Display panel, preparation method thereof and electronic equipment

Abstract

The invention discloses a display panel, a preparation method thereof and electronic equipment, and the display panel comprises a display layer which comprises a plurality of first light-emitting units arranged in an array; the first light-emitting unit comprises at least one first light-emitting element, and the first light-emitting element emits first color light; the dominant wavelength of the first light-emitting elements in the same first light-emitting unit meets a first preset condition; in the two adjacent first light-emitting units in the first direction, the dominant wavelengths of the first light-emitting elements have a first difference value D1; the first direction comprises at least one of the row direction and the column direction of the array where the first light-emitting units are located; in the two adjacent first light-emitting units in the second direction, the dominant wavelengths of the first light-emitting elements have a second difference value D2; an included angle larger than 0 degree and smaller than 90 degrees is formed between the second direction and the first direction; and D1-D2 > 0. According to the display panel, the display effects of the first light-emitting elements with different dominant wavelengths in the display panel can be complemented, and the display uniformity is improved.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and particularly to a display panel, a manufacturing method thereof, and an electronic device. Background Art

[0002] With the continuous development of science and technology, more and more electronic devices with display functions are widely used in people's daily lives and work, bringing great convenience to people's daily lives and work, and becoming an indispensable important tool for people today. The main component for an electronic device to achieve a display function is a display panel.

[0003] An active display panel is a display panel that displays images through the self-luminescence of light-emitting elements. Compared with a passive display panel that requires backlighting for image display, the active display panel has better performance in multiple aspects such as contrast, color presentation, and viewing angle range.

[0004] For an active display panel that requires a transfer process to form a light-emitting element array, due to the display differences between light-emitting elements of the same light-emitting color, the display panel has a problem of uneven display. Summary of the Invention

[0005] In view of the above problems, the present application provides a display panel, a manufacturing method thereof, and an electronic device, which can solve the problem of uneven display of the display panel caused by the display differences of light-emitting elements of the same color. The specific solutions are as follows:

[0006] The first aspect of the present application provides a display panel, including:

[0007] A display layer, the display layer includes a plurality of first light-emitting units arranged in an array; the first light-emitting unit includes at least one first light-emitting element, and the first light-emitting element emits first-color light; the peak wavelengths of the first light-emitting elements in the same first light-emitting unit satisfy a first preset condition;

[0008] In two adjacent first light-emitting units in a first direction, the peak wavelengths of the first light-emitting elements have a first difference D 1 ; the first direction includes at least one of the row direction and the column direction of the array where the first light-emitting units are located;

[0009] In two adjacent first light-emitting units in a second direction, the peak wavelengths of the first light-emitting elements have a second difference D 2 ; the second direction has an angle greater than 0° and less than 90° with the first direction;

[0010] Wherein, |D 1 -D 2 | > 0.

[0011] Based on the above description, in the display panel provided by the technical solution of the present application, since |D 1 -D 2 | > 0, that is, D 1 ≠D 2 , it is possible to make the main wavelength differences corresponding to two adjacent first light-emitting units in the first direction and two adjacent first light-emitting units in the second direction different. Through the main wavelength differential design corresponding to the first direction and the second direction, the display effects of the first light-emitting elements with different main wavelengths in the display panel are complementary. Based on the adapted D 1 and D 2 , it is possible to effectively solve the problem of uneven display of the display panel caused by the display differences of the light-emitting elements of the same color.

[0012] The second aspect of the present application provides an electronic device, including the above display panel.

[0013] Based on the above description, since the electronic device includes the above display panel, it is possible to solve the problem of uneven display of the display panel caused by the display differences of the light-emitting elements of the same color and improve the image display quality.

[0014] The third aspect of the present application provides a method for manufacturing the above display panel, including:

[0015] Manufacture a first device wafer, the first device wafer including a plurality of first light-emitting elements that emit light of a first color;

[0016] Test the first device wafer to obtain the wavelength distribution of the first light-emitting elements in the first device wafer; the first device wafer includes a plurality of test areas, and the test area includes at least one first light-emitting element; determine the wavelength distribution based on the main wavelength of the test area;

[0017] Determine a wafer complementary group, the wafer complementary group including c first device wafers with complementary wavelength distributions;

[0018] Weld and fix a plurality of first light-emitting elements arranged in an array on the array substrate, and the first light-emitting elements welded and fixed on the array substrate come from the same wafer complementary group;

[0019] Wherein,

[0020] The array substrate has a plurality of first light-emitting units arranged in an array; the first light-emitting unit includes at least one first light-emitting element; the main wavelengths of the first light-emitting elements in the same first light-emitting unit satisfy a first preset condition;

[0021] In two adjacent first light-emitting units in the first direction, the main wavelengths of the first light-emitting elements have a first difference D 1 ; the first direction includes at least one of the row direction and the column direction of the array where the first light-emitting unit is located;

[0022] Among the first light-emitting units adjacent in the second direction, the peak wavelengths of the first light-emitting elements have a second difference D 2 ; the second direction forms an angle greater than 0° and less than 90° with the first direction;

[0023] wherein, |D 1 - D 2 | > 0.

[0024] Based on the above description, it can be known that the manufacturing method provided by the technical solution of the present application can be used to manufacture the above display panel. By forming a first light-emitting element array on the array substrate based on the first light-emitting elements in the wafer complementary group, it is possible to make the two first light-emitting units adjacent in the first direction and the two first light-emitting units adjacent in the second direction correspond to different peak wavelength differences. Through the peak wavelength differential design corresponding to the first direction and the second direction, the display effects of the first light-emitting elements with different peak wavelengths in the display panel are complementary. Based on the adapted D 1 and D 2 , it is possible to effectively solve the problem of uneven display of the display panel caused by the display differences of light-emitting elements of the same color. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0026] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present application can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present application.

[0027] Figure 1 It is a display effect diagram when a conventional display panel displays a monochromatic picture;

[0028] Figure 2 It is a schematic diagram of the layout of the first light-emitting elements in a display panel provided by an embodiment of the present application;

[0029] Figure 3 It is a schematic diagram of another layout of the first light-emitting elements in a display panel provided by an embodiment of the present application;

[0030] Figure 4 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0031] Figure 5 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0032] Figure 6 Display effect diagram when the display panel provided by the embodiment of the present application displays a monochromatic picture;

[0033] Figure 7 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0034] Figure 8 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0035] Figure 9 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0036] Figure 10 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0037] Figure 11 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0038] Figure 12 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0039] Figure 13 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0040] Figure 14 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0041] Figure 15 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0042] Figure 16 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0043] Figure 17 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0044] Figure 18 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0045] Figure 19 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0046] Figure 20 Cross-sectional view of a display panel provided by the embodiment of the present application;

[0047] Figure 21 Schematic diagram of the structure of an electronic device provided by the embodiment of the present application;

[0048] Figure 22 Schematic diagram of the process of a method for manufacturing a display panel provided by the embodiment of the present application;

[0049] Figure 23 Schematic diagram of the process of a method for testing a first device wafer provided by the embodiment of the present application;

[0050] Figure 24 Schematic diagram of the main wavelength distribution of a first device wafer provided by the embodiment of the present application;

[0051] Figure 25 Schematic diagram of the main wavelength distribution of another first device wafer provided by the embodiment of the present application;

[0052] Figure 26 Schematic diagram of the main wavelength distribution of yet another first device wafer provided by the embodiment of the present application;

[0053] Figure 27 Schematic diagram of the main wavelength distribution of yet another first device wafer provided by the embodiment of the present application;

[0054] Figure 28 Schematic diagram of the process of a method for determining a wafer complementary group provided by the embodiment of the present application;

[0055] Figure 29 Schematic diagram of the calculation principle for determining a wafer complementary group provided by the embodiment of the present application;

[0056] Figure 30 Schematic diagram of the calculation principle for determining a wafer complementary group provided by the embodiment of the present application;

[0057] Figure 31 Schematic diagram of another layout of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0058] Figure 32Schematic diagram of another layout method of the first light-emitting element in the display panel provided by the embodiment of the present application;

[0059] Figures 33 - 38 Schematic diagram of the transfer principle of a first light-emitting element provided by the embodiment of the present application;

[0060] Figure 39 Schematic diagram of the calculation principle of the main wavelength of a light-emitting element provided by the embodiment of the present application. Detailed implementation manners

[0061] Next, the embodiments in the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Those of ordinary skill in the art can know that with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0062] For an active display panel that requires a transfer process to form a light-emitting element array, the display panel uses a micro LED as the light-emitting element. Among them, the micro LED can be a MINI LED or a Micro LED. The display panel using a micro LED as the light-emitting element has technical advantages such as high brightness, high contrast, wide color gamut, fast response, and long life, and is one of the most important display technologies after LCD and OLED.

[0063] The micro LED needs to be batch-prepared on a wafer. Through semiconductor processes, a large number of micro LEDs with the same light-emitting color can be formed based on the same wafer, and then the micro LEDs are transferred to the array substrate of the display panel through a transfer process to form a light-emitting element array. When preparing the micro LED on the wafer, generally, each film layer structure of the micro LED needs to be formed through a deposition process. Due to the differences in the film layer components and thicknesses of the micro LEDs in different regions of the wafer during the preparation process, the main wavelengths of the micro LEDs in different regions of the wafer are different.

[0064] Refer to Figure 1 Figure 1 As a display effect diagram when a conventional display panel displays a monochromatic picture. Through the above description, it can be known that due to the differences in the main wavelengths of the micro LEDs in different regions of the wafer, when using the micro LED as the light-emitting element of the display panel, for the light-emitting elements of the same light-emitting color in the display panel, there are multiple different main wavelengths, resulting in display differences among the light-emitting elements in different regions of the display panel, resulting in the problem of uneven display of the display panel. When the display panel displays a monochromatic picture, there are boundary stripes and uneven brightness problems in different regions, affecting the image display quality of the display panel.

[0065] To solve the above problems, the embodiment of the present application provides a display panel, including: ​

[0066] A display layer, the display layer includes a plurality of first light-emitting units arranged in an array; the first light-emitting unit includes at least one first light-emitting element, and the first light-emitting element emits first-color light; the peak wavelengths of the first light-emitting elements in the same first light-emitting unit satisfy a first preset condition;

[0067] In two adjacent first light-emitting units in a first direction, the peak wavelengths of the first light-emitting elements have a first difference D 1 ; the first direction includes at least one of the row direction and the column direction of the array where the first light-emitting units are located;

[0068] In two adjacent first light-emitting units in a second direction, the peak wavelengths of the first light-emitting elements have a second difference D 2 ; the second direction has an angle greater than 0° and less than 90° with the first direction;

[0069] Wherein, |D 1 -D 2 |>0.

[0070] Based on the above description, in the display panel provided by the technical solution of the present application, since |D 1 -D 2 |>0, that is, D 1 ≠D 2 , it can be ensured that two adjacent first light-emitting units in the first direction and two adjacent first light-emitting units in the second direction correspond to different peak wavelength differences. Through the peak wavelength differentiation design corresponding to the first direction and the second direction, the display effects of the first light-emitting elements with different peak wavelengths in the display panel are complementary. Based on the adapted D 1 and D 2 , the problem of uneven display of the display panel caused by the display differences of the same-color light-emitting elements can be effectively solved.

[0071] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0072] Refer to Figure 2 , Figure 2 which is a schematic diagram of the layout of the first light-emitting elements in a display panel provided by an embodiment of the present application. The display panel includes:

[0073] A display layer, the display layer includes a plurality of first light-emitting units 11 arranged in an array; the first light-emitting unit 11 includes at least one first light-emitting element 111, and the first light-emitting element 111 emits first-color light; the peak wavelengths of the first light-emitting elements 111 in the same first light-emitting unit 11 satisfy a first preset condition;

[0074] Among two adjacent first light-emitting units 11 in the first direction F1, the peak wavelengths of the first light-emitting elements 111 have a first difference D 1 , that is, among the two first light-emitting units 11, the difference in peak wavelengths between the first light-emitting element 111 in one light-emitting unit 11 and the first light-emitting element 111 in the other first light-emitting unit 11 is D 1 ; the first direction F1 includes at least one of the row direction X and the column direction Y of the array where the first light-emitting units 11 are located;

[0075] Among two adjacent first light-emitting units 11 in the second direction F2, the peak wavelengths of the first light-emitting elements 111 have a second difference D 2 , that is, among the two first light-emitting units 11, the difference in peak wavelengths between the first light-emitting element 111 in one light-emitting unit 11 and the first light-emitting element 111 in the other first light-emitting unit 11 is D 2 ; the second direction F2 has an angle greater than 0° and less than 90° with the first direction F1;

[0076] wherein, |D 1 -D 2 |>0.

[0077] In the embodiments of the present application, there is at least one first light-emitting unit 11, and the peak wavelengths between it and other first light-emitting units 11 have a first difference in the first direction F1, and the peak wavelengths between other first light-emitting units 11 have a second difference in the second direction F2. In this way, display complementarity can be achieved through the first light-emitting units 11 with different peak wavelength differences, so as to improve display uniformity.

[0078] In Figure 2 , taking the first direction F1 including the row direction X as an example for illustration, in other cases, the first direction F1 may include the column direction Y, or include both the row direction X and the column direction Y at the same time.

