CN206280919U - light emitting device - Google Patents

Abstract

The application discloses a light-emitting device, including light source and lens. The light emitted by the light source is divided into main area light and side area light. The lens is provided with a light outlet part and a light inlet part, and the light inlet part is provided with an accommodating space. The light source is arranged in the accommodating space, the light inlet part is provided with a central area and an edge area, the central area receives light rays of the main area, the edge area is connected with the central area and corresponds to light rays of the side area, the edge area is provided with a plurality of connected wedge-shaped structures which are arranged in sequence from inside to outside, and each wedge-shaped structure is provided with a light inlet surface and a reflecting surface. The light rays of the side area are incident from the light incident surface of each wedge-shaped structure, reflected by the reflecting surface corresponding to each light incident surface and emergent from the light emergent part. The vertical distance between the lower end tip of the light incident surface of the wedge-shaped structure farthest from the central area and the plane provided with the light source is the shortest, and the vertical distance between the lower end tip of the light incident surface of each other wedge-shaped structure and the plane is reduced along with the increase of the distance between each wedge-shaped structure and the central area.

Description

light emitting device

technical field

The invention relates to a lighting device, in particular to a light emitting device with a lens.

Background technique

Light Emitting Diodes (LEDs) are widely used in daily life due to their advantages of long life, low power consumption, and low heat generation. Among them, lighting applications are the most common.

Generally speaking, when light-emitting diodes are used in light-emitting devices (such as lamps), due to the needs of some optical characteristics, such as collimating and concentrating light or uniformly scattering light, it is necessary to combine a secondary optical lens with an optical structure with the The light-emitting diodes are packaged together, so that the desired optical properties of the light-emitting device can be achieved. However, the secondary optical lens often having an optical structure will determine the overall thickness of the light emitting device.

Therefore, how to provide a light-emitting device with a thin lens having the known effects of collimating and concentrating or uniformly scattering light is one of the current important issues.

Contents of the invention

This application provides a light emitting device, including a light source and a lens.

The light emitted by the light source is divided into main area light and side area light. The lens has a light exit portion and a light entry portion, and the light entry portion has an accommodating space. The light source is arranged in the accommodating space, and the light incident part has a central area and an edge area, the central area receives the main area light, and the edge area connects the central area and corresponds to the side area light, and the edge area has a plurality of connected wedge-shaped structures. Arranged in sequence from inside to outside, and each wedge-shaped structure has a light incident surface and a reflective surface. The light in the side area is incident on the light incident surface of each wedge-shaped structure, is reflected by the corresponding reflective surface of each light incident surface, and exits from the light exit portion. The vertical distance between the lower tip of the light incident surface of the wedge-shaped structure farthest from the central area and the plane where the light source is set is the shortest, while the vertical distances between the lower tip of the light incident surface of other wedge-shaped structures and the plane will vary with each wedge-shaped structure. Decreases with increasing distance from the central area.

In one embodiment, the lens further includes a plurality of microstructures, and the light incident part or the light exit part at least partially has these microstructures.

The present application also provides a light emitting device, including a light source and a lens.

The light emitted by the light source is divided into main area light and side area light. The lens has a light exit portion and a light entry portion, and the light entry portion has an accommodating space. The light source is arranged in the accommodating space, and the light incident part has a central area and an edge area, the central area receives the main area light, and the edge area connects the central area and corresponds to the side area light, and the edge area has a plurality of connected wedge-shaped structures. Arranged in sequence from inside to outside, and each wedge-shaped structure has a light incident surface and a reflective surface. The light in the side area is incident on the light incident surface of each wedge-shaped structure, is reflected by the corresponding reflective surface of each light incident surface, and exits from the light exit portion. The vertical distance between the lower tip of the light incident surface of the wedge-shaped structure farthest from the central area and the plane where the light source is placed is the shortest, while the vertical distances between the lower tip of the light incident surface of other wedge-shaped structures and the plane are the same.

