different first sub-parts 311, the fifth side S15 and sixth side S16 of the second color light-emitting device 22 can also be connected to the first sub-parts 311. This increases the contact area between the second color light-emitting device 22 and the heat-conducting trace 3, which is beneficial for improving the heat dissipation capability of the second color light-emitting device 22 and improving the brightness stability of the second color light-emitting device 22 during operation.

[0073] Please continue to refer to this. Figure 5 In one embodiment of this application, the main body 201 of the third color light-emitting device 23 includes a ninth side surface S19 and a tenth side surface S110 opposite each other in the first direction X, and an eleventh side surface S111 and a twelfth side surface S112 opposite each other in the second direction Y, the second direction Y intersecting the first direction X.

[0074] For example, such as Figure 5 As shown, in two adjacent pixel units P along the first direction X, the third color light-emitting device 23 of one is adjacent to the first color light-emitting device 21 of the other. That is, in the same pixel unit P, the first color light-emitting device 21 and the third color light-emitting device 23 can be the first and last light-emitting devices in the pixel unit P, respectively. Based on this arrangement, the eleventh side S111 and the twelfth side S112 of the third color light-emitting device 23 can be located at the edge of the pixel unit P.

[0075] The first part 31 of the heat-conducting trace 3 includes multiple first sub-parts 311. In the third color light-emitting device 23, at least an eleventh side surface S111 and a twelfth side surface S112 are respectively connected to different first sub-parts 311.

[0076] In this embodiment, at least the eleventh side S111 and the twelfth side S112 of the third color light-emitting device 23 are connected to the first sub-part 311. In this way, the heat-conducting trace 3 can not only dissipate the heat generated by the first color light-emitting device 21, but also dissipate the heat generated by the third color light-emitting device 23. This helps to reduce the brightness change of the third color light-emitting device 23 during operation, thereby further improving the high-temperature color deviation problem of the display panel 100.

[0077] Furthermore, as can be seen from the foregoing analysis, the distance between two adjacent pixel units P can be set to be relatively large. In this embodiment, at least the eleventh side S111 and the twelfth side S112 of the third color light-emitting device 23 are respectively connected to different first sub-parts 311. In this way, while ensuring the heat generated by the third color light-emitting device 23 is dissipated, the first sub-parts 311 connected to the eleventh side S111 and the twelfth side S112 can be set between pixel units P with larger gaps. This is beneficial to reduce the manufacturing difficulty of the first sub-parts 311 connected to the side of the third color light-emitting device 23 in terms of process.

[0078] Optional, such as Figure 7 As shown, Figure 7 This is a planar schematic diagram of another display panel provided in an embodiment of this application. In the same pixel unit P, the tenth side surface S110 of the third color light-emitting device 23 is located on the side of the third color light-emitting device 23 away from the second color light-emitting device 22 and the first color light-emitting device 21. That is, the tenth side surface S110 of the third color light-emitting device 23 can be located at the edge of the pixel unit P. In this embodiment of the application, the tenth side surface S110 of the third color light-emitting device 23 can also be connected to the first sub-part 311. While ensuring that the fabrication of the first sub-part 311 is relatively easy, the contact area between the third color light-emitting device 23 and the first part 31 of the heat-conducting line 3 can be increased, further improving the heat dissipation capability of the heat-conducting line 3 for the heat emitted by the third color light-emitting device 23.

[0079] Furthermore, such as Figure 6 As shown, the ninth side S19, tenth side S110, eleventh side S111, and twelfth side S112 of the third color light-emitting device 23 can also be configured to intersect with the first sub-part 311. In this way, the contact area between the third color light-emitting device 23 and the heat-conducting trace 3 can be increased to a greater extent, which is beneficial to further improve the heat dissipation capability of the third color light-emitting device 23 and improve the brightness stability of the third color light-emitting device 23 during operation.

[0080] Of course, such as Figure 6 As shown, the sides of the first color light-emitting device 21, the second color light-emitting device 22, and the third color light-emitting device 23 can all be connected to the first part 31 of the heat-conducting trace 3, so that the heat generated by the first color light-emitting device 21, the second color light-emitting device 22, and the third color light-emitting device 23 can be discharged to the display area AA, thereby improving the brightness stability of the first color light-emitting device 21, the second color light-emitting device 22, and the third color light-emitting device 23 during operation and improving the problem of high temperature color deviation in the display panel 100.

[0081] In one embodiment of this application, please continue to refer toFigure 6 The display area AA includes multiple pixel unit rows PA, each pixel unit row PA includes multiple pixel units P arranged along the first direction X, and the multiple pixel unit rows PA are arranged along the second direction Y, which intersects with the first direction X.

