CN110262120B

CN110262120B - Substrate, preparation method thereof and display panel

Info

Publication number: CN110262120B
Application number: CN201910702949.9A
Authority: CN
Inventors: 万冀豫; 杨同华; 宋勇志; 姜晶晶; 徐天洋
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2022-03-04
Anticipated expiration: 2039-07-31
Also published as: CN110262120A

Abstract

The embodiment of the invention provides a substrate, a preparation method thereof and a display panel, relates to the technical field of display and can improve the display effect. A substrate is provided with a display area and a peripheral area; the substrate includes: the black matrix is arranged on the substrate; the black matrix extends from the display area to the peripheral area and surrounds the display area for one circle in the peripheral area; the black matrix is provided with a groove which surrounds the display area by one circle in the peripheral area, and the groove penetrates through the black matrix along the thickness direction of the black matrix; a plurality of first color filter units are arranged in the groove, the first color filter units are sequentially arranged around the groove, and the first color filter units are randomly adjacent and used for enabling light with different colors to pass through.

Description

Substrate, preparation method thereof and display panel

Technical Field

The invention relates to the technical field of display, in particular to a substrate, a preparation method of the substrate and a display panel.

Background

With the development of display technology, the demand of consumers for display products is increasing, and the demand for the performance of the display products is also increasing. The display product of narrow frame can promote display area, realizes the wide-screen display, brings better viewing effect for the user, becomes the design mainstream gradually.

Disclosure of Invention

The embodiment of the invention provides a substrate, a preparation method thereof and a display panel, which can improve the display effect.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a substrate having a display area and a peripheral area is provided; the substrate includes: the black matrix is arranged on the substrate; the black matrix extends from the display area to the peripheral area and surrounds the display area for one circle in the peripheral area; the black matrix is provided with a groove which surrounds the display area by one circle in the peripheral area, and the groove penetrates through the black matrix along the thickness direction of the black matrix; a plurality of first color filter units are arranged in the groove, the first color filter units are sequentially arranged around the groove, and the first color filter units are randomly adjacent and used for enabling light with different colors to pass through. Optionally, the plurality of first color filter units include at least two of a first filter unit, a second filter unit, and a third filter unit; the first filter unit is used for enabling first color light to pass, the second filter unit is used for enabling second color light to pass, and the third filter unit is used for enabling third color light to pass. Optionally, the first color, the second color, and the third color are three primary colors.

Optionally, the plurality of first color filter units include a first filter unit, a second filter unit, and a third filter unit; the first light filtering unit, the second light filtering unit and the third light filtering unit are sequentially arranged around the slot.

Optionally, each of the first color filter units includes a first sub-unit and a second sub-unit; the second subunit is positioned on one side of the first subunit, which is far away from the substrate, and orthographic projections of the second subunit and the first subunit on the substrate are superposed; the materials of the first subunit and the second subunit both comprise organic dyes, and the colors of the organic dyes in the first subunit and the second subunit are different.

Optionally, the first color, the second color and the third color are each one of cyan, magenta and yellow; in the first light filtering unit, the color of the organic dye in the first subunit is red, and the color of the organic dye in the second subunit is green; in the second light filtering unit, the color of the organic dye in the first subunit is green, and the color of the organic dye in the second subunit is blue; in the third filtering unit, the color of the organic dye in the first subunit is red, and the color of the organic dye in the second subunit is blue; wherein, under the condition that the color of the organic dye in any adjacent first subunit is the same, the adjacent first subunits are of an integral structure; in the case that the color of the organic dye in any adjacent second subunit is the same, the adjacent second subunits are of an integral structure.

Optionally, the length of the first color filter unit is less than or equal to 100 μm in a direction perpendicular to the width direction of the slot.

Optionally, the black matrix defines a plurality of sub-pixel regions in the display region; a plurality of second color filtering units are correspondingly arranged in the sub-pixel areas one by one; the plurality of second color filter units comprise a fourth filter unit, a fifth filter unit and a sixth filter unit; the materials of the fourth filtering unit, the fifth filtering unit and the sixth filtering unit all comprise organic dyes, and the colors of the organic dyes in the fourth filtering unit, the fifth filtering unit and the sixth filtering unit are respectively a first color, a second color and a third color; the colors of the organic dyes in the first light filtering unit, the second light filtering unit and the third light filtering unit are respectively a first color, a second color and a third color. Optionally, the black matrix defines a plurality of sub-pixel regions in the display region; a plurality of second color filtering units are correspondingly arranged in the sub-pixel areas one by one; the plurality of second color filter units comprise a fourth filter unit, a fifth filter unit and a sixth filter unit; the materials of the fourth light filtering unit, the fifth light filtering unit and the sixth light filtering unit all comprise organic dyes, and the colors of the organic dyes in the fourth light filtering unit, the fifth light filtering unit and the sixth light filtering unit are respectively red, green and blue.

In a second aspect, a display panel is provided, which includes the substrate.

In a third aspect, a method for manufacturing a substrate having a display area and a peripheral area is provided; the preparation method of the substrate comprises the following steps: forming a black matrix on a substrate; the black matrix extends from the display area to the peripheral area and surrounds the display area for one circle in the peripheral area; the black matrix defines a plurality of sub-pixel regions in the display region; the black matrix is provided with a groove which surrounds the display area for one circle in the peripheral area, and the groove penetrates through the black matrix along the thickness direction of the black matrix; forming a plurality of first color filter units in the slot, wherein the first color filter units are sequentially arranged around the slot, and any adjacent first color filter units are used for allowing light with different colors to pass through; and a plurality of second color filtering units are formed in the sub-pixel areas in a one-to-one correspondence mode, and the first color filtering units and the second color filtering units are formed synchronously.

Optionally, the plurality of first color filter units include at least two of a first filter unit, a second filter unit, and a third filter unit; the plurality of second color filter units comprise a fourth filter unit, a fifth filter unit and a sixth filter unit; forming the first, second, third, fourth, fifth, and sixth filtering units includes: synchronously forming the first filtering unit and the fourth filtering unit; the materials of the first light filtering unit and the fourth light filtering unit both comprise organic dyes, and the colors of the organic dyes in the first light filtering unit and the fourth light filtering unit are first colors; or, forming the fourth filtering unit, where a material of the fourth filtering unit includes an organic dye, and a color of the organic dye in the fourth filtering unit is a first color; synchronously forming the second filtering unit and the fifth filtering unit; the materials of the second light filtering unit and the fifth light filtering unit both comprise organic dyes, and the colors of the organic dyes in the second light filtering unit and the fifth light filtering unit are both second colors; synchronously forming the third filtering unit and the sixth filtering unit; the materials of the third light filtering unit and the sixth light filtering unit both comprise organic dyes, and the colors of the organic dyes in the third light filtering unit and the sixth light filtering unit are third colors; the first color, the second color and the third color are three primary colors.

