Light-emitting module and display device

Abstract

The utility model provides a kind of light-emitting module and display device, the light-emitting module includes light-emitting structure and light adjusting structure;Light-emitting structure includes multiple light-emitting substrates, first positioning part is equipped on each light-emitting substrate;Light adjusting structure is located in the light-emitting structure light-emitting side, light adjusting structure includes multiple light adjusting substrates, each light adjusting substrate is set to the light-emitting direction of a light-emitting substrate, and second positioning part is equipped on each light adjusting substrate;Wherein, multiple light-emitting substrates are mutually spliced, multiple light adjusting substrates are mutually spliced, and each first positioning part is set to the alignment of corresponding second positioning part, so that in the assembly process of backlight module, so that light-emitting substrate and corresponding light adjusting substrate can be aligned using the same positioning reference, improve the alignment accuracy between light-emitting substrate and corresponding light adjusting substrate, to reduce the relative position assembly deviation between light-emitting substrate and corresponding light adjusting substrate, improve the optical efficiency of light-emitting module, and improve the display effect of display device.

Description

Technical Field

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

[0002] In the backlight design of display modules, a combination of light-emitting diodes (LEDs) and lenses is typically used to achieve high brightness and uniform optical display effects. To ensure optical performance, the center line of the LED and the center line of the lens must be aligned as closely as possible, and the assembly tolerances between them must be strictly controlled to avoid light misalignment or uneven brightness.

[0003] In related technologies, when the backlight module is large in size or modularly spliced, due to the processing tolerances in the backlight module forming process and the accumulation of positional deviations in the assembly process, the light-emitting diodes far from the positioning reference and the center lines of the corresponding lenses are prone to misalignment, which leads to problems such as reduced optical efficiency, uneven display brightness, light spot distortion or color shift, thus affecting the overall display effect and user experience. Utility Model Content

[0004] The present invention provides a light-emitting module and a display device. By providing a first positioning part and a second positioning part on the light-emitting substrate and the corresponding dimming substrate respectively, and aligning the first positioning part with the corresponding second positioning part, the light-emitting substrate and the dimming substrate can be aligned using the same positioning reference during the assembly process of the backlight module, thereby improving the alignment accuracy of the light-emitting substrate and the dimming substrate and reducing the relative position assembly deviation between the light-emitting substrate and the dimming substrate.

[0005] To achieve the above functions, the technical solution provided by this utility model embodiment is as follows: An embodiment of this utility model provides a light-emitting module, comprising: A light-emitting structure includes multiple light-emitting substrates, each of which is provided with a first positioning portion; A dimming structure is provided on the light-emitting side of the light-emitting structure. The dimming structure includes a plurality of dimming substrates, each dimming substrate being disposed corresponding to one light-emitting substrate, and each dimming substrate being provided with a second positioning part. In this configuration, multiple light-emitting substrates are spliced ​​together, multiple dimming substrates are spliced ​​together, and each first positioning part is aligned with the corresponding second positioning part.

[0006] Optionally, in one embodiment, the spacing between two adjacent light-emitting substrates is equal to the spacing between two adjacent dimming substrates.

[0007] Optionally, in one embodiment, the spacing between two adjacent light-emitting substrates is greater than or equal to 0.3 mm and less than or equal to 2 mm.

[0008] Optionally, in one embodiment, the orthographic projection of the dimming substrate overlaps with the orthographic projection of the light-emitting substrate in a direction perpendicular to the plane where the light-emitting module is located.

[0009] Optionally, in one embodiment, the size of the light-emitting substrate along the length of the light-emitting module is greater than or equal to 60 mm and less than or equal to 300 mm.

[0010] Optionally, in one embodiment, the light-emitting substrate includes a plurality of light-emitting elements; The dimming substrate includes a plurality of dimming elements, each dimming element being disposed corresponding to a light-emitting element, and the optical center line of each dimming element coinciding with the optical center line of the corresponding light-emitting element.

[0011] Optionally, in one embodiment, the distance between the optical center lines of two adjacent light-emitting elements is greater than or equal to 4 mm and less than or equal to 10 mm.

[0012] Optionally, in one embodiment, the first positioning part and the second positioning part are both one of the positioning hole, positioning pin and positioning block.

[0013] Optionally, in one embodiment, the light-emitting module further includes a back plate and an optical film layer disposed opposite to each other, and the light-emitting structure is disposed between the back plate and the optical film layer; The distance between the side of the optical film layer away from the back plate and the side of the back plate away from the light-emitting module is greater than or equal to 12 mm and less than or equal to 40 mm.

[0014] This utility model embodiment also provides a display device, which includes any of the light-emitting modules described above.

[0015] The beneficial effects of this utility model embodiment are as follows: This utility model provides a light-emitting module and a display device. The light-emitting module includes a light-emitting structure and a dimming structure. The light-emitting structure includes multiple light-emitting substrates, each of which has a first positioning part. The dimming structure is located on the light-emitting side of the light-emitting structure and includes multiple dimming substrates. Each dimming substrate is correspondingly disposed in the light-emitting direction of a light-emitting substrate, and each dimming substrate has a second positioning part. The multiple light-emitting substrates are spliced ​​together, and the multiple dimming substrates are spliced ​​together. Each first positioning part is aligned with the corresponding second positioning part. Thus, during the assembly process of the backlight module, the light-emitting substrates and the corresponding dimming substrates can be aligned using the same positioning reference, improving the alignment accuracy between the light-emitting substrates and the corresponding dimming substrates, thereby reducing the relative position assembly deviation between the light-emitting substrates and the corresponding dimming substrates, improving the optical efficiency of the light-emitting module, and improving the display effect of the display device. Attached Figure Description

