CN110886976A

CN110886976A - LED lamp with uniform illumination

Info

Publication number: CN110886976A
Application number: CN201911147299.2A
Authority: CN
Inventors: 房磊; 赵铭海; 何祖平
Original assignee: Self Electronics Co Ltd
Current assignee: Ningbo Self Electronics Co Ltd; Self Electronics Co Ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-03-17
Also published as: EP4062099A1; WO2021099026A1

Abstract

The invention relates to an LED lamp with uniform illumination, which comprises at least two light sources, wherein the light sources are arranged side by side along the length direction of the lamp, and the extension lines of the optical axes of the light sources are intersected; the emergent light of at least one light source irradiates to a surface to be irradiated, which is far away from the lamp, and the rest light sources irradiate to the surface to be irradiated, which is near to the lamp, and the parts, which are close to each other, of the at least one light source and the rest light sources form adjacent regions; the exit end of the at least one light source is provided with a condensing lens, light rays of the rest light sources are freely emitted, and side light rays of the at least one light source, which are close to the adjacent region, are projected by the condensing lens and then are connected with light rays of the rest light sources, which are projected to the adjacent region, so as to cover the adjacent region; the thickness of one side of the condensing lens close to the adjacent area is larger than that of the middle of the condensing lens, so that the illuminance formed by converging the side light of the at least one light source through the one side is consistent with that of the rest to-be-irradiated surfaces. The lamp has the advantage of uniform illumination.

Description

LED lamp with uniform illumination

Technical Field

The invention relates to the field of lamps, in particular to an LED lamp with uniform illumination.

Background

LED lamps are used more and more commonly in life, and are particularly common in display cabinets such as markets. In order to satisfy the lamps and lanterns can illuminate far away goods and nearer goods simultaneously, and make the illumination that falls on different goods far and near the same, the designer tries to set up a plurality of light source subassemblies on the lamps and lanterns, and the certain contained angle setting is personally submitted in the installation of these a plurality of light source subassemblies to make partly light source subassembly be used for shining far away and another part light source subassembly is used for shining near.

For example, chinese patent application CN201210441421.9, the lamp includes at least one light emitting module, the light emitting module includes at least two sets of light sources, and the extension line of the light emitting center line of the light source has an intersection point, so that a certain included angle is formed between the adjacent light sources, thereby facilitating the irradiation in each direction.

Although this kind of design can be followed the even problem of the face illuminance of being shone to a certain extent, the effect is not very ideal, because the regional emergent ray is all very weak separately that two light sources are close to each other, the region that is close to each other that causes two light sources easily only has few light or does not have light at all, produces the dark space for it is inhomogeneous to finally shine the face illuminance, especially when all setting up the lens module on every group light source, because the focusing action of lens module, this problem is more obvious.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide an LED lamp with uniform illumination, so as to solve the above problems.

In order to achieve the purpose, the technical scheme of the invention is as follows: an LED lamp with uniform illumination comprises at least two light sources, wherein the light sources are arranged side by side along the length direction of the lamp, and the extension lines of the optical axes of the light sources are intersected;

the emergent light of at least one light source irradiates to a surface to be irradiated, which is far away from the lamp, and the rest light sources irradiate to the surface to be irradiated, which is near to the lamp, and the parts, which are close to each other, of the at least one light source and the rest light sources form adjacent regions;

the method is characterized in that:

the exit end of the at least one light source is provided with a condensing lens, light rays of the rest light sources are freely emitted, and side light rays of the at least one light source, which are close to the adjacent region, are projected by the condensing lens and then are just connected with light rays of the rest light sources, which are projected to the adjacent region, so as to cover the adjacent region;

the thickness of one side of the condensing lens close to the adjacent area is larger than that of the middle of the condensing lens, so that the illuminance formed by converging the side light of the at least one light source through the one side is consistent with that of the rest to-be-irradiated surfaces.

Furthermore, the light-emitting surface of the condenser lens is a plane, and the thickness of the condenser lens is gradually reduced from a side close to the adjacent region to the middle of the lens.

Further, the illumination intensity of the at least one light source is greater than the illumination intensity of the remaining light sources.

