Display panel and display device

Abstract

The present disclosure provides a display panel and a display device, wherein the display panel includes a first display area and a second display area. The first display area includes multiple built-in light-emitting devices and at least one first driving circuit, wherein the multiple built-in light-emitting devices include a first light-emitting device and a second light-emitting device, and the first driving circuit is connected to the first light-emitting device, and the first driving circuit is used to drive the first light-emitting device to emit light; the second display area includes at least one third light-emitting device and multiple external driving circuits, wherein the multiple external driving circuits include a second driving circuit and a third driving circuit, wherein the second driving circuit is connected to the second light-emitting device via a lead, and the second driving circuit is used to drive the second light-emitting device to emit light, and the third driving circuit is connected to the third light-emitting device, and the third driving circuit is used to drive the third light-emitting device to emit light. The technical solution disclosed in the present disclosure can reduce the number of leads, shorten the lead length, improve the display image quality and display uniformity, and improve the transmittance of the first display area.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Compared to traditional liquid crystal displays (LCDs), organic light-emitting diodes (OLEDs) offer advantages such as self-luminescence, a wide color gamut, high contrast, and a thin and lightweight design. Due to their high screen-to-body ratio, OLED display panels are becoming the mainstream form factor in mobile phones.

[0003] With the continuous advancement of technology, under-screen cameras are one of the future development trends of full-screen displays. However, in related technologies, display products equipped with under-screen cameras still have many problems that need to be improved. Summary of the Invention

[0004] The present disclosure provides a display panel and a display device to improve display uniformity.

[0005] The present disclosure provides a display panel, comprising a first display area and a second display area, wherein the transmittance of the first display area is greater than the transmittance of the second display area;

[0006] The first display area includes a plurality of built-in light-emitting devices and at least one first driving circuit, the plurality of built-in light-emitting devices include a first light-emitting device and a second light-emitting device, the first driving circuit is connected to the first light-emitting device, and the first driving circuit is used to drive the first light-emitting device to emit light;

[0007] The second display area includes at least one third light-emitting device and multiple external driving circuits, the multiple external driving circuits include a second driving circuit and a third driving circuit, the second driving circuit is connected to the second light-emitting device through a lead, the second driving circuit is used to drive the second light-emitting device to emit light, the third driving circuit is connected to the third light-emitting device, and the third driving circuit is used to drive the third light-emitting device to emit light.

[0008] In an optional implementation, there are multiple third light-emitting devices, and in the direction of connecting the second light-emitting device and the second driving circuit, the external driving circuit and the third light-emitting devices are arranged periodically, and the arrangement period of the external driving circuit is smaller than the arrangement period of the third light-emitting devices.

[0009] In an optional implementation, the ratio of the arrangement period of the external driving circuit to the arrangement period of the third light-emitting device is greater than or equal to 1 / 2 and less than or equal to 9 / 10.

[0010] In an optional implementation, the first light-emitting device includes a first anode layer provided on a base substrate, and the third light-emitting device includes a second anode layer provided on the base substrate;

[0011] Among them, the ratio of the orthographic projection area of ​​the first driving circuit on the base substrate to the orthographic projection area of ​​the first anode layer on the base substrate is smaller than the ratio of the orthographic projection area of ​​the third driving circuit on the base substrate to the orthographic projection area of ​​the second anode layer on the base substrate.

[0012] In an optional implementation manner, the orthographic projection of the first anode layer on the base substrate covers the orthographic projection of the first driving circuit on the base substrate.

[0013] In an optional implementation, the first light-emitting device includes a green light-emitting device and / or a blue light-emitting device; the second light-emitting device includes at least one of the following: a green light-emitting device, a blue light-emitting device and a red light-emitting device.

[0014] In an optional implementation, the first light-emitting device includes a red light-emitting device and / or a blue light-emitting device; the second light-emitting device includes at least one of the following: a green light-emitting device, a blue light-emitting device and a red light-emitting device.

[0015] In an optional implementation, the first light-emitting device includes a green light-emitting device and / or a red light-emitting device; the second light-emitting device includes at least one of the following: a green light-emitting device, a blue light-emitting device and a red light-emitting device.

[0016] In an optional implementation, the number of the first light-emitting devices is greater than or equal to the number of the second light-emitting devices.

[0017] In an optional implementation, the second light-emitting device includes a green light-emitting device, a blue light-emitting device and a red light-emitting device, the lead connecting the green light-emitting device and the second driving circuit is a first lead, the lead connecting the red light-emitting device and the second driving circuit is a second lead, and the lead connecting the blue light-emitting device and the second driving circuit is a third lead, the area of ​​the first lead is less than or equal to the area of ​​the second lead, and the area of ​​the second lead is less than or equal to the area of ​​the third lead.

[0018] In an optional implementation, the signal line connected to the first driving circuit includes a first line segment and a second line segment, the first line segment is connected to the second line segment, the first line segment is located in the first display area, the second line segment is located in the second display area, the material of the first line segment is a transparent conductive material, and the material of the second line segment is a metal material.

