CN104180294A - Large-illumination angle lens and LED (light emitting diode) lamp with large-illumination angle lens - Google Patents

Abstract

The invention provides a large-illumination angle lens, which is used for emitting out light emitted by an LED (light emitting diode) light source and comprises an inner concave surface, an outer concave surface and a textured structure, wherein the inner concave surface is a hemispherical surface and is used for emitting light emitted by the LED light source into the large-illumination angle lens, the outer concave surface is arranged at the outer side of the inner concave surface and is used for emitting out light rays emitted by the LED light source, and the textured surface is connected with the inner concave surface and the outer concave surface. The invention also provides an LED lamp adopting the large-illumination angle lens. The LED lamp with the large-illumination angle lens has the advantages that the illumination angle is large, and in addition, good illumination uniformity is realized.

Description

Large lighting angle lens and there is the LED lamp of these large lighting angle lens

Technical field

The present invention relates to lighting field, relate in particular to a kind of LED lamp of being convenient to the large lighting angle lens of arbitrarily placing and thering are these large lighting angle lens.

Background technology

Existing ring type floodlight LED lamp great majority are all to utilize reflector to carry out luminous intensity distribution, yet the mode of employing reflector luminous intensity distribution can cause along the light intensity of LED optical axis direction larger, so the floodlight that reflector is allotted always there will be the light intensity of mid portion higher.For solving the higher problem of mid portion light intensity, tend to make densely covered small salient point (or shrinkage pool) structure at the exit facet of LED lamp and realize floodlight effect, also have and adopt exit facet friction treatment to realize floodlight.Yet the floodlight effect that these processing modes reach is all even not, and floodlight angle is generally less.

Summary of the invention

For the problems referred to above, the object of the present invention is to provide the uniformly large lighting angle lens of the large and floodlight of a kind of floodlight angle.

In addition, the present invention also aims to provide a kind of LED lamp of applying above-mentioned large lighting angle lens.

In order to solve the problems of the technologies described above, the invention provides a kind of large lighting angle lens, for the beam projecting for LED light source transmitting, these large lighting angle lens comprise inner concave, outer concave surface and etched surface; This inner concave is hemispherical face, for injecting this large lighting angle lens for the light of LED light source transmitting; This outer concave surface is positioned at this inner concave outside, for the light for LED light source transmitting, penetrates; This etched surface connects this inner concave and this outer concave surface; The shape of this outer concave surface designs by the following method:

This outer concave surface and goal-selling hot spot are divided into the grid of equivalent in default solid space, and the normal vector of this outer concave surface control mesh node calculates according to following formula:

$\left\{\begin{array}{c}{N}_x=\frac{A_x-B_x}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_y=\frac{A_y-B_y}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_z=\frac{A_z-B_z}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\end{array}\right.$

N＝N _xi+N _yj+N _zk；

A＝A _xi+A _yj+A _zk；A′＝B _xi+B _yj+B _zk；

Wherein, N is normal vector, and A is incident ray vector, and A ' is emergent ray vector;

And described goal-selling hot spot be evenly distributed on one with the hemisphere face of this inner concave with the centre of sphere on;

According to incident ray and emergent ray Si Nieer (snell) law, the node of grid is corresponding one by one, and the mesh point coordinate of whole outer concave surface is obtained by iterative computation, finally control mesh covering is formed to curved surface, recharge rear formation entity, obtain the shape of outer concave surface.

Wherein, described etched surface is positioned in a plane.

Wherein, the material of described large lighting angle lens is polymethyl methacrylate (PMMA).

Wherein, described etched surface is processed and is made by texture atomization.

The present invention also provides a kind of LED lamp, comprises LED light source and the large lighting angle lens that are oppositely arranged with this LED light source, and these large lighting angle lens are for the beam projecting for LED light source transmitting, and large lighting angle lens comprise inner concave, outer concave surface and etched surface; This inner concave is hemispherical face, and this LED light source is fixed in this inner concave, and this inner concave is for injecting this large lighting angle lens for the light of LED light source transmitting; This outer concave surface is positioned at this inner concave outside, for the light for LED light source transmitting, penetrates; This etched surface connects this inner concave and this outer concave surface; The shape of this outer concave surface designs by the following method:

This outer concave surface and goal-selling hot spot are divided into the grid of equivalent in default solid space, and the normal vector of this outer concave surface control mesh node calculates according to following formula:

$\left\{\begin{array}{c}{N}_x=\frac{A_x-B_x}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_y=\frac{A_y-B_y}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_z=\frac{A_z-B_z}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\end{array}\right.$

