CN220169272U - Secondary reflection dodging system and lamp - Google Patents

Abstract

The utility model discloses a secondary reflection light homogenizing system and a lamp, wherein the secondary reflection light homogenizing system comprises a reflecting shade body, a shading piece and a light source piece, wherein a base is arranged at the tail end of the reflecting shade body; an opening of the reflecting cover body is formed between the tail ends of the two sides; the shading piece and the light source piece are arranged on the base, and the shading piece is closer to the opening than the light source piece; the light shielding piece is provided with a first reflecting surface on one side facing the light source piece, and the reflecting shade body is provided with a second reflecting surface on one side facing the light source piece. The secondary reflection dodging system is characterized in that the light source piece is arranged at the tail end of the reflecting cover body, shading and primary reflection are carried out by matching the shading piece, and the reflecting cover body is secondarily reflected, so that one part of light rays are emitted after passing through the primary reflection of the shading piece and the secondary reflection of the reflecting cover body, and the other part of light rays are emitted after passing through the primary reflection of the reflecting cover body to form scattered light with light intensity close to a circular shape, so that the effects of improving illumination dodging degree and reducing glare are achieved.

Description

Secondary reflection dodging system and lamp

Technical Field

The utility model relates to the technical field of illumination light optimization treatment of LED lamps, in particular to a secondary reflection dodging system and a lamp.

Background

In the LED lamp, most of the LED light sources emit light unidirectionally, and the light emitting angle is about 120 degrees, so that strong light emitted by the LED light sources irradiates in the same direction, local light is too strong, and a glare phenomenon is generated.

In order to reduce the glare of the LED light source, the following scheme is adopted in the illumination field: (1) The acrylic cover with the frosted surface is added, so that the light source is hidden, glare can be eliminated, and light loss can be caused; (2) The glare phenomenon can be relieved by sand blasting on the reflector, but the glare reduction condition is related to the sand blasting layer thickness and diffuse reflection condition; (3) The light emitted by the LED light source is not directly emitted and is realized through side light emission or secondary reflection. The glare can be greatly reduced by reflecting light for the second time. However, some products on the market have uneven light distribution on part of the secondary reflection surfaces due to the problem of the arrangement of the reflection structure, thereby reducing the illumination quality.

The prior art discloses a reflective coating lamp, which comprises a mounting part, a lamp tube and a reflecting plate; the reflector is of a symmetrical arc structure, and the size of the reflector is matched with the size of the lamp tube in the length extension direction; the lamp tubes are symmetrically and fixedly arranged at two ends of the arc-shaped structure of the reflecting plate through lamp holders of the mounting part; the lamp tube is an LED lamp tube; the length extension direction of the LED lamp tube is parallel to the length extension direction of the arc-shaped structure of the reflecting plate. As described above, most of the emergent light rays of the reflective coating lamp are emitted after single reflection, so that glare is reduced to a certain extent, but the light distribution uniformity still does not meet the lighting requirement.

Therefore, it is necessary to optimize the rotation of the existing secondary reflection system, and an optical system with uniform illuminance distribution on the light exit surface and a corresponding lamp are provided.

Disclosure of Invention

In order to solve the problems, the utility model provides a secondary reflection dodging system, wherein a light source piece is arranged at the tail end of a reflecting shade body, shading and primary reflection are carried out by adopting the cooperation of a shading piece, and the reflecting shade body is secondarily reflected, so that one part of light rays are emitted after being subjected to primary reflection of the shading piece and secondary reflection of the reflecting shade body, and the other part of light rays are emitted after being subjected to primary reflection of the reflecting shade body to form scattered light with light intensity close to a circular shape, thereby obtaining the effects of improving illumination dodging degree and reducing glare. The utility model also provides a lamp comprising the secondary reflection dodging system.

