Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a plurality of pixel units, and each pixel unit comprises a plurality of light-emitting devices and a plurality of pixel circuits correspondingly connected with the light-emitting devices; the pixel circuit comprises at least two transistors, and the vertical projections of the at least two transistors in the thickness direction of the display panel are at least partially overlapped. According to the display panel, the vertical projections of at least two transistors in the transistors included in the pixel circuit in the display panel in the thickness direction of the display panel are at least partially overlapped, namely, the transistors are stacked, so that the area occupied by the transistors in the pixel circuit on the display panel can be reduced, the area of a light-proof area is further reduced, and the display effect is improved. And the transmittance of the display panel is improved.

Description

Technical Field

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

[0002] As a new display technology, transparent display technology has been widely used in display windows, shopping malls, stage design, building curtain walls, exhibition displays, car displays and other fields.

[0003] Compared with transparent technologies such as Liquid Crystal Display (LCD), Organic Light-Emitting Diode (OLED), etc., light-emitting diodes ( ( Transparent light-emitting diode (LED) display technology offers advantages such as large size, high transmittance, and high brightness. Currently, a rapidly developing transparent LED display is the glass-based, actively driven MLED transparent screen. Because the glass substrate itself is transparent, through the proper arrangement of metal traces on the display panel, the transmittance of glass-based MLED transparent screens can reach approximately 60%.

[0004] However, due to the fact that the area where the pixel circuit that drives the light-emitting device to emit light on the display panel is located is not light-transmissive and the area occupied by the pixel circuit is large, it is difficult to further improve the transmittance of the glass-based MLED transparent screen. Summary of the Invention

[0005] The present invention provides a display panel and a display device to improve the transmittance of the display panel.

[0006] According to one aspect of the present invention, there is provided a display panel comprising: a plurality of pixel units, each pixel unit comprising a plurality of light-emitting devices and a pixel circuit correspondingly connected to each of the light-emitting devices;

[0007] The pixel circuit includes at least two transistors, and vertical projections of the at least two transistors in the thickness direction of the display panel at least partially overlap.

[0008] Optionally, vertical projections of at least two of the transistors in the thickness direction of the display panel completely overlap.

[0009] Optionally, the at least two transistors in the pixel circuit include: a driving transistor and a data writing transistor, wherein the data writing transistor is respectively connected to a scan line, a data line and the driving transistor;

[0010] The driving transistor is further connected to a first power supply voltage line and an anode of the light emitting device; and a cathode of the light emitting device is connected to a second power supply voltage line.

[0011] Optionally, the display panel includes a first metal layer, a first dielectric layer, a first active layer, a second metal layer, a planarization layer, a third metal layer, a second dielectric layer, a second active layer and a fourth metal layer sequentially stacked on a substrate of the display panel;

[0012] The source of the data writing transistor is connected to the data line, the drain of the data writing transistor is connected to the gate of the driving transistor, the gate of the data writing transistor is connected to the scan line, the source of the driving transistor is connected to the first power supply voltage line, and the drain of the driving transistor is connected to the anode of the light emitting device;

[0013] The first active layer includes a channel region, a source region, and a drain region of the data write transistor; the gate of the data write transistor is formed in the first metal layer and is arranged corresponding to the channel region of the data write transistor; the source of the data write transistor is formed in the second metal layer and is connected to the source region of the data write transistor; the drain of the data write transistor is formed in the second metal layer and is connected to the drain region of the data write transistor;

[0014] The second active layer includes a channel region, a source region, and a drain region of the driving transistor; the gate of the driving transistor is formed in the third metal layer and is arranged corresponding to the channel region of the driving transistor; the source of the driving transistor is formed in the fourth metal layer and is connected to the source region of the driving transistor; the drain of the driving transistor is formed in the fourth metal layer and is connected to the drain region of the driving transistor;

[0015] The drain of the data writing transistor and the gate of the driving transistor in the same pixel circuit are connected through a via.

