CN211879404U

CN211879404U - Display substrate and display device

Info

Publication number: CN211879404U
Application number: CN202020428435.7U
Authority: CN
Inventors: 李健; 陈振彰; 王世鹏; 李沛; 曹鹏军; 李金鹏; 王志远; 张腾
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: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-11-06
Anticipated expiration: 2030-03-27

Abstract

The embodiment of the disclosure discloses a display substrate and a display device, relates to the technical field of display, and is used for reducing the power consumption of the display substrate and improving the surface consistency of the display substrate while improving the contrast of the display substrate. The display substrate includes: the light-emitting device comprises a first substrate, a plurality of light-emitting devices, a light ray adjusting layer and a second substrate. The plurality of light emitting devices are disposed at one side of the first substrate, and the plurality of light emitting devices are spaced apart from each other. The light adjusting layer is located in gaps among the plurality of light emitting devices and on one side surface of the plurality of light emitting devices far away from the substrate, so that at least one light emitting device is surrounded by the light adjusting layer. The material of the light ray adjusting layer comprises a light absorbing material configured to absorb at least a portion of the light rays directed to the light ray adjusting layer. The second substrate covers the light ray adjusting layer. The display substrate and the display device are used for gray scale display.

Description

Display substrate and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display substrate and a display device.

Background

The submillimeter Light Emitting Diode (Mini LED) and the Micro Light Emitting Diode (Micro LED) have the advantages of self-luminescence, high efficiency, high brightness, high reliability, energy saving, high reaction speed and the like, and are applied to the fields of Micro display, mobile phone television and other medium-size display to cinema large-screen display and the like.

SUMMERY OF THE UTILITY MODEL

An object of the embodiments of the present disclosure is to provide a display substrate and a display device, which are used to improve the contrast of the display substrate, reduce the power consumption of the display substrate, and improve the surface uniformity of the display substrate.

In order to achieve the above purpose, the embodiments of the present disclosure provide the following technical solutions:

a first aspect of an embodiment of the present disclosure provides a display substrate. The display substrate includes: the light-emitting device comprises a first substrate, a plurality of light-emitting devices, a light ray adjusting layer and a second substrate. The plurality of light emitting devices are disposed at one side of the first substrate, and the plurality of light emitting devices are spaced apart from each other. The light adjusting layer is located in gaps among the plurality of light emitting devices and on one side surface of the plurality of light emitting devices far away from the first substrate, so that at least one light emitting device is surrounded by the light adjusting layer. The material of the light ray adjusting layer comprises a light absorbing material configured to absorb at least a portion of the light rays directed to the light ray adjusting layer. The second substrate covers the light ray adjusting layer.

The display substrate that this disclosed embodiment provided, through in the clearance between a plurality of luminescent device, and a plurality of luminescent device keep away from a side surface of first substrate and set up the light regulation layer, and one side of keeping away from first substrate at the light regulation layer covers the second substrate, not only can utilize the light regulation layer to form the protection to a plurality of luminescent device like this, utilize the second substrate to protect the light regulation layer, can also utilize the light regulation layer to absorb to directive to at least partly light to the light regulation layer, when improving display substrate's contrast, compare correlation technique and reduce display substrate's consumption. In addition, because the light ray adjusting layer and the second substrate are laminated on the first substrate formed with the plurality of light emitting devices by adopting a laminating process, compared with the related technology, the light ray adjusting layer can be prevented from being ground, the process is saved, and meanwhile, the surface of the display substrate has higher consistency.

In some embodiments, the light conditioning layer comprises: the first sub light ray adjusting layer and the second sub light ray adjusting layer. The first sub light ray adjusting layer is located in a gap between the plurality of light emitting devices. Relative to the first substrate, the surface of the first sub light ray adjusting layer, which is far away from the first substrate, is flush with the surface of the plurality of light emitting devices, which is far away from the first substrate, or is higher or lower than the surface of the plurality of light emitting devices, which is far away from the first substrate. The material of the first sub light ray adjustment layer includes a light absorbing material configured to absorb at least a portion of the light rays emitted to the first sub light ray adjustment layer. The second sub light ray adjusting layer is arranged on one side, far away from the first substrate, of the first sub light ray adjusting layer. Relative to the first substrate, the surface, far away from the first substrate, of the second sub light ray adjusting layer is higher than the surface, far away from the first substrate, of the plurality of light emitting devices. The second sub-light ray adjusting layer is a transparent film.

In some embodiments, the second sub light adjustment layer includes a first portion and a second portion in a case where the first sub light adjustment layer is away from a surface of the first substrate with respect to the first substrate and is lower than a surface of the plurality of light emitting devices away from the first substrate. The orthographic projection of the first part on the first substrate is coincident with the orthographic projection of the plurality of light-emitting devices on the first substrate, and the orthographic projection of the second part on the first substrate is coincident with the orthographic projection of the first sub light ray adjusting layer on the first substrate. The thickness of the first portion ranges from 20 μm to 100 μm. The thickness of the second portion ranges from 50 μm to 100 μm.

In some embodiments, the refractive index of the second sub light ray adjustment layer is greater than the refractive index of the second substrate.

In some embodiments, a distance between a surface of the first sub light adjustment layer away from the first substrate and the first substrate is 80% to 120% of a thickness of the plurality of light emitting devices.

In some embodiments, the light conditioning layer further comprises: and a third sub light ray adjusting layer located in the gap between the plurality of light emitting devices and disposed between the first sub light ray adjusting layer and the first substrate. Relative to the first substrate, the surface of the third sub light ray adjusting layer, which is far away from the first substrate, is flush with the surface of the plurality of light emitting devices, which is far away from the first substrate, or is lower than the surface of the plurality of light emitting devices, which is far away from the first substrate. The material of the third sub light ray regulation layer includes a light reflective material configured to reflect light incident into the third sub light ray regulation layer from the plurality of light emitting devices back into the plurality of light emitting devices.

In some embodiments, the light conditioning layer comprises: a first sub light ray adjustment layer and a third sub light ray adjustment layer. The third sub light ray adjusting layer is located in a gap between the plurality of light emitting devices. Relative to the first substrate, the surface of the third sub light ray adjusting layer, which is far away from the first substrate, is flush with the surface of the plurality of light emitting devices, which is far away from the first substrate, or is lower than the surface of the plurality of light emitting devices, which is far away from the first substrate. The material of the third sub light ray regulation layer includes a light reflective material configured to reflect light incident into the third sub light ray regulation layer from the plurality of light emitting devices back into the plurality of light emitting devices. The first sub light ray adjusting layer is arranged on one side, far away from the first substrate, of the third sub light ray adjusting layer. Relative to the first substrate, the surface, far away from the first substrate, of the first sub light ray adjusting layer is higher than the surface, far away from the first substrate, of the plurality of light emitting devices. The material of the first sub light ray adjustment layer includes a light absorbing material configured to absorb at least a portion of the light rays emitted to the first sub light ray adjustment layer.

In some embodiments, the third sub light ray adjustment layer has a reflectivity of greater than or equal to 70%.

In some embodiments, each light emitting device comprises: a third substrate; and a light-emitting layer provided on one side of the third substrate. The light emitting layer is adjacent to the first substrate with respect to the third substrate.

In some embodiments, in a case where the light ray adjustment layer includes a second sub light ray adjustment layer, the refractive index of the third substrate is greater than the refractive index of the second sub light ray adjustment layer.

In some embodiments, in a case where the light ray regulation layer includes a third sub light ray regulation layer, a surface of the third sub light ray regulation layer which is away from the first substrate is higher than a surface of the plurality of light emitting devices which is away from the first substrate with respect to the first substrate.

In some embodiments, in a case where the light ray adjustment layer includes the first sub light ray adjustment layer, a material of the first sub light ray adjustment layer includes an acryl glue doped with a light absorbing material. Under the condition that the light ray adjusting layer comprises a second sub light ray adjusting layer, the material of the second sub light ray adjusting layer comprises acrylic glue. Under the condition that the light ray adjusting layer comprises a third sub light ray adjusting layer, the material of the third sub light ray adjusting layer comprises acrylic glue doped with a reflective material.

