Display panel and display device

Abstract

The application discloses a display panel and a display device, and relates to the technical field of display. In the display panel, a non-display area comprises a first area, a second area and a bending area between the first area and the second area, the second area comprises a binding area, a display area comprises a first display area, and the binding area and the first display area at least partially overlap in the thickness direction of the display panel. The display panel further comprises a plurality of light emitting elements, and the display panel further comprises a first signal line electrically connected to a pixel circuit in the light emitting elements. The light emitting elements comprise first color light emitting elements, and at least in the first display area, the orthographic projection of the first signal line on the plane where the display panel is located is located outside the periphery of the orthographic projection of the anode of the first color light emitting elements on the plane where the display panel is located. In this way, the influence of the first signal line on the light emitting layer in the first color light emitting elements when the first signal line generates a large amount of heat is reduced, and the problem that the light emitting layer in the first color light emitting elements is in contact with high temperature and material cracking occurs is avoided.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more particularly, to a display panel and a display device. Background Art

[0002] With the development of display technology, display devices (such as mobile phones, tablets, televisions, and wearable wristbands) have become widely used. Heat dissipation has always been a major issue facing display devices. If the high heat generated in the display device directly affects the light-emitting elements within the display device, the high temperature environment is very likely to cause the luminescent material in the light-emitting elements to decompose, thereby affecting the display quality of the display device and shortening the service life of the display panel. Summary of the Invention

[0003] In view of this, the present invention provides a display panel and a display device to prevent the heat generated by the first signal line from directly acting on the light-emitting element, thereby preventing the light-emitting layer in the first color light-emitting element from being exposed to high temperature and causing material decomposition.

[0004] In a first aspect, the present invention provides a display panel comprising a display area and a non-display area; the non-display area comprises a first area, a bending area, and a second area located on the same side of the display area, the bending area being located between the first area and the second area, and the second area comprising a binding area; the display area comprises a first display area, and the binding area at least partially overlaps with the first display area along a first direction, where the first direction is a thickness direction of the display panel;

[0005] The display panel also includes multiple sub-pixels, each of which includes an electrically connected pixel circuit and a light-emitting element. The display panel also includes a first signal line electrically connected to the pixel circuit, and the light-emitting element includes an anode, a light-emitting layer, and a cathode arranged along a first direction; the light-emitting element includes a first color light-emitting element, and at least in the first display area, the orthographic projection of the first signal line on the plane where the display panel is located is located outside the orthographic projection of the anode of the first color light-emitting element on the plane where the display panel is located.

[0006] In a second aspect, based on the same inventive concept, the present invention further provides a display device, comprising the display panel provided in the first aspect of the present invention.

[0007] Compared with the prior art, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0008] In the display panel and display device provided by the present invention, the second area in the non-display area is bent to the non-light-emitting surface of the display area through the bending area, so that the binding area on the second area at least partially overlaps with the first display area on the display area, and optionally, the binding area is bound with a driver chip. The sub-pixels in the display panel include electrically connected pixel circuits and light-emitting elements, and the first signal line is electrically connected to the pixel circuit for providing signals to the pixel circuit. The light-emitting element includes a first color light-emitting element, and at least in the first display area, the orthographic projection of the first signal line on the plane where the display panel is located is located outside the orthographic projection of the anode of the first color light-emitting element on the plane where the display panel is located. In the related art, when the first signal line does not bypass the first color light-emitting element, when the heat generated by the first color light-emitting element and the heat generated by the driver chip act on the first color light-emitting element, the light-emitting material in the first color light-emitting element is very likely to be decomposed. In the present invention, in the first display area, the first signal line is arranged on the periphery of the first color light-emitting element. In this way, even if the first signal line generates a large amount of heat, the heat will not directly act on the first color light-emitting element. Compared with the related art, the amount of heat acting on the first color light-emitting element is reduced, which is beneficial to reduce the possibility of decomposition of the light-emitting material of the first color light-emitting element, and avoid the impact of the decomposition of the light-emitting material on the display effect and life.

[0009] Of course, any product implementing the present invention does not necessarily need to achieve all of the above technical effects at the same time.

[0010] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0012] Figure 1 FIG2 is a top view of a display panel provided by an embodiment of the present invention;

[0013] Figure 2 Shown Figure 1 An AA cross-sectional view of the display panel;

[0014] Figure 3 Shown Figure 1 A BB cross-sectional view of the display panel;

[0015] Figure 4 FIG. 1 is a diagram showing an arrangement relationship between light-emitting elements and first signal lines in a display panel;

[0016] Figure 5 FIG. 1 is a diagram showing an arrangement relationship between a light emitting element and a first signal line in the related art;

[0017] Figure 6 Shown Figure 5 An FF cross-sectional view;

[0018] Figure 7 Shown Figure 4 A GG cross-sectional view;

[0019] Figure 8 FIG2 is a schematic structural diagram of a pixel circuit provided by an embodiment of the present invention;

[0020] Figure 9 Shown with Figure 8 Corresponding layout diagram;

[0021] Figure 10 Shown Figure 8 A driving timing diagram of the pixel circuit;

[0022] Figure 11 Shown is a schematic diagram of an arrangement of a light emitting element, a data line and a first power signal line;

[0023] Figure 12 Shown Figure 11 A CC cross-sectional view;

[0024] Figure 13 Shown Figure 1 A DD-direction cross-sectional view of the display panel;

[0025] Figure 14 Shown is a schematic diagram of wiring of the first signal line in the first display area and the second display area;

[0026] Figure 15 FIG. 1 shows a relative position relationship diagram of the second signal line and the light emitting element;

[0027] Figure 16 FIG2 is a schematic diagram showing a connection between data lines and fan-out lines in a display panel provided by an embodiment of the present invention;

[0028] Figure 17 shown Figure 16 A schematic diagram of the arrangement of the data line, the first power signal line and the connecting line;

[0029] Figure 18 FIG. 1 shows another arrangement relationship diagram of the light-emitting elements and the first signal lines in the display panel;

[0030] Figure 19 FIG. 1 shows another arrangement relationship diagram of the light-emitting elements and the first signal lines in the display panel;

[0031] Figure 20FIG2 is another top view of a display panel provided by an embodiment of the present invention;

[0032] Figure 21 Shown is a schematic diagram of the relative positions of some first color light emitting elements and the first signal line in the first display area and the transition area;

[0033] Figure 22 Shown Figure 1 Another DD-direction cross-sectional view of the display panel;

[0034] Figure 23 Shown Figure 1 Another DD-direction cross-sectional view of the display panel;

[0035] Figure 24 Shown Figure 1 Another DD-direction cross-sectional view of the display panel;

[0036] Figure 25 Shown Figure 1 An EE-direction cross-sectional view of the display panel;

[0037] Figure 26 Shown Figure 1 Another EE-direction cross-sectional view of the display panel;

[0038] Figure 27 FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0039] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0040] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0041] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0042] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0043] It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the present invention. Therefore, the present invention is intended to cover modifications and variations of the present invention that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the embodiments provided in the embodiments of the present invention may be combined with each other unless there is any contradiction.

[0044] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] The present invention provides a display panel, comprising a display area and a non-display area; the non-display area comprises a first area, a bending area, and a second area located on the same side of the display area, the bending area is located between the first area and the second area, and the second area comprises a binding area; the display area comprises a first display area, and along a first direction, the binding area at least partially overlaps with the first display area, and the first direction is the thickness direction of the display panel; the display panel further comprises a plurality of light-emitting elements, the light-emitting elements comprising electrically connected pixel circuits and light-emitting elements, the display panel further comprises a first signal line electrically connected to the pixel circuit, the light-emitting elements comprising an anode, a light-emitting layer, and a cathode arranged along the first direction; the light-emitting elements comprise first-color light-emitting elements, and at least in the first display area, the orthographic projection of the first signal line on the plane where the display panel is located is located at the periphery of the orthographic projection of the anode of the first-color light-emitting element on the plane where the display panel is located. In the first display area, by arranging the first signal line at the periphery of the first color light-emitting element, the heat generated by the first signal line is prevented from directly acting on the light-emitting layer of the first color light-emitting element. This is beneficial to reducing the impact of severe heat generation of the first signal line on the light-emitting layer in the first color light-emitting element, and avoiding the problem of material decomposition of the light-emitting layer in the first color light-emitting element due to exposure to high temperature, thereby avoiding the problem of material decomposition of the light-emitting layer affecting the display effect and life.

