CN216113937U

CN216113937U - Direct type panel lamp

Info

Publication number: CN216113937U
Application number: CN202121479504.8U
Authority: CN
Inventors: 谢佳伟; 杭泽钢; 蒲纪忠; 甘彩英; 赵艺佼
Original assignee: CH Lighting Technology Co Ltd
Current assignee: CH Lighting Technology Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-03-22
Anticipated expiration: 2031-06-30

Abstract

The application discloses a direct type panel lamp capable of emitting light uniformly, which comprises a frame, a diffusion plate, a back plate, conductive strips and at least one light bar; the single lamp strip comprises a substrate and a plurality of LED lamp beads arranged on the substrate, and each substrate is provided with a first bonding pad; all the light bars are connected in parallel through the conductive strips, welding holes are formed in the butt joint positions of the conductive strips and the light bars, the conductive strips are provided with second bonding pads, and the second bonding pads are fixed with the first bonding pads through soldering tin passing through the welding holes so as to realize the electric connection of the conductive strips and the light bars; the back plate is raised to form a cavity for accommodating the light bar; the diffusion plate is arranged opposite to the back plate to seal the cavity; the frame is connected with the diffusion plate and the corresponding edge of the back plate; compared with the prior art, the scheme has the advantages that the welding positions of the conductive strips and the base plate are located at the superposition positions of the conductive strips and the base plate when the conductive strips and the base plate are attached together, and the requirements of the conductive strips on the space of the light bar can be reduced.

Description

Direct type panel lamp

Technical Field

The application relates to a panel light field especially relates to a straight following formula panel light.

Background

The LED panel lamp has the advantages of good illumination uniformity, soft and comfortable light, environment-friendly materials, low power consumption and the like, and is a popular indoor lighting lamp at present.

The basic structure of the panel lamp comprises a frame, a back plate, a diffusion plate, a driving power supply and a plurality of lamp strips, wherein the back plate is installed on the back face of the frame, the diffusion plate is installed on the front face of the frame, the lamp strips are arranged between the back plate and the diffusion plate and installed on the lower surface of the back plate, and the driving power supply is installed on one side, back to the lamp body assembly, of the back plate. The lamp strip forms a uniform plane luminous effect after passing through the diffusion plate with high light transmittance, and the driving power supply is used for driving the light-emitting element.

All lamp strips pass through busbar parallel connection, and the connection between lamp strip and the busbar is welded through automatic weld machine. The border of conducting strip has first window, and the position that the lamp strip is close to the conducting strip has the second window equally, and two windows department sets up the pad, and both realize the electricity through the welding and connect.

However, if straight following formula panel light is in order to increase the light efficiency, need increase the quantity of LED lamp pearl on the lamp strip, can lead to the distance between two adjacent LED lamp pearls to sharply reduce like this, can lead to taking place to interfere between pad and the LED lamp pearl.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present application provides a direct type panel lamp, including:

the LED lamp comprises at least one lamp strip, wherein each lamp strip comprises a substrate and a plurality of LED lamp beads arranged on the substrate, the LED lamp beads are sequentially arranged along the length direction of the lamp strip, and each substrate is provided with a first bonding pad;

the bus bar comprises bus bars, wherein all the light bars are connected in parallel through the bus bars, welding holes are formed in the butt joint positions of the bus bars and the light bars, the bus bars are provided with second bonding pads, and the second bonding pads are fixed with the first bonding pads through soldering tin passing through the welding holes so as to realize the electric connection of the bus bars and the light bars;

the central area of the back plate is raised to form a cavity for accommodating the light bars, the cavity comprises a flat bottom wall and inclined side walls, and each light bar is fixed on the bottom wall;

the diffusion plate has a light transmission function and is arranged opposite to the back plate to seal the cavity;

the frame is formed by splicing a plurality of frame strips, and each frame strip is connected with the diffusion plate and the corresponding edge of the back plate.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the bonding hole is aligned with the first bonding pad.

Optionally, for the same light bar, the first bonding pad is located between two adjacent LED light beads and is on the same side as each LED light bead;

the second bonding pad is positioned on one side of the conductive strip, which faces away from the first bonding pad.