[0019] In an optional implementation, the lead is made of a transparent conductive material, and the lead and the first line segment are located in different film layers.

[0020] In an optional implementation, the pixel density of the first display area is less than or equal to the pixel density of the second display area.

[0021] In an optional implementation, the second display area surrounds the first display area.

[0022] The present disclosure provides a display device, comprising: an under-screen camera and any one of the display panels, wherein the orthographic projection of the under-screen camera on the display panel overlaps with a first display area.

[0023] Compared with the prior art, the present disclosure has the following advantages:

[0024] The display panel and display device provided by the present disclosure can reduce the number of leads connecting the built-in light-emitting device and the external drive circuit by arranging the first drive circuit connected to the first light-emitting device in the first display area, thereby reducing the diffraction effect caused by the leads and improving the picture quality; the lead length can also be shortened, thereby reducing the coupling capacitance caused by the leads and improving the display uniformity of the first display area; in addition, by arranging the second drive circuit connected to the second light-emitting device in the second display area, the transmittance of the first display area can be improved.

[0025] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following is a brief introduction to the drawings required for the description of the embodiments or related technologies. Obviously, the drawings described below are some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. It should be noted that the scales in the drawings are for illustration only and do not represent the actual scale.

[0027] Figure 1 Schematically shows a planar structural diagram of a display panel;

[0028] Figure 2 Schematically shows a structural diagram of a third light-emitting device and an external driving circuit;

[0029] Figure 3 Schematically shows a structural diagram of another third light-emitting device and an external driving circuit;

[0030] Figure 4 Schematically shows a cross-sectional structural diagram of a display panel;

[0031] Figure 5 Schematically shows a planar structural diagram comparing the first display area and the second display area;

[0032] Figure 6 Another schematic diagram of the planar structure comparing the first display area and the second display area is shown schematically;

[0033] Figure 7 Schematically shows a cross-sectional structural diagram of a signal line;

[0034] Figure 8 The figure schematically shows a structural diagram of a pixel circuit. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0036] In related art, display panels only feature light-emitting devices in the camera area. The drive signals that control the light-emitting devices are derived from the horizontally aligned pixel circuits. The leads that transmit the drive signals are made of transparent conductive material. The inventors discovered that the varying lengths of the leads lead to significant variations in coupling capacitance, which in turn results in poor display uniformity across the display panel.

[0037] To solve the above problem, an embodiment of the present disclosure provides a display panel including a first display area 11 and a second display area 12 , wherein the transmittance of the first display area 11 is greater than the transmittance of the second display area 12 .

[0038] The first display area 11 includes multiple built-in light-emitting devices 13 and at least one first driving circuit 14. The multiple built-in light-emitting devices 13 include a first light-emitting device 131 and a second light-emitting device 132. The first driving circuit 14 is connected to the first light-emitting device 131 and is used to drive the first light-emitting device 131 to emit light.

[0039] The second display area 12 includes at least one third light-emitting device 15 and multiple external driving circuits 16. The multiple external driving circuits 16 include a second driving circuit 161 and a third driving circuit 162. The second driving circuit 161 is connected to the second light-emitting device 132 through a lead 17. The second driving circuit 161 is used to drive the second light-emitting device 132 to emit light. The third driving circuit 162 is connected to the third light-emitting device 15. The third driving circuit 162 is used to drive the third light-emitting device 15 to emit light.

[0040] In this embodiment, the direction of connecting the second light emitting device 132 and the second driving circuit 161 is defined as the first direction. Figure 1 shown.

[0041] The second display area 12 is located on at least one side of the first display area 11 along the first direction. Optionally, the second display area 12 may surround the first display area 11.

[0042] The first light-emitting device 131 , the second light-emitting device 132 and the third light-emitting device 15 may all be organic light-emitting devices or quantum dot light-emitting devices, which is not limited in the present disclosure.

[0043] The shape of the first display area 11 can be rectangular, square, circular, or elliptical, etc., which is not limited in the present disclosure.

[0044] The display panel provided in this embodiment can reduce the number of leads 17 connecting the built-in light-emitting device 13 and the external drive circuit 16 by setting the first drive circuit 14 connected to the first light-emitting device 131 in the first display area 11, thereby reducing the diffraction effect caused by the leads 17 and improving the picture quality; it can also shorten the length of the leads 17, thereby reducing the coupling capacitance caused by the leads 17 and improving the display uniformity of the first display area 11; in addition, by setting the second drive circuit 161 connected to the second light-emitting device 132 in the second display area 12, the transmittance of the first display area 11 can be improved.

[0045] Since the number of leads 17 is reduced, the length of the leads 17 can be shortened through optimized design, which reduces the coupling capacitance and thus reduces the impact of the coupling capacitance on the turn-on voltage, thereby improving display uniformity. In addition, reducing the number of leads 17 can also increase process stability.

[0046] In a specific implementation, there may be multiple third light-emitting devices 15. In the first direction, the external drive circuit 16 and the third light-emitting devices 15 may both be arranged periodically. The arrangement period of the external drive circuit 16 and the arrangement period of the third light-emitting devices 15 may be the same or different.

