Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. The display panel comprises a plurality of sub-pixels, the sub-pixels comprising a first color sub-pixel, the first color sub-pixel comprising M first lines connected in parallel, at least one first sub-line being included in the M first lines, the first sub-line comprising N LEDs connected in series, M and N each being an integer not less than 2. The present application can improve the brightness of the first color sub-pixel without increasing power consumption, thereby compensating for the problem of low brightness caused by low light-emitting efficiency of the LEDs in the first color sub-pixel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] Micro Light-Emitting Diode (Micro-LED) as a new technology, its size is greatly reduced from light-emitting diode, with independently light-emitting red, blue, green micro light-emitting diode array arrangement to form a display array can be used in the field of display technology. Micro light-emitting diode has self-luminous display characteristics, compared with self-luminous display organic light-emitting diode (Organic Light Emitting Diode, OLED) high efficiency, long life, material is not easy to be affected by the environment and relatively stable. Micro light-emitting diode has become the focus of display field research. However, at present, among the three kinds of chips of micro light-emitting diode, due to the limitation of chip manufacturing materials, some chips have the problem of low light-emitting efficiency, and the chip with low light-emitting efficiency leads to low brightness of sub-pixel. SUMMARY

[0003] The embodiments of the present application provide a display panel and a display device to solve the technical problem of improving the light-emitting brightness of sub-pixel without increasing power consumption.

[0004] In a first aspect, the embodiments of the present application provide a display panel, the display panel comprising a plurality of sub-pixels, the sub-pixel comprising a first color sub-pixel, the first color sub-pixel comprising M first lines connected in parallel, the M first lines comprising at least one first sub-line, the first sub-line comprising N LEDs connected in series, wherein M and N are positive integers, M is greater than or equal to 2, and N is greater than or equal to 2.

[0005] In a second aspect, based on the same inventive concept, the embodiments of the present application also provide a display device comprising the display panel provided by any of the embodiments of the present application.

[0006] DD225478I-IMP

[0007] The display panel and the display device provided by the embodiment of the present application have the following beneficial effects: the first color sub-pixel comprises at least two first lines connected in parallel, the first line comprises at least one first sub-line, and the first sub-line comprises at least two LEDs connected in series. The first color sub-pixel adopts the design of taking the parallel line as a redundant line, taking one first sub-line as a main line, and taking the parallel line outside the main line as a redundant line. The at least two LEDs in the first sub-line are connected in series. Compared with the line comprising only one LED, the overall luminous brightness of the first sub-line is obviously improved when the same size of driving current is provided, so that the brightness of the first color sub-pixel can be improved without increasing power consumption, thereby compensating for the problem of low brightness caused by the low light-emitting efficiency of the LED itself in the first color sub-pixel. In addition, the first color sub-pixel comprises a redundant line arranged in parallel with the first sub-line. When the first sub-line has a light-emitting defect, the LED bound in the redundant line normally emits light, so that the light emission of the first color sub-pixel can be ensured, thereby ensuring the normal use of the display panel. The first color sub-pixel adopts the design of taking the parallel line as a redundant line, so that the redundant line can repair the LED transfer defect during manufacturing, reduce the generation of waste boards, and save costs. Moreover, the redundant line bound with the LED can compensate for the LED damage defect occurring in use, thereby prolonging the service life of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0009] Figure 1 A partial schematic view of a display panel provided by the embodiment of the present application is shown in the figure.

[0010] Figure 2 A partial schematic view of another display panel provided by the embodiment of the present application is shown in the figure.

[0011] Figure 3 A partial schematic view of another display panel provided by the embodiment of the present application is shown in the figure.

[0012] Figure 4 A partial schematic view of another display panel provided by the embodiment of the present application is shown in the figure.

[0013] Figure 5 A partial schematic view of another display panel provided by the embodiment of the present application is shown in the figure. Figure 1 A cross-sectional view at the position of the tangent line A-A' in the figure.

[0014] Figure 6 A partial schematic view of another display panel provided by the embodiment of the present application is shown in the figure. Figure 1Another cross-sectional schematic view at the location of the centerline A-A';

[0015] DD225478I-IMP

[0016] Figure 7 Another partial schematic view of a display panel provided for embodiments of the present application;

[0017] Figure 8 Another partial schematic view of a display panel provided for embodiments of the present application; Figure 7 Another cross-sectional schematic view at the location of the centerline B-B';

[0018] Figure 9 Another partial schematic view of a display panel provided for embodiments of the present application;

[0019] Figure 10 Another partial schematic view of a display panel provided for embodiments of the present application;

[0020] Figure 11 Another partial schematic view of a display panel provided for embodiments of the present application;

[0021] Figure 12 Another partial schematic view of a display panel provided for embodiments of the present application;

[0022] Figure 13 Another partial schematic view of a display panel provided for embodiments of the present application;

[0023] Figure 14 Another partial schematic view of a display panel provided for embodiments of the present application;

[0024] Figure 15 Another partial schematic view of a display panel provided for embodiments of the present application;

[0025] Figure 16 Another partial schematic view of a display panel provided for embodiments of the present application;

[0026] Figure 17 Another partial schematic view of a display panel provided for embodiments of the present application;

[0027] Figure 18 Another partial schematic view of a display panel provided for embodiments of the present application;

[0028] Figure 19 Another partial schematic view of a display panel provided for embodiments of the present application;

[0029] Figure 20 Another partial schematic view of a display panel provided for embodiments of the present application; DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0032] For chips with low luminous efficiency, increasing the drive current can increase their brightness, but this inevitably leads to increased power consumption. This approach, sacrificing power consumption, is exemplified by the DD225478I-IMP.

[0033] The method of achieving high luminous brightness is not recommended. This invention provides a display panel in which a series-connected line is provided in the sub-pixel, and at least two LEDs (Light Emitting Diodes) are connected in series in the series line. This can increase the overall luminous brightness of the series line without increasing the driving current, thereby increasing the luminous brightness of the sub-pixel without increasing power consumption.

[0034] Figure 1 This is a partial schematic diagram of a display panel provided in an embodiment of the present invention. The display panel includes multiple sub-pixels, such as... Figure 1 As shown, sub-pixels sp include a first-color sub-pixel sp1, a second-color sub-pixel sp2, and a third-color sub-pixel sp3, each with a different color. Each sub-pixel sp includes a first electrode 1, a second electrode 2, and at least one LED 3. The first electrodes 1 of each sub-pixel sp are electrically connected to each other, while the second electrodes 2 of each sub-pixel sp are isolated from each other. Optionally, the LED 3 is a Micro-LED. Figure 1 In the display panel, LEDs in different color sub-pixels sp are represented by a unified reference numeral 3, but LEDs 3 in different color sub-pixels sp use different filling patterns. LED 3 in the first color sub-pixel sp1 emits light of the first color, LED 3 in the second color sub-pixel sp2 emits light of the second color, and LED 3 in the third color sub-pixel sp3 emits light of the third color. The display panel also includes a first power line 4, which is used to transmit a first power signal. The first electrode 1 is electrically connected to the first power line 4. One of the first electrode 1 and the second electrode 2 is the anode and the other is the cathode.

[0035] The first color sub-pixel sp1 includes M first lines 10 connected in parallel, and the M first lines 10 include at least one first sub-line 11, and the first sub-line 11 includes N LEDs 3 connected in series, where M and N are positive integers, M≥2, and N≥2. The LEDs 3 connected in series in the first sub-line 11 are electrically connected through the connecting electrode 5.

[0036] Figure 1 Taking M=2 and N=2 as an example, the M first lines 10 include one first sub-line 11. Figure 1 In the middle, the lines in the sub-pixel sp are schematically shown by dashed lines with arrows. It can be seen that the second color sub-pixel sp2 includes two lines connected in parallel, and each line includes one LED 3. The third color sub-pixel sp3 also includes two lines connected in parallel, and each line includes one LED 3.

[0037] In the embodiments of the present application, the "line" in the sub-pixel sp includes a line capable of forming a path, and the LED 3 is arranged in the line capable of forming a path, such as Figure 1 The first color sub-pixel sp1 is schematically shown in FIG. 22.

[0038] The first sub-line 11 includes two LEDs 3, and the formed path is anode→LED 3→LED 3→cathode. The line in the second color sub-pixel sp2 is anode→LED 3→cathode.