[0079] Optionally, the second direction F2 intersects with the row direction X and the column direction Y respectively. Optionally, the second direction F2 includes: the connection direction between the first light-emitting unit 11 in the i-th row and the j-th column and the first light-emitting unit 11 in the (i + 1)-th row and the (j + 1)-th column, and / or, the connection direction between the first light-emitting unit 11 in the (i + 1)-th row and the j-th column and the first light-emitting unit 11 in the i-th row and the (j + 1)-th column. Both i and j are positive integers, and i does not exceed the total number of rows of the first light-emitting units 11, and j does not exceed the total number of columns of the first light-emitting units 11.

[0080] It should be noted that in the embodiments of the present application, the difference between the peak wavelengths of the two first light-emitting elements 111 is the difference obtained by subtracting the smaller peak wavelength from the larger peak wavelength of the two first light-emitting elements 111, that is, D 1 and D2 are all positive numbers. Based on this setting, D in the following text 3 and D 4 are also all positive numbers. Since the first light-emitting element 111 emits first-color light, the first light-emitting unit 11 is a set of single-color first light-emitting elements.

[0081] The first light-emitting elements 111 in the display layer are arranged in an array. The first light-emitting unit 11 of the same first light-emitting unit has first light-emitting elements 111 arranged in m rows and n columns, where both m and n are positive integers. If m = n = 1, then the first light-emitting unit 11 has one first light-emitting element 111. If at least one of m and n is greater than 1, then the first light-emitting unit 11 has multiple first light-emitting elements 111 arranged in an array. If m is greater than 1, then the m rows of first light-emitting elements 111 in the same first light-emitting unit 11 are m consecutive rows of first light-emitting elements in the first light-emitting element array; if n is greater than 1, then the n columns of first light-emitting elements 111 in the same first light-emitting unit 11 are n consecutive columns of first light-emitting elements in the first light-emitting element array. In Figure 2 the illustrated manner, taking the first light-emitting unit 11 including one first light-emitting element 111 as an example for illustration.

[0082] The display panel includes at least three light-emitting elements with different light-emitting colors, namely a red light-emitting element R, a green light-emitting element G, and a blue light-emitting element B, which are used to emit red light, green light, and blue light respectively. Figure 2 In, taking the first light-emitting element 111 as the blue light-emitting element B as an example for illustration, the first light-emitting element 111 can also be the red light-emitting element R or the green light-emitting element B that emits green light G.

[0083] In the embodiments of the present application, two adjacent first light-emitting units 11 in the first direction F1 refer to two first light-emitting units 11 arranged continuously in the first direction F1, that is, there are no other first light-emitting units 11 between two adjacent first light-emitting units 11 in the first direction F1. There can be light-emitting units including light-emitting elements of other colors (non-first-color light) between two adjacent first light-emitting units 11 in the first direction F1. For example, if the first light-emitting element 111 is the blue light-emitting element B, then there can be a light-emitting unit including the red light-emitting element R and / or a light-emitting unit including the green light-emitting element G between two adjacent first light-emitting units 11 in the first direction F1.

[0084] Similarly, two adjacent first light-emitting units 11 in the second direction F2 refer to two first light-emitting units 11 arranged continuously in the second direction F2, that is, there are no other first light-emitting units 11 between two adjacent first light-emitting units 11 in the second direction F2. There can be light-emitting units including light-emitting elements of other colors between two adjacent first light-emitting units 11 in the second direction F2.

[0085] In the embodiments of the present application, since |D 1 -D 2 |>0, that is, D 1 ≠D 2 , it is possible to make the difference in the main wavelengths of two adjacent first light-emitting units 11 in the first direction F1 correspond to different main wavelength differences from those of two adjacent first light-emitting units 11 in the second direction F2. Through the main wavelength differential design corresponding to the first direction F1 and the second direction F2, the display effects of the first light-emitting elements 111 with different main wavelengths in the display panel are complementary. Based on the adapted D 1 and D 2 , it is possible to effectively solve the problem of uneven display of the display panel caused by the display differences of light-emitting elements of the same color.

[0086] Refer to Figure 3 , Figure 3 which is a schematic diagram of another layout method of the first light-emitting element in the display panel provided by the embodiments of the present application. Figure 3 In Figure 3 , taking the example that the first direction F1 includes the row direction X and the column direction Y for illustration. In other ways, the first direction F1 may also include one of the row direction X and the column direction Y.

[0087] In one implementation manner, as Figure 3 shown, among the nine first light-emitting units 11 arranged in a 3×3 pattern in the array where the first light-emitting unit 11 is located, the first light-emitting unit 11 located in the middle is set as the first main light-emitting unit 110. In the first direction F1, the difference in the main wavelengths between the first light-emitting element 111 in the first main light-emitting unit 110 and the first light-emitting elements 111 in the adjacent first light-emitting units 11 is D 1 . In the second direction F2, the difference in the main wavelengths between the first light-emitting element 111 in the first main light-emitting unit 110 and the first light-emitting elements 111 in the adjacent first light-emitting units 11 is D 2 .

[0088] Among them, the first main light-emitting unit 110 is the first light-emitting unit 111 at a non-four-edge position in the first light-emitting unit array. Therefore, when the first direction F1 includes the row direction X and the column direction Y, the first main light-emitting unit 110 has four adjacent first light-emitting units 11 in the first direction F1. When the second direction F2 includes two diagonal directions, the first main light-emitting unit 110 has four adjacent first light-emitting units 11 in the second direction F2.

[0089] In Figure 3In the figure, taking the first light-emitting unit 11 including a first light-emitting element 111 as an example for illustration. The main wavelength difference between the first light-emitting element 11 located in the middle and the four first light-emitting elements 111 adjacent in the row direction X and the column direction Y is D 1 , the main wavelength difference between the first light-emitting element 11 located in the middle and the four first light-emitting elements 111 adjacent in the array diagonal direction is D 2 .

[0090] As Figure 3 shown, taking the first light-emitting element 111 as a blue light-emitting element B as an example, the main wavelength of the blue light emitted by the first light-emitting element 111 in the first main light-emitting unit 110 can be set to λ B2 or approximately λ B2 . In the first direction F1, the main wavelengths of the first light-emitting elements 111 in each of the first light-emitting units 11 adjacent to the first main light-emitting unit 110 are the same or approximately the same, and the main wavelength of each of the first light-emitting units 11 adjacent to the first main light-emitting unit 110 in the first direction F1 can be λ B1 or approximately λ B1 . In the second direction F2, the main wavelengths of the first light-emitting elements 111 in each of the first light-emitting units 11 adjacent to the first main light-emitting unit 110 are the same or approximately the same, and the main wavelength of each of the first light-emitting units 11 adjacent to the first main light-emitting unit 110 in the second direction F2 can be λ B2 or approximately λ B2 . In this way, the display layer includes two blue light-emitting elements B with different main wavelengths, namely B1 and B2, and their main wavelengths are λ B1 and λ B2 respectively. Among them, λ B2 ≠λ B2 .

[0091] Optionally, D 1 can be set such that D 2 > D

[0092] . In this way, in two first light-emitting units 11 adjacent in the first direction F1, the main wavelength difference of the first light-emitting elements 111 is small, and the first light-emitting elements 111 in the two first light-emitting units 11 have the same or approximately the same main wavelength; the main wavelength difference of the two first light-emitting units 11 adjacent in the second direction F1 is small, so as to achieve the complementarity of the corresponding main wavelength differences of the first light-emitting units 11 adjacent in the first direction F1 and the corresponding main wavelength differences of the first light-emitting units 11 adjacent in the second direction F2, and realize the complementary display effects of the first light-emitting elements 111 with different main wavelengths in the display panel, so as to improve the overall display uniformity of the display panel.

[0092] Taking the first light-emitting element 111 as a blue light-emitting element B as an example, as Figure 3 shown, since D1 > D 2 For the first light-emitting element 111 in the first main light-emitting unit 110, although there are differences |λ B1 - λ B2 | in the peak wavelengths between it and the four adjacent first light-emitting elements 111 in the first direction F1, the differences |λ B2 - λ B1 - λ B2 | in the first direction F1 can be compensated by the first light-emitting elements 111 with the same peak wavelength λ adjacent in the second direction F2, so as to achieve complementary display effects of the first light-emitting elements 111 with different peak wavelengths in the display panel.

[0093] In an implementation manner of the embodiment of the present application, the first preset condition is: the first light-emitting unit 11 includes one first light-emitting element 111; or, the first preset condition is: the first light-emitting unit 11 includes p first light-emitting elements, where p is a positive integer greater than 1, and the difference in peak wavelength between two first light-emitting elements 111 in the same first light-emitting unit 11 is not greater than the first threshold, where D 1 > D 2 and the first threshold is less than or equal to D 2 .

[0094] Optionally, in the same first light-emitting unit 11, if there are multiple first light-emitting elements 111, for one first light-emitting element 111, the difference in peak wavelength between it and other first light-emitting elements 111 can be set to the first threshold.

[0095] If the first light-emitting unit 11 includes one first light-emitting element 111, then in the first light-emitting element array, the difference in peak wavelength between two adjacent first light-emitting elements 111 in the first direction F1 is D 1 , and the difference in peak wavelength between two adjacent first light-emitting elements 11 in the second direction F2 is D 2 . Through the unequal differences in peak wavelength, complementary display effects are achieved between two adjacent first light-emitting elements 111 in the first direction F1 and two adjacent first light-emitting elements 111 in the second direction F2, so as to reduce the display non-uniformity problem caused by display differences of the first light-emitting elements 111 in the display panel.

[0096] If the first light-emitting unit 11 includes p first light-emitting elements 111, the first light-emitting element array is divided into multiple sub-arrays. Each sub-array serves as a first light-emitting unit 11 and includes p first light-emitting elements 111. The p first light-emitting elements 111 in the same first light-emitting unit 11 are arranged in m rows and n columns, and p = m * n. Since the first threshold is less than or equal to D 2, so the p first light-emitting elements 111 in the same first light-emitting unit 11 have the same or similar dominant wavelengths, facilitating the design of a scheme for complementary dominant wavelength of the p first light-emitting elements 111 in the first light-emitting unit 11 as a whole with the p first light-emitting elements 111 in other first light-emitting units 11.

[0097] Reference Figure 4 , Figure 4 FIG. is a schematic diagram of another layout manner of the first light-emitting elements in the display panel provided by the embodiment of the present application. On the basis of the above embodiment, Figure 4 In the manner shown, in the array where the first light-emitting unit 11 is located, in the row direction X, the first light-emitting units 11 with the first dominant wavelength and the first light-emitting units 11 with the second dominant wavelength are arranged alternately; in the column direction Y, the first light-emitting units 11 with the first dominant wavelength and the first light-emitting units 11 with the second dominant wavelength are arranged alternately; wherein, the difference between the first dominant wavelength and the second dominant wavelength is not less than the second threshold, where D 1 > D 2 , and the second threshold is greater than or equal to D 1 . Set the first dominant wavelength as λ 1 , and the second dominant wavelength as λ 2 , |λ 1 - λ 2 | ≥ D 1 .

[0098] If the first light-emitting unit 11 has one light-emitting element 111, the light-emitting element 111 with the first dominant wavelength in the first light-emitting unit 11 has a dominant wavelength of λ 1 , and the light-emitting element 111 with the second dominant wavelength in the first light-emitting unit 11 has a dominant wavelength of λ 2 . If the first light-emitting unit 11 has p first light-emitting elements 111, the dominant wavelengths of the respective first light-emitting elements 111 in the first light-emitting unit 11 with the first dominant wavelength are λ 1 or approximately equal to λ 1 , and the dominant wavelengths of the respective first light-emitting elements 111 in the first light-emitting unit 11 with the second dominant wavelength are λ 2 or approximately equal to λ 2 .

[0099] In one implementation manner, in the array where the first light-emitting unit 11 is located, it can be as Figure 4As shown, in each row, the first light-emitting units 11 with the first main wavelength and the first light-emitting units 11 with the second main wavelength are arranged alternately. In each column, the first light-emitting units 11 with the first main wavelength and the first light-emitting units 11 with the second main wavelength are arranged alternately. In both rows and columns, the first light-emitting units 11 with the first main wavelength and the first light-emitting units 11 with the second main wavelength are arranged alternately. Through the regular periodic arrangement of the first light-emitting units 11 with two main wavelengths, the display effects of the first light-emitting elements 111 with two main wavelengths in the display panel are complemented, so as to reduce the display unevenness problem caused by the display differences of the first light-emitting elements 111 in the display panel.

[0100] In other ways, it is also possible to arrange the first light-emitting units 11 with the first main wavelength and the first light-emitting units 11 with the second main wavelength alternately in at least one row of the first light-emitting units 11, and / or arrange the first light-emitting units 11 with the first main wavelength and the first light-emitting units 11 with the second main wavelength alternately in at least one column of the first light-emitting units 11, so as to achieve the display complementarity of different main wavelengths through the alternate arrangement of the first light-emitting units 11 with two main wavelengths in the first direction F1 and improve the display uniformity.

[0101] In the embodiments of the present application, if the first light-emitting unit 11 includes one first light-emitting element 111, the main wavelength of the first light-emitting unit 11 is the main wavelength of this first light-emitting element 111. If the first light-emitting unit 11 includes multiple first light-emitting elements 111 and the main wavelengths of these multiple first light-emitting elements 111 are the same or approximately the same, the main wavelength of the first light-emitting unit 11 is the average value of the main wavelengths of these multiple first light-emitting elements 111, or the equivalent main wavelength when these multiple first light-emitting elements 111 emit light simultaneously.

