A display panel and a display device

Abstract

An embodiment of the present application provides a display panel and a display device, including a conventional display area and a light-transmitting functional area, where the conventional display area at least partially surrounds the light-transmitting functional area; a plurality of first sub-pixels are arranged in the conventional display area, and a plurality of second sub-pixels are arranged in the light-transmitting functional area, and the light transmittance of the light-transmitting functional area in the display panel is greater than that of the conventional display area; wherein, along the thickness direction of the display panel, the display panel includes at least two conductive film layers; the light-transmitting functional area further includes a plurality of first heat dissipation structures, and the first heat dissipation structures are arranged in the same layer as at least one of the at least two conductive film layers. In the technical solution of the present application, the first heat dissipation structures are arranged at the position of the light-transmitting functional area, so that the heat dissipation effects of the light-transmitting functional area and the conventional display area are basically the same; and the first heat dissipation structures are arranged in the same layer as at least one of the inherent conductive film layers in the display panel, which is easy to implement and does not increase the thickness of the display panel.

Description

[0001] This application is a divisional application of the application with the application date of November 30, 2020, the application number of 202011384447.5, and the invention creation name of "A display panel and a display device".

Technical Field

[0002] This application relates to the field of display technologies, and in particular, to a display panel and a display device.

Background Art

[0003] With the increase in consumer demand, full-screen display has gradually become the mainstream display technology. In the existing full-screen display, a light-transmitting functional area is usually set in the display area, and the position where the light-transmitting functional area is located is used to set optical devices. Since the optical devices are not set in the non-display area, the border of the display screen becomes narrower, and thus full-screen display can be achieved. The light-transmitting functional area can display and transmit external light at the same time. In order to ensure the light transmittance of the light-transmitting functional area, no or few light-shielding structures are set in the light-transmitting functional area, such as no metal traces and pixel circuits are set.

[0004] When the density of the metal traces and pixel circuits in the light-transmitting functional area is different from that in the conventional display area, the heat dissipation effects of the light-transmitting functional area and the conventional display area will be different, and then the temperature of the light-transmitting functional area will be higher than that of the conventional display area. And the higher temperature will affect the display characteristics of the display screen, so there will be an obvious difference in the display effects between the light-transmitting functional area and the conventional display area. For example, there is an abnormal phenomenon that the light-transmitting functional area is darker than the conventional display area.

[0005]

Content of the Application

[0006] In view of this, embodiments of the present application provide a display panel and a display device to solve the above problems.

[0007] In a first aspect, an embodiment of the present application provides a display panel, including a conventional display area and a light-transmitting functional area, and the conventional display area at least partially surrounds the light-transmitting functional area; a plurality of first sub-pixels are set in the conventional display area, and a plurality of second sub-pixels are set in the light-transmitting functional area, and the light transmittance of the light-transmitting functional area in the display panel is greater than that of the conventional display area; wherein, along the thickness direction of the display panel, the display panel includes at least two conductive film layers; the light-transmitting functional area further includes a plurality of first heat dissipation structures, and the first heat dissipation structures are arranged in the same layer as at least one of the at least two conductive film layers.

[0008] In one implementation manner of the first aspect, the heat dissipation structure is curved.

[0009] In one implementation of the first aspect, the conventional display area includes a plurality of first pixel circuits and a plurality of first signal lines. The first pixel circuits in the conventional display area are electrically connected to the corresponding first sub-pixels in the conventional display area and are also electrically connected to the first signal lines in the conventional display area. The light-transmitting function area includes a plurality of second pixel circuits and a plurality of second signal lines. The second pixel circuits in the light-transmitting function area are electrically connected to the corresponding second sub-pixels in the light-transmitting function area and are also electrically connected to the second signal lines in the light-transmitting function area. Among them, the density of the plurality of second pixel circuits in the light-transmitting function area is less than the density of the plurality of first pixel circuits in the conventional display area, and the density of the plurality of second signal lines is less than the density of the plurality of first signal lines.

[0010] In one implementation of the first aspect, the display panel further includes a transition area located between the conventional display area and the light-transmitting function area. The conventional display area includes a plurality of first pixel circuits and first signal lines. The first pixel circuits in the conventional display area are electrically connected to the corresponding first sub-pixels in the conventional display area and are also electrically connected to the first signal lines in the conventional display area. The transition area includes a plurality of third pixel circuits and third signal lines. The third pixel circuits in the transition area are electrically connected to the second signal lines in the transition area, and at least some of the third pixel circuits in the transition area are electrically connected to the second sub-pixels in the light-transmitting function area through transparent conductive electrodes.

[0011] In one implementation of the first aspect, the transition area further includes a plurality of second heat dissipation structures, and the second heat dissipation structures are arranged in the same layer as at least one of the at least two conductive film layers.

[0012] In one implementation of the first aspect, the density of the plurality of second heat dissipation structures is less than the density of the plurality of first heat dissipation structures.

[0013] In one implementation of the first aspect, the width of the second heat dissipation structure is greater than the width of the first heat dissipation structure.

[0014] In one implementation of the first aspect, the edge of the light-transmitting function area includes a third heat dissipation structure, and the third heat dissipation structure surrounds the light-transmitting function area. The third heat dissipation structure is arranged in the same layer as at least one of the at least two conductive film layers, and all the first heat dissipation structures are electrically connected to the third heat dissipation structure.