Optionally, each of the first color filter units at least includes a first sub-unit and a second sub-unit; forming a plurality of the first color filter units includes: forming the first subunit in the open groove, forming the second subunit on the side, away from the substrate, of the first subunit, and enabling projections of the second subunit and the first subunit on the substrate to be coincident; the materials of the first subunit and the second subunit both comprise organic dyes, and the colors of the organic dyes in the first subunit and the second subunit are different.

Optionally, the plurality of first color filter units include a first filter unit, a second filter unit, and a third filter unit; each first color filter unit comprises a first subunit and a second subunit; the plurality of second color filter units comprise a fourth filter unit, a fifth filter unit and a sixth filter unit; forming the first, second, third, fourth, fifth, and sixth filtering units includes: synchronously forming the first subunit in the first filtering unit, the first subunit in the third filtering unit and the fourth filtering unit; the materials of the first subunit in the first light filtering unit, the first subunit in the third light filtering unit and the fourth light filtering unit all comprise organic dyes, and the colors of the organic dyes in the first subunit in the first light filtering unit, the first subunit in the third light filtering unit and the fourth light filtering unit are red; the first sub-unit in the first filtering unit and the first sub-unit in the third filtering unit are adjacent to each other and are of an integral structure; synchronously forming the second subunit in the first light filtering unit, the first subunit in the second light filtering unit and the fifth light filtering unit; the materials of the second subunit in the first light filtering unit, the first subunit in the second light filtering unit and the fifth light filtering unit all comprise organic dyes, and the colors of the organic dyes in the second subunit in the first light filtering unit, the first subunit in the second light filtering unit and the fifth light filtering unit are green; synchronously forming the second subunit in the second filtering unit, the second subunit in the third filtering unit and the sixth filtering unit; the materials of the second subunit in the second light filtering unit, the second subunit in the third light filtering unit and the sixth light filtering unit all comprise organic dyes, and the colors of the organic dyes in the second subunit in the second light filtering unit, the second subunit in the third light filtering unit and the sixth light filtering unit are blue; the second sub-unit in the second filtering unit and the second sub-unit in the third filtering unit are adjacent to each other and are of an integral structure.

The embodiment of the invention provides a substrate, a preparation method thereof and a display panel, wherein a black matrix is provided with a groove surrounding a region for one circle in a peripheral region, and the groove penetrates through the black matrix along the thickness direction of the black matrix; a plurality of first color filter units are arranged in the groove, the first color filter units are sequentially arranged around the groove, and any adjacent first color filter unit is used for enabling light with different colors to pass through. Compared with the condition that the substrate is directly exposed by the groove, the light is directly emitted from the groove, so that the brightness difference between the groove and the surrounding black matrix is larger, and a transparent white stripe or other color stripes are formed, and the display effect is influenced. In addition, compared with the method that the groove is covered with a blue filter unit with low transmittance, for example, used for enabling blue light to pass through or a red filter unit for enabling red light to pass through, the light passing through the groove is reduced, the brightness difference between the groove and a black matrix around the groove is reduced, meanwhile, serious blue stripes or dark red stripes can appear, and the display effect is influenced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 4 is a schematic top view of a substrate according to an embodiment of the invention;

FIG. 5 is a schematic cross-sectional view of the substrate of FIG. 4 along the direction B-B';

fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 7 is a schematic top view of a substrate according to the prior art;

FIG. 8 is a schematic cross-sectional view of the substrate of FIG. 7 taken along the direction C-C';

fig. 9 is a schematic structural diagram of a display panel provided in the prior art;

FIG. 10 is a schematic diagram of a substrate according to the prior art;

FIG. 11 is a schematic view of another substrate structure provided in the prior art;

fig. 12 is a schematic structural diagram of a substrate according to an embodiment of the invention;

FIG. 13 is a schematic structural diagram of another substrate according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of another substrate according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of another substrate according to an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of another substrate according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of another substrate according to an embodiment of the invention;

FIG. 18 is a schematic top view of another substrate provided in accordance with an embodiment of the present invention;

fig. 19 is a schematic flow chart illustrating a method for fabricating a substrate according to an embodiment of the invention;

fig. 20 is a schematic flow chart illustrating another method for manufacturing a substrate according to an embodiment of the present invention;

fig. 21 is a schematic flow chart illustrating a method for fabricating a substrate according to another embodiment of the present invention;

fig. 22 is a schematic view of a manufacturing process of a substrate according to an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a display panel. As shown in fig. 1, the display panel has a display area (AA area) and a peripheral area S, for example, the peripheral area S is disposed around the AA area. A plurality of sub-pixel regions P are arranged in the AA region; the plurality of sub-pixel regions P include at least first, second, and third color sub-pixels, the first, second, and third colors being three primary colors (e.g., red, green, and blue).

Fig. 1 illustrates an example of the arrangement of the plurality of sub-pixels in an array. In this case, the sub-pixels arranged in a line in the horizontal direction X are referred to as the same row of sub-pixels, and the sub-pixels arranged in a line in the vertical direction Y are referred to as the same column of sub-pixels.

On the basis, optionally, the sub-pixels in the same row can be connected with a grid line, and the sub-pixels in the same column can be connected with a data line.

Optionally, the display panel is a liquid crystal display panel, in this case, as shown in fig. 2, the liquid crystal display panel includes an array substrate 10, a color filter substrate 20, and a liquid crystal layer 30 disposed therebetween.

As shown in fig. 2, a TFT (Thin Film Transistor) and a pixel electrode 12 are included on the array substrate 10 corresponding to each subpixel region P. In some embodiments, the array substrate 10 may further include a common electrode 13. Here, the pixel electrode 12 and the common electrode 13 may be disposed on the same layer, and in this case, the pixel electrode 12 and the common electrode 13 are each a comb-tooth structure including a plurality of strip-shaped sub-electrodes. The pixel electrode 12 and the common electrode 13 may also be provided at different layers, in which case the first insulating layer 14 is provided between the pixel electrode 12 and the common electrode 13 as shown in fig. 2. In the case where the common electrode 13 is provided between the TFT and the pixel electrode 12, as shown in fig. 2, a second insulating layer 15 is further provided between the common electrode 13 and the TFT. In other embodiments, the common electrode 13 is disposed on the color filter substrate 20.

The color filter substrate 20 includes a second color filter unit 24 corresponding to each subpixel region P. It is understood that the color of the light emitted from the second color filter unit 24 in the first color sub-pixel is a first color, the color of the light emitted from the second color filter unit 24 in the second color sub-pixel is a second color, and the color of the light emitted from the second color filter unit 24 in the third color sub-pixel is a third color.

In this case, optionally, as shown in fig. 2, the liquid crystal display panel further includes a first polarizing plate 101 located on a side of the array substrate 10 away from the color filter substrate 20, and a second polarizing plate 201 located on a light-emitting side of the color filter substrate 20, where polarization directions of the first polarizing plate 101 and the second polarizing plate 201 are perpendicular or parallel to each other.