[0102] Reference Figure 5 , Figure 5 is a schematic diagram of another layout method of the first light-emitting element in the display panel provided by the embodiments of the present application. On the basis of the above embodiments, Figure 5 In the shown method, the first light-emitting unit 11 includes a first main light-emitting unit 110. The sum of the absolute values of the differences in the main wavelengths between the first main light-emitting unit 110 and the four adjacent first light-emitting units 11 in the first direction F1 is the first sum value. The sum of the absolute values of the differences in the main wavelengths between the first main light-emitting unit 11 and the four adjacent first light-emitting units 111 in the second direction F2 is the second sum value; among them, the first sum value is greater than or less than twice the second sum value. For the array where the first light-emitting unit 11 is located, among the nine first light-emitting units 11 at the intersection of three consecutive rows and three consecutive columns, the first light-emitting unit 11 in the middle is the first main light-emitting unit 110.

[0103] Such as Figure 5As shown, the nine first light-emitting units 11 are set as P1 to P9 in sequence, and the peak wavelengths are λ P1 to λ P9 , and P5 is the first main light-emitting unit 110. Set the first sum value as S 1 , and the second sum value as S 2 , then the following relationship is satisfied:

[0104] S 1 =|λ P5 -λ P2 |+|λ P5 -λ P4 |+|λ P5 -λ P6 |+|λ P5 -λ P8 |

[0105] S 2 =|λ P5 -λ P1 |+|λ P5 -λ P3 |+|λ P5 -λ P7 |+|λ P5 -λ P9 |

[0106] S 1 ≥2S 2

[0107] In the manner shown in Figure 5 , since S 1 ≥2S 2 , although there are large differences in the peak wavelengths of P5 and P2, P4, P6, P8 adjacent to the first direction F1, the differences in the peak wavelengths of P5 and P1, P3, P7, P9 adjacent to the second direction F2 are small. The peak wavelength differences between P5 and P2, P4, P6, P8 can be compensated by P1, P3, P7, P9, so as to achieve the complementary display effects of the first light-emitting elements 111 with different peak wavelengths in the display panel, and reduce the display non-uniformity problem caused by the display differences of the first light-emitting elements 111 in the display panel.

[0108] Optionally, in the manner shown in Figure 5 , it is possible to set that P2, P4, P6, P8 have the same or similar peak wavelengths. For example, the peak wavelengths of these first light-emitting units 11 can be equal to or approximately equal to the first peak wavelength. It is possible to set that P1, P3, P5, P7, P9 have the same or similar peak wavelengths. For example, the peak wavelengths of these first light-emitting units 11 can be equal to or approximately equal to the second peak wavelength, and the first peak wavelength and the second peak wavelength are not equal, so that the peak wavelength of P5 and the first light-emitting units 11 adjacent to the first direction F1 have a first difference D11 and has a second difference D from the main wavelength of the first light-emitting unit 11 adjacent in the second direction F2 2 , and satisfies D 1 > D 2 .

[0109] Reference Figure 6 , Figure 6 is the display effect diagram when the display panel provided by the embodiment of the present application displays a monochromatic picture. Taking the first light-emitting element 111 as a blue light-emitting element B, when the display panel displays a pure blue picture, relative to Figure 1 the shown manner, when arranging the blue light-emitting element B based on the technical solution of the embodiment of the present application, the display picture uniformity can be effectively improved, and the boundary stripes and brightness non-uniformity problems in different regions can be eliminated.

[0110] For a first main light-emitting unit 110, when the first main light-emitting unit 110 has a relatively large main wavelength difference from the first light-emitting unit 11 adjacent in the first direction F1 (i.e., the above-mentioned first difference D 1 ), the first main light-emitting unit 110 can be set to have a relatively small main wavelength difference from the first light-emitting unit 11 adjacent in the second direction F2 (i.e., the above-mentioned second difference D 2 ). Based on the differential design of the main wavelength differences corresponding to the first main light-emitting unit 110 in the first direction F1 and the second direction F2, the display panel can achieve the complementary display effects of the first light-emitting elements 111 with different main wavelengths.

[0111] In the embodiment of the present application, the first light-emitting unit 11 includes at least one first light-emitting element 111 that emits first-color light. The first light-emitting unit 11 is a set of first light-emitting elements 111. It can be set that the first light-emitting unit includes first light-emitting elements 111 arranged in m rows and n columns, and both m and n are positive integers.

[0112] As described above, the embodiment of the present application can design the first difference D 1 and the second difference D 2To achieve complementary display effects of the first light-emitting elements 111 with different main wavelengths, if the value of m or n is greater than 2, each first light-emitting unit 11 will have a relatively large number of first light-emitting elements 111. For a first main light-emitting unit 110, the first main light-emitting unit 110 and the first light-emitting unit 11 adjacent in the first direction F1 will have a relatively large area region. Correspondingly, the first main light-emitting unit 110 and the first light-emitting unit 11 adjacent in the second direction F2 also have a relatively large area region. When compensating for the display unevenness problem caused by the main wavelength difference between the first main light-emitting unit 110 and the first light-emitting unit 11 adjacent in the first direction F1 through the first light-emitting unit 11 adjacent to the first main light-emitting unit 110 in the second direction F2, the compensation effect will be significantly reduced due to the above-mentioned large area, resulting in a display stripe problem when the user views the display image at a close distance.

[0113] To solve the above problems, m and n can be set as positive integers not greater than 2, which can make the first light-emitting unit 11 have a moderate number of first light-emitting elements 111, avoid the first main light-emitting unit 110 and the first light-emitting unit 11 adjacent in the first direction F1 occupying a relatively large area region, and at the same time avoid the first main light-emitting unit 110 and the first light-emitting unit 11 adjacent in the second direction F2 occupying a relatively large area region. Thus, the display panel can achieve display compensation between the first light-emitting elements 111 with different main wavelengths in a relatively small area region, so as to have a better image display effect when the user views the display image at a close distance.

[0114] For a display panel used to display images to users at a long distance, such as an outdoor advertising display screen and an indoor advertising display screen, etc., since it is mainly used to display display images for users at a relatively long distance, at this time, m and / or n can also be set to be greater than 2. At this time, the user is at a relatively large distance from the display panel, the image distance of the first light-emitting unit 11 relative to the human eye is relatively large, the image area formed by the first main light-emitting unit 110 and the first light-emitting unit 11 adjacent in the first direction F1 in the human eye is relatively small, and the image area formed by the first main light-emitting unit 110 and the first light-emitting unit 11 adjacent in the second direction F2 in the human eye is relatively small. Under the condition of viewing at a long distance, it is also possible to design based on the difference in the main wavelength difference corresponding to the first main light-emitting unit 110 in the first direction F1 and the second direction F2, so that the display panel can achieve complementary display effects of the first light-emitting elements 111 with different main wavelengths.

[0115] In the embodiment of the present application, the display layer may have c first light-emitting units 11 with c different main wavelengths, where c is a positive integer greater than 1; the display layer is evenly divided into a plurality of sub-display areas arranged in an array; in the same sub-display area, the number of first light-emitting units is not less than c, and at least c first light-emitting units 11 have different main wavelengths.

[0116] Based on the above embodiments, not only can display complementarity be achieved among the first light-emitting elements 111 with different main wavelengths, but further, the display layer is evenly divided into a plurality of sub-display areas. The sub-display area includes at least c first light-emitting units 11, so that the sub-display area can include c first light-emitting units 11 with different main wavelengths. In this way, for the same sub-display area, it is convenient to form display complementarity among the c first light-emitting units 11 with different main wavelengths within the sub-display area, realize wavelength complementarity among the first light-emitting units 11 with different main wavelengths within the same sub-display area, and improve the display uniformity of the sub-display area. In addition, since each sub-display area includes the above c first light-emitting units 11 with different main wavelengths, the sub-display areas can have the same display effect, avoiding the problem of uneven display caused by differences in the types of main wavelengths among different sub-display areas.

[0117] Dividing the display layer into a plurality of sub-display areas and arranging the first light-emitting units 11 based on the sub-display areas can also enable the display layer to achieve a periodic regular arrangement of the first light-emitting units 11 with different main wavelengths based on the sub-display areas, facilitating the layout design of the first light-emitting elements 111 in the display layer.

[0118] Optionally, the sub-display area may include the first light-emitting units 11 arranged in 3 rows and 3 columns. In this way, it is convenient for the display layer to achieve a periodic regular arrangement of the first light-emitting elements 111 with different main wavelengths based on the sub-display area, and it is also convenient for the first light-emitting elements 111 in the sub-display area to be arranged Figure 5 in the nine-grid manner shown, so as to facilitate arranging the positions of each first light-emitting element 111 in the sub-display area according to the main wavelength of the light-emitting element, facilitating the implementation of the design of the scheme of S 1 ≥2S 2 .

[0119] Referring to Figure 7 , Figure 7 which is a schematic diagram of another layout method of the first light-emitting element in the display panel provided by the embodiment of the present application. Based on the above embodiments, Figure 7 in the manner shown, c = 2, each first light-emitting unit 11 has one first light-emitting element 111 (i.e., m = n = 1), and each sub-display area 12 has the first light-emitting units 11 arranged in 3 rows and 3 columns. Taking the first light-emitting element 111 as a blue light-emitting element B as an example, the two blue light-emitting elements B with different main wavelengths are B1 and B2 respectively.

[0120] In Figure 7In the shown manner, if the first light-emitting element 111 of the first main light-emitting unit 110 in the sub-display area 12 is B1, then the first light-emitting elements 111 of all the first light-emitting units 11 adjacent to the first main light-emitting unit 110 in the first direction F1 are all B2, and the first light-emitting elements 111 of all the first light-emitting units 11 adjacent to the first main light-emitting unit 110 in the second direction F2 are all B1, satisfying D 1 > D 2 If the first light-emitting element 111 in the first main light-emitting unit 110 in the sub-display area 12 is B2, then the first light-emitting elements 111 of all the first light-emitting units 11 adjacent to the first main light-emitting unit 110 in the first direction F1 are all B1, and the first light-emitting elements 111 of all the first light-emitting units 11 adjacent to the first main light-emitting unit 110 in the second direction F2 are all B2, satisfying D 1 > D 2 .

[0121] Reference Figure 8 , Figure 8 is a schematic diagram of the layout of the first light-emitting elements in another display panel provided by the embodiment of the present application. On the basis of the above embodiment, Figure 8 In the shown manner, c = 2, each first light-emitting unit 11 has 2 first light-emitting elements 111 arranged continuously in the column direction Y (i.e., m = 2, n = 1), and each sub-display area 12 has 3 rows and 3 columns of first light-emitting units 11. Figure 8 Taking the first light-emitting element 111 as a blue light-emitting element B for example, the two blue light-emitting elements B with different main wavelengths are B1 and B2 respectively.

[0122] In Figure 8 the shown manner, for the sub-display area 12 with 2 B1s as the first main light-emitting unit 110 and the sub-display area 12 with 2 B2s as the first main light-emitting unit 110, both can satisfy D 1 > D 2 .

[0123] Reference Figure 9 , Figure 9 is a schematic diagram of the layout of the first light-emitting elements in another display panel provided by the embodiment of the present application. On the basis of the above embodiment, Figure 9 In the shown manner, c = 2, each first light-emitting unit 11 has 2 first light-emitting elements 111 arranged continuously in the row direction X (i.e., m = 1, n = 2), and each sub-display area 12 has 3 rows and 3 columns of first light-emitting units 11. Figure 9 Taking the first light-emitting element 111 as a blue light-emitting element B for example, the two blue light-emitting elements B with different main wavelengths are B1 and B2 respectively.

[0124] In Figure 9In the shown manner, for the sub-display area 12 with two B1s as the first main light-emitting units 110 and the sub-display area 12 with two B2s as the first main light-emitting units 110, both can satisfy D 1 >D 2 。

[0125] Reference Figure 10 , Figure 10 is a schematic diagram of the layout of the first light-emitting elements in another display panel provided by the embodiment of the present application. On the basis of the above embodiment, Figure 10 In the shown manner, c = 2, each first light-emitting unit 11 has 4 first light-emitting elements 111 arranged continuously in 2 rows and 2 columns (i.e., m = n = 2), and each sub-display area 12 has first light-emitting units 11 arranged in 3 rows and 3 columns. Figure 10 Similarly, taking the first light-emitting element 111 as a blue light-emitting element B, the two blue light-emitting elements B with different main wavelengths are B1 and B2 respectively.

[0126] In Figure 10 the shown manner, for the sub-display area 12 with 4 B1s as the first main light-emitting units 110 and the sub-display area 12 with 4 B2s as the first main light-emitting units 110, both can satisfy D 1 >D 2 。

[0127] In Figures 7 - 10 the shown manner, it is illustrated by taking the first direction F1 including the row direction X and the column direction Y, and the second direction F2 including two diagonal directions as examples. In these manners, the display panel includes first light-emitting units 11 with two main wavelengths, that is, c = 2. Taking the first light-emitting element 11 as a blue light-emitting element B as an example, one type of first light-emitting unit 11 includes two first blue light elements B1, and the other type of first light-emitting unit 11 includes two second blue light elements B2. The first blue light element B1 and the second blue light element B2 have different main wavelengths, and the difference between their main wavelengths is not less than the second threshold.