[0039] In some embodiments, the "line" in the sub-pixel sp can also include a disconnected line, and the disconnected line is a redundant position arranged in the sub-pixel sp. Figure 2 Another partial view of a display panel provided by the embodiments of the present application is shown in FIG. 23. Figure 2 As shown in FIG. 23, the second color sub-pixel sp2 includes two lines connected in parallel. One of the lines is anode→LED 3→cathode, and the other line does not bind the LED and only includes the first electrode 1 and the second electrode 2 arranged correspondingly, so the line without binding the LED is a redundant position.

[0040] The second color sub-pixel sp2 in the display panel can be manufactured by the following process. When manufacturing the display panel, a position capable of forming two parallel lines is preset at the position of the second color sub-pixel sp2. First, the plurality of LEDs 3 are transferred to the corresponding preset positions on the display panel. Each second color sub-pixel sp2 has a corresponding preset position, that is, the second color sub-pixels sp2 in the entire display area of the display panel are manufactured together. After transferring the LEDs 3 once, a line is formed in each second color sub-pixel sp2. After transferring the LEDs 3, the light emission of the second color sub-pixels sp2 in the display panel is detected. When it is detected that all the second color sub-pixels sp2 can normally emit light, the second transfer is not performed, and the second color sub-pixel sp2 has a redundant position 20'. The redundant position 20' is not bound with an LED, and the first electrode 1 and the second electrode 2 are arranged at the redundant position 20', and the redundant position 20' forms a disconnected line.

[0041] Figure 2 The third color sub-pixel sp3 includes two parallel lines, and each line includes one LED 3. When manufacturing the display panel, a position capable of forming two parallel lines is preset at the position of the third color sub-pixel sp3.

[0042] In some embodiments, the two LEDs 3 in the third color sub-pixel sp3 are manufactured in two transfer processes respectively. For example, in the first transfer process, one LED 3 is first transferred to the corresponding position of the third color sub-pixel sp3, and then the light emission of the third color sub-pixel sp3 is detected. When it is detected that some third color sub-pixels sp3 have defects and cannot normally emit light, the second transfer process is performed to transfer the second LED 3 to the corresponding position of the third color sub-pixel sp3.

[0043] DD225478I-IMP

[0044] In this way, the third color sub-pixel sp3 includes two parallel LEDs 3. The defects of some third color sub-pixels sp3 after the first transfer process can be caused by defects of the transferred LEDs themselves or by defects caused by the transfer process. The second transfer process is used to repair the defective pixels in this embodiment, so as to ensure that all the third color sub-pixels sp3 can normally emit light. When both the two LEDs 3 in the third color sub-pixel sp3 can normally emit light, the line in which one of the two LEDs 3 is located can be considered as a redundant line.

[0045] In other embodiments, the two LEDs 3 in the third color sub-pixel sp3 are fabricated in a single transfer process. In this single transfer process, two LEDs 3 are transferred for each third color sub-pixel sp3, forming two LEDs 3 connected in parallel. If one of the two parallel LEDs 3 has a transfer defect, the other LED 3 ensures the sub-pixel can still emit light normally. Similarly, if one of the two parallel LEDs 3 fails during use, the other LED 3 ensures the sub-pixel can still emit light normally. In other words, the third color sub-pixel sp3 includes two parallel lines, one of which can be considered a redundant line.

[0046] by Figure 2 Taking the second color subpixel sp2 as an example, the scheme including the redundant position 20′ is explained. Figure 2 Taking the third color sub-pixel sp3 as an example, the scheme including redundant lines is described. In some embodiments of the present invention, such as Figure 1 As shown, the first color sub-pixel sp1 includes redundant lines, and the second sub-line 12 is connected in parallel with the first sub-line 11. The second sub-line 12 includes LED3, and the second sub-line 12 is the redundant line in the first color sub-pixel sp1. In some other embodiments, the first color sub-pixel sp1 includes redundant positions. For example, if LED3 is not bound in the second sub-line 12, a redundant position is formed, which will not be shown in the accompanying drawings.

[0047] The first color sub-pixel sp1 in the display panel provided in this embodiment of the invention includes at least two first lines 10 connected in parallel. Each first line 10 includes at least one first sub-line 11, and each first sub-line 11 includes at least two LEDs 3 connected in series. The first color sub-pixel sp1 uses a parallel line design for redundancy, with one first sub-line 11 as the main line and the parallel lines other than the main line as redundant lines. Since at least two LEDs 3 are connected in series in the first sub-line 11, compared to a line containing only one LED 3, when providing the same driving current, the overall output of the first sub-line 11 is significantly higher.

[0048] The brightness is significantly improved, thereby increasing the brightness of the first color sub-pixel sp1 without increasing power consumption, thus compensating for the low brightness caused by the low luminous efficiency of the LED3 in the first color sub-pixel sp1. Furthermore, the first color sub-pixel sp1 includes a redundant circuit connected in parallel with the first sub-line 11. When the first sub-line 11 has a light-emitting defect, the LED3 bound to the redundant circuit emits light normally, ensuring the light emission of the first color sub-pixel sp1 and thus guaranteeing the normal operation of the display panel. The use of a parallel circuit design for the redundant circuit in the first color sub-pixel sp1 allows for the repair of LED3 transfer defects during manufacturing, reducing waste boards and saving costs. Moreover, the redundant circuit bound to the LED3 can compensate for LED3 damage defects that occur during use, thereby extending the lifespan of the display panel.

[0049] Figure 1 The first color sub-pixel sp1 is illustrated by including a first sub-line 11. In another embodiment, M=2, and both first lines 10 are first sub-lines 11. Figure 3 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention, such as... Figure 3 As shown, the first color sub-pixel sp1 includes two first lines 10 connected in parallel, and both first lines 10 are first sub-lines 11. The first sub-lines 11 include two LEDs 3 connected in series.

[0050] In some implementations, the first color sub-pixel sp1 is a red sub-pixel, and the second color sub-pixel sp2 and the third color sub-pixel sp3 are respectively a blue sub-pixel and a green sub-pixel.

[0051] In some implementations... Figure 4 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention. Figure 4 This illustrates the location of a pixel unit P, as shown below. Figure 4 As shown, a first color sub-pixel sp1, a second color sub-pixel sp2, and a third color sub-pixel sp3 constitute a pixel unit P. Pixel unit P includes a light-transmitting area 30 and a non-light-transmitting area (not shown in Figure 4). Among the first color sub-pixel sp1, the second color sub-pixel sp2, and the third color sub-pixel sp3, LED3 is located in the non-light-transmitting area. In this embodiment, the three color sub-pixels sp in pixel unit P are concentrated, which can leave a large area of ​​light-transmitting area 30 at the location of pixel unit P, so that the location of pixel unit P has a large light transmittance. Therefore, the display panel provided by this embodiment can be used as a transparent display panel.

[0052] In some implementations, such as Figure 4As shown, in the first color sub-pixel sp1, among the M first lines 10, there is at least one second sub-line 12, and the second sub-line 12 includes only one LED3. This is in contrast to DD225478I-IMP.

[0053] Regarding the first sub-line 11, the second sub-line 12 can be considered a redundant line in the first color sub-pixel sp1. When there is a light-emitting defect in the first sub-line 11 in some first color sub-pixels sp1, the LED3 in the second sub-line 12 emits light to ensure the normal light emission of the first color sub-pixel sp1. By setting the second sub-line 12 to include only one LED3, the area occupied by the second sub-line 12 is smaller. The first color sub-pixel sp1 achieves a redundant line design, which also helps to reduce the overall area occupied by the first color sub-pixel sp1. This ensures that a larger light-transmitting area 30 is reserved in the pixel unit P. When applied to transparent displays, this can improve the transparency of the transparent display.

[0054] In some implementations, the difference in the number of LEDs (3) between any two of the M first lines 10 is less than or equal to 1. Figure 1 For example, the first color sub-pixel sp1 includes two first lines 10, one of which includes two LEDs 3, and the other first line 10 includes one LED 3. Figure 3 For example, the first color sub-pixel sp1 includes two first lines 10, and each of the two first lines 10 includes two LEDs 3. When there is a first line 10 with a light-emitting defect in the first color sub-pixel sp1, then the first color sub-pixel sp1 is the first color sub-pixel sp1 that needs to be repaired. When there is no first line 10 with a light-emitting defect in the first color sub-pixel sp1, then the first color sub-pixel sp1 that does not need to be repaired is the first color sub-pixel sp1 that does not need to be repaired. When M first lines 10 in the first color sub-pixel sp1 all include LEDs 3, the actual light emission of the repaired first color sub-pixel sp1 and the first color sub-pixel sp1 that does not need to be repaired in the display panel is different. Taking M=2 as an example, in the repaired first color sub-pixel sp1, only one first line 10 emits light normally, while in the first color sub-pixel sp1 that does not need to be repaired, both first lines 10 emit light normally. In this embodiment of the invention, the difference in the number of LEDs 3 contained in any two of the M first lines 10 is less than or equal to 1, which can avoid the excessive brightness difference between the repaired first color sub-pixel sp1 and the unrepaired first color sub-pixel sp1 in the display panel, thus affecting the uniformity of the display.

