Display substrate, preparation method of display substrate and display device

Abstract

The invention provides a display substrate, a preparation method of the display substrate and a display device. The display substrate comprises a substrate; a driving circuit layer; the light-emitting units comprise a first light-emitting unit, a second light-emitting unit and a third light-emitting unit; the color resistance layer is arranged on the side, close to the substrate, of the light emitting unit, and the color resistance layer comprises a first color resistance, a second color resistance and a third color resistance; the shading structure comprises a first shading structure and / or a second shading structure, the first shading structure is arranged on the side faces of the first color resistor, the second color resistor and / or the third color resistor and forms a fence surrounding the side faces, and the second shading structure is arranged on the side faces of the first color resistor, the second color resistor and / or the third color resistor. The second shading structure is arranged on the surface, close to the light emitting unit, of the first color resistor, the second color resistor and / or the third color resistor and forms a protrusion surrounding the edge of the surface. Light crosstalk of the display substrate can be avoided, and the display effect is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of display technology, and in particular to a display substrate, a method for preparing the display substrate, and a display device. Background Art

[0002] OLED (Organic Light Emitting Diode) screens have the advantages of self-luminescence, high contrast and low power consumption. They have been widely used in mobile phones, wearable devices, tablet devices and other scenarios.

[0003] The color films (such as color resists) of various colors on the OLED display substrate are coplanar, so that the light emitted by a light-emitting unit of a certain color will cause light crosstalk to the light emitted by an adjacent light-emitting unit of another color, causing color point shift and color unevenness of the display substrate, resulting in poor display effect. Summary of the invention

[0004] Embodiments of the present invention provide a display substrate, a method for preparing the display substrate, and a display device to solve the problem that light emitted by a light-emitting unit of a certain color on an existing display substrate causes light crosstalk to light emitted by an adjacent light-emitting unit of another color, resulting in color point shift and poor color unevenness of the display substrate and poor display effect.

[0005] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0006] In a first aspect, an embodiment of the present invention provides a display substrate, comprising:

[0007] substrate substrate;

[0008] A driving circuit layer, disposed on the base substrate, comprising a plurality of pixel driving circuits;

[0009] A light-emitting unit, arranged on a side of the driving circuit layer away from the base substrate, comprising a first light-emitting unit, a second light-emitting unit and a third light-emitting unit; the first light-emitting unit is used to emit light of a first wavelength, the second light-emitting unit is used to emit light of a second wavelength, and the third light-emitting unit is used to emit light of a third wavelength;

[0010] A color resist layer is arranged on a side of the light emitting unit close to the base substrate, the color resist layer comprises: a first color resist, a second color resist and a third color resist; the first color resist is used to filter out light except the light of the first wavelength, the second color resist is used to filter out light except the light of the second wavelength, and the third color resist is used to filter out light except the light of the third wavelength;

[0011] The shading structure includes a first shading structure and / or a second shading structure, wherein the first shading structure is arranged on the side of the first color resist, the second color resist and / or the third color resist and is formed as a barrier surrounding the side, and the second shading structure is arranged on the surface of the first color resist, the second color resist and / or the third color resist close to the light-emitting unit and is formed as a protrusion arranged around the edge of the surface.

[0012] Optionally, the first light shielding structure is disposed on the periphery of the side surfaces of the first color block and the second color block;

[0013] The first light shielding structure disposed on the side periphery of the first color resist is disposed in the same layer and material as the third color resist;

[0014] and / or

[0015] The first light shielding structure disposed on the side periphery of the second color resist is disposed in the same layer and made of the same material as the first color resist.

[0016] Optionally, the second light shielding structure is provided on the surface edge of the first color resistance and the second color resistance close to the light emitting unit;

[0017] The material of the second light shielding structure disposed near the surface edge of the light-emitting unit of the first color resist is the same as the material of the first color resist;

[0018] and / or

[0019] The material used for the second light shielding structure disposed near the surface edge of the second color resist and the material used for the second color resist are the same.

[0020] Optionally, a distance between the third color resist and the third light emitting unit is smaller than a distance between the first color resist and the first light emitting unit, and smaller than a distance between the second color resist and the second light emitting unit.

[0021] Optionally, the first light emitting unit is a red light emitting unit, the second light emitting unit is a green light emitting unit, and the third light emitting unit is a blue light emitting unit.