[0046] The above is the core concept of the present invention. The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the embodiments of the present invention.

[0047] Figure 1 FIG. 1 is a top view of a display panel provided by an embodiment of the present invention. Figure 2 Shown Figure 1 An AA cross-section of the display panel is shown in the figure. Figure 3 Shown Figure 1 A BB cross-section of the display panel. Figure 4The figure shows an arrangement relationship diagram of the light-emitting elements and the first signal lines in the display panel.

[0048] It should be noted that Figure 1 The rectangular display panel is used as an example for description, and the shape of the display panel is not limited. In some other embodiments of the present invention, the shape of the display panel may also be other shapes, such as a rounded rectangle, a circle, or other feasible shapes. Figure 1 The light-emitting elements included in the display panel are merely illustrated, and the number, arrangement, shape and size of the light-emitting elements actually included in the display panel are not limited. Figure 2 Only the relative positional relationship among the first area, the bending area, and the second area in the display panel is illustrated, and the actual film layer structures of the first area, the bending area, and the second area are not limited.

[0049] Please refer to Figures 1 to 4 The present invention provides a display panel 100, comprising a display area 10 and a non-display area 20; the non-display area 20 comprises a first area 21, a bending area 23, and a second area 22 located on the same side of the display area 10, the bending area 23 being located between the first area 21 and the second area 22, and the second area 22 comprising a binding area A0; the display area 10 comprises a first display area A1, and the binding area A0 at least partially overlaps with the first display area A1 along a first direction D1, where the first direction D1 is the thickness direction of the display panel;

[0050] The display panel also includes multiple sub-pixels, each of which includes an electrically connected pixel circuit and a light-emitting element 30. The display panel also includes a first signal line L1 electrically connected to the pixel circuit. The light-emitting element 30 includes an anode 301, a light-emitting layer 302, and a cathode 303 arranged along a first direction. The light-emitting element 30 includes a first color light-emitting element 31. At least in the first display area A1, the orthographic projection of the first signal line L1 on the plane where the display panel is located is located outside the orthographic projection of the anode 301 of the first color light-emitting element 31 on the plane where the display panel is located.

[0051] Optionally, the display panel provided in this embodiment can be a display panel using organic light-emitting diode display technology, that is, an OLED (Organic Light-Emitting Diode) display panel. The basic structure of the light-emitting functional layer of the OLED display panel includes an anode 301, a light-emitting layer 302 and a cathode 303. When the power supply supplies an appropriate voltage, the holes in the anode 301 and the electrons in the cathode 303 will combine in the light-emitting material layer to generate bright light. Optionally, an encapsulation layer 80 is further provided on the side of the cathode 303 away from the anode 301. Compared with thin-film field-effect transistor liquid crystal displays, OLED display devices have the characteristics of high visibility and high brightness, and are more power-saving, lightweight and thin. Of course, in some other embodiments of the present invention, the display panel can also be a display panel using inorganic light-emitting diode display technology, such as a Micro LED display panel, or a Mini LED display panel, etc. Figure 3 Only the OLED display panel is used for illustration.

[0052] Continue to refer Figure 1 and Figure 2 In the display panel provided in the embodiment of the present invention, the second area 22 in the non-display area 20 is bent to the non-light-emitting surface of the display area 10 through the bending area 23, so that the binding area A0 on the second area 22 is at least partially overlapped with the first display area A1 on the display area 10. Optionally, the binding area A0 is bound to a driver chip 90. The sub-pixels in the display panel include an electrically connected pixel circuit and a light-emitting element 30. The first signal line L1 is electrically connected to the pixel circuit for providing a signal to the pixel circuit. It should be noted that the pixel circuit connected to the light-emitting element 30 can refer to the pixel circuit in the related art. The present invention does not specifically limit this. In the subsequent embodiments, a feasible pixel circuit will be used as an example for explanation.

[0053] Due to the inherent properties of luminescent materials, different materials may have different tolerances to temperature and corresponding cracking temperatures. When the ambient temperature exceeds the cracking temperature of the material itself, the luminescent material will crack and fail to function properly. When different-colored light-emitting elements in a display panel are made of different luminescent materials, the corresponding cracking temperatures of the different-colored light-emitting elements will also be different. When the display panel in an embodiment of the present invention includes light-emitting elements of multiple colors, the light-emitting material of the first-colored light-emitting element can be considered the light-emitting material with the lowest cracking temperature. In other words, if the display panel includes three-colored light-emitting elements, the first-colored light-emitting element is most susceptible to high temperatures.

[0054] Continue to refer Figures 1 to 4In the embodiment of the present invention, the light-emitting element 30 includes a first color light-emitting element 31. At least in the first display area A1, the orthographic projection of the first signal line L1 on the plane where the display panel is located is located outside the orthographic projection of the anode 301 of the first color light-emitting element 31 on the plane where the display panel is located. In other words, the orthographic projection of the first signal line L1 on the plane where the display panel is located does not overlap with the orthographic projection of the first color light-emitting element 31 on the plane where the display panel is located. The first signal line L1 detours at the location of the first color light-emitting element 31. In the related art, when the first signal line L1' does not detour the first color light-emitting element 31', for example, please refer to Figure 5 and Figure 6 In the first display area A1', the orthographic projection of the first color light-emitting element 31' on the plane where the display panel is located overlaps with the orthographic projection of the first signal line L1' on the plane where the display panel is located. When the heat generated by the first color light-emitting element 31' and the heat generated by the driver chip act on the first color light-emitting element 31', the light-emitting material in the first color light-emitting element 31' is very likely to be decomposed. Figure 5 FIG. 1 shows an arrangement relationship diagram of a light emitting element and a first signal line in the related art. Figure 6 Shown Figure 5 In the present invention, please refer to Figure 4 and Figure 7 ,in, Figure 7 Shown Figure 4 In a GG cross-sectional view, in the first display area A1, the first signal line L1 is arranged on the periphery of the first color light-emitting element 31. Compared with the solution of arranging the first signal line L1 directly below the anode of the first color light-emitting element 31, the heat transfer path is increased. Specifically, when the first signal line L1 is arranged directly below the anode of the first color light-emitting element 31, for example, please refer to Figure 6 The distance between the anode and the first signal line L1 is a vertical distance S01. If the first signal line L1 is set at the periphery of the orthographic projection of the first color light emitting element 31 on the light emitting surface of the display panel, the distance between the first signal line L1 and the anode is an inclined distance S02. For example, please refer to Figure 7, the inclined distance S02 is greater than the above-mentioned vertical distance S01. In this way, even if the first signal line L1 generates a large amount of heat, the heat will be attenuated during the transmission process. When the heat is transferred from the first signal line L1 to the position of the anode 301, the heat attenuation will also become larger due to the longer path. Therefore, the aforementioned large amount of heat will not directly act on the first color light-emitting element 31. Compared with the related art, the amount of heat acting on the first color light-emitting element 31 is reduced. Even if the heat generated by the driving chip can act on the first color light-emitting element 31, the heat generated by the driving chip and the heat generated by the first signal line L1 are superimposed and then act on the first color light-emitting element 31. The heat will also be reduced, which is beneficial to reduce the possibility of decomposition of the light-emitting material of the first color light-emitting element 31, and avoid the impact of the decomposition of the light-emitting material on the display effect and life of the display panel.