In some embodiments, a side surface of the second substrate remote from the first substrate is provided with a plurality of microstructures. The plurality of microstructures is configured to change a propagation direction of at least a portion of light rays from the plurality of light emitting devices and through the second substrate.

In some embodiments, the surface shape of the plurality of microstructures comprises at least one of a pyramid, a wedge, a cambered surface, and a spherical surface.

A second aspect of the embodiments of the present disclosure provides a display device, which includes the display substrate provided in the above technical solution.

The beneficial effects that the display device provided by the embodiment of the present disclosure can achieve are the same as those that the display substrate provided by the above technical scheme can achieve, and are not described herein again.

Drawings

In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to the drawings. Furthermore, the drawings in the following description may be regarded as schematic diagrams and are not intended to limit the actual size of products, the actual flow of methods, and the like, involved in the embodiments of the present disclosure.

Fig. 1 is a flowchart of a method of manufacturing a display substrate according to a related art;

FIG. 2 is a top view of a display substrate according to some embodiments of the present disclosure;

FIG. 3 is a cross-sectional view taken along A-A' of the display substrate shown in FIG. 2;

FIG. 4 is another cross-sectional view taken along A-A' of the display substrate shown in FIG. 2;

FIG. 5 is a cross-sectional view taken along A-A' of the display substrate shown in FIG. 2;

FIG. 6 is a cross-sectional view taken along A-A' of the display substrate shown in FIG. 2;

FIG. 7 is a cross-sectional view taken along A-A' of the display substrate shown in FIG. 2;

FIG. 8 is a cross-sectional view taken along A-A' of the display substrate shown in FIG. 2;

FIG. 9 is a cross-sectional view taken along A-A' of the display substrate shown in FIG. 2;

FIG. 10 is a cross-sectional view taken along A-A' of the display substrate shown in FIG. 2;

FIG. 11 is a block diagram of a Mini LED in accordance with some embodiments of the present disclosure;

FIG. 12 is a block diagram of a display substrate according to some embodiments of the present disclosure;

FIG. 13 is a partial block diagram of a display substrate according to some embodiments of the present disclosure;

FIG. 14 is a flow chart of a method of fabricating a display substrate according to some embodiments of the present disclosure;

FIG. 15 is a diagram illustrating a process for fabricating a display substrate according to some embodiments of the present disclosure;

FIG. 16 is a diagram illustrating another fabrication step of a display substrate according to some embodiments of the present disclosure;

FIG. 17 is a block diagram of a display device in accordance with some embodiments of the present disclosure.

Detailed Description

Technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present disclosure belong to the protection scope of the present disclosure.

Unless the context requires otherwise, throughout the description and the claims, the term "comprise" and its other forms, such as the third person's singular form "comprising" and the present participle form "comprising" are to be interpreted in an open, inclusive sense, i.e. as "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "example" or "some examples" and the like are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

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

In describing some embodiments, the expression "connected" and its derivatives may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other.

"at least one of A, B and C" has the same meaning as "A, B or at least one of C," each including the following combination of A, B and C: a alone, B alone, C alone, a and B in combination, a and C in combination, B and C in combination, and A, B and C in combination.

"A and/or B" includes the following three combinations: a alone, B alone, and a combination of A and B.

The use of "configured to" herein means open and inclusive language that does not exclude devices that are suitable or configured to perform additional tasks or steps.

Additionally, the use of "based on" means open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values may in practice be based on additional conditions or values beyond those stated.

As used herein, "about" or "approximately" includes the stated values as well as average values within an acceptable deviation range for the particular value, as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

Example embodiments are described herein with reference to cross-sectional and/or plan views as idealized example figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

In the related art, the Mini LED or the Micro LED can emit light of a plurality of colors, for example, red, green, blue, yellow, or the like. The Mini LED or the Micro LED can be used as a pixel and applied to a display substrate for displaying.

As shown in fig. 1, a display substrate to which a plurality of Mini LEDs 2' are applied is taken as an example. In the related art, a black paste is generally applied to the gaps between the Mini LEDs 2 ' and the surfaces of the Mini LEDs 2 ', and the black paste is polished by a polishing process so that the thickness of the portions of the black paste on the surfaces of the Mini LEDs 2 ' is a desired thickness. This can improve the contrast of the display device using the milled black paste. Here, the thickness of the black paste at the surface of the Mini LEDs 2' is only polished to 40 to 50 μm, depending on the polishing process.

If the thickness of the black paste is greater than that of the MiniLED 2', in the case where the display substrate displays the same brightness as that when the black paste is not provided, a larger driving voltage needs to be supplied, which increases the power consumption of the display substrate. In addition, when the black glue is made of silica gel doped with black particles, the black particles may fall off from the silica gel during the polishing process of the black glue, which may cause unevenness on the surface of the polished black glue and may affect the appearance of the display substrate.

As shown in fig. 2, some embodiments of the present disclosure provide a display substrate 100. As shown in fig. 3 to 9, the display substrate 100 includes: the light emitting device includes a first substrate 1, a plurality of light emitting devices 2 disposed on one side of the first substrate 1, a light adjusting layer 3, and a second substrate 4.

In some examples, as shown in fig. 13, the display substrate 100 has a plurality of sub-pixel regions S arranged in an array.

The plurality of light emitting devices 2 may be arranged in various ways. For example, one light emitting device 2 is provided in each sub-pixel region S, and in this case, the one light emitting device 2 is used to perform display of sub-pixels in the corresponding sub-pixel region S. For another example, a plurality of light emitting devices 2 are provided in each sub-pixel region S and are commonly used for display.

Some embodiments of the present disclosure will be described below schematically in terms of a structure of the display substrate 100, taking as an example that one light emitting device 2 is disposed in each sub-pixel region S.

In some examples, as shown in fig. 12, the first substrate 1 includes a substrate base plate 11, a plurality of pixel driving circuits, a plurality of electrode leads 13, and a plurality of pads. Wherein the plurality of solder joints includes a plurality of anode solder joints 15 and a plurality of cathode solder joints 14.

Here, the type of the substrate base plate 11 may include various types.

Illustratively, the substrate base 11 may be a rigid substrate base, such as a glass substrate base or a PMMA (Polymethyl methacrylate) substrate base. In the case where the substrate base plate 1 is a glass substrate base plate, it is advantageous to improve the accuracy of the wiring (e.g., the plurality of pixel drive circuits and the plurality of electrode leads 13) provided on one side thereof.

Illustratively, the substrate 11 may be a flexible substrate, such as a PET (Polyethylene terephthalate) substrate, a PEN (Polyethylene naphthalate) substrate, or a PI (Polyimide) substrate.

The arrangement of the plurality of pixel drive circuits described above is related to the arrangement of the light emitting devices 2. For example, in the case where the plurality of pixel drive circuits are provided on the substrate 11 side and one light emitting device 2 is provided in each sub-pixel region S, the plurality of pixel drive circuits are respectively located in the plurality of sub-pixel regions S.

Here, the structure of the pixel driving circuit may include various kinds. For example, the structure of the pixel driving circuit may include structures such as "2T 1C", "6T 1C", "7T 1C", "6T 2C" or "7T 2C". Here, "T" is represented as a thin film transistor, the number located in front of "T" is represented as the number of thin film transistors, "C" is represented as a storage capacitor, and the number located in front of "C" is represented as the number of storage capacitors. Among a plurality of thin film transistors included in the pixel driving circuit of each structure, one thin film transistor is a driving transistor.

The plurality of electrode leads 13 and the plurality of pixel driving circuits are located on the same side of the base substrate 11. The plurality of electrode leads 13 are disposed in a manner related to the manner in which the light emitting device 2 is disposed.