[0015] In one implementation of the first aspect, the display panel further includes a transition area, and the transition area further includes a plurality of second heat dissipation structures. All the second heat dissipation structures are electrically connected to the third heat dissipation structure.

[0016] In one implementation of the first aspect, in the direction from the conventional display area to the light-transmitting function area, the density of the first heat dissipation structures gradually increases.

[0017] In an implementation of the first aspect, at least three second sub-pixels with different light-emitting colors form a light-emitting pixel; the display panel further includes a plurality of auxiliary heat dissipation structures surrounding the second sub-pixels; the auxiliary heat dissipation structures corresponding to different second sub-pixels in the same light-emitting pixel are electrically connected and are also electrically connected to the first heat dissipation structure.

[0018] In an implementation of the first aspect, at least two of the conductive film layers include a metal conductive film layer and a transparent trace conductive film layer.

[0019] In a second aspect, an embodiment of the present application provides a display device, including the display panel provided in the first aspect and an optical device, and the optical device is disposed at a position corresponding to the light-transmitting functional area of the display device.

[0020] In an implementation of the second aspect, the optical device is at least one of an optical fingerprint sensor, an iris recognition sensor, and a camera.

[0021] The technical solution provided by the embodiment of the present application provides a first heat dissipation structure in the light-transmitting functional area. The first heat dissipation structure serves as the main heat dissipation component in the light-transmitting functional area, and the first signal line in the conventional display area serves as the main heat dissipation component, so that the heat dissipation effects of the light-transmitting functional area and the conventional display area are basically the same, and further, the display difference problem caused by the temperature difference between the light-transmitting functional area and the conventional display area can be improved. In addition, since the first heat dissipation structure in the display panel provided by the embodiment of the present application is disposed on the same layer as at least one conductive film layer inherent in the display panel, that is, the first heat dissipation structure is formed simultaneously when preparing the conductive structure of the display panel, no additional manufacturing process is required, which is easy to implement and will not increase the thickness of the display panel.

Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic diagram of a display panel provided by an embodiment of the present application;

[0024] Figure 2 It is a schematic diagram of another display panel provided by an embodiment of the present application;

[0025] Figure 3 For Figure 1 a partial enlarged view of the AA area in

[0026] Figure 4 For Figure 1Another partial enlarged view of the AA area in the middle;

[0027] Figure 5 is Figure 3 A partial cross-sectional view of the shown display panel;

[0028] Figure 6 is Figure 4 A partial cross-sectional view of the shown display panel;

[0029] Figure 7 A schematic diagram showing the relationship between the heat dissipation structure and the second sub-pixel in a display panel provided by an embodiment of the present application;

[0030] Figure 8 Another schematic diagram showing the relationship between the heat dissipation structure and the second sub-pixel in a display panel provided by an embodiment of the present application;

[0031] Figure 9 A schematic plan view of the heat dissipation structure in a display panel provided by an embodiment of the present application;

[0032] Figure 10 Another schematic plan view of the heat dissipation structure in a display panel provided by an embodiment of the present application;

[0033] Figure 11 A cross-sectional view near the light-transmitting functional area in a display panel provided by an embodiment of the present application;

[0034] Figure 12 is Figure 11 A corresponding schematic plan view;

[0035] Figure 13 A schematic diagram of a display device provided by an embodiment of the present application.

Detailed implementation manners

[0036] For a better understanding of the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0037] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0038] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0039] It should be understood that the term "and / or" used herein is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0040] In the description of this specification, it should be understood that words such as "substantially", "approximately", "about", "around", "roughly", and "generally" described in the claims and embodiments of this application refer to what can be generally recognized within a reasonable process operation range or tolerance range, rather than an exact value.

[0041] It should be understood that although terms such as first, second, and third may be used in the embodiments of this application to describe signal lines, pixel circuits, etc., these signal lines and pixel circuits should not be limited to these terms. These terms are only used to distinguish the signal lines and pixel circuits from each other. For example, without departing from the scope of the embodiments of this application, the first signal line can also be referred to as the second signal line, and similarly, the second signal line can also be referred to as the first signal line.

[0042] Through careful and in-depth research, the applicant of this case has provided a solution to the problems existing in the prior art.

[0043] The embodiments of this application provide a display panel and a display device.

[0044] Figure 1 It is a schematic diagram of a display panel provided by the embodiments of this application. Figure 2 It is a schematic diagram of another display panel provided by the embodiments of this application. Figure 3 It is Figure 1 a partial enlarged view of the AA area in Figure 4 It is Figure 1 another partial enlarged view of the AA area in Figure 5 It is Figure 3 a partial cross-sectional view of the display panel shown in Figure 6 It is Figure 4 a partial cross-sectional view of the display panel shown in. It should be noted that Figure 3 and Figure 4 the specific structure of the AA area schematically shown can be substantially the same as the specific structure near the light-transmitting functional area in Figure 2 It is

[0045] As Figure 1 and Figure 2 shown, the display panel provided by the embodiments of this application includes a conventional display area 01 and a light-transmitting functional area 02, and the conventional display area 01 at least partially surrounds the light-transmitting functional area 02. As Figure 1As shown, the light-transmitting functional area 02 can be completely surrounded by the conventional display area 01; as Figure 2 shown, the light-transmitting functional area 02 can also be partially surrounded by the conventional display area 01.

