Light-emitting substrate, backlight module and display device

Abstract

The embodiment of the invention provides a light-emitting substrate, a backlight module and a display device, relates to the technical field of display, and aims to solve the problem of uneven display pictures and improve the brightness and peripheral lighting effect of the display device. The light-emitting substrate includes a substrate, a plurality of light-emitting devices, and a plurality of encapsulation lenses. The substrate comprises a light-emitting surface and a backlight surface, the light-emitting devices are arranged on one side of the light-emitting surface of the substrate, and the light-emitting devices are arrayed in the row direction and the column direction at intervals. And each packaging lens in the plurality of packaging lenses correspondingly covers one light-emitting device. Wherein the light-emitting substrate comprises a central area and an edge area surrounding the central area, and in the edge area, the center of the packaging lens is close to the central area relative to the center of the corresponding light-emitting device.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a light-emitting substrate, a backlight module, and a display device. Background Technology

[0002] Mini LED (Mini Light-Emitting Diode) display devices are display devices that use sub-millimeter light-emitting diodes as light-emitting devices. Compared with traditional light-emitting diodes, sub-millimeter light-emitting diodes have a size greater than or equal to 80μm and less than 500μm.

[0003] Mini LED displays can achieve higher contrast, more layered images, and more realistic visual effects, making them a promising candidate for the future market. Summary of the Invention

[0004] The purpose of this disclosure is to provide a light-emitting substrate, a backlight module, and a display device to improve the problem of uneven display images and enhance the brightness and peripheral light effect of the display device.

[0005] To achieve the above objectives, the embodiments of this disclosure provide the following technical solutions:

[0006] On one hand, a light-emitting substrate is provided. The light-emitting substrate includes a substrate, a plurality of light-emitting devices, and a plurality of encapsulation lenses. The substrate includes a light-emitting surface and a backlight surface. The plurality of light-emitting devices are disposed on one side of the light-emitting surface of the substrate, and the plurality of light-emitting devices are arranged in an array and spaced apart in the row and column directions. Each of the plurality of encapsulation lenses covers one of the light-emitting devices. The light-emitting substrate includes a central region and an edge region surrounding the central region. In the edge region, the center of each encapsulation lens is closer to the central region than the center of the corresponding light-emitting device.

[0007] By positioning the center of the encapsulation lens closer to the center of the corresponding light-emitting device, the light emitted by the light-emitting device located at the edge area is refracted by the encapsulation lens, increasing the amount of light emitted. This increases the light emission ratio of the display device at the edge area, thereby improving the brightness of the backlight in the edge area and enhancing the peripheral lighting effect of the display device.

[0008] In some embodiments, in the edge region, the minimum distance between the orthographic projection boundary of the encapsulation lens on the substrate and the orthographic projection boundary of the corresponding light-emitting device on the substrate is greater than or equal to 0.2 mm.

[0009] In some embodiments, in the edge region, the distance between the center of the encapsulation lens and the center of the corresponding light-emitting device is the offset distance S; the distance between the two intersection points of a straight line passing through the center of the encapsulation lens and the center of the corresponding light-emitting device and the boundary of the encapsulation lens is the first distance W; the distance between the two intersection points of a straight line passing through the center of the encapsulation lens and the center of the corresponding light-emitting device and the boundary of the light-emitting device is the second distance D; wherein, the offset distance S satisfies: S≤(W / 2)-(D / 2)-0.2.

[0010] In some embodiments, the offset distance ranges from 0.4 mm to 0.6 mm.

[0011] In some embodiments, the height of the encapsulated lens ranges from 0.5 mm to 1 mm; the diameter of the encapsulated lens ranges from 2 mm to 4 mm.

[0012] In some embodiments, the edge region includes a plurality of sub-edge regions, which are arranged sequentially around the central region along the direction from the center of the light-emitting substrate to the edge, wherein the offset distance corresponding to the sub-edge region closer to the central region is smaller than the offset distance corresponding to the sub-edge region farther from the central region.

[0013] In some embodiments, the offset distances corresponding to the plurality of sub-edge regions increase exponentially along the direction from the center of the light-emitting substrate to the edge.

[0014] In some embodiments, the edge region includes two sub-edge regions, the two sub-edge regions including a first sub-edge region and a second sub-edge region disposed adjacent to each other, wherein the second sub-edge region surrounds the center region, the first sub-edge region surrounds the second sub-edge region, and the offset distance corresponding to the first sub-edge region is greater than the offset distance corresponding to the second sub-edge region.

[0015] In some embodiments, the width of the first sub-edge region is less than or equal to the width of the second sub-edge region, the width of the first sub-edge region is the distance between the outer contour boundary and the inner contour boundary of the first sub-edge region, and the width of the second sub-edge region is the distance between the outer contour boundary and the inner contour boundary of the second sub-edge region, wherein the outer contour boundary of the second sub-edge region coincides with the inner contour boundary of the first sub-edge region.

[0016] In some embodiments, the ratio of the width of the first sub-edge region in the row direction to the size of the light-emitting substrate in the row direction ranges from 1:100 to 3:100, and the ratio of the width of the first sub-edge region in the column direction to the size of the light-emitting substrate in the column direction ranges from 1:100 to 3:100; the ratio of the width of the second sub-edge region in the row direction to the size of the light-emitting substrate in the row direction ranges from 3:100 to 1:10, and the ratio of the width of the second sub-edge region in the column direction to the size of the light-emitting substrate in the column direction ranges from 3:100 to 1:10.

[0017] In some embodiments, the first sub-edge region includes at least one first corner region, at least one first extension region, and at least one second extension region. The first corner region connects adjacent first extension regions and second extension regions, and the first corner region is located at the corner of the first sub-edge region. The second sub-edge region includes at least one second corner region, at least one third extension region, and at least one fourth extension region. The second corner region connects adjacent third extension regions and fourth extension regions, and the second corner region is located at the corner of the second sub-edge region. The first extension region and the third extension region extend along the column direction, the second extension region and the fourth extension region extend along the row direction, and the first corner region and the second corner region are in contact with each other at their closest vertices.

[0018] In some embodiments, in the first extension region, the center of the encapsulation lens is offset relative to the center of the corresponding light-emitting device by a first offset distance along the row direction toward the center region; in the second extension region, along the column direction, the offset distance between the center of the encapsulation lens and the center of the light-emitting device is a second offset distance; wherein, the first offset distance and the second offset distance are equal.

