Backlight structure, display module and display device

Abstract

The invention relates to a backlight structure, a display module and a display device. The backlight structure comprises a substrate, a diffusion plate and a plurality of light-emitting devices, and the light-emitting devices are arranged on one side of the substrate; the diffusion plate is arranged on one side, deviating from the substrate, of the plurality of light-emitting devices; the diffusion plate comprises a plate body and a plurality of first ink pieces located on the side, facing the light-emitting devices, of the plate body, and the first ink pieces correspond to the light-emitting devices. Wherein the plate body comprises a middle area and an edge area arranged around the middle area, first printing ink pieces are arranged in the middle area and the edge area, and the area of the orthographic projection, on the plate body, of the first printing ink pieces located in the edge area is smaller than that of the orthographic projection, on the plate body, of the first printing ink pieces located in the middle area. According to the backlight structure, the orthographic projection area of the first ink piece located in the edge area is smaller than the orthographic projection area of the first ink piece located in the middle area, the light emitting rate of the edge area can be improved, and therefore the light emitting uniformity of the backlight structure is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a backlight structure, display module and display device. Background Technology

[0002] Mini LED, also known as sub-millimeter light-emitting diode, features high resolution, high brightness, energy saving, and fast response speed, and is considered a next-generation display technology. Currently, the main application of Mini LED in the display field is in Mini LED backlighting. Because Mini LED chips are smaller in size and spacing than conventional LED chips, direct control of the brightness of the backlight Mini LED chips allows for local dimming within a small area, thereby achieving higher brightness uniformity and color contrast within a smaller mixing distance.

[0003] In related technologies, Mini LED backlight structures typically include stacked substrates, Mini LED chips, and diffuser plates. Large-size backlight structures are usually composed of multiple diffuser plates spliced ​​together. Due to different light refraction at the splicing seams of the diffuser plates, the light intensity is low at the seams, forming dark bands that affect the final display effect. Summary of the Invention

[0004] Based on this, in order to address the aforementioned technical problems, it is necessary to provide a backlight structure, a display module, and a display device that can improve the light emission uniformity of the backlight structure.

[0005] An embodiment of this application provides a backlight structure, including a substrate, a diffuser plate, and multiple light-emitting devices. The multiple light-emitting devices are disposed on one side of the substrate. The diffuser plate is disposed on the side of the multiple light-emitting devices away from the substrate. The diffuser plate includes a plate body and multiple first ink elements located on the side of the plate body facing the light-emitting devices. The multiple first ink elements are disposed corresponding to the multiple light-emitting devices. The plate body includes a central region and an edge region surrounding the central region. The first ink elements are disposed in both the central region and the edge region. The area of ​​the orthographic projection of the first ink element located in the edge region on the plate body is smaller than the area of ​​the orthographic projection of the first ink element located in the central region on the plate body.

[0006] In one embodiment, the plate is rectangular in shape and includes two first sides extending along a first direction and two second sides extending along a second direction. The first direction, the second direction, and the thickness direction of the plate intersect each other. A plurality of first ink elements are arranged in rows and columns along the first direction and the second direction. The width of the first ink elements located in the edge area in the first direction is smaller than the width of the first ink elements located in the middle area in the first direction, and / or, the width of the first ink elements located in the edge area in the second direction is smaller than the width of the first ink elements located in the middle area in the second direction.

[0007] In one embodiment, the edge region includes: a first region located on both sides of the middle region in a first direction, wherein the width of the first ink element in the first region in the first direction is smaller than the width of the first ink element in the middle region in the first direction; a second region located on both sides of the middle region in a second direction, wherein the width of the first ink element in the second region in the second direction is smaller than the width of the first ink element in the middle region in the second direction; and a corner region located on both sides of the first region in the first direction, wherein the width of the first ink element in the corner region in the first direction is smaller than the width of the first ink element in the middle region in the first direction, and the width of the first ink element in the corner region in the second direction is smaller than the width of the first ink element in the middle region in the second direction.