In order to achieve the above object, the present utility model provides the following technical solutions:

a secondary reflection dodging system comprises a reflecting shade body, a shading piece and a light source piece,

the reflecting shade body is provided with an arc-shaped structure, and a base is arranged at the tail end of the reflecting shade body; an opening of the reflecting cover body is formed between the tail ends of the two sides;

the light shielding piece and the light source piece are arranged on the base, and the light shielding piece is closer to the opening than the light source piece;

the light shielding member is provided with a first reflecting surface on a side facing the light source member,

the reflecting shade body is provided with a second reflecting surface on one side facing the light source piece.

In the secondary reflection dodging system, part of light rays emitted by the light source part are reflected to the second reflecting surface of the reflecting shade body through the first reflecting surface arranged on the shading part, and the rest part is shaded by the shading part.

As a preferred embodiment, the light source emits light:

the first part of the light rays emitted by the light source element enters the second reflecting surface of the reflecting shade body after being reflected by the first reflecting surface of the shading element, and exits from the opening after being reflected by the second reflecting surface;

the second part is reflected by the second reflecting surface of the reflecting cover body and then exits from the opening.

As a preferred embodiment, on the section of the secondary reflection dodging system, the reflecting cover body is provided with a symmetrical arc structure, and the light source parts are symmetrically arranged on the bases at two ends of the reflecting cover body.

As a preferred embodiment, on the cross section of the secondary reflection dodging system, the cross section of the reflector body is an elliptical part, the central point of the ellipse is taken as an origin, the axis passing through the origin horizontally is taken as an x-axis, and the axis passing through the origin vertically is taken as a y-axis, so as to establish a coordinate system; the ellipse has the following equation:

wherein a is the length of the long half shaft, and b is the length of the short half shaft.

As a preferred embodiment, the ratio of the length a of the major half shaft to the length b of the minor half shaft is k,

wherein, the value range of k is more than 1 and less than 2.

As a preferred embodiment of the present utility model,

when k is more than 1.5 and less than 2, the surface uniformity of the second reflecting surface is 65-75%;

when k is greater than 1 and less than 1.5, the surface uniformity of the second reflecting surface is 75-85%;

the surface uniformity of the second reflecting surface is greater as k is closer to 1.

As a preferred embodiment, the light source member is located below the origin, and the light source member is adhesively fixed to the base; on the section of the secondary reflection dodging system, a normal L passing through the center point of the luminous surface of the light source piece intersects with the reflecting shade body at an E point at one side far away from the light source piece, and a tangent T passing through the E point is mutually perpendicular to the normal L;

the symmetry axis of the light source piece positioned on the bases at the two ends of the reflecting shade body is a y axis.

As a preferred embodiment, on the cross section of the secondary reflection dodging system, a light emitting point at the uppermost end of the light emitting surface of the light source piece on the base at one side of the reflector body is m, and the end points at the end of the other side of the reflector body are n, and the m and the n are used as the end points to form a line segment mn; the outer end point p of the shading piece is positioned on the line segment mn.

As a preferred embodiment, a reflective paper or a reflective film with high diffuse reflectance is adhered to the first reflective surface, or a reflective paint with high diffuse reflectance is sprayed on the first reflective surface;

and the second reflecting surface is adhered with reflective paper or reflective film with high diffuse reflectance or sprayed with reflective paint with high diffuse reflectance.

The utility model also provides a lamp, which comprises the secondary reflection light homogenizing system.

Based on the technical scheme, the utility model has the following technical effects:

1. according to the secondary reflection light homogenizing system provided by the utility model, the light source piece and the light shielding piece are arranged at the tail end of the reflecting shade body, and the light shielding piece is closer to the opening of the reflecting shade body, so that part of light rays emitted by the light source piece need to be processed by the light shielding piece, the part of light rays are reflected to the second reflecting surface of the reflecting shade body by the first reflecting surface of the light shielding piece, and are emitted from the opening after being secondarily emitted by the second reflecting surface; the other part of light rays are reflected once by the reflecting cover body to form scattered light with the light intensity close to a circular shape, so that the uniformity of illuminance distribution of the light emergent surface can be improved, and the glare is reduced.