Alternatively, the display panel is a self-luminous display panel, in which case, as shown in fig. 3, the self-luminous display panel includes an array substrate 10 and an encapsulation substrate 60. The package substrate 60 may be a thin film package layer or a rigid substrate.

As shown in fig. 3, the array substrate 10 in the self-luminous display panel includes a pixel driving circuit 50 and a light emitting device 40 corresponding to each sub-pixel region P. The pixel driving circuit 50 is composed of electronic devices such as a TFT and a capacitor (C). For example, the pixel drive circuit 50 may be a pixel drive circuit 50 of a 2T1C structure composed of two TFTs (one switching TFT and one driving TFT) and one capacitor; of course, the pixel driving circuit 50 may be a pixel driving circuit 50 configured by two or more TFTs (a plurality of switching TFTs and one driving TFT) and at least one capacitor.

The above-described light-emitting device 40 includes a cathode 45 and an anode 41, and a light-emitting functional layer located between the cathode 45 and the anode 41. Here, as shown in fig. 3, taking the Light Emitting device as an OLED (Organic Light-Emitting Diode) as an example, the Light Emitting function layer may include an Organic Light-Emitting layer 43, a hole transport layer 42 between the Organic Light-Emitting layer 43 and the anode 41, and an electron transport layer 44 between the Organic Light-Emitting layer 43 and the cathode 45, for example. Of course, in some embodiments, a hole injection layer may also be disposed between the hole transport layer 42 and the anode 41, and an electron injection layer may be disposed between the electron transport layer 44 and the cathode 45, as desired.

It should be noted that fig. 3 is a schematic diagram, and does not show the connection relationship between the pixel driving circuit 50 and the light emitting device 40 (in practice, an appropriate pixel driving circuit 50 may be selected as needed).

On this basis, in the case where the light emitting device 40 emits white light, optionally, as shown in fig. 3, a second color filter unit 24 may be further disposed on the array substrate 10 corresponding to each subpixel region P and on the light emitting side of the light emitting device 40. It is understood that the color of the light emitted from the second color filter unit 24 in the first color sub-pixel is a first color, the color of the light emitted from the second color filter unit 24 in the second color sub-pixel is a second color, and the color of the light emitted from the second color filter unit 24 in the third color sub-pixel is a third color.

Of course, the second color filter unit 24 may be disposed on the package substrate 60, wherein the second color filter unit 24 may be disposed on a side of the package substrate 60 facing the array substrate 10, or on a side of the package substrate 60 away from the array substrate 10.

The embodiment of the invention provides a substrate, which can be applied to the array substrate 10, the color film substrate 20 or the package substrate 60.

As shown in fig. 4-5, the substrate has a display area (AA area) and a peripheral area S. The substrate includes: a substrate 21, and a black matrix 22 provided on the substrate 21; the black matrix 22 extends from the AA area to the peripheral area S, and surrounds the AA area once in the peripheral area S; the black matrix 22 is provided with a groove 221 surrounding the AA region for one circle in the peripheral region S, and the groove 221 penetrates through the black matrix 22 along the thickness direction of the black matrix 22; the plurality of first color filter units 23 are disposed in the slot 221, the plurality of first color filter units 23 are sequentially arranged around the slot 221, and any adjacent first color filter unit 23 is used for allowing light of different colors to pass through.

For example, as shown in fig. 4, the plurality of first color filter units 23 are sequentially arranged around the slot 221, starting from a point F in the slot 221, the plurality of first color filter units 23 are sequentially arranged around the slot 221 in a clockwise direction and then return to the point F, or starting from the point F in the slot 221, the plurality of first color filter units 23 are sequentially arranged around the slot 221 in a counterclockwise direction and then return to the point F.

Wherein, there is no gap between adjacent first color filter units 23.

It can be understood that, the black matrix 22 in the peripheral region S is provided with the slot 221 which surrounds the AA region by one turn, and the slot 221 penetrates through the black matrix 22 along the thickness direction of the black matrix 22, so that the black matrix 22 can form a partition between the peripheral region S and the AA region, thereby preventing the electrostatic charges accumulated in the black matrix 22 from being transmitted from the peripheral region S to the AA region to cause poor display.

It should be noted that, in the actual test of the display product, the display product may be scratched along the row direction (the horizontal direction X shown in fig. 1) and the column direction (the vertical direction Y shown in fig. 1) of the sub-pixel arrangement, for example, the polarizer in the display screen of the mobile phone may be scratched along the row direction and the column direction of the sub-pixel arrangement. Under the condition that the arrangement mode of the sub-pixels in the display panel is that the colors of the sub-pixels in the same row are the same, and the sub-pixels in the same row are sequentially arranged according to the sequence of the red sub-pixels, the green sub-pixels and the blue sub-pixels, when a scratch is observed along the row direction of the sub-pixel arrangement, the scratch is colored due to the close colors of the adjacent sub-pixels, and can be easily recognized by human eyes; when observing the mar along the row direction that the subpixel was arranged, because the colour of adjacent subpixel is different, the subpixel of different colours can carry out space colour mixture, and this mar can be grey, does not show any colour, is difficult for being discerned by the people's eye, realizes space colour separation shading. Further, the transmittance of light by scratches in the row direction of the subpixel arrangement was measured to be about 10%.

On this basis, it can be understood that any adjacent first color filter unit 23 in the slot 221 is used for allowing light of different colors to pass, that is, the colors of the light passing through the adjacent first color filter units 23 in the slot 221 are different, and the light of different colors may be subjected to spatial color mixing, so that the slot 221 is gray as a whole, does not display any color, reduces the contrast between the slot 221 and the surrounding black matrix 22, and is not easy to be observed by human eyes.

Illustratively, the present invention can reduce the contrast of the surrounding black matrix 22 to the grooves 221 from the original 1:10000 to 1: 100.

Optionally, the length of the first color filter unit 23 along the width direction of the vertical slot 221 is less than or equal to 100 μm.

It can be understood that the width of the first color filter unit 23 is equal to the width of the slot 221, so as to prevent light leakage due to a gap between the first color filter unit 23 and the slot 221.

Wherein, the width of the slot 221 is 10 μm to 20 μm.

Illustratively, the thickness of the first color filter unit 23 may be 1 μm to 3 μm. In this case, the transmittance of light by the first color filter unit 23 for passing blue light may be 6% to 27%, the transmittance of light by the first color filter unit 23 for passing red light may be 15.4% to 25%, and the transmittance of light by the first color filter unit 23 for passing green light may be 50% to 70%.

It should be noted that the transmittance of the first color filter unit 23 to light is low, so that the transmittance of the slot 221 to light is also relatively low, and thus, the light can be reduced from passing through the slot 221, and light leakage can be avoided.

Illustratively, the transmittance of the grooves 221 to light is 10% or less.

