CN210107116U

CN210107116U - LED lamp strip

Info

Publication number: CN210107116U
Application number: CN201920878120.XU
Authority: CN
Inventors: 韩继远; 孟长军
Original assignee: Skyworth Photoelectric Technology (shenzhen) Co Ltd
Current assignee: Skyworth Photoelectric Technology (shenzhen) Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-02-21
Anticipated expiration: 2029-06-12

Abstract

The utility model belongs to the technical field of the LED, a LED lamp strip is specifically disclosed. The bracket of the LED assembly of the LED lamp strip is provided with a first installation part and a second installation part, the first installation part and the second installation part are arranged in bilateral symmetry about the packaging groove, and the first installation part is inserted into a positioning hole arranged on the PCB so as to realize the alignment installation of the LED assembly and the PCB; the positioning groove arranged on the second installation part and the secondary lens is connected in an inserting mode, and the LED assembly and the secondary lens are installed in an aligning mode. Through the counterpoint connection structure, the central axis that can make the LED subassembly coincides with secondary lens's the central axis, has improved the counterpoint precision and the connection stability of LED subassembly and secondary lens, and simultaneously, the last stabilizer blade that is provided with of secondary lens, the stabilizer blade is used for being connected with the PCB board, has further improved the structural strength of LED lamp strip, makes the anti push-pull force's of LED subassembly and secondary lens performance reinforcing, reduces the collision risk of dropping to the production yield of product and the quality of product have been promoted.

Description

LED lamp strip

Technical Field

The utility model relates to a LED technical field especially relates to a LED lamp strip.

Background

The direct-type backlight module is a light source that is emitted from a spontaneous light source (such as a lamp tube, an LED, etc.) upward and uniformly dispersed by a diffusion plate. Because the LED belongs to a lambertian light source, the light intensity vertically above the light emitting surface of the LED is greater than the light intensity in the oblique angle direction, so that the direct type backlight module mainly homogenizes the light emitted by the LED by means of a secondary LENS (LENS) to reduce the light intensity directly above the center of the LED and enlarge the spot area to realize uniform display.

As shown in fig. 1, the secondary lens 3 ' is designed by aligning the central axis of the LED2 ' with the central axis of the lens to perform optical simulation and lens opening, so that the requirements on the precision of the secondary lens 3 ' and the patch precision of the secondary lens 3 ' and the LED2 ' are high. However, for some current products, the precision of the current SMT labeling machine is difficult to achieve the required tolerance dimension, and therefore, the misalignment between the central axis of the LED2 'and the central axis of the secondary lens 3' is often caused. This condition will cause the light that LED2 ' sent out to distribute after the secondary lens 3 ' takes place serious deformation, the off normal and bright group dark group of facula appear, lead to the emergent light homogeneity to reduce seriously to influence backlight unit's subjective effect.

In addition, in the production and transportation process, the LED2 ' or the secondary lens 3 ' is easily separated from the PCB 1 ' due to external force and impact on the LED2 ' light bar, and therefore, the reliability of the LED2 ' light bar is often tested through a push-pull force experiment of the LED2 ' and the secondary lens 3 '. Namely, the LED2 'and the secondary lens 3' which are pasted with the chips are directly pushed and pulled through an experimental jig. But the experimental process is more complicated and has large limitation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a LED lamp strip can improve the counterpoint precision of LED and secondary lens, strengthens the structural strength of lamp strip simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an LED lamp strip comprises a PCB board, an LED component is arranged on the PCB board, a secondary lens is covered on the LED component,

the PCB is provided with a positioning hole;

the LED assembly comprises a support, an LED chip and packaging materials, wherein a packaging groove is formed in the middle of the support, the LED chip is arranged in the packaging groove, the packaging materials are filled in the packaging groove, a first mounting part and a second mounting part are respectively arranged at two opposite ends of the support, which are bilaterally symmetrical relative to the packaging groove, the first mounting part and the second mounting part are respectively positioned at the upper side and the lower side of the support, and the first mounting part is inserted into the positioning hole;

the lower surface of secondary lens corresponds the second installation department is provided with the constant head tank, the second installation department with the constant head tank is pegged graft, the secondary lens lower part is provided with the stabilizer blade, the stabilizer blade with the PCB board is connected.

