Light-emitting panel and display device

Abstract

This application provides a light-emitting panel and a display device. The light-emitting panel includes a substrate and Q target-color light-emitting elements of the same color located on the substrate. The wavelength range of the light emitted by the Q target-color light-emitting elements is divided into M bands, where Q and M are both positive integers. The light-emitting panel includes N partitions, each partition containing at least one target-color light-emitting element, where N ≥ M, and both N and M are greater than or equal to 2. The wavelengths of the light emitted by the target-color light-emitting elements in at least M partitions are respectively in the M bands, with each partition corresponding to one band, and the wavelengths of the light emitted by the target-color light-emitting elements in the same partition are all in the same band. This application can improve or even eliminate the problems of uneven brightness and / or uneven color of the light-emitting panel.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular, relates to a light-emitting panel and a display device. Background Art

[0002] With the development of display technology, the types of light-emitting panels are becoming more and more extensive. For example, the types of light-emitting panels may include light-emitting diode (LED) light-emitting panels, sub-millimeter light-emitting diode (Mini LED) light-emitting panels, and micro light-emitting diode (Micro LED) light-emitting panels.

[0003] The inventors of this application have discovered that LED light-emitting panels, Mini LED light-emitting panels and Micro LED light-emitting panels have problems of uneven brightness and / or uneven color when emitting light / displaying. Summary of the invention

[0004] The embodiments of the present application provide a light-emitting panel and a display device, which can improve or even eliminate the problem of uneven brightness and / or uneven color of the light-emitting panel.

[0005] In a first aspect, an embodiment of the present application provides a light-emitting panel, which includes a substrate and Q target color light-emitting elements of the same color located on the substrate, the wavelength range of light emitted by the Q target color light-emitting elements is divided into M bands, and Q and M are both positive integers; the light-emitting panel includes N partitions, each partition is distributed with at least one target color light-emitting element, N≥M, and N and M are both greater than or equal to 2; the wavelengths of light emitted by the target color light-emitting elements in at least M partitions are in M ​​bands respectively, each partition corresponds to a band, and the wavelengths of light emitted by the target color light-emitting elements in the same partition are all in the same band.

[0006] In a second aspect, an embodiment of the present application provides a display device, the display device comprising a light-emitting panel as provided in the first aspect.

[0007] The light-emitting panel and display device of the embodiment of the present application, the light-emitting panel includes a substrate and Q target color light-emitting elements of the same color located on the substrate, the wavelength range of the light emitted by the Q target color light-emitting elements is divided into M bands, Q and M are both positive integers; the light-emitting panel includes N partitions, each partition is distributed with at least one target color light-emitting element, N ≥ M; the wavelengths of the light emitted by the target color light-emitting elements in at least M partitions are respectively in M ​​bands, and the wavelengths of the light emitted by the target color light-emitting elements in the same partition are all in the same band. Since the wavelengths of the light emitted by the target color light-emitting elements in each partition are all in the same band, at least the brightness of each partition can be guaranteed to be uniform and uniform, thereby improving or even eliminating the problem of uneven brightness and / or uneven color of the light-emitting panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0009] Figure 1 is a schematic top view of a light emitting panel;

[0010] Figure 2 A schematic top view of a light-emitting panel provided in an embodiment of the present application;

[0011] Figure 3 Another schematic top view of the light-emitting panel provided in the embodiment of the present application;

[0012] Figure 4 A cross-sectional schematic diagram of a light-emitting panel provided in an embodiment of the present application;

[0013] Figure 5a Another cross-sectional schematic diagram of the light-emitting panel provided in an embodiment of the present application;

[0014] Figure 5b A further cross-sectional schematic diagram of a light-emitting panel provided in an embodiment of the present application;

[0015] Figure 6 A cross-sectional schematic diagram of a color conversion unit in a light-emitting panel provided in an embodiment of the present application;

[0016] Figure 7 Another cross-sectional schematic diagram of a color conversion unit in a light-emitting panel provided in an embodiment of the present application;

[0017] Figure 8 A schematic top view of another type of light-emitting panel provided in an embodiment of the present application;

[0018] Fig. 9 A schematic diagram of the structure of a light-emitting panel provided in an embodiment of the present application;

[0019] Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0020] Fig.11 Another schematic diagram of the structure of the display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0023] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] In the embodiments of the present application, the term “electrically connected” may refer to a direct electrical connection between two components, or may refer to an electrical connection between two components via one or more other components.

[0025] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0026] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the prior art:

[0027] As mentioned above, the inventors of the present application have discovered that the light-emitting panel in the related art has the problem of uneven brightness and / or uneven color.

[0028] In order to solve the problem of uneven brightness and / or uneven color of the light-emitting panel, the inventor of the present application first studied and analyzed the root causes of the above technical problems. The specific research and analysis process is as follows:

[0029] The inventor of this application discovered that Figure 1 As shown, for LED light-emitting panels, Mini LED light-emitting panels and Micro LED light-emitting panels, the light-emitting panel 10' includes a plurality of light-emitting elements 101', and the light-emitting elements 101' may be, for example, LED chips. Due to production process errors or different materials, different manufacturers, etc., the wavelengths of light emitted by multiple light-emitting elements 101' of the same color in the light-emitting panel 10' may be different, for example, spanning multiple bands. In the related art, when transferring multiple light-emitting elements 101' to the substrate 102' of the light-emitting panel 10', the band in which the light-emitting element 101' is located is usually not considered, but the light-emitting elements 101' of the same color and different bands are mixed together, and then transferred to the substrate 102' of the light-emitting panel 10', that is, the light-emitting elements 101' of the same color and different bands are mixed together on the substrate 102' and arranged in disorder. After a large number of experiments and on-site measurements, the inventors found that when light-emitting elements 101' (of the same color) of different bands are mixed together, due to the different wavelengths of light emitted by the light-emitting elements 101' of different bands, when the light-emitting panel 10' emits light / displays, there will be differences in brightness and / or chromaticity between different areas in the light-emitting panel 10', that is, problems of uneven brightness and / or uneven chromaticity will occur.

[0030] In view of the above research findings of the inventors, the embodiments of the present application provide a light-emitting panel and a display device, which can solve the technical problems of uneven brightness and / or uneven chromaticity of the light-emitting panel existing in the related art.

[0031] The technical concept of the embodiment of the present application is to respectively arrange the target color light emitting elements with wavelengths in M ​​bands in at least M partitions of the light emitting panel, and arrange the target color light emitting elements with wavelengths in the same band in the same partition. In this way, since the wavelengths of light emitted by the target color light emitting elements in each partition are in the same band, at least the brightness and chromaticity of each partition can be guaranteed to be uniform, thereby improving or even eliminating the problem of uneven brightness and / or uneven chromaticity of the light emitting panel.