[0016] Optionally, the scan line is located in the first metal layer, the data line is located in the second metal layer, the first power supply voltage line is located in the fourth metal layer, and the second power supply voltage line is located in the fourth metal layer.

[0017] Optionally, the data line, the scan line, the first power supply voltage line, and the second power supply voltage line are all transparent metal lines.

[0018] Optionally, the multiple light-emitting devices in the same pixel unit include: a first color light-emitting device, a second color light-emitting device and a third color light-emitting device;

[0019] The first color light emitting device, the second color light emitting device and the third color light emitting device in the same pixel unit are stacked.

[0020] Optionally, the display panel includes a substrate, each of the pixel circuits is provided on the substrate, and a plurality of cathode-attached electrodes and a plurality of anode-attached electrodes are provided on the substrate;

[0021] The cathodes of the light-emitting devices in the same pixel unit are connected to the same cathode bonding electrode, and the anodes of different light-emitting devices in the same pixel unit are connected to different anode bonding electrodes; or

[0022] The anodes of the light-emitting devices in the same pixel unit are connected to the same anode bonding electrode, and the cathodes of different light-emitting devices in the same pixel unit are connected to different cathode bonding electrodes.

[0023] Optionally, the cathode and anode of each of the light-emitting devices are transparent electrodes;

[0024] and / or,

[0025] Each of the cathode-bonded electrodes and each of the anode-bonded electrodes are transparent electrodes.

[0026] Optionally, vertical projections of the light-emitting device and the pixel circuit in the thickness direction of the display panel at least partially overlap.

[0027] According to another aspect of the present invention, a micro LED display device is provided, comprising any one of the display panels described above.

[0028] The technical solution of the embodiment of the present invention can reduce the area occupied by the transistors in the pixel circuit on the display panel by arranging at least two of the transistors included in the pixel circuit in the display panel so that their vertical projections in the thickness direction of the display panel at least partially overlap, that is, arranging the transistors in a stacked manner, thereby reducing the area of ​​the opaque area and improving the transmittance of the display panel.

[0029] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 Schematic diagram of the structure of an existing glass-based MLED transparent display panel;

[0032] Figure 2 Schematic diagram of the specific structure of an existing glass-based MLED transparent display panel;

[0033] Figure 3 A circuit diagram of a pixel circuit in a display panel provided by an embodiment of the present invention;

[0034] Figure 4 A diagram showing the film structure of a display panel provided by an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of a tiled structure of transistors included in an existing pixel circuit;

[0036] Figure 6 A schematic structural diagram of a pixel unit in a display panel provided by an embodiment of the present invention;

[0037] Figure 7 This is a diagram showing the viewing angle when the light-emitting device in the existing display panel adopts a tiled structure;

[0038] Figure 8 This is a diagram showing an observation angle when the light-emitting devices of the display panel adopt a stacked structure in an embodiment of the present invention;

[0039] Figure 9 A schematic diagram of the distribution of lamination electrodes in a display panel provided by an embodiment of the present invention;

[0040] Figure 10 A schematic diagram of a layout of a display panel provided by an embodiment of the present invention;

[0041] Figure 11 A schematic diagram of the layout of another display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] Figure 1 It is a structural diagram of an existing glass-based MLED transparent display panel. Figure 2 The specific structural diagram of the existing glass-based MLED transparent display panel is as follows: Figure 1 and Figure 2 As shown, the metal traces on the glass-based display panel are evenly dispersed on the glass substrate, so that the display panel has a certain light transmittance. However, with the market demand for high-resolution display screens, the market demand for transparent screens with high-resolution image quality is also increasing. As the resolution increases, the pixel pitch is gradually shrinking, and the pixel circuit 1, the light-emitting device 2, and the metal traces that control the operation of the pixel circuit 1 and the light-emitting device 2 must be arranged in the pixel. Among them, the pad electrodes and metal traces of the pixel circuit 1 and the light-emitting device 2 are all non-transparent areas, so the MLED transparent display panel is limited to achieve a higher transmittance. The pixel circuit includes at least two transistors. For example, the pixel circuit includes at least a data writing transistor T1 and a driving transistor T2. The different transistors in each pixel circuit on the existing glass-based MLED transparent display panel adopt a tiled structure. For details, please refer to Figure 2 , while the transistor is not light-transmissive, which increases the area of ​​the light-impermeable region, resulting in a lower transmittance of the display panel.