[0055] Figure 8 FIG. 1 is a schematic structural diagram of a pixel circuit provided by an embodiment of the present invention. Figure 9 Shown with Figure 8 Corresponding to the layout diagram, this embodiment shows a connection relationship between the pixel circuit and the data line DL and the first power signal line PVDD. Figure 10 Shown Figure 8 A driving timing diagram of the pixel circuit. Figure 11 The figure shows a schematic diagram of an arrangement of the light emitting element, the data line DL and the first power signal line PVDD. It should be noted that, in order to clearly distinguish the data line DL from the first power signal line PVDD, Figure 11 The data line DL and the first power signal line PVDD are illustrated with different line widths, but the actual line widths of the data line DL and the first power signal line PVDD are not limited. In actual products, the line widths of the two may be the same or different, and the present invention does not make specific limitations on this.

[0056] Please refer to Figure 8 、 Figure 9 and Figure 11 In an optional embodiment of the present invention, the display panel includes a data line DL and a first power signal line PVDD, and the first signal line L1 includes at least one of the data line DL and the first power signal line PVDD.

[0057] It can be understood that a plurality of data lines DL and a plurality of first power signal lines PVDD are usually provided in the display panel, and the pixel circuit for driving the light-emitting element 30 to emit light is electrically connected to the data line DL and the first power signal line PVDD, obtains the data signal and the first power signal, and finally generates a driving current or driving voltage for driving the light-emitting element 30 to emit light.

[0058] Figure 8 and Figure 9The illustrated embodiment is a pixel circuit with a 7T1C (7 transistors and 1 capacitor) structure. This does not limit the structure of the pixel circuit in the present invention. In some other embodiments of the present invention, the pixel circuit may also be embodied as another structure such as 8T1C. Figure 8 Taking the pixel circuit shown as an example, the pixel circuit includes a driving transistor T0, first to sixth transistors T1 to T6, and a storage capacitor C0. Optionally, the gate of the driving transistor T0 is connected to the first node N1, the first electrode is connected to the second node N2, and the second electrode is connected to the third node N3. The light-emitting element 30 is connected in series between the fourth node N4 and the second power supply terminal PVEE. The first transistor T1 is connected in series between the first reset terminal Vref1 and the first node N1, the second transistor T2 is connected in series between the data signal line DL and the second node N2; the third transistor T3 is connected in series between the first node N1 and the third node N3; the fourth transistor T4 is connected in series between the second reset terminal Vref2 and the fourth node N4; the fifth transistor T5 is connected in series between the first power supply terminal PVDD and the second node N2, and the sixth transistor T6 is connected in series between the third node N3 and the fourth node N4; and the storage capacitor C0 is connected in series between the first power supply terminal PVDD and the first node N1.

[0059] Optionally, continue to refer to Figure 8 and Figure 10The pixel circuit operates in a first reset phase t1, a data writing phase t2, and a light-emitting phase t3. During the first reset phase t1, the first transistor T1 is turned on in response to the on-state level of the first control terminal S1 and transmits the reset signal of the first reset terminal VreD1 to the first node N1. During the data writing phase t2, the second transistor T2 is turned on in response to the on-state level of the second control terminal S2 and the third transistor T3 is turned on in response to the on-state level of the second control terminal S2. The data signal on the data signal line DL is transmitted to the second node N2. The signal of the second node N2 is transmitted to the third node N3 via the driving transistor T0, and the signal of the third node N3 is transmitted to the first node N1. The fourth transistor T4 is turned on in response to the on-state level of the second control terminal S2 and transmits the reset signal of the second reset terminal Vref2 to the fourth node N4, thereby resetting the anode of the light-emitting element 30. In the light-emitting stage t3, the fifth transistor T5 and the sixth transistor T6 are turned on in response to the signal of the light-emitting control signal terminal Emit, and the signal on the first power signal line PVDD is transmitted to the fifth transistor T5 through the first power terminal. The first driving transistor T0 transmits the driving signal to the light-emitting element 30, driving the light-emitting element 30 to emit light. It should be noted that the first reset stage and the second reset stage can be carried out simultaneously or in a time-sharing manner. The reset voltages of the first reset stage and the second reset stage can be the same or different, and the embodiment of the present invention does not specifically limit this. When the reset voltages are the same, the first reset terminal VreD1 and the second reset terminal Vref2 can be reflected as the same signal terminal. The working process of the above-mentioned pixel driving circuit is also only for illustration and does not limit the actual working process of the pixel driving circuit of the present invention.

[0060] It should be noted that the above-mentioned pixel driving circuit and working process are only for illustration and do not limit the actual pixel driving circuit and working process included in the display panel.

[0061] Continue to combine Figure 3 、 Figure 8 and Figure 11 The signals transmitted by the data lines DL and the first power signal line PVDD connected to the pixel circuit are relatively high current signals. When these high current signals pass through the first power signal line PVDD and the data line DL, they can cause significant heating of the first power signal line PVDD and the data line DL. In the embodiment of the present invention, when the first signal line L1 includes the data line DL, since the luminescent material corresponding to the first-color light-emitting element is most susceptible to high temperatures, disposing the data line DL outside the anode 301 of the first-color light-emitting element 31 in the first display area A1 helps reduce the impact of heat generated by the data line DL on the luminescent material of the luminescent layer 302 corresponding to the first-color light-emitting element 31, thereby ensuring the normal display function of the first-color light-emitting element.

[0062] When the first signal line L1 mentioned in the embodiment of the present invention includes the first power signal line PVDD, in the first display area A1, the first power signal line PVDD is set at the periphery of the anode 301 of the first color light-emitting element 31, which is beneficial to reduce the influence of the heat generated by the first power signal line PVDD on the light-emitting material of the light-emitting layer 302 corresponding to the first color light-emitting element 31.

[0063] In the first display area A1, when the data line DL and the first power signal line PVDD are both arranged around the anode 301 of the first color light-emitting element 31, the large heat generated by the data line DL and the first power signal line PVDD will not directly act on the light-emitting layer 302 of the first color light-emitting element 31, thereby further reducing the heat acting on the first color light-emitting element 31 and further preventing the light-emitting layer 302 of the first color light-emitting element 31 from being decomposed, which may cause display abnormalities on the display panel. It should be noted that Figure 11 A solution is shown in which the first signal line L1 includes both the data line DL and the first power signal line PVDD. In some other embodiments of the present invention, the first signal line L1 may also include only the data line DL, or only the first power signal line PVDD. The present invention does not specifically limit this.

[0064] Figure 12 Shown Figure 11 It should be noted that this figure only illustrates a film layer structure of the data line DL and the first power signal line PVDD, and does not show other structures in this area.

[0065] Please refer to Figure 12 In an optional embodiment of the present invention, in the first display area A1, the data line DL and the first power signal line PVDD are arranged in different layers.

[0066] Please combine Figure 3 、 Figure 11 and Figure 12 When at least one of the data line DL and the first signal line L1 is wired in a winding manner around the anode 301 of the first color light-emitting element 31, the winding wiring method occupies a larger space in the display panel than the method of wiring in a straight line extending in the same direction. To avoid a short circuit between the data line DL and the first power signal line PVDD, the embodiment of the present invention can set the data line DL and the first power signal line PVDD in different film layers. In this way, even if the data line DL and the first power signal line PVDD are both wired in a winding manner around the periphery of the anode 301 of the first color light-emitting element in the first display area A1, the wiring of the two will not interfere with each other, which helps to simplify the manufacturing difficulty of the data line DL and the first power signal line PVDD. It should be noted that Figure 12 Only one film layer structure of the data line DL and the first power signal line PVDD on the display panel is illustrated, and the specific film layer positions of the two are not limited. Subsequent embodiments will introduce feasible film layer positions of the two.