The embodiment of the invention provides a substrate, wherein the black matrix 22 is provided with a slot 221 surrounding the AA area for a circle in the peripheral area S, and the slot 221 penetrates through the black matrix 22 along the thickness direction of the black matrix 22; the plurality of first color filter units 23 are disposed in the slot 221, the plurality of first color filter units 23 are sequentially arranged around the slot 221, and any adjacent first color filter unit 23 is used for allowing light of different colors to pass through. Compared with the way that the substrate 21 is directly exposed by the slot 221 (as shown in fig. 7-9), the light is directly emitted from the slot 221, which causes a larger luminance difference between the slot 221 and the surrounding black matrix 22 to form a transparent white stripe or other color stripes, which affects the display effect.

Moreover, compared with the method of covering the inside of the slot 221 with the blue filter 2211 (as shown in fig. 10) or the blue filter 2211 and the red filter 2212 (as shown in fig. 11) having smaller transmittance, for example, for passing blue light, so as to reduce the light passing through the slot 221, while reducing the brightness difference between the slot 221 and the black matrix 22 around the slot 221, a more serious blue stripe or dark red stripe may appear, which affects the display effect, in the present invention, any adjacent first color filter 23 in the slot 221 is used for passing light of different colors, and spatial color mixing may be performed, so that the slot 221 is gray, and no color is displayed, thereby reducing the contrast between the slot 221 and the surrounding black matrix 22, so that the slot 221 is not easily recognized by human eyes, thereby improving the display effect.

Alternatively, as shown in fig. 6 and 9, when the substrate is applied to a liquid crystal display panel, the substrate is a color filter substrate 20. The liquid crystal display panel further includes a frame sealing adhesive 31 located between the color film substrate 20 and the array substrate 10, and the groove 221 is closer to the AA area than the frame sealing adhesive 31.

Alternatively, as shown in fig. 12 to 15, the plurality of first color filter units 23 include at least two of the first filter unit 231, the second filter unit 232, and the third filter unit 233; the first filter unit 231 is to pass the first color light, the second filter unit 232 is to pass the second color light, and the third filter unit 233 is to pass the third color light.

The first filtering unit 231 is configured to allow the first color light to pass through, that is, the color of the first filtering unit 231 is the first color; the second filtering unit 232 is used for passing the second color light, that is, the color of the second filtering unit 232 is the second color; the third filter unit 233 is used to pass the third color light, that is, the color of the third filter unit 233 is the third color.

It is understood that, as shown in fig. 12, the plurality of first color filter units 23 includes a first filter unit 231 and a second filter unit 232; alternatively, as shown in fig. 13, the plurality of first color filter units 23 includes a first filter unit 231 and a third filter unit 233; alternatively, as shown in fig. 14, the plurality of first color filter units 23 include the second filter unit 232 and the third filter unit 233, or, as shown in fig. 15, the plurality of first color filter units 23 include the first filter unit 231, the second filter unit 232, and the third filter unit 233.

In the case where the plurality of first color filter units 23 include the first filter unit 231, the second filter unit 232, and the third filter unit 233, the first filter unit 231, the second filter unit 232, and the third filter unit 233 may be arranged in a fixed order or in a random order, but in any order, it is necessary to ensure that any adjacent first color filter units 23 are used to pass light of different colors.

Optionally, the first color, the second color, and the third color are three primary colors.

It is understood that the three primary colors may be red, green, blue, or cyan, magenta, yellow. That is, the colors of the first, second, and

third filtering units

231, 232, and 233 may be red, green, and blue, respectively. Alternatively, the colors of the first, second, and

third filtering units

231, 232, and 233 are cyan, magenta, and yellow, respectively.

The color of the first filter unit 231 is red, which means that the color of the light emitted from the first filter unit 231 is red; the color of the second filter unit 232 is green, which means that the color of light emitted from the second filter unit 232 is green; the color of the third filter unit 233 is blue, which means that the color of light emitted from the third filter unit 233 is blue.

In this case, the materials of the first, second, and

third filtering units

231, 232, and 233 may all use organic dyes, or may all use photoluminescent materials such as quantum dots.

The organic dye may be a mixture of a polymer material and an organic dye, and the difference between the red first filter 231, the green second filter 232, and the blue third filter 233 is the difference between the organic dyes.

For example, in a case where the materials of the first, second, and third

color filter units

23, 232, and 233 are all quantum dot materials, the quantum dot materials include cadmium selenide (CdSe). Since the size of the quantum dot determines the emission color, the size of the quantum dot material in the first filter unit 231, the size of the quantum dot material in the second filter unit 232, and the size of the quantum dot material in the third filter unit 233 are different from each other. In the case where the color of light passing through the first filtering unit 231 is red, the size of the quantum dot material in the first filtering unit 231 may be 2.4 nm; in the case where the color of light passed by the second filter unit 232 is green, the size of the quantum dot material in the second filter unit 232 may be 1.7 nm; in the case where the color of light passed by the third filter unit 233 is blue, the size of the quantum dot material in the third filter unit 233 may be 1.0 nm.

On this basis, alternatively, as shown in fig. 18, the black matrix 22 defines a plurality of sub-pixel regions P in the AA region; a plurality of second color filter units 24 are correspondingly arranged in the plurality of sub-pixel regions P one by one; the plurality of second color filter units 24 include a fourth filter unit 241, a fifth filter unit 242, and a sixth filter unit 243; the materials of the fourth, fifth and

sixth filtering units

241, 242 and 243 all include organic dyes, and the colors of the organic dyes in the fourth, fifth and

sixth filtering units

241, 242 and 243 are the first, second and third colors, respectively; the colors of the organic dyes in the first, second, and

third filtering units

231, 232, and 233 are a first color, a second color, and a third color, respectively.

It is understood that the organic dyes in the fourth filtering unit 241 and the first filtering unit 231 have the same color, and the organic dyes in the sixth filtering unit 243 and the third filtering unit 233 have the same color, and in terms of process, the fourth filtering unit 241 and the first filtering unit 231 may be synchronously formed, and the sixth filtering unit 243 and the third filtering unit 233 may be synchronously formed, thereby simplifying the manufacturing steps.

In addition, the order of the fourth filter unit 241, the fifth filter unit 242, and the sixth filter unit 243 in the plurality of second color filter units 24 is not limited in the present invention. For example, as shown in fig. 18, the fourth filtering unit 241, the fifth filtering unit 242, and the sixth filtering unit 243 may be sequentially arranged in an array form.

Alternatively, as shown in fig. 15, the plurality of first color filter units 23 includes a first filter unit 231, a second filter unit 232, and a third filter unit 233; the first filter unit 231, the second filter unit 232, and the third filter unit 233 are sequentially arranged around the slot 221.

That is, the first, second, and

third filter units

231, 232, and 233 are circularly arranged in the order of the first, second, and

third filter units

231, 232, and 233 in the slot 221, bypassing the slot 221.

