Display panel and display device
By staggering the main screen and rear screen display modules in the OLED display device and using heat insulation and heat conduction layer design, the problems of display abnormalities and shortened lifespan caused by overheating of the rear screen are solved, achieving better heat dissipation and display quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-03-27
AI Technical Summary
In the current design of OLED mobile phones with integrated back screen and main screen, the small display area of the back screen and its high integration with modules such as cameras lead to high power consumption and uneven heat dissipation. Overheating of the back screen affects the lifespan of its own light-emitting layer and is conducted to the main screen, resulting in display abnormalities and shortened lifespan.
By adopting a staggered arrangement of the main screen display module and the rear screen display module, combined with the design of heat insulation layer and heat conduction layer, the heat conduction path of the rear screen light-emitting unit is isolated, and heat is evenly distributed through phase change material and heat dissipation layer to reduce the impact of thermal effect on the main screen.
It effectively reduces the direct heat transfer path from the rear screen to the main screen, avoiding display abnormalities and shortened lifespan of the main screen, and improving display quality and service life.
Smart Images
Figure CN121751909A_ABST
Abstract
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] Organic light emitting diode (OLED) has the advantages of surface light source, cold light, energy saving, fast response, flexibility, ultra-thin, low cost and mature mass production technology. OLED mobile phone back screen has many benefits, such as improving operation convenience, enhancing the shooting experience, meeting individual needs, increasing interesting play and realizing ecological linkage.
[0003] However, in the existing OLED mobile phone back screen and main screen integrated design, the back screen area is small in display area and highly integrated with camera modules, resulting in high power consumption and uneven heat dissipation. The overheating of the back screen not only affects the service life of the light-emitting layer itself, but also causes the display abnormality and service life shortening of the main screen due to the heat conduction to the corresponding area of the main screen. In addition, the heat conduction of the power module of the main screen and the back screen aggravates the regional heating problem of the main screen, which long-term affects the display quality and service life of the product. SUMMARY
[0004] The display panel and the display device provided by the present application aim to solve the problem of display abnormality and service life shortening caused by overheating of the back screen in the existing display device with a back screen.
[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a display panel, comprising: A main screen display module, comprising a first driving substrate and a first display substrate arranged on one side of the first driving substrate; the first display substrate comprises a plurality of first light-emitting units arranged in an array; A back screen display module arranged on the side of the first driving substrate away from the first display substrate; the back screen display module comprises a second driving substrate and a second display substrate arranged on the surface of the second driving substrate away from the first driving substrate; the second display substrate comprises a plurality of second light-emitting units arranged in an array; Wherein, the plurality of second light-emitting units are arranged in a staggered manner with the plurality of first light-emitting units.
[0006] In a specific embodiment, the first display substrate further comprises a first pixel definition layer arranged on the surface of the first driving substrate; the first pixel definition layer protrudes from the first driving substrate and surrounds to form a plurality of first pixel containing areas; the first light-emitting unit is arranged in the first pixel containing area; The second display substrate further comprises a second pixel definition layer disposed on the surface of the second driving substrate; the second pixel definition layer protrudes from the second driving substrate and forms a plurality of second pixel accommodating areas; and the second light emitting unit is disposed in the second pixel accommodating area. The second light emitting unit is disposed corresponding to at least part of the first pixel definition layer, and the axis of the second light emitting unit coincides with the axis of the corresponding first pixel definition layer.
[0007] In an embodiment, the distance between two adjacent second light emitting units is equal to n times the distance between two adjacent first pixel definition layers; n is a positive integer greater than or equal to 1.
[0008] In an embodiment, the back screen display module further comprises: A first thermal insulation layer is disposed between the second light emitting unit and the second driving substrate to insulate the heat generated by the second light emitting unit; the first thermal insulation layer is a porous thermal insulation layer.
[0009] In an embodiment, the second light emitting unit comprises an anode layer, a light emitting layer and a cathode layer which are sequentially stacked in a direction away from the first thermal insulation layer. The width of the first thermal insulation layer is greater than the width of the anode layer; and in a direction parallel to the display panel, the circumferential edge of the first thermal insulation layer protrudes from the circumferential edge of the anode layer.
[0010] In an embodiment, the width of the part of the first thermal insulation layer protruding from the anode layer is greater than or equal to 1 micrometer and less than or equal to 3 micrometers. The thickness of the first thermal insulation layer is greater than or equal to 1 micrometer and less than or equal to 1.5 micrometers.