[0128] For the convenience of illustration, in Figures 7 - 10 the shown manner, only four sub-display areas 12 are shown. In the actual display panel, the number of sub-display areas 12 can be arranged according to the number of first light-emitting elements 111 in the display panel, and it is not limited to the illustrated manner of the embodiment of the present application.

[0129] In an embodiment of the present application, in the first direction F1, the main wavelengths of two adjacent first light-emitting units 11 have a first difference, which is convenient for the layout of each first light-emitting unit 11 in the first direction. In this manner, it can be set that the main wavelengths of adjacent first light-emitting units 11 in the row direction X have a first difference; or the main wavelengths of adjacent first light-emitting units 11 in the column direction Y have a first difference; or asFigures 7 - 10 As shown in any of the above ways, the dominant wavelengths of adjacent first light-emitting units 11 in the row direction X all have a first difference, and the dominant wavelengths of adjacent first light-emitting units 11 in the column direction Y all have a first difference.

[0130] In the embodiments of the present application, as described above, the first light-emitting unit 11 has first light-emitting elements 111 arranged in m rows and n columns, where both m and n are positive integers. When c = 2, m = n = 1, or at least one of m and n is greater than 1.

[0131] As Figure 7 shown, when c = 2 and m = n = 1, at this time, the first light-emitting unit 11 includes 1 first light-emitting element 111. In this way, in the row direction X and the column direction Y, two first light-emitting unit elements 111 with different dominant wavelengths are alternately arranged, so that the first light-emitting elements 111 of the two dominant wavelengths achieve display complementarity to improve display uniformity.

[0132] As Figure 8 shown, when c = 2 and m = 2, n = 1, at this time, the first light-emitting unit 11 includes 2 first light-emitting elements 111 arranged continuously in the column direction Y. In this way, in the row direction X and the column direction Y, two first light-emitting unit elements 111 with different dominant wavelengths are alternately arranged, so that the first light-emitting elements 111 of the two dominant wavelengths achieve display complementarity to improve display uniformity.

[0133] As Figure 9 shown, when c = 2 and m = 1, n = 2, at this time, the first light-emitting unit 11 includes 2 first light-emitting elements 111 arranged continuously in the row direction X. In this way, in the row direction X and the column direction Y, two first light-emitting unit elements 111 with different dominant wavelengths are alternately arranged, so that the first light-emitting elements 111 of the two dominant wavelengths achieve display complementarity to improve display uniformity.

[0134] As Figure 10 shown, when c = 2 and m = n = 2, at this time, the first light-emitting unit 11 includes 4 first light-emitting elements 111 arranged in 2 rows and 2 columns. In this way, in the row direction X and the column direction Y, two first light-emitting unit elements 111 with different dominant wavelengths are alternately arranged, so that the first light-emitting elements 111 of the two dominant wavelengths achieve display complementarity to improve display uniformity.

[0135] When c = 2, the values of m and n are not limited to Figures 7 - 11 the shown ways. When the display panel is used in a scenario for displaying images at a long distance, m and / or n can also be greater than 2.

[0136] Referring to Figure 11 , Figure 11Schematic diagram of another layout method of the first light-emitting element in the display panel provided by the embodiment of the present application. On the basis of the above embodiment, Figure 11 In the shown method, c = 3, each first light-emitting unit 11 has one first light-emitting element 111 (i.e., m = n = 1), and each sub-display area 12 has first light-emitting units 11 arranged in 3 rows and 3 columns. In this method, the first direction F1 includes the row direction X and the column direction Y, the second direction F2 includes a diagonal direction, the first light-emitting element 111 is a blue light-emitting element B, and the three blue light-emitting elements B with different main wavelengths are B1, B2, and B3 respectively. The second direction F2 is the diagonal direction between the positive direction of the row direction X and the positive direction of the column direction Y shown in Figure 11 .

[0137] In Figure 11 the shown method, for any two adjacent first light-emitting units 11 in the first direction F1, the first light-emitting element 111 in one first light-emitting unit 11 is one of B1, B2, and B3, and the first light-emitting element 111 in the other first light-emitting unit 11 is another one of B1, B2, and B3, that is, D 1 is the difference in the main wavelengths of two of B1, B2, and B3. Since the main wavelengths of B1, B2, and B3 are not equal to each other, D 1 is greater than 0. Some first light-emitting units 11 have first light-emitting elements 111 with the same emission color as the first light-emitting units 11 adjacent in the second direction F2. As shown in Figure 11 , in the second direction F2, there are multiple pairs of adjacent B1, multiple pairs of adjacent B2, and multiple pairs of adjacent B3. For a pair of adjacent B1, a pair of adjacent B2, and a pair of adjacent B3, the corresponding D 2 are all 0, so all satisfy D 1 > D 2 .

[0138] Refer to Figure 12 . Figure 12 Schematic diagram of another layout method of the first light-emitting element in the display panel provided by the embodiment of the present application. On the basis of the above embodiment, Figure 12 In the shown method, c = 3, each first light-emitting unit 11 has one first light-emitting element 111 (i.e., m = n = 1), and each sub-display area 12 has first light-emitting units 11 arranged in 3 rows and 2 columns. In this method, the first direction F1 includes the row direction X and the column direction Y, the second direction F2 includes a diagonal direction, the first light-emitting element 111 is a blue light-emitting element B, and the three blue light-emitting elements B with different main wavelengths are B1, B2, and B3 respectively. The second direction F2 is the diagonal direction between the positive direction of the row direction X and the positive direction of the column direction Y shown in Figure 12 .

[0139] In Figure 12In the shown manner, for any two adjacent first light-emitting units 11 in the first direction F1, the first light-emitting element 111 in one first light-emitting unit 11 is one of B1, B2, and B3, and the first light-emitting element 111 in the other first light-emitting unit 11 is the other of B1, B2, and B3, that is, D 1 is the difference in the peak wavelengths of two of B1, B2, and B3. Since the peak wavelengths of B1, B2, and B3 are not equal to each other, D 1 is greater than 0. Some of the first light-emitting units 11 have first light-emitting elements 111 with the same emission color as the first light-emitting units 11 adjacent in the second direction F2. As Figure 12 shown, in the second direction F2, there are multiple pairs of adjacent B1, multiple pairs of adjacent B2, and multiple pairs of adjacent B3. For a pair of adjacent B1, a pair of adjacent B2, and a pair of adjacent B3, the corresponding D 2 is all 0, so all satisfy D 1 >D 2 .

[0140] Reference Figure 13 , Figure 13 is a schematic diagram of the layout of the first light-emitting elements in another display panel provided by an embodiment of the present application. On the basis of the above-described embodiment,[[]] Figure 13 in the shown manner, c = 3, each first light-emitting unit 11 has one first light-emitting element 111 (that is, m = n = 1), and each sub-display area 12 has 2 rows and 2 columns of first light-emitting units 11. In this manner, the first direction F1 includes the row direction X and the column direction Y, the second direction F2 includes a diagonal direction, and the first light-emitting element 111 is a blue light-emitting element B. The three blue light-emitting elements B with different peak wavelengths are B1, B2, and B3 respectively. The second direction F2 is the diagonal direction between the positive direction of the row direction X and the positive direction of the column direction Y shown in Figure 13 .

[0141] In Figure 13 the shown manner, for any two adjacent first light-emitting units 11 in the first direction F1, the first light-emitting element 111 in one first light-emitting unit 11 is one of B1, B2, and B3, and the first light-emitting element 111 in the other first light-emitting unit 11 is the other of B1, B2, and B3, that is, D 1 is the difference in the peak wavelengths of two of B1, B2, and B3. Since the peak wavelengths of B1, B2, and B3 are not equal to each other, D 1 is greater than 0. Some of the first light-emitting units 11 have first light-emitting elements 111 with the same emission color as the first light-emitting units 11 adjacent in the second direction F2. As Figure 13 shown, in the second direction F2, there are multiple pairs of adjacent B2. For a pair of adjacent B2, the corresponding D 2 is 0, so it satisfies D1 > D 2 。

[0142] Reference Figure 14 , Figure 14 is a schematic diagram of another layout method of the first light-emitting element in the display panel provided by the embodiment of the present application. On the basis of the above embodiment, Figure 14 In the shown method, c = 4, each first light-emitting unit 11 has one first light-emitting element 111 (i.e., m = n = 1), and each sub-display area 12 has 4 rows and 4 columns of first light-emitting units 11. In this method, the first direction F1 includes the row direction X and the column direction Y, the second direction F2 includes a diagonal direction, the first light-emitting element 111 is a blue light-emitting element B, and the four blue light-emitting elements B with different main wavelengths are B1, B2, B3, and B4 respectively. The second direction F2 is the diagonal direction between the positive direction of the row direction X and the positive direction of the column direction Y shown in Figure 14 .

[0143] In Figure 14 the shown method, for any two adjacent first light-emitting units 11 in the first direction F1, the first light-emitting element 111 in one first light-emitting unit 11 is one of B1, B2, B3, and B4, and the first light-emitting element 111 in the other first light-emitting unit 11 is another one of B1, B2, B3, and B4, that is, D 1 is the difference in the main wavelengths of two of B1, B2, B3, and B4. Since the main wavelengths of B1, B2, and B3 are not equal to each other, D 1 is greater than 0. Some first light-emitting units 11 have first light-emitting elements 111 with the same emission color as the first light-emitting units 11 adjacent in the second direction F2. As shown in Figure 13 , in the second direction F2, there are multiple pairs of adjacent B1, multiple pairs of adjacent B2, multiple pairs of adjacent B3, and multiple pairs of adjacent B4. For a pair of adjacent B1, a pair of adjacent B2, a pair of adjacent B3, and a pair of adjacent B4, the corresponding D 2 are all 0, so they all satisfy D 1 > D 2 。

[0144] Reference Figure 15 , Figure 15 is a schematic diagram of another layout method of the first light-emitting element in the display panel provided by the embodiment of the present application. On the basis of the above embodiment, Figure 15In the shown manner, c = 4, each first light-emitting unit 11 has one first light-emitting element 111 (i.e., m = n = 1), and each sub-display area 12 has first light-emitting units 11 arranged in 2 rows and 2 columns. In this manner, the first direction F1 includes the column direction Y, the second direction F2 includes a diagonal direction, the first light-emitting element 111 is a blue light-emitting element B, and the four blue light-emitting elements B with different main wavelengths are B1, B2, B3, and B4 respectively. The second direction F2 is the diagonal direction between the positive direction of the row direction X and the positive direction of the column direction Y shown in Figure 14 the diagonal direction between the positive direction of the row direction X and the positive direction of the column direction Y shown in

[0145] In Figure 15 the shown manner, the difference in main wavelengths between B1 and B3 and the difference in main wavelengths between B2 and B4 are both greater than the difference in main wavelengths between B2 and B3. In the first direction F1, B1 and B3 are adjacent, and B2 and B4 are adjacent, so D 1 is the difference in main wavelengths between B1 and B3 or the difference in main wavelengths between B2 and B4. In the second direction F2, B2 and B3 are adjacent, and D 2 is the difference in main wavelengths between B2 and B3. Therefore, this manner also satisfies D 1 > D 2 .

[0146] Referring to Figure 16 , Figure 16 which is a schematic diagram of the layout manner of the first light-emitting elements in another display panel provided by the embodiment of the present application. On the basis of the above embodiment, Figure 16 in the shown manner, c = 4, each first light-emitting unit 11 has one first light-emitting element 111 (i.e., m = n = 1), and each sub-display area 12 has first light-emitting units 11 arranged in 2 rows and 4 columns. In this manner, the first direction F1 includes the row direction X and the column direction Y, the second direction F2 includes two diagonal directions, the first light-emitting element 111 is a blue light-emitting element B, and the four blue light-emitting elements B with different main wavelengths are B1, B2, B3, and B4 respectively.

[0147] In Figure 16 the shown manner, the difference in main wavelengths between B1 and B3, the difference in main wavelengths between B1 and B4, and the difference in main wavelengths between B2 and B4 are all greater than the difference in main wavelengths between B2 and B3, and are all greater than the difference in main wavelengths between B3 and B4. In the first direction F1, B1 and B3 are adjacent, B2 and B4 are adjacent, and B1 and B4 are adjacent, so D 1 is the difference in main wavelengths between B1 and B3, or the difference in main wavelengths between B2 and B4, or the difference in main wavelengths between B1 and B4. In the second direction F2, B2 is adjacent, B2 and B3 are adjacent, and B3 and B4 are adjacent, so D 2is the main wavelength difference between B2 and B2, or the main wavelength difference between B2 and B3, or the main wavelength difference between B3 and B4. Therefore, this method also satisfies D 1 > D 2 .

[0148] In an implementation manner of the embodiment of the present application, when c is greater than 2, m = n = 1. As Figures 11 - 13 shown, when c = 3, m = n = 1. As Figures 14 - 16 shown, when c = 4, m = n = 1. This method can avoid having too many first light-emitting elements 111 in the sub-display area 12, and can avoid the situation that a single sub-display area 12 occupies a relatively large area in the display panel and affects the compensation effect between the first light-emitting elements 111 with different main wavelengths.

[0149] If c > 2, c can be set to 3 or 4. If c > 4, it will lead to having too many first light-emitting elements 111 in the sub-display area 12, resulting in a relatively large area occupied by a single display area 12 in the display panel and affecting the compensation effect between the first light-emitting elements 111 with different main wavelengths.

