CN210372943U

CN210372943U - LED lamp

Info

Publication number: CN210372943U
Application number: CN201920910832.5U
Authority: CN
Inventors: 周立树
Original assignee: Shenzhen Kongming Technology Co ltd
Current assignee: Shenzhen Kongming Technology Co ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-04-21
Anticipated expiration: 2029-06-18

Abstract

The utility model provides a LED lamp, which comprises a lamp belt, a base (3) and a shell (6); wherein, the lamp area includes the luminescence unit, the luminescence unit includes: a lens (10), a light source (11), and an aluminum substrate (12). The lens of the LED light source is combined by adopting a double-arc curved surface, and an optical lens structure with a variable angle is designed. The light is gathered to a slightly smaller angle by the circular arc curved surface near the light source surface to reduce the light loss. And then the angle optics of the target is realized by utilizing the arc surface of the far light source. Therefore, small-angle illumination can be realized under the thickness of the thin lens, and compared with the traditional single free-form surface design, the total reflection is effectively avoided, the light loss of illumination is reduced, and the illumination distance is increased.

Description

LED lamp

Technical Field

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

Background

The LED (light emitting diode) lamp has the characteristics of high efficiency, low consumption, energy conservation, environmental protection, long service life and the like, and is increasingly paid more attention by various countries in the world. The LED ceiling lamp is installed on a ceiling or a wall in an absorption or embedding manner by using an LED as a light source, and is a common indoor (such as a home, an office, an entertainment place, etc.) lighting lamp. Compared with the traditional lighting lamp, the LED lamp has the advantages of energy conservation, low carbon, long service life, good color rendering property, high response speed and the like. In the practical use of the current LED light source in the prior art, an optical lens needs to be designed for the LED light source to satisfy the requirement of uniform illumination or other illumination distribution. For example, the most widely used LED uniform LED lamp lenses in the market are mainly of two types: one is a multi-piece aspheric type, which, although having a high illuminance uniformity, increases the complexity of the optical system and the difficulty of assembly; the other is a monolithic aspheric type, which has low optical complexity but low and non-uniform illumination. And the light source and the lens are packaged together, and the heat of the light source is directly acted on the lens and is not easy to dissipate, so that the service life of the LED lamp is influenced.

SUMMERY OF THE UTILITY MODEL

In order to realize a lamp with uniform irradiation and high durability, the technical scheme provided by the embodiment of the application is as follows:

an LED lamp, characterized in that: comprises a lamp belt, a base 3 and a shell 6; wherein, the lamp area includes the luminescence unit, the luminescence unit includes: lens 10, light source 11, aluminium base board 12.

Preferably, the light sources 11 are symmetrically arranged on one surface of the aluminum substrate 12 with respect to the center line I; the lenses 10 are symmetrically arranged along the central line I; the lens 10 and the aluminum substrate 12 form a space 13.

Preferably, the inner surface of the lens forms a recess and the outer surface of the lens forms a protrusion.

Preferably, the inner surface of the lens forms a spherical depression with the inner arc R1 as a generatrix and the outer surface of the lens forms a spherical protrusion with the outer arc R2 as a generatrix.

Preferably, the height of the outer arc R2 is adjusted to form different illumination angles.

Preferably, the inner arc R1 further upwardly forms an adjustment portion 103 in the vicinity of the apex.

Preferably, the inner arc R1 is formed by a partial ellipsoid, the major axis of which is perpendicular to the height direction of the inner arc R1.

Preferably, the inner arc R1 is formed by a partial ellipsoid, the major axis of which is parallel to the height direction of the inner arc R1.