Optionally, along the length direction of lamp strip, the distance between the LED lamp pearl that is located the both sides of first pad is L1, the width of conducting strip is L2, and satisfies L1: l2 ═ (1.05 to 1.5): 1.

optionally, for the same lamp strip, the number of the first bonding pads is at least two, and the two first bonding pads are arranged along the width direction and/or the length direction of the lamp strip in a staggered manner.

Optionally, the second pads are arranged continuously or at intervals along the circumferential direction of the welding hole.

Optionally, each light bar is strip-shaped and arranged side by side;

the conducting bars are pressed on all the light bars and are perpendicularly intersected with all the light bars.

Optionally, the substrate includes a first metal layer, a first insulating layer, a first circuit layer, and a first solder resist layer, which are sequentially disposed;

the first pad is electrically connected with the first circuit layer, and a first window avoiding the first pad is reserved on the first solder mask layer.

Optionally, the conductive strip includes a second insulating layer, a second circuit layer, and a second solder resist layer, which are sequentially arranged;

the second pad is electrically connected with the second circuit layer, and a second window for avoiding the second pad is reserved on the second solder mask layer.

Optionally, the surface of the substrate and/or the surface of the conductive strip are coated with solder resist ink.

The conducting bar in this application is located the conducting bar and the coincidence department when the base plate pastes each other and leans on together with the base plate in the welding department of base plate, can reduce the conducting bar to the requirement in lamp strip space.

Drawings

Fig. 1 is a schematic structural diagram of a direct type panel lamp according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of the direct type panel lamp of FIG. 1;

fig. 3 is a schematic structural view of the conductive bars and the light bars in fig. 2;

FIG. 4 is a schematic view of the structure of the light bar shown in FIG. 3;

FIG. 5 is a schematic diagram of a conductive strip structure in FIG. 3;

FIG. 6 is a schematic structural view of the LED lamp bead and the lens in FIG. 3;

FIG. 7 is a schematic view of the structure of the substrate shown in FIG. 3;

FIG. 8 is a schematic diagram of a conductive strip structure in FIG. 3;

FIG. 9 is a schematic view of a partial structure of the direct type panel lamp of FIG. 1;

fig. 10 is a schematic view of the frame strip of fig. 9.

The reference numerals in the figures are illustrated as follows:

100. a direct type panel lamp;

10. a light bar; 11. a substrate; 111. a first metal layer; 112. a first insulating layer; 113. a first circuit layer; 12. LED lamp beads; 13. a lens; 131. a convex foot; 14. a conductive strip; 141. a second insulating layer; 142. A second circuit layer; 143. a second solder resist layer; 15. a first pad; 16. a second pad; 17. welding the hole;

20. a back plate; 21. a central region; 211. a bottom wall; 22. an edge region; 221. a side wall; 222. a rib is protruded; 23. a cavity;

30. a diffusion plate;

40. a frame; 41. a frame strip; 42. a first mounting surface; 43. a second mounting surface; 44. a horizontal portion; 45. A vertical portion; 46. thickening the portion; 47. vertically folding; 471. a screw slot;

50. and driving the cartridge.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 10, the present application provides a direct type panel light 100, which includes a frame 40, a back plate 20, a diffusion plate 30, a driving power supply and at least one light bar 10, wherein the back plate 20 is installed on a back surface of the frame 40, the diffusion plate 30 is installed on a front surface of the frame 40, the light bar 10 is disposed between the back plate 20 and the diffusion plate 30 and installed on a lower surface of the back plate 20, and the driving power supply is installed on a back surface of the direct type panel light 100 and electrically connected to the light bar 10 through a power line.

The central area of the back plate 20 is bulged to form a cavity 23 for accommodating the light bars 10, the cavity 23 includes a flat bottom wall 211 and an inclined side wall 221, each light bar 10 is fixed on the bottom wall 211, the diffusion plate 30 is disposed opposite to the back plate 20 to close the cavity 23, the frame 40 is formed by splicing a plurality of (usually four) side frame strips 41, and each side frame strip 41 is connected to the diffusion plate 30 and the corresponding edge of the back plate 20.

