MLED display module and terminal device
By suspending an integrated diverging film and support column structure in the MLED display module, the problem of high temperature risk of the substrate lamp board is solved, the spacing between lamp beads is increased and the light uniformity is improved, and the temperature risk and cost are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SUZHOU CHINA STAR OPTOELECTRONICS TECH CO LTD
- Filing Date
- 2023-07-20
- Publication Date
- 2026-07-24
AI Technical Summary
In existing MLED display modules, the high temperature risk of the substrate lamp board is mainly caused by the large number and high arrangement density of lamp beads, which leads to temperature increase.
A diverging diaphragm is suspended above the LED beads. The diverging diaphragm is integrally formed and covers the entire surface, increasing the light emission angle, reducing the number of LED beads and increasing the spacing. At the same time, the diffuser plate and optical diaphragm are supported by the support column engaging with the through hole of the diverging diaphragm, maintaining uniformity and stability.
By increasing the spacing between the LEDs and the light emission angle, the temperature risk of the substrate lamp board is reduced, the number of LEDs is reduced, the cost is lowered, and the uniformity and diffusion effect of the light are improved.
Smart Images
Figure CN117523997B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, specifically to an MLED display module and terminal device. Background Technology
[0002] In existing technologies, the thickness of the entire device needs to be reduced by decreasing the distance between the substrate lamp board and the diffuser plate. Since the light emission angle of the lamp beads is fixed, if the distance between the substrate lamp board and the diffuser plate is to be reduced, the number and arrangement density of the lamp beads need to be increased. This not only leads to higher costs, but also increases the temperature of the substrate lamp board due to the large number and arrangement density of lamp beads, which can lead to high temperature risks.
[0003] Therefore, existing MLED display modules have the technical problem of high temperature risk on the substrate lamp board. Summary of the Invention
[0004] This application provides an MLED display module and terminal device that can alleviate the technical problem of high temperature risk in the substrate lamp board of existing MLED display modules.
[0005] This application provides an MLED display module, including:
[0006] Substrate light board;
[0007] Multiple LED beads, wherein the LED bead array is disposed on the substrate lamp plate;
[0008] A diverging diaphragm is suspended on the side of the lamp bead away from the substrate lamp plate;
[0009] A diffuser plate is disposed on the side of the radiating film away from the substrate lamp plate;
[0010] The radiating diaphragm includes multiple radiating structures arranged in an array, the radiating structures being arranged opposite each other in the light emission direction of the lamp beads, and the radiating diaphragm is integrally formed and has a full surface.
[0011] Optionally, in some embodiments of this application, the MLED display module further includes a support column, the bottom end of which is placed on the substrate lamp plate, and the top end of which abuts against the diffuser plate.
[0012] Optionally, in some embodiments of this application, the diverging diaphragm is provided with a plurality of through holes, a support post passes through one of the through holes, and the support post is engaged with the through hole of the diverging diaphragm.
[0013] Optionally, in some embodiments of this application, adjacent support columns have the same longitudinal cross-sectional shape, adjacent support columns have the same cross-sectional area at the same height, and adjacent through holes have the same shape and equal diameter.
[0014] Optionally, in some embodiments of this application, the longitudinal cross-sectional shape of the support column is trapezoidal, the bottom diameter d1 of the support column is greater than the top diameter d2 of the support column, and the diameter of the through hole is d3, satisfying: d1>d3>d2.
[0015] Optionally, in some embodiments of this application, the material used to prepare the diverging membrane is the same as the material used to prepare the diffuser plate.
[0016] Optionally, in some embodiments of this application, the diverging structure is a protrusion with an arc-shaped outline, and the convex surface of the protrusion faces the diffuser plate.
[0017] Optionally, in some embodiments of this application, the thickness of the radiating diaphragm ranges from 0.1 mm to 0.3 mm.
[0018] Optionally, in some embodiments of this application, the spacing d4 between adjacent LED beads ranges from 10 mm to 40 mm.
[0019] This application provides a terminal device, which includes the MLED display panel described in any of the above embodiments.