2. The lamp adopts the secondary reflection light homogenizing system, so that the glare problem caused by direct light is avoided, the emergent light is uniform and soft, and the illumination intensity requirement of a lighting place is met.

Drawings

Fig. 1 is a schematic structural diagram of a secondary reflection dodging system in embodiment 1.

Fig. 2 is a cross-sectional view of the secondary reflection dodging system of embodiment 1.

Fig. 3 is a schematic diagram of the light path of the second portion of the light emitted from the light source in embodiment 1.

Fig. 4 is a partial enlarged view of a cross section of the secondary reflection dodging system of example 1.

Fig. 5 is a cross-sectional view of a secondary reflection dodging system as disclosed in example 2.

Fig. 6 is a cross-sectional view of a secondary reflection dodging system as disclosed in example 3.

Detailed Description

In order that the utility model may be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

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

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Example 1

Fig. 1 is a schematic structural diagram of a secondary reflection dodging system according to the present embodiment, fig. 2 is a cross-sectional view of the secondary reflection dodging system according to the present embodiment, and referring to fig. 1 and 2, a secondary reflection dodging system 100 is provided for reducing glare and improving illumination uniformity. The secondary reflection dodging system 100 comprises a reflector body 1, a shading piece 2 and a light source piece 3, wherein the shading piece 2 and the light source piece 3 are arranged on the reflector body 1. Wherein, the reflector body 1 has an arc structure, the reflector body 1 is provided with a base 4 at the tail end 11, and the base 4 can be a flexible plastic plate or a rigid metal plate. In some embodiments, when the base 4 is a flexible plastic plate, the base may be attached to the end 11 along the arc-shaped structure of the reflector 1; in some embodiments, when the base 4 is a rigid metal plate, such as an aluminum substrate, it may be bonded and welded to the end 11 of the reflector body 1, with an adhesive or welding rod filled between the base 4 and the end 11. In the present embodiment, the base 4 is provided as a rigid aluminium base plate, which base 4 is glued to the end 11 of the reflector body 1 by means of glue, such as epoxy glue having heat conducting properties.

Between the ends 11 of the reflector body 1, an opening 12 of the reflector body 1 is formed. The opening 12 is a light outlet of the secondary reflection dodging system 100, that is, the light emitted by the light source 3 needs to be emitted through the opening 12, so as to irradiate into the target illumination range. As shown in fig. 1, the light shielding member 2 and the light source member 3 are both provided on the base 4, and the light shielding member 2 is closer to the opening 12 than the light source member 3. It is understood that the light shielding member 2 is provided at the lower end of the light source member 3. The base 4 is a rigid heat-conducting aluminum substrate, and when the light source part 3 generates heat, the heat can be transferred to the outer side wall of the reflector through the aluminum substrate and the heat-conducting glue layer, so that the heat is emitted.

The light source component 3 is an LED module comprising a light source substrate and a plurality of LED lamp beads attached to the light source substrate, and the LED module is an SMD patch type LED light source module. In some embodiments, the light source 3 may also be a COB (chip on board) package.

In the secondary reflection dodging system 100 of the present embodiment, the light shielding member 2 is provided with the first reflection surface 21 on the side facing the light source member 3, and the reflecting shade body 1 is provided with the second reflection surface 13 on the side facing the light source member 3.

The light emitted from the light source member 3 is split into two parts to be emitted according to the following paths:

the first part of light emitted by the light source 3 is reflected by the first reflecting surface 21 of the light shielding member 2, enters the second reflecting surface 13 of the reflector 1, is reflected by the second reflecting surface 13, and exits from the opening 12.

