CN115132906B - Display panel and display device - Google Patents

Abstract

The invention discloses a display panel and a display device, which relate to the technical field of display, wherein the display panel comprises: the circuit substrate, a plurality of luminous elements and the insulating heat conduction layer, the insulating heat conduction layer is positioned on one side of the circuit substrate facing the light emitting surface of the display panel, the insulating heat conduction layer at least partially surrounds the luminous elements, the insulating heat conduction layer is provided with a hollowed-out part, and the hollowed-out part penetrates through the insulating heat conduction layer along the plane perpendicular to the circuit substrate; the adjustable unit is arranged in the hollowed-out part; at least one adjustable unit is arranged between two adjacent light-emitting elements; when the adjustable unit is not electrified, the heat conductivity coefficient of the adjustable unit is K1, and when the adjustable unit is electrified, the heat conductivity coefficient of the adjustable unit is K2, wherein K2 is more than K1. The invention solves the problem that the display quality and the service life of the display panel are reduced due to heat accumulation of the light-emitting element in the prior art.

Description

Display panel and display device

Technical Field

The present invention relates to the field of display technology, and more particularly, to a display panel and a display device.

Background Art

Light-Emitting Diode (LED) has the advantages of low power consumption, color saturation, fast response speed, and strong contrast, and has great application prospects. However, when LED is working, 20% to 30% is converted into light energy, and the remaining 70% to 80% is converted into heat energy. Micro/Mini LED display and backlight are based on LED light emission. As the demand for resolution and brightness of Micro/MiniLED increases, the number of LEDs per unit area continues to increase, the spacing between LEDs continues to decrease, the driving current of a single LED is getting larger and larger, and the display will have the need to work for a long time, which will cause the heat generation of a single LED to increase and the thermal coupling effect between adjacent LEDs to increase.

The heat generated by the LED is transferred to the quantum dot film, affecting the luminous efficiency; and the heat accumulation will also affect the LED light output rate, affect the LED stability, and reduce the LED service life; and the heat is transferred to the thin film transistor (Thin Film Transistor, TFT) device part in the circuit substrate, which will cause the TFT device to be in a high temperature environment for a long time. As a result, the TFT device will have problems such as poor stability and performance degradation, which will cause the display quality of the entire display system to be reduced and the service life to be shortened.

Summary of the invention

In view of this, the present invention provides a display panel and a display device to solve the problem in the prior art that heat accumulation of light-emitting elements leads to reduced display quality and service life of the display panel.

The present invention provides a display panel, comprising: a circuit substrate; a plurality of light-emitting elements, the light-emitting elements are located on the side of the circuit substrate facing the light-emitting surface of the display panel; an insulating heat-conductive layer, the insulating heat-conductive layer is located on the side of the circuit substrate facing the light-emitting surface of the display panel, and the insulating heat-conductive layer at least partially surrounds the light-emitting elements, the insulating heat-conductive layer is provided with a hollow portion, and the hollow portion penetrates the insulating heat-conductive layer along a plane perpendicular to the circuit substrate; an adjustable unit, the adjustable unit is provided in the hollow portion; at least one adjustable unit is provided between two adjacent light-emitting elements; when the adjustable unit is not powered on, the thermal conductivity of the adjustable unit is K1, and when the adjustable unit is powered on, the thermal conductivity of the adjustable unit is K2, wherein K2＞K1.

Based on the same concept, the present invention further provides a display device, which includes the above-mentioned display panel.

Compared with the prior art, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

In the display panel provided by the present invention, the insulating heat-conducting layer is provided with a hollow portion, and the hollow portion penetrates the insulating heat-conducting layer along a plane perpendicular to the circuit substrate. The display panel also includes an adjustable unit, and the adjustable unit is provided in the hollow portion, and the thermal conductivity of the adjustable unit is adjustable. Among them, when the adjustable unit is not powered on, the thermal conductivity of the adjustable unit is K1, and when the adjustable unit is powered on, the thermal conductivity of the adjustable unit is K2, wherein K2>K1. That is, by providing a voltage signal to the adjustable unit, the thermal conductivity of the adjustable unit is K2, at this time, the adjustable unit has good thermal conductivity, and by not providing a voltage signal to the adjustable unit, the thermal conductivity of the adjustable unit is K1, at this time, the adjustable unit basically has no thermal conductivity. In the display panel provided by the present invention, there is at least one adjustable unit provided between two adjacent light-emitting elements, so that the thermal conductivity of the adjustable unit can be adjusted according to the working state of the light-emitting element arranged adjacent to the adjustable unit. Exemplarily, when the light-emitting elements arranged adjacent to the adjustable unit are both working, the heat of the two light-emitting elements will diffuse to the surroundings, thereby causing heat to accumulate between the two light-emitting elements. At this time, the thermal conductivity of the adjustable unit between the two light-emitting elements is reduced, so that the adjustable unit can separate the heat generated by the two working light-emitting elements, avoiding the heat from accumulating between the two light-emitting elements, thereby avoiding excessive local temperature in the display panel, and effectively improving the display quality and service life of the display panel. When only one of the light-emitting elements arranged adjacent to the adjustable unit is working, at this time, the thermal conductivity of the adjustable unit between the two light-emitting elements is increased, which is conducive to the dissipation of the heat generated by the working light-emitting element, and is conducive to improving the problem of heat accumulation around the working light-emitting element, thereby improving the luminous efficiency of the light-emitting element, and effectively improving the display quality and service life of the display panel.

Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time.

Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

FIG1 is a schematic plan view of a display panel provided by the present invention;

FIG2 is a cross-sectional view of the display panel shown in FIG1 along line A-A';

FIG3 is another cross-sectional view of the display panel shown in FIG1 along line A-A′;

FIG4 is a schematic plan view of another display panel provided by the present invention;

FIG5 is a cross-sectional view of the display panel along line B-B' of FIG4 ;

FIG6 is another cross-sectional view of the display panel along line A-A' of FIG1 ;

FIG7 is a cross-sectional view of the display panel along line C-C' of FIG1 ;

FIG8 is another cross-sectional view of the display panel along line A-A' of FIG1 ;

FIG. 9 is a schematic structural diagram of a display device provided in an embodiment of the present invention.

DETAILED DESCRIPTION

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

FIG1 is a plan schematic diagram of a display panel provided by the present invention, and FIG2 is a cross-sectional diagram of the display panel described in FIG1 along A-A’. Referring to FIG1 and FIG2 , this embodiment provides a display panel, which includes a circuit substrate 10 and a plurality of light-emitting elements 20. The light-emitting elements 20 are located on a side of the circuit substrate 10 facing a light-emitting surface of the display panel, and the light-emitting elements 20 are used to emit light.

The display panel also includes an insulating heat-conducting layer 30, which is located on the side of the circuit substrate 10 facing the light-emitting surface of the display panel, and the insulating heat-conducting layer 30 at least partially surrounds the light-emitting element 20, and the insulating heat-conducting layer 30 is used to dissipate the heat generated by the light-emitting element 20. Among them, the insulating heat-conducting layer 30 has good thermal conductivity, can timely conduct the heat generated by the light-emitting element 20 during operation, and dissipate the heat to the external environment. On the other hand, the insulating heat-conducting layer 30 can also enable the light-emitting element 20 to exchange heat with the lower temperature external environment, thereby improving the problem of too much heat in the light-emitting element 20. Optionally, the insulating heat-conducting layer 30 can be made of a material with good thermal conductivity to better dissipate the heat generated by the light-emitting element 20. Optionally, the insulating heat-conducting layer 30 can be made of a material with a thermal conductivity greater than 100W/(m·K). At the same time, the insulating heat-conducting layer 30 is made of an insulating material to prevent the insulating heat-conducting layer 30 from affecting the signals between the light-emitting elements 20. For example, the insulating heat-conducting layer 30 may be made of materials such as silicon oxide, boron nitride, and boron carbide.

The insulating heat-conducting layer 30 is provided with a hollow portion 31 , and the hollow portion 31 penetrates the insulating heat-conducting layer 30 along a plane perpendicular to the plane where the circuit substrate 10 is located.

The display panel also includes an adjustable unit 40a, and the hollow portion 31 is provided with the adjustable unit 40a, and the thermal conductivity of the adjustable unit 40a is adjustable. When the adjustable unit 40a is not powered on, the thermal conductivity of the adjustable unit 40a is K1, and when the adjustable unit 40a is powered on, the thermal conductivity of the adjustable unit 40a is K2, wherein K2>K1. That is, by providing a voltage signal to the adjustable unit 40a, the thermal conductivity of the adjustable unit 40a is K2, at which time the adjustable unit 40a has good thermal conductivity, and by not providing a voltage signal to the adjustable unit 40a, the thermal conductivity of the adjustable unit 40a is K1, at which time the adjustable unit 40a basically has no thermal conductivity.

Optionally, the material of the adjustable unit 40a is strontium cobalt oxide. Exemplarily, a voltage of 2-4V can be provided to the adjustable unit 40a, at which time, the thermal conductivity of the adjustable unit 40a is 10-50W/mK, and the adjustable unit 40a has good thermal conductivity. When no voltage is provided to the adjustable unit 40a, at this time, the thermal conductivity of the adjustable unit 40a is 0-5W/mK, and the adjustable unit 40a basically has no thermal conductivity.