[0055] In some embodiments, two of the M first lines 10 include LEDs 3 that are flip-chip LEDs, and at least one of the first lines 10 including flip-chip LEDs is a first sub-line 11. A flip-chip LED is one in which the anode and cathode electrodes are located on the same side of the light-emitting layer. Taking M=2 as an example... Figure 1 As shown, the first color sub-pixel sp1 includes two first lines 10, wherein DD225478I-IMP

[0056] In the first sub-circuit 11, LED3 is a flip-chip LED, and in the second sub-circuit 12, LED3 is also a flip-chip LED. The first sub-circuit 11 and at least one first circuit 10 connected in parallel with it are made of the same type of LED. The manufacturing process of LED chips of the same type is uniform and the cost is low. Furthermore, the same transfer process and transfer fixture can be used when transferring LEDs, which helps to reduce the manufacturing cost of the display panel.

[0057] In some implementations, all LEDs in the first color sub-pixel sp1 are of the same type, such as flip-chip LEDs. Therefore, all LEDs in the first color sub-pixel sp1 are manufactured using the same process, and can be transferred using the same transfer process and fixture, which can reduce the manufacturing cost of the display panel.

[0058] In some implementations... Figure 5 for Figure 1 A schematic diagram of a cross-section at the location of the tangent AA′. (See diagram below.) Figure 5 As shown, the display panel includes a substrate 00 and a pixel circuit 01 located on one side of the substrate 00. The film layer where the second electrode 2 is located is located on the side of the pixel circuit 01 away from the substrate 00. The LED 3 in the sub-pixel sp is located on the side of the film layer where the second electrode 2 is located away from the pixel circuit 01. The pixel circuit 01 is electrically connected to the second electrode 2 through a first through-hole V1 that penetrates the insulating layer. Figure 5Only one transistor and one storage capacitor 011 are shown in the pixel circuit 01. The specific structure of the pixel circuit 01 is not limited; it can be any existing technology. In the display panel, the first power line 4, the first electrode 1, and the second electrode 2 are located on the same layer. By fabricating the first electrode 1 and the second electrode 2 on the same layer, when using flip-chip LEDs, bonding can be achieved after transferring the flip-chip LEDs to positions corresponding to the first electrode 1 and the second electrode 2 (e.g., using eutectic layer bonding or silver paste bonding). This eliminates the need for electrode fabrication after LED transfer, simplifying the process and avoiding adverse effects of patterning processes after LED transfer on already fabricated circuitry. In this embodiment, the second electrodes 2 of each sub-pixel sp are isolated from each other, and the first electrode 1 of each sub-pixel sp is electrically connected to the first power line 4. The second electrode 2 occupies a small area in the film layer where the first power line 4 is located, leaving ample space for fabricating the first power line 4. This helps reduce the resistance on the first power line 4, thereby reducing the voltage drop during the transmission of the first power signal and improving in-plane uniformity.

[0059] like Figure 5 As shown, electrode 5 is connected to the first power line 4, the first electrode 1, and the second electrode 2 at DD225478I-IMP.

[0060] Same layer. Connecting electrode 5 is connected between two LEDs 3 connected in series. Connecting electrode 5 occupies a small area and does not affect the wiring space of the first power line 4.

[0061] like Figure 5 As shown, a buffer layer 04 is also disposed between the substrate 00 and the pixel circuit 01. The material of the buffer layer 04 includes inorganic materials. The buffer layer 04 is used to prevent metal ions from diffusing into the active layer of the transistor in the pixel circuit, reduce the defect center of the transistor, and reduce the generation of leakage current.

[0062] like Figure 5 As shown, pixel circuit 01 is electrically connected to second electrode 2 through first via V1 penetrating the insulating layer. LED3, which is directly electrically connected to second electrode 2 in first color sub-pixel sp1, does not overlap with first via V1. In the display panel, the insulating layer located on the side of second electrode 2 closest to substrate 00 and in direct contact with second electrode 2 is the first planarization layer 02. The first planarization layer 02 is made of organic material, and its thickness is relatively thicker than that of insulating layers made of inorganic materials. The first planarization layer 02 provides a relatively flat surface for the structure fabricated above it. Because the first planarization layer 02 is relatively thick, the second electrode 2 at the location of first via V1 may have some undulations. By ensuring that LED3 does not overlap with first via V1, the transfer yield of LED3 to uneven locations can be avoided.

[0063] In some embodiments, Figure 6 For Figure 1 A-A' position of the tangent in another cross-sectional schematic diagram. As Figure 6 shown, the display panel also includes a transition metal 03, the pixel circuit 01 is connected to the transition metal 03 through the second via V2 penetrating the insulating layer, and the transition metal 03 is connected to the second electrode 2 through the first via V1 penetrating the insulating layer, so as to realize the connection of the pixel circuit 01 to the second electrode 2. In this embodiment, the second power line can be made in the same layer as the transition metal 03, the second power line transmits the second power signal, and the power end of the pixel circuit 01 is connected to the second power line. One of the first power line 4 and the second power line provides a positive power voltage, and the other provides a negative power voltage.

[0064] In some embodiments, Figure 7 For another display panel provided by an embodiment of the application, as Figure 7 shown, the first color sub-pixel sp1 includes at least one vertical structure LED 6. The vertical structure LED 6 is that the anode electrode and the cathode electrode of the LED are respectively located on the two sides of the light-emitting layer. Figure 7 The first sub-circuit 11 includes two flip structure LEDs 3 connected in series, and the other first circuit 10 includes one vertical structure LED 6. Alternatively, the first sub-circuit 11 can also include a vertical DD225478I-IMP

[0065] structure LED, which will be illustrated and described in the related embodiments described below. Compared with the flip structure LED, the vertical structure LED occupies a relatively small area size. By setting the first color sub-pixel sp1 to include at least one vertical structure LED, the advantage of the small area size of the vertical structure LED can be used to compensate for the influence of the setting of the first sub-circuit 11 on the overall area occupied by the first color sub-pixel sp1, thereby reducing the influence on the light transmission area in the display panel. In transparent display applications, the overall light transmission rate can be ensured.

[0066] In some embodiments, the display panel includes a connection line directly connected to the vertical structure LED, and the connection line is used to electrically connect the vertical structure LED and the corresponding electrode. Figure 8 For Figure 7 A cross-sectional schematic diagram at the position of the tangent B-B'. As Figure 8As shown, the side of the vertical structure LED 6 close to the substrate 00 is electrically connected to the second electrode 2, and the side of the vertical structure LED 6 away from the substrate 00 is connected to the first power line 4 through the connecting line 7. The connecting line 7 is located at the side of the vertical structure LED 6 away from the substrate 00, and the connecting line 7 is electrically connected to the first power line 4 through the third via hole V3. The material of the connecting line 7 includes a transparent material, such as indium tin oxide. In this embodiment, the connecting line 7 includes a transparent material, which can improve the light transmittance of the connecting line 7, thereby further improving the light transmittance of the display panel as a whole, and can improve the transparency of the transparent display when applied to the transparent display.

[0067] By Figure 8 It can also be seen that the LED directly connected to the second electrode 2 does not overlap the first via hole V1, and such arrangement can ensure that the LED is transferred to a relatively flat substrate, thereby improving the transfer yield.

[0068] In some embodiments, as Figure 4 shown, one first color sub-pixel sp1, one second color sub-pixel sp2, and one third color sub-pixel sp3 constitute a pixel unit P. In the pixel unit P, the second electrodes 2 of the three color sub-pixels sp are arranged along the first direction x. That is, the three second electrodes 2 in the same pixel unit P are arranged along the same direction. In the display panel, the pixel circuit 01 needs to be connected to the second electrode 2 to provide voltage for the sub-pixel sp, and the pixel circuit 01 is electrically connected to the second electrode 2 through the first via hole V1 penetrating the insulating layer. In the embodiment of the present application, the three second electrodes 2 in the pixel unit P are arranged along the same direction, so that the connection mode (such as the relative position between the first via hole V1 and the pixel circuit 01) of each pixel circuit 01 and the second electrode 2 in the corresponding sub-pixel sp does not differ too much, which is convenient for the layout design of the pixel circuit 01 in the display panel, and a plurality of pixel circuits 01 can be arranged.