[0032] The following first introduces the light-emitting panel provided in the embodiment of the present application.

[0033] like Figure 2As shown, the light-emitting panel 20 provided in the embodiment of the present application includes a substrate 201 and Q target color light-emitting elements 202 of the same color located on the substrate 201. The wavelength range of the light emitted by the Q target color light-emitting elements 202 is divided into M bands, and Q and M are both positive integers. Among them, the band can also be understood as the range of wavelengths. Usually, a smaller wavelength range is called a band, such as one of the bands is 457.5nm~459nm, and nm represents nanometers. For example, for example, the wavelength range of the light emitted by the Q target color light-emitting elements 202 is 457.5nm~465nm, that is, the length of the wavelength range is 7.5nm. Then, assuming that every 1.5nm is a band, the wavelength range of the light emitted by the Q target color light-emitting elements 202 can be divided into 5 bands, namely 457.5nm~459nm, 459nm~460.5nm, 460.5nm~462nm, 462nm~463.5nm and 463.5nm~465nm.

[0034] It should be noted that the length of the band can be flexibly adjusted according to actual conditions. For example, the length of the band can be 1.5nm, or it can be 1nm, 2nm or other lengths. The embodiments of the present application do not limit this, but it is necessary to ensure that the light emitted by the target color light-emitting element 202 in the same band meets the requirements of uniform brightness and / or uniform color.

[0035] In the embodiment of the present application, the substrate 201 may be a rigid substrate or a flexible substrate. For example, the rigid substrate includes but is not limited to a glass substrate, a plastic substrate, a quartz substrate or a sapphire substrate, and for example, the flexible substrate includes but is not limited to a polyimide material (PI) or a polyethylene terephthalate material (PET), which is not limited in the embodiment of the present application.

[0036] The target color light-emitting element 202 and the non-target color light-emitting elements described below may specifically include LED chips. LED chips include but are not limited to mini LED chips or micro LED chips. Mini LED is also known as sub-millimeter light-emitting diode, which means an LED with a grain size of approximately 100 microns to 1000 microns. When mini LED is used to form the light-emitting panel provided in the embodiment of the present application, the yield is high and it has special-shaped cutting characteristics. It can also form a high-curved backlight form with a flexible substrate and has better color rendering. Micro LED is generally an LED with a grain size of approximately 1-10 microns. Micro LED has self-luminous display characteristics. Its advantages include full solid state, long life, high brightness, low power consumption, small size, ultra-high resolution, and can be used in extreme environments such as high temperature or radiation. It can realize a display screen with pixel particles of 0.05 mm or smaller. Micro LED has very low power consumption, better material stability and no image retention.

[0037] It should be noted that, in some embodiments, the substrate 201 may be provided with only one color of target color light emitting element 202, without providing non-target color light emitting elements of other colors. Among them, the target color light emitting element 202 may be a blue light emitting element, a red light emitting element, a green light emitting element, a white light emitting element, or a light emitting element of other colors. Taking the target color light emitting element 202 as a blue light emitting element as an example, in some embodiments, the substrate 201 may only have a blue light emitting element, without providing non-target color light emitting elements of other colors (such as a red light emitting element and a green light emitting element).

[0038] However, in other embodiments, in addition to the target color light-emitting element 202, non-target color light-emitting elements of other colors may be arranged on the substrate 201. That is, the substrate 201 has both the target color light-emitting element 202 and the non-target color light-emitting element. Exemplarily, the target color light-emitting element 202 may be a blue light-emitting element, and the non-target color light-emitting element may be a light-emitting element of other colors other than the blue light-emitting element, such as a red light-emitting element and a green light-emitting element. Alternatively, the target color light-emitting element 202 may be a red light-emitting element, and the non-target color light-emitting element may be a light-emitting element of other colors other than the red light-emitting element, such as a blue light-emitting element and a green light-emitting element. Alternatively, the target color light-emitting element 202 may be a green light-emitting element, and the non-target color light-emitting element may be a light-emitting element of other colors other than the green light-emitting element, such as a red light-emitting element and a blue light-emitting element. When the light-emitting elements are arranged according to different band partitions, the wavelength of the non-target color light-emitting element may be made quantitative, and only the wavelength of the target color light-emitting element 202 may be a variable. In simple terms, when there are both target color light emitting elements 202 and non-target color light emitting elements on the substrate 201, the light emitted by the multiple target color light emitting elements 202 can be in multiple bands, but the light emitted by the light emitting elements of the same color in the non-target color light emitting elements can be in the same band. When arranging the light emitting elements in the partition, only the target color light emitting elements 202 can be considered, which is conducive to uniform brightness adjustment and chromaticity uniformity adjustment.

[0039] Taking the target color light-emitting element 202 as a blue light-emitting element and the non-target color light-emitting elements as red light-emitting elements and green light-emitting elements as an example, when there are both blue light-emitting elements and red light-emitting elements and green light-emitting elements on the substrate 201, the light emitted by the multiple blue light-emitting elements can be in multiple bands, and the light emitted by the multiple red light-emitting elements on the substrate 201 can be in the same band, and the light emitted by the multiple green light-emitting elements on the substrate 201 can be in the same band.

[0040] Continue to see Figure 2, the light-emitting panel 20 includes N partitions 20A, each partition 20A is distributed with at least one target color light-emitting element 202, N ≥ M, and both N and M are greater than or equal to 2. It should be noted that in order to better improve the problem of uniform brightness and uniform brightness of each partition 20A, optionally, two or more target color light-emitting elements 202 can be distributed in each partition 20A. It is worth noting that in the embodiment of the present application, the wavelengths of light emitted by the target color light-emitting elements 202 in at least M partitions 20A are respectively in M ​​bands, each partition 20A corresponds to a band, and the wavelengths of light emitted by the target color light-emitting elements 202 in the same partition 20A are all in the same band. That is, the target color light-emitting elements 202 with wavelengths in different bands are located in different partitions 20A, and the wavelengths of the target color light-emitting elements 202 in the same partition 20A are in the same band. For example, in some embodiments, N=M, that is, the light-emitting panel 20 includes M partitions 20A, and the wavelength range of the light emitted by the Q target color light-emitting elements 202 on the substrate 201 is divided into M bands. Then, the target color light-emitting elements 202 with wavelengths in the M bands can be respectively located in the M partitions 20A, such as the target color light-emitting elements 202 of the first band are located in the first partition 20A, the target color light-emitting elements 202 of the second band are located in the second partition 20A, and so on, the target color light-emitting elements 202 of the Mth band are located in the Mth partition 20A. For example, in other embodiments, N>M, that is, when the number of partitions in the light-emitting panel 20 is greater than the number of bands divided by the target color light-emitting elements 202, there may be a situation where two or more partitions 20A use target color light-emitting elements 202 of the same band, such as the target color light-emitting element 202 of the first band can be located in both the first partition 20A and the second partition 20A.

