Display panel and display device

Abstract

The present disclosure provides a display panel and a display device, belonging to the field of display technology, which can solve the problem of large energy consumption of the existing display panel. The display panel of the present disclosure has a display area and a non-display area surrounding the display area. The display area includes an under-screen camera area and a non-under-screen camera area. The display panel includes: a substrate, a first light-emitting device disposed on the substrate in the under-screen camera area, a second light-emitting device disposed on the substrate and in the non-under-screen camera area, a first voltage signal line and a second voltage signal line located on the substrate; the cathode of the first light-emitting device is electrically connected to the first voltage signal line; the cathode of the second light-emitting device is electrically connected to the second voltage signal line; the voltage signals of the first voltage signal line and the second voltage signal line are different.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of display, and particularly relates to a display panel and a display device. Background Art

[0002] An organic light-emitting diode (OLED) is a light-emitting device that uses an organic solid semiconductor as a light-emitting material. Due to its advantages such as simple manufacturing process, low cost, low power consumption, high luminous brightness, and wide operating temperature range, it has broad application prospects. In order to meet the user's demand for a larger screen-to-body ratio, the display panel is developing towards a full-screen direction.

[0003] The current full-screen design places devices such as cameras under the display panel, that is, the camera area. In order to ensure the brightness uniformity of the entire display area, a relatively high-voltage power supply voltage signal often needs to be input to the pixel units in the entire display area, which increases the power consumption of the display panel. And the entire display panel operates at a relatively high voltage, affecting the lifespan of the display panel. Summary of the Invention

[0004] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and provides a display panel and a display device.

[0005] In a first aspect, an embodiment of the present disclosure provides a display panel, which has a display area and a non-display area surrounding the display area. The display area includes an under-screen camera area and a non-under-screen camera area. The display panel includes: a substrate, a first light-emitting device disposed on the substrate in the under-screen camera area, a second light-emitting device disposed on the substrate in the non-under-screen camera area, a first voltage signal line disposed on the substrate, and a second voltage signal line disposed on the substrate;

[0006] The cathode of the first light-emitting device is electrically connected to the first voltage signal line;

[0007] The cathode of the second light-emitting device is electrically connected to the second voltage signal line;

[0008] The voltage signals of the first voltage signal line and the second voltage signal line are different.

[0009] Optionally, the absolute value of the voltage of the voltage signal of the first voltage signal line is greater than the absolute value of the voltage of the voltage signal of the second voltage signal line.

[0010] Optionally, the display panel further includes: a first common cathode and a second common cathode;

[0011] The cathode of the first light-emitting device is electrically connected to the first common cathode, and the first common cathode is overlapped with the first voltage signal line;

[0012] The cathode of the second light-emitting device is electrically connected to the second common cathode, and the second common cathode is overlapped with the second voltage signal line.

[0013] Optionally, the cathode of the first light-emitting device and the first common cathode are of an integrally formed structure;

[0014] The cathode of the second light-emitting device and the second common cathode are of an integrally formed structure.

[0015] Optionally, the display panel further includes: a first pixel circuit located on the substrate and disposed in the under-screen camera area, and a second pixel circuit located on the substrate and disposed in the non-under-screen camera area; the first pixel circuit includes: a first thin-film transistor; the second pixel circuit includes: a second thin-film transistor;

[0016] The anode of the first light-emitting device is electrically connected to the drain of the first thin-film transistor;

[0017] The anode of the second light-emitting device is electrically connected to the drain of the second thin-film transistor.

[0018] Optionally, the display panel further includes: a first conductive layer located on the substrate;

[0019] The first conductive layer includes: the gate of the first thin-film transistor, the gate of the second thin-film transistor, the first voltage signal line, and the second voltage signal line.

[0020] Optionally, the display panel further includes: a second conductive layer located on the substrate;

[0021] The second conductive layer includes: the source and drain of the first thin-film transistor, the source and drain of the second thin-film transistor, the first voltage signal line, and the second voltage signal line.