In one embodiment, the lens further includes a plurality of microstructures, and the light incident part or the light exit part at least partially has these microstructures.

In one embodiment, the light exit part is a plane, a curved surface, a concave surface, a convex surface, a micro lens surface, a pizza surface, a micropizza surface, an atomized surface or an irregular surface.

This case also provides a light emitting device, including a light source and a lens.

The light emitted by the light source is divided into main area light and side area light. The lens has a light exit portion and a light entry portion, and the light entry portion has an accommodating space. The light source is arranged in the accommodating space, and the light incident part has a central area and an edge area, the central area receives the main area light, and the edge area connects the central area and corresponds to the side area light, and the edge area has a plurality of connected wedge-shaped structures. Arranged in sequence from inside to outside, and each wedge-shaped structure has a light incident surface and a reflective surface. The light in the side area is incident on the light incident surface of each wedge-shaped structure, is reflected by the corresponding reflective surface of each light incident surface, and exits from the light exit portion. The vertical distance between the sharp point of the lower end of the light incident surface of the wedge-shaped structure farthest from the central area and the plane where the light source is set is the shortest, while the vertical distances between the sharp points of the lower end of the light incident surface of the other wedge-shaped structures and the plane will vary with each wedge-shaped structure. The distance between the structure and the central area increases firstly and then decreases.

In one embodiment, the lens further includes a plurality of microstructures, and the light incident part or the light exit part at least partially has these microstructures.

This case further provides a light emitting device, including a light source and a lens.

The light emitted by the light source is divided into main area light and side area light. The lens has a light exit portion and a light entry portion, and the light entry portion has an accommodating space. The light source is arranged in the accommodating space, and the light incident part has a central area and an edge area, the central area receives the main area light, and the edge area connects the central area and corresponds to the side area light, and the edge area has a plurality of connected wedge-shaped structures. Arranged in sequence from inside to outside, and each wedge-shaped structure has a light incident surface and a reflective surface. The light in the side area is incident on the light incident surface of each wedge-shaped structure, is reflected by the corresponding reflective surface of each light incident surface, and exits from the light exit portion. The vertical distance between the sharp point of the lower end of the light incident surface of the wedge-shaped structure farthest from the central area and the plane where the light source is set is the shortest, while the vertical distances between the sharp points of the lower end of the light incident surface of the other wedge-shaped structures and the plane will follow the distance of each wedge-shaped structure. As the distance between the structure and the central area increases, it first increases and then stays the same.

In one embodiment, the lens further includes a plurality of microstructures, and the light incident part or the light exit part at least partially has these microstructures.

In one embodiment, the light exit part is a plane, a curved surface, a concave surface, a convex surface, a micro lens surface, a pizza surface, a micropizza surface, an atomized surface or an irregular surface.

Description of drawings

FIG. 1 is a three-dimensional schematic view of the light emitting device of the present invention.

Fig. 2 is a schematic diagram of partial explosion of the light emitting device of the present invention.

3A to 3C are schematic cross-sectional views of FIG. 1 .

3D to 3F are schematic cross-sectional views of another form of the lens of the present invention.

FIG. 4 is a schematic cross-sectional view of another embodiment of the lens of the present invention.

detailed description

A light emitting device according to a preferred embodiment of the present application will be described below with reference to related drawings. The same components will be described with the same reference symbols. In order to make the drawings concise, components not directly related to this case will be omitted and not drawn.

Please refer to FIG. 1, FIG. 2, and FIG. 3A to FIG. 3C at the same time. FIG. 1 is a three-dimensional schematic diagram of the light emitting device 1 of this case, FIG. 2 is a partial explosion schematic diagram of the light emitting device 1 of this case, and FIG. 3A to FIG.

