LED lamp bead structure and light source module
By setting a lens structure in the LED lamp bead structure, the luminous angle of the lamp bead is expanded, and the problem of low luminous angle of the lamp bead in the prior art is solved, and the effect of reducing the number of lamp beads and reducing costs is achieved.
Patent Information
- Application Number
- CN202421552055.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-02
AI Technical Summary
In the existing LED backlight structure, the light luminous angle of the lamp bead is small, which leads to excessive use of lamp beads and high cost.
By setting a lens structure in the LED lamp bead structure, the light output distribution of the LED chip is changed and the light emission angle of the lamp bead is expanded.
The light emitting angle of the lamp beads is increased so that a more sparse lamp bead arrangement can be adopted in the backlight module, reducing the number of LED lamp bead structures, thereby reducing costs.
Smart Images
Figure CN222840037U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of light source technology, and in particular to an LED lamp bead structure and a light source module. Background Art
[0002] The current LED backlight structure is divided into two technical routes: COB (Chip On Board, chip direct mounting technology) and POB (Package On Board, packaged devices are mounted on PCB substrate). POB has become the mainstream due to its advantages such as mature upstream packaging industry, high production yield, and relatively low cost. The common POB LED light distribution curve generally conforms to the Lambertian distribution, and the light emitting angle of the lamp beads is small. In backlight products, more densely arranged lamp beads are required to meet the brightness uniformity, which leads to excessive use of lamp beads and high cost.
[0003] Therefore, the current technology still needs to be improved and enhanced. Utility Model Content
[0004] The present application provides an LED lamp bead structure and a light source module, which can increase the light-emitting angle of the lamp bead to alleviate the current problem of high cost caused by the small light-emitting angle of the lamp bead.
[0005] The present application provides an LED lamp bead structure, including:
[0006] LED chips;
[0007] The lead frame includes a metal pad and a plastic bracket located on the metal pad; the plastic bracket is provided with a cup cavity to expose the metal pad; the LED chip is mounted on the metal pad, and the cup cavity is filled with a glue layer to cover the LED chip;
[0008] The lens structure is arranged on the plastic support and covers the cup mouth of the cup cavity.
[0009] In some embodiments of the LED lamp bead structure, the lens structure is snap-connected with the plastic bracket.
[0010] In some embodiments of the LED lamp bead structure, the edge of the plastic bracket is provided with a protruding structure;
[0011] A lens buckle adapted to the protruding structure is arranged in the lens structure.
[0012] In some embodiments of the LED lamp bead structure, a positioning structure is provided on the periphery of the cup mouth in the plastic bracket;
[0013] A positioning portion adapted to the positioning structure is arranged in the lens structure.
[0014] In the LED lamp bead structure of some embodiments, a positioning frustum is provided on the periphery of the cup mouth in the plastic bracket;
[0015] A step surface matched with the positioning frustum is arranged in the lens structure.
[0016] In some embodiments of the LED lamp bead structure, a groove is provided in the plastic bracket at the periphery of the cup mouth;
[0017] A protrusion matched with the groove is arranged in the lens structure.
[0018] In some embodiments of the LED lamp bead structure, one or more positioning posts are arranged on the periphery of the cup mouth in the plastic bracket;
[0019] A positioning hole matched with the positioning column is arranged in the lens structure.
[0020] In the LED lamp bead structure of some embodiments, a concave cavity is formed on one side of the lens structure close to the LED chip;
[0021] The inner wall of the cavity is curved to form a light incident surface of the lens structure.
[0022] In the LED lamp bead structure of some embodiments, a pit is formed on a side of the lens structure away from the LED chip.
[0023] In the LED lamp bead structure in some embodiments, the cross section of the pit is circular, and two opposite sides of the longitudinal section of the pit are curved.
[0024] In some embodiments of the LED lamp bead structure, the metal pad includes a first pad and a second pad, the first pad and the second pad are separated by a through groove; the through groove is filled with plastic.
[0025] In the LED lamp bead structure in some embodiments, the LED chip is disposed on a first pad, the LED chip is electrically connected to the first pad via a first bonding wire, and the LED chip is electrically connected to the second pad via a second bonding wire.
[0026] In the LED lamp bead structure of some embodiments, the LED chip includes a first chip and a second chip, the first chip is arranged on the first pad, and the second chip is arranged on the second pad;
[0027] The first chip is electrically connected to the first pad via a first bonding wire, the second chip is electrically connected to the second pad via a second bonding wire, and the first chip is electrically connected to the second chip via a third bonding wire.
[0028] The embodiment of the present application further provides a light source module, which includes a PCB substrate, on which a plurality of the above-mentioned LED lamp bead structures are mounted.