[0008] In one embodiment, the first ink element includes a first sub-ink element located in a first region, a second sub-ink element located in a second region, a third sub-ink element located in a corner region, and a fourth sub-ink element located in a middle region; the ratio of the width of the first sub-ink element in the first direction to the width of the fourth sub-ink element in the first direction is in the range of 1 / 3 to 3 / 4; the ratio of the width of the second sub-ink element in the second direction to the width of the fourth sub-ink element in the second direction is in the range of 1 / 3 to 3 / 4; the ratio of the width of the third sub-ink element in the first direction to the width of the fourth sub-ink element in the first direction is in the range of 1 / 3 to 3 / 4, and the ratio of the width of the third sub-ink element in the second direction to the width of the fourth sub-ink element in the second direction is in the range of 1 / 3 to 3 / 4.

[0009] In one embodiment, the center of the orthographic projection of the first ink element located in the edge region on the plate is located on the side facing the center of the orthographic projection of the light-emitting device located opposite it on the plate.

[0010] In one embodiment, the spacing between any two adjacent first ink elements in the middle area is equal; the minimum spacing between the first ink element in the edge area and the edge of the board is defined as a first distance, and the minimum spacing between the first ink element in the edge area and the first ink element in the middle area is defined as a second distance, wherein the first distance is greater than the second distance.

[0011] In one embodiment, the center of the first ink element located in the edge region is aligned with the center of the light-emitting device positioned opposite it.

[0012] In one embodiment, there are multiple diffuser plates arranged in a direction parallel to the diffuser plates. Adjacent diffuser plates are connected and a seam is formed between adjacent diffuser plates. The spacing between any two adjacent light-emitting devices is equal. The orthographic projection of the seam on the substrate is located between the orthographic projections of the two adjacent light-emitting devices on the substrate, and the orthographic projection of the seam on the substrate is equal to the spacing between the light-emitting devices located on both sides.

[0013] An embodiment of the second aspect of this application provides a display module, including a display screen and a backlight structure as provided in any of the first aspect embodiments above.

[0014] An embodiment of the third aspect of this application provides a display device, including the display module provided in the second aspect embodiment above.

[0015] The backlight structure provided in this application divides the plate into a central area and an edge area surrounding the central area. The projected area of ​​the first ink element located in the edge area is smaller than that of the first ink element located in the central area. This results in a smaller blocking effect of the first ink element located in the edge area compared to the first ink element located in the central area. More light from the light-emitting devices aligned with the edge area can enter the plate without passing through the first ink element, which helps to improve the light output efficiency of the edge area and alleviate the dark area phenomenon at the seam between two adjacent diffuser plates. This makes the display brightness at the seam between two adjacent diffuser plates more consistent with the display brightness of the rest of the area, thereby improving the light output uniformity of the backlight structure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a side view schematic diagram of the backlight structure of some embodiments of this application.

[0018] Figure 2 An example is shown. Figure 1 A magnified view of the backlight structure at position A.

[0019] Figure 3 A schematic diagram of the structure of an example diffuser plate is shown from below.

[0020] Figure 4 A side view schematic diagram of another example of a backlight structure is shown.

[0021] Figure 5 An example is shown. Figure 4 A magnified schematic diagram of the backlight structure at position B.

[0022] Figure 6 A bottom view of another example of a diffuser plate is shown.

[0023] Figure label:

[0024] 10. Backlight structure;

[0025] 100. Substrate;

[0026] 200. Diffuser plate; 201. Seam; 210. Plate body; 211. Middle area; 212. Edge area; 213. First side; 214. Second side; 215. First area; 216. Second area; 217. Corner area; 220. First ink component; 221. First sub-ink component; 222. Second sub-ink component; 223. Third sub-ink component; 224. Fourth sub-ink component; 230. Second ink component;

[0027] 300. Light-emitting devices;

[0028] 400, encapsulating adhesive;

[0029] x, first direction; y, second direction; z, thickness direction. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] In related technologies, Mini LED backlight structures typically include stacked substrates, Mini LED chips, and diffuser plates. Large-size backlight structures are usually composed of multiple diffuser plates spliced ​​together. Due to different light refraction at the splicing seams of the diffuser plates, the light intensity is low at the seams, forming dark bands that affect the final display effect.