[0067] Figure 13 Shown Figure 1 A DD-direction cross-section of the display panel, please refer to Figure 11 、 Figure 12 、 Figure 13 and Figure 10 In an optional embodiment of the present invention, the display panel includes a substrate 00 and a first metal layer M1, a capacitor metal layer MC, a second metal layer M2, and a third metal layer M3 arranged on one side of the substrate 00. Along a first direction D1, the capacitor metal layer MC is located on a side of the first metal layer M1 facing away from the substrate, and the second metal layer M2 is located on a side of the capacitor metal layer MC facing away from the substrate; the third metal layer M3 is located between the second metal layer M2 and the light-emitting element 30; the data line DL is located on one of the second metal layer M2, the capacitor metal layer MC, and the third metal layer M3; and the first power signal line PVDD is located on the other of the second metal layer M2, the capacitor metal layer MC, and the third metal layer M3.

[0068] Optionally, the display panel further includes a semiconductor layer poly, which is located on the side of the first metal layer M1 facing away from the substrate 00, or on the side of the first metal layer M1 facing the substrate 00. The first metal layer M1 may be, for example, a gate metal layer, and the gate of the transistor in the display panel may be provided on the first metal layer M1; the capacitor metal layer MC is used to form a capacitor structure with the first metal layer M1 or the second metal layer M2. The source electrode S and the drain electrode D of the transistor in the display panel may be located on the second metal layer M2, and the semiconductor layer poly includes a source region and a drain region, and the source region and the drain region are formed by doping N-type impurity ions or P-type impurity ions. The source electrode S of the transistor is electrically connected to the source region of the semiconductor layer poly through a contact hole, and the drain electrode D of the transistor is electrically connected to the drain region of the semiconductor layer poly through a contact hole.

[0069] Specifically, in the display panel provided in this embodiment, four metal layers are provided between the substrate 00 and the light-emitting element 30, namely, the first metal layer M1, the capacitor metal layer MC, the second metal layer M2, and the third metal layer M3. When the data line DL and the first power signal line PVDD are provided in different layers, the data line DL can be provided in one of the above four metal layers, and the first power signal line PVDD can be provided in one of the remaining three metal layers. For example, the data line DL can be provided in the second metal layer M2 or the third metal layer M3, preferably in the second metal layer M2, while the first power signal line PVDD can be provided in the capacitor metal layer MC or the first metal layer M1. Figure 10 The illustrated embodiment shows a solution in which the data line DL is disposed on the second metal layer M2 and the first power signal line PVDD is disposed on the capacitor metal layer MC. In this case, the first power signal line PVDD and the data line DL are both vertically farther from the light-emitting element 30. Moreover, the first power signal line PVDD is further away from the light-emitting element 30 than the data line DL. This increases the transmission path of heat generated by the first power signal line PVDD to the light-emitting element 30, thereby further facilitating the reduction of heat applied to the light-emitting layer 302 of the light-emitting element 30. Of course, to maximize the heat transmission path to the light-emitting element 30, the first power signal line PVDD and the data line DL can also be disposed on the capacitor metal layer MC and the first metal layer M1, respectively, which are farther away from the light-emitting element 30. This is not specifically limited in the present invention.

[0070] Continue to refer Figure 11 In an optional embodiment of the present invention, in the first display area A1, the first signal line L1 includes multiple end-to-end connected sub-segments L00, and at least some of the sub-segments L00 are wired along the outline of the anode 301 of the first color light-emitting element 31.

[0071] Specifically, this embodiment uses the example of a diamond-shaped orthographic projection of the anode of the first-color light-emitting element 31 on the display panel. When the first signal line L1 is positioned outside the orthographic projection of the anode 301 of the first-color light-emitting element 31 on the display panel, the sub-segment L00 of the first signal line L1 is routed along the outer edge of the diamond-shaped structure, forming a sawtooth-like structure. This routing arrangement helps reduce the winding length of the first signal line L1 and minimizes the length differences between different first signal lines L1. When the first signal line L1 in the first display area A1 is arranged in a winding manner, the length of the first signal line L1 is extended, resulting in a longer length of the first signal line L1 that passes through the first display area A1 than the first signal line L1 that does not pass through the first display area A1. When the lengths of the first signal lines L1 vary, the coupling capacitance between the first signal line L1 and other conductive film layers also varies. In an embodiment of the present invention, in the first display area, wiring the first signal line L1 along the anode of the first color light-emitting element 31 is beneficial to minimizing the length difference between different first signal lines L1 as much as possible, and further helps to reduce the coupling capacitance difference between different first signal lines L1 and their conductive film layers, thereby helping to improve the uniformity of the signals transmitted by different first signal lines L1.

[0072] Figure 14 The figure shows a wiring diagram of the first signal line L1 in the first display area A1 and the second display area A2. Figure 1 and Figure 14 This embodiment shows a relative positional relationship between the first display area A1 and the second display area A2 in the display panel. Optionally, the second display area A2 can be regarded as the area of ​​the display area other than the first display area A1.

[0073] Please refer to Figure 1 and Figure 14 In an optional embodiment of the present invention, the display panel further includes a second display area A2 arranged outside the first display area A1, the first signal line L1 includes a first line segment L11 located in the first display area A1 and a second line segment L12 located in the second display area A2, and the line width of the first line segment L11 is smaller than the line width of the second line segment L12.

[0074] Specifically, when the first signal line L1 does not pass through the first display area A1, that is, when the orthographic projection of the first signal on the display panel does not overlap with the first display area A1, this part of the first signal line L1 is wired in a straight line; when the first signal line L1 passes through the first display area A1, that is, when the orthographic projection of the first signal line L1 on the display panel overlaps with the first display area A1, the part of the first signal line L1 located in the first display area A1 is wired in a winding manner, so that the length of the first signal line L1 passing through the first display area A1 is greater than the length of the first signal line L1 not passing through the first display area A1. When different first signal lines L1 are set with equal line width, the coupling capacitance formed between the first signal line L1 passing through the first display area A1 and other conductive film layers will be greater than the coupling capacitance between the first signal line L1 not passing through the first display area A1 and other film layers. To this end, an embodiment of the present invention has made a differentiated design for the line width of the first signal line L1 passing through the first display area A1. Specifically, the line width of the first line segment L11 in the first signal line L1 located in the first display area A1 is set to be smaller than the line width of the second line segment L12 located in the second display area A2. In this way, the coupling capacitance formed between the first line segment L11 and the other conductive film layer will be smaller, thereby reducing the overall coupling capacitance value formed between the first signal line L1 passing through the first display area A1 and the other conductive film layer, and narrowing the difference in coupling capacitance between different first signal lines L1 and the other conductive film layers, which is beneficial to improving the uniformity of the signals transmitted by different first signal lines L1.

[0075] Figure 15 FIG. 1 shows a relative position relationship diagram of the second signal line L2 and the light emitting element.

[0076] Please refer to Figure 13 and Figure 15 In an optional embodiment of the present invention, the display panel includes a substrate 00 and a first metal layer M1, a capacitor metal layer MC, a second metal layer M2, a third metal layer M3 and a fourth metal layer M4 arranged on one side of the substrate 00, along the first direction D1, the capacitor metal layer MC is located on the side of the first metal layer M1 away from the substrate, and the second metal layer M2 is located on the side of the capacitor metal layer MC away from the substrate; the third metal layer M3 is located between the second metal layer M2 and the fourth metal layer M4, and the fourth metal layer M4 is located on the side of the light-emitting element 30 facing the substrate; the display panel also includes a plurality of second signal lines L2, the second signal lines L2 are located in the fourth metal layer M4, and at least some of the second signal lines L2 are located in the first display area A1; in the first display area A1, the orthographic projection of the second signal line L2 on the plane where the display panel is located is located outside the orthographic projection of the anode 301 of the first color light-emitting element 31 on the plane where the display panel is located.