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

[0017] Figure 1 A schematic diagram of the structure of the light-emitting module provided in an embodiment of this utility model; Figure 2 A schematic diagram of the assembly structure of the light-emitting substrate and the dimming substrate provided in an embodiment of this utility model; Figure 3 A top view schematic diagram of the assembly structure of the light-emitting substrate and the dimming substrate provided in an embodiment of this utility model; Figure 4 Provided for the embodiments of this utility model Figure 1 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the structure of the display device provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1-Light-emitting module; 11-Light-emitting structure; 111-Light-emitting substrate; 111A-First positioning part; 111B-Light-emitting element; 12-Dimming structure; 121-Dimming substrate; 121A-Second positioning part; 121B-Dimming element; 13-Back plate; 130-Receiving cavity; 131-Bottom plate; 132-Side plate; 1321-Mounting groove; 14-Optical film layer; 141-Optical film; W1-Center line of light-emitting element; W2-Center line of dimming element; X-First direction; Y-Second direction; Z-Third direction; 2-Display device; 21-Display panel. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower in the actual use or working mode of the device, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only, and features specified as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections or connections that allow for communication; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] The following disclosure provides many different embodiments for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, examples of various specific processes and materials are provided, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0023] This embodiment provides a light-emitting module 1, which can be installed on one side of the backlight of the display panel 21 to provide a uniform and stable light source for the display panel 21, thereby ensuring the brightness and image quality of the display device 2.

[0024] like Figures 1 to 4 As shown, the light-emitting module 1 includes a light-emitting structure 11, which includes multiple light-emitting substrates 111. Each light-emitting substrate 111 can be spliced ​​together along the length and / or width of the display panel 21 to cover the entire display area. By splicing multiple light-emitting substrates 111 together instead of a single large-size light-emitting substrate 111, the manufacturing difficulty of a single board can be reduced, making it easier to transport, assemble and maintain the module. When a light-emitting substrate 111 fails, only a portion of the substrate needs to be replaced, thereby reducing maintenance costs and improving system reliability.

[0025] The light-emitting module 1 further includes a dimming structure 12, which is disposed on the light-emitting side of the light-emitting structure 11 and is used to modulate and homogenize the light emitted by the light-emitting structure 11 to improve the optical performance of the light-emitting module 1. Specifically, the dimming structure 12 includes a plurality of dimming substrates 121, which are spliced ​​together, and each dimming substrate 121 corresponds to a light-emitting substrate 111, so that the light emitted by each light-emitting substrate 111 is modulated by the corresponding dimming substrate 121, thereby ensuring the optical uniformity of the light-emitting module 1. The "modulation" includes, but is not limited to, adjusting the light intensity distribution, beam divergence angle, spectral characteristics and polarization state of the light to improve the brightness uniformity, color temperature consistency and luminous efficiency of the light-emitting module 1.

[0026] It should be noted that the length direction of the light-emitting module 1 is defined as the first direction X, the width direction of the light-emitting module 1 is defined as the second direction Y, and the height direction of the light-emitting module 1 is defined as the third direction Z; in this embodiment, the first direction is used as... Figure 1 The X direction in the middle, the second direction is Figure 1 In the Y direction, the third direction is Figure 1 Let's take the Z direction as an example to illustrate.

[0027] Specifically, each of the light-emitting substrates 111 is provided with a first positioning part 111A, and each of the dimming substrates 121 is provided with a second positioning part 121A. Multiple light-emitting substrates 111 and multiple dimming substrates 121 can be combined by splicing. By aligning the first positioning part 111A of each light-emitting substrate 111 with the second positioning part 121A of the corresponding dimming substrate 121, the light-emitting substrate 111 and the dimming substrate 121 can be precisely aligned during the assembly process. This allows the light-emitting substrate 111 and the dimming substrate 121 to be aligned and installed using the same positioning reference, thereby improving the alignment accuracy between the light-emitting structure 11 and the corresponding dimming structure 12, and reducing the relative positional assembly deviation between the light-emitting structure 11 and the dimming structure 12.

[0028] It is understood that by setting each of the first positioning parts 111A and the corresponding second positioning parts 121A to be aligned, this embodiment ensures that the optical axis between the light-emitting structure 11 and the dimming structure 12 is aligned, reducing the light offset and light leakage problems caused by positional deviation; at the same time, it improves the assembly efficiency and consistency of the light-emitting module 1, thereby improving the luminous efficiency and display uniformity of the light-emitting module 1.

[0029] Furthermore, the first positioning part 111A and the second positioning part 121A are both including but not limited to one of positioning holes, positioning pins, and positioning blocks, and the specific structural form can be selected according to actual design requirements; specifically, each light-emitting substrate 111 may be provided with a plurality of first positioning parts 111A, and each dimming substrate 121 may be provided with a plurality of second positioning parts 121A, and the number of second positioning parts 121A is equal to the number of first positioning parts 111A, so that each second positioning part 121A can be aligned one-to-one with the corresponding first positioning part 111A, thereby ensuring the accurate relative position between the light-emitting substrate 111 and the corresponding dimming substrate 121; wherein, in this embodiment, the specific structural form of the first positioning part 111A and the second positioning part 121A is not limited.