[0082] In the display area AA, the second part 32 of the heat-conducting trace 3 is located between two adjacent pixel cell rows PA.

[0083] As the foregoing analysis shows, since the distance between pixel units P can be set relatively large, the distance between two adjacent pixel unit rows PA can also be set relatively large. In this embodiment, the second part 32 of the heat-conducting trace 3 is placed between pixel unit rows PA with larger gaps. This allows the line width of the second part 32 to be set relatively large, which is beneficial to improving the heat conduction capability of the second part 32. This facilitates the heat-conducting trace 3 to quickly conduct the heat generated by the light-emitting device 2 to the non-display area NA or the backlight surface of the display panel 100, thereby reducing the temperature of the light-emitting device 2 in the display area AA.

[0084] For example, the linewidth of the second part 32 is between 60μm and 150μm.

[0085] For example, the line width of the second part 32 is greater than the line width of the first part 31.

[0086] In one embodiment of this application, such as Figure 5 As shown, the display area AA also includes multiple pixel unit columns PB, each pixel unit column PB comprising multiple pixel units P arranged along the second direction Y, and the multiple pixel unit columns PB arranged along the first direction X. Optionally, the first direction X is the row direction in the display panel 100, and the second direction Y is the column direction in the display panel 100.

[0087] In the display area AA, at least a portion of the second part 32 of the thermally conductive trace 3 is located between two adjacent pixel cell columns PB.

[0088] In other words, a portion of the second part 32 can be located between two adjacent pixel unit rows PA, and another portion of the second part 32 can be located between two adjacent pixel unit columns PB. The second part 32 of the heat-conducting trace 3 can be distributed in a grid pattern in the display area AA. Based on this arrangement, the embodiments of this application can increase the number of second parts 32 in the display area AA, further improving the heat conduction capability of the second part 32. This is beneficial for the heat-conducting trace 3 to quickly conduct the heat generated by the light-emitting device 2 to the non-display area NA or the backlight surface of the display panel 100, thereby reducing the temperature of the light-emitting device 2 in the display area AA.

[0089] Figure 8 This is a plan view of another display panel provided in an embodiment of this application.

[0090] In one embodiment of this application, such as Figure 8 As shown, the display panel 100 also includes a driver chip IC, which is used to transmit display signals to the display area AA. The display area AA includes a first area AA1 and a second area AA2, with the first area AA1 being closer to the driver chip IC than the second area AA2. Here, "the first area AA1 being closer to the driver chip IC than the second area AA2" means that the path length for the driver chip IC to transmit signals to the first area AA1 is less than the path length for transmitting signals to the second area AA2.

[0091] The density of the heat-conducting traces 3 in the second region AA2 is less than the density of the heat-conducting traces 3 in the first region AA1.

[0092] For example, within a unit area, the number of the first portion 31 and the second portion 32 of the heat-conducting trace 3 in the first region AA1 is greater than the number of the first portion 31 and the second portion 32 of the heat-conducting trace 3 in the second region AA2, or the line width of the first portion 31 and the second portion 32 of the heat-conducting trace 3 in the first region AA1 is set to be greater than the line width of the first portion 31 and the second portion 32 of the heat-conducting trace 3 in the second region AA2.

[0093] For example, such as Figure 8 As shown, the non-display area NA includes a first non-display area NA1, which is arranged along the second direction Y with the display area AA. The driver chip IC is bonded to the first non-display area NA1. In the first area AA1, each side of the first color light-emitting device 21, the second color light-emitting device 22, and the third color light-emitting device 23 intersects with the first portion 31 of the heat-conducting trace 3. In the second area AA2, only a portion of the side of the first color light-emitting device 21, the second color light-emitting device 22, and the third color light-emitting device 23 may intersect with the first portion 31 of the heat-conducting trace 3.

[0094] The inventors of this application considered that the driver chip IC generates a lot of heat during operation, which can easily be conducted to the first region AA1 of the display area AA, resulting in a high temperature in the first region AA1. Therefore, the density of the heat-conducting traces 3 in the first region AA1 is set to be large, which is conducive to quickly dissipating the heat in the first region AA1, reducing the temperature of the first region AA1, and thus ensuring the brightness stability of the light-emitting device 2 in the first region AA1.

[0095] It should be noted that in some other embodiments, the driver chip IC can also be bonded to the backlight surface of the display panel 100. In the direction perpendicular to the plane of the display panel 100, the display area AA overlaps with the driver chip IC. In this case, the heat generated by the driver chip IC during operation is easily conducted to the overlapping display area AA. The density of the heat-conducting traces 3 in the overlapping area of ​​the display area AA and the driver chip IC can be set to be relatively large to quickly dissipate the heat in this area.

[0096] Figure 9 This is a schematic diagram of a display device provided in an embodiment of this application.

