Display panel and display device

Abstract

The embodiment of the present application provides a display panel and a display device. The display panel comprises a plurality of parallel first lines, the first line comprises an LED, at least one of the first lines comprises parallel LEDs; and / or, the display panel comprises a plurality of LEDs, two poles of at least one of the LEDs are electrically connected to the same electrode respectively via different LEDs. The present application can improve the brightness of the pixel without increasing the power consumption, thereby compensating for the problem that the brightness is low due to the low light-emitting efficiency of the LED itself.

Description

Technical Field

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

[0002] Micro-LEDs (Micro Light-Emitting Diodes) are a new technology that significantly reduces the size of traditional light-emitting diodes. They utilize arrays of independently emitting red, blue, and green micro-LEDs to form display arrays, making them suitable for display technology. Micro-LEDs possess self-emissive display characteristics and, compared to organic light-emitting diodes (OLEDs), offer higher efficiency, longer lifespan, and relatively stable materials less susceptible to environmental influences. Micro-LEDs have become a key focus of research in the display field. However, currently, among the three types of micro-LED chips, some suffer from low luminous efficiency due to limitations in chip manufacturing materials. Low luminous efficiency results in lower brightness for sub-pixels. Summary of the Invention

[0003] This invention provides a display panel and a display device to solve the technical problem of increasing the luminous brightness of sub-pixels without increasing power consumption.

[0004] In a first aspect, embodiments of the present invention provide a display panel, the display panel including a plurality of first lines connected in parallel, the first lines including LEDs, at least one of the first lines including LEDs connected in parallel; and / or, the display panel including a plurality of LEDs, at least one of the two poles of the LEDs being electrically connected to the same electrode with different LEDs respectively.

[0005] Secondly, embodiments of the present invention provide another display panel, the display panel including a plurality of LEDs, wherein at least some of the LEDs are connected in parallel and at least some of the LEDs are connected in series.

[0006] Thirdly, based on the same inventive concept, embodiments of the present invention also provide a display device, including the display panel provided in any embodiment of the present invention.

[0007] The display panel and display device provided in this invention have the following beneficial effects: Compared to a circuit containing only one LED, this application significantly improves the overall brightness while providing the same driving current. This increases brightness without increasing power consumption, thus compensating for the low brightness caused by the low luminous efficiency of the LED itself. Furthermore, the parallel redundant circuit ensures that the LEDs bound to the redundant circuit emit light normally even when there are luminous defects, guaranteeing pixel illumination and thus ensuring normal operation of the display panel. The parallel redundant circuit design allows for repair of LED transfer defects during manufacturing, reducing waste boards and saving costs. Moreover, the redundant circuit with bound LEDs can compensate for LED damage defects that occur during use, thereby extending the lifespan of the display panel. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a partial schematic diagram of a display panel provided in an embodiment of the present invention; Figure 2 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 3 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 4 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 5 for Figure 1 A schematic diagram of a cross-section at the position of the tangent AA′; Figure 6 for Figure 1 Another cross-sectional view at the location of the tangent AA′; Figure 7 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 8 for Figure 7 A schematic diagram of a cross section at the position of the tangent line B-B′; Figure 9 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 10 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 11This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 12 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 13 A partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 14 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 15 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 16 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 17 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 18 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention; Figure 19 This is a schematic diagram of another display panel provided in an embodiment of the present invention; Figure 20 This is a schematic diagram of a display device provided in an embodiment of the present invention. Detailed Implementation

[0010] 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.

[0011] 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.

[0012] For chips with low luminous efficiency, increasing the driving current can increase their brightness; however, increasing the driving current inevitably leads to increased power consumption. This method of achieving high brightness at the expense of power consumption is not recommended. This invention provides a display panel with series-connected lines in sub-pixels, where at least two LEDs (Light Emitting Diodes) are connected in series. This increases the overall brightness of the series-connected lines without increasing the driving current, thereby increasing the brightness of the sub-pixels without increasing power consumption.

[0013] 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.

[0014] The first color sub-pixel sp1 includes M first lines 10 connected in parallel. Each of the M first lines 10 includes at least one first sub-line 11. The first sub-line 11 includes N LEDs 3 connected in series, where M and N are both positive integers, M ≥ 2, and N ≥ 2. The LEDs 3 connected in series in the first sub-line 11 are electrically connected via connecting electrodes 5.

[0015] Figure 1 The diagram uses M=2 and N=2 as an example. The M first lines 10 include one first sub-line 11. Figure 1 The dashed lines with arrows in the middle indicate the lines in the sub-pixel sp. It can be seen that the second color sub-pixel sp2 includes two parallel lines, and each line includes an LED3. The third color sub-pixel sp3 also includes two parallel lines, and each line includes an LED3.

[0016] In this embodiment of the invention, the "line" in the sub-pixel sp includes a line capable of forming a path, and an LED3 is provided in the line capable of forming a path, for example... Figure 1 The first sub-line 11 of the first color sub-pixel sp1 includes two LEDs 3, forming a path of anode → LED3 → LED3 → cathode. The path in the second color sub-pixel sp2 is anode → LED3 → cathode.

[0017] In some implementations, the "line" in sub-pixel sp may also include a broken line, which is a redundant position set in sub-pixel sp. Figure 2 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention, such as... Figure 2 As shown, the second color sub-pixel sp2 includes two lines connected in parallel. One line is anode → LED3 → cathode, and the other line does not have an LED attached and only includes the corresponding first electrode 1 and second electrode 2. Therefore, the line without an LED attached is a redundant position.