[0011] In an embodiment, the second display substrate further comprises: A first thermal conductive layer is disposed on the surface of the second pixel definition layer and separates the light emitting layer and the second pixel definition layer, and the cathode layer and the second pixel definition layer; A second thermal conductive layer is disposed on the surface of the cathode layer away from the light emitting layer; A thermal conductive via is disposed on the second pixel definition layer; the thermal conductive via penetrates the cathode layer and connects the first thermal conductive layer and the second thermal conductive layer.
[0012] In an embodiment, the first thermal conductive layer is an insulating thermal conductive layer; the first thermal conductive layer comprises nanocrystalline aluminum nitride; and the thickness of the first thermal conductive layer is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer. The second heat-conductive layer is a transparent conductive heat-conductive layer; the second heat-conductive layer comprises graphene; and the thickness of the second heat-conductive layer is greater than or equal to 0.5 microns and less than or equal to 1 micron.
[0013] To solve the above technical problems, another technical solution adopted by the present application is to provide a display device, comprising: a display panel; the display panel is any of the display panels involved in the above; a first power module for supplying power to the main screen display module of the display panel; a second power module arranged on one side of the first power module for supplying power to the back screen display module of the display panel; a second thermal insulation layer arranged between the first power module and the second power module; the second thermal insulation layer is a porous thermal insulation layer.
[0014] In a specific embodiment, further comprising: a first phase change layer arranged between the first power module and the second thermal insulation layer; a second phase change layer arranged between the second power module and the second thermal insulation layer; a heat dissipation layer arranged between the first power module and the second power module; the heat dissipation layer has a microchannel therein, and the two ends of the microchannel are respectively connected to the first phase change layer and the second phase change layer; and the microchannel is located at the circumferential periphery of the second power module; wherein the second phase change layer can be melted by heat and flow along the microchannel to be connected to the heat dissipation layer and / or the first phase change layer.
[0015] The embodiment of the present application has the beneficial effects that: the embodiment of the present application provides a display panel and a display device; the display panel comprises a main screen display module and a back screen display module. The main screen display module comprises a first driving substrate and a first display substrate arranged on one side of the first driving substrate; the first display substrate comprises a plurality of first light emitting units arranged in an array. The back screen display module is arranged on the side of the first driving substrate away from the first light emitting units; the back screen display module comprises a second driving substrate and a second display substrate arranged on the surface of the second driving substrate away from the first driving substrate; the second display substrate comprises a plurality of second light emitting units arranged in an array. The plurality of second light emitting units are arranged in a staggered manner with the plurality of first light emitting units. The second light emitting units in the back screen display module are arranged in a staggered manner with the first light emitting units in the main screen display module, so as to eliminate the heat conduction path of the heat generated by the self-light emitting thermal effect of the second light emitting units directly to the first light emitting units on the main screen display module, reduce the thermal effect of the second light emitting units of the back screen display module on the first light emitting units of the main screen display module, and avoid the situation that the first light emitting units in the main screen display module are affected by long-term high temperature, resulting in display abnormalities and shortened service life. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 A structural diagram of a display panel provided by the first embodiment of the present application is shown in the figure. Figure 2 A structural diagram of a display panel provided by the first embodiment of the present application is shown in the figure. Figure 1 A structural diagram of a display panel provided by the first embodiment of the present application is shown in the figure. Figure 3 A structural diagram of a display panel provided by the first embodiment of the present application is shown in the figure. Figure 4 A structural diagram of a display panel provided by the first embodiment of the present application is shown in the figure. Figure 5 A structural diagram of a display panel provided by the first embodiment of the present application is shown in the figure. Figure 4 A structural diagram of a display panel provided by the first embodiment of the present application is shown in the figure. Figure 6 A structural diagram of a display panel provided by the first embodiment of the present application is shown in the figure.
[0017] BRIEF DESCRIPTION OF DRAWINGS 10 - display panel; 20 - first power module; 30 - second power module; 40 - second thermal insulation layer; 50 - first phase change layer; 60 - second phase change layer; 70 - heat dissipation layer; 701 - microchannel; 1 - main screen display module; 2 - back screen display module; 11 - first driving substrate; 12 - first display substrate; 21 - second driving substrate; 22 - second display substrate; 23 - first thermal insulation layer; 121 - first light emitting unit; 122 - first pixel definition layer; 221 - second light emitting unit; 222 - second pixel definition layer; 223 - first heat conduction layer; 224 - second heat conduction layer; 225 - heat conduction via; 2211 - anode layer; 2212 - light emitting layer; 2213 - cathode layer. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0019] The terms "first", "second", "third" in the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.
