Light-emitting substrate, preparation method and driving method thereof and display panel

Abstract

The invention discloses a light-emitting substrate, a preparation method and a driving method thereof, and a display panel. The light-emitting substrate comprises a substrate body and a plurality of light-emitting units. The light-emitting units are located on one side of the substrate. The plurality of light-emitting units includes a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and a compensation light-emitting unit. Wherein the distance between the coordinate point of the light emitted by one first light-emitting unit in the color coordinate and the coordinate point of the light emitted by the other first light-emitting unit in the color coordinate is greater than or equal to 0.035. The distance between the coordinate point of the light emitted by one second light-emitting unit in the color coordinate and the coordinate point of the light emitted by the other second light-emitting unit in the color coordinate is larger than or equal to 0.023. The distance between the coordinate point of the light emitted by one third light-emitting unit in the color coordinate and the coordinate point of the light emitted by the other third light-emitting unit in the color coordinate is larger than or equal to 0.005.

Description

Luminescent substrate, preparation method thereof, driving method thereof, and display panel Technical Field

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

[0002] Sub-millimeter light-emitting diode (Mini LED) display panels and micro light-emitting diode (Micro LED) display panels have excellent performance such as low power consumption, fast response, long life, high color saturation and high contrast.

[0003] With the continuous development of display technology, the application of Mini LED display panels and Micro LED display panels will become more and more extensive.

[0004] Summary of the Invention

[0005] In one aspect, a light-emitting substrate is provided. The light-emitting substrate includes a base substrate and a plurality of light-emitting units. The base substrate includes a plurality of pixel unit regions. The plurality of light-emitting units are located on one side of the base substrate. The plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and at least one compensation light-emitting unit located in each pixel unit region. The distance between the color coordinate coordinate point of a first color light emitted by one of the first light-emitting units and the color coordinate point of the first color light emitted by another of the first light-emitting units is greater than or equal to 0.035.

[0006] In some embodiments, a distance between a coordinate point of the second color light emitted by one second light emitting unit in the color coordinates and a coordinate point of the second color light emitted by another second light emitting unit in the color coordinates is greater than or equal to 0.023.

[0007] In some embodiments, a distance between a coordinate point of the third color light emitted by one of the third light emitting units in the color coordinates and a coordinate point of the third color light emitted by another of the third light emitting units in the color coordinates is greater than or equal to 0.005.

[0008] In some embodiments, a distance between a coordinate point of the first color light emitted by one of the first light-emitting units in the color coordinates and a coordinate point of the first color light emitted by another of the first light-emitting units in the color coordinates is greater than or equal to 0.042.

[0009] In some embodiments, a distance between a coordinate point of the second color light emitted by one second light emitting unit in the color coordinates and a coordinate point of the second color light emitted by another second light emitting unit in the color coordinates is greater than or equal to 0.026.

[0010] In some embodiments, a distance between a coordinate point of the third color light emitted by one of the third light emitting units in the color coordinates and a coordinate point of the third color light emitted by another of the third light emitting units in the color coordinates is greater than or equal to 0.007.

[0011] In some embodiments, the area of ​​the first MacAdam ellipse region corresponding to the third color light emitted by the third light-emitting unit is smaller than the area of ​​the second MacAdam ellipse region corresponding to the mixed light of the third color light emitted by the third light-emitting unit and the compensation light emitted by the compensation light-emitting unit.

[0012] In some embodiments, the range of the first MacAdam ellipse area on the first coordinate axis in the color coordinates is smaller than the range of the second MacAdam ellipse area on the first coordinate axis.

[0013] In some embodiments, the range of the first MacAdam ellipse area on the second coordinate axis in the color coordinate is smaller than the range of the second MacAdam ellipse area on the second coordinate axis.

[0014] In some embodiments, the ratio of the range value of the third color light on the first coordinate axis in the color coordinate to the range value of the first MacAdam ellipse area on the first coordinate axis is M1; the ratio of the range value of the mixed light of the third color light and the compensation light on the first coordinate axis in the color coordinate to the range value of the second MacAdam ellipse area on the first coordinate axis is N1; and M1 is greater than N1.

[0015] In some embodiments, the ratio of the range value of the third color light on the second coordinate axis in the color coordinate to the range value of the first MacAdam ellipse area on the second coordinate axis is M2; the ratio of the range value of the mixed light of the third color light and the compensation light on the second coordinate axis in the color coordinate to the range value of the second MacAdam ellipse area on the second coordinate axis is N2; and M2 is greater than N2.

[0016] In some embodiments, a pixel unit area includes a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and a compensation light-emitting unit. The attenuation rate of the luminance of the first light-emitting unit relative to the duration of a single lighting is greater than the attenuation rate of the luminance of the second light-emitting unit relative to the duration of a single lighting, and the attenuation rate of the luminance of the first light-emitting unit relative to the duration of a single lighting is greater than the attenuation rate of the luminance of the third light-emitting unit relative to the duration of a single lighting. The compensation light-emitting unit is located around the first light-emitting unit.

[0017] In some embodiments, a pixel unit area includes a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and two compensation light-emitting units. The first light-emitting unit emits less light than the second light-emitting unit, and the second light-emitting unit emits more light than the third light-emitting unit. One compensation light-emitting unit is located around the first light-emitting unit, and the other compensation light-emitting unit is located around the third light-emitting unit.

[0018] In some embodiments, a pixel unit area includes a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and three compensation light-emitting units. The three compensation light-emitting units include a first compensation light-emitting unit, a second compensation light-emitting unit, and a third compensation light-emitting unit. Along a direction parallel to the substrate, the first compensation light-emitting unit is located around the first light-emitting unit, the second compensation light-emitting unit is located around the second light-emitting unit, and the third compensation light-emitting unit is located around the third light-emitting unit.

[0019] In some embodiments, the ratio of the luminous brightness of the first compensating light-emitting unit to the luminous brightness of the first light-emitting unit, the ratio of the luminous brightness of the second compensating light-emitting unit to the luminous brightness of the second light-emitting unit, and the ratio of the luminous brightness of the third compensating light-emitting unit to the luminous brightness of the third light-emitting unit are different from each other.

[0020] In some embodiments, the attenuation rate of the luminance of the first light-emitting unit relative to the duration of a single lighting cycle is greater than the attenuation rate of the luminance of the second light-emitting unit relative to the duration of a single lighting cycle; the difference between the ratio of the luminance of the first compensating light-emitting unit to the luminance of the first light-emitting unit at a first moment and the ratio of the luminance of the first compensating light-emitting unit to the luminance of the first light-emitting unit at a second moment is a first proportional difference; the difference between the ratio of the luminance of the second compensating light-emitting unit to the luminance of the second light-emitting unit at the first moment and the ratio of the luminance of the second compensating light-emitting unit to the luminance of the second light-emitting unit at the second moment is a second proportional difference; the first proportional difference is greater than the second proportional difference. The first moment is the moment between the lighting moment and the second moment.

[0021] In some embodiments, the attenuation rate of the luminance of the second light-emitting unit relative to the duration of a single lighting cycle is greater than the attenuation rate of the luminance of the third light-emitting unit relative to the duration of a single lighting cycle; the difference between the ratio of the luminance of the second compensating light-emitting unit to the luminance of the second light-emitting unit at the first moment and the ratio of the luminance of the second compensating light-emitting unit to the luminance of the second light-emitting unit at the second moment is a third proportional difference; the difference between the ratio of the luminance of the third compensating light-emitting unit to the luminance of the third light-emitting unit at the first moment and the ratio of the luminance of the third compensating light-emitting unit to the luminance of the third light-emitting unit at the second moment is a fourth proportional difference; the third proportional difference is greater than the fourth proportional difference. The first moment is the moment between the lighting moment and the second moment.

[0022] In some embodiments, the ratio of the luminance of the compensation light-emitting unit to the luminance of the first light-emitting unit in different pixel unit regions is substantially the same.

[0023] In some embodiments, the ratio of the luminance of the compensation light-emitting unit to the luminance of the second light-emitting unit in different pixel unit areas is substantially the same.

[0024] In some embodiments, the ratio of the luminance of the compensation light-emitting unit to the luminance of the third light-emitting unit in different pixel unit regions is substantially the same.

[0025] In some embodiments, a ratio of the luminance of the compensation light-emitting unit to the luminance of the first light-emitting unit is greater than or equal to 10% and less than or equal to 50%.

[0026] In some embodiments, a ratio of the luminance of the compensation light-emitting unit to the luminance of the second light-emitting unit is greater than or equal to 10% and less than or equal to 50%.

[0027] In some embodiments, a ratio of the luminance of the compensation light-emitting unit to the luminance of the third light-emitting unit is greater than or equal to 10% and less than or equal to 50%.

[0028] In some embodiments, the light emitting area of ​​the compensation light emitting unit is substantially the same as the light emitting area of ​​the first light emitting unit.

[0029] In some embodiments, the light emitting area of ​​the compensation light emitting unit is substantially the same as the light emitting area of ​​the second light emitting unit.

[0030] In some embodiments, the light emitting area of ​​the compensation light emitting unit is substantially the same as the light emitting area of ​​the third light emitting unit.

[0031] In some embodiments, the coordinate point of the compensation light emitted by the compensation light-emitting unit in the color coordinate is located in the area enclosed by the first color coordinate point (0.3275, 0.3577), the second color coordinate point (0.3750, 0.6250) and the third color coordinate point (0.6000, 0.4000).

[0032] In some embodiments, the coordinate point of the compensation light emitted by the compensation light-emitting unit in the color coordinate is located in the area enclosed by the first color coordinate point (0.3275, 0.3577), the fourth color coordinate point (0.2800, 0.2500) and the fifth color coordinate point (0.2600, 0.2600).

[0033] In some embodiments, the coordinate point of the compensation light emitted by the compensation light-emitting unit in the color coordinate is located in the area enclosed by the first color coordinate point (0.3275, 0.3577), the sixth color coordinate point (0.4500, 0.5500) and the seventh color coordinate point (0.5000, 0.5000).

[0034] On the other hand, a method for preparing a light-emitting substrate is provided. The method for preparing the light-emitting substrate includes: forming a base substrate; the base substrate includes multiple pixel unit areas. On one side of the base substrate, multiple light-emitting units are formed; the multiple light-emitting units include a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and at least one compensation light-emitting unit located in one pixel unit area. The distance between the coordinate point of the first color light emitted by one of the first light-emitting units in the color coordinates and the coordinate point of the first color light emitted by another of the first light-emitting units in the color coordinates is greater than 0.035; and / or the distance between the coordinate point of the second color light emitted by one of the second light-emitting units in the color coordinates and the coordinate point of the second color light emitted by another of the second light-emitting units in the color coordinates is greater than 0.023; and / or the distance between the coordinate point of the third color light emitted by one of the third light-emitting units in the color coordinates and the coordinate point of the third color light emitted by another of the third light-emitting units in the color coordinates is greater than 0.005.

[0035] In some embodiments, forming the plurality of light-emitting units on one side of the base substrate includes: forming a plurality of first light-emitting units, a plurality of second light-emitting units, a plurality of third light-emitting units, and a plurality of compensation light-emitting units on different sapphire substrates, respectively. The plurality of first light-emitting units, the plurality of second light-emitting units, the plurality of third light-emitting units, and the plurality of compensation light-emitting units are directly transferred to one side of the base substrate to form the plurality of light-emitting units.

[0036] In yet another aspect, a method for driving a light-emitting substrate is provided. The method includes adjusting the brightness of at least one of a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and a compensation light-emitting unit by adjusting a driving current or a duty cycle. A distance between a coordinate point of a first color light emitted by one of the first light-emitting units and a coordinate point of a first color light emitted by another of the first light-emitting units in a color coordinate system is greater than 0.035.

[0037] In some embodiments, a distance between a coordinate point of the second color light emitted by one second light emitting unit in the color coordinates and a coordinate point of the second color light emitted by another second light emitting unit in the color coordinates is greater than 0.023.

[0038] In some embodiments, a distance between a coordinate point of the third color light emitted by one of the third light emitting units in the color coordinates and a coordinate point of the third color light emitted by another of the third light emitting units in the color coordinates is greater than 0.005.

[0039] In another aspect, a display panel is provided, comprising: a light-emitting substrate as described in any one of the above embodiments.

[0040] In some embodiments, the display panel includes a display area, and a ratio of a light-emitting area of ​​the compensation light-emitting unit to an area of ​​the display area is greater than or equal to 0.1% and less than or equal to 5%. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and do not limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, etc. involved in the embodiments of the present disclosure.

[0042] FIG1 is a structural diagram of a display panel according to some embodiments;

[0043] FIG2 is a structural diagram of a light-emitting substrate according to some embodiments;

[0044] 3 and 4 are cross-sectional views of the light emitting substrate along line AA' in FIG. 2 according to some embodiments;

[0045] 5 and 6 are structural diagrams of light-emitting units in a light-emitting substrate according to some embodiments;

[0046] FIG7 is a structural diagram of a pixel circuit and a light-emitting unit in a light-emitting substrate according to some embodiments;

[0047] 8 and 9 are structural diagrams of light-emitting units in a light-emitting substrate according to some embodiments;

[0048] 10 and 11 are structural diagrams of a pixel circuit and a light-emitting unit in a light-emitting substrate according to some embodiments;

[0049] FIG12 is a chromaticity diagram of light emitted by the third light-emitting unit and the compensation light-emitting unit in the light-emitting substrate according to some embodiments;

[0050] FIG13 is a graph showing how the brightness ratio of light-emitting units in a light-emitting substrate varies with temperature according to some embodiments;

[0051] 14 to 16 are chromaticity diagrams of light emitted by a light-emitting unit in a light-emitting substrate according to some embodiments;

[0052] FIG17 is a chromaticity diagram of light emitted by the third light-emitting unit and the compensation light-emitting unit in the light-emitting substrate according to some embodiments;

[0053] FIG18 is a chromaticity diagram of light emitted by the third light-emitting unit and the compensation light-emitting unit in the light-emitting substrate according to some embodiments;

[0054] FIG19 is a flow chart of a method for preparing a light-emitting substrate according to some embodiments;

[0055] FIG. 20 is a flow chart of a method for preparing a light-emitting substrate according to some embodiments. DETAILED DESCRIPTION

[0056] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0057] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that a particular feature, structure, material or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0058] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0059] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0060] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0061] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0062] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0063] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0064] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0065] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0066] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0067] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0068] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0069] During the epitaxial growth of wafers to form light-emitting units, the wafers are easily affected by factors such as airflow and temperature, resulting in differences in the photoelectric properties of light-emitting units from different batches. In Mini LED and Micro LED display panels, it is necessary to first detect the photoelectric properties of the light-emitting units through a test current. Then, the light-emitting units are strictly screened, graded, and grouped according to the different photoelectric properties to facilitate the mass transfer of light-emitting units and ensure the display effect of the display panel. In order to ensure the uniformity of the display effect of the display panel, the light-emitting units emitting the same color light in the same display panel use light-emitting units with photoelectric properties at the same level.