[0037] To address the aforementioned issues, embodiments of this application provide a backlight structure, a display module, and a display device, which can improve the light emission uniformity of the backlight structure.

[0038] The backlight structure provided in the embodiments of this application will be described below with reference to the accompanying drawings. It should be noted that in the drawings, the x-direction is the first direction, the y-direction is the second direction, and the z-direction is the thickness direction. In the drawings, for ease of drawing, the dimensions are not necessarily proportional to the actual dimensions.

[0039] Please refer to Figures 1 to 3 , Figure 1 This is a side view schematic diagram of the backlight structure of some embodiments of this application. Figure 2 An example is shown. Figure 1 A magnified view of the backlight structure at position A. Figure 3 A schematic diagram of the structure of an example diffuser plate is shown from below.

[0040] like Figures 1 to 3 As shown, an embodiment of this application provides a backlight structure 10, including a substrate 100, a diffuser plate 200, and a plurality of light-emitting devices 300, wherein the plurality of light-emitting devices 300 are disposed on one side of the substrate 100. The diffuser plate 200 is disposed on the side of the plurality of light-emitting devices 300 away from the substrate 100. The diffuser plate 200 includes a plate body 210 and a plurality of first ink elements 220 located on the side of the plate body 210 facing the light-emitting devices 300, wherein the plurality of first ink elements 220 are correspondingly disposed with respect to the plurality of light-emitting devices 300. The plate body 210 includes a central region 211 and an edge region 212 surrounding the central region 211. The first ink elements 220 are disposed in both the central region 211 and the edge region 212. The area of ​​the orthographic projection of the first ink element 220 located in the edge region 212 onto the plate body 210 is smaller than the area of ​​the orthographic projection of the first ink element 220 located in the central region 211 onto the plate body 210.

[0041] Optionally, the diffuser plate 200 also includes a plurality of second ink elements 230 located on the side of the plate body 210 opposite to the light-emitting device 300, with the plurality of second ink elements 230 corresponding to the plurality of light-emitting devices 300. The function of the first ink element 220 is to block and weaken the central light source, achieving a preliminary light uniformity effect. The function of the second ink element 230 is to perform secondary light uniformity. After the light emitted by the light-emitting device 300 enters the plate body 210, it can be reflected back and forth between the first ink element 220 and the second ink element 230, which helps to adjust the light path in the plate body 210, thereby further improving the light uniformity of the backlight structure 10.

[0042] The first ink component 220 and the second ink component 230 can both be white ink, and the first ink component 220 and the second ink component 230 can be prepared onto the plate 210 by screen printing or other processes.

[0043] Optionally, the material of the plate 210 is transparent glass, and the light transmittance of either the first ink component 220 or the second ink component 230 is less than the light transmittance of the plate 210.

[0044] Optionally, the orthographic projection of the first ink element 220 on the plate 210 lies within the orthographic projection of the second ink element 230 on the plate 210, and the distance between two adjacent second ink elements 230 is less than the distance between two adjacent first ink elements 220. Thus, the smaller area of ​​the first ink element 220 results in a larger distance between two adjacent first ink elements 220, allowing more light from the light-emitting device 300 to enter the plate 210. Conversely, the larger area of ​​the second ink element 230 results in a smaller distance between two adjacent second ink elements 230, making it easier for light entering the plate 210 to be reflected and diffused by the second ink elements 230.

[0045] Optionally, the light-emitting device 300 can be any one of LED, Mini LED, or Micro LED. The light-emitting device 300 is fixed to the substrate 100 by encapsulating adhesive 400, and the orthographic projection of the encapsulating adhesive 400 on the substrate 100 covers the orthographic projection of the corresponding light-emitting device 300 on the substrate 100.

[0046] Optionally, the orthographic projection shapes of the first ink element 220 and the second ink element 230 are consistent with the orthographic projection shape of the light-emitting device 300. The shape of the light-emitting device 300 can be at least one of a circle, an ellipse, a polygon, or an irregular shape. In this embodiment, the orthographic projection shapes of the first light-emitting device 300, the first ink element 220, and the second ink element 230 are all rectangular, as an example.