Preferably, the light strip comprises a first light strip 1, a second light strip 2; the first lamp strip 1 and the second lamp strip 2 are respectively in a semicircular ring shape; the first lamp strip 1 and the second lamp strip 2 are connected end to form a ring shape and are distributed in the shell 6; the base 3 is positioned in the center of the LED lamp and is parallel to the symmetry axis of the shell 6; a first hollow part 4 and a second hollow part 5 are symmetrically arranged at two sides of the base 3

A design method of an LED lamp comprises the following steps:

step 1), arranging a concave part on one surface of the lens and arranging a convex part on the other surface of the lens, wherein the concave part is a symmetrical spherical surface, and a bus is an inner arc R₁Height of H₁The convex part is a spherical surface, and the generatrix is an outer arc R₂Height H₂；

Step 2), arranging a light source in the center of the substrate and in the projection area of the concave part, and arranging a plurality of bulges on the lens and/or the substrate to enable the lens and the substrate to generate a gap;

step 3), fixing the inner arc R through computer simulation software₁Radius and height H of₁Adjusting H₂And obtaining the required irradiation angle of the LED lamp.

Compared with the prior art, the invention has the following beneficial effects: the first lamp strip 1 and the second lamp strip 2 are connected end to form a ring. The housing 6 is formed with a circular arc-shaped curve transition from the edge to the center. The lens of the LED light source is combined by adopting a double-arc curved surface, and an optical lens structure with a variable angle is designed. The light is gathered into a small angle through the arc curved surface close to the light source surface so as to reduce light loss, and the angle optics of the target is realized by the arc surface of the far light source. Therefore, small-angle illumination can be realized under the thickness of the thin lens, and compared with the traditional single free-form surface design, the total reflection is effectively avoided, the light loss of illumination is reduced, and the illumination distance is increased. The designed structure is simulated by adopting light simulation software, and through analysis of a simulation result, when the angle of the lens is designed to be 90 degrees and the thickness is 2.6mm, the light transmittance of the single lens is as high as 95 percent. The annular array distribution is adopted, and the uniformity of the whole annular surface light source reaches 94.4%. Compared with the traditional one-to-one illuminating mode of the light source lens, the one-to-one illuminating method improves the illuminating uniformity, and greatly reduces the thickness of the lens and the light loss.

Drawings

FIG. 1 is a top view of the present invention;

FIG. 2 is a bottom view of the present invention;

FIG. 3 is a side view of the present invention;

fig. 4 is a schematic view of a light strip of the present invention;

fig. 5 is a schematic view of two parallel light strips according to the present invention;

FIG. 6 is a diagram of a light-emitting unit according to a first embodiment of the present invention;

fig. 7 is a light path diagram of a light emitting unit according to a first embodiment of the present invention;

FIG. 8 is a light path diagram of a 90 illumination angle according to the present invention;

FIG. 9 is a light path diagram of a 120 illumination angle of the present invention;

FIG. 10 is a structural view of a second embodiment of the present invention;

FIG. 11 is a block diagram of a third embodiment of the present invention;

fig. 12 is a structural view of a fourth embodiment of the present invention.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings and the detailed description.

As shown in fig. 1-2, the LED lamp of the present invention includes a first lamp strip 1, a second lamp strip 2, a base 3, a first hollow portion 4, a second hollow portion 5, a housing 6, a power line 7, and a fixing portion 8.

The first lamp strip 1 and the second lamp strip 2 are respectively in a semicircular ring shape. The first lamp strip 1 and the second lamp strip 2 are connected end to form a ring shape and are distributed inside the shell 6. The base 3 is located in the center of the LED lamp and parallel to the axis of symmetry of the housing 6. The light emitting units forming the first lamp strip and the second lamp strip are LEDs. A plurality of LEDs are arranged in an array to form the lamp strip. The number of LEDs can be freely set as desired. The light emitted by the first lamp strip 1 and the second lamp strip 2 is circular, so that the lamp is more uniform and attractive.

The two ends of the base 3 are fixedly connected with the shell 6. The two sides of the base 3 are symmetrically provided with a first hollow part 4 and a second hollow part 5. The first hollow portion 4 and the second hollow portion 5 are each a hollow region and are formed in an inner region of the housing 6. The hollow areas formed in the housing 6 by the first hollow-out portion 4 and the second hollow-out portion 5 can allow air to circulate, and reduce the weight of the housing.