[0019] In some embodiments, in the first corner region, the center of the encapsulation lens is offset relative to the center of the corresponding light-emitting device by a first offset distance along the row direction toward the center region, and by a second offset distance along the column direction toward the center region.

[0020] In some embodiments, in the third extension region, the center of the encapsulation lens is offset by a third offset distance relative to the center of the corresponding light-emitting device along the row direction toward the central region; in the fourth extension region, the center of the encapsulation lens is offset by a fourth offset distance relative to the center of the corresponding light-emitting device along the column direction toward the central region; wherein the third offset distance and the fourth offset distance are equal, and both the third offset distance and the fourth offset distance are half of the first offset distance or the second offset distance.

[0021] In some embodiments, in the second corner region, the center of the encapsulation lens is offset relative to the center of the corresponding light-emitting device by a third offset distance along the row direction toward the center region, and by a fourth offset distance along the column direction toward the center region.

[0022] On the other hand, a backlight module is provided, including a light-emitting substrate as described in any of the embodiments above and a film assembly disposed on the side of the plurality of encapsulation lenses away from the substrate.

[0023] The backlight module described above has the same structure and beneficial technical effects as the light-emitting substrate provided in some of the above embodiments, and will not be described again here.

[0024] In some embodiments, the film assembly includes: a diffuser plate, a light-diffusing film, a quantum dot film, and a composite prism. The diffuser plate is disposed on the side of the plurality of encapsulation lenses away from the substrate; the light-diffusing film is disposed on the side of the diffuser plate away from the light-emitting substrate; and the quantum dot film is disposed on the side of the light-diffusing film away from the light-emitting substrate.

[0025] The composite prism is disposed on the side of the quantum dot film away from the light-emitting substrate.

[0026] In some embodiments, the backlight module further includes a frame surrounding the film assembly, and the edge of the backlight module is provided with a sidewall extending in the light emission direction, and the frame is disposed around the outer periphery of the sidewall.

[0027] In another aspect, a display device is provided, comprising: a backlight module as described in any of the embodiments of the other aspect above, and a display panel, the display panel being stacked on the light-emitting side of the backlight module.

[0028] The above-described display device has the same structure and beneficial technical effects as the backlight module provided in some of the above embodiments, and will not be described again here. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0030] Figure 1 This is a cross-sectional structural diagram of a liquid crystal display device provided according to some embodiments of the related art;

[0031] Figure 2 This is a plan view of a display device provided according to some embodiments of the present disclosure;

[0032] Figure 3 This is a stacked structure diagram of a display device provided according to some embodiments of the present disclosure;

[0033] Figure 4 This is a cross-sectional structural diagram of a light-emitting substrate provided according to some embodiments of the present disclosure;

[0034] Figure 5A This is a light-emitting optical path diagram showing the light-emitting device and its corresponding encapsulated lens facing each other according to some embodiments of this disclosure;

[0035] Figure 5B This is a light-emitting optical path diagram showing the offset arrangement of a light-emitting device and a corresponding encapsulated lens according to some embodiments of this disclosure;

[0036] Figure 6A This is a cross-sectional structural diagram of a light-emitting device and a corresponding encapsulated lens provided according to some embodiments of the present disclosure;

[0037] Figure 6B This is a planar structural diagram of a light-emitting device and a corresponding encapsulated lens provided according to some embodiments of the present disclosure;

[0038] Figure 6C This is another planar structural diagram of a light-emitting device and a corresponding encapsulated lens provided according to some embodiments of the present disclosure;

[0039] Figure 6D This is another planar structural diagram of a light-emitting device and a corresponding encapsulated lens provided according to some embodiments of the present disclosure;

[0040] Figure 7 This is a planar structural diagram showing the offset distance between a light-emitting device and a corresponding encapsulated lens according to some embodiments of the present disclosure;

[0041] Figure 8 This is a planar structural diagram showing the region division of a light-emitting substrate provided according to some embodiments of the present disclosure;

[0042] Figure 9 This is a stacked structure diagram of a backlight module provided according to some embodiments of the present disclosure;

[0043] Figure 10 This is a structural diagram of a display device provided according to some embodiments of the present disclosure. Detailed Implementation

[0044] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0045] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0046] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0047] In describing some embodiments, the terms "coupled" and "connected," and their derivative expressions, may be used. The term "connected" should be interpreted broadly; for example, a "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection via an intermediate medium. The term "coupled," for example, indicates that two or more components have direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0048] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0049] "A and / or B, including the following three combinations: A only, B only, and a combination of A and B."

[0050] As used herein, depending on the context, the term "if" may optionally be interpreted as meaning "when," "at," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrases "if it is determined..." or "if [the stated condition or event] is optionally interpreted as meaning "in response to determination..." or "in response to detection of [the stated condition or event]."

[0051] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0052] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0053] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0054] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0055] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0056] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0057] In related technologies, in applications where Mini LED is used as a backlight, in some embodiments, such as Figure 1 As shown, Figure 1 The display device shown is a liquid crystal display device 2000, which includes a first substrate 1'. A plurality of light-emitting elements 2' are arranged in an array on the first substrate 1'. The light-emitting elements 2' are, for example, Mini LEDs. Each light-emitting element 2' has an encapsulation element 3' on the side away from the first substrate 1', covering the corresponding light-emitting element 2'. An optical film layer 4' is disposed on the side of the plurality of encapsulation elements 3' away from the first substrate 1'. The liquid crystal display device 2000 also includes a liquid crystal display panel 200', which is disposed on the side of the optical film layer 4' away from the first substrate 1'. The liquid crystal display device 2000 includes a display area AA', with the plurality of light-emitting elements 2' and the plurality of encapsulation elements 3' located in the display area. Exemplarily, the encapsulation element 3' is a lens. In some embodiments, such as... Figure 1 As shown, the center O1' of the encapsulation part 3' and the center O2' of the corresponding light-emitting part 2' are coincidentally projected onto the first substrate 1. The emitted light from the light-emitting part 2' exhibits a Lambertian distribution, meaning that the brightness at the center of the light-emitting part 2' is higher than that at the edge. It should be noted that, for ease of explanation of the structure of the liquid crystal display device 2000, Figure 1 The number of light-emitting parts 2' shown is for illustrative purposes only and does not represent the actual number of light-emitting parts 2' in the liquid crystal display device 2000.