[0020] Beneficial effects: The radiating film is suspended above multiple LED beads. The radiating film is integrally formed and is set on the entire surface, which increases the light emission angle of the light emitted by the LED beads after passing through the radiating film and increases the spacing between the LED beads, thereby reducing the number of LED beads and alleviating the technical problem of high temperature risk of substrate lamp board in existing MLED display modules. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a cross-sectional schematic diagram of the MLED display module provided in this application;
[0023] Figure 2 This is a schematic diagram of the structure of the MLED display module provided in this application;
[0024] Figure 3 This is a schematic diagram of the structure of the diverging film of the MLED display module provided in this application;
[0025] Figure 4This is a schematic diagram of the optical path of the MLED display module provided in this application.
[0026] Explanation of reference numerals in the attached figures:
[0027] Detailed Implementation
[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.
[0029] Please see Figure 1 , Figure 2 The MLED display module provided in this application includes a substrate lamp plate 10, a plurality of lamp beads 20, a diverging film 30, and a diffuser plate 40. The lamp beads 20 are arrayed on the substrate lamp plate 10. The diverging film 30 is suspended on the side of the lamp beads 20 away from the substrate lamp plate 10. The diffuser plate 40 is disposed on the side of the diverging film 30 away from the substrate lamp plate 10. The diverging film 30 includes a plurality of diverging structures 301 arranged in an array. One of the diverging structures 301 is disposed opposite to the light emission direction of one of the lamp beads 20. The diverging film 30 is integrally formed and disposed on the entire surface.
[0030] In this embodiment, by suspending the diverging film 30 above multiple LED beads 20, and by integrally forming and covering the entire surface of the diverging film 30, the light emission angle of the light emitted by the LED beads 20 after passing through the diverging film 30 is increased, and the spacing between the LED beads 20 is increased, thereby reducing the number of LED beads 20 and alleviating the technical problem of high temperature risk of the substrate lamp board 10 in existing MLED display modules.
[0031] The technical solution of this application will now be described in conjunction with specific embodiments.
[0032] The radius, material, shape, etc. of the diverging structure 301 in this application are described only with reference to the best or preferred embodiment. Other ranges that can meet the display requirements of the MLED display module should also fall within the protection scope of this invention, and will not be described in detail here.
[0033] In one embodiment, please refer to Figure 1 The MLED display module also includes a support column 50, the bottom end of which is placed on the substrate lamp plate 10, and the top end of which abuts against the diffuser plate 40.
[0034] The diffuser plate 40 is provided with an optical film 60 on the side away from the substrate lamp plate 10. The optical film 60 includes, but is not limited to, a brightness enhancement film.
[0035] The top surface of the support column 50 and the bottom surface of the support column 50 are both flat, which allows the support column 50 to be set more stably and helps to make the upper diffuser plate 40 and optical film 60 set horizontally.
[0036] It is understood that the support column 50 is used to support the diffuser plate 40 and the optical film 60. The more horizontally the diffuser plate 40 and the optical film 60 are set, the more uniform their light dispersion or other gain effects will be, thus avoiding the problem of uneven light output.
[0037] In one embodiment, please refer to Figure 1 The radiating membrane 30 is provided with a plurality of through holes, and a support post 50 passes through one of the through holes, and the support post 50 is engaged with the through hole of the radiating membrane 30.
[0038] Both the vias and the support columns 50 can be arranged in an array.
[0039] A via may be provided between adjacent diverging structures 301.
[0040] Alternatively, a via may be provided in a corresponding integral area composed of multiple divergent structures 301.
[0041] It is understandable that by distributing the vias evenly in an array, when the support post 50 engages with the vias of the dispersion membrane, the supporting force of the support post 50 on each part of the dispersion membrane is more uniform, thus avoiding the problem of damage caused by uneven force on the dispersion membrane.
[0042] In this embodiment, the diverging diaphragm 30 has a through hole at the position where the support column 50 is provided. One support column 50 passes through one through hole, and the diverging diaphragm 30 engages with the support column 50 through the through hole, thereby achieving the suspended setting of the diverging diaphragm 30.