[0020] In this document, the term "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean that the same embodiment is referred to, nor does it mean that independent or alternative embodiments are mutually exclusive of other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0021] The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0022] Reference is made to Figure 1 , Figure 1 The structural diagram of the display panel provided by the first embodiment of the present application is shown in the figure. Figure 2 For Figure 1 The structural cross-sectional view of the display panel shown in the figure; the first embodiment of the present application provides a display panel 10 suitable for a display device with a back screen. The display panel 10 can include a main screen display module 1 and a back screen display module 2.
[0023] The main screen display module 1 can include a first driving substrate 11 and a first display substrate 12 disposed on one side of the first driving substrate 11. The first driving substrate 11 has opposite first and second surfaces, and the first display substrate 12 is disposed on the first surface of the first driving substrate 11; wherein the first driving substrate 11 is used to transmit signals to the first display substrate 12 to control the first display substrate 12 to display a picture.
[0024] The first display substrate 12 includes a plurality of first light emitting units 121 arranged in an array. The first light emitting units 121 can specifically include light emitting units of different colors, such as red, green and blue light emitting units, to achieve color display; specifically, the light emitting color of the first light emitting units 121 is determined by the light emitting color of the organic light emitting layer 2212. Alternatively, in some other embodiments, the first light emitting units 121 can also be light emitting units of the same color, such as white, red, green, blue or other colors, which can be specifically set according to actual needs; for example, the first light emitting units 121 are white, and the brightness of the first light emitting units 121 is controlled to achieve gray scale display, and a color resistance layer can also be added above the first light emitting units 121 to achieve color display. For example, the first light emitting units 121 are blue, and a red quantum dot layer can also be added above part of the first light emitting units 121, and a green quantum dot layer can also be added above part of the first light emitting units 121 to achieve color display.
[0025] The back screen display module 2 is disposed on the second surface of the first driving substrate 11 away from the first light emitting units 121. The back screen display module 2 can include a second driving substrate 21 and a second display substrate 22 disposed on the surface of the second driving substrate 21 away from the first driving substrate 11. Specifically, the second driving substrate 21 has opposite third and fourth surfaces, the third surface is the surface of the second driving substrate 21 away from the first driving substrate 11, and the fourth surface is the surface of the second driving substrate 21 facing the first driving substrate 11; the second display substrate 22 is disposed on the third surface.
[0026] The second display substrate 22 may include a plurality of second light-emitting units 221 arranged in an array; the second light-emitting units 221 may also include light-emitting units with different light-emitting colors.
[0027] In this configuration, multiple second light-emitting units 221 are staggered with multiple first light-emitting units 121. It should be noted that the staggered arrangement of the second light-emitting units 221 and the first light-emitting units 121 means that the projection of the second light-emitting unit 221 onto the first driving substrate 11 in a direction perpendicular to the display panel 10 does not completely coincide with the projection of the first light-emitting unit 121 onto the first driving substrate 11 in the same direction perpendicular to the display panel 10. Specifically, their projections may only partially overlap or may not overlap at all.
[0028] By misaligning the second light-emitting unit 221 in the rear screen display module 2 with the first light-emitting unit 121 in the main screen display module 1, the heat generated by the self-luminous thermal effect of the second light-emitting unit 221 is directly conducted to the first light-emitting unit 121 on the main screen display module 1, thereby reducing the thermal effect of the second light-emitting unit 221 in the rear screen display module 2 on the first light-emitting unit 121 in the main screen display module 1 and avoiding the occurrence of display abnormalities and shortened lifespan of the first light-emitting unit 121 in the main screen display module 1 due to long-term high temperature.
[0029] like Figure 2 As shown, in a specific embodiment, the first display substrate 12 further includes a first pixel definition layer 122 disposed on the surface of the first driving substrate 11. Specifically, the first pixel definition layer 122 is disposed on the first surface of the first driving substrate 11, and the first pixel definition layer 122 protrudes from the first driving substrate 11 and surrounds a plurality of first pixel accommodating regions (not shown); a plurality of first light-emitting units 121 are respectively disposed in the plurality of first pixel accommodating regions.