[0058] Continue to refer to Figure 1The display area AA' includes a central area A1' and an edge area A2'. The central area A1' is the area between adjacent light-emitting parts, and the edge area is the area near the boundary of the display area. The light-emitting parts 2' near the edge area A2' are a certain distance H from the edge of the display area AA' of the liquid crystal display device 2000. That is to say, the edge area A2' of the display area AA' of the liquid crystal display device 2000 can only receive the light emitted by the light-emitting parts 2' on one side, while the central area A1' of the display area AA' can receive the light emitted by the light-emitting parts 2' on both sides at the same time. As a result, the display quality of the edge area A2' of the display area AA' is not clear and the brightness is lower than that of the central area A1' of the display area AA', resulting in a dark screen and other display problems, which affect the user experience.

[0059] Based on this, some embodiments of the present disclosure provide a light-emitting substrate, a backlight module, and a display device. By adjusting the position of the lens, the above-mentioned problem of uneven display image can be avoided, and the brightness of the display device can be improved at the same time, thereby improving the peripheral light effect of the display device.

[0060] For ease of description below, an XYZ coordinate system is established. The third direction Z is perpendicular to the plane where the light-emitting substrate is located, the XY plane is perpendicular to the Z direction, and the first direction X intersects the second direction Y. For example, the first direction X and the second direction Y are perpendicular to each other, the first direction X is the row direction X, and the second direction Y is the column direction Y.

[0061] It should be noted that, for example, B1 / B0 in the accompanying drawings of this disclosure indicates that region B1 belongs to region B0, and other similar reference numerals in the accompanying drawings also follow the above explanation.

[0062] The following provides a detailed description of the light-emitting substrate, backlight module, and display device provided in this disclosure.

[0063] like Figure 2 As shown, some embodiments of this disclosure provide a display device 1000.

[0064] Exemplarily, the aforementioned display device 1000 can be any device that displays images, whether moving (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, the embodiments described are contemplated to be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, television (TV) products, wireless devices, personal digital assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of a piece of jewelry), etc. Figure 1 The following is an illustration using the display device 1000 as an example of a mobile phone product.

[0065] For example, the display device 1000 may be a thin film transistor liquid crystal display (TFT-LCD) device.

[0066] In some embodiments, please continue reading Figure 3 The display device 1000 includes a backlight module 100 and a display panel 200. The backlight module 100 includes a light-emitting side aa and a backlight side bb. The light-emitting side aa refers to the side of the backlight module 100 that emits light, and the backlight side bb refers to the other side of the backlight module 100 opposite to the light-emitting side aa. The backlight module 100 can be used to provide a light source for the display panel 200, which is disposed on the light-emitting side aa of the backlight module 100. In some embodiments, the display device 1000 may further include a glass cover plate 300 disposed on the side of the display panel 200 away from the backlight module 100, the glass cover plate 300 serving to protect the display panel 200.

[0067] In some embodiments, such as Figure 4 As shown, the backlight module 100 includes a light-emitting substrate 10, wherein the light-emitting substrate 10 includes a substrate 1, a plurality of light-emitting devices 2, and a plurality of encapsulation lenses 3. The substrate 1 includes a light-emitting surface 1a and a backlight surface 1b. The plurality of light-emitting devices 2 are disposed on one side of the light-emitting surface 1a of the substrate 1, and are arranged in an array and spaced apart in the row direction X and column direction Y. Each of the plurality of encapsulation lenses 3 covers one light-emitting device 2.

[0068] The light-emitting substrate 10 includes a central region AA and an edge region BB surrounding the central region AA. In the edge region BB, the center O1 of the encapsulation lens 3 is closer to the central region AA than the center O2 of the corresponding light-emitting device 2.

[0069] For example, the light-emitting surface 1a of the substrate 1 corresponds to the light-emitting side aa of the backlight module 100. In other words, the light-emitting surface 1a of the substrate 1 and the light-emitting side aa of the backlight module 100 are located on the same side.

[0070] For example, the light-emitting device described above can be a MiniLED light-emitting device.

[0071] It should be noted that in the relevant technologies, the reference is... Figure 1 The center O1' of the encapsulation part 3' and the center O2' of the corresponding light-emitting part 2' are coincidentally disposed on the orthographic projection of the first substrate 1. Compared with related technologies, this application refers to Figure 4 In the edge region BB, the center O1 of the encapsulation lens 3 is closer to the center O2 of the corresponding light-emitting device 2 than the center O2 of the corresponding light-emitting device 2 in the central region AA. That is to say, the orthographic projection of the center O1 of the encapsulation lens 3 on the substrate 1 and the orthographic projection of the center O2 of the corresponding light-emitting device 2 on the substrate 1 do not coincide. The center O1 of the encapsulation lens 3 is offset from the center O2 of the corresponding light-emitting device 2. By offsetting the encapsulation lens 3, the position directly above the light-emitting device 2 is not the top position of the encapsulation lens 3, but the arc area of ​​the edge of the encapsulation lens 3.

[0072] Specifically, such as Figure 5A and Figure 5B As shown, Figure 5A This is a light-emitting optical path diagram showing the light-emitting device 2 and the corresponding encapsulated lens 3 facing each other according to some embodiments of this disclosure. Figure 5B This is a light path diagram showing the offset arrangement of the light-emitting device 2 and the corresponding encapsulating lens 3 according to some embodiments of this disclosure. When the light-emitting device 2 and the encapsulating lens 3 are directly opposite each other, the light emitted from the light-emitting device 2, after passing through the encapsulating lens 3, exhibits a Lambertian light pattern, meaning the brightness is highest at the center point of the encapsulating lens 3, gradually decreasing towards the edges. In this disclosure, the encapsulating lens 3 is offset. After the offset, the area directly above the light-emitting device 2 is not the top of the encapsulating lens 3, but rather the arcuate region of the edge of the encapsulating lens 3. This means the brightness at the center point of the encapsulating lens 3 can be weakened and compensated for in the arcuate region, ensuring the brightest point does not exceed the brightness of the center point in related technologies. Figure 4That is, the above-mentioned offset setting of the encapsulation lens 3 can change the light emission pattern of the light-emitting device 2 in the edge area BB and reduce the light emission ratio directly above.