[0070] However, the inventors of the present disclosure have discovered through research that the operating current of the light-emitting unit using an active drive method is less than the test current, resulting in the photoelectric properties of the light-emitting unit driven by the test current being unable to accurately characterize the photoelectric properties of the light-emitting unit subsequently driven by the working current in the display panel. Multiple light-emitting units emitting the same color light with roughly the same test photoelectric properties have significant differences in their actual photoelectric properties when driven by the working current, resulting in uneven chromaticity between different light-emitting units emitting the same color light. Furthermore, the operating current of the light-emitting unit using an active drive method is relatively low, resulting in insufficient brightness of the display panel.

[0071] Furthermore, when the light-emitting units are small, it is difficult to test the photoelectric properties of each light-emitting unit, which reduces the efficiency of light-emitting substrate production. Even when the light-emitting units are too small to test their photoelectric properties, they cannot be graded, and the same color may have multiple grades on the same light-emitting substrate, resulting in low light uniformity.

[0072] Based on this, the embodiments of the present disclosure provide a light-emitting substrate, a manufacturing method and a driving method thereof, and a display panel to overcome the above-mentioned problems.

[0073] FIG1 is a structural diagram of a display panel according to some embodiments. Referring to FIG1 , some embodiments of the present disclosure provide a display panel 1000. Display panel 1000 can be used to display static images or dynamic images. For example, display panel 1000 can be a Mini LED display panel or a Micro LED display panel.

[0074] For example, the display panel 1000 may be included in a terminal device, which may be a tablet computer, a smart phone, a head-mounted display, a car navigation unit, a camera, an in-vehicle center information display, a watch-type display device or other wearable device, a personal digital assistant, a portable multimedia player, and a game console, as well as a medium-sized or large electronic device such as a television, an external billboard, a monitor, a home appliance including a display screen, a personal computer, and a laptop computer. The above electronic devices are merely examples of applications for the display panel 1000, and therefore, those skilled in the art will recognize that the display panel 1000 may also be applied to other electronic devices without departing from the spirit and scope of the present disclosure.

[0075] As shown in FIG1 , the display panel 1000 includes a display area AA for displaying images and a non-display area SA for not displaying images. The non-display area SA surrounds at least one side of the display area AA. For example, the non-display area SA may enclose the display area AA or may be located outside the display area AA in at least one direction.

[0076] For example, the shape of the display panel 1000 in a plan view may include a rectangle, a circle, an ellipse, a diamond, a trapezoid, a square, or other shapes according to display requirements.

[0077] Fig. 2 is a structural diagram of a light emitting substrate according to some embodiments. Fig. 3 and Fig. 4 are cross-sectional views of the light emitting substrate along line AA' in Fig. 2 according to some embodiments.

[0078] Referring to Figures 2 and 3 , some embodiments of the present disclosure provide a light-emitting substrate 100. The light-emitting substrate 100 is a display component capable of emitting display light. The light-emitting substrate 100 can emit monochromatic light (light of a single color) or colored light. The light-emitting substrate 100 can be used in the display panel 1000 described above. For example, the light-emitting substrate 100 can be a Mini LED light-emitting substrate or a Micro LED light-emitting substrate.

[0079] In some embodiments, as shown in Figures 2 and 3, the light-emitting substrate 100 may include a base substrate 10 and a plurality of light-emitting units 20. The plurality of light-emitting units 20 are located on one side of the base substrate 10 and may include a first light-emitting unit 21, a second light-emitting unit 22, a third light-emitting unit 23, and at least one compensation light-emitting unit 24. The number of compensation light-emitting units 24 may be one or more.

[0080] The compensation light-emitting unit 24 can be disposed around at least one of the first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 23. It is understood that the compensation light-emitting unit 24 can be located around the first light-emitting unit 21; and / or around the second light-emitting unit 22; and / or around the third light-emitting unit 23. The compensation light-emitting unit 24 can emit compensation light, thereby increasing the brightness of the light-emitting substrate 100.

[0081] By individually lighting up the first, second, and third light-emitting units 21, 22, and 23, the luminance of the first light-emitting unit 21 (LR), the luminance of the second light-emitting unit 22 (LG), and the luminance of the third light-emitting unit 23 (LB) can be obtained. The luminance of the compensation light-emitting unit 24 can be determined based on the luminance requirements of different colors of light in the light-emitting substrate 100. The luminance compensation amount Lw1 of the compensation light-emitting unit 24 for the first light-emitting unit 21 is calculated as: LR*R1, where R1 is the ratio of the luminance compensation of the compensation light-emitting unit 24 to the first light-emitting unit 21. The luminance compensation amount Lw2 of the compensation light-emitting unit 24 for the second light-emitting unit 22 is calculated as: LG*R2, where R2 is the ratio of the luminance compensation of the compensation light-emitting unit 24 to the second light-emitting unit 22. The luminance compensation amount Lw3 of the compensation light-emitting unit 24 for the third light-emitting unit 23 is calculated as: LB*R3, where R3 is the ratio of the luminance compensation of the compensation light-emitting unit 24 to the third light-emitting unit 23. The values ​​of R1, R2, and R3 are all less than or equal to 1. R1, R2 and R3 may be the same or different.

[0082] The following is a detailed description of the base substrate 10 and the plurality of light-emitting units 20 in the light-emitting substrate 100 .

[0083] As shown in Figures 3 and 4, the base substrate 10 may include a plurality of repeatedly arranged pixel unit areas PU. The pixel unit area PU may include a plurality of sub-pixel areas and a non-luminous area FA located around each sub-pixel area. For example, each pixel unit area PU may include a first sub-pixel area P1, a second sub-pixel area P2, a third sub-pixel area P3, and at least one fourth sub-pixel area P4. The number of fourth sub-pixel areas P4 may be one or more. The compensating light-emitting unit 24 may be located in the fourth sub-pixel area P4, and the number of the compensating light-emitting units 24 may be the same as the number of the fourth sub-pixel areas P4.

[0084] In some examples, as shown in FIG3 , each pixel unit region PU may include a first light emitting unit 21, a second light emitting unit 22, a third light emitting unit 23, and a compensation light emitting unit 24. For example, the first light emitting unit 21 may be located in the first sub-pixel region P1, the second light emitting unit 22 may be located in the second sub-pixel region P2, the third light emitting unit 23 may be located in the third sub-pixel region P3, and the compensation light emitting unit 24 may be located in the fourth sub-pixel region P4.

[0085] The non-emission area FA may be located between the first sub-pixel area P1 and the second sub-pixel area P2 , between the second sub-pixel area P2 and the third sub-pixel area P3 , and between the third sub-pixel area P3 and the fourth sub-pixel area P4 .

[0086] In some examples, each pixel unit area PU may include one first light emitting unit 21, one second light emitting unit 22, one third light emitting unit 23, and two compensation light emitting units 24. For example, the first light emitting unit 21 may be located in the first sub-pixel area P1, the second light emitting unit 22 may be located in the second sub-pixel area P2, the third light emitting unit 23 may be located in the third sub-pixel area P3, and the two compensation light emitting units 24 may be located in the two fourth sub-pixel areas P4, respectively.

[0087] In this case, the non-emission area FA may also be located between the first sub-pixel area P1 and the fourth sub-pixel area P4 and between the third sub-pixel area P3 and the fourth sub-pixel area P4.

[0088] In some examples, as shown in FIG4 , each pixel unit region PU may include one first light emitting unit 21, one second light emitting unit 22, one third light emitting unit 23, and three compensation light emitting units 24. For example, the first light emitting unit 21 may be located in the first sub-pixel region P1, the second light emitting unit 22 may be located in the second sub-pixel region P2, the third light emitting unit 23 may be located in the third sub-pixel region P3, and the three compensation light emitting units 24 may be located in the three fourth sub-pixel regions P4, respectively.

[0089] In this case, the non-emission area FA may also be located between the first sub-pixel area P1 and the fourth sub-pixel area P4 , between the second sub-pixel area P2 and the fourth sub-pixel area P4 , and between the third sub-pixel area P3 and the fourth sub-pixel area P4 .

[0090] In some examples, the substrate 10 may be a flexible substrate. For example, the flexible substrate may be made of an organic material. For example, the flexible substrate may be made of polyimide (PI), polycarbonate (PC), or polyvinyl chloride (PVC).

[0091] In other examples, the base substrate 10 may be a rigid base substrate. For example, the material of the rigid base substrate may include glass or polymethyl methacrylate (PMMA).

[0092] Figures 5 and 6 are structural diagrams of light-emitting units in a light-emitting substrate according to some embodiments. Figure 7 is a structural diagram of a pixel circuit and a light-emitting unit in a light-emitting substrate according to some embodiments. Figures 8 and 9 are structural diagrams of light-emitting units in a light-emitting substrate according to some embodiments.

[0093] As shown in Figures 3 to 9, a plurality of light-emitting units 20 may be located on a side of the insulating layer 30 away from the base substrate 10. The light-emitting unit 20 may include a first electrode AE ​​(e.g., an anode) and a second electrode CE (e.g., a cathode). For example, the light-emitting unit 20 may include a Mini LED or a Micro LED.

[0094] 5 and 6 , the light emitting unit 20 may further include a first semiconductor layer 201, a light generating layer 202, and a second semiconductor layer 203 stacked in sequence. For example, the first semiconductor layer 201 may be coupled to the second electrode CE, and the second semiconductor layer 203 may be coupled to the first electrode AE.

[0095] When different voltages are applied to the first electrode AE ​​and the second electrode CE respectively to form an electric field therebetween, a PN junction with a potential barrier can be formed between the first semiconductor layer 201 and the second semiconductor layer 203. The carriers in the first semiconductor layer 201 and the carriers in the second semiconductor layer 203 will enter the light generating layer 202 and recombine. At this time, the excess energy will be released in the form of light, thereby directly converting the electrical energy into light energy, so that the light-emitting unit 20 can emit light.

[0096] In some examples, the first semiconductor layer 201 may be one of an N-type semiconductor and a P-type semiconductor, and the second semiconductor layer 203 may be the other of an N-type semiconductor and a P-type semiconductor. For example, the first semiconductor layer 201 may be an N-type semiconductor, and the second semiconductor layer 203 may be a P-type semiconductor. For another example, the first semiconductor layer 201 may be a P-type semiconductor, and the second semiconductor layer 203 may be an N-type semiconductor.

[0097] Exemplarily, the materials of the first semiconductor layer 201 and the second semiconductor layer 203 may both include gallium nitride (GaN).

[0098] Exemplarily, the light generating layer 202 may be a multiple quantum well layer (MQW for short).

[0099] In some examples, as shown in FIG6 , the light-emitting unit 20 may further include a current spreading layer 204. The current spreading layer 204 may be located between the second semiconductor layer 203 and the first electrode AE. For example, the current spreading layer 204 may be made of a material with high conductivity, such as indium tin oxide (ITO). The high conductivity of the current spreading layer 204 can reduce the resistance of the light-emitting unit 20, facilitate hole transport, and thus improve the electrical performance of the light-emitting unit 20.

[0100] It should be noted that the structure of the light-emitting unit 20 in any embodiment herein can be the same as the structure of the light-emitting unit 20 shown in Figures 5 or 6. However, some embodiments of the present disclosure are not limited thereto. Figures 5 and 6 only illustrate the light-emitting unit 20 in a flip-chip Mini LED structure. In other embodiments, the light-emitting unit 20 can also be configured as a light-emitting unit in a face-down structure or a light-emitting unit in a vertical structure.

[0101] In some examples, within each pixel unit area PU, the first electrodes AE of the multiple light-emitting units 20 may be shared, and the second electrodes CE of the multiple light-emitting units 20 may be independent of each other. For example, within each pixel unit area PU, the first electrode of the first light-emitting unit 21, the first electrode of the second light-emitting unit 22, the first electrode of the third light-emitting unit 23, and the first electrode of the compensation light-emitting unit 24 may be shared, and the second electrode of the first light-emitting unit 21, the second electrode of the second light-emitting unit 22, the second electrode of the third light-emitting unit 23, and the second electrode of the compensation light-emitting unit 24 may be independent of each other.

[0102] In some examples, as shown in Figures 7, 8, and 9, within each pixel unit area PU, the first electrodes AE of multiple light-emitting units 20 can be independent of each other, and the second electrodes CE of the multiple light-emitting units 20 can be shared. For example, as shown in Figure 8, within each pixel unit area PU, the first electrode AE1 of the first light-emitting unit 21, the first electrode AE2 of the second light-emitting unit 22, the first electrode AE3 of the third light-emitting unit 23, and the first electrode AE4 of the compensation light-emitting unit 24 can be independent of each other, and the second electrode CE of the first light-emitting unit 21, the second electrode CE of the second light-emitting unit 22, the second electrode CE of the third light-emitting unit 23, and the second electrode CE of the compensation light-emitting unit 24 can be shared. For another example, as shown in Figure 7, within each pixel unit area PU, the first electrode AE1 of the first light-emitting unit 21, the first electrode AE2 of the second light-emitting unit 22, the first electrode AE3 of the third light-emitting unit 23, and the first electrodes AE4 of the three compensation light-emitting units 24 can be independent of each other, and the second electrode CE of the first light-emitting unit 21, the second electrode CE of the second light-emitting unit 22, the second electrode CE of the third light-emitting unit 23, and the second electrode CE of the three compensation light-emitting units 24 can be shared.

[0103] In some examples, the first electrodes AE of the plurality of light-emitting units 20 may be independent of each other, and the second electrodes CE of the plurality of light-emitting units 20 may also be independent of each other. For example, the first electrodes of the plurality of first light-emitting units 21, the first electrodes of the plurality of second light-emitting units 22, the first electrodes of the plurality of third light-emitting units 23, and the first electrodes of the plurality of compensation light-emitting units 24 may be independent of each other, and the second electrodes of the plurality of first light-emitting units 21, the second electrodes of the plurality of second light-emitting units 22, the second electrodes of the plurality of third light-emitting units 23, and the second electrodes of the plurality of compensation light-emitting units 24 may also be independent of each other.