[0030] The second display substrate 22 further includes a second pixel definition layer 222 disposed on the surface of the second driving substrate 21. Specifically, the second pixel definition layer 222 is disposed on the third surface of the second driving substrate 21, and the second pixel definition layer 222 protrudes from the second driving substrate 21 and surrounds and forms a plurality of second pixel receiving areas (not shown); and a plurality of second light-emitting units 221 are respectively disposed in the second pixel receiving areas.
[0031] The second light emitting unit 221 is arranged corresponding to at least part of the first pixel definition layer 122, and the axis of the second light emitting unit 221 coincides with the axis of the corresponding first pixel definition layer 122. It can be understood that when the axis of the second light emitting unit 221 coincides with the axis of the corresponding first pixel definition layer 122, the overlapping area of the second light emitting unit 221 and the first pixel definition layer 122 is the largest, so as to minimize the overlapping area of the second light emitting unit 221 and the first light emitting unit 121, thereby further reducing the influence of the heat generated by the self-light emitting thermal effect of the second light emitting unit 221 on the first light emitting unit 121.
[0032] As shown in Figure 1 , the first display substrate 12 can further include a first packaging layer, a second packaging layer and a third packaging layer arranged in layers on the side of the first light emitting unit 121 away from the first driving substrate 11, so as to package the main screen display module 1; wherein the first packaging layer can be an inorganic packaging layer, the second packaging layer can be an organic packaging layer, and the third packaging layer can be an inorganic packaging layer. Similarly, the second display substrate 22 also has a first packaging layer, a second packaging layer and a third packaging layer arranged in layers on the side away from the first display substrate 12, so as to package the back screen display module 2.
[0033] Referring to Figure 2 and Figure 3 , Figure 3 is a structure sectional view of a display panel provided by the second embodiment of the present application; in specific embodiments, the pitch a of two adjacent second light emitting units 221 is equal to n times the pitch b of two adjacent first pixel definition layers 122; wherein n is a positive integer greater than or equal to 1, so as to be applicable to the case where the pixel density of the first display substrate 12 is the same as or different from the pixel density of the second display substrate 22, and to ensure that the overlapping area of the second light emitting unit 221 and the first light emitting unit 121 is as small as possible.
[0034] Specifically, as shown in Figure 2 , when the pixel density of the second display substrate 22 is the same as the pixel density of the first display substrate 12, the pitch a of two adjacent second light emitting units 221 is equal to the pitch b of two adjacent first pixel definition layers 122. The second pixel definition layer 222 can also be arranged corresponding to at least part of the first light emitting unit 121, and the axis of the first light emitting unit 121 coincides with the axis of the corresponding second pixel definition layer 222.
[0035] As shown in Figure 3As shown, in the second embodiment of the present application, the interval a of the two adjacent second light emitting units 221 is equal to 2 times of the interval b of the two adjacent first pixel definition layers 122, so as to ensure that when the pixel density of the first display substrate 12 is 2 times of the pixel density of the second display substrate 22, the axis of the second light emitting unit 221 can coincide with the axis of the corresponding first pixel definition layer 122, so as to ensure that the overlapping area of the second light emitting unit 221 and the first light emitting unit 121 is as small as possible, and the heat generated by the self-light emitting effect of the second light emitting unit 221 reduces the influence on the first light emitting unit 121.
[0036] Similarly, in some other embodiments, when the pixel density of the first display substrate 12 is n (3, 4, 5…) times of the pixel density of the second display substrate 22, the interval a of the two adjacent second light emitting units 221 is equal to n (3, 4, 5…) times of the interval b of the two adjacent first pixel definition layers 122.
[0037] Referring to Figures 4-5 , Figure 4 a structure sectional view of a back screen display module in a display panel provided by the third embodiment of the present application; Figure 5 for Figure 4 a top view of position A in the structure. The display panel 10 provided by the third embodiment of the present application is basically the same as the display panel 10 provided by the first embodiment of the present application, and the difference lies in that in the third embodiment of the present application, the back screen display module 2 further comprises a first heat insulation layer 23 arranged between the second light emitting unit 221 and the second driving substrate 21, which is used to insulate the heat generated by the second light emitting unit 221 from being transmitted to the main screen display module 1 through the second driving substrate 21, effectively blocks the heat conduction path, so that the heat generated by the self-light emitting of the back screen display module 2 is not conducted downward to the main screen display module 1, but is conducted upward to the side surface away from the main screen display module 1; thereby reducing the heat transmission of the back screen display module 2 to the main screen display module 1.
