CN104180294B - 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

Big lighting angle lens and the LED with this big lighting angle lens

Technical field

The present invention relates to lighting field, more particularly, to a kind of big lighting angle lens being easy to arbitrarily place and to have this big The LED of lighting angle lens.

Background technology

Existing ring type floodlight LED great majority are all to carry out luminous intensity distribution using reflector, however, adopting reflector luminous intensity distribution Mode can lead to larger along the axial light intensity of LED light, the floodlight that therefore reflector is allotted always occurs mid portion Light intensity is higher.Higher for solving the problems, such as mid portion light intensity, often the exit facet in LED makes densely covered small salient point （Or shrinkage pool）Structure, to realize floodlight effect, also has and realizes floodlight using exit facet friction treatment.But these processing modes The floodlight effect reaching is all not uniform, and floodlight angle is typically small.

Content of the invention

For the problems referred to above, it is an object of the invention to provide a kind of floodlight angle is big and floodlight uniformly big lighting angle Lens.

Additionally, the present invention also aims to providing a kind of LED applying above-mentioned big lighting angle lens.

In order to solve above-mentioned technical problem, the invention provides a kind of big lighting angle lens, for launching for LED light source Beam projecting, this big lighting angle lens includes inner concave, outer concave surface and etched surface；This inner concave is hemispherical face, is used for Light for LED light source transmitting injects this big lighting angle lens；This outer concave surface is located at outside this inner concave, for supplying LED light The light of source transmitting projects；This etched surface connects this inner concave and this outer concave surface；The shape of this outer concave surface sets by the following method Meter：

This outer concave surface and goal-selling hot spot are divided in default solid space the grid of equivalent, this outer concave surface controls The normal vector of grid node calculates according to below equation：

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

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 is evenly distributed on one with this inner concave with the hemisphere face of the centre of sphere；

According to incident ray and emergent ray Si Nieer（snell）Law, the node of grid is corresponded, entirely outer recessed The mesh point coordinate in face is obtained by iterative calculation, grid eyelid covering finally will be controlled to form curved surface, form entity, obtain after refilling Shape to outer concave surface.

Wherein, described etched surface is located in a plane.

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

Wherein, described etched surface is made by texture atomization process.

The present invention also provides a kind of LED, including LED light source and saturating with the big lighting angle that this LED light source is oppositely arranged Mirror, this big lighting angle lens is used for the beam projecting for LED light source transmitting, and big lighting angle lens include inner concave, outer recessed Face 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 used for supplying LED light source The light of transmitting injects this big lighting angle lens；This outer concave surface is located at outside this inner concave, for the light launched for LED light source Line projects；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 in default solid space the grid of equivalent, this outer concave surface controls The normal vector of grid node calculates according to below equation：

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

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 is evenly distributed on one with this inner concave with the hemisphere face of the centre of sphere；

According to incident ray and emergent ray Si Nieer（snell）Law, the node of grid is corresponded, entirely outer recessed The mesh point coordinate in face is obtained by iterative calculation, grid eyelid covering finally will be controlled to form curved surface, form entity, obtain after refilling Shape to outer concave surface.

Wherein, described etched surface is located 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 big lighting angle lens is polymethyl methacrylate（PMMA）.

Wherein, described etched surface is made by texture atomization process.

The irradiating angle with the LED of big lighting angle lens has reached 180 °, and the photograph in effective illuminated angle Degree is all very uniform, and not only irradiating angle is big and to have good illumination equal for the therefore above-mentioned LED with big lighting angle lens Evenness.

Brief description

In order to be illustrated more clearly that technical scheme, below by the accompanying drawing work to use required in embodiment Simply introduce it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the axonometric chart of the big lighting angle lens that embodiment of the present invention provides.

Fig. 2 is the sectional view of big lighting angle lens shown in Fig. 1.

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

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

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

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 carried out clear, complete Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work Embodiment, broadly falls into the scope of protection of the invention.

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

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

Big lighting angle lens 20 include an inner concave 22, an outer concave surface 24 and connects inner concave 22 and outer concave surface 24 Etched surface 26.Inner concave 22 is hemispherical face, and LED light source 10 is fixed in inner concave 22.Outer concave surface 24 is located at outside inner concave 22 Side, is in substantially a class hemisphere face, and the light for launching for LED light source 10 projects big lighting angle lens 20 after reflecting.Texture Face 26 is made by texture atomization process.Etched surface 26 acts primarily as diffuse reflection effect, to increase the utilization rate of light and to prevent spuious Light affects.