[0104] The first light-emitting unit 21, the second light-emitting unit 22, the third light-emitting unit 23, and the compensation light-emitting unit 24 can each emit light of different colors. For example, the first light-emitting unit 21 can be configured to emit light of a first color. The second light-emitting unit 22 can be configured to emit light of a second color. The third light-emitting unit 23 can be configured to emit light of a third color. The compensation light-emitting unit 24 can be configured to emit compensation light.

[0105] Exemplarily, the first color light may be red light, the second color light may be green light, the third color light may be blue light, and the compensation light may be white light and / or yellow compensation light.

[0106] For example, the material of the light-emitting element of the light-emitting unit 20 may include an indium gallium nitride (InGaN) material system, an aluminum indium gallium nitride (AlInGaN) material system, or an aluminum indium gallium phosphide (AlInGaP) material system. For example, the material of the light-emitting element of the compensation light-emitting unit 24 may include an AlInGaN material system or an AlInGaP material system.

[0107] The InGaN material system and the AlInGaP material system have higher stability. The light emitting unit 20 made of the InGaN material system or the AlInGaP material system emits light with better chromaticity uniformity.

[0108] 10 and 11 are structural diagrams of a pixel circuit and a light-emitting unit in a light-emitting substrate according to some embodiments, respectively.

[0109] As shown in FIG. 3 , FIG. 4 , FIG. 7 , FIG. 10 and FIG. 11 , the light emitting substrate 100 may include a plurality of pixel circuits S, a first power line VDD and a second power line VSS between a base substrate 10 and a plurality of light emitting units 20 .

[0110] The plurality of light emitting units 20 may be coupled to the plurality of pixel circuits S. For example, the plurality of light emitting units 20 may be coupled to the plurality of pixel circuits S in a one-to-one correspondence. For another example, at least two light emitting units 20 may be coupled to one pixel circuit S.

[0111] A first terminal of the pixel circuit S is coupled to the first power line VDD, and a second terminal of the pixel circuit S is coupled to the first terminal of the light-emitting unit 20. The second terminal of the light-emitting unit 20 is coupled to the second power line VSS. For example, the multiple pixel circuits S may include a first pixel circuit S1, a second pixel circuit S2, a third pixel circuit S3, and a fourth pixel circuit S4. A first terminal of the first pixel circuit S1 is coupled to the first power line VDD, and a second terminal of the first pixel circuit S1 is coupled to the first terminal of the first light-emitting unit 21. A second terminal of the first light-emitting unit 21 is coupled to the second power line VSS. The first pixel circuit S1 can transmit a first power signal on the first power line VDD to the first light-emitting unit 21, and the first light-emitting unit 21 can operate under the first power signal and the second power signal on the second power line VSS. Accordingly, the connection structure between the second pixel circuit S2 and the second light-emitting unit 22, the connection structure between the third pixel circuit S3 and the third light-emitting unit 23, and the connection structure between the fourth pixel circuit S4 and the compensation light-emitting unit 24 can refer to the connection structure between the first pixel circuit S1 and the first light-emitting unit 21, and will not be further described here.

[0112] There are many structures of the pixel circuit S, which can be selected according to actual needs. Exemplarily, the pixel circuit S may include: at least two transistors and at least one capacitor. For example, the pixel circuit S may have a structure such as "2T1C", "6T1C", "7T1C", "6T2C" or "7T2C". Among them, "T" represents a thin film transistor, the number before "T" represents the number of thin film transistors, and "C" represents a storage capacitor. The number before "C" represents the number of storage capacitors. For example, the thin film transistor of the pixel circuit S may be a thin film transistor including polycrystalline silicon or a thin film transistor including an oxide semiconductor.

[0113] The light-emitting substrate 100 may further include an insulating layer 30. The insulating layer 30 may be located between the plurality of light-emitting units 20 and the base substrate 10. The insulating layer 30 may have a planarized surface to facilitate formation of the plurality of light-emitting units 20 thereon. The insulating layer 30 may be formed from an organic layer. For example, the insulating layer 30 may include an acrylic resin, an epoxy resin, an imide resin, or an ester resin. The insulating layer 30 may have through-holes that expose the pixel circuits S, thereby facilitating electrical connection between the pixel circuits S and the electrodes of the light-emitting units 20.

[0114] FIG. 12 is a chromaticity diagram of light emitted by the third light-emitting unit and the compensation light-emitting unit in the light-emitting substrate according to some embodiments.

[0115] In some embodiments, as shown in Figures 3 and 4, and Figures 7 to 11, each pixel unit area PU may include a first light-emitting unit 21, a second light-emitting unit 22, a third light-emitting unit 23, and at least one compensation light-emitting unit 24. It is understood that each pixel unit area may include a first light-emitting unit 21, a second light-emitting unit 22, a third light-emitting unit 23, and one compensation light-emitting unit 24; or each pixel unit area may include a first light-emitting unit 21, a second light-emitting unit 22, a third light-emitting unit 23, and multiple compensation light-emitting units 24. In each pixel unit area, the number of at least one of the first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 23 may be one or more, without limitation herein.

[0116] According to the principle of light mixing, each sub-light beam can form a mixed light beam, and the brightness of the mixed light beam is the sum of the brightness of each sub-light beam. Furthermore, there is a negative linear correlation between the distance between the color coordinate point of the mixed light beam and the color coordinate point of each sub-light beam and the brightness of each sub-light beam. For example, as shown in Figure 12, when the compensating light beam and the third color light beam are mixed, the ratio of the distance a from the color coordinate point of the mixed light beam to the color coordinate point of the compensating light beam and the distance b from the color coordinate point of the mixed light beam to the color coordinate point of the third color light beam is inversely proportional to the ratio of the brightness L1 of the compensating light beam to the brightness L2 of the third color light beam, that is, a:b = L2:L1.

[0117] The compensation light emitted by the compensation light-emitting unit 24 can be white compensation light or yellow compensation light. The compensation light emitted by the compensation light-emitting unit 24 can be mixed with at least one of the first color light, the second color light, and the third color light. By adjusting the brightness and chromaticity range of the compensation light emitted by the compensation light-emitting unit 24 as needed, the brightness and chromaticity range of each color light after mixing can be adjusted, thereby improving the luminance of the light-emitting substrate 100 and improving the chromaticity uniformity of the display light emitted by the light-emitting substrate 100. On the basis of improving the brightness and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple light-emitting units 20 of the same color in the same light-emitting substrate 100 can be relaxed, and the number of levels of the light-emitting units 20 of the same color divided by chromaticity can be reduced.

[0118] In other embodiments, when the light-emitting substrate 100 primarily displays a single color of light, it may compensate for the brightness of the primarily displayed light by auxiliary displaying relatively weaker light of other colors (for example, when the light-emitting substrate 100 primarily displays blue light, it may compensate for the brightness of the blue light by auxiliary displaying relatively weaker red and green lights). This brightness compensation method provides little compensation for the luminous brightness of the light-emitting substrate 100 and significantly reduces the color gamut coverage of the light-emitting substrate 100. Furthermore, because the chromaticity range of each color of light emitted by the light-emitting substrate 100 is inherently large, the chromaticity range of each color of light after mixing is also large, resulting in poor chromatic uniformity in the displayed light emitted by the light-emitting substrate 100.

[0119] In the disclosed embodiment, however, a compensating light-emitting unit 24 capable of emitting white or yellow compensating light can be used to adjust the brightness and chromaticity range of the white or yellow compensating light emitted by the compensating light-emitting unit 24 as needed, resulting in a mixed light with higher brightness and a smaller chromaticity range. This significantly improves the brightness of the light-emitting substrate 100 and the chromaticity uniformity of the display light emitted by the light-emitting substrate 100. Furthermore, the white and yellow compensating light emitted by the compensating light-emitting unit 24 have little impact on the color gamut coverage area of ​​the light-emitting substrate 100, thereby ensuring a larger color gamut coverage area of ​​the light-emitting substrate 100.

[0120] The color gamut coverage area parameters of the light-emitting substrate using different brightness compensation schemes are detailed in Table 1.

[0121] Table 1

[0122] In Table 1, "Scheme 1" uses white compensation light for brightness compensation; "Scheme 2" uses the first light-emitting unit 21 and the second light-emitting unit 22 for brightness compensation; and "Scheme 3" uses yellow compensation light for brightness compensation. Based on the data in Table 1, it can be seen that compared to Schemes 1 and 2, the light-emitting substrate in Scheme 3, which uses yellow compensation light for brightness compensation, has a larger color gamut coverage.

[0123] Figure 13 shows the relationship between the brightness ratio and temperature of multiple light-emitting units in a light-emitting substrate according to some embodiments. Since the temperature of a light-emitting unit is positively correlated with the duration of a single lighting operation of the light-emitting unit, the relationship between the brightness ratio and the duration of a single lighting operation of the light-emitting unit can also be shown in Figure 13.

[0124] In some examples, as shown in FIG. 3 , FIG. 7 , and FIG. 8 , one pixel unit area PU may include one first light emitting unit 21 , one second light emitting unit 22 , one third light emitting unit 23 , and one compensation light emitting unit 24 .

[0125] For example, as shown in FIG13 , the attenuation rate of the luminance of the first light-emitting unit 21 relative to the duration of a single lighting cycle is greater than the attenuation rate of the luminance of the second light-emitting unit 22 relative to the duration of a single lighting cycle, and the attenuation rate of the luminance of the first light-emitting unit 21 relative to the duration of a single lighting cycle is greater than the attenuation rate of the luminance of the third light-emitting unit 23 relative to the duration of a single lighting cycle. A compensation light-emitting unit 24 can be provided around the first light-emitting unit 21.

[0126] For example, the brightness of the compensation light of the compensation light-emitting unit 24 can be adjusted in real time according to the attenuation rate of the luminous brightness of the first light-emitting unit 21 corresponding to the single lighting duration shown in Figure 13, so as to compensate the luminous brightness of the first light-emitting unit 21 in time.

[0127] For another example, the compensation light-emitting unit 24 can always maintain a greater compensation amount for the first light-emitting unit 21 than for the second light-emitting unit 22, and also maintain a greater compensation amount for the first light-emitting unit 21 than for the third light-emitting unit 22. In this way, although the intensity of the first color light of the light-emitting substrate will be slightly stronger when the attenuation rate of the first light-emitting unit 21 is not much different from that of the second light-emitting unit 22 (or the third light-emitting unit 23), the overall display effect can still be improved when the light-emitting substrate has the compensation light-emitting unit compared to when it does not have the compensation light-emitting unit.

[0128] In this way, the compensation light emitted by the compensation light-emitting unit 24 and the first color light emitted by the first light-emitting unit 21 can be mixed, and the brightness of the compensation light can compensate for the brightness of the first color light, thereby reducing the difference between the brightness attenuation rate of the first color light and the brightness attenuation rate of the second color light, and reducing the difference between the brightness attenuation rate of the first color light and the brightness attenuation rate of the third color light, thereby improving the color deviation problem caused by the fast brightness attenuation of the first color light and ensuring the display effect of the light-emitting substrate 100.

[0129] In some examples, as shown in FIG. 10 , one pixel unit region may include one first light emitting unit 21 , one second light emitting unit 22 , one third light emitting unit 23 , and two compensation light emitting units 24 .

[0130] For example, the brightness of the first light-emitting unit 21 can be lower than that of the second light-emitting unit 22, and the brightness of the second light-emitting unit 22 can be higher than that of the third light-emitting unit 23. One compensation light-emitting unit 24 can be located around the first light-emitting unit 21, and the other compensation light-emitting unit 24 can be located around the third light-emitting unit 23. It is understood that each of the two compensation light-emitting units 24 can emit white compensation light or yellow compensation light.

[0131] In this way, the compensation light emitted by a compensation light-emitting unit 24 can be mixed with the first color light emitted by the first light-emitting unit 21, which can relatively compensate for the brightness of the first color light and reduce the difference between the brightness of the first color light and the brightness of the second color light; the compensation light emitted by another compensation light-emitting unit 24 can be mixed with the third color light emitted by the third light-emitting unit 23, which can relatively compensate for the brightness of the third color light and reduce the difference between the brightness of the third color light and the brightness of the second color light, thereby ensuring the display effect of the light-emitting substrate 100.

[0132] In some examples, as shown in FIG. 4 , FIG. 9 , and FIG. 11 , one pixel unit area PU may include one first light emitting unit 21 , one second light emitting unit 22 , one third light emitting unit 23 , and three compensation light emitting units 24 .

[0133] The three compensation light emitting units 24 may include a first compensation light emitting unit 241, a second compensation light emitting unit 242, and a third compensation light emitting unit 243. It can be understood that each of the three compensation light emitting units 24 may emit white compensation light or yellow compensation light.

[0134] Along a direction parallel to the base substrate 10 , the first compensation light emitting unit 241 may be located around the first light emitting unit 21 , the second compensation light emitting unit 242 may be located around the second light emitting unit 22 , and the third compensation light emitting unit 243 may be located around the third light emitting unit 23 .

[0135] In this way, the compensation light emitted by the first compensation light-emitting unit 241 can be mixed with the first color light emitted by the first light-emitting unit 21, which can relatively compensate for the brightness of the first color light; the compensation light emitted by the second compensation light-emitting unit 242 can be mixed with the second color light emitted by the second light-emitting unit 22, which can relatively compensate for the brightness of the second color light; the compensation light emitted by the third compensation light-emitting unit 243 can be mixed with the third color light emitted by the third light-emitting unit 23, which can relatively compensate for the brightness of the third color light, thereby improving the luminous brightness of the light-emitting substrate 100.

[0136] For example, the ratio of the luminous brightness of the first compensating light-emitting unit 241 to the luminous brightness of the first light-emitting unit 21, the ratio of the luminous brightness of the second compensating light-emitting unit 242 to the luminous brightness of the second light-emitting unit 22, and the ratio of the luminous brightness of the third compensating light-emitting unit 243 to the luminous brightness of the third light-emitting unit 23 are different from each other.

[0137] For example, the ratio of the luminous brightness of the first compensating light-emitting unit 241 to the luminous brightness of the first light-emitting unit 21 can be 30%, the ratio of the luminous brightness of the second compensating light-emitting unit 242 to the luminous brightness of the second light-emitting unit 22 can be 10%, and the ratio of the luminous brightness of the third compensating light-emitting unit 243 to the luminous brightness of the third light-emitting unit 23 can be 20%.

[0138] In this way, the luminous brightness of the first light-emitting unit 21 can be compensated by the first compensation light-emitting unit 241, the luminous brightness of the second light-emitting unit 22 can be compensated by the second compensation light-emitting unit 242, and the luminous brightness of the third light-emitting unit 23 can be compensated by the third compensation light-emitting unit 243. The number of gears of the light-emitting unit 20 divided according to brightness can be reduced as much as possible, the utilization rate of the light-emitting unit 20 can be improved; and the brightness uniformity of multiple light-emitting units 20 can be improved.