[0069] The three color sub-pixels sp in the same pixel unit P are arranged along the same direction, which is convenient for the layout design of the pixel circuit 01 in the display panel, and a plurality of pixel circuits 01 can be arranged.

[0070] As Figure 4 shown, along the first direction x, the second electrode 2 in the first color sub-pixel sp1 and the second electrode 2 in the second color sub-pixel sp2 at least partially overlap, and the second electrode 2 in the second color sub-pixel and the second electrode 2 in the third color sub-pixel sp3 are aligned. The three second electrodes 2 corresponding to the three color sub-pixels sp in the same pixel unit P are arranged on substantially the same line, so that the relative positions of the second electrodes 2 in the sub-pixels sp and the corresponding pixel circuits 01 are substantially the same, which can facilitate the layout design of each pixel circuit 01, thereby reducing the process difficulty.

[0071] Figure 4In the embodiment, it is shown that the second electrodes 2 in the first color sub-pixel sp1 and the second color sub-pixel sp2 are partially misaligned along the first direction x.

[0072] In some embodiments, Figure 9 Another partial schematic view of a display panel is provided in some embodiments of the present application, Figure 9 A position of a pixel unit P is shown in some embodiments, as Figure 9 As shown, the second electrodes 2 of the first color sub-pixel sp1, the second color sub-pixel sp2 and the third color sub-pixel sp3 are substantially aligned along the first direction x. In this embodiment, the second electrodes 2 of the color sub-pixels sp can be arranged at substantially the same position relative to the pixel circuit 01, and the layout of the pixel circuit 01 can be designed in the same way, which is simple in process.

[0073] In some embodiments, as Figure 4 As shown, the second color sub-pixel sp2 includes at least two second lines 20 connected in parallel, and each of the second lines 20 includes one LED 3. In the second color sub-pixel sp2, the second lines 20 are arranged along the first direction x. The third color sub-pixel sp3 includes at least two third lines 40 connected in parallel, and each of the third lines 40 includes one LED 3. In the third color sub-pixel sp3, the third lines 40 are arranged along the first direction x. In this embodiment, the second lines 20 and the third lines 40 are arranged along the first direction x, and combined with the design that the second electrodes 2 of the color sub-pixels sp are arranged along the first direction x, the second electrodes 2 of the color sub-pixels sp can be arranged at substantially the same position relative to the pixel circuit 01, and the layout of the pixel circuit 01 can be designed in the same way, which is simple in process.

[0074] Figure 4 In some embodiments, the second color sub-pixel sp2 includes two second lines 20, and the third color sub-pixel sp3 includes two third lines 40. In other embodiments, the second color sub-pixel sp2 includes more than two second lines 20, and / or the third color sub-pixel sp3 includes more than two third lines 40.

[0075] In some embodiments, the second color sub-pixel sp2 includes two second lines 20, and the third color sub-pixel sp3 includes two third lines 40. In other embodiments, the second color sub-pixel sp2 includes more than two second lines 20, and / or the third color sub-pixel sp3 includes more than two third lines 40.

[0076] The first color sub-pixel sp1 in the embodiment of the present application includes M first lines 10, and one LED 3 in each of the M first lines 10 is electrically connected with the second electrode 2, that is, there are M LEDs electrically connected with the second electrode 2 in the first color sub-pixel sp1, so that the M first lines 10 can be connected in parallel. Optionally, when the LED 3 connected with the second electrode 2 is a flip structure LED, the LED 3 and the second electrode 2 overlap and are electrically connected. When the LED 3 connected with the second electrode 2 is a vertical structure LED, the LED 3 and the second electrode 2 overlap and are electrically connected, or the LED 3 and the second electrode 2 do not overlap but are electrically connected through a connecting line. As shown in Figure 4 Or Figure 9 As shown in the first color sub-pixel sp1, the M LEDs 3 electrically connected with the second electrode 2 include a first LED 3-1; the first color sub-pixel sp1 further includes a second LED 3-2, and the first LED 3-1 and the second LED 3-2 are adjacent in the first direction x. The arrangement direction of the first LED 3-1 and the second LED 3-2 is the same as the arrangement direction of the three sub-pixels sp in the pixel unit P, which is beneficial to compactly arrange the LEDs 3 in the first color sub-pixel sp1, and further relatively centrally arrange the three sub-pixels sp in the pixel unit P, so as to leave a larger light transmission area 30 in the area occupied by the pixel unit P. In addition, when the first LED 3-1 and the second LED 3-2 normally emit light to contribute to the light emission of the first color sub-pixel sp1, the color mixing of the first color sub-pixel sp1 and other sub-pixels sp can be more uniform.

[0077] As shown in Figure 4 Or Figure 9 As shown in the first color sub-pixel sp1, the M LEDs 3 electrically connected with the second electrode 2 include a first LED 3-1; the first color sub-pixel sp1 further includes a second LED 3-2, and the first LED 3-1 and the second LED 3-2 are adjacent in the first direction x. The arrangement direction of the first LED 3-1 and the second LED 3-2 is the same as the arrangement direction of the three sub-pixels sp in the pixel unit P, which is beneficial to compactly arrange the LEDs 3 in the first color sub-pixel sp1, and further relatively centrally arrange the three sub-pixels sp in the pixel unit P, so as to leave a larger light transmission area 30 in the area occupied by the pixel unit P. In addition, when the first LED 3-1 and the second LED 3-2 normally emit light to contribute to the light emission of the first color sub-pixel sp1, the color mixing of the first color sub-pixel sp1 and other sub-pixels sp can be more uniform.

[0078] In some embodiments, as shown in Figure 4 The first LED 3-1 and the second LED 3-2 are connected in series in a first sub-line 11; the second electrode 2 and the first electrode 1 of the first color sub-pixel sp1 are connected in a first DD225478I-IMP

[0079] The second LED 3-2 is electrically connected with the first electrode 1 in the direction x. Figure 4 The first LED 3-1 and the second LED 3-2 are connected in series through the connecting electrode 5, and the first LED 3-1 and the second LED 3-2 are simultaneously lighted to emit light. The arrangement direction of the first LED 3-1 and the second LED 3-2 is the same as the arrangement direction of the three sub-pixels sp in the pixel unit P, and when the first sub-circuit 11 where the first LED 3-1 and the second LED 3-2 are located normally emits light, the luminous brightness of the first color sub-pixel sp1 can be improved to compensate for the low luminous efficiency of the LED chip itself, and the color mixing of the first color sub-pixel sp1 and other sub-pixels sp can be more uniform.

[0080] As shown in Figure 4 The first color sub-pixel sp1 further includes a third LED 3-3, one end of the third LED 3-3 is electrically connected with the second electrode 2, and the other end of the third LED 3-3 is connected with the same first electrode 1 as the second LED 3-2; the third LED 3-3, the first LED 3-1 and the second LED 3-2 are arranged in a "pin" shape. In this embodiment, the third LED 3-3 is located in a first line 10 alone, and the first line 10 where the third LED 3-3 is located is arranged in parallel with the first sub-circuit 11 where the first LED 3-1 and the second LED 3-2 are located. The first line 10 where the third LED 3-3 is located is a redundant line provided in the first color sub-pixel sp1, and when the first sub-circuit 11 has a light emitting defect, the third LED 3-3 bound in the redundant line normally emits light to ensure the light emission of the first color sub-pixel sp1, thereby ensuring the normal use of the display panel. The redundant line can repair the transfer defect of the LED in the first sub-circuit 11 during production, reduce the generation of waste panels and save costs; and the redundant line where the third LED 3-3 is located can compensate for the LED 3 damage defect occurring in use, thereby prolonging the service life of the display panel. In addition, the three LEDs 3 in the first color sub-pixel sp1 are arranged in a "pin" shape, and the LEDs 3 are relatively compactly arranged, which can leave a larger light transmission area 30 in the occupied area of the pixel unit P, thereby improving the display effect in transparent display.

[0081] Figure 4 In the embodiment, the second electrode 2 of the first color sub-pixel sp1 and the second electrode 2 of another sub-pixel sp are spaced apart by the first electrode 1 of the first color sub-pixel sp1.

[0082] In another embodiment, Figure 10 Another display panel provided by the embodiment of the present application is shown in the partial view. Figure 10As shown, the first LED 3-1 and the second LED 3-2 are connected in series in a first sub-circuit 11, and the other end of the third LED 3-3 and the second LED 3-2 are connected to the same first electrode 1; the third DD225478I-IMPLED 3-3, the first LED 3-1, and the second LED 3-2 are arranged in a "pin" shape. In the pixel unit P, the second electrodes 2 of the first color sub-pixel sp1 and the second electrodes 2 of another sub-pixel sp are arranged adjacent to each other.