It should be noted that the present embodiment exemplarily shows that the material of the adjustable unit 40a is strontium cobalt oxide. In other embodiments of the present invention, the adjustable unit 40a may also adopt other materials whose thermal conductivity can be adjusted by voltage. Of course, the adjustable unit 40a may also adopt materials whose thermal conductivity can be adjusted by other means, which will not be elaborated in the present invention.

In the display panel provided in the present embodiment, there is at least one adjustable unit 40a disposed between two adjacent light emitting elements 20, so that the thermal conductivity of the adjustable unit 40a can be adjusted according to the working state of the light emitting element 20 disposed adjacent to the adjustable unit 40a. Exemplarily, when the light emitting elements 20 disposed adjacent to the adjustable unit 40a are both working, the heat of the two light emitting elements 20 will diffuse to the surroundings, thereby causing the heat to gather between the two light emitting elements 20. At this time, the thermal conductivity of the adjustable unit 40a between the two light emitting elements 20 is reduced, so that the adjustable unit 40a can separate the heat generated by the two working light emitting elements 20, avoid the heat from gathering between the two light emitting elements 20, thereby avoiding excessively high local temperature in the display panel, and effectively improving the display quality and service life of the display panel. When only one of the light-emitting elements 20 arranged adjacent to the adjustable unit 40a is working, the thermal conductivity of the adjustable unit 40a between the two light-emitting elements 20 is increased, which is beneficial to the dissipation of heat generated by the working light-emitting element 20 and to improving the problem of heat accumulation around the working light-emitting element 20, thereby improving the luminous efficiency of the light-emitting element 20 and effectively improving the display quality and service life of the display panel.

Continuing to refer to Figures 1 and 2, in some optional embodiments, when the two light-emitting elements 20 adjacent to the adjustable unit 40a are both working, the adjustable unit 40a is not powered on. At this time, the thermal conductivity of the adjustable unit 40a is K1, that is, the thermal conductivity of the adjustable unit 40a is small, and the adjustable unit 40a basically has no thermal conductivity, so that the adjustable unit 40a can isolate the heat generated by the two working light-emitting elements 20 to avoid heat accumulation between the two light-emitting elements 20.

When only one of the two light-emitting elements 20 adjacent to the adjustable unit 40a is working, the adjustable unit 40a is powered on. At this time, the thermal conductivity of the adjustable unit 40a is K2, that is, the thermal conductivity of the adjustable unit 40a is large. The adjustable unit 40a has good thermal conductivity, which is beneficial to the dissipation of heat generated by the working light-emitting element 20 and improves the heat dissipation efficiency.

It is understandable that when the light-emitting element 20 in the embodiment of the present invention is applied to the backlight module of the liquid crystal display panel, the circuit substrate 10 is the circuit substrate in the backlight module, and the panel in the liquid crystal display panel is arranged on the light-emitting side of the backlight module. In addition, the light-emitting element 20 in the embodiment of the present invention can also directly display light. For example, the plurality of light-emitting elements 20 may include a plurality of light-emitting elements with different light-emitting colors. Exemplarily, the light-emitting element 20 may include a red light-emitting element, a blue light-emitting element, and a green light-emitting element. In some optional embodiments, the light-emitting element 20 may also include a white light-emitting element or a yellow light-emitting element.

In some optional embodiments, the light emitting element 20 may be a Mini-LED (sub-millimeter light emitting diode) or a Micro-LED (micro light emitting diode). Optionally, by arranging the light emitting elements 20 in an array on the circuit substrate 10, the number of the light emitting elements 20 can be increased, thereby increasing the light emitting brightness of the display panel and improving the light emitting effect of the display panel.

It should be noted that this embodiment exemplarily shows that the light-emitting element 20 is Mini-LED or Micro-LED. In other embodiments of the present invention, the light-emitting element 20 may also be other types of LED chips, which will not be described in detail herein.

Continuing to refer to FIG. 1 and FIG. 2, in some optional embodiments, a plurality of light emitting elements 20 are arranged in an array along a first direction X and a second direction Y, and the first direction X and the second direction Y intersect, so as to facilitate the zoning control of the light emitting elements 20, for example, the light emitting elements 20 arranged in the array are divided into a plurality of dimming zones, so as to facilitate the control of the light emitting brightness of each dimming zone. Optionally, the first direction X and the second direction Y are perpendicular to each other.

At least one adjustable unit 40a may be provided between two adjacent light-emitting elements 20 arranged along the first direction X, so that the thermal conductivity of the adjustable unit 40a can be adjusted according to the working state of the light-emitting element 20 arranged adjacent to the adjustable unit 40a along the first direction X, which is beneficial to improving the problem of heat accumulation between the light-emitting elements 20 arranged along the first direction X.