As a preferable technical solution of the LED light bar, the first mounting portions on the left and right sides of the packaging groove have different widths, and the second mounting portions on the left and right sides of the packaging groove have different widths.

As the preferable technical scheme of the LED lamp strip, the support legs are connected with the PCB in an adhesive mode.

As the preferable technical scheme of the LED lamp strip, UV glue or thermosetting glue is arranged between the support legs and the PCB.

As the preferable technical scheme of the LED lamp strip, the supporting legs are arranged in a plurality and are uniformly distributed along the circumference of the central axis of the secondary lens.

As the preferable technical scheme of the LED lamp strip, the PCB is coated with the reflective ink layer.

As the preferable technical scheme of the LED lamp strip, the PCB is made of FR4, CM3, ceramic or MCPCB.

As a preferable technical scheme of the LED lamp strip, the bracket is made of PPA, PCT, EMC, SMC or ceramic.

As a preferable technical solution of the LED light bar, the secondary lens is a refractive lens or a reflective lens.

As a preferable technical solution of the LED light bar, the secondary lens is made of PMMA, PC, PS or glass.

The beneficial effects of the utility model reside in that:

the utility model provides a LED lamp strip, a first installation part and a second installation part are arranged on a bracket of an LED component, the first installation part and the second installation part are arranged symmetrically left and right about an encapsulation groove, the first installation part is spliced with a positioning hole arranged on a PCB board, and the alignment installation of the LED component and the PCB board is realized; the positioning groove arranged on the second installation part and the secondary lens is connected in an inserting mode, and the LED assembly and the secondary lens are installed in an aligning mode. Through the counterpoint connection structure, the central axis that can make the LED subassembly coincides with secondary lens's the central axis, has improved the counterpoint precision and the connection stability of LED subassembly and secondary lens, and simultaneously, the last stabilizer blade that is provided with of secondary lens, the stabilizer blade is used for being connected with the PCB board, has further improved the structural strength of LED lamp strip, makes the anti push-pull force's of LED subassembly and secondary lens performance reinforcing, reduces the collision risk of dropping to the production yield of product and the quality of product have been promoted.

Drawings

Fig. 1 is a schematic diagram illustrating alignment of LEDs and secondary lenses of an LED light bar in the prior art;

fig. 2 is a schematic diagram illustrating alignment of an LED assembly and a secondary lens of an LED light bar according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an LED light bar according to an embodiment of the present invention;

fig. 4 is an exploded view of an LED light bar according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a PCB board according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an LED assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of the LED assembly after the removal of the encapsulant according to the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a secondary lens according to an embodiment of the present invention.

The figures are labeled as follows:

1' -a PCB board; 2' -LED; a 3' -secondary lens;

1-a PCB board; 11-a positioning hole; 12-an electrode pad;

2-an LED assembly; 21-a scaffold; 211-packaging slots; 22-LED chip; 23-encapsulating material; 24-a first mounting portion; 25-a second mounting portion;

3-a secondary lens; 31-a positioning groove; 32-legs; 33-light incident surface; 34-the light-emitting surface.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides an LED lamp strip, which can be used in the field of LED liquid crystal backlight modules and also can be used in the field of LED illumination, and the LED lamp strip can provide a uniform light-emitting effect.

