CN214948441U

CN214948441U - Side-lighting down lamp

Info

Publication number: CN214948441U
Application number: CN202120772555.3U
Authority: CN
Inventors: 汪旭煌; 李文龙
Original assignee: Ningbo Klite Electric Manufacture Co Ltd
Current assignee: Ningbo Klite Electric Manufacture Co Ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-11-30
Anticipated expiration: 2031-04-15

Abstract

The utility model discloses a luminous down lamp of side, including the casing that is equipped with the installation slotted hole and the LED lamp source of setting in this casing, still include the second optical device of first optical device and light-permeable, first optical device sets up in the installation slotted hole bottom of casing, and the second optical device sets up the top of first optical device forms optical cavity rather than, and the LED lamp source sets up in the optical cavity side, and first optical device includes that specular reflection layer and a plurality of interval set up the diffuse reflection unit on specular reflection layer, and the diffuse reflection unit is along keeping away from LED lamp source direction is intensive gradually. The light that directly once passes through second optical device and the light of first optical device specular reflection and diffuse reflection passes through second optical device again and reflects and refract the mixture in the air bed in the second optical device outside, forms even light-emitting, so this scheme can remove light guide plate part, and reduce cost alleviates lamps and lanterns weight, and light utilization ratio is high simultaneously, and the light-emitting homogeneity is good.

Description

Side-lighting down lamp

Technical Field

The utility model belongs to the technical field of the LED illumination and specifically relates to a luminous down lamp of side is related to.

Background

The light guide plate is an important element in the side-emitting lamp module, is used for transmitting light rays entering the light guide plate from the incident surface, and is used for improving the light ray utilization rate and the light emitting uniformity. In the prior art, the side-emitting lamp is provided with the light guide plate, and the light guide plate has high cost in the whole lamp and heavy weight. For example, a new anti-glare LED tube light disclosed in chinese patent literature, whose publication number CN204345323U, includes an outer cylinder (1), a lamp panel (2), a reflector (4), a light guide plate (6), and a soft light sheet (7); the outer cylinder body is a cylinder body with a back plate; the lamp plate is an annular lamp plate, a plurality of LED lamps (3) are arranged on the lamp plate at equal intervals, and the lamp plate is fixed on the inner wall of the outer cylinder; the light guide plate and the soft light sheet are sequentially stacked and fixed at the front end of the outer cylinder, and the soft light sheet is positioned on the outer side of the light guide plate; the reflecting surface (5) of the reflector is a conical surface; the reflecting surface is positioned between the back plate and the light guide plate; and the reflecting surface faces the light guide plate; the radii of the height and the bottom surface of the cone corresponding to the conical surface are equal; the light emitted by the LED lamp is reflected by the reflecting surface and then sequentially emitted through the light guide plate and the soft light sheet. The novel anti-dazzle LED down lamp is ingenious and compact in structure, good in anti-dazzle effect and easy to implement. However, the light guide plate is adopted, so that the product cost is high and the weight is heavy.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome prior art's above-mentioned problem, provide a luminous down lamp of side. The side-emitting down lamp can remove light guide plate parts, reduce cost, reduce the weight of the lamp, and has high light utilization rate and good light emitting uniformity.

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

the utility model provides a luminous down lamp of side, is including the casing that is equipped with the installation slotted hole and the LED lamp source of setting in this casing, still includes first optical device and light-permeable second optical device, first optical device sets up the installation slotted hole bottom at the casing, the second optical device sets up first optical device's top forms optical cavity rather than it, the LED lamp source sets up in the optical cavity side, first optical device includes that specular reflection layer and a plurality of intervals set up the diffuse reflection unit on specular reflection layer, the diffuse reflection unit is along keeping away from LED lamp source direction is intensive gradually.