[0029] The present application provides an LED lamp bead structure and a light source module, wherein the LED lamp bead structure includes an LED chip, a lead frame and a lens structure; wherein the lead frame includes a metal pad and a plastic bracket located on the metal pad; a cup cavity is provided in the plastic bracket, and the bottom of the cup cavity partially exposes the metal pad; the LED chip is mounted on the metal pad, and the cup cavity is filled with a glue layer to cover the LED chip; the lens structure is provided on the plastic bracket and covers the mouth of the cup cavity. In the LED lamp bead structure in the present application, the light distribution of the LED chip can be changed by providing a lens structure, so as to expand the light output angle of the LED lamp bead structure. Then, when the LED lamp bead structure is formed into a backlight module, compared with LED lamp beads with a small light output angle, more sparsely arranged LED lamp beads can meet the brightness uniformity, thereby reducing the number of LED lamp bead structures, which is conducive to reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.
[0031] Figure 1 A schematic diagram of the structure of the LED lamp bead provided in an embodiment of the present application.
[0032] Figure 2 This is a schematic structural diagram of the first embodiment of the lead frame in the LED lamp bead structure provided in the embodiment of the present application.
[0033] Figure 3 This is a structural schematic diagram of the first embodiment of the lens structure in the LED lamp bead structure provided in the embodiment of the present application.
[0034] Figure 4 This is a structural schematic diagram of a second embodiment of the lens structure in the LED lamp bead structure provided in an embodiment of the present application.
[0035] Figure 5 This is a structural schematic diagram of the second embodiment of the lead frame in the LED lamp bead structure provided in the embodiment of the present application.
[0036] Figure 6 This is a structural schematic diagram of the third embodiment of the lens structure in the LED lamp bead structure provided in the embodiment of the present application.
[0037] Figure 7 A schematic structural diagram of a third embodiment of the lead frame in the LED lamp bead structure provided in an embodiment of the present application.
[0038] Reference numerals:
[0039] 10. LED chip; 11. first chip; 12. second chip;
[0040] 20. lead frame; 21. metal pad; 211. first pad; 212. second pad; 22. plastic bracket; 221. cup cavity; 222. positioning structure; 223. groove; 224. positioning column; 23. protruding structure; 25. plastic;
[0041] 30. lens structure; 31. lens buckle; 32. positioning portion; 33. positioning hole; 34. cavity; 341. light incident surface; 35. pit; 351. light exit surface; 36. raised portion;
[0042] 40. Adhesive layer;
[0043] 51. First bonding wire; 52. Second bonding wire; 53. Third bonding wire. DETAILED DESCRIPTION
[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. The features specified as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.
[0046] Please also read Figure 1 and Figure 2 The present embodiment provides an LED lamp bead structure, which includes an LED chip 10, a lead frame 20 and a lens structure 30; wherein the lead frame 20 includes a metal pad 21 and a plastic bracket 22 located on the metal pad 21; a cup cavity 221 is provided in the plastic bracket 22, and the bottom of the cup cavity 221 partially exposes the metal pad 21; the LED chip 10 is mounted on the metal pad 21, and the cup cavity 221 is filled with a glue layer 40 to cover the LED chip 10; the lens structure 30 is provided on the plastic bracket 22 and covers the cup mouth of the cup cavity 221. In the LED lamp bead structure in the present embodiment, the light distribution of the LED chip 10 can be changed by providing the lens structure 30, so as to expand the light output angle of the LED lamp bead structure. Then, when the LED lamp bead structure is formed into a backlight module, the number of LED lamp bead structures can be reduced, which is conducive to reducing costs.
[0047] Among them, the lead frame 20 is a carrier of a chip, and is also a key structural component that uses bonding materials (gold wire, aluminum wire, copper wire) to achieve electrical connection between the internal circuit lead end of the chip and the external lead to form an electrical circuit, and acts as a bridge to connect with external wires.
[0048] In some embodiments, the glue layer 40 filled with the cup cavity 221 in the lead frame 20 is a glue layer 40 with fluorescent powder, which is equivalent to filling the cup cavity 221 with glue mixed with fluorescent powder. Among them, the optional materials of fluorescent powder include aluminate series such as YAG powder, silicate series, nitride series, sulfide series such as KSF powder, β-sialon series materials; the optional materials of glue are silica gel and silicone resin. In this embodiment, the light emitted by the LED chip 10 will be optically processed for the first time through the glue layer 40, and then optically processed for the second time through the lens structure 30; wherein, the glue layer 40 is equivalent to the primary lens, and the lens structure 30 is equivalent to the secondary lens.