The driving circuits of the first lamp strip 1 and the second lamp strip 2 are positioned in the base 3. The power cord 7 is electrically connected with the driving circuit in the base 3 and provides power for the LED lamp. The drive circuit is arranged in the base 3 and is electrically connected with the first lamp strip 1 and the second lamp strip 2.

The cross-sectional shapes of the first hollow-out portion 4 and the second hollow-out portion 5 may be circular, oval, triangular, square, rectangular or polygonal. One skilled in the art can select one or a combination of several shapes according to design requirements.

The power cord 7 and the fixing portion 8 are provided on the base 3. The fixing portion 8 can be one of a screw, a hook and a hanging ring or other common fixing devices to fix the LED lamp to a work surface, such as a ceiling.

As shown in fig. 3, the housing 6 is formed in a curved transition of a circular arc shape from the edge to the center. In the ceiling-mounted position, the edge of the housing 6 extends downward so as to be closer to the ground in the vertical direction than the horizontal positions of the first and second light strips 1, 2. The edge structure will block some of the scattered light so that the user will not feel dazzling when looking at the edge structure from the side, and the lighting effect will be better. The material of the shell 6 can be plastic or metal. In addition, the arc-shaped edge is beneficial to cleaning, is not easy to store dirt and is suitable for some specific places such as food processing places and the like. The arc-shaped edge enables the shell 6 to form a curved surface, and the touch feeling when the LED lamp is taken is improved. The profile of base 3 is the arc, forms handle form, has unique aesthetic feeling when conveniently installing taking.

In the ceiling-mounted position, the edge of the housing 6 extends downward so as to be closer to the ground in the vertical direction than the horizontal positions of the first and second light strips 1, 2. The edge structure can block some scattered light, so that a user can not generate dazzling glare when looking from the side, and the lighting effect is better. The LED lamp has the light transmittance of over 95 percent, and realizes the traditional point-to-point light emission and point-to-face light emission. The semi-circular appearance of the invention saves more material and has lighter weight than the traditional structure.

As shown in fig. 4-5, the light strip 1 of the present invention may comprise one light strip or a plurality of light strips, for example, two light strips arranged in parallel. Each lamp strip is composed of a light emitting unit. The light emitting unit comprises a lens, a light source and an aluminum substrate. A plurality of single lenses can be molded to form an integral lens module with a plurality of lenses, and the lens module can be designed into a single lens module, a 3-in-1 lens module, a 5-in-1 lens module or even a dozen lens modules according to different requirements; the design can effectively save the production cost, save the space of the LED lamp mechanism, and realize the characteristics of high power and the like more easily.

The first embodiment is as follows:

as shown in fig. 6, the light emitting unit of the light strip 1 of the present invention includes a lens 10, a light source 11, and an aluminum substrate 12. The light sources 11 are symmetrically disposed on one surface of the aluminum substrate 12 about the center line I. The lens 10 and the aluminum substrate 12 form a space 13. The spacers 13 form channels for the heat conduction of the light source. The heat conducting channel can timely discharge the heat of the light source, so that the LED lamp is suitable for scenes adopting high-power light sources. Furthermore, the motor can be connected with the fan to blow air into the heat conduction channel, so that the air flow in the heat conduction channel is accelerated, and the heat dissipation effect is improved. Several protruding support structures may be provided between the lens 10 and the aluminum substrate 12 to form the gap 13, which is well known in the art and will not be described herein. The inner surface of the lens is in an inner arc R₁Forming spherical depressions for the generatrices, the outer surface of the lens being in the form of an arc R₂Forming a spherical protrusion for the bus bar. The remaining parts of the lens except the spherical depressions and the spherical protrusions are plate-shaped and parallel to the aluminum substrate 12.