[0043] In one embodiment, adjacent support columns 50 have the same outline shape, adjacent support columns 50 have the same cross-sectional area at the same height, and adjacent through holes have the same shape and equal diameter.
[0044] The radiating diaphragm 30 is horizontally disposed above the substrate lamp plate 10.
[0045] In particular, the thickness of the diverging diaphragm 30 is uniformly set in different regions, which can improve the uniformity of light emission in different regions of the diverging diaphragm 30.
[0046] The cross-sectional shape of the support column 50 is circular, and the cross-sectional shape of the through hole is also circular.
[0047] It is understood that adjacent support columns 50 are of equal height and have the same shape. At the same height, adjacent support columns 50 have the same cross-sectional area, thereby making the radiating diaphragm 30 horizontally positioned above the substrate lamp plate 10, which improves the uniformity of the light emitted by the radiating diaphragm 30.
[0048] In one embodiment, the external profile of the support column 50 can be either a cone or a cylinder.
[0049] In one embodiment, please refer to Figure 1 The longitudinal section of the support column 50 is trapezoidal, and the bottom diameter d1 of the support column 50 is greater than the top diameter d2 of the support column 50. The diameter of the through hole is d3, satisfying the condition: d1 > d3 > d2.
[0050] The cross-sectional shape of the support column 50 can be the same as the shape of the through hole. In this case, the diverging diaphragm 30 is engaged at a horizontal plane where the cross-sectional area of the support column 50 is equal to the cross-sectional area of the through hole.
[0051] It is understood that by limiting the diameter of the via to d3 to be greater than the top diameter d2 of the support column 50, the support column 50 can partially pass through the via. Conversely, by limiting the diameter of the via to d3 to be less than the bottom diameter d1 of the support column 50, a gap is created between the radiating diaphragm 30 and the substrate lamp plate 10, allowing light to propagate a certain distance before being diffused by the radiating diaphragm 30, thereby further enhancing the diffusion effect.
[0052] In one embodiment, please refer to Figure 3 The radius of the divergent structure 301 ranges from 50 micrometers to 200 micrometers.
[0053] It is understandable that the radius of the diverging structure 301 also affects the divergence effect. If the radius of the diverging structure 301 is too large, the refractive surface S1 of the diverging structure 301 will be close to horizontal, resulting in a poor divergence effect on the light. If the radius of the diverging structure 301 is too small, the thickness of the diverging film 30 will be large, affecting the overall thickness of the MLED display module. Therefore, the radius of the diverging structure 301 needs to be limited, and the radius range is from 50 micrometers to 200 micrometers.
[0054] It should be noted that the position of the diverging diaphragm 30 suspended between the substrate lamp plate 10 and the diffuser plate 40 also affects its divergence effect. The farther the diverging diaphragm 30 is from the substrate lamp plate 10, the larger the angle at which the light emitted by the lamp bead 20 reaches the diverging diaphragm 30. After the light comes into contact with the diverging diaphragm 30, it will be dispersed again to increase the light emission angle. Therefore, without changing the radius of the diverging structure 301, the farther the diverging diaphragm 30 is from the substrate lamp plate 10, the better the divergence effect of the diverging diaphragm 30 on the light emitted by the lamp bead 20.
[0055] In this embodiment, by adjusting the position of the diverging film 30 suspended between the substrate lamp plate 10 and the diffuser plate 40, and the radius of the diverging structure 301, the diverging effect of the diverging film 30 can be adjusted to obtain the desired light emission angle.
[0056] In one embodiment, the material used to prepare the diverging diaphragm 30 is the same as the material used to prepare the diffuser plate 40.
[0057] It is understandable that by using the same material for the preparation of the diverging membrane 30 and the diffuser plate 40, the process is simplified and the cost is reduced.
[0058] Furthermore, the diverging diaphragm 30 may be made of the same material as any of the optical diaphragms 60, and the thickness range of the diverging diaphragm 30 may be the same as the thickness range of the optical diaphragm 60.
[0059] In one embodiment, the radiating membrane 30 may be integrally formed with the diffuser plate 40.
[0060] The radiating film 30 is located on the side surface of the diffuser plate 40 facing the substrate lamp plate 10.