In this embodiment, the light emitting device 1 includes a light source 12 and a lens 13 . In addition, the lighting device 1 further includes a base plate 10 on which the lens 13 and the light source 12 are disposed, and the base plate 10 can be a circuit board. The matching light emitting device 1 can be a directional lamp, such as a Par lamp, an MR16 lamp, or a downlight.

As shown in FIG. 2 and FIG. 3A , the lens 13 has a light incident portion 13A and a light exit portion 13B, and the light incident portion 13A has an accommodating space for accommodating the light source 12 . In this way, the light emitted by the light source 12 is collimated by the lens 13 and leaves the light emitting device 1 .

The light emitted by the light source 12 is divided into the main area light and the side area light, and in order to correspond to the main area light and the side area light of the light source 12 , the light incident portion 13A of the lens 13 has a central area 131 and an edge area 132 . The central area 131 receives the main area light, and the edge area 132 is connected to the central area 131 and corresponds to the side area light. Wherein, the rays in the main area and the rays emitted perpendicularly to the light source 12 include rays within a preset angle range. In some embodiments, the preset angle is 20-50 degrees. It should be added that the "light emitted vertically from the light source" described here is defined as the light emitted from the center of each light source.

In addition, the edge area 132 has a plurality of connected wedge-shaped structures W arranged sequentially from inside to outside, and each wedge-shaped structure has a light incident surface 132A and a reflective surface 132B. Light in the side area is incident on the light incident surface 132A of each wedge-shaped structure W, reflected by the corresponding reflective surface 132B of each light incident surface 132A, and exits from the light exit portion 13B.

As shown in FIG. 3A and FIG. 3B , the vertical distance _h41 of the lower end point of the light incident surface 132A of the wedge-shaped structure W4 farthest from the central region 131 is the shortest, while the distance _h41 of the lower end point of the light incident surface 132A of other wedge-shaped structures W is the shortest. The vertical distance h decreases as the distance between each wedge-shaped structure W and the central region 131 increases. Wherein, the vertical distance h of the lower tip of the light incident surface 132A refers to the vertical distance between the lower tip of the light incident surface 132A of each wedge-shaped structure W and the plane where the light source 12 is disposed. The plane here can be the bottom plate 10 of this embodiment.

Specifically, the vertical distances h ₁₁ , h ₂₁ , h ₃₁ , and h ₄₁ of the sharp points at the lower end of the light-incident surface 132A of each wedge-shaped structure W ₁ , W ₂ , W ₃ , and W ₄ will vary with each wedge-shaped structure W ₁ . _{. _ _ _ _ _ _} The vertical distances h ₂₁ , h ₃₁ between the sharp points at the lower end of the light surface 132A gradually decrease, and the vertical distance h ₄₁ between the sharp points at the lower end of the outermost wedge-shaped structure W ₄ on the light incident surface 132A is the smallest. Therefore, the relationship between the vertical distances h ₁₁ , h ₂₁ , h ₃₁ , and h ₄₁ of the sharp points at the lower ends of the light incident surfaces 132A of the wedge-shaped structures W ₁ , W ₂ , W ₃ , and W ₄ in this embodiment is: h ₁₁ > h ₂₁ >h ₃₁ >h ₄₁ .

This case further provides different forms of the vertical distances of the sharp points at the lower ends of the light-incident surfaces of the wedge-shaped structures of the lens; the following illustrations are illustrated in FIGS. 3D to 3F . As shown in FIG. 3D , in this embodiment, the vertical distance _h42 of the apex at the lower end of the light-incident surface 142A of the wedge-shaped structure W ₄ farthest from the central region 141 is the shortest, while the other wedge-shaped structures W at the lower end of the light-incident surface 142A are the shortest. The vertical distance h of the cusps are all the same. Wherein, the vertical distance h of the lower tip of the light incident surface 142A refers to the vertical distance between the lower tip of the light incident surface 142A of each wedge-shaped structure W and the plane where the light source 12 is disposed. The plane here can be the bottom plate 10 of this embodiment.