As shown in fig. 2 to 8, the LED light bar provided by this embodiment includes a PCB board 1, an LED assembly 2 is disposed on the PCB board 1, and a secondary lens 3 is disposed on the LED assembly 2. Specifically, as shown in fig. 3 to 5, the PCB board 1 is a long bar shape, and a plurality of LED assemblies 2 are disposed on the PCB board 1 along a length direction. The PCB board 1 is provided with a positioning hole 11 for installing the LED component 2. As shown in fig. 6 and 7, the LED assembly 2 includes a support 21, an LED chip 22 and an encapsulation material 23, wherein an encapsulation groove 211 is disposed in the middle of the support 21, the LED chip 22 is disposed in the encapsulation groove 211, the encapsulation material 23 is filled in the encapsulation groove 211, and the encapsulation material 23 may be a silica gel mixed with phosphor. The support 21 is provided with a first mounting portion 24 and a second mounting portion 25 at two opposite ends which are bilaterally symmetrical relative to the packaging groove 211, the first mounting portion 24 and the second mounting portion 25 are respectively located at the upper side and the lower side of the support 21, and the first mounting portion 24 is inserted into the positioning hole 11 so as to mount the LED assembly 2 on the PCB 1. As shown in fig. 8, the lower surface of the secondary lens 3 is provided with a positioning groove 31 corresponding to the second mounting portion 25, and the second mounting portion 25 is inserted into the positioning groove 31 to assemble the secondary lens 3 and the LED module 2 in place. The lower portion of the secondary lens 3 is further provided with a leg 32, and the leg 32 is used for connecting with the PCB board 1 to fix the secondary lens 3 to the upper surface of the PCB board 1.

In the LED light bar provided by the embodiment, the bracket 21 of the LED component 2 is provided with the first mounting portion 24 and the second mounting portion 25, and the first mounting portion 24 and the second mounting portion 25 are symmetrically arranged left and right with respect to the packaging groove 211, wherein the first mounting portion 24 is inserted into the positioning hole 11 formed in the PCB 1, so that the LED component 2 and the PCB 1 are installed in an aligned manner; the second mounting part 25 is inserted into the positioning groove 31 formed in the secondary lens 3, so that the LED assembly 2 and the secondary lens 3 are mounted in an aligned mode. Through the arrangement, the central axis of the LED component 2 can coincide with the central axis of the secondary lens 3, and the alignment precision and the connection stability of the LED component 2 and the secondary lens 3 are improved. Meanwhile, the support legs 32 are arranged on the secondary lens 3 and are used for being connected with the PCB board 1, so that the structural strength of the LED lamp strip is further improved, the push-pull force resistance performance of the LED assembly 2 and the secondary lens 3 is enhanced, the collision and falling risks are reduced, and the production yield of products and the quality of the products are improved.

Specifically, the LED chip 22 is fixed in the package slot 211, and an electrode is disposed at the bottom of the package slot 211, the electrode corresponds to the exposed electrode pad 12 on the PCB board 1, and the electrode is electrically connected to the electrode pad 12. For example, the electrical connection may be made by solder or by metal conductive alloy wires. When the LED light bar operates, the light generated by the LED chip 22 excites the encapsulant 23, and the multiple colors of light are mixed to form white light. Alternatively, the cross-sectional shape of the package slot 211 may be a polygon such as a rectangle, a triangle, etc., or may be a circle or an ellipse. The LED chip 22 may be attached to the bottom surface of the package recess 211 by glue, wherein the glue may be die attach glue.

In the present embodiment, the first mounting portion 24 and the second mounting portion 25 are both rectangular in cross section, and accordingly, the positioning hole 11 on the PCB board 1 and the positioning groove 31 on the secondary lens 3 are also rectangular. In another embodiment, the above structure is not limited to a rectangle, and may be in other shapes, such as a circle, a hexagon, etc., as long as the alignment insertion mounting can be realized.

Furthermore, in order to distinguish the positive electrode and the negative electrode and realize fool-proof assembly, the widths of the first mounting portions 24 on the left side and the right side of the packaging groove 211 are different, and the widths of the second mounting portions 25 on the left side and the right side of the packaging groove 211 are different, that is, the first mounting portions 24 and the second mounting portions 25 respectively comprise two mounting portions with symmetrical positions and asymmetrical sizes, correspondingly, the sizes of the positioning holes 11 on the left side and the right side are matched with the size of the first mounting portions 24, and the sizes of the positioning grooves 31 on the left side and the right side are matched with the size of the.

