CN103672634B - Modular Panel Light - Google Patents

Abstract

The present invention relates to a modular flat panel light, comprising: at least one flat panel light module; the flat panel light module comprises: a PCB board, a light guide plate adapted for the lower end of the PCB board; the inner circle of the central through hole of the light guide plate is folded upward and arranged adjacent to the annular and evenly distributed LEDs on the PCB board; the light guide plate has a plurality of folded edges distributed symmetrically with respect to the center to achieve the function of multiple redirection of light, projecting light as much as possible out of the light guide plate for illumination, and distributing light in multiple layers, thereby expanding the scattered light area, and making the light softer and more uniform; at the same time, if individual LEDs are damaged, it will not affect the visual effect of the entire light guide plate. The present invention adopts a single-circle or multi-circle light-emitting structure, and the light guide plate can be designed to be square, circular or other shapes. The light guide plate of the present invention is designed to have only reflective paint, and does not require a diffusion point, a reflective plate or film, a diffusion plate, etc., which facilitates assembly and reduces costs. Dust accumulation inside the light guide plate does not affect the lighting effect.

Description

Modular Panel Light

technical field

The invention relates to a lamp, in particular to a modular flat lamp composed of LEDs or other small lamp beads.

Background technique

Existing LED flat panel lights are divided into two types according to the light emitting mode: side-in type and direct-down type LED flat panel lights.

The side-entry LED panel light is mainly composed of a frame bracket, a diffuser plate, a reflector plate, a light guide plate arranged up and down in sequence, a plurality of light bars arranged opposite to the edge of the light guide plate, and a driver. The main function of the light guide plate is to guide the light in the direction of the design. The light guide materials include PS polystyrene, PC polycarbonate, PMMA (polymethyl methacrylate) acrylic materials, etc. The main disadvantages of side-entry flat panel lights are: First, it is not easy to make high energy efficiency, and the larger the area, the harder it is to make. Second, the weight is heavier and the price is higher. The light guide plate is the core of the side-entry flat panel light, and the price is higher than that of the direct type; thirdly, the quality of the light guide plate is high, if the design is not good, There will be phenomena such as bright in the middle and dark on both sides, or bright edges on the light-incoming side, or inconsistent brightness from different angles, which will affect the lighting quality. Fourth, the reliability performance is relatively poor. Because the light guide plate, reflective ink and reflective film are always at a relatively high temperature, they are easy to age and turn yellow, resulting in a decrease in light output and a greatly reduced lamp life. Fifth, the light bars are set opposite to each other, and the utilization rate of the light source is low.

The direct-type LED flat panel light is composed of a frame bracket, a diffuser plate, a driver, and a plane covered with LED particles. The structure of the direct type LED flat panel light is similar to that of the side entry type, except that the light source is evenly distributed behind the diffuser plate. The size is relatively thick, but the efficiency is much higher than the side entry type. The main disadvantage of the direct-type flat panel light is that it cannot be made too thin, and there must be a certain distance between the LED light source and the diffuser plate, otherwise the light will produce bright spots, which will inevitably lead to an increase in the thickness of the light and increase the cost of the light shell. The appearance of the lamp will also look bad. And if the thickness increases, the light transmission path will be increased, which will reduce the energy efficiency of the lamp. Since the lamp beads are fixed on the back panel, if the back panel uses a whole piece of aluminum substrate, the cost will be very high. If a strip-shaped aluminum substrate is used, fixing and positioning are another problem. If a large aluminum plate is used for the back panel of the direct-down flat panel light, problems such as deformation and bending of the back panel after long-term hoisting should also be considered.

Contents of the invention

The technical problem to be solved by the present invention is to provide a modular flat panel light with simple structure, the number of modules can be increased or decreased at will, the replacement is convenient, and the light source utilization rate is high.

In order to solve the above problems, the present invention provides a modular flat panel lamp, Including at least one panel lamp module; the panel lamp module includes: a PCB board, a light guide plate suitable for the lower end of the PCB board; the inner circle of the central through hole of the light guide plate is turned up and connected with the circular and evenly distributed LEDs on the PCB board Arranged adjacently up and down; the light guide plate has multiple folded edges symmetrically distributed in the center to realize the function of multiple turning light guides, that is, to realize a multi-circle light-emitting structure, to emit light as much as possible out of the light guide plate for illumination, and to make the light multi-layered distribution, thereby expanding the area of astigmatism, and the light is softer and more uniform; at the same time, if some LEDs are damaged, the visual effect of the entire light guide plate will not be affected.