Specifically, the vertical distance h ₄₂ of the lower tip of the light incident surface 142A of the wedge-shaped structure W ₄ is the shortest, while the vertical distance h ₁₂ of the lower tip of the light incident surface 142A of the other wedge-shaped structures W ₁ , W ₂ , and W ₃ , h ₂₂ , and h ₃₂ are the same, that is to say, the vertical distance h12 between the sharp points at the lower end of the light-incident surface 142A of the innermost wedge-shaped structure W ₁ will be equal to the vertical distance between the sharp points at the lower end of the light-incident surface 142A of the wedge-shaped structures W ₂ and W ₃ The distances h ₂₂ and h ₃₂ are larger than the vertical distance h ₄₂ of the lower tip of the light incident surface 142A of the outermost wedge-shaped structure W ₄ . Therefore, the relationship between the vertical distances h ₁₂ , h ₂₂ , h ₃₂ , and h ₄₂ of the sharp points at the lower ends of the light incident surfaces 142A of the wedge-shaped structures W ₁ , W ₂ , W ₃ , and W ₄ in this embodiment is: h ₁₂ = h ₂₂ =h ₃₂ >h ₄₂ .

As shown in FIG. 3E , in this embodiment, the vertical distance _h43 of the apex at the lower end of the light-incident surface 152A of the wedge-shaped structure W ₄ farthest from the central region 151 is the shortest, while the other wedge-shaped structures W at the lower end of the light-incident surface 152A are the shortest. The vertical distance h of the cusp first increases and then decreases as the distance between each wedge-shaped structure W and the central region 151 increases. Wherein, the vertical distance h of the lower tip of the light incident surface 152A refers to the vertical distance between the lower tip of the light incident surface 152A of each wedge-shaped structure W and the plane where the light source 12 is disposed. The plane here can be the bottom plate 10 of this embodiment.

Specifically, the vertical distance h ₄₃ of the lower tip of the light incident surface 152A of the wedge-shaped structure W ₄ is the shortest, while the vertical distance h ₁₃ of the lower tip of the light incident surface 152A of the other wedge-shaped structures W ₁ , W ₂ , and W ₃ , h ₂₃ , h ₃₃ will first increase and then decrease with the increase of the distance between each wedge _- shaped structure W and the central area 151, that is to say, the vertical distance h ₄₃ is the shortest, and the vertical distance h ₁₃ of the lower tip of the innermost wedge-shaped structure W ₁ light incident surface 152A is smaller than the vertical distance h ₂₃ of the lower tip of the wedge-shaped structure W ₂ light incident surface 152A; and the wedge-shaped structure W ₂ is in The vertical distance h ₂₃ of the cusp at the lower end of the light surface 152A is also greater than the vertical distance h ₃₃ of the cusp at the lower end of the wedge-shaped structure W ₃ on the light incident surface 152A. Therefore, the relationship between the vertical distances h ₁₃ , h ₂₃ , h ₃₃ , and h ₄₃ of the sharp points at the lower ends of the light incident surfaces 152A of the wedge-shaped structures W ₁ , W ₂ , W ₃ , and W ₄ in this embodiment is: h ₄₃ < h ₁₃ <h ₃₃ <h ₂₃ or h ₄₃ <h ₃₃ <h ₁₃ <h ₂₃ .

As shown in FIG. 3F , in this embodiment, the vertical distance _h44 of the apex at the lower end of the light-incident surface 162A of the wedge-shaped structure W ₄ farthest from the central region 161 is the shortest, while the other wedge-shaped structures W are at the lower end of the light-incident surface 162A. The vertical distance h of the cusp first increases and then becomes flat as the distance between each wedge-shaped structure W and the central region 161 increases. Wherein, the vertical distance h of the lower tip of the light incident surface 162A refers to the vertical distance between the lower tip of the light incident surface 162A of each wedge-shaped structure W and the plane where the light source 12 is disposed. The plane here can be the bottom plate 10 of this embodiment.

