CN116565102A - Light-emitting substrate, manufacturing method thereof, and display device - Google Patents

Abstract

The invention relates to a light-emitting substrate, a preparation method thereof, and a display device. The light-emitting substrate includes a substrate and a light-emitting device; the number of light-emitting devices is multiple, and the plurality of light-emitting devices are arranged at intervals on the substrate, and spacers are arranged between adjacent light-emitting devices; the top of the spacer is higher than the light-emitting device surface of the light-emitting device to define the light-emitting angle of the light-emitting device; the barrier member on the peripheral side of each light-emitting device has an inner slope surface inclined to the light-emitting direction of the light-emitting device between its top and the light-emitting device, and the inner slope can guide the light Reflected towards the area between adjacent light emitting devices. The spacer in the above-mentioned light-emitting substrate can play the role of limiting the light-emitting angle of the light-emitting device, and can also play the role of reflecting light in an oblique upward direction, thus improving the utilization rate of the light emitted by the light-emitting device and improving the efficiency of the light-emitting substrate. The luminous brightness; can also reduce the dark area between adjacent light-emitting devices, increase the brightness of the dark area, and can increase the light uniformity of the light-emitting substrate.

Description

Light-emitting substrate, manufacturing method thereof, and display device

technical field

The invention relates to the field of display technology, in particular to a light-emitting substrate, a preparation method thereof, and a display device.

Background technique

Mini LED and Micro LED devices are used in the display field for two purposes: one is used as a backlight, and at this time, it functions as a surface light source to emit light in the direction of the liquid crystal cell; the other is direct display, that is, every Each Mini LED or Micro LED device acts as a pixel point, and each Mini LED or Micro LED device directly emits light of corresponding brightness and color without passing through the liquid crystal box.

When Mini LED and Micro LED devices are used as backlight sources, the backlight source generally chooses a direct-down design, and the Mini LED and Micro LED devices are located at the bottom of the backlight source (this is convenient for local dimming), and are set above the Mini LED and Micro LED devices. There is a diffuser plate, which is used to increase the uniformity of the light output. However, only through the diffusion plate, the backlight cannot achieve uniform light output, and uneven brightness is prone to occur on the light output surface of the backlight.

When Mini LED and Micro LED devices are used for direct display, there is no diffuser plate above the Mini LED and Micro LED devices, so that it is easy to see the dark areas between adjacent pixels when viewed at close range, resulting in The visual effect is not good, with obvious graininess.

Contents of the invention

The present invention provides a light-emitting substrate, a preparation method thereof, and a display device to solve the above-mentioned technical problem of uneven light emitting brightness of the light-emitting substrate in the prior art.

The light-emitting substrate provided by the present invention includes a substrate and a light-emitting device; the number of the light-emitting devices is multiple, and a plurality of the light-emitting devices are arranged at intervals on the substrate, and barriers are arranged between adjacent light-emitting devices parts; the top of the barrier is higher than the surface of the light-emitting device to limit the light-emitting angle of the light-emitting device; the barriers on the peripheral side of each light-emitting device have a direction between the top and the light-emitting device The light-emitting device has an inclined inner slope, the inner slope can reflect light, and reflect the light to the area between adjacent light-emitting devices.

Wherein, the reflectivity of the inner slope of the barrier is greater than a set value.

Wherein, the inner slope of the barrier is provided with a reflective layer; or, the barrier is made of a material with a reflectivity higher than a set value.

Wherein, the inner slope of the barrier member is a plane, and the inclination angle of the inner slope ranges from 0 to 75 degrees.

Wherein, the barrier is made of heat-absorbing material.

Wherein, the light-emitting substrate further includes a first diffusion layer formed on and in contact with the light-emitting device and the spacer.

Wherein, the light-emitting substrate further includes a second diffusion layer formed on the first diffusion layer and stacked with the first diffusion layer.

Wherein, the number of the second diffusion layers is multiple, and the multiple second diffusion layers are stacked.

