Display panel, display device and preparation method of display panel
By dividing molecular areas on the display panel and limiting the wavelength range of the light emitting chip, the problems of uneven brightness and chromaticity caused by uneven luminous performance of LED chips are solved, and a more uniform display effect and a better user experience are achieved.
Patent Information
- Application Number
- CN202310800866.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-30
- Publication Date
- 2024-12-31
AI Technical Summary
During the growth process, due to the limitations of the equipment structure and process parameters, the luminous performance of the LED chip is uneven, resulting in uneven brightness and chromaticity of the display panel, affecting the user experience.
By dividing multiple sub-regions on the display panel and limiting the wavelength of the light-emitting chip to the corresponding preset range, an array arrangement with increasing wavelengths and decreasing wavelengths is formed to ensure the uniformity of the light-emitting chip wavelengths of each sub-region, thereby avoiding brightness and The problem of uneven chromaticity.
It realizes brightness and chromaticity uniformity of the display panel, improving the display effect and user experience.
Smart Images
Figure CN119230536A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of display technology, and in particular to a display panel, a display device, and a method for manufacturing a display panel. Background Art
[0002] At present, the growth process of light-emitting diode (LED) chips is limited by the growth equipment structure, process parameters, wafer warping and other issues, and the luminous performance of different areas in the LED epitaxial wafer varies. Therefore, after these LED chips with different luminous performance are transferred to the display panel, the brightness and color between the pixels on the display panel will show unevenness.
[0003] When the brightness and chromaticity on the display panel are uneven, it will bring a bad experience to the user. Therefore, it is urgent to improve the problem of uneven brightness and chromaticity in the display panel to improve the user experience. Summary of the invention
[0004] The present application provides a display panel, a display device and a method for manufacturing a display panel, which can reduce or even eliminate the problem of uneven brightness and chromaticity of the display panel.
[0005] A first aspect of an embodiment of the present application provides a display panel, wherein a display area of the display panel includes at least one first region, in which at least one light-emitting chip is distributed; the first region includes multiple first sub-regions, and the wavelengths of the light-emitting chips in the first sub-regions are all within a first preset range corresponding to the first sub-region.
[0006] Among them, in the first area, multiple first sub-areas are arranged in an array to form multiple display rows and display columns; in the display row, along the first direction, the target characteristic value corresponding to the first sub-area increases and then decreases, wherein the first sub-area corresponds one-to-one to the target characteristic value, and the target characteristic value corresponding to the first sub-area is positively correlated with the wavelength of the light-emitting chip in the first sub-area; preferably, in the display row, the target characteristic values corresponding to two symmetrically arranged first sub-areas are equal.
[0007] Wherein, in the display column, along the second direction, the target feature values corresponding to the first sub-areas increase and then decrease; preferably, in the display column, the target feature values corresponding to two symmetrically arranged first sub-areas are equal.
[0008] Among them, in the display column, along the second direction, the target feature values corresponding to the first sub-areas in the even-numbered display rows decrease, and the target feature values corresponding to the first sub-areas in the odd-numbered display rows increase.
[0009] Among them, in the display row, the first preset ranges corresponding to two adjacent first sub-areas are defined as λa~λb, λc~λd, respectively, where λb=λc; or, the first area is square, and the first area is further divided into four second sub-areas arranged in an array and of the same size, and the second sub-area includes a plurality of the first sub-areas; in the second sub-areas, in a direction parallel to the diagonal line, the first preset ranges corresponding to two adjacent first sub-areas are defined as λe~λf, λg~λh, respectively, where λf=λg.
[0010] Wherein, the number of the first regions is multiple, and the multiple first regions are arranged in an array; preferably, the difference between the maximum value and the minimum value of the first preset range corresponding to any first sub-region is equal; preferably, the first region is further divided into a plurality of second sub-regions of the same size, and the second sub-region includes K first sub-regions; at the same time, the minimum wavelength of the light-emitting chip in the first region is defined as λm, and the maximum wavelength is defined as λn, wherein the difference Δλ between the maximum value and the minimum value of the first preset range corresponding to any first sub-region is equal to
[0011] A second aspect of the embodiments of the present application provides a display device, which includes the display panel in the above embodiment.