[0022] In a second aspect, an embodiment of the present invention provides a method for preparing a display substrate, comprising:

[0023] providing a substrate base plate;

[0024] A driving circuit layer is formed on the base substrate, wherein the driving circuit layer includes a plurality of pixel driving circuits;

[0025] A color resist layer and a light shielding structure are formed on a side of the driving circuit layer away from the base substrate, the color resist layer comprising: a first color resist, a second color resist and a third color resist; the first color resist is used to filter out light except light of the first wavelength, the second color resist is used to filter out light except light of the second wavelength, and the third color resist is used to filter out light except light of the third wavelength; the light shielding structure comprises a first light shielding structure and / or a second light shielding structure, the first light shielding structure is arranged on the side of the first color resist, the second color resist and / or the third color resist and is formed as a fence surrounding the side, and the second light shielding structure is arranged on the surface of the first color resist, the second color resist and / or the third color resist close to the light emitting unit and is formed as a protrusion arranged around the edge of the surface;

[0026] The light-emitting unit is formed on the side of the color resist layer away from the base substrate, and the light-emitting unit includes a first light-emitting unit, a second light-emitting unit and a third light-emitting unit; the first light-emitting unit is used to emit light of the first wavelength, the second light-emitting unit is used to emit light of the second wavelength, and the third light-emitting unit is used to emit light of the third wavelength.

[0027] Optionally, a color resist layer and a light shielding structure are formed on a side of the driving circuit layer away from the base substrate, including:

[0028] forming a third color block, and forming a first shielding structure for the first color block at the periphery of the region for forming the first color block;

[0029] forming a first color resist, and forming a first shielding structure for the second color resist at the periphery of the region for forming the second color resist;

[0030] A second color resist is formed.

[0031] Optionally, a color resist layer and a light shielding structure are formed on a side of the driving circuit layer away from the base substrate, including:

[0032] Forming a third color barrier;

[0033] forming a first color block and forming a second light shielding structure for the first color block at a surface edge of the first color block close to the light-emitting unit;

[0034] A second color resist is formed, and a second light shielding structure for the second color resist is formed on a surface edge of the second color resist close to the light emitting unit.

[0035] Optionally, before forming a light-emitting unit on a side of the color-resist layer away from the base substrate, the method further includes:

[0036] An insulating layer is formed on the side of the color block layer and the light shading structure away from the base substrate, and a plurality of non-through holes are formed on the insulating layer, wherein the depth of the non-through holes corresponding to the third color block is greater than the depth of the non-through holes corresponding to the first color block and the second color block, so that after the light-emitting unit is formed, the distance between the third color block and the third light-emitting unit is smaller than the distance between the first color block and the first light-emitting unit, and the distance between the second color block and the second light-emitting unit.

[0037] In a third aspect, an embodiment of the present invention provides a display device, comprising a display substrate as described in any one of the first aspects.

[0038] In an embodiment of the present invention, a shading structure is provided, including a first shading structure and / or a second shading structure. The first shading structure is provided on the side of the first color resist, the second color resist and / or the third color resist and is formed as a barrier surrounding the side. The second shading structure is provided on the surface of the first color resist, the second color resist and / or the third color resist close to the light-emitting unit and is formed as a protrusion provided around the edge of the surface. This can avoid light crosstalk on the display substrate and improve the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0040] Figure 1 A schematic diagram showing the structure of a substrate according to an embodiment of the present invention;

[0041] Figure 2 A schematic diagram showing a process of preparing a substrate according to an embodiment of the present invention;

[0042] Figure 3 This is one of the structural schematic diagrams showing the substrate during the preparation process according to an embodiment of the present invention;

[0043] Figure 4 The second structural schematic diagram showing the substrate during the preparation process according to the embodiment of the present invention;

[0044] Figure 5 This is the third structural schematic diagram showing the substrate during the preparation process according to the embodiment of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0047] In the technical solution of the present disclosure, words such as “connect”, “couple” or “connected” are not limited to physical or mechanical connections, but may include electrical connections.

[0048] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0049] An embodiment of the present invention provides a display substrate, see Figure 1 As shown, including:

[0050] Base substrate 100;

[0051] The driving circuit layer is arranged on the base substrate 100 and includes a plurality of pixel driving circuits 201 (the pixel driving circuit 201 generally includes a plurality of thin film transistors and capacitors, and only a part of the pixel driving circuit 201 is shown in the figure);

[0052] The light-emitting unit 300 is disposed on a side of the driving circuit layer away from the base substrate 100, and includes a first light-emitting unit 301, a second light-emitting unit 302 and a third light-emitting unit 303; the first light-emitting unit 301 is used to emit light of a first wavelength, the second light-emitting unit 302 is used to emit light of a second wavelength, and the third light-emitting unit 303 is used to emit light of a third wavelength;

[0053] The color resist layer 400 is disposed on a side of the light emitting unit 300 close to the base substrate 100. The color resist layer 400 includes: a first color resist 401, a second color resist 402, and a third color resist 403. The first color resist 401 is used to filter out light except the light of the first wavelength, the second color resist 402 is used to filter out light except the light of the second wavelength, and the third color resist 403 is used to filter out light except the light of the third wavelength.