[0045] In response to the above technical problems, an embodiment of the present invention provides a new display panel to increase the transmittance of the display panel. The display panel includes: a plurality of pixel units, each pixel unit including a plurality of light-emitting devices and a pixel circuit corresponding to each light-emitting device;

[0046] The pixel circuit includes at least two transistors, and vertical projections of the at least two transistors in a thickness direction of the display panel at least partially overlap.

[0047] Optionally, a pixel unit includes at least two light-emitting devices with different luminous colors, and one light-emitting device can be connected to a corresponding pixel circuit. The pixel circuit is used to generate a driving current according to the written data voltage to drive the corresponding light-emitting device to emit light. The pixel circuit includes at least two transistors, such as a data writing transistor and a driving transistor. The pixel circuit can be a 2T1C structure, a 5T1C structure or a 7T1C structure, and can also be other structures, which are not described here. Among all the transistors included in the pixel circuit, the projections of at least two transistors in the thickness direction of the display panel are at least partially overlapped. If the pixel circuit includes two transistors, the projections of the two transistors in the thickness direction of the display panel are at least partially overlapped. If the pixel circuit includes 5 or more transistors, the vertical projections of at least two transistors in the thickness direction of the display substrate at least partially overlap. It may be that the vertical projections of two of the five transistors in the thickness direction of the display substrate overlap, such as the vertical projections of the first transistor and the second transistor in the thickness direction of the display substrate at least partially overlap, and the vertical projections of the third transistor and the fourth transistor in the thickness direction of the display substrate at least partially overlap; or, the vertical projections of three of the five transistors in the thickness direction of the display substrate overlap; or, the vertical projections of four of the five transistors in the thickness direction of the display substrate overlap; or, the vertical projections of all the transistors in the pixel circuit in the thickness direction of the display panel at least partially overlap.

[0048] The technical solution of the embodiment of the present invention can reduce the area occupied by the transistors in the pixel circuit on the display panel, thereby reducing the area of ​​the opaque area and improving the transmittance of the display panel, by arranging at least two of the transistors included in the pixel circuit in the display panel so that their vertical projections in the thickness direction of the display panel at least partially overlap, that is, at least two transistors are stacked.

[0049] Optionally, the vertical projections of at least two transistors in the thickness direction of the display panel completely overlap. For example, if the pixel circuit includes only two transistors, the projections of the two transistors in the thickness direction of the display panel completely overlap. This can reduce the occupied area of ​​the pixel circuit by half compared to a tiled arrangement of the two transistors, further improving the transmittance of the display panel. When the pixel circuit includes five or seven transistors, for example, the projections of every two transistors in the thickness direction of the display panel can completely overlap, so as to ensure the transmittance of the display panel while also preventing the thickness of the display panel from being too thick.

[0050] Figure 3 A circuit diagram of a pixel circuit in a display panel provided by an embodiment of the present invention, with reference to Figure 3, Optionally, the at least two transistors in the pixel circuit include: a driving transistor T2 and a data writing transistor T1, the data writing transistor T1 being connected to the scan line Vscan, the data line Vdata and the driving transistor T2 respectively;

[0051] The driving transistor T2 is further connected to the first power supply voltage line VDD and the anode of the light emitting device 1 ; the cathode of the light emitting device 1 is connected to the second power supply voltage line Vss.