[0046] As Figure 3 and Figure 4 shown, a plurality of first sub-pixels PX1 that can emit light are arranged in the conventional display area 01 for performing main light-emitting display. A plurality of second sub-pixels PX2 that can emit light are arranged in the light-transmitting functional area 02. The area of the display panel corresponding to the light-transmitting functional area 02 can transmit external light outside the display panel, and at the same time, the light-transmitting functional area 02 can also be used for light-emitting display.

[0047] Among them, the light transmittance of the area where the light-transmitting functional area 02 is located is greater than the light transmittance of the area where the conventional display area 01 is located, that is, the light transmittance of the area where the light-transmitting functional area 02 is located allowing external light outside the display panel to pass through is greater than the light transmittance of the area where the conventional display area 01 is located allowing external light outside the display panel to pass through. In addition to realizing light-emitting display, the light-transmitting functional area 02 can also realize at least one of other functions such as photographing, biometric recognition, lighting and other functions.

[0048] The light-transmitting functional area 02 is at least partially surrounded by the conventional display area 01, which is equivalent to arranging the light-transmitting functional area 02 in the conventional display area 01, then it is possible to avoid the non-display area outside the conventional display area 01 where the light-transmitting functional area 02 is arranged from increasing the frame width of the display panel.

[0049] It should be noted that the light-transmitting functional area 02 can be an oval structure as Figures 1-4 shown, or a circular structure or a rectangular structure, etc. The present application does not limit the specific shape of the light-transmitting functional area 02.

[0050] In order to make the light transmittance of the light-transmitting functional area 02 greater than the light transmittance of the conventional display area 01, the density of the light-blocking structure in the light-transmitting functional area 02 should be less than the density of the light-blocking structure in the conventional display area 01, then the density of the pixel circuit and / or metal traces in the light-transmitting functional area 02 is less than the density of the pixel circuit and / or metal traces in the conventional display area 01, and even no pixel circuit or metal traces are arranged in the light-transmitting functional area 02.

[0051] In one implementation manner of this embodiment, as Figure 3 and Figure 5 shown, the conventional display area 01 includes a plurality of first pixel circuits DI1 and first signal lines L1, and the light-transmitting functional area 02 includes a plurality of second pixel circuits DI2 and second signal lines L2. Among them, the density of the plurality of second signal lines L2 in the light-transmitting functional area 02 is less than the density of the plurality of first signal lines L1 in the conventional display area 01.

[0052] As Figure 3 and Figure 5 shown, the first pixel circuit DI1 in the conventional display area 01 is electrically connected to at least one first sub-pixel PX1 in the conventional display area 01, and is used to provide the current or voltage required for the corresponding first sub-pixel PX1 to emit light. As Figure 3 and Figure 5 shown, one first pixel circuit DI1 is electrically connected to one first sub-pixel PX1; in addition, one first pixel circuit DI1 can also be electrically connected to multiple first sub-pixels PX1.

[0053] The first pixel circuit DI1 is electrically connected to the first signal line L1, and the first signal line L1 can be electrically connected to the gate and / or source of at least one transistor in the first pixel circuit DI1, and is used to provide a control signal and / or a display data signal, etc. for the first pixel circuit DI1.

[0054] The second pixel circuit DI2 in the light-transmitting function area 02 is electrically connected to at least one second sub-pixel PX2 in the light-transmitting function area 02, and is used to provide the current or voltage required for the corresponding second sub-pixel PX2 to emit light. As Figure 3 and Figure 5 shown, one second pixel circuit DI2 is electrically connected to one second sub-pixel PX2; in addition, one second pixel circuit DI2 can also be electrically connected to multiple second sub-pixels PX2.

[0055] The second pixel circuit DI2 is electrically connected to the second signal line L2, and the second signal line L2 can be electrically connected to the gate and / or source of at least one transistor in the second pixel circuit DI2, and is used to provide a control signal and / or a display data signal, etc. for the second pixel circuit DI2.

[0056] It should be noted that the first signal line L1 and the second signal line L2 that respectively provide signals for the first pixel circuit DI1 and the second pixel circuit DI2 are metal traces.

[0057] In this implementation, since the second sub-pixel PX2, the second pixel circuit DI2, and the second signal line L2 are provided in the light-transmitting functional area 02, in order to achieve a light transmittance of the light-transmitting functional area 02 greater than that of the conventional display area 01, the density of the second sub-pixel PX2 in the light-transmitting functional area 02 can be set to be less than the density of the first sub-pixel PX1 in the conventional display area 01. Correspondingly, the density of the second pixel circuit DI2 in the light-transmitting functional area 02 is less than the density of the first pixel circuit DI1 in the conventional display area 01, and the density of the second signal line L2 in the light-transmitting functional area 02 is less than the density of the first signal line L2 in the conventional display area 02. Since the first signal line L1, the second signal line L2, the first pixel circuit DI1, and the second pixel circuit DI2 are all light-blocking structures, when the density of the second signal line L2 and the density of the second pixel circuit DI2 are respectively less than the density of the first signal line L1 and the density of the first pixel circuit DI1, the light transmittance of the light-transmitting functional area 02 is greater than that of the conventional display area 01.

[0058] In another implementation of the embodiment of the present application, as Figure 4 and Figure 6 shown, the display panel further includes a transition area 03, and the transition area 03 is located between the conventional display area 01 and the light-transmitting functional area 02.