[0054] The shading structure 500 includes a first shading structure and / or a second shading structure. The first shading structure is arranged on the side of the first color resist 401, the second color resist 402 and / or the third color resist 403 and is formed as a barrier 501 surrounding the side. The second shading structure is arranged on the surface of the first color resist 401, the second color resist 402 and / or the third color resist 403 close to the light-emitting unit 300 and is formed as a protrusion 502 arranged around the edge of the surface.

[0055] Specifically, see the embodiments of the present invention. Figure 1 As shown, the driving circuit layer includes a buffer layer 202, a first insulating layer 203, a source and drain electrode 204, and a passivation layer 205 which are arranged on the base substrate 100 and stacked in sequence toward the side away from the base substrate 100. The pixel driving circuit 201 includes: a thin film transistor 2011.

[0056] The light-emitting unit 300 includes an anode line 2012, an EL (Electroluminescence) layer 2014, and a cathode line 2015, which are sequentially arranged on the side of the driving circuit layer away from the base substrate. The display substrate also includes a PDL layer (Pixel Define Layer) 2013, which is used to define the areas where different light-emitting units are located.

[0057] An insulating layer 206 is further disposed on the side of the color resist layer 400 facing away from the base substrate 100 , that is, the insulating layer 206 is located between the color resist layer 400 and the light emitting unit 300 .

[0058] In practical applications, when the first light-emitting unit 301, the second light-emitting unit 302 and the third light-emitting unit 303 emit light, the light of the first wavelength, the light of the second wavelength and the light of the third wavelength are all emitted radially to the surroundings of the corresponding light-emitting units. Taking the first light-emitting unit 301 as an example, after the light of the first wavelength emitted by it enters the first color block 401, the first color block 401 filters out the other light except the light of the first wavelength, thereby forming a display optical path of the light of the first wavelength from the first light-emitting unit 301, the first color block 401 to the substrate 100; further, along the display optical path, the light of the first wavelength is emitted in the direction close to the substrate 100, and finally passes through the substrate 100 and is emitted to the outside of the substrate 100 to achieve display. In the above process, since the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength are all emitted radially to the surroundings of their respective corresponding light-emitting units, the light of the second wavelength and the light of the third wavelength inevitably pass through the gaps between the color blocks and enter the display optical path of the light of the first wavelength, and mix with the light of the first wavelength, resulting in the light of the first wavelength emitted through the base substrate 100 to the outside of the base substrate 100 actually mixed with the light of the second wavelength and the light of the third wavelength, that is, light crosstalk is formed. Light crosstalk reduces the display effect of the light of the first wavelength. The principle of light crosstalk on the second light-emitting unit 302 and the third light-emitting unit 303 is the same, and will not be repeated here.

[0059] Based on this, an embodiment of the present invention provides a shading structure 500, including a first shading structure and / or a second shading structure. The first shading structure is arranged on the side of the first color block 401, the second color block 402 and / or the third color block 403 and is formed as a barrier 501 surrounding the side. The second shading structure is arranged on the surface of the first color block 401, the second color block 402 and / or the third color block 403 close to the light-emitting unit 300 and is formed as a protrusion 502 arranged around the edge of the surface. This can prevent the display optical path of light of one wavelength from entering the light of other two wavelengths, avoid crosstalk between the three wavelengths of light, and improve the display effect.

[0060] In the embodiment of the present invention, by setting a shading structure 500, including a first shading structure and / or a second shading structure, the first shading structure is arranged on the side of the first color block 401, the second color block 402 and / or the third color block 403 and is formed as a fence 501 surrounding the side, and the second shading structure is arranged on the surface of the first color block 401, the second color block 402 and / or the third color block 403 close to the light-emitting unit 300 and is formed as a protrusion 502 arranged around the edge of the surface, it is possible to avoid light crosstalk of the display substrate and improve the display effect. In addition, since the thin film transistor is affected by light, avoiding light crosstalk also reduces the interference of light on the thin film transistor.

[0061] In some embodiments of the present invention, optionally, a first light shielding structure is disposed on the periphery of the side of the first color resist 401 and the second color resist 402;

[0062] The first light shielding structure disposed on the side periphery of the first color resist 401 is disposed in the same layer and the same material as the third color resist 403 ;

[0063] and / or

[0064] The first light shielding structure disposed on the side periphery of the second color resist 402 is disposed in the same layer and made of the same material as the first color resist 401 .

[0065] Specifically, see the embodiments of the present invention. Figure 1 As shown, the side peripheries of the first color resist 401 and the second color resist 402 are provided with enclosures 501; the side peripheries of the first color resist 401 are in the same layer as the third color resist 403 and are made of the same material, and can be formed by a single patterning process; the side peripheries of the second color resist 402 are in the same layer as the first color resist 401 and are made of the same material, and can be formed by a single patterning process.

