CN203309712U - LED direct type panel lamp - Google Patents

Abstract

The utility model provides a straight following formula panel lamps and lanterns of LED, include: the LED lamp comprises an LED light source (10), a lens (20), a diffusion plate (30), a lamp body (40) and an optical cavity A, wherein the optical cavity A is composed of the diffusion plate (30) and the lamp body (40), and light emitted from the LED light source (10) passes through the lens (20) and then passes through the optical cavity A formed by the diffusion plate (30) and the lamp body (40) to be transmitted back and forth in the optical cavity A until the light is emitted from the diffusion plate (30).

Description

A LED direct-down panel lamp

technical field

The invention relates to the technical field of illumination, in particular to an LED direct-lit panel lamp.

Background technique

LED (Light Emitting Diode, light-emitting diode) has the advantages of energy saving and environmental protection, and is widely used in various fields of life and production. As such LED lamps with low carbon, energy saving, environmental protection, and long life are more and more favored by the society, how to improve the luminous efficiency and provide a panel lamp with uniform light emission is an urgent problem in the field of lighting technology. one of the problems.

Contents of the invention

The technical solution of the present invention is to provide an LED direct panel lamp, comprising: LED light source (10), lens (20), diffuser plate (30), lamp body (40) and an optical cavity A, the optical cavity A is composed of The diffuser plate (30) and the lamp body (40) are composed, the light emitted from the LED light source (10) passes through the lens (20), and then passes through the optical cavity A formed by the diffuser plate (30) and the lamp body (40), so that The light travels back and forth in the optical cavity A until exiting the diffuser plate (30).

Preferably, the above-mentioned lamp may further include a bracket (50).

Preferably, the above bracket (50) is located in the optical cavity A.

Preferably, the above-mentioned lens (20) is placed on the bracket (50), and the light emitted from the LED light source (10) propagates back and forth between the diffusion plate (30) and the bracket (50) through the lens (20) until Emerge from the diffuser plate (30).

Preferably, the above-mentioned LED light source (10) can form a light source array, and the lens (20) can form a lens array.

Preferably, the above-mentioned lens (20) includes a first incident surface (21), a second incident surface (22), a first reflective surface (23), a second reflective surface (24) and a light-emitting surface (25), the lens ( The first incident surface (21) and the second incident surface (22) of 20) divide the incident light into two parts, and a part of the light passes through the first incident surface (21) via the first reflecting surface (23) and the light emitting surface (25), Then it exits from the diffuser plate (30); another part of the light passes through the second incident surface (22), passes through the second reflective surface (24), and also passes through the first reflective surface (23) and the light exit surface (25), and finally also from the diffused Board (30) exits.

Preferably, a partial area of the above-mentioned first reflective surface (23) is a frosted surface.

Preferably, the above-mentioned first reflective surface (23) is a conical surface, and its cross-sectional view is in an inverted triangle shape.

Preferably, the surface of the bracket (50) can be painted or powdered to form a highly diffuse reflective surface.

Preferably, by adjusting the distance between the bracket (50) and the diffusion plate (30), the light is controlled to achieve uniform emission.

Preferably, some white diffuse reflection printing dots are set on the diffusion plate (30).

Preferably, the above-mentioned LED light source (10) is a 1W~3W high-power packaged LED.

Description of drawings

FIG. 1 is a schematic diagram of an assembly structure of Embodiment 1 of the present invention;

Fig. 2 is a schematic exploded view of the structure of Embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of the lens structure of Embodiment 1 of the present invention;

4 is a schematic diagram of the ideal propagation path of lens light in Embodiment 1 of the present invention;

Fig. 5 is a diagram of the internal light path of the ceiling lamp according to Embodiment 1 of the present invention;

Fig. 6 is a schematic diagram of the bracket structure of Embodiment 1 of the present invention;

Fig. 7 is a diagram of the inner light path of the ceiling lamp according to the second embodiment of the present invention.