[0150] In an implementation manner of the embodiment of the present application, when c is greater than 2, in the same sub-display area 12, in the first direction F1, the main wavelengths of c consecutive first light-emitting units 11 are different from each other. In this method, as Figure 11 and Figure 14 shown, for the same sub-display area 12, in the first direction F1, the main wavelengths of c consecutive first light-emitting units 11 in each row and each column are different from each other. Or, as Figure 12 and Figure 16 shown, for the same sub-display area 12, in the first direction F1, the main wavelengths of c consecutive first light-emitting units 11 in each row or each column are different from each other. This method can enable display complementarity among c first light-emitting units 11 with different main wavelengths arranged continuously in the first direction F1.

[0151] Optionally, in the display panel, the main wavelengths of any c consecutive first light-emitting units 11 in each row and each column can be set to be different from each other. In this way, c first light-emitting units 11 with different main wavelengths can be evenly and orderly distributed in the display panel, and better display complementarity can be achieved among the first light-emitting units 11 with different main wavelengths.

[0152] In an implementation manner of the embodiment of the present application, when c is greater than 2, in the same sub-display area 12, in the first direction F1, the main wavelengths of two adjacent first light-emitting units 11 have a first difference D 1 ; in the second direction F2, the main wavelengths of two adjacent first light-emitting units 11 have a second difference D 2In this way, within the same sub-display area 12, complementary display can be achieved by the first light-emitting units 11 with the first difference D 1 and the first light-emitting units 11 with the second difference D 2 , and complementary display can be achieved among the first light-emitting units 11 with different peak wavelengths within the same sub-display area 12, so as to improve display uniformity.

[0153] When c is greater than 2, as shown in Figure 13 and Figure 15 , among the first light-emitting units 11 in the same row, the first light-emitting units 11 with two different peak wavelengths are arranged alternately in sequence; among the first light-emitting units 11 in the same column, the first light-emitting units 11 with two different peak wavelengths are arranged alternately in sequence. In this way, in each row and each column, the first light-emitting units 11 with two different peak wavelengths are arranged alternately in sequence, and complementary display can be achieved by the first light-emitting units 11 based on two peak wavelengths in each row and each column, so as to improve display uniformity.

[0154] When c is greater than 2, as shown in Figure 12 and Figure 16 , for one of the row direction X and the column direction Y, the first light-emitting units 11 with two different peak wavelengths are arranged alternately in sequence; for the other of the row direction X and the column direction Y, the peak wavelengths of the consecutive c first light-emitting units 11 are different from each other. In this way, for one of the row direction X and the column direction Y, complementary display is achieved by the first light-emitting units 11 based on two peak wavelengths, and for the other, complementary display is achieved by the first light-emitting units 11 based on c peak wavelengths, so as to improve display uniformity.

[0155] Referring to Figure 17 , Figure 17 is a schematic diagram of another layout manner of the first light-emitting elements in the display panel provided by the embodiment of the present application. On the basis of the above embodiments, Figure 17 in the manner shown, c = 4, each first light-emitting unit 11 has a first light-emitting element 111 (i.e., m = n = 1), and each sub-display area 12 has 3 rows and 3 columns of first light-emitting units 11. In this way, the first direction F1 includes the row direction X and the column direction Y, the second direction F2 includes two diagonal directions, the first light-emitting element 111 is a blue light-emitting element B, and the four blue light-emitting elements B with different peak wavelengths are B1, B2, B3, and B4 respectively.

[0156] In Figure 17 the manner shown, for any two adjacent first light-emitting units 11 in the first direction F1, the first light-emitting element 111 in one first light-emitting unit 11 is one of B1, B2, B3, and B4, and the first light-emitting element 111 in the other first light-emitting unit 11 is another one of B1, B2, B3, and B4, that is, D 1is the difference in the peak wavelengths between any two of B1, B2, B3, and B4. Since the peak wavelengths of B1, B2, and B3 are not equal to each other, D 1 is greater than 0. Some of the first light-emitting units 11 have first light-emitting elements 111 with the same emission color as the first light-emitting units 11 adjacent in the second direction F2. As Figure 17 shown, in the second direction F2, there are multiple pairs of adjacent B1, multiple pairs of adjacent B2, multiple pairs of adjacent B3, and multiple pairs of adjacent B4. For a pair of adjacent B1, a pair of adjacent B2, a pair of adjacent B3, and a pair of adjacent B4, the corresponding D 2 is all 0, so all satisfy D 1 > D 2 .

[0157] In an implementation manner of the embodiment of the present application, as Figure 17 shown, when c is greater than 3, in the same sub-display area 12, in the first direction F1, the peak wavelengths of three consecutive first light-emitting units 11 are not the same; in the same column of first light-emitting units 11, the first light-emitting units 11 with three different peak wavelengths are arranged alternately; in the same row of first light-emitting units 11, the first light-emitting units 11 with three different peak wavelengths are arranged alternately. In this way, in each row and each column, the first light-emitting units 11 with three different peak wavelengths are arranged alternately, which can reduce the compensation distance of multiple consecutive first light-emitting units 11 with different peak wavelengths in a row or a column, so as to improve the compensation display effect.

[0158] Optionally, the first difference is greater than 2 nm, and the second difference is not greater than 2 nm, that is, D 1 > 2 nm, D 2 ≤ 2 nm. In this way, the first light-emitting units 11 with a peak wavelength difference greater than 2 nm and the first light-emitting units 11 with a peak wavelength difference not greater than 2 nm can achieve display complementarity, and when there are first light-emitting elements 11 with multiple peak wavelengths in the display panel, the display uniformity is improved.

[0159] In an implementation manner of the embodiment of the present application, the second difference is not greater than 1 nm, that is, D 2 ≤ 1 nm. In this way, the adjacent first light-emitting units 11 in the second direction F2 can have a smaller peak wavelength difference, which can better compensate for the peak wavelength difference between two adjacent first light-emitting units 11 in the first direction F1, so that the display panel has better display uniformity.

[0160] Optionally, the first light-emitting element 111 is a blue light-emitting element B. Taking the light-emitting elements in the display panel as Micro LEDs as an example, among the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B, when the main wavelength difference between two light-emitting elements of the same light-emitting color is not less than 1 nm, since the JNCD (Just Noticeable Color Difference) of the blue light-emitting element B is 1.9, the JNCD of the green light-emitting element G is 0.7, and the JNCD of the red light-emitting element R is 1.6. It can be seen that when the main wavelength difference is the same, the color difference between two blue light-emitting elements B is larger. In order to better improve the display uniformity of the display panel, the first light-emitting element 111 is set as the blue light-emitting element B.

[0161] Reference Figure 18 , Figure 18 FIG. is a schematic diagram of the layout of the first light-emitting element in another display panel provided by the embodiment of the present application. On the basis of any of the above embodiments, Figure 18 In the display panel shown, the display layer further includes a plurality of second light-emitting units 13 arranged in an array; the second light-emitting unit 13 includes at least one second light-emitting element 131, and the second light-emitting element 131 emits second-color light; the main wavelengths of the second light-emitting elements 131 in the same second light-emitting unit 13 satisfy a second preset condition; in two adjacent second light-emitting units 13 in the third direction F3, the main wavelengths of the second light-emitting elements 131 have a third difference D 3 ; the third direction F3 includes at least one of the row direction x and the column direction y of the array where the second light-emitting unit 13 is located; in two adjacent second light-emitting units 13 in the fourth direction F4, the main wavelengths of the second light-emitting elements 131 have a fourth difference D 4 ; the fourth direction F4 and the third direction F3 have an angle greater than 0° and less than 90°; where, |D 3 -D 4 |>0. This method can not only achieve the display complementary effect of the first light-emitting elements 111 with different main wavelengths, but also achieve the display complementary effect of the second light-emitting elements 131 with different main wavelengths, and can better improve the display uniformity of the display panel.

[0162] The plane where the first direction F1 and the second direction F2 intersect is coplanar with the plane where the third direction F3 and the fourth direction F4 intersect, and both are parallel to the plane where the display layer is located.

[0163] In the embodiment of the present application, there is at least one second light-emitting unit 13, and the main wavelengths between it and other second light-emitting units 13 in the third direction F3 have a third difference, and the main wavelengths between other second light-emitting units 13 in the fourth direction F4 have a fourth difference. In this way, display complementarity can be achieved through the second light-emitting units 13 with different main wavelength differences to improve the display uniformity.

[0164] The row direction X of the first light-emitting unit 11 and the row direction x of the second light-emitting unit 13 can be the same, and the column direction Y of the first light-emitting unit 11 and the column direction y of the second light-emitting unit 13 can be the same. For example, in the display layer, the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B can be arranged in a real arrangement. In the same row, the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B are alternately arranged, and the light-emitting colors of any three consecutive light-emitting elements are different from each other. The light-emitting colors of the light-emitting elements in the same column are the same.

[0165] The row direction X of the first light-emitting unit 11 and the row direction x of the second light-emitting unit 13 can be different, and the column direction Y of the first light-emitting unit 11 and the column direction y of the second light-emitting unit 13 can be different. For example, in the display layer, the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B can be arranged in a pentile arrangement, or a diamond arrangement, or a delta arrangement.

[0166] In the embodiments of the present application, the arrangement mode of the light-emitting elements can be set according to requirements, and the embodiments of the present application do not limit the arrangement mode of the light-emitting elements in the display layer.

[0167] In Figure 18 In the illustrated manner, taking the second light-emitting element 131 being a red light-emitting element R as an example for illustration. In the embodiments of the present application, it is not limited to the first light-emitting element 111 being a blue light-emitting element B and the second light-emitting element 131 being a red light-emitting element R. The first light-emitting element 111 can be any one of a red light-emitting element R, a green light-emitting element G, and a blue light-emitting element B, and the second light-emitting element 1311 can be another one of a red light-emitting element R, a green light-emitting element G, and a blue light-emitting element B.

[0168] In an implementation manner of the embodiments of the present application, the second preset condition is: the second light-emitting unit 13 includes one second light-emitting element 131; or, the second preset condition is: the second light-emitting unit 13 includes q second light-emitting elements 131, where q is a positive integer greater than 1, and the main wavelength difference between two second light-emitting elements 131 in the same second light-emitting unit 13 is not greater than a third threshold value, where D 3 >D 4 , and the third threshold value is less than or equal to D 4 .

[0169] Optionally, in the same second light-emitting unit 13, if there are multiple second light-emitting elements 131, for one second light-emitting element 131, the main wavelength difference between it and other second light-emitting elements 131 can be set to be the third threshold value.

[0170] If the second light-emitting unit 13 includes a second light-emitting element 131, in the second light-emitting element array, the difference in peak wavelength between two adjacent second light-emitting elements 131 in the third direction F3 is D 3 ; the difference in peak wavelength between two adjacent second light-emitting elements 131 in the fourth direction F4 is D 4 . By the unequal differences in peak wavelength, complementary display effects are achieved between two adjacent second light-emitting elements 131 in the third direction F3 and two adjacent second light-emitting elements 131 in the fourth direction F4, so as to reduce the display non-uniformity problem caused by display differences of the second light-emitting elements 131 in the display panel

[0171] If the second light-emitting unit 13 includes p second light-emitting elements 131, the second light-emitting element array is divided into multiple sub-arrays. Each sub-array serves as a second light-emitting unit 13 and includes q second light-emitting elements 131. The q second light-emitting elements 131 in the same second light-emitting unit 13 are arranged in e rows and f columns, q = e * f, where e and f are both positive integers and at least one of them is greater than 1. Since the third threshold is less than or equal to D 4 , the q second light-emitting elements 131 in the same second light-emitting unit 13 have the same or similar peak wavelengths, which is convenient for designing a scheme of complementary peak wavelengths between the q second light-emitting elements 131 in the second light-emitting unit 13 as a whole and the q second light-emitting elements 131 in other second light-emitting units 13

[0172] The arrangement manner of the second light-emitting unit 13 may refer to the arrangement manner of the first light-emitting unit 11 in the above embodiment, and the arrangement manner of the second light-emitting unit 13 will not be elaborated in the embodiments of the present application

[0173] Optionally, the first light-emitting element 111 is a blue light-emitting element B; the second light-emitting element 131 is a green light-emitting element G or a red light-emitting element R. Specifically, the second light-emitting element 131 may be a red light-emitting element R. As described above, at a unit peak wavelength difference (1 nm), the JNCD of the blue light-emitting element B, the red light-emitting element R, and the green light-emitting element G decreases in sequence. Setting the first light-emitting element 111 as the blue light-emitting element B and the second light-emitting element 131 as the red light-emitting element R can perform display compensation on two light-emitting elements with large color differences in the display panel, so as to better improve the display uniformity of the display panel

[0174] In the embodiments of the present application, the first difference is greater than the second difference, and the third difference is greater than the fourth difference, that is, D 1 >D 2 ,D 3 >D 4In this way, it is possible to achieve the complementarity of the difference in the corresponding peak wavelengths of adjacent first light-emitting units 11 in the first direction F1 and the difference in the corresponding peak wavelengths of adjacent first light-emitting units 11 in the second direction F2. It is also possible to achieve the complementarity of the difference in the corresponding peak wavelengths of adjacent second light-emitting units 13 in the third direction F3 and the difference in the corresponding peak wavelengths of adjacent second light-emitting units 13 in the fourth direction F4, so as to achieve the complementary display effects of the first light-emitting elements 111 with different peak wavelengths in the display panel and the complementary display effects of the second light-emitting units 13 with different peak wavelengths in the display panel, thereby improving the overall display uniformity of the display panel.