[0139] For example, as shown in FIG13 , the attenuation rate of the luminance of the first light-emitting unit 21 relative to the duration of a single lighting cycle is greater than the attenuation rate of the luminance of the second light-emitting unit 22 relative to the duration of a single lighting cycle. The difference between the ratio of the luminance of the first compensating light-emitting unit 241 to the luminance of the first light-emitting unit 21 at a first moment and the ratio of the luminance of the first compensating light-emitting unit 241 to the luminance of the first light-emitting unit 21 at a second moment is a first proportional difference. The difference between the ratio of the luminance of the second compensating light-emitting unit 242 to the luminance of the second light-emitting unit 22 at a first moment and the ratio of the luminance of the second compensating light-emitting unit 242 to the luminance of the second light-emitting unit 22 at a second moment is a second proportional difference. The first proportional difference is greater than the second proportional difference.

[0140] It can be understood that within the same time period, since the brightness attenuation of the first light-emitting unit 21 is greater than that of the second light-emitting unit 22, the brightness compensation ratio of the first compensation light-emitting unit 241 is greater than that of the second compensation light-emitting unit 242.

[0141] In this way, the compensation amount of the luminous brightness of the first compensation light-emitting unit 241 for the first color can be greater than the compensation amount of the luminous brightness of the second compensation light-emitting unit 242 for the second color, thereby relatively improving the brightness of the first color light, thereby reducing the difference between the brightness attenuation rate of the first color light and the brightness attenuation rate of the second color light, and improving the color deviation problem caused by the rapid brightness attenuation of the first color light, thereby ensuring the display effect of the light-emitting substrate 100.

[0142] For example, as shown in FIG13 , the attenuation rate of the luminance of the second light-emitting unit 22 relative to the duration of a single lighting cycle is greater than the attenuation rate of the luminance of the third light-emitting unit 23 relative to the duration of a single lighting cycle. The difference between the ratio of the luminance of the second compensating light-emitting unit 242 to the luminance of the second light-emitting unit 22 at the first moment and the ratio of the luminance of the second compensating light-emitting unit 242 to the luminance of the second light-emitting unit 22 at the second moment is a third proportional difference. The difference between the ratio of the luminance of the third compensating light-emitting unit 243 to the luminance of the third light-emitting unit 23 at the first moment and the ratio of the luminance of the third compensating light-emitting unit 243 to the luminance of the third light-emitting unit 23 at the second moment is a fourth proportional difference. The third proportional difference is greater than the fourth proportional difference.

[0143] It can be understood that within the same time period, since the luminous brightness attenuation of the second light-emitting unit 22 is greater than that of the third light-emitting unit 23, the luminous compensation ratio of the second compensation light-emitting unit 242 is greater than that of the third compensation light-emitting unit 243.

[0144] In this way, the compensation amount of the luminous brightness of the second compensation light-emitting unit 242 for the second color can be greater than the compensation amount of the luminous brightness of the third compensation light-emitting unit 243 for the third color, so that the brightness of the second color light can be relatively compensated, thereby reducing the difference between the brightness attenuation rate of the second color light and the brightness attenuation rate of the third color light, and improving the color deviation problem caused by the rapid brightness attenuation of the second color light, thereby ensuring the display effect of the light-emitting substrate 100.

[0145] 14 to 16 are chromaticity diagrams of light emitted by the light-emitting units in the light-emitting substrate according to some embodiments.

[0146] In a solution in which the compensating light-emitting unit 24 is not used in the light-emitting substrate, the photoelectric properties of the plurality of first light-emitting units are at the same level. A distance between a coordinate point of the first color light emitted by one first light-emitting unit and a coordinate point of the first color light emitted by another first light-emitting unit in the color coordinates is less than or equal to 0.025 (e.g., 0.020, 0.021, 0.022, 0.023, 0.024, or 0.025).

[0147] In some embodiments, as shown in Figures 14 to 16, the multiple light-emitting units 20 in the light-emitting substrate 100 include a compensation light-emitting unit 24, and the distance between the coordinate point of the first color light emitted by one first light-emitting unit 21 in the color coordinate and the coordinate point of the first color light emitted by another first light-emitting unit 21 in the color coordinate is greater than or equal to 0.035 (for example, 0.035, 0.038, 0.04, 0.042, 0.045, 0.05, 0.052, 0.055, 0.058, 0.06 or 0.065).

[0148] Because the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the first color light, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced, thereby improving the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. In the disclosed embodiment, while the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous solution of the light-emitting substrate 100 without the compensation light-emitting unit 24, the distance between the coordinate points of the first color light emitted by any two first light-emitting units 21 in the same light-emitting substrate 100 is larger. This results in a larger chromaticity range for the first color light emitted by multiple first light-emitting units 21 that can be accepted by the same light-emitting substrate 100. This reduces or even eliminates the number of chromaticity-based binning of the first light-emitting units 21 during the screening and binning stages, thereby improving the utilization rate of the first light-emitting units 21. This also reduces the difficulty or number of steps required to screen the first light-emitting units 21, thereby improving the manufacturing efficiency of the light-emitting substrate 100.

[0149] In some examples, the distance between the coordinate point of the first color light emitted by one first light-emitting unit 21 in the color coordinate and the coordinate point of the first color light emitted by another first light-emitting unit 21 in the color coordinate is greater than or equal to 0.042 (for example, 0.042, 0.045, 0.05, 0.052, 0.055, 0.058, 0.06 or 0.065).

[0150] Compared with the previous solution in which the compensating light-emitting unit 24 is not used in the light-emitting substrate 100, the present disclosure adopts the compensating light-emitting unit 24 to meet the light uniformity requirement of the light-emitting substrate 100. In addition, the distance between the coordinate points of the first color light emitted by any two first light-emitting units 21 in the same light-emitting substrate 100 in the color coordinate is larger, so that the chromaticity range of the first color light emitted by multiple first light-emitting units 21 that can be accepted by the same light-emitting substrate 100 is larger, thereby greatly reducing the number of gears of the first light-emitting unit 21 divided according to chromaticity, thereby greatly improving the production efficiency of the light-emitting substrate 100 and the utilization rate of the first light-emitting unit 21.

[0151] Parameters for dividing the gears according to the chromaticity of the light emitted by the light-emitting unit 20 in the light-emitting substrate 100 of some embodiments of the present disclosure are detailed in Table 2.

[0152] Table 2

[0153] The "color coordinate axis" in Table 2 represents the first coordinate axis X or the second coordinate axis Y; the "number of gears" represents the number of gears divided according to chromaticity, obtained by rounding off the ratio between the range of the color coordinate values ​​of the light emitted by the light-emitting unit and the range of the corresponding MacAdam ellipse area.

[0154] In the embodiment of the present disclosure, the compensation light emitted by the compensation light-emitting unit 24 can form a first mixed light with the first color light. Based on the data in Table 2, it can be seen that the range of the color coordinate values ​​of the first mixed light (i.e., the chromaticity range) is slightly smaller than the range of the color coordinate values ​​of the first color light, and the range of the MacAdam ellipse area of ​​the first mixed light is slightly smaller than the range of the MacAdam ellipse area of ​​the first color light. Therefore, the use of the compensation light-emitting unit 24 can slightly reduce the number of gears of the first light-emitting unit 21.

[0155] In some examples, as shown in Figure 16, the area of ​​the MacAdam ellipse region corresponding to the first color light emitted by the first light-emitting unit 21 can be greater than or equal to the area of ​​the MacAdam ellipse region corresponding to the first mixed light of the first color light emitted by the first light-emitting unit 21 and the compensation light emitted by the corresponding compensation light-emitting unit 24.

[0156] It should be noted that the MacAdam ellipse area can be understood as the range of chromaticities in the chromaticity diagram that is imperceptible to the human eye. The MacAdam ellipse can include N-order MacAdam ellipses, where N is an integer greater than or equal to 1. The N-order MacAdam ellipse area can be understood as the range of chromaticities in the chromaticity diagram that is N times the distance from the target color and is imperceptible to the human eye.

[0157] Combined with the data in Table 2, it can be seen that the use of the compensating light-emitting unit 24 in the embodiment of the present disclosure can reduce the area of ​​the MacAdam ellipse corresponding to the first mixed light, thereby reducing the chromaticity range of the first mixed light that is imperceptible to the human eye in the display light emitted by the display panel 1000, thereby improving the brightness and chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. On the basis of improving the brightness and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple first light-emitting units 21 in the same light-emitting substrate 100 can be relaxed, thereby slightly reducing the number of levels of the first light-emitting units 21 divided by chromaticity, reducing the difficulty of screening the first light-emitting units 21, and thus improving the production efficiency of the light-emitting substrate 100 and the utilization rate of the first light-emitting units 21.

[0158] For example, as shown in FIG16 , the range value of the 5-order MacAdam ellipse area corresponding to the first color light on the first coordinate axis X in the color coordinate can be greater than or equal to the range value of the 5-order MacAdam ellipse area corresponding to the first mixed light on the first coordinate axis X in the color coordinate.

[0159] For example, as shown in FIG16 , the range value of the 5-order MacAdam ellipse area corresponding to the first color light on the second coordinate axis Y in the color coordinate can be greater than or equal to the range value of the 5-order MacAdam ellipse area corresponding to the first mixed light on the second coordinate axis Y in the color coordinate.

[0160] This reduces the range of color coordinates within the five-step MacAdam ellipse corresponding to the first mixed light, reducing the area of ​​the MacAdam ellipse corresponding to the first mixed light. This improves the brightness and chromaticity uniformity of the display panel 1000. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, significantly reducing the number of chromaticity-based levels of the first light-emitting units 21, and reducing the difficulty of selecting the first light-emitting units 21. This significantly improves the manufacturing efficiency of the light-emitting substrate 100 and the utilization rate of the first light-emitting units 21.

[0161] In some examples, based on the data in Table 2, it can be seen that the ratio of the range value of the first color light on the first coordinate axis X in the color coordinates to the range value of the MacAdam ellipse area corresponding to the first color light on the first coordinate axis X is E1; the ratio of the range value of the first mixed light on the first coordinate axis X in the color coordinates to the range value of the MacAdam ellipse area corresponding to the first mixed light on the first coordinate axis X is F1; E1 is slightly larger than F1.

[0162] In some examples, based on the data in Table 2, it can be seen that the ratio of the range value of the first color light on the second coordinate axis Y in the color coordinates to the range value of the MacAdam ellipse area corresponding to the first color light on the second coordinate axis Y is E2; the ratio of the range value of the first mixed light on the second coordinate axis Y in the color coordinates to the range value of the MacAdam ellipse area corresponding to the first mixed light on the second coordinate axis Y is F2; ​​E2 is slightly larger than F2.

[0163] In this way, the first color light can be mixed with the compensation light emitted by the compensation light-emitting unit 24 corresponding to the first light-emitting unit 21. The compensation light-emitting unit 24 can compensate for the brightness of the first light-emitting unit 21, thereby improving the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby improving the display effect of the display panel 1000. On the basis of improving the brightness and chromaticity uniformity of the light-emitting substrate 100, the number of levels of the first light-emitting unit 21 divided by brightness and chromaticity can be slightly reduced, and the color gamut coverage area of ​​the display panel 1000 can be guaranteed.

[0164] In some embodiments, the ratio of the luminance of the compensating light-emitting unit 24 to the luminance of the first light-emitting unit 21 in different pixel unit regions can be substantially the same. For example, the ratio of the luminance of the first compensating light-emitting unit 241 to the luminance of the first light-emitting unit 21 in different pixel unit regions can be substantially the same.

[0165] In some examples, the ratio of the luminous brightness of the first compensating luminous unit 241 to the luminous brightness of the first luminous unit 21 in one pixel unit area, and the ratio of the luminous brightness of the first compensating luminous unit 241 to the luminous brightness of the first luminous unit 21 in another pixel unit area can be in the range of 0.8 to 1.2 (including the boundary values).

[0166] In this way, the luminance of the compensation light-emitting unit 24 has roughly the same compensatory effect on the luminance of the first light-emitting unit 21. This ensures the uniformity of the luminance of the first color light emitted by the light-emitting substrate 100 while improving the luminance of the first color light emitted by the light-emitting substrate 100. Furthermore, the extreme difference in color coordinates between the first mixed light of the compensation light emitted by the compensation light-emitting unit 24 and the first color light emitted by the first light-emitting unit 21 is reduced, thereby reducing the chromaticity range of the display light emitted by the light-emitting substrate 100 and improving the chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. While improving the luminance uniformity and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple first light-emitting units 21 in the same light-emitting substrate 100 can be widened, thereby reducing the number of levels of the first light-emitting units 21 divided by luminance and chromaticity.

[0167] In some examples, the ratio of the luminous brightness of the compensation light-emitting unit 24 to the luminous brightness of the first light-emitting unit 21 can be greater than or equal to 10% and less than or equal to 50% (for example, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% or 50%).

[0168] Limiting the ratio of the luminance of the compensation light-emitting unit 24 to the luminance of the first light-emitting unit 21 within a reasonable range can improve the brightness of the light-emitting substrate 100. It can also reduce the extreme difference in the color coordinates of the first mixed light of the compensation light emitted by the compensation light-emitting unit 24 and the first color light emitted by the first light-emitting unit 21, thereby reducing the chromaticity range of the display light emitted by the light-emitting substrate 100 and improving the chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. On the basis of improving the brightness and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple first light-emitting units 21 in the same light-emitting substrate 100 can be relaxed, thereby reducing the number of levels of the first light-emitting units 21 divided by brightness and chromaticity.

[0169] Exemplarily, the ratio of the luminous brightness of the compensation light-emitting unit 24 to the luminous brightness of the first light-emitting unit 21 can be greater than or equal to 10% and less than or equal to 30% (for example, 10%, 12%, 15%, 16%, 20%, 23%, 25%, 27%, 29% or 30%).

[0170] In this way, the chromaticity range of the light emitted by the light-emitting substrate 100 can be significantly reduced while reasonably improving the brightness of the light emitted by the light-emitting substrate 100, thereby significantly improving the chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. While significantly improving the chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple first light-emitting units 21 in the same light-emitting substrate 100 can be widened, thereby significantly reducing the number of levels of the first light-emitting units 21 divided by brightness and chromaticity.

