Light emitting diode, driving method thereof and display panel

Abstract

The invention discloses a light emitting diode, a driving method thereof and a display panel, and relates to the technical field of display. The light emitting diode comprises a substrate, a first semiconductor layer, an electron hole recombination layer, a first current diffusion layer, a first electrode, a second semiconductor layer, a second current diffusion layer and a second electrode, wherein the first semiconductor layer is arranged on the substrate; the electron hole composite layer is arranged on the first semiconductor layer; the first current diffusion layer is arranged on the first semiconductor layer; the first electrode is arranged on the first current diffusion layer; the second semiconductor layer is arranged on the electron hole composite layer; the second current diffusion layers are arranged on the second semiconductor layer, the number of the second current diffusion layers is multiple, and the multiple second current diffusion layers are arranged at intervals; the second electrode is arranged on the second current diffusion layer; wherein the number of the second electrodes is the same as that of the second current diffusion layers; according to the light-emitting diode, the plurality of second electrodes are arranged, so that stable output of relatively low current and relatively high current is realized.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a light emitting diode and a driving method thereof, and a display panel. Background Art

[0002] MicroLED (Micro Light Emitting Diode Display) and MiniLED (Mini Light Emitting Diode Display) have the advantages of high brightness, high contrast, high color gamut, high resolution, fast response time, energy saving and low power consumption, and are considered to be the new direction of display revolution technology.

[0003] During display, the area of ​​the current diffusion layer in MicroLED or MiniLED is generally the same as the area of ​​the previous film layer (the current diffusion layer has a large area), or the same as the area of ​​the electrode layer (the current diffusion layer has a small area). However, because the current control accuracy of MicroLED is very high, when facing a screen that requires a smaller current output, if the area of ​​the current diffusion layer is large, the impedance of the current diffusion layer will be small, and it will not be able to play a role in blocking the voltage division, and thus it will not be able to stably provide a smaller current, which will result in poor display effect. Although a small-area current diffusion layer can stably provide a small current to solve this problem, when facing a screen that requires a larger current output, the small-area current diffusion layer will have a large impedance, which will cause serious voltage division and fail to provide a stable large current. This will result in excessive current and cause Mura on the display. Therefore, there is an urgent need for a light-emitting diode structure that can perform stable current control. Summary of the invention

[0004] The purpose of the present application is to provide a light emitting diode, a driving method thereof and a display device, which can achieve stable output of smaller current and larger current by setting a plurality of second electrodes.

[0005] The present application discloses a light-emitting diode, which includes a substrate, a first semiconductor layer, an electron-hole recombination layer, a first current diffusion layer, a first electrode, a second semiconductor layer, a second current diffusion layer, and a second electrode, wherein the first semiconductor layer is arranged on the substrate; the electron-hole recombination layer is arranged on the first semiconductor layer; the first current diffusion layer is arranged on the first semiconductor layer; the first electrode is arranged on the first current diffusion layer; the second semiconductor layer is arranged on the electron-hole recombination layer; the second current diffusion layer is arranged on the second semiconductor layer, and a plurality of the second current diffusion layers are arranged with spacing between them; the second electrode is arranged on the second current diffusion layer; wherein the number of the second electrodes is the same as the number of the second current diffusion layers. Optionally, a plurality of the first electrodes are arranged, and a plurality of the first current diffusion layers are also arranged corresponding to the first electrodes.

[0006] Optionally, the first electrode is provided with a first current diffusion layer covering the area of ​​the first semiconductor layer not blocked by the electron-hole recombination layer; wherein the first current diffusion layer is spaced apart from the electron-hole recombination layer.

[0007] Optionally, each of the second electrodes is provided with a power signal line for power supply.

[0008] Optionally, the voltage values ​​of the plurality of second electrodes are the same; / or,

[0009] The plurality of second electrodes are respectively supplied with different voltage values.

[0010] Optionally, the first current diffusion layer and the second current diffusion layer are both made of metal or ITO. Optionally, there are five second current diffusion layers, which are respectively arranged at the four corners and the center of the second semiconductor layer, and there are five second electrodes, which are respectively arranged on the five second current diffusion layers; wherein the voltage value of the second electrode at the center is lower than the voltage value of the second electrode at the four corners.