[0175] Reference Figure 19 , Figure 19 FIG. is a schematic diagram of another layout method of the first light-emitting element in the display panel provided by the embodiment of the present application. On the basis of any of the above embodiments, Figure 19 In the display panel shown, the display layer has c first light-emitting elements 111 with different peak wavelengths, and has c second light-emitting elements 131 with different peak wavelengths, where c is a positive integer greater than 1; Figure 19 In, taking c = 2 as an example for illustration, the display panel has two first light-emitting elements 111 with different peak wavelengths, and the display panel has two second light-emitting elements 131 with different peak wavelengths. Taking the first light-emitting element 111 as a blue light-emitting element B, the two first light-emitting elements 111 with different peak wavelengths are B1 and B2 respectively. Taking the second light-emitting element 131 as a green light-emitting element G, the two second light-emitting elements 131 with different peak wavelengths are G1 and G2 respectively.

[0176] The display layer includes a plurality of pixel units 14, and each pixel unit 14 includes a first light-emitting element 111 with one peak wavelength and a second light-emitting element 131 with one peak wavelength; Figure 19 In, taking the actual arrangement of the light-emitting elements of three different light-emitting colors in the display panel as an example for illustration, at this time, the array row directions of the light-emitting elements of the three different colors are the same, and the array column directions are the same. Each pixel unit 114 includes three light-emitting elements of different colors, namely a red light-emitting element R, a green light-emitting element G, and a blue light-emitting element B arranged in sequence along the array row direction.

[0177] Such as Figure 19As shown, a plurality of pixel units 14 in the display layer include a first pixel unit 141 and a second pixel unit 142. The main wavelength of the first light-emitting element 111 in the first pixel unit 141 is greater than the main wavelength of the first light-emitting element 111 in the second pixel unit 142, and the main wavelength of the second light-emitting element 131 in the first pixel unit 141 is greater than the main wavelength of the second light-emitting element 131 in the second pixel unit 142. It is set that the main wavelength of B1 is greater than that of B2, and the main wavelength of G1 is greater than that of G2. Then, for any pixel unit 14, if its first light-emitting element 111 is B1, the second light-emitting element 131 is G1; if its first light-emitting element 111 is B2, the second light-emitting element 131 is G2. This way can make the main wavelengths of the first light-emitting element 111 and the second light-emitting element 131 in the pixel unit 14 be positively correlated, can make the first light-emitting element 111 with a relatively large main wavelength and the second light-emitting element 131 with a relatively large main wavelength form the first pixel unit 141, make the first light-emitting element 111 with a relatively small main wavelength and the second light-emitting element 131 with a relatively small main wavelength form the second pixel unit 142, can make the main wavelengths of the first light-emitting element 111 and the second light-emitting element 131 in the pixel unit 14 match, can reduce the color shift of the display panel, and improve the image display quality.

[0178] It is set that the main wavelengths of c first light-emitting elements 111 with different main wavelengths are λ B1 to λ Bc in sequence, and λ B1 to λ Bc increase in sequence. The main wavelengths of c second light-emitting elements 131 with different main wavelengths are λ G1 to λ Gc in sequence, and λ G1 to λ Gc increase in sequence. The display layer includes a first pixel unit 141 to a c-th pixel unit 14c. For a positive integer t not greater than c, in the t-th pixel unit 14t, the main wavelength of the first light-emitting element 111 is λ Bt , and the main wavelength of the second light-emitting element 131 is λ Gt . Taking the first light-emitting element 111 as a blue light-emitting element B and the second light-emitting element 131 as a green light-emitting element G as an example, the c first light-emitting elements 111 with different main wavelengths are B1 to Bc in sequence, and the main wavelengths of B1 to Bc increase in sequence. The c second light-emitting elements 131 with different main wavelengths are G1 to Gc in sequence, and the main wavelengths of G1 to Gc increase in sequence. Then, in the t-th pixel unit 14t, the first light-emitting element 111 is Bt, and the second light-emitting element 131 is Gt.

[0179] Reference Figure 20 , Figure 20 is a sectional view of a display panel provided by an embodiment of the present application. On the basis of the above implementation manner, asFigure 20 As shown, the first light-emitting element 111 is connected to the pixel circuit 15, and the pixel circuit 15 is used to control the connected first light-emitting element 111 for image display; the display layer includes c first light-emitting elements 111 with different main wavelengths, where c is a positive integer greater than 1; when displaying the same gray level, among the c first light-emitting elements 111 with different main wavelengths, at least two pixel circuits 15 provide different data voltages. Figure 20 In this case, the fifth direction Z is perpendicular to the plane where the display layer is located. In this way, when the first light-emitting elements 111 with different main wavelengths display the same gray level, they emit light based on different data voltages, and the display differences caused by the main wavelength differences can be compensated by the different data voltages, further improving the display uniformity.

[0180] The display panel has a substrate 16, and a TFT array is formed on the surface of the substrate 16 to form the pixel circuit 15. The first light-emitting element 111 is welded and fixed on the surface of the thin-film transistor (TFT) array. Figure 20 In this figure, for the sake of clear illustration, only one first light-emitting element 111 and one TFT in the pixel circuit 15 connected thereto are shown. In order to avoid display crosstalk between different light-emitting elements, a black glue layer 17 surrounding the side wall of the light-emitting element is provided on the surface of the TFT array.

[0181] Based on the display panel provided in the above embodiment, another embodiment of the present application further provides an electronic device, and the electronic device can be as Figure 21 shown.

[0182] Refer to Figure 21 , Figure 21 which is a schematic structural diagram of an electronic device provided by an embodiment of the present application. The shown electronic device includes a display panel 18, and the display panel 18 can be the display panel provided by any one of the above embodiments.

[0183] Optionally, the electronic device includes but is not limited to mobile phones, tablet computers, laptop computers, smart wearable devices, AR devices, and VR devices, etc.

[0184] In the embodiment of the present application, the electronic device includes the display panel provided in the above embodiment. For light-emitting elements of the same emission color, display complementarity can be achieved through light-emitting elements with different main wavelengths, so as to improve the display uniformity and the image display quality.

[0185] Taking the preparation method of the Micro LED display panel as an example, in the conventional preparation method, for Micro LEDs of the same emission color, generally two transfer processes are required to complete the welding and bonding of the Micro LEDs on the array substrate. Taking blue Micro LEDs as an example, the conventional preparation method includes:

[0186] First, a plurality of blue Micro LEDs are fabricated on a wafer (such as a sapphire substrate).

[0187] Then, through a first transfer process, the blue Micro LEDs on the wafer are integrally transferred onto a first carrier plate.

[0188] Furthermore, through a second transfer process, according to the arrangement pattern of light-emitting elements of each color in the display panel, the blue Micro LEDs on the first carrier substrate are transferred onto a second carrier substrate. Then, the light-emitting elements of each color on the second carrier substrate are transferred onto the array substrate in multiple times and welded and fixed to the pads on the array substrate to achieve electrical connection with the corresponding pixel circuits.

[0189] During the second transfer process, the blue Micro LEDs on the carrier substrate are transferred in blocks, and multiple blue Micro LEDs in the same block are transferred onto the array substrate synchronously.

[0190] Due to the differences in the film layer components and thicknesses of the blue Micro LEDs in different regions of the wafer during the fabrication process, there are differences in the peak wavelengths of the blue Micro LEDs in different regions of the wafer. All the blue Micro LEDs on the wafer are integrally transferred onto the carrier plate during the first transfer process, without changing the arrangement pattern of the blue Micro LEDs relative to the wafer. Due to the differences in the peak wavelengths of the blue Micro LEDs in different regions of the wafer, correspondingly, there may be a large jump in the peak wavelengths of the blue Micro LEDs at the boundary positions between blocks during the second transfer, which may cause display non-uniformity problems at the boundary positions between blocks in the display panel. For example Figure 1 as shown, when the display panel displays a monochromatic blue screen, there are stripes at the boundary positions between blocks.

[0191] To solve the display non-uniformity problem of the display panel caused by the conventional fabrication method, an embodiment of the present application provides a method for fabricating a display panel, which is used to fabricate the display panel provided in any one of the above embodiments. The fabrication method can be as Figure 22 shown.

[0192] Referring to Figure 22 , Figure 22 which is a schematic flowchart of a method for fabricating a display panel provided by an embodiment of the present application. The fabrication method includes:

[0193] Step S11: Fabricate a first device wafer, where the first device wafer includes a plurality of first light-emitting elements that emit light of a first color.

[0194] Step S12: Test the first device wafer to obtain the wavelength distribution of the first light-emitting elements in the first device wafer. The first device wafer includes a plurality of test areas, and each test area includes at least one first light-emitting element; determine the wavelength distribution based on the dominant wavelength of the test area.

[0195] Step S13: Determine a wafer complementary group, where the wafer complementary group includes c first device wafers with complementary wavelength distributions.

[0196] Step S14: Solder and fix a plurality of first light-emitting elements arranged in an array on the array substrate, and the first light-emitting elements soldered and fixed on the array substrate are from the same wafer complementary group.

[0197] Wherein, the array substrate has a plurality of first light-emitting units arranged in an array; each first light-emitting unit includes at least one first light-emitting element; the dominant wavelengths of the first light-emitting elements in the same first light-emitting unit satisfy a first preset condition; among two adjacent first light-emitting units in the first direction, the dominant wavelengths of the first light-emitting elements have a first difference D 1 ; the first direction includes at least one of the row direction and the column direction of the array where the first light-emitting units are located; among adjacent first light-emitting units in the second direction, the dominant wavelengths of the first light-emitting elements have a second difference D 2 ; the second direction has an angle greater than 0° and less than 90° with the first direction; |D 1 -D 2 | > 0.

[0198] In the conventional preparation method, generally, the first light-emitting elements are directly transferred to the display panel based on their arrangement on the wafer, which may cause the above-mentioned stripe problems between blocks. In the embodiments of the present application, a wafer complementary group can be determined based on the wavelength distribution of the first device wafer. The c first device wafers with complementary wavelength distributions in the wafer complementary group can respectively provide first light-emitting elements of one dominant wavelength, so that the first light-emitting units composed of the first light-emitting elements of c dominant wavelengths satisfy |D 1 -D 2 | > 0. In this way, display complementarity can be achieved through the first light-emitting units 11 with different dominant wavelength differences to improve display uniformity.

[0199] Reference Figure 23 , Figure 23 is a schematic flowchart of a method for testing a first device wafer provided by an embodiment of the present application. The method for testing the first device wafer includes:

[0200] Step S21: Divide the rectangular effective area of the first device wafer into M rows and N columns of test areas, where both M and N are positive integers greater than 1.

[0201] Due to the edge effect at the edge position of the wafer, there may be relatively large quality defects in the first light-emitting elements. Therefore, during the preparation of the display panel, generally, the first light-emitting elements in the edge region are not used, but the first light-emitting elements within a preset rectangular effective region are used for the preparation of the display panel.

[0202] Step S22: Test the peak wavelength of the test areas respectively to determine the wavelength distribution of the first light-emitting elements in the first device wafer.

[0203] The first device wafer can be tested by a photoluminescence (PL) test device and / or an electroluminescence (EL) test device. Based on the test results, the peak wavelength data of different test areas in the first device wafer can be obtained, and thus the wavelength distribution of the first light-emitting elements in the first device wafer can be acquired.

[0204] In Figure 23 the shown manner, dividing the first device wafer into multiple test areas for testing the peak wavelength of the first light-emitting elements can reduce the number of tests and test data.

[0205] Refer to Figure 24 , Figure 24 which is a schematic diagram of the peak wavelength distribution of a first device wafer provided by an embodiment of the present application. In this manner, taking c = 2 as an example, the wafer complementary group has two first device wafers with complementary peak wavelength distributions. In this manner, within the rectangular effective region of the first device wafer, along the connection direction from the upper left corner to the lower right corner, the test data of the left first device wafer show that the peak wavelength decreases sequentially, and the test data of the right first device wafer show that the peak wavelength increases sequentially.

[0206] Refer to Figure 25 , Figure 25 which is another schematic diagram of the peak wavelength distribution of a first device wafer provided by an embodiment of the present application. In this manner, taking c = 2 as an example, the wafer complementary group has two first device wafers with complementary peak wavelength distributions. In this manner, within the rectangular effective region of the first device wafer, along the direction from the upper side to the lower side, the test data of the left first device wafer show that the peak wavelength decreases sequentially, and the test data of the right first device wafer show that the peak wavelength increases sequentially.

[0207] Refer to Figure 26 , Figure 26 which is yet another schematic diagram of the peak wavelength distribution of a first device wafer provided by an embodiment of the present application. In this manner, taking c = 2 as an example, the wafer complementary group has two first device wafers with complementary peak wavelength distributions. In this manner, within the rectangular effective region of the first device wafer, along the direction from the left side to the right side, the test data of the left first device wafer show that the peak wavelength decreases sequentially, and the test data of the right first device wafer show that the peak wavelength increases sequentially.

[0208] Refer toFigure 27 , Figure 27 It is another schematic diagram of the main wavelength distribution of the first device wafer provided by the embodiment of the present application. In this method, taking c = 2 as an example, the wafer complementary group has two first device wafers with complementary main wavelength distributions. In this method, the test data of the first device wafer on the left shows that the main wavelength is generally larger, and the test data of the first device wafer on the right shows that the main wavelength is generally smaller.