[0030] Specifically, both the first positioning part 111A and the second positioning part 121A can be positioning hole structures. The light-emitting substrate 111 is provided with a first positioning hole, and the dimming substrate 121 is provided with a second positioning hole. By aligning the first positioning hole and the corresponding second positioning hole, the initial positioning of the light-emitting substrate 111 and the corresponding dimming substrate 121 can be achieved. With the help of positioning pins inserted in the first positioning hole and the second positioning hole, reliable fixation between the light-emitting substrate 111 and the corresponding dimming substrate 121 can be achieved. The number of the first positioning hole and the second positioning hole is equal, and the number of both can be two or more, so as to improve the positioning accuracy and anti-displacement capability between the light-emitting substrate 111 and the corresponding dimming substrate 121.

[0031] Furthermore, the first positioning part 111A can also be a positioning block, and the second positioning part 121A can also be a positioning hole. By inserting the positioning block into the corresponding positioning hole, rapid assembly and positioning between the light-emitting substrate 111 and the corresponding dimming substrate 121 can be achieved, ensuring splicing accuracy and reducing the risk of misalignment caused by tolerance accumulation. The shape, size and number of the positioning block and the positioning hole can be designed and adjusted according to the assembly accuracy requirements, and this embodiment does not impose any restrictions on this.

[0032] Please continue to combine Figures 1 to 4 In one embodiment, the distance E1 between two adjacent light-emitting substrates 111 is equal to the distance E2 between two adjacent dimming substrates 121, so that the light-emitting substrates 111 and the dimming substrates 121 can form a one-to-one structural correspondence after assembly, avoiding misalignment or boundary overlap.

[0033] Specifically, during the actual assembly of the light-emitting module 1, the distance E1 between two adjacent light-emitting substrates 111 is greater than or equal to 0.3 mm and less than or equal to 2 mm; for example, the distance E1 between two adjacent light-emitting substrates 111 can be set to 0.3 mm, 0.6 mm, 0.9 mm, 1.2 mm, 1.5 mm, or 2 mm. Correspondingly, the distance E2 between two adjacent dimming substrates 121 is greater than or equal to 0.3 mm and less than or equal to 2 mm; for example, the distance E2 between two adjacent dimming substrates 121 can be set to 0.3 mm, 0.6 mm, 0.9 mm, 1.2 mm, 1.5 mm, or 2 mm.

[0034] It is understood that by setting the distance E1 between two adjacent light-emitting substrates 111 to be equal to the distance E2 between two adjacent dimming substrates 121, the splicing gap between the multiple light-emitting substrates 111 is aligned with the splicing gap between the multiple dimming substrates 121, thereby maintaining the stability of the light emission direction of the light-emitting substrates 111 and preventing the light emission module from having local brightness unevenness.

[0035] Furthermore, by setting the spacing E1 between two adjacent light-emitting substrates 111 and the spacing E2 between two adjacent dimming substrates 121, both are greater than or equal to 0.3 mm and less than or equal to 2 mm, the risk of light leakage at the seam caused by excessively large splicing gaps is avoided, resulting in visible bright lines or dark bands. In addition, it prevents the splicing gaps from being too small, which could cause the seam to become jammed due to deformation or thermal expansion and contraction of the dimming element 121B, thus affecting the service life of the light-emitting module 1.

[0036] Furthermore, the light-emitting substrate 111 includes a plurality of light-emitting elements 111B, which serve as the light source of the light-emitting module 1 and are used to provide uniform and stable illumination to the display panel 21; wherein, the light-emitting elements 111B include, but are not limited to, light-emitting diodes (LEDs).

[0037] The dimming substrate 121 includes a plurality of dimming elements 121B, each dimming element 121B being disposed corresponding to a light-emitting element 111B, and the optical center line W2 of each dimming element 121B coinciding with the optical center line W1 of the corresponding light-emitting element 111B, thereby ensuring that the light emission direction of the light-emitting element 111B is consistent with the optical axis of the dimming element 121B, avoiding problems such as light emission deviation, uneven brightness, or abnormal color mixing caused by the offset of the optical center line.

[0038] It should be noted that the optical center line W1 of the light-emitting element 111B refers to the axis extending along the light-emitting direction of the light-emitting element 111B through the optical light-emitting center of the light-emitting element 111B, and the optical center line W2 of the dimming element 121B can also refer to the axis extending along the dimming direction of the dimming element 121B through the optical axis of the dimming area of ​​the dimming element 121B.

[0039] Furthermore, the geometric center line W2 of each dimming element 121B coincides with the geometric center line W1 of the corresponding light-emitting element 111B; wherein, the geometric center line of the light-emitting element 111B refers to the normal perpendicular line passing through the geometric center of the light-emitting element 111B, and the geometric center line of the dimming element 121B refers to the normal perpendicular line passing through the geometric center of the dimming element 121B.

[0040] The dimming element 121B includes, but is not limited to, a lens, a diffuser, a microstructure prism sheet, or a combined optical component. By setting the dimming element 121B, the light emitted by the light-emitting element 111B is effectively converged, homogenized, and / or diffused, thereby improving the light field distribution, reducing the probability of the occurrence of local bright spots and dark areas, and improving the brightness uniformity of the light-emitting module 1.

[0041] It should be noted that, for ease of understanding of this technical solution, this embodiment uses the dimming element 121B as a lens as an example for illustration. In related technologies, lenses are typically made of transparent polymer materials such as polycarbonate (PC) and polymethyl methacrylate (PMMA). These materials have a high coefficient of thermal expansion and are prone to significant thermal expansion and contraction when subjected to high and low temperature reliability assessment tests (RA tests) or in application scenarios with large temperature cycles over a long period of time.