[0066] In the embodiment of the present invention, a first light shielding structure is disposed on the periphery of the side of the first color block 401 and the second color block 402, which can avoid crosstalk between the three wavelengths of light and improve the display effect. In particular, it can avoid the third wavelength of light emitted by the third light-emitting unit 303 from crosstalking with the second wavelength of light emitted by the first light-emitting unit 301, and avoid the third wavelength of light emitted by the third light-emitting unit 303 from crosstalking with the second wavelength of light emitted by the second light-emitting unit 302.

[0067] In the embodiment of the present invention, the first light-shielding structure arranged on the side periphery of the first color resist 401 is arranged on the same layer and the same material as the third color resist 403; and / or the first light-shielding structure arranged on the side periphery of the second color resist 402 is arranged on the same layer and the same material as the first color resist 401, so that the first light-shielding structure arranged on the side periphery of the first color resist 401 can be formed in the process of forming the third color resist 403, and / or the first light-shielding structure arranged on the side periphery of the second color resist 402 can be formed in the process of forming the first color resist 401, which is conducive to simplifying the process flow and improving the manufacturing efficiency of the display substrate.

[0068] In some embodiments of the present invention, optionally, a second light shielding structure is provided at the surface edge of the first color resist 401 and the second color resist 402 close to the light emitting unit 300;

[0069] The material of the second light shielding structure disposed on the surface edge of the first color resist 401 close to the light emitting unit 300 is the same as that of the first color resist 401 ;

[0070] and / or

[0071] The material of the second light shielding structure disposed on the surface edge of the second color resist 402 close to the light emitting unit 300 is the same as the material of the second color resist 402 .

[0072] Specifically, see the embodiments of the present invention. Figure 1 As shown, the first color resist 401 and the second color resist 402 are provided with protrusions 502 on the surface edges close to the light-emitting unit 300 , and the protrusions 502 provided on the first color resist 401 are made of the same material as the first color resist 401 , and the protrusions 502 provided on the second color resist 402 are made of the same material as the second color resist 402 .

[0073] In the embodiment of the present invention, a second shading structure is provided at the surface edge of the first color resist 401 and the second color resist 402 close to the light emitting unit 300, so as to further prevent the first wavelength light emitted by the first light emitting unit 301 from being cross-interfered by the third wavelength light emitted by the third light emitting unit 303, and further prevent the second wavelength light emitted by the second light emitting unit 302 from being cross-interfered by the third wavelength light emitted by the third light emitting unit 303, thereby improving the display effect.

[0074] In an embodiment of the present invention, the material used for the second light-shielding structure disposed on the surface edge of the first color resist 401 close to the light-emitting unit 300 is the same as the material used for the first color resist 401; and / or the material used for the second light-shielding structure disposed on the surface edge of the second color resist 402 close to the light-emitting unit 300 is the same as the material used for the second color resist 402. The second light-shielding structure disposed on the first color resist 401 can be formed in the process of forming the first color resist 401, and / or the second light-shielding structure disposed on the second color resist 402 can be formed in the process of forming the second color resist 402, which is beneficial to simplifying the process flow and improving the manufacturing efficiency of the display substrate.

[0075] In some embodiments of the present invention, optionally, see Figure 1 As shown, the distance between the third color resist 403 and the third light emitting unit 303 is smaller than that between the first color resist 401 and the first light emitting unit 301, and smaller than that between the second color resist 402 and the second light emitting unit 302. The above arrangement can increase the exposure of the third light emitting unit 303 to the third color resist 403, thereby reducing the reflection of the third wavelength of light to the first wavelength of light and the second wavelength of light, thereby reducing light crosstalk and improving the display effect.

[0076] In some embodiments of the present invention, optionally, the first light-emitting unit 301 is a red light-emitting unit, the second light-emitting unit 302 is a green light-emitting unit, and the third light-emitting unit 303 is a blue light-emitting unit.

[0077] It should be noted that the first light-emitting unit 301 is a red light-emitting unit, that is, the first wavelength is in the wavelength range of red light; the second light-emitting unit 302 is a green light-emitting unit, that is, the second wavelength is in the wavelength range of green light; the third light-emitting unit 303 is a green light-emitting unit, that is, the third wavelength is in the wavelength range of blue light. In fact, compared with red light and green light, the wavelength of blue light is shorter and it is easier to cause crosstalk to red light and green light. The embodiment of the present invention can effectively reduce the crosstalk of blue light to red light and green light by setting the first shading structure and the second shading structure, thereby improving the display effect.