[0049] As an embodiment, the main material of the lens structure 30 may be silicone.
[0050] In some embodiments, the lens structure 30 is snap-connected with the plastic bracket 22. In this embodiment, the lens structure 30 is snap-connected with the plastic bracket 22, and there is no need to fix the lens structure 30 with glue during the lens assembly process, thereby effectively reducing the glue dispensing and curing processes, simplifying the process flow, and reducing costs.
[0051] Please also read Figure 3 As an embodiment, a protruding structure 23 is provided on the edge of the plastic bracket 22; a lens buckle 31 adapted to the protruding structure 23 is provided in the lens structure 30; when assembling the lens, the lens buckle 31 can be directly engaged with the protruding structure 23 on the edge of the plastic bracket 22 to achieve fixation between the lens structure 30 and the lead frame 20, thereby reducing the process of dispensing and curing to reduce the process cost.
[0052] In some embodiments, a positioning structure 222 is provided on the periphery of the cup mouth in the plastic bracket 22; and a positioning portion 32 adapted to the positioning structure 222 is provided in the lens structure 30. In this embodiment, by providing the positioning structure 222 in the plastic bracket 22 and providing the positioning portion 32 adapted to the positioning structure 222 in the lens structure 30; when the lens is assembled, the lens structure 30 and the lead frame 20 can be quickly positioned, the positioning accuracy of the lens structure 30 and the lead frame 20 can be improved, and the consistency of the light pattern can be improved.
[0053] In some embodiments, a positioning truncated cone (such as Figure 2 The lens structure 30 is provided with a stepped surface adapted to the positioning truncated cone (as shown in Figure 3When assembling the lens, the step surface of the lens structure 30 is directly fitted with the surface of the positioning cone, and the lens structure 30 and the lead frame 20 are quickly positioned by the positioning cone and the step surface, thereby improving the positioning accuracy of the lens structure 30 and the lead frame 20, thereby improving the consistency of the light pattern.
[0054] Please also read Figure 4 and Figure 5 In some embodiments, a groove 223 is provided in the plastic support 22 at the periphery of the cup mouth; and a protrusion 36 adapted to the groove 223 is provided in the lens structure 30. When assembling the lens, the protrusion 36 in the lens structure 30 is directly placed in the groove 223 of the plastic support 22, so as to realize the rapid positioning between the lens structure 30 and the lead frame 20, improve the positioning accuracy of the lens structure 30 and the lead frame 20, and further improve the consistency of the light pattern.
[0055] Please also read Figure 6 and Figure 7 In some embodiments, one or more positioning posts 224 are provided on the periphery of the cup mouth in the plastic support 22; and a positioning hole 33 adapted to the positioning post 224 is provided in the lens structure 30. When assembling the lens, the positioning hole 33 in the lens structure 30 is directly aligned with the positioning post 224 in the plastic support 22, so that the positioning post 224 can be inserted into the positioning hole 33, thereby realizing rapid positioning between the lens structure 30 and the lead frame 20, improving the positioning accuracy of the lens structure 30 and the lead frame 20, and further improving the consistency of the light pattern.
[0056] Please continue reading Figure 3 In some embodiments, a concave cavity 34 is formed on one side of the lens structure 30 close to the LED chip 10; the inner wall of the cavity 34 is curved to form a light incident surface 341 of the lens structure 30; equivalent to an arch-shaped opening on the side of the lens structure 30 close to the LED chip 10. After the emitted light of the LED chip 10 passes through the adhesive layer 40, it enters the lens structure 30 through the light incident surface 341 of the lens structure 30, and the emitted light of the LED chip 10 is redesigned through the lens structure 30 to expand the light output angle of the LED lamp bead structure.
[0057] In some embodiments, a pit 35 is formed on one side of the lens structure 30 away from the LED chip 10; the wall of the pit 35 forms a light emitting surface 351 of the lens structure 30. In this embodiment, the provision of a pit 35 is conducive to further improving the light emitting angle of the LED chip 10.
[0058] Specifically, the cross section of the pit 35 is circular, and two opposite sides of the longitudinal section of the pit 35 are curves, which are convex curves; thereby, the light from the LED chip 10 can further expand the light output angle through the lens structure 30 .
[0059] It should be noted that the parameters such as the light incident surface 341 , the light exit surface 351 , the diameter and the height of the lens structure 30 in this embodiment can be designed according to the requirements of different light types, and this application does not limit this.
[0060] Please continue reading Figure 1 In some embodiments, the metal pad 21 includes a first pad 211 and a second pad 212, and the first pad 211 and the second pad 212 are separated by a through groove; the through groove is filled with plastic 25 to insulate the first pad 211 from the second pad 212. The first pad 211 is a positive pad, and the second pad 212 is a negative pad.