[0038] In this way, by arranging the first heat insulation layer 23 between the second light emitting unit 221 and the second driving substrate 21, the heat conduction path of the heat generated by the self-light emitting effect of the second light emitting unit 221 directly to the first light emitting unit 121 on the main screen display module 1 is further reduced, the influence of the second light emitting unit 221 of the back screen display module 2 on the first light emitting unit 121 of the main screen display module 1 is reduced, and the situation that the first light emitting unit 121 in the main screen display module 1 is affected by long-term high temperature and causes display abnormality and shortens the service life is avoided.
[0039] The first thermal insulation layer 23 is a porous thermal insulation layer to enhance the thermal insulation effect of the first thermal insulation layer 23. Specifically, the porous thermal insulation layer can be made of inorganic fibrous material or inorganic microporous material. Specifically, the inorganic fibrous material can be glass wool, and the inorganic microporous material can be diatomite or organic foam plastic.
[0040] As shown in FIG. 1, the second light emitting unit 221 can include an anode layer 2211, a light emitting layer 2212, and a cathode layer 2213 which are sequentially stacked in a direction away from the first thermal insulation layer 23. Figure 4
[0041] The anode layer 2211 is arranged on the surface of the second driving substrate 21 exposed through the second pixel accommodation area, and the second pixel definition layer 222 separates the adjacent anode layers 2211 to avoid the anode layers 2211 of adjacent second light emitting units 221 from contacting each other, thereby preventing signal crosstalk. The light emitting layer 2212 is arranged on the side surface of the anode layer 2211 away from the second driving substrate 21, and the cathode layer 2213 is arranged on the side of the light emitting layer 2212 away from the anode layer 2211 and covers the light emitting layers 2212 of the plurality of second light emitting units 221 to form a whole-surface common cathode layer 2213. The anode layer 2211 and the cathode layer 2213 transmit an anode driving signal and a cathode driving signal to the light emitting layer 2212, respectively, to drive the light emitting layer 2212 to emit light.
[0042] The width of the first thermal insulation layer 23 is greater than the width of the anode layer 2211, and the circumferential edge of the first thermal insulation layer 23 protrudes beyond the circumferential edge of the anode layer 2211 in a direction parallel to the display panel 10, so as to better insulate the heat generated by the second light emitting unit 221 from being conducted from the anode layer 2211 to the main screen display module, thereby ensuring that the heat conduction path from the second light emitting unit 221 to the first light emitting unit 121 is cut off, and further preventing the first light emitting unit 121 in the main screen display module 1 from being affected by long-term high temperature, thereby preventing display abnormalities and shortening of the service life of the first light emitting unit 121.
[0043] Specifically, the width c of the portion of the first thermal insulation layer 23 protruding beyond the anode layer 2211 is greater than or equal to 1 micrometer and less than or equal to 3 micrometers, so as to reduce the area of the first thermal insulation layer 23 while ensuring that the heat conduction path is cut off, thereby reducing the manufacturing cost. Specifically, the width c of the portion of the first thermal insulation layer 23 protruding beyond the anode layer 2211 can be any one of 1 micrometer, 1.5 micrometers, 2 micrometers, 2.5 micrometers, 3 micrometers, etc.
[0044] The thickness d of the first thermal insulation layer 23 is greater than or equal to 1 micrometer and less than or equal to 1.5 micrometers, so as to achieve good thermal insulation effect while reducing the impact on the overall thickness of the display module. Specifically, the thickness d of the first thermal insulation layer 23 can be any one of 1 micrometer, 1.2 micrometers, 1.3 micrometers, 1.4 micrometers, 1.5 micrometers.
[0045] Of course, the first light emitting unit 121 can also include an anode layer 2211, a light emitting layer 2212 and a cathode layer 2213 arranged in sequence; the specific structure and function thereof are the same as those of the second light emitting unit 221, and specific reference can be made to the second light emitting unit 221, which will not be described here again.
[0046] Continuing to refer to Figure 4 In specific embodiments, the second display substrate 22 can further include a first heat conduction layer 223, a second heat conduction layer 224 and a heat conduction via 225 connecting the first heat conduction layer 223 and the second heat conduction layer 224.