In this scheme, adopt first optical device, second optical device to replace the light guide plate, first optical device has reflection and diffuse reflection function, and first optical device can be the structure of the diffuse reflection unit of a plurality of intervals setting on the specular reflection layer, and the diffuse reflection unit is gradually intensive along keeping away from LED lamp source direction, and specular reflection and diffuse reflection function can adopt the light material among the prior art to realize, and the second optical device of light-permeable also can adopt light material. When light emitted by the LED lamp source and facing the first optical device is incident on the first optical device, most of the light is reflected to the second optical device through the mirror surface, and a small part of the light is reflected to the second optical device through the diffuse reflection after encountering the diffuse reflection unit; the light of LED lamp source outgoing orientation second optical device follows the law of turning back when hitting the second optical device, one of them part light produces the reflection at the interface, get into optical cavity, another part refraction gets into second optical device, the light that directly once passes through second optical device and the light through first optical device mirror reflection and diffuse reflection passes through second optical device again and reflects and refracts the mixture in the air bed in the second optical device outside, form even light-emitting, therefore this scheme can remove the light guide plate part, therefore, the cost is reduced, alleviate lamps and lanterns weight, the light utilization ratio is high simultaneously, the light-emitting homogeneity is good.

Preferably, the specular reflection layer comprises a support body and a plating layer arranged on one side of the support body, the support body is sheet-shaped, the thickness of the support body is 0.2-2 mm, and the plating layer is made of a specular material and has a thickness of 50-200 μm. The mirror reflection layer is plated on one side of the support body, so that the mirror reflection layer is thin in thickness and light in weight.

Preferably, the support is made of PET, and the coating is made of aluminum. The PET material is light, reduces the lamps and lanterns weight.

Preferably, the diffuse reflection unit protrudes from the surface of the specular reflection layer, the height of the diffuse reflection unit is less than 50 μm, and the diffuse reflection unit is arc-shaped. The arc-shaped diffuse reflection unit can improve the uniformity of the diffused light.

Preferably, the second optical device is in a sheet shape, and the second optical device protrudes to a side away from the first optical device. The convex structure enables the incident angles of the LED light source at all positions of the second optical device to be close to each other, so that the uniformity of light emission is improved.

Preferably, the second optical device has a curved surface shape. And the uniformity of light emission is improved.

Preferably, the second optical device comprises n pieces of surface blocks, wherein an included angle a1 between a first surface block close to the LED light source and the first optical device is included by an angle a1 of 2-10 degrees, the second panel is connected with the first panel, an included angle a2 between the second panel and the first optical device is smaller than an included angle a1, the third panel is connected with the second panel, an included angle a3 between the third panel and the first optical device is smaller than an included angle a2, and the n-th surface block close to the middle part is arranged in parallel with the first optical device. And the uniformity of light emission is improved.

Preferably, one side of the second optical device, which is close to the first optical device, is in a sawtooth shape, the other side of the second optical device is a plane, and the ratio of the height of the sawtooth to the distance of the sawtooth is gradually reduced from the edge of the second optical device to the center of the second optical device. And the uniformity of light emission is improved.

Therefore, the utility model discloses following beneficial effect has: the light guide plate is omitted, the cost is reduced, the weight of the lamp is reduced, the light utilization rate is high, and the light emitting uniformity is good.

Drawings

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a side view of the present invention.

Fig. 4 is a sectional view taken along line a-a of fig. 3.

Fig. 5 is a schematic structural diagram of a second optical device according to the present invention.

Fig. 6 is a schematic structural diagram of a curved second optical device according to the present invention.

Fig. 7 is an enlarged view of the position B in fig. 6 according to the present invention.

Fig. 8 is a schematic structural diagram of a wedge-shaped second optical device according to the present invention.

Fig. 9 is a schematic structural diagram of the frontal sawtooth-shaped second optical device of the present invention.

Fig. 10 is an enlarged view of the point C in fig. 9 according to the present invention.

In the figure: 1. the LED light source comprises a shell 2, a light diffusion device 3, a second optical device 4, an LED light source 5, a first optical device 5-1, a specular reflection layer 5-2, a diffuse reflection unit 6, a rear cover 7, a spring fitting 8, a power line fixing cover plate 9, an optical cavity 10, an air layer theta i, an incident angle h, a height d, a distance a1 and an included angle.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description. It should be noted that as used in the foregoing description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example 1:

in the embodiment shown in fig. 1 to 4, a side-emitting tube lamp includes a housing having a mounting slot and an LED light source 4 disposed in the housing, the housing includes a casing 1 and a rear cover 6, the LED light source is formed by welding light-emitting particles in an annular patch form on a flexible substrate, and the flexible substrate is fixed on the rear cover by a back adhesive. The light-emitting surface of the shell opening is provided with a light diffusion device 2 which is milk white and is used for homogenizing light. The rear cover is provided with a spring fitting 7, a power line fixing cover plate 8, a driver and the like.