[0059] The conventional display area 01 includes a plurality of first pixel circuits DI1, and the first pixel circuits DI1 in the conventional display area 01 are correspondingly electrically connected to at least one first sub-pixel PX1 in the conventional display area 01, and are used to provide the current or voltage required for the corresponding first sub-pixel PX1 to emit light. As Figure 4 and Figure 6 shown, one first pixel circuit DI1 is correspondingly electrically connected to one first sub-pixel PX1; in addition, one first pixel circuit DI1 can also be correspondingly electrically connected to a plurality of first sub-pixel PX1.

[0060] The transition area 03 includes a plurality of third pixel circuits DI3, a plurality of third sub-pixels PX3, and a third signal line L3. Some of the third pixel circuits DI3 in the transition area 03 are correspondingly electrically connected to at least one third sub-pixel PX3 in the transition area 03, and are used to provide the current or voltage required for the corresponding third sub-pixel PX3 to emit light. The third pixel circuit DI3 is electrically connected to the third signal line L3, and the third signal line L3 can be electrically connected to the gate and / or source of at least one transistor in the third pixel circuit DI3, and is used to provide a control signal and / or a display data signal, etc. for the third pixel circuit DI3. As Figure 4 and Figure 6 shown, one third pixel circuit DI3 is correspondingly electrically connected to one third sub-pixel PX3; in addition, one third pixel circuit DI3 can also be correspondingly electrically connected to a plurality of third sub-pixel PX3.

[0061] In addition, some of the third pixel circuits DI3 in the transition region 03 are correspondingly electrically connected to at least one second sub-pixel PX2 in the light-transmitting functional region 02, and are used to provide the current or voltage required for the corresponding second sub-pixel PX2 to emit light. As Figure 4 and Figure 6 shown, one third pixel circuit DI3 is correspondingly electrically connected to one second sub-pixel PX2; in addition, one third pixel circuit DI3 can also be correspondingly electrically connected to multiple second sub-pixels PX2. Among them, the third pixel circuit DI3 in the transition region 03 that is correspondingly electrically connected to the second sub-pixel PX2 in the light-transmitting functional region 02 is specifically connected through the transparent conductive electrode L4, and some of the third pixel circuits are correspondingly electrically connected to at least one of the second sub-pixels PX2 through the transparent conductive electrode L4.

[0062] That is, the multiple third pixel circuits DI3 included in the transition region 03 include a first type of third pixel circuit DI3a and a second type of third pixel circuit DI3b. Among them, the first type of third pixel circuit DI3a is electrically connected to the third sub-pixel PX3, and the second type of third pixel circuit DI3b is electrically connected to the second sub-pixel PX2. Then, the pixel circuit that provides the current or voltage required for the second sub-pixel PX2 in the light-transmitting functional region 02 to emit light is located in the transition region 03, and the pixel circuit that does not provide the current or voltage required for the second sub-pixel PX2 to emit light and the signal line that provides a signal for the pixel circuit are not provided in the light-transmitting functional region 02. The signal line that provides a signal for the pixel circuit is a metal trace. Since the pixel circuit and the signal line that provides a signal for it are both light-blocking structures, when the pixel circuit and the signal line that provides a signal for it are not provided in the light-transmitting functional region 02, the light transmittance of the light-transmitting functional region 02 is greater than that of the conventional display region 01.

[0063] In the embodiment of the present application, as Figure 5 and Figure 6 shown, along the thickness direction of the display panel, the display panel includes at least two conductive film layers.

[0064] Please continue to refer to Figure 5 and Figure 6 , the transistor in the first pixel circuit DI1 includes a first gate 211, a first source 212, and a first drain 213. Among them, the first gate 211, the first source 212 / the first drain 213 can be located in different conductive film layers, and specifically can be located in different metal film layers. Among them, the first gate 211 and / or the first source 212 can be electrically connected to the first signal line L1. Please continue to refer to Figure 5, the transistors in the second pixel circuit DI2 include a second gate 221, a second source 222, and a second drain 223. Among them, the second gate 221, the second source 222 / the second drain 223 can be disposed on the same layer as the first gate 211 and / or the first source 212 respectively. Please continue to refer to Figure 6 , the transistors in the third pixel circuit DI3 include a third gate 231, a third source 232, and a third drain 233. Among them, the third gate 231, the third source 232 / the third drain 233 can also be disposed on the same layer as the first gate 211 and / or the first source 212 respectively.

[0065] Please continue to refer to Figure 5 and Figure 6 , the first sub-pixel PX1 includes a first light-emitting layer 111, a first anode 112, and a first cathode 113. Among them, the first light-emitting layer 111 is located between the first anode 112 and the first cathode 113. The first anode 112 is electrically connected to the first drain 213 included in a transistor in the first pixel circuit DI1. When there is a certain voltage difference between the first anode 112 and the first cathode 113, it can cause the first light-emitting layer 111 to emit light. And one of the first anode 112 and the first cathode 113 is a metal electrode, and the other is a transparent electrode. For example Figure 5 and Figure 6 as shown, in the top-emission display panel, the first anode 112 is a metal electrode.