N＝N _xi+N _yj+N _zk；

A＝A _xi+A _yj+A _zk；A′＝B _xi+B _yj+B _zk;

Wherein, N is normal vector, and A is incident ray vector, and A ' is emergent ray vector;

And described goal-selling hot spot be evenly distributed on one with the hemisphere face of this inner concave with the centre of sphere on;

According to incident ray and emergent ray Si Nieer (snell) law, the node of grid is corresponding one by one, and the mesh point coordinate of whole outer concave surface is obtained by iterative computation, finally control mesh covering is formed to curved surface, recharge rear formation entity, obtain the shape of outer concave surface.

Wherein, described etched surface is positioned in a plane.

Wherein, the lighting angle scope of described LED light source is 150 °～170 °.

Wherein, the lighting angle of described LED light source is 170 °.

Wherein, the material of described large lighting angle lens is polymethyl methacrylate (PMMA).

Wherein, described etched surface is processed and is made by texture atomization.

The irradiating angle with the LED lamp of large lighting angle lens has reached 180 °, and effectively the illumination in irradiating angle is all very even, and therefore not only irradiating angle is large and have a good uniformity of illuminance for the above-mentioned LED lamp with large lighting angle lens.

Accompanying drawing explanation

In order to be illustrated more clearly in technical scheme of the present invention, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the stereogram of the large lighting angle lens that provide of embodiment of the present invention.

Fig. 2 is the cutaway view of large lighting angle lens shown in Fig. 1.

Fig. 3 is that shown in Fig. 2, large lighting angle lens are applied to the schematic diagram on LED lamp.

Fig. 4 is normal and the incident emergent ray graph of a relation of the control mesh of large lighting angle lens shown in Fig. 1.

Fig. 5 is the surface of intensity distribution of the LED lamp of large lighting angle lens shown in application drawing 1.

The specific embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

Refer to Fig. 1-3, embodiment of the present invention provides a kind of LED lamp 100, and it comprises a LED light source 10 and one and the large lighting angle lens 20 that are oppositely arranged of LED light source 10.The material of large lighting angle lens 20 is polymethyl methacrylate (PMMA), and it is for distributing the light transmission outgoing of LED light source 10 transmittings.

The lighting angle scope of LED light source 10 is 150 °～170 °.In the present embodiment, the model of LED light source 10 is that lighting angle is the OSRAM LUW W5AM3W(light efficiency of 170 °: 60lm/w).

Large lighting angle lens 20 comprise that the outer concave surface 24 of an inner concave 22, one and connects the etched surface 26 of inner concave 22 and outer concave surface 24.Inner concave 22 is hemispherical face, and LED light source 10 is fixed in inner concave 22.Outer concave surface 24 is positioned at inner concave 22 outsides, is roughly a class hemisphere face, for penetrating large lighting angle lens 20 after the light refraction for LED light source 10 transmittings.Etched surface 26 is processed and is made by texture atomization.Etched surface 26 mainly plays diffuse reflection effect, to increase the utilization rate of light and to prevent stray light.

The class hemisphere face shape of outer concave surface 24 designs by the following method:

See also Fig. 4, outer concave surface 24 and goal-selling hot spot are divided into the grid of equivalent in default solid space, the normal vector of outer concave surface 24 control mesh nodes calculates according to following formula:

$\left\{\begin{array}{c}{N}_x=\frac{A_x-B_x}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_y=\frac{A_y-B_y}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_z=\frac{A_z-B_z}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\end{array}\right.$

N＝N _xi+N _yj+N _zk；

A＝A _xi+A _yj+A _zk；A′＝B _xi+B _yj+B _zk；

Wherein, N is normal vector, and A is incident ray vector, and A ' is emergent ray vector;

And described goal-selling hot spot be evenly distributed on one with the hemisphere face of this inner concave with the centre of sphere on;

According to incident ray and emergent ray Si Nieer (snell) law, the node of grid is corresponding one by one, and the mesh point coordinate of whole outer concave surface 24 is obtained by iterative computation, finally control mesh covering is formed to curved surface, recharge rear formation entity, obtain the class spherical shape of outer concave surface 24.

While stating in the use LED lamp 100, the light that LED light source 10 produces is injected large lighting angle lens 20 by inner concave 22, and because inner concave 22 is hemispherical of rule, so the light of injecting in large lighting angle lens 20 will can not reflect and be offset.Described light penetrates large lighting angle lens 20 by outer concave surface 24 again after refraction, and the light of ejaculation be take in 180 ° of radiation scopes that inner concave 22 is the centre of sphere being radiated at.