[0077] For details, please refer to Figure 13 and Figure 15 The fourth metal layer M4 where the second signal line L2 is located is the metal layer closest to the light-emitting element 30 among the first metal layer M1, the capacitor metal layer MC, the second metal layer M2, the third metal layer M3, and the fourth metal layer M4. The heat emitted by the second signal line L2 has a greater impact on the light-emitting element 30. To this end, in the embodiment of the present invention, the portion of the second signal line L2 in the first display area A1 is arranged at the periphery of the orthographic projection of the anode 301 of the first color light-emitting element 31 on the plane where the display panel is located, thereby increasing the path for the heat generated on the second signal line L2 to be transmitted to the anode 301 of the first color light-emitting element 31. This is conducive to reducing the impact of the heat generated on the second signal line L2 on the light-emitting layer 302 of the second color light-emitting element 32, and reducing the heat received by the first color light-emitting element 31 as a whole. Therefore, it is conducive to avoiding the phenomenon of cracking of the light-emitting layer 302 of the first color light-emitting element 31 due to high temperature, and further helps to avoid the problem of abnormal display of the display panel.

[0078] Figure 16 FIG. 1 is a schematic diagram showing a connection between a data line DL and a fan-out line SL in a display panel provided by an embodiment of the present invention. Figure 17 Shown Figure 16 A schematic diagram of the arrangement of the data line, the first power signal line and the connecting line.

[0079] In an optional embodiment of the present invention, the display area 10 includes a first display area AA1 and a second display area AA2, and the second display area AA2 is located on at least one side of the first display area AA1 along the second direction F2; the first display area AA1 and the second display area AA2 both include a plurality of data lines DL extending along a third direction F3 and arranged along the second direction F2, and the second direction F2 intersects with the third direction F3; the non-display area 20 includes a fan-out line SL, and the data line DL is electrically connected to the fan-out line SL; wherein the data line DL in the second display area AA2 is electrically connected to the fan-out line SL through the connecting line L0; the second signal line L2 includes the connecting line L0.

[0080] Figure 16 The data lines DL and fan-out lines SL included in the display panel are merely illustrated, and the number of data lines DL and fan-out lines SL actually included in the display panel is not limited. Figure 16 The number of data lines DL included in the first display area AA1 and the second display area AA2 is only for illustration and does not represent the actual number of data lines DL included in the first display area AA1 and the second display area AA2.

[0081] In the display panel provided by the embodiment of the present invention, the second display area AA2 in the display area is located on at least one side of the first display area AA1 along the second direction F2, and a fan-out trace is provided in the non-display area 20. The data line DL in the first display area AA1 directly extends to the position of the fan-out trace and is electrically connected to the fan-out trace SL. The data line DL in the second display area AA2 is electrically connected to the fan-out trace SL through the connecting trace L0 located in the display area. In the connecting trace L0 corresponding to the data line DL in the second display area AA2, a part of the line segment is located in the second display area AA2 for electrically connecting to the data line DL of the second display area AA2, and the other part of the line segment is located in the first display area AA1 for electrically connecting to the fan-out trace SL. These two part of the line segments are electrically connected to each other. In this way, there is no need to arrange the fan-out trace SL near the lower left frame and / or lower right frame of the display panel, thereby providing compressed space for the frame of the display panel, which is conducive to realizing the narrow frame design of the display panel. Please combine Figure 16 as well as Figure 17 Optionally, the connecting trace L0 is located in the fourth metal layer M4, and the second signal line L2 located in the fourth metal layer M4 includes the connecting trace L0. That is, to achieve a narrow-frame design for the display panel, the connecting trace L0 is introduced on the display panel. When the connecting trace L0 passes through the first display area A1, the portion of the connecting trace L0 in the first display area A1 can be routed in a winding manner to prevent the connecting trace L0 in the first display area A1 from overlapping with the anode of the first color light-emitting element 31. This can reduce the amount of heat transferred from the connecting trace L0 to the first color light-emitting element 31, thereby reducing the overall heating of the first color light-emitting element 31 and preventing cracking due to excessive temperature.

[0082] Please refer to Figure 4 In an optional embodiment of the present invention, the light-emitting element 30 further includes a second color light-emitting element 32 and a third color light-emitting element 33, wherein the decomposition temperature of the material of the light-emitting layer 302 in the first color light-emitting element 31 is T1, the decomposition temperature of the material of the light-emitting layer 302 in the second color light-emitting element 32 is T2, and the decomposition temperature of the material of the light-emitting layer 302 in the third color light-emitting element 33 is T3, wherein T1<T2, and T1<T3.

[0083] Specifically, because the luminescent material of the first-color light-emitting element 31 has the lowest decomposition temperature, it is more sensitive to high temperatures. That is, under the same high temperature environment, the luminescent material of the first-color light-emitting element 31 is most likely to decompose. Therefore, in the embodiment of the present invention, when laying out the first signal line L1 in the first display area A1, the first signal line L1 is prevented from passing through the area where the first-color light-emitting element 31 is located. Instead, the first signal line L1 is arranged around the anode 301 of the first-color light-emitting element 31 to reduce the heat applied to the first-color light-emitting element 31 and prevent decomposition of the light-emitting layer 302 of the first-color light-emitting element 31. Optionally, the first-color light-emitting element 31 is a blue light-emitting element, the second-color light-emitting element 32 is a green light-emitting element, and the third-color light-emitting element 33 is a red light-emitting element. It should be noted that this embodiment is illustrative only of the blue light-emitting element having the lowest decomposition temperature. In other embodiments of the present invention, due to differences in the luminescent materials, the decomposition temperature of the blue light-emitting element may be higher than that of the light-emitting elements of other colors. This is not specifically limited by the present invention.

[0084] Figure 18 The figure shows another arrangement diagram of the light-emitting elements and the first signal line in the display panel. This embodiment shows another winding method of the first signal line L1 when the first color light-emitting element 31, the second color light-emitting element 32 and the third color light-emitting element 33 are simultaneously provided in the first display area A1.

[0085] Please refer to Figure 18 In an optional embodiment of the present invention, T2<T3, in the first display area A1, the orthographic projection of the first signal line L1 on the plane where the display panel is located is located outside the orthographic projection of the anode of the second color light-emitting element 32 on the plane where the display panel is located.

[0086] Specifically, when the decomposition temperature T2 of the light-emitting layer 302 of the second color light-emitting element 32 is lower than the decomposition temperature of the light-emitting layer 302 of the third color light-emitting element 33, the light-emitting layer 302 of the second color light-emitting element 32 is more easily decomposed than the light-emitting layer 302 of the third color light-emitting element 33. Therefore, when the first signal line L1 is laid out in the first display area A1, the first signal line L1 bypasses the first color light-emitting element 31 and the second color light-emitting element 32 at the same time, which is beneficial to reduce the heat acting on the light-emitting layer 302 of the first color light-emitting element 31 and the second color light-emitting element 32, and avoid the decomposition of the light-emitting layer 302 of the first color light-emitting element 31 and the second color light-emitting element 32.

[0087] Figure 19The figure shows another arrangement relationship diagram of the light-emitting elements and the first signal line in the display panel. This embodiment shows another winding method of the first signal line L1 when the first color light-emitting element 31, the second color light-emitting element 32 and the third color light-emitting element 33 are simultaneously provided in the first display area A1.

[0088] Please refer to Figure 18 In an optional embodiment of the present invention, in the first display area A1, along the first direction, the first signal line L1 does not overlap with the first color light emitting element 31, the second color light emitting element 32 and the third color light emitting element 33.

[0089] Specifically, this embodiment shows a solution in which the first signal line L1 located in the first display area A1 is wired around each light-emitting element 30. In this way, the first signal line L1 will not be set directly under each light-emitting element 30 in the first display area A1, and the heat emitted by each first signal line L1 will not directly act on each light-emitting element 30, thereby reducing the amount of heat received by each light-emitting element 30 in the first display area A1, thereby reducing the phenomenon of the light-emitting layer 302 of the light-emitting element 30 being cracked due to heat.