[0047] like Figure 2As shown, in the first direction, the arrangement period p2 of the external driving circuit 16 is the same as the arrangement period p1 of the third light emitting devices 15 , for example, both are 31.6 μm.

[0048] In an optional implementation, Figure 3 As shown, the arrangement period p2 of the external driving circuit 16 is smaller than the arrangement period p1 of the third light-emitting devices 15 .

[0049] In this implementation, if Figure 3 As shown, the external drive circuit 16 and the third light-emitting devices 15 have different arrangement periods in the first direction. For example, the arrangement period p2 of the external drive circuit 16 is 27.6 μm, while the arrangement period p1 of the third light-emitting devices 15 is 31.6 μm. The arrangement period p1 of the third light-emitting devices 15 is 4 μm wider than the arrangement period p2 of the external drive circuit 16 in the first direction.

[0050] In this implementation, if Figure 3 As shown, by setting a smaller arrangement period of the external drive circuit 16 in the second display area 12, the number of the external drive circuits 16 can be greater than the number of the third light-emitting devices 15 in the first direction of the second display area 12, ensuring that each third light-emitting device 15 has a corresponding external drive circuit 16, namely the third drive circuit 162 connected, to ensure the normal display of the second display area 12. In addition, there is an external drive circuit 16 that is not connected to any third light-emitting device 15, namely the second drive circuit 161. The second drive circuit 161 can be connected to the second light-emitting device 132 in the first display area 11 to drive the second light-emitting device 132 in the first display area 11.

[0051] In this way, without sacrificing pixel density, the second driving circuit 161 connected to the second light-emitting device 132 is set in the second display area 12, thereby improving the transmittance of the first display area 11 and ensuring that the first display area 11 has high display uniformity.

[0052] The following is an example, refer to Figure 1Assuming the first display area 11 is a circular area, the arrangement period p1 of the third light-emitting devices 15 in the first direction is 31.6 μm, and the arrangement period p2 of the external drive circuits 16 in the first direction is 27.6 μm. Assuming there are 48 second light-emitting devices 132 in a row along the first direction within the first display area 11, 48 redundant second drive circuits 161 are required within the second display area 12 to control the illumination of these second light-emitting devices 132. Therefore, a total of 48*27.6 μm of space must be squeezed out to accommodate these 48 redundant second drive circuits 161. Since each third light-emitting device 15 can be squeezed out to occupy 4 μm of space, the number of corresponding third light-emitting devices 15 is 48*27.6 μm / 4 μm, which is rounded to 332. In other words, 332 third drive circuits 162 and 48 second drive circuits 161 can be arranged within a space of 332*31.6 μm. The 332 third driving circuits 162 are used to drive the 332 third light-emitting devices 15 in the second display area 12 to emit light, and the 48 second driving circuits 161 are used to drive the 48 second light-emitting devices 132 in the first display area 11 to emit light.

[0053] Optionally, the ratio between the arrangement period p2 of the external driving circuit 16 and the arrangement period p1 of the third light emitting device 15 can be greater than or equal to 1 / 2 and less than or equal to 9 / 10, which is not limited in the present disclosure. For example, the ratio can be 2 / 3, 3 / 4, 4 / 5, 5 / 6, 6 / 7, 7 / 8, 8 / 9, etc. Figure 3 As shown, the ratio between the arrangement period p2 of the external driving circuit 16 and the arrangement period p1 of the third light emitting devices 15 is 4 / 5.

[0054] like Figure 4 As shown, the first light-emitting device 131 may include a first anode layer 41 disposed on a base substrate 40, and may further include a first light-emitting layer 42 and a first cathode layer 43 disposed on a side of the first anode layer 41 facing away from the base substrate 40, with the first light-emitting layer 42 disposed between the first anode layer 41 and the first cathode layer 43. The first driving circuit 14 may be disposed on a side of the first anode layer 41 close to the base substrate 40, that is, between the base substrate 40 and the first anode layer 41.

[0055] like Figure 4 As shown, the third light-emitting device 15 may include a second anode layer 44 disposed on a base substrate 40, and may further include a second light-emitting layer 45 and a second cathode layer 46 disposed on a side of the second anode layer 44 facing away from the base substrate 40, with the second light-emitting layer 45 disposed between the second anode layer 44 and the second cathode layer 46. The third driving circuit 162 may be disposed on a side of the second anode layer 44 close to the base substrate 40, that is, between the base substrate 40 and the second anode layer 44.

[0056] In an optional implementation, referring to Figure 4 and Figure 5 , the ratio of the orthographic projection area of ​​the first driving circuit 14 on the base substrate 40 to the orthographic projection area of ​​the first anode layer 41 on the base substrate 40 is smaller than the ratio of the orthographic projection area of ​​the third driving circuit 162 on the base substrate 40 to the orthographic projection area of ​​the second anode layer 44 on the base substrate 40.

[0057] The orthographic projection areas of the second driving circuit 161 and the third driving circuit 162 on the base substrate 40 may be the same.