See also Fig. 5, distribution curve flux figure from large lighting angle lens 20, the irradiating angle with the LED lamp 100 of large lighting angle lens 20 has reached 180 °, and effectively the illumination in irradiating angle is all very even, therefore not only irradiating angle is large and have a good uniformity of illuminance for the above-mentioned LED lamp 100 with large lighting angle lens 20.

The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims (10)

1. large lighting angle lens, for supplying the beam projecting of LED light source transmitting, is characterized in that, these large lighting angle lens comprise inner concave, outer concave surface and etched surface; This inner concave is hemispherical face, for injecting this large lighting angle lens for the light of LED light source transmitting; This outer concave surface is positioned at this inner concave outside, for the light for LED light source transmitting, penetrates; This etched surface connects this inner concave and this outer concave surface; The shape of this outer concave surface designs by the following method:

This outer concave surface and goal-selling hot spot are divided into the grid of equivalent in default solid space, and the normal vector of this outer concave surface control mesh node calculates according to following formula:

$\left\{\begin{array}{c}{N}_x=\frac{A_x-B_x}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_y=\frac{A_y-B_y}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_z=\frac{A_z-B_z}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\end{array}\right.$

N＝N _xi+N _yj+-N _zk；

A＝A _xi+A _yj+A _zk；A′＝B _xi+B _yj+B _zk；

Wherein, N is normal vector, and A is incident ray vector, and A ' is emergent ray vector;

And described goal-selling hot spot be evenly distributed on one with the hemisphere face of this inner concave with the centre of sphere on;

According to incident ray and emergent ray Si Nieer (snell) law, the node of grid is corresponding one by one, and the mesh point coordinate of whole outer concave surface is obtained by iterative computation, finally control mesh covering is formed to curved surface, recharge rear formation entity, obtain the shape of this outer concave surface.

2. large lighting angle lens according to claim 1, is characterized in that, this etched surface is positioned in a plane.

3. large lighting angle lens according to claim 1, is characterized in that, the material of these large lighting angle lens is polymethyl methacrylate (PMMA).

4. large lighting angle lens according to claim 1, is characterized in that, this etched surface is processed and made by texture atomization.

5. a LED lamp, comprise LED light source and the large lighting angle lens that are oppositely arranged with this LED light source, the beam projecting of these large lighting angle lens for launching for LED light source, is characterized in that, these large lighting angle lens comprise inner concave, outer concave surface and etched surface; This inner concave is hemispherical face, and this LED light source is fixed in this inner concave, and this inner concave is for injecting this large lighting angle lens for the light of LED light source transmitting; This outer concave surface is positioned at this inner concave outside, for the light for LED light source transmitting, penetrates; This etched surface connects this inner concave and this outer concave surface; The shape of this outer concave surface designs by the following method:

This outer concave surface and goal-selling hot spot are divided into the grid of equivalent in default solid space, and the normal vector of this outer concave surface control mesh node calculates according to following formula:

$\left\{\begin{array}{c}{N}_x=\frac{A_x-B_x}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_y=\frac{A_y-B_y}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\\ N_z=\frac{A_z-B_z}{\sqrt{2}\sqrt{\left|A\right|-A\·A^{\′}}}\end{array}\right.$

N＝N _xi+N _yj+N _zk；

A＝A _xi+A _yj+A _zk；A′＝B _xi+B _yj+B _zk；

Wherein, N is normal vector, and A is incident ray vector, and A ' is emergent ray vector;

And described goal-selling hot spot be evenly distributed on one with the hemisphere face of this inner concave with the centre of sphere on;

According to incident ray and emergent ray Si Nieer (snell) law, the node of grid is corresponding one by one, and the mesh point coordinate of whole outer concave surface is obtained by iterative computation, finally control mesh covering is formed to curved surface, recharge rear formation entity, obtain the shape of this outer concave surface.

6. LED lamp according to claim 5, is characterized in that, this etched surface is positioned in a plane.

7. LED lamp according to claim 5, is characterized in that, the lighting angle scope of this LED light source is 150 °～170 °.

8. LED lamp according to claim 7, is characterized in that, the lighting angle of this LED light source is 170 °.

9. LED lamp according to claim 5, is characterized in that, the material of these large lighting angle lens is polymethyl methacrylate (PMMA).

10. LED lamp according to claim 5, is characterized in that, this etched surface is processed and made by texture atomization.