[0022] Optionally, the display panel further includes: a third conductive layer and a fourth conductive layer that are sequentially and insulatingly disposed on the substrate along the direction away from the substrate;

[0023] The first voltage signal line includes: a first sub-voltage signal line and a second sub-voltage signal line;

[0024] The second voltage signal line includes: a third sub-voltage signal line and a fourth sub-voltage signal line;

[0025] The third conductive layer includes: the gate of the first thin-film transistor, the gate of the first thin-film transistor, the first sub-voltage signal line, and the third sub-voltage signal line;

[0026] The fourth conductive layer includes: the source and drain of the first thin-film transistor, the source and drain of the second thin-film transistor, the second sub-voltage signal line, and the fourth sub-voltage signal line.

[0027] Optionally, the display panel further includes: a plurality of gate lines and a plurality of data lines located on the substrate and extending from the under-screen camera area to the non-under-screen camera area;

[0028] The third conductive layer further includes: the gate line;

[0029] The fourth conductive layer further includes: the data line.

[0030] Optionally, both the first voltage signal line and the second voltage signal line include a VSS signal line.

[0031] In a second aspect, an embodiment of the present disclosure provides a display device, which includes the display panel provided as above.

[0032] Optionally, the display device further includes a camera;

[0033] The camera is located on a side of the first light-emitting device close to the substrate. Description of the Drawings

[0034] Figure 1 It is a schematic structural diagram of an exemplary display panel;

[0035] Figure 2 It is an IDVD characteristic curve diagram of a driving transistor in a pixel circuit;

[0036] Figure 3 It is an IV characteristic curve diagram of an OLED device;

[0037] Figure 4 For Figure 2 The IDVD characteristic curve of the driving transistor in the pixel circuit shown and Figure 3 A schematic diagram combining the IV characteristic curve of the OLED device shown;

[0038] Figure 5 It is a schematic structural diagram of a display panel provided by an embodiment of the present disclosure. Detailed Embodiments

[0039] To enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be further described in detail below with reference to the drawings and specific embodiments.

[0040] Unless otherwise defined, the technical terms or scientific terms used in this disclosure shall have the ordinary meanings understood by those of ordinary skill in the field to which this disclosure pertains. The terms "first", "second" and similar words used in this disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms "connected" or "coupled" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0041] Figure 1 is a schematic structural diagram of an exemplary display panel, as Figure 1 shown, the display panel has a display area and a non-display area surrounding the display area. The display area includes: an under-screen camera area and a non-under-screen camera area. The display panel includes: a substrate (not shown in the figure), light-emitting devices 10 located on the substrate and disposed in the under-screen camera area and the non-under-screen camera area, and voltage signal lines 20 located on the substrate; the cathodes of the respective light-emitting devices 10 are all connected to the voltage signal lines 20. It should be noted here that the voltage signal lines 20 can be specifically disposed in the non-display area to reduce the occlusion of light in the display area. It can be understood that in actual applications, for the convenience of routing the voltage signal lines 20, the voltage signal lines 20 can also be disposed in the display area, such as the non-under-screen camera area, which is not limited herein.

[0042] Taking the light-emitting device 10 as an OLED device as an example, the OLED device may include an anode and a cathode disposed opposite to each other, and a light-emitting layer between the anode and the cathode. The anode of the OLED device can be electrically connected to the drain of the driving transistor in the pixel circuit through a via hole penetrating the planarization layer, and the anode can be made of materials such as ITO (indium tin oxide), indium zinc oxide (IZO), zinc oxide (ZnO), etc. The light-emitting layer may include small molecule organic materials or polymer molecule organic materials, and can be fluorescent light-emitting materials or phosphorescent light-emitting materials, and can emit red light, green light, blue light, or white light, etc. under the electric field drive of the anode and the cathode; and, according to actual different needs, in different examples, the light-emitting layer may further include functional layers such as an electron injection layer, an electron transport layer, a hole injection layer, a hole transport layer, etc. The cathode covers the light-emitting layer, and the cathode can be made of metal materials such as lithium (Li), aluminum (Al), magnesium (Mg), silver (Ag), etc.