[0066] Please continue to refer to Figure 5 and Figure 6 , the second sub-pixel PX2 includes a second light-emitting layer 121, a second anode 122, and a second cathode 123. Among them, the second light-emitting layer 121, the second anode 122, and the second cathode 123 are respectively disposed on the same layer as the first light-emitting layer 111, the first anode 112, and the first cathode 113. When the second sub-pixel PX2 located in the light-transmitting functional area 02 is electrically connected to the second pixel circuit DI2 located in the light-transmitting functional area 02, the second anode 122 is electrically connected to the second drain 223.

[0067] Please continue to refer to Figure 6 , the third sub-pixel PX3 includes a third light-emitting layer 131, a third anode 132, and a third cathode 133. Among them, the third light-emitting layer 131, the third anode 132, and the third cathode 133 are respectively disposed on the same layer as the first light-emitting layer 111, the first anode 112, and the first cathode 113. When the first type of third pixel circuit DI3a is electrically connected to the third sub-pixel PX3 and the second type of third pixel circuit DI3b is electrically connected to the second sub-pixel PX2, the third anode 132 is electrically connected to the third anode 132 of the first type of third pixel circuit DI3a, and the second anode 122 is electrically connected to the third anode 132 of the second type of third pixel circuit DI3b.

[0068] In addition, as Figure 5 and Figure 6 shown, the display panel may further include a touch layer, and the touch layer includes touch electrodes and touch traces 30.

[0069] Then, along the thickness direction of the display panel, the display panel includes a conductive film layer including a first gate 211 / a second gate 221 / a third gate 231, a conductive film layer including a first source 212 / a first drain 213 / a second source 222 / a second drain 223 / a third source 232 / a third drain 233, a conductive film layer including a first anode 112 / a second anode 122 / a third anode 132, a conductive film layer including a first cathode 113 / a second cathode 123 / a third cathode 133, a conductive film layer including touch electrodes, and a conductive film layer including touch traces 30.

[0070] In an embodiment of the present application, the light-transmitting functional area 02 of the display panel further includes a plurality of first heat dissipation structures 40, and the first heat dissipation structures 40 are disposed in the same layer as at least one of the above at least two conductive film layers. That is, the first heat dissipation structures 40 may be disposed in the same layer as at least one of the conductive film layer including the first gate 211 / the second gate 221 / the third gate 231, the conductive film layer including the first source 212 / the first drain 213 / the second source 222 / the second drain 223 / the third source 232 / the third drain 233, the conductive film layer including the first anode 112 / the second anode 122 / the third anode 132, the conductive film layer including the first cathode 113 / the second cathode 123 / the third cathode 133, the conductive film layer including touch electrodes, and the conductive film layer including touch traces 30.

[0071] The technical solution provided by the embodiment of the present application sets the first heat dissipation structures 40 in the light-transmitting functional area 02. Then, the first heat dissipation structures 40 serve as the main heat dissipation components in the light-transmitting functional area 02, and the first signal lines L1 in the conventional display area 01 serve as the main heat dissipation components, so that the heat dissipation effects of the light-transmitting functional area 02 and the conventional display area 01 are basically the same, thereby improving the display difference problem caused by the temperature difference between the light-transmitting functional area 02 and the conventional display area 01. In addition, since the first heat dissipation structures 40 in the display panel provided by the embodiment of the present application are disposed in the same layer as at least one of the inherent conductive film layers in the display panel, that is, the first heat dissipation structures 40 are formed simultaneously when preparing the conductive structure of the display panel, no additional preparation process is required, which is easy to implement and does not increase the thickness of the display panel.

[0072] Further, the first heat dissipation structure 40 is at least provided on the same layer as one metal film layer. For example, the first heat dissipation structure 40 can be provided on the same layer as at least one of the conductive film layers including the first gate 211 / second gate 221 / third gate 231, the conductive film layers including the first source 212 / first drain 213 / second source 222 / second drain 223 / third source 232 / third drain 233, the conductive film layers including the first anode 112 / second anode 122 / third anode 132, and the conductive film layer including the touch trace 30.

[0073] Since metal has good heat conduction characteristics, at least one of the film layers in the first heat dissipation structure 40 is made of metal, which can achieve a better heat dissipation effect.

[0074] Furthermore, the film layer where the first heat dissipation structure 40 is located is close to the film layer where the second light-emitting layer 121 is located. For example, the first heat dissipation structure 40 can be provided on the same layer as the second anode 122 or on the same layer as the touch trace 30. Among them, the touch trace 30 is located on the side of the touch layer close to the second light-emitting layer 121.

[0075] The inventors found that the main reason for the abnormal display of the light-transmitting functional area 02 in the prior art is that the heat generated during the display of the light-transmitting functional area 02 cannot be exported in time, which changes the material properties in the light-emitting layer and thus results in abnormal display. Setting at least one of the film layers in the first heat dissipation structure 40 on the same layer as the second anode 122 or the touch trace 30 close to the second light-emitting layer 121 can better and quickly conduct the heat near the second light-emitting layer 121, avoiding the influence of heat accumulation on the light-emitting characteristics of the second light-emitting layer 121.

[0076] In an embodiment of the present application, the light-emitting pixel is composed of at least three second sub-pixels with different light-emitting colors; along the thickness direction of the display panel, the light-emitting pixel at least partially overlaps with the first heat dissipation structure.

[0077] Figure 7 It is a schematic diagram of the relationship between the heat dissipation structure and the second sub-pixel in a display panel provided by an embodiment of the present application. Figure 8 It is another schematic diagram of the relationship between the heat dissipation structure and the second sub-pixel in a display panel provided by an embodiment of the present application.