[0018] The second color subpixel sp2 in the display panel can be manufactured as follows: During the manufacturing of the display panel, a position is preset at the location of the second color subpixel sp2 to form two parallel lines. First, multiple LEDs 3 are transferred to multiple corresponding preset positions on the display panel. Each second color subpixel sp2 corresponds to one preset position, meaning that the second color subpixels 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 subpixel sp2. After transferring the LEDs 3, the light emission of the second color subpixels sp2 in the display panel is detected. When it is detected that all second color subpixels sp2 can emit light normally, a second transfer is not performed, and a redundant position 20′ is reserved in the second color subpixel sp2. No LED is bound at the redundant position 20′, and a first electrode 1 and a second electrode 2 are correspondingly set at this position, forming a broken line at the redundant position 20′.

[0019] Figure 2 The diagram illustrates that the third color sub-pixel sp3 includes two parallel lines, each line containing an LED3. During the manufacturing of the display panel, a pre-defined position is provided at the location of the third color sub-pixel sp3 to form two parallel lines.

[0020] In some implementations, the two LEDs 3 in the third color sub-pixel sp3 are fabricated in two separate transfer processes. For example, in the first transfer process, one LED 3 is 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. If it is detected that some of the third color sub-pixels sp3 are defective and cannot emit light normally, a second transfer process is performed to transfer the second LED 3 to the corresponding position of the third color sub-pixel sp3. This results in the third color sub-pixel sp3 comprising two LEDs 3 connected in parallel. The defects in some of the third color sub-pixels sp3 after the first transfer process may be due to defects in the transferred LEDs themselves or defects caused by poor transfer processes. This implementation uses the second transfer process to repair defective pixels to ensure that all third color sub-pixels sp3 can emit light normally. When both LEDs 3 in the third color sub-pixel sp3 can emit light normally, the circuit containing one of the LEDs can be considered a redundant circuit.

[0021] 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.

[0022] 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 a redundant line, and the second sub-line 12 is connected in parallel with the first sub-line 11. The second sub-line 12 includes an 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 a redundant position. For example, if the LED3 is not bound in the second sub-line 12, a redundant position is formed, which will not be shown in the accompanying drawings.

[0023] 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 employs a parallel line design for redundancy, with one first sub-line 11 serving as the main line and the parallel lines other than the main line serving 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, the overall brightness of the first sub-line 11 is significantly improved when providing the same driving current. This allows for increased 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 LEDs 3 in the first color sub-pixel sp1. Furthermore, the first color sub-pixel sp1 includes a redundant line connected in parallel with the first sub-line 11. When the first sub-line 11 has a luminous defect, the LEDs 3 bound in the redundant line emit light normally, ensuring the luminous function of the first color sub-pixel sp1 and thus guaranteeing the normal operation of the display panel. The first color sub-pixel sp1 uses a parallel circuit design for redundancy. During manufacturing, the redundant circuit can repair LED3 transfer defects, reducing the generation of scrap boards and saving costs. Moreover, the redundant circuit bound to LED3 can compensate for LED3 damage defects that occur during use, thereby extending the lifespan of the display panel.

[0024] 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.

[0025] 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.

[0026] 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 4As 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 larger 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.

[0027] In some implementations, such as Figure 4 As 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 LED 3. Compared to 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 LED 3 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 LED 3, 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, thereby ensuring that a larger light-transmitting area 30 is reserved in the pixel unit P. This can improve the transparency of transparent displays.

[0028] 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 3For 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 all M first lines 10 in the first color sub-pixel sp1 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.

[0029] 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 LED3 in the first sub-line 11 is a flip-chip LED, and LED3 in the other second sub-line 12 is also a flip-chip LED. The first sub-line 11 and at least one first line 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.

[0030] 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.

[0031] 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 5As 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 5 Only 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.

[0032] like Figure 5 As shown, the connecting electrode 5 is located on the same layer as the first power line 4, the first electrode 1, and the second electrode 2. The connecting electrode 5 is connected between two LEDs 3 connected in series. The connecting electrode 5 occupies a small area and does not affect the wiring space of the first power line 4.

[0033] 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.

[0034] like Figure 5As 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.

[0035] In other implementations, Figure 6 for Figure 1 Another cross-sectional diagram at the location of the tangent AA′. (See diagram below.) Figure 6 As shown, the display panel also includes a transition metal 03. The pixel circuit 01 is connected to the transition metal 03 through a second via V2 penetrating the insulating layer. The transition metal 03 is connected to the second electrode 2 through a first via V1 penetrating the insulating layer, thus connecting the pixel circuit 01 to the second electrode 2. In this embodiment, a second power line can be fabricated on the same layer as the transition metal 03. The second power line transmits a second power signal, and the power supply terminal 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 supply voltage, and the other provides a negative power supply voltage.

[0036] In some implementations... Figure 7 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention, such as... Figure 7 As shown, the first color sub-pixel sp1 includes at least one vertical structure LED6. The vertical structure LED6 means that the anode electrode and cathode electrode of the LED are located on opposite sides of the light-emitting layer. Figure 7 The diagram illustrates a first sub-line 11 comprising two flip-chip LEDs 3 connected in series, and another first line 10 comprising a vertical LED 6. Optionally, the first sub-line 11 may also include a vertical LED, as illustrated and explained in the following related embodiments. Compared to flip-chip LEDs, vertical LEDs occupy a relatively smaller area. By including at least one vertical LED in the first color sub-pixel sp1, the smaller area of ​​the vertical LED can compensate for the impact of the first sub-line 11 on the overall area occupied by the first color sub-pixel sp1, thereby reducing the impact on the light-transmitting area in the display panel. When applied to transparent displays, this ensures overall light transmittance.