[0043] The voltage signal line 20 can specifically be a VSS signal line, that is, a DC low-voltage signal line. In the display panel, a VDD signal line corresponding to the VSS signal line is also provided, that is, a DC high-voltage signal line. A current can be formed between the DC high-voltage signal line and the DC low-voltage signal line. The driving transistor in the pixel circuit can change its opening degree under the control of the data signal, control the cross-voltage between the anode and the cathode of the OLED device, so as to control the magnitude of the current flowing through the OLED device and realize displays of different brightnesses.

[0044] Figure 2 It is the IDVD characteristic curve graph of the driving transistor in the pixel circuit. Figure 3 It is the IV characteristic curve graph of the OLED device. Figure 4 For Figure 2 The IDVD characteristic curve of the driving transistor in the pixel circuit shown in Figure 3 is combined with the IV characteristic curve of the OLED device shown in Figure 2 , Figure 3 and Figure 4As shown, when the entire display panel needs to reach a brightness of 400 nits (nit), the current of the driving transistor in the non-under-screen camera area is 2.2E-8 amperes (A), and the current of the driving transistor in the under-screen camera area is 4.0E-8 A. At this time, the cross-voltage of the OLED device in the non-under-screen camera area is 3.6 volts (V), and the cross-voltage of the OLED device in the under-screen camera area is 3.9 V. The cross-voltage of the OLED device in the under-screen camera area is greater than that of the OLED device in the non-under-screen camera area. In this way, it is necessary to increase the voltage (absolute value) of the VSS signal line. Since both are connected to the same voltage signal line, it is often necessary to set a relatively high voltage (absolute value) on the VSS signal line to meet the normal operation of the OLED, which increases the power consumption of the display panel. And the entire display panel operates at a relatively high voltage, affecting the service life of the display panel.

[0045] In order to solve at least one of the above technical problems, the embodiments of the present disclosure provide a display panel and a display device. The display panel and the display device provided by the embodiments of the present disclosure will be further described in detail below with reference to the drawings and specific embodiments.

[0046] Figure 5 The following is a schematic structural diagram of a display panel provided by an embodiment of the present disclosure. As Figure 5 shown, the display panel has a display area and a non-display area surrounding the display area. The display area includes an under-screen camera area and a non-under-screen camera area. The display panel includes: a substrate (not shown in the figure), a first light-emitting device 101 disposed on the substrate in the under-screen camera area, a second light-emitting device 102 disposed on the substrate in the non-under-screen camera area, a first voltage signal line 201 and a second voltage signal line 202 disposed on the substrate; the cathode of the first light-emitting device 101 is electrically connected to the first voltage signal line 201; the cathode of the second light-emitting device 102 is electrically connected to the second voltage signal line 202; the voltage signals of the first voltage signal line 201 and the second voltage signal line 202 are different.

[0047] It should be noted here that the first voltage signal line 201 and the second voltage signal line 202 in the embodiments of the present disclosure are both signal lines of the same type, specifically, they can be VSS signal lines, that is, DC low-voltage signal lines. Correspondingly, in the display panel, there is also a VDD signal line corresponding to the VSS signal line, that is, a DC high-voltage signal line. The structures of the first light-emitting device 101 and the second light-emitting device 102 are the same, and both include an anode and a cathode arranged opposite to each other, and a light-emitting layer between the anode and the cathode. Moreover, the pixel circuits connected to the first light-emitting device 101 and the second light-emitting device 102 are the same, and the VDD signal line can provide a DC high-voltage signal for the first light-emitting device 101 and the second light-emitting device 102. The first voltage signal line 201 and the second voltage signal line 202 can be specifically arranged in the non-display area to reduce the occlusion of light in the display area. It can be understood that in practical applications, for the convenience of routing the first voltage signal line 201 and the second voltage signal line 202, the first voltage signal line 201 and the second voltage signal line 202 can also be arranged in the display area, such as the non-under-screen camera area, which is not limited here.