Furthermore, the at least one light source and the residual light sources comprise circuit boards and point light sources which are arranged on the circuit boards and distributed along the length direction of the circuit boards;

the density of the point light sources on the circuit board of the at least one light source is greater than the density of the point light sources on the circuit boards of the remaining light sources.

Furthermore, the surface of the light-emitting surface of the condensing lens corresponding to the position of the point light source is provided with a plurality of strips which are parallel and vertical to the length direction of the lamp.

Further, the strip shape forms a circular shape.

Furthermore, the strip-shaped light emergent surface of the condensing lens is of a frosted design.

Furthermore, one side of the circuit board of the at least one light source is provided with a positioning hole for preventing the condenser lens from being reversely arranged, and the back of the light-emitting surface of the condenser lens is provided with a positioning column matched with the positioning hole.

Furthermore, the circuit board of at least one light source is provided with mounting holes formed between the point light sources, the back of the light-emitting surface of the condenser lens is provided with mounting columns, the lower ends of the mounting columns are formed with melting columns, and the melting columns are suitable for being inserted into the mounting holes and are melted when heated so as to fixedly connect the mounting columns with the mounting holes.

Compared with the prior art, the invention has the advantages that: the condensing lens arranged at the emergent end of each light source is replaced by the lens arranged at the emergent end of the light source which only irradiates a far part, and the thickness of one side of the lens, which faces to an adjacent region formed by the light source irradiating the far part and the light source irradiating the near part, is thicker, so that the converging effect of the condensing lens can be well played, the problem of a dark region caused by less light rays irradiating the far part to the adjacent region and insufficient light rays irradiating the near part to the adjacent region is solved, the brightness of emergent light rays from the light source irradiating the far part is ensured to be consistent with that of emergent light rays from the light source irradiating the near part, and the uniform illumination of different irradiation surfaces is realized.

Drawings

Fig. 1 is a structural diagram of a preferred embodiment of the LED lamp with uniform illumination according to the present application.

Fig. 2 is a schematic diagram of the exploded structure of fig. 1.

Fig. 3 is another angle structure diagram of fig. 2.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Fig. 1 to 3 show a preferred structure embodiment of the LED lamp with uniform illumination according to the present invention. The LED lamp comprises a lamp body 1 and mounting seats 2 arranged at two ends of the lamp body 1, wherein the lamp 1 comprises a lampshade 11, a base 12 and at least two light sources arranged on the base 12 side by side along the length direction of the lamp, and the extension lines of the light axes of the light sources are intersected. The mounting base 2, the lampshade 11, the base 12 and the like are conventional components of the LED lamp, and are known to those skilled in the art, so they are not described in detail. It should be noted, however, that as known to those skilled in the art, the base 12 is mainly used for carrying the light source, so it is easy to think that the base 12 is correspondingly shaped or configured for a certain purpose, but since this is not the focus of the present application and can be adjusted according to actual needs in the actual production process, it is not too much expanded here, and the contents of the base related to the protection point of the present application will be briefly illustrated below.

Because the distance that article were put in the showcase has nearly to have far away, this just leads to some article probably to be located under the LED lamps and lanterns, and some keep away from the LED lamps and lanterns, article that probably has the distant place can't be shone, cause the unable fine quilt of product show, and when the optical axis extension line of light source was crossing, it is not parallel arrangement to mean a plurality of light sources promptly, but there is certain contained angle, also there is certain design contained angle between the installation face of light source, light can shoot near also can shoot far away like this, thereby make the article that is located the distant place also can receive illumination. In the present application, at least one of the light sources is used to illuminate a surface to be illuminated that is farther away from the luminaire and the remaining light sources are used to illuminate a surface to be illuminated that is closer to the luminaire, and for convenience of description, the portions of the at least one light source and the remaining light sources that are close to each other form adjacent regions.

In the present embodiment, the number of the light sources is preferably two, and as shown in fig. 2, the light sources 13 and 14 are both arranged on the base 12 side by side along the length direction of the lamp, and there is a certain inclination between the

substrates

12A and 12B for carrying the light sources 13 and 14, so that the optical axis extension lines of the light sources 13 and 14 can intersect, and at the same time, the light source 13 is used for illuminating a far place and the light source 14 is used for illuminating a near place.