Similarly, at least one adjustable unit 40a may be provided between two adjacent light-emitting elements 20 arranged along the second direction Y, so that the thermal conductivity of the adjustable unit 40a can be adjusted according to the working state of the light-emitting element 20 arranged adjacent to the adjustable unit 40a along the second direction Y, which is beneficial to improving the problem of heat accumulation between the light-emitting elements 20 arranged along the second direction Y.

The adjustable units 40a are insulated from each other, and each adjustable unit 40a can provide a voltage signal independently, so that whether to provide a voltage signal to each adjustable unit 40a can be controlled according to the working conditions of each light-emitting element 20 in the display panel, which is beneficial to improving the problem of heat accumulation in the display panel.

In some optional embodiments, the display panel further includes a circuit structure (not shown) electrically connected to the adjustable unit 40a, and a voltage signal is provided to each adjustable unit 40a through the circuit structure. The circuit structure may include a signal line and a control circuit. Optionally, the circuit structure electrically connected to the adjustable unit 40a may be configured by reusing a film layer in a wiring structure electrically connected to the light-emitting element 20, thereby facilitating the reduction of process steps, reducing production costs, and at the same time, facilitating the reduction of the thickness of the display panel.

It should be noted that the present embodiment exemplarily shows that an adjustable unit 40a is provided between two adjacent light-emitting elements 20 arranged along the first direction X, and an adjustable unit 40a is also provided between two adjacent light-emitting elements 20 arranged along the second direction Y. In other embodiments of the present invention, some of the adjacent light-emitting elements 20 arranged along the first direction X may not be provided with an adjustable unit 40a, and some of the adjacent light-emitting elements 20 arranged along the second direction Y may not be provided with an adjustable unit 40a. The setting of the adjustable unit 40a can be set according to actual needs, and the present invention will not be repeated here one by one.

Continuing to refer to Figures 1 and 2, in some optional embodiments, along the plane perpendicular to the circuit substrate 10, the height of the adjustable unit 40a is equal to the height of the insulating thermal conductive layer 30, so that the insulating thermal conductive layer 30 around the two adjacent light-emitting elements 20 can be separated by the adjustable unit 40a, which is beneficial to controlling the conduction and isolation of heat between the two adjacent light-emitting elements 20 through the adjustable unit 40a.

Specifically, when the two light emitting elements 20 adjacent to the adjustable unit 40a are both working, the thermal conductivity of the adjustable unit 40a is small, and the adjustable unit 40a basically has no thermal conductivity, so that the adjustable unit 40a can separate the heat generated by the two working light emitting elements 20 to avoid heat accumulation. Therefore, along the plane perpendicular to the circuit substrate 10, the height of the adjustable unit 40a is equal to the height of the insulating heat-conducting layer 30, and the adjustable unit 40a is conducive to separating the insulating heat-conducting layer 30 around the two adjacent light emitting elements 20, thereby facilitating the separation of the heat generated by the two working light emitting elements 20 to avoid heat accumulation.

When only one of the two light-emitting elements 20 adjacent to the adjustable unit 40a is working, the thermal conductivity of the adjustable unit 40a is relatively large, and the adjustable unit 40a has good thermal conductivity, so that the adjustable unit 40a can transfer the heat generated by the working light-emitting element 20 to the insulating heat-conducting layer 30 around the adjacent light-emitting element 20, increase the heat dissipation area, facilitate the dissipation of the heat generated by the working light-emitting element 20, and improve the heat dissipation efficiency. Therefore, along the plane perpendicular to the circuit substrate 10, the height of the adjustable unit 40a is equal to the height of the insulating heat-conducting layer 30, and the adjustable unit 40a is conducive to the dissipation of the heat generated by the working light-emitting element 20, avoiding heat accumulation.

Similarly, referring to FIG3 , FIG3 is another cross-sectional view of the display panel described in FIG1 along A-A’. Along the plane perpendicular to the circuit substrate 10, the height of the adjustable unit 40a may also be greater than the height of the insulating thermal conductive layer 30, which may also be beneficial for controlling the conduction and isolation of heat between two adjacent light-emitting elements 20 through the adjustable unit 40a. The present invention will not be elaborated here.

Continuing to refer to FIG. 1 and FIG. 2 , in some optional embodiments, the vertical projection of at least one adjustable unit 40a on the circuit substrate 10 is the same as the vertical projection of the hollow portion 31 on the circuit substrate 10. That is, the adjustable unit 40a is disposed in the hollow portion 31, and the adjustable unit 40a contacts the side wall of the hollow portion 31 in the insulating heat-conductive layer 30, so that the insulating heat-conductive layer 30 around the two adjacent light-emitting elements 20 can be separated by the adjustable unit 40a, which is conducive to controlling the conduction and isolation of heat between the two adjacent light-emitting elements 20 by the adjustable unit 40a.