[0041] In the light-emitting panel 20 provided in the embodiment of the present application, the target color light-emitting elements with wavelengths in M ​​bands are respectively arranged in at least M partitions of the light-emitting panel, and the target color light-emitting elements with wavelengths in the same band are arranged in the same partition. In this way, since the wavelengths of light emitted by the target color light-emitting elements in each partition are in the same band, at least the brightness of each partition can be guaranteed to be uniform, thereby improving or even eliminating the problem of uneven brightness and / or uneven chromaticity of the light-emitting panel.

[0042] In addition, compared with the scheme of disorderly arrangement of target color light-emitting elements in the related art, since the light-emitting panel 20 of the embodiment of the present application is divided into multiple partitions, the compensation scheme can be designed according to the partitions when brightness compensation or chromaticity compensation is subsequently performed, that is, brightness compensation and chromaticity compensation are easier to achieve, which is conducive to achieving regionalized brightness adjustment and / or chromaticity adjustment.

[0043] Considering that the wavelengths of the light emitted by the target color light emitting elements 202 in different partitions 20A are different, brightness differences may occur between different partitions 20A. In view of this, the inventors of the present application studied the relationship between wavelength and brightness, and formulated a brightness compensation scheme for each partition 20A according to the wavelength of the target color light emitting elements 202 in each partition 20A.

[0044] Specifically, the inventors of the present application have found that, when the target color light-emitting element 202 is a blue light-emitting element or a green light-emitting element, and the driving currents of the target color light-emitting elements 202 in each partition are the same or similar, the brightness of the partition where the target color light-emitting element 202 with a larger wavelength is located is relatively dim, and the brightness of the partition where the target color light-emitting element 202 with a smaller wavelength is located is relatively bright. In view of the above findings, the inventors of the present application consider increasing the driving current of the target color light-emitting element 202 in the partition where the target color light-emitting element 202 with a larger wavelength is located, and reducing the driving current of the target color light-emitting element 202 in the partition where the target color light-emitting element 202 with a smaller wavelength is located, so as to improve or even eliminate the brightness difference between different partitions 20A.

[0045] According to some embodiments of the present application, optionally, the target color light-emitting element 202 may be a green light-emitting element or a blue light-emitting element. Among the N partitions 20A, the wavelength of light emitted by the target color light-emitting element 202 in the pth partition is greater than the wavelength of light emitted by the target color light-emitting element 202 in the qth partition, and p and q are both positive integers. That is, the wavelength band where the target color light-emitting element 202 in the pth partition is located is large, and the wavelength band where the target color light-emitting element 202 in the qth partition is located is small. When the light-emitting panel 20 emits light, the current value of the current flowing through the first electrode of the target color light-emitting element 202 in the pth partition is greater than the current value of the current flowing through the first electrode of the target color light-emitting element 202 in the qth partition; and / or, the duty cycle of the light-emitting stage corresponding to the target color light-emitting element 202 in the pth partition is greater than the duty cycle of the light-emitting stage corresponding to the target color light-emitting element 202 in the qth partition. Wherein, the first electrode may be the anode of the target color light-emitting element. That is, the driving current of the target color light emitting element 202 in the pth partition can be greater than the driving current of the target color light emitting element 202 in the qth partition, so that the brightness of the pth partition is close to or the same as the brightness of the qth partition. Of course, the duty cycle of the light emitting stage corresponding to the target color light emitting element 202 in the pth partition can also be made greater than the duty cycle of the light emitting stage corresponding to the target color light emitting element 202 in the qth partition. Among them, the duty cycle of the light emitting stage is the proportion of the light emitting stage to one frame time, and the duty cycle of the light emitting stage is positively correlated with the brightness. The larger the duty cycle of the light emitting stage, the greater the brightness.

[0046] In this way, when the target color light-emitting element 202 is a green light-emitting element or a blue light-emitting element, since the driving current of the target color light-emitting element 202 in the pth partition with a larger band can be greater than the driving current of the target color light-emitting element 202 in the qth partition with a smaller band, and / or the duty cycle of the light-emitting stage corresponding to the target color light-emitting element 202 in the pth partition is greater than the duty cycle of the light-emitting stage corresponding to the target color light-emitting element 202 in the qth partition, the brightness of the pth partition can be made close to or the same as the brightness of the qth partition, thereby improving or even eliminating the brightness difference between different partitions 20A.

[0047] In practical applications, the N partitions 20A may also include an x-th partition, and the wavelength of light emitted by the target color light-emitting element 202 in the p-th partition>the wavelength of light emitted by the target color light-emitting element 202 in the x-th partition>the wavelength of light emitted by the target color light-emitting element 202 in the q-th partition. That is, the x-th partition may be understood as the partition where the target color light-emitting element 202 of the central band is located. When adjusting the driving current, the driving current of the target color light-emitting element 202 in the x-th partition may be used as the first reference value, and the driving current of the target color light-emitting element 202 in the p-th partition may be increased based on the first reference value, and the driving current of the target color light-emitting element 202 in the q-th partition may be reduced based on the first reference value. Similarly, when adjusting the light-emitting stage duty cycle, the light-emitting stage duty cycle corresponding to the target color light-emitting element 202 in the x-th partition can be used as the second reference value, and the light-emitting stage duty cycle corresponding to the target color light-emitting element 202 in the p-th partition can be increased based on the second reference value, and the light-emitting stage duty cycle corresponding to the target color light-emitting element 202 in the q-th partition can be reduced based on the second reference value.

[0048] like Figure 3 As shown, in some specific embodiments, optionally, the substrate 201 may further include a data signal line data and a first driving circuit 301. The first driving circuit 301 may also be referred to as a pixel driving circuit or a pixel circuit, and is used to drive the target color light emitting element 202 to emit light. Specifically, at least one first driving circuit 301 is distributed in each partition 20A, and the first driving circuit 301 is electrically connected to the data signal line data and at least one target color light emitting element 202 in the partition where the first driving circuit 301 is located, and is used to drive the target color light emitting element 202 to emit light;

[0049] Still taking the target color light-emitting element 202 as a green light-emitting element or a blue light-emitting element as an example, when the light-emitting panel emits light, the data signal line data outputs a data signal to the first driving circuit 301, and the voltage value of the data signal input to the first driving circuit 301 connected to the target color light-emitting element 202 in the pth partition is less than the voltage value of the data signal input to the first driving circuit 301 connected to the target color light-emitting element 202 in the qth partition.

[0050] As shown in the following expression (1), the relationship between the voltage value of the data signal and the driving current can be:

[0051]

[0052] Wherein, I represents the driving current of the target color light emitting element, W represents the channel width of the driving transistor in the first driving circuit, L represents the channel length of the driving transistor in the first driving circuit, Cox represents the gate capacitance, μ represents the mobility, V DD Represents the positive power supply voltage, V data Indicates the voltage value of the data signal.