[0012] A third aspect of an embodiment of the present application provides a method for preparing a display panel, the method comprising: dividing a first area of a target substrate into a plurality of first sub-areas, and determining a first preset range corresponding to each first sub-area; transferring a light-emitting chip to the target substrate, wherein the wavelength of the light-emitting chip transferred to the first sub-area is within the first preset range corresponding to the first sub-area.
[0013] Among them, the step of transferring the light-emitting chip to the target substrate includes: dividing the wafer into multiple target areas, wherein the wafer includes multiple light-emitting chips; for each target area, determining the target wavelength corresponding to the target area according to the wavelength of the light-emitting chip in the target area; transferring the light-emitting chip in the target area to a first sub-area matching the target area, wherein the target wavelength corresponding to the target area is within a first preset range corresponding to the matching first sub-area.
[0014] The step of determining the target wavelength corresponding to the target area according to the wavelength of the light-emitting chips in the target area includes: calculating the average wavelength of the light-emitting chips in the target area to obtain the target wavelength corresponding to the target area.
[0015] The beneficial effect is: the present application selects light-emitting chips with wavelengths within the corresponding first preset range in the first sub-region, which can avoid the problem of uneven brightness and chromaticity of the display panel caused by large wavelength differences in the same first sub-region. Therefore, the solution of the present application can make the brightness and chromaticity of the display panel uniform, thereby improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0017] Figure 1 is a schematic structural diagram of an embodiment of a display panel in the present application;
[0018] Figure 2 is a schematic structural diagram of an embodiment of a first area in a display panel in the present application;
[0019] Figure 3 is a structural schematic diagram of another embodiment of the first area in the display panel in the present application;
[0020] Figure 4 is a structural schematic diagram of another embodiment of the first area in the display panel in the present application;
[0021] Figure 5 is a structural schematic diagram of yet another embodiment of the first area in the display panel in the present application;
[0022] Figure 6 It is a schematic diagram of a process of an embodiment of a method for preparing a display panel in the present application;
[0023] Figure 7 yes Figure 6 A schematic diagram of another embodiment of step S2;
[0024] Figure 8 It is a structural schematic diagram of an embodiment of a target area in a wafer in the present application. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0026] It should be noted that the terms "first" and "second" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.
[0027] See also Figure 1 and Figure 2 The present application provides a display panel, the display area of which includes at least one first region 1, in which at least one light-emitting chip is distributed; the first region 1 includes multiple first sub-regions 2, and the wavelengths of the light-emitting chips in the first sub-regions 2 are all within a first preset range corresponding to the first sub-regions 2.
[0028] Specifically, the number of light-emitting chips distributed in the first area 1 may be one or more, and the light-emitting chip may be a light-emitting diode (LED) or a micro light-emitting diode (Mirco-LED). The light-emitting chips may be arranged in an array in the first area 1 of the display panel. The first area 1 includes a plurality of first sub-areas 2, and the first sub-area 2 includes at least one light-emitting chip. At the same time, the wavelengths of the light-emitting chips in the first sub-area 2 are all within the first preset range corresponding to the first sub-area 2. Since the wavelengths of the light-emitting chips in the first sub-area 2 are all within the first preset range corresponding to the first sub-area 2, the difference in wavelength of the light-emitting chips in the same first sub-area 2 will not be too large, thereby avoiding the problem of uneven brightness and chromaticity of the display panel caused by large wavelength differences, so that the present application can make the brightness and chromaticity of the display panel uniform, thereby improving the display effect of the display panel.
[0029] See also Figure 3 , Figure 4 and Figure 5 In this embodiment, a corresponding target feature value is set for each first sub-region 2 ( Figures 3 to 5The value in the first sub-region 2 is the target characteristic value corresponding to the first sub-region 2), that is, the first sub-region 2, the first preset range and the target characteristic value form a one-to-one correspondence. Among them, the target characteristic value corresponding to the first sub-region 2 is positively correlated with the wavelength of the light-emitting chip in the first sub-region 2. Specifically, the larger the wavelength of the light-emitting chip in the first sub-region 2, the larger the target characteristic value 2 corresponding to the first sub-region 2. In other words, the larger the minimum value / maximum value of the first preset range, the larger the corresponding target characteristic value. For ease of understanding, an example is used here to illustrate that a first sub-region 2 is defined as a first sub-region A (not shown in the accompanying drawings), and another first sub-region 2 is defined as a first sub-region B (not shown in the accompanying drawings). Assuming that the target characteristic value corresponding to the first sub-region A is 1 and the target characteristic value corresponding to the first sub-region B is 2, it means that the wavelength of the light-emitting chip distributed in the first sub-region A is smaller than the wavelength of the light-emitting chip distributed in the first sub-region B, the minimum value of the first preset range corresponding to the first sub-region A is smaller than the minimum value of the first preset range corresponding to the first sub-region B, and the maximum value of the first preset range corresponding to the first sub-region A is smaller than the maximum value of the first preset range corresponding to the first sub-region B.