[0042] When the lens expands or contracts due to temperature changes, combined with the inherent assembly tolerances between it and the LED, a cumulative tolerance effect occurs, ultimately causing the centerline of the lens to shift from the centerline of the corresponding LED's emitting surface. In other words, the dimming element 121B and the emitting element 111B are spatially misaligned, causing a shift in the beam's emission direction. This prevents some light from entering the effective working area of ​​the corresponding dimming element 121B, resulting in light energy loss and reduced luminous efficiency.

[0043] It is understood that, in this embodiment, by setting the spacing E1 between two adjacent light-emitting substrates 111 to be greater than or equal to 0.3 mm and less than or equal to 2 mm, and the spacing E2 between two adjacent dimming substrates 121 to be greater than or equal to 0.3 mm and less than or equal to 2 mm, sufficient assembly allowance is provided between the adjacent dimming substrates 121. Even after the manufacturing tolerances of the dimming substrates 121, the positioning errors between the light-emitting substrates 111 and the dimming substrates 121, and the thermal expansion of the dimming element 121B due to material properties are superimposed, mechanical interference or extrusion deformation between the adjacent dimming substrates 121 can still be avoided, thereby preventing failure problems such as warping and cracking of the dimming substrates 121 due to local stress concentration.

[0044] Furthermore, it can reduce the risk of relative misalignment between the center line W1 of the light-emitting element 111B and the center line W2 of the corresponding dimming element 121B during high and low temperature cycling tests, so that the center line W2 of each dimming element 121B coincides with or is within an acceptable deviation range (≤0.15 mm) of the center line W1 of the corresponding light-emitting element 111B, thereby improving the optical performance and reliability of the light-emitting module 1.

[0045] Specifically, the distance D1 between the center lines W1 of two adjacent light-emitting elements 111B is greater than or equal to 4 mm and less than or equal to 10 mm; for example, the distance between the center lines W1 of two adjacent light-emitting elements 111B can be set to 4 mm, 6 mm, 8 mm or 10 mm to take into account both optical light mixing effect and display resolution requirements.

[0046] Correspondingly, the distance D1 between the center lines W1 of two adjacent light-emitting elements 111B is equal to the distance D2 between the center lines W2 of two adjacent dimming elements 121B. That is, the distance D2 between the center lines W2 of two adjacent dimming elements 121B is also greater than or equal to 4 mm and less than or equal to 10 mm. For example, the distance between the center lines W2 of two adjacent dimming elements 121B can be set to 4 mm, 6 mm, 8 mm or 10 mm to ensure that the dimming elements 121B correspond one-to-one with the light-emitting elements 111B, thereby avoiding the problems of polarization or uneven light spots.

[0047] It is understood that by limiting the distance D1 between the center lines W1 of two adjacent light-emitting elements 111B to between 4 mm and 10 mm, sufficient margin can be provided for the assembly of the light-emitting substrate 111 and the dimming substrate 121, as well as for the thermal expansion and contraction of the dimming element 121B material due to temperature changes. This absorbs the dimensional tolerances and positioning errors in the manufacturing processes of the light-emitting substrate 111, the dimming substrate 121, and their assembly. At the same time, it can avoid problems such as poor optical mixing, light leakage at the seams, and reduced mechanical strength of the light-emitting module 1 caused by an excessively large distance D1 between the center lines W1 of two adjacent light-emitting elements 111B. Furthermore, it can achieve precise registration between the light-emitting element 111B and the corresponding dimming element 121B, improving the brightness uniformity of the light-emitting module 1.

[0048] Please continue to combine Figures 1 to 4In one embodiment, in a direction perpendicular to the plane of the light-emitting module 1, the orthographic projection of the dimming substrate 121 overlaps with the orthographic projection of the light-emitting substrate 111. Furthermore, in a direction perpendicular to the plane of the light-emitting module 1, the orthographic projection of the dimming substrate 121 overlaps with the orthographic projection of the light-emitting substrate 111, thereby ensuring that the dimming substrate 121 and the corresponding light-emitting substrate 111 are optically aligned in the height direction of the light-emitting module 1. This allows the light emitted by each light-emitting element 111B to accurately enter the corresponding dimming element 121B and exit uniformly in a predetermined direction, effectively avoiding light deflection, light spot deformation, or light leakage due to misalignment, while simultaneously improving the luminous efficiency of the light-emitting module 1.

[0049] Specifically, along the length of the light-emitting module 1, the size C1 of the light-emitting substrate 111 is greater than or equal to 60 mm and less than or equal to 300 mm, and the size C2 of the dimming substrate 121 is greater than or equal to 60 mm and less than or equal to 300 mm; wherein, the size C2 of the dimming substrate 121 is equal to the size C1 of the light-emitting substrate 111.

[0050] It is understood that the direction perpendicular to the plane where the light-emitting module 1 is located can be defined as the height direction of the light-emitting module 1; along the length direction of the light-emitting module 1, the dimension C1 of the light-emitting substrate 111 can be defined as the length of the light-emitting substrate 111 in the X direction, that is, the length from one end of the light-emitting substrate 111 along the X direction to the other end; for example, the length of each light-emitting substrate 111 can be designed to be 60 mm, 100 mm, 140 mm, 180 mm, 220 mm, 260 mm or 300 mm.

