CN107477478B

CN107477478B - Lighting device

Info

Publication number: CN107477478B
Application number: CN201710897781.2A
Authority: CN
Inventors: 刘超博; 王洪波; 卫庆军
Original assignee: Opple Road Lighting Co ltd
Current assignee: Opple Road Lighting Co ltd
Priority date: 2017-09-28
Filing date: 2017-09-28
Publication date: 2023-06-30
Anticipated expiration: 2037-09-28
Also published as: CN107477478A

Abstract

The invention discloses a lighting device, which comprises a lamp body, a light source module and a light transmission part, wherein the light source module is arranged in the lamp body, the light transmission part covers the light source module, the light source module comprises a plurality of lenses with accommodating cavities and light emitting units accommodated in the accommodating cavities, light rays emitted by the light emitting units are emitted from the light transmission part after being distributed by the lenses, the light transmission part is in a flat plate shape, the light emitting units are distributed by the lenses to obtain a first light type, the light is distributed again by the light transmission part to obtain a second light type, the ratio of the maximum light intensity of the first light type to the central light intensity is a first ratio, the ratio of the maximum light intensity of the second light type to the central light intensity is a second ratio, and the ratio of the first ratio to the second ratio is larger than 1.1. According to the lighting device, the light intensity reflected by the light transmission part is compensated in the position of the maximum light intensity of the lens, so that the light type finally emitted by the light transmission part meets the requirement of a target light type.

Description

Lighting device

Technical Field

The invention belongs to the technical field of illumination, and particularly relates to an illumination device.

Background

The existing lighting device generally comprises a lamp body, a light source module and a mask, wherein the mask has light transmittance. When the angle of incidence of a ray of light incident on the mask is greater than a certain value, a certain proportion of the reflection occurs.

Because the mask has higher reflectivity for the light with larger incidence angle, the light intensity of the light emitted from a large angle is lost when passing through the mask, so that the difference between the light distribution curve of the lighting device and the light distribution curve of the light source module is larger, and how to enable the lighting device to obtain the light distribution curve corresponding to the target light type is a problem to be solved by technicians in the industry under the condition that the reflectivity exists.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lighting device having a light distribution curve corresponding to a target light pattern.

In order to achieve the above object, the present invention provides a lighting device, which comprises a lamp body, a light source module installed in the lamp body, and a light-transmitting portion covering the light source module, wherein the light source module comprises a plurality of lenses having accommodating cavities and light-emitting units accommodated in the accommodating cavities, light emitted by the light-emitting units is emitted from the light-transmitting portion after being distributed by the lenses, the light-transmitting portion is flat,

the light-emitting unit obtains a first light type after light distribution through the lens, obtains a second light type after light distribution again through the mask,

the ratio of the maximum light intensity of the first light type to the central light intensity is a first ratio, the ratio of the maximum light intensity of the second light type to the central light intensity is a second ratio, and the ratio of the first ratio to the second ratio is larger than 1.1.

Further, the angle of the maximum light intensity of the light rays subjected to the light distribution of the lens is 50-80 degrees.

Further, a ratio of the maximum light intensity to the center light intensity of the first light pattern is greater than 1.8.

Further, the length direction of the lens is longitudinal, the width direction of the lens is transverse, and the central section surface types of the lens in the longitudinal direction and the transverse direction are different.

Further, the lens has a central cross-sectional surface shape in the longitudinal direction of a first surface shape which is an axisymmetric pattern and whose inner surface is a semi-elliptical shape.

Further, the ratio of the minor axis of the receiving cavity on the first profile to the height is less than 1.2.

Further, the ratio of the minor axis of the accommodating cavity on the first surface type to the height is 1.

Further, the first surface comprises a first light incident surface and a first light emergent surface, the first light incident surface and the first light emergent surface are cambered surfaces, and the ratio of the side thickness to the top thickness of the lens is 2-3.

Further, the lens is characterized in that the central section surface type of the lens in the transverse direction is a second surface type, the inner surface of the second surface type is a semi-ellipse, and the outer surface of the second surface type is a curved surface and is in an axisymmetric pattern.

Further, the symmetry axes of the outer surface and the inner surface of the second panel are parallel.

Further, the ratio of the long axis of the accommodating cavity on the second surface model to the height is greater than 6.09.

Further, the ratio of the long axis of the accommodating cavity on the second surface model to the height is 6.51.