[0030] Continue reading Figure 3 , Figure 4 and Figure 5 , in the first area 1, a plurality of first sub-areas 2 are arranged in an array to form a plurality of display rows 4 and display columns 5; in the display row 4, along the first direction X, the target characteristic value corresponding to the first sub-area 2 increases and then decreases. That is to say, in the display row 4, along the first direction X, the minimum value of the first preset range corresponding to the first sub-area 2 increases and then decreases, and the maximum value increases and then decreases. On the one hand, this design can make the wavelength difference of the light-emitting chips in two adjacent first sub-areas 2 in the first area 1 in the first direction X small. On the other hand, when the number of first areas 1 is multiple, this design can also make the wavelength difference of the light-emitting chips in adjacent first areas 1 in the first direction X small. That is to say, the above design can avoid the problem of uneven brightness and chromaticity caused by the inability of the human eye to perceive the wavelength difference, thereby improving user satisfaction.
[0031] Of course, in other embodiments, in display row 4, along the first direction X, the target characteristic value corresponding to the first sub-region 2 decreases and then increases, that is, in display row 4, along the first direction X, the minimum value of the first preset range corresponding to the first sub-region 2 decreases and then increases, and the maximum value decreases and then increases. This design method can also reduce the difference in wavelength values in adjacent first sub-regions 2 in the first direction X and the wavelength difference of the light-emitting chips in adjacent first regions 1, thereby improving the display uniformity of the display panel.
[0032] In one embodiment, in display row 4, the target feature values corresponding to the two symmetrically arranged first sub-areas 2 are equal. Figure 3 as well as Figure 4 , display row 4 includes 20 first sub-regions 2. In the X direction, the target feature value corresponding to the 1st first sub-region 2 is equal to the target feature value corresponding to the 20th first sub-region 2, the target feature value corresponding to the 2nd first sub-region 2 is equal to the target feature value corresponding to the 19th first sub-region 2, and so on. The target feature value corresponding to the 10th first sub-region 2 is equal to the target feature value corresponding to the 11th first sub-region 2.
[0033] Of course, in other embodiments, in the display row 4, the target characteristic values corresponding to the two symmetrically arranged first sub-areas 2 may also be unequal.
[0034] Please continue reading Figure 3 and Figure 4 , in display column 5, along the second direction Y, the target characteristic value corresponding to the first sub-region 2 increases and then decreases. On the one hand, this design can make the wavelength difference of the light-emitting chips in two adjacent first sub-regions 2 in the first region 1 in the second direction Y small, and on the other hand, when there are multiple first regions 1, this design can also make the wavelength difference of the light-emitting chips in adjacent first regions 1 in the first direction Y small.
[0035] In this embodiment, in the display column 5, the target feature values corresponding to the two symmetrically arranged first sub-areas 2 are equal. Figure 3 as well as Figure 4 , display column 5 includes 20 first sub-areas 2. In the Y direction, the target feature value corresponding to the 1st first sub-area 2 is equal to the target feature value corresponding to the 20th first sub-area 2, the target feature value corresponding to the 2nd first sub-area 2 is equal to the target feature value corresponding to the 19th first sub-area 2, and so on. The target feature value corresponding to the 10th first sub-area 2 is equal to the target feature value corresponding to the 11th first sub-area 2.
[0036] Of course, in other embodiments, in the display column 5 , the target characteristic values corresponding to the two symmetrically arranged first sub-areas 2 may not be equal.
[0037] Please continue reading Figure 5 , in the display column 5, along the second direction Y, the target feature values corresponding to the first sub-areas 2 in the even-numbered display rows 4 decrease, and the target feature values corresponding to the first sub-areas 2 in the odd-numbered display rows 4 increase.