[0052] In this embodiment, the pixel circuit is exemplarily shown as a 2T1C structure, including a driving transistor T2, a data writing transistor T1, and a storage capacitor Cst. One end of the storage capacitor Cst is connected to the gate of the driving transistor T2, and the other end is connected to the anode of the light-emitting device 1, where the light-emitting device can be an LED. The data writing transistor T1 can be an N-type transistor or a P-type transistor, and the driving transistor T2 can be an N-type transistor or a P-type transistor, without limitation. In this embodiment, the driving transistor T2 and the data writing transistor T1 are both N-type transistors. The data writing transistor T1 is used to turn on in response to the effective potential on the scan line Vscan and write the data voltage transmitted on the data line Vdata into the driving transistor T2. The driving transistor T2 generates a driving current based on the data voltage to drive the light-emitting device 1 to emit light.

[0053] Figure 4 A film layer structure diagram of a display panel provided by an embodiment of the present invention, refer to Figure 3 and Figure 4 Optionally, the display panel includes a first metal layer 11, a first dielectric layer 12, a first active layer 13, a second metal layer, a planarization layer 15, a third metal layer 16, a second dielectric layer 17, a second active layer 18, and a fourth metal layer sequentially stacked on a substrate 20 of the display panel;

[0054] The source 14-1 of the data writing transistor T1 is connected to the data line Vdata, the drain 14-2 of the data writing transistor T1 is connected to the gate of the driving transistor T2, the gate of the data writing transistor T1 is connected to the scan line Vscan, the source 19-1 of the driving transistor T2 is connected to the first power supply voltage line VDD, and the drain 19-2 of the driving transistor T2 is connected to the anode of the light emitting device 1;

[0055] The first active layer 13 includes a channel region, a source region, and a drain region of the data write transistor T1; the gate of the data write transistor T1 is formed in the first metal layer 11 and is arranged corresponding to the channel region of the data write transistor T1; the source 14-1 of the data write transistor T1 is formed in the second metal layer and is connected to the source region of the data write transistor T1; the drain 14-2 of the data write transistor T1 is formed in the second metal layer and is connected to the drain region of the data write transistor T1;

[0056] The second active layer 18 includes a channel region, a source region, and a drain region of the driving transistor T2; the gate of the driving transistor T2 is formed in the third metal layer 16 and is arranged corresponding to the channel region of the driving transistor T2; the source electrode 19-1 of the driving transistor T2 is formed in the fourth metal layer and is connected to the source region of the driving transistor T2; the drain electrode 19-2 of the driving transistor T2 is formed in the fourth metal layer and is connected to the drain region of the driving transistor T2;

[0057] The drain 14 - 2 of the data writing transistor T1 and the gate of the driving transistor T2 in the same pixel circuit are connected through a via.

[0058] The scan line Vscan is located in the first metal layer 11 , the data line Vdata is located in the second metal layer, the first power voltage line VDD is located in the fourth metal layer, and the second power voltage line Vss is located in the fourth metal layer.

[0059] The gate of the data write transistor T1 is arranged corresponding to the channel region of the data write transistor T1, and the vertical projection of the channel region of the data write transistor T1 on the first metal layer 11 can at least partially overlap with the gate of the data write transistor T1. The source 14-1 of the data write transistor T1 is connected to the source region of the data write transistor T1, and the connection can be achieved by the source 14-1 of the data write transistor T1 directly contacting the source region of the data write transistor T1. The drain 14-2 of the data write transistor T1 is connected to the drain region of the data write transistor T1, and the connection can be achieved by the drain 14-2 of the data write transistor T1 directly contacting the drain region of the data write transistor T1.