[0037] In some embodiments, the display panel includes connecting lines that are directly connected to the vertical structure LEDs, the connecting lines being used to electrically connect the vertical structure LEDs to corresponding electrodes. Figure 8 for Figure 7 A schematic diagram of a cross-section at the position of the midtangent B-B′. (Example) Figure 8 As shown, the side of the vertical LED 6 closest to the substrate 00 is electrically connected to the second electrode 2, and the side of the vertical LED 6 furthest from the substrate 00 is connected to the first power line 4 via a connecting line 7. The connecting line 7 is located on the side of the vertical LED 6 furthest from the substrate 00, and is electrically connected to the first power line 4 through a third via V3. The connecting line 7 is made of a transparent material, such as indium tin oxide. In this embodiment, the transparent material used for the connecting line 7 improves its light transmittance, thereby further improving the overall light transmittance of the display panel. When applied to transparent displays, this enhances the transparency of the display.

[0038] Depend on Figure 8 It can also be seen that the LED directly connected to the second electrode 2 does not overlap with the first via V1. This setting can ensure that the LED is transferred to a relatively flat substrate, thus improving the transfer yield.

[0039] In some implementations, such as 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; the second electrodes 2 of the three color sub-pixels sp in pixel unit P 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 to the sub-pixel sp. The pixel circuit 01 and the second electrode 2 are electrically connected through the first via V1 penetrating the insulating layer. In this embodiment of the invention, the three second electrodes 2 in the pixel unit P are arranged along the same direction, so the connection method between each pixel circuit 01 and the second electrode 2 in the corresponding sub-pixel sp (e.g., the relative position between the first via V1 and the pixel circuit 01) will not differ too much, which facilitates the layout design of the pixel circuit 01 in the display panel, enables the regular arrangement of multiple pixel circuits 01, simplifies the wiring method of the display panel, and reduces the difficulty of wiring design.

[0040] like Figure 4As 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. By setting the three second electrodes 2 corresponding to the three color sub-pixels sp in the same pixel unit P to be approximately on the same line, the relative positions of the second electrode 2 in each sub-pixel sp and the corresponding pixel circuit 01 are basically the same, enabling identical design of the layout of each pixel circuit 01 and reducing process complexity.

[0041] Figure 4 In the embodiment, it is shown that 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 are partially misaligned.

[0042] In other implementations, Figure 9 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention. Figure 9 This illustrates the location of a pixel unit P, as shown below. Figure 9 As shown, along the first direction x, 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 basically aligned. This embodiment allows the second electrodes 2 of each color sub-pixel sp to be positioned relatively the same as the pixel circuit 01, enabling identical design for the layout of each pixel circuit 01, thus simplifying the manufacturing process.

[0043] In some implementations, such as Figure 4 As shown, the second color sub-pixel sp2 includes at least two second lines 20 connected in parallel, each second line 20 including an 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, each third line 40 including an 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 third lines 40 are arranged along the first direction x. Combined with the design that the second electrodes 2 of the three color sub-pixels sp are arranged along the first direction x, it is advantageous to set the relative positions of the second electrodes 2 of each color sub-pixel sp and the pixel circuit 01 to be basically the same, enabling the same design for the layout of each pixel circuit 01, and simplifying the process.

[0044] Figure 4 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 two or more second lines 20 and / or the third color sub-pixel sp3 includes two or more third lines 40.

[0045] In this embodiment of the invention, the first color sub-pixel sp1 includes M first lines 10, each of which has an LED 3 electrically connected to the second electrode 2. That is, M LEDs in the first color sub-pixel sp1 are electrically connected to the second electrode 2, thus enabling the M first lines 10 to be connected in parallel. Optionally, when the LED 3 connected to the second electrode 2 is a flip-chip LED, it overlaps and is electrically connected to the second electrode 2. When the LED 3 connected to the second electrode 2 is a vertical LED, it overlaps and is electrically connected to the second electrode 2, or it does not overlap but is electrically connected to the second electrode 2 through a connecting line. Figure 4 or Figure 9 As shown, the first color sub-pixel sp1 includes M LEDs 3 electrically connected to the second electrode 2, including a first LED 3-1; the first color sub-pixel sp1 also 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. In the pixel unit P, the arrangement direction of the three sub-pixels sp is the first direction x. In this embodiment, 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. This facilitates a compact arrangement of the LEDs 3 in the first color sub-pixel sp1, resulting in a relatively concentrated arrangement of the three sub-pixels sp in the pixel unit P, thus leaving a larger light-transmitting area 30 within the area occupied by the pixel unit P. Furthermore, when the first LED 3-1 and the second LED 3-2 emit light normally and contribute to the light emission of the first color sub-pixel sp1, it ensures more uniform color mixing between the first color sub-pixel sp1 and other sub-pixels sp.