Further, the light-transmitting portion is made of glass or made of plastic.

Further, the lighting device further comprises a light source plate, a plurality of light-emitting units are arranged on the light source plate, and one lens corresponds to one light-emitting unit or corresponds to a plurality of light-emitting units.

Further, the lighting device is a street lamp.

Further, the street lamp further comprises a driving power supply assembly accommodated in the lamp body, and the driving power supply assembly is electrically connected with the light source module.

Further, the street lamp comprises a mask connected with the lamp body, and the mask comprises the light-transmitting part and the coating part.

Further, the street lamp further comprises a lamp post, and the lamp body is connected to the lamp post.

Further, the light emitting units and the lens units are distributed in an array.

Further, the lighting device further comprises a reflector arranged in the lamp body, and the reflector is arranged at the periphery of the light source module.

Compared with the prior art, the illumination device provided by the invention has the advantages that the light intensity reflected by the light transmission part is compensated in the position of the maximum light intensity of the lens, so that the light type finally emitted by the light transmission part meets the requirement of the target light type.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a perspective view of a lighting device according to embodiment 1 of the present invention;

fig. 2 is an exploded perspective view of the lighting device of embodiment 1 of the present invention;

fig. 3 is a schematic cross-sectional view of a lighting device according to embodiment 1 of the present invention;

fig. 4 is a perspective view of a lens in a lighting device according to embodiment 1 of the present invention;

FIG. 5 is a top view of the lens based on FIG. 4;

FIG. 6 is a cross-sectional view taken along line A-A in FIG. 5;

FIG. 7 is a cross-sectional view taken along line B-B in FIG. 5;

fig. 8 is a light distribution curve of the illumination device according to embodiment 1 of the present invention after lens light distribution;

fig. 9 is a light distribution curve corresponding to a target light pattern of the illumination device according to embodiment 1 of the present invention after the mask light distribution;

FIG. 10 is a perspective view of a lens according to embodiment 2 of the present invention;

FIG. 11 is a top view of the lens based on FIG. 10;

FIG. 12 is a cross-sectional view taken along line A-A of FIG. 11;

fig. 13 is a sectional view taken along line B-B in fig. 11.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in fig. 1 to 9, embodiment 1 of the present invention provides a lighting device 100, which includes a lamp body 1, a light source module installed in the lamp body 1, and a mask 4 covering the light source module, wherein the light source module includes a light emitting component 2 and a plurality of lenses 3 for distributing light for the light emitting component 2, and light rays exiting from the lenses 3 are emitted from the mask 4. The lighting device 100 provided in the embodiment of the invention can be applied as a street lamp, wherein a radiator 5, a reflector 6 and a driving power supply assembly (not shown) are also installed in the lamp body 1, and a gasket 7 is also arranged between the lamp body 1 and the face mask 4.

The following describes each element and the arrangement relation between the elements in the lighting device 100 according to embodiment 1 of the present invention.

Referring to fig. 2, the lamp body 1 is formed with an accommodating space in which the light emitting assembly 2, the lens 3, the heat sink 5, and the reflector 6 are accommodated, wherein the heat sink 5 is disposed below the light emitting assembly 2, and the reflector 6 is disposed at the periphery of the light source module. In this embodiment, the reflector 6 is diffusely reflective, and since the light emitting component 2 of this embodiment has a bottom, in order to further improve the light emitting efficiency of the light source module, the reflector 6 is disposed, so that a small portion of the light emitted by the light source module that does not irradiate on the mask 4 can be reflected to the mask 4 by the reflector 6, and is emitted by the mask 4. In other alternative embodiments, the reflector 6 may not be provided in case of a position of the light emitting assembly 2 and a level bottom of the mask 4.

The mask 4 includes a light-transmitting portion 41 corresponding to the light source module and a coating portion 42 not corresponding to the light source module. The transparent portion 41 is transparent glass, so that the light emitted by the light source module can be transmitted normally. The coating portion 42 coats an opaque material on the transparent glass to cover the portion of the lamp body 1 without the light source module, so that the lamp is more attractive. The opaque material coated by the coating portion 42 is preferably a high temperature resistant material that prevents the coating material from falling off or aging when the lamp is operated at a higher temperature. Fig. 1 shows a stretching-type arc mask only schematically, but the shape of the mask 4 is not limited to the stretching type, and the arc shape of the mask 4 may be irregular as long as the condition of the incident angle is satisfied.