For example, each electrode lead 13 may be disposed in a row of the sub-pixel regions S, and the extending direction thereof may be parallel (or approximately parallel) to the extending direction of the row of the sub-pixel regions S. Alternatively, as shown in fig. 13, each electrode lead 13 may be disposed in a column of the sub-pixel regions S, and the extending direction thereof may also be parallel (or approximately parallel) to the extending direction of the column of the sub-pixel regions S. That is, the number of the electrode leads 13 provided in each row sub-pixel region S or each column sub-pixel region S is the same as the number of the light emitting devices 2 provided in each sub-pixel region S in the row sub-pixel region S or the column sub-pixel region S.

As shown in fig. 12, the pads are provided on the side of the pixel driving circuits and the electrode leads 13 away from the base substrate 11.

The arrangement of the plurality of solder pads is related to the arrangement and structure of the light emitting device 2.

Illustratively, each light emitting device 2 may be, for example, a Mini LED or a Micro LED each having two electrode pins (e.g., a cathode electrode pin and an anode electrode pin). At this time, as shown in fig. 13, in each sub-pixel region S, one cathode pad 14 and one anode pad 15 may be disposed. In the same sub-pixel region S, the anode pad 15 may be electrically connected to a pixel driving circuit (e.g., electrically connected to the driving transistor 12 shown in fig. 12), and the cathode pad 14 may be electrically connected to the electrode lead 13. In this way, the cathode electrode pin of the light emitting device 2 can be inserted into the cathode pad 14 in the same sub-pixel region S, and the anode electrode pin can be inserted into the anode pad 15 in the same sub-pixel region S, so as to electrically connect the light emitting device 2 with the pixel driving circuit and the electrode lead 14.

Here, the pixel drive circuit is configured to supply a drive voltage to the light emitting device 2; the electrode lead 13 is configured to supply a common voltage to the light emitting device 2. Thus, under the cooperation between the pixel driving circuit and the electrode lead 13, the light emitting state of the light emitting device 2 can be controlled, so that the display substrate 100 can realize gray scale display.

Of course, the embodiment of the present disclosure may also adopt other driving methods besides the above-mentioned driving method for driving the plurality of light emitting devices 2. For example, the embodiment of the present disclosure may also drive the plurality of light emitting devices 2 in a passive driving manner or an IC (integrated circuit) driving manner.

In some examples, as shown in fig. 2, the plurality of light emitting devices 2 are disposed to be spaced apart from each other, that is, the plurality of light emitting devices 2 have a gap therebetween. As shown in fig. 3 to 9, the light adjusting layer 3 is located in the gap between the plurality of light emitting devices 2 and on the surface of one side of the plurality of light emitting devices 2 away from the first substrate 1, so that at least one light emitting device 2 is surrounded by the light adjusting layer 3.

Here, the light adjusting layer 3 forms a "surrounding" to the at least one light emitting device 2, that is, the light adjusting layer is in close contact with the side of the at least one light emitting device 2 and the surface of the side far from the first substrate 1, and the light adjusting layer forms a relatively complete covering to the side of the at least one light emitting device 2 and the surface of the side far from the first substrate 1. Therefore, the surface of the at least one light-emitting device 2 can be protected, the quality of the at least one light-emitting device 2 is ensured, the at least one light-emitting device 2 can be stably fixed on the first substrate 1, the light-emitting device 2 is prevented from being loosened and difficult to be well electrically connected with the first substrate 1, and the good display effect of the display substrate 100 is further ensured.

In some examples, the material of the light ray adjustment layer 3 includes a light absorbing material configured to absorb at least a portion of the light rays directed to the light ray adjustment layer 3.

Here, the light irradiated to the light ray adjusting layer 3 includes: light emitted from the outside to the light adjusting layer 3 and light emitted from the plurality of light emitting devices 2.

Since the area of the light emitted from the outside to the light ray adjusting layer 3 is substantially the same as the area of the surface of the light ray adjusting layer 3 on the side away from the first substrate 1, the light emitted from the outside to the light ray adjusting layer 3 can be substantially absorbed by the light ray adjusting layer 3. In this way, in the process of displaying on the display substrate 100, the light ray adjusting layer 3 may be used to reduce the amount of light rays emitted from the outside to the display substrate 100 and emitted by the first substrate 1 and/or the plurality of light emitting devices 2, and when the display substrate 100 is in a dark state (i.e., the light emitting devices do not emit light), the display surface of the display substrate 100 may be in a darker state, so as to effectively improve the contrast of the display substrate 100.

Because the propagation of the light emitted by the light emitting device 2 is in any direction, when the light emitted by the light emitting device 2 irradiates the light adjusting layer 3, the light can be absorbed by the part of the light adjusting layer 3, which comprises the light absorbing material, and the light can smoothly pass through the part of the light adjusting layer, which does not comprise the light absorbing material. Thus, the light ray adjusting layer 3 only absorbs a part of the light rays emitted by the light emitting device 2, and compared with the related art, the light ray adjusting layer 3 reduces the amount of light rays emitted by the light emitting device 2 and is beneficial to reducing the power consumption of the display substrate 100.

In some examples, as shown in fig. 3 to 9, the second substrate 4 covers the light adjusting layer 3.

Illustratively, the second substrate 4 may be a PET substrate. The PET substrate has better plasticity and higher transparency, so that the PET substrate can be ensured to have good light transmittance, and the loss of light passing through the PET substrate is reduced or avoided.

In this example, the light adjusting layer 3 is formed on one side of the second substrate 4, and then the light adjusting layer 3 and the second substrate 4 are laminated on the first substrate 1 formed with the plurality of light emitting devices 2 using, for example, a lamination process. Compare correlation technique like this, not only can avoid grinding light regulation layer 3 for light regulation layer 3 keeps away from a side surface of first substrate 1 and is comparatively smooth surface, can also utilize second substrate 4 to form the protection to light regulation layer 3, avoids light regulation layer 3 to keep away from a side surface of first substrate 1 and receives the damage, and makes the surface chromaticity of display substrate 100 have the surface of higher uniformity.

Therefore, according to the display substrate 100 provided by some embodiments of the present disclosure, the light adjustment layer 3 is disposed in the gap between the plurality of light emitting devices 2 and on the surface of the side of the plurality of light emitting devices 2 away from the first substrate 1, and the second substrate 4 covers the side of the light adjustment layer 3 away from the first substrate 1, so that the plurality of light emitting devices 2 can be protected by the light adjustment layer 3, the light adjustment layer 3 can be protected by the second substrate 4, and at least a part of light emitted to the light adjustment layer 3 can be absorbed by the light adjustment layer 3, which improves the contrast of the display substrate 100 and reduces the power consumption of the display substrate 100 compared with the related art. In addition, since the light ray adjusting layer 3 and the second substrate 4 are laminated on the first substrate 1 on which the plurality of light emitting devices 2 are formed by, for example, a lamination process, compared with the related art, the light ray adjusting layer 3 can be prevented from being ground, the process is saved, and the surface of the display substrate 100 can have higher uniformity.

In some embodiments of the present disclosure, the structure of the light adjusting layer 3 includes a plurality of structures, and the type of the structure of the light adjusting layer 3 adopted in the display substrate 100 can be selected according to actual needs. The structure of the light ray adjusting layer 3 is schematically described below.

In some embodiments, as shown in fig. 4, the light adjusting layer 3 includes: a first sub light ray adjusting layer 31 positioned in the gap between the plurality of light emitting devices 2, and a second sub light ray adjusting layer 32 disposed on a side of the first sub light ray adjusting layer 31 away from the first substrate 1.

In some examples, the positional relationship between the first sub light adjusting layer 31 and the plurality of light emitting devices 2 includes a variety, which is related to the structure of the plurality of light emitting devices 2.

Illustratively, the plurality of light emitting devices 2 includes Mini LEDs. The positional relationship between the first sub light adjusting layer 31 and the plurality of light emitting devices 2 may be: with respect to the first substrate 1, the surface of the first sub light adjustment layer 31 away from the first substrate 1 is flush with the surface of the plurality of light emitting devices 2 away from the first substrate 1, or, as shown in fig. 4, is lower than the surface of the plurality of light emitting devices 2 away from the first substrate 1. At this time, the first sub light ray adjustment layer 31 is entirely located in the gaps between the plurality of light emitting devices 2, and the first sub light ray adjustment layer 31 also covers at least a part of the side surfaces of the plurality of light emitting devices 2.