[0046] like Figure 4 or Figure 9 As shown, both the second color sub-pixel sp2 and the third color sub-pixel sp3 include parallel circuits. The two LEDs 3 connected in parallel in the second color sub-pixel sp2 are arranged along the first direction x, and the two LEDs 3 connected in parallel in the third color sub-pixel sp3 are also arranged along the first direction x. By setting the arrangement direction of the first LED 3-1 and the second LED 3-2 in the first color sub-pixel sp1 to be the same as the arrangement direction of the LEDs 3 in other sub-pixels sp, and combining this with the design that the second electrodes 2 of the three sub-pixels sp in the pixel unit P are arranged along the first direction x, the first color sub-pixel sp1 has the same arrangement pattern of LEDs 3 as other color sub-pixels sp, which helps to simplify the wiring method of the driving circuit in the display panel.

[0047] In some implementations, such as Figure 4 As shown, 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 adjacent in the first direction x, and the second LED 3-2 is electrically connected to the first electrode 1. Figure 4 It is shown that the first LED 3-1 and the second LED 3-2 are connected in series through the connection electrode 5, and the first LED 3-1 and the second LED 3-2 will light up simultaneously to emit light. Moreover, the arrangement directions of the first LED 3-1 and the second LED 3-2 are the same as the arrangement directions of the three sub-pixels sp in the pixel unit P. When the first sub-circuit 11 where the first LED 3-1 and the second LED 3-2 are located emits light normally, it can not only improve the light-emitting brightness of the first color sub-pixel sp1 to compensate for the deficiency of the low light-emitting efficiency of this type of color LED chip itself, but also ensure that the first color sub-pixel sp1 is mixed with other sub-pixels sp more evenly.

[0048] As Figure 4 shown, the first color sub-pixel sp1 further includes a third LED 3-3. One end of the third LED 3-3 is electrically connected to the second electrode 2, 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 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 separately located in a first circuit 10, and the first circuit 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 circuit 10 where the third LED 3-3 is located is a redundant circuit set in the first color sub-pixel sp1. When there is a light-emitting defect in the first sub-circuit 11, the third LED 3-3 bound in the redundant circuit emits light normally, which can ensure the light emission of the first color sub-pixel sp1, thereby ensuring the normal use of the display panel. During manufacturing, the redundant circuit can repair the transfer defect of the LED in the first sub-circuit 11, reduce the generation of waste boards and save costs; moreover, the redundant circuit where the third LED 3-3 is located can compensate for the LED 3 damage defect that occurs during use, thereby extending 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 arranged relatively compactly, which can leave a larger light-transmitting area 30 within the occupied area of the pixel unit P, improving the display effect applied in transparent display.

[0049] Figure 4 In the embodiment, it is shown that there is a first electrode 1 of the first color sub-pixel sp1 between the second electrode 2 of the first color sub-pixel sp1 and the second electrode 2 of another sub-pixel sp.

[0050] In another embodiment, Figure 10 Another partial schematic diagram of the display panel provided by the embodiment of the present invention is shown. As 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 LED 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-pixels sp1 are adjacent to the second electrodes 2 of another sub-pixel sp.

[0051] 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, in the pixel unit P, three second electrodes 2 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 line 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, and a partial line segment in the first power line 4 is multiplexed as the second sub-electrode 1-2. In this embodiment, the first line 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 shown in Figure 11 It is schemed 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 high transparency in transparent display when applied to transparent display.

[0052] In some other embodiments, the third LED 3-3 is located in a first line 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 the impact of the third LED 3-3 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.

[0053] 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.

[0054] 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.

[0055] 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 reused 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 reused 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. The placement of the fourth LED 3-4 is designed, as follows: 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.

[0056] 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.

[0057] 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 and the first LED 3-1 are connected in series via a connecting electrode 5. The fourth LED 3-4 and the connecting electrode 5 are electrically connected in an overlapping manner. The fourth LED 3-4 is also connected to the first power line 4 via a second connecting line 7-2. Optionally, the second connecting line 7-2 may be made of a transparent material. In this embodiment, setting the fourth LED 3-4 as a vertical structure LED further reduces the impact of the fourth LED 3-4 on the area of ​​the light-transmitting region 30 within the pixel unit P, thereby improving the light transmittance of the pixel unit P.

[0058] In other embodiments, the fourth LED3-4 is connected in series with the first LED3-1 through the connecting electrode 5, the fourth LED3-4 overlaps with and is electrically connected to the first power line 4, and the fourth LED3-4 is also electrically connected to the connecting electrode 5 through the connecting line, which will not be shown in the figure here.

[0059] In other implementations, Figure 14 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention, such as... Figure 14 As shown, in the first sub-line 11, the first LED 3-1 and the fourth LED 3-4 are connected in series. Both the first LED 3-1 and the fourth LED 3-4 are vertical structure LEDs. The other first line 10 of the first color sub-pixel sp1 includes a second LED 3-2, which is a flip-chip LED. The first LED 3-1 overlaps with and is electrically connected to the second electrode 2, and the fourth LED 3-4 overlaps with and is electrically connected to the auxiliary power line 8. Each end of the auxiliary power line 8 is connected to a first power line 4. In this embodiment, the design of the first sub-line 11 can improve the brightness of the first color sub-pixel sp1 to compensate for the low luminous efficiency of a single LED 3. Furthermore, the first sub-line 11 occupies a relatively small area, which helps to reduce the space occupied by the first color sub-pixel sp1 and reduce the impact on the light-transmitting area 30 within the pixel unit P. Additionally, Figure 14 In the embodiment, the two parallel-connected first lines 10 in the first color sub-pixel sp1 are arranged in the first direction x, which can reuse the partial line segments in the auxiliary power line 8 as the first electrode 1 of each sub-pixel sp, so that the two ends of the auxiliary power line 8 are respectively connected to a first power line 4, thereby reducing the voltage drop of the first power signal and improving the in-plane uniformity.