[0058] like Figure 4 and Figure 5 As shown, when the orthographic projection area of ​​the first anode layer 41 on the base substrate 40 is equal to the orthographic projection area of ​​the second anode layer 44 on the base substrate 40, the orthographic projection area of ​​the first drive circuit 14 on the base substrate 40 is smaller than the orthographic projection area of ​​the third drive circuit 162 on the base substrate 40.

[0059] In this implementation, the drive circuit within the first display area 11, i.e., the first drive circuit 14, is compressed more relative to the first anode layer 41 than the external drive circuit 16. Because drive circuits typically include multiple metal layers and have poor transmittance, in this implementation, by properly designing the positional relationship between the first anode layer 41 and the first drive circuit 14, the impact of the first drive circuit 14 on the aperture ratio of the first display area 11 can be reduced, thereby improving the aperture ratio of the first display area 11.

[0060] Alternatively, as Figure 4 and 6 As shown, the orthographic projection of the first anode layer 41 on the base substrate 40 can cover the orthographic projection of the first driving circuit 14 on the base substrate 40. Since the transmittance of the driving circuit is relatively poor, the transmittance of the first display area 11 can be further improved by providing the first anode layer 41 to completely cover the first driving circuit 14.

[0061] In this embodiment, the first light-emitting device 131 may include one or more light-emitting devices such as a green light-emitting device, a blue light-emitting device, a red light-emitting device, and a white light-emitting device, which is not limited in the present disclosure.

[0062] All built-in light-emitting devices 13 in the first display area 11 except the first light-emitting device 131 may be second light-emitting devices 132. The second light-emitting device 132 may include one or more light-emitting devices such as green light-emitting devices, blue light-emitting devices, red light-emitting devices, and white light-emitting devices, which is not limited in the present disclosure.

[0063] In a first optional implementation, the first light emitting device 131 includes a green light emitting device and / or a blue light emitting device. In this implementation, the first light emitting device 131 may include a green light emitting device, a blue light emitting device, or a green light emitting device and a blue light emitting device.

[0064] In a second optional implementation, the first light emitting device 131 includes a red light emitting device and / or a blue light emitting device. In this implementation, the first light emitting device 131 may include a red light emitting device, a blue light emitting device, or both a red light emitting device and a blue light emitting device.

[0065] In a second optional implementation, the first light emitting device 131 includes a green light emitting device and / or a red light emitting device. In this implementation, the first light emitting device 131 may include a green light emitting device, a red light emitting device, or a red light emitting device and a green light emitting device.

[0066] Since the green light emitting device is more sensitive to the capacitance caused by the lead 17 , when the first light emitting device 131 includes a green light emitting device, the uniformity of the display image can be further improved.

[0067] Since the anode area of ​​the blue light emitting device is larger, when the first light emitting device 131 includes a blue light emitting device, the influence of the first driving circuit 14 connected to the blue light emitting device on the aperture ratio can be reduced, which helps to improve the transmittance of the first display area 11.

[0068] In an optional implementation, the number of the first light-emitting devices 131 may be greater than or equal to the number of the second light-emitting devices 132 .

[0069] For all colors of built-in light-emitting devices 13, the ratio between the number of first light-emitting devices 131 and the number of second light-emitting devices 132 can be greater than or equal to 1. This means that a higher proportion of built-in light-emitting devices 13 are located within the first display area 11, further reducing the number of leads and improving image quality. In a specific implementation, the ratio between the number of first light-emitting devices 131 and the number of second light-emitting devices 132 for all colors of built-in light-emitting devices 13 can be, for example, 2:1, 3:1, etc. The specific value can be set according to actual needs and is not limited by this disclosure.

[0070] For the built-in light-emitting devices 13 of the same color, all of them may be first light-emitting devices 131 ; all of them may be second light-emitting devices 132 ; or some of them may be first light-emitting devices 131 and the rest may be second light-emitting devices 132 .

[0071] Optionally, within the built-in light-emitting devices 13 of the same color, the number of first light-emitting devices 131 can be greater than or equal to the number of second light-emitting devices 132. This can further reduce the number of leads and improve image quality. In a specific implementation, within the built-in light-emitting devices 13 of the same color, the ratio between the number of first light-emitting devices 131 and the number of second light-emitting devices 132 can be, for example, 2:1, 3:1, etc. The specific value can be set according to actual needs and is not limited in this disclosure.

[0072] In an optional implementation, the second light-emitting device 132 includes a green light-emitting device, a blue light-emitting device and a red light-emitting device, the lead 17 connecting the green light-emitting device and the second driving circuit 161 is the first lead, the lead 17 connecting the red light-emitting device and the second driving circuit 161 is the second lead, and the lead 17 connecting the blue light-emitting device and the second driving circuit 161 is the third lead.

[0073] The area of ​​the first lead may be smaller than or equal to the area of ​​the second lead, and the area of ​​the second lead may be smaller than or equal to the area of ​​the third lead.

[0074] Since the sensitivity of the green light emitting device, the red light emitting device and the blue light emitting device to the coupling capacitance caused by the lead 17 decreases successively, by setting the area of ​​the first lead to be less than or equal to the area of ​​the second lead, and the area of ​​the second lead to be less than or equal to the area of ​​the third lead, the overall influence of the coupling capacitance can be reduced, the picture display quality can be further improved, and the uniformity of the display picture can be improved.