[0078] In an embodiment of the present application, as Figure 7 and Figure 8 shown, at least three second sub-pixels PX2 with different light-emitting colors in the light-transmitting functional area 02 form a light-emitting pixel PX. Among them, the three second sub-pixels PX2 with different light-emitting colors can be a red second sub-pixel, a blue second sub-pixel, and a green second sub-pixel respectively. As Figure 7 and Figure 8As shown, the display panel further includes a plurality of auxiliary heat dissipation structures 40', the auxiliary heat dissipation structures 40' surround the second sub-pixels PX2, and the auxiliary heat dissipation structures 40' corresponding to at least three different sub-pixels PX2 in the same light-emitting pixel PX are electrically connected and electrically connected to the first heat dissipation structure 40. That is, auxiliary heat dissipation structures 40' are provided around the regions where the respective second sub-pixels PX2 are located, and the auxiliary structures 40' are electrically connected to the first heat dissipation structure 40.

[0079] Since auxiliary heat dissipation structures 40' surrounding each of the regions where the respective second sub-pixels PX2 are located are provided, and the auxiliary heat dissipation structures 40' are electrically connected to the first heat dissipation structure, the heat in the regions where the respective second sub-pixels PX2 are located can be quickly and effectively dissipated; moreover, since the auxiliary heat dissipation structures 40' corresponding to the multiple second sub-pixels PX2 belonging to the same light-emitting pixel PX are electrically connected, the temperature uniformity of the multiple second sub-pixels PX2 in the light-emitting pixels PX in the light-transmitting functional region 02 is good, and the white balance effect is better; in addition, since auxiliary heat dissipation structures 40' are provided around each of the second sub-pixels PX2, the optical performance around each of the second sub-pixels PX2 can be ensured to be consistent.

[0080] It should be noted that the auxiliary heat dissipation structures 40' can be provided on the same layer as at least two conductive film layers in the display panel. Further, the auxiliary heat dissipation structures 40' can be provided on the same layer as the first heat dissipation structure 40.

[0081] In one implementation manner of this embodiment, as Figure 7 shown, the first heat dissipation structures 40 are uniformly distributed in the light-transmitting functional region 02.

[0082] In another implementation manner of this embodiment, as Figure 8 shown, in the direction from the normal display region 01 to the light-transmitting functional region 02, the density of the first heat dissipation structures 40 gradually increases, that is, the closer the first heat dissipation structures 40 are to the normal display region 01, the smaller their density.

[0083] As Figure 8 shown, the first heat dissipation structures 40 in the light-transmitting functional region 02 can include a first type of first heat dissipation structure 40a and a second type of first heat dissipation structure 40b. Among them, the first type of first heat dissipation structure 40a is the first heat dissipation structure 40 directly connected to the auxiliary heat dissipation structure 40', and the second type of first heat dissipation structure 40b is the first heat dissipation structure 40 not connected to the auxiliary heat dissipation structure 40'. Among them, the first type of first heat dissipation structure 40a can be uniformly distributed in the light-transmitting functional region 02, and the closer the second type of first heat dissipation structure 40b is to the normal display region 01, the smaller its density.

[0084] Since the area in the light-transmitting functional area 02 that is farther away from the conventional display area 01 is also farther away from the first signal line L1 in the conventional display area 01, the heat dissipation effect of the second light-emitting layer 121 in the area of the light-transmitting functional area that is farther away from the conventional display area 01 is worse. In this embodiment, by setting a larger density of the first heat dissipation structure 40 in the central area close to the light-transmitting functional area 02 and a smaller density of the first heat dissipation structure 40 close to the conventional display area 01, the heat dissipation effects of different areas of the light-transmitting functional area 02 are balanced.

[0085] Figure 9 It is a schematic plan view of a heat dissipation structure in a display panel provided by an embodiment of the present application.

[0086] In an embodiment of the present application, as Figure 9 shown, the edge of the light-transmitting functional area 02 includes a third heat dissipation structure 50, and the third heat dissipation structure 50 is provided on the same layer as at least one of at least two conductive film layers included in the display panel. That is, the third heat dissipation structure 50 can be provided on the same layer as the conductive film layer including the first gate 211 / second gate 221 / third gate 231, the conductive film layer including the first source 212 / first drain 213 / second source 222 / second drain 223 / third source 232 / third drain 233, the conductive film layer including the first anode 112 / second anode 122 / third anode 132, the conductive film layer including the first cathode 113 / second cathode 123 / third cathode 133, the conductive film layer including the touch electrode, and the conductive film layer including the touch trace 30.

[0087] In an implementation manner of this embodiment, the third heat dissipation structure 50 can be provided on the same layer as the first heat dissipation structure 40.

[0088] Please continue to refer to Figure 9 , in this embodiment, the third heat dissipation structure 50 surrounds the light-transmitting functional area 02 and all the first heat dissipation structures 40 provided in the light-transmitting functional area 02 are electrically connected to the third heat dissipation structure 50. On the one hand, the heat in the light-transmitting functional area 02 can be conducted to the outer edge of the light-transmitting functional area 02 through the electrically connected first heat dissipation structure 40 and third heat dissipation structure 50, avoiding the aggregation in the area close to the center of the light-transmitting functional area 02 and affecting the display of the main area of the light-transmitting functional area 02; on the other hand, since all the first heat dissipation structures 40 in the light-transmitting functional area 02 are electrically connected to the third heat dissipation structure 50, all the first heat dissipation structures in the light-transmitting functional area 02 are also electrically connected, so that the temperatures of the first heat dissipation structures distributed throughout the light-transmitting functional area 02 can be equal, realizing the temperature uniformity of the entire light-transmitting functional area 02, and further making the display brightness of the entire area of the light-transmitting functional area 02 uniform.