Fig. 3 is a schematic light path diagram of a second portion of light emitted by the light source in the embodiment, as shown in fig. 3, the second portion of light emitted by the light source 3 is directly reflected by the second reflecting surface 13 of the reflector body 1, and then exits from the opening 12.

The light is diffusely reflected by the second reflecting surface 13, and the reflected portion of the light incident on the second reflecting surface 13 is emitted as heat radiation light, and the light intensity distribution of the scattered light is close to a circle, which is tangential to the second reflecting surface.

With continued reference to fig. 2, in the cross section of the secondary reflection dodging system of the present embodiment, the reflector 1 has a symmetrical arc structure, and the light source members 3 are symmetrically disposed on the bases 4 at both ends of the reflector 1.

Further, in the cross section of the secondary reflection dodging system of the present embodiment, the arc-shaped cross section of the reflector 1 is an elliptical portion. As shown in fig. 2, a coordinate system is established with the center point of the ellipse as the origin O, the axis passing horizontally through the origin as the x-axis, and the axis passing vertically through the origin as the y-axis.

The ellipse where the arc-shaped section of the reflector body 1 is located has the following equation:

wherein a is the length of the long half shaft, and b is the length of the short half shaft.

The ratio of the length a of the major half shaft to the length b of the minor half shaft is k,

wherein, the value range of k is more than 1 and less than 2.

In some embodiments, when k is greater than 1.5 and less than 2, the surface uniformity of the second reflective surface 13 is between 65-75%;

in some embodiments, the surface uniformity of the second reflective surface 13 is between 75-85% when k is greater than 1 and less than 1.5;

in some embodiments, the surface uniformity of the second reflective surface 13 is greater as k is closer to 1.

In this embodiment, the second reflecting surface 13 is stretched along the axis by the elliptical arc described above. Specifically, a diffuse reflection material layer is disposed on the second reflection surface 13, and the second reflection surface 13 may be adhered with reflective paper or reflective film with high diffuse reflectance, or sprayed with reflective paint with high diffuse reflectance. Thus, the light incident at the second reflecting surface 13 will be scattered light by its secondary or primary reflection.

Since light rays are emitted from the opening after being reflected once or twice on the second reflecting surface, the diffuse reflection paint layer or the diffuse reflection paper on the second reflecting surface needs to achieve the reflectivity efficiency of more than 97% in order to avoid low light emitting efficiency.

Similarly, a diffuse reflection material layer may be disposed on the first reflection surface 21 of the light shielding member 2, and the first reflection surface 21 may be adhered with a reflective paper or a reflective film with high diffuse reflectance, or sprayed with a reflective paint with high diffuse reflectance.

In the light shielding member 2 and the reflecting shade body 1 of the present embodiment, the diffuse reflection effect with high reflectance is achieved by spraying the reflective paint with high diffuse reflectance on the first reflecting surface 21 and the second reflecting surface 13. The reflectivity of the nanometer high diffuse reflection reflective coating formed by the first reflective surface 21 and the second reflective surface 13 is more than 97%, so that the LED light can be almost totally reflected, and the light loss is reduced to the minimum; in addition, the light reflected by the nanometer high-diffuse-reflection reflective coating is not reflected in one direction, but scattered in the periphery, and the diffuse reflectance is as high as 97%, so that the light emitted by the LED in one direction becomes uniformly scattered in the periphery, and the glare phenomenon is reduced.

Fig. 4 is a partial enlarged view of a cross section of the secondary reflection dodging system according to the present embodiment, and referring to fig. 2 and 4, the cross section of the secondary reflection dodging system uses an elliptical center point as an origin O, an axis passing horizontally through the origin as an x-axis, and an axis passing vertically through the origin as a y-axis. The light source member 3 of the present embodiment is located below the origin O, and the light source member 3 is adhesively fixed to the base 4.

(1) The normal L passing through the center point of the luminous surface of the light source piece 3 intersects with the reflecting shade body 1 at the E point at one side far away from the light source piece 3, and the tangent T passing through the E point is mutually perpendicular to the normal L; and the symmetry axis of the light source 3 on the bases 4 at the two ends of the reflector body 1 is the y axis.