[0097] This application provides a display device 200, such as... Figure 9 As shown, the display device 200 includes the display panel 100 as provided in the above embodiments. For example, the display device 200 can be an electronic device such as a mobile phone, computer, television, vehicle display, or wearable electronic device, and this application does not specifically limit it.

[0098] In the display device 200, a first part 31 of a heat-conducting trace 3 is connected to the light-emitting device 2, and a second part 32 extends to the non-display area NA or the backlight surface of the display panel 100. The heat emitted by the light-emitting device 2 can be conducted to the periphery of the display area AA by the heat-conducting trace 3, and the heat can be quickly dissipated at the periphery of the display area AA. This helps to reduce the temperature of the light-emitting device 2 in the display area AA, thereby reducing the brightness change of the light-emitting device 2 caused by high temperature. This, in turn, helps to improve the high-temperature color shift problem of the display device 200 and improve the display quality.

[0099] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display panel, characterized by, The display panel comprises a display area and a non-display area surrounding at least part of the display area; The display panel further comprises: a display substrate; a plurality of light emitting devices disposed on the display substrate, the light emitting devices being located in the display area; a heat-conducting trace comprising a first part and a second part, at least part of the light emitting devices being in contact with the first part, and the second part extending from the display area to the non-display area or a backlight side of the display panel; the light emitting devices comprising a main body and a pin, and the first part being in direct contact with a side surface of the main body; the display substrate comprising a bonding electrode in electrical connection with the pin of the light emitting device; the display panel further comprising a planarization layer between the main body of the light emitting device and the display substrate, and a first insulating layer on a side of the planarization layer away from the display substrate, and the heat-conducting trace being on a side of the first insulating layer away from the planarization layer.

2. The display panel of claim 1, wherein, The first insulating layer is an inorganic layer.

3. The display panel of claim 1, wherein, The plurality of light emitting devices comprise a first color light emitting device, a second color light emitting device and a third color light emitting device, and the first color light emitting device is in contact with the first part.

4. The display panel of claim 3, wherein, The display area comprises a plurality of pixel units, and each pixel unit comprises the first color light emitting device, the second color light emitting device and the third color light emitting device arranged along a first direction; In the same pixel unit, the first color light emitting device is the first or last light emitting device in the pixel unit along the first direction.

5. The display panel of claim 4, wherein, In the first color light emitting device, the main body comprises a first side surface, a second side surface opposite to the first side surface along a first direction, and a third side surface and a fourth side surface opposite to each other along a second direction intersecting the first direction, and in the same pixel unit, the first side surface is located on a side of the first color light emitting device away from the second color light emitting device and the third color light emitting device; The first part comprises a plurality of first sub-parts, and in the first color light emitting device, at least the first side surface, the third side surface and the fourth side surface are respectively in contact with different first sub-parts.

6. The display panel of claim 4, wherein, In the second color light emitting device, the main body comprises a fifth side surface, a sixth side surface opposite to the fifth side surface along the first direction, and a seventh side surface and an eighth side surface opposite to each other along the second direction; The first part comprises a plurality of first sub-parts, and in the second color light emitting device, at least the seventh side surface and the eighth side surface are respectively in contact with different first sub-parts.

7. The display panel of claim 4, wherein, In the third color light emitting device, the main body comprises a ninth side surface, a tenth side surface opposite to the ninth side surface along the first direction, and an eleventh side surface and a twelfth side surface opposite to each other along the second direction; The first part comprises a plurality of first sub-parts, and in the third color light emitting device, at least the eleventh side surface and the twelfth side surface are respectively in contact with different first sub-parts.

8. The display panel of claim 4, wherein, The display area comprises a plurality of pixel unit rows, and the plurality of pixel unit rows are arranged along a second direction intersecting the first direction. In the display area, the second part is located between two adjacent pixel unit rows.

9. The display panel of claim 1, wherein, The line width of the first part is smaller than the line width of the second part.

10. The display panel of claim 1, wherein, The line width of the first part is D1, the width of the side of the light emitting device connected with the first part is D2, and D2 / 4≤D1≤D2.

11. The display panel of claim 1, wherein, The heat-conducting trace comprises at least one of metal, carbon fiber and graphene.

12. The display panel of claim 5, wherein, The first color light emitting device is a red light emitting device, the second color light emitting device is a green light emitting device, and the third color light emitting device is a blue light emitting device.

13. The display panel of claim 1, wherein, The display panel comprises a driving chip, the display area comprises a first region and a second region, and the first region is closer to the driving chip than the second region. The density of the heat-conducting trace in the second region is smaller than the density of the heat-conducting trace in the first region.

14. A display device comprising: The display panel comprises the display panel according to any one of claims 1-13.

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