It can be understood that the colors of the light passing through the first color filter units 23 located at two sides of each first color filter unit 23 are different, that is, the colors of the light passing through the first color filter units 231 and the third color filter units 232 located at two sides of the second color filter units 232 are different, so that the difference of the colors of the light passing through the adjacent first color filter units 23 is improved, the spatial color mixing effect is improved, and the possibility of the observation of the slot 221 is reduced.

Alternatively, as shown in fig. 16, each of the first color filter units 23 includes a first sub-unit 2301 and a second sub-unit 2302; the second sub-unit 2302 is positioned on the side of the first sub-unit 2301 away from the substrate 21, and the orthographic projections of the second sub-unit 2302 and the first sub-unit 2301 on the substrate 21 are coincident; the materials of the first sub-unit 2301 and the second sub-unit 2302 both comprise organic dyes, and the colors of the organic dyes in the first sub-unit 2301 and the second sub-unit 2302 are different.

It can be understood that the color of light passing through the first filtering unit 231 is obtained by spatial color mixing of the colors of light passing through the first subunit 2301 and the second subunit 2302 in the first filtering unit 231, the color of light passing through the second filtering unit 232 is obtained by spatial color mixing of the colors of light passing through the first subunit 2301 and the second subunit 2302 in the second filtering unit 232, and the color of light passing through the third filtering unit 233 is obtained by spatial color mixing of the colors of light passing through the first subunit 2301 and the second subunit 2302 in the third filtering unit 233.

In this case, the transmittance of light in the groove 221 may be 1% or less, so that the groove 221 may be visually black and less easily recognized by human eyes.

Alternatively, as shown in fig. 17, the first color, the second color, and the third color are each one of cyan, magenta, and yellow; in the first light filtering unit 231, the color of the organic dye in the first sub-unit 2301 is red, and the color of the organic dye in the second sub-unit 2302 is green; in the second filter unit 232, the color of the organic dye in the first sub-unit 2301 is green, and the color of the organic dye in the second sub-unit 2302 is blue; in the third filtering unit 233, the color of the organic dye in the first sub-unit 2301 is red, and the color of the organic dye in the second sub-unit 2302 is blue; wherein, in the case that the color of the organic dye in any adjacent first sub-unit 2301 is the same, the adjacent first sub-units 2301 are of an integral structure; in the case where the color of the organic dye in any adjacent second sub-unit 2302 is the same, the adjacent second sub-unit 2302 is a unitary structure.

It can be understood that, in the first filter unit 231, the red light passed by the first sub-unit 2301 and the green light passed by the second sub-unit 2302 are spatially mixed, so that the light passed by the first filter unit 231 is cyan. In the second filter unit 232, the green light passed through the first sub-unit 2301 and the blue light passed through the second sub-unit 2302 are spatially mixed, and then the light passed through the second filter unit 232 is magenta. In the third filtering unit 233, the red light passed through the first sub-unit 2301 and the blue light passed through the second sub-unit 2302 are spatially mixed, so that the light passed through the third filtering unit 233 appears yellow.

In this case, the first sub-unit 2301 in the first filter unit 231 and the first sub-unit 2301 in the third filter unit 233 have the same color, and the first sub-unit 2301 in the adjacent first filter unit 231 and the first sub-unit 2301 in the third filter unit 233 are integrated and can be formed simultaneously in terms of process. The colors of the organic dyes in the second sub-unit 2302 in the second light filtering unit 232 and the second sub-unit 2302 in the third light filtering unit 233 are the same, and the second sub-unit 2302 in the second light filtering unit 232 and the second sub-unit 2302 in the third light filtering unit 233 which are adjacent to each other are integrated, so that the organic dyes can be synchronously formed in the process. Thereby simplifying the production steps.

It should be noted that, in the case of ensuring that the color of the light passing through the first, second and

third filter units

231, 232 and 233 is not changed, the color of the organic dye in the first and second sub-units 2301 and 2302 in the first, second and

third filter units

231, 232 and 233 can be adjusted according to the actual production process sequence. For example, in the first filtering unit 231, the colors of the organic dyes in the first sub-unit 2301 and the second sub-unit 2302 are reversed, that is, the color of the organic dye in the first sub-unit 2301 is green, and the color of the organic dye in the second sub-unit 2302 is red. Similarly, in the second filter unit 232, the color of the organic dye in the first sub-unit 2301 is blue, and the color of the organic dye in the second sub-unit 2302 is green; in the third filter unit 233, the color of the organic dye in the first sub-unit 2301 is blue, and the color of the organic dye in the second sub-unit 2302 is red.

The color of the organic dye in the second sub-unit 2302 in the first light filtering unit 231 and the color of the organic dye in the second sub-unit 2302 in the third light filtering unit 233 are the same red, and the second sub-unit 2302 in the adjacent first light filtering unit 231 and the second sub-unit 2302 in the third light filtering unit 233 are integrated. The color of the organic dye in the first sub-unit 2301 in the second filter unit 232 and the first sub-unit 2301 in the third filter unit 233 are blue, and the first sub-unit 2301 in the adjacent second filter unit 232 and the first sub-unit 2301 in the third filter unit 233 are of an integral structure. In terms of process, the second sub-unit 2302 of the adjacent first filtering unit 231 and the second sub-unit 2302 of the third filtering unit 233 may be simultaneously formed, and the first sub-unit 2301 of the adjacent second filtering unit 232 and the first sub-unit 2301 of the third filtering unit 233 may also be simultaneously formed.

On this basis, alternatively, as shown in fig. 18, the black matrix 22 defines a plurality of sub-pixel regions P in the AA region; a plurality of second color filter units 24 are correspondingly arranged in the plurality of sub-pixel regions P one by one; the plurality of second color filter units 24 include a fourth filter unit 241, a fifth filter unit 242, and a sixth filter unit 243; the materials of the fourth, fifth, and

sixth filtering units

241, 242, and 243 each include an organic dye, and the colors of the organic dyes in the fourth, fifth, and

sixth filtering units

241, 242, and 243 are red, green, and blue, respectively.

It is understood that, in the first filtering unit 231, the color of the organic dye in the first sub-unit 2301 is red, and the color of the organic dye in the second sub-unit 2302 is green; in the second filter unit 232, the color of the organic dye in the first sub-unit 2301 is green, and the color of the organic dye in the second sub-unit 2302 is blue; in the third filter unit 233, when the color of the organic dye in the first sub-unit 2301 is red and the color of the organic dye in the second sub-unit 2302 is blue, the color of the organic dye in the first sub-unit 2301 in the first filter unit 231 and the color of the organic dye in the first sub-unit 2301 in the third filter unit 233 are red and the same as the color of the organic dye in the fourth filter unit 241, and thus, the first sub-unit 2301 in the first filter unit 231, the first sub-unit 2301 in the third filter unit 233, and the fourth filter unit 241 may be simultaneously formed. Similarly, the color of the organic dye in the second subunit 2302 of the first filter unit 231 and the color of the organic dye in the first subunit 2301 of the second filter unit 232 are both green and the same as the color of the organic dye in the fifth filter unit 242, so that the second subunit 2302 of the first filter unit 231, the first subunit 2301 of the second filter unit 232, and the fifth filter unit 242 can be simultaneously formed. The color of the organic dye in the second sub-unit 2302 in the second filtering unit 232 and the color of the organic dye in the second sub-unit 2302 in the third filtering unit 233 are both blue, which is the same as the color of the organic dye in the sixth filtering unit 243, and thus the second sub-unit 2302 in the second filtering unit 232, the second sub-unit 2302 in the third filtering unit 233, and the sixth filtering unit 243 may be simultaneously formed. Thereby simplifying the production steps, improving the production efficiency and facilitating the mass production.