[0051] Correspondingly, along the length of the light-emitting module 1, the size C2 of the dimming substrate 121 is greater than or equal to 60 mm and less than or equal to 300 mm; for example, the size C2 of each dimming substrate 121 can be designed to be 60 mm, 100 mm, 140 mm, 180 mm, 220 mm, 260 mm or 300 mm, and the size C2 of the dimming substrate 121 is equal to the size C1 of the light-emitting substrate 111.

[0052] It is understandable that in the large-size light-emitting module 1, since the assembly tolerance and processing tolerance will accumulate linearly along the length of the light-emitting module 1, if the length of a single light-emitting substrate 111 is too large, the alignment error between the light-emitting element 111B and the corresponding dimming element 121B located at the edge of the large-size light-emitting module 1 will increase, which may cause the center lines of the two to shift significantly, thereby causing problems such as edge spot shift, uneven brightness or color deviation.

[0053] This embodiment, by limiting the size C1 of the light-emitting substrate 111 and the size C2 of the dimming substrate 121, can suppress the accumulation of dimensional tolerances during assembly and processing, and control the relative positional deviation between the center line W1 of each light-emitting element 111B and the center line W2 of the corresponding dimming element 121B within an acceptable range (≤0.15 mm). This reduces the risk of misalignment between the light-emitting element 111B and the corresponding dimming element 121B located at the edge of the light-emitting module 1, thereby improving the optical alignment accuracy and brightness uniformity of the light-emitting module 1.

[0054] Furthermore, by providing a first positioning portion 111A on each of the light-emitting substrates 111 and a second positioning portion 121A on each of the dimming substrates 121, and aligning the first positioning portion 111A of each of the light-emitting substrates 111 with the second positioning portion 121A of the corresponding dimming substrate 121, the light-emitting substrates 111 and the corresponding dimming substrates 121 can be aligned using the same positioning reference during assembly. This ensures that even as the size of the light-emitting module 1 increases (i.e., the number of light-emitting substrates 111 and dimming substrates 121 increases), the alignment error between the light-emitting substrates 111 and the corresponding dimming substrates 121 will not increase linearly, thereby reducing the risk of misalignment between the light-emitting element 111B and the corresponding dimming element 121B at the edge of the light-emitting module 1.

[0055] Please continue to combine Figures 1 to 4 In one embodiment, the light-emitting module 1 further includes a back plate 13 and an optical film layer 14 disposed opposite to each other. The light-emitting structure 11 is disposed between the back plate 13 and the optical film layer 14. The optical film layer 14 is used to homogenize, diffuse, or guide the light from the light-emitting structure 11, so that the light is fully mixed and the distribution angle is adjusted before emission, thereby improving the brightness uniformity and light emission consistency of the light-emitting module 1 and reducing local bright spots, dark areas, and color shift phenomena.

[0056] Specifically, the back plate 13 includes a base plate 131 and a plurality of side plates 132. The plurality of side plates 132 extend in a direction away from the base plate 131 and are arranged around the edge of the base plate 131 to form a receiving cavity 130 for accommodating the light-emitting structure 11. The light-emitting structure 11 is mounted on the side of the base plate 131 near the receiving cavity 130, so that the light-emitting structure 11 is firmly positioned and maintains a relatively stable optical light-emitting position. The dimming structure 12 is disposed on the side of the light-emitting structure 11 away from the base plate 131, and further improves the uniformity of light emission by adjusting the light (such as changing the light emission angle or light intensity distribution).

[0057] Furthermore, a mounting groove 1321 is provided on the side of the side plate 132 away from the bottom plate 131. The end of the optical film layer 14 can be embedded in the mounting groove 1321, thereby ensuring that the optical film layer 14 is reliably positioned and flat, and avoiding problems such as warping, displacement or detachment of the optical film layer 14 during long-term use. The optical film layer 14 may include multiple optical films 141, which may include, but are not limited to, a diffuser, a prism sheet and a brightness enhancement sheet, and can be combined according to actual optical design requirements.

[0058] Furthermore, the distance between the side of the optical film layer 14 away from the back plate 13 and the side of the back plate 13 away from the light-emitting module 1 is greater than or equal to 12 mm and less than or equal to 40 mm, that is, the thickness H of the light-emitting module 1 is greater than or equal to 12 mm and less than or equal to 40 mm; for example, the thickness of the light-emitting module 1 can be set to 12 mm, 20 mm, 25 mm, 30 mm, 35 mm or 40 mm.

[0059] It is understood that by limiting the thickness H of the light-emitting module 1, sufficient propagation and mixing paths can be provided for the light emitted from the light-emitting structure 11, avoiding problems such as bright spots, dark areas or uneven colors caused by light being emitted before it is fully mixed.

[0060] Furthermore, the light-emitting module 1 also includes a microlens structure, which is disposed on the side of the dimming structure 12 away from the light-emitting structure 11. Along the height direction of the light-emitting module 1, the orthographic projection of the microlens structure covers the orthographic projection of the dimming structure 12, thereby ensuring that the light processed by the dimming structure 12 can be further guided, focused or diffused by the microlens structure, achieving more precise light field control, improving the brightness uniformity and optical efficiency of the light-emitting module 1, and reducing the occurrence of local bright spots, dark areas or light spot distortion.

[0061] Specifically, the microlens structure includes multiple microlens substrates, each microlens substrate including multiple microlenses, the multiple microlens substrates covering the multiple dimming substrates 121, wherein the number of microlens substrates can be less than or equal to the number of dimming substrates 121, so as to flexibly adjust the coverage of the microlenses according to the size and optical design requirements of the light-emitting module 1, so as to meet the optical uniformity requirements of the light-emitting module 1.