[0048] In the display panel provided by the embodiments of the present disclosure, the cathode of the first light-emitting device 101 in the under-screen camera area is connected to the first voltage signal line 201, and the cathode of the second light-emitting device 102 in the non-under-screen camera area is connected to the second voltage signal line 202. In this way, the first light-emitting device 101 and the second light-emitting device 102 can respectively obtain the VSS signal from the first voltage signal line 201 and the second voltage signal line 202. Therefore, the VSS signals input to the first light-emitting device 101 and the second light-emitting device 102 can be independently controlled respectively. Specifically, the absolute value of the voltage of the voltage signal of the first voltage signal line 201 can be set to be greater than the absolute value of the voltage of the voltage signal of the second voltage signal line, that is, a relatively high voltage is set on the first voltage signal line 201, and a relatively low voltage is set on the second voltage signal line 202. It is not necessary to set both of them to a relatively high voltage to meet the normal operation of the first light-emitting device 101 and the second light-emitting device 102. Therefore, the power consumption of the display panel can be saved. And it can be avoided that the entire display panel operates at a relatively high voltage, thereby improving the service life of the display panel.

[0049] In some embodiments, the display panel further includes: a first common cathode (not shown in the figure) and a second common cathode (not shown in the figure); the cathode of the first light-emitting device 101 is electrically connected to the first common cathode, and the first common cathode is overlapped with the first voltage signal line 201; the cathode of the second light-emitting device 102 is electrically connected to the second common cathode, and the second common cathode is overlapped with the second voltage signal line 202.

[0050] The cathodes of the respective first light-emitting devices 101 can all be connected to a first common cathode, and then connected to a first voltage signal line 201 through the first common cathode. First of all, the first common cathode is a planar electrode with a small resistance, which can effectively reduce the connection resistance between the cathode of the first light-emitting device 101 and the first voltage signal line 201. Secondly, a large number of signal connection lines for connecting the cathode of the first light-emitting device 101 and the first voltage signal line 201 can be avoided, which can reduce the wiring difficulty and save the manufacturing cost. Moreover, the first common cathode can overlap with the first voltage signal line 201, and the first common cathode can provide a large overlapping plane for the first voltage signal line 201, making the connection between the two more firm and avoiding the problem of poor connection stability caused by directly connecting the cathodes of the respective first light-emitting devices 101 to the first voltage signal line 201. The cathodes of the respective second light-emitting devices 102 can all be connected to a second common cathode, and then connected to a second voltage signal line 202 through the second common cathode. The implementation principle and beneficial effects are the same as those described above and will not be elaborated here.

[0051] In some embodiments, the cathode of the first light-emitting device 101 and the first common cathode are of an integrally formed structure; the cathode of the second light-emitting device 102 and the second common cathode are of an integrally formed structure.

[0052] The cathode of the first light-emitting device 101 and the first common cathode are of an integrally formed structure. During the manufacturing process, metal materials such as Al can be deposited to form the cathode of the first light-emitting device 101 and the first common cathode, and the two can form an integrally formed structure. On the one hand, the two can be formed in the same step, thus reducing the manufacturing steps and saving the manufacturing cost. On the other hand, since the two are of an integrally formed structure, the connection resistance caused by the connection between the two can be avoided, which is beneficial to signal transmission and saves energy consumption. The cathode of the second light-emitting device 102 and the second common cathode are of an integrally formed structure. The implementation principle and beneficial effects are the same as those described above and will not be elaborated here.

[0053] In some embodiments, the display panel further includes: a first pixel circuit (not shown in the figure) located on the substrate and disposed in the under-screen camera area, and a second pixel circuit (not shown in the figure) located on the substrate and disposed in the non-under-screen camera area; the first pixel circuit includes: a first thin-film transistor; the second pixel circuit includes: a second thin-film transistor; the anode of the first light-emitting device 101 is electrically connected to the drain of the first thin-film transistor; the anode of the second light-emitting device 102 is electrically connected to the drain of the second thin-film transistor.