(2) On the section of the secondary reflection dodging system, one luminous point at the uppermost end of the luminous surface of the light source part 3 on the base at one side of the reflecting shade body 1 is m, the end points at the tail end of the other side of the reflecting shade body 1 are n, and m and n are used as end points to form a line segment mn; the outer end point p of the shade 2 is located on the line segment mn.

On the basis of meeting the conditions (1) and (2), the light emitted by the light source element 3 can be blocked by the light shielding element 2, namely, the light emitted by the light source element 3 needs to be reflected once by the second reflecting surface, or the light can be emitted from the opening after being reflected once by the first reflecting surface and reflected twice by the second reflecting surface, so that the purposes of homogenizing light and reducing glare are achieved.

It should be noted that, the first reflecting surface of the light shielding member 2 is parallel to the normal L passing through the center point of the light emitting surface of the light source member 3, and the distance between the first reflecting surface and the light source member 3 is as close to the light source member 3 as possible under the condition that the structural size allows and satisfies the safety rule, so as to improve the overall lamp efficiency.

According to the secondary reflection dodging system provided by the embodiment, the light source piece and the shading piece are arranged at the tail end of the reflecting shade body, and the shading piece is closer to the opening of the reflecting shade body, so that part of light rays emitted by the light source piece need to be processed through the shading piece, wherein part of light rays are reflected to the second reflecting surface of the reflecting shade body by the first reflecting surface of the shading piece, and are emitted from the opening after secondary emission is carried out on the second reflecting surface; the other part of light rays are reflected once by the reflecting cover body to form scattered light with the light intensity close to a circular shape, so that the uniformity of illuminance distribution of the light emergent surface can be improved, and the glare is reduced.

Example 2

Fig. 5 is a cross-sectional view of a secondary reflection dodging system of the present embodiment, referring to fig. 5 on the basis of fig. 2, in the secondary reflection dodging system of the present embodiment, an ellipse where an arc-shaped cross section of a reflector body 1 is located has the following equation:

i.e. a=110 mm, b=70 mm, c=40.25 mm;

h=25.22mm, h is the distance between the center point of the light emitting surface of the light source piece and the origin.

The length z=18.44 mm of the shade 2 and the length d=180 mm of the opening 12 of the reflector body 1.

K=1.57, and the uniformity of the surface brightness of the second reflecting surface of the reflector body 1 is 72%;

in the secondary reflection dodging system of the embodiment, the light rays convert the point light emission of the light source part into surface light emission through primary/secondary reflection; the highest brightness of the second reflecting surface can be 0.9% of the brightness of the light source, and the reduction of the brightness improves the comfort level of illumination, reduces glare and reduces the UGR value to below 10.

Example 3

Fig. 6 is a cross-sectional view of a secondary reflection dodging system of the present embodiment, referring to fig. 6 on the basis of fig. 2, in the secondary reflection dodging system of the present embodiment, an ellipse where an arc-shaped cross section of a reflector body 1 is located has the following equation:

i.e. a=132 mm, b=120 mm, c=45 mm;

h=35.45 mm, h is the distance between the center point of the light emitting surface of the light source piece and the origin.

The length z=37.78 mm of the shade 2 and the length d= 241.96mm of the opening 12 of the reflector body 1.

K=1.1, and the uniformity of the surface brightness of the second reflecting surface of the reflector body 1 is 83%;

in the secondary emission dodging system of the embodiment, the light rays convert the point light emission of the light source part into surface light emission through primary/secondary reflection; the highest brightness of the second reflecting surface can be 0.8% of the brightness of the light source, and the reduction of the brightness improves the comfort level of illumination, reduces glare and reduces the UGR value to below 10.