[0083] In some embodiments, Figure 11 Another partial schematic diagram of the display panel provided by an embodiment of the present invention is shown in Figure 11 As shown, three second electrodes 2 in the pixel unit P are arranged along the first direction x, the first power line 4 extends along the second direction y, the second direction y intersects with the first direction x, and the first electrode 1 is coupled to the first power line 4. The first LED 3-1 and the second LED 3-2 are connected in series in a first sub-circuit 11. The first LED 3-1 and the second LED 3-2 are adjacent in the first direction x, and the first LED 3-1 is electrically connected to the second electrode 2. One end of the third LED 3-3 is electrically connected to the second electrode 2, and the first circuit 10 where the third LED 3-3 is located only includes one LED 3. Among them, the first electrode 1 of the first color sub-pixel sp1 includes a first sub-electrode 1-1 and a second sub-electrode 1-2. The second LED 3-2 is electrically connected to the first sub-electrode 1-1. The first sub-electrode 1-1 and the second electrode 2 are arranged along the first direction x. The other end of the third LED 3-3 is electrically connected to the second sub-electrode 1-2. A partial line segment in the first power line 4 is multiplexed as the second sub-electrode 1-2. In this embodiment, the first circuit 10 where the third LED 3-3 is located and the first sub-circuit 11 are connected to the first electrodes 1 at different positions, and the placement position of the third LED 3-3 is designed. As Figure 11 It is shown that the third LED 3-3 is only adjacent to the first LED 3-1 in the second direction y, and a partial line segment in the first power line 4 is multiplexed as the second sub-electrode 1-2. Setting the third LED 3-3 to be electrically connected to the second sub-electrode 1-2 can reduce the influence of the third LED 3-3 on the area of the light-transmitting region 30 in the pixel unit P. Moreover, the size of the first sub-electrode 1-1 connected to the second LED 3-2 can also be set relatively small, which is also beneficial to increasing the area of the light-transmitting region 30. The setting method of the first sub-pixel sp1 in this embodiment has a small influence on the area of the light-transmitting region 30, and can ensure a relatively high transparency in the application of transparent display.

[0084] In some other embodiments, the third LED 3-3 is located in a first circuit 1, and the third LED 3-3 is a vertical structure LED. Figure 12 Another partial schematic diagram of the display panel provided by an embodiment of the present invention is shown in Figure 12As shown, one end of the third LED 3-3 is connected to the first electrode 1, and the other end is connected to the second electrode 2. The third LED 3-3 is a vertical structure LED, overlapping and electrically connected to the first power line 4. The other end of the third LED 3-3 is electrically connected to the second electrode 2 via the first connecting line 7-1. Optionally, the first connecting line 7-1 may be made of a transparent material. In this embodiment, setting the third LED 3-3 as a vertical structure LED further reduces its impact on the area of ​​the light-transmitting region 30 within the pixel unit P. Simultaneously, the overlap between the third LED 3-3 and the first power line 4, meaning they are located in the same area, reduces the area of ​​each LED's arrangement, further improving the light transmittance of the pixel unit P.

[0085] In other implementations, such as Figure 7 As shown, the vertical structure LED6 is located in a first line 10. The vertical structure LED6 is the third LED3-3. In this embodiment, the third LED3-3 overlaps with and is electrically connected to the second electrode 2. The other end of the third LED3-3 is electrically connected to the first power line 4 through the connecting line 7.

[0086] In some implementations, such as Figure 9 As shown, the first LED 3-1 and the second LED 3-2 are respectively located in two first lines 10, and the first LED 3-1 and the second LED 3-2 are electrically connected to the second electrode 2. The first LED 3-1 is located in a first sub-line 11, and the first sub-line 11 where the first LED 3-1 is located also includes a fourth LED 3-4, which is arranged along the second direction y with the first LED 3-1. In this embodiment, the first LED 3-1 and the second LED 3-2 are respectively electrically connected to the second electrode 2. When both the second color sub-pixel sp2 and the third color sub-pixel sp3 include parallel lines, the graphic shape of the second electrode 2 in the three color sub-pixels sp is basically the same. Combined with the design that the second electrodes 2 of the three color sub-pixels sp are arranged in the same direction, the relative position of the second electrode 2 of each sub-pixel sp and the corresponding pixel circuit can be set to be basically the same, which facilitates the layout design of the pixel circuit in the display panel and reduces the difficulty of wiring design.

[0087] like Figure 9As shown, the display panel includes a first power line 4 extending along the second direction y and an auxiliary power line 8 extending along the first direction x. A first electrode 1 is coupled to the first power line 4, and at least one end of the auxiliary power line 8 is electrically connected to one of the first power lines 4. The auxiliary power line 8 and the first power line 4 transmit the same voltage signal. The first electrode 1 of the first color sub-pixel sp1 includes a first sub-electrode 1-1 and a second sub-electrode 1-2. The second LED 3-2 is electrically connected to the first sub-electrode 1-1, and a portion of the auxiliary power line 8 is multiplexed as the first sub-electrode 1-1. One end of the fourth LED 3-4 is electrically connected to the second sub-electrode 1-2, and a portion of the first power line 4 is multiplexed as the second electrode 1-2. In this embodiment, two parallel-connected first circuits 10 are connected to the first electrodes 1 at different locations, and the placement position of the fourth LED 3-4 is DD225478I-IMP.

[0088] To carry out design, such as Figure 9 The diagram illustrates that the fourth LED 3-4 and the first LED 3-1 are arranged along the second direction y. By reusing a portion of the first power line 4 as the second sub-electrode 1-2, and electrically connecting the fourth LED 3-4 to the second sub-electrode 1-2, the impact of the fourth LED 3-4 on the area of ​​the light-transmitting region 30 within the pixel unit P can be reduced. Furthermore, the size of the first sub-electrode 1-1 connected to the second LED 3-2 can be set relatively small, which also helps to increase the area of ​​the light-transmitting region 30. In this embodiment, the arrangement of the first sub-pixel sp1 has a smaller impact on the area of ​​the light-transmitting region 30, ensuring high transparency in transparent displays.

[0089] In addition, such as Figure 9 As shown, the second color sub-pixel sp2 has two LEDs 3 connected in parallel. One end of each LED 3 is electrically connected to the second electrode 2, and the other end is electrically connected to the auxiliary power line 8. A portion of the auxiliary power line 8 is reused as the first electrode 1 of the second color sub-pixel sp2. The third color sub-pixel sp3 has the same structure as the second color sub-pixel sp2, and a portion of the auxiliary power line 8 is reused as the first electrode 1 of the third color sub-pixel sp3.

[0090] Figure 9 In this embodiment, the fourth LED 3-4 is shown as a flip-chip LED. In other embodiments, the fourth LED 3-4 is a vertical LED. Figure 13 A partial schematic diagram of another display panel provided in an embodiment of the present invention, as shown below. Figure 13As shown, the fourth LED 3-4 is a vertical structure LED, the fourth LED 3-4 is connected in series with the first LED 3-1 through the connecting electrode 5, the fourth LED 3-4 is connected with the connecting electrode 5 in an overlapping manner, and the fourth LED 3-4 is further connected to the first power supply line 4 through the second connecting line 7-2. Optionally, the material of the second connecting line 7-2 includes a transparent material. In this embodiment, the fourth LED 3-4 is a vertical structure LED, which can further reduce the influence of the fourth LED 3-4 on the area of the light transmission region 30 in the pixel unit P, and improve the light transmission rate of the pixel unit P.

[0091] In some other embodiments, the fourth LED 3-4 is connected in series with the first LED 3-1 through the connecting electrode 5, the fourth LED 3-4 is connected with the first power supply line 4 in an overlapping manner, and the fourth LED 3-4 is further connected with the connecting electrode 5 through a connecting line. In this case, no schematic diagram is shown.