[0053] It can be seen from expression (1) that the voltage value of the data signal V data It is negatively correlated with the driving current I of the target color light emitting element, that is, V data The larger the value, the smaller the driving current I. Therefore, by making the voltage value of the data signal input to the first driving circuit 301 connected to the target color light-emitting element 202 in the p-th partition smaller than the voltage value of the data signal input to the first driving circuit 301 connected to the target color light-emitting element 202 in the q-th partition, the driving current of the target color light-emitting element 202 in the p-th partition can be greater than the driving current of the target color light-emitting element 202 in the q-th partition.

[0054] In this way, when the target color light-emitting element 202 is a green light-emitting element or a blue light-emitting element, since the voltage value of the data signal input by the first driving circuit 301 connected to the target color light-emitting element 202 in the p-th partition is less than the voltage value of the data signal input by the first driving circuit 301 connected to the target color light-emitting element 202 in the q-th partition, the driving current of the target color light-emitting element 202 in the p-th partition can be made greater than the driving current of the target color light-emitting element 202 in the q-th partition, thereby making the brightness of the p-th partition close to or the same as the brightness of the q-th partition, thereby improving or even eliminating the brightness difference between different partitions 20A.

[0055] However, the inventors of the present application have found that when the target color light-emitting element 202 is a red light-emitting element, the brightness change is exactly the opposite of when the target color light-emitting element 202 is a green light-emitting element or a blue light-emitting element. Specifically, when the target color light-emitting element 202 is a red light-emitting element, and the driving currents of the target color light-emitting elements 202 in each partition are the same or similar, the brightness of the partition where the target color light-emitting element 202 with a larger wavelength is located is relatively bright, and the brightness of the partition where the target color light-emitting element 202 with a smaller wavelength is located is relatively dark. In view of the above findings, the inventors of the present application consider that when the target color light-emitting element 202 is a red light-emitting element, the driving current of the target color light-emitting element 202 in the partition where the target color light-emitting element 202 with a larger wavelength is located can be reduced, and the driving current of the target color light-emitting element 202 in the partition where the target color light-emitting element 202 with a smaller wavelength is increased, so as to improve or even eliminate the brightness difference between different partitions 20A.

[0056] Specifically, according to some embodiments of the present application, optionally, the target color light-emitting element 202 may be a red light-emitting element. Among the N partitions 20A, the wavelength of light emitted by the target color light-emitting element 202 in the pth partition is greater than the wavelength of light emitted by the target color light-emitting element 202 in the qth partition, and p and q are both positive integers. That is, the wavelength band in which the target color light-emitting element 202 in the pth partition is located is large, and the wavelength band in which the target color light-emitting element 202 in the qth partition is located is small. When the light-emitting panel 20 emits light, the current value of the current flowing through the first electrode of the target color light-emitting element 202 in the pth partition is less than the current value of the current flowing through the first electrode of the target color light-emitting element 202 in the qth partition; and / or, the duty cycle of the light-emitting stage corresponding to the target color light-emitting element 202 in the pth partition is less than the duty cycle of the light-emitting stage corresponding to the target color light-emitting element 202 in the qth partition. Wherein, the first electrode may be the anode of the target color light-emitting element. That is, the driving current of the target color light emitting element 202 in the pth partition may be smaller than the driving current of the target color light emitting element 202 in the qth partition, so that the brightness of the pth partition is close to or the same as the brightness of the qth partition. Of course, the duty cycle of the light emitting phase corresponding to the target color light emitting element 202 in the pth partition may be smaller than the duty cycle of the light emitting phase corresponding to the target color light emitting element 202 in the qth partition, so that the brightness of the pth partition is close to or the same as the brightness of the qth partition.

[0057] In this way, when the target color light-emitting element 202 is a red light-emitting element, since the driving current of the target color light-emitting element 202 in the pth partition with a larger band can be smaller than the driving current of the target color light-emitting element 202 in the qth partition with a smaller band, and / or the duty cycle of the light-emitting stage corresponding to the target color light-emitting element 202 in the pth partition is smaller than the duty cycle of the light-emitting stage corresponding to the target color light-emitting element 202 in the qth partition, the brightness of the pth partition can be made close to or the same as the brightness of the qth partition, thereby improving or even eliminating the brightness difference between different partitions 20A.

[0058] In practical applications, the N partitions 20A may also include an x-th partition, and the wavelength of light emitted by the target color light-emitting element 202 in the p-th partition>the wavelength of light emitted by the target color light-emitting element 202 in the x-th partition>the wavelength of light emitted by the target color light-emitting element 202 in the q-th partition. That is, the x-th partition may be understood as the partition where the target color light-emitting element 202 of the central band is located. When adjusting the driving current, the driving current of the target color light-emitting element 202 in the x-th partition may be used as the first reference value, and the driving current of the target color light-emitting element 202 in the p-th partition may be reduced based on the first reference value, and the driving current of the target color light-emitting element 202 in the q-th partition may be increased based on the first reference value. Similarly, when adjusting the duty cycle of the light emitting stage, the duty cycle of the light emitting stage corresponding to the target color light emitting element 202 in the x-th partition can be used as the second reference value, and the duty cycle of the light emitting stage corresponding to the target color light emitting element 202 in the p-th partition can be reduced based on the second reference value, and the duty cycle of the light emitting stage corresponding to the target color light emitting element 202 in the q-th partition can be increased based on the second reference value.

[0059] Continue to see Figure 3 Taking the target color light-emitting element 202 as a red light-emitting element as an example, when the light-emitting panel emits light, the data signal line data outputs a data signal to the first driving circuit 301, and the voltage value of the data signal input to the first driving circuit 301 connected to the target color light-emitting element 202 in the pth partition can be greater than the voltage value of the data signal input to the first driving circuit 301 connected to the target color light-emitting element 202 in the qth partition.

[0060] In this way, when the target color light-emitting element 202 is a red light-emitting element, since the voltage value of the data signal input by the first driving circuit 301 connected to the target color light-emitting element 202 in the p-th partition is greater than the voltage value of the data signal input by the first driving circuit 301 connected to the target color light-emitting element 202 in the q-th partition, the driving current of the target color light-emitting element 202 in the p-th partition can be made smaller than the driving current of the target color light-emitting element 202 in the q-th partition, thereby making the brightness of the p-th partition close to or the same as the brightness of the q-th partition, thereby improving or even eliminating the brightness difference between different partitions 20A.