[0078] It should be noted that, in some optional embodiments of the present invention, the distance between the third color resist 403 and the third light-emitting unit 303 is smaller than the distance between the first color resist 401 and the first light-emitting unit 301, and smaller than the distance between the second color resist 402 and the second light-emitting unit 302. In the above embodiment, the first light-emitting unit 301 is a red light-emitting unit, the second light-emitting unit 302 is a green light-emitting unit, and the third light-emitting unit 303 is a blue light-emitting unit, which can effectively reduce the reflection of blue light to red light and green light, reduce light crosstalk, and improve the display effect.

[0079] The present invention provides a method for preparing a display substrate. Figure 2 As shown, including:

[0080] Step S11: providing a substrate;

[0081] Step S12: forming a driving circuit layer on the base substrate, wherein the driving circuit layer includes a plurality of pixel driving circuits;

[0082] Step S13: forming a color-resist layer and a light-shielding structure on a side of the driving circuit layer away from the base substrate, the color-resist layer comprising: a first color-resist, a second color-resist and a third color-resist; the first color-resist is used to filter out light except light of the first wavelength, the second color-resist is used to filter out light except light of the second wavelength, and the third color-resist is used to filter out light except light of the third wavelength; the light-shielding structure comprises a first light-shielding structure and / or a second light-shielding structure, the first light-shielding structure is arranged on the side of the first color-resist, the second color-resist and / or the third color-resist and is formed as a fence surrounding the side, and the second light-shielding structure is arranged on the surface of the first color-resist, the second color-resist and / or the third color-resist close to the light-emitting unit and is formed as a protrusion arranged around the edge of the surface;

[0083] Step S14: forming a light-emitting unit on the side of the color resist layer away from the base substrate, the light-emitting unit comprising a first light-emitting unit, a second light-emitting unit and a third light-emitting unit; the first light-emitting unit is used to emit light of a first wavelength, the second light-emitting unit is used to emit light of a second wavelength, and the third light-emitting unit is used to emit light of a third wavelength.

[0084] Specifically, see the embodiments of the present invention. Figure 1 , Figures 3 to 5 As shown, the preparation method comprises:

[0085] Providing a substrate 100;

[0086] A driving circuit layer is formed on the base substrate 100, and the driving circuit layer includes a plurality of pixel driving circuits; Figure 1 As shown, the driving circuit layer includes a buffer layer 202, a first insulating layer 203, a source and drain electrode 204, and a passivation layer 205 which are arranged on the base substrate 100 and stacked in sequence toward the side away from the base substrate 100. The pixel driving circuit 201 includes: a thin film transistor 2011.

[0087] After that, see Figure 3 As shown, a color resist layer 400 and a light shielding structure 500 are formed on the side of the driving circuit layer away from the base substrate, and the color resist layer 400 includes: a first color resist 401, a second color resist 402 and a third color resist 403; the first color resist 401 is used to filter out light except the light of the first wavelength, the second color resist 402 is used to filter out light except the light of the second wavelength, and the third color resist 403 is used to filter out light except the light of the third wavelength; the light shielding structure 500 includes a first light shielding structure and / or a second light shielding structure, the first light shielding structure is arranged on the side of the first color resist 401, the second color resist 402 and / or the third color resist 403 and is formed as a fence 501 surrounding the side, and the second light shielding structure is arranged on the surface of the first color resist 401, the second color resist 402 and / or the third color resist 403 close to the light-emitting unit and is formed as a protrusion 502 arranged around the edge of the surface.

[0088] Then, see Figure 1 , Figure 4 and Figure 5 As shown, the light-emitting unit 300 is formed on the side of the color resist layer 400 away from the base substrate 100. Specifically, an insulating layer 206 is formed on the side of the color resist layer 400 away from the base substrate 100, and a plurality of non-through holes 11 are formed on the insulating layer 206. The first color resist 401, the second color resist 402 and the third color resist 403 correspond to a non-through hole 11 respectively. Further, the anode line 2012, the PDL layer 2013, the EL layer 2014 and the cathode line 2015 are sequentially arranged on the side of the insulating layer 206 away from the base substrate. The anode line 2012, the EL layer 2014 and the cathode line 2015 are combined to form the light-emitting unit 300. The PDL layer 2013 is used to define the areas where different light-emitting units are located.

[0089] In an embodiment of the present invention, a color resist layer and a light shielding structure are formed on a side of the driving circuit layer away from the base substrate, the color resist layer includes: a first color resist, a second color resist and a third color resist; the first color resist is used to filter out light except the light of the first wavelength, the second color resist is used to filter out light except the light of the second wavelength, and the third color resist is used to filter out light except the light of the third wavelength; the light shielding structure includes a first light shielding structure and / or a second light shielding structure, the first light shielding structure is arranged on the side of the first color resist, the second color resist and / or the third color resist and is formed as a fence surrounding the side, and the second light shielding structure is arranged on the surface of the first color resist, the second color resist and / or the third color resist close to the light emitting unit and is formed as a protrusion arranged around the edge of the surface. In this embodiment of the present invention, the display optical path of light of one wavelength can be prevented from entering the light of the other two wavelengths, and the crosstalk between the three wavelengths can be avoided, thereby improving the display effect.