[0061] Specifically, an LED chip 10 is set in each LED lamp bead structure, and the LED chip 10 can be set on the first soldering pad 211, the positive electrode of the LED chip 10 is electrically connected to the first soldering pad 211 through the first bonding wire 51, and the negative electrode of the LED chip 10 is electrically connected to the second soldering pad 212 through the second bonding wire 52.
[0062] In some embodiments, a plurality of LED chips 10 may be provided for each LED lamp bead structure. For example, two LED chips 10 are provided. Then, the LED chip 10 includes a first chip 11 and a second chip 12 (eg, Figure 1 At this time, the first chip 11 is arranged on the first pad 211, and the second chip 12 is arranged on the second pad 212; wherein the positive electrode of the first chip 11 is electrically connected to the first pad 211 through the first bonding wire 51, the negative electrode of the second chip 12 is electrically connected to the second pad 212 through the second bonding wire 52, and the negative electrode of the first chip 11 is electrically connected to the positive electrode of the second chip 12 through the third bonding wire 53.
[0063] The embodiment of the present application also provides a backlight module, which includes a PCB substrate, on which a plurality of the above-mentioned LED lamp bead structures are mounted; because the LED lamp bead structure is provided with a lens structure 30 to form a secondary lens, the light output angle of the LED lamp bead structure can be effectively expanded, thereby reducing the amount of LED lamp bead structure in the backlight module, thereby reducing the cost of the backlight module. Since the LED lamp bead structure is described in detail above, it will not be repeated here.
[0064] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0065] The above is a detailed introduction to the LED lamp bead structure provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An LED lamp bead structure, characterized in that: include: LED chips; A lead frame, the lead frame comprising a metal pad and a plastic bracket located on the metal pad; the plastic bracket is provided with a cup cavity to expose the metal pad; the LED chip is mounted on the metal pad, and the cup cavity is filled with a glue layer to cover the LED chip; The lens structure is arranged on the plastic support and covers the cup mouth of the cup cavity.
2. The LED lamp bead structure according to claim 1, characterized in that: The lens structure is snap-connected with the plastic bracket.
3. The LED lamp bead structure according to claim 2, characterized in that: The edge of the plastic bracket is provided with a protruding structure; The lens structure is provided with a lens buckle adapted to the protruding structure.
4. The LED lamp bead structure according to claim 1, characterized in that: A positioning structure is provided in the plastic bracket at the periphery of the cup mouth; The lens structure is provided with a positioning portion adapted to the positioning structure.
5. The LED lamp bead structure according to claim 1, characterized in that: A positioning frustum is provided in the plastic support at the periphery of the cup mouth; The lens structure is provided with a step surface adapted to the positioning frustum.
6. The LED lamp bead structure according to claim 1, characterized in that: The plastic bracket is provided with a groove at the periphery of the cup mouth; The lens structure is provided with a protrusion matched with the groove.
7. The LED lamp bead structure according to claim 1, characterized in that: One or more positioning posts are arranged in the plastic bracket at the periphery of the cup mouth; The lens structure is provided with a positioning hole adapted to the positioning column.
8. The LED lamp bead structure according to any one of claims 1 to 7, characterized in that: A concave cavity is formed on one side of the lens structure close to the LED chip; The inner wall of the cavity is curved to form a light incident surface of the lens structure.
9. The LED lamp bead structure according to claim 8, characterized in that: A pit is formed on a side of the lens structure away from the LED chip.
10. The LED lamp bead structure according to claim 9, characterized in that: The cross section of the pit is circular, and two opposite sides of the longitudinal section of the pit are curved lines.
11. The LED lamp bead structure according to claim 10, characterized in that: The metal pad includes a first pad and a second pad, wherein the first pad and the second pad are separated by a through slot; and the through slot is filled with plastic.
12. The LED lamp bead structure according to claim 11, characterized in that: The LED chip is disposed on the first pad, the LED chip is electrically connected to the first pad via a first bonding wire, and the LED chip is electrically connected to the second pad via a second bonding wire.
13. The LED lamp bead structure according to claim 11, characterized in that: The LED chip includes a first chip and a second chip, the first chip is arranged on the first pad, and the second chip is arranged on the second pad; The first chip is electrically connected to the first pad via a first bonding wire, the second chip is electrically connected to the second pad via a second bonding wire, and the first chip is electrically connected to the second chip via a third bonding wire.
14. A light source module, characterized in that: The light source module comprises a PCB substrate, on which a plurality of LED lamp bead structures as described in any one of claims 1 to 13 are mounted.