CN215061876U - Direct type panel lamp with uniform light emission - Google Patents

Abstract

The application discloses luminous even straight following formula panel light, including the frame, fix backplate and diffuser plate on the frame, and fix LED lamp strip on the backplate, the backplate is provided with the installation towards the surface of diffuser plate the rectangle region of LED lamp strip, LED lamp strip divide into two sets ofly, and wherein the quantity of first group LED lamp strip is four, and four LED lamp strip end to end form the rectangle frame, and with the interval at the regional border of rectangle is the same, and the second group LED lamp strip arranges side by side, and with one of them side of rectangle frame is parallel. The application is through forming the rectangle frame with first LED lamp strip end to end, second group LED lamp strip with one of them side parallel arrangement of rectangle frame to arrange first LED lamp pearl in the panel light and second LED lamp pearl in turn, solved the panel light and appeared the problem that the subregion is darker, improved holistic degree of consistency.

Description

Direct type panel lamp with uniform light emission

Technical Field

The application relates to a panel light field especially relates to a luminous even 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, and the diffusion plate is installed on the front face of the frame. The back plate is provided with a cavity, the cavity comprises a flat bottom wall and an inclined side wall, each light bar is fixed on the bottom wall, and the driving power supply is installed on one side of the backlight of the panel light. The lamp strip forms an even plane luminous effect behind the diffuser plate of high luminousness, and drive power supply is used for driving the lamp strip.

In order to adjust the luminescence of panel light, different colours or luminance can be chooseed for use to the lamp strip, and a plurality of lamp strip subassemblies are the bar structure and arrange in parallel, can cause the luminance in the middle of the panel light to be higher than luminance all around, lead to the degree of consistency of whole panel light lower, influence visual effect.

SUMMERY OF THE UTILITY MODEL

The application provides a luminous even straight following formula panel light, and it is lower to have solved the degree of consistency of panel light, influences visual effect's problem.

The application provides a luminous even straight following formula panel light, including the frame, fix backplate and diffuser plate on the frame, and fix LED lamp strip on the backplate, the backplate is provided with the installation towards the surface of diffuser plate the rectangle region of LED lamp strip, LED lamp strip divide into two sets ofly, and wherein the quantity of first group LED lamp strip is four, and four LED lamp strips end to end form the rectangle frame, and with the interval at the regional border of rectangle is the same, and the second group LED lamp strip arranges side by side, and with one of them side of rectangle frame is parallel.

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, a single LED light bar includes a substrate and a plurality of LED light beads mounted on the substrate, the LED light beads are arranged at intervals, and the intervals are equal.

Optionally, the intervals between the second group of LED light bars are the same.

Optionally, the ratio of the distance between the LED lamp beads to the distance between the second group of LED lamp strips is 1: 4-6.

Optionally, the ratio of the distance between the LED lamp beads to the distance between the edges of the rectangular area is 1: 1.5-2.5.

Optionally, the substrate includes a metal layer, an insulating layer, and a circuit layer, and the LED lamp bead is welded on the circuit layer.

Optionally, for the same light bar, the LED lamp beads include a plurality of first LED lamp beads and a plurality of second LED lamp beads, the first LED lamp beads and the second LED lamp beads are alternately arranged, and the brightness or color temperature of the first LED lamp beads and the color temperature of the second LED lamp beads are different.

Optionally, in the second group of LED light bars, a first LED light bead and a second LED light bead of two adjacent light bars correspond in position;

in the first group of LED lamp strips and the second group of LED lamp strips, the first LED lamp beads and the second LED lamp beads of the two adjacent and parallel lamp strips correspond to each other in position.

Optionally, the backplate has the sunken of matrix distribution, the LED module sets up between two rows of sunken.

Optionally, 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.

This application is through forming the rectangle frame with first LED lamp strip end to end, second group LED lamp strip with one of them side parallel arrangement of rectangle frame to arrange first LED lamp pearl in the panel light and second LED lamp pearl in turn, solved the panel light and appeared the problem that the subregion is darker, improved holistic degree of consistency.