[0075] When the first, second and third leads have the same width perpendicular to their respective extension directions, the length of the first lead can be set to be less than or equal to that of the second lead, and the length of the second lead can be set to be less than or equal to that of the third lead.

[0076] In an optional implementation, Figure 1 and Figure 7 As shown, the signal line 18 connected to the first driving circuit 14 includes a first line segment 181 and a second line segment 182 . The first line segment 181 is connected to the second line segment 182 . The first line segment 181 is located in the first display area 11 , and the second line segment 182 is located in the second display area 12 .

[0077] The first line segment 181 and the second line segment 182 can be provided in different film layers. For example, an insulating layer can be provided between the two. The first line segment 181 and the second line segment 182 can be connected through a via provided on the insulating layer. Figure 7 The first line segment 181 and the second line segment 182 can also be provided in the same film layer and connected by overlapping, which is not limited in the present disclosure.

[0078] The signal line 18 may be, for example, a gate signal line (eg, Figure 8 The first scanning signal line Ga1 or the second scanning signal line Ga2), the light emitting control signal line (such as Figure 8 The first light emitting control signal line EM1 or the second light emitting control signal line EM2), the data signal line (such as Figure 8 Data line Vd in), reset control signal line (such as Figure 8 a first reset control signal line Rst1 or a second reset control signal line Rst2), a power signal line, a reset signal line, etc.

[0079] The material of the first line segment 181 may be a transparent conductive material.

[0080] The second line segment 182 may be made of a metal material.

[0081] The transparent conductive material may be a metal, a metal oxide, an inorganic material, an organic material, or a composite material. Specifically, the transparent conductive material may be indium tin oxide (ITO), indium zinc oxide (IZO), carbon nanotubes, nanosilver, or graphene, etc., which is not limited in this disclosure.

[0082] For example, the material of the lead 17 can be ITO. The material of the first line segment 181 can be ITO or nanosilver. Since nanosilver has low sheet resistance and high transmittance, using nanosilver as the material for the first line segment 181 can reduce the resistance of the first line segment 181 and improve the transmittance of the first display area 11.

[0083] Alternatively, as Figure 7 As shown, the lead 17 and the first line segment 181 are located in different film layers. By arranging the lead 17 and the first line segment 181 on two film layers, the wiring space can be increased, thereby facilitating the realization of a high pixel density first display area 11. Figure 7 As shown, an insulating material may be provided between the lead 17 and the first line segment 181 .

[0084] In one optional implementation, the pixel density of the first display area 11 is less than or equal to the pixel density of the second display area 12. Pixel density refers to the number of light-emitting devices per inch. When the pixel density of the first display area 11 is less than that of the second display area 12, the transmittance of the first display area 11 can be further improved.

[0085] In this embodiment, the circuit structures of the first driving circuit 14 , the second driving circuit 161 and the third driving circuit 162 may be the same or different, which is not limited in the present disclosure.

[0086] Optionally, at least one of the first drive circuit 14, the second drive circuit 161 and the third drive circuit 162 is as follows Figure 8 The pixel circuit 221 is shown. Figure 8 The organic light emitting element 220 in the embodiment may be the first light emitting device 131 , the second light emitting device 132 or the third light emitting device 15 .

[0087] like Figure 8 As shown, the pixel circuit 221 includes a first light emitting control circuit 223 , a second light emitting control circuit 224 and a driving module 222 .

[0088] The driving module 222 includes a control terminal, a first terminal, and a second terminal, and is configured to provide a driving current to the organic light-emitting element 220 to drive the organic light-emitting element 220 to emit light. For example, the first light-emitting control circuit 223 is connected to the first terminal of the driving module 222 and the first voltage terminal VDD, and is configured to connect or disconnect the driving module 222 and the first voltage terminal VDD. The second light-emitting control circuit 224 is electrically connected to the second terminal of the driving module 222 and the first electrode of the organic light-emitting element 220, and is configured to connect or disconnect the driving module 222 and the organic light-emitting element 220.

[0089] For example, Figure 8 As shown, the pixel circuit 221 further includes a data writing circuit 226, a storage circuit 227, a threshold compensation circuit 228, and a reset circuit 229. The data writing circuit 226 is electrically connected to a first terminal of the driving module 222 and is configured to write a data signal into the storage circuit 227 under the control of a scan signal; the storage circuit 227 is electrically connected to a control terminal and a first voltage terminal VDD of the driving module 222 and is configured to store the data signal; the threshold compensation circuit 228 is electrically connected to a control terminal and a second terminal of the driving module 222 and is configured to perform threshold compensation on the driving module 222; the reset circuit 229 is electrically connected to the control terminal of the driving module 222 and a first electrode of the organic light-emitting element 220 and is configured to reset the control terminal of the driving module 222 and the first electrode of the organic light-emitting element 220 under the control of a reset control signal.