Wherein, the protrusion height of the barrier member relative to the surface of the light emitting device is no more than half of the thickness of the first diffusion layer.

The preparation method of the light-emitting substrate provided by the present invention comprises:

Step S10, forming a protruding barrier and a plurality of installation grooves surrounded by the barrier on the substrate;

Step S20, transferring and installing the light emitting device into each installation groove;

Step S30, forming a first diffusion layer on the light emitting device and the spacer.

Wherein, the preparation method of the light-emitting substrate also includes:

Step S40, forming a second diffusion layer on the first diffusion layer.

Wherein, the preparation method of the light-emitting substrate also includes:

Step S11, forming a reflective layer on the surface of the barrier.

The display device provided by the present invention comprises the above-mentioned light-emitting substrate.

Compared with the prior art, the above-mentioned light-emitting substrate and its preparation method and display device provided by the present invention have the following advantages:

In the light-emitting substrate and its preparation method and display device provided by the present invention, a spacer is provided between adjacent light-emitting devices, and the top of the spacer is higher than the surface of the light-emitting device. Based on this structure, the spacer can play The role of limiting the light emitting angle of the light emitting device. At the same time, the barrier can also reflect the light emitted by the light-emitting device. The inner slope of the barrier can be inclined upwards, that is, reflect the light toward the light-emitting direction of the light-emitting device, which actually improves the brightness of the light-emitting device. The utilization rate of the emitted light can improve the luminous brightness of the light-emitting substrate; moreover, since the inner slope faces obliquely upward, the partially reflected light can be irradiated outside the light-emitting device and between adjacent light-emitting devices area, so that the dark area between adjacent light emitting devices can be reduced, and the brightness of the dark area can be increased to increase the light uniformity of the light emitting substrate.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings without paying creative labor.

FIG. 1 is a schematic structural view of a light-emitting substrate in an embodiment of the present invention;

2 is a schematic structural view of a light-emitting substrate in another embodiment of the present invention;

Fig. 3 is a partially enlarged schematic diagram of area A in Fig. 2;

4 is a schematic flow chart of a method for preparing a light-emitting substrate in an embodiment of the present invention;

5 is a schematic structural view of a light-emitting substrate in another embodiment of the present invention;

6 is a schematic structural view of a light-emitting substrate in another embodiment of the present invention;

7 is a schematic diagram of forming a barrier on the substrate in step S10;

Fig. 8 is a schematic diagram of forming a mounting groove on the barrier in step S10;

9 is a schematic diagram of forming a reflective layer on the surface of the barrier in step S11;

FIG. 10 is a schematic diagram of installing a light emitting device into an installation groove in step S20;

FIG. 11 is a schematic diagram of forming a first diffusion layer on the light emitting device and the spacer in step S30;

12 is a schematic diagram of forming a second diffusion layer on the first diffusion layer in step S40;

Fig. 13 is a schematic diagram of step S10 in an alternative embodiment;

Fig. 14 is a schematic structural diagram of a display device in an embodiment of the present invention.

In the picture:

10 - substrate; 11 - light emitting device; 12 - barrier; 121 - inner slope; 13 - reflection layer; 14 - first diffusion layer; 15 - second diffusion layer.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiments of the light-emitting substrate and the display device provided by the present invention will be described below with reference to the accompanying drawings.

In an embodiment of the light-emitting substrate of the present invention, referring to FIG. 1, the light-emitting substrate includes a substrate 10 and a light-emitting device 11; A barrier 12 is arranged between the light emitting devices 11 , and the top of the barrier 12 is higher than the surface of the light emitting device 11 to limit the light emitting angle of the light emitting device 11 . The partition 12 on the peripheral side of each light emitting device 11 has an inner slope surface 121 inclined to the light emitting direction of the light emitting device 11 between its top end and the light emitting device 11, and the inner slope surface 121 can reflect light and reflect the light to the opposite direction. The area between adjacent light-emitting devices 11.