[0062] The technical solutions of the embodiments of this utility model will now be further described with reference to specific examples, so that those skilled in the art can better understand this utility model. It should be noted that the following embodiments and comparative examples were all compared and tested under the same experimental conditions. Except for the parameters that are specifically mentioned to be different, the remaining structures, materials and test methods are the same to ensure that the comparison results are comparable and objective.

[0063] Example 1 Example 1 provides a light-emitting module. The structure of the light-emitting module has been described in detail in the foregoing examples and will not be repeated here. Only the key parameters related to the comparison will be explained.

[0064] In Example 1, the number of light-emitting substrates is 3; the number of dimming substrates is 3; and the material of the dimming element is polymethyl methacrylate (PMMA).

[0065] Along the length of the light-emitting module, the size of the light-emitting substrate is 60 mm, and the size of the dimming substrate is 60.1 mm.

[0066] The spacing between two adjacent light-emitting substrates is 0.3 mm, and the spacing between two adjacent dimming substrates is 0.3 mm.

[0067] The distance between the optical center lines of two adjacent light-emitting elements is 6 mm, and the distance between the optical center lines of two adjacent dimming elements is 6 mm.

[0068] The thickness of the light-emitting module is 21.5 mm.

[0069] After assembly, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element is 0 when measured at room temperature (25°C).

[0070] The light-emitting module was placed in a high and low temperature environment reliability test, with a temperature cycling range of 69°C and 85% humidity, and a cycle count of 1000 hours. After the test, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured again, and it was found to be 0.03 mm.

[0071] Example 2 Example 2 provides a light-emitting module. The structure of the light-emitting module has been described in detail in the foregoing examples and will not be repeated here. Only the key parameters related to the comparison will be explained.

[0072] In Example 2, the number of light-emitting substrates is 3; the number of dimming substrates is 3; and the material of the dimming element is polymethyl methacrylate (PMMA).

[0073] Along the length of the light-emitting module, the size of the light-emitting substrate is 60 mm, and the size of the dimming substrate is 60.1 mm.

[0074] The spacing between two adjacent light-emitting substrates is 2 mm, and the spacing between two adjacent dimming substrates is 2 mm.

[0075] The distance between the optical center lines of two adjacent light-emitting elements is 6 mm, and the distance between the optical center lines of two adjacent dimming elements is 6 mm.

[0076] The thickness of the light-emitting module is 21.5 mm.

[0077] After assembly, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element is 0 when measured at room temperature (25°C).

[0078] The light-emitting module was placed in a high and low temperature environment reliability test, with a temperature cycling range of 69°C and 85% humidity, and a cycle count of 1000 hours. After the test, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured again, and it was found to be 0.03 mm.

[0079] Example 3 Example 3 provides a light-emitting module. The structure of the light-emitting module has been described in detail in the foregoing examples and will not be repeated here. Only the key parameters related to the comparison are described.

[0080] In Example 3, the number of light-emitting substrates is 3; the number of dimming substrates is 3; and the material of the dimming element is polymethyl methacrylate (PMMA).

[0081] Along the length of the light-emitting module, the size of the light-emitting substrate is 60 mm, and the size of the dimming substrate is 60.1 mm.

[0082] The spacing between two adjacent light-emitting substrates is 0.3 mm, and the spacing between two adjacent dimming substrates is 0.3 mm.

[0083] The distance between the optical center lines of two adjacent light-emitting elements is 10 mm, and the distance between the optical center lines of two adjacent dimming elements is 10 mm.

[0084] The thickness of the light-emitting module is 21.5 mm.

[0085] After assembly, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element is 0 when measured at room temperature (25°C).

[0086] The light-emitting module was placed in a high and low temperature environment reliability test, with a temperature cycling range of 69°C and 85% humidity, and a cycle count of 1000 hours. After the test, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured again, and it was found to be 0.05 mm.

[0087] Example 4 Example 4 provides a light-emitting module. The structure of the light-emitting module has been described in detail in the foregoing examples and will not be repeated here. Only the key parameters related to the comparison will be described.

[0088] In Example 4, the number of light-emitting substrates is 3; the number of dimming substrates is 3; and the material of the dimming element is polymethyl methacrylate (PMMA).

[0089] Along the length of the light-emitting module, the size of the light-emitting substrate is 200 mm, and the size of the dimming substrate is 200.5 mm.

[0090] The spacing between two adjacent light-emitting substrates is 0.3 mm, and the spacing between two adjacent dimming substrates is 0.3 mm.

[0091] The distance between the optical center lines of two adjacent light-emitting elements is 6 mm, and the distance between the optical center lines of two adjacent dimming elements is 6 mm.

[0092] The thickness of the light-emitting module is 24.8 mm.

[0093] After assembly, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element is 0 when measured at room temperature (25°C).

[0094] The light-emitting module was placed in a high and low temperature environment reliability test, with a temperature cycling range of 69°C and 85% humidity, and a cycle count of 1000 hours. After the test, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured again, and it was found to be 0.1 mm.

[0095] Comparative Example 1 The structure of the light-emitting module in Comparative Example 1 is exactly the same as that of the light-emitting module in Embodiment 1. The only difference between the light-emitting module in Comparative Example 1 and the light-emitting module in Embodiment 1 is that the size of the light-emitting substrate is 480 mm and the size of the dimming substrate is 480.5 mm along the length direction of the light-emitting module.