[0092] In some other embodiments, Figure 14 Another partial schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 6. Figure 14 As shown, the first LED 3-1 and the fourth LED 3-4 are connected in series in the first sub-circuit 11, the first LED 3-1 and the fourth LED 3-4 are both vertical structure LEDs, and the other first line 10 of the first color sub-pixel sp1DD225478I-IMP includes a second LED 3-2, which is a flip-chip structure LED. Among them, the first LED 3-1 is connected with the second electrode 2 in an overlapping manner, the fourth LED 3-4 is connected with the auxiliary power supply line 8 in an overlapping manner, and the two ends of the auxiliary power supply line 8 are respectively connected with a first power supply line 4. In this embodiment, the design of the first sub-circuit 11 can improve the brightness compensation of the first color sub-pixel sp1, and the low light-emitting efficiency of a single LED 3 itself, and the first sub-circuit 11 occupies a smaller area, which is beneficial to reduce the space occupied by the first color sub-pixel sp1 and reduce the influence on the light transmission region 30 in the pixel unit P. In addition, Figure 14 In the embodiment, the two parallelly connected first lines 10 in the first color sub-pixel sp1 are arranged in the first direction x, which can multiplex the partial line segments in the auxiliary power supply line 8 as the first electrodes 1 of the sub-pixels sp, realize that the two ends of the auxiliary power supply line 8 are respectively connected with a first power supply line 4, and thus reduce the voltage drop of the first power supply signal transmission and improve the in-plane uniformity.

[0093] In some other embodiments, Figure 15 Another partial schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 6. Figure 15As shown, the first LED 3-1 and the second LED 3-2 are respectively located in two first lines 10; the first color sub-pixel sp1 further comprises a third LED 3-3, the third LED 3-3 is in series with the second LED 3-2 in a first sub-line 11, and the third LED 3-3 is electrically connected with the second electrode 2; the second LED 3-2 is electrically connected with the second electrode 2, the first LED 3-1 and the second LED 3-2 are both electrically connected with the first electrode 1, and part of the line segments of the auxiliary power line 8 are multiplexed as the first electrode 1. The embodiment can set that two ends of the auxiliary power line 8 are respectively connected with a first power line 4, thereby reducing the voltage drop of the first power signal transmission and improving the in-plane uniformity.

[0094] In some embodiments, as shown in FIG. 1, the first color sub-pixel sp1 is adjacent to the first power line 4 in the first direction x, and the second color sub-pixel sp2 and the third color sub-pixel sp3 are respectively located in two second lines 20. Figure 16 Another partial schematic view of a display panel provided by an embodiment of the present application is shown in FIG. 2. Figure 16 As shown, the first color sub-pixel sp1 is located between the other two sub-pixels sp in the pixel unit P.

[0095] In some embodiments, as shown in FIG. 1, the first color sub-pixel sp1 is adjacent to the first power line 4 in the first direction x, and the second color sub-pixel sp2 and the third color sub-pixel sp3 are respectively located in two second lines 20. Figure 4 、 Figure 9 or Figure 15 As shown in FIG. 1, the length of the first LED 3-1 along the first direction x is less than the length thereof along the second direction y, and the length of the second LED 3-2 along the first direction x is less than the length thereof along the second direction y, and the first LED 3-1 and the second LED 3-2 are both flip-chip structure LEDs. The first LED 3-1 and the second LED 3-2 are both long strip-shaped, and the long edges of both extend along the second direction y.

[0096] The second direction y extends, that is, the placement of the first LED 3-1 and the second LED 3-2 in the first color sub-pixel sp1 is consistent, and the long edges of both extend in the same direction as the first power line 4. In addition, the length of the LED 3 in the second color sub-pixel sp2 along the first direction x is less than the length thereof along the second direction y, and the length of the LED 3 in the third color sub-pixel sp3 along the first direction x is less than the length thereof along the second direction y, that is, the long edges of the LED 3 in the second color sub-pixel sp2 and the third color sub-pixel sp3 also extend along the second direction y within the pixel unit P. Such arrangement makes the first color sub-pixel sp1 and the LED 3 in the sub-pixel sp of other colors have the same arrangement rule, which is beneficial to simplifying the wiring mode of the driving line in the display panel. In addition, it can also make the first sub-pixel sp1 occupy less space in the first direction x, avoiding increasing the size of the pixel unit P in the first direction x to adversely affect the resolution of the display panel.

[0097] In some embodiments, as shown in FIG. 1, the first color sub-pixel sp1 is adjacent to the first power line 4 in the first direction x, and the second color sub-pixel sp2 and the third color sub-pixel sp3 are respectively located in two second lines 20. Figure 4 ,Figure 10 , or Figure 17 In some embodiments, the first LED 3-1 and the second LED 3-2 are both in a long strip shape, and the long sides of the two LEDs extend along the second direction y; the length of the third LED 3-3 along the first direction x is greater than the length of the third LED 3-3 along the second direction y. In these embodiments, the first LED 3-1, the second LED 3-2 and the third LED 3-3 are all in a flip-chip structure, and the LEDs 3 in the first color sub-pixel sp1 are all of the same type, the manufacturing process of the same type of LED chip is unified, the cost is low, and the same transfer process and transfer tool can also be used for the LEDs, which is beneficial to reduce the manufacturing cost of the display panel. In addition, the long side extension direction of the third LED 3-3 is crossed with the long side extension direction of the first LED 3-1 and the second LED 3-2, which is equivalent to that the first LED 3-1 and the second LED 3-2 are placed longitudinally and the third LED 3-3 is placed transversely. Such arrangement makes the placement of the LEDs 3 in the first color sub-pixel sp1 more compact, which is beneficial to reduce the space occupied by the first color sub-pixel sp1, so as to leave a larger light transmission area 30 in the pixel unit P, and improve the display effect in transparent display application.

[0098] In some other embodiments, Figure 17 Another display panel is provided in some embodiments of the present application. Figure 1 Only the position of the first color sub-pixel sp1 is shown, so as to Figure 17 Take the first sub-pixel sp1 as an example. As Figure 17 shown, the first color sub-pixel sp1 includes a first LED 3-1, a second LED 3-2 and a third LED 3-3, the first LED 3-1 and the third LED 3-3 are electrically connected to the second electrode 2 respectively, the first LED 3-1 and the second LED 3-2 are connected in series in the first sub-circuit 11, and the third LED 3-3 is connected in the first sub-circuit 11.

[0099] The second electrode 2 is connected to the pixel circuit (not shown) through the first via V1. The connection mode of the second electrode 2 and the pixel circuit can refer to Figure 5 or Figure 6 or Figure 17It can be understood that the first via V1 is located on the extension line of the third LED 3-3 in the first direction x, and the first via V1 is located on the extension line of the first LED 3-1 in the second direction y. It can be understood that the extension line of the third LED 3-3 and the extension line of the first LED 3-1 have a certain line width. In this embodiment, the first via V1 and the first LED 3-1 do not overlap, the first via V1 and the third LED 3-3 do not overlap, and a safe distance between the first LED 3-1 and the third LED 3-3 can be ensured. The first LED 3-1 and the third LED 3-3 are located in two first lines 10 respectively. In the manufacturing process, the first LED 3-1 and the third LED 3-3 are transferred in two transfer processes in sequence. After the first transfer, the LED 3 makes the position around it have a certain fluctuation (because the LED has a certain thickness, the height of the position where the LED is located is higher than the position without the transferred LED), so if the distance between the two transferred LEDs is too close, it may affect the transfer yield of the second transferred LED. The embodiment of the present application sets a safe distance between the first LED 3-1 and the third LED 3-3, which can ensure that when the first LED 3-1 and the third LED 3-3 are transferred in the first and second transfer processes in sequence, the first transferred LED 3 does not affect the yield of the second transferred LED.

[0100] In some embodiments, as shown in FIG. 2, along the second direction y, the first LED 3-1 and the third LED 3-3 partially overlap, and the second LED 3-2 and the third LED 3-3 partially overlap. The first LED 3-1, the second LED 3-2, and the third LED 3-3 are approximately arranged in the shape of a "pin" character. Figure 4 The overlapping part of the third LED 3-3 and the first LED 3-1 in the first direction x has a length of d1, and the overlapping part of the third LED 3-3 and the second LED 3-2 in the first direction x has a length of d2, d1 < d2. The first LED 3-1 and the third LED 3-3 respectively overlap and electrically connect with the second electrode 2. By setting the third LED 3-3 to overlap the second LED 3-2 in the second direction y, and the length of the overlapping part in the first direction x is relatively long, it can be ensured that the third LED 3-3 avoids the first via V1 at the position of the second electrode 2, so that the third LED 3-3 corresponds to the relatively flat position on the second electrode 2, and the transfer yield of the third LED 3-3 is ensured.

[0101] Along the second direction y, the first LED 3-1 and the third LED 3-3 partially overlap, and the second LED 3-2 and the third LED 3-3 partially overlap. Along the second direction y, the first LED 3-1 and the third LED 3-3 partially overlap, and the second LED 3-2 and the third LED 3-3 partially overlap.