The single light bar 10 comprises a substrate 11 and a plurality of LED beads 12 mounted on the substrate 11, and the LED beads 12 are sequentially arranged along the length direction of the light bar 10. The light bar 10 further comprises a lens 13 covering the LED lamp beads 12, the diffusion plate 30 has a light transmission function, light emitted by the LED lamp beads 12 sequentially penetrates through the lens 13 and the diffusion plate 30, and a plurality of LED point light sources form an even area light source after the light is diffused.

In the present embodiment, as shown in fig. 2 to fig. 5, the direct type panel light 100 further includes conductive bars 14, and all the light bars 10 are connected in parallel by the conductive bars 14; each substrate 11 is provided with a first pad 15; the butt joint of the conductive strip 14 and each light bar 10 is provided with a welding hole 17, the conductive strip 14 is provided with a second bonding pad 16, and the second bonding pad 16 is fixed with the first bonding pad 15 through soldering tin passing through the welding hole 17, so as to realize the electrical connection between the conductive strip 14 and the light bar 10.

When the conductive bars 14 are welded to the light bar 10, the conductive bars 14 are attached to the substrate 11 of the light bar 10, the first pads 15 and the second pads 16 are fixed by soldering tin, and the soldering holes 17 can guide the soldering tin to be connected with the first pads 15 and/or the second pads 16.

The welding positions of the conductive strips 14 and the substrate 11 (the welding positions include the first bonding pad 15, the second bonding pad 16 and the welding hole 17) are located at the overlapping positions when the conductive strips 14 and the substrate 11 are attached to each other, so that the requirement of the conductive strips 14 on the space between two adjacent LED lamp beads of the lamp strip 10 can be reduced. When conducting bar 14 and lamp strip 10 welding in this application, reduced the space on the shared lamp strip 10 of conducting bar 14, can be used to the automated welding in little space.

In this embodiment, the bonding hole 17 is aligned with the first pad 15. The first pads 15 are in the area of the soldering holes 17, which facilitates the connection of the solder to the first pads 15 when the solder enters the soldering holes 17. In some embodiments, the second pads 16 are disposed continuously or at intervals along the circumference of the soldering hole 17, which can facilitate the solder connected to the second pads 16 to enter the soldering hole 17.

In some embodiments, for the same light bar 10, the first pad 15 is located between two adjacent LED light beads 12 and is on the same side as each LED light bead 12; the second pad 16 is located on the side of the conductive strip 14 facing away from the first pad 15. When lamp strip 10 and conducting strip 14 were placed and are welded on the tool, conducting strip 14 was located the top of lamp strip 10, and soldering tin is connected the back with second pad 16, and when entering into welding hole 17, soldering tin relied on self gravity to move to first pad 15 department along welding hole 17 to conducting strip 14 and lamp strip 10 welded fastening. In some embodiments, along the length direction of the light bar, the distance between the LED beads 12 on the two sides of the first pad 15 is L1, the width of the conductive strip 14 is L2, and L1 is satisfied: l2 ═ (1.05 to 1.5): 1. preferably, L1: l2 ═ (1.05-1.2): 1.

in some embodiments, for the same light bar 10, the number of the first pads 15 is at least two, and the two first pads 15 are disposed along the width direction and/or the length direction of the light bar in a staggered manner, so as to reduce the space occupied by the first pads 15 in the width direction and/or the length direction of the light bar 10. Referring to one embodiment, the number of the first pads 15 is two for the same light bar 10, and the portion of the conductive strip 14 coinciding with the light bar 10 is substantially rectangular, and the two first pads 15 are located on opposite sides of the rectangle. Similarly, the number of the second pads 16 and the number of the bonding holes 17 are both two, and each of the second pads 16 and each of the bonding holes 17 correspond to two of the first pads 15 one to one.