[0038] Specifically, in the display column 5, along the second direction Y, the minimum value of the first preset range corresponding to the first sub-area 2 in the even display row 4 decreases and the maximum value decreases, and the minimum value of the first preset range corresponding to the first sub-area 2 in the odd display row 4 increases and the maximum value increases. That is to say, along the second direction Y, the wavelength of the light-emitting chip corresponding to the first sub-area 2 in the even display row 2 decreases, and the wavelength of the light-emitting chip corresponding to the first sub-area 2 in the odd display row 2 increases. This design method can be applied to the case where the wavelength value difference of the light-emitting chip in the first sub-area 2 is small in the direction of the display column 5. By cross-arranging the light-emitting chip with a larger wavelength value and the light-emitting chip with a smaller wavelength value in the second direction Y where the display column 5 is located, it is helpful to ensure the display effect of the display panel. At the same time, in the cross-arrangement method, the human eye will not perceive the display difference, thereby improving user satisfaction.
[0039] In one embodiment, see Figure 3 , in display row 4, the first preset ranges corresponding to two adjacent first sub-areas 2 are defined as λa~λb and λc~λd, respectively, where λb=λc, that is, in display row 4, the maximum value of the first preset range corresponding to the first sub-area 2 is equal to the minimum value of the first preset range corresponding to the adjacent first sub-area 2. For example, in the first display row 4, the first preset range corresponding to the first first sub-area 2 is λ1~λ2, the first preset range corresponding to the second first sub-area 2 is λ2~λ3, the first preset range corresponding to the third first sub-area 2 is λ3~λ4, and so on. This design can make the wavelength values in adjacent first sub-areas 2 in display row 4 gradually change, that is, the wavelength values of adjacent first sub-areas 2 in display row 4 have a small difference, which will not affect the brightness consistency of the display panel.
[0040] In another embodiment, the maximum value of the first preset range corresponding to the first sub-region 2 in the display column 5 is equal to the minimum value of the first preset range corresponding to the adjacent first sub-region 2. This allows the wavelength values in the adjacent first sub-regions 2 in the display column 5 to gradually change, that is, the wavelength values of the adjacent first sub-regions 2 in the display column 5 have a small difference, which will not affect the brightness consistency of the display panel.
[0041] In another embodiment, see Figure 4, the first area 1 is square, and the first area 1 is further divided into four second sub-areas 3 arranged in an array and of the same size, and the second sub-area 3 includes multiple first sub-areas 2; in the second sub-area 3, in the direction parallel to the diagonal, the first preset ranges corresponding to the two adjacent first sub-areas 2 are defined as λe~λf, λg~λh, respectively, where λf=λg. Specifically, in the second sub-area 3, in the direction parallel to the diagonal, the maximum value of the first preset range corresponding to the first sub-area 2 is equal to the minimum value of the first preset range corresponding to the adjacent first sub-area 2. This design makes the wavelength value difference of the light-emitting chips in the two adjacent first sub-areas 2 in the diagonal direction in the first area 1 small, and the human eye cannot perceive the problem of uneven brightness and chromaticity caused by the wavelength difference, thereby improving user satisfaction and avoiding the influence of the large difference in the wavelength value of the light-emitting chips in the adjacent first sub-areas 2 on the display effect.
[0042] In one embodiment, there are multiple first regions 1, and the multiple first regions 1 are arranged in an array; wherein each first region 1 realizes a long-range gradient arrangement of wavelength, and the display effect of a single first region 1 is better. When the multiple first regions 1 are arranged in an array, the brightness and chromaticity of the display panel can be well consistent, thereby improving the display effect.
[0043] In one embodiment, the difference between the maximum value and the minimum value of the first preset range corresponding to any first sub-region 2 is equal. For example, the difference between the maximum value and the minimum value of any first preset range is equal to P, and the P value can be preset. Specifically, this setting can reduce the difference in wavelength of the light-emitting chips in any two adjacent first sub-regions 2, thereby improving the uniformity of the display brightness of the display panel.
[0044] In one embodiment, the first region 1 is further divided into a plurality of second sub-regions 3 of the same size, and the second sub-region 3 includes K first sub-regions 2; at the same time, the minimum wavelength of the light-emitting chip in the first region 1 is defined as λm, and the maximum wavelength is defined as λn, wherein the difference Δλ between the maximum value and the minimum value of the first preset range corresponding to any first sub-region 2 is equal to Specifically, this arrangement can not only reduce the difference in wavelengths of the light-emitting chips in any two adjacent first sub-regions 2, but also ensure that the difference in wavelength of the light-emitting chips in each first sub-region 2 is minimized, thereby further improving the uniformity of display brightness.