[0054] It should be noted here that the first pixel circuit generally includes at least devices such as switching transistors, driving transistors, and storage capacitors (i.e., the existing 2T1C, 6T1C, or 7T1C pixel driving circuits). To facilitate the distinction from the driving transistors in the second pixel circuit, the driving circuit in the first pixel circuit is defined as the first thin-film transistor, and the driving transistor in the second pixel circuit is defined as the second thin-film transistor. In the embodiments of the present disclosure, only the driving transistor is taken as an example for illustration, and the structures of other transistors are similar to it, which will not be elaborated here. Taking the bottom-gate thin-film transistor as the driving transistor as an example, the driving transistor includes a gate, a gate insulating layer, an active layer, an interlayer insulating layer, a source electrode, and a drain electrode successively arranged along the direction away from the substrate. The source electrode and the drain electrode are arranged in the same layer and are respectively connected to the active layer through vias penetrating the interlayer insulating layer. The anode of the first light-emitting device 101 can be electrically connected to the drain electrode of the first thin-film transistor so that the driving transistor drives the first light-emitting device 101 to emit light. Similarly, the anode of the second light-emitting device 102 can be electrically connected to the drain electrode of the second thin-film transistor so that the driving transistor drives the second light-emitting device 102 to emit light.

[0055] In some embodiments, the display panel further includes: a first conductive layer (not shown in the figure) located on the substrate; the first conductive layer includes: the gate of the first thin-film transistor, the gate of the second thin-film transistor, a first voltage signal line, and a second voltage signal line.

[0056] The first conductive layer may include the gate of the first thin-film transistor, the gate of the second thin-film transistor, a first voltage signal line, and a second voltage signal line. In this way, the gate of the first thin-film transistor, the gate of the second thin-film transistor, the first voltage signal line, and the second voltage signal line are arranged in the same layer, and the same material can be used and prepared by one process, which can reduce the preparation steps and save the preparation cost. The material may specifically include a metal material or an alloy material, for example, a metal single layer or a multi-layer structure formed by a metal material including molybdenum (Mo), aluminum (Al), or titanium (Ti) or an alloy including one or several of molybdenum (Mo), aluminum (Al), and titanium (Ti). For example, the multi-layer structure is a multi-metal layer stack, such as a three-layer metal stack of titanium (Ti), aluminum (Al), and titanium (Ti).

[0057] In some embodiments, the display panel further includes: a second conductive layer (not shown in the figure) located on the substrate; the second conductive layer includes: the source electrode and the drain electrode of the first thin-film transistor, the source electrode and the drain electrode of the second thin-film transistor, a first voltage signal line, and a second voltage signal line.

[0058] The second conductive layer may include: the source and drain electrodes of the first thin film transistor, the source and drain electrodes of the second thin film transistor, the first voltage signal line, and the second voltage signal line. In this way, the source and drain electrodes of the first thin film transistor, the source and drain electrodes of the second thin film transistor, the first voltage signal line, and the second voltage signal line are arranged in the same layer, and the same material can be used and they can be prepared by one process. This can reduce the preparation steps and save the preparation cost. The material may specifically include a metal material or an alloy material, such as a single-layer or multi-layer metal structure formed by a metal material including molybdenum (Mo), aluminum (Al), or titanium (Ti), or an alloy including one or several of molybdenum (Mo), aluminum (Al), and titanium (Ti). For example, the multi-layer structure is a multi-metal layer stack, such as a three-layer metal stack of titanium (Ti), aluminum (Al), and titanium (Ti), etc.