[0090] In some embodiments of the present invention, optionally, a color resist layer and a light shielding structure are formed on a side of the driving circuit layer away from the base substrate, including:

[0091] forming a third color block, and forming a first blocking structure for the first color block at the periphery of the region for forming the first color block;

[0092] forming a first color resist, and forming a first shielding structure for the second color resist at the periphery of the region for forming the second color resist;

[0093] A second color resist is formed.

[0094] Specifically, see the embodiments of the present invention. Figure 1 As shown, a barrier 501 is provided on the side periphery of the first color block 401 and the second color block 402. The display substrate obtained in the embodiment of the present invention can avoid crosstalk between the three wavelengths of light and improve the display effect. In particular, the display substrate obtained in the embodiment of the present invention can prevent the third wavelength of light emitted by the third light-emitting unit 303 from crosstalking with the second wavelength of light emitted by the first light-emitting unit 301, and prevent the third wavelength of light emitted by the third light-emitting unit 303 from crosstalking with the second wavelength of light emitted by the second light-emitting unit 302.

[0095] In some embodiments of the present invention, optionally, a first light shielding structure disposed on the periphery of the side of the first color resist is disposed in the same layer and the same material as the third color resist;

[0096] and / or

[0097] The first light shielding structure disposed on the side periphery of the second color resist is disposed in the same layer and material as the first color resist.

[0098] Specifically, see the embodiments of the present invention. Figure 1 , Figures 3 to 5As shown, the enclosure 501 set on the side periphery of the first color resist 401 is in the same layer as the third color resist 403 and is of the same material, and can be formed by a single patterning process; the enclosure 501 set on the side periphery of the second color resist 402 is in the same layer as the first color resist 401 and is of the same material, and can be formed by a single patterning process.

[0099] In the embodiment of the present invention, the first light-shielding structure arranged on the side periphery of the first color resist 401 is arranged on the same layer and the same material as the third color resist 403; and / or the first light-shielding structure arranged on the side periphery of the second color resist 402 is arranged on the same layer and the same material as the first color resist 401, so that the first light-shielding structure arranged on the side periphery of the first color resist 401 can be formed in the process of forming the third color resist 403, and / or the first light-shielding structure arranged on the side periphery of the second color resist 402 can be formed in the process of forming the first color resist 401, which is conducive to simplifying the process flow and improving manufacturing efficiency.

[0100] In some embodiments of the present invention, optionally, a color resist layer and a light shielding structure are formed on a side of the driving circuit layer away from the base substrate, including:

[0101] Forming a third color barrier;

[0102] Forming a first color resist and forming a second light shielding structure for the first color resist at a surface edge of the first color resist close to the light emitting unit;

[0103] A second color resist is formed, and a second light shielding structure for the second color resist is formed on a surface edge of the second color resist close to the light emitting unit.

[0104] Specifically, see the embodiments of the present invention. Figure 1 , Figures 3 to 5 As shown, a protrusion 502 is formed on the surface edge of the first color resist 401 and the second color resist 402 close to the light emitting unit 300 .

[0105] In an embodiment of the present invention, by forming a second shading structure on the surface edge of the first color block and the second color block close to the light emitting unit, it is possible to further prevent the first wavelength of light emitted by the first light emitting unit 301 from being cross-interfered by the third wavelength of light emitted by the third light emitting unit 303, and further prevent the second wavelength of light emitted by the second light emitting unit 302 from being cross-interfered by the third wavelength of light emitted by the third light emitting unit 303, thereby improving the display effect.

[0106] In some embodiments of the present invention, optionally, the second light shielding structure disposed on the surface edge of the first color resist close to the light-emitting unit is made of the same material as the first color resist;

[0107] and / or

[0108] The material used for the second light shielding structure disposed near the surface edge of the light-emitting unit of the second color resist is the same as the material used for the second color resist.

[0109] Specifically, see the embodiments of the present invention. Figure 1 , Figures 3 to 5 As shown, that is, the protrusion 502 disposed on the first color resist 401 is made of the same material as the first color resist 401 , and the protrusion 502 disposed on the second color resist 402 is made of the same material as the second color resist 402 .