Referring to fig. 2 and 3, the light emitting assembly 2 includes a light source plate 21 and a plurality of light emitting units 22 disposed on the light source plate 21. The light emitting units 22 may be arranged in one row or in several rows, and in this embodiment, the light emitting units 22 are arranged in an array on the light source board 21. Each light emitting unit 22 is provided with a lens 3. The light emitting unit 22 is an LED light source. In other alternative embodiments, it is also possible that a plurality of light emitting units 22 corresponds to one lens 3.

As shown in fig. 3 to 7, the lens 3 has an inner surface 31, an outer surface 32, and a housing cavity 30 surrounded by the inner surface 31, and the light emitting unit 22 is housed in the housing cavity 30. Referring to the plan view of the lens 3 shown in fig. 3, the lens 3 has an axisymmetric structure, the length direction of the lens 3 is defined as the longitudinal direction, the width direction of the lens 3 is defined as the transverse direction, the intersection point of the center lines of the longitudinal direction and the transverse direction of the lens 3 is defined as a geometric center O point, and the cross section passing through the geometric center O point of the lens 3 is defined as a center cross section. As shown in fig. 5 to 7, the lens 3 includes two kinds of sectional surface shapes in the longitudinal direction and the transverse direction, and as shown in fig. 6, a center sectional surface shape of the lens 3 in the longitudinal direction is defined as a first surface shape; as shown in fig. 7, the lens 3 has a center cross-sectional shape in the lateral direction, which is defined as a second shape.

The first surface includes a first light incident surface 311 and a first light emergent surface 321, the first light incident surface 311 is located on the inner surface 31, and the first light emergent surface 321 is located on the outer surface 32. The first surface is an axisymmetric pattern, that is, the symmetry axes of the first light incident surface 311 and the first light emergent surface 321 coincide. Specifically, the first light incident surface 311 and the first light exiting surface 321 are regular curved surfaces, and the curvature of the first light incident surface 311 is greater than the curvature of the first light exiting surface 321. In the present embodiment, the first light incident surface 311 is a semi-elliptical shape, and the first light emergent surface 321 is an axisymmetric curved surface.

In this embodiment, the ratio of the minor axis b of the receiving cavity 30 on the first profile to the height h is less than 1.2. The short axis b is half the width of the housing cavity 30 in the first plane, that is, half the distance between the side walls of the housing cavity 30 on both sides in the longitudinal direction, and the height h is the vertical distance between the top surface 211 of the light emitting unit and the vertex of the housing cavity 30. For example, referring to fig. 6, the minor axis b of the accommodating cavity 30 on the first surface is 1.94, and the height h is 1.94, then the minor axis b: height h=1.

The ratio of the side thickness d1 of the lens 3 to the center top thickness d2 of the lens 3 is between 2 and 3. For example, referring to fig. 6, the ratio of the side thickness d1 to the center top thickness d2 is 2.5.

The second surface includes a second light incident surface 312 and a second light emergent surface 322, the second light incident surface 312 is located on the inner surface 31, and the second light emergent surface 322 is located on the outer surface 32. The second light incident surface 312 and the second light emergent surface 322 are axisymmetric curved surfaces and are axisymmetric patterns, but the second surface is non-axisymmetric patterns, i.e. the symmetry axis of the second light incident surface 312 is parallel to but not coincident with the symmetry axis of the second light emergent surface 322. Specifically, the second light incident surface 312 is a semi-elliptical shape, and the second light emergent surface 322 is a curved surface and an axisymmetric pattern.

In this embodiment, the ratio of the long axis a to the height h of the receiving cavity 30 on the second surface is greater than 2. The long axis a is half the width of the receiving cavity 30 on the second surface, i.e., half the distance between the lateral side walls of the receiving cavity 30, and the height h is the vertical distance between the top surface 211 of the light emitting unit and the vertex of the receiving cavity 30. For example, referring to fig. 7, the long axis a of the accommodating cavity 30 on the second surface is 4, and the height h is 1.94, then the long axis a: height h=2.06.

In this embodiment, the position of the maximum light intensity after light distribution by the lens 3 is between 50 ° and 80 ° in the longitudinal direction. The light pattern obtained by the light distribution of the light emitting unit 22 through the lens 3 is defined as a first light pattern, and the light pattern obtained by the light distribution again through the mask 4 is defined as a second light pattern, and as shown in fig. 8 and 9, the positions of the maximum light intensities of the first light pattern and the second light pattern are the same, namely, the positions of one side at 65 degrees and the other side at 70 degrees.