[0171] When the brightness ratios of the compensation light-emitting unit and the corresponding light-emitting unit in the light-emitting substrate of some embodiments of the present disclosure are different, the gear parameters of the light-emitting unit divided according to chromaticity are detailed in Table 3.

[0172] Table 3

[0173] Based on the data in Table 2 and Table 3, it can be seen that the present disclosure uses different ratios of compensating the brightness of the corresponding light-emitting unit 20 by compensating the brightness of the corresponding light-emitting unit 20, resulting in different degrees of reduction in the number of gears of different color light-emitting units 20. Specifically, in the present disclosure, the degree of reduction in the number of gears of the third light-emitting unit 23 is greater than the degree of reduction in the number of gears of the first light-emitting unit 21 and the degree of reduction in the number of gears of the second light-emitting unit 22.

[0174] In some embodiments, the light emitting area of ​​the compensation light emitting unit 24 may be substantially the same as the light emitting area of ​​the first light emitting unit 21. For example, the ratio of the light emitting area of ​​the compensation light emitting unit 24 to the light emitting area of ​​the first light emitting unit 21 may be within the range of 0.8 to 1.2 (inclusive).

[0175] For example, the light emitting area of ​​the compensation light emitting unit 24 and the light emitting area of ​​the first light emitting unit 21 may be less than or equal to 0.020 mm. 2 (For example 0.010mm 2 , 0.012mm 2 , 0.014mm 2 , 0.016mm 2 , 0.018mm 2 or 0.020mm 2 ).

[0176] In this way, it is convenient to arrange the compensation light-emitting unit 24 on the base substrate 10, and the compensation light emitted by the compensation light-emitting unit 24 in the light-emitting substrate 100 and the first color light emitted by the first light-emitting unit 21 are evenly distributed, thereby improving the display effect of the light-emitting substrate 100 and the display panel 1000.

[0177] In a solution in which the compensating light-emitting unit 24 is not used in the light-emitting substrate, the photoelectric properties of the plurality of second light-emitting units are at the same level. The distance between the color coordinates of the second color light emitted by one second light-emitting unit and the color coordinates of the second color light emitted by another second light-emitting unit is less than or equal to 0.015 (e.g., 0.010, 0.011, 0.012, 0.013, 0.014, or 0.015).

[0178] In some embodiments, the multiple light-emitting units 20 in the light-emitting substrate 100 include a compensation light-emitting unit 24, and the distance between the coordinate point of the second color light emitted by one second light-emitting unit 22 in the color coordinate and the coordinate point of the second color light emitted by another second light-emitting unit 22 in the color coordinate is greater than or equal to 0.023 (for example, 0.023, 0.025, 0.026, 0.028, 0.029, 0.03, 0.032 or 0.035).

[0179] Because the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the second color light, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. In the disclosed embodiment, while the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous embodiment of the light-emitting substrate 100 without the compensation light-emitting unit 24, the distance between the coordinate points of the second color light emitted by any two second light-emitting units 22 in the same light-emitting substrate 100 is larger. This increases the chromaticity range of the second color light emitted by multiple second light-emitting units 22 that can be accepted by the same light-emitting substrate 100. This reduces the number of chromaticity-based binning of the second light-emitting units 22 during the screening and binning stages, thereby improving the utilization rate of the second light-emitting units 22. This also reduces the difficulty or steps in screening the second light-emitting units 22, thereby improving the manufacturing efficiency of the light-emitting substrate 100.

[0180] In some examples, the distance between the coordinate point of the second color light emitted by one second light-emitting unit 22 in the color coordinate and the coordinate point of the second color light emitted by another second light-emitting unit 22 in the color coordinate is greater than or equal to 0.026 (for example, 0.026, 0.027, 0.028, 0.029, 0.03, 0.031, 0.032, 0.033 or 0.035).

[0181] Compared with the previous solution in which the compensating light-emitting unit 24 is not used in the light-emitting substrate 100, the present disclosure adopts the compensating light-emitting unit 24 to meet the light uniformity requirement of the light-emitting substrate 100. In addition, the distance between the coordinate points of the second color light emitted by any two second light-emitting units 22 in the same light-emitting substrate 100 in the color coordinate is larger, so that the chromaticity range of the second color light emitted by multiple second light-emitting units 22 that can be accepted by the same light-emitting substrate 100 is larger, thereby greatly reducing the number of gears of the second light-emitting unit 22 divided according to chromaticity, thereby greatly improving the production efficiency of the light-emitting substrate 100 and the utilization rate of the second light-emitting unit 22.

[0182] In some examples, as shown in Figure 16 and Table 2, the area of ​​the MacAdam ellipse region corresponding to the second color light emitted by the second light-emitting unit 22 can be greater than or equal to the area of ​​the MacAdam ellipse region corresponding to the second mixed light of the second color light emitted by the second light-emitting unit 22 and the compensation light emitted by the corresponding compensation light-emitting unit 24.

[0183] Combined with the data in Table 2, it can be seen that the use of the compensating light-emitting unit 24 in the disclosed embodiment can reduce the area of ​​the MacAdam ellipse corresponding to the second mixed light, thereby reducing the chromaticity range of the second mixed light that is imperceptible to the human eye in the display light emitted by the light-emitting substrate 100 and the display panel 1000, thereby improving the brightness and chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. On the basis of improving the brightness and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple second light-emitting units 22 in the same light-emitting substrate 100 can be relaxed, thereby slightly reducing the number of levels of the second light-emitting units 22 divided by chromaticity, reducing the difficulty of screening the second light-emitting units 22, and thus improving the production efficiency of the light-emitting substrate 100 and the utilization rate of the second light-emitting units 22.

[0184] For example, as shown in FIG16 , the range value of the 5-order MacAdam ellipse area corresponding to the second color light on the first coordinate axis X in the color coordinate can be greater than or equal to the range value of the 5-order MacAdam ellipse area corresponding to the second mixed light on the first coordinate axis X in the color coordinate.

[0185] This reduces the range of the MacAdam ellipse area of ​​the second mixed light, reducing the area of ​​the MacAdam ellipse area corresponding to the second mixed light, thereby improving the brightness and chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, broadens the acceptable chromaticity range of multiple second light-emitting units 22 in the same light-emitting substrate 100, significantly reduces the number of chromaticity-based levels for the second light-emitting units 22, and reduces the difficulty of selecting the second light-emitting units 22, thereby significantly improving the manufacturing efficiency of the light-emitting substrate 100 and the utilization rate of the second light-emitting units 22.

[0186] For example, based on the data in Table 2, it can be seen that the ratio of the range value of the second color light on the first coordinate axis X in the color coordinate to the range value of the MacAdam ellipse area corresponding to the second color light on the first coordinate axis X is G1; the ratio of the range value of the second mixed light on the first coordinate axis X in the color coordinate to the range value of the MacAdam ellipse area corresponding to the second mixed light on the first coordinate axis X is H1; G1 is slightly larger than H1.

[0187] For example, based on the data in Table 2, it can be seen that the ratio of the range value of the second color light on the second coordinate axis Y in the color coordinates to the range value of the MacAdam ellipse area corresponding to the second color light on the second coordinate axis Y is G2; the ratio of the range value of the second mixed light on the second coordinate axis Y in the color coordinates to the range value of the MacAdam ellipse area corresponding to the second mixed light on the second coordinate axis Y is H2; G2 is slightly larger than H2.

[0188] In this way, the second color light can be mixed with the compensation light emitted by the compensation light-emitting unit 24 corresponding to the second light-emitting unit 22. The compensation light-emitting unit 24 can compensate for the brightness of the second light-emitting unit 22, thereby improving the display effect of the display panel 1000. On the basis of improving the brightness of the second light-emitting unit 22, the acceptable chromaticity range of multiple second light-emitting units 22 in the same light-emitting substrate 100 can be relaxed, and the number of levels of the second light-emitting units 22 divided by brightness and chromaticity can be slightly reduced, while ensuring the color gamut coverage area of ​​the display panel 1000.

[0189] In some embodiments, the ratio of the luminance of the compensating light-emitting unit 24 to the luminance of the second light-emitting unit 22 in different pixel unit regions can be substantially the same. For example, the ratio of the luminance of the second compensating light-emitting unit 242 to the luminance of the second light-emitting unit 22 in different pixel unit regions can be substantially the same.

[0190] In some examples, the ratio of the luminous brightness of the second compensating light-emitting unit 242 to the luminous brightness of the second light-emitting unit 22 in one pixel unit area, and the ratio of the luminous brightness of the second compensating light-emitting unit 242 to the luminous brightness of the second light-emitting unit 22 in another pixel unit area can be in the range of 0.8 to 1.2 (including the boundary values).

[0191] In this way, the luminance of the compensation light-emitting unit 24 in different pixel unit areas has roughly the same compensatory effect on the luminance of the second light-emitting unit 22. This ensures the uniformity of the luminance of the second color light emitted by the light-emitting substrate 100 while improving the luminance of the second color light emitted by the light-emitting substrate 100. Furthermore, the extreme difference in color coordinates between the compensation light emitted by the compensation light-emitting unit 24 and the second color light emitted by the second light-emitting unit 22 can be reduced, thereby improving the chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. While improving the luminance uniformity and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple second light-emitting units 22 in the same light-emitting substrate 100 can be widened, reducing the number of chromaticity-based levels for the second light-emitting units 22.

[0192] In some examples, the ratio of the luminous brightness of the compensating light-emitting unit 24 to the luminous brightness of the second light-emitting unit 22 is greater than or equal to 10% and less than or equal to 50% (for example, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% or 50%).

[0193] Limiting the ratio of the luminance of the compensation light-emitting unit 24 to the luminance of the second light-emitting unit 22 within a reasonable range can improve the brightness of the light-emitting substrate 100. It can also reduce the extreme difference in color coordinates between the compensation light emitted by the compensation light-emitting unit 24 and the second color light emitted by the second light-emitting unit 22. This can reduce the chromaticity range of the display light emitted by the light-emitting substrate 100 and improve the chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. On the basis of improving the brightness and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple second light-emitting units 22 in the same light-emitting substrate 100 can be relaxed, and the number of levels of the second light-emitting units 22 divided by chromaticity can be reduced.

[0194] Exemplarily, the ratio of the luminous brightness of the compensation light-emitting unit 24 to the luminous brightness of the second light-emitting unit 22 can be greater than or equal to 10% and less than or equal to 30% (for example, 10%, 12%, 15%, 16%, 20%, 23%, 25%, 27%, 29% or 30%).

[0195] In this way, the chromaticity range of the light emitted by the light-emitting substrate 100 can be significantly reduced while reasonably improving the brightness of the light emitted by the light-emitting substrate 100, thereby significantly improving the chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. While significantly improving the chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple second light-emitting units 22 in the same light-emitting substrate 100 can be widened, significantly reducing the number of levels of the second light-emitting units 22 divided by chromaticity.

[0196] In some embodiments, the light emitting area of ​​the compensation light emitting unit 24 may be substantially the same as the light emitting area of ​​the second light emitting unit 22. For example, the ratio of the light emitting area of ​​the compensation light emitting unit 24 to the light emitting area of ​​the second light emitting unit 22 may be within the range of 0.8 to 1.2 (inclusive).

[0197] For example, the light emitting area of ​​the compensation light emitting unit 24 and the light emitting area of ​​the second light emitting unit 22 may both be less than or equal to 0.020 mm. 2 (For example 0.010mm 2 , 0.012mm 2 , 0.014mm 2 , 0.016mm 2 , 0.018mm 2 or 0.020mm 2 ).

[0198] In this way, it is convenient to arrange the compensation light-emitting unit 24 on the base substrate 10, and the compensation light emitted by the compensation light-emitting unit 24 in the light-emitting substrate 100 and the second color light emitted by the second light-emitting unit 22 are evenly distributed, thereby improving the display effect of the light-emitting substrate 100 and the display panel 1000.

[0199] In a solution in which the compensating light-emitting unit 24 is not used in the light-emitting substrate, the photoelectric properties of the plurality of third light-emitting units are at the same level. The distance between the color coordinates of the third color light emitted by one third light-emitting unit and the color coordinates of the third color light emitted by another third light-emitting unit is less than or equal to 0.003 (e.g., 0.001, 0.002, or 0.003).

[0200] In some embodiments, the multiple light-emitting units 20 in the light-emitting substrate 100 include a compensation light-emitting unit 24, and the distance between the coordinate point of the third color light emitted by a third light-emitting unit 23 in the color coordinate and the coordinate point of the third color light emitted by another third light-emitting unit 23 in the color coordinate is greater than or equal to 0.005 (for example, 0.005, 0.006, 0.007, 0.008, 0.009, 0.010, 0.012 or 0.015).

[0201] Because the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the third color light, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. In the disclosed embodiment, while the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous solution in which the compensation light-emitting unit 24 is not used in the light-emitting substrate 100, the distance between the coordinate points of the third color light emitted by any two third light-emitting units 23 in the same light-emitting substrate 100 is larger. This increases the chromaticity range of the third color light emitted by multiple third light-emitting units 23 that can be accepted by the same light-emitting substrate 100. This reduces the number of chromaticity-based binning of the third light-emitting units 23 during the screening and binning stages, thereby improving the utilization rate of the third light-emitting units 23. This also reduces the difficulty or steps in screening the third light-emitting units 23, thereby improving the manufacturing efficiency of the light-emitting substrate 100.

[0202] In some examples, the distance between the coordinate point of the third color light emitted by one third light-emitting unit 23 in the color coordinate and the coordinate point of the third color light emitted by another third light-emitting unit 23 in the color coordinate is greater than or equal to 0.007 (for example, 0.007, 0.008, 0.009, 0.010, 0.012, 0.015 or 0.018).

[0203] Compared with the previous solution in which the compensating light-emitting unit 24 is not used in the light-emitting substrate 100, the present disclosure adopts the compensating light-emitting unit 24 to meet the light uniformity requirement of the light-emitting substrate 100. In addition, the distance between the coordinate points of the third color light emitted by any two third light-emitting units 23 in the same light-emitting substrate 100 in the color coordinate is larger, so that the chromaticity range of the third color light emitted by multiple third light-emitting units 23 that can be accepted by the same light-emitting substrate 100 is larger, thereby greatly reducing the number of gears of the third light-emitting unit 23 divided according to chromaticity, thereby greatly improving the production efficiency of the light-emitting substrate 100 and the utilization rate of the third light-emitting unit 23.

[0204] In some examples, as shown in Figure 16, the area of ​​the first MacAdam ellipse corresponding to the third color light emitted by the third light-emitting unit 23 can be smaller than the area of ​​the second MacAdam ellipse corresponding to the mixed light (i.e., the third mixed light) of the third color light emitted by the third light-emitting unit 23 and the compensation light emitted by the corresponding compensation light-emitting unit 24.