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 diagram of an arrangement of LED light bars in the prior art;

fig. 4 is a schematic arrangement diagram of LED light bars in the present application;

FIG. 5 is a schematic structural view of an LED lamp bead and a lens in the present application;

FIG. 6 is a schematic diagram of a circuit board according to the present application;

FIG. 7 is a partial structural view of the frame strip of FIG. 1 with one side omitted;

FIG. 8 is a schematic view of the frame strip of FIG. 7;

fig. 9 is a schematic structural diagram of the back plate in fig. 1.

The reference numerals in the figures are illustrated as follows:

100. a direct type panel lamp;

10. an LED light bar; 101. a first set of LED light bars; 102. a second group of LED light bars; 11. a substrate; 111. a metal layer; 112. an insulating layer; 113. a circuit layer; 12. LED lamp beads; 121. a first LED lamp bead; 122. a second LED lamp bead; 13. a lens; 131. a convex foot;

20. a back plate; 21. a rectangular area; 22. a central region; 23. a bottom wall; 24. a side wall; 25. a rib is protruded; 26. a protrusion; 28. a cavity; 29. an edge region;

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;

60. 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.

Among the present straight following formula panel light, as shown in fig. 3, the LED lamp strip is the stripe structure and arranges in parallel, in order to be able to adjust the luminous intensity of panel light, and LED lamp pearl adopts the LED lamp pearl of two kinds of different luminance or colour temperature, is first LED lamp pearl 121 and second LED lamp pearl 122 respectively, and LED lamp pearl is the matrix distribution in backplate 20 inboard for light source evenly distributed.

Because each LED lamp strip is the strip structure and arranges in parallel, when first LED lamp pearl 121 during operation, as shown in regional A, regional B and regional C in fig. 3, the distance of first LED lamp pearl 121 distance panel edge in regional B is greater than regional A, and has more first LED lamp pearl 121 in regional C, so the luminance of three is: the area C > the area a > the area B, thereby causing a problem of non-uniform light emission of the direct type panel lamp 100.

In order to solve the above problem, as shown in fig. 1 to 2 and fig. 4 to 9, the present application provides a direct type panel lamp 100 with uniform light emission, including a frame 40, a back plate 20 and a diffusion plate 30 fixed on the frame 40, and LED light bars 10 fixed on the back plate 20, the back plate 20 is installed on the back surface of the frame 40, the diffusion plate 30 is installed on the front surface of the frame 40, a light emitting assembly is disposed between the back plate 20 and the diffusion plate 30, a rectangular area 21 for installing the LED light bars 10 is disposed on the surface of the back plate 20 facing the diffusion plate 30, the LED light bars 10 are divided into two groups, wherein the number of the first group of LED light bars 101 is four, the four LED light bars 10 are connected end to form a rectangular frame, and are the same as the interval at the edge of the rectangular area 21, and the second group of LED light bars 102 are arranged side by side and are parallel to one side of the rectangular frame.

This application is through forming the rectangle frame with first group LED lamp strip 101 end to end, and second group LED lamp strip 102 has improved the degree of consistency of whole luminous region with one of them side parallel arrangement of rectangle frame, avoids appearing the regional darker problem of part, and makes the degree of consistency reach more than 90%.

In this embodiment, a single LED light bar 10 includes a substrate 11 and a plurality of LED light beads 12 mounted on the substrate 11, and for the LED light bar 10 to emit light uniformly when in operation, the LED light beads 12 are arranged at intervals and the intervals are equal.

The LED 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.

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 may be fixed to the lower surface of the back plate 20 by screws, preferably by thermal adhesive bonding.

The central area of the housing 20 is bulged to form a cavity 28 for accommodating the LED light bars 10, the cavity 28 includes a flat bottom wall 23 and inclined side walls 24, each LED light bar 10 is fixed on the bottom wall 23, and a diffusion plate 30 is disposed opposite to the housing 20 to close the cavity 28.

As shown in fig. 5 to 6, in an embodiment, the substrate 11 includes a metal layer 111, an insulating layer 112, and a circuit layer 113, and the LED lamp bead 12 is soldered on the circuit layer 113. A bonding pad for bonding the LED lamp bead 12 is usually disposed on the circuit layer 113. In order to provide protection for the circuit layer 113, the surface of the substrate 11 is coated with white solder resist ink to form a solder resist layer, and a window is left at the pad to expose the pad for soldering the LED lamp bead 12.