In some embodiments, as shown in fig. 2, each light bar 10 is in the shape of a strip and arranged side by side; the conductive strips 14 are pressed on all the light bars 10 and perpendicularly intersect with all the light bars 10. Wherein, each lamp strip 10 all is vertical interval arrangement, and the conducting strip 14 all is transversely arranges, and LED lamp pearl 12 is the matrix distribution in backplate 20 inboard for light source evenly distributed.

The substrate 11 may be a metal substrate, preferably an aluminum substrate, or an FR-4 glass fiber board. In some embodiments, the substrate 11 is coated with white solder resist ink to improve light reflection efficiency. The substrate 11 may be fixed to the lower surface of the back plate 20 by screws, preferably by bonding with a thermally conductive adhesive.

As shown in fig. 6 to 8, in some embodiments, the substrate 11 includes a first metal layer 111, a first insulating layer 112, and a first circuit layer 113 sequentially arranged, and the first pad 15 is electrically connected to the first circuit layer 113. In order to provide protection for the first circuit layer 113, the surface of the substrate 11 is coated with white solder resist ink to form a first solder resist layer, and the first solder resist layer leaves a first window avoiding the first pad 15, and the first window can expose the first pad 15.

The lens 13 on the light bar 10 is mainly used for light diffusion, the lens 13 is fixed on the substrate 11 through epoxy glue or UV glue, for convenience of installation, the back of the lens 13 is provided with a convex foot 131, and the corresponding substrate 11 is provided with a positioning hole matched with the convex foot 131. The light spot projected on the diffusion plate 30 after passing through the lens 13 is circular, in order to make the light diffusion uniform, the light spot should be spread over the whole diffusion plate 30, the diameter D of the light spot is not less than the distance between two diagonal LED lamp beads 12, because the intensity of the light spot is large in the middle and small in the edge, the adjacent light spots have partial overlap, so that the light intensity of each position of the diffusion plate 30 is substantially uniform.

The conductive strip 14 is a strip-shaped structure including a second insulating layer 141, a second circuit layer 142, and a second solder resist layer 143, which are arranged in this order, wherein the second insulating layer 141 is made of an insulating resin material. To achieve the connection, the second pad 16 is electrically connected to the second circuit layer 142, the second solder resist layer 143 has a second window 144 that avoids the second pad 16, the second pad 16 is exposed to the second window, and the second insulating layer is made of an insulating resin material. In some embodiments, the surface of the conductive strip is coated with solder resist ink, and the location of the conductive strip 14 also has a light reflecting function.

In the specific configuration of the side frame strip 41, referring to one embodiment, the side frame strip 41 is made of metal section (e.g. aluminum alloy), and the end portions of the adjacent side frame strips 41 are welded and fixed. Of course, the frame strips 41 may also be made of a polymer material by injection molding, and since the polymer material cannot be welded, corner pieces for connecting adjacent frame strips 41 are generally required to be disposed at corners of the frame 40, or the adjacent frame strips 41 are connected by lap joints, but compared with a welding process, the flatness of the frame 40 is poor.

In some embodiments, as shown in fig. 9 and 10, the cross section of the frame strip 41 is an L-shaped structure, and includes a horizontal portion 44 and a vertical portion 45, the edge of the diffuser plate 30 and the edge of the back plate 20 are overlapped on the horizontal portion 44, and the vertical portion 45 encloses a limited space for shielding the installation structure of the edge of the back plate 20, so as to achieve decoration and certain protection.

In order to increase the strength of the sectional material, according to one embodiment, the thickness of the inner side of the corner of the frame strip 41 is increased to form a thickened portion 46, so that a step structure is formed on the horizontal portion 44 to form a first mounting surface 42 and a second mounting surface 43 on the step structure and the horizontal portion 44, the edge of the diffuser plate 30 is overlapped on the lower first mounting surface 42, and the edge of the back plate 20 is overlapped on the upper second mounting surface 43 and is fixed by fastening screws. To save material, in some embodiments, thickened portion 46 is a hollow structure.