In order to solve the problems that a dark area exists between adjacent areas and the illuminance of different illumination surfaces is not uniform, the emitting end of at least one light source is provided with a condensing lens, the light of the rest light sources is emitted freely, the side light of the at least one light source, which is close to the adjacent area, is projected by the condensing lens and then is just connected with the light of the rest light sources, which is projected to the adjacent area, so as to cover the adjacent area, meanwhile, the thickness of one side of the condensing lens, which is close to the adjacent area, is larger than the thickness of the middle part of the condensing lens, so that the illuminance formed after the side light of the at least one light source is converged by the side of the condensing lens.

Specifically, in the present embodiment, the light emitting end of the light source 13 is provided with the condensing lens 15, and the light emitted from the light source 14 is emitted freely, obviously, in order to achieve that the adjacent region has no dark area and prevent the illumination intensity of the adjacent region from being too strong due to light superposition, the light emitted from the side surface of the light source 13 to the adjacent region is exactly connected with the light emitted from the light source 14 to the adjacent region, so as to just cover the adjacent region, needless to say, the point can be obtained by continuously adjusting the included angle between the light sources 13 and 14 in the actual production process.

On the basis, in view of the fact that the condensing lens 15 can condense light, the brightness of the same light is far larger than the brightness of the same light which is not focused, the light energy emitted from the side face of the light source is very weak, and due to the characteristic that the light source 13 is used for illuminating a far distance, when the thickness of one side, close to an adjacent region, of the condensing lens 15 is larger than the thickness of the middle of the condensing lens, and the light emitted from the side face of the light source 13 is condensed by a thick part of the lens and then is projected to the adjacent region, the situation that the emitted light energy is equivalent to the light energy projected to the adjacent region by the light source 14 exists, so that the illumination and the uniform; meanwhile, based on the characteristic that energy attenuation exists in the light running process, although the energy of the light source 13 is greater than the energy freely emitted by the light source 14 after being focused, more energy attenuation exists when the light is emitted to a far place, so that the problem of uneven light intensity caused by a focusing lens is solved, the effect of uniform illumination of different illumination surfaces is realized, namely, the illumination of the surface to be illuminated close to the lamp and the illumination of the surface to be illuminated far away from the lamp are approximately the same; for the light source 13, although the light emitted from the middle portion thereof is stronger, since the corresponding lens is thinner and the irradiation distance is longer, the energy attenuation is more than that of other portions, so that the illumination intensity finally formed by the light source 13 on the surface to be irradiated is the same as that of the light source 14, and thus the illumination intensity of the adjacent area is finally equivalent to that of the rest of the surface to be irradiated.

In order to save cost and facilitate faster and better realization of illumination uniformity during production and debugging, as a preferred case and suitable for practical lighting requirements, the illumination brightness of the light source 13 is greater than that of the light source 14, specifically, the light source 13 and the light source 14 each include a

circuit board

131, 141 and

point light sources

132, 142 respectively and correspondingly disposed on the

circuit board

131, 141 and arranged along the length direction thereof, and the density of the point light sources 132 on the circuit board 131 is greater than that of the point light sources 142 on the circuit board 141, as shown in fig. 2.

In this embodiment, the mounting base 2 is fixedly connected to two sides of the base 2 through the screws 3, and for convenience of design and production, the substrate 12A of the base 12 carrying the light source 13 is parallel to a plane formed by central axes of the two screws 3, and the substrate 12B carrying the light source 14 forms a certain included angle with the substrate 12A, so as to satisfy that the light source 14 irradiates a near-end article and the light source 13 irradiates a far-end article.

With reference to fig. 2, the light-emitting surface of the condenser lens 15 is a plane, and the thickness of the light-emitting surface gradually decreases from a side close to an adjacent region to the middle of the lens. In order to diffuse the light in the longitudinal direction of the lamp and make the light more uniform, preferably, the condenser lens 15 has a plurality of strips 151 parallel to the longitudinal direction of the lamp on the surface of the light exit surface corresponding to the position of the point light source 132. In this embodiment, the plurality of stripes 151 are formed in a circular shape, and the light-emitting surface of the condenser lens 15 on which the stripes 151 are disposed is a frosted design.