The side-emitting lamp further comprises a first optical device 5 and a light-permeable second optical device 3, the first optical device and the second optical device are both disc-shaped, the first optical device is arranged at the bottom of the mounting slotted hole of the shell, the second optical device is arranged above the first optical device and forms an optical cavity 9 with the first optical device, air is filled in the optical cavity, and the optical cavity is used for mixing light. As shown in fig. 5, the first optical device includes a specular reflection layer 5-1 and a plurality of diffuse reflection units 5-2 disposed on the specular reflection layer in a dot array, the diffuse reflection units being gradually dense from the edge to the center of the specular reflection layer. Similarly, the first optical device may be a mirror reflection unit including a diffuse reflection layer and a plurality of mirror reflection units arranged at intervals on the diffuse reflection layer, and the mirror reflection units are gradually thinned from the edge of the diffuse reflection layer to the center. The mirror reflection layer comprises a support body and a plating layer arranged on one side of the support body, the support body is sheet-shaped, the thickness of the support body is 2mm, the support body is made of PET (polyethylene terephthalate) materials, or other thin sheet metal materials or high polymer materials, the plating layer is made of aluminum materials, or other mirror materials, and the thickness of the plating layer is 200 mu m. The diffuse reflection unit protrudes from the surface of the specular reflection layer, is 40 microns high, is arc-shaped or square, can be made of titanium dioxide powder and transparent optical adhesive, has the characteristics of high diffuse reflection rate and no light absorption, and is fixed to the specular reflection layer in a printing mode. The second optical device is made of transparent optical materials with certain strength and thickness.

This scheme light axial is like: when light emitted by the LED lamp source and facing the first optical device is incident on the first optical device, most of the light is reflected to the second optical device through the mirror surface, and a small part of the light is reflected to the second optical device through the diffuse reflection after encountering the diffuse reflection unit; the light emitted by the LED lamp source and facing the second optical device is reflected on the interface and enters the optical cavity, the other part of the light is refracted and enters the second optical device, and the light directly passing through the second optical device for the first time and the light reflected by the mirror surface and the diffuse reflection of the first optical device are reflected and refracted and mixed in the air layer 10 outside the second optical device again to form uniform light emission. This scheme adopts first optical device, the light guide plate is replaced to the second optical device, first optical device has reflection and diffuse reflection function, first optical device can be the structure of the diffuse reflection unit of a plurality of intervals setting on the specular reflection layer, diffuse reflection unit is along keeping away from LED lamp source direction intensive gradually, replace the back plane of reflection of light guide plate, specular reflection and diffuse reflection function can adopt the light material among the prior art to realize, the second optical device of light-permeable also can adopt the light material, this scheme has good light effect, lamps and lanterns surface lighting is even, save the light guide plate and reduced the cost under the circumstances of guaranteeing the effect.

Example 2: in the embodiment shown in fig. 6 to 8, a side-emitting downlight has a structure substantially identical to that of embodiment 1, except that: the second optical device is convex towards the side far away from the first optical device, as shown in figure 6, the second optical device is in a curved surface shape, and the second optical device adopts a PC board.