Specifically, when the two light-emitting elements 20 adjacent to the adjustable unit 40a are both working, the thermal conductivity of the adjustable unit 40a is small, and the adjustable unit 40a basically has no thermal conductivity, so that the adjustable unit 40a can separate the heat generated by the two working light-emitting elements 20 to avoid heat accumulation. Therefore, the adjustable unit 40a contacts the side wall of the hollow portion 31 in the insulating heat-conducting layer 30, which is conducive to the adjustable unit 40a separating the insulating heat-conducting layer 30 around the two adjacent light-emitting elements 20, thereby facilitating the separation of the heat generated by the two working light-emitting elements 20 and avoiding heat accumulation.

When only one of the two light-emitting elements 20 adjacent to the adjustable unit 40a is working, the thermal conductivity of the adjustable unit 40a is relatively large, the adjustable unit 40a has good thermal conductivity, and the adjustable unit 40a is in contact with the side wall of the hollow portion 31 in the insulating thermal conductive layer 30, so that the adjustable unit 40a can transfer the heat generated by the working light-emitting element 20 to the insulating thermal conductive layer 30 around the adjacent light-emitting element 20, thereby increasing the heat dissipation area, which is beneficial to the dissipation of the heat generated by the working light-emitting element 20 and improving the heat dissipation efficiency.

Continuing to refer to Figures 1 and 2, in some optional embodiments, along the plane perpendicular to the circuit substrate 10, the height of the adjustable unit 40a is equal to the height of the insulating heat-conducting layer 30, and the vertical projection of the adjustable unit 40a on the circuit substrate 10 is the same as the vertical projection of the hollow portion 31 on the circuit substrate 10, that is, the structure of the adjustable unit 40a is exactly the same as the structure of the hollow portion 31. The insulating heat-conducting layer 30 around the two adjacent light-emitting elements 20 is separated by the adjustable unit 40a, which is beneficial for controlling the conduction and isolation of heat between the two adjacent light-emitting elements 20 through the adjustable unit 40a. At the same time, a flat substrate can be provided for the subsequent setting of the film layer located on the side of the light-emitting element 20 away from the circuit substrate 10, which is beneficial for the subsequent setting of the film layer located on the side of the light-emitting element 20 away from the circuit substrate 10.

Fig. 4 is a plan schematic diagram of another display panel provided by the present invention, and Fig. 5 is a cross-sectional diagram of the display panel described in Fig. 4 along B-B’. Referring to Fig. 4 and Fig. 5, in some optional embodiments, the display panel is a spliced display panel, and the circuit substrate 10 includes a plurality of first sub-substrates 11, and at least one adjustable unit 40b is provided between two adjacent first sub-substrates 11, so that the thermal conductivity of the adjustable unit 40b can be adjusted according to the working state of the light-emitting element 20 on the first sub-substrate 11 adjacent to the adjustable unit 40b, which is beneficial to improving the problem of heat accumulation on the first sub-substrate 11, thereby improving the luminous efficiency of the light-emitting element 20 on the first sub-substrate 11, and effectively improving the display quality and service life of the display panel.

Continuing to refer to Figures 4 and 5, in some optional embodiments, when the light-emitting elements 20 are present on the two first sub-substrates 11 adjacent to the adjustable unit 40b, the adjustable unit 40b is not powered on. At this time, the thermal conductivity of the adjustable unit 40b is K1, that is, the thermal conductivity of the adjustable unit 40b is small, and the adjustable unit 40b basically has no thermal conductivity, so that the adjustable unit 40b can isolate the heat generated by the light-emitting elements 20 on the two first sub-substrates 11 to avoid heat accumulation.

When only one of the two first sub-substrates 11 adjacent to the adjustable unit 40b has a light-emitting element 20 in operation, the adjustable unit 40b is powered on. At this time, the thermal conductivity of the adjustable unit 40b is K2, that is, the thermal conductivity of the adjustable unit 40b is large. The adjustable unit 40b has good thermal conductivity, which is beneficial to the dissipation of heat generated by the working light-emitting element 20 and improves the heat dissipation efficiency.