[0045] For ease of understanding, Figures 3 to 5 In this case, the second sub-area 3 includes 100 first sub-areas 2, so that At the same time, define λ1=λm+Δλ, λ2=λ1+Δλ, λ3=λ2+Δλ, λi=λi-1+Δλ, λ100=λ99+Δλ.
[0046] At the same time, in the second sub-region 3, 1 to 100 are used to represent the target feature values of the 100 first sub-regions 2, and for the first sub-region 2 with a target feature value of 1, the corresponding first preset range is λm~λ1, for the first sub-region 2 with a target feature value of 2, the corresponding first preset range is λ1~λ2, and so on. For the first sub-region 2 with a target feature value of 100, the corresponding first preset range is λ99~λ100.
[0047] At this time, the first sub-area 2 in the first area 1 can be Figures 3 to 5 Arranged in the manner shown, Figures 3 to 5 The value in the first sub-region 2 is the target feature value corresponding to the first sub-region 2.
[0048] The present application also provides a display device, which includes the display panel in the above embodiment, so the display device has all the features and advantages of the display panel described above. Specifically, the display device includes mobile or fixed terminals such as electronic paper, mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo frames, smart bracelets, smart watches, super personal computers, and navigators.
[0049] See also Figure 6 The present application also provides a method for preparing a display panel, the method comprising:
[0050] S1: Divide a first area 1 of a target substrate into a plurality of first sub-areas 2, and determine a first preset range corresponding to each first sub-area 2.
[0051] The first area 1 of the target substrate is divided into a plurality of first sub-areas 2, wherein the first sub-area 2 includes at least one light-emitting chip. A first preset range corresponding to each first sub-area 2 is determined according to the need for long-range gradient arrangement of wavelength.
[0052] Among them, the first preset range corresponding to the first sub-area 2 can be set according to the rules introduced in the above implementation mode. For details, please refer to the above related content, which will not be repeated here.
[0053] S2: transferring the light-emitting chips to the target substrate, wherein the wavelengths of the light-emitting chips transferred to the first sub-region 2 are all within a first preset range corresponding to the first sub-region 2 .
[0054] The light-emitting chips are transferred to the target substrate to complete the preparation of the display panel. The wavelengths of the light-emitting chips transferred to the first sub-region 2 are all within the first preset range corresponding to the first sub-region 2. By using light-emitting chips with wavelengths within the corresponding first preset range in the first sub-region 2, the wavelength difference of the light-emitting chips in the same first sub-region 2 is small, which will not affect the brightness and chromaticity uniformity of the display panel, thereby improving the display effect of the display panel.
[0055] Among them, see Figure 7 The step of transferring the light emitting chip to the target substrate in step S2 includes:
[0056] S21: Divide the wafer 6 into a plurality of target areas 7, wherein the wafer 6 includes a plurality of light-emitting chips.
[0057] See also Figure 8 , dividing the wafer 6 into a plurality of target areas 7, wherein the wafer 6 includes a plurality of light-emitting chips, and the shape of the target area 7 can be a quadrilateral, a triangle or other different shapes, and the shape of the target area 7 can be designed according to actual needs.
[0058] S22 : For each target area 7 , according to the wavelength of the light-emitting chip in the target area 7 , determine the target wavelength corresponding to the target area 7 .
[0059] In each target area 7, the wavelengths of all the light emitting chips in the target area 7 can be obtained, and the target wavelength corresponding to the target area 7 can be determined through the wavelength values of all the light emitting chips. After step S22, one target area 7 corresponds to one target wavelength.
[0060] S23: transferring the light-emitting chip in the target area 7 to the first sub-area 2 matching the target area 7 , wherein the target wavelength corresponding to the target area 7 is within a first preset range corresponding to the matching first sub-area 2 .
[0061] When the target wavelength corresponding to the target area 7 is within the first preset range corresponding to the matched first sub-area 2, the light-emitting chip in the target area 7 can be transferred to the first sub-area 2 matching the target area 7. For example, if the target wavelength corresponding to a target area 7 is λ1.5, and the first preset range corresponding to a first sub-area 2 is λ1-λ2, the light-emitting chip in the target area 7 is transferred to the first sub-area 2.
[0062] Wherein, step S22 comprises:
[0063] S221: Calculate the average wavelength of the light-emitting chips in the target area 7 to obtain the target wavelength corresponding to the target area 7.