Specifically, the vertical distance h ₄₄ of the lower tip of the light incident surface 162A of the wedge-shaped structure W ₄ is the shortest, while the vertical distance h ₁₄ of the lower tip of the light incident surface 162A of the other wedge-shaped structures W ₁ , W ₂ , and W ₃ , h ₂₄ , h ₃₄ , as the distance between each wedge _- shaped structure W and the central area 161 increases, it will first increase and then remain flat, that is to say, the vertical distance h ₄₄ is the shortest, and the vertical distance h ₁₄ of the cusp at the lower end of the light-incident surface 162A of the innermost wedge-shaped structure W ₁ is smaller than the vertical distance h ₂₄ of the cusp at the lower end of the light-incident surface 162A of the wedge-shaped structure W _{2 ;} The vertical distance h ₂₄ of the lower tip of the light surface 162A is equal to the vertical distance h ₃₄ of the lower tip of the wedge-shaped structure W ₃ on the light incident surface 162A. Therefore, the relationship between the vertical distances h ₁₄ , h ₂₄ , h ₃₄ , and h ₄₄ of the sharp points at the lower ends of the light incident surfaces 162A of the wedge-shaped structures W ₁ , W ₂ , W ₃ , and W ₄ in this embodiment is: h ₄₄ < h ₁₄ <h ₂₄ =h ₃₄ .

In this embodiment, the type, quantity and arrangement of the light sources 12 are not limited. In terms of types, the light source 12 can be an LED chip, an LED package or a dome light, a tungsten lamp, or other point-shaped or linear light-emitting elements. In terms of quantity, although only one light source 12 is shown in the figure, it can be single or multiple, and a single light source 12 includes multiple light emitting chips packaged into a package. As far as the arrangement is concerned, the light source 12 can be arranged at the center of the corresponding lens 13, or arranged in a straight line, circle, arc, cross, array or other shapes. In addition, in order to achieve a preferred effect, the lens 13 of this application can also be doped with some foreign materials, such as scattering particles or colorants, to improve the scattering effect or change the color of light emitted.

The light transmission mode of the light provided by the light source 12 in the lens 13 will be described in detail below. Please refer to FIG. 2 and FIG. 3A to FIG. 3C at the same time. The lens 13 has a light incident portion 13A and a light exit portion 13B, wherein the light incident portion 13A faces the light source 12, so that the light emitted by the light source 12 enters the lens 13 from the light incident portion 13A, It is guided by the lens 13 and exits from the light incident portion 13A (the arrow in FIG. 3A is the direction in which the light exits). And the ratio of the height to the width of the lens 13 in this embodiment is between 0.1 and 0.6. Preferably the ratio of height to width is between 0.2 and 0.4.

In detail, the central area 131 of the light incident portion 13A of this embodiment may be a curved lens, and the edge area 132 is disposed around the central area 131 . The plurality of connected wedge-shaped structures W in the edge region 132 of the present embodiment are sequentially arranged from the inside to the outside. The number of wedge-shaped structures W in the edge region 132 is less than 6, preferably between 2 and 5. Generally speaking, the more the number of wedge-shaped structures W, the better the directivity of the overall light output.

The reflective surface 132B of each wedge-shaped structure W is connected to the light-incident surface 132A of the next wedge-shaped structure W, and the light-incident surface 132A of the innermost wedge-shaped structure W ₁ is connected to the central region 131 . In other words, each wedge-shaped structure W is connected in sequence and arranged around the central region 131 , and the reflective surface 132B of the outermost wedge-shaped structure W ₄ is connected to the light-incident surface 132A.

As shown in FIG. 3C , in this embodiment, the angle α 1 formed between the tip of the wedge angle of the innermost wedge-shaped structure W ₁ and the center and edge of the light source 12 will be greater than the angle α ₁ between the tip of the wedge angle of the outermost wedge-shaped structure W and the center and edge of the light source 12. The angle α ₄ between the center and edge of the light source.