Here, since the first sub light ray adjustment layer 31 is entirely located in the gap between the plurality of light emitting devices 2, the distance between the surface of the first sub light ray adjustment layer 31 away from the first substrate 1 and the first substrate 1 is the thickness of the first sub light ray adjustment layer 31. The thickness of the first sub light ray adjustment layer 31 may be 80% to 100% of the thickness of the plurality of light emitting devices 2 (i.e., the size of the plurality of light emitting devices 2 in the direction perpendicular to the first substrate 1). For example, the thickness of the plurality of light emitting devices 2 may be 100 μm, and the thickness of the first sub light adjusting layer 31 may be 80 μm to 100 μm. For example, the thickness of the plurality of light emitting devices 2 may be 150 μm, and the thickness of the first sub light adjusting layer 31 may be 120 μm to 150 μm. The specific thickness of the first sub light ray adjustment layer 31 can be set according to actual needs.

Illustratively, the plurality of light emitting devices 2 includes Mini LEDs or Micro LEDs. The positional relationship between the first sub light ray adjustment layer 31 and the plurality of light emitting devices 2 may also be: with respect to the first substrate 1, the first sub light adjustment layer 31 is higher than the surface of the plurality of light emitting devices 2 away from the first substrate 1, away from the surface of the first substrate 1. At this time, a part of the first sub light ray adjustment layer 31 is located in the gap between the plurality of light emitting devices 2, and another part is located on the surface of the side of the plurality of light emitting devices 2 away from the first substrate 1, so that the first sub light ray adjustment layer 31 also covers the exposed surfaces of the plurality of light emitting devices 2 (including the side surfaces of the plurality of light emitting devices 2 and the surface of the side away from the first substrate 1).

Here, the distance between the surface of the first sub light ray adjustment layer 31 away from the first substrate 1 and the first substrate 1 may be greater than the thickness of the plurality of light emitting devices 2 and less than or equal to 120% of the thickness of the plurality of light emitting devices 2.

The present example exemplifies that the plurality of light emitting devices 2 include Micro LEDs. The thickness of the Micro LED is generally small, and for example, the thickness may be less than 10 μm. In consideration of the manufacturing process of the first sub light ray adjustment layer 31, in the case where the thickness of the first sub light ray adjustment layer 31 is thin, the thickness of the first sub light ray adjustment layer 31 to be formed may be about 10 μm. Thus, the first sub light adjustment layer 31 is higher than the surface of the plurality of light emitting devices 2 away from the first substrate 1 with respect to the first substrate 1, where the surface is away from the first substrate 1. For example, the thickness of the light emitting device 2 may be 10 μm, and the distance between the surface of the first sub light adjusting layer 31 away from the first substrate 1 and the first substrate 1 may be greater than 10 μm and less than or equal to 12 μm. The specific thickness of the first sub light ray adjustment layer 31 can be set according to actual needs.

It should be noted that the first sub light ray adjustment layer 31 also covers a portion of the first substrate 1 located in a gap between the plurality of light emitting devices 2, and in a case that the first sub light ray adjustment layer 31 and the first substrate 1 have a large adhesion force, the first sub light ray adjustment layer 31 may be used to enhance connectivity between the plurality of light emitting devices 2 and the first substrate 1, so that the plurality of light emitting devices 2 can be more firmly fixed on the first substrate 1.

In some examples, the material of the first sub light ray adjustment layer 31 includes a light absorbing material configured to absorb at least a portion of the light rays emitted to the first sub light ray adjustment layer 31. Therefore, the first sub light ray adjusting layer 31 can be used for absorbing light rays emitted to the first sub light ray adjusting layer 31 from the outside, the light rays are weakened or even prevented from being reflected by the first substrate 1 and/or the plurality of light emitting devices 2, and under the condition that the display substrate 100 is in a dark state (namely, the light emitting devices do not emit light), the display surface of the display substrate 100 can be in a blacker state, so that the contrast of the display substrate 100 is improved.

Further, in the above example, in the case where the first sub light ray adjustment layer 31 is located away from the surface of the first substrate 1 with respect to the first substrate 1 and is higher than the surface of the plurality of light emitting devices 2 away from the first substrate 1, the distance between the surface of the first sub light ray adjustment layer 31 away from the first substrate 1 and the first substrate 1 is at most 120% of the thickness of the light emitting devices 2, which greatly reduces the size of the first sub light ray adjustment layer 31 located on the surface of the plurality of light emitting devices 2 on the side away from the first substrate 1, is advantageous to reduce the absorption of light rays emitted from the plurality of light emitting devices 2 by the first sub light ray adjustment layer 31 and reduce the power consumption of the display substrate 100, compared to the related art.

In other examples, as shown in fig. 4, the light ray regulation layer 3 includes a second sub light ray regulation layer 32 that is higher than a surface of the plurality of light emitting devices 2 away from the first substrate 1 with respect to the first substrate 1, the surface being away from the first substrate 1. That is, a portion of the second sub light adjustment layer 32 is located between the plurality of light emitting devices 2 and the second substrate 4, so that when the light adjustment layer 3 and the second substrate 4 are formed on the first substrate 1 having the plurality of light emitting devices 2 by, for example, a bonding process, the plurality of light emitting devices 2 can be protected by using the portion of the second sub light adjustment layer 32 located between the plurality of light emitting devices 2 and the second substrate 4, and the plurality of light emitting devices 2 are prevented from being damaged during the bonding process.

Here, the thickness of the second sub light ray regulation layer 32 is related to the positional relationship between the first sub light ray regulation layer 31 and the plurality of light emitting devices 2.

For example, in a case where the surface of the first sub light adjustment layer 31, which is far from the first substrate 1, is flush with the surface of the plurality of light emitting devices 2, which is far from the first substrate 1, or is higher than the surface of the plurality of light emitting devices 2, which is far from the first substrate 1, with respect to the first substrate 1, the surface of the second sub light adjustment layer 32, which is close to the first substrate 1, is a relatively flat surface, so that the thickness of each part of the second sub light adjustment layer 32 may be relatively uniform. The thickness of the second sub light ray adjusting layer 32 can be selected according to actual needs, for example, the thickness of the second sub light ray adjusting layer 32 can range from 50 μm to 100 μm; alternatively, the thickness of the second sub light ray adjustment layer 32 may range from 10 μm to 40 μm.

Illustratively, as shown in fig. 4, in a case where the first sub light adjustment layer 31 is located farther from the surface of the first substrate 1 than the surface of the plurality of light emitting devices 2 is located farther from the first substrate 1 with respect to the first substrate 1, the surface of the second sub light adjustment layer 32 on the side closer to the first substrate 1 is an uneven surface. At this time, the second sub light adjusting layer 32 includes a first portion 321 and a second portion 322, wherein an orthographic projection of the first portion 321 on the first substrate 1 coincides with an orthographic projection of the plurality of light emitting devices 2 on the first substrate 1, and an orthographic projection of the second portion 322 on the first substrate 1 coincides with an orthographic projection of the first sub light adjusting layer 31 on the first substrate 1. The thickness of the first portion 321 may range from 20 μm to 100 μm. The thickness of the second portion 322 ranges from 50 μm to 100 μm.

Of course, the thickness range of the first portion 321 and the thickness range of the second portion 322 may be other value ranges, and may be selected according to actual requirements.

In some examples, the second sub light adjusting layer 32 is a transparent film. The transparent film has a relatively high light transmittance (e.g., the light transmittance may be greater than or equal to 90%). The light emitted by the light emitting devices 2 can smoothly pass through the second sub light ray adjusting layer 32 to be emitted to the outside, so that adverse effects on the propagation of the light emitted by the light emitting devices 2 by the second sub light ray adjusting layer 32 can be avoided.