The lens material may be a transparent engineering plastic such as Polycarbonate (PC) or Polymethylmethacrylate (PMMA). Preferably, the embodiment is injection molded from a selected polymethylmethacrylate. This can make the lens high in light transmittance. The PMMA material adopted in the invention is a high-transparent amorphous thermoplastic polymer, and the relative density (30 ℃/4 ℃) is 1.188-1.22. The glass has high transparency, the light transmittance is 90-92%, the glass is higher than inorganic glass, the ultraviolet light can be transmitted by 73.5%, and the refractive index is 1.49; meanwhile, the mechanical strength is high, the toughness is good, the tensile strength is 60-75MPa, the impact strength is 12-13kJ/m, and the mechanical strength is 8-10 times higher than that of inorganic glass. Can be stretched and oriented, and the impact strength is improved by 1.5 times. Has excellent ultraviolet ray and atmospheric ageing resistance.

Inner surface structure design and calculation of lens：

Since the light source 3030 is mainly used as the light source, the light distribution calculation is mainly based on the 3030 light source. Secondly, in order to be compatible with a 5050 light source, enough space needs to be reserved below the lens to plug the 5050 light source, namely the size calculation of the lens is mainly performed on the 5050 light source, and the light distribution calculation is mainly performed on the 3030 light source.

The thickness of the aluminum substrate is 1.5mm, the size specification of 5050 lamp bead is 5 multiplied by 0.7mm, the size specification of 3030 lamp bead is 3 multiplied by 0.52mm, so that the depth of the concave part of the lens is 2mm, and the fixed distance of the inner ring of the lens is L₁The unilateral distance from the 5050 source is 0.5mm, 6 mm. The refractive index n of the lens material is inquired₂1.58, where the inner arc R of the lens₁For fixed data (also for possible co-moulding), 3030 the height of the light source is 0.52mm, so the inner arc R₁Height H₁＝1.6mm(H₁0.02-1.58), one in order to keep sufficient distance to prevent the heat generated by the 5050 lamp bead from reaching the lens, and secondly in order to better calculate the optics of the lens, so far the design of the inner surface of the lens is completed. Outer arc of lens R₂Width L of₂Is a constant value, L₂＝7.58mm(L₂-L₁1.58), so R₂≥L₂/2。

Optical calculation of the outer surface of a lens：

The refractive index n1 of air is approximately equal to 1.00 according to the data, and the air is transparentThe refractive index n2 of the mirror material ≈ 1.58. As can be seen from FIG. 7, the light from the lens is refracted twice, and the initial angle r of the light emitted from the light source₀Through the inner arc R₁Is refracted to R₂The arc is refracted into the air again, and forms an angle r with the center line₀' is the angle we need;

for arc R, known from Snell's law₁：

Sinα₁/sinβ₁＝n₂/n₁

For arc R₂：

Sinα₂/sinβ₂＝n₁/n₂

This makes it possible to obtain:

Sinα₁/sinβ₁＝Sinβ₂/sinα₂

namely:

Sinα₁sinα₂＝sinβ₁Sinβ₂

the product of the sine of the incident light is equal to the product of the sine of the refracted light.

Thus, Sin α shows the lens of this type₁And sin β₁The value is constant and the incident angle α₂Angle of refraction β₂Proportional relationship, i.e. angle of incidence α₂Only with the circular arc R₂Is related to the size of the arc R₂≥L₂3.79 mm/2, and the angle of refraction β is found by analysis₂The smaller, the lens angle r we need to be₀The larger the' x 2; namely r₀' and R₂Is in positive correlation with the magnitude of R₂Is only equal to the height H₂Related to and with H₂Forming a negative correlation relationship; so height H₂↓r₀') @; at this time, the optical properties were simulated by TracePro, by modifying H₂The required irradiation angles of 60 degrees, 90 degrees, 120 degrees and the like, namely r can be obtained through a plurality of experiments₀' are 30 °, 45 °, 60 °, respectively. As shown in fig. 8-9, a schematic view of 90 °, 120 ° illumination angles is given. Circular arc R₂Height H of₂The larger the emergent ray passing through the lens to deviate from the center lineThe smaller the angle I, the more the angle I is emitted. Circular arc R₂Height H of₂The smaller the exit ray through the lens exits at a larger angle from the centerline I.