[0047] The backlight structure 10 of this embodiment divides the plate 210 into a middle area 211 and an edge area 212 surrounding the middle area 211. The projected area of ​​the first ink element 220 located in the edge area 212 is smaller than that of the first ink element 220 located in the middle area 211. This makes the blocking effect of the first ink element 220 in the edge area 212 less than that in the middle area 211. More light from the light-emitting device 300 aligned with the edge area 212 can enter the plate 210 without passing through the first ink element 220, which helps to improve the light output efficiency of the edge area 212, alleviates the dark area phenomenon at the seam of two adjacent diffuser plates 200, and makes the display brightness at the seam of two adjacent diffuser plates 200 more consistent with the display brightness of the rest of the area, thereby improving the light output uniformity of the backlight structure 10.

[0048] In some embodiments, the plate 210 is rectangular in shape, and includes two first sides 213 extending along a first direction (x direction in the figure) and two second sides 214 extending along a second direction (y direction in the figure). The first direction x, the second direction y, and the thickness direction of the plate 210 (z direction in the figure) intersect each other. A plurality of first ink elements 220 are arranged in rows and columns along the first direction x and the second direction y. The width of the first ink element 220 located in the edge region 212 in the first direction x is smaller than the width of the first ink element 220 located in the middle region 211 in the first direction x, and / or, the width of the first ink element 220 located in the edge region 212 in the second direction y is smaller than the width of the first ink element 220 located in the middle region 211 in the second direction y.

[0049] It should be noted that the dimensions of the orthographic projection shape of each light-emitting device 300 are equal, and the dimensions of the orthographic projection shape of each first ink element 220 located in the middle region 211 are also equal. Any first ink element 220 located in the edge region 212 can have a width smaller in the first direction x than the first ink element 220 located in the middle region 211, or a width smaller in the second direction y than the first ink element 220 located in the middle region 211, or a width smaller in both the first and second directions x and y. Furthermore, the direction of width reduction among multiple first ink elements 220 located in the same edge region 212 can be the same or different.

[0050] The orthographic projection shape of the middle area 211 is a rectangle, and the orthographic projection shape of the edge area 212 is a rectangular frame.

[0051] Optionally, the edge region 212 may contain only one row of first ink elements 220, meaning the edge region 212 may only have a ring of first ink elements 220 surrounding the central region 211. Of course, in other embodiments, the number of rows of first ink elements 220 within the edge region 212 can be adjusted as needed.

[0052] The backlight structure 10 of this application embodiment achieves a smaller projected area of ​​the first ink element 220 located in the edge region 212 than that of the first ink element 220 located in the middle region 211 by making the width of the first ink element 220 located in the edge region 212 smaller than that of the first ink element 220 located in the middle region 211.

[0053] In some embodiments, the center of the first ink element 220 located in the edge region 212 is aligned with the center of the light-emitting device 300 disposed opposite to it.

[0054] Optionally, the center of the first ink element 220 located in the middle area 211 and the center of the light-emitting device 300 positioned opposite it are also aligned.

[0055] Optionally, the orthographic projection shape of the first ink element 220 located in the middle area 211 and the first ink element 220 located in the edge area 212 are both square, and the ratio of the width of the first ink element 220 located in the edge area 212 to the width of the first ink element 220 located in the middle area 211 in any direction is in the range of 1 / 3-3 / 4.

[0056] It should be noted that since both the first ink element 220 located in the middle region 211 and the first ink element 220 located in the edge region 212 are aligned with the center of the corresponding light-emitting device 300, and the width of the first ink element 220 located in the edge region 212 is smaller than the width of the first ink element 220 located in the middle region 211, it can be understood that the first ink element 220 located in the edge region 212 is dimensionally reduced towards the center. Even after the dimensional reduction, the center of the first ink element 220 located in the edge region 212 remains aligned with the center of the corresponding light-emitting device 300. Therefore, the first ink element 220 provides consistent light uniformity to the light-emitting device 300 in all radial directions, reducing the risk of uneven regional brightness caused by the off-center arrangement of the first ink element 220 and the light-emitting device 300.

[0057] The backlight structure 10 of this application embodiment aligns the first ink element 220 located in the middle region 211 and the first ink element 220 located in the edge region 212 with the center of the corresponding light-emitting device 300. This reduces the risk of uneven regional brightness caused by the off-center arrangement of the first ink element 220 and the light-emitting device 300.