Example 4

The embodiment provides a lamp, and the lamp adopts the secondary reflection dodging system of embodiment 1, embodiment 2 or embodiment 3, so that the glare problem caused by direct light can be avoided, the emergent light is uniform and soft, and the illumination intensity requirement of a lighting place is met.

The foregoing is merely illustrative and explanatory of the utility model as it is described in more detail and is not thereby to be construed as limiting the scope of the utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the utility model, and that these obvious alternatives fall within the scope of the utility model.

Claims (10)

1. A secondary reflection dodging system is characterized by comprising a reflecting shade body, a shading piece and a light source piece,

the reflecting shade body is provided with an arc-shaped structure, and a base is arranged at the tail end of the reflecting shade body; an opening of the reflecting cover body is formed between the tail ends of the two sides;

the light shielding piece and the light source piece are arranged on the base, and the light shielding piece is closer to the opening than the light source piece;

the light shielding member is provided with a first reflecting surface on a side facing the light source member,

the reflecting shade body is provided with a second reflecting surface on one side facing the light source piece.

2. The secondary reflection dodging system as claimed in claim 1, wherein the light emitted from said light source element, after being reflected by the first reflecting surface of said light shielding element, enters the second reflecting surface of said reflector body, and after being reflected by said second reflecting surface, exits from said opening;

the second part is reflected by the second reflecting surface of the reflecting cover body and then exits from the opening.

3. The secondary reflection dodging system as claimed in claim 1, wherein said reflector body has a symmetrical arc structure in a cross section of said secondary reflection dodging system, and said light source members are symmetrically disposed on bases at both ends of said reflector body.

4. The secondary reflection dodging system as claimed in claim 3, wherein on a cross section of said secondary reflection dodging system, a cross section of said reflector body is an elliptical portion, a center point of the ellipse is taken as an origin, an axis passing horizontally through the origin is taken as an x-axis, and an axis passing vertically through the origin is taken as a y-axis, and a coordinate system is established; the ellipse has the following equation:

wherein a is the length of the long half shaft, and b is the length of the short half shaft.

5. The secondary reflection dodging system as claimed in claim 4, wherein the ratio of the length a of the longer half-axis to the length b of the shorter half-axis is k,

wherein, the value range of k is more than 1 and less than 2.

6. The secondary reflection dodging system as claimed in claim 5, wherein,

when k is more than 1.5 and less than 2, the surface uniformity of the second reflecting surface is 65-75%;

when k is greater than 1 and less than 1.5, the surface uniformity of the second reflecting surface is 75-85%;

the surface uniformity of the second reflecting surface is greater as k is closer to 1.

7. The secondary reflection dodging system as claimed in claim 4, wherein said light source member is located below said origin, said light source member being adhesively secured to said base; on the section of the secondary reflection dodging system, a normal L passing through the center point of the luminous surface of the light source piece intersects with the reflecting shade body at an E point at one side far away from the light source piece, and a tangent T passing through the E point is mutually perpendicular to the normal L;

the symmetry axis of the light source piece positioned on the bases at the two ends of the reflecting shade body is a y axis.

8. The secondary reflection dodging system as claimed in claim 4, wherein on the cross section of said secondary reflection dodging system, a light emitting point at the uppermost end of the light emitting surface of the light source member on the base at one side of said reflector body is m, and the end points at the end of the other side of said reflector body are n, and the line segment mn is formed by using m and n as the end points; the outer end point p of the shading piece is positioned on the line segment mn.

9. The secondary reflection dodging system as claimed in claim 1, wherein,

a reflective paper or a reflective film with high diffuse reflectance is adhered to the first reflective surface, or a reflective paint with high diffuse reflectance is sprayed on the first reflective surface; and the second reflecting surface is adhered with reflective paper or reflective film with high diffuse reflectance or sprayed with reflective paint with high diffuse reflectance.

10. A luminaire comprising the secondary reflection light homogenizing system of any one of claims 1 to 9.