In this embodiment, the light-emitting substrate is used to provide light to the outside, and the light provided by the light-emitting substrate can be used as a surface light source, such as in a liquid crystal display panel, or can be directly used for display based on the light emitted by each light-emitting device 11. . The light emitting device 11 in this embodiment may specifically be an LED (Light Emitting Diode), preferably a Mini LED and a Micro LED with a smaller size.

In this embodiment, the top of the barrier member 12 arranged between adjacent light emitting devices 11 is higher than the surface of the light emitting device 11, based on this structure, the barrier member 12 can play a role in defining the light emitting angle of the light emitting device 11. effect. Specifically, when the inner slope 121 of the barrier 12 is a plane or concave, the light emitting angle of the light emitting device 11 is determined by the top of the barrier 12; when the inner slope 121 of the barrier 12 is convex, the light emitting angle of the light emitting device The light emitting angle of 11 is determined by the top of the barrier 12 or the most protruding part of the inner slope 121 . It should be noted that, in this embodiment, the barrier 12 is set to limit the light output angle of the light emitting device 11, the starting point is not to collimate the light emitted by the light emitting device 11, but to make the barrier 12 have The effect of reflecting light, and reflecting the light to the dark area between adjacent light emitting devices 11 (the so-called dark area refers to the area between adjacent light emitting devices 11 that is not directly opposite to the light emitting device 11; the light emitted by the light emitting device 11 The light is directly irradiated on the area facing it, and the brightness of this part of the area is relatively high, which is a bright area; while the area between adjacent light-emitting devices 11 is not directly opposite to the light-emitting device 11, the light-emitting device 11 illuminates this part The light intensity of the area is lower than that of the area facing the light-emitting device 11, and the brightness of this part of the area is relatively low, which is a dark area). Based on this purpose, when the inner slope 121 is set on a concave surface, the concave amplitude of the concave surface It should not be too large, especially at the position adjacent to the top of the barrier member 12, the tangent direction of the concave surface should not be the light emitting direction of the light emitting device 11, as shown in Fig. There should be a certain angle in the vertical direction.

As for the barrier member 12 , it not only has the function of limiting the light emitting angle of the light emitting device 11 , but also can reflect the light emitted by the light emitting device 11 . Specifically, since the inner slope surface 121 of the barrier member 12 is inclined toward the light-emitting direction of the light emitting device 11 , referring to FIG. 1 , that is, the inner slope surface 121 is inclined toward the upper side (toward obliquely upward). When the light emitted by the light emitting device 11 is irradiated on the inner slope 121 , the inner slope 121 can reflect a part of the light upwards, that is, the light emitting direction. In this way, the utilization rate of the light emitted by the light-emitting device 11 is actually improved, and the luminous brightness of the light-emitting substrate can be improved.

Moreover, since the inner slope 121 faces obliquely upward, the part of the reflected light is also reflected obliquely upward, so that the light emitted by each light-emitting device 11 can be irradiated outside the light-emitting device 11 and connected to the adjacent light-emitting device 11. The area between the light emitting devices 11 reduces the dark area between adjacent light emitting devices 11 and increases the brightness of the dark area. Therefore, the light emitting uniformity of the light-emitting substrate can be increased.

In this embodiment, in addition to the light irradiated by the light-emitting device 11 on the barrier 12, the light that can be reflected by the barrier 12 also includes that the light-emitting device 11 illuminates upwards on other structures and is reflected downwards and irradiated on other structures. Light on barrier 12. The barrier 12 also reflects this part of the light upwards obliquely, the principle and process of which are the same as those described above, and will not be repeated here.

When the light-emitting substrate in this embodiment is used as a backlight source of a liquid crystal display panel, the dark area between adjacent light-emitting devices 11 is reduced, and the uniformity of light output is increased. For the liquid crystal display panel, a better display effect can be achieved.