FIG6 is another cross-sectional view of the display panel described in FIG1 along A-A’. Referring to FIG1 and FIG6 , in some optional embodiments, the insulating heat-conductive layer 30 is at least partially located between the light-emitting element 20 and the circuit substrate 10, and the vertical projection of the light-emitting element 20 on the circuit substrate 10 partially overlaps with the vertical projection of the insulating heat-conductive layer 30 on the circuit substrate 10, that is, the insulating heat-conductive layer 30 is partially located between the light-emitting element 20 and the circuit substrate 10. The insulating heat-conductive layer 30 can separate the light-emitting element 20 from the circuit substrate 10, and dissipate the heat of the side of the light-emitting element 20 close to the circuit substrate 10 to the external environment, so as to improve the problem that a large amount of heat of the light-emitting element 20 is accumulated on the side of the light-emitting element 20 close to the circuit substrate 10 and is conducted to the circuit substrate 10, thereby improving the luminous efficiency of the light-emitting element 20, and improving the stability and performance of each device in the circuit substrate 10, and effectively improving the display quality and service life of the display panel.

FIG7 is a cross-sectional view of the display panel along C-C' described in FIG1. Referring to FIG1 and FIG7, in some optional embodiments, the circuit substrate 10 includes a substrate 11 and a wiring structure 12 located on a side of the substrate 11 close to the insulating heat-conducting layer 30. The light-emitting element 20 is electrically connected to the wiring structure 12 through a via F. The wiring structure 12 transmits an electrical signal to the light-emitting element 20, so that the light-emitting element 20 can emit light. Optionally, the wiring structure 12 may include a control circuit, and the control circuit may include a thin film transistor T. The thin film transistor T may be used as a driving tube for driving the corresponding light-emitting element 20. The light-emitting element 20 is electrically connected to the thin film transistor T through the via F.

The vertical projection of the via F on the circuit substrate 10 does not overlap with the vertical projection of the insulating thermal conductive layer 30 on the circuit substrate 10, that is, the via F passes through the insulating thermal conductive layer 30, and the portion of the insulating thermal conductive layer 30 located between the light-emitting element 20 and the circuit substrate 10 serves to dissipate the heat of the light-emitting element 20 on the side close to the circuit substrate 10 to the external environment, while not affecting the electrical connection between the light-emitting element 20 and the wiring structure 12.

Optionally, since the insulating thermally conductive layer 30 is made of insulating material, an insulating thermally conductive layer 30 may be provided between the remaining areas of the side of the light-emitting element 20 close to the circuit substrate 10, except for the area corresponding to the via F used for electrical connection with the wiring structure 12. This is beneficial to increase the setting area of the insulating thermally conductive layer 30 between the light-emitting element 20 and the circuit substrate 10, and is further beneficial to dissipate the heat of the side of the light-emitting element 20 close to the circuit substrate 10 to the external environment, further improving the problem of a large amount of heat from the light-emitting element 20 being accumulated on the side of the light-emitting element 20 close to the circuit substrate 10 and being conducted to the circuit substrate 10.

It should be noted that FIG. 7 exemplarily shows that the light emitting element 20 is a horizontal LED chip. In other embodiments of the present invention, the light emitting element 20 may also be a vertical LED chip, which will not be described in detail herein.

Continuing to refer to FIG. 1 and FIG. 6 , in some optional embodiments, a plurality of grooves 32 are provided on the side of the insulating heat-conducting layer 30 away from the circuit substrate 10, and the grooves 32 are recessed toward the direction close to the circuit substrate 10. The light-emitting elements 20 correspond to the grooves 32 one by one, and the light-emitting elements 20 are located in the grooves 32 corresponding thereto. On the plane perpendicular to the circuit substrate 10, the height of the grooves 32 is less than the height of the insulating heat-conducting layer 30, so that when the light-emitting element 20 is arranged in the grooves 32 corresponding thereto, part of the insulating heat-conducting layer 30 is located between the light-emitting element 20 and the circuit substrate 10. Moreover, part of the insulating heat-conducting layer 30 is located between two adjacent light-emitting elements 20, and the part of the insulating heat-conducting layer 30 located between the light-emitting element 20 and the circuit substrate 10 can conduct the heat of the side of the light-emitting element 20 close to the circuit substrate 10 to the part of the insulating heat-conducting layer 30 located between the two adjacent light-emitting elements 20, which is conducive to dissipating the heat of the side of the light-emitting element 20 close to the circuit substrate 10 to the external environment. The insulating heat-conductive layer 30 at least surrounds the sides of the light-emitting element 20 , which is beneficial for dissipating the heat generated by the light-emitting element 20 during operation to the external environment, thereby further improving the light-emitting efficiency of the light-emitting element 20 .

It should be noted that, on a plane perpendicular to the circuit substrate 10 , the height of the insulating thermally conductive layer 30 refers to the height of a portion of the insulating thermally conductive layer 30 that does not overlap with the light emitting element 20 on the plane perpendicular to the circuit substrate 10 .