[0110] In an embodiment of the present invention, the material used for the second shading structure disposed on the surface edge of the first color resist 401 close to the light-emitting unit 300 is the same as the material used for the first color resist 401; and / or the material used for the second shading structure disposed on the surface edge of the second color resist 402 close to the light-emitting unit 300 is the same as the material used for the second color resist 402. The second shading structure disposed on the first color resist 401 can be formed in the process of forming the first color resist 401, and / or the second shading structure disposed on the second color resist 402 can be formed in the process of forming the second color resist 402, which is conducive to simplifying the process flow and improving manufacturing efficiency.

[0111] In some embodiments of the present invention, optionally, the first light emitting unit is a red light emitting unit, the second light emitting unit is a green light emitting unit, and the third light emitting unit is a blue light emitting unit. Figure 1 , Figures 3 to 5 As shown, the first light emitting unit 301 is a red light emitting unit, the second light emitting unit 302 is a green light emitting unit, and the third light emitting unit 303 is a blue light emitting unit.

[0112] It should be noted that the first light-emitting unit 301 is a red light-emitting unit, that is, the first wavelength is in the wavelength range of red light; the second light-emitting unit 302 is a green light-emitting unit, that is, the second wavelength is in the wavelength range of green light; the third light-emitting unit 303 is a green light-emitting unit, that is, the third wavelength is in the wavelength range of blue light. In fact, compared with red light and green light, the wavelength of blue light is shorter and it is easier to cause crosstalk to red and green light. The embodiment of the present invention can effectively isolate the crosstalk of blue light to red light and green light by setting the first shading structure and the second shading structure, thereby improving the display effect.

[0113] In some embodiments of the present invention, optionally, before forming the light-emitting unit on the side of the color-resist layer facing away from the base substrate, the method further includes:

[0114] An insulating layer is formed on the side of the color resist layer and the light-shielding structure facing away from the base substrate, and a plurality of non-through holes are formed on the insulating layer, wherein the depth of the non-through holes corresponding to the third color resist is greater than the depth of the non-through holes corresponding to the first color resist and the second color resist, so that after the light-emitting unit is formed, the distance between the third color resist and the third light-emitting unit is smaller than the distance between the first color resist and the first light-emitting unit, and the distance between the second color resist and the second light-emitting unit.

[0115] Specifically, see the embodiments of the present invention. Figure 1 , Figures 3 to 5 As shown, an insulating layer 206 (the material of the insulating layer 206, such as resin) is formed on the side of the color resist layer 400 and the light shielding structure 500 away from the base substrate 100, and a plurality of non-through holes 11 are formed on the insulating layer 206, the depth of the non-through hole 11 corresponding to the third color resist 403 is greater than the depth of the non-through hole 11 corresponding to the first color resist 401 and the second color resist 402, after the light-emitting unit 300 is formed, the first light-emitting unit 301 is located at the bottom of the non-through hole 11 corresponding to the first color resist 401, the second light-emitting unit 302 is located at the bottom of the non-through hole 11 corresponding to the second color resist 402, and the third light-emitting unit 303 is located at the bottom of the non-through hole 11 corresponding to the third color resist 403, so that the distance between the third color resist 403 and the third light-emitting unit 303 is smaller than the distance between the first color resist 401 and the first light-emitting unit 301, and the distance between the second color resist 402 and the second light-emitting unit 302. Through the above configuration, the embodiment of the present invention can increase the exposure of the third light-emitting unit 303 to the third color resist 403, thereby reducing the reflection of the third wavelength light to the first wavelength light and the second wavelength light, thereby reducing light crosstalk and improving the display effect.

[0116] In particular, in some optional embodiments of the present invention, the first light-emitting unit 301 is a red light-emitting unit, the second light-emitting unit 302 is a green light-emitting unit, and the third light-emitting unit 303 is a blue light-emitting unit. By forming a plurality of non-through holes 11 on the insulating layer 206, the depth of the non-through holes 11 corresponding to the third color resist 403 is greater than the depth of the non-through holes 11 corresponding to the first color resist 401 and the second color resist 402, so that the distance between the third color resist 403 and the third light-emitting unit 303 is smaller than the distance between the first color resist 401 and the first light-emitting unit 301, and the distance between the second color resist 402 and the second light-emitting unit 302, the embodiment of the present invention can effectively reduce the reflection of blue light to red light and green light, reduce light crosstalk, and improve the display effect.

[0117] An embodiment of the present invention provides a display device, comprising a display substrate according to any one of the embodiments of the present invention. The display device may be a display panel, or may include a display module of the display panel.