[0090] For example, Figure 8 As shown, the driving module 222 includes a driving transistor T1 , the control end of the driving module 222 includes the gate of the driving transistor T1 , the first end of the driving module 222 includes the first electrode of the driving transistor T1 , and the second end of the driving module 222 includes the second electrode of the driving transistor T1 .

[0091] For example, Figure 8As shown, the data write circuit 226 includes a data write transistor T2, the storage circuit 227 includes a capacitor C, the threshold compensation circuit 228 includes a threshold compensation transistor T3, the first light-emitting control circuit 223 includes a first light-emitting control transistor T4, the second light-emitting control circuit 224 includes a second light-emitting control transistor T5, the reset circuit 229 includes a first reset transistor T6 and a second reset transistor T7, and the reset control signal may include a first sub-reset control signal and a second sub-reset control signal.

[0092] For example, Figure 8 As shown, the first electrode of the data writing transistor T2 is electrically connected to the first electrode of the driving transistor T1, the second electrode of the data writing transistor T2 is configured to be electrically connected to the data line Vd to receive the data signal, and the gate of the data writing transistor T2 is configured to be electrically connected to the first scanning signal line Ga1 to receive the scanning signal; the first electrode of the capacitor C is electrically connected to the first power supply terminal VDD, and the second electrode of the capacitor C is electrically connected to the gate of the driving transistor T1; the first electrode of the threshold compensation transistor T3 is electrically connected to the second electrode of the driving transistor T1, the second electrode of the threshold compensation transistor T3 is electrically connected to the gate of the driving transistor T1, and the gate of the threshold compensation transistor T3 is configured to be electrically connected to the second scanning signal line Ga2 to receive the compensation control signal; the first electrode of the first reset transistor T6 is configured to be electrically connected to the first reset power supply terminal Vinit1 to receive the first reset signal, the second electrode of the first reset transistor T6 is electrically connected to the gate of the driving transistor T1, and the gate of the first reset transistor T6 is configured to be electrically connected to the first reset control signal line Rst1 to receive the first sub-reset control signal; A first electrode of the reset transistor T7 is configured to be electrically connected to the second reset power supply terminal Vinit2 to receive a second reset signal, a second electrode of the second reset transistor T7 is electrically connected to the first electrode of the organic light emitting element 220, and a gate of the second reset transistor T7 is configured to be electrically connected to the second reset control signal line Rst2 to receive a second sub-reset control signal; a first electrode of the first light emitting control transistor T4 is electrically connected to the first power supply terminal VDD, a second electrode of the first light emitting control transistor T4 is electrically connected to the first electrode of the driving transistor T1, and a gate of the first light emitting control transistor T4 is configured to be electrically connected to the first light emitting control signal line EM1 to receive the first light emitting control signal; a first electrode of the second light emitting control transistor T5 is electrically connected to the second electrode of the driving transistor T1, a second electrode of the second light emitting control transistor T5 is electrically connected to the second electrode of the organic light emitting element 220, and a gate of the second light emitting control transistor T5 is configured to be electrically connected to the second light emitting control signal line EM2 to receive the second light emitting control signal; and a first electrode of the organic light emitting element 220 is electrically connected to the second power supply terminal VSS.

[0093] For example, one of the first power supply terminal VDD and the second power supply terminal VSS is a high voltage terminal, and the other is a low voltage terminal. Figure 8 In the illustrated embodiment, the first power supply terminal VDD is a voltage source that outputs a constant first voltage, which is a positive voltage; and the second power supply terminal VSS is a voltage source that outputs a constant second voltage, which is a negative voltage, etc. For example, in some examples, the second power supply terminal VSS can be grounded.

[0094] For example, Figure 8 As shown, the scan signal and the compensation control signal can be the same, that is, the gate of the data write transistor T2 and the gate of the threshold compensation transistor T3 can be electrically connected to the same signal line, such as the first scan signal line Ga1, to receive the same signal (e.g., the scan signal). In this case, the display substrate 1000 can be provided with no second scan signal line Ga2, thereby reducing the number of signal lines. For another example, the gate of the data write transistor T2 and the gate of the threshold compensation transistor T3 can also be electrically connected to different signal lines, that is, the gate of the data write transistor T2 is electrically connected to the first scan signal line Ga1, and the gate of the threshold compensation transistor T3 is electrically connected to the second scan signal line Ga2, and the first scan signal line Ga1 and the second scan signal line Ga2 transmit the same signal.

[0095] It should be noted that the scanning signal and the compensation control signal may also be different, so that the gate of the data writing transistor T2 and the threshold compensation transistor T3 can be controlled separately and independently, thereby increasing the flexibility of controlling the pixel circuit.

[0096] For example, Figure 8 As shown, the first emission control signal and the second emission control signal can be the same, that is, the gate of the first emission control transistor T4 and the gate of the second emission control transistor T5 can be electrically connected to the same signal line, such as the first emission control signal line EM1, to receive the same signal (e.g., the first emission control signal). In this case, the display substrate 1000 can be provided with no second emission control signal line EM2, thereby reducing the number of signal lines. For another example, the gate of the first emission control transistor T4 and the gate of the second emission control transistor T5 can also be electrically connected to different signal lines, that is, the gate of the first emission control transistor T4 is electrically connected to the first emission control signal line EM1, and the gate of the second emission control transistor T5 is electrically connected to the second emission control signal line EM2, and the first emission control signal line EM1 and the second emission control signal line EM2 transmit the same signal.