Since the reflectivity and the incidence angle satisfy:

Rs＝|(n1cosθi-n2cosθt)/(n1cosθi+n2cosθt)|＾2

＝|(n1cosθi-n2√(〖1-(n1/n2 sinθi)〗^2)/(n1cosθi+n2√(〖1-(n1/n2 sinθi)〗^2)))|＾2

Rp＝|n1cosθt-n2cosθi)/(n1cosθt+n2cosθi)|＾2

＝|(n1√(〖1-(n1/n2 sinθi)〗^2)-n2cosθi)/(n1√(〖1-(n1/n2 sinθi)〗^2)+n2cosθi)|＾2

R＝1/2(Rs+Rp)

wherein: r is the reflectance, Rs is the s component perpendicular to the incident surface light vector, Rp is the p component parallel to the incident surface light vector, θ i is the incident angle, θ t is the intermediate variable, n1 is 1, n2 is 1.59, in this embodiment, n2 is the refractive index of the PC board, and other optical materials may be used, and n2 is the refractive index of the corresponding material. With the increase of the incident angle, the reflectivity is larger, the energy close to the LED light source is large, and a bright ring area is often easily formed. As shown in fig. 8, preferably, the second optical device includes a first surface block and a second surface block, where an included angle a1 between the first surface block close to the LED light source and the first optical device is 5 degrees, the second surface block is centered and arranged in parallel with the first optical device, and is connected to the first surface block, and its cross section is similar to a wedge shape, compared with a curved surface structure, the structure can avoid an increase in incident angle of the surface block in the middle, and an increase in incident angle of an area close to the LED light source increases reflectivity at the edge, thereby improving uniformity of light extraction.

Example 3:

as shown in fig. 9 and 10, a side-emitting tube lamp has a structure substantially the same as that of embodiment 2, except that one side of the second optical device, which is close to the first optical device, is provided with a saw-toothed annular microstructure, the other side of the second optical device is a plane, the height h of the saw-toothed annular microstructure is 50-200 μm, the pitch d of the microstructures, the ratio h/d, is sequentially decreased from 0.5 at the edge of the second optical device to the center direction thereof to 0, so as to improve the uniformity of light emission, and the principle of the side-emitting tube lamp is the same as that of embodiment 2, and is more flat and compact in structure and reduces the thickness of the lamp compared with embodiment 2.

Therefore, the utility model discloses can save the light guide plate, reduce cost alleviates lamps and lanterns weight, and light utilization rate is high simultaneously, and the light-emitting homogeneity is good.

It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner of practicing the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and examples. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.

Claims

1. The utility model provides a luminous down lamp of side, is including the casing that is equipped with the installation slotted hole and the LED lamp source of setting in this casing, characterized by, still includes first optical device and light-permeable second optical device, first optical device sets up the installation slotted hole bottom at the casing, the second optical device sets up first optical device's top forms optical cavity rather than, the LED lamp source sets up in the optical cavity side, first optical device includes that specular reflection layer and a plurality of intervals set up the diffuse reflection unit on specular reflection layer, the diffuse reflection unit is along keeping away from LED lamp source direction is intensive gradually.

2. A side-emitting tube lamp as claimed in claim 1, wherein the specular reflection layer comprises a support and a coating layer disposed on one side of the support, the support is in the form of a sheet having a thickness of 0.2-2 mm, and the coating layer is made of specular material and has a thickness of 50-200 μm.

3. A side-emitting downlight according to claim 2, wherein the support is made of PET and the coating is made of aluminum.

4. A side-emitting downlight according to claim 1, wherein the diffuse reflection unit protrudes from a surface of the specular reflection layer to a height of less than 50 μm, the diffuse reflection unit being arcuate.

5. A side-emitting downlight according to claim 1, wherein the second optical element is in the form of a plate, the second optical element projecting away from the first optical element.

6. A side-emitting downlight according to claim 5, wherein the second optical element is curved.

7. A side-emitting tube light as claimed in claim 5, wherein the second optical device comprises n pieces of panel, wherein the first piece near the LED light source has an angle a1 with the first optical device, the angle a1 is between 2 and 10 degrees, the second panel is connected with the first panel, the angle a2 between the second panel and the first optical device is smaller than the angle a1, the third panel is connected with the second panel, the angle a3 between the third panel and the first optical device is smaller than the angle a2, and the n-th piece near the middle is arranged in parallel with the first optical device.

8. A side-emitting downlight according to claim 1 wherein the second optic is serrated on one side adjacent the first optic and planar on the other side, the ratio of the height to the pitch of the serrations decreasing in order from the edge of the second optic to its centre.