[0061] Considering that the wavelengths of the light emitted by the target color light emitting elements 202 in different partitions 20A are different, chromaticity differences may occur between different partitions 20A. In view of this, the inventors of the present application also studied the relationship between wavelength and chromaticity, and formulated a chromaticity compensation scheme for each partition 20A according to the wavelength of the target color light emitting element 202 in each partition 20A.

[0062] Specifically, Figure 4 As shown, according to some embodiments of the present application, optionally, the light-emitting panel 20 may further include a color conversion layer 401, and the color conversion layer 401 may include a red conversion unit 401a, a green conversion unit 401b, and a blue conversion unit 401c. In the direction Z perpendicular to the plane where the light-emitting panel 20 is located, the color conversion layer 401 may be located on the side of the target color light-emitting element 202 away from the substrate 201. It is easy to understand that the red conversion unit 401a is used to convert the light emitted by the target color light-emitting element 202 into red, the green conversion unit 401b is used to convert the light emitted by the target color light-emitting element 202 into green, and the blue conversion unit 401c is used to convert the light emitted by the target color light-emitting element 202 into blue, so that the light-emitting panel 20 can emit light of multiple colors.

[0063] Continue to see Figure 4 In some specific embodiments, the color conversion layer 401 may be a phosphor layer or a quantum dot layer. It is easy to understand that when the color conversion layer 401 is a phosphor layer, the red conversion unit 401a contains red phosphor, the green conversion unit 401b contains green phosphor, and the blue conversion unit 401c contains blue phosphor. The light emitted by the target color light emitting element 202 emits red light by stimulating the red phosphor in the red conversion unit 401a, the light emitted by the target color light emitting element 202 emits green light by stimulating the green phosphor in the green conversion unit 401b, and the light emitted by the target color light emitting element 202 emits blue light by stimulating the blue phosphor in the blue conversion unit 401c.

[0064] It is easy to understand that when the color conversion layer 401 is a quantum dot layer, the quantum dot material in the quantum dot layer can be, for example, zinc sulfide (ZnS), zinc selenide (ZnSe), zinc telluride (ZnTe), cadmium selenide (CdSe), cadmium telluride (CdTe), cadmium sulfide (CdS), gallium nitride (GaN), indium nitride (InN), indium phosphide (InP), indium arsenide (InAs), lead sulfide (PbS) and / or lead selenide (PbSe). The light emitted by the target color light emitting element 202 is converted into light of different colors by exciting quantum dots of different materials and / or different sizes in the quantum dot layer.

[0065] like Figure 5a As shown, in some specific embodiments, the color conversion layer 401 can also be a color resist layer 501. Accordingly, the red conversion unit 401a can be a red color resist, the green conversion unit 401b can be a green color resist, and the blue conversion unit 401c can be a blue color resist. When the light emitted by the target color light emitting element 202 is incident on the red color resist, the red color resist only allows red light to pass through; when the light emitted by the target color light emitting element 202 is incident on the green color resist, the green color resist only allows green light to pass through; when the light emitted by the target color light emitting element 202 is incident on the blue color resist, the blue color resist only allows blue light to pass through, so that the light emitting panel 20 can emit light of multiple colors.

[0066] It should be noted that, in some embodiments, the light-emitting panel 20 may include one of the phosphor layer and the quantum dot layer and the color resist layer 501. In the direction Z perpendicular to the plane where the light-emitting panel 20 is located, the phosphor layer or the quantum dot layer is located between the target color light-emitting element 202 and the color resist layer 501. The light emitted by the target color light-emitting element 202 is first mixed into white light by the phosphor layer or the quantum dot layer, and then filtered by the color resist layer 501, so that the light-emitting panel 20 can emit light of multiple colors and display a multi-color picture.

[0067] It should be noted that, for example, Figure 5a In the illustrated embodiment, the light emitting panel 20 may optionally be used as an active light emitting panel. When the light emitting panel 20 is an active light emitting panel, in the direction Z perpendicular to the plane where the light emitting panel 20 is located, no liquid crystal layer may be provided between the film layer where the target color light emitting element 202 is located and the color resist layer 501, and the functions of the red color resist, the green color resist, and the blue color resist in the color resist layer 501 are, for example, to improve the color purity of the light emitted by the target color light emitting element 202 and / or the non-target color light emitting element.

[0068] In some other specific embodiments, the light emitting panel 20 can be optionally used as a backlight source in a backlight module, and the light emitting side of the backlight source is matched with a liquid crystal display panel. Figure 5bAs shown, when the light-emitting elements (including the target color light-emitting elements 202 and / or the non-target color light-emitting elements) in the light-emitting panel 20 are used as backlight sources, a liquid crystal layer may be further provided between the film layer where the target color light-emitting elements 202 are located and the color-resistance layer 501 in the direction Z perpendicular to the plane where the light-emitting panel 20 is located. Exemplarily, for example, when only the blue light-emitting elements or the white light-emitting elements in the light-emitting panel 20 are used as backlight sources, a liquid crystal layer may be further provided between the film layer where the target color light-emitting elements 202 are located and the color-resistance layer 501 in the direction Z perpendicular to the plane where the light-emitting panel 20 is located.

[0069] In order to improve or even eliminate the chromaticity difference between different partitions 20A, according to some embodiments of the present application, optionally, among the N partitions 20A, the wavelength of the light emitted by the target color light-emitting element 202 in the pth partition is greater than the wavelength of the light emitted by the target color light-emitting element in the qth partition, and the wavelength of the light emitted by the target color light-emitting element in the qth partition is greater than the wavelength of the light emitted by the target color light-emitting element in the kth partition, and p, q and k are all positive integers. That is, the qth partition (same as the xth partition mentioned above) can be understood as the partition where the target color light-emitting element 202 of the central band is located.

[0070] It is worth noting that the thickness of at least two color conversion units among the red conversion unit 401a, the green conversion unit 401b and the blue conversion unit 401c in the p-th partition with a larger wavelength band may be different. For example, the thickness of the red conversion unit 401a is different from the thickness of the blue conversion unit 401c. For another example, the thickness of the red conversion unit 401a, the thickness of the green conversion unit 401b and the thickness of the blue conversion unit 401c are all different. It is easy to understand that the thickness can be understood as the minimum distance or vertical distance along the direction Z perpendicular to the plane where the light-emitting panel is located. Similarly, the thickness of at least two color conversion units among the red conversion unit 401a, the green conversion unit 401b and the blue conversion unit 401c in the k-th partition with a smaller wavelength band may also be different.

[0071] In this way, by adjusting the thickness of at least two color conversion units including the red conversion unit 401a, the green conversion unit 401b and the blue conversion unit 401c in the pth partition with a larger band and / or the kth partition with a smaller band, the chromaticity of the pth partition and / or the kth partition can be adjusted from the original color cast to white balance or close to white balance, thereby improving or even eliminating the chromaticity differences between different partitions 20A.