[0047] The first heat conduction layer 223 is arranged on the surface of the second pixel definition layer 222 and separates the light emitting layer 2212 and the second pixel definition layer 222, and the cathode layer 2213 and the second pixel definition layer 222, so that the heat generated by the light emitting layer 2212 is not transmitted to the side close to the first display module through the second pixel definition layer 222, but is guided by the first heat conduction layer 223 to the side away from the first display module.
[0048] Specifically, one end of the first heat conduction layer 223 is connected to the edge of a first heat insulation layer 23, and the other end extends along the second pixel definition layer 222 to the edge of an adjacent first heat insulation layer 23, so as to completely cut off the heat conduction path between the second light emitting unit 221 and the first display module. The part of the first heat conduction layer 223 located on the side wall surface of the second pixel definition layer 222 is in contact with the light emitting layer 2212, so as to absorb the heat generated by the light emitting layer 2212 during self-light emission; the part of the first heat conduction layer 223 located on the top wall surface of the second pixel definition layer 222 separates the cathode layer 2213 and the second pixel definition layer 222.
[0049] In combination Figure 4 With Figure 5 The second heat conduction layer 224 is arranged on the side surface of the cathode layer 2213 away from the light emitting layer 2212; the heat conduction via 225 is arranged on the second pixel definition layer 222, and the heat conduction via 225 penetrates the cathode layer 2213 and connects the first heat conduction layer 223 and the second heat conduction layer 224, so as to conduct the heat transferred from the light emitting layer 2212 to the first heat conduction layer 223 in the direction away from the light emitting layer 2212 through the heat conduction via 225 and the second heat conduction layer 224, thereby avoiding the situation that the heat generated by the self-light emission of the light emitting layer 2212 continuously affects the light emitting layer 2212 and affects the service life of the second light emitting unit 221.
[0050] Specifically, each first heat conduction layer 223 is provided with a plurality of heat conduction through holes 225, and the projections of the plurality of heat conduction through holes 225 are located within the projection of the first heat conduction layer 223, and the projection of the first heat conduction layer 223 is located within the projection of the second heat conduction layer 224, so as to better spread the heat.
[0051] The first heat conduction layer 223 can be an insulating heat conduction layer to avoid signal crosstalk between adjacent light emitting layers 2212. Specifically, the first heat conduction layer 223 can include nanocrystalline aluminum nitride. The thickness of the first heat conduction layer 223 is greater than or equal to 0.5 microns and less than or equal to 1 micron; specifically, the thickness of the first heat conduction layer 223 can be any one of 0.5 microns, 0.6 microns, 0.8 microns, 0.9 microns, 1 micron, etc.
[0052] The second heat conduction layer 224 can be a transparent conductive heat conduction layer to facilitate light transmission while performing resistance compensation on the cathode layer 2213. Specifically, the second heat conduction layer 224 can include graphene. The thickness of the second heat conduction layer 224 is greater than or equal to 0.5 microns and less than or equal to 1 micron; specifically, the thickness of the second heat conduction layer 224 can be any one of 0.5 microns, 0.6 microns, 0.8 microns, 0.9 microns, 1 micron, etc.
[0053] The display panel 10 and the display device are provided. The display panel 10 includes a main screen display module 1 and a back screen display module 2. The main screen display module 1 includes a first driving substrate 11 and a first display substrate 12 disposed on one side of the first driving substrate 11. The first display substrate 12 includes a plurality of first light emitting units 121 arranged in an array. The back screen display module 2 is disposed on the side of the first driving substrate 11 away from the first light emitting units 121. The back screen display module 2 includes a second driving substrate 21 and a second display substrate 22 disposed on the side surface of the second driving substrate 21 away from the first driving substrate 11. The second display substrate 22 includes a plurality of second light emitting units 221 arranged in an array. The plurality of second light emitting units 221 are disposed in a staggered manner with the plurality of first light emitting units 121. The second light emitting units 221 in the back screen display module 2 are disposed in a staggered manner with the first light emitting units 121 in the main screen display module 1, so as to eliminate the heat conduction path of the heat generated by the self-lighting effect of the second light emitting units 221 to the first light emitting units 121 on the main screen display module 1, reduce the heat effect of the second light emitting units 221 of the back screen display module 2 on the first light emitting units 121 of the main screen display module 1, and avoid the display abnormality and the shortening of the service life of the first light emitting units 121 in the main screen display module 1 caused by long-term high temperature.