[0058] Please refer to Figures 4 to 6 , Figure 4 A side view schematic diagram of another example of a backlight structure is shown. Figure 5 An example is shown. Figure 4 A magnified schematic diagram of the backlight structure at position B. Figure 6 A bottom view of another example of a diffuser plate is shown.

[0059] like Figures 4 to 6As shown, the edge region 212 includes a first region 215, a second region 216, and a corner region 217. The first region 215 is located on both sides of the middle region 211 in the first direction x, and the width of the first ink element 220 located in the first region 215 in the first direction x is smaller than the width of the first ink element 220 located in the middle region 211 in the first direction x. The second region 216 is located on both sides of the middle region 211 in the second direction y, and the width of the first ink element 220 located in the second region 216 in the second direction y is smaller than the width of the first ink element 220 located in the middle region 211 in the second direction y. The corner region 217 is located on both sides of the first region 215 in the first direction x, and the width of the first ink element 220 located in the corner region 217 in the first direction x is smaller than the width of the first ink element 220 located in the middle region 211 in the first direction x, and the width of the first ink element 220 located in the corner region 217 in the second direction y is smaller than the width of the first ink element 220 located in the middle region 211 in the second direction y.

[0060] It is easy to understand that, since the orthographic projection shape of the edge area 212 is a rectangle, there are two of each of the first area 215 and the second area 216, and four of the corner areas 217.

[0061] Optionally, the first ink element 220 includes a first sub-ink element 221 located in the first region 215, a second sub-ink element 222 located in the second region 216, a third sub-ink element 223 located in the corner region 217, and a fourth sub-ink element 224 located in the middle region 211. The ratio of the width of the first sub-ink element 221 in the first direction x to the width of the fourth sub-ink element 224 in the first direction x is between 1 / 3 and 3 / 4; the ratio of the width of the second sub-ink element 222 in the second direction y to the width of the fourth sub-ink element 224 in the second direction y is between 1 / 3 and 3 / 4. The ratio of the width of the third sub-ink element 223 in the first direction x to the width of the fourth sub-ink element 224 in the first direction y is between 1 / 3 and 3 / 4.

[0062] Optionally, the width of the first sub-ink element 221 in the second direction y is equal to the width of the fourth sub-ink element 224 in the second direction y, and the width of the second sub-ink element 222 in the first direction x is equal to the width of the fourth sub-ink element 224 in the first direction x. The orthographic projection shape of the fourth sub-ink element 224 is a square. Since both the first and second sub-ink elements 221 and 222 are unidirectionally indented, their orthographic projection shapes are both rectangles. The third sub-ink element 223 is indented in both the first direction x and the second direction y. The indentation dimensions of the third sub-ink element 223 in the first direction x and the second direction y can be equal or unequal. When the indentation dimensions of the third sub-ink element 223 in the first direction x and the second direction y are equal, its orthographic projection shape is a square. When the indentation dimensions of the third sub-ink element 223 in the first direction x and the second direction y are unequal, its orthographic projection shape is a rectangle. The area of ​​the orthographic projection shape of the third sub-ink element 223 is smaller than the area of ​​the orthographic projection shape of the first sub-ink element 221 and the second sub-ink element 222. The area of ​​the orthographic projection shape of the first sub-ink element 221 is equal to the area of ​​the orthographic projection shape of the second sub-ink element 222, and both are smaller than the area of ​​the orthographic projection shape of the fourth sub-ink element 224.

[0063] It should be noted that, because the orthographic projection shape of the plate 210 has two first sides 213 and two second sides 214, the refraction of light at the sidewalls of the plate 210 is different from the refraction of light inside the plate 210, resulting in low light intensity at the sidewalls of the plate 210. Since both the first region 215 and the second region 216 have one sidewall of the plate 210, and the corner region 217 has two sidewalls of the plate 210, the dark band at the corner region 217 is the most obvious in the related technology, followed by the first region 215 and the second region 216.