Maximum intensity Imax of the first light type ₁ 175cd, center light intensity Io ₁ For 75cd, the ratio of the maximum light intensity to the center light intensity of the first light pattern is a first ratio, where the first ratio is:

Imax ₁ ：Io ₁ ＝2.33；

maximum intensity Imax of the second light type ₂ 155cd, center light intensity Io ₂ For 80cd, the ratio of the maximum light intensity to the center light intensity of the second light pattern is a second ratio, and the second ratio is:

Imax ₁ ：Io ₂ ＝1.94；

from this follows: (Imax) ₁ :Io ₁ ):(Imax ₂ :Io ₂ )＝1.2，

That is, the first ratio to the second ratio has a size of 1.2.

The configuration of the inner surface 31 and the outer surface 32 of the lens 3 can be adjusted according to the specific angle at which the maximum light intensity angle is desired, with the ratio of the first ratio to the second ratio being maintained within a range of more than 1.1.

In the lighting device 100 of embodiment 1 of the present invention, the lens 3 therein compensates the light intensity reflected by the light-transmitting portion 41 at the position where the maximum light intensity is located, so that the light pattern finally emitted from the light-transmitting portion 41 meets the requirement of the target light pattern.

Example 2

As shown in fig. 10 to 13, embodiment 2 of the present invention provides a lens 3' which can be applied to the lighting device 100 provided in embodiment 1.

The lens 3 'has an inner surface 31', an outer surface 32', and a housing cavity 30' surrounded by the inner surface 31', the housing cavity 30' being for housing a light emitting unit (not shown).

Referring to fig. 10 and 11, the lens 3' has an axisymmetric pattern, which is two spherical curved surfaces. The ratio of the length a1 of the lens 3 'to the width b1 of the lens 3' is greater than 1.69. The width b1 of the lens 3' refers to the distance between both ends of the lens 3' on the horizontal axis of the lens 3 '. For example, referring to fig. 12, the length a1 of the lens 3' is 14.64, and the width b1 is 8, then the length a1: width b1=1.83.

The lens 3 'includes two cross-sectional profiles in the longitudinal direction and the transverse direction, defining a cross section passing through the geometric center O' of the lens 3 'as a center cross section, and as shown in fig. 12, the center cross-sectional profile of the lens 3' in the longitudinal direction defines a first profile; referring to fig. 13, the lens 3' is defined as a second profile in a center cross-sectional profile in the lateral direction.

The first surface includes a first light incident surface 311 'and a first light emergent surface 321', the first light incident surface 311 'is located on the inner surface 31', and the first light emergent surface 321 'is located on the outer surface 32'. The first surface is an axisymmetric pattern, that is, the symmetry axes of the first light incident surface 311 'and the first light emergent surface 321' coincide. Specifically, the first light incident surface 311 'and the first light exiting surface 321' are regular curved surfaces, and the curvature of the first light incident surface 311 'is greater than the curvature of the first light exiting surface 321'. In the present embodiment, the first light incident surface 311 'is a semi-elliptical shape, and the first light emergent surface 321' is an axisymmetric curved surface.

In this embodiment, the ratio of the minor axis b ' of the receiving cavity 30' on the first profile to the height h ' is between 1.1 and 1.2. The short axis b 'is half the width of the accommodating cavity 30' on the first surface, and half the distance between the sidewalls of the accommodating cavity 30 'on both sides in the longitudinal direction, and the height h' refers to the vertical distance between the top surface 211 'of the light emitting unit (not shown) and the vertex of the accommodating cavity 30'.

The ratio of the side thickness d1 'of the lens 3' to the center top thickness d2 'of the lens 3' is greater than 3.

The second surface includes a second light incident surface 312 'and a second light emergent surface 322', the second light incident surface 312 'is located on the inner surface 31', and the second light emergent surface 322 'is located on the outer surface 32'. The second light incident surface 312 'and the second light emergent surface 322' are axisymmetric curved surfaces and are axisymmetric patterns, but the second surface is a non-axisymmetric pattern, i.e. the symmetry axis of the second light incident surface 312 'is parallel to but not coincident with the symmetry axis of the second light emergent surface 322'. Specifically, the second light incident surface 312 'is a semi-elliptical shape, and the second light emergent surface 322' is a curved surface and has an axisymmetric pattern.