When the light-emitting substrate in this embodiment is used for direct display, the reduction of the dark area between adjacent light-emitting devices 11 can reduce the probability of being seen when viewed at a close distance, reduce the graininess, and improve the display effect.

In an embodiment of the light-emitting substrate, the reflectivity of the inner slope surface 121 of the barrier member 12 is greater than a set value. Specifically, in order to realize the reflectivity, a reflective layer 13 may be provided on the inner slope surface 121 of the barrier 12 . Alternatively, the barrier member 12 is prepared by using a material with a reflectivity higher than a set value. For example, the set value can be determined as 90%. In this case, the reflectivity of silver (Ag) is 91%, which is greater than the set value. Therefore, the material of the barrier 12 can be silver (Ag), or the barrier A reflective layer 13 made of silver (Ag) may be formed on the surface of the blocking member 12 . Of course, the set value can also be determined as other higher values, or can also be determined as other lower values.

Through the above settings, the inner slope surface 121 of the barrier 12 has a higher reflectivity, and can reflect more light upwards obliquely, which can better improve the light utilization rate and luminous brightness, and improve the light output. uniformity effect.

In an embodiment of the light-emitting substrate, the inner slope 121 of the barrier member 12 is a plane, and the inclination angle of the inner slope 121 ranges from 0 to 75 degrees. Within this range of angles, even if the inclination angle of the inner slope 121 is selected as the maximum value, it can not only ensure that each light emitting device 11 has a sufficient light emitting angle, but also achieve a corresponding reflection effect through the inner slope 121 .

In an embodiment of the light-emitting substrate, the barrier 12 is made of a heat-absorbing material. The spacer 12 made of heat-absorbing material can absorb the heat generated by the light-emitting device 11 during the working process of the light-emitting substrate, so as to avoid device damage or other problems caused by overheating. Specifically, the heat-absorbing material used to prepare the barrier 12 may be selected as a phase change material or the like.

In actual implementation, in order to take into account the requirements of both heat absorption and light emission of the barrier 12, the material of the barrier 12 can be selected to be made of a heat-absorbing material with a reflectivity higher than the set value, or a heat-absorbing material. The barrier 12 is prepared from the material, but a separate reflective layer 13 is prepared on top of the barrier 12 .

It should be noted that, in this embodiment, the specific structural form of the barrier member 12 is not limited, as long as the barrier member 12 has a high point higher than the installation groove and the light emitting device 11, under this requirement, The barrier 12 can be shown as a triangle as shown in Figures 1 and 2, or as a trapezoid as shown in Figure 5, or as a combination of a triangle and a lower platform as shown in Figure 6, etc.

In an embodiment of the light emitting substrate, referring to FIG. 1 , the light emitting substrate further includes a first diffusion layer 14 formed on and in contact with the light emitting device 11 and the spacer 12 .

In this embodiment, the first diffusion layer 14 is directly formed on the light emitting device 11 and the spacer 12 , which is different from the pre-prepared diffusion plate in the prior art, and then the diffusion plate is fixed on the light emitting substrate. In this embodiment, the first diffusion layer 14 is directly formed on the light-emitting device 11 and the spacer 12, and the supporting column structure for connecting and fixing the diffusion plate to the light-emitting substrate can be omitted. The first diffusion layer 14 and the light-emitting device 11 1. There is no other structure between the partitions 12, and the distance between them is smaller; this helps to achieve a better light diffusion effect, helps to achieve better light uniformity, and can well meet the needs of users. As the performance requirements of the backlight.

In a further embodiment, the light-emitting substrate may further include a second diffusion layer 15 on the basis of the above-mentioned first diffusion layer 14. Referring to FIG. 2, the second diffusion layer 15 is formed on the first diffusion layer 14, and The first diffusion layers 14 are stacked. By disposing the second diffusion layer 15 , on the basis of the light diffusion performed by the first diffusion layer 14 , the light can be further uniformly mixed, so as to achieve better light uniformity.