[0064] In one embodiment, the target wavelength corresponding to the target area 7 is determined by calculating the average wavelength of the light-emitting chips in the target area 7. When the light-emitting chip is a Micro-LED, the size of a single light-emitting chip is relatively small. When the target area 7 contains multiple light-emitting chips, and the average wavelength of the light-emitting chips in the target area 7 is used as the target wavelength of the target area 7, when the first preset range of the first sub-area 2 is determined, the light-emitting chip can be picked up from the target area 7 where the target wavelength is within the first preset range for transfer. This improves the production efficiency of the display panel.
[0065] In other implementations, the mode or median of the wavelengths of the light-emitting chips in the target area 7 may be determined, and then the mode or median is determined as the target wavelength corresponding to the target area 7 .
[0066] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A display panel, characterized in that: The display area of the display panel includes at least one first area, and at least one light-emitting chip is distributed in the first area; The first region includes a plurality of first sub-regions, and the wavelengths of the light-emitting chips in the first sub-regions are all within a first preset range corresponding to the first sub-regions.
2. The display panel according to claim 1, characterized in that: In the first area, a plurality of the first sub-areas are arranged in an array to form a plurality of display rows and display columns; In the display row, along the first direction, the target characteristic value corresponding to the first sub-region increases and then decreases, wherein the first sub-region corresponds to the target characteristic value one-to-one, and the target characteristic value corresponding to the first sub-region is positively correlated with the wavelength of the light-emitting chip in the first sub-region; Preferably, in the display row, the target feature values corresponding to two symmetrically arranged first sub-areas are equal.
3. The display panel according to claim 2, characterized in that: In the display column, along the second direction, the target feature value corresponding to the first sub-area increases and then decreases; Preferably, in the display column, the target feature values corresponding to two symmetrically arranged first sub-areas are equal.
4. The display panel according to claim 2, characterized in that: In the display column, along the second direction, the target feature values corresponding to the first sub-regions in the even-numbered display rows decrease, and the target feature values corresponding to the first sub-regions in the odd-numbered display rows increase.
5. The display panel according to claim 2, characterized in that: In the display row, the first preset ranges corresponding to two adjacent first sub-areas are defined as λa-λb and λc-λd, respectively, where λb=λc; Alternatively, the first area is in a square shape, and the first area is further divided into four second sub-areas arranged in an array and having the same size, and the second sub-areas include a plurality of the first sub-areas; In the second sub-region, in a direction parallel to the diagonal line, the first preset ranges corresponding to two adjacent first sub-regions are defined as λe~λf and λg~λh respectively, where λf=λg.
6. The display panel according to claim 1, characterized in that: There are multiple first regions, and the multiple first regions are arranged in an array; Preferably, the difference between the maximum value and the minimum value of the first preset range corresponding to any first sub-region is equal; Preferably, the first area is further divided into a plurality of second sub-areas of the same size, and the second sub-areas include K first sub-areas; At the same time, the minimum wavelength of the light-emitting chip in the first region is defined as λm, and the maximum wavelength is defined as λn, wherein the difference Δλ between the maximum value and the minimum value of the first preset range corresponding to any first sub-region is equal to 7. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 6.
8. A method for preparing a display panel, characterized in that: The method comprises: Dividing a first area of the target substrate into a plurality of first sub-areas, and determining a first preset range corresponding to each of the first sub-areas; The light-emitting chips are transferred to the target substrate, wherein the wavelengths of the light-emitting chips transferred to the first sub-region are all within a first preset range corresponding to the first sub-region.
9. The preparation method according to claim 8, characterized in that: The step of transferring the light-emitting chip to the target substrate comprises: Dividing a wafer into a plurality of target areas, wherein the wafer includes a plurality of the light-emitting chips; For each of the target areas, determining a target wavelength corresponding to the target area according to the wavelength of the light-emitting chip in the target area; The light emitting chip in the target area is transferred to the first sub-area matching the target area, wherein the target wavelength corresponding to the target area is within the first preset range corresponding to the matching first sub-area.
10. The preparation method according to claim 9, characterized in that: The step of determining a target wavelength corresponding to the target area according to the wavelength of the light-emitting chip in the target area comprises: The average wavelength of the light-emitting chip in the target area is calculated to obtain the target wavelength corresponding to the target area.