In some examples, the refractive index of the second sub light ray adjustment layer 32 is greater than the refractive index of the second substrate 4. For example, the refractive index of the second sub light ray adjustment layer 32 may be about 1.5, for example, the refractive index may be 1.49, 1.5, 1.51, 1.52, or the like; the refractive index of the second substrate 4 may be about 1.4, for example, the refractive index may be 1.39, 1.4, 1.41, 1.42, or the like.

Because the refractive index of the light of the external atmosphere is about 1.0, the light emitted by the plurality of light emitting devices 2 can be emitted to the optically thinner medium step by step from the optically denser medium in the process of emitting to the outside by setting the refractive indexes of the second sub light ray adjusting layer 32 and the second substrate 4 and making the refractive index of the second sub light ray adjusting layer 32 larger than the refractive index of the second substrate 4. Compared with the case that the light rays emitted by the plurality of light emitting devices 2 directly emit to the outside atmosphere, the light rays are favorably emitted and guided, and the total reflection condition is weakened or even avoided.

In other embodiments, as shown in fig. 6, the light adjusting layer 3 further includes, in addition to the first sub light adjusting layer 31 and the second sub light adjusting layer 32: the third sub light adjusting layer 33. The third sub light adjusting layer 33 is located in a gap between the plurality of light emitting devices 2 and is disposed between the first sub light adjusting layer 31 and the first substrate 1. That is, the third sub light ray adjustment layer 33, the first sub light ray adjustment layer 31, and the second sub light ray adjustment layer 32 are sequentially stacked in the direction of the first substrate 1.

In some examples, the positional relationship between the first sub light adjusting layer 31 and the plurality of light emitting devices 2 may be: with respect to the first substrate 1, the surface of the third sub light adjustment layer 31 away from the first substrate 1 is flush with the surface of the plurality of light emitting devices 2 away from the first substrate 1, or, as shown in fig. 6, is lower than the surface of the plurality of light emitting devices 2 away from the first substrate 1. At this time, the third sub light adjustment layer 33 is entirely located in the gaps between the plurality of light emitting devices 2, and the third sub light adjustment layer 33 also covers at least a part of the side surfaces of the plurality of light emitting devices 2.

In some examples, the material of the third sub light adjusting layer 33 includes a light reflecting material configured to reflect light incident into the third sub light adjusting layer 33 from the plurality of light emitting devices 2 back into the plurality of light emitting devices 2. Like this the light that a plurality of luminescent device 2 sent when the side of a plurality of luminescent device 2 that the directive is covered by third sub light regulation layer 33, alright once reflect once less taking place under the effect of third sub light regulation layer 33 for light after the reflection can be from the surperficial directive to the external world of keeping away from first substrate 1 of a plurality of luminescent device 2, be favorable to improving the utilization ratio of the light that a plurality of luminescent device 2 sent, improve display substrate 100's light efficiency, reduce display substrate 100's consumption.

The third sub light ray adjusting layer 33 only covers at least a part of the side surfaces of the plurality of light emitting devices 2, so that light rays emitted by the plurality of light emitting devices 2 can be emitted from the surface of the plurality of light emitting devices 2 far away from the first substrate 1, and the situation that the light rays are reflected back to the plurality of light emitting devices 2 and are difficult to emit to the outside after being emitted to the surface of the plurality of light emitting devices 2 far away from the first substrate 1 is avoided.

In some examples, the reflectivity of the third sub light adjusting layer 33 is greater than or equal to 70%. Therefore, the third sub light ray adjusting layer 33 can effectively ensure that the light rays emitted by the light emitting devices 2 and emitted to the third sub light ray adjusting layer 33 have a good reflection effect, and the display substrate 100 has high luminous efficiency and low power consumption. For example, the reflectivity of the third sub light adjusting layer 33 may be 70%, 80%, 90%, or 95%, etc.

Here, in the case where the light ray regulation layer 3 further includes the third sub light ray regulation layer 33, as for the positional relationship between the first sub light ray regulation layer 31 and the plurality of light emitting devices 2, it may be: with respect to the first substrate 1, the surface of the first sub light adjustment layer 31 away from the first substrate 1 is flush with the surface of the plurality of light emitting devices 2 away from the first substrate 1, or is higher or lower than the surface of the plurality of light emitting devices 2 away from the first substrate 1. For example, the distance between the surface of the first sub light ray adjustment layer 31 away from the first substrate 1 and the first substrate 1 is 80% to 120% of the thickness of the plurality of light emitting devices 2. For other descriptions of the first sub light ray adjustment layer 31 and the second sub light ray adjustment layer 32, reference may be made to the descriptions of the first sub light ray adjustment layer 31 and the second sub light ray adjustment layer 32 in some of the above examples, which are not described herein again.

In still other embodiments, as shown in fig. 5, the light adjusting layer 3 may include: a third sub light ray adjustment layer 33 and a first sub light ray adjustment layer 31. Wherein the material of the third sub light ray regulation layer 33 includes a light reflective material configured to reflect light rays incident into the third sub light ray regulation layer 33 from the plurality of light emitting devices 2 back into the plurality of light emitting devices 2. The material of the first sub light ray adjustment layer 31 includes a light absorbing material configured to absorb at least a portion of the light rays emitted to the first sub light ray adjustment layer 31.

In some examples, as shown in fig. 5, the third sub light adjusting layer 33 is positioned in a gap between the plurality of light emitting devices 2. With respect to the first substrate 1, the surface of the third sub light adjustment layer 33 away from the first substrate 1 is flush with the surface of the plurality of light emitting devices 2 away from the first substrate 1, or is lower than the surface of the plurality of light emitting devices 2 away from the first substrate 1. At this time, the third sub light adjustment layer 33 is entirely located in the gaps between the plurality of light emitting devices 2, and the third sub light adjustment layer 33 also covers at least a part of the side surfaces of the plurality of light emitting devices 2.

In some examples, as shown in fig. 5, the first sub light adjusting layer 31 is disposed on a side of the third sub light adjusting layer 33 away from the first substrate 1. With respect to the first substrate 1, the first sub light adjustment layer 31 is higher than the surface of the plurality of light emitting devices 2 away from the first substrate 1, away from the surface of the first substrate 1. That is, regardless of the positional relationship between the third sub light ray adjustment layer 33 and the surface of the plurality of light emitting devices 2 away from the first substrate 1, the first sub light ray adjustment layer 31 covers the plurality of light emitting devices 2 and the third sub light ray adjustment layer 33, and a part of the first sub light ray adjustment layer 31 is located on the surface of the plurality of light emitting devices 2 away from the first substrate 1, and protects the plurality of light emitting devices 2.

Through setting up third sub light regulation layer 33 and first sub light regulation layer 31, can utilize third sub light regulation layer 33 to improve the utilization ratio of the light that a plurality of emitting device 2 sent under the mating reaction between third sub light regulation layer 33 and first sub light regulation layer 31, improve display substrate 100's light efficiency, reduce display substrate 100's consumption, and utilize first sub light regulation layer 31, improve display substrate 100's contrast.

In addition, in the process of forming the light ray adjusting layer 3, the thickness of a portion of the first sub light ray adjusting layer 31 on the surface of the plurality of light emitting devices 2 away from the first substrate 1 (for example, the thickness is 10 μm) may be adjusted by adjusting the thickness of the first sub light ray adjusting layer 31, so that the absorption of light rays emitted from the plurality of light emitting devices 2 by the first sub light ray adjusting layer 31 may be reduced and the power consumption of the display substrate 100 may be reduced while the contrast of the display substrate 100 may be improved by the first sub light ray adjusting layer 31.

Here, for other descriptions of the third sub light ray adjustment layer 33 and the first sub light ray adjustment layer 31, reference may be made to the descriptions of the third sub light ray adjustment layer 33 and the first sub light ray adjustment layer 31 in some of the above examples, and further description is omitted here.

In the above embodiments, the material of each film included in the light ray adjusting layer 3 includes a plurality of kinds.

In some examples, in a case where the light ray adjustment layer 3 includes the first sub light ray adjustment layer 31, the material of the first sub light ray adjustment layer 31 includes acryl glue doped with a light absorbing material. The light absorbing material may comprise carbon black particles, for example.