[0097] It should be noted that when the first light-emitting control transistor T4 and the second light-emitting control transistor T5 are different types of transistors, for example, the first light-emitting control transistor T4 is a P-type transistor and the second light-emitting control transistor T5 is an N-type transistor, the first light-emitting control signal and the second light-emitting control signal may also be different, and the embodiments of the present disclosure do not limit this.

[0098] For example, the first sub-reset control signal and the second sub-reset control signal can be the same, that is, the gate of the first reset transistor T6 and the gate of the second reset transistor T7 can be electrically connected to the same signal line, such as the first reset control signal line Rst1, to receive the same signal (e.g., the first sub-reset control signal). In this case, the display substrate 1000 can be provided with no second reset control signal line Rst2, thereby reducing the number of signal lines. For another example, the gate of the first reset transistor T6 and the gate of the second reset transistor T7 can also be electrically connected to different signal lines, that is, the gate of the first reset transistor T6 is electrically connected to the first reset control signal line Rst1, and the gate of the second reset transistor T7 is electrically connected to the second reset control signal line Rst2, and the first reset control signal line Rst1 and the second reset control signal line Rst2 transmit the same signal. It should be noted that the first sub-reset control signal and the second sub-reset control signal can also be different.

[0099] For example, in some examples, the second sub-reset control signal may be the same as the scan signal, ie, the gate of the second reset transistor T7 may be electrically connected to the first scan signal line Ga1 to receive the scan signal as the second sub-reset control signal.

[0100] For example, the gate of the first reset transistor T6 and the source of the second reset transistor T7 are connected to the first reset power supply terminal Vinit1 and the second reset power supply terminal Vinit2, respectively. The first reset power supply terminal Vinit1 and the second reset power supply terminal Vinit2 can be DC reference voltage terminals to output a constant DC reference voltage. The first reset power supply terminal Vinit1 and the second reset power supply terminal Vinit2 can be the same, for example, the gate of the first reset transistor T6 and the source of the second reset transistor T7 are connected to the same reset power supply terminal. The first reset power supply terminal Vinit1 and the second reset power supply terminal Vinit2 can be high voltage terminals or low voltage terminals, as long as they can provide the first reset signal and the second reset signal to reset the gate of the driving transistor T1 and the first electrode of the light-emitting element 220. This disclosure is not limited to this.

[0101] It should be noted that Figure 8 The driving module 222, data writing circuit 226, storage circuit 227, threshold compensation circuit 228 and reset circuit 229 in the pixel circuit shown are only for illustration. The specific structures of the circuits such as the driving module 222, data writing circuit 226, storage circuit 227, threshold compensation circuit 228 and reset circuit 229 can be set according to actual application requirements, and the embodiments of the present disclosure do not make specific limitations on this.

[0102] For example, according to the characteristics of transistors, transistors can be divided into N-type transistors and P-type transistors. For the sake of clarity, the embodiments of the present disclosure use P-type transistors (e.g., P-type MOS transistors) as an example to describe the technical solutions of the present disclosure in detail. That is, in the description of the present disclosure, the driving transistor T1, the data writing transistor T2, the threshold compensation transistor T3, the first light-emitting control transistor T4, the second light-emitting control transistor T5, the first reset transistor T6, and the second reset transistor T7 can all be P-type transistors. However, the transistors of the embodiments of the present disclosure are not limited to P-type transistors. Those skilled in the art can also use N-type transistors (e.g., N-type MOS transistors) to implement the functions of one or more transistors in the embodiments of the present disclosure according to actual needs.

[0103] It should be noted that the transistors used in the embodiments of the present disclosure may be thin film transistors or field effect transistors or other switching devices with the same characteristics. The thin film transistors may include oxide semiconductor thin film transistors, amorphous silicon thin film transistors or polycrystalline silicon thin film transistors, etc. The source and drain of the transistor may be symmetrical in structure, so the source and drain may be indistinguishable in physical structure. In the embodiments of the present disclosure, in order to distinguish the transistors, except for the gate as the control electrode, one of the electrodes is directly described as the first electrode and the other electrode is directly described as the second electrode, so the first electrode and the second electrode of all or part of the transistors in the embodiments of the present disclosure can be interchangeable as needed.

[0104] It should be noted that, in the embodiment of the present disclosure, the pixel circuit of the sub-pixel can be Figure 8 In addition to the 7T1C structure (i.e., seven transistors and one capacitor) shown, a structure including other numbers of transistors may also be used, such as a 7T2C structure, a 6T1C structure, a 6T2C structure, or a 9T2C structure, which is not limited in the embodiments of the present disclosure.

[0105] An embodiment of the present disclosure provides a display device, comprising: an under-screen camera and a display panel as described in any one of the items, wherein the orthographic projection of the under-screen camera on the display panel overlaps with a first display area.