[0059] In some embodiments, the display panel further includes: a third conductive layer (not shown in the figure) and a fourth conductive layer (not shown in the figure) that are sequentially and insulatingly arranged on the substrate along a direction away from the substrate; the first voltage signal line 201 includes: a first sub-voltage signal line and a second sub-voltage signal line that are electrically connected; the second voltage signal line 202 includes: a third sub-voltage signal line and a fourth sub-voltage signal line that are electrically connected; the third conductive layer includes: the gate electrode of the first thin film transistor, the gate electrode of the first thin film transistor, the first sub-voltage signal line, and the third sub-voltage signal line; the fourth conductive layer includes: the source and drain electrodes of the first thin film transistor, the source and drain electrodes of the second thin film transistor, the second sub-voltage signal line, and the fourth sub-voltage signal line.

[0060] The first voltage signal line 201 may be a two-layer structure, specifically, a first sub-voltage signal line and a second sub-voltage signal line arranged in a stacked manner, with an insulating layer disposed therebetween and electrically connected to each other through a via hole penetrating the insulating layer. The two-layer structure can reduce the resistance of the first voltage signal line 201, thereby facilitating signal transmission and saving energy consumption. Similarly, the second voltage signal line 202 may also be a two-layer structure, and its principle is similar to that of the above-mentioned first voltage signal line 201 and will not be elaborated here.

[0061] The third conductive layer may include the gate of the first thin-film transistor, the gate of the first thin-film transistor, the first sub-voltage signal line, and the third sub-voltage signal line. In this way, the gate of the first thin-film transistor, the gate of the first thin-film transistor, the first sub-voltage signal line, and the third sub-voltage signal line are arranged in the same layer, can use the same material, and are fabricated by one process. This can reduce the fabrication steps and save the fabrication cost. The material may specifically include a metal material or an alloy material, such as a metal single-layer or multi-layer structure formed by a metal material including molybdenum (Mo), aluminum (Al), or titanium (Ti), or an alloy including one or several of molybdenum (Mo), aluminum (Al), and titanium (Ti). For example, the multi-layer structure is a multi-metal layer stack, such as a three-layer metal stack of titanium (Ti), aluminum (Al), and titanium (Ti), etc.

[0062] The fourth conductive layer may include the source and drain of the first thin-film transistor, the source and drain of the second thin-film transistor, the second sub-voltage signal line, and the fourth sub-voltage signal line. In this way, the source and drain of the first thin-film transistor, the source and drain of the second thin-film transistor, the second sub-voltage signal line, and the fourth sub-voltage signal line are arranged in the same layer, can use the same material, and are fabricated by one process. This can reduce the fabrication steps and save the fabrication cost. The material may specifically include a metal material or an alloy material, such as a metal single-layer or multi-layer structure formed by a metal material including molybdenum (Mo), aluminum (Al), or titanium (Ti), or an alloy including one or several of molybdenum (Mo), aluminum (Al), and titanium (Ti). For example, the multi-layer structure is a multi-metal layer stack, such as a three-layer metal stack of titanium (Ti), aluminum (Al), and titanium (Ti), etc.

[0063] In some embodiments, the display panel further includes: a plurality of gate lines (not shown in the figure) and a plurality of data lines (not shown in the figure) located on the substrate and extending from the under-screen camera area to the non-under-screen camera area; the first electrode layer further includes: gate lines; the second electrode layer further includes: data lines.

[0064] The gate of the first thin-film transistor, the gate of the first thin-film transistor, the first sub-voltage signal line, and the third sub-voltage signal line can be arranged in the same layer as the gate lines, can use the same material, and are fabricated by one process. This can reduce the fabrication steps and save the fabrication cost. The source and drain of the first thin-film transistor, the source and drain of the second thin-film transistor, the second sub-voltage signal line, and the fourth sub-voltage signal line can be arranged in the same layer as the data lines, can use the same material, and are fabricated by one process. This can reduce the fabrication steps and save the fabrication cost.

[0065] An embodiment of the present disclosure further provides a display device, which includes a display panel provided in any of the above embodiments. The display device further includes: a camera; the camera is located on a side of the first light-emitting device close to the substrate, and the camera can be integrated at the bottom of the display panel to achieve a full-screen design.