[0205] Combined with the data in Table 2, it can be seen that the use of the compensating light-emitting unit 24 in the embodiment of the present disclosure can increase the area of ​​the second MacAdam ellipse corresponding to the third mixed light, thereby increasing the chromaticity range of the third mixed light, which is imperceptible to the human eye, in the display light emitted by the display panel 1000. This can improve the brightness and chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. On the basis of improving the brightness and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple third light-emitting units 23 in the same light-emitting substrate 100 can be relaxed, thereby reducing the number of levels of the third light-emitting units 23 divided by chromaticity and reducing the difficulty of screening the third light-emitting units 23, thereby improving the production efficiency of the light-emitting substrate 100 and the utilization rate of the third light-emitting units 23.

[0206] For example, as shown in FIG16 , the range value of the 5th-order first MacAdam ellipse area corresponding to the third color light on the first coordinate axis X in the color coordinate may be smaller than the range value of the 5th-order second MacAdam ellipse area corresponding to the third mixed light on the first coordinate axis X in the color coordinate.

[0207] For example, as shown in FIG16 , the range value of the 5th-order first MacAdam ellipse area corresponding to the third color light on the second coordinate axis Y in the color coordinate can be smaller than the range value of the 5th-order second MacAdam ellipse area corresponding to the third mixed light on the second coordinate axis Y in the color coordinate.

[0208] This results in a larger range of color coordinates for the 5-step second MacAdam ellipse corresponding to the third mixed light, increasing the area of ​​the 5-step second MacAdam ellipse corresponding to the third mixed light. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, broadens the permissible chromaticity ranges of the multiple third light-emitting units 23 in the same light-emitting substrate 100, and significantly reduces the number of chromaticity-based levels for the third light-emitting units 23, thereby improving the utilization rate of the third light-emitting units 23.

[0209] In some examples, based on the data in Table 2, it can be seen that the ratio of the range value of the third color light on the first coordinate axis X in the color coordinate to the range value of the first MacAdam ellipse area on the first coordinate axis X is M1; the ratio of the range value of the mixed light of the third color light and the compensation light on the first coordinate axis X in the color coordinate to the range value of the second MacAdam ellipse area on the first coordinate axis X is N1; M1 can be greater than N1.

[0210] In some examples, based on the data in Table 2, it can be seen that the ratio of the range value of the third color light on the second coordinate axis Y in the color coordinate to the range value of the first MacAdam ellipse area on the second coordinate axis Y is M2; the ratio of the range value of the mixed light of the third color light and the compensation light on the second coordinate axis Y in the color coordinate to the range value of the second MacAdam ellipse area on the second coordinate axis Y is N2; M2 can be greater than N2.

[0211] In this way, the third color light can be mixed with the compensation light emitted by the compensation light-emitting unit 24 corresponding to the third light-emitting unit 23. The compensation light-emitting unit 24 can compensate for the brightness of the third light-emitting unit 23, thereby improving the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby improving the display effect of the display panel 1000. On the basis of improving the brightness and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple third light-emitting units 23 in the same light-emitting substrate 100 can be relaxed, and the number of gears of the third light-emitting unit 23 divided according to M2 and N2 can be reduced, thereby improving the mass production feasibility of the display panel 1000 and the utilization rate of the third light-emitting units 23.

[0212] In some embodiments, the ratio of the luminance of the compensating light-emitting unit 24 to the luminance of the third light-emitting unit 23 in different pixel unit regions can be substantially the same. For example, the ratio of the luminance of the third compensating light-emitting unit 243 to the luminance of the third light-emitting unit 23 in different pixel unit regions can be substantially the same.

[0213] In some examples, the ratio of the luminous brightness of the third compensation light-emitting unit 243 to the luminous brightness of the third light-emitting unit 23 in one pixel unit area, and the ratio of the luminous brightness of the third compensation light-emitting unit 243 to the luminous brightness of the third light-emitting unit 23 in another pixel unit area can be in the range of 0.8 to 1.2 (including the boundary values).

[0214] In this way, the luminance of the compensation light-emitting unit 24 has a roughly equivalent compensatory effect on the luminance of the third light-emitting unit 23. This improves the luminance of the third color light emitted by the light-emitting substrate 100 while ensuring the luminance uniformity of the third color light emitted by the light-emitting substrate 100. Furthermore, the range of the color coordinates of the third mixed light, formed by the compensation light emitted by the compensation light-emitting unit 24 and the third color light emitted by the third light-emitting unit 23, is reduced. This reduces the chromaticity range of the third color light emitted by the light-emitting substrate 100, thereby improving the chromaticity uniformity of the light-emitting substrate 100 and the display panel 1000. While improving both the luminance uniformity and chromaticity uniformity of the light-emitting substrate 100, the acceptable chromaticity range of multiple third light-emitting units 23 in the same light-emitting substrate 100 can be broadened, reducing the number of chromaticity-based levels for the third light-emitting units 23.

[0215] In some embodiments, within a pixel unit area, the ratio of the luminous brightness of the compensation light-emitting unit 24 to the luminous brightness of the third light-emitting unit 23 is greater than or equal to 10% and less than or equal to 50% (for example, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% or 50%).

[0216] Limiting the ratio of the luminance of the compensation light-emitting unit 24 to the luminance of the third light-emitting unit 23 within a reasonable range can improve the brightness of the light-emitting substrate 100. It can also reduce the extreme difference in color coordinates between the compensation light emitted by the compensation light-emitting unit 24 and the third color light emitted by the third light-emitting unit 23. This can reduce the number of levels of the third light-emitting unit 23 divided by brightness and chromaticity, thereby improving the utilization rate of the third light-emitting unit 23. In addition, the chromaticity range of the display light emitted by the display panel 1000 is reduced, which can improve the chromaticity uniformity of the display light emitted by the display panel 1000.

[0217] In some examples, within a pixel unit area, the ratio of the luminous brightness of the third compensation light-emitting unit 243 to the luminous brightness of the third light-emitting unit 23 can be greater than or equal to 10% and less than or equal to 30% (for example, 10%, 12%, 15%, 16%, 20%, 23%, 25%, 27%, 29% or 30%).

[0218] In this way, on the basis of reasonably improving the brightness of the third color light emitted by the light-emitting substrate 100, the chromaticity range of the third mixed light emitted by the light-emitting substrate 100 can be greatly reduced, thereby greatly reducing the number of gears of the third light-emitting unit 23 divided according to brightness and chromaticity, and improving the utilization rate of the third light-emitting unit 23.

[0219] In some embodiments, the light emitting area of ​​the compensation light emitting unit 24 may be substantially the same as the light emitting area of ​​the third light emitting unit 23. For example, the ratio of the light emitting area of ​​the compensation light emitting unit 24 to the light emitting area of ​​the third light emitting unit 23 may be within the range of 0.8 to 1.2 (inclusive).

[0220] For example, the light emitting area of ​​the compensation light emitting unit 24 and the light emitting area of ​​the third light emitting unit 23 may be less than or equal to 0.020 mm. 2 (For example 0.010mm 2 , 0.012mm 2 , 0.014mm 2 , 0.016mm 2 , 0.018mm 2 or 0.020mm 2 ).

[0221] In this way, it is convenient to arrange the compensation light-emitting unit 24 on the base substrate 10, and the compensation light emitted by the compensation light-emitting unit 24 in the light-emitting substrate 100 and the third color light emitted by the third light-emitting unit 23 are evenly distributed, thereby improving the display effect of the light-emitting substrate 100 and the display panel 1000.

[0222] Figure 17 is a chromaticity diagram of light emitted by the third light emitting unit and the compensation light emitting unit in the light emitting substrate according to some embodiments. Figure 18 is a chromaticity diagram of light emitted by the third light emitting unit and the compensation light emitting unit in the light emitting substrate according to some embodiments.

[0223] In some embodiments, as shown in Figures 17 and 18, the color coordinate point of the compensation light can be located within the area enclosed by the color coordinate point of the first color, the color coordinate point of the second color, and the color coordinate point of the third color. In the chromaticity diagram, the color coordinate point of the compensation light emitted by the compensation light emitting unit 24 can be located within the area enclosed by the first color coordinate point (0.3275, 0.3577), the second color coordinate point (0.3750, 0.6250), and the third color coordinate point (0.6000, 0.4000). The first color coordinate point can represent 5700K white compensation light.

[0224] In some examples, the compensation light may be white compensation light. The coordinate point of the compensation light emitted by the compensation light emitting unit 24 in the color coordinates may be located in a first color coordinate region (not shown in the figure), and the first color coordinate region may be composed of three connected color coordinate points. The color coordinate value of the first color coordinate point may be (0.3275, 0.3577), and the color coordinate values ​​of the other two color coordinate points in the first color coordinate region may be (0.2530, 0.2000) and (0.2250, 0.2250), respectively.

[0225] Exemplarily, the coordinate point of the compensation light emitted by the compensation light-emitting unit 24 in the color coordinate can be located in the area enclosed by the first color coordinate point (0.3275, 0.3577), the fourth color coordinate point (0.2800, 0.2500) and the fifth color coordinate point (0.2600, 0.2600).

[0226] According to the principle of light mixing, the closer the color coordinates of the compensation light are to the color coordinates of the light emitted by the light-emitting unit 20 to be compensated, the higher the brightness of the compensation light. By limiting the color coordinates of the compensation light to a reasonable range, the brightness of the white compensation light can also be limited to a reasonable range, avoiding the difficulty of white balance adjustment caused by excessive white compensation light, thereby effectively improving the brightness of the light-emitting substrate 100. Furthermore, limiting the color coordinates of the white compensation light to a reasonable range can reasonably limit the chromaticity range of the monochromatic light emitted by the light-emitting substrate 100, thereby improving the chromatic uniformity of the display light emitted by the light-emitting substrate 100.

[0227] In some examples, as shown in FIG17 , in the chromaticity diagram, the region of the white compensation light color coordinate values ​​can be roughly evenly divided into 10 color blocks, and the color coordinate values ​​of the white compensation light emitted by multiple compensation light-emitting units 24 in a display panel 1000 can be located within a color block. For example, the shape of each color block can be roughly a parallelogram. For example, the four color coordinate points of a color block of the color coordinate values ​​of the first compensation light can be: (0.2805, 0.2515), (0.2805, 0.2615), (0.2855, 0.2705), and (0.2855, 0.2805).

[0228] In this way, the color coordinate region of the white compensation light emitted by the multiple compensation light-emitting units 24 located in a color block is smaller, so that the chromaticity range of the white compensation light emitted by the multiple compensation light-emitting units 24 in the display panel 1000 can be smaller, thereby improving the chromaticity uniformity of the display light emitted by the light-emitting substrate 100.

[0229] For example, the compensation light may be yellow compensation light. The coordinate point of the compensation light emitted by the compensation light emitting unit 24 in the color coordinate may be located within the area enclosed by the first color coordinate point (0.3275, 0.3577), the sixth color coordinate point (0.4500, 0.5500), and the seventh color coordinate point (0.5000, 0.5000).

[0230] By limiting the color coordinates of the yellow compensation light within a reasonable range, the brightness of the yellow compensation light can also be limited within a reasonable range. This can mitigate the low color purity and severe color shift of the light-emitting substrate 100 caused by excessive yellow compensation light intensity. This can effectively improve the brightness of the light-emitting substrate 100 while ensuring the color purity and display quality of the light-emitting substrate 100. Furthermore, limiting the color coordinates of the yellow compensation light within a reasonable range can also effectively limit the chromaticity range of the monochromatic light emitted by the light-emitting substrate 100, thereby improving the chromatic uniformity of the display light emitted by the light-emitting substrate 100.

[0231] For example, the wavelength of the yellow compensation light emitted by the compensation light emitting unit 24 may be greater than or equal to 570 nm and less than or equal to 580 nm. For example, the wavelength of the yellow compensation light emitted by the compensation light emitting unit 24 may be 570 nm, 571 nm, 572 nm, 573 nm, 574 nm, 575 nm, 576 nm, 577 nm, 578 nm, 579 nm, or 580 nm.

[0232] By limiting the wavelength of the yellow compensation light emitted by the compensation light-emitting unit 24 to a reasonable range, the wavelength range of the mixed light of the yellow compensation light and the light emitted by the light-emitting unit 20 can be reduced, thereby making the color purity of the mixed light of the yellow compensation light and the light emitted by the light-emitting unit 20 high, thereby ensuring the color purity and display effect of the light-emitting substrate 100.

[0233] In some examples, the compensation light-emitting unit 24 may include a blue light-emitting unit and a color converter (not shown). The color converter may be located on a side of the blue light-emitting unit away from the base substrate 10, and the blue light emitted by the blue light-emitting unit may be converted into white compensation light or yellow compensation light by the color converter.

[0234] Exemplarily, the material of the color converter may include phosphor or quantum dot (QD) material. For example, the phosphor may include yttrium aluminum garnet (YAG) phosphor. Quantum dots, also known as nanopore quantum dots (NPQD), may include at least one of germanium quantum dot materials, cadmium sulfide quantum dot materials, cadmium selenide quantum dot materials, zinc selenide quantum dot materials, lead sulfide quantum dot materials, lead selenide quantum dot materials, indium phosphide quantum dot materials, and indium arsenide quantum dot materials. In this way, the compensation light emitted by the compensation light-emitting unit 24 has better chromaticity uniformity and higher color purity.

[0235] In some embodiments, the ratio of the light-emitting area of ​​the compensation light-emitting unit 24 to the area of ​​the display area AA of the display panel 1000 may be greater than or equal to 0.1% and less than or equal to 5%. For example, the ratio of the light-emitting area of ​​the compensation light-emitting unit 24 to the area of ​​the display area AA of the display panel 1000 may be 0.1%, 0.3%, 0.5%, 0.8%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, or 5%.

[0236] By reasonably limiting the ratio of the light-emitting area of ​​the compensation light-emitting unit 24 to the area of ​​the display area AA of the display panel 1000, the amount of light emitted by the compensation light-emitting unit 24 can be limited to a reasonable range, thereby reasonably improving the light-emitting brightness of the light-emitting substrate 100 and the chromatic uniformity of the display light emitted by the light-emitting substrate 100 while ensuring the display effect of the light-emitting substrate 100.