[0209] Among them, the main wavelength of the first device wafer can be determined from the electroluminescence or photoluminescence test data of its test area.

[0210] In Figures 24 - 27 any method, for two first device wafers in the same wafer complementary group, if a block of one first device wafer has a smaller main wavelength, then the block at the same position of the other first device wafer has a larger main wavelength. In the same block, the two first device wafers can respectively provide a first light-emitting element of one main wavelength. Arranging the first light-emitting elements of these two main wavelengths according to the distribution method in the display panel embodiment can achieve the display complementarity of their main wavelengths. Since the human eye recognition accuracy is not sufficient to recognize the color of a single first light-emitting element, only the display effect after the complementarity of the first light-emitting elements of the two main wavelengths can be recognized. Therefore, the display uniformity can be improved within the human eye recognition range. If c = 2, as Figure 3 shown, in the embodiment of the present application, a first light-emitting element of one main wavelength can be respectively provided based on two first device wafers in the same wafer complementary group. Taking the first light-emitting element as a blue light-emitting element B as an example, the two first device wafers respectively provide a blue light-emitting element B of one wavelength. For example, a blue light-emitting element B1 provided by one first device wafer and a blue light-emitting element B2 provided by the other first device wafer, B1 and B2 have different main wavelengths. In the embodiment of the present application, based on Figure 3 the shown method, two blue light-emitting elements B are arranged in the display panel, so that at least part of the display area of the display panel includes Figure 3 the first light-emitting elements arranged in the shown arrangement.

[0211] Since B1 and B2 are respectively sourced from different first device wafers, their main wavelengths are complementary, their main wavelengths are different, and the sum of their main wavelengths is a constant. In the second transfer process, the sum of the main wavelengths of the two first device wafers with complementary main wavelengths in each block is the same constant. Taking Figure 24 as an example, in the Figure 24 block shown by the dashed box, the main wavelengths of the two first device wafers are one larger and the other smaller, and the sum of their main wavelengths is a constant; in Figure 24In the block indicated by the center dash-dotted rectangle, the peak wavelengths of the two first device wafers are such that one is larger and the other is smaller, and the sum of their peak wavelengths is a constant; and the sum of the peak wavelengths of the two first device wafers in the block indicated by the dotted rectangle is the same constant as the sum of the peak wavelengths in the block indicated by the center dash-dotted rectangle.

[0212] During the process of transferring the first light-emitting elements onto the array substrate, as Figure 3 shown, among the nine first light-emitting elements arranged in a 3-row and 3-column layout, if the first light-emitting element in the central region is B2, then the first light-emitting elements adjacent to it in the row direction X and the column direction Y can be made all B1, and the first light-emitting elements adjacent to it on the diagonal can be made all B2. In this way, the central region B2 has a relatively large peak wavelength difference from the four first light-emitting elements adjacent to it in the first direction F1 (the row direction X and the column direction Y), and this peak wavelength difference is the peak wavelength difference between B1 and B2. The central region B2 has a relatively small peak wavelength difference from the four first light-emitting elements adjacent to it in the second direction F2 (the two diagonal directions), and this peak wavelength difference is the peak wavelength difference between the two Bs. As described above, the peak wavelength differences between these nine first light-emitting elements can be set to satisfy S 1 ≥2S 2 , so as to achieve the complementarity of the display effects of the first light-emitting elements with two different peak wavelengths in the display panel, and reduce the problem of display unevenness caused by display differences in the first light-emitting elements in the display panel.

[0213] Refer to Figure 28 , Figure 28 , which is a schematic flowchart of a method for determining a wafer complementary group provided by an embodiment of the present application. In the same device wafer, M rows and N columns of test areas are set as the first test area to the Pth test area in sequence, and P = M * N; as Figure 28 shown, the method for determining the wafer complementary group includes:

[0214] Step S31: Calculate the average peak wavelength H of the kth test area in c first device wafers k , where k is a positive integer not greater than P.

[0215] Step S32: Corresponding to the M rows and N columns of test areas, form an M-row and N-column peak wavelength matrix with the H of the first test area 1 to the H of the Pth test area P .

[0216] Step S33: Calculate the range and standard deviation of the peak wavelength matrix.

[0217] Step S34: If the range does not exceed the first calibration value and the standard deviation does not exceed the second calibration value, then the wavelength distributions of the c first device wafers are complementary and belong to the same wafer complementary group. Conversely, if the range exceeds the first calibration value and / or the standard deviation exceeds the second calibration value, then the wavelength distributions of the c first device wafers are not complementary and do not belong to the same wafer complementary group.

[0218] In Figure 28 the shown manner, based on the comparison results of the range and standard deviation of the main wavelength matrix constructed from the average main wavelengths of each test area with the corresponding calibration values, it can be determined whether the main wavelength distributions of multiple first device wafers are complementary, it can be determined whether the c first device wafers belong to the same wafer complementary group, and it can be judged whether the c first device wafers belong to the same wafer complementary group through the corresponding mathematical calculation method. After the main wavelength test of the first device wafers is completed, the determination and grouping of the wafer complementary group can be automatically performed by software.

[0219] The specific values of the two calibration values can be set according to the accuracy requirements of display compensation. The smaller the calibration value, the better the display compensation effect of the first light-emitting elements with different main wavelengths in the display panel, and the better the display uniformity of the display panel. Optionally, the first calibration value is not greater than 4 nm, and the second calibration value is not greater than 0.6 nm. When this value range is satisfied, the wafer complementary group determined based on the first calibration value and the second calibration value can better achieve the display compensation of the first light-emitting elements with different main wavelengths in the display panel.

[0220] Refer to Figure 29 , Figure 29 which is a schematic diagram of the calculation principle for determining the wafer complementary group provided by an embodiment of the present application. Figure 29 In the left figure C1 and the middle figure C2 in Figure 29 respectively represent the main wavelength distributions of 9 rows and 9 columns of test areas in a first device wafer. Each square represents a test area, and the data in the square is the main wavelength value (unit: nm).

[0221] Refer to Figure 30 , Figure 30 which is a schematic diagram of the calculation principle for determining the wafer complementary group provided by an embodiment of the present application. Figure 30 In the left figure C3 and the middle figure C4 in Figure 30The right figure in shows the main wavelength matrix formed based on the average values of the main wavelengths of each test area of the two first device wafers. In this method, the range is 8 and the standard deviation is 1.8. Therefore, when c = 2, the main wavelength distributions of these two first device wafers are not complementary.

[0222] In an implementation manner of the embodiment of the present application, the manufacturing method further includes: welding and fixing the second light-emitting elements arranged in an array on the array substrate based on the wafer complementary group of the second device wafer; at this time, the arrangement manners of the first light-emitting elements and the second light-emitting elements in the display panel can be as Figure 31 shown.

[0223] Refer to Figure 31 , Figure 31 which is a schematic diagram of another layout manner of the first light-emitting elements in the display panel provided by the embodiment of the present application. On the basis of the above implementation manner, Figure 31 the display panel shown in is illustrated by taking c = 2 as an example. The display panel includes a plurality of pixel units 14, and each pixel unit 14 includes a first light-emitting element 111 with one main wavelength and a second light-emitting element 131 with one main wavelength; the plurality of pixel units 14 include a first pixel unit 141 and a second pixel unit 142. The main wavelength of the first light-emitting element 111 in the first pixel unit 141 is greater than that of the first light-emitting element 111 in the second pixel unit 142, and the main wavelength of the second light-emitting element 131 in the first pixel unit 141 is greater than that of the second light-emitting element 131 in the second pixel unit 142. This method can further enable the second light-emitting elements 131 with different main wavelengths in the display panel to achieve display complementarity, so as to better improve the display uniformity of the display panel. Among them, the method for determining the wafer complementary group of the second device wafer is the same as that of the first device wafer, and the embodiments of the present application will not elaborate on this.

[0224] In Figure 31 , taking the first light-emitting element 111 as a blue light-emitting element B and the second light-emitting element 131 as a red light-emitting element R as an example, the two first light-emitting elements 111 with different main wavelengths are B1 and B2 respectively, and the two second light-emitting elements 131 with different main wavelengths are R1 and R2 respectively. It can be set that the main wavelength of B1 is less than that of B2, and the main wavelength of R1 is less than that of R2.

[0225] For a non-edge B1, the four adjacent first light-emitting elements 111 in its row and column directions are all B2, and the four adjacent first light-emitting elements 111 in its diagonal directions are all B1. For a non-edge B2, the four adjacent first light-emitting elements 111 in its row and column directions are all B1, and the four adjacent first light-emitting elements 111 in its diagonal directions are all B2.

[0226] For a non-edge R1, the four adjacent first light-emitting elements 111 in the row and column directions are all R2, and the four adjacent first light-emitting elements 111 in the diagonal directions are all R1. For a non-edge R2, the four adjacent first light-emitting elements 111 in the row and column directions are all R1, and the four adjacent first light-emitting elements 111 in the diagonal directions are all R2.

[0227] Reference Figure 32 , Figure 32 is a schematic diagram of the layout of the first light-emitting elements in another display panel provided by the embodiment of the present application. On the basis of the Figure 31 shown method, Figure 32 in the shown display panel, a third light-emitting unit 19 is further included. The third light-emitting unit 19 includes at least one third light-emitting element 191 for emitting third-color light. Figure 32 In

[0228] it is illustrated by taking each light-emitting unit including one light-emitting element as an example. At this time, the manufacturing method further includes; based on the wafer complementary group of the third device wafer, welding and fixing the third light-emitting elements 191 arranged in an array on the array substrate.

[0229] As Figure 32 shown, the pixel unit 14 further includes a third light-emitting element 191 of a main wavelength. The main wavelength of the third light-emitting element 191 in the first pixel unit 141 is greater than the main wavelength of the third light-emitting element 191 in the second pixel unit 142. This method can further enable the third light-emitting elements 191 with different main wavelengths in the display panel to achieve display complementarity, so as to better improve the display uniformity of the display panel.

[0230] Taking the third light-emitting element 191 as a green light-emitting element G as an example, the third light-emitting elements 191 of two main wavelengths are G1 and G2 respectively. It can be set that the main wavelength of G1 is less than the main wavelength of G2. For a non-edge G1, the four adjacent third light-emitting elements 191 in the row and column directions are all G2, and the four adjacent third light-emitting elements 191 in the diagonal directions are all G1. For a non-edge G2, the four adjacent third light-emitting elements 191 in the row and column directions are all G1, and the four adjacent third light-emitting elements 191 in the diagonal directions are all G2. When using the technical solution of the embodiment of the present application to perform display complementarity on the first light-emitting elements 111 with different main wavelengths, it can perform display complementarity on the first light-emitting elements 111 in some display areas of the display panel, or perform display complementarity on the first light-emitting elements 111 in the entire display area.

[0231] When the technical solution of the embodiment of the present application is adopted to perform display complementarity on the second light-emitting elements 131 with different main wavelengths, it can be performed on the second light-emitting elements 131 in some display areas of the display panel, or on the second light-emitting elements 131 in the entire display area.

[0232] When the technical solution of the embodiment of the present application is adopted to perform display complementarity on the third light-emitting elements 191 with different main wavelengths, it can be performed on the third light-emitting elements 191 in some display areas of the display panel, or on the third light-emitting elements 191 in the entire display area.

[0233] The transfer principle of the first light-emitting element will be further described below with reference to the accompanying drawings.

[0234] Reference Figures 33 - 38 , Figures 33 - 38 is a schematic diagram of the transfer principle of a first light-emitting element provided by an embodiment of the present application. In the method for manufacturing a display panel, the transfer method of the first light-emitting element includes:

[0235] First, as Figure 33 shown, after the first device wafer 20 including the first light-emitting element is fabricated, the entire batch of first device wafers 20 can be fully inspected by a PL test device to determine the main wavelength distribution of each first device wafer 20. In this step, at least the rectangular effective area 21 is tested to obtain the main wavelength distribution of the rectangular effective area 21 in each first device wafer 20.

[0236] Then, as Figure 34 shown, they can be automatically grouped by image processing software in a computer to determine two first device wafers 20 with complementary main wavelength distributions.

[0237] Again, as Figure 25 shown, the first transfer is performed, and the rectangular effective areas 21 in two first device wafers 20 are respectively transferred as a whole to the first carrier plate.

[0238] It is assumed that each first device wafer 20 has four blocks, which are the first block to the fourth block in sequence. Each block has a plurality of first light-emitting elements. For the two first device wafers 20 in the wafer complementary group, the first light-emitting elements corresponding to the four blocks in one first device wafer 20 are U1, U2, U3, and U4 in sequence, and the first light-emitting elements corresponding to the four blocks in the other first device wafer 20 are V1, V2, V3, and V4 in sequence. U1 and V1 correspond to the first block, U2 and V2 correspond to the second block, U3 and V3 correspond to the third block, and U4 and V4 correspond to the fourth block.