Detailed ways

The LED direct panel lighting provided by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of the assembly structure of the first embodiment of the present invention; Fig. 2 is a schematic diagram of the structure explosion of the first embodiment of the invention; Fig. 3 is a schematic diagram of the lens structure of the first embodiment of the invention; Fig. 4 is an ideal propagation path of the lens light of the first embodiment of the invention Schematic diagram; FIG. 6 is a schematic diagram of the bracket structure of the first embodiment of the invention.

Figure 5 and Figure 7 show two preferred embodiments of the present invention, Figure 5 shows Embodiment 1, and Figure 7 shows Embodiment 2.

As shown in FIGS. 1-6 , in Embodiment 1 of the present invention, the LED direct panel lamp mainly includes an LED light source 10 , a lens 20 , a diffusion plate 30 , a lamp body 40 and a bracket 50 . In the scheme, by providing an LED direct panel lamp, the light emitted from the LED light source 10 is irradiated to the surrounding area by using the lens 20, and then passes through the optical cavity formed by the diffusion plate 30 and the bracket 50 similar to the light guide plate. A, the light propagates back and forth in the optical cavity A formed by the diffuser plate 30 and the bracket 50 until it exits the diffuser plate 30 .

Further, in Embodiment 1 of the present invention, the LED light source 10 may form a light source array, and the lens 20 may form a lens array, and the lens array corresponds to the light source array. For each lens unit (as shown in FIG. 3 ), the lens 20 includes a first incident surface 21 , a second incident surface 22 , a first reflecting surface 23 , a second reflecting surface 24 and a light emitting surface 25 . Wherein, the first incident surface 21 and the second incident surface 22 of the lens 20 divide the incident light into two parts, one part of the light passes through the first incident surface 21 and converges into parallel light through the first reflecting surface 23; the other part of the light passes through the second incident light After the surface 22 passes through the second reflective surface 24 , it also passes through the first reflective surface 23 , and becomes parallel light. Thus, through the lens 20, the light propagates in the peripheral direction. The propagation of such light in the lens belongs to the ideal propagation path, as shown in Figure 4.

In the embodiment of the present invention, since the first incident surface 21, the second incident surface 22 and the second reflecting surface 24 of the lens can be designed according to the TIR (Total Internal Reflector) lens (the TIR lens divides the incident light into two paths, one path from A structure similar to a convex lens emits light, and uses total reflection to emit light along the way to improve light output efficiency). The first reflective surface 23 can be a conical surface, which is an inverted triangle viewed from the cross-sectional view of the lens 20, or a free-form surface. In this solution, a certain area of the first reflective surface 23 can be made into a frosted surface to form a semi-transparent and semi-reflective effect (as shown in Figure 4, when we design the lens, most of the light hits the surface 23 , total reflection occurs. But if the surface 23 is made into a matte surface, the total reflection will be destroyed and a part of the light will be transmitted.), so that a small part of light can be emitted, and more light can be guaranteed to be directed to the surrounding area. The light emitted by the LED light source 10 passes through the first incident surface 21 and the second incident surface 22 of the lens 20 to divide the incident light into two parts, and a part of the light passes through the first incident surface 21, passes through the first reflective surface 23 and the light exit surface 25, and then diffuses Plate 30 emerges as shown by rays2. Another part of the light passes through the second incident surface 22, passes through the second reflective surface 24 and also passes through the first reflective surface 23 and the light exit surface 25, and propagates or reflects back and forth in the optical cavity A formed by the bracket 50 and the diffuser plate 30 until It emerges from the diffuser plate 30, as shown by rays1.

Therefore, in the embodiment of the present invention, since the LED light source 10 is a surface light source, and after some areas of the first reflective surface 23 are made into a frosted surface, the light rays do not all belong to the ideal propagation path (parallel from the light-emitting surface 25). exit), but has a divergence angle, as shown in Figure 5. That is, the light emitted from the light emitting surface 25 of the lens 20 propagates or reflects back and forth in the optical cavity A formed by the bracket 50 and the diffuser plate 30 until it exits from the diffuser plate 30 .