[0061] The thickness of the radiating membrane 30 is less than the thickness of the diffuser plate 40.
[0062] In one embodiment, please refer to Figure 3The longitudinal cross-sectional shape of the divergent structure 301 can be any one of the following: arc shape, trapezoid, triangle, rectangle, or square.
[0063] In one embodiment, please refer to Figure 3 , Figure 4 The diverging structure 301 is a protrusion with an arc-shaped outline, and the convex surface of the protrusion faces the diffuser plate 40.
[0064] in, Figure 4 The diagram also shows the light path of the light from the LED bead 20 after it reaches the diverging diaphragm 30. The first angle α of the incident light 70 is less than the divergence angle β of the refracted light 80, meaning that the diverging diaphragm 30 plays the role of diverging light.
[0065] The inner surface of the protrusion facing the lamp bead is a refractive surface S1, which is arc-shaped. Both sides of the protrusion refract the light to a certain extent, which will not be described in detail here.
[0066] It is understandable that the arc shape of the refracting surface is more conducive to the divergence of light and improves the light divergence effect.
[0067] It is understood that the arc-shaped protrusion can be prepared by providing a roller with an arc-shaped protrusion. Specifically, a semi-finished radiating membrane 30 with the entire surface is first prepared, and the protrusion is formed on the radiating membrane 30 by the roller rolling on the radiating membrane 30. The outline shape of the protrusion complements the outline shape of the protrusion.
[0068] In this embodiment, the diverging structure 301 is a protrusion with an arc-shaped outline, which not only simplifies the fabrication process of the diverging structure 301, but also improves the light divergence effect, thereby further increasing the spacing of the LED beads 20 in the MLED display panel and reducing the risk of high temperature being generated inside the substrate lamp board 10.
[0069] In one embodiment, the thickness of the radiating diaphragm 30 ranges from 0.1 mm to 0.3 mm.
[0070] It is understood that the thickness of the diffuser plate 40 is in the range of 1 mm to 3 mm. The smaller the thickness of the diverging diaphragm 30, the better the light-diffusing effect of its diverging structure 301. By reducing the thickness of the diverging diaphragm 30 to be smaller than the thickness of the diffuser plate 40, it is beneficial to improve the diverging effect of the diverging diaphragm 30 on the light emitted by the lamp bead 20.
[0071] It should be noted that, compared to the embodiment in which the diverging structure 301 is integrally formed on the diffuser plate 40, by setting a smaller diverging film 30, the divergence effect of light passing through the diverging film 30 can be improved to a greater extent.
[0072] In one embodiment, please refer to Figure 4 The spacing d4 between adjacent LED beads 20 ranges from 10 mm to 40 mm.
[0073] It is understandable that the spacing of the LED beads 20 is related to the size of the display module and the number of LED beads 20. For example, the spacing of the LED beads 20 in the existing MLED display module ranges from 5 mm to 20 mm. By setting the diverging film 30, this application can effectively reduce the number of LED beads 20, and the spacing of the LED beads 20 will also increase by about 100%. For the spacing of LED beads 20 in display modules of other sizes, by setting the diverging film 30, the number of LED beads 20 can also be effectively reduced, and the spacing of the LED beads 20 will increase accordingly.
[0074] In one embodiment, the vertical distance OD between the substrate lamp plate 10 and the diffuser plate 40 can be reduced by about half compared to existing products without the diffuser film 30.
[0075] For example, in commonly used display modules, the vertical distance between the substrate lamp plate 10 and the diffuser plate 40 ranges from 20 mm to 30 mm, while in low-cost MLED display modules, the vertical distance between the substrate lamp plate 10 and the diffuser plate 40 ranges from about 5 mm. For these different display modules, the diverging film 30 provided in this application can reduce the vertical distance between the substrate lamp plate 10 and the diffuser plate 40 by at least half.