[0237] In summary, in the light-emitting substrate 100 and display panel 1000 provided by the embodiments of the present disclosure, since the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the light emitted by the light-emitting unit 20, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. Furthermore, since the use of the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous solution in which the compensation light-emitting unit 24 is not used in the light-emitting substrate 100, the distance between the coordinate points of the light emitted by any two light-emitting units 20 of the same color in the same light-emitting substrate 100 is larger in the color coordinates. This allows the same light-emitting substrate 100 to accept a wider chromaticity range of light emitted by multiple light-emitting units 20 of the same color. Therefore, the number of chromaticity levels of the light-emitting units 20 can be reduced during the screening and binning stages, thereby improving the utilization rate of the light-emitting units 20. In this way, the difficulty of screening the light-emitting units 20 or the steps of screening the light-emitting units 20 can be reduced, thereby improving the manufacturing efficiency of the light-emitting substrate 100 .

[0238] 19 and 20 are flow charts of methods for preparing a light-emitting substrate according to some embodiments.

[0239] Some embodiments of the present disclosure provide a method for preparing a light-emitting substrate 100. The method for preparing the light-emitting substrate 100 can produce the light-emitting substrate 100 of any of the above embodiments. As shown in FIG19 , the method for preparing the light-emitting substrate 100 can include steps S100 and S200.

[0240] Step S100: forming a base substrate 10. The base substrate 10 includes a plurality of pixel unit areas.

[0241] As shown in Figures 3 and 4, the base substrate 10 may include a plurality of pixel unit areas PU arranged in a repeated pattern. Each pixel unit area PU may include a plurality of sub-pixel areas and a non-luminous area FA located around each sub-pixel area. For example, each pixel unit area PU may include a first sub-pixel area P1, a second sub-pixel area P2, a third sub-pixel area P3, and at least one fourth sub-pixel area P4. The number of fourth sub-pixel areas P4 may be one or more.

[0242] The specific structural features of the pixel unit area PU have been described in detail above and will not be repeated here.

[0243] In some examples, the base substrate 10 may be a flexible base substrate 10. For example, the material of the flexible base substrate 10 may include an organic material. For example, the material of the flexible base substrate 10 may include any one of polyimide (PI), polycarbonate (PC), or polyvinyl chloride (PVC).

[0244] In some other examples, the base substrate 10 may be a rigid base substrate 10. For example, the material of the rigid base substrate 10 may include glass or polymethyl methacrylate (PMMA).

[0245] In some embodiments, step S100 may further include: forming a plurality of pixel circuits S on one side of the base substrate 10 .

[0246] For example, a pixel unit area PU may include a first pixel circuit S1, a second pixel circuit S2, and a third pixel circuit S3. For example, the first pixel circuit S1 is located in the first sub-pixel area P1, the second pixel circuit S2 is located in the second sub-pixel area P2, and the third pixel circuit S3 is located in the third sub-pixel area P3. For another example, the thin film transistor of at least one of the first pixel circuit S1, the second pixel circuit S2, and the third pixel circuit S3 may be located in the non-emission area FA.

[0247] The structural features of the plurality of pixel circuits S have been described in detail above and will not be repeated here.

[0248] In some examples, step S100 may further include forming an insulating layer 30 on a side of the plurality of pixel circuits S away from the base substrate 10. The insulating layer 30 may be located on the pixel circuits S. The insulating layer 30 may have a planarized surface. The insulating layer 30 may be formed from an organic layer. For example, the insulating layer 30 may include an acrylic resin, an epoxy resin, an imide resin, or an ester resin. The insulating layer 30 may have through holes that may expose the pixel circuits S to facilitate electrical connection between the pixel circuits S and the electrodes of the light-emitting unit 20.

[0249] Step S200 : forming a plurality of light emitting units 20 on one side of the base substrate 10 . The plurality of light emitting units 20 include a first light emitting unit 21 , a second light emitting unit 22 , a third light emitting unit 23 and at least one compensation light emitting unit 24 located in one pixel unit area.

[0250] In some embodiments, the distance between the coordinate point of the first color light emitted by one first light-emitting unit 21 in the color coordinate and the coordinate point of the first color light emitted by another first light-emitting unit 21 in the color coordinate is greater than or equal to 0.035 (for example, 0.035, 0.038, 0.04, 0.042, 0.045, 0.05, 0.052, 0.055, 0.058, 0.06 or 0.065).

[0251] Because the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the first color light, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. In the disclosed embodiment, while the use of the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous solution in which the compensation light-emitting unit 24 is not used in the light-emitting substrate 100, the distance between the coordinate points of the first color light emitted by any two first light-emitting units 21 in the same light-emitting substrate 100 is larger in the color coordinates. This increases the chromaticity range of the first color light emitted by multiple first light-emitting units 21 that can be accepted by the same light-emitting substrate 100. This reduces the number of chromaticity-based binning of the first light-emitting units 21 during the screening and binning stages, thereby improving the utilization rate of the first light-emitting units 21. This also reduces the difficulty or number of steps required to screen the first light-emitting units 21, thereby improving the manufacturing efficiency of the light-emitting substrate 100.

[0252] In some embodiments, the distance between the coordinate point of the second color light emitted by one second light-emitting unit 22 in the color coordinate and the coordinate point of the second color light emitted by another second light-emitting unit 22 in the color coordinate is greater than or equal to 0.023 (for example, 0.023, 0.025, 0.026, 0.028, 0.029, 0.03, 0.032 or 0.035).

[0253] Because the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the second color light, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. In the disclosed embodiment, while the use of the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous embodiment of the light-emitting substrate 100 without the compensation light-emitting unit 24, the distance between the coordinate points of the second color light emitted by any two second light-emitting units 22 in the same light-emitting substrate 100 is larger. This increases the chromaticity range of the second color light emitted by multiple second light-emitting units 22 that can be accepted by the same light-emitting substrate 100. This reduces the number of chromaticity-based binning of the second light-emitting units 22 during the screening and binning stages, thereby improving the utilization rate of the second light-emitting units 22. This also reduces the difficulty or steps required to screen the second light-emitting units 22, thereby improving the manufacturing efficiency of the light-emitting substrate 100.

[0254] In some embodiments, the distance between the coordinate point of the third color light emitted by one third light-emitting unit 23 in the color coordinate and the coordinate point of the third color light emitted by another third light-emitting unit 23 in the color coordinate is greater than or equal to 0.005 (for example, 0.005, 0.006, 0.007, 0.008, 0.009, 0.010, 0.012 or 0.015).

[0255] Because the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the third color light, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. In the disclosed embodiment, while the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous solution in which the compensation light-emitting unit 24 is not used in the light-emitting substrate 100, the distance between the coordinate points of the third color light emitted by any two third light-emitting units 23 in the same light-emitting substrate 100 is larger. This increases the chromaticity range of the third color light emitted by multiple third light-emitting units 23 that can be accepted by the same light-emitting substrate 100. This reduces the number of chromaticity-based binning of the third light-emitting units 23 during the screening and binning stages, thereby improving the utilization rate of the third light-emitting units 23. This also reduces the difficulty or steps in screening the third light-emitting units 23, thereby improving the manufacturing efficiency of the light-emitting substrate 100.

[0256] In some embodiments, as shown in FIG. 20 , step S200 may include steps S201 to S202 .

[0257] Step S201 : forming a plurality of first light emitting units 21 , a plurality of second light emitting units 22 , a plurality of third light emitting units 23 and a plurality of compensation light emitting units 24 on different sapphire substrates respectively.

[0258] Step S202 : directly transferring the plurality of first light emitting units 21 , the plurality of second light emitting units 22 , the plurality of third light emitting units 23 and the plurality of compensation light emitting units 24 to one side of the base substrate to form a plurality of light emitting units.

[0259] Since the light-emitting substrate 100 of the embodiment of the present disclosure can accept a wide range of chromaticities of the light emitted by the light-emitting units 20, the number of grades of the light-emitting units 20 divided according to chromaticity can be reduced in the screening and grading stages. Therefore, the screening step of the light-emitting units 20 can be omitted, and the light-emitting units 20 can be directly transferred in large quantities, which can simplify the manufacturing process of the light-emitting substrate 100, thereby improving the utilization rate of the light-emitting units 20 and the manufacturing efficiency of the light-emitting substrate 100.

[0260] In some examples, step S202 may include: forming a plurality of interconnected first light-emitting units 21 on one side of a sapphire substrate by epitaxial growth, and then forming a plurality of independent first light-emitting units 21 by laser cutting.

[0261] Step S202 may include: directly transferring a plurality of mutually independent first light emitting units 21 to a side of the insulating layer 30 away from the base substrate 10 .

[0262] Step S200 may further include forming a plurality of second light-emitting units 22, a plurality of third light-emitting units 23, or a plurality of compensation light-emitting units 24. The method for forming each light-emitting unit can refer to the method for forming the plurality of first light-emitting units 21 described above and is not further described here. The plurality of first light-emitting units 21, the plurality of second light-emitting units 22, the plurality of third light-emitting units 23, and the plurality of compensation light-emitting units 24 form a plurality of light-emitting units 20.

[0263] The specific structural features of the light emitting unit 20 have been described in detail above and will not be repeated here.

[0264] In summary, in the light-emitting substrate 100 prepared by the method for preparing the light-emitting substrate 100 provided by the embodiment of the present disclosure, the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the light emitted by the light-emitting unit 20, thereby reducing the chromaticity range of the display light emitted by the light-emitting substrate 100. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the luminous uniformity requirements of the light-emitting substrate 100. Furthermore, while the use of the compensation light-emitting unit 24 can meet the luminous uniformity requirements of the light-emitting substrate 100, compared to the previous solution in which the compensation light-emitting unit 24 is not used in the light-emitting substrate 100, the distance between the coordinate points of the light emitted by any two light-emitting units 20 of the same color in the same light-emitting substrate 100 is larger in the color coordinates. This allows the same light-emitting substrate 100 to accept a wider chromaticity range of the light emitted by multiple light-emitting units 20 of the same color. Therefore, the number of bins for the light-emitting units 20 classified by chromaticity can be reduced during the screening and binning stages, thereby improving the utilization rate of the light-emitting units 20. In this way, the difficulty of screening the light-emitting units 20 or the steps of screening the light-emitting units 20 can be reduced, thereby improving the manufacturing efficiency of the light-emitting substrate 100 .

[0265] Some embodiments of the present disclosure further provide a method for driving the light-emitting substrate 100. The method for driving the light-emitting substrate 100 may include adjusting the brightness of at least one of the first light-emitting unit 21, the second light-emitting unit 22, the third light-emitting unit 23, and the compensation light-emitting unit 24 by adjusting the driving current or the duty cycle of the driving voltage.

[0266] In some examples, when an actively driven light-emitting unit 20 is used, the driving method of the light-emitting substrate 100 may include: adjusting the brightness of the first light-emitting unit 21 by adjusting the driving current on the first electrode AE ​​or the driving current on the second electrode CE of the first light-emitting unit 21; and / or adjusting the brightness of the compensation light emitted by the compensation light-emitting unit 24 corresponding to the first light-emitting unit 21 by adjusting the driving current on the first electrode AE ​​or the driving current on the second electrode CE of the compensation light-emitting unit 24 corresponding to the first light-emitting unit 21.

[0267] In other examples, when a passively driven light-emitting unit 20 is used, the driving method of the light-emitting substrate 100 may include: adjusting the brightness of the first light-emitting unit 21 by adjusting the duty cycle of the driving voltage on the first electrode AE ​​or the duty cycle of the driving voltage on the second electrode CE of the first light-emitting unit 21; and / or adjusting the brightness of the compensation light emitted by the compensation light-emitting unit 24 corresponding to the first light-emitting unit 21 by adjusting the duty cycle of the driving voltage on the first electrode AE ​​or the duty cycle of the driving voltage on the second electrode CE of the compensation light-emitting unit 24 corresponding to the first light-emitting unit 21.

[0268] The brightness adjustment methods of the second light emitting unit 22 and the third light emitting unit 23 and the corresponding compensation light emitting unit 24 can refer to the brightness adjustment method of the first light emitting unit 21 and the corresponding compensation light emitting unit 24, and are not described here.

[0269] In this way, the ratio between the brightness of the compensation light emitted by the compensation light-emitting unit 24 and the brightness of the light emitted by the corresponding light-emitting unit 20 can be adjusted, thereby improving the brightness of the display light emitted by the display panel 1000. While improving the brightness of the display light emitted by the display panel 1000, the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the light emitted by the light-emitting unit 20, reducing the chromaticity range of the display light emitted by the light-emitting substrate 100. This can improve the brightness and chromaticity uniformity of the light-emitting substrate 100. This ensures the display quality of the display panel 1000 and a wide color gamut coverage area of ​​the display light emitted by the display panel 1000.

[0270] In some embodiments, the distance between the coordinate point of the first color light emitted by one first light-emitting unit 21 in the color coordinate and the coordinate point of the first color light emitted by another first light-emitting unit 21 in the color coordinate is greater than or equal to 0.035 (for example, 0.035, 0.038, 0.04, 0.042, 0.045, 0.05, 0.052, 0.055, 0.058, 0.06 or 0.065).

[0271] Because the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the first color light, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. In the disclosed embodiment, while the use of the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous solution in which the compensation light-emitting unit 24 is not used in the light-emitting substrate 100, the distance between the coordinate points of the first color light emitted by any two first light-emitting units 21 in the same light-emitting substrate 100 is larger in the color coordinates. This increases the chromaticity range of the first color light emitted by multiple first light-emitting units 21 that can be accepted by the same light-emitting substrate 100. This reduces the number of chromaticity-based binning of the first light-emitting units 21 during the screening and binning stages, thereby improving the utilization rate of the first light-emitting units 21. This also reduces the difficulty or number of steps required to screen the first light-emitting units 21, thereby improving the manufacturing efficiency of the light-emitting substrate 100.

[0272] In some embodiments, the distance between the coordinate point of the second color light emitted by one second light-emitting unit 22 in the color coordinate and the coordinate point of the second color light emitted by another second light-emitting unit 22 in the color coordinate is greater than or equal to 0.023 (for example, 0.023, 0.025, 0.026, 0.028, 0.029, 0.03, 0.032 or 0.035).

[0273] Because the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the second color light, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. In the disclosed embodiment, while the use of the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous embodiment of the light-emitting substrate 100 without the compensation light-emitting unit 24, the distance between the coordinate points of the second color light emitted by any two second light-emitting units 22 in the same light-emitting substrate 100 is larger. This increases the chromaticity range of the second color light emitted by multiple second light-emitting units 22 that can be accepted by the same light-emitting substrate 100. This reduces the number of chromaticity-based binning of the second light-emitting units 22 during the screening and binning stages, thereby improving the utilization rate of the second light-emitting units 22. This also reduces the difficulty or steps required to screen the second light-emitting units 22, thereby improving the manufacturing efficiency of the light-emitting substrate 100.