[0060] In other implementations, Figure 15 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention, such as... 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 also includes a third LED 3-3, which is connected in series with the second LED 3-2 in a first sub-line 11, and is electrically connected to the second electrode 2; the second LED 3-2 is electrically connected to the second electrode 2, and both the first LED 3-1 and the second LED 3-2 are electrically connected to the first electrode 1. A portion of the auxiliary power line 8 is multiplexed as the first electrode 1. This embodiment can set both ends of the auxiliary power line 8 to be connected to a first power line 4, thereby reducing the voltage drop of the transmitted first power signal and improving in-plane uniformity.

[0061] In the above embodiments, the first color sub-pixel sp1 and the first power line 4 are shown to be adjacent in the first direction x. In other embodiments, Figure 16 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention, such as... Figure 16 As shown, in pixel unit P, the first color sub-pixel sp1 is located between the other two sub-pixels sp.

[0062] In some implementations, such as Figure 4 , Figure 9 or Figure 15 As shown, the length of the first LED 3-1 along the first direction x is less than its length along the second direction y, and the length of the second LED 3-2 along the first direction x is less than its length along the second direction y. Both the first LED 3-1 and the second LED 3-2 are flip-chip LEDs. Both the first LED 3-1 and the second LED 3-2 are elongated strips, with their long sides extending along the second direction y. This means they are arranged in the same way within the first color sub-pixel sp1, and the direction of their long sides is the same as the direction of the first power line 4. Furthermore, the length of LED 3 in the second color sub-pixel sp2 along the first direction x is less than its length along the second direction y, and the length of LED 3 in the third color sub-pixel sp3 along the first direction x is less than its length along the second direction y. This means that the long sides of LED 3 in the second color sub-pixel sp2 and the third color sub-pixel sp3 within pixel unit P also extend along the second direction y. This arrangement ensures that the LED 3 in the first color sub-pixel sp1 and other color sub-pixels sp have the same arrangement pattern, which helps simplify the wiring of the driving circuitry in the display panel. In addition, it can make the space occupied by the first sub-pixel sp1 in the first direction x smaller, avoiding the increase of the size occupied by the pixel unit P in the first direction x, which would have an adverse effect on the resolution of the display panel.

[0063] In some implementations, such as Figure 4 , Figure 10 ,or Figure 15In these embodiments, the first LED3-1 and the second LED3-2 are both elongated strips, with their long sides extending along the second direction y; the length of the third LED3-3 along the first direction x is greater than its length along the second direction y. In these embodiments, the first LED3-1, the second LED3-2, and the third LED3-3 are all flip-chip structures, and the LEDs 3 in the first color sub-pixel sp1 are all of the same type. 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 for LED manufacturing, which helps to reduce the manufacturing cost of the display panel. In addition, the long side extension direction of the third LED3-3 intersects the long side extension direction of the first LED3-1 and the second LED3-2, which is equivalent to the first LED3-1 and the second LED3-2 being arranged vertically and the third LED3-3 being arranged horizontally. This arrangement makes the placement of LEDs 3 in the first color sub-pixel sp1 more compact, which helps to reduce the space occupied by the first color sub-pixel sp1, so as to leave a larger area of ​​light-transmitting area 30 within the area occupied by the pixel unit P, thereby improving the display effect when applied to transparent displays.

[0064] In other implementations, Figure 17 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention. Figure 17 Only the location of the first color sub-pixel sp1 is shown, in order to Figure 1 Taking the first sub-pixel sp1 as an example. Figure 17 As 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. 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 located in a first line 10. The second electrode 2 is connected to the pixel circuit through a first via V1. Figure 17 (Not shown) The connection method between the second electrode 2 and the pixel circuit can be referred to Figure 5 or Figure 6Understand the embodiments. Among them, the first via V1 is located on the extension line of the third LED3-3 in the first direction x, and the first via V1 is located on the extension line of the first LED3-1 in the second direction y. It can be understood that both the extension line of the third LED3-3 and the extension line of the first LED3-1 have a certain line width. In this embodiment, the first via V1 and the first LED3-1 do not overlap, the first via V1 and the third LED3-3 do not overlap, and a safety distance can be ensured between the first LED3-1 and the third LED3-3. The first LED3-1 and the third LED3-3 are respectively located in two first circuits 10. During manufacturing, the first LED3-1 and the third LED3-3 are transferred in two transfer processes successively. After the first transfer of the LED3, there is a certain undulation around its location (because the LED has a certain thickness, making the height of its location higher than that of the position without the transferred LED). Therefore, if the distance between the two transferred LEDs is too close, it may affect the transfer yield of the second transferred LED. In the embodiment of the present invention, a safety distance is set between the first LED3-1 and the third LED3-3, which can ensure that when the first LED3-1 and the third LED3-3 are transferred in two transfer processes successively, the first transferred LED3 does not affect the yield of the second transfer.