The embodiment of the invention also provides a preparation method of the substrate, and the substrate is provided with a display area (AA area) and a peripheral area S. As shown in fig. 19, the method for manufacturing a substrate includes the steps of:

s10, referring to fig. 4 to 5, forming the black matrix 22 on the substrate 21; the black matrix 22 extends from the AA area to the peripheral area S, and surrounds the AA area once in the peripheral area S; the black matrix 22 defines a plurality of subpixel regions P in the AA region; the black matrix 22 has a groove 221 surrounding the AA region by one turn in the peripheral region S, and the groove 221 penetrates the black matrix 22 in the thickness direction of the black matrix 22.

S20, referring to fig. 4 to 5, a plurality of first color filter units 23 are formed in the slot 221, the plurality of first color filter units 23 are sequentially arranged around the slot 221, and any adjacent first color filter units 23 are used for allowing light of different colors to pass through.

It can be understood that any adjacent first color filter units 23 in the slot 221 are used for allowing light of different colors to pass through, that is, there is a difference in color of the adjacent first color filter units 23 in the slot 221, and the light passed by the first color filter units 23 in the slot 221 is spatially mixed, so that the slot 221 is gray overall, does not display any color, and is not easily observed by human eyes.

S30, referring to fig. 4, a plurality of second color filter units 24 are formed in the plurality of sub-pixel regions P in a one-to-one correspondence, and the first color filter units 23 and the second color filter units 24 are formed in synchronization.

It is understood that the material of the first color filter unit 23 is the same as the material of the second color filter unit 24. The first color filter unit 23 and the second color filter unit 24 are formed in synchronization, thereby simplifying the process.

The embodiment of the invention provides a method for preparing a substrate, wherein a groove 221 which surrounds an AA area for a circle is formed in a peripheral area S of a black matrix 22, and the groove 221 penetrates through the black matrix 22 along the thickness direction of the black matrix 22; a plurality of first color filter units 23 are formed in the slot 221, the plurality of first color filter units 23 are sequentially arranged around the slot 221, and any adjacent first color filter units 23 are used for allowing light of different colors to pass through. Compared with the way that the substrate 21 is directly exposed by the open groove 221 (as shown in fig. 7-9), the light is directly emitted from the open groove 221, which causes a large luminance difference between the open groove 221 and the surrounding black matrix 22 to form a transparent white stripe or other color stripes, thereby affecting the display effect.

Moreover, compared with the method of covering the slot 221 with the blue filter 2211 (as shown in fig. 10) or the blue filter 2211 and the red filter 2212 (as shown in fig. 11) having smaller transmittances for passing blue light and red light to reduce the light passing through the slot 221, while reducing the brightness difference between the slot 221 and the black matrix 22 around the slot 221, a serious blue stripe or dark red stripe may appear, in the present invention, any adjacent first color filter 23 in the slot 221 is used for passing light of different colors, spatial color mixing may be performed, so that the slot 221 is gray and does not display any color, thereby reducing the contrast between the slot 221 and the surrounding black matrix 22, making the slot 221 not easily recognized by human eyes, and thus improving the display effect.

Optionally, as shown in fig. 15, 17 and 18, the plurality of first color filter units 23 include at least two of the first filter unit 2321, the second filter unit 232 and the third filter unit 233; the plurality of second color filter units 24 include a fourth filter unit 241, a fifth filter unit 242, and a sixth filter unit 243. As shown in fig. 20, forming the first, second, third, fourth, fifth, and

sixth filtering units

231, 232, 233, 241, 242, and 243 includes:

s40, referring to fig. 18, the first filtering unit 231 and the fourth filtering unit 241 are formed in synchronization; the materials of the first filtering unit 231 and the fourth filtering unit 241 both include organic dyes, and the colors of the organic dyes in the first filtering unit 231 and the fourth filtering unit 241 are both the first color; alternatively, the fourth filtering unit 241 is formed, a material of the fourth filtering unit 241 includes an organic dye, and a color of the organic dye in the fourth filtering unit 241 is the first color.

S50, referring to fig. 18, the second filtering unit 232 and the fifth filtering unit 242 are formed in synchronization; the materials of the second and

fifth filtering units

232 and 242 each include an organic dye, and the colors of the organic dyes in the second and

fifth filtering units

232 and 242 are each a second color.

S60, referring to fig. 18, the third filtering unit 233 and the sixth filtering unit 243 are synchronously formed; the materials of the third and

sixth filtering units

233 and 243 each include an organic dye, and the colors of the organic dyes in the third and

sixth filtering units

233 and 243 are each a third color.

The first color, the second color and the third color are three primary colors.

It is understood that the first and

fourth filter units

231 and 241 may pass the first color light, the second and

fifth filter units

232 and 242 may pass the second color light, and the third and

sixth filter units

233 and 243 may pass the third color light.

It should be noted that the three primary colors may be red, green, and blue, or cyan, magenta, and yellow. That is, the first color, the second color, and the third color may be red, green, and blue, or cyan, magenta, and yellow, respectively.

For example, the organic dye may be a material in which a polymer material and an organic dye are mixed.

The first filter unit 231, the second filter unit 232, and the third filter unit 233 may be sequentially arranged around the slot 221.

Optionally, each first color filter unit 23 at least includes a first sub-unit 2301 and a second sub-unit 2302; forming the plurality of first color filter units 23 includes: referring to fig. 16, a first sub-unit 2301 is formed in the slot 221, a second sub-unit 2302 is formed on the side of the first sub-unit 2301 away from the substrate 21, and the projections of the second sub-unit 2302 and the first sub-unit 2301 on the substrate 21 are coincident; the materials of the first sub-unit 2301 and the second sub-unit 2302 both comprise organic dyes, and the colors of the organic dyes in the first sub-unit 2301 and the second sub-unit 2302 are different.