The lens 13 on the lamp strip is mainly used for light diffusion, the lens 13 is fixed on the substrate 11 through epoxy glue or UV glue, in order to facilitate 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.

As shown in fig. 4, in order to reduce the light intensity of the middle area C of the direct type panel lamp 100, the intervals between the second group of LED light bars 102 are the same, and the ratio of the interval between the LED light beads 12 to the interval between the second group of LED light bars 102 is 1: 4-6. Meanwhile, in order to increase the light emitting intensity of the edge of the panel, the ratio of the distance between the LED lamp beads 12 to the distance between the edges of the rectangular area 21 is 1: 1.5-2.5.

In order to adjust the light emitting intensity of the panel light, in an embodiment, for the same light bar, the LED lamp beads 12 include a plurality of first LED lamp beads 121 and a plurality of second LED lamp beads 122, the first LED lamp beads 121 and the second LED lamp beads 122 are alternately arranged, and the brightness or the color temperature of the first LED lamp beads 121 and the color temperature of the second LED lamp beads 122 are different. In this embodiment, the first LED lamp bead 121 is a 3000K warm white lamp bead, and the second LED lamp bead 122 is a 6500K normal white lamp bead. Of course, the LED lamp beads 12 can be selected differently according to actual requirements.

In one embodiment, in the second group of LED light bars 102, the first LED light bead 121 and the second LED light bead 122 of two adjacent light bars correspond in position;

in the first group of LED light bars 101 and the second group of LED light bars 102, the first LED beads 121 and the second LED beads 122 of the two adjacent and parallel light bars correspond in position.

In one embodiment, the frame 40 is formed by splicing a plurality of (usually four) frame strips 41, and each frame strip 41 is connected to the corresponding edges of the diffuser plate 30 and the back plate 20.

In some embodiments, the strips of the rim 40 are made of metal section (e.g., aluminum alloy), and the ends of adjacent strips of the rim 40 are welded. Of course, 40 frames can also be made of a polymer material by injection molding, and since the polymer material cannot be welded, corner pieces for connecting 40 adjacent frames are generally required to be arranged at corners of the frames 40, or the 40 adjacent frames are connected by lap joints, but the flatness of the frames 40 is poor compared with the welding process.

In some embodiments, as shown in fig. 7 and 8, the cross section of the frame 40 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 mounting structure of the edge of the back plate 20, so as to achieve decoration and certain protection.

In some embodiments, to increase the strength of the profile, the thickness of the inner side of the corner of the frame 40 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 region 29 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 one embodiment, to facilitate the placement of the LED light strips 10, the back plate 20 has a matrix of recesses, and the LED light strips 10 are disposed between two rows of recesses. In order to facilitate the processing of the recess on the back plate 20, the back plate 20 is stamped to form a plurality of protrusions 26 facing away from the cavity 28, the recess is formed between adjacent protrusions 26, each LED light bar 10 is generally arranged in parallel, therefore, the protrusions 26 should also be arranged in parallel, and the gap between adjacent protrusions 26 is used for mounting the light bar, so that the light bar is generally in a straight strip structure.

From a manufacturing and heat dissipation perspective, the backplate 20 is stamped from sheet metal (e.g., ST13) to form a domed, cage-like structure that includes a central region 22 (e.g., bottom wall 23) and an edge region 29 (e.g., side wall 24) disposed peripherally to the central region 22. The edge region 29 overlaps the bezel 40, and the LED light bar 10 is disposed on the lower surface of the central region 22.

The edge region 29 of the back plate 20 is deformed by itself to form the rib 25 extending along the side length direction of the back plate 20, so as to increase the structural strength of the edge region 29, and in some embodiments, in order to reduce the processing difficulty of the rib 25, the edge region 29 is bent by itself to form the rib 25. The deformation is carried out by conventional processing methods such as mechanical punching.

The rib 25 abuts against the edge of the diffuser plate 30 to make the diffuser plate abut against the first mounting surface 42, and because the back plate 20 has a certain elasticity, when the rib 25 abuts against the diffuser plate 30 tightly, the rib 25 can be elastically deformed, so that the rib 25 applies pressure to the diffuser plate 30, the rib 25 and the first mounting surface 42 cooperate with each other to clamp the edge of the diffuser plate 30, so as to prevent the edge of the diffuser plate 30 from being bent, and thus prevent the central portion of the diffuser plate 30 (the geometric center of the diffuser plate 30 or the geometric center close to the diffuser plate 30) from collapsing downwards.