In some examples, in a case where the light ray adjustment layer 3 includes the second sub light ray adjustment layer 32, the material of the second sub light ray adjustment layer 32 includes acryl glue.

In some examples, in a case where the light ray adjustment layer 3 includes the third sub light ray adjustment layer 33, the material of the third sub light ray adjustment layer 33 includes acryl glue doped with a light reflective material. The light reflecting material may comprise titanium dioxide particles, for example.

Above-mentioned acrylic glue has colorless transparent, higher light transmissivity (for example light transmissivity can be more than or equal to 90%) and the advantage such as the bonding strength is good, can make and have good adhesion between each film in light adjustment layer 3 like this, make light adjustment layer 3 and first substrate 1, each luminescent device 2, all have good adhesion between the second substrate 4, can be when the connectivity between reinforcing each luminescent device 2 and the first substrate 1, avoid appearing the condition that second substrate 4 or light adjustment layer 3 drop.

In some embodiments, as shown in fig. 7, among the plurality of light emitting devices 2 included in the display substrate 100, each of the light emitting devices 2 includes: a third substrate 22, and a light-emitting layer 21 provided on the third substrate 22 side. The light-emitting layer 21 is adjacent to the first substrate 1 with respect to a third substrate 22.

Next, as shown in fig. 11, the structure of the light emitting device 2 will be schematically described by taking the light emitting device 2 as a Mini LED as an example.

As shown in fig. 11, the Mini LED includes a third substrate 22, an N-type semiconductor layer 23, a light emitting layer 21, a P-type semiconductor layer 24, a current blocking layer 25, a conductive layer 26, a bragg reflection layer 27, a cathode electrode lead 28, and an anode electrode lead 29, which are sequentially stacked, wherein the cathode electrode lead 28 is connected to the N-type semiconductor layer 23, and the anode electrode lead 29 is connected to the conductive layer 26.

In the case where the structure shown in fig. 11 is applied to the structure shown in fig. 12, the cathode electrode pin 28 may be connected to the electrode lead 13 through the cathode pad 14, and the anode electrode pin 29 may be connected to the driving transistor 12 through the anode pad 15.

In this embodiment, the light emitting layers 21 can emit light, so that the light emitted from each light emitting layer 21 can be emitted to the outside after sequentially passing through the third substrate 22, the light ray adjusting layer 3, and the second substrate 4.

In some examples, in the case where the light ray adjustment layer 3 includes the second sub light ray adjustment layer 32, the refractive index of the third substrate 22 is larger than the refractive index of the second sub light ray adjustment layer 32.

Since the refractive index of the second sub light ray adjusting layer 32 is greater than the refractive index of the second substrate 4, and the refractive index of the second substrate 4 is greater than the refractive index of the external atmosphere, the refractive index of each medium through which light emitted from the light emitting layer 21 needs to pass can be gradually reduced according to a certain gradient in the process of emitting the light to the outside by setting the refractive index of the third substrate 22 to be greater than the refractive index of the second sub light ray adjusting layer 32. Compared with the way that light rays directly irradiate into the external atmosphere, the light-emitting device is beneficial to guiding the light rays to irradiate, weakening and even avoiding the occurrence of total reflection, and improving the light-emitting efficiency.

Illustratively, the material of the third substrate 22 may include a sapphire material, and the refractive index of the third substrate 22 may be about 1.77. For example, the refractive index may be 1.76, 1.77, 1.78, or the like.

In some examples, in a case where the light ray adjustment layer 3 includes the third sub light ray adjustment layer 33, a positional relationship between the third sub light ray adjustment layer 33 and the plurality of light emitting devices 2 away from the surface of the first substrate 1 may further include: with respect to the first substrate 1, the third sub light adjustment layer 33 is higher than the surface of the plurality of light emitting devices 2 away from the first substrate 1, away from the surface of the first substrate 1. This ensures that light directed to the third light sub-ray adjustment layer 33 can be substantially all reflected back into the light emitting device 2, avoiding the occurrence of a phenomenon in which the reflected light is directed to an adjacent light emitting device 2 and causes color mixing.

In some embodiments, as shown in fig. 12, the display substrate 100 further includes a reflective layer 5 disposed in the gap between the cathode pad 14 and the anode pad 15, the reflective layer 5 being located at a side of the plurality of light emitting devices 2 adjacent to the first substrate 1.

By providing the reflective layer 5 on the side of the plurality of light emitting devices 2 close to the first substrate 1, light emitted to the reflective layer 5 can be reflected by the reflective layer 5 into the plurality of light emitting devices 2 and emitted to the outside through the side surface of the plurality of light emitting devices 2 away from the first substrate 1. This is advantageous for improving the utilization rate of the light emitted from the plurality of light emitting devices 2, improving the luminous efficiency of the display substrate 100, and reducing the power consumption of the display substrate 100.

Illustratively, the material of the reflective layer 5 may be white ink having a high reflectance.

In some embodiments, a side surface of the second substrate 4 away from the first substrate 1 may be a flat surface. Of course, as shown in fig. 8 and 9, the surface of the second substrate 4 on the side away from the first substrate 1 may also be provided with a plurality of microstructures 41. The plurality of microstructures 41 are configured to change a propagation direction of at least a portion of light rays from the plurality of light emitting devices 2 and passing through the second substrate 4.

Here, the shapes of the plurality of microstructures 41 are related to the change of the propagation direction of at least a part of the light passing through the second substrate 4.

In some examples, as shown in fig. 8, the surface shape of the plurality of microstructures 41 includes at least one of a pyramid and a wedge. The tips of the pyramids or wedges are located at the side remote from the second substrate 41. At this time, the plurality of microstructures 41 can collect at least a portion of the light from the plurality of light emitting devices 2 passing through the second substrate 4, which is beneficial to improving the display brightness of the display substrate 100.

Here, the size of the microstructure 41 may be selectively set according to actual needs. Illustratively, the height of the microstructure 41 (i.e., the dimension of the microstructure 41 in the direction perpendicular to the first substrate 1) may be about 12 μm, and the width of the microstructure 41 (i.e., the dimension of the junction of the microstructure 41 and the second substrate 4 as shown in fig. 9) may be about 24 μm. For example, the height of microstructures 41 may be 11 μm, 12 μm, or 13 μm, etc., and the width of microstructures 41 may be 23 μm, 24 μm, or 25 μm, etc.

In other examples, as shown in fig. 9, the surface shape of the plurality of microstructures 41 includes at least one of a curved surface and a spherical surface. At this time, the microstructures 41 can diffuse at least a portion of the light from the light emitting devices 2 passing through the second substrate 4, thereby improving the uniformity of the light emitted from the display substrate 100 and preventing the surface of the display substrate 100 from generating glare.

Here, the size of the microstructure 41 may be selectively set according to actual needs. Illustratively, the diameter of the microstructure 41 may be 20 μm to 30 μm, and the height of the microstructure 41 (i.e., the dimension of the microstructure 41 in the direction perpendicular to the first substrate 1) may be about 10 μm. For example, the diameter of microstructures 41 can be 20 μm, 23 μm, 27 μm, or 30 μm, etc., and the height of microstructures 41 can be 9 μm, 10 μm, or 11 μm, etc.

In some examples, the plurality of microstructures is a unitary structure with the second substrate 4. This is advantageous in simplifying the structure of the display substrate 100.

For example, an etching process may be used to etch a surface of the second substrate 4 away from the first substrate 1, so as to form the plurality of microstructures 41. Since the second substrate 4 has a certain hardness, the plurality of microstructures 41 formed by the etching process have a very stable structure and can be prevented from being deformed.

In addition, in some embodiments, the display substrate 100 may be applied to a liquid crystal display device as a light source in a backlight module of the liquid crystal display device.