[0102] The distance between the first LED 3-1 and the second LED 3-2 is d3, and the distance between the second LED 3-2 and the third LED 3-3 is d4, d3≥10μm, d4≥10μm. In one manufacturing method, when the first sub-pixel sp1 is manufactured, the first LED 3-1 and the second LED 3-2 are transferred in the first transfer process to form a first sub-circuit 11, and the third LED 3-3 is transferred in the second transfer process to form another first circuit 10. That is, after the first LED 3-1 and the second LED 3-2 are transferred, the third LED 3-3 is transferred to the corresponding position on the first sub-pixel sp1. A sufficient safety distance is provided between the third LED 3-3 and the first LED 3-1, and between the third LED 3-3 and the second LED 3-2, which can ensure that the high and low relief caused after the first LED 3-1 and the second LED 3-2 are transferred will not affect the transfer process of the third LED 3-3, and ensure the transfer yield of the third LED 3-3.

[0103] In some embodiments, as shown in Figure 7 、 Figure 10 or Figure 9 , the three second electrodes 2 of the three sub-pixels sp in the pixel unit P are arranged along the first direction x; in the first color sub-pixel sp1: the second electrode 2 extends along the second direction y, and the M LEDs 3 in the M first circuits 10 are arranged along the second direction y and are electrically connected with the second electrode 2. This embodiment sets the extension direction of the second electrode 2 in the first color sub-pixel sp1 and the arrangement direction of the M LEDs 3 connected with the second electrode 2, so that the two LEDs 3 arranged along the first direction x in the first color sub-pixel sp1 can be connected in series to form a first sub-circuit 11. In manufacturing, the LED 3 is transferred first to form the first sub-circuit 11, and then the LED is transferred to form another first circuit 10 as a redundant circuit. The placement position of the LED 3 in at least one first sub-circuit 11 in the first color sub-pixel sp1 is the same as the placement position of the LED 3 in the sub-pixel sp of other colors, which improves the distribution regularity of the light-emitting position (i.e. the placement position of the LED) of each sub-pixel sp, and when the first sub-circuit 11 contributes to the light-emitting of the first color sub-pixel sp1, the mixing effect of the three color sub-pixels sp can be better.

[0104] In other embodiments, as shown in Figure 13 、 Figure 14 or Figure 1As shown, in pixel unit P, the three second electrodes 2 of the three sub-pixels sp are arranged along the first direction x; in the first color sub-pixel sp1: the second electrode 2 extends along the first direction x, and M LEDs 3 in M ​​first lines 10 are arranged along the first direction x and electrically connected to the second electrode 2. In this embodiment, the M LEDs 3 connected to the second electrode 2 in the first color sub-pixel sp1 are arranged along the first direction x, and the second electrode 2 is arranged along the first direction x.

[0105] Furthermore, when parallel circuits are also set in other color sub-pixels sp, the graphic shape of the second electrode 2 of each sub-pixel sp is basically the same. Combined with the design that the second electrodes 2 of the three color sub-pixels sp are arranged in the same direction, the relative position of the second electrode 2 of each sub-pixel sp and the corresponding pixel circuit can be set to be basically the same, which facilitates the layout design of the pixel circuit in the display panel and reduces the difficulty of wiring design.

[0106] In some implementations, such as Figure 14 , Figure 15 or Figure 18 As shown, the display panel includes a first power line 4 extending along a second direction y and an auxiliary power line 8 extending along a first direction x. A first electrode 1 is electrically connected to the first power line 4, and at least one end of the auxiliary power line 8 is electrically connected to the first power line 4. In the first color sub-pixel sp1: one LED 3 in each of the M first lines 10 is electrically connected to the second electrode 2, and one LED 3 in each of the M first lines 10 is electrically connected to the first electrode 1. The first electrode 1 is connected to the first power line 4 via the auxiliary power line 8. This embodiment provides an auxiliary power line 8 electrically connected to the first power line 4. The extension direction of the auxiliary power line 8 is the same as the arrangement direction of the three color sub-pixels sp. Each LED in the color sub-pixel sp can be connected to the first power line 4 via the auxiliary power line 8. The three color sub-pixels sp in the pixel unit can share a single auxiliary power line 8, which simplifies the wiring in the display panel and saves space in the non-transparent area.

[0107] In some implementations, the two ends of the auxiliary power line 8 are respectively connected to a first power line 4. Figure 18 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention. Figure 4 Multiple pixel units P are illustrated, with pixel unit P only using Figure 18 For example, as shown in the illustration. Figure 7 As shown, the display panel includes a first power line 4 extending along the second direction y and an auxiliary power line 8 extending along the first direction x. Each end of the auxiliary power line 8 is connected to a first power line 4. The first power line 4 and the auxiliary power line 8 are cross-connected to form a mesh structure. This arrangement can reduce the overall impedance, reduce the voltage drop of the transmitted first power signal, and improve in-plane uniformity.

[0108] In some embodiments, as shown in Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 or Figure 19 , the display panel comprises a first power line 4 extending along the second direction y, and the first electrode 1 is electrically connected with the first power line 4. In the first color sub-pixel sp1: one LED 3 in each of the M first lines 10 is electrically connected with the second electrode 2, and the LED 3 in at least one of the M first lines 10 is directly electrically connected with the first power line 4.

[0109] The LED 3 in the first sub-line 11 can be directly electrically connected with the first power line 4, or the LED 3 in the first line 10 comprising only one LED 3 can be directly electrically connected with the first power line 4. Such arrangement is conducive to reducing the area occupied by the first color sub-pixel sp1 as a whole, thereby increasing the area of the light-transmitting region 30 in the pixel unit and improving the display effect in transparent display applications.

[0110] In some embodiments, Figure 19 Another schematic diagram of a display panel provided by an embodiment of the present application is shown in Figure 20 , the display area AA of the display panel comprises a first display area AA1 and a second display area AA2, and the value of M in the first color sub-pixel sp1 in the first display area AA1 is different from the value of M in the first color sub-pixel sp1 in the second display area AA2. The embodiment of the present application does not limit the size relationship between the first display area AA1 and the second display area AA2, or the position of the first display area AA1 and the second display area AA2 in the overall display area AA. The embodiment of the present application differentially sets the number of parallel lines included in the first color sub-pixel sp1 at different positions in the display area AA.

[0111] In some embodiments, the first display area AA1 and the second display area AA2 have different brightness requirements for the first color sub-pixel sp1 in applications, and the brightness of the first color sub-pixel sp1 in the two areas is controlled by setting different values of M in the first color sub-pixel sp1 in the two areas, which can reduce power consumption.

[0112] In some other embodiments, the first display area AA1 and the second display area AA2 are located at different positions of the display panel, and the yield of the two areas during LED transfer can be different. The M value of the first color sub-pixel sp1 in the two areas is set to be different, the M value set for the area with lower transfer yield is larger, and the first display area AA1 and the second display area AA2 can undergo different numbers of transfer processes to manufacture the first color sub-pixel sp1, so that the first color sub-pixel sp1 in the two areas can normally emit light.

[0113] Based on the same inventive concept, the embodiments of the present application also provide a display device, Figure 20 The display device provided by the embodiments of the present application is shown in the schematic diagram as ​ The display device provided by the embodiments of the present application is shown in the schematic diagram as

[0114] DD225478I-IMP

[0115] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0116] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized by, The display panel comprises a plurality of sub-pixels, the sub-pixels comprising first color sub-pixels, second color sub-pixels and third color sub-pixels of different colors, one first color sub-pixel, one second color sub-pixel and one third color sub-pixel constituting a pixel unit; the first color sub-pixel comprises M first lines connected in parallel, the M first lines comprising at least one first sub-line, the first sub-line comprising N LEDs connected in series, wherein M and N are positive integers, M≥2 and N≥2. The sub-pixel comprises a first electrode and a second electrode, and the M first lines are connected between the first electrode and the second electrode in parallel.

2. The display panel of claim 1, wherein The M first lines comprise at least one second sub-line, and the second sub-line comprises only one LED.

3. The display panel of claim 1, wherein The difference between the number of LEDs contained in any two of the M first lines is less than or equal to 1.

4. The display panel of claim 1, wherein The LEDs contained in at least two of the M first lines are flip-chip structure LEDs, and at least one of the first lines comprising flip-chip structure LEDs is the first sub-line.

5. The display panel of claim 1, wherein The first color sub-pixel comprises at least one vertical structure LED.

6. The display panel of claim 5, wherein The display panel comprises a connecting line directly connected to the vertical structure LED; The display panel comprises a substrate, the connecting line is located on the side of the vertical structure LED away from the substrate, and the material of the connecting line comprises a transparent material.