[0065] In some embodiments, as Figure 17 shown, along the second direction y, the first LED3-1 and the third LED3-3 partially overlap, and the second LED3-2 and the third LED3-3 partially overlap; the first LED3-1, the second LED3-2, and the third LED3-3 are approximately arranged in a "pin" shape. The length of the overlapping part of the third LED3-3 and the first LED3-1 in the first direction x is d1, and the length of the overlapping part of the third LED3-3 and the second LED3-2 in the first direction x is d2, where d1 < d2. The first LED3-1 and the third LED3-3 respectively overlap and are electrically connected to the second electrode 2. By setting the third LED3-3 to overlap with the second LED3-2 in the second direction y and the overlapping part having a longer length in the first direction x, it can be ensured that the third LED3-3 avoids the first via V1 at the position of the second electrode 2, making the third LED3-3 correspond to a relatively flat position on the second electrode 2 and ensuring the transfer yield of the third LED3-3.

[0066] Along the second direction y, the first LED3-1 and the third LED3-3 partially overlap, and the second LED3-2 and the third LED3-3 partially overlap; along the second direction y, the distance between the first LED3-1 and the third LED3-3 is d3, and the distance between the second LED3-2 and the third LED3-3 is d4, where d3 ≥ 10 μm and d4 ≥ 10 μm. In one manufacturing method, when manufacturing the first sub-pixel sp1, the first LED3-1 and the second LED3-2 are transferred in the first transfer process to form a first sub-line 11, and the third LED3-3 is transferred in the second transfer process to form another first line 10. That is, after transferring the first LED3-1 and the second LED3-2, the third LED3-3 is transferred to the corresponding position on the first sub-pixel sp1. Sufficiently large safety distances are set between the third LED3-3 and the first LED3-1, as well as between the third LED3-3 and the second LED3-2, to ensure that the height fluctuations caused after the transfer of the first LED3-1 and the second LED3-2 will not affect the transfer process of the third LED3-3, thus ensuring the transfer yield of the third LED3-3.

[0067] In some implementations, such as Figure 4 , Figure 7 or Figure 10 As 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 second direction y, and M LEDs 3 in M ​​first lines 10 are arranged along the second direction y and electrically connected to 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 to the second electrode 2, so that 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-line 11. During manufacturing, LEDs 3 are preferentially transferred to form the first sub-line 11, and then LEDs are transferred to form another first line 10 as a redundant line. The placement position of LEDs 3 in at least one first sub-line 11 in the first color sub-pixel sp1 is the same as the placement position of LEDs 3 in other color sub-pixels sp, improving the regularity of the light-emitting positions (i.e., LED placement positions) of each sub-pixel sp. When the light emission of the first sub-line 11 contributes to the light emission of the first color sub-pixel sp1, the color mixing effect of the three color sub-pixels sp can be better.

[0068] In other implementations, such as Figure 9 , Figure 13 or Figure 14As 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 the 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 extends along the first direction x. When parallel lines 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 is basically the same, which facilitates the layout design of the pixel circuit in the display panel and reduces the difficulty of wiring design.

[0069] In some implementations, such as Figure 1 , Figure 14 or Figure 15 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.

[0070] 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 18 Multiple pixel units P are illustrated, with pixel unit P only using Figure 4 For example, as shown in the illustration. Figure 18 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.

[0071] In some implementations, such as Figure 7 , Figure 9 , Figure 10 , Figure 11 , Figure 12 or Figure 13 As shown, the display panel includes a first power line 4 extending along the second direction y, and a first electrode 1 electrically connected to the first power line 4. In the first color sub-pixel sp1: each of the M first lines 10 has an LED 3 electrically connected to the second electrode 2, and at least one of the M first lines 10 has an LED 3 directly connected to the first power line 4. This connection can be made by the LED 3 in the first sub-line 11 being directly connected to the first power line 4, or by the LED 3 in the first line 10 containing only one LED 3 being directly connected to the first power line 4. This arrangement helps to reduce the overall area occupied by the first color sub-pixel sp1, thereby increasing the area of ​​the light-transmitting area 30 in the pixel unit and improving the display effect when used in transparent displays.

[0072] In some implementations... Figure 19 This is another schematic diagram of a display panel provided in an embodiment of the present invention, such as... Figure 19 As shown, the display area AA of the display panel includes a first display area AA1 and a second display area AA2. The M value of the first color sub-pixel sp1 in the first display area AA1 is different from the M value of the first color sub-pixel sp1 in the second display area AA2. This embodiment of the invention does not limit the size relationship between the first display area AA1 and the second display area AA2, nor their positions within the overall display area AA. This embodiment of the invention differentiates the number of parallel lines included in the first color sub-pixel sp1 at different positions within the display area AA.

[0073] In some implementations, the first display area AA1 and the second display area AA2 have different brightness requirements for the first color sub-pixel sp1 in the application. By setting different M values ​​in the first color sub-pixel sp1 in the two areas, the brightness of the first color sub-pixel sp1 in the two areas can be controlled to be different, which can reduce power consumption.

[0074] In other embodiments, the first display area AA1 and the second display area AA2 are located at different positions on the display panel. The yield of these two areas during LED transfer may differ. The M value of the first color sub-pixel sp1 in the two areas is set to be different. The M value can be set to be larger for the area with poor transfer yield. The first display area AA1 and the second display area AA2 can undergo different number of transfer processes to produce the first color sub-pixel sp1, thereby ensuring that the first color sub-pixel sp1 in both areas can emit light normally.