[0089] In addition, as Figures 7-9As shown, in the display panel provided by the embodiment of the present application, the first heat dissipation structure 40 provided on the same layer as at least one conductive film layer in the display panel is curved, that is, the projection of the first heat dissipation structure 40 in the thickness direction of the display panel is curved, and the first heat dissipation structure 40 can be electrically insulated from both the signal line for transmitting signals and the electrical structure for display in the display panel. In the embodiment of the present application, the first heat dissipation structure 40 is a curved structure, which can effectively slow down the light diffraction phenomenon at the position of the light transmission functional area 02 and ensure the accuracy of optical image acquisition at the position where the light transmission functional area 02 is located.

[0090] Figure 10 It is a schematic plan view of the heat dissipation structure in another display panel provided by the embodiment of the present application.

[0091] As Figure 10 shown, when the display panel further includes a transition area 03, a second heat dissipation structure 60 is provided in the transition area 03, and the second heat dissipation structure 60 is also provided on the same layer as at least one of the at least two conductive film layers included in the display panel. Among them, the specific film layer where the second heat dissipation structure 60 is provided can be the same as that of the first heat dissipation structure 40, which will not be elaborated here.

[0092] Please continue to refer to Figure 10 , the density of the multiple second heat dissipation structures 60 in the transition area 03 is less than the density of the multiple first heat dissipation structures 40 in the light transmission functional area 02. The transition area 03 has a third signal line L3 that can dissipate heat relative to the light transmission functional area 02. Then, when an additional heat dissipation structure is provided in the transition area 03, its density can be less than the density of the first heat dissipation structure 40 in the light transmission functional area 02.

[0093] In addition, as Figure 10 shown, the width of the second heat dissipation structure 60 can be set to be greater than the width of the first heat dissipation structure 40. Since the light transmittance of the transition area 03 to external light is less than the light transmittance of the light transmission functional area 02 to external light, setting the width of the second heat dissipation structure 60 to be larger can ensure good heat dissipation effect of the second heat dissipation structure 60 while setting fewer second heat dissipation structures 60, thereby providing more space for setting the third pixel circuit DI3, multiple third sub-pixels PX3, and the third signal line L3.

[0094] In an implementation manner of this embodiment, as Figure 10 shown, when the display panel includes a transition area 03 and a second heat dissipation structure 60 is provided therein, and a third heat dissipation structure 50 is provided in the light transmission functional area 02, the second heat dissipation structure 60 can also be electrically connected to the third heat dissipation structure 50 to ensure the temperature uniformity everywhere in the transition area 03, so as to make the brightness uniformity everywhere in the transition area 03 and the consistency with the brightness of the light transmission functional area 01.

[0095] Figure 11 A cross-sectional view near a light-transmitting functional area in a display panel provided by an embodiment of the present application Figure 12 is Figure 11 a corresponding schematic plan view.

[0096] In an embodiment of the present application, the first heat dissipation structure 40 may be provided on the same layer as only one conductive film layer in the display panel.

[0097] In another embodiment of the present application, as Figure 11 and Figure 12 shown, the first heat dissipation structure 40 may be provided on the same layer as multiple conductive film layers in the display panel, such as being provided on the same layer as two conductive film layers.

[0098] In an implementation manner of the embodiment, at least two conductive film layers in the display panel include a metal conductive film layer and a transparent trace conductive film layer. Among them, the metal conductive film layer may be a conductive film layer including a first gate 211 / second gate 221 / third gate 231, a conductive film layer including a first source 212 / first drain 213 / second source 222 / second drain 223 / third source 232 / third drain 233, a conductive film layer including a first anode 112 / second anode 122 / third anode 132, and a conductive film layer including a touch trace 30, etc.; the transparent trace conductive film layer may include a conductive film layer including a first cathode 113 / second cathode 123 / third cathode 133, a conductive film layer including a touch electrode, etc.

[0099] Among them, as Figure 11 and Figure 12 shown, the first heat dissipation structure 40 includes a first part 40a provided on the same layer as the metal conductive film layer and a second part 40b provided on the same layer as the transparent trace conductive film layer. Then, the two heat dissipation channels provided by the first heat dissipation structure 40 for the second light-emitting layer 121 can dissipate heat quickly.

[0100] Furthermore, the first part 40a of the first heat dissipation structure 40 may be provided on the same layer as the second anode 122, and the second part 40b may be provided on the same layer as the second cathode 123. Since the second anode 122 and the second cathode 123 are respectively located on both sides of the second light-emitting layer 121, and the film layers where the second anode 122 and the second cathode 123 are located are closer to the film layer where the second light-emitting layer 121 is located than other conductive film layers, the first heat dissipation structure 40 can dissipate heat quickly.

[0101] Figure 13 A schematic diagram of a display device provided by an embodiment of the present application, as Figure 13As shown, the display device includes the display panel 001 provided in any one of the above embodiments. The display device provided in the embodiments of the present application may be a mobile phone. In addition, the display device provided in the embodiments of the present application may also be a display device such as a computer or a television.