[0073] It should also be noted that, such as Figure 5B As shown, and in combination Figure 4 The center O1 of the encapsulation lens 3 is closer to the center O2 of the corresponding light-emitting device 2 in the central area AA. That is, the encapsulation lens 3 is closer to the center area AA of the corresponding light-emitting device 2. This arrangement can increase the amount of light emitted by the light-emitting device 2 located in the edge area BB after refraction by the encapsulation lens 3, thereby increasing the light emission ratio of the display device 1000 in the edge area BB, and thus improving the brightness of the backlight of the display device 1000 in the edge area AA, and improving the peripheral light effect of the display device 1000.

[0074] In some embodiments, refer to Figure 6A In the edge region BB, the minimum distance h between the orthographic projection boundary of the encapsulated lens 3 on the substrate 1 and the orthographic projection boundary of the corresponding light-emitting device 2 on the substrate 1 is greater than or equal to 0.2 mm.

[0075] It should be noted that, as Figure 6A As shown, since the light-emitting device 2 is fabricated by welding onto the substrate 1 during the manufacturing process, the encapsulation lens 3 needs to completely enclose the light-emitting device 2 to prevent moisture intrusion and subsequent failure, thus ensuring its encapsulation performance. Through reliability verification, the inventors of this application discovered that the aforementioned minimum spacing can guarantee the encapsulation performance of the encapsulation lens 3 while preventing corrosion resistance failure at the welding points of the light-emitting device 2.

[0076] For example, refer to Figure 6B , Figure 6B This is a planar structural diagram of the light-emitting device 2 and the corresponding encapsulated lens 3, wherein, from Figure 6B It can be seen that the orthographic projection boundary of the encapsulating lens 3 on the substrate 1 is circular, while the orthographic projection boundary of the light-emitting device 2 on the substrate 1 is square. The minimum distance h between the orthographic projection boundary of the encapsulating lens 3 on the substrate 1 and the corresponding orthographic projection boundary of the light-emitting device 2 on the substrate 1 is the minimum distance from the vertex of the square closest to the circle to the circle, and the minimum distance h is greater than or equal to 0.2 mm. It can be understood that when the minimum distance h is equal to 0.2 mm, the corrosion resistance of the solder joint of the light-emitting device 2 can be prevented from failing. In other words, the minimum distance is at a critical value.

[0077] In some embodiments, refer to Figure 6A , Figure 6C and Figure 6D , combined Figure 4In the edge region BB, the distance between the center O1 of the encapsulation lens 3 and the center O2 of the corresponding light-emitting device 2 is the offset distance S. The distance between the two intersection points of the straight line G passing through the center O1 of the encapsulation lens 3 and the center O2 of the corresponding light-emitting device 2 and the boundary of the encapsulation lens 3 is the first distance W. The distance between the two intersection points of the straight line passing through the center O1 of the encapsulation lens 3 and the center O2 of the corresponding light-emitting device 2 and the boundary of the light-emitting device 2 is the second distance D. The offset distance S satisfies: S≤(W / 2)-(D / 2)-0.2.

[0078] For example, refer to Figure 6C , Figure 6C The straight line G passing through the center O1 of the encapsulation lens 3 and the center O2 of the corresponding light-emitting device 2 is parallel to the row direction X. That is to say, the encapsulation lens 3 is offset relative to the light-emitting device 2 in the row direction X. At this time, the first distance W is the diameter of the encapsulation lens 3, and the second distance D is the side length of the light-emitting device 2.

[0079] For example, refer to Figure 6D , Figure 6D The straight line G passing through the center O1 of the encapsulation lens 3 and the center O2 of the corresponding light-emitting device 2 intersects both the row direction X and the column direction. In other words, the encapsulation lens 3 is offset relative to the light-emitting device 2 in both the row direction X and the column direction Y. At this time, the first distance W is the diameter of the encapsulation lens 3, and the second distance D is the diagonal of the light-emitting device 2.

[0080] It should be noted that, as described above, under the premise of ensuring the corrosion resistance of the welding point of the light-emitting device 2, the offset distance S satisfies S≤(W / 2)-(D / 2)-0.2, where 0.2 is the critical value of the minimum spacing when ensuring the corrosion resistance of the welding point of the light-emitting device 2.

[0081] In some embodiments, continue to refer to Figure 6C and Figure 6D The offset distance S ranges from 0.4mm to 0.6mm.

[0082] For example, the offset distance S can be 0.4mm, 0.5mm or 0.6mm, and there is no specific limitation here, as long as it meets the above range.

[0083] In some embodiments, refer to Figure 6A The height L of the encapsulated lens 3 ranges from 0.5mm to 1mm; the diameter of the encapsulated lens 3 ranges from 2mm to 4mm.

[0084] For example, the height L of the encapsulated lens 3 can be 0.5mm, 0.7mm or 1mm, and the diameter of the encapsulated lens 3 can be 2mm, 3mm or 4mm. There is no specific limitation here, as long as it meets the above range; wherein, the diameter of the encapsulated lens 3 is equal to the first distance W mentioned above.

[0085] It should be noted that the main purpose of setting the height L and diameter of the encapsulation lens 3 is, on the one hand, to ensure that the encapsulation lens 3 can completely enclose the light-emitting device 2, thereby further improving the encapsulation performance; on the other hand, when the height L and diameter of the encapsulation lens 3 are within a certain range, the curvature of the encapsulation lens 3 is also fixed within a certain range, thereby ensuring that the light pattern emitted by the light-emitting device 2 through the encapsulation lens is the preset light pattern.

[0086] In some embodiments, such as Figure 7 As shown, the edge region BB includes multiple sub-edge regions B0. The multiple sub-edge regions B0 are arranged sequentially around the central region AA along the direction from the center of the light-emitting substrate 10 to the edge. The offset distance S of the sub-edge region B0 closer to the central region AA is smaller than the offset distance S of the sub-edge region B0 farther from the central region AA.

[0087] It should be noted that in the edge region BB, the light-emitting device 2 closer to the center region AA has a higher light-emitting efficiency than the light-emitting device 2 farther from the center region AA. That is, the light brightness of the light-emitting device 2 closer to the center region AA is brighter than that of the light-emitting device 2 farther from the center region AA. Therefore, in order to ensure the uniformity of the light-emitting substrate 10, the offset distance S corresponding to the sub-edge region B0 closer to the center region AA is set to be smaller than the offset distance S corresponding to the sub-edge region B0 farther from the center region AA. In other words, the offset distance S of the encapsulation lens 3 in the sub-edge region B0 farther from the center region AA relative to the corresponding light-emitting device 2 towards the center region AA is greater than the offset distance S of the encapsulation lens 3 in the sub-edge region B0 closer to the center region AA relative to the corresponding light-emitting device 2 towards the center region AA. With this setting, the light emitted by the light-emitting device 2 in the sub-edge region B0, which is relatively farther from the center region AA, can be further emitted towards the side farther from the center region AA after passing through the arc area of ​​the encapsulation lens 3, which is equivalent to further improving the light efficiency of the display device in the sub-edge region B0, which is relatively farther from the center region AA.