[0072] It should be noted that the thickness of at least two color conversion units among the red conversion unit 401a, the green conversion unit 401b, and the blue conversion unit 401c in the qth partition of the central band can be the same or different, and can be flexibly adjusted according to actual conditions, and the embodiments of the present application do not limit this. For example, in some specific examples, the thickness of the red conversion unit 401a, the green conversion unit 401b, and the blue conversion unit 401c in the qth partition can be the same, and only the thickness of the color conversion unit in other partitions except the central band is adjusted. In addition, it should be noted that although only three partitions, namely the pth partition, the qth partition, and the kth partition, are listed above, the light-emitting panel 20 may include more than three partitions, and the listing of the pth partition, the qth partition, and the kth partition is only used to illustrate the variation law of the thickness and wavelength of the color conversion unit.

[0073] The inventors of the present application have further studied and found that, when the target color light-emitting element 202 is a red light-emitting element or a blue light-emitting element, the chromaticity of the sub-area where the target color light-emitting element 202 with a larger wavelength is located will be bluish, and the chromaticity of the sub-area where the target color light-emitting element 202 with a smaller wavelength is located will be yellowish. In view of the above findings, the inventors of the present application consider that when the target color light-emitting element 202 is a red light-emitting element or a blue light-emitting element, the thickness of the blue conversion unit 401c in the sub-area where the target color light-emitting element 202 with a larger wavelength is located can be reduced to reduce the degree of bluishness; the thickness of the red conversion unit 401a and / or the green conversion unit 401b in the sub-area where the target color light-emitting element 202 with a smaller wavelength is located can be reduced to reduce the degree of yellowishness.

[0074] Specifically, according to some embodiments of the present application, optionally, the target color light emitting element 202 may be a red light emitting element or a blue light emitting element. Figure 6 As shown, the thickness of the color conversion unit in the partition satisfies:

[0075] In the pth partition, the thickness of the green conversion unit 401 b ≥ the thickness of the red conversion unit 401 a > the thickness of the blue conversion unit 401 c ;

[0076] In the qth partition, the thickness of the green conversion unit 401b = the thickness of the red conversion unit 401a = the thickness of the blue conversion unit 401c;

[0077] In the kth partition, the thickness of the green conversion unit 401 b ≤ the thickness of the red conversion unit 401 a < the thickness of the blue conversion unit 401 c .

[0078] Table 1 schematically shows the thickness of the color conversion unit in the partition when the target color light emitting element 202 is a red light emitting element. Table 2 schematically shows the thickness of the color conversion unit in the partition when the target color light emitting element 202 is a blue light emitting element. As shown in Tables 1 and 2, in practical applications, for example, the thickness of the red conversion unit 401a, the thickness of the green conversion unit 401b, and the thickness of the red conversion unit 401a in the qth partition can be used as a reference, so that the thickness of the blue conversion unit 401c in the pth partition is reduced, the thickness of the red conversion unit 401a remains unchanged, and the thickness of the green conversion unit 401b is thickened, and the thickness of the blue conversion unit 401c in the kth partition remains unchanged, the thickness of the green conversion unit 401b is reduced, and the thickness of the red conversion unit 401a is reduced.

[0079] Table 1 Thickness of the color conversion unit in the partition when the red light emitting element is used

[0080]

[0081] Table 2 Thickness of the color conversion unit in the partition of the blue light emitting element

[0082]

[0083] In this way, when the target color light-emitting element 202 is a red light-emitting element or a blue light-emitting element, by adjusting the thickness of at least two color conversion units among the red conversion unit 401a, the green conversion unit 401b and the blue conversion unit 401c in the pth partition with a larger band and the kth partition with a smaller band, the chromaticity of the pth partition can be adjusted from the original bluish to white balance or close to white balance, and the chromaticity of the kth partition can be adjusted from the original yellowish to white balance or close to white balance, thereby improving or even eliminating the chromaticity differences between different partitions 20A.

[0084] In some specific examples, optionally, when the target color light-emitting element 202 is a red light-emitting element or a blue light-emitting element, the thickness of the red conversion unit in the p-th partition may be equal to the thickness of the red conversion unit in the q-th partition, and / or the thickness of the blue conversion unit in the k-th partition may be equal to the thickness of the blue conversion unit in the q-th partition. That is, the thickness of the red conversion unit in the q-th partition may be used as the first reference, so that the thickness of the red conversion unit in the p-th partition is the same as the first reference, that is, the same as the thickness of the red conversion unit in the q-th partition. Similarly, the thickness of the blue conversion unit in the q-th partition may be used as the second reference, so that the thickness of the blue conversion unit in the k-th partition is the same as the second reference, that is, the same as the thickness of the blue conversion unit in the q-th partition.

[0085] In this way, it is only necessary to adjust the thickness of the green conversion unit 401b and / or the blue conversion unit 401c in the pth partition, and adjust the thickness of the red conversion unit 401a and the green conversion unit 401b in the kth partition, so as to achieve chromaticity adjustment of the pth partition and the kth partition, which is conducive to simplifying the production process.

[0086] The inventors of the present application have further studied and found that when the target color light-emitting element 202 is a green light-emitting element, the chromaticity change is different from the chromaticity change when the target color light-emitting element 202 is a red light-emitting element or a blue light-emitting element. Specifically, when the target color light-emitting element 202 is a green light-emitting element, the chromaticity of the partition where the target color light-emitting element 202 with a larger wavelength is located will be yellowish, and the chromaticity of the partition where the target color light-emitting element 202 with a smaller wavelength is located will be bluish. In view of the above findings, the inventors of the present application consider that when the target color light-emitting element 202 is a green light-emitting element, the thickness of the red conversion unit 401a and / or the green conversion unit 401b in the partition where the target color light-emitting element 202 with a larger wavelength is located can be reduced to reduce the degree of yellowishness; the thickness of the blue conversion unit 401c in the partition where the target color light-emitting element 202 with a smaller wavelength is located can be reduced to reduce the degree of bluishness.

[0087] Specifically, according to some embodiments of the present application, optionally, the target color light emitting element 202 may be a green light emitting element, such as Figure 7 As shown, the thickness of the color conversion unit in the partition satisfies:

[0088] In the pth partition, the thickness of the green conversion unit 401b = the thickness of the red conversion unit 401a < the thickness of the blue conversion unit 401c;

[0089] In the qth partition, the thickness of the green conversion unit 401b = the thickness of the red conversion unit 401a = the thickness of the blue conversion unit 401c;

[0090] In the k-th partition, the thickness of the green conversion unit 401 b > the thickness of the red conversion unit 401 a > the thickness of the blue conversion unit 401 c .