[0054] Referring to Figure 6 , Figure 6A structure sectional view of a display device provided by the fourth embodiment of the present application; the fourth embodiment of the present application provides a display device suitable for a display with back screen display function. The display device can include a display panel 10, a first power module 20, a second power module 30 and a second heat insulation layer 40. Among them, the display panel 10 can be the display panel 10 involved in any one of the above embodiments. Of course, in other embodiments, the display panel 10 can also be a display panel with back screen display function in the prior art.
[0055] In combination Figure 1 With Figure 6 , the first power module 20 is used to supply power to the main screen display module 1 of the display panel 10; the first power module 20 can be specifically arranged on the backlight side of the main screen display module 1. The second power module 30 is arranged on one side of the first power module 20, and is used to supply power to the back screen display module 2 of the display panel 10; the second power module 30 can be specifically arranged between the first power module 20 and the back screen display module 2.
[0056] The second heat insulation layer 40 is arranged between the first power module 20 and the second power module 30, and is used to insulate the heat generated by the second power module 30 from being transmitted to the main screen display module 1, effectively blocking the heat conduction path, so that the heat generated by the second power module 30 will not be conducted downward to the main screen display module 1, but will be conducted upward to the side surface away from the main screen display module 1; thereby reducing the heat transmission of the second power module 30 to the corresponding part of the main screen display module 1, avoiding the display abnormality and the shortening of the service life of the first light emitting unit 121 in the main screen display module 1 due to long-term high temperature.
[0057] The second heat insulation layer 40 is a porous heat insulation layer to enhance the heat insulation effect of the second heat insulation layer 40; the second heat insulation layer 40 can specifically use the same material as the first heat insulation layer 23. The number of the second heat insulation layer 40 can be multiple, and the multiple second heat insulation layers 40 are arranged in an array and completely cover the second power module 30; that is, the projection of the second power module 30 is located within the projection of the multiple second heat insulation layers 40.
[0058] In specific embodiments, the display device can further include a first phase change layer 50, a second phase change layer 60 and a heat dissipation layer 70. Among them, the first phase change layer 50 is arranged between the first power module 20 and the second heat insulation layer 40, and is used to absorb heat by phase change when the first power module 20 generates heat; the second phase change layer 60 is arranged between the second power module 30 and the second heat insulation layer 40, and is used to absorb heat by phase change when the second power module 30 generates heat.
[0059] The heat dissipation layer 70 is arranged between the first power module 20 and the second power module 30, and is used for dissipating heat of the first power module 20 and the second power module 30. The heat dissipation layer 70 can be a multi-layer structure, and covers the second heat insulation layer 40. Specifically, the heat dissipation layer 70 can also be arranged between the second heat insulation layer 40 and the first phase change layer 50, and between the second heat insulation layer 40 and the second phase change layer 60.
[0060] The heat dissipation layer 70 has a micro gap surrounding the second heat insulation layer 40 to form a micro channel 701, and two ends of the micro channel 701 are respectively connected to the first phase change layer 50 and the second phase change layer 60, so that the second phase change layer 60 can be connected to the first phase change layer 50 through the micro channel 701 after being melted by heat. Specifically, the micro channel 701 is located at the circumferential periphery of the second power module 30.
[0061] It can be understood that the heat dissipation layer 70 forms a side wall of the micro channel 701, and the second phase change layer 60 can flow along the circumferential micro channel 701 to the connection position of the heat dissipation layer 70 and / or the first phase change layer 50 after being melted by heat, thereby changing the heat conduction path, so that the heat generated by the second power module 30 can be conducted to the peripheral area of the main screen display module 1 which does not correspond to the back screen display module 2 through the micro channel 701, so as to reduce the heat influence on the position directly opposite the back screen display module 2, make the heat evenly distributed, ensure the temperature consistency of the main screen display area, thereby significantly prolong the service life of the display panel 10 and improve the display quality.
[0062] Specifically, the first phase change layer 50 and the second phase change layer 60 each include a phase change material, and the phase change material can be a double-phase change polymer composed of a metal phase change material or a metal hybrid material.
[0063] The width e of the micro channel 701 is greater than or equal to 3 mm and less than or equal to 5 mm, so as to conduct heat to a position far from the back screen display module 2. Specifically, the width of the micro channel 701 can be any value of 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm.