[0075] Based on the same inventive concept, embodiments of the present invention also provide a display device. Figure 20This is a schematic diagram of a display device provided in an embodiment of the present invention, such as... Figure 20 As shown, the display device includes a display panel 100 provided in any embodiment of the present invention. The structure of the display panel 100 has been described in the above embodiments and will not be repeated here. The display device provided in the embodiments of the present invention can be an electronic device such as a mobile phone, tablet, computer, television, or smart wearable device.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, The display panel includes multiple parallel first lines, each first line including LEDs, and at least one first line including parallel LEDs; And / or, the display panel includes a plurality of LEDs, at least one of the two poles of which are electrically connected to the same electrode with different LEDs respectively.

2. The display panel according to claim 1, characterized in that, The display panel includes multiple sub-pixels. The sub-pixel includes a first color sub-pixel, and the first color sub-pixel includes M parallel-connected first lines. The M first lines include at least one first sub-line, and the first sub-line includes N LEDs connected in series, where M and N are both positive integers, M≥2, and N≥2.

3. The display panel according to claim 2, characterized in that, Each of the M first lines includes at least one second sub-line, and the second sub-line includes only one LED.

4. The display panel according to claim 2, characterized in that, The difference in the number of LEDs contained in any two of the M first lines is less than or equal to 1.

5. The display panel according to claim 2, characterized in that, The first color sub-pixel includes at least one vertical structure LED.

6. The display panel according to claim 5, characterized in that, The display panel includes a connecting line that is directly connected to the vertical structure LED; The display panel includes a substrate, and the connecting line is located on the side of the vertical structure LED away from the substrate. The connecting line is made of a transparent material.

7. The display panel according to claim 2, characterized in that, The sub-pixel includes a first electrode and a second electrode, one of which is connected to a positive power supply voltage and the other to a negative power supply voltage; the first electrodes of each sub-pixel are electrically connected to each other, and the second electrodes of each sub-pixel are isolated from each other; The sub-pixel also includes a second color sub-pixel and a third color sub-pixel, and a first color sub-pixel, a second color sub-pixel and a third color sub-pixel constitute a pixel unit; In the pixel unit, the second electrodes of the three color sub-pixels are arranged along a first direction.

8. The display panel according to claim 7, characterized in that, Along the first direction, the second electrode in the first color sub-pixel and the second electrode in the second color sub-pixel at least partially overlap, and the second electrode in the second color sub-pixel and the second electrode in the third color sub-pixel are aligned.

9. The display panel according to claim 7, characterized in that, Each of the M first lines has an LED that is electrically connected to the second electrode, and the M LEDs that are electrically connected to the second electrode include the first LED; The first color sub-pixel also includes a second LED, and the first LED and the second LED are adjacent in the first direction.

10. The display panel according to claim 9, characterized in that, The first LED and the second LED are connected in series in one of the first sub-circuits; The second electrode and the first electrode of the first color sub-pixel are adjacent in the first direction, and the second LED is electrically connected to the first electrode.

11. The display panel according to claim 10, wherein the first color sub-pixel further includes a third LED, one end of the third LED is electrically connected to the second electrode, and the other end of the third LED and the second LED are connected to the same first electrode; the third LED, the first LED, and the second LED are arranged in a "pin" shape.

12. The display panel according to claim 10, wherein the display panel includes a first power supply line extending in a second direction, the second direction intersects the first direction, and the first electrode is coupled to the first power supply line; the first color sub-pixel further includes a third LED, one end of the third LED is electrically connected to the second electrode; the first electrode of the first color sub-pixel includes a first sub-electrode and a second sub-electrode, the second LED is electrically connected to the first sub-electrode, the first sub-electrode and the second electrode are arranged along the first direction, the other end of the third LED is electrically connected to the second sub-electrode, and a partial line segment of the first power supply line is reused as the second sub-electrode.

13. The display panel according to claim 12, wherein the third LED is a vertical structure LED; the third LED overlaps with the second electrode, or the third LED overlaps with the first power supply line.

14. The display panel according to claim 9, wherein the first LED and the second LED are respectively located in two of the first lines, and the second LED is electrically connected to the second electrode; the first LED is located in one of the first sub-lines, and the first sub-line where the first LED is located further includes a fourth LED, the fourth LED and the first LED are arranged along a second direction, and the second direction intersects the first direction.

15. The display panel according to claim 14, wherein the display panel includes a first power supply line extending in a second direction and an auxiliary power supply line extending in the first direction, the second direction intersects the first direction, the first electrode is coupled to the first power supply line, and at least one end of the auxiliary power supply line is electrically connected to one of the first power supply lines; the first electrode of the first color sub-pixel includes a first sub-electrode and a second sub-electrode, the second LED is electrically connected to the first sub-electrode, and a partial line segment of the auxiliary power supply line is reused as the first sub-electrode; one end of the fourth LED is electrically connected to the second sub-electrode, and a partial line segment of the first power supply line is reused as the second sub-electrode.

16. The display panel according to claim 15, wherein the fourth LED is a vertical structure LED; the fourth LED overlaps with the first power supply line; or, the fourth LED and the first LED are connected in series through a connection electrode, and the fourth LED overlaps with the connection electrode.

17. The display panel according to claim 15, characterized in that, Both the first LED and the fourth LED are vertically oriented LEDs; The first LED overlaps with the second electrode, and the fourth LED overlaps with the auxiliary power line.