[0011] The present application also discloses a method for driving a light emitting diode, which is applied to the light emitting diode as described above, and comprises the steps of:

[0012] determining the number of second electrodes in a light emitting diode;

[0013] According to the current required by the light-emitting diode, the number of second electrodes that need to be turned on is determined;

[0014] Turn on a corresponding number of second electrodes according to the number of electrodes that need to be turned on;

[0015] The magnitude of the current turned on by each of the second electrodes is the same or different.

[0016] Optionally, the step of turning on a corresponding number of second electrodes according to the number of electrodes to be turned on includes:

[0017] comparing the number of the second electrodes that need to be turned on with the actual number of the second electrodes;

[0018] turning on the second electrode according to the comparison result;

[0019] When the number of second electrodes required to be turned on is less than the maximum value, the positions of the second electrodes turned on randomly change; when the number of second electrodes required to be turned on is equal to the maximum value, all the second electrodes are turned on simultaneously. The present application also discloses a display panel, the display panel comprising a carrier substrate and a plurality of light emitting diodes as described above, the light emitting diode array being arranged on the carrier substrate.

[0020] The light-emitting diode of the present application is configured with a plurality of second electrodes, and a single or multiple second electrodes are selected to supply power simultaneously according to the current. This not only enables stable output of a relatively small current to ensure a stable display effect of the picture, but also enables stable output of a relatively large current to avoid display Mura problems caused by excessive current. This enables stable output of both relatively small and relatively large currents, thereby improving the yield of the display picture and enhancing product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 is a front view structural schematic diagram of a light emitting diode according to the first embodiment of the present application;

[0023] Figure 2 is a schematic diagram of a top view structure of a light emitting diode according to the first embodiment of the present application;

[0024] Figure 3 is a schematic top view of another structure of a light emitting diode according to the first embodiment of the present application;

[0025] Figure 4 is a schematic diagram of a top view structure of a light emitting diode according to a second embodiment of the present application;

[0026] Figure 5 is a schematic structural diagram of a light emitting diode according to the third embodiment of the present application;

[0027] Figure 6 is a step flow chart of a method for driving a light emitting diode according to a fourth embodiment of the present application;

[0028] Figure 7 is a step flow chart of a method for driving a light emitting diode according to a fourth embodiment of the present application;

[0029] Figure 8 This is a timing diagram of starting the second electrode at a random position in a method for driving a light emitting diode according to a fourth embodiment of the present application;

[0030] Fig. 9 This is a timing diagram of starting the second electrode at a fixed position in a method for driving a light emitting diode according to a fourth embodiment of the present application;

[0031] Fig.10 It is a structural schematic diagram of a display panel of the fifth embodiment of the present application.

[0032] Among them, 100, light-emitting diode; 110, substrate; 120, first semiconductor layer; 130, electron-hole recombination layer; 140, first current diffusion layer; 150, first electrode; 160, second semiconductor layer; 170, second current diffusion layer; 180, second electrode; 190, detection unit; 200, supporting substrate; 300, display panel. DETAILED DESCRIPTION

[0033] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0034] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "plurality" means two or more. The term "including" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may exist or be added.

[0035] In addition, terms indicating orientation or positional relationships, such as “center,” “lateral,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside,” are described based on the orientation or relative positional relationships shown in the accompanying drawings and are merely simplified descriptions for the convenience of describing the present application. They do not indicate that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present application.