[0076] This application provides a diverging film 30 between the substrate lamp plate 10 and the diffuser plate 40. The diverging film 30 can be suspended by engaging with the support column 50 through its vias. By utilizing the light diverging effect of the diverging film 30, the light emission angle is improved. This allows for sufficient light emission range without the need for excessively dense LED beads 20, reducing the number of LED beads 20 and increasing the spacing between adjacent LED beads 20. This alleviates the risk of high temperature inside the substrate lamp plate 10 caused by the large number and dense arrangement of LED beads 20. In addition, by providing the diverging film 30, the vertical distance OD value between the substrate lamp plate 10 and the diffuser plate 40 can also be reduced.
[0077] Meanwhile, compared to existing technologies that directly set the lens structure on the protective shell of a single LED bead, the diverging diaphragm of this application is suspended by engaging with the support post through its vias. Compared to the protective shell lens structure in the prior art, not only is the spacing between the diverging diaphragm and the substrate lamp board adjustable to meet different light emission angle requirements, but it can also further increase the distance between the light emitted by the LED bead and the diverging diaphragm. Since the diverging diaphragm is farther away from the substrate lamp board, the divergence effect on the light emitted by the LED bead is better, which can greatly improve the light emission angle, thereby reducing the number of LED beads and alleviating the technical problem of high temperature risk of the substrate lamp board in existing MLED display modules.
[0078] This application also proposes a display device and a terminal device, both of which include the above-mentioned MLED display module, which will not be described in detail here.
[0079] The MLED display module provided in this application includes a substrate lamp board, multiple LED chips, a diverging film, and a diffuser plate. The LED chip array is disposed on the substrate lamp board, the diverging film is suspended on the side of the LED chips away from the substrate lamp board, and the diffuser plate is disposed on the side of the diverging film away from the substrate lamp board. The diverging film includes multiple diverging structures arranged in an array, with one diverging structure positioned opposite to the light emission direction of one LED chip. The diverging film is integrally formed and covers the entire surface. By suspending the diverging film above multiple LED chips, and by making the diverging film integrally formed and covering the entire surface, the light emission angle of the light emitted by the LED chips after passing through the diverging film is increased, and the spacing between the LED chips is increased, thereby reducing the number of LED chips and alleviating the technical problem of high temperature risk of the substrate lamp board in existing MLED display modules.
[0080] 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.
[0081] The MLED display module provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. An MLED display module, characterized in that, include: Substrate light board; Multiple LED beads, wherein the LED bead array is disposed on the substrate lamp plate; A diverging diaphragm is suspended on the side of the lamp bead away from the substrate lamp plate; A diffuser plate is disposed on the side of the radiating film away from the substrate lamp plate; The radiating film includes multiple radiating structures arranged in an array, which are positioned opposite each other in the light emission direction of the LED beads. The radiating film is integrally formed and covers the entire surface. The MLED display module also includes a support column, the bottom end of which is placed on the substrate lamp plate, and the top end of which abuts against the diffuser plate. The radiating film has multiple through holes, and one support column passes through one of the through holes. The support column is engaged with the through hole of the radiating film.
2. The MLED display module as described in claim 1, characterized in that, The adjacent support columns have the same longitudinal cross-sectional shape, the adjacent support columns have the same cross-sectional area at the same height, and the adjacent through holes have the same shape and the same diameter.
3. The MLED display module as described in claim 1, characterized in that, The longitudinal section of the support column is trapezoidal, and the bottom diameter d1 of the support column is greater than the top diameter d2 of the support column. The diameter of the through hole is d3, satisfying the condition: d1 > d3 > d2.
4. The MLED display module as described in claim 1, characterized in that, The material used to prepare the diverging membrane is the same as that used to prepare the diffuser plate.
5. The MLED display module as described in claim 1, characterized in that, The diverging structure is a protrusion with an arc-shaped outline, and the convex surface of the protrusion faces the diffuser plate.
6. The MLED display module as described in claim 1, characterized in that, The thickness of the radiating diaphragm ranges from 0.1 mm to 0.3 mm.
7. The MLED display module as described in claim 1, characterized in that, The spacing d4 between adjacent LED beads ranges from 10 mm to 40 mm.
8. A terminal device, characterized in that, The terminal device includes an MLED display panel as described in any one of claims 1 to 7.