[0088] In some embodiments, such as Figure 7 As shown, along the direction from the center of the light-emitting substrate 10 to the edge, the offset distances corresponding to the multiple sub-edge regions B0 increase exponentially.

[0089] It is understandable that, referring to the aforementioned light emission principle, the further away the sub-edge region B0 is from the center region AA, the lower the light emission efficiency. That is, the offset distance S required for the encapsulation lens 3 needs to be larger. For example, along the direction from the center of the light-emitting substrate 10 to the edge, the offset distance S corresponding to multiple sub-edge regions B0 increases exponentially. For instance, the offset distance corresponding to the sub-edge region B0 on ​​the side farther from the center region AA among two adjacent sub-edge regions B0 is twice the offset distance corresponding to the sub-edge region B0 on ​​the side closer to the center region AA. This setting can further improve the uniformity of light emission of the light-emitting substrate 10, and at the same time improve the edge light efficiency of the light-emitting substrate 10.

[0090] In some embodiments, continue to refer to Figure 8 The edge region BB includes two sub-edge regions B0. The two sub-edge regions B0 include a first sub-edge region B1 and a second sub-edge region B2 that are connected to each other. The second sub-edge region B2 surrounds the center region AA, and the first sub-edge region B1 surrounds the second sub-edge region B2. The offset distance S corresponding to the first sub-edge region B1 is greater than the offset distance S corresponding to the second sub-edge region B2.

[0091] For example, refer to Figure 8 , combined Figure 7 , Figure 7 The second sub-edge region B2 is closer to the center region AA than the first sub-edge region B1. Therefore, the light emission efficiency of the second sub-edge region B2 is higher than that of the first sub-edge region B1. In order to ensure the uniformity of light emission of the light-emitting substrate 10, the offset distance S corresponding to the first sub-edge region B1 is set to be greater than the offset distance S corresponding to the second sub-edge region B2, so as to ensure the brightness uniformity of the light-emitting substrate 10 in the first sub-edge region B1 and the second sub-edge region B2 and improve the picture quality.

[0092] In some embodiments, refer to Figure 8 The width L1 of the first sub-edge region B1 is less than or equal to the width L2 of the second sub-edge region B2. The width L1 of the first sub-edge region B1 is the distance between the outer contour boundary and the inner contour boundary of the first sub-edge region B1. The width L2 of the second sub-edge region B2 is the distance between the outer contour boundary and the inner contour boundary of the second sub-edge region B2. The outer contour boundary of the second sub-edge region B2 coincides with the inner contour boundary of the first sub-edge region B1.

[0093] The ratio of the width L1 of the first sub-edge region B1 in the row direction X to the dimension L of the light-emitting substrate 10 in the row direction X ranges from 1:100 to 3:100, and the ratio of the width P1 of the first sub-edge region B1 in the column direction Y to the dimension P of the light-emitting substrate 10 in the column direction Y ranges from 1:100 to 3:100; the ratio of the width L2 of the second sub-edge region B2 in the row direction X to the dimension L of the light-emitting substrate 10 in the row direction X ranges from 3:100 to 1:10, and the ratio of the width L2 of the second sub-edge region B2 in the column direction Y to the dimension P of the light-emitting substrate 10 in the column direction Y ranges from 3:100 to 1:10.

[0094] For example, refer to Figure 8 When the ratio of the width L1 of the first sub-edge region B1 in the column direction Y to the size of the light-emitting substrate 10 in the column direction Y is 3:100, and the ratio of the width L2 of the second sub-edge region B2 in the row direction X to the size of the light-emitting substrate 10 in the row direction X is also 3:100, then the width L1 of the first sub-edge region B1 is equal to the width L2 of the second sub-edge region B2. When the ratio of the width L1 of the first sub-edge region B1 in the column direction Y to the size of the light-emitting substrate 10 in the column direction Y is 1:100, and the ratio of the width L2 of the second sub-edge region B2 in the row direction X to the size of the light-emitting substrate 10 in the row direction X is also 1:10, then the width L1 of the first sub-edge region B1 is smaller than the width L2 of the second sub-edge region B2.

[0095] It should be noted that multiple light-emitting devices 2 and corresponding encapsulation lenses 3 are disposed in both the first sub-edge region B1 and the second sub-edge region B2, and the encapsulation lenses 3 in the first sub-edge region B1 or the second sub-edge region B2 do not overlap with the boundaries of their respective regions. Since the second sub-edge region B2 is closer to the center region AA than the first sub-edge region B1, meaning that at least a portion of the first sub-edge region B1 has light-emitting devices 2 emitting light on one side, while the second sub-edge region B2 has light-emitting devices 2 emitting light on both sides, the luminous efficacy of the first sub-edge region B1 is less than that of the second sub-edge region B2. Therefore, according to the light emission principle of the encapsulation lenses 3, the offset distance S corresponding to the second sub-edge region B2 needs to be set smaller than the offset distance S corresponding to the first sub-edge region B1 to ensure the brightness uniformity of the light-emitting substrate 10 in the first and second sub-edge regions B1 and improve image quality.

[0096] In some embodiments, refer to Figure 8 The first sub-edge region B1 includes at least one first corner region B11, at least one first extension region B12 and at least one second extension region B13. The first corner region B11 connects the adjacent first extension region B12 and second extension region B13, and the first corner region B11 is located at the corner of the first sub-edge region B1.

[0097] The second sub-edge region B2 includes at least one second corner region B21, at least one third extension region B22 and at least one fourth extension region B23. The second corner region B21 connects the adjacent third extension region B22 and fourth extension region B23, and the second corner region B21 is located at the corner of the second sub-edge region B2.

[0098] Among them, the first extension area B12 and the third extension area B22 extend along the column direction Y, and the second extension area B13 and the fourth extension area B23 extend along the row direction X.