[0036] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] The present application is described in detail below with reference to the accompanying drawings and optional embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0038] like Figure 1 and Figure 3As shown, as the first embodiment of the present application, a light-emitting diode 100 is disclosed, which is applied to a display panel. The light-emitting diode 100 includes a substrate 110, a first semiconductor layer 120, an electron-hole recombination layer 130, a first current diffusion layer 140, a first electrode 150, a second semiconductor layer 160, a second current diffusion layer 170 and a second electrode 180. The first semiconductor layer 120 is arranged on the substrate 110; the electron-hole recombination layer 130 is arranged on the first semiconductor layer 120; the first current diffusion layer 140 is arranged on the first semiconductor layer 120; the first electrode 150 is arranged on the first current diffusion layer 140; the second semiconductor layer 160 is arranged on the electron-hole recombination layer 130; the second current diffusion layer 170 is arranged on the second semiconductor layer 160, and a plurality of second current diffusion layers 170 are provided, and the plurality of second current diffusion layers 170 are arranged at intervals from each other; the second electrode 180 is arranged on the second current diffusion layer 170; wherein the number of the second electrodes 180 is the same as the number of the second current diffusion layers 170. It can be understood that the first electrode 150 is an N-type electrode, the second electrode 180 is a P-type electrode, the first semiconductor layer 120 is an N-type semiconductor layer, and the second semiconductor layer 160 is a P-type semiconductor layer. Of course, the polarities of the first electrode 150 and the second electrode 180 can also be set oppositely, and the polarities of the first semiconductor layer 120 and the second semiconductor layer 160 can also be set oppositely. It is only necessary to maintain the polarity of the first electrode 150 the same as that of the first semiconductor layer 120, and the polarity of the second electrode 180 the same as that of the second semiconductor layer 160. Designers can choose the design according to actual conditions.

[0039] The light-emitting diode 100 of this embodiment, when the display screen needs to control the second electrode 180 to input a small current or a large current to the electron-hole recombination layer 130 to make it emit light, can select a single or multiple second electrodes 180 to supply power simultaneously according to the magnitude of the current. When it is a small current, only one second electrode 180 can be supplied to the electron-hole recombination layer 130 to stably provide a small current, and when it is a large current, multiple second electrodes 180 can be controlled to supply power to the electron-hole recombination layer 130 simultaneously to stably provide a large current. When multiple second electrodes 180 supply power simultaneously to combine to form a large current, multiple second electrodes 180 can be combined with each other to form the required large current, so that when facing a screen that requires a large current output, It is still possible to stably provide a large current to the electron-hole recombination layer 130 to ensure a stable display of the display screen, avoiding the display Mura problem caused by the inability to provide a stable large current due to the large impedance of the current diffusion layer with a small area. Compared with the existing light-emitting diode 100 design, the light-emitting diode 100 of the present application, by setting the second electrode 180 to be multiple, selects a single or multiple second electrodes 180 to supply power at the same time according to the current size, which can not only achieve a stable output of a smaller current to ensure a stable display effect of the screen, but also can cope with a stable output of a larger current to avoid the display Mura problem caused by excessive current, and can simultaneously achieve a stable output of a smaller current and a larger current, thereby improving the yield of the display screen and improving the competitiveness of the product. It should be noted that the light-emitting diode 100 can be any one of a red light-emitting diode 100, a green light-emitting diode 100 or a blue light-emitting diode 100; the areas of the multiple second electrodes 180 are equal, and the areas of the multiple second current diffusion layers 170 are equal.

[0040] In this embodiment, four second electrodes 180 are provided, and four second current diffusion layers 170 are also provided. The four second electrodes 180 and the four second current diffusion layers 170 are evenly distributed on the second semiconductor layer 160. A second electrode 180 and a second current diffusion layer 170 connected thereto are formed into a group. A light emitting diode 100 is provided with four groups in total, and the four second electrodes 180 and the four second current diffusion layers 170 are evenly distributed on the second semiconductor layer 160. The four second electrodes 180 and the four second current diffusion layers 170 are arranged at intervals from each other. In this way, each group of the second electrodes 180 and the second current diffusion layers 170 do not interfere with each other, and the four second electrodes 180 and the four second current diffusion layers 170 are arranged at intervals from each other. The gaps between the second current diffusion layers 170 are conducive to heat dissipation, and can enhance the heat dissipation capacity of the light-emitting diode 100 to a certain extent; of course, the second electrodes 180 and the second current diffusion layers 170 in the light-emitting diode 100 of the present application are not limited to four, but can also be set to other numbers, and designers can choose to design according to actual needs; the consideration for setting four second electrodes 180 and four second current diffusion layers 170 in the present embodiment is that the light-emitting diode 100 is set as a rectangular structure. After dividing the rectangle into the smallest equal parts as much as possible, considering the difficulty of setting the control signal for controlling multiple second electrodes 180, the inventor of the present application sets the second electrode 180 and the second current diffusion layer 170 to four under the above comprehensive considerations.