[0060] The gate of the driving transistor T2 is arranged corresponding to the channel region of the driving transistor T2, and the vertical projection of the channel region of the driving transistor T2 on the third metal layer 16 may at least partially overlap with the gate of the driving transistor T2. The source 19-1 of the driving transistor T2 is connected to the source region of the driving transistor T2, and the connection may be achieved by the source 19-1 of the driving transistor T2 directly contacting the source region of the driving transistor T2. The drain 19-2 of the driving transistor T2 is connected to the drain region of the driving transistor T2, and the connection may be achieved by the drain 19-2 of the driving transistor T2 directly contacting the drain region of the driving transistor T2.

[0061] In this embodiment, the driving transistor T2 and the data writing transistor T1 are stacked, and the vertical projection of one transistor on the substrate of the display panel is located within the vertical projection of the other transistor on the substrate of the display panel, or the two projections overlap. Figure 5 , Figure 5 A schematic diagram of the tiled structure of transistors included in the existing pixel circuit is shown. Figure 5 Compared with the flat arrangement of the transistors in the embodiment, the stacking arrangement between different transistors in this embodiment can reduce the area occupied by the pixel circuit in the display panel, thereby reducing the area of ​​the opaque area in the display panel and improving the transmittance of the display panel.

[0062] Optionally, the vertical projections of the light-emitting device and the pixel circuit in the thickness direction of the display panel at least partially overlap. The pixel circuit includes at least two transistors, and the vertical projections of the light-emitting device and the pixel circuit in the thickness direction of the display panel at least partially overlap. The vertical projections of the light-emitting device and at least one transistor in the pixel circuit in the thickness direction of the display panel can partially overlap or completely overlap. Compared to the prior art in which the light-emitting device and the pixel circuit are arranged in a flat pattern, this embodiment can further reduce the area of ​​the opaque region and improve the transmittance of the display panel.

[0063] A pixel unit includes a package and a plurality of pixel circuits connected to the package, a package includes at least two light-emitting devices with different luminous colors, and the same package includes at least two light-emitting devices with different luminous colors stacked. Figure 6 A schematic diagram of a pixel unit in a display panel according to an embodiment of the present invention is provided. Figure 6 , Optionally, the multiple light-emitting devices in the same pixel unit include: a first color light-emitting device 21, a second color light-emitting device 22 and a third color light-emitting device 23;

[0064] The first color light emitting device 21 , the second color light emitting device 22 and the third color light emitting device 23 in the same pixel unit are stacked.

[0065] In this embodiment, a package is exemplified as including three light-emitting devices, which are a first color light-emitting device 21, a second color light-emitting device 22, and a third color light-emitting device 23. The first color light-emitting device can be a red light-emitting device R, the second color light-emitting device 22 can be a green light-emitting device G, and the third color light-emitting device 23 can be a blue light-emitting device B. In other embodiments, the light-emitting colors of the first color light-emitting device 21, the second color light-emitting device 22, and the third color light-emitting device 23 can also be arranged in other ways.

[0066] Compared to Figure 1 or Figure 2Different light-emitting devices in the same package are arranged in a flat manner. For example, the area of ​​the display panel occupied by each light-emitting device is A1, and the total area of ​​the three light-emitting devices in one package is 3*A1. In this embodiment, different light-emitting devices in the same package are stacked, that is, the total area of ​​the display panel occupied by the three light-emitting devices in one package is A1, which greatly reduces the area of ​​the display panel occupied by one package, thereby reducing the area of ​​the opaque area and improving the transmittance of the display panel.

[0067] Figure 7 This is a diagram showing the viewing angle when the light-emitting device in the existing display panel adopts a tiled structure. Figure 8 This is a diagram showing the viewing angle when the light emitting device of the display panel adopts a stacked structure in an embodiment of the present invention, referring to Figure 7 and Figure 8 In conventional display panels with tiled packages, when viewing the display screen from the left at a wide viewing angle, the screen appears reddish due to obstruction by the first-color light-emitting device 21 (red light-emitting device R). When viewing the display screen from the right at a wide viewing angle, the screen appears bluish due to obstruction by the third-color light-emitting device 23 (blue light-emitting device B). In this embodiment, by stacking multiple light-emitting devices and changing the arrangement of the different light-emitting devices within the package, the color shift problem caused by obstruction by light-emitting devices of other colors when viewing the display screen from a wide viewing angle is avoided.