[0091] Table 3 schematically shows the thickness of the color conversion unit in the partition when the target color light emitting element 202 is a green light emitting element. As shown in Table 3, in practical applications, for example, the thickness of the red conversion unit 401a, the thickness of the green conversion unit 401b, and the thickness of the red conversion unit 401a in the qth partition can be used as a reference, so that the thickness of the blue conversion unit 401c in the kth partition is reduced, the thickness of the red conversion unit 401a remains unchanged, and the thickness of the green conversion unit 401b is thickened, and the thickness of the blue conversion unit 401c in the pth partition remains unchanged, the thickness of the green conversion unit 401b is reduced, and the thickness of the red conversion unit 401a is reduced.

[0092] Table 3 Thickness of the color conversion unit in the partition when the green light emitting element is used

[0093]

[0094] In this way, when the target color light-emitting element 202 is a green light-emitting element, by adjusting the thickness of at least two color conversion units among the red conversion unit 401a, the green conversion unit 401b and the blue conversion unit 401c in the p-th partition with a larger band and the k-th partition with a smaller band, the chromaticity of the p-th partition can be adjusted from the original yellowish to white balance or close to white balance, and the chromaticity of the k-th partition can be adjusted from the original bluish to white balance or close to white balance, thereby improving or even eliminating the chromaticity differences between different partitions 20A.

[0095] In some specific examples, optionally, when the target color light-emitting element 202 is a green light-emitting element, the thickness of the red conversion unit in the kth partition may be equal to the thickness of the red conversion unit in the qth partition, and / or the thickness of the blue conversion unit in the pth partition may be equal to the thickness of the blue conversion unit in the qth partition. That is, the thickness of the red conversion unit in the qth partition may be used as the first reference, so that the thickness of the red conversion unit in the kth partition is the same as the first reference, that is, the same as the thickness of the red conversion unit in the qth partition. The thickness of the blue conversion unit in the qth partition may be used as the second reference, so that the thickness of the blue conversion unit in the pth partition is the same as the second reference, that is, the same as the thickness of the blue conversion unit in the qth partition.

[0096] In this way, it is only necessary to adjust the thickness of the green conversion unit 401b and / or the blue conversion unit 401c in the kth partition, and adjust the thickness of the red conversion unit 401a and the green conversion unit 401b in the pth partition, so as to achieve chromaticity adjustment of the pth partition and the kth partition, which is conducive to simplifying the production process.

[0097] like Figure 8As shown, according to some embodiments of the present application, optionally, a bonding point P may be provided on the substrate 201, and the pin of the target color light-emitting element 202 may be electrically connected to the bonding point P, and each partition 20A includes at least one bonding point P. In the direction perpendicular to the plane where the light-emitting panel is located, the shapes of the bonding points in the partitions 20A corresponding to different bands are different, and / or the shapes of the pins of the target color light-emitting elements 202 corresponding to different bands are different. For example, the shape of the bonding point in the partition 20A corresponding to the first band is circular, the shape of the bonding point in the partition 20A corresponding to the second band is rectangular, and the shape of the bonding point in the partition 20A corresponding to the third band is triangular, and so on. Similarly, for example, the shape of the pin of the target color light-emitting element 202 corresponding to the first band is circular, the shape of the pin of the target color light-emitting element 202 corresponding to the second band is rectangular, and the shape of the pin of the target color light-emitting element 202 corresponding to the third band is triangular. It should be noted that the shape of the bonding point and the shape of the pin can be any shape, such as a circle or an arbitrary polygon, and the embodiments of the present application are not limited to this.

[0098] In this way, since the shapes of the bonding points in the partitions 20A corresponding to different bands are different, and / or the shapes of the pins of the target color light-emitting elements 202 corresponding to different bands are different, it is possible to quickly distinguish which band of the target color light-emitting element 202 each partition should be bonded to, and which partition each target color light-emitting element 202 should be bonded to, based on the shapes of the bonding points and the shapes of the pins, thereby providing the possibility for rapid bonding of the target color light-emitting element 202 and the substrate 201 and avoiding errors during bonding.

[0099] Continue to see Figure 8 In some specific embodiments, optionally, in a direction perpendicular to the plane where the light-emitting panel is located, the shape of the bonding point in the partition corresponding to the i-th band can be the same as the shape of the pin of the target color light-emitting element corresponding to the i-th band, where i is a positive integer. That is, the shape of the bonding point in the partition corresponding to the same band can be the same as the shape of the pin of the corresponding target color light-emitting element.

[0100] In this way, since the pins of the target color light-emitting elements must be the same shape as the bonding points for bonding, when the target color light-emitting elements are bonded, even if the target color light-emitting elements of M bands are mixed together, each target color light-emitting element can be matched to the bonding points of the same shape based on the shape of its own pins, that is, installed in the corresponding partition, thereby realizing automatic partitioned assembly of the target color light-emitting elements, greatly reducing the difficulty of bonding and the time required for bonding, and thus reducing production costs.

[0101] like Fig. 9As shown, according to some embodiments of the present application, the light emitting panel 20 may be a spliced ​​screen. The light emitting panel 20 may be spliced ​​by N splicing units 900, and each splicing unit 900 may include a partition 20A.

[0102] In this way, since the wavelength of light emitted by the target color light-emitting elements in each splicing unit 900 is in the same band, at least the brightness of each splicing unit 900 can be guaranteed to be uniform, thereby improving or even eliminating the problem of uneven brightness and / or uneven color of the splicing screen.

[0103] In some of the embodiments described above, the brightness differences and chromaticity differences between different partitions (different splicing units 900) can be improved or even eliminated, thereby further improving or even eliminating the problem of uneven brightness and / or uneven chromaticity of the spliced ​​screen.

[0104] Based on the display panel provided in the above embodiment, the present application also provides a display device accordingly. Fig.10 As shown, the display device 1000 may include a device body 10 and the light emitting panel 20 in the above embodiment, and the light emitting panel 20 covers the device body 10. Various devices, such as sensor devices, processing devices, etc., may be provided in the device body 10, which are not limited here. The display device 1000 may specifically be a device with a display function, such as a mobile phone, a computer, a tablet computer, a digital camera, a television, an electronic paper, etc., which are not limited here.

[0105] like Fig.11 As shown, in some embodiments, the light emitting panel 20 may be a backlight panel, and the display device 1000 may further include a light emitting surface (such as Fig.11 The display panel 30 on the surface a) side.

[0106] It should be clear that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. For the display panel embodiment and the display device embodiment, the relevant parts can refer to the description part of the pixel driving circuit embodiment and the array substrate embodiment. The present application is not limited to the specific structure described above and shown in the figures. Those skilled in the art can make various changes, modifications and additions after understanding the spirit of the present application. In addition, for the sake of brevity, a detailed description of the known technology is omitted here.