[0096] Under the same assembly and testing conditions, in Comparative Example 1, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured at room temperature (25°C) to be 0.03 mm; after high and low temperature cycling tests, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured to be 2 mm; the luminous efficiency of the light-emitting module under steady-state operating conditions was [value missing].

[0097] By comparing Example 1 and Comparative Example 1, it can be seen that when the size of the light-emitting substrate is greater than or equal to 60 mm and less than or equal to 300 mm along the length of the light-emitting module, and the size of the dimming substrate is greater than or equal to 60 mm and less than or equal to 300 mm, the accumulation of tolerances during assembly and processing can be effectively controlled, and the relative positional deviation between the optical center line of each light-emitting element and the corresponding optical center line of the dimming element can be controlled within an acceptable range (≤0.15 mm), thereby improving the luminous efficiency of the light-emitting module.

[0098] When the dimensions of the light-emitting substrate and the dimming substrate both exceed the range of 60 mm to 300 mm along the length of the light-emitting module, the relative positional deviation between the optical center line of the light-emitting element and the corresponding optical center line of the dimming element exceeds 0.15 mm, resulting in light misalignment at the edge of the light-emitting module and a decrease in luminous efficiency.

[0099] Therefore, this embodiment solves the misalignment problem between optical elements and corresponding dimming elements caused by tolerance accumulation in large-size light-emitting modules by setting the size of the light-emitting substrate and the size of the dimming substrate to be greater than or equal to 60 mm and less than or equal to 300 mm in the length direction of the light-emitting module, and improves the optical performance of the light-emitting module.

[0100] Comparative Example 2 The structure of the light-emitting module in Comparative Example 2 is exactly the same as that of the light-emitting module in Example 1. The only difference between the light-emitting module in Comparative Example 2 and the light-emitting module in Example 1 is that the spacing between two adjacent light-emitting substrates is 0.1 mm and the spacing between two adjacent dimming substrates is 0.1 mm.

[0101] Under the same assembly and testing conditions, in Comparative Example 2, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured at room temperature (25°C) to be 0 mm; after high and low temperature cycling tests, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured to be 5 mm.

[0102] By comparing Example 1, Example 2 and Comparative Example 2, it can be seen that when the spacing between two adjacent light-emitting substrates and the spacing between two adjacent dimming substrates are both controlled within 0.3 mm to 2 mm, there is sufficient assembly allowance between the adjacent dimming substrates. Even after the manufacturing tolerances of the dimming substrates, the positioning errors between the light-emitting substrates and the dimming substrates, and the thermal expansion of the dimming element due to material properties are superimposed, mechanical interference or extrusion deformation between the adjacent dimming substrates can still be avoided, thereby preventing failure problems such as warping and cracking of the dimming substrates due to local stress concentration.

[0103] When the spacing between two adjacent light-emitting substrates and the spacing between two adjacent dimming substrates are less than 0.3 mm, due to insufficient splicing gap, the combined effect of manufacturing tolerances and thermal expansion can easily cause interference, warping, or even local cracking at the edges of the two adjacent dimming substrates. This can lead to misalignment between the light-emitting substrate and the corresponding dimming substrate, causing the beam emission direction to shift and resulting in a decrease in the luminous efficiency of the light-emitting module. Conversely, if the spacing is greater than the recommended range, the seam between adjacent substrates will be too wide, which can easily cause light leakage, dark bands, or visible seams, affecting the display effect.

[0104] Therefore, in this embodiment, by setting the spacing between two adjacent light-emitting substrates 111 to be greater than or equal to 0.3 mm and less than or equal to 2 mm, and the spacing between two adjacent dimming substrates 121 to be greater than or equal to 0.3 mm and less than or equal to 2 mm, the light-emitting element and the corresponding dimming element maintain a good optical alignment relationship within the light-emitting module, ensuring accurate incident direction of the light beam, thereby improving the luminous efficiency of the light-emitting module.

[0105] Comparative Example 3 The structure of the light-emitting module in Comparative Example 3 is exactly the same as that of the light-emitting module in Example 1. The difference between the light-emitting module in Comparative Example 3 and the light-emitting module in Example 1 is that the distance between the optical center lines of two adjacent light-emitting elements is 13 mm, and the distance between the optical center lines of two adjacent dimming elements is 13 mm.

[0106] Under the same assembly and testing conditions, in Comparative Example 3, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured at room temperature (25°C) to be 0; after high and low temperature cycling tests, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured to be 0.5 mm.

[0107] By comparing Embodiment 1, Embodiment 3 and Comparative Example 3, it can be seen that when the distance between the optical center lines of two adjacent light-emitting elements is greater than or equal to 4 mm and less than or equal to 10 mm; and the distance between the optical center lines of two adjacent dimming elements is also greater than or equal to 4 mm and less than or equal to 10 mm, problems such as poor optical mixing, light leakage at the seam, and decreased mechanical strength of the light-emitting module 1 caused by excessive spacing can be avoided; thereby, accurate registration of the light-emitting element 111B with the corresponding dimming element 121B can be achieved, improving the luminous efficiency of the light-emitting module.

[0108] When the distance between the optical center lines of two adjacent light-emitting elements and the distance between the optical center lines of two adjacent dimming elements are not within 4 to 10 millimeters, the superposition of adjacent light beams is insufficient or excessive, resulting in obvious dark bands or bright spots in some areas, reduced backlight uniformity, and affecting the energy efficiency of the light-emitting module and user experience.