As a preferred embodiment, the PCB board is fixed on the bottom of a heat dissipation plate, and the heat dissipation plate is connected to the frame bracket through an insulating member.

As a further preferred embodiment, the part on the PCB board in the central through hole of the light guide plate is also provided with a plurality of LEDs; the central through hole of the light guide plate is provided with an inner ring light guide, and the inner ring light guide The lower end surface of is adapted to cover the central through hole of the light guide plate.

As a further preferred embodiment, a bolt is fixed in the center of the inner ring light guide, and the inner ring light guide is connected to the bottom of the heat dissipation plate through the bolt and thread, and at the same time, the light guide plate is fixed on the bottom of heat sink.

As a further preferred embodiment, the light guide plate is circular or square.

As a further preferred embodiment, there are a plurality of ventilation openings between the heat dissipation plate and the frame bracket, and a plurality of ventilation guide holes are evenly distributed on the heat dissipation plate, that is, a heat dissipation channel is formed, and cold air enters from each ventilation guide hole to exchange heat. Then it is discharged from the above-mentioned vent.

As a further preferred embodiment, a power supply is fixed on the heat dissipation plate, a backboard is provided on the frame support, and the power supply is arranged under the backboard.

As a further preferred embodiment, the top surfaces of the light guide plate and the inner ring light guide body are coated with a reflective coating.

As a further preferred embodiment, the part of the light guide plate away from the central through hole is provided with at least two folded edges.

As a further preferred embodiment, the power supplies in the plurality of adjacent panel light modules are connected in parallel, that is, a corresponding number of power supplies is selected according to the number of modules; the sum of the prices of multiple low-power power supplies is less than that of a single high-power power supply price, so further cost savings can be achieved.

The present invention has positive effect with respect to prior art:

(1) The luminous body of the present invention is designed as a replaceable module, which can be installed, replaced or upgraded without tools;

(2) The present invention adopts the center-to-surround light guide module design and the vertical-to-horizontal light guide design, so that the module can be fixed easily, and the module can be used to realize a flat lamp with any module size;

(3) The flat panel light of the present invention has high safety: the heat dissipation plate is connected to the frame bracket through an insulating part, which realizes the space isolation between the charged body and the accessible shell part, and eliminates various possible electric shock risks;

(4) The heat dissipation effect of the panel lamp of the present invention is excellent: the whole bottom plate dissipates heat, and convection cooling holes are provided, which can easily meet the high-power lighting requirements (for example, a 60*60cm flat lamp can achieve a power of more than 100W);

(5) The invention adopts an ultra-thin structure design, which can have a built-in power supply, and can be installed directly on the ceiling or wall without a ceiling or installation holes, and without installation brackets, which greatly facilitates use;

(6) The panel light of the present invention is easy to maintain, and any part can be easily replaced without tools or professional electrician knowledge;

(7) The present invention adopts a single-circle or multi-circle light-emitting structure, and the light guide plate can be designed in square, circular or other shapes. The light guide plate of the present invention is designed to only have reflective paint, and does not need structures such as diffusion points, reflection plates or films, diffusion plates, etc., which facilitates assembly and reduces costs. Dust accumulation inside the light guide plate does not affect the lighting effect;

(8) The light guide plate has a plurality of folded edges symmetrically distributed in the center to realize the function of turning the light guide multiple times, and the light can be emitted out of the light guide plate for illumination as much as possible, and the light emitted to the end surface of the light guide plate can be reduced as much as possible, which improves the utilization of light High efficiency, and multi-layer distribution of light, thereby expanding the astigmatism area, the light is softer and more uniform; at the same time, if some LEDs are damaged, the visual effect of the entire light guide plate will not be affected;

(9) The flat panel lamp of the present invention adopts a heat dissipation plate with the same size as the light-emitting surface. There are multiple ventilation openings between the heat dissipation plate and the frame bracket, and a plurality of ventilation guide holes are evenly distributed on the heat dissipation plate, which constitutes a heat dissipation channel. The air enters through the ventilation holes and is discharged from the above-mentioned vents after heat exchange, so the heat dissipation effect is good and the heat distribution is even, which solves the heat island problem in the prior art that the side light-guiding panel lamp can only use the frame to dissipate heat.