In this embodiment, the position of the maximum light intensity after the light distribution by the lens 3' is 50 ° to 80 ° in the longitudinal direction. The configuration of the inner surface 31' and the outer surface 32' of the lens 3' may be adjusted according to the particular angle at which the maximum light intensity angle is desired.

The lens 3' provided in embodiment 2 of the present invention is applied to the lighting device 100, and compensates for the light intensity reflected by the light-transmitting portion 41 at the position where the maximum light intensity is located, so that the light pattern finally emitted from the light-transmitting portion 41 satisfies the requirement of the target light pattern.

While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications may be made within the spirit and principles of the invention.

Claims

1. The lighting device is characterized by comprising a radiator, a lamp body, a light source module arranged in the lamp body and a light transmission part covering the light source module, wherein the light source module comprises a light emitting component and a plurality of lenses for distributing light for the light emitting component, the radiator is arranged below the light emitting component, the light emitting component comprises a plurality of light emitting units, the plurality of lenses are provided with accommodating cavities, the light emitting units are accommodated in the accommodating cavities, light rays emitted by the light emitting units are emitted by the light transmission part after being distributed by the lenses, the light transmission part is in a flat plate shape,

the light-emitting unit obtains a first light type after light distribution through the lens, obtains a second light type after light distribution again through the light transmission part,

2. A lighting device as recited in claim 1, wherein the angle at which the maximum intensity of light rays which are distributed through said lens is between 50 ° and 80 °.

3. A lighting device as recited in claim 1, wherein a ratio of a maximum light intensity of said first light type to a center light intensity is 2.33.

4. A lighting device as recited in claim 1, wherein a longitudinal direction of said lens is a longitudinal direction, a width direction of said lens is a transverse direction, and a center cross-sectional plane shape of said lens in said longitudinal direction and said transverse direction are different.

5. A lighting device as recited in claim 4, wherein a center cross-sectional surface shape of said lens in a longitudinal direction is a first surface shape, said first surface shape being an axisymmetric pattern and an inner surface thereof being a semi-elliptical shape.

6. A lighting device as recited in claim 5, wherein a ratio of a minor axis of said receiving cavity in said first profile to a height is less than 1.2.

7. A lighting device as recited in claim 6, wherein a ratio of a minor axis of said receiving cavity to a height of said receiving cavity in said first profile is 1.

8. A lighting device as recited in claim 5, wherein said first surface comprises a first light entrance surface and a first light exit surface, said first light entrance surface and said first light exit surface each being arcuate surfaces, and wherein a ratio of a side thickness of said lens to a center top thickness is between 2 and 3.

9. A lighting device as recited in claim 4, wherein a center cross-sectional surface shape of said lens in a transverse direction is a second surface shape, an inner surface of said second surface shape is a semi-elliptical shape, and an outer surface of said second surface shape is a curved surface and is an axisymmetric pattern.

10. A lighting device as recited in claim 9, wherein axes of symmetry of said second surface and said inner surface are parallel.

11. A lighting device as recited in claim 9, wherein a ratio of a major axis of said receiving cavity on said second surface to a height of said receiving cavity is greater than 2.

12. A lighting device as recited in claim 11, wherein a ratio of a major axis of said receiving cavity on said second surface to a height is 2.06.

13. A lighting device as recited in claim 1, wherein said light-transmitting portion is made of glass or of plastic.

14. A lighting device as recited in claim 1, further comprising a light source board, wherein a plurality of said light-emitting units are disposed on said light source board, one of said lenses corresponding to one of said light-emitting units or to a plurality of said light-emitting units.

15. A lighting device as recited in claim 1, wherein said lighting device is a street lamp.

16. A lighting device as recited in claim 15, wherein said street lamp further comprises a drive power component housed within said lamp body, said drive power component being electrically connected to said light source module.

17. A lighting device as recited in claim 15, wherein said street lamp comprises a mask connected to said lamp body, said mask comprising said light transmissive portion and a coating portion.

18. A lighting device as recited in claim 15, 16 or 17, wherein said street lamp further comprises a light pole, said light body being connected to said light pole.

19. A lighting device as recited in claim 18, wherein said light emitting elements and said lens elements are each distributed in an array.

20. A lighting device as recited in claim 15, further comprising a reflector disposed within said lamp body, said reflector being disposed at an outer periphery of said light source module.