The class semi-spherical 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 in default solid space the net of equivalent Lattice, outer concave surface 24 controls the normal vector of grid node to be calculated according to below equation：

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

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 is evenly distributed on one with this inner concave with the hemisphere face of the centre of sphere；

According to incident ray and emergent ray Si Nieer（snell）Law, the node of grid is corresponded, entirely outer recessed The mesh point coordinate in face 24 is obtained by iterative calculation, grid eyelid covering finally will be controlled to form curved surface, form entity after refilling, Obtain the class spherical shape of outer concave surface 24.

When using above-mentioned LED 100, the light that LED light source 10 produces injects big lighting angle lens by inner concave 22 20, due to inner concave 22 be rule hemispherical face, therefore inject the light in big lighting angle lens 20 will not reflect and Skew.Described light projects big lighting angle lens 20 by outer concave surface 24 again after refraction, within the light of injection will be radiated at Concave surface 22 is in 180 ° of radiation scopes of the centre of sphere.

See also Fig. 5, knowable to the distribution curve flux figure of big lighting angle lens 20, there are big lighting angle lens 20 The irradiating angle of LED 100 reached 180 °, and the illumination in effective illuminated angle is all very uniform, and therefore above-mentioned have Not only irradiating angle is big and has good uniformity of illuminance for the LED 100 of big lighting angle lens 20.

The above is the preferred embodiment of the present invention it is noted that for those skilled in the art For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as Protection scope of the present invention.

Claims (10)

1. a kind of big lighting angle lens, for the beam projecting launched for LED light source, this big lighting angle lens includes indent Face, outer concave surface and etched surface；This inner concave is hemispherical face, and the light for launching for LED light source injects this big lighting angle Lens；This outer concave surface is located at outside this inner concave, and the light for launching for LED light source projects；This etched surface connects this indent Face and this outer concave surface；It is characterized in that, the shape of this outer concave surface designs by the following method：

This outer concave surface and goal-selling hot spot are divided in default solid space the grid of equivalent, this outer concave surface controls grid The normal vector of node calculates according to below equation：

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

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 is evenly distributed on one with this inner concave with the hemisphere face of the centre of sphere；

According to incident ray and emergent ray Si Nieer (snell) law, the node of grid is corresponded, entirely outer concave surface Mesh point coordinate is obtained by iterative calculation, grid eyelid covering finally will be controlled to form curved surface, form entity, be somebody's turn to do after refilling The shape of outer concave surface.

2. big lighting angle lens according to claim 1 are it is characterised in that this etched surface is located in a plane.

3. big lighting angle lens according to claim 1 are it is characterised in that the material of this big lighting angle lens is poly- Methyl methacrylate (PMMA).

4. big lighting angle lens according to claim 1 are it is characterised in that this etched surface passes through texture atomization process system Become.

5. a kind of LED, the big lighting angle lens be oppositely arranged including LED light source and with this LED light source, this big lighting angle Lens are used for the beam projecting for LED light source transmitting, and this big lighting angle lens includes inner concave, outer concave surface and etched surface；Should Inner concave is hemispherical face, and this LED light source is fixed in this inner concave, and this inner concave is used for penetrating for the light of LED light source transmitting Enter this big lighting angle lens；This outer concave surface is located at outside this inner concave, and the light for launching for LED light source projects；This is stung Flower face connects this inner concave and this outer concave surface；It is characterized in that, the shape of this outer concave surface designs by the following method：

This outer concave surface and goal-selling hot spot are divided in default solid space the grid of equivalent, this outer concave surface controls grid The normal vector of node calculates according to below equation：

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

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 is evenly distributed on one with this inner concave with the hemisphere face of the centre of sphere；

According to incident ray and emergent ray Si Nieer (snell) law, the node of grid is corresponded, entirely outer concave surface Mesh point coordinate is obtained by iterative calculation, grid eyelid covering finally will be controlled to form curved surface, form entity, be somebody's turn to do after refilling The shape of outer concave surface.

6. LED according to claim 5 is it is characterised in that this etched surface is located in a plane.

7. LED according to claim 5 it is characterised in that this LED light source lighting angle scope be 150 °～ 170°.

8. LED according to claim 7 is it is characterised in that the lighting angle of this LED light source is 170 °.

9. LED according to claim 5 is it is characterised in that the material of this big lighting angle lens is polymethyl Sour methyl ester (PMMA).

10. LED according to claim 5 is it is characterised in that this etched surface is made by texture atomization process.