Description of drawings

In order to clearly illustrate the innovative principle of the present invention and its technical advantages over existing products, a possible embodiment is described below by means of a non-limiting example of the application of said principle with the help of the accompanying drawings. In the picture:

Fig. 1 is the end face structure diagram of the modular flat panel lamp of the present invention, wherein the light guide plate is square;

Fig. 2 is another end face structure diagram of the modular flat panel lamp of the present invention, wherein the light guide plate is circular;

Fig. 3 is a schematic cross-sectional structure diagram of the modular flat panel lamp in Fig. 1 or Fig. 2;

Reference signs: 1: lighting module bracket, 2: bracket screw, 3: LED, 4: PCB board, 5: backplane, 6: heat dissipation plate, 7: power supply, 8: frame bracket, 9: insulating part, 10 : reflective paint, 11: light guide plate, 12: inner ring light guide, 13: bolt, 14: flat light module.

detailed description

Embodiment one

The modular panel lamp of this embodiment includes at least one panel lamp module 14 as shown in FIG. The inner circle of the central through hole is folded upwards and set up and down adjacent to the circular and evenly distributed LED3 on the PCB 4; the light guide plate 11 has a plurality of folded edges symmetrically distributed in the center to realize the function of multiple turning light guides , the light is emitted from the light guide plate as much as possible for illumination, and the light is distributed in multiple layers, that is, a multi-circle light-emitting structure is realized, thereby expanding the astigmatism area, and the light is softer and uniform; at the same time, if there are individual LED damages, it will not affect the entire light guide plate. Visual effects.

The PCB board 4 is fixed on the bottom of a heat dissipation plate 6 , and the heat dissipation plate 6 is connected to the frame support 8 through an insulator 9 . There are a plurality of ventilation openings between the heat dissipation plate 6 and the frame support 8, and a plurality of ventilation guide holes are evenly distributed on the heat dissipation plate.

The part in the central through hole of the light guide plate 11 on the said PCB board 4 is also provided with a plurality of LEDs; The end surface is adapted to cover the central through hole of the light guide plate 11 .

A bolt 13 is fixed in the center of the inner ring light guide body 12, and the inner ring light guide body 12 is screwed to the bottom of the heat dissipation plate 6 through the bolt 13, and at the same time, the light guide plate 11 is fixed on the heat dissipation plate 6. Plate 6 bottom.

A power supply 7 is fixed on the cooling plate 6 , a backboard 5 is arranged on the frame support 8 , and the power supply 7 is arranged under the backboard 5 .

The top surfaces of the light guide plate 11 and the inner ring light guide body 12 are coated with a reflective coating 10 .

The part of the light guide plate 11 away from the central through hole is provided with at least two folded edges.

The power supplies 7 in the plurality of adjacent panel lamp modules 14 are connected in parallel, that is, a corresponding number of power supplies is selected according to the number of modules; since the price sum of multiple low-power power supplies is less than the price of a single high-power power supply, it can be Further cost savings.

Apparently, the above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims (7)

1. A modular panel lamp, characterized in that it comprises at least one panel lamp module; the panel lamp module comprises: a PCB board, a light guide plate suitable for the lower end of the PCB board; the inner ring of the central through hole of the light guide plate is turned upwards and It is set up and down adjacent to the ring-shaped and evenly distributed LEDs on the PCB; the light guide plate has multiple folded edges symmetrically distributed in the center; The PCB board is fixed on the bottom of a heat dissipation plate, and the heat dissipation plate is connected to the frame bracket through an insulating member; The part on the PCB board in the central through hole of the light guide plate is also provided with a plurality of LEDs; the central through hole of the light guide plate is provided with an inner ring light guide, and the lower end surface of the inner ring light guide is suitable for covering the The central through hole of the light guide plate; The light guide plate is circular or square. 2. The modular panel light according to claim 1, wherein a bolt is fixed in the center of the inner ring light guide, and the inner ring light guide is connected to the bottom of the heat sink by the bolt and thread , and at the same time fix the light guide plate on the bottom of the heat dissipation plate. 3 . The modular panel light according to claim 1 , wherein there are a plurality of ventilation openings between the heat dissipation plate and the frame bracket, and a plurality of ventilation guide holes are evenly distributed on the heat dissipation plate. 4 . 4 . The modular panel light according to claim 1 , wherein a power supply is fixed on the heat dissipation plate, a backboard is provided on the frame bracket, and the power supply is arranged under the backboard. 5. The modular flat panel light according to claim 1, characterized in that: the top surfaces of the light guide plate and the inner light guide body are coated with a reflective coating. 6 . The modular flat panel light according to claim 1 , wherein at least two folded edges are provided on the part of the light guide plate away from the central through hole. 7 . 7. The modular panel light according to claim 1, wherein the power supplies in the plurality of adjacent panel light modules are connected in parallel.