[0041] Of course, five second electrodes 180 and second current diffusion layers 170 may also be provided, such as Figure 2 As shown, five second current diffusion layers 170 are respectively arranged at the four corners and the center of the second semiconductor layer 160, and five second electrodes 180 are respectively arranged on the five second current diffusion layers 170. The consideration of such design is to reduce the leakage at the edge of the light-emitting diode 100. When working, the voltage value of the second electrode 180 at the center position is lower than the voltage value of the second electrode 180 at the four corners, so that the electrons at the periphery have an inward electric field, and the electrons can move from the inside to the top, so that the movement of electrons has a restraining effect, thereby reducing the leakage at the edge of the LED.

[0042] In this embodiment, each second electrode 180 is provided with a power signal line for power supply, so that when displaying, each second electrode 180 can control the output of currents with different voltages to supply the second semiconductor layer 160, thereby realizing fine control of the current in the display panel; when displaying, the voltage values ​​of multiple second electrodes 180 can be controlled to be the same or the multiple second electrodes 180 can be controlled to supply different voltage values ​​respectively according to different display images, so as to achieve precise control of the turn-on voltage and display current of the light-emitting diode 100; for example, when the display image requires a current of fifty milliamperes, the two second electrodes 180 can be controlled to work simultaneously, and the display current of the light-emitting diode 100 can be controlled to be the same or ... Ideally, two second electrodes 180 simultaneously outputting a current of 25 mA can meet the needs of the display screen. However, in reality, due to signal interference or differences between electrodes, the actual current output by each second electrode 180 may not reach the ideal state. Therefore, according to actual conditions, one second electrode 180 can be controlled to output 30 mA and the other second electrode 180 can be controlled to output 25 mA to offset the difference caused by signal interference or differences between electrodes, which makes the current unable to meet the needs of the display screen. Of course, the above situation is only an example. In specific situations, designers can design the control of the output of the second electrode 180 according to actual conditions.

[0043] like Figure 3 As shown, the first electrode 150 is provided with a first current diffusion layer 140 covering the area of ​​the first semiconductor layer 120 that is not blocked by the electron-hole recombination layer 130, and the first current diffusion layer 140 is spaced apart from the electron-hole recombination layer 130 to prevent the current output from the first electrode 150 to the first current diffusion layer 140 from being directly input into the electron-hole recombination layer 130 by the first circuit diffusion layer, and the first electrode 150 is arranged on the central area of ​​the first current diffusion layer 140, which is beneficial to the diffusion of the current output by the first electrode 150 in the first current diffusion layer 140 to a certain extent, and also facilitates the heat dissipation of the first electrode 150 during operation. During operation, the first electrode 150 can always set a relatively large and uniform current, and the second electrode 180 provides the same or different voltages to the second electrodes 180 at different positions as needed, so as to achieve precise control of the turn-on voltage and display current of the light-emitting diode 100. Moreover, only one first electrode 150 is provided, and only one power signal line is required to control the current of the first electrode 150, which reduces the difficulty of setting the light-emitting diode 100 and the difficulty of controlling the current of the first electrode 150. It can be understood that the first current diffusion layer 140 and the second current diffusion layer 170 are both made of metal or conductive oxide layer (ITO).

[0044] like Figure 4As shown, as the second embodiment of the present application, which is a further improvement of the first embodiment of the present application, a light-emitting diode 100 is disclosed, wherein a plurality of first electrodes 150 are provided, a plurality of first current diffusion layers 140 are provided corresponding to the first electrodes 150, and a plurality of power signal lines of the first electrode 150 are provided correspondingly, so as to realize accurate control of the current magnitude of the first electrode 150. In the light-emitting diode 100 of this embodiment, not only a plurality of second electrodes 180 are provided, but also a plurality of first electrodes 150 are provided. Both the first electrode 150 and the second electrode 180 can realize accurate control of the input current magnitude. Compared with the light-emitting diode 100 of the above embodiment, the turn-on voltage and display current of the light-emitting diode 100 can be controlled more accurately, and it is suitable for display panels with higher requirements for current control accuracy. The light-emitting diode 100 of the present application can not only realize stable output of a relatively small current to stabilize the display effect of the picture, but also can cope with stable output of a relatively large current to avoid display Mura problems due to excessive current, and can realize stable output of a relatively small current and a relatively large current at the same time, thereby improving the yield of the display picture and improving product competitiveness.