Optionally, the plurality of first color filter units 23 include a first filter unit 231, a second filter unit 232, and a third filter unit 233; and each of the first color filter units 23 includes a first sub-unit 2301 and a second sub-unit 2302; the plurality of second color filter units 24 include a fourth filter unit 241, a fifth filter unit 242, and a sixth filter unit 243; as shown in fig. 21, forming the first, second, third, fourth, fifth, and

sixth filtering units

231, 232, 233, 241, 242, and 243 includes:

s70, referring to fig. 17 to 18, synchronously forming first sub-cell 2301 in first filtering unit 231, first sub-cell 2301 in third filtering unit 233, and fourth filtering unit 241; the materials of the first sub-unit 2301 in the first filtering unit 231, the first sub-unit 2301 in the third filtering unit 233 and the fourth filtering unit 241 all include organic dyes, and the colors of the organic dyes in the first sub-unit 2301 in the first filtering unit 231, the first sub-unit 2301 in the third filtering unit 233 and the fourth filtering unit 241 are red; as shown in fig. 22, the first sub-unit 2301 in the adjacent first filter unit 231 and the first sub-unit 2301 in the third filter unit 233 are of an integral structure.

S80, referring to fig. 17-18, the second sub-cell 2302 in the first filtering unit 231, the first sub-cell 2301 in the second filtering unit 232, and the fifth filtering unit 242 are formed in synchronization; the materials of the second sub-unit 2302 of the first filtering unit 231, the first sub-unit 2301 of the second filtering unit 232 and the fifth filtering unit 242 all include organic dyes, and the colors of the organic dyes in the second sub-unit 2302 of the first filtering unit 231, the first sub-unit 2301 of the second filtering unit 232 and the fifth filtering unit 242 are green.

S90, referring to fig. 17 to 18, the second sub-unit 2302 in the second filtering unit 232, the second sub-unit 2302 in the third filtering unit 233, and the sixth filtering unit 243 are formed in synchronization; the materials of the second sub-unit 2302 in the second light filtering unit 232, the second sub-unit 2302 in the third light filtering unit 233 and the sixth light filtering unit 243 all comprise organic dyes, and the colors of the organic dyes in the second sub-unit 2302 in the second light filtering unit 232, the second sub-unit 2302 in the third light filtering unit 233 and the sixth light filtering unit 243 are blue; as shown in fig. 22, the second sub-unit 2302 of the adjacent second filter unit 232 and the second sub-unit 2302 of the third filter unit 233 are of an integrated structure.

An inkjet printing process may be adopted, as shown in fig. 22, a first sub-unit 2301 in the first filtering unit 231 and a first sub-unit 2301 in the third filtering unit 233 are synchronously formed in the slot 221, and the first sub-unit 2301 in the adjacent first filtering unit 231 and the first sub-unit 2301 in the third filtering unit 233 are in an integral structure; then, the second sub-unit 2302 of the first light filtering unit 231 and the first sub-unit 2301 of the second light filtering unit 232 are synchronously formed, and then the second sub-unit 2302 of the second light filtering unit 232 and the second sub-unit 2302 of the third light filtering unit 233 are synchronously formed, and the second sub-unit 2302 of the adjacent second light filtering unit 232 and the second sub-unit 2302 of the third light filtering unit 233 are integrally formed.

Alternatively, a material for passing red light may be coated on the substrate 21, a thin film for passing red light may be formed, and the uncured material for passing red light may be removed through exposure, development, and curing, resulting in the first sub-unit 2301 in the first filter unit 231, the first sub-unit 2301 in the third filter unit 233, and the fourth filter unit 241; then, a material for passing green light is coated on the substrate 21, a thin film for passing green light is formed, and the uncured thin film for passing green light is removed through exposure, development and curing, so that the second sub-unit 2302 in the first filter unit 231, the first sub-unit 2301 in the second filter unit 232 and the fifth filter unit 242 are obtained; after that, a material for passing green light is coated on the substrate 21, a thin film for passing blue light is formed, and the uncured thin film for passing blue light is removed through exposure, development and curing, thereby obtaining the first sub-unit 2301 in the first filter unit 231, the first sub-unit 2301 in the third filter unit 233, and the fourth filter unit 241.

It can be understood that, in the first filter unit 231, the red light passed by the first sub-unit 2301 and the green light passed by the second sub-unit 2302 are spatially mixed, so that the light passed by the first filter unit 231 is cyan. In the second filter unit 232, the green light passed through the first sub-unit 2301 and the blue light passed through the second sub-unit 2302 are spatially mixed, and then the light passed through the second filter unit 232 is magenta. In the third filter unit 233, the red light passed through the first sub-unit 2301 and the blue light passed through the second sub-unit 2302 are spatially mixed so that the light passed through the third filter unit 233 becomes yellow light.

It should be noted that the colors of the organic dyes in the first sub-unit 2301 and the second sub-unit 2302 of the first filter unit 231, the second filter unit 232 and the third filter unit 233 may be adjusted according to the actual production process sequence. For example, in the first filtering unit 231, the colors of the organic dyes in the first sub-unit 2301 and the second sub-unit 2302 are reversed, that is, the color of the organic dye in the first sub-unit 2301 is green, and the color of the organic dye in the second sub-unit 2302 is red. Similarly, in the second filter unit 232, the color of the organic dye in the first sub-unit 2301 is blue, and the color of the organic dye in the second sub-unit 2302 is green; in the third filter unit 233, the color of the organic dye in the first sub-unit 2301 is blue, and the color of the organic dye in the second sub-unit 2302 is red.

On this basis, the color of the organic dye in the second sub-unit 2302 in the first optical filtering unit 231 and the color of the organic dye in the second sub-unit 2302 in the third optical filtering unit 233 are the same red, the second sub-unit 2302 in the first optical filtering unit 231, the second sub-unit 2302 in the third optical filtering unit 233, and the fourth optical filtering unit 241 can be synchronously formed, and the second sub-unit 2302 in the adjacent first optical filtering unit 231 and the second sub-unit 2302 in the third optical filtering unit 233 are integrated. The color of the organic dye in the first sub-unit 2301 in the second filter unit 232 and the first sub-unit 2301 in the third filter unit 233 are blue, the first sub-unit 2301 in the second filter unit 232, the first sub-unit 2301 in the third filter unit 233, and the sixth filter unit 243 may be formed simultaneously, and the first sub-unit 2301 in the adjacent second filter unit 232 and the first sub-unit 2301 in the third filter unit 233 are of an integral structure.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A substrate is characterized in that the substrate is provided with a display area and a peripheral area;

the substrate includes: the black matrix is arranged on the substrate; the black matrix extends from the display area to the peripheral area and surrounds the display area for one circle in the peripheral area;

the black matrix is provided with a groove which surrounds the display area by one circle in the peripheral area, and the groove penetrates through the black matrix along the thickness direction of the black matrix;

a plurality of first color filter units are arranged in the groove, the first color filter units are sequentially arranged around the groove, and the first color filter units are randomly adjacent and used for enabling light with different colors to pass through.

2. The substrate according to claim 1, wherein the plurality of first color filter units includes at least two of a first filter unit, a second filter unit, and a third filter unit;

the first filter unit is used for enabling first color light to pass, the second filter unit is used for enabling second color light to pass, and the third filter unit is used for enabling third color light to pass.