In some embodiments, the bottom wall 23 and the diffuser plate 30 are disposed in parallel, the light bar is fixed on the bottom wall 23, and the side wall 24 is engaged between the rib 25 and the bottom wall 23. In some embodiments, the portion of the edge region 29 overlapping the bezel 40 is parallel to the bottom wall 23, and the bottom wall 23 is higher than the edge region 29. When the direct type panel lamp 100 is installed on a ceiling, the bottom wall 23 is horizontally disposed, and the portion of the corresponding edge area 29 overlapping the frame 40 is also horizontally disposed.

In some embodiments, the edge region 29 of the back plate 20 is fixed to the frame 40 by fastening screws, and the frame 40 is provided with screw grooves 471 arranged along the length direction thereof. In some embodiments, the horizontal portion 44 has a vertical fold 47 in the middle of its upper surface, the gap between the vertical fold 47 and the step structure forms the screw slot 471, and the top surface of the vertical fold 47 supports the edge region 29.

In order to enable the direct type panel light 100 to work normally, in one embodiment, as shown in fig. 1, a driving module is disposed on the direct type panel light 100, and the light bar is electrically connected to the driving module through a wire. In order to facilitate fixing and protecting the driving module, in the present embodiment, the direct type panel lamp 100 further includes a driving cassette 60, and the driving module is mounted in the driving cassette 60, thereby facilitating fixing and protecting the driving module, and simultaneously simplifying the steps of repairing or replacing the driving module, thereby reducing the expenditure of time and labor costs.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within 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-mentioned embodiments 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 (10)

1. Luminous even straight following formula panel light, including the frame, fix backplate and diffuser plate on the frame, and fix LED lamp strip on the backplate, the backplate is provided with the installation towards the surface of diffuser plate the rectangle region of LED lamp strip, its characterized in that, LED lamp strip divide into two sets ofly, and wherein the quantity of first group LED lamp strip is four, and four LED lamp strips end to end form the rectangle frame, and with the interval on the regional border of rectangle is the same, and the second group LED lamp strip arranges side by side, and with one of them side of rectangle frame is parallel.

2. The direct type panel lamp according to claim 1, wherein the single LED lamp strip comprises a substrate and a plurality of LED lamp beads mounted on the substrate, the LED lamp beads are arranged at intervals, and the intervals are equal.

3. The direct type panel lamp according to claim 2, wherein the second set of LED light bars are equally spaced.

4. The direct type panel lamp as claimed in claim 3, wherein the ratio of the spacing between the LED lamp beads to the spacing between the second group of LED lamp strips is 1: 4-6.

5. The direct type panel lamp according to claim 4, wherein the ratio of the distance between the LED beads to the distance between the edges of the rectangular area is 1: 1.5-2.5.

6. The direct type panel lamp according to claim 2, wherein the substrate comprises a metal layer, an insulating layer and a circuit layer, and the LED beads are welded on the circuit layer.

7. The direct type panel lamp of claim 6, wherein the LED lamp beads include a plurality of first LED lamp beads and a plurality of second LED lamp beads for the same lamp strip, the first LED lamp beads and the second LED lamp beads are alternately arranged, and the first LED lamp beads and the second LED lamp beads have different brightness or color temperature.

8. The direct type panel lamp of claim 7, wherein in the second group of LED light bars, a first LED light bead and a second LED light bead of two adjacent light bars are corresponding in position;

in the first group of LED lamp strips and the second group of LED lamp strips, the first LED lamp beads and the second LED lamp beads of the two adjacent and parallel lamp strips correspond to each other in position.

9. The direct type panel light as claimed in claim 1, wherein the back plate has a matrix distribution of recesses, and the LED light bars are disposed between two rows of recesses.

10. The direct type panel lamp according to claim 1, wherein the frame is formed by splicing a plurality of frame strips, each of the frame strips being connected to the diffuser plate and the corresponding edge of the back plate.

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