[0090] It should be noted that the pixel arrangement shown in the drawings of the embodiments of the present invention is for illustration only and does not limit the specific shape, size and arrangement of the light-emitting elements 30 .

[0091] Figure 20 FIG. 1 is another top view of a display panel provided by an embodiment of the present invention. Figure 21 FIG. 1 is a schematic diagram showing relative positions of some first color light emitting elements 31 and the first signal line L1 in the first display area A1 and the transition area A12 .

[0092] Please refer to Figure 20 and Figure 21 In an optional embodiment of the present invention, the display area 10 further includes a transition area A12 arranged around the first display area A1. In the transition area A12, the orthographic projection of the first signal line L1 on the plane where the display panel is located is located outside the orthographic projection of the anode 301 of the first color light-emitting element 31 on the plane where the display panel is located.

[0093] Optionally, combine Figure 1 and Figure 2The binding area A0 and the first display area A1's orthographic projection on the display panel's plane overlap. When the driver chip 90 is bound to the binding area A0, some of the heat generated by the driver chip 90 is directly transferred to the first display area A1 of the display area 10. Due to the thermal radiation effect, some of the heat is transferred to the transition area A12 outside the first display area A1. To avoid the problem of high heat generation in the peripheral area due to the combined heat of the driver chip 90 and the first signal line L1, the first signal line L1 in the transition area A12 is arranged in a winding manner in the embodiment of the present invention. Figure 21 Only the first signal line L1 in the transition area A12 and the first display area A1 is illustrated. The specific winding method of the first signal line L1 in the transition area A12 can be referred to. Figure 19 The winding method of the first signal line L1 in the first display area A1 can prevent the first signal line L1 from passing through the first color light-emitting element 31 in the transition area A12. In other words, it can prevent the first signal line L1 from being located directly below the first color light-emitting element 31 in the transition area A12, thereby helping to reduce the heat applied by the first signal line L1 to the light-emitting layer 302 of the first color light-emitting element 31. Even if some heat generated by the driver chip 90 acts on the light-emitting layer 302 of the first color light-emitting element 31, the superposition of this partial heat and the heat of the first signal line L1 is insufficient to reach the cracking temperature of the light-emitting layer 302 of the first color light-emitting element 31. Therefore, it is helpful to avoid the problem of cracking of the light-emitting layer 302 of the first color light-emitting element 31 in the transition area A12, and thus help to avoid the problem of display abnormality in the transition area A12 due to the cracking of the light-emitting layer 302.

[0094] Continue to refer Figure 20 In an optional embodiment of the present invention, the width between the edge of the first display area A1 and the edge of the transition area A12 is D0, 0<D0≤0.5cm.

[0095] In an embodiment of the present invention, the transition area A12 can be considered to extend outward from the first display area A1 to a certain range. The area corresponding to this range can be considered to extend outward from the edge of the first display area A1 to a maximum of 0.5 cm. When extending outward from the edge of the first display area A1, the larger the extension range, the less the impact of thermal radiation from the driver chip is. In an embodiment of the present invention, the width between the edge of the first display area A1 and the edge of the transition area A12 is set to 0<D0≤0.5 cm. Taking into account the area most affected by the thermal radiation from the driver chip, the first signal line L1 is wound in this area to effectively reduce the impact of heat in this area on the light-emitting element 30. If D0>0.5cm, the impact of heat radiation from the driver chip received by this part of the area is very small and can be almost ignored. Therefore, there is no need to perform winding and wiring on the first signal line L1. This is also beneficial for reducing the length of the line segment of the first signal line L1 that uses winding and wiring, and is beneficial for reducing the length difference between the first signal line L1 that passes through the first display area A1 and the transition area A12 and the first signal line L1 that does not pass through the first display area A1 and the transition area A12, thereby improving the signal transmission uniformity of different first signal lines L1.

[0096] Continue to refer Figure 20 and Figure 21 In an optional embodiment of the present invention, the display area 10 further includes a third area A3 located outside the transition area A12. The line widths of the first signal line L1 segments located in the first display area A1 and the transition area A12 are equal and smaller than the line width of the line segment in the third area A3. It should be noted that the line width of the first signal line L1 refers to the width of the line segment in the first signal line L1 in a direction perpendicular to the extension direction of the line segment within the plane of the display panel.

[0097] Specifically, the third area A3 can be considered an area with minimal or even negligible impact from the thermal radiation of the driver chip. The first display area A1 can be considered an area with a greater impact from the thermal radiation of the driver chip. The transition area A12 is affected by the thermal radiation of the driver chip between the first display area A1 and the third area A3. The first signal line L1 in the third area A3 is routed in a straight line, while the first signal line L1 in the first display area A1 and the transition area A12 is routed along the edge of the anode of the light-emitting element. This minimizes the difference in length between the first signal line L1 passing through the first display area A1 and the transition area A12 and the other signal lines L1. If the line width of the first signal line L1 in the three areas is the same, the coupling capacitance between the first signal line L1 in the first display area A1 and the transition area A12 and the other conductive film layer will be greater than the coupling capacitance between the first signal line L1 in the third area A3 and the other conductive film layer. Therefore, in an embodiment of the present invention, when the line widths of the line segments in the first signal line L1 located in the first display area A1 and the transition area A12 are set to be equal and smaller than the line widths of the line segments in the first signal line L1 located in the third area A3, it is beneficial to reduce the coupling capacitance between the first signal line L1 in the first display area A1 and the transition area A12 and other conductive film layers, and is beneficial to balancing the differences in coupling capacitance between the line segments in the first signal line L1 located in different areas and other conductive film layers.

[0098] Figure 22 Shown Figure 1 Another DD-direction cross-section of the display panel. Figure 1 Optionally, a protective film 92 is provided on the non-light-emitting surface of the display panel. When the second area 22 is bent to the non-light-emitting surface of the display panel, the film layer structure corresponding to the second area 22 and the protective film 92 on the non-light-emitting surface can be adhered and fixed by the composite foam 91. In the display panel, it is assumed that the film layer that can be bent is the bendable layer 70. Optionally, the bendable layer 70 does not include the light-emitting layer and the encapsulation layer. Figure 22 The embodiment shown corresponds to Figure 1 and Figure 2 The film structure of the first area A1 in FIG. 1 also shows the bendable layer 70 and the driver chip 90 bent under the protective film 92. It should be noted that Figure 22 The specific structure of the bendable layer 70 below the protective film 92 is not shown. For the specific structure of the bendable layer 70 , reference may be made to the bendable layer 70 above the protective film 92 .

[0099] Please refer to Figure 21 In an optional embodiment of the present invention, at least in the first display area A1, a heat conducting layer 62 is provided between the film layer where the anode 301 is located and the film layer where the first signal line L1 is located along the first direction D1.

[0100] Specifically, please combine Figure 1 and Figure 2 Since the heat of the driver chip 90 and the heat of the first signal line L1 are superimposed in the first display area A1, a heat-conducting layer 62 is provided between the film layer where the anode 301 of the first display area A1 is located and the film layer where the first signal line L1 is located in the embodiment of the present invention. Optionally, the orthographic projection of the heat-conducting layer 62 on the plane where the actual panel is located covers the first display area A1 and extends to other display areas outside the first display area A1. That is, the area of ​​the heat-conducting layer 62 is larger than the area of ​​the first display area A1. When the heat generated by the driver chip 90 and the heat generated by the first signal line L1 is transferred toward the light-emitting element 30 in the first display area A1, it first passes through the heat-conducting layer 62, where the heat diffuses. Because the area of ​​the heat-conducting layer 62 is larger than that of the first display area A1, the heat is dissipated through the heat-conducting layer to an area larger than the first display area A1. When the same amount of heat is transferred to the larger area, the average temperature of different areas of the heat-conducting layer 62 will decrease. Even if some heat continues to transfer toward the light-emitting element 30 through the heat-conducting layer 62, the amount of heat applied to the light-emitting element 30 will be reduced. Therefore, by introducing the heat-conducting layer 62 between the first signal line L1 and the anode 301, the amount of heat applied to the light-emitting element 30 is further reduced, which helps prevent the light-emitting layer 302 of the light-emitting element 30 from decomposing due to high heat.