[0064] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.
Claims
1. A display panel, characterized in that, include: The main screen display module includes a first driving substrate and a first display substrate disposed on one side of the first driving substrate; The first display substrate includes a plurality of first light-emitting units arranged in an array; A rear screen display module is disposed on the side of the first driving substrate away from the first display substrate; the rear screen display module includes a second driving substrate and a second display substrate disposed on the surface of the second driving substrate away from the first driving substrate; the second display substrate includes a plurality of second light-emitting units arranged in an array; In this configuration, multiple second light-emitting units are staggered with multiple first light-emitting units.
2. The display panel according to claim 1, characterized in that, The first display substrate further includes a first pixel definition layer disposed on the surface of the first driving substrate; the first pixel definition layer protrudes from the first driving substrate and surrounds a plurality of first pixel receiving areas; the first light-emitting unit is disposed in the first pixel receiving area; The second display substrate further includes a second pixel definition layer disposed on the surface of the second driving substrate; The second pixel definition layer protrudes from the second driving substrate and surrounds a plurality of second pixel receiving areas; The second light-emitting unit is disposed within the second pixel accommodating area; The second light-emitting unit is disposed corresponding to at least a portion of the first pixel definition layer, and the axis of the second light-emitting unit coincides with the axis of the corresponding first pixel definition layer.
3. The display panel according to claim 2, characterized in that, The spacing between two adjacent second light-emitting units is equal to n times the spacing between two adjacent first pixel definition layers; where n is a positive integer greater than or equal to 1.
4. The display panel according to any one of claims 1-3, characterized in that, The rear screen display module also includes: A first heat insulation layer is disposed between the second light-emitting unit and the second driving substrate to isolate the heat generated by the second light-emitting unit; the first heat insulation layer is a porous heat insulation layer.
5. The display panel according to claim 4, characterized in that, The second light-emitting unit includes an anode layer, a light-emitting layer, and a cathode layer stacked sequentially in a direction away from the first heat insulation layer; The width of the first heat insulation layer is greater than the width of the anode layer; and along a direction parallel to the display panel, the circumferential edge of the first heat insulation layer protrudes beyond the circumferential edge of the anode layer.
6. The display panel according to claim 5, characterized in that, The width of the portion of the first heat insulation layer protruding from the anode layer is greater than or equal to 1 micrometer and less than or equal to 3 micrometers; The thickness of the first insulation layer is greater than or equal to 1 micrometer and less than or equal to 1.5 micrometers.
7. The display panel according to claim 5, characterized in that, The second display substrate further includes: A first thermally conductive layer is disposed on the surface of the second pixel definition layer, and isolates the light-emitting layer from the second pixel definition layer, and the cathode layer from the second pixel definition layer; The second thermally conductive layer is disposed on the side of the cathode layer away from the light-emitting layer; A thermally conductive via is disposed on the second pixel definition layer; the thermally conductive via penetrates the cathode layer and connects the first thermally conductive layer and the second thermally conductive layer.
8. The display panel according to claim 7, characterized in that, The first thermally conductive layer is an insulating thermally conductive layer; the first thermally conductive layer comprises nanocrystalline aluminum nitride; the thickness of the first thermally conductive layer is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer; The second thermally conductive layer is a transparent conductive thermally conductive layer; the second thermally conductive layer includes graphene; the thickness of the second thermally conductive layer is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.
9. A display device, characterized in that, include: Display panel; The display panel is the display panel described in any one of claims 1-8; The first power supply module is used to supply power to the main screen display module of the display panel. The second power module is disposed on one side of the first power module and is used to supply power to the back screen display module of the display panel. A second heat insulation layer is disposed between the first power module and the second power module; the second heat insulation layer is a porous heat insulation layer.
10. The display device according to claim 9, characterized in that, Also includes: A first phase change layer is disposed between the first power module and the second heat insulation layer; The second phase change layer is disposed between the second power module and the second heat insulation layer; A heat dissipation layer is disposed between the first power module and the second power module; the heat dissipation layer has microchannels, and the two ends of the microchannels are respectively connected to the first phase change layer and the second phase change layer; and the microchannels are located on the circumferential periphery of the second power module; The second phase change layer can be heated and melted, and flows along the microchannel to connect with the heat dissipation layer and / or the first phase change layer.