In this embodiment, the second diffusion layer 15 can have the same technical effect as the diffusion plate in the prior art. Moreover, compared with the diffusion plate structure in the prior art, it needs to have a larger thickness in order to achieve a certain stiffness, while the second diffusion layer 15 in this embodiment is directly arranged on the light emitting device 11 and the barrier member 12 Therefore, the stiffness of the second diffusion layer 15 does not need to be increased by increasing the thickness, and a better thinning effect can be achieved when the thickness of the second diffusion layer 15 is reduced. Moreover, the first diffusion layer 14 and the second diffusion layer 15 of this embodiment can be more adaptable to bending, since the influence on the structure of the diffusion plate does not need to be considered when bending, the light-emitting substrate in this embodiment can better meet the requirements of curved surface display products. Require.

Specifically, the number of second diffusion layers 15 is multiple, and multiple second diffusion layers 15 are stacked. It can be understood that the number of second diffusion layers 15 is positively related to the uniformity of light output from the light-emitting substrate. In the case of more second diffusion layers 15 , the uniformity of light output that the light-emitting device can achieve is better.

In this embodiment, the first diffusion layer 14 and the second diffusion layer 15 can be made of selected resin materials, and the selected resin materials are filled with diffusion particles to achieve a good light diffusion effect. In this embodiment, the diffusion particles in the first diffusion layer 14 and the second diffusion layer 15 are not only distributed in the areas of the first diffusion layer 14 and the second diffusion layer 15 facing the light-emitting device 11, but also in the adjacent light-emitting The area facing the gap between the devices 11 is also filled with diffusion particles, which can achieve better and more sufficient diffusion effect.

In one embodiment of the light-emitting substrate, the height of the spacer 12 protruding relative to the surface of the light-emitting device 11 is no more than half of the thickness of the first diffusion layer 14 . With reference to FIG. 3 , the relationship between the thicknesses of the barrier member 12 and the first diffusion layer 14 can be expressed as:

The thickness H of the first diffusion layer 14 satisfies:

P/2×tanα≤H≤P×tanα.

Wherein, H is the thickness of the first diffusion layer 14, P is the distance between two adjacent light-emitting devices 11 (that is, the width of the barrier 12), and α is the light-emitting direction between the inner slope 121 and the light-emitting device 11 angle between.

In this embodiment, it is also possible to set the height of the barrier member 12 protruding relative to the light emitting device 11 (that is, the vertical distance between the highest point of the barrier member 12 and the light emitting device 11 in the illustration) not to exceed (P× √3)/2, so as to avoid problems such as the thicker thickness of the first diffusion layer 14 caused by the larger height of the barrier member 12 .

It can be understood that, the higher the height of the barrier 12, the more light reflected by the inner slope 121 of the barrier 12 will be irradiated on the opposite barrier 12 instead of directly illuminating into the first diffusion layer 14. Therefore, in this embodiment, setting the height of the barrier member 12 to be less than half of the thickness of the first diffusion layer 14 can ensure that more light reflected by each barrier member 12 will directly irradiate the first diffuser layer 14. In a diffusion layer 14, the area between adjacent light emitting devices 11 is irradiated, so that a better diffusion effect can be achieved, the dark area between adjacent light emitting devices 11 can be better reduced, and the dark area of the dark area can be improved. Brightness, also can better improve the light uniformity of the light-emitting substrate. On the other hand, in the case of ensuring the diffusion effect, the thickness of the first diffusion layer 14 can be set to be relatively small, thereby helping to reduce the overall thickness of the light-emitting substrate.

At the same time, the lower the height of the barrier member 12 is, the less it restricts the light emitting angle of the light emitting device 11 , and the light emitting device 11 can have a larger light emitting angle. Therefore, in the light-emitting substrate with this structure, the height of the spacer 12 will not significantly reduce the light-emitting angle of the light-emitting device 11 , and can also be used to enhance the uniformity of light-emitting from the light-emitting substrate. Moreover, the lower the height of the barrier member 12, the first diffusion layer 14 does not need to be set to a larger thickness in order to accommodate the barrier member 12 in the height direction, and like this, for the first diffusion layer 14, its thickness can be A corresponding reduction will eventually help to reduce the overall thickness of the light-emitting substrate.