[0099] For example, refer to Figure 8 , Figure 8 The first sub-edge region B1 and the second sub-edge region B2 shown are both box-shaped regions; this is merely an example and not a specific limitation. Figure 8 As shown, the first sub-edge region B1 includes four first corner regions B11, two first extension regions B12, and two second extension regions B13. The first corner regions B11 are located at the four corners of the first sub-edge region B1. The two first extension regions B12 are positioned opposite each other in the row direction X, and the two second extension regions B13 are positioned opposite each other in the column direction Y. The second sub-edge region B2 includes four second corner regions B21, two third extension regions B22, and two fourth extension regions B23. The second corner regions B21 are located at the four corners of the second sub-edge region B2. The two third extension regions B22 are positioned opposite each other in the row direction X, and the two fourth extension regions B23 are positioned opposite each other in the column direction Y.

[0100] In some embodiments, continue to refer to Figure 8 and Figure 7 In the first extension region B12, the center O1 of the encapsulation lens 3 is offset by a first offset distance S1 relative to the center O2 of the corresponding light-emitting device 2 along the row direction X toward the center region AA; in the second extension region B13, along the column direction Y, the offset distance S between the center O1 of the encapsulation lens 3 and the center O2 of the light-emitting device 2 is a second offset distance S2; wherein, the first offset distance S1 and the second offset distance S2 are equal.

[0101] For example, such as Figure 8 As shown, combined with Figure 7 The two first extension regions B12 are located on either side of the central region AA along the X direction. The center O1 of the encapsulation lens 3 in the two first extension regions B12 is offset relative to the center O2 of the corresponding light-emitting device 2 towards the central region AA. That is, the center O1 of the corresponding encapsulation lens 3 in the two opposite first extension regions B12 is close to each other. This arrangement can increase the light output of the side of the two first extension regions B12 away from the central region AA along the X direction, thereby improving the luminous efficiency of the light-emitting substrate 10. Continuing to refer to... Figure 8 The two second extension regions B13 are located on both sides of the central region AA along the column direction Y. The center O1 of the encapsulation lens 3 in the two second extension regions B13 is offset towards the central region AA relative to the center O2 of the corresponding light-emitting device 2. This arrangement can increase the amount of light emitted from the side of the two second extension regions B13 away from the central region AA along the column direction Y, thereby improving the light efficiency of the light-emitting substrate 10 and improving the uniformity of the display screen of the display device.

[0102] It should be noted that, since the first sub-edge region B1 is a frame-shaped area and the light-emitting devices 2 are arranged in an array in the first sub-edge region B1, for example, in the first sub-edge region B1, the light-emitting device 2 on the side furthest from the center region AA has a certain gap with the boundary of the first sub-edge region B1 on the side furthest from the center region AA. That is to say, the gap between the light-emitting device 2 on the side furthest from the center region AA in the first extension region B12 and the boundary of the first extension region B12 on the side furthest from the center region AA, and the gap between the light-emitting device 2 on the side furthest from the center region AA in the second extension region B13 and the boundary of the second extension region B13 on the side furthest from the center region AA can be equal. Based on this, setting the first offset distance S1 and the second offset distance S2 to be equal can better achieve the uniformity of light emission of the light-emitting substrate 10 in the first sub-edge region B1, which is beneficial to improving the picture quality of the display device.

[0103] In some embodiments, refer to Figure 7 and Figure 8 In the first corner area B11, the center O1 of the encapsulated lens 3 is offset by a first offset distance S1 relative to the center O2 of the corresponding light-emitting device 2 along the row direction X toward the center area AA, and offset by a second offset distance S2 along the column direction Y toward the center area AA.

[0104] For example, since the first corner area B11 is located at the corner of the first sub-edge area B1, and is connected to the adjacent first extension area B12 and second extension area B13, in order to ensure the uniformity of light between the first corner area B11 and the first extension area B12 and the second extension area B13, the center O1 of the encapsulation lens 3 is offset by a first offset distance S1 relative to the center O2 of its corresponding light-emitting device 2 along the row direction X toward the center area AA, and offset by a second offset distance S2 along the column direction Y toward the center area AA. Since the first offset distance S1 and the second offset distance S2 are equal, that is, the offset distance of the center O1 of the encapsulation lens 3 of the first corner area B11 along the row direction X and the column direction Y is the same, the light efficiency of the position of the first corner area B11 away from the center area AA can be improved, further improving the uniformity of the display of the screen of the display device.

[0105] In some embodiments, continue to refer to Figure 7 and Figure 8In the third extension region B22, the center O1 of the encapsulation lens 3 is offset by a third offset distance S3 relative to the center O2 of its corresponding light-emitting device 2 along the row direction X toward the central region AA; in the fourth extension region B23, the center O1 of the encapsulation lens 3 is offset by a fourth offset distance S4 relative to the center O2 of its corresponding light-emitting device 2 along the column direction Y toward the central region AA; wherein, the third offset distance S3 and the fourth offset distance S4 are equal, and both the third offset distance S3 and the fourth offset distance S4 are half of the third offset distance S3 or the fourth offset distance S4.

[0106] It should be noted that, as described above, along the direction from the center of the light-emitting substrate 10 to the edge, the offset distances corresponding to the multiple sub-edge regions B0 increase exponentially. Specifically, the third extension region B22 is closer to the center region AA than the first extension region B12, and the fourth extension region B23 is closer to the center region AA than the second extension region B13. Therefore, the third offset distance S3 and the fourth offset distance S4 are both set to be half of either the third offset distance S3 or the fourth offset distance S4. For ease of explanation, this multiple relationship is only an example; other multiple relationships are also possible. Furthermore, the specific effect of the offset of the center O1 of the encapsulation lens 3 relative to the center O2 of its corresponding light-emitting device 2 in the third extension region B22 and the fourth extension region B23 is as described above and will not be repeated here.

[0107] In some embodiments, continue to refer to Figure 7 and Figure 8 In the second corner area B21, the center O1 of the encapsulated lens 3 is offset by a third offset distance S3 relative to the center O2 of its corresponding light-emitting device 2 along the row direction X toward the center area AA, and by a fourth offset distance S4 along the column direction Y toward the center area AA.