[0106] Those skilled in the art will appreciate that the display device has all the features and advantages of the display panel described above.

[0107] In some embodiments, specific types of the display device include but are not limited to mobile phones, notebooks, iPads, Kindles, televisions, and other display devices with display and camera functions.

[0108] Those skilled in the art will understand that, in addition to the display panel described above, the display device may also include structures or components necessary for a conventional display device. Taking a mobile phone as an example, in addition to the display panel described above, it also includes necessary structures or components such as a glass cover, a battery back cover, a middle frame, a mainboard, a touch module, an audio module, and a camera module.

[0109] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0110] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, commodity, or device that includes the element.

[0111] The above is a detailed introduction to a display panel and a display device provided by the present disclosure. Specific examples are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core idea of ​​the present disclosure. At the same time, for those skilled in the art, according to the idea of ​​the present disclosure, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present disclosure.

[0112] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0113] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0114] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Furthermore, please note that instances of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0115] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0116] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A display panel, characterized in that: comprising a first display area and a second display area, wherein the transmittance of the first display area is greater than the transmittance of the second display area; The first display area includes a plurality of built-in light-emitting devices and at least one first driving circuit, the plurality of built-in light-emitting devices include a first light-emitting device and a second light-emitting device, the first driving circuit is connected to the first light-emitting device, and the first driving circuit is used to drive the first light-emitting device to emit light; The second display area includes at least one third light-emitting device and multiple external drive circuits, the multiple external drive circuits include a second drive circuit and a third drive circuit, the second drive circuit is connected to the second light-emitting device via a lead, the second drive circuit is used to drive the second light-emitting device to emit light, the third drive circuit is connected to the third light-emitting device, and the third drive circuit is used to drive the third light-emitting device to emit light; There are multiple third light-emitting devices, and in the direction connecting the second light-emitting device and the second driving circuit, the external driving circuit and the third light-emitting devices are arranged periodically, and the arrangement period of the external driving circuit is smaller than the arrangement period of the third light-emitting devices; The ratio of the arrangement period of the external driving circuit to the arrangement period of the third light-emitting devices is greater than or equal to 1 / 2 and less than or equal to 9 / 10.

2. The display panel according to claim 1, wherein: The first light emitting device includes a first anode layer provided on a base substrate, and the third light emitting device includes a second anode layer provided on the base substrate; Among them, the ratio of the orthographic projection area of ​​the first driving circuit on the base substrate to the orthographic projection area of ​​the first anode layer on the base substrate is smaller than the ratio of the orthographic projection area of ​​the third driving circuit on the base substrate to the orthographic projection area of ​​the second anode layer on the base substrate.

3. The display panel according to claim 2, wherein: The orthographic projection of the first anode layer on the base substrate covers the orthographic projection of the first driving circuit on the base substrate.

4. The display panel according to claim 1, wherein: The first light-emitting device includes a green light-emitting device and / or a blue light-emitting device; the second light-emitting device includes at least one of the following: a green light-emitting device, a blue light-emitting device and a red light-emitting device.

5. The display panel according to claim 1, wherein: The first light-emitting device includes a red light-emitting device and / or a blue light-emitting device; the second light-emitting device includes at least one of the following: a green light-emitting device, a blue light-emitting device and a red light-emitting device.

6. The display panel according to claim 1, wherein: The first light emitting device includes a green light emitting device and / or a red light emitting device; the second light emitting device includes at least one of the following: a green light emitting device, a blue light emitting device and a red light emitting device.

7. The display panel according to claim 1, wherein: The number of the first light emitting devices is greater than or equal to the number of the second light emitting devices.

8. The display panel according to any one of claims 1 to 7, characterized in that: The second light-emitting device includes a green light-emitting device, a blue light-emitting device and a red light-emitting device. The lead connecting the green light-emitting device and the second driving circuit is a first lead, the lead connecting the red light-emitting device and the second driving circuit is a second lead, and the lead connecting the blue light-emitting device and the second driving circuit is a third lead. The area of ​​the first lead is less than or equal to the area of ​​the second lead, and the area of ​​the second lead is less than or equal to the area of ​​the third lead.

9. The display panel according to any one of claims 1 to 7, wherein: The signal line connected to the first driving circuit includes a first line segment and a second line segment, the first line segment is connected to the second line segment, the first line segment is located in the first display area, the second line segment is located in the second display area, the material of the first line segment is a transparent conductive material, and the material of the second line segment is a metal material.

10. The display panel according to claim 9, wherein: The lead wire is made of a transparent conductive material, and the lead wire and the first line segment are located in different film layers.

11. The display panel according to any one of claims 1 to 7, wherein: The pixel density of the first display area is less than or equal to the pixel density of the second display area.

12. The display panel according to any one of claims 1 to 7, wherein: The second display area surrounds the first display area.

13. A display device, characterized in that: include: An under-screen camera and a display panel as described in any one of claims 1 to 12, wherein the orthographic projection of the under-screen camera on the display panel overlaps with the first display area.

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