[0066] The display device can be an electronic device with a display panel, such as a mobile phone, a tablet computer, an electronic watch, a sports bracelet, a laptop computer, etc. The implementation principle and the technical effects thereof of the display device can refer to the discussion on the implementation principle and technical effects of the display mother board above, and will not be elaborated here.

[0067] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the present disclosure.

Claims

1. A display panel having a display area and a non-display area surrounding the display area, the display area including an under-screen camera area and a non-under-screen camera area, characterized in that, The display panel includes: a substrate, a first light-emitting device disposed on the substrate in the under-screen camera area, a second light-emitting device disposed on the substrate in the non-under-screen camera area, a first voltage signal line and a second voltage signal line disposed on the substrate; both the first voltage signal line and the second voltage signal line include a VSS signal line; The cathode of the first light-emitting device is electrically connected to the first voltage signal line; The cathode of the second light-emitting device is electrically connected to the second voltage signal line, The voltage signals of the first voltage signal line and the second voltage signal line are different; the absolute value of the voltage of the voltage signal of the first voltage signal line is greater than the absolute value of the voltage of the voltage signal of the second voltage signal line; The display panel further includes: a first common cathode and a second common cathode; The cathode of the first light-emitting device is electrically connected to the first common cathode, and the first common cathode is overlapped with the first voltage signal line; The cathode of the second light-emitting device is electrically connected to the second common cathode, and the second common cathode is overlapped with the second voltage signal line; The cathode of the first light-emitting device and the first common cathode are of an integrally formed structure; The cathode of the second light-emitting device and the second common cathode are of an integrally formed structure; Both the first common cathode and the second common cathode are planar electrodes.

2. The display panel according to claim 1, wherein The display panel further includes: a first pixel circuit disposed on the substrate in the under-screen camera area, and a second pixel circuit disposed on the substrate in the non-under-screen camera area; the first pixel circuit includes: a first thin-film transistor; the second pixel circuit includes: a second thin-film transistor; The anode of the first light-emitting device is electrically connected to the drain of the first thin-film transistor; The anode of the second light-emitting device is electrically connected to the drain of the second thin-film transistor.

3. The display panel according to claim 2, characterized in that, The display panel further includes: a first conductive layer disposed on the substrate; The first conductive layer includes: the gate of the first thin-film transistor, the gate of the second thin-film transistor, the first voltage signal line and the second voltage signal line.

4. The display panel according to claim 2, wherein The display panel further includes: a second conductive layer disposed on the substrate; The second conductive layer includes: the source and drain of the first thin-film transistor, the source and drain of the second thin-film transistor, the first voltage signal line and the second voltage signal line.

5. The display panel according to claim 2, wherein, The display panel further includes: a third conductive layer and a fourth conductive layer that are sequentially insulated along the direction away from the substrate and disposed on the substrate; The first voltage signal line includes: a first sub-voltage signal line and a second sub-voltage signal line; The second voltage signal line includes: a third sub-voltage signal line and a fourth sub-voltage signal line; The third conductive layer includes: the gate of the first thin-film transistor, the gate of the first thin-film transistor, the first sub-voltage signal line and the third sub-voltage signal line; The fourth conductive layer includes: the source and drain of the first thin-film transistor, the source and drain of the second thin-film transistor, the second sub-voltage signal line, the fourth sub-voltage signal line.

6. The display panel according to claim 5, wherein The display panel further includes: a plurality of gate lines and a plurality of data lines located on the substrate and extending from the under-screen camera area to the non-under-screen camera area; The third conductive layer further includes: the gate lines; The fourth conductive layer further includes: the data lines.

7. A display device, characterized in that, The display device includes the display panel according to any one of claims 1-6.

8. The display device according to claim 7, wherein The display device further includes a camera; The camera is located on a side of the first light-emitting device close to the substrate.

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