For ease of processing, in the embodiment, the first and second mounting

portions

24, 25 are each integrally formed with the bracket.

In the present embodiment, as shown in fig. 3, the secondary lens 3 includes two curved surfaces, i.e., a light incident surface 33 and a light emitting surface 34, the light incident surface 33 is located right above the light emitting surface of the LED chip 22, and the central axis of the LED chip 22 coincides with the central axis of the light incident surface 33 and the central axis of the light emitting surface 34. The legs 32 of the secondary lens 3 are fixed to the PCB board 1 by gluing. Alternatively, the legs 32 and the PCB board 1 are fixed together by UV glue or thermosetting glue.

In order to improve the connection stability, the supporting legs 32 are provided in plurality and are uniformly arranged along the circumference of the central axis of the secondary lens 3. The present embodiment preferably has three legs 32.

In the present embodiment, the material of the PCB 1 may be hard material such as FR4, CM3, ceramic, MCPCB, or the like. The upper surface of the PCB board 1 is provided with a circuit copper layer, the positions of the electrode pads 12 and the positions corresponding to the support feet 32 of the secondary lens 3 are removed, and the other parts are coated with a white reflecting ink layer.

The material of the bracket 21 may be a hard material such as PPA, PCT, EMC, SMC, or ceramic. The support 21 is preferably white and has a certain reflectivity to improve the efficiency of light energy utilization.

The material of the secondary lens 3 may be PMMA, PC, PS, glass, or the like. Alternatively, the secondary lens 3 may be a refractive lens or a reflective lens. In the present embodiment, the refractive secondary lens 3 with a rotationally symmetric structure is taken as an example for description, and the secondary lens 3 with a non-rotationally symmetric structure is similar to the above, and will not be described herein again.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. An LED lamp strip comprises a PCB (1), an LED component (2) is arranged on the PCB (1), a secondary lens (3) is covered on the LED component (2), and the LED lamp strip is characterized in that,

the PCB (1) is provided with a positioning hole (11);

the LED assembly (2) comprises a support (21), an LED chip (22) and packaging materials (23), a packaging groove (211) is formed in the middle of the support (21), the LED chip (22) is arranged in the packaging groove (211), the packaging materials (23) are filled in the packaging groove (211), first installation parts (24) and second installation parts (25) are arranged at two opposite ends of the support (21) which are bilaterally symmetrical relative to the packaging groove (211), the first installation parts (24) and the second installation parts (25) are respectively located at the upper side and the lower side of the support (21), and the first installation parts (24) are inserted into the positioning holes (11);

the lower surface of secondary lens (3) corresponds second installation department (25) is provided with constant head tank (31), second installation department (25) with constant head tank (31) are pegged graft, secondary lens (3) lower part is provided with stabilizer blade (32), stabilizer blade (32) with PCB board (1) is connected.

2. The LED light bar of claim 1, wherein the first mounting portions (24) on the left and right sides of the packaging groove (211) have different widths, and the second mounting portions (25) on the left and right sides of the packaging groove (211) have different widths.

3. The LED light bar of claim 1, wherein the legs (32) are glued to the PCB board (1).

4. The LED light bar according to claim 3, characterized in that UV glue or thermosetting glue is arranged between the support legs (32) and the PCB (1).

5. The LED lamp strip according to claim 1, wherein the support legs (32) are provided in plurality and are uniformly distributed along the circumference of the central axis of the secondary lens (3).

6. The LED light bar according to claim 1, wherein the PCB board (1) is coated with a reflective ink layer.

7. The LED light bar as claimed in claim 1, wherein the PCB board (1) is made of FR4, CM3, ceramic or MCPCB.

8. The LED light bar of claim 1, wherein the bracket (21) is made of PPA, PCT, EMC, SMC or ceramic.

9. The LED light bar of claim 1, wherein the secondary lens (3) is a refractive lens or a reflective lens.

10. The LED light bar of claim 1, wherein the secondary lens (3) is made of PMMA, PC, PS or glass.