In addition, each wedge-shaped structure W corresponds to a partial light-emitting angle β in the light range emitted by the light source 12 , and the light-emitting angle β corresponding to each wedge-shaped structure W is the same or different. Each light emitting angle β corresponding to each wedge structure W is between 5 degrees and 25 degrees.

In addition, the light incident surface 132A of each wedge-shaped structure W respectively receives the light within the preset angle range emitted by the light source 12, and uses the reflective surface 132B of each wedge-shaped structure W to completely reflect the received light, for example, the light source 12 light enters from the incident surface 132A and is reflected by the reflecting surface 132B.

Each wedge-shaped structure W is responsible for total reflection of the light in the side area of the light source 12, the innermost wedge _- shaped structure W1 is responsible for total reflection of the light in the side area within the light emitting angle β1, and the secondary wedge _- shaped structure _W2 is responsible for The light in the side area within the light emitting angle _β2 is totally reflected, and the primary wedge-shaped structure W ₃ is responsible for total reflection of the light in the side area within the light emitting angle β ₃ , and the outermost wedge-shaped structure W ₄ is responsible for _The light in the side area within the emission angle β4 is totally reflected. The luminous angles β ₁ , β ₂ , β ₃ and β ₄ can be the same or different.

As shown in FIG. 4 , in this embodiment, the lens 17 can further have a plurality of microstructures 171 , and the light incident portion 17A or the light exit portion 17B at least partially have the microstructures 171 . The microstructure can be formed in embossment, sandblasting, atomization, casting, cutting, etching, or printing to form multiple predetermined image distributions on the light incident portion 17A or light exit portion 17B. Dimples, bumps or V-grooves.

As shown in FIGS. 3A to 4 , in this embodiment, the light exit portions 13B, 14B, 15B, 16B, and 17B of the lenses 13, 14, 15, 16, and 17 can be flat, curved, concave, convex, or micro lens. , Pizza surface, micro pizza surface, atomized surface or irregular surface.

In summary, the present invention sets a central area and an edge area corresponding to the light source of the light incident part of the lens, and the edge area has a plurality of wedge-shaped structures, and each wedge-shaped structure can provide the same collimation and concentration as the known light-emitting device. Thinner lenses and light emitting devices for the effect of light and uniform heat dissipation.

The above descriptions are illustrative only, not restrictive. Any equivalent modifications or changes made without departing from the spirit and scope of the present case shall be included in the appended claims.

Claims (10)