[0107] Those skilled in the art should understand that the above embodiments are exemplary rather than restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on the study of the drawings, the specification and the claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other structures; the quantity involves "one" but does not exclude multiple; the terms "first" and "second" are used to indicate names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A light-emitting panel, characterized in that: The light-emitting panel comprises a substrate and Q target color light-emitting elements of the same color located on the substrate, the wavelength range of light emitted by the Q target color light-emitting elements is divided into M different bands, and Q and M are both positive integers; The light-emitting panel includes N partitions, in which at least one target color light-emitting element is distributed, N≥M, and N and M are both greater than or equal to 2; the wavelengths of light emitted by the target color light-emitting elements in at least M partitions are respectively in M ​​bands, each partition corresponds to one band, and the wavelengths of light emitted by the target color light-emitting elements in the same partition are all in the same band.

2. The light emitting panel according to claim 1, characterized in that: The target color light emitting element is a green light emitting element or a blue light emitting element; Among the N partitions, the wavelength of light emitted by the target color light-emitting element in the p-th partition is greater than the wavelength of light emitted by the target color light-emitting element in the q-th partition, and p and q are both positive integers; When the light-emitting panel emits light, the current value of the current flowing through the first electrode of the target color light-emitting element in the pth partition is greater than the current value of the current flowing through the first electrode of the target color light-emitting element in the qth partition; and / or, The duty cycle of the light emitting phase corresponding to the target color light emitting element in the pth partition is greater than the duty cycle of the light emitting phase corresponding to the target color light emitting element in the qth partition.

3. The light emitting panel according to claim 2, characterized in that: The substrate further includes a data signal line and a first driving circuit, at least one first driving circuit is distributed in the partition, the first driving circuit is electrically connected to the data signal line and at least one target color light emitting element in the partition where the first driving circuit is located, and is used to drive the target color light emitting element to emit light; When the light-emitting panel emits light, the data signal line outputs a data signal to the first driving circuit, and a voltage value of the data signal input to the first driving circuit connected to the target color light-emitting element in the pth partition is less than a voltage value of the data signal input to the first driving circuit connected to the target color light-emitting element in the qth partition.

4. The light emitting panel according to claim 1, characterized in that: The target color light emitting element is a red light emitting element; Among the N partitions, the wavelength of light emitted by the target color light-emitting element in the p-th partition is greater than the wavelength of light emitted by the target color light-emitting element in the q-th partition, and p and q are both positive integers; When the light-emitting panel emits light, the current value of the current flowing through the first electrode of the target color light-emitting element in the pth partition is smaller than the current value of the current flowing through the first electrode of the target color light-emitting element in the qth partition; and / or, The duty cycle of the light emitting phase corresponding to the target color light emitting element in the pth partition is smaller than the duty cycle of the light emitting phase corresponding to the target color light emitting element in the qth partition.

5. The light emitting panel according to claim 4, characterized in that: The substrate further includes a data signal line and a first driving circuit, at least one first driving circuit is distributed in each of the partitions, and the first driving circuit is electrically connected to the data signal line and at least one target color light-emitting element in the partition where the first driving circuit is located, and is used to drive the target color light-emitting element to emit light; When the light-emitting panel emits light, the data signal line outputs a data signal to the first driving circuit, and a voltage value of the data signal input to the first driving circuit connected to the target color light-emitting element in the pth partition is greater than a voltage value of the data signal input to the first driving circuit connected to the target color light-emitting element in the qth partition.

6. The light emitting panel according to claim 1, characterized in that: The light emitting panel further comprises a color conversion layer, the color conversion layer comprising a red conversion unit, a green conversion unit and a blue conversion unit; In a direction perpendicular to the plane where the light-emitting panel is located, the color conversion layer is located on a side of the target color light-emitting element away from the substrate; Among the N partitions, the wavelength of light emitted by the target color light-emitting element in the p-th partition is greater than the wavelength of light emitted by the target color light-emitting element in the q-th partition, and the wavelength of light emitted by the target color light-emitting element in the q-th partition is greater than the wavelength of light emitted by the target color light-emitting element in the k-th partition, and p, q and k are all positive integers; At least two of the red conversion unit, the green conversion unit and the blue conversion unit in the pth partition and / or the kth partition have different thicknesses, which are the minimum distances along a direction perpendicular to the plane where the light-emitting panel is located.

7. The light emitting panel according to claim 6, characterized in that: The target color light-emitting element is a red light-emitting element or a blue light-emitting element, and the thickness of the color conversion unit in the partition satisfies: In the p-th partition, the thickness of the green conversion unit ≥ the thickness of the red conversion unit > the thickness of the blue conversion unit; In the qth partition, the thickness of the green conversion unit=the thickness of the red conversion unit=the thickness of the blue conversion unit; In the k-th partition, the thickness of the green conversion unit ≤ the thickness of the red conversion unit < the thickness of the blue conversion unit.

8. The light emitting panel according to claim 7, characterized in that: The thickness of the red conversion unit in the p-th partition is equal to the thickness of the red conversion unit in the q-th partition, and / or the thickness of the blue conversion unit in the k-th partition is equal to the thickness of the blue conversion unit in the q-th partition.

9. The light emitting panel according to claim 6, characterized in that: The target color light-emitting element is a green light-emitting element, and the thickness of the color conversion unit in the partition satisfies: In the p-th partition, the thickness of the green conversion unit=the thickness of the red conversion unit<the thickness of the blue conversion unit; In the qth partition, the thickness of the green conversion unit=the thickness of the red conversion unit=the thickness of the blue conversion unit; In the k-th partition, the thickness of the green conversion unit>the thickness of the red conversion unit>the thickness of the blue conversion unit.

10. The light emitting panel according to claim 9, characterized in that: The thickness of the red conversion unit in the kth partition is equal to the thickness of the red conversion unit in the qth partition, and / or the thickness of the blue conversion unit in the pth partition is equal to the thickness of the blue conversion unit in the qth partition.

11. The light emitting panel according to claim 1, characterized in that: The substrate is provided with bonding points, the pins of the target color light emitting element are electrically connected to the bonding points, and the partition includes at least one of the bonding points; In a direction perpendicular to the plane where the light-emitting panel is located, the shapes of the bonding points in the partitions corresponding to different wavelength bands are different, and / or the shapes of the pins of the target color light-emitting elements corresponding to different wavelength bands are different.

12. The light emitting panel according to claim 11, characterized in that: In a direction perpendicular to the plane of the light-emitting panel, the shape of the bonding point in the partition corresponding to the i-th band is the same as the shape of the pin of the target color light-emitting element corresponding to the i-th band, and i is a positive integer.

13. The light emitting panel according to claim 1, characterized in that: The light-emitting panel is formed by splicing N splicing units, and the splicing unit includes one partition.

14. A display device, characterized in that: Comprising the light emitting panel according to any one of claims 1-13.

Images