[0068] Figure 9 A schematic diagram of the distribution of bonding electrodes in a display panel provided by an embodiment of the present invention, with reference to Figure 9 Optionally, the display panel includes a substrate 20, each pixel circuit is provided on the substrate 20, and a plurality of cathode bonding electrodes 24 and a plurality of anode bonding electrodes are provided on the substrate 20;

[0069] The cathodes of the light-emitting devices in the same pixel unit are connected to the same cathode bonding electrode 24, and the anodes of different light-emitting devices in the same pixel unit are connected to different anode bonding electrodes. In other embodiments, the anodes of the light-emitting devices in the same pixel unit are connected to the same anode bonding electrode, and the cathodes of different light-emitting devices in the same pixel unit are connected to different cathode bonding electrodes.

[0070] For example, a package containing three light-emitting devices in a pixel unit is connected to one cathode-bonded electrode and three anode-bonded electrodes. The three anode-bonded electrodes are respectively a first anode-bonded electrode 25-1, a second anode-bonded electrode 25-2, and a third anode-bonded electrode 25-3. The cathodes of the first-color light-emitting device 21, the second-color light-emitting device 22, and the third-color light-emitting device 23 are all connected to the same cathode-bonded electrode 24. The anode of the first-color light-emitting device 21 is connected to the corresponding first anode-bonded electrode 25-1, the anode of the second-color light-emitting device 22 is connected to the corresponding second anode-bonded electrode 25-2, and the anode of the third-color light-emitting device 23 is connected to the corresponding third anode-bonded electrode 25-3. The cathode-bonded electrode 24 and the three anode-bonded electrodes included in the package are arranged in an array of two rows and two columns. The area enclosed by the cathode-bonded electrode 24 and the three anode-bonded electrodes is the light-emitting region LR of the package.

[0071] Figure 10 A schematic diagram of a display panel provided by an embodiment of the present invention, referring to Figure 9 and Figure 10 The display panel includes metal wiring, such as a first power voltage line VDD, a second power voltage line Vss, a scan line Vscan, a data line Vdata-R connected to the first color light emitting device 21, a data line Vdata-G connected to the second color light emitting device 22, and a data line Vdata-B connected to the third color light emitting device 23. The metal wiring is arranged at intervals. In the existing solution, each light emitting device is connected to a cathode bonding electrode and an anode bonding electrode, and different light emitting devices in the same package are connected to different cathode bonding electrodes and different anode bonding electrodes, that is, in the existing technology, one package corresponds to 6 bonding electrodes. In this embodiment, Figure 9 and Figure 10 As shown, one package body corresponds to four bonding electrodes, which reduces the number of bonding electrodes, thereby reducing the area of ​​the opaque region and improving the transmittance of the display panel.

[0072] Figure 11 A schematic diagram of another display panel provided by an embodiment of the present invention, referring to Figure 11 Optionally, the data lines (including the data line Vdata-R connected to the first color light-emitting device, the data line Vdata-G connected to the second color light-emitting device, and the data line Vdata-B connected to the third color light-emitting device), the scan line Vscan, the first power supply voltage line VDD, and the second power supply voltage line Vss are all transparent metal traces to further improve the transmittance of the display panel. Optionally, the cathode and anode of each light-emitting device are transparent electrodes, such as ITO, and / or each cathode-bonded electrode and each anode-bonded electrode are transparent electrodes to further improve the transmittance of the display panel.

[0073] An embodiment of the present invention further provides a micro LED display device, comprising the display panel described in any of the above embodiments, and having the same beneficial effects as the display panel, which will not be described in detail here.