In some embodiments, the edge of the back plate 20 is fixed to the frame 40 by fastening screws, and the frame strip 41 is provided with screw grooves 471 arranged along the length direction thereof. In some embodiments, the middle portion of the upper surface of the horizontal portion 44 has a vertical fold 47, the gap between the vertical fold 47 and the step structure forms the screw groove 471, and the top surface of the vertical fold 47 supports the edge of the back plate 20.

From the standpoint of processing and heat dissipation, the backplate 20 is stamped from a sheet metal material (e.g., ST13) to form a domed housing-like structure that includes a central region 21 (e.g., including the bottom wall 211) and an edge region 22 (e.g., including the side walls 221) disposed at the periphery of the central region 21. The edge region 22 overlaps the side frame strip 41, and the light bar 10 is disposed on the lower surface of the central region 21. The side of the backplate 20 within the cavity 23 is coated with a light reflective coating. The light reflecting coating may be various metal paints including epoxy, UV resin, etc.

In some embodiments, the edge region 22 of the back plate 20 is deformed by itself to form a rib 222 extending along the side length direction of the back plate 20, and the rib 222 can increase the supporting strength of the whole back plate 20, especially the structural strength of the edge region 22, and prevent it from pulling the frame 40 and deforming the frame 40, so that the direct type panel light 100 is applied to the keel on the ceiling in a contact manner, and no gap occurs.

In some embodiments, to reduce the difficulty of machining the ribs 222, the edge region 22 is bent upon itself to form the ribs 222. The deformation is carried out by conventional processing methods such as mechanical punching. In order to reduce the weight of the back plate 20 itself, the thickness of the back plate 20 is 0.1mm to 0.4mm in some embodiments while satisfying the supporting strength of the back plate 20. Preferably, the thickness of the back plate 20 is 0.2 mm.

The rib 222 presses against the edge of the diffuser 30 to be close to the first mounting surface 42, because the back plate 20 has a certain elasticity, when the rib 222 presses against the diffuser 30, the rib 222 deforms elastically, so that the rib 222 applies pressure to the diffuser 30, and the rib 222 and the first mounting surface 42 cooperate to clamp the edge of the diffuser 30, so as to prevent the edge of the diffuser 30 from being bent, thereby preventing the center of the diffuser 30 (the geometric center of the diffuser 30 or the geometric center close to the diffuser 30) from collapsing downward.

In this embodiment, the direct type panel lamp 100 further includes a driving cassette 50 installed at the back of the direct type panel lamp 100, and the driving module is installed in the driving cassette 50, thereby facilitating fixing and protecting the driving module, and simultaneously simplifying the maintenance or replacement of the driving module, thereby reducing the expenditure of time and labor cost.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. Direct type panel light, its characterized in that includes:

2. The direct type panel lamp according to claim 1, wherein the soldering hole is aligned with the first pad.

3. The direct type panel lamp according to claim 1 or 2, wherein the first bonding pad is located between two adjacent LED lamp beads and on the same side of each LED lamp bead for the same lamp strip;

4. The direct type panel lamp of claim 3, wherein the distance between the LED beads on the two sides of the first bonding pad along the length direction of the light bar is L1, the width of the conductive strip is L2, and L1 is satisfied: l2 ═ (1.05 to 1.5): 1.

5. the direct type panel lamp according to claim 1, wherein the number of the first pads is at least two for the same lamp strip, and the two first pads are arranged along the width direction and/or the length direction of the lamp strip in a staggered manner.

6. The direct type panel lamp according to claim 1 or 5, wherein the second pads are disposed continuously or at intervals in a circumferential direction of the soldering hole.

7. The direct type panel lamp according to claim 1, wherein each light bar is strip-shaped and arranged side by side;

8. The direct type panel lamp according to claim 1, wherein the substrate comprises a first metal layer, a first insulating layer, a first circuit layer, and a first solder resist layer sequentially arranged;

9. The direct type panel lamp according to claim 1, wherein the conductive strip includes a second insulating layer, a second circuit layer, and a second solder resist layer sequentially arranged;

10. The direct type panel lamp according to claim 1, wherein a surface of the substrate and/or a surface of the conductive strip are coated with solder resist ink.