[0045] like Figure 5 As shown, as the third embodiment of the present application, a light-emitting diode 100 is disclosed, and the light-emitting diode 100 also includes a detection unit 190, and the detection unit 190 is connected to the second electrode 180 to detect whether the second electrode 180 is an abnormal electrode (the abnormal electrode refers to an electrode that cannot work normally). The light-emitting diode 100 of this embodiment detects the second electrode 180 by setting the detection unit 190. When the second electrode 180 is an abnormal electrode, the second electrode 180 is marked as an abnormal electrode. When the light-emitting diode 100 is working, the second electrode 180 other than the abnormal electrode is used to output current to the electron-hole recombination layer 130 to avoid display problems caused by deviations in the magnitude of the current input from the second electrode 180 to the electron-hole recombination layer 130 due to damage or abnormality of the second electrode 180; and the detection unit 190 can detect the abnormal second electrode 180, even if part of the second electrode 180 is abnormal or damaged, the display device using the light-emitting diode 100 can continue to display normally, which extends the service life of the light-emitting diode 100 to a certain extent.

[0046] like Figure 6 As shown, as a fourth embodiment of the present application, a method for driving a light emitting diode is disclosed, which is applied to the light emitting diode described in the above embodiment. The method for driving a light emitting diode comprises the steps of:

[0047] determining the number of second electrodes in a light emitting diode;

[0048] Specifically, it is the number of all second electrodes in a light-emitting diode, and may also be the number of effective second electrodes;

[0049] According to the current required by the light-emitting diode, the number of second electrodes that need to be turned on is determined;

[0050] Specifically, the number of the second electrodes is determined according to the current required by the light emitting diode. The smaller the current, the fewer the second electrodes are activated, and the larger the current, the more the second electrodes are activated.

[0051] Turn on a corresponding number of second electrodes according to the number of electrodes that need to be turned on;

[0052] The magnitude of the current opened by each of the second electrodes may be the same magnitude or different magnitudes.

[0053] The driving method of the light-emitting diode of the present application determines the number of second electrodes that need to be turned on according to the current required by the light-emitting diode and turns on the corresponding number of second electrodes. This not only can achieve stable output of a relatively small current to stabilize the display effect of the picture, but also can output current together by multiple second electrodes to cope with the stable output of a relatively large current to avoid the display Mura problem caused by excessive current. In general, the driving method of the light-emitting diode can simultaneously achieve stable output of a relatively small current and a relatively large current, thereby improving the yield of the display picture and enhancing the competitiveness of the display product.

[0054] Further, such as Figure 7 As shown, the step of opening a corresponding number of second electrodes according to the number of electrodes to be opened includes:

[0055] comparing the number of the second electrodes that need to be turned on with the actual number of the second electrodes;

[0056] turning on the second electrode according to the comparison result;

[0057] When the number of second electrodes required to be turned on is less than the maximum value, the positions at which the second electrodes are turned on are randomly changed; when the number of second electrodes required to be turned on is equal to the maximum value, all the second electrodes are turned on at the same time.

[0058] By the above-mentioned driving method, when the second electrode is turned on, after the number of the turned-on second electrodes is determined, the positions of the turned-on second electrodes are randomly changed, so that some of the second electrodes can have a non-working period, which delays the aging of the second electrode switch to a certain extent, so as to extend the life of the corresponding thin film transistor (TFT) switch, and the TFT switch can avoid working for a long time to prevent the current output by the semiconductor in the TFT switch from increasing or decreasing, thereby reducing the current drift and strengthening the current control of the light-emitting diode; wherein, in the above-mentioned driving method, the timing diagram of the second electrode turning on can be as follows Figure 8 As shown, at this time, the second electrode is randomly turned on, and the timing diagram of the second electrode is fixedly turned on as shown in Fig. 9 As shown, P1, P2, P3 and P4 represent four second electrodes respectively.