In addition, in this solution, the surface of the bracket 50 can be painted or powdered to form a high diffuse reflection surface. And a hole can be made on the bracket (as shown in FIG. 6 ), and the lens 20 can just be put into the above-mentioned hole. In this way, the bracket 50 and the diffusion plate 30 form a sealed optical cavity A similar to a light guide plate. In addition, this solution can also adjust the distance between the bracket 50 and the diffusion plate 30 to control the light to achieve uniform emission.

At the same time, it is also possible to set some white diffuse reflection printing dots on the diffuser plate 30 to control light emission and further obtain a uniform light emission surface.

In the embodiment of the present invention, the LED light source 10 selects a 1W~3W high-power packaged LED, such as Cree's XPG, or an SMT packaged 1W LED, such as AOT 3030. the

In the second embodiment of the present invention, the LED direct panel lamp mainly includes an LED light source 10 , a lens 20 , a diffusion plate 30 and a lamp body 40 . FIG. 7 is a diagram of the inner light path of the ceiling lamp according to Embodiment 2 of the present invention.

In this solution, since the LED light source 101 is a surface light source, and some areas of the reflective surface 23 are frosted, the light does not all belong to the ideal propagation path, but has a divergence angle. That is, the light emitted from the lens 201 propagates or reflects back and forth in the optical cavity A formed by the diffuser plate 301 and the lamp body 401 until it exits from the diffuser plate 301 .

In the embodiment of the present invention, one LED light source 101 corresponds to one lens 201 , that is, the lens array corresponds to the light source array.

The foregoing description of the preferred embodiments of the present invention is for purposes of illustration and description, and is not intended to be exhaustive or limited to the specific forms disclosed. Obviously, many modifications and changes are possible, and these modifications and changes may be obvious to those skilled in the art. obvious, and are intended to be included within the scope of the present invention as defined by the appended claims.

Claims (11)

1. LED straight-down negative panel light fixture, comprise: LED light source (10), lens (20), diffuser plate (30), lamp body (40) and an optics cavity A, it is characterized in that described optics cavity A consists of diffuser plate (30) and lamp body (40), the light sent from LED light source (10), via lens (20), by diffuser plate (30) and the formed optics cavity A of lamp body (40), light is propagated back and forth in optics cavity A, until from diffuser plate (30) outgoing again.

2. light fixture according to claim 1, is characterized in that described light fixture also can comprise a support (50).

3. light fixture according to claim 2, is characterized in that described support (50) is arranged in optics cavity A.

4. light fixture according to claim 2, it is characterized in that, described lens (20) are placed on (50) on support, the light sent from LED light source (10), via lens (20), pass through in the propagation back and forth between (50) on diffuser plate (30) and support, until from diffuser plate (30) outgoing.

5. light fixture according to claim 1, is characterized in that described LED light source (10) can form array of source, and lens (20) can form lens arra.

6. light fixture according to claim 1, it is characterized in that described lens (20) include first plane of incidence (21), second plane of incidence (22), the first reflecting surface (23), the second reflecting surface (24) and exiting surface (25), first plane of incidence (21) and second plane of incidence (22) of lens (20) are divided into two parts by incident light, part light passes through first plane of incidence (21) via the first reflecting surface (23) and exiting surface (25), then from diffuser plate (30) outgoing; Another part light, by second plane of incidence (22), also via the first reflecting surface (23) and exiting surface (25), is finally also gone up outgoing from diffuser plate (30) after the second reflecting surface (24).

7. light fixture according to claim 6, is characterized in that described the first reflecting surface (23) subregion is frosting.

8. light fixture according to claim 6, is characterized in that described the first reflecting surface (23) is taper seat, and its profile is upside-down triangle shape.

9. light fixture according to claim 2, is characterized in that the surperficial available paint of described support (50) or dusting form high diffuse surface.

10. light fixture according to claim 1, is characterized in that on described diffuser plate (30) arranging some white diffuse reflection printing points.

11. light fixture according to claim 1, is characterized in that described LED light source (10) is the high-power packaged LED of 1W～3W.

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