7. The display panel of claim 1, wherein One of the first electrode and the second electrode is connected to a positive power supply voltage, and the other is connected to a negative power supply voltage; the first electrodes of each sub-pixel are electrically connected to each other, and the second electrodes of the sub-pixels are isolated from each other; The second electrodes of the three color sub-pixels in the pixel unit are arranged along a first direction.

8. The display panel of claim 7, wherein Along the first direction, the second electrodes in the first color sub-pixels and the second electrodes in the second color sub-pixels at least partially overlap, and the second electrodes in the second color sub-pixels and the second electrodes in the third color sub-pixels are aligned.

9. The display panel of claim 7, wherein Each of the M first lines has one LED electrically connected to the second electrode, and the M LEDs electrically connected to the second electrode comprise a first LED; The first color sub-pixel further comprises a second LED, and the first LED and the second LED are adjacent in the first direction.

10. The display panel of claim 9, wherein The first LED and the second LED are connected in series in one first sub-line. The second electrode of the first color sub-pixel and the first electrode are adjacent in the first direction, and the second LED is electrically connected with the first electrode. 11.The display panel of claim 10, wherein, The first color sub-pixel further comprises a third LED, one end of the third LED is electrically connected with the second electrode, and the other end of the third LED is connected with the second LED and the same first electrode; the third LED, the first LED and the second LED are arranged in a "pin" shape. 12.The display panel of claim 10, wherein, The display panel comprises a first power line extending in a second direction, the second direction intersects the first direction, and the first electrode is coupled with the first power line; The first color sub-pixel further comprises a third LED, one end of the third LED is electrically connected with the second electrode; The first electrode of the first color sub-pixel comprises a first sub-electrode and a second sub-electrode, the second LED is electrically connected with the first sub-electrode, the first sub-electrode and the second electrode are arranged in the first direction, the other end of the third LED is electrically connected with the second sub-electrode, and part of the first power line is multiplexed as the second sub-electrode. 13.The display panel of claim 12, wherein, The third LED is a vertical structure LED; The third LED overlaps the second electrode, or the third LED overlaps the first power line. 14.The display panel of claim 9, wherein, The first LED and the second LED are respectively located in two first lines, and the second LED is electrically connected with the second electrode; The first LED is located in a first sub-line, and the first sub-line where the first LED is located further comprises a fourth LED, the fourth LED is arranged in a second direction with the first LED, and the second direction intersects the first direction. 15.The display panel of claim 14, wherein, The display panel comprises a first power line extending in a second direction and an auxiliary power line extending in the first direction, the second direction intersects the first direction, the first electrode is coupled with the first power line, and at least one end of the auxiliary power line is electrically connected with one of the first power lines; The first electrode of the first color sub-pixel comprises a first sub-electrode and a second sub-electrode, the second LED is electrically connected with the first sub-electrode, part of the auxiliary power line is multiplexed as the first sub-electrode, one end of the fourth LED is electrically connected with the second sub-electrode, and part of the first power line is multiplexed as the second sub-electrode. 16.The display panel of claim 15, wherein, The fourth LED is a vertical structure LED; The fourth LED overlaps the first power line, or the fourth LED and the first LED are connected in series through a connecting electrode, and the fourth LED overlaps the connecting electrode.

17. The display panel of claim 15, wherein, the first LED and the fourth LED are vertical structure LEDs; the first LED overlaps the second electrode, and the fourth LED overlaps the auxiliary power line.

18. The display panel of claim 9, wherein, the first LED and the second LED are located in two first lines respectively; the first color sub-pixel further comprises a third LED, the third LED and the second LED are connected in series in a first sub-line, and the third LED is electrically connected with the second electrode; the display panel comprises a first power line extending along a second direction and an auxiliary power line extending along the first direction, the second direction intersects the first direction, the first electrode is coupled with the first power line, and at least one end of the auxiliary power line is electrically connected with one of the first power lines; the first LED and the second LED are electrically connected with the first electrode, and part of the auxiliary power line is multiplexed as the first electrode.

19. The display panel of claim 9, wherein, a length of the first LED along the first direction is less than a length of the first LED along a second direction, the second direction intersects the first direction; a length of the second LED along the first direction is less than a length of the second LED along the second direction.

20. The display panel of claim 19, wherein, the first color sub-pixel further comprises a third LED, and a length of the third LED along the first direction is greater than a length of the third LED along the second direction.

21. The display panel of claim 9, wherein, the display panel comprises a pixel circuit, and the pixel circuit is electrically connected with the second electrode through a first via; in the first color sub-pixel, an LED directly electrically connected with the second electrode does not overlap the first via.

22. The display panel of claim 21, wherein, the first color sub-pixel further comprises a third LED, and the third LED is electrically connected with the second electrode; wherein the first via is located on an extension line of the third LED along the first direction, and the first via is located on an extension line of the first LED along a second direction, the second direction intersects the first direction.

23. The display panel of claim 22, wherein, along the second direction, the first LED and the third LED partially overlap, and the second LED and the third LED partially overlap; a length of the overlapping part of the third LED and the first LED along the first direction is d1, and a length of the overlapping part of the third LED and the second LED along the first direction is d2, d1 < d2.

24. The display panel of claim 22, wherein, along the second direction, the first LED and the third LED partially overlap, and the second LED and the third LED partially overlap; In the second direction, a distance between the first LED and the third LED is d3, and a distance between the second LED and the third LED is d4, d3≥10μm, and d4≥10μm.

25. The display panel of claim 7, wherein, in the first color sub-pixel: the second electrode extends in a second direction, the second direction being transverse to the first direction; M LEDs in the M first lines are arranged in the second direction and electrically connected to the second electrode.

26. The display panel of claim 7, wherein, in the first color sub-pixel: the second electrode extends in the first direction, and M LEDs in the M first lines are arranged in the first direction and electrically connected to the second electrode.

27. The display panel of claim 7, wherein, the display panel comprises a first power line extending in a second direction and an auxiliary power line extending in the first direction, the first electrode is electrically connected to the first power line, the second direction being transverse to the first direction, and at least one end of the auxiliary power line is electrically connected to the first power line; in the first color sub-pixel, one LED in each of the M first lines is electrically connected to the second electrode, one LED in each of the M first lines is electrically connected to the first electrode, and the first electrode is connected to the first power line through the auxiliary power line.

28. The display panel of claim 27, wherein, both ends of the auxiliary power line are electrically connected to one of the first power lines.

29. The display panel of claim 7, wherein, the display panel comprises a plurality of first power lines extending in a second direction, the first electrode is electrically connected to the first power lines, and the second direction is transverse to the first direction; in the first color sub-pixel, one LED in each of the M first lines is electrically connected to the second electrode, and the LED in at least one of the M first lines is directly electrically connected to the first power line.

30. The display panel of claim 7, wherein, the pixel unit comprises a light-transmitting region and a non-light-transmitting region, and the LEDs in the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are located in the non-light-transmitting region.

31. The display panel of claim 7, wherein, the second color sub-pixel comprises at least two second lines connected in parallel, each of the second lines comprising one LED, and in the second color sub-pixel, the second lines are arranged in the first direction; the third color sub-pixel comprises at least two third lines connected in parallel, each of the third lines comprising one LED, and in the third color sub-pixel, the third lines are arranged in the first direction.

32. The display panel of claim 31, wherein, In the second color sub-pixel, a length of the LED along the first direction is less than a length of the LED along the second direction, the second direction being transverse to the first direction; In the third color sub-pixel, a length of the LED along the first direction is less than a length of the LED along the second direction.

33. The display panel of claim 1, wherein the first electrodes of the sub-pixels are electrically connected to each other, and the second electrodes of the sub-pixels are electrically isolated from each other; the display panel further comprises a first power line, the first electrodes are electrically connected to the first power line, and the first power line, the first electrodes and the second electrodes are located in the same layer; the display panel comprises a substrate and a pixel circuit located on one side of the substrate, the second electrodes are located on a side of the film layer away from the pixel circuit, and the LEDs in the sub-pixels are located on a side of the second electrodes away from the pixel circuit, and the pixel circuit is electrically connected to the second electrodes through a via hole penetrating through an insulating layer.

34. The display panel of claim 1, wherein a display area of the display panel comprises a first display area and a second display area, and a value of M in the first color sub-pixels in the first display area is different from a value of M in the first color sub-pixels in the second display area.

35. A display device comprising: a display panel as claimed in any one of claims 1 to 34.

Images