[0102] As Figure 13 shown, the display device provided in the embodiments of the present application further includes an optical device 002, and the optical device 002 is disposed at the position of the light-transmitting functional area 02 corresponding to the display panel 001 of the display device. That is, along the thickness direction of the display panel 001, the optical device 002 is disposed below the light-transmitting functional area 02 of the display panel 001. Then the optical device 002 can emit light to the light-emitting surface side of the display panel 001 through the light-transmitting functional area 02, or can receive light from the light-emitting surface side of the display panel 001 through the light-transmitting functional area 02. Among them, the optical device 002 is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera, and a flashlight.

[0103] In the embodiments of the present application, a first heat dissipation structure 40 is disposed at the position of the display device corresponding to the light-transmitting functional area 02. Then the first heat dissipation structure 40 in the light-transmitting functional area 02 serves as the main heat dissipation component, and the first signal line L1 in the conventional display area 02 serves as the main heat dissipation component, so that the heat dissipation effects of the light-transmitting functional area 02 and the conventional display area 01 are basically the same, and further, the display difference problem caused by the temperature difference between the light-transmitting functional area 02 and the conventional display area 01 can be improved. In addition, since the first heat dissipation structure 40 in the display device provided in the embodiments of the present application is disposed on the same layer as at least one conductive film layer in the display panel, and no additional structure needs to be provided, it is easy to implement and does not increase the thickness of the display device.

[0104] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that, Comprising: A conventional display area in which a plurality of first sub-pixels are provided; A light-transmitting functional area, at least part of the conventional display area surrounding the light-transmitting functional area; A plurality of second sub-pixels are provided in the light-transmitting functional area; Wherein, along the thickness direction of the display panel, the display panel includes at least two conductive film layers; the light-transmitting functional area further includes a plurality of first heat dissipation structures, and the first heat dissipation structures are provided on the same layer as at least one of the at least two conductive film layers; The display panel further includes a transition area located between the conventional display area and the light-transmitting functional area; The edge of the light-transmitting functional area includes a third heat dissipation structure surrounding the light-transmitting functional area; the third heat dissipation structure is provided on the same layer as at least one of the at least two conductive film layers; All the first heat dissipation structures are electrically connected to the third heat dissipation structure; and / or, the transition area further includes a plurality of second heat dissipation structures, and all the second heat dissipation structures are electrically connected to the third heat dissipation structure; Wherein, the first heat dissipation structure is curved.

2. The display panel according to claim 1, characterized in that, The conventional display area includes a plurality of first pixel circuits and a plurality of first signal lines; the first pixel circuits in the conventional display area are correspondingly electrically connected to the first sub-pixels in the conventional display area and are electrically connected to the first signal lines in the conventional display area; The light-transmitting functional area includes a plurality of second pixel circuits and a plurality of second signal lines; the second pixel circuits in the light-transmitting functional area are correspondingly electrically connected to the second sub-pixels in the light-transmitting functional area and are electrically connected to the second signal lines in the light-transmitting functional area; Wherein, the density of the plurality of second pixel circuits in the light-transmitting functional area is less than the density of the plurality of first pixel circuits in the conventional display area, and the density of the plurality of second signal lines is less than the density of the plurality of first signal lines.

3. The display panel according to claim 1, characterized in that, The conventional display area includes a plurality of first pixel circuits and first signal lines, the first pixel circuits in the conventional display area are correspondingly electrically connected to the first sub-pixels in the conventional display area and are electrically connected to the first signal lines in the conventional display area; The transition area includes a plurality of third pixel circuits and third signal lines, the third pixel circuits in the transition area are electrically connected to the third signal lines in the transition area, and at least part of the third pixel circuits in the transition area are correspondingly electrically connected to the second sub-pixels in the light-transmitting functional area through a transparent conductive electrode.

4. The display panel according to claim 3, characterized in that, The second heat dissipation structure is provided on the same layer as at least one of the at least two conductive film layers.

5. The display panel according to claim 4, characterized in that, The density of the plurality of second heat dissipation structures is less than the density of the plurality of first heat dissipation structures.

6. The display panel according to claim 4, characterized in that, The width of the second heat dissipation structure is greater than the width of the first heat dissipation structure.

7. The display panel according to claim 1, characterized in that, In the direction from the conventional display area to the light-transmitting functional area, the density of the first heat dissipation structure gradually increases.

8. The display panel according to claim 1, characterized in that, At least three second sub-pixels of different emission colors form a light-emitting pixel; The display panel further includes a plurality of auxiliary heat dissipation structures, and the auxiliary heat dissipation structures surround the second sub-pixels; the auxiliary heat dissipation structures corresponding to different second sub-pixels in the same light-emitting pixel are electrically connected and are electrically connected to the first heat dissipation structure.

9. The display panel according to claim 1, characterized in that, Among the at least two conductive film layers, there are a metal conductive film layer and a transparent trace conductive film layer.

10. A display device, characterized in that, There is provided a display panel and an optical device as described in any one of claims 1-9, and the optical device is disposed at a position corresponding to the light-transmitting functional area of the display device.

11. The display device according to claim 10, characterized in that, The optical device is at least one of an optical fingerprint sensor, an iris recognition sensor, and a camera.

Images