[0064] The backlight structure 10 of this application embodiment reduces the dimensions of the first sub-ink element 221 located in the first region 215 and the second sub-ink element 222 located in the second region 216 in the direction close to the side wall of the plate 210, and reduces the dimensions of the third sub-ink element 223 located in the corner region 217 in both directions. This minimizes the light-blocking effect of the third sub-ink element 223, and the light-blocking effect of the first sub-ink element 221 and the second sub-ink element 222 is less than that of the fourth sub-ink element 224. This alleviates the brightness difference between the corner region 217 and the first region 215 and the second region 216, and also alleviates the brightness difference between the edge region 212 and the middle region 211, thereby improving the light emission uniformity of the backlight structure 10.

[0065] In some embodiments, the center of the orthographic projection of the first ink element 220 located in the edge region 212 onto the plate 210 is located on the side of the center of the light-emitting device 300 located on the plate 210 facing the middle region 211.

[0066] In this design, the spacing (dimension L3 in the figure) between any two adjacent first ink elements 220 located in the middle area 211 is equal. The minimum spacing between the first ink element 220 located in the edge area 212 and the edge of the plate 210 is defined as the first distance (dimension L1 in the figure), and the minimum spacing between the first ink element 220 located in the edge area 212 and the first ink element 220 located in the middle area 211 is defined as the second distance (dimension L2 in the figure). The first distance L1 is greater than the second distance L2, and the second distance L2 is equal to the spacing L3 between the first ink elements 220 in the middle area 211.

[0067] The backlight structure 10 of this embodiment reduces the size of the first ink element 220 located in the edge region 212 in one direction, making the first ink element 220 offset from the aligned light-emitting device 300. Furthermore, the distance between the first ink element 220 and the edge of the plate 210 is greater than the distance between the first ink element 220 and the first ink element 220 in the middle region 211. This allows more light to enter the plate 210 from the area between the first ink element 220 in the edge region 212 and the edge of the plate 210, balancing the influence of the edge of the plate 210 on the light intensity and thus improving the light emission uniformity of the backlight structure 10. By making the distance between the first ink element 220 in the edge region 212 and the first ink element 220 in the middle region 211 equal to the distance between the first ink elements 220 inside the middle region 211, the light intensity consistency between the area of ​​the edge region 212 facing the middle region 211 and the inside of the middle region 211 is improved, further enhancing the light emission uniformity of the backlight structure 10.

[0068] In some embodiments, there are multiple diffuser plates 200 arranged in a direction parallel to the substrate 100. Adjacent diffuser plates 200 are connected, and a seam 201 is formed between adjacent diffuser plates 200. The spacing between any two adjacent light-emitting devices 300 is equal. The orthographic projection of the seam 201 on the substrate 100 lies between the orthographic projections of the two adjacent light-emitting devices 300 on the substrate 100, and the orthographic projection of the seam 201 on the substrate 100 is equal to the spacing between the light-emitting devices 300 located on both sides.

[0069] Optionally, the projected area of ​​the substrate 100 is larger than the projected area of ​​the diffuser plate 200, and one substrate 100 is aligned with multiple diffuser plates 200 spliced ​​together.

[0070] Optionally, the projected area of ​​the substrate 100 is equal to the projected area of ​​the diffuser plate 200, and multiple substrates 100 and multiple diffuser plates 200 are aligned and spliced ​​together to form a large backlight structure 10. In this embodiment, the distance between the light-emitting device 300 near the edge of the substrate 100 and the edge of the substrate 100 is half the distance between any two adjacent light-emitting devices 300, so that after the substrates 100 are spliced, the distance between the light-emitting devices 300 on both sides of the seam is equal to the distance between any two light-emitting devices 300 on the same substrate 100, thereby improving the light emission uniformity of the light-emitting devices 300 on the substrate 100.

[0071] The second aspect of this application also provides a display module including the backlight structure 10 of any of the first aspect embodiments described above. Since the display module provided in the second aspect of this application includes the backlight structure 10 of any of the above embodiments, it possesses the beneficial effects of the backlight structure 10 of any of the above embodiments, which will not be elaborated further here.