[0059] like Fig.10 As shown, as the fifth embodiment of the present application, a display panel 300 is disclosed, wherein the display panel 300 includes a carrier substrate 200 and a plurality of light-emitting diodes 100 as described in the above embodiments, wherein the light-emitting diodes 100 are arranged in an array on the carrier substrate 200. The light-emitting diodes 100 of the display panel of this embodiment can not only achieve a stable output of a relatively small current to stabilize the display effect of the picture, but can also cope with a stable output of a relatively large current to avoid display Mura problems caused by excessive current, and can simultaneously achieve a stable output of a relatively small current and a relatively large current, thereby improving the yield of the display picture and enhancing product competitiveness.

[0060] It should be noted that the limitations on the various steps involved in this solution, without affecting the implementation of the specific solution, are not deemed to limit the order of the steps. The steps written in front can be executed first, or later, or even simultaneously. As long as this solution can be implemented, it should be deemed to fall within the scope of protection of this application.

[0061] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0062] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A light emitting diode, characterized in that: The light emitting diode comprises: substrate; A first semiconductor layer, disposed on the substrate; An electron-hole recombination layer is disposed on the first semiconductor layer; A first current diffusion layer, disposed on the first semiconductor layer; A first electrode, disposed on the first current diffusion layer; A second semiconductor layer is disposed on the electron-hole recombination layer; a second current diffusion layer, disposed on the second semiconductor layer, wherein a plurality of the second current diffusion layers are provided, and the plurality of the second current diffusion layers are spaced apart from each other; and A second electrode is disposed on the second current diffusion layer; The number of the second electrodes is the same as the number of the second current diffusion layers.

2. The light emitting diode according to claim 1, characterized in that: There are a plurality of the first electrodes, and there are a plurality of the first current diffusion layers corresponding to the first electrodes.

3. The light emitting diode according to claim 1, characterized in that: The first electrode is provided with a first current diffusion layer covering the area of ​​the first semiconductor layer not blocked by the electron-hole recombination layer; wherein the first current diffusion layer is spaced apart from the electron-hole recombination layer.

4. The light emitting diode according to claim 1, characterized in that: Each of the second electrodes is provided with a power signal line for power supply.

5. The light emitting diode according to claim 4, characterized in that: The voltage values ​​of the plurality of second electrodes are the same; / or, The plurality of second electrodes are respectively supplied with different voltage values.

6. The light emitting diode according to claim 1, characterized in that: The first current diffusion layer and the second current diffusion layer are both made of metal or ITO.

7. The light emitting diode according to claim 1, characterized in that: There are five second current diffusion layers, which are respectively arranged at the four corners and the center of the second semiconductor layer; there are five second electrodes, which are respectively arranged on the five second current diffusion layers; The voltage value of the second electrode located at the center is lower than the voltage values ​​of the second electrodes located at the four corners.

8. A method for driving a light emitting diode, applied to the light emitting diode according to any one of claims 1 to 7, characterized in that: Includes steps: determining the number of second electrodes in a light emitting diode; According to the current required by the light-emitting diode, the number of second electrodes that need to be turned on is determined; Turn on a corresponding number of second electrodes according to the number of electrodes that need to be turned on; The magnitude of the current turned on by each of the second electrodes is the same or different.

9. The driving method according to claim 8, characterized in that: The step of opening a corresponding number of second electrodes according to the number of electrodes to be opened comprises: comparing the number of the second electrodes that need to be turned on with the actual number of the second electrodes; turning on the second electrode according to the comparison result; When the number of second electrodes required to be turned on is less than the maximum value, the positions where the second electrodes are turned on are randomly changed; when the number of second electrodes required to be turned on is equal to the maximum value, all the second electrodes are turned on at the same time.

10. A display panel, characterized in that: It comprises a carrier substrate and a plurality of light emitting diodes as claimed in any one of claims 1 to 7, wherein the light emitting diode array is arranged on the carrier substrate.

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