At this time, as shown in fig. 10, the light ray adjustment layer 3 may include: a third sub light ray adjusting layer 33 located in the gap between the plurality of light emitting devices 2, and a second sub light ray adjusting layer 32 disposed on a side of the third sub light ray adjusting layer 33 away from the first substrate 1. Wherein, relative to the first substrate 1, the third sub light ray regulation layer 33 is far away from the surface of the first substrate 1 and lower than the surface of the light emitting layer 21 in the plurality of light emitting devices 2 far away from the first substrate 1; the second sub light ray regulation layer 32 is higher than the surface of the plurality of light emitting devices 2 away from the first substrate 1, away from the surface of the first substrate 1. Therefore, the third sub light ray adjusting layer 33 can be used for comprehensively reflecting the light rays emitted from the plurality of light emitting devices 2 from all directions, and the second sub light ray adjusting layer 32 and the second substrate 4 are used for guiding the light rays, so that the phenomenon of total reflection is avoided, and the brightness displayed by the display substrate 100 can be effectively increased.

On this basis, the display substrate 100 further includes quantum dot thin films disposed on the second substrate 4 away from the first substrate 1 and respectively located in the plurality of sub-pixel regions. Illustratively, the plurality of light emitting devices 2 each emit blue light, which is converted into light of a plurality of colors, such as red light or green light, after passing through the quantum dot thin films in the plurality of sub-pixel regions.

Some embodiments of the present disclosure provide a method of manufacturing a display substrate. As shown in fig. 14, the method for manufacturing the display substrate includes S100 to S300.

S100, as shown in (a) and (b) of fig. 15 and (a) and (b) of fig. 16, a first substrate 1 is provided, and a plurality of light emitting devices 2 spaced from each other are disposed on one side of the first substrate 1.

In some examples, the plurality of light emitting devices 2 may include Mini LEDs, or may also include micro LEDs. When the plurality of light emitting devices 2 are disposed on one side of the first substrate 1, the plurality of light emitting devices 2 may be transferred to one side of the first substrate 1 using, for example, a mass transfer Technology (MassTransfer Technology).

Here, as for the structure of the first substrate 1, the structures of the plurality of light emitting devices 2, and the connection between the first substrate 1 and the plurality of light emitting devices 2, reference may be made to the description in some of the above embodiments, and details are not repeated here.

S200, as shown in fig. 15 (c) and fig. 16 (c), providing a second substrate 4, and forming a light adjusting layer 3 on one side of the second substrate 4 by using a light absorbing material.

Illustratively, the second substrate 4 may be a PET substrate, that is, the second substrate 4 may be a thin film structure made of PET.

In some examples, the light adjusting layer 3 is formed on one side of the second substrate 4, including: a material for forming the light adjusting layer 3 is coated on one side of the second substrate 4 and cured to form the light adjusting layer 3.

In some examples, as shown in fig. 15 (c) and fig. 16 (c), the light ray regulation layer 3 includes a first sub light ray regulation layer 31 and a second sub light ray regulation layer 32 which are stacked.

At this time, the light adjusting layer 3 is formed on one side of the second substrate 4, and may include, for example: coating a material for forming the second sub light adjusting layer 32 on one side of the second substrate 4, and curing to form the second sub light adjusting layer 32; coating a material for forming the first sub light adjusting layer 31 on another film (e.g., a release film) and curing to form the first sub light adjusting layer 31; then, the first sub light ray adjustment layer 31 and the second sub light ray adjustment layer 32 are laminated, and the film attached to the first sub light ray adjustment layer 31 side is removed, so that the light ray adjustment layer 3 formed on the second substrate 4 side can be obtained.

S300, as shown in fig. 15 (d) and (e) and fig. 16 (d) and (e), a pressing process is used to press the first substrate 1 formed with the plurality of light emitting devices 2 and the second substrate 4 formed with the light adjusting layer 3, so that the plurality of light emitting devices 2 are embedded in the light adjusting layer 3, and a portion of the light adjusting layer 3 is sunk into the gap between the plurality of light emitting devices 2, and another portion is located on a side surface of the plurality of light emitting devices 2 away from the first substrate 1.

In some examples, the material of the light adjusting layer 3 further includes acrylic glue.

Since the acrylic adhesive has the advantage of being cured at room temperature or at intermediate temperature, in the above S200, when the light ray adjustment layer 3 is formed on one side of the second substrate 4, the material forming the light ray adjustment layer 3 can be cured at room temperature or at intermediate temperature, so that an additional curing operation can be avoided, which is beneficial to simplifying the preparation process of the display substrate 100 and saving the cost for preparing the display substrate 100.

Because the acrylic adhesive has certain elasticity and the function of filling up the offset, in the process of laminating the first substrate 1 on which the plurality of light-emitting devices 2 are formed and the second substrate 4 on which the light adjusting layer 3 is formed, the plurality of light-emitting devices 2 can gradually extend into the light adjusting layer 3 until the plurality of light-emitting devices 2 are completely embedded into the light adjusting layer 3; a part of the light ray adjusting layer 3 can fill the gaps between the plurality of light emitting devices 2 until the gaps between the plurality of light emitting devices 2 are filled.

The other part of the light ray adjusting layer 3 is located on the surface of one side, far away from the first substrate 1, of the plurality of light emitting devices 2, namely between the plurality of light emitting devices 2 and the second substrate 4, so that the plurality of light emitting devices 2 can be protected by the other part of the light ray adjusting layer 3, and the second substrate 4 is prevented from being in direct contact with the plurality of light emitting devices 2 to damage the light emitting devices 2.

According to the manufacturing method of the display substrate 100 provided by some embodiments of the present disclosure, the light ray adjusting layer 3 is formed on one side of the second substrate 4, and then the pressing process is adopted to press the first substrate 1 on which the plurality of light emitting devices 2 are formed and the second substrate 4 on which the light ray adjusting layer 3 is formed, so that the plurality of light emitting devices 2 are embedded in the light ray adjusting layer 3, and one part of the light ray adjusting layer 3 is sunk into the gap between the plurality of light emitting devices 2, and the other part is located on the surface of one side of the plurality of light emitting devices 2 far away from the first substrate 1, and at least one part of light rays emitted to the light ray adjusting layer 3 can be absorbed by the light ray adjusting layer 3, so that the contrast of the display substrate 100 is improved, and the power consumption of the display substrate 100 is not improved. Moreover, compared with the related art, the preparation method of the display substrate 100 provided by some embodiments of the present disclosure has a simple process and is easy to operate, and the light ray adjusting layer 3 is prevented from being ground, so that the surface of the display substrate 100 is prevented from being whitened, and the surface of the display substrate 100 has higher consistency.

In some embodiments, the types of the pressing process include a plurality.

Illustratively, the bonding process may include a vacuum bonding process.

As shown in fig. 15 (d), in the process of bonding the first substrate 1 on which the plurality of light emitting devices 2 are formed and the second substrate 4 on which the light adjusting layer 3 is formed by using a vacuum bonding process, the second substrate 4 on which the light adjusting layer 3 is formed may be integrally bonded while performing a vacuum pumping operation, so that the light adjusting layer 3 is close to the surfaces of the plurality of light emitting devices 2 and may be substantially simultaneously in contact with the plurality of light emitting devices 2, so that the plurality of light emitting devices 2 may substantially simultaneously extend into and be embedded into the light adjusting layer 3. Also, formation of bubbles between the light adjusting layer 3 and the first substrate 1 is also avoided.

Illustratively, the bonding process may include a rolling process.

As shown in fig. 16 (d), in the process of bonding the first substrate 1 on which the plurality of light emitting devices 2 are formed and the second substrate 4 on which the light adjusting layer 3 is formed by using a rolling process, one end (for example, the right end shown in fig. 16) of the first substrate 1 on which the plurality of light emitting devices 2 are formed and one end (for example, the right end shown in fig. 16) of the second substrate 4 on which the light adjusting layer 3 is formed may be bonded first, so that the light emitting devices 2 at the one end are completely embedded in the light adjusting layer 3, and then the bonding position is gradually moved to the opposite end (for example, the left end shown in fig. 16) so that the plurality of light emitting devices 2 are sequentially embedded in the light adjusting layer 3 from one end of the first substrate 1 to the opposite end, and then a temperature-raising and defoaming operation is performed. This may reduce or even eliminate possible air bubbles between the light regulating layer 3 and the first substrate 1.