The condenser lens 15 may have a plurality of groups, and each group may include a plurality of sub-lenses, and in this embodiment, the condenser lens 15 is formed by 5 sub-lenses 152 in succession. When the number of the sub-lenses is large, the installation is inconvenient, in order to improve the installation efficiency, a positioning hole for preventing the condenser lens from being installed reversely is arranged on one side of the circuit board corresponding to the light source irradiating the far end, and a positioning column matched with the positioning hole is correspondingly arranged on the back of the light-emitting surface of the condenser lens, in the application, a positioning hole 133 for preventing the condenser lens from being installed reversely is arranged on one side of the circuit board 131, and a positioning column 153 is arranged on the back of the light-emitting surface of the condenser.

In order to fix the lens and the circuit board, as an improvement, the circuit board 131 is provided with mounting holes 134 formed between the point light sources 132, the back of the light-emitting surface of the condenser lens 15 is provided with mounting posts 154, the lower ends of the mounting posts 154 are formed with melting posts 155, and the melting posts 155 are adapted to be inserted into the mounting holes 134 and melted when heated so as to fixedly connect the mounting posts 154 and the mounting holes 134.

While embodiments of the invention have been shown and described, it will be understood by those skilled in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An LED lamp with uniform illumination comprises at least two light sources (13, 14), wherein the light sources (13, 14) are arranged side by side along the length direction of the lamp, and the extension lines of the optical axes of the light sources (13, 14) are intersected;

the emergent light of at least one light source (13) irradiates to a surface to be irradiated, which is far away from the lamp, and the rest light sources (14) irradiate to a surface to be irradiated, which is near to the lamp, and the parts, close to each other, of the at least one light source (13) and the rest light sources (14) form adjacent regions;

the method is characterized in that:

the emergent end of the at least one light source (13) is provided with a condensing lens (15) and the light rays of the rest light sources (14) are freely emitted, and the side light rays of the at least one light source (13) close to the adjacent region are just connected with the light rays of the rest light sources (14) projected to the adjacent region after being projected by the condensing lens (15) so as to cover the adjacent region;

the thickness of one side of the condenser lens (15) close to the adjacent area is larger than that of the middle of the condenser lens, so that the illuminance formed by converging the side light of the at least one light source (13) through the one side is consistent with the illuminance on the rest to-be-irradiated surfaces.

2. The uniform illuminance LED light fixture of claim wherein:

the light-emitting surface of the condenser lens (15) is a plane, and the thickness of the condenser lens is gradually reduced from one side close to the adjacent area to the middle of the lens.

3. The LED lamp of claim 1, wherein:

the illumination intensity of the at least one light source (13) is greater than the illumination intensity of the remaining light sources (14).

4. The LED lamp of claim 3, wherein:

the at least one light source (13) and the residual light sources (14) comprise circuit boards and point light sources which are arranged on the circuit boards and distributed along the length direction of the circuit boards;

the density of point light sources (132) on the circuit board (131) of the at least one light source (13) is greater than the density of point light sources (142) on the circuit board (141) of the remaining light sources (14).

5. The LED lamp with uniform illumination according to claim 4, wherein:

the surface of the light-emitting surface of the condenser lens (15) corresponding to the point light source (131) is provided with a plurality of strips (151) which are parallel and vertical to the length direction of the lamp.

6. The LED lamp with uniform illumination according to claim 5, wherein:

the strip (151) forms a circle.

7. The LED lamp with uniform illumination according to claim 5, wherein:

the light emergent surface of the condensing lens (15) provided with the strip-shaped (151) is of a frosted design.

8. The LED lamp with uniform illumination according to claim 4, wherein:

one side of the circuit board (131) of the at least one light source (13) is provided with a positioning hole (133) for preventing the condenser lens (15) from being reversely arranged, and the back of the light-emitting surface of the condenser lens (15) is provided with a positioning column (153) matched with the positioning hole (133).

9. The LED lamp with uniform illumination according to claim 4, wherein:

the circuit board (131) of the at least one light source (13) is provided with mounting holes (134) formed among the point light sources (132);

an installation column (154) is arranged on the back of the light-emitting surface of the condenser lens (15), and a melting column (155) is formed at the lower end of the installation column (154);

the fusion post (155) is adapted to be inserted into the mounting hole (134) and to fuse when heated to fixedly attach the mounting post (154) to the mounting hole (134).