[0108] It is understandable that the second corner area B21 is closer to the center area AA than the first corner area B11, and the second corner area B21 is located in the second sub-edge area B2. Therefore, in order to ensure the uniformity of light between the second corner area B21 and the third extension area B22 and the fourth extension area B23, the center O1 of the encapsulation lens 3 is offset by a third offset distance S3 relative to the center O2 of its corresponding light-emitting device 2 along the row direction X toward the center area AA, and by a fourth offset distance S4 along the column direction Y toward the center area AA. Since the third offset distance S1 and the fourth offset distance S2 are equal, that is, the offset distance of the center O1 of the encapsulation lens 3 of the second corner area B21 along the row direction X and the column direction Y is the same, the light efficiency of the position of the second corner area B21 away from the center area AA can be improved, further improving the uniformity of the display of the screen of the display device.

[0109] like Figure 7 and Figure 8As shown, in some embodiments, multiple light-emitting devices 2 are arrayed and spaced apart in the row direction X and column direction Y. Figure 7 The dashed circles surrounding each light-emitting device 2 represent the initial position of the encapsulating lens 3. In its initial position, the center of the encapsulating lens 3 coincides with the center of the light-emitting device 2, and the encapsulating lens 3 and the light-emitting device 2 face each other directly. The positioning of the encapsulating lens 3 and the light-emitting device 2 can be understood as keeping the positions of the multiple light-emitting devices 2 on the light-emitting substrate 10 unchanged, while shifting the position of the encapsulating lens 3 in the edge region BB towards the center region AA compared to its initial position. For example, in the first extension region B12, the encapsulating lens 3 shifts towards the center region AA along the row direction X; in the second extension region B13, the encapsulating lens 3 shifts towards the center region AA along the column direction Y; and in the first corner region B11, the encapsulating lens 3 shifts towards the center region AA along a diagonal line direction, which intersects both the row direction X and the column direction Y.

[0110] Reference Figure 8 , Figure 8 The arrows shown represent the offset direction of the encapsulation lens 3 relative to the light-emitting device 2 in each region. For example, in the first extension region B12, the offset direction of the encapsulation lens 3 relative to the light-emitting device 2 points from the first extension region B12 to the center region AA; in the second extension region B13, the offset direction of the encapsulation lens 3 relative to the light-emitting device 2 points from the second extension region B13 to the center region AA; and in the first corner region B11, the offset direction of the encapsulation lens 3 relative to the light-emitting device 2 points from the first corner region B11 to the center region AA.

[0111] On the other hand, some embodiments of this disclosure also provide a backlight module 100, such as Figure 9 As shown, combined with Figure 4 The backlight module 100 includes: a light-emitting substrate 10 as provided in any of the above embodiments, and a film assembly 4 disposed on the side of the plurality of encapsulation lenses 3 away from the substrate 1.

[0112] In some embodiments, the film assembly 4 of the backlight module 100 includes: a diffuser plate 41, a light-diffusing film 42, a quantum dot film 43, and a composite prism 44. The diffuser plate 41 is disposed on the side of the plurality of encapsulated lenses 3 away from the substrate 1. The light-diffusing film 42 is disposed on the side of the diffuser plate 41 away from the light-emitting substrate 10. The quantum dot film 43 is disposed on the side of the light-diffusing film 42 away from the light-emitting substrate 10. The composite prism 44 is disposed on the side of the quantum dot film 43 away from the light-emitting substrate 10.

[0113] For example, the light-emitting substrate 10 can emit blue light, and the quantum dot film 43 can include red quantum dot material, green quantum dot material, and transparent material. When the blue light emitted by the light-emitting substrate 10 passes through the red quantum dot material, it is converted into red light; when it passes through the green quantum dot material, it is converted into green light; when it passes through the transparent material, no color conversion occurs. Then, the blue light, red light, and green light are mixed and superimposed in a certain proportion to produce white light.

[0114] For example, the diffuser plate 41 has scattering and diffusion effects, which can further homogenize the white light. The diffuser plate 41 can be used to provide mechanical support for the homogenizing film 42, the quantum dot film 43 and the composite prism 44, while diffusing the point light source of the light-emitting device 2 into a surface light source.

[0115] For example, the light-diffusing film 42 can ensure uniform light output.

[0116] For example, the composite prism 44 can improve the light extraction efficiency of the backlight module 100.

[0117] In some embodiments, refer to Figure 9 The backlight module 100 also includes a frame 5, which surrounds the film assembly 4. The edge of the backlight module 100 is provided with a sidewall extending along the light emission direction, and the frame 5 is provided around the outer periphery of the sidewall. Supports are provided around the frame 5.

[0118] In some embodiments, refer to Figure 9 The backlight module 100 also includes a back plate 6, which is disposed on the side of the substrate 1 away from the encapsulation lens 3. The material of the back plate 6 can be a metal material. The back plate 6 serves as a mechanical support in the backlight module 100 to support other components in the backlight module 100.

[0119] For example, such as Figure 9 As shown, the edge of the back panel 6 is connected to the frame 5.

[0120] Furthermore, some embodiments of this disclosure also provide a display device 1000, such as... Figure 10 As shown, the display device 1000 includes a backlight module 100 as described in any of the other aspects of the above embodiments and a display panel 200, wherein the display panel 200 is stacked on the light-emitting side aa of the backlight module 100.

[0121] Exemplary, the display device 1000 includes the backlight module 100 provided in the above embodiments, and has all the beneficial effects of the backlight module 100, which will not be repeated here. The display device 1000 can be a mobile phone, wireless device, personal digital assistant (PDA), handheld or portable computer, GPS receiver / navigator, camera, MP4 video player, camcorder, game console, watch, clock, calculator, TV monitor, flat panel display, computer monitor, car display (e.g., odometer display, etc.), navigator, cockpit controller and / or display, camera view display (e.g., display of a rearview camera in a vehicle), electronic photograph, electronic billboard or sign, projector, packaging and aesthetic structure (e.g., display of an image of a piece of jewelry), etc. The embodiments of this disclosure do not impose special limitations on the specific form of the above display device.

[0122] In one possible embodiment, the display panel is a liquid crystal display panel, and the display device including the display panel is a liquid crystal display device. Exemplarily, the liquid crystal display panel may be an Advanced Super Dimension Switch (ADS) liquid crystal display panel, or a high aperture ratio High-Advanced Dimension Switch (HADS) liquid crystal display panel.

[0123] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0124] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A light-emitting substrate, characterized in that, include: A substrate, the substrate comprising a light-emitting surface and a back-light surface; Multiple light-emitting devices are disposed on one side of the light-emitting surface of the substrate, and the multiple light-emitting devices are arranged in an array and spaced apart in the row and column directions; Multiple encapsulated lenses, each of the multiple encapsulated lenses corresponding to one of the light-emitting devices; The light-emitting substrate includes a central region and an edge region surrounding the central region. In the edge region, the center of the encapsulation lens is closer to the center of the corresponding light-emitting device than the center of the central region.