In some embodiments, in the case where the light adjusting layer 3 includes a plurality of thin films, the hardness of the thin film on the side close to the plurality of light emitting devices 2 is smaller than that of the thin film on the side far from the plurality of light emitting devices 2.

For example, the light ray regulation layer 3 includes a first sub light ray regulation layer 31 and a second sub light ray regulation layer 32 which are stacked. At this time, the hardness of the first sub light ray adjustment layer 31 is smaller than that of the second sub light ray adjustment layer 32. In this way, in the process of laminating the first substrate 1 on which the plurality of light emitting devices 2 are formed and the second substrate 4 on which the light ray adjusting layer 3 is formed, it is possible to easily insert and insert the plurality of light emitting devices 2 into the first sub light ray adjusting layer 31. For first substrate 1, a side surface of first substrate 1 is kept away from to first sub light regulation layer 31, be less than under the condition that a side surface of first substrate 1 was kept away from to a plurality of luminescent device 2, can slow down and be convenient for control a plurality of luminescent device 2 and stretch into the speed of second sub light regulation layer 32, avoid appearing a plurality of luminescent device 2 and pierce through second sub light regulation layer 32, the condition that contacts with second substrate 2, and then be favorable to avoiding appearing the condition that a plurality of luminescent device 2 were damaged.

In addition, some embodiments of the present disclosure may also control the speed at which the plurality of light emitting devices 2 protrude into the light adjusting layer 3 by controlling the thickness of the second sub light adjusting layer 32.

Some embodiments of the present disclosure provide a display device 200. As shown in fig. 17, the display device 200 includes the display substrate 100 provided in some embodiments as described above.

The display substrate 100 included in the display device 200 has the same structure and advantages as the display substrate 100 provided in some embodiments, and the description thereof is omitted here.

In some examples, the display device 200 further includes: a housing for mounting the display substrate 100 described above, and/or a camera mounted on the display substrate 100.

In some embodiments, the display device 200 is any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, and a navigator.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art will appreciate that changes or substitutions within the technical scope of the present disclosure are included in the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A display substrate, comprising:

a first substrate;

a plurality of light emitting devices disposed at one side of the first substrate, the plurality of light emitting devices being spaced apart from each other;

a light adjusting layer located in gaps between the plurality of light emitting devices and on a side surface of the plurality of light emitting devices away from the first substrate, so that at least one light emitting device is surrounded by the light adjusting layer; the material of the light ray adjusting layer comprises a light absorbing material configured to absorb at least a portion of the light rays directed to the light ray adjusting layer; and the number of the first and second groups,

a second substrate covering the light adjusting layer.

2. The display substrate of claim 1, wherein the light regulating layer comprises:

a first sub light ray adjustment layer positioned in a gap between the plurality of light emitting devices; relative to the first substrate, the surface, far away from the first substrate, of the first sub light ray adjusting layer is flush with the surface, far away from the first substrate, of the plurality of light emitting devices, or is higher or lower than the surface, far away from the first substrate, of the plurality of light emitting devices; the material of the first sub light ray adjustment layer comprises a light absorbing material configured to absorb at least a portion of light rays emitted to the first sub light ray adjustment layer; and the number of the first and second groups,

the second sub light ray adjusting layer is arranged on one side, far away from the first substrate, of the first sub light ray adjusting layer; relative to the first substrate, the surface, far away from the first substrate, of the second sub light ray adjusting layer is higher than the surface, far away from the first substrate, of the plurality of light emitting devices; the second sub-light ray adjusting layer is a transparent film.

3. The display substrate according to claim 2, wherein in a case where the first sub light adjustment layer is away from a surface of the first substrate with respect to the first substrate lower than a surface of the plurality of light emitting devices away from the first substrate,

the second sub light ray adjusting layer comprises a first portion and a second portion, orthographic projections of the first portion on the first substrate are overlapped with orthographic projections of the plurality of light emitting devices on the first substrate, orthographic projections of the second portion on the first substrate are overlapped with orthographic projections of the first sub light ray adjusting layer on the first substrate, the thickness range of the first portion is 20-100 mu m, and the thickness range of the second portion is 50-100 mu m.

4. The display substrate of claim 2, wherein a refractive index of the second sub light ray adjustment layer is greater than a refractive index of the second substrate.

5. The display substrate of claim 2, wherein a distance between a surface of the first sub light ray adjustment layer away from the first substrate and the first substrate is 80% to 120% of a thickness of the plurality of light emitting devices.

6. The display substrate of claim 2, wherein the light regulating layer further comprises:

a third sub light ray adjusting layer located in a gap between the plurality of light emitting devices and disposed between the first sub light ray adjusting layer and the first substrate; relative to the first substrate, the surface, far away from the first substrate, of the third sub light ray adjusting layer is flush with the surface, far away from the first substrate, of the plurality of light emitting devices, or is lower than the surface, far away from the first substrate, of the plurality of light emitting devices;

the material of the third sub light ray regulation layer includes a light reflective material configured to reflect light incident into the third sub light ray regulation layer from the plurality of light emitting devices back into the plurality of light emitting devices.

7. The display substrate of claim 1, wherein the light regulating layer comprises:

a third sub light ray adjustment layer positioned in the gap between the plurality of light emitting devices; relative to the first substrate, the surface, far away from the first substrate, of the third sub light ray adjusting layer is flush with the surface, far away from the first substrate, of the plurality of light emitting devices, or is lower than the surface, far away from the first substrate, of the plurality of light emitting devices; the material of the third sub light ray regulation layer includes a light reflective material configured to reflect light incident into the third sub light ray regulation layer from the plurality of light emitting devices back into the plurality of light emitting devices; and the number of the first and second groups,

the first sub light ray adjusting layer is arranged on one side, far away from the first substrate, of the third sub light ray adjusting layer; relative to the first substrate, the surface, far away from the first substrate, of the first sub light ray adjusting layer is higher than the surface, far away from the first substrate, of the plurality of light emitting devices; the material of the first sub light ray adjustment layer includes a light absorbing material configured to absorb at least a portion of the light rays emitted to the first sub light ray adjustment layer.

8. The display substrate of claim 6 or 7, wherein the reflectivity of the third sub light adjusting layer is greater than or equal to 70%.

9. A display substrate according to any one of claims 2 to 7, wherein each light emitting device comprises:

a third substrate; and the number of the first and second groups,

a light-emitting layer provided on one side of the third substrate; the light emitting layer is adjacent to the first substrate with respect to the third substrate.

10. The display substrate according to claim 9, wherein in a case where the light ray adjustment layer includes a second sub light ray adjustment layer, a refractive index of the third substrate is greater than a refractive index of the second sub light ray adjustment layer.

11. The display substrate according to claim 9, wherein in a case where the light ray adjustment layer includes a third sub light ray adjustment layer, a surface of the third sub light ray adjustment layer which is remote from the first substrate is higher than a surface of the plurality of light emitting devices which is remote from the first substrate with respect to the first substrate.

12. The display substrate according to any one of claims 2 to 7,

under the condition that the light ray adjusting layer comprises the first sub light ray adjusting layer, the material of the first sub light ray adjusting layer comprises acrylic glue doped with light absorbing materials;

under the condition that the light ray adjusting layer comprises a second sub light ray adjusting layer, the material of the second sub light ray adjusting layer comprises acrylic glue;

under the condition that the light ray adjusting layer comprises a third sub light ray adjusting layer, the material of the third sub light ray adjusting layer comprises acrylic glue doped with a reflective material.

13. The display substrate according to any one of claims 1 to 7, wherein a surface of the second substrate on a side away from the first substrate is provided with a plurality of microstructures;

the plurality of microstructures is configured to change a propagation direction of at least a portion of light rays from the plurality of light emitting devices and through the second substrate.

14. The display substrate of claim 13, wherein the surface shape of the plurality of microstructures comprises at least one of a pyramid, a wedge, a cambered surface, and a spherical surface.

15. A display device, comprising: a display substrate according to any one of claims 1 to 14.