Continuing to refer to FIG. 1 and FIG. 6 , in some optional embodiments, on a plane perpendicular to the circuit substrate 10, the depth of the groove 32 is greater than or equal to the height of the light-emitting element 20. When on a plane perpendicular to the circuit substrate 10, the depth of the groove 32 is greater than the height of the light-emitting element 20, the insulating heat-conductive layer 30 surrounds the side surfaces of the light-emitting element 20, which is conducive to dissipating the heat generated during the operation of the light-emitting element 20 from the surroundings of the light-emitting element 20 to the external environment, thereby improving the luminous efficiency of the light-emitting element 20. When on a plane perpendicular to the circuit substrate 10, the depth of the groove 32 is equal to the height of the light-emitting element 20, that is, on a plane perpendicular to the circuit substrate 10, the height of the groove 32 is the same as the height of the light-emitting element 20, and the side surfaces of the light-emitting element 20 are surrounded by the insulating heat-conductive layer 30, which is further conducive to dissipating the heat generated during the operation of the light-emitting element 20 from the surroundings of the light-emitting element 20 to the external environment, thereby further improving the luminous efficiency of the light-emitting element 20. Moreover, the surface of the light-emitting element 20 away from the circuit substrate 10 and the surface of the insulating heat-conductive layer 30 away from the circuit substrate 10 are located in the same plane, providing a flat base for the subsequent arrangement of the film layer located on the side of the light-emitting element 20 away from the circuit substrate 10, which is beneficial to the subsequent arrangement of the film layer located on the side of the light-emitting element 20 away from the circuit substrate 10.

FIG8 is another cross-sectional view of the display panel along A-A' described in FIG1. Referring to FIG1 and FIG8, in some optional embodiments, a transparent heat-conducting portion 50 is provided on the side of the light-emitting element 20 away from the circuit substrate 10, and the vertical projection of the light-emitting element 20 on the circuit substrate 10 is located within the vertical projection of the transparent heat-conducting portion 50 on the circuit substrate 10. That is, the transparent heat-conducting portion 50 covers the surface of the light-emitting element 20 away from the circuit substrate 10, and the transparent heat-conducting portion 50 is used to dissipate the heat of the light-emitting element 20 away from the circuit substrate 10, thereby improving the luminous efficiency of the light-emitting element 20. Among them, the transparent heat-conducting portion 50 has good thermal conductivity, and can timely conduct the heat generated by the light-emitting element 20 during operation, and dissipate the heat to the external environment. On the other hand, the transparent heat-conducting portion 50 can also enable the light-emitting element 20 to exchange heat with the external environment at a lower temperature, thereby improving the problem of more heat in the light-emitting element 20. Optionally, the transparent heat-conducting portion 50 can be made of a material with good thermal conductivity to better dissipate the heat generated by the light-emitting element 20. Optionally, the transparent heat-conducting portion 50 may be made of a material having a thermal conductivity greater than 100 W/(m·K). At the same time, the transparent heat-conducting portion 50 is made of a transparent material to reduce the effect of the transparent heat-conducting portion 50 on the luminous brightness of the light-emitting element 20. Exemplarily, the transparent heat-conducting portion 50 may be made of silicon oxide, boron nitride, silicon carbide, and the like.

This embodiment provides a display device, including the display panel as described above.

Please refer to Figure 9, which is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. The display device 1000 provided in Figure 9 includes a display panel 100 provided in any of the above embodiments of the present invention. The embodiment of Figure 9 only takes a mobile phone as an example to illustrate the display device 1000. It can be understood that the display device provided in the embodiment of the present invention can be a computer, a television, a car display device or other display device with a display function, and the present invention does not impose specific restrictions on this. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention. For details, please refer to the specific description of the display panel in the above embodiments, and this embodiment will not be repeated here.

It can be seen from the above embodiments that the display panel and the display device provided by the present invention achieve at least the following beneficial effects:

In the display panel provided by the present invention, the insulating heat-conducting layer is provided with a hollow portion, and the hollow portion penetrates the insulating heat-conducting layer along a plane perpendicular to the circuit substrate. The display panel also includes an adjustable unit, and the adjustable unit is provided in the hollow portion, and the thermal conductivity of the adjustable unit is adjustable. Among them, when the adjustable unit is not powered on, the thermal conductivity of the adjustable unit is K1, and when the adjustable unit is powered on, the thermal conductivity of the adjustable unit is K2, wherein K2>K1. That is, by providing a voltage signal to the adjustable unit, the thermal conductivity of the adjustable unit is K2, at this time, the adjustable unit has good thermal conductivity, and by not providing a voltage signal to the adjustable unit, the thermal conductivity of the adjustable unit is K1, at this time, the adjustable unit basically has no thermal conductivity. In the display panel provided by the present invention, there is at least one adjustable unit provided between two adjacent light-emitting elements, so that the thermal conductivity of the adjustable unit can be adjusted according to the working state of the light-emitting element arranged adjacent to the adjustable unit. Exemplarily, when the light-emitting elements arranged adjacent to the adjustable unit are both working, the heat of the two light-emitting elements will diffuse to the surroundings, thereby causing heat to accumulate between the two light-emitting elements. At this time, the thermal conductivity of the adjustable unit between the two light-emitting elements is reduced, so that the adjustable unit can separate the heat generated by the two working light-emitting elements, avoiding the heat from accumulating between the two light-emitting elements, thereby avoiding excessive local temperature in the display panel, and effectively improving the display quality and service life of the display panel. When only one of the light-emitting elements arranged adjacent to the adjustable unit is working, at this time, the thermal conductivity of the adjustable unit between the two light-emitting elements is increased, which is conducive to the dissipation of the heat generated by the working light-emitting element, and is conducive to improving the problem of heat accumulation around the working light-emitting element, thereby improving the luminous efficiency of the light-emitting element, and effectively improving the display quality and service life of the display panel.

Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims (14)

1. A display panel, comprising: Circuit substrate; A plurality of light emitting elements, wherein the light emitting elements are located on a side of the circuit substrate facing a light emitting surface of the display panel; an insulating heat-conductive layer, the insulating heat-conductive layer being located on a side of the circuit substrate facing the light-emitting surface of the display panel, and the insulating heat-conductive layer at least partially surrounds the light-emitting element, and the insulating heat-conductive layer is provided with a hollow portion, and the hollow portion penetrates the insulating heat-conductive layer along a plane perpendicular to the circuit substrate; An adjustable unit, wherein the hollow portion is provided with the adjustable unit; There is at least one adjustable unit disposed between two adjacent light-emitting elements; When the adjustable unit is not powered on, the thermal conductivity of the adjustable unit is K1, and when the adjustable unit is powered on, the thermal conductivity of the adjustable unit is K2, wherein K2>K1. 2. The display panel according to claim 1, characterized in that: When the two light-emitting elements adjacent to the adjustable unit are both working, the adjustable unit is not powered; When only one of the two light emitting elements adjacent to the adjustable unit is working, the adjustable unit is powered on. 3. The display panel according to claim 1, characterized in that: The plurality of light emitting elements are arranged in an array along a first direction and a second direction, and the first direction and the second direction intersect; At least one of the adjustable units is disposed between two adjacent light emitting elements arranged along the first direction, and/or at least one of the adjustable units is disposed between two adjacent light emitting elements arranged along the second direction; The adjustable units are insulated from each other. 4. The display panel according to claim 1, characterized in that: The material of the adjustable unit is strontium cobalt oxide. 5. The display panel according to claim 1, characterized in that: Along a plane perpendicular to the circuit substrate, the height of the adjustable unit is greater than or equal to the height of the insulating heat-conducting layer. 6. The display panel according to claim 1, characterized in that: A vertical projection of at least one of the adjustable units on the circuit substrate is the same as a vertical projection of the hollow portion on the circuit substrate. 7. The display panel according to claim 1, characterized in that: The circuit substrate includes a plurality of first sub-substrates, and at least one adjustable unit is disposed between two adjacent first sub-substrates. 8. The display panel according to claim 7, characterized in that: When the light emitting elements on the two first sub-substrates adjacent to the adjustable unit are both in operation, the adjustable unit is not powered; When the light emitting element is in operation on only one of the two first sub-substrates adjacent to the adjustable unit, the adjustable unit is powered on. 9. The display panel according to claim 1, characterized in that: The insulating heat-conducting layer is at least partially located between the light-emitting element and the circuit substrate; The vertical projection of the light emitting element on the circuit substrate partially overlaps with the vertical projection of the insulating heat-conductive layer on the circuit substrate. 10. The display panel according to claim 9, characterized in that: A plurality of grooves are provided on a side of the insulating heat-conducting layer away from the circuit substrate, and the grooves are recessed toward a direction close to the circuit substrate; The light emitting elements correspond to the grooves one by one, and the light emitting elements are located in the corresponding grooves. 11. The display panel according to claim 10, characterized in that: On a plane perpendicular to the circuit substrate, the depth of the groove is greater than or equal to the height of the light emitting element. 12. The display panel according to claim 1, characterized in that: A transparent heat-conducting portion is provided on a side of the light-emitting element away from the circuit substrate, and a vertical projection of the light-emitting element on the circuit substrate is located within a vertical projection of the transparent heat-conducting portion on the circuit substrate. 13. The display panel according to claim 1, characterized in that: The light-emitting element is Mini-LED or Micro-LED. 14. A display device, characterized in that the display device comprises the display panel according to any one of claims 1-13.