18. The display panel according to claim 9, characterized in that, The first LED and the second LED are respectively located in the two first lines; The first color sub-pixel also includes a third LED, which is connected in series with the second LED in a first sub-line, and the third LED is electrically connected to the second electrode; The display panel includes a first power line extending along a second direction and an auxiliary power line extending along the first direction, the second direction intersecting the first direction, the first electrode being coupled to the first power line, and at least one end of the auxiliary power line being electrically connected to one of the first power lines. Both the first LED and the second LED are electrically connected to the first electrode, and a portion of the auxiliary power line is reused as the first electrode.

19. The display panel according to claim 9, characterized in that, The length of the first LED along the first direction is less than its length along the second direction, and the second direction intersects the first direction; The length of the second LED along the first direction is less than its length along the second direction.

20. The display panel according to claim 19, characterized in that, The first color sub-pixel also includes a third LED, the length of which along the first direction is greater than its length along the second direction.

21. The display panel according to claim 9, characterized in that, The display panel includes a pixel circuit, which is electrically connected to the second electrode through a first via. In the first color sub-pixel, the LED that is directly electrically connected to the second electrode does not overlap with the first via.

22. The display panel according to claim 21, characterized in that, The first color sub-pixel further includes a third LED, which is electrically connected to the second electrode; The first via is located on the extension line of the third LED in the first direction, and the first via is located on the extension line of the first LED in the second direction, which intersects the first direction.

23. The display panel according to claim 22, characterized in that, Along the second direction, the first LED and the third LED partially overlap; The length of the overlapping portion of the third LED and the first LED in the first direction is d1, and the length of the overlapping portion of the third LED and the second LED in the first direction is d2, where d1 < d2.

24. The display panel according to claim 22, characterized in that, Along the second direction, the first LED and the third LED partially overlap; Along the second direction, the distance between the first LED and the third LED is d3, and the distance between the second LED and the third LED is d4, where d3 ≥ 10 μm and d4 ≥ 10 μm.

25. The display panel according to claim 7, characterized in that, In the first color sub-pixel: The second electrode extends along a second direction, which intersects the first direction; M LEDs in the first line are arranged along the second direction and electrically connected to the second electrode.

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

27. The display panel according to claim 7, characterized in that, The display panel includes a first power line extending along a second direction and an auxiliary power line extending along the first direction. The first electrode is electrically connected to the first power line. The second direction intersects the first direction. At least one end of the auxiliary power line is electrically connected to the first power line. In the first color sub-pixel: each of the M first lines has an LED electrically connected to the second electrode, each of the M first lines has an LED 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 according to claim 27, characterized in that, The two ends of the auxiliary power line are respectively connected to one of the first power lines.

29. The display panel according to claim 7, characterized in that, The display panel includes multiple first power lines extending along a second direction, the first electrode is electrically connected to the first power lines, and the second direction intersects the first direction; In the first color sub-pixel: each of the M first lines has an LED that is electrically connected to the second electrode, and at least one of the M first lines has an LED that is directly electrically connected to the first power line.

30. The display panel according to claim 7, characterized in that, The pixel unit includes a light-transmitting area and a non-light-transmitting area, and the LED in the first color sub-pixel, the second color sub-pixel and the third color sub-pixel is located in the non-light-transmitting area.

31. The display panel according to claim 7, characterized in that, The second color sub-pixel includes at least two second lines connected in parallel, each second line including an LED; in the second color sub-pixel, the second lines are arranged along the first direction; The third color sub-pixel includes at least two third lines connected in parallel, and each third line includes an LED; in the third color sub-pixel, the third lines are arranged along the first direction.

32. The display panel according to claim 31, characterized in that, In the second color sub-pixel, the length of the LED along the first direction is less than its length along the second direction, and the second direction intersects the first direction; In the third color sub-pixel, the length of the LED along the first direction is less than its length along the second direction.

33. The display panel according to claim 2, characterized in that, The sub-pixel includes a first electrode and a second electrode, wherein the first electrodes of each sub-pixel are electrically connected to each other, and the second electrodes of each sub-pixel are isolated from each other; The display panel further includes a first power line, and the first electrode is electrically connected to the first power line. The first power line, the first electrode, and the second electrode are located on the same layer. The display panel includes a substrate and a pixel circuit located on one side of the substrate. The film layer containing the second electrode is located on the side of the pixel circuit away from the substrate. The LED in the sub-pixel is located on the side of the film layer containing the second electrode away from the pixel circuit. The pixel circuit is electrically connected to the second electrode through a via penetrating the insulating layer.

34. The display panel according to claim 2, characterized in that, The display panel includes a first display area and a second display area, wherein the M value of the first color sub-pixel in the first display area is different from the M value of the first color sub-pixel in the second display area.

35. The display panel according to claim 2, characterized in that, At least two of the M first lines include flip-chip LEDs, and at least one of the first lines including flip-chip LEDs is the first sub-line.

36. A display panel, characterized in that, The display panel has a plurality of LEDs, wherein at least some of the LEDs are connected in parallel and at least some of the LEDs are connected in series.

37. The display panel according to claim 36, characterized in that, The display panel includes multiple sub-pixels. The sub-pixel includes a first color sub-pixel, and the first color sub-pixel includes M first lines connected in parallel. The M first lines include at least one first sub-line, and the first sub-line includes N LEDs connected in series, where M and N are both positive integers, M≥2, and N≥2.

38. The display panel according to claim 37, characterized in that, Each of the M first lines includes at least one second sub-line, and the second sub-line includes only one LED.

39. The display panel according to claim 36, characterized in that, At least one of the LEDs is connected in series with another LED, and the LED connected in series is simultaneously connected in parallel with at least another LED.

40. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 39.

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