[0074] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0075] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: A plurality of pixel units, each pixel unit comprising a plurality of light-emitting devices and a pixel circuit correspondingly connected to each of the light-emitting devices; The pixel circuit includes at least two transistors, and vertical projections of the at least two transistors in the thickness direction of the display panel at least partially overlap.

2. The display panel according to claim 1, wherein: Vertical projections of at least two of the transistors in the thickness direction of the display panel completely overlap.

3. The display panel according to claim 1, wherein: The at least two transistors in the pixel circuit include: a driving transistor and a data writing transistor, wherein the data writing transistor is connected to a scan line, a data line and the driving transistor respectively; The driving transistor is further connected to a first power supply voltage line and an anode of the light emitting device; and a cathode of the light emitting device is connected to a second power supply voltage line.

4. The display panel according to claim 3, wherein: The display panel includes a first metal layer, a first dielectric layer, a first active layer, a second metal layer, a planarization layer, a third metal layer, a second dielectric layer, a second active layer and a fourth metal layer stacked in sequence on a substrate of the display panel; The source of the data writing transistor is connected to the data line, the drain of the data writing transistor is connected to the gate of the driving transistor, the gate of the data writing transistor is connected to the scan line, the source of the driving transistor is connected to the first power supply voltage line, and the drain of the driving transistor is connected to the anode of the light emitting device; The first active layer includes a channel region, a source region, and a drain region of the data write transistor; the gate of the data write transistor is formed in the first metal layer and is arranged corresponding to the channel region of the data write transistor; the source of the data write transistor is formed in the second metal layer and is connected to the source region of the data write transistor; the drain of the data write transistor is formed in the second metal layer and is connected to the drain region of the data write transistor; The second active layer includes a channel region, a source region, and a drain region of the driving transistor; the gate of the driving transistor is formed in the third metal layer and is arranged corresponding to the channel region of the driving transistor; the source of the driving transistor is formed in the fourth metal layer and is connected to the source region of the driving transistor; the drain of the driving transistor is formed in the fourth metal layer and is connected to the drain region of the driving transistor; The drain of the data writing transistor and the gate of the driving transistor in the same pixel circuit are connected through a via.

5. The display panel according to claim 4, wherein: The scan line is located in the first metal layer, the data line is located in the second metal layer, the first power supply voltage line is located in the fourth metal layer, and the second power supply voltage line is located in the fourth metal layer.

6. The display panel according to claim 3, wherein: The data line, the scan line, the first power supply voltage line, and the second power supply voltage line are all transparent metal wirings.

7. The display panel according to any one of claims 1 to 6, characterized in that: The plurality of light emitting devices in the same pixel unit include: a first color light emitting device, a second color light emitting device and a third color light emitting device; The first color light emitting device, the second color light emitting device and the third color light emitting device in the same pixel unit are stacked.

8. The display panel according to claim 7, wherein: The display panel includes a substrate, each of the pixel circuits is arranged on the substrate, and a plurality of cathode bonding electrodes and a plurality of anode bonding electrodes are arranged on the substrate; The cathodes of the light-emitting devices in the same pixel unit are connected to the same cathode bonding electrode, and the anodes of different light-emitting devices in the same pixel unit are connected to different anode bonding electrodes; or The anodes of the light-emitting devices in the same pixel unit are connected to the same anode bonding electrode, and the cathodes of different light-emitting devices in the same pixel unit are connected to different cathode bonding electrodes.

9. The display panel according to claim 8, wherein: The cathode and anode of each of the light-emitting devices are transparent electrodes; and / or, Each of the cathode-bonded electrodes and each of the anode-bonded electrodes are transparent electrodes.

10. The display panel according to claim 1, wherein The vertical projections of the light emitting device and the pixel circuit in the thickness direction of the display panel at least partially overlap.

11. A micro LED display device, characterized in that: include: The display panel according to any one of claims 1 to 10.

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