1. A lighting device, comprising: Light source, the emitted light is divided into main area light and side area light; and The lens has a light exit portion and a light entry portion, and the light entry portion has an accommodating space, the light source is arranged in the accommodating space, and the light entry portion has a central area and an edge area, wherein the central area receives the main area light , and the edge area is connected to the central area and corresponds to the light in the side area, the edge area has a plurality of connected wedge-shaped structures arranged in sequence from the inside to the outside, and each of the wedge-shaped structures has a light incident surface and a reflection surface, Wherein the light in the side region is incident on the light-incident surface of each of the wedge-shaped structures, and is reflected by the reflection surface corresponding to each of the light-incidence surfaces, and exits from the light-emitting portion, Among them, the vertical distance between the sharp point at the lower end of the light-incident surface of the wedge-shaped structure farthest from the central area and the plane where the light source is set is the shortest, while the vertical distances between the sharp points at the lower end of the light-incident surface of other wedge-shaped structures and the plane will vary with each other. The distance between each wedge-shaped structure and the central area increases and decreases. 2. The light emitting device according to claim 1, wherein the lens further comprises a plurality of microstructures, and the light incident portion or the light exit portion at least partially has the microstructures. 3. A lighting device, comprising: Light source, the emitted light is divided into main area light and side area light; and The lens has a light exit portion and a light entry portion, and the light entry portion has an accommodating space, the light source is arranged in the accommodating space, and the light entry portion has a central area and an edge area, wherein the central area receives the main area light , and the edge area is connected to the central area and corresponds to the light in the side area, the edge area has a plurality of connected wedge-shaped structures arranged in sequence from the inside to the outside, and each of the wedge-shaped structures has a light incident surface and a reflection surface, Wherein the light in the side region is incident on the light-incident surface of each of the wedge-shaped structures, and is reflected by the reflection surface corresponding to each of the light-incidence surfaces, and exits from the light-emitting portion, Among them, the sharpest point at the lower end of the light incident surface of the wedge-shaped structure farthest from the central area has the shortest vertical distance from the plane where the light source is set, while the vertical distances between the sharp points at the lower end of the light incident surface of the other wedge-shaped structures and the plane are the same. 4. The light emitting device according to claim 3, wherein the lens further comprises a plurality of microstructures, and the light incident portion or the light exit portion at least partially has the microstructures. 5 . The light emitting device according to claim 3 , wherein the light emitting portion is a plane, a curved surface, a concave surface, a convex surface, a microlens surface, a pizza surface, a micro pizza surface, an atomized surface or an irregular surface. 6. A lighting device comprising: Light source, the emitted light is divided into main area light and side area light; and The lens has a light exit portion and a light entry portion, and the light entry portion has an accommodating space, the light source is arranged in the accommodating space, and the light entry portion has a central area and an edge area, wherein the central area receives the main area light , and the edge area is connected to the central area and corresponds to the light in the side area, the edge area has a plurality of connected wedge-shaped structures arranged in sequence from the inside to the outside, and each of the wedge-shaped structures has a light incident surface and a reflection surface, Wherein the light in the side region is incident on the light-incident surface of each of the wedge-shaped structures, and is reflected by the reflection surface corresponding to each of the light-incidence surfaces, and exits from the light-emitting portion, Among them, the vertical distance between the sharp point at the lower end of the light-incident surface of the wedge-shaped structure farthest from the central area and the plane where the light source is set is the shortest, while the vertical distances between the sharp points at the lower end of the light-incident surface of other wedge-shaped structures and the plane will vary with each other. The distance between each wedge-shaped structure and the central area increases firstly and then decreases. 7. The light emitting device according to claim 6, wherein the lens further comprises a plurality of microstructures, and the light incident portion or the light exit portion at least partially has the microstructures. 8. A lighting device comprising: Light source, the emitted light is divided into main area light and side area light; and The lens has a light exit portion and a light entry portion, and the light entry portion has an accommodating space, the light source is arranged in the accommodating space, and the light entry portion has a central area and an edge area, wherein the central area receives the main area light , and the edge area is connected to the central area and corresponds to the light in the side area, the edge area has a plurality of connected wedge-shaped structures arranged in sequence from the inside to the outside, and each of the wedge-shaped structures has a light incident surface and a reflection surface, Wherein the light in the side region is incident on the light-incident surface of each of the wedge-shaped structures, and is reflected by the reflection surface corresponding to each of the light-incidence surfaces, and exits from the light-emitting portion, Among them, the vertical distance between the sharp point at the lower end of the light-incident surface of the wedge-shaped structure farthest from the central area and the plane where the light source is set is the shortest, while the vertical distances between the sharp points at the lower end of the light-incident surface of other wedge-shaped structures and the plane will vary with each other. The distance between each wedge-shaped structure and the central area increases firstly and then becomes flat. 9. The light emitting device according to claim 8, wherein the lens further comprises a plurality of microstructures, and the light incident portion or the light exit portion at least partially has the microstructures. 10. The light-emitting device according to claim 8, wherein the light-emitting portion is a plane, a curved surface, a concave surface, a convex surface, a microlens surface, a pizza surface, a micro pizza surface, an atomized surface or an irregular surface.