[0274] In some embodiments, the distance between the coordinate point of the third color light emitted by one third light-emitting unit 23 in the color coordinate and the coordinate point of the third color light emitted by another third light-emitting unit 23 in the color coordinate is greater than or equal to 0.005 (for example, 0.005, 0.006, 0.007, 0.008, 0.009, 0.010, 0.012 or 0.015).

[0275] Because the compensation light emitted by the compensation light-emitting unit 24 can be mixed with the third color light, the chromaticity range of the display light emitted by the light-emitting substrate 100 is reduced. This improves the brightness and chromaticity uniformity of the light-emitting substrate 100, thereby meeting the emission uniformity requirements of the light-emitting substrate 100. In the disclosed embodiment, while the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100, compared to the previous solution in which the compensation light-emitting unit 24 is not used in the light-emitting substrate 100, the distance between the coordinate points of the third color light emitted by any two third light-emitting units 23 in the same light-emitting substrate 100 is larger. This increases the chromaticity range of the third color light emitted by multiple third light-emitting units 23 that can be accepted by the same light-emitting substrate 100. This reduces the number of chromaticity-based binning of the third light-emitting units 23 during the screening and binning stages, thereby improving the utilization rate of the third light-emitting units 23. This also reduces the difficulty or steps in screening the third light-emitting units 23, thereby improving the manufacturing efficiency of the light-emitting substrate 100.

[0276] In summary, in the driving method of the light-emitting substrate 100 provided in the embodiment of the present disclosure, by adjusting the driving current of the light-emitting unit 20 or adjusting the duty cycle of the driving voltage, the ratio between the brightness of the light emitted by the light-emitting unit 20 and the brightness of the compensation light emitted by the corresponding compensation light-emitting unit 24 can be adjusted, thereby improving the brightness of the display light emitted by the display panel 1000, ensuring the display effect of the display panel 1000, and ensuring that the color gamut coverage of the display light emitted by the display panel 1000 is large. In addition, the use of the compensation light-emitting unit 24 can meet the emission uniformity requirements of the light-emitting substrate 100. Compared with the previous solution of the light-emitting substrate 100 without the compensation light-emitting unit 24, the distance between the coordinate points of the light emitted by any two light-emitting units 20 of the same color in the same light-emitting substrate 100 is larger, which can increase the chromaticity range of the light emitted by multiple light-emitting units 20 of the same color that can be accepted by the same light-emitting substrate 100. Therefore, the number of chromaticity-based bins of the light-emitting units 20 can be reduced during the screening and binning stages, thereby improving the utilization rate of the light-emitting units 20. In this way, the difficulty of screening the light-emitting units 20 or the steps of screening the light-emitting units 20 can be reduced, thereby improving the manufacturing efficiency of the light-emitting substrate 100 .

[0277] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A light-emitting substrate, comprising: A substrate base, comprising a plurality of pixel unit areas; A plurality of light emitting units, located on one side of the substrate, including a first light emitting unit, a second light emitting unit, a third light emitting unit and at least one compensation light emitting unit located in each pixel unit area; A distance between a coordinate point of the first color light emitted by one of the first light-emitting units in the color coordinates and a coordinate point of the first color light emitted by another of the first light-emitting units in the color coordinates is greater than or equal to 0.035; and / or, A distance between a coordinate point of the second color light emitted by one of the second light-emitting units in the color coordinates and a coordinate point of the second color light emitted by another of the second light-emitting units in the color coordinates is greater than or equal to 0.023; and / or, A distance between a coordinate point of the third color light emitted by one of the third light emitting units in the color coordinates and a coordinate point of the third color light emitted by another of the third light emitting units in the color coordinates is greater than or equal to 0.

005.

2. The light-emitting substrate according to claim 1, wherein: A distance between a coordinate point of the first color light emitted by one of the first light-emitting units in the color coordinates and a coordinate point of the first color light emitted by another of the first light-emitting units in the color coordinates is greater than or equal to 0.042; and / or, A distance between a coordinate point of the second color light emitted by one of the second light-emitting units in the color coordinates and a coordinate point of the second color light emitted by another of the second light-emitting units in the color coordinates is greater than or equal to 0.026; and / or, A distance between a coordinate point of the third color light emitted by one of the third light emitting units in the color coordinates and a coordinate point of the third color light emitted by another of the third light emitting units in the color coordinates is greater than or equal to 0.

007.

3. The light-emitting substrate according to claim 1 or 2, wherein: The area of ​​the first MacAdam ellipse region corresponding to the third color light emitted by the third light emitting unit is smaller than the area of ​​the second MacAdam ellipse region corresponding to the mixed light of the third color light emitted by the third light emitting unit and the compensation light emitted by the compensation light emitting unit.

4. The light-emitting substrate according to claim 3, wherein: The range value of the first MacAdam ellipse area on the first coordinate axis in the color coordinate is smaller than the range value of the second MacAdam ellipse area on the first coordinate axis; and / or, The range value of the first MacAdam ellipse area on the second coordinate axis in the color coordinate is smaller than the range value of the second MacAdam ellipse area on the second coordinate axis.

5. The light-emitting substrate according to claim 3 or 4, wherein: The ratio between the range value of the third color light on the first coordinate axis in the color coordinates and the range value of the first MacAdam ellipse area on the first coordinate axis is M1; The ratio of the range value of the mixed light of the third color light and the compensation light on the first coordinate axis in the color coordinates to the range value of the second MacAdam ellipse area on the first coordinate axis is N1; The M1 is greater than the N1; and / or, The ratio between the range value of the third color light on the second coordinate axis in the color coordinates and the range value of the first MacAdam ellipse area on the second coordinate axis is M2; The extreme difference between the mixed light of the third color light and the compensation light on the second coordinate axis in the color coordinates and the extreme difference between the second MacAdam ellipse area on the second coordinate axis The ratio between the differences is N2; the M2 is greater than the N2.

6. The light emitting substrate according to any one of claims 1 to 5, wherein A pixel unit area includes a first light emitting unit, a second light emitting unit, a third light emitting unit and a compensation light emitting unit; The attenuation rate of the luminous brightness of the first light-emitting unit corresponding to the single lighting duration is greater than the attenuation rate of the luminous brightness of the second light-emitting unit corresponding to the single lighting duration, and the attenuation rate of the luminous brightness of the first light-emitting unit corresponding to the single lighting duration is greater than the attenuation rate of the luminous brightness of the third light-emitting unit corresponding to the single lighting duration; The compensation light-emitting unit is located around the first light-emitting unit.

7. The light-emitting substrate according to any one of claims 1 to 5, wherein A pixel unit area includes a first light emitting unit, a second light emitting unit, a third light emitting unit and two compensation light emitting units; The light emitting brightness of the first light emitting unit is lower than the light emitting brightness of the second light emitting unit, and the light emitting brightness of the second light emitting unit is higher than the light emitting brightness of the third light emitting unit; One compensation light-emitting unit is located around the first light-emitting unit, and another compensation light-emitting unit is located around the third light-emitting unit.

8. The light emitting substrate according to any one of claims 1 to 5, wherein A pixel unit area includes a first light emitting unit, a second light emitting unit, a third light emitting unit and three compensation light emitting units; The three compensation light-emitting units include a first compensation light-emitting unit, a second compensation light-emitting unit and a third compensation light-emitting unit; Along a direction parallel to the base substrate, the first compensation light emitting unit is located around the first light emitting unit, the second compensation light emitting unit is located around the second light emitting unit, and the third compensation light emitting unit is located around the third light emitting unit.

9. The light emitting substrate according to claim 8, wherein: The ratio of the luminous brightness of the first compensating luminous unit to the luminous brightness of the first luminous unit, the ratio of the luminous brightness of the second compensating luminous unit to the luminous brightness of the second luminous unit, and the ratio of the luminous brightness of the third compensating luminous unit to the luminous brightness of the third luminous unit are different from each other.

10. The light-emitting substrate according to claim 8 or 9, wherein: The attenuation rate of the luminous brightness of the first light-emitting unit corresponding to a single lighting duration is greater than the attenuation rate of the luminous brightness of the second light-emitting unit corresponding to a single lighting duration; the difference between the ratio of the luminous brightness of the first compensating light-emitting unit to the luminous brightness of the first light-emitting unit at the first moment and the ratio of the luminous brightness of the first compensating light-emitting unit to the luminous brightness of the first light-emitting unit at the second moment is a first proportional difference; the difference between the ratio of the luminous brightness of the second compensating light-emitting unit to the luminous brightness of the second light-emitting unit at the first moment and the ratio of the luminous brightness of the second compensating light-emitting unit to the luminous brightness of the second light-emitting unit at the second moment is a second proportional difference; the first proportional difference is greater than the second proportional difference; and / or, The attenuation rate of the luminous brightness of the second luminous unit corresponding to the single lighting duration is greater than that of the third luminous unit. The attenuation rate of the luminous brightness corresponding to the single lighting duration; the difference between the ratio of the luminous brightness of the second compensating luminous unit to the luminous brightness of the second luminous unit at the first moment and the ratio of the luminous brightness of the second compensating luminous unit to the luminous brightness of the second luminous unit at the second moment is a third proportional difference; the difference between the ratio of the luminous brightness of the third compensating luminous unit to the luminous brightness of the third luminous unit at the first moment and the ratio of the luminous brightness of the third compensating luminous unit to the luminous brightness of the third luminous unit at the second moment is a fourth proportional difference; the third proportional difference is greater than the fourth proportional difference; The first moment is a moment between the lighting moment and the second moment.

11. The light emitting substrate according to any one of claims 1 to 10, wherein The ratio of the luminance of the compensating luminous unit to the luminance of the first luminous unit in different pixel unit areas is substantially the same; and / or, The ratio of the luminance of the compensating luminous unit to the luminance of the second luminous unit in different pixel unit areas is substantially the same; and / or, The ratio of the luminance of the compensating luminous unit to the luminance of the third luminous unit in different pixel unit areas is substantially the same.

12. The light emitting substrate according to any one of claims 1 to 11, wherein The ratio of the luminance of the compensating luminous unit to the luminance of the first luminous unit is greater than or equal to 10% and less than or equal to 50%; and / or, The ratio of the luminance of the compensating luminous unit to the luminance of the second luminous unit is greater than or equal to 10% and less than or equal to 50%; and / or, The ratio of the luminance of the compensation luminous unit to the luminance of the third luminous unit is greater than or equal to 10% and less than or equal to 50%.

13. The light emitting substrate according to any one of claims 1 to 12, wherein The light emitting area of ​​the compensation light emitting unit is substantially the same as the light emitting area of ​​the first light emitting unit; and / or, The light emitting area of ​​the compensation light emitting unit is substantially the same as the light emitting area of ​​the second light emitting unit; and / or, The light emitting area of ​​the compensation light emitting unit is substantially the same as the light emitting area of ​​the third light emitting unit.

14. The light emitting substrate according to any one of claims 1 to 13, wherein The coordinate point of the compensation light emitted by the compensation light emitting unit in the color coordinate is located in the area surrounded by the first color coordinate point (0.3275, 0.3577), the second color coordinate point (0.3750, 0.6250) and the third color coordinate point (0.6000, 0.4000).

15. The light emitting substrate according to any one of claims 1 to 13, wherein The coordinate point of the compensation light emitted by the compensation light emitting unit in the color coordinate is located in the area surrounded by the first color coordinate point (0.3275, 0.3577), the fourth color coordinate point (0.2800, 0.2500) and the fifth color coordinate point (0.2600, 0.2600); and / or, The coordinate point of the compensation light emitted by the compensation light emitting unit in the color coordinate is located in the area surrounded by the first color coordinate point (0.3275, 0.3577), the sixth color coordinate point (0.4500, 0.5500) and the seventh color coordinate point (0.5000, 0.5000).

16. A method for preparing a light-emitting substrate, comprising: forming a substrate base; The substrate includes a plurality of pixel unit areas; A plurality of light emitting units are formed on one side of the base substrate; The multiple light-emitting units include a first light-emitting unit, a second light-emitting unit, a third light-emitting unit and at least one compensation light-emitting unit located in each pixel unit area; the distance between the coordinate point of the first color light emitted by one of the first light-emitting units in the color coordinates and the coordinate point of the first color light emitted by another of the first light-emitting units in the color coordinates is greater than 0.035; and / or, the distance between the coordinate point of the second color light emitted by one of the second light-emitting units in the color coordinates and the coordinate point of the second color light emitted by another of the second light-emitting units in the color coordinates is greater than 0.023; and / or, the distance between the coordinate point of the third color light emitted by one of the third light-emitting units in the color coordinates and the coordinate point of the third color light emitted by another of the third light-emitting units in the color coordinates is greater than 0.

005.

17. The method for preparing a light-emitting substrate according to claim 16, wherein: A plurality of light emitting units are formed on one side of the substrate, including: Forming a plurality of first light emitting units, a plurality of second light emitting units, a plurality of third light emitting units and a plurality of compensation light emitting units on different sapphire substrates respectively; The plurality of first light emitting units, the plurality of second light emitting units, the plurality of third light emitting units and the plurality of compensation light emitting units are respectively directly transferred to one side of the base substrate to form a plurality of light emitting units.

18. A driving method of a light-emitting substrate, the light-emitting substrate comprising a first light-emitting unit, a second light-emitting unit, a third light-emitting unit and a compensation light-emitting unit located in each pixel unit area; the driving method comprising: The brightness of at least one of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the compensation light-emitting unit is adjusted respectively by adjusting the driving current or adjusting the duty cycle of the driving voltage; the distance between the coordinate point of the first color light emitted by one of the first light-emitting units in the color coordinates and the coordinate point of the first color light emitted by another of the first light-emitting units in the color coordinates is greater than 0.035; and / or, the distance between the coordinate point of the second color light emitted by one of the second light-emitting units in the color coordinates and the coordinate point of the second color light emitted by another of the second light-emitting units in the color coordinates is greater than 0.023; and / or, the distance between the coordinate point of the third color light emitted by one of the third light-emitting units in the color coordinates and the coordinate point of the third color light emitted by another of the third light-emitting units in the color coordinates is greater than 0.

005.

19. A display panel, comprising: The light-emitting substrate according to any one of claims 1 to 15.

20. The display panel according to claim 19, comprising a display area, wherein: The ratio of the light emitting area of ​​the compensation light emitting unit to the area of ​​the display area is greater than or equal to 0.1% and less than or equal to 5%.

Images