[0239] Again, as Figure 36As shown, a second transfer is performed. According to the arrangement of light-emitting elements of various colors in the display panel, the first light-emitting elements on the first carrier substrate are transferred to the second carrier substrate. During this transfer process, the first light-emitting elements corresponding to the same block in the two first device wafers are transferred to the second carrier substrate based on the layout methods of the two first light-emitting elements with different peak wavelengths described above. For example, in block g, Ug and Vg with different peak wavelengths are transferred to the same second carrier substrate based on the layout methods of the two first light-emitting elements with different peak wavelengths described above, and the first light-emitting elements in different blocks are transferred to different second carrier substrates. As Figure 36 shown, the first block to the fourth block respectively correspond to a second carrier plate, and there are a total of four second carrier plates. Among them, g is a positive integer not greater than 4.

[0240] Taking the second carrier plate to which U1 and V1 are transferred as an example, as Figure 37 shown, the second carrier plate can form a plurality of blocks including U1 and V1 on the second carrier plate based on the two first light-emitting elements with different peak wavelengths of U1 and V1. Figure 37 Each rectangular box in represents a block. The blocks in the second carrier plate are not limited to Figure 37 the 3-row and 3-column manner shown, and can be adjusted according to the design parameters of the display panel. In the second carrier plate, each block is formed by arranging U1 and V1. For example, corresponding to the Figure 3 way shown, one of U1 and V1 can be set as B1 and the other as B2.

[0241] Finally, as Figure 38 shown, the light-emitting elements in each block in 37 are transferred to the array substrate in multiple times. The light-emitting elements in the same block can be transferred differently. Figure 38 In, each rectangular box can represent a first light-emitting element.

[0242] In the embodiment of the present application, the peak wavelength of the light-emitting element can be directly measured by a photometer, and the chromometer can directly test and output the peak wavelength.

[0243] Figure 39 This is a schematic diagram of the calculation principle of the peak wavelength of the light-emitting element provided by the embodiment of the present application. For a given light-emitting element, the color coordinates of its emitted light in the CI3 1931 chromaticity diagram are determined, and the wavelength corresponding to the intersection point of the connection line from the color coordinates of the standard white light W to this color coordinate and the boundary of the chromaticity diagram is the peak wavelength of the light-emitting element.

[0244] As Figure 39As shown, if the color coordinate of the light emitted by a light-emitting element is at point Q1, then the wavelength 565 nm corresponding to the intersection point of the line connecting W and Q1 with the boundary of the chromaticity diagram is the dominant wavelength of the light-emitting element; if the color coordinate of the light emitted by a light-emitting element is at point Q2, then the wavelength 465 nm corresponding to the intersection point of the line connecting W and Q2 with the boundary of the chromaticity diagram is the dominant wavelength of the light-emitting element.

[0245] In the description of the present application, the various embodiments are described in a progressive, or parallel, or a combination of progressive and parallel manners. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other. The embodiments provided by the embodiments of the present application can be combined with each other without contradiction.

[0246] It should be noted that in the description of the present application, it should be understood that the descriptions of the drawings and embodiments are illustrative rather than restrictive. The same reference numerals throughout the embodiments of the specification identify the same structures. Additionally, for the sake of understanding and ease of description, the drawings may exaggerate the thickness of some layers, films, panels, regions, etc. At the same time, it can be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element can be directly on the other element or there may be intermediate elements. Additionally, "on..." means positioning the element on or below another element, but essentially does not mean positioning on the upper side of another element according to the direction of gravity.

[0247] The orientation or positional relationship indicated by terms such as "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be intermediate components present at the same time.

[0248] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that an article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the presence of additional identical elements in the article or device including the above elements.

[0249] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: include: A display layer, the display layer comprising a plurality of first light-emitting units arranged in an array; The first light-emitting unit includes at least one first light-emitting element, and the first light-emitting element emits a first color light; The main wavelength of the first light-emitting element in the same first light-emitting unit meets a first preset condition; In two adjacent first light-emitting units in a first direction, the main wavelengths of the first light-emitting elements have a first difference D1; the first direction includes at least one of a row direction and a column direction of an array where the first light-emitting units are located; In two adjacent first light-emitting units in the second direction, the main wavelengths of the first light-emitting elements have a second difference D2; the second direction and the first direction have an angle greater than 0° and less than 90°; Among them, |D1-D2|>0.

2. The display panel according to claim 1, characterized in that: The first preset condition is: the first light-emitting unit includes one first light-emitting element; Or, the first preset condition is: the first light-emitting unit includes p first light-emitting elements, p is a positive integer greater than 1, and the main wavelength difference between two first light-emitting elements in the same first light-emitting unit is not greater than a first threshold, wherein D1>D2, and the first threshold is less than or equal to D2.

3. The display panel according to claim 1, characterized in that: In the array where the first light emitting unit is located, In the row direction, the first light-emitting units having a first main wavelength and the first light-emitting units having a second main wavelength are arranged alternately; In the column direction, the first light-emitting units having a first main wavelength and the first light-emitting units having a second main wavelength are arranged alternately; The difference between the first main wavelength and the second main wavelength is not less than a second threshold, wherein D1>D2, and the second threshold is greater than or equal to D1.

4. The display panel according to claim 3, characterized in that: D1>D2.

5. The display panel according to claim 3, characterized in that: The first light-emitting unit includes a first main light-emitting unit, the sum of the absolute values ​​of the main wavelength differences between the first main light-emitting unit and four adjacent first light-emitting units in the first direction is a first sum value, and the sum of the absolute values ​​of the main wavelength differences between the first main light-emitting unit and four adjacent first light-emitting units in the second direction is a second sum value; Wherein, the first sum value is greater than or less than twice the second sum value.

6. The display panel according to claim 3, characterized in that: The first light emitting unit has m rows and n columns. Cloth the first light emitting element; Wherein, m and n are both positive integers not greater than 2.

7. The display panel according to claim 1, characterized in that: The display layer comprises c first light-emitting units with different main wavelengths, where c is a positive integer greater than 1; The display layer is divided into a plurality of sub-display areas arranged in an array; in the same sub-display area, the number of the first light-emitting units is not less than c, and the main wavelengths of at least c first light-emitting units are different from each other.

8. The display panel according to claim 7, characterized in that: In the first direction, the main wavelengths of two adjacent first light-emitting units both have the first difference.

9. The display panel according to claim 8, characterized in that: The first light-emitting unit comprises the first light-emitting elements arranged in m rows and n columns, where m and n are both positive integers; When c=2, m=n=1, or at least one of m and n is greater than 1.

10. The display panel according to claim 8, characterized in that: The first light-emitting unit comprises the first light-emitting elements arranged in m rows and n columns, where m and n are both positive integers; When c is greater than 2, m=n=1.

11. The display panel according to claim 10, characterized in that: In the same sub-display area, in the first direction, main wavelengths of consecutive c first light-emitting units are different from each other.

12. The display panel according to claim 10, characterized in that: In the same sub-display area, in the first direction, the dominant wavelengths of two adjacent first light-emitting units have the first difference, and in the second direction, the dominant wavelengths of two adjacent first light-emitting units have the second difference; in, In the same row of the first light-emitting units, the first light-emitting units with two different main wavelengths are arranged alternately in sequence; in the same column of the first light-emitting units, the first light-emitting units with two different main wavelengths are arranged alternately in sequence; Or, in one of the row direction and the column direction, the first light-emitting units with two different main wavelengths are arranged alternately in sequence; in the other of the row direction and the column direction, the main wavelengths of consecutive c first light-emitting units are different.

13. The display panel according to claim 10, characterized in that: When c>3, in the same sub-display area, in the first direction, the main wavelengths of at most three consecutive first light-emitting units are different from each other; in the same column of the first light-emitting units, three first light-emitting units with different main wavelengths are alternately arranged; in the same row of the first light-emitting units, three first light-emitting units with different main wavelengths are alternately arranged.

14. The display panel according to claim 1, characterized in that: The first difference is greater than 2 nm, and the second difference is not greater than 2 nm.

15. The display panel according to claim 14, characterized in that: The second difference is no greater than 1 nm.

16. The display panel according to claim 1, characterized in that: The first light emitting element is a blue light emitting element.

17. The display panel according to claim 1, characterized in that: The display layer further comprises a plurality of second light emitting units arranged in an array; the second light emitting unit comprises at least one second light emitting element, and the second light emitting element emits a second color light; The main wavelength of the second light-emitting element in the same second light-emitting unit meets a second preset condition; In two adjacent second light-emitting units in a third direction, the main wavelengths of the second light-emitting elements have a third difference D3; the third direction includes at least one of a row direction and a column direction of the array where the second light-emitting units are located; In two adjacent second light-emitting units in a fourth direction, the main wavelengths of the second light-emitting elements have a fourth difference D4; the fourth direction and the third direction have an angle greater than 0° and less than 90°; Among them, |D3-D4|>0.

18. The display panel according to claim 17, characterized in that: The second preset condition is: the second light-emitting unit includes one second light-emitting element; Or, the second preset condition is: the second light-emitting unit includes q second light-emitting elements, q is a positive integer greater than 1, and the main wavelength difference between two second light-emitting elements in the same second light-emitting unit is not greater than a third threshold, wherein D3>D4, and the third threshold is less than or equal to D4.

19. The display panel according to claim 17, characterized in that: The first light emitting element is a blue light emitting element; The second light emitting element is a green light emitting element or a red light emitting element.

20. The display panel according to claim 17, characterized in that: The first difference is greater than the second difference, and the third difference is greater than the fourth difference; The display layer comprises c kinds of the first light-emitting elements with different dominant wavelengths, and c kinds of the second light-emitting elements with different dominant wavelengths, where c is a positive integer greater than 1; The display layer includes a plurality of pixel units, and the pixel units include the first light-emitting element with a main wavelength and the second light-emitting element with a main wavelength; the plurality of pixel units include a first pixel unit and a second pixel unit, the main wavelength of the first light-emitting element in the first pixel unit is greater than the main wavelength of the first light-emitting element in the second pixel unit, and the main wavelength of the second light-emitting element in the first pixel unit is greater than the main wavelength of the second light-emitting element in the second pixel unit.

21. The display panel according to claim 1, characterized in that: The first light emitting element is connected to a pixel circuit, and the pixel circuit is used to control the connected first light emitting element to display an image; The display layer includes c first light-emitting elements with different main wavelengths, where c is a positive integer greater than 1; If the same gray scale is displayed, among the c types of the first light-emitting elements with different main wavelengths, the pixel circuits of at least two types provide different data voltages.

22. An electronic device, characterized in that: Comprising a display panel as described in any one of claims 1-21.

23. A method for preparing a display panel according to any one of claims 1 to 21, characterized in that: include: preparing a first device wafer, wherein the first device wafer includes a plurality of first light emitting elements emitting first color light; Testing the first device wafer to obtain a wavelength distribution of the first light-emitting element in the first device wafer; the first device wafer includes a plurality of test areas, each of the test areas includes at least one of the first light-emitting elements; determining the wavelength distribution based on a dominant wavelength of the test area; Determining a wafer complementary group, wherein the wafer complementary group includes c first device wafers having complementary wavelength distributions; Soldering and fixing a plurality of first light emitting elements arranged in an array on an array substrate, wherein the first light emitting elements soldered and fixed on the array substrate are connected to the same wafer complementary group; in, The array substrate has a plurality of first light-emitting units arranged in an array; the first light-emitting unit includes at least one first light-emitting element; the main wavelength of the first light-emitting element in the same first light-emitting unit meets a first preset condition; In two adjacent first light-emitting units in a first direction, the main wavelengths of the first light-emitting elements have a first difference D1; the first direction includes at least one of a row direction and a column direction of an array where the first light-emitting units are located; In the first light-emitting units adjacent to each other in the second direction, the main wavelengths of the first light-emitting elements have a second difference D2; the second direction and the first direction have an angle greater than 0° and less than 90°; Among them, |D1-D2|>0.

24. The preparation method according to claim 23, characterized in that: The method for testing the first device wafer includes: Divide the rectangular effective area of ​​the first device wafer into M rows and N columns of the test areas, where M and N are both positive integers greater than 1; The dominant wavelengths of the test areas are tested respectively to determine the wavelength distribution of the first light-emitting elements in the first device wafer.

25. The preparation method according to claim 24, characterized in that: In the same first device wafer, the test areas in M ​​rows and N columns are sequentially the first test area to the Pth test area, where P=M*N; The method of determining the wafer complementary group includes: Calculate the average value H of the main wavelength of the kth test area in c first device wafers k , k is a positive integer not greater than P; Corresponding to the M rows and N columns of the test areas, from H1 of the first test area to H P A main wavelength matrix consisting of M rows and N columns; Calculating the range and standard deviation of the dominant wavelength matrix; If the range does not exceed the first calibration value, and the standard deviation does not exceed the second calibration value, then the wavelength distributions of the c first device wafers are complementary.

26. The preparation method according to claim 25, characterized in that: The first calibration value is not greater than 4 nm, and the second calibration value is not greater than 0.6 nm.

27. The preparation method according to claim 23, characterized in that: Also includes: Based on the wafer complementary group of the second device wafer, second light emitting elements arranged in an array are welded and fixed on the array substrate; Wherein, the display panel includes a plurality of pixel units, and the pixel units include the first light-emitting element with a main wavelength and the second light-emitting element with a main wavelength; the plurality of pixel units include a first pixel unit and a second pixel unit, the main wavelength of the first light-emitting element in the first pixel unit is greater than the main wavelength of the first light-emitting element in the second pixel unit, and the main wavelength of the second light-emitting element in the first pixel unit is greater than the main wavelength of the second light-emitting element in the second pixel unit.

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