[0101] Figure 23 Shown Figure 1 Another DD-direction cross-sectional view of the display panel. It should be noted that Figure 23 The specific structure of the bendable layer 70 below the protective film 92 is not shown. For the specific structure of the bendable layer 70 , reference may be made to the bendable layer 70 above the protective film 92 .

[0102] Please refer to Figure 22 and Figure 23 In an optional embodiment of the present invention, along the first direction, a first insulating layer 61 is included between the film layer where the anode 301 is located and the film layer where the first signal line L1 is located, and a thermal conductive layer 62 is located between the first insulating layer 61 and the film layer where the anode 301 is located, and / or the thermal conductive layer 62 is located between the first insulating layer 61 and the film layer where the first signal line L1 is located.

[0103] Specifically, when the first insulating layer 61 is provided between the anode 301 and the first signal line L1, Figure 22 and Figure 23 The embodiments shown respectively show a solution in which the heat-conducting layer 62 is disposed between the first insulating layer 61 and the anode 301 and a solution in which the heat-conducting layer 62 is disposed between the first insulating layer 61 and the first signal line L1. In both solutions, the heat-conducting effect of the heat-conducting layer 62 can be utilized to reduce the amount of heat applied to the light-emitting element 30. Figure 23In the embodiment shown, the heat-conducting layer 62 is arranged closer to the film layer where the first signal line L1 is located. After the heat generated by the driving chip 90 and the heat generated by the first signal line L1 are dissipated through the heat-conducting layer 62, since the first insulating layer 61 is further arranged between the heat-conducting layer 62 and the light-emitting element 30, the first insulating layer 61 can also further dissipate the heat, thereby further reducing the heat acting on the light-emitting element 30, and is more conducive to avoiding the problem of cracking of the light-emitting layer 302 of the light-emitting element 30.

[0104] Please refer to Figure 22 and Figure 23 In the display panel provided by the embodiment of the present invention, when a thermally conductive layer 62 is introduced between the film layer containing the anode 301 and the film layer containing the first signal line L1, the thermally conductive layer 62 can be distributed only in the first display area A1, but the actual size of the thermally conductive layer 62 is not limited. In an optional embodiment of the present invention, the orthographic projection of the display area 10 on the plane of the display panel is located within the orthographic projection range of the thermally conductive layer 62 on the display panel. In other words, the thermally conductive layer 62 is provided in the area corresponding to the entire display area 10, which is equivalent to increasing the coverage area of ​​the thermally conductive layer 62. When the heat generated by the first signal line L1 and the driver chip 90 is conducted to the heat-conducting layer 62, due to the large area of ​​the heat-conducting layer 62, the heat will be able to be dissipated on the larger area of ​​the heat-conducting layer 62, thereby increasing the heat dissipation area, so that more heat can be dissipated from other areas outside the first display area A1, thereby reducing the heat further conducted to the light-emitting element 30 in the first display area A1 through the heat-conducting layer 62, and is more conducive to reducing the heat acting on the light-emitting element 30 in the first display area A1, thereby being more conducive to avoiding display abnormalities caused by the decomposition of the light-emitting layer 302 of the light-emitting element 30 in the first display area A1.

[0105] Optionally, when a separate heat-conducting layer 62 is introduced into the display panel, the heat-conducting layer 62 may include a heat-conducting material such as graphite.

[0106] Figure 24 Shown Figure 1 Another DD-direction cross-sectional view of the display panel. It should be noted that Figure 24 The specific structure of the bendable layer 70 below the protective film 92 is not shown. For the specific structure of the bendable layer 70 , reference may be made to the bendable layer 70 above the protective film 92 .

[0107] Please refer to Figure 24 In an optional embodiment of the present invention, along the first direction, a first insulating layer 61 is included between the film layer where the anode 301 is located and the film layer where the first signal line L1 is located. The first insulating layer 61 is filled with a thermal conductive material, and the first insulating layer 61 is reused as a thermal conductive layer 62.

[0108] Specifically, Figure 23The illustrated embodiment shows a solution in which the first insulating layer 61 is used as the thermal conductive layer 62. In this case, the first insulating layer 61 can be filled with a thermally conductive material to provide the first insulating layer 61 with better thermal conductivity. When the first insulating layer 61 is reused as the thermal conductive layer 62, the first insulating layer 61 is provided in the entire area corresponding to the display area 10. In this way, there is no need to add a new film layer structure to the display panel to serve as the thermal conductive layer 62, which helps to simplify the film layer structure of the display panel. At the same time, the larger area of ​​the first insulating layer 61 can also increase the heat dissipation area, reducing the heat transferred from the first insulating layer 61 to the light-emitting element 30 in the first display area A1, thereby also helping to avoid display anomalies caused by the decomposition of the light-emitting layer 302 of the light-emitting element 30 in the first display area A1.

[0109] Optionally, the thermally conductive material added to the first insulating layer 61 includes graphite or the like.

[0110] Figure 25 Shown Figure 1 An EE-direction cross-sectional view of the display panel. It should be noted that Figure 25 The specific structure of the bendable layer 70 below the protective film 92 is not shown. For the specific structure of the bendable layer 70 , reference may be made to the bendable layer 70 above the protective film 92 .

[0111] Please combine Figure 1 、 Figure 2 and Figure 25 In an optional embodiment of the present invention, the display panel further includes a second display area A2 arranged outside the first display area A1, the thickness of the first insulating layer 61 in the first display area A1 is D01, and the thickness of the first insulating layer 61 in the second display area A2 is D02, wherein D01≥D02.

[0112] In the display panel provided by the embodiment of the present invention, when a thermally conductive material is filled in the first insulating layer 61 so that the first insulating layer 61 has better thermal conductivity, the thickness of the first insulating layer 61 in the first display area A1 and the second display area A2 can be designed differently. Specifically, since the heat emitted by the driving chip 90 will act on the first display area A1, but has less impact on the second display area A2, when the thickness D01 of the first insulating layer 61 in the first display area A1 is set to be greater than the thickness D02 of the first insulating layer 61 in the second display area A2, it is beneficial to increase the heat conduction path of the first insulating layer 61 in the first display area A1. As the heat conduction path increases, the heat will gradually decrease, which is beneficial to reducing the heat conducted from the first insulating layer 61 in the first display area A1 to the light-emitting element 30, and thus is beneficial to avoiding the display abnormality problem caused by the decomposition of the light-emitting layer 302 of the light-emitting element 30 in the first display area A1.

[0113] It should be noted that, in an actual manufacturing process, a half-tone mask process may be used to form the first insulating layer 61 with different thicknesses.

[0114] Figure 26 Shown Figure 1 Another EE-direction cross-sectional view of the display panel. It should be noted that Figure 26 The specific structure of the bendable layer 70 below the protective film 92 is not shown. For the specific structure of the bendable layer 70 , reference may be made to the bendable layer 70 above the protective film 92 .

[0115] Please refer to Figure 26 In an optional embodiment of the present invention, along the first direction, a first insulating layer 61 is included between the film layer where the anode 301 is located and the film layer where the first signal line L1 is located; the display panel also includes a second display area A2 arranged outside the first display area A1; the first insulating layer 61 includes a first sub-insulating layer 611 located in the first display area A1 and a second sub-insulating layer 612 located in the second display area A2, the thickness of the first sub-insulating layer 611 is D11, and the thickness of the second sub-insulating layer 612 is D12, wherein D11>D12.