In summary, in the light-emitting substrate provided by the above-mentioned embodiments of the present invention, the top of the spacer 12 disposed between adjacent light-emitting devices 11 is higher than the surface of the light-emitting device 11, based on this structure, the spacer 12 can Play a role in limiting the light emitting angle of the light emitting device 11 . At the same time, the partition 12 not only has the function of limiting the light emitting angle of the light emitting device 11, but also can reflect the light emitted by the light emitting device 11. The inner slope 121 of the partition 12 can be inclined upward, that is, Reflecting the light toward the light-emitting direction of the light-emitting device 11 actually improves the utilization rate of the light emitted by the light-emitting device 11 and improves the luminous brightness of the light-emitting substrate. Moreover, since the inner slope 121 faces obliquely upward, the partially reflected light can be irradiated outside the light-emitting device 11 and to the area between the adjacent light-emitting devices 11, thereby reducing the distance between adjacent light-emitting devices 11. The dark area in between, increasing the brightness of the dark area, can increase the light uniformity of the light-emitting substrate.

In an embodiment of the method for preparing a light-emitting substrate of the present invention, the method for preparing a light-emitting substrate includes the following steps S10-S40, see FIG. 4 .

Step S10 , forming a protruding barrier 12 and a plurality of installation grooves surrounded by the barrier 12 on the substrate 10 , as shown in FIGS. 7 and 8 .

In this step S10 , for example, the barrier members 12 may be formed by means of mold flat pressing, and when the barrier members 12 are formed, installation grooves are also formed in the area between the barrier members 12 . The installation groove surrounded by the barrier member 12 is used to place the light emitting device 11 , and the step of placing the light emitting device 11 in the installation groove can be seen in the subsequent step S20 . In one embodiment, the spacer 12 can be made of heat-absorbing material, and the spacer 12 supported by the heat-absorbing material can absorb the heat generated by the light-emitting device 11 during the working process of the light-emitting device 11, so as to prevent the light-emitting device 11 from The area where the device is located is overheated and causes damage to the device.

In one embodiment, the material used to prepare the barrier member 12 may be a material with a reflectivity higher than a set value. The barrier member 12 made in this way can better reflect light, thereby improving the utilization rate of the light emitted by the light emitting device 11 and achieving a better effect of uniform light output.

Certainly, in this step S10 , the barrier member 12 may also be made of a material whose reflectivity is lower than a set value. In this case, in order to achieve a better effect of reflecting light, after performing the above step S10 and before performing the subsequent step S20, the following step S11 may also be performed first:

In step S11 , a reflective layer 13 is formed on the surface of the barrier member 12 , as shown in FIG. 9 .

When forming the reflective layer 13 in this step S11 , a material having a reflectivity higher than a set value may be selected. Based on the reflective layer 13 , the light can be reflected obliquely upward, thereby improving the utilization rate of the light emitted by the light emitting device 11 and achieving a better effect of uniform light output.

In one embodiment, it is also possible to firstly form the barrier 12 outside the substrate 10 and form the installation groove on the barrier 12, and then connect the formed structure and the substrate 10 together by bonding or the like, such as Figure 13 shows.

Step S20, transfer and install the light emitting device 11 into each installation groove, as shown in FIG. 10 .

In this step S20, taking the light emitting device 11 as an example of Mini LED or Micro LED, the Mini LED or Micro LED device can be transferred into the mounting groove formed in step S10 by means of mass transfer. Moreover, based on the structure of the barrier 12 (the barrier 12 has an inner slope 121), during the mass transfer process, the Mini LED and Micro LED devices only need to fall on the barrier 12 on the side of the installation groove. The area will naturally slide into the installation groove, so that the Mini LED and Micro LED devices have a higher accuracy and success rate in the process of mass transfer.