[0072] The third aspect of this application also provides a display device, including the display module described above. The display device in this application includes, but is not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landlines, control consoles, and other devices with display functions.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A backlight structure, characterized in that, include: substrate; Multiple light-emitting devices are disposed on one side of the substrate; A diffuser plate is disposed on the side of the plurality of light-emitting devices facing away from the substrate; the diffuser plate includes a plate body and a plurality of first ink elements located on the side of the plate body facing the light-emitting devices, the plurality of first ink elements being disposed corresponding to the plurality of light-emitting devices; The plate includes a central area and an edge area surrounding the central area. The first ink element is provided in both the central area and the edge area. The area of ​​the orthographic projection of the first ink element located in the edge area on the plate is smaller than the area of ​​the orthographic projection of the first ink element located in the central area on the plate.

2. The backlight structure as described in claim 1, characterized in that, The plate is rectangular in shape and includes two first sides extending along a first direction and two second sides extending along a second direction. The first direction, the second direction and the thickness direction of the plate are arranged to intersect each other. Multiple first ink elements are arranged in rows and columns along the first direction and the second direction. The width of the first ink element located in the edge region in the first direction is smaller than the width of the first ink element located in the middle region in the first direction, and / or, the width of the first ink element located in the edge region in the second direction is smaller than the width of the first ink element located in the middle region in the second direction.

3. The backlight structure as described in claim 2, characterized in that, The edge region includes: The first region is located on both sides of the middle region in the first direction, and the width of the first ink element located in the first region in the first direction is smaller than the width of the first ink element located in the middle region in the first direction. The second region is located on both sides of the middle region in the second direction, and the width of the first ink element located in the second region in the second direction is smaller than the width of the first ink element located in the middle region in the second direction. The corner area is located on both sides of the first area in the first direction. The width of the first ink element in the corner area in the first direction is smaller than the width of the first ink element in the middle area in the first direction. The width of the first ink element in the corner area in the second direction is smaller than the width of the first ink element in the middle area in the second direction.

4. The backlight structure as described in claim 3, characterized in that, The first ink element includes a first sub-ink element located in the first area, a second sub-ink element located in the second area, a third sub-ink element located in the corner area, and a fourth sub-ink element located in the middle area; The ratio of the width of the first sub-ink element in the first direction to the width of the fourth sub-ink element in the first direction is in the range of 1 / 3 to 3 / 4. The ratio of the width of the second sub-ink element in the second direction to the width of the fourth sub-ink element in the second direction is in the range of 1 / 3 to 3 / 4. The ratio of the width of the third sub-ink element in the first direction to the width of the fourth sub-ink element in the first direction is in the range of 1 / 3 to 3 / 4, and the ratio of the width of the third sub-ink element in the second direction to the width of the fourth sub-ink element in the second direction is in the range of 1 / 3 to 3 / 4.

5. The backlight structure as described in claim 1, characterized in that, The center of the orthographic projection of the first ink element located in the edge region on the plate body is located on the side of the orthographic projection of the light-emitting device located opposite it on the plate body facing the middle region.

6. The backlight structure as described in claim 5, characterized in that, The spacing between any two adjacent first ink elements located in the middle area is equal; The minimum distance between the first ink element located in the edge region and the edge of the plate is defined as a first distance, and the minimum distance between the first ink element located in the edge region and the first ink element located in the middle region is defined as a second distance, wherein the first distance is greater than the second distance.

7. The backlight structure as described in claim 1, characterized in that, The center of the first ink element located in the edge region is aligned with the center of the light-emitting device positioned opposite it.

8. The backlight structure as described in claim 1, characterized in that, The number of diffuser plates is multiple, and the multiple diffuser plates are arranged in a direction parallel to the diffuser plates. Adjacent diffuser plates are connected and a seam is formed between adjacent diffuser plates. The spacing between any two adjacent light-emitting devices is equal, the orthographic projection of the seam on the substrate is located between the orthographic projections of the two adjacent light-emitting devices on the substrate, and the orthographic projection of the seam on the substrate is equal to the spacing between the light-emitting devices located on both sides.

9. A display module, characterized in that, Includes a display screen and a backlight structure as described in any one of claims 1-8.

10. A display device, characterized in that, Includes the display module as described in claim 9.

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