2. The light-emitting substrate according to claim 1, characterized in that, In the edge region, the minimum distance between the orthographic projection boundary of the encapsulation lens on the substrate and the orthographic projection boundary of the corresponding light-emitting device on the substrate is greater than or equal to 0.2 mm.

3. The light-emitting substrate according to claim 2, characterized in that, In the edge region, the distance between the center of the encapsulation lens and the center of the corresponding light-emitting device is the offset distance S; the distance between the two intersection points of the straight line passing through the center of the encapsulation lens and the center of the corresponding light-emitting device and the boundary of the encapsulation lens is the first distance W; the distance between the two intersection points of the straight line passing through the center of the encapsulation lens and the center of the corresponding light-emitting device and the boundary of the light-emitting device is the second distance D. The offset distance S satisfies: S≤(W / 2)-(D / 2)-0.

2.

4. The light-emitting substrate according to claim 3, characterized in that, The offset distance ranges from 0.4mm to 0.6mm.

5. The light-emitting substrate according to claim 3, characterized in that, The height range of the encapsulated lens is 0.5mm to 1mm; The diameter of the encapsulated lens ranges from 2mm to 4mm.

6. The light-emitting substrate according to any one of claims 3 to 5, characterized in that, The edge region includes multiple sub-edge regions, which are arranged sequentially around the central region along the direction from the center of the light-emitting substrate to the edge. The offset distance of the sub-edge region closer to the central region is smaller than the offset distance of the sub-edge region farther from the central region.

7. The light-emitting substrate according to claim 6, characterized in that, Along the direction from the center of the light-emitting substrate to the edge, the offset distances corresponding to the plurality of sub-edge regions increase exponentially.

8. The light-emitting substrate according to claim 6, characterized in that, The edge region includes two sub-edge regions, which are first and second sub-edge regions that are connected to each other. The second sub-edge region surrounds the center region, and the first sub-edge region surrounds the second sub-edge region. The offset distance corresponding to the first sub-edge region is greater than the offset distance corresponding to the second sub-edge region.

9. The light-emitting substrate according to claim 8, characterized in that, The width of the first sub-edge region is less than or equal to the width of the second sub-edge region. The width of the first sub-edge region is the distance between the outer contour boundary and the inner contour boundary of the first sub-edge region. The width of the second sub-edge region is the distance between the outer contour boundary and the inner contour boundary of the second sub-edge region. The outer contour boundary of the second sub-edge region coincides with the inner contour boundary of the first sub-edge region.

10. The light-emitting substrate according to claim 9, characterized in that, The ratio of the width of the first sub-edge region in the row direction to the size of the light-emitting substrate in the row direction ranges from 1:100 to 3:100, and the ratio of the width of the first sub-edge region in the column direction to the size of the light-emitting substrate in the column direction ranges from 1:100 to 3:100; the ratio of the width of the second sub-edge region in the row direction to the size of the light-emitting substrate in the row direction ranges from 3:100 to 1:10, and the ratio of the width of the second sub-edge region in the column direction to the size of the light-emitting substrate in the column direction ranges from 3:100 to 1:

10.

11. The light-emitting substrate according to any one of claims 8 to 10, characterized in that, The first sub-edge region includes at least one first corner region, at least one first extension region, and at least one second extension region. The first corner region connects the adjacent first extension region and the second extension region, and the first corner region is located at the corner of the first sub-edge region. The second sub-edge region includes at least one second corner region, at least one third extension region, and at least one fourth extension region. The second corner region connects the adjacent third extension region and fourth extension region, and the second corner region is located at the corner of the second sub-edge region. The first and third extension areas extend along the column direction, the second and fourth extension areas extend along the row direction, and the first corner area and the second corner area are in contact with each other at their closest vertices.

12. The light-emitting substrate according to claim 11, characterized in that, In the first extension region, the center of the encapsulation lens is offset relative to the center of the corresponding light-emitting device by a first offset distance along the row direction toward the central region; In the second extension region, along the column direction, the offset distance between the center of the encapsulation lens and the center of the light-emitting device is the second offset distance; Wherein, the first offset distance is equal to the second offset distance.

13. The light-emitting substrate according to claim 12, characterized in that, In the first corner region, the center of the encapsulated lens is offset relative to the center of the corresponding light-emitting device by a first offset distance along the row direction toward the center region, and by a second offset distance along the column direction toward the center region.

14. The light-emitting substrate according to claim 11, characterized in that, In the third extension region, the center of the encapsulation lens is offset relative to the center of the corresponding light-emitting device by a third offset distance along the row direction toward the central region; In the fourth extension region, the center of the encapsulation lens is offset relative to the center of the corresponding light-emitting device by a fourth offset distance along the column direction toward the central region; The third offset distance is equal to the fourth offset distance, and both the third offset distance and the fourth offset distance are half of the first offset distance or the second offset distance.

15. The light-emitting substrate according to claim 14, characterized in that, In the second corner region, the center of the encapsulated lens is offset by a third offset distance relative to the center of the corresponding light-emitting device along the row direction toward the center region, and by a fourth offset distance along the column direction toward the center region.

16. A backlight module, characterized in that, include: The light-emitting substrate as described in any one of claims 1 to 15; A film assembly disposed on the side of the plurality of encapsulation lenses away from the substrate.

17. The backlight module according to claim 16, characterized in that, The membrane material assembly includes: A diffuser plate is disposed on the side of the plurality of encapsulated lenses away from the substrate; A light-diffusing film is disposed on the side of the diffuser plate away from the light-emitting substrate; A quantum dot film is disposed on the side of the light-diffusing film away from the light-emitting substrate; A composite prism is disposed on the side of the quantum dot film away from the light-emitting substrate.

18. The backlight module according to claim 16, characterized in that, The backlight module also includes a frame that surrounds the film assembly. The edge of the backlight module is provided with a sidewall that extends along the light emission direction, and the frame is provided around the outer periphery of the sidewall.

19. A display device, characterized in that, include: The backlight module as described in any one of claims 16 to 18, wherein the backlight module includes a light-emitting side and a backlight side; The display panel is stacked on the light-emitting side of the backlight module.

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