Step S30 , forming a first diffusion layer 14 on the light emitting device 11 and the spacer 12 , as shown in FIG. 11 .

In step S30 , the resin material with diffusion particles can be formed on the formed light-emitting device 11 and spacer 12 by spraying, and dried and cured, so as to obtain the first diffusion layer 14 .

Step S40 , forming the second diffusion layer 15 on the first diffusion layer 14 , as shown in FIG. 12 .

In step S40 , a layer of OCA glue can be sprayed on the first diffusion layer 14 first, and then the second diffusion layer 15 is aligned and pasted on the first diffusion layer 14 .

The preparation method of the light-emitting substrate provided by the embodiment of the present invention, the light-emitting substrate prepared and formed is as described in the above-mentioned embodiment, and the preparation method of the light-emitting substrate provided by the embodiment of the present invention certainly has the same beneficial effect as the above-mentioned light-emitting substrate. Let me repeat.

In one embodiment of the display device of the present invention, the display device includes the above-mentioned light-emitting substrate.

As shown in FIG. 14 , in the display device, the light-emitting substrate can be used as a backlight source, and the light emitted by the backlight source can be irradiated into the liquid crystal cell to realize display.

In this embodiment, the display device may be a flat display device or a curved display device. For curved display devices (such as curved Mini LED display devices), the light-emitting substrates in the above embodiments are suitable for bending, and the structures of the first diffusion layer 14 and the second diffusion layer 15 will not hinder the bending, so The use requirement of the display device of the curved surface type can be met.

The display device according to the embodiment of the present invention includes the above-mentioned light-emitting substrate, of course, has the same beneficial effects as the above-mentioned light-emitting substrate, and will not be repeated here.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific embodiments of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Accordingly, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims (10)

1. A light-emitting substrate, characterized in that the light-emitting substrate comprises a substrate and a light-emitting device; the number of the light emitting devices is multiple, the multiple light emitting devices are arranged on the substrate at intervals, and a baffle is arranged between the adjacent light emitting devices; the top end of the barrier is higher than the surface of the light-emitting device so as to limit the light-emitting angle of the light-emitting device;

the barrier member on the peripheral side of each light emitting device has an inner slope inclined to the light emitting direction of the light emitting device between the tip end thereof and the light emitting device, the inner slope reflecting light and reflecting light to an area between adjacent light emitting devices.

2. The light-emitting device according to claim 1, wherein a reflective layer is provided on an inner slope of the barrier; or alternatively

The baffle is made of a material with reflectivity higher than a set value.

3. The light-emitting substrate according to claim 1, wherein the inner slope of the barrier is a plane, and the inclination angle of the inner slope ranges from 0 to 75 degrees.

4. The light emitting substrate of claim 1, further comprising a first diffusion layer formed and in contact over the light emitting device and barrier.

5. The light-emitting substrate according to claim 4, further comprising a second diffusion layer formed on the first diffusion layer and stacked with the first diffusion layer.

6. The light-emitting substrate according to claim 5, wherein the number of the second diffusion layers is plural, and the plural second diffusion layers are stacked.

7. The light-emitting substrate according to any one of claims 4 to 6, wherein a height by which the barrier member protrudes with respect to a surface of the light-emitting device is not more than one half of a thickness of the first diffusion layer.

8. The preparation method of the light-emitting substrate is characterized by comprising the following steps of:

step S10, forming a convex baffle piece and a plurality of mounting grooves surrounded by the baffle piece on a substrate;

step S20, transferring and mounting the light emitting device into each mounting groove;

in step S30, a first diffusion layer is formed on the light emitting device and the barrier.

9. The method for manufacturing a light-emitting substrate according to claim 8, further comprising:

step S40, forming a second diffusion layer on the first diffusion layer.

10. A display device comprising a housing and the light-emitting substrate according to any one of claims 1 to 7.