[0109] Therefore, by controlling the spacing between the optical center lines of two adjacent light-emitting elements and the spacing between the optical center lines of two adjacent dimming elements to between 4 mm and 10 mm, this embodiment can provide sufficient margin for the assembly of the light-emitting substrate and the dimming substrate, as well as for the thermal expansion and contraction of the dimming element material due to temperature changes. This absorbs the dimensional tolerances and positioning errors in the manufacturing processes of the light-emitting substrate, the dimming substrate, and their assembly, thereby improving the luminous efficiency of the light-emitting module.

[0110] Comparative Example 4 The structure of the light-emitting module in Comparative Example 4 is exactly the same as that of the light-emitting module in Example 1. The difference between the light-emitting module in Comparative Example 4 and the light-emitting module in Example 1 is that the thickness of the light-emitting module is 50 mm.

[0111] Under the same assembly and testing conditions, in Comparative Example 4, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured at room temperature (25°C) to be 0; after high and low temperature cycling tests, the distance between the optical center line of the light-emitting element and the optical center line of the corresponding dimming element was measured to be 0.3 mm.

[0112] By comparing Example 1, Example 4 and Comparative Example 4, it can be seen that when the thickness of the light-emitting module is greater than or equal to 12 mm and less than or equal to 40 mm, it can provide sufficient propagation and mixing paths for the light emitted from the light-emitting structure, avoiding bright spots, dark areas or uneven colors caused by light being emitted before it is fully mixed, thereby improving the luminous efficiency of the light-emitting module.

[0113] When the thickness of the light-emitting module is greater than 40 mm, the weight and volume of the module increase significantly, resulting in an excessively thick overall device, which is not conducive to a thin and light design. When the module thickness is less than the recommended value, the module strength is insufficient, and warping and deformation are likely to occur, leading to increased deviations in the spacing of optical components, decreased optical performance, and more likely light leakage, dark areas or light spots to appear at the splicing points, affecting the display effect and long-term reliability.

[0114] Therefore, by limiting the thickness of the light-emitting module, this embodiment can provide sufficient propagation and mixing paths for the light emitted from the light-emitting structure, avoiding problems such as bright spots, dark areas, or uneven colors caused by light being emitted before it is fully mixed.

[0115] Please see Figures 1 to 5 This embodiment also provides a display device 2, which includes a display panel 21 and a light-emitting module 1 as described in any of the above embodiments. The light-emitting module 1 is disposed on the backlight side of the display panel 21, and the display panel 21 includes, but is not limited to, a liquid crystal display panel.

[0116] It is understood that the light-emitting module 1 has been described in detail in the above embodiments, and will not be repeated here.

[0117] In specific applications, the display device 2 can be at least one of the following devices with display functions: smartphone, tablet computer, mobile phone, video phone, e-book reader, desktop computer, laptop computer, netbook, workstation, server, personal digital assistant, portable media player, MP3 player, mobile medical device, camera, game console, digital camera, car navigation system, electronic billboard, ATM, or wearable device.

[0118] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0119] The above provides a detailed description of a light-emitting module and display device provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A light-emitting module, characterized in that, include: A light-emitting structure includes multiple light-emitting substrates, each of which is provided with a first positioning portion; A dimming structure is provided on the light-emitting side of the light-emitting structure. The dimming structure includes a plurality of dimming substrates, each dimming substrate being disposed corresponding to one light-emitting substrate, and each dimming substrate being provided with a second positioning part. In this configuration, multiple light-emitting substrates are spliced ​​together, multiple dimming substrates are spliced ​​together, and each first positioning part is aligned with the corresponding second positioning part.

2. The light-emitting module according to claim 1, characterized in that, The spacing between two adjacent light-emitting substrates is equal to the spacing between two adjacent dimming substrates.

3. The light-emitting module according to claim 2, characterized in that, The spacing between two adjacent light-emitting substrates is greater than or equal to 0.3 mm and less than or equal to 2 mm.

4. The light-emitting module according to claim 1, characterized in that, In a direction perpendicular to the plane where the light-emitting module is located, the orthographic projection of the dimming substrate overlaps with the orthographic projection of the light-emitting substrate.

5. The light-emitting module according to claim 4, characterized in that, Along the length of the light-emitting module, the size of the light-emitting substrate is greater than or equal to 60 mm and less than or equal to 300 mm.

6. The light-emitting module according to claim 1, characterized in that, The light-emitting substrate includes multiple light-emitting elements; The dimming substrate includes a plurality of dimming elements, each dimming element being disposed corresponding to a light-emitting element, and the optical center line of each dimming element coinciding with the optical center line of the corresponding light-emitting element.

7. The light-emitting module according to claim 6, characterized in that, The distance between the optical center lines of two adjacent light-emitting elements is greater than or equal to 4 mm and less than or equal to 10 mm.

8. The light-emitting module according to any one of claims 1 to 7, characterized in that, Both the first positioning part and the second positioning part are one of the following: positioning hole, positioning pin, and positioning block.

9. The light-emitting module according to any one of claims 1 to 7, characterized in that, The light-emitting module also includes a back plate and an optical film layer disposed opposite to each other, and the light-emitting structure is disposed between the back plate and the optical film layer; The distance between the side of the optical film layer away from the back plate and the side of the back plate away from the light-emitting module is greater than or equal to 12 mm and less than or equal to 40 mm.

10. A display device, characterized in that, Includes the light-emitting module as described in any one of claims 1 to 9.

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