Example two:

as shown in fig. 10, the difference between the first embodiment and the second embodiment is that the inner arc R is₁An adjusting portion 103 is further formed upward in the vicinity of the vertex, and the rest is the same as in the first embodiment. The adjusting part is also arranged symmetrically with the central line I to form a spherical surface. The spherical surface forming the layer adjusting part 103 has a radius R₃And height H₃(not shown in fig. 10). Radius R₃And height H₃Can be adjusted in the simulation software to obtain the required illumination angle. The spherical surface can further refract light rays near the center line I into the lens 10. In this way the arc R can be adjusted₁And the light path near the central line I of the lens enables the light rays emitted from the top of the lens to be further converged near the central line I, so that the irradiation intensity of the light source is improved.

Example three:

as shown in fig. 11, the difference between the first embodiment and the second embodiment is that the inner arc R is₁Formed by a part of an ellipsoid, the rest being identical to the first embodiment. The major axis of the ellipsoid being perpendicular to the inner arc R₁In the height direction of the base. Inner arc R formed by incident light passing through ellipsoid₁And arc R₂And (5) refracting twice. Adjusting inner arc R₁Height of (d) and major and minor axis lengths of the ellipse and the arc R₂The radius and the height can make emergent ray produce the rectangle facula, eliminate the shadow between the single light source in lamp area, improve the illumination degree of consistency in lamp area.

Example four:

as shown in fig. 12, the difference between the first embodiment and the second embodiment is that the inner arc R is₁Formed by a part of an ellipsoid, the rest being identical to the first embodiment. The major axis of the ellipsoid being parallel to the inner arc R₁In the height direction of the base. Adjusting inner arc R₁Height of (d) and major and minor axis lengths of the ellipse and the arc R₂The radius and the height can make emergent ray produce square facula, improve the illumination degree of consistency in lamp area.

It will be understood that 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 be present. Parts of the invention not described in detail are within the common general knowledge of a person skilled in the art.

The above examples mainly illustrate preferred embodiments of the present invention. Although only a few embodiments of the present invention have been described, those skilled in the art will appreciate that the present invention may be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. An LED lamp, characterized in that: comprises a lamp belt, a base (3) and a shell (6); wherein, the lamp area includes the luminescence unit, the luminescence unit includes: a lens (10), a light source (11), and an aluminum substrate (12); the light source (11) is symmetrically arranged on one surface of the aluminum substrate (12) by a central line I; the lenses (10) are symmetrically arranged along the central line I; the lens (10) and the aluminum substrate (12) form a gap (13).

2. The LED light fixture of claim 1 wherein: the inner surface of the lens forms a concave part, and the outer surface of the lens forms a convex part.

3. The LED light fixture of claim 2 wherein: the inner surface of the lens is in an inner arc R₁Forming spherical depressions for the generatrices, the outer surface of the lens being other than the outer arc R₂Forming a spherical protrusion for the bus bar.

4. The LED light fixture of claim 3 wherein: adjusting outer arc R₂Forming different illumination angles.

5. The LED light fixture of claim 3 wherein: inner arcR₁An adjusting portion (103) is further formed upward in the vicinity of the apex.

6. The LED light fixture of claim 3 wherein: inner arc R₁Formed by part of an ellipsoid, the major axis of which is perpendicular to the inner arc R₁In the height direction of the base.

7. The LED light fixture of claim 3 wherein: inner arc R₁Formed by part of an ellipsoid, the major axis of which is parallel to the inner arc R₁In the height direction of the base.

8. The LED light fixture of claim 1 wherein: the lamp strip comprises a first lamp strip (1) and a second lamp strip (2); the first lamp strip (1) and the second lamp strip (2) are respectively in a semicircular ring shape; the first lamp strip (1) and the second lamp strip (2) are connected end to form a ring shape and are distributed in the shell (6); the base (3) is positioned in the center of the LED lamp and is parallel to the symmetry axis of the shell (6); the two sides of the base (3) are symmetrically provided with a first hollow-out part (4) and a second hollow-out part (5).