3. The substrate of claim 2, wherein the first color, the second color, and the third color are three primary colors.

4. The substrate according to claim 3, wherein the plurality of first color filter units includes a first filter unit, a second filter unit, and a third filter unit;

the first light filtering unit, the second light filtering unit and the third light filtering unit are sequentially arranged around the slot.

5. The substrate according to any one of claims 1 to 4, wherein each of the first color filter units comprises a first sub-unit and a second sub-unit;

the second subunit is positioned on one side of the first subunit, which is far away from the substrate, and orthographic projections of the second subunit and the first subunit on the substrate are superposed;

the materials of the first subunit and the second subunit both comprise organic dyes, and the colors of the organic dyes in the first subunit and the second subunit are different.

6. The substrate of claim 5, wherein the first, second, and third colors are each one of cyan, magenta, and yellow;

in the first light filtering unit, the color of the organic dye in the first subunit is red, and the color of the organic dye in the second subunit is green;

in the second light filtering unit, the color of the organic dye in the first subunit is green, and the color of the organic dye in the second subunit is blue;

in the third filtering unit, the color of the organic dye in the first subunit is red, and the color of the organic dye in the second subunit is blue;

wherein, under the condition that the color of the organic dye in any adjacent first subunit is the same, the adjacent first subunits are of an integral structure; in the case that the color of the organic dye in any adjacent second subunit is the same, the adjacent second subunits are of an integral structure.

7. The substrate of claim 1, wherein the length of the first color filter unit is equal to or less than 100 μm in a direction perpendicular to the width direction of the slot.

8. The substrate of claim 3, wherein the black matrix defines a plurality of sub-pixel regions in the display region;

a plurality of second color filtering units are correspondingly arranged in the sub-pixel areas one by one; the plurality of second color filter units comprise a fourth filter unit, a fifth filter unit and a sixth filter unit;

the materials of the fourth filtering unit, the fifth filtering unit and the sixth filtering unit all comprise organic dyes, and the colors of the organic dyes in the fourth filtering unit, the fifth filtering unit and the sixth filtering unit are respectively a first color, a second color and a third color; the colors of the organic dyes in the first light filtering unit, the second light filtering unit and the third light filtering unit are respectively a first color, a second color and a third color.

9. The substrate of claim 6, wherein the black matrix defines a plurality of sub-pixel regions in the display region;

the materials of the fourth light filtering unit, the fifth light filtering unit and the sixth light filtering unit all comprise organic dyes, and the colors of the organic dyes in the fourth light filtering unit, the fifth light filtering unit and the sixth light filtering unit are respectively red, green and blue.

10. A display panel comprising the substrate according to any one of claims 1 to 9.

11. The preparation method of the substrate is characterized in that the substrate is provided with a display area and a peripheral area;

the preparation method of the substrate comprises the following steps:

forming a black matrix on a substrate; the black matrix extends from the display area to the peripheral area and surrounds the display area for one circle in the peripheral area; the black matrix defines a plurality of sub-pixel regions in the display region; the black matrix is provided with a groove which surrounds the display area for one circle in the peripheral area, and the groove penetrates through the black matrix along the thickness direction of the black matrix;

forming a plurality of first color filter units in the slot, wherein the first color filter units are sequentially arranged around the slot, and any adjacent first color filter units are used for allowing light with different colors to pass through;

and a plurality of second color filtering units are formed in the sub-pixel areas in a one-to-one correspondence mode, and the first color filtering units and the second color filtering units are formed synchronously.

12. The method of manufacturing a substrate according to claim 11, wherein the plurality of first color filter units includes at least two of a first filter unit, a second filter unit, and a third filter unit; the plurality of second color filter units comprise a fourth filter unit, a fifth filter unit and a sixth filter unit;

the step of forming at least two of the first filtering unit, the second filtering unit, and the third filtering unit, and the fourth filtering unit, the fifth filtering unit, and the sixth filtering unit includes:

synchronously forming the first light filtering unit and the fourth light filtering unit, wherein the materials of the first light filtering unit and the fourth light filtering unit both comprise organic dyes, and the colors of the organic dyes in the first light filtering unit and the fourth light filtering unit are first colors; or, forming the fourth filtering unit, where a material of the fourth filtering unit includes an organic dye, and a color of the organic dye in the fourth filtering unit is a first color;

synchronously forming the second filtering unit and the fifth filtering unit; the materials of the second light filtering unit and the fifth light filtering unit both comprise organic dyes, and the colors of the organic dyes in the second light filtering unit and the fifth light filtering unit are both second colors;

synchronously forming the third filtering unit and the sixth filtering unit; the materials of the third light filtering unit and the sixth light filtering unit both comprise organic dyes, and the colors of the organic dyes in the third light filtering unit and the sixth light filtering unit are third colors;

the first color, the second color and the third color are three primary colors.

13. The method of claim 11, wherein each of the first color filter units comprises at least a first sub-unit and a second sub-unit;

forming a plurality of the first color filter units includes:

forming the first subunit in the open groove, forming the second subunit on the side, away from the substrate, of the first subunit, and enabling projections of the second subunit and the first subunit on the substrate to be coincident; the materials of the first subunit and the second subunit both comprise organic dyes, and the colors of the organic dyes in the first subunit and the second subunit are different.

14. The method for producing a substrate according to claim 13,

the plurality of first color filter units comprise a first filter unit, a second filter unit and a third filter unit; each first color filter unit comprises a first subunit and a second subunit; the plurality of second color filter units comprise a fourth filter unit, a fifth filter unit and a sixth filter unit;

forming the first, second, third, fourth, fifth, and sixth filtering units includes:

synchronously forming the first subunit in the first filtering unit, the first subunit in the third filtering unit and the fourth filtering unit; the materials of the first subunit in the first light filtering unit, the first subunit in the third light filtering unit and the fourth light filtering unit all comprise organic dyes, and the colors of the organic dyes in the first subunit in the first light filtering unit, the first subunit in the third light filtering unit and the fourth light filtering unit are red; the first sub-unit in the first filtering unit and the first sub-unit in the third filtering unit are adjacent to each other and are of an integral structure;

synchronously forming the second subunit in the first light filtering unit, the first subunit in the second light filtering unit and the fifth light filtering unit; the materials of the second subunit in the first light filtering unit, the first subunit in the second light filtering unit and the fifth light filtering unit all comprise organic dyes, and the colors of the organic dyes in the second subunit in the first light filtering unit, the first subunit in the second light filtering unit and the fifth light filtering unit are green;

synchronously forming the second subunit in the second filtering unit, the second subunit in the third filtering unit and the sixth filtering unit; the materials of the second subunit in the second light filtering unit, the second subunit in the third light filtering unit and the sixth light filtering unit all comprise organic dyes, and the colors of the organic dyes in the second subunit in the second light filtering unit, the second subunit in the third light filtering unit and the sixth light filtering unit are blue; the second sub-unit in the second filtering unit and the second sub-unit in the third filtering unit are adjacent to each other and are of an integral structure.