[0118] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A display substrate, characterized in that: include: substrate substrate; A driving circuit layer, disposed on the base substrate, comprising a plurality of pixel driving circuits; A light-emitting unit, arranged on a side of the driving circuit layer away from the base substrate, comprising a first light-emitting unit, a second light-emitting unit and a third light-emitting unit; the first light-emitting unit is used to emit light of a first wavelength, the second light-emitting unit is used to emit light of a second wavelength, and the third light-emitting unit is used to emit light of a third wavelength; A color resist layer is arranged on a side of the light emitting unit close to the base substrate, the color resist layer comprises: a first color resist, a second color resist and a third color resist; the first color resist is used to filter out light except the light of the first wavelength, the second color resist is used to filter out light except the light of the second wavelength, and the third color resist is used to filter out light except the light of the third wavelength; The shading structure includes a first shading structure and / or a second shading structure, wherein the first shading structure is arranged on the side of the first color resist, the second color resist and / or the third color resist and is formed as a barrier surrounding the side, and the second shading structure is arranged on the surface of the first color resist, the second color resist and / or the third color resist close to the light-emitting unit and is formed as a protrusion arranged around the edge of the surface.

2. The display substrate according to claim 1, characterized in that: The first light shielding structure is disposed on the side periphery of the first color block and the second color block; The first light shielding structure disposed on the side periphery of the first color resist is disposed in the same layer and material as the third color resist; and / or The first light shielding structure disposed on the side periphery of the second color resist is disposed in the same layer and made of the same material as the first color resist.

3. The display substrate according to claim 1, characterized in that: The second light shielding structure is disposed on the first color resistance and the second color resistance near the surface edge of the light emitting unit; The material of the second light shielding structure disposed near the surface edge of the light-emitting unit of the first color resist is the same as the material of the first color resist; and / or The material used for the second light shielding structure disposed near the surface edge of the second color resist and the material used for the second color resist are the same.

4. The display substrate according to claim 1, characterized in that: The distance between the third color resist and the third light emitting unit is smaller than the distance between the first color resist and the first light emitting unit, and smaller than the distance between the second color resist and the second light emitting unit.

5. The display substrate according to any one of claims 1 to 4, characterized in that: The first light emitting unit is a red light emitting unit, the second light emitting unit is a green light emitting unit, and the third light emitting unit is a blue light emitting unit.

6. A method for preparing a display substrate, characterized in that: include: providing a substrate base plate; A driving circuit layer is formed on the base substrate, wherein the driving circuit layer includes a plurality of pixel driving circuits; A color resist layer and a light shielding structure are formed on a side of the driving circuit layer away from the base substrate, the color resist layer comprising: a first color resist, a second color resist and a third color resist; the first color resist is used to filter out light except light of the first wavelength, the second color resist is used to filter out light except light of the second wavelength, and the third color resist is used to filter out light except light of the third wavelength; the light shielding structure comprises a first light shielding structure and / or a second light shielding structure, the first light shielding structure is arranged on the side of the first color resist, the second color resist and / or the third color resist and is formed as a fence surrounding the side, and the second light shielding structure is arranged on the surface of the first color resist, the second color resist and / or the third color resist close to the light emitting unit and is formed as a protrusion arranged around the edge of the surface; The light-emitting unit is formed on the side of the color resist layer away from the base substrate, and the light-emitting unit includes a first light-emitting unit, a second light-emitting unit and a third light-emitting unit; the first light-emitting unit is used to emit light of the first wavelength, the second light-emitting unit is used to emit light of the second wavelength, and the third light-emitting unit is used to emit light of the third wavelength.

7. The method for preparing a display substrate according to claim 6, characterized in that: A color resist layer and a light shielding structure are formed on a side of the driving circuit layer away from the base substrate, including: forming a third color block, and forming a first shielding structure for the first color block at the periphery of the region for forming the first color block; forming a first color resist, and forming a first shielding structure for the second color resist at the periphery of the region for forming the second color resist; A second color resist is formed.

8. The method for preparing a display substrate according to claim 6, characterized in that: A color resist layer and a light shielding structure are formed on a side of the driving circuit layer away from the base substrate, including: Forming a third color barrier; forming a first color block and forming a second light shielding structure for the first color block at a surface edge of the first color block close to the light-emitting unit; A second color resist is formed, and a second light shielding structure for the second color resist is formed on a surface edge of the second color resist close to the light emitting unit.

9. The method for preparing a display substrate according to claim 6, characterized in that: Before forming a light-emitting unit on a side of the color-resist layer away from the base substrate, the method further includes: An insulating layer is formed on the side of the color block layer and the light shading structure away from the base substrate, and a plurality of non-through holes are formed on the insulating layer, wherein the depth of the non-through holes corresponding to the third color block is greater than the depth of the non-through holes corresponding to the first color block and the second color block, so that after the light-emitting unit is formed, the distance between the third color block and the third light-emitting unit is smaller than the distance between the first color block and the first light-emitting unit, and the distance between the second color block and the second light-emitting unit.

10. A display device, characterized in that: The display substrate comprises the display substrate as claimed in any one of claims 1 to 5.

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