[0116] Figure 26 The embodiment shown shows a solution in which a special heat-conducting layer 62 is not introduced between the film layer where the anode 301 is located and the first signal line L1, but heat is conducted through the first insulating layer 61. Figure 1 、 Figure 2 and Figure 26 Specifically, in the embodiment of the present invention, the thickness D11 of the first sub-insulating layer 611 located in the first display area A1 in the first insulating layer 61 is set to be greater than the thickness D12 of the second sub-insulating layer 612 located in the second display area A2, which is equivalent to increasing the heat conduction path in the first sub-insulating layer 611 in the first display area A1. As the heat conduction path increases, the heat will gradually decrease, which is beneficial to reducing the heat conducted from the first sub-insulating layer 611 in the first display area A1 to the light-emitting element 30, and thus helps to avoid the display abnormality problem caused by the decomposition of the light-emitting layer 302 of the light-emitting element 30 in the first display area A1.

[0117] It should be noted that, in an actual manufacturing process, a half-tone mask process may be used to form the first insulating layer 61 with different thicknesses.

[0118] Based on the same inventive concept, the present invention further provides a display device 200, Figure 27 FIG2 is a schematic diagram of a structure of a display device provided by an embodiment of the present invention, please refer to FIG2 Figure 27 The display device 200 includes the display panel 100 provided by the above embodiment of the present invention.

[0119] It is understood that the display device provided in the embodiments of the present invention can be a computer, mobile phone, tablet, or other display device with a display function, and is particularly suitable for display devices with a wide-screen structure, such as an in-vehicle display device, and the present invention does not impose specific limitations on this. The display device provided in the embodiments of the present invention has the beneficial effects of the display panel provided in the embodiments of the present invention. For details, please refer to the detailed description of the display panel in the above embodiments, and this embodiment will not be repeated here.

[0120] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a non-display area; the non-display area comprises a first area, a bending area, and a second area located on the same side of the display area, the bending area being located between the first area and the second area, and the second area comprising a binding area; the display area comprises a first display area, and the binding area at least partially overlaps with the first display area along a first direction, wherein the first direction is the thickness direction of the display panel; The display panel further includes a plurality of sub-pixels, each of which includes a pixel circuit and a light-emitting element electrically connected to each other. The display panel further includes a first signal line electrically connected to the pixel circuit, and the light-emitting element includes an anode, a light-emitting layer, and a cathode arranged along the first direction. The light-emitting element includes a first-color light-emitting element, and at least in the first display area, an orthographic projection of the first signal line on the plane where the display panel is located is located outside the orthographic projection of the anode of the first-color light-emitting element on the plane where the display panel is located. The display panel also includes a second display area arranged outside the first display area. The first signal line includes a first line segment located in the first display area and a second line segment located in the second display area. The line width of the first line segment is smaller than the line width of the second line segment.

2. The display panel according to claim 1, wherein: The display panel includes a data line and a first power signal line, and the first signal line includes at least one of the data line and the first power signal line.

3. The display panel according to claim 2, wherein: In the first display area, the data line and the first power signal line are arranged in different layers.

4. The display panel according to claim 3, wherein: The display panel includes a substrate and a first metal layer, a capacitor metal layer, a second metal layer, and a third metal layer arranged on one side of the substrate, wherein along the first direction, the capacitor metal layer is located on a side of the first metal layer facing away from the substrate, and the second metal layer is located on a side of the capacitor metal layer facing away from the substrate; The third metal layer is located between the second metal layer and the light emitting element; The data line is located in one of the second metal layer, the capacitor metal layer and the third metal layer, and the first power signal line is located in another one of the second metal layer, the capacitor metal layer and the third metal layer.

5. The display panel according to claim 1, wherein: In the first display area, the first signal line includes a plurality of end-to-end connected sub-line segments, and at least part of the sub-line segments are routed along the outline of the anode of the first color light emitting element.

6. The display panel according to claim 1, wherein: The display panel includes a substrate and a first metal layer, a capacitor metal layer, a second metal layer, a third metal layer, and a fourth metal layer arranged on one side of the substrate. Along the first direction, the capacitor metal layer is located on a side of the first metal layer facing away from the substrate, and the second metal layer is located on a side of the capacitor metal layer facing away from the substrate; the third metal layer is located between the second metal layer and the fourth metal layer, and the fourth metal layer is located on a side of the light-emitting element facing the substrate; The display panel also includes a plurality of second signal lines, which are located in the fourth metal layer, and at least part of the second signal lines are located in the first display area; in the first display area, the orthographic projection of the second signal lines on the plane where the display panel is located is located outside the orthographic projection of the anode of the first color light-emitting element on the plane where the display panel is located.

7. The display panel according to claim 6, wherein: The display area includes a first display area and a second display area, the second display area is located on at least one side of the first display area along a second direction; the first display area and the second display area each include a plurality of data lines extending along a third direction and arranged along the second direction, the second direction intersecting the third direction; The non-display area includes a fan-out line, and the data line is electrically connected to the fan-out line; wherein the data line in the second display area is electrically connected to the fan-out line through a connecting line; The second signal line includes the connecting line.

8. The display panel according to claim 1, wherein: It also includes a second color light-emitting element and a third color light-emitting element, wherein the decomposition temperature of the material of the light-emitting layer in the first color light-emitting element is T1, the decomposition temperature of the material of the light-emitting layer in the second color light-emitting element is T2, and the decomposition temperature of the material of the light-emitting layer in the third color light-emitting element is T3, wherein T1<T2, and T1<T3.

9. The display panel according to claim 8, wherein: T2<T3, in the first display area, the orthographic projection of the first signal line on the plane where the display panel is located is located outside the orthographic projection of the anode of the second color light emitting element on the plane where the display panel is located.

10. The display panel according to claim 8, wherein In the first display area, along the first direction, the first signal line does not overlap with the first color light emitting element, the second color light emitting element, and the third color light emitting element.

11. The display panel according to claim 1, wherein The display area also includes a transition area arranged around the first display area, in which the orthographic projection of the first signal line on the plane where the display panel is located is located outside the orthographic projection of the anode of the first color light-emitting element on the plane where the display panel is located.

12. The display panel according to claim 11, wherein: The width between the edge of the first display area and the edge of the transition area is D0, 0<D0≤0.5cm.

13. The display panel according to claim 11, wherein: The display area further includes a third area located outside the transition area; in the first signal line, line segments located in the first display area and the transition area have the same line width and are both smaller than the line width of the line segments in the third area.

14. The display panel according to claim 1, wherein At least in the first display area, along the first direction, a heat conducting layer is provided between the film layer where the anode is located and the film layer where the first signal line is located.

15. The display panel according to claim 14, wherein: Along the first direction, a first insulating layer is included between the film layer where the anode is located and the film layer where the first signal line is located, the thermal conductive layer is located between the first insulating layer and the film layer where the anode is located, and / or the thermal conductive layer is located between the first insulating layer and the film layer where the first signal line is located.

16. The display panel according to claim 15, wherein: The orthographic projection of the display area on the plane where the display panel is located is located within the orthographic projection range of the heat-conducting layer on the display panel.

17. The display panel according to claim 14, wherein: Along the first direction, a first insulating layer is included between the film layer where the anode is located and the film layer where the first signal line is located. The first insulating layer is filled with a heat-conducting material and is reused as the heat-conducting layer.

18. The display panel according to claim 17, wherein: The display panel further includes a second display area disposed outside the first display area. The thickness of the first insulating layer in the first display area is D01, and the thickness of the first insulating layer in the second display area is D02, where D01≥D02.

19. The display panel according to claim 1, wherein Along the first direction, a first insulating layer is provided between the film layer where the anode is located and the film layer where the first signal line is located; the display panel further includes a second display area disposed outside the first display area; The first insulating layer includes a first sub-insulating layer located in the first display area and a second sub-insulating layer located in the second display area. The first sub-insulating layer has a thickness of D11 and a thickness of D12, wherein D11>D12.

20. A display device, characterized in that: The display panel comprises any one of claims 1 to 19.

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