CN107631271B

CN107631271B - Lens, light source module combination and lighting device

Info

Publication number: CN107631271B
Application number: CN201711041641.1A
Authority: CN
Inventors: 卜晨曦
Original assignee: Opple Road Lighting Co ltd
Current assignee: Opple Road Lighting Co ltd
Priority date: 2017-10-31
Filing date: 2017-10-31
Publication date: 2024-01-09
Anticipated expiration: 2037-10-31
Also published as: CN107631271A

Abstract

The invention discloses a lens, a light source module combination and a lighting device, wherein the lens is provided with an inner surface, an outer surface, a bottom surface and a cavity, the wall surface of the cavity is the inner surface of the lens, the bottom surface is positioned at two sides of the cavity, the inner surface comprises a first light inlet surface and a second light inlet surface which are connected, the first light inlet surface and the second light inlet surface are connected to form a tooth angle, the outer surface comprises a first light outlet surface, a second light outlet surface and a first reflecting surface, the second light outlet surface and the first reflecting surface form another tooth angle, the lens is of an extension type structure, the cross section perpendicular to the extension direction of the lens is a cross section of the lens, the two tooth angles are positioned at the same side of the center line of the cross section of the lens, and incident light enters the lens from the inner surface and exits from the outer surface to one side of the lens. The lens provided by the invention forms large-angle polarized light by arranging the reflecting surface, and has higher light distribution efficiency.

Description

Lens, light source module combination and lighting device

Technical Field

The invention belongs to the technical field of illumination, and particularly relates to a lens, a light source module combination and an illumination device.

Background

As a light distribution element, a lens is widely used in lighting devices. In some specific scenes, the lens is required to have the characteristic of large-angle polarization, however, the existing lens is limited by the shape and the material property of the lens, so that after the light emitted by the light source passes through the secondary light distribution of the lens, the polarization angle is smaller, and the propagation distance of the light is not far enough.

The light source module of the existing garden lamp generally uses a fluorescent tube, a high-power bulb or a columnar corn cob LED light source module, and a large part of light emitted by the light source module irradiates the sky, so that the illumination to the ground is less, and the illumination effect of 'lighting the ground and not lighting' is caused. Therefore, there is a need for a light distribution element suitable for use in existing garden lamps that has the property of polarizing light at a large angle to increase the illuminance on the ground.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a lens capable of realizing wide-angle polarization.

In order to achieve the above object, the present invention provides a lens comprising an inner surface, an outer surface, a bottom surface and a cavity, wherein the wall surface of the cavity is the inner surface of the lens,

the bottom surface is located on both sides of the cavity,

the inner surface is a light incident surface and comprises a first light incident surface and a second light incident surface which are connected, the first light incident surface and the second light incident surface are connected to form a tooth angle,

the outer surface comprises a light-emitting surface and a reflecting surface, the light-emitting surface comprises a first light-emitting surface and a second light-emitting surface, the reflecting surface comprises a first reflecting surface, the first light-emitting surface and the first reflecting surface respectively extend to the bottom surface, the second light-emitting surface and the first reflecting surface form another tooth angle,

the lens is of an extension type structure, the cross section perpendicular to the extension direction of the lens is the cross section of the lens, the two tooth angles are positioned on the same side of the central line of the cross section of the lens, incident light enters the lens from the inner surface, and exits from the outer surface to one side of the lens.

Furthermore, the light entering the lens from the first light entering surface directly exits from the first light exiting surface, the light entering the lens from the second light entering surface exits from the second light exiting surface after being reflected by the first reflecting surface,

the directions of the light rays emitted by the first light-emitting surface and the second light-emitting surface are approximately the same.

Further, the light-emitting surface further comprises a third light-emitting surface, the reflecting surface further comprises a second reflecting surface, the third light-emitting surface and the second reflecting surface form a further tooth angle, the third light-emitting surface and the first light-emitting surface are adjacent surfaces, the second reflecting surface and the second light-emitting surface are adjacent surfaces,

the light entering the lens from the first light incident surface is partially reflected by the second reflecting surface and then exits from the third light emergent surface,

the direction of the light rays emitted from the third light emitting surface is approximately the same as the direction of the light rays emitted from the first light emitting surface and the second light emitting surface.

Further, the second reflecting surface is opposite to the second light emitting surface to form a V-shaped structure.

Further, the first reflecting surface and the second reflecting surface are total internal reflection surfaces.

Further, the first light emitting surface and the first reflecting surface are curved surfaces protruding along a direction away from the first accommodating cavity.

Further, the lens further includes a pair of posts protruding outwardly from the bottom surface and located on either side of the cavity.

Further, the cross section of each point in the extending direction of the lens is the same.

Further, the lens is of an axisymmetric structure.

Further, the polarized angle of the light rays emitted from the outer surface is not less than 45 °.

In order to achieve the above object, the present invention further provides a light source module, which includes a light emitting assembly and the lens, wherein the light emitting assembly includes a light source board and a plurality of light emitting units disposed on the light source board, and the lens is disposed in a ring shape and covers the light emitting units.

Further, the light source plate is a circular plate, and the plurality of light emitting units are annularly arranged near the edge of the light source plate.

Further, the lens further comprises a pair of upright posts protruding outwards from the bottom surface and located on two sides of the cavity, the upright posts form a containing area, and the light-emitting unit is contained in the containing area.

Further, the lens is detachably connected with the light source plate.

Further, the light source module further comprises a first base and a second base, and the first base and the second base are respectively located at two sides of the light emitting component.

Further, the lens is annularly arranged at one side or the outer side of the first base and the second base.

Further, the first base comprises a first body and a first connecting portion, the second base comprises a second body and a second accommodating portion, and the first base and the second base are both connected with the light source plate.

Further, the first body comprises a first top surface and a first side surface connected with the first top surface, the second body comprises a second top surface and a second side surface connected with the second top surface, and the first top surface and the second top surface are both planes.

In order to achieve the above object, the present invention further provides a light source module assembly, which includes at least two light source modules and at least one driving power source, wherein the light source modules are electrically connected, and the at least one driving power source supplies power to the at least two light source modules.

Further, the at least two light source modules are stacked, and the adjacent light source modules are detachably connected.

Further, the adjacent light source modules are connected in a plug-in mode.

Further, the light source module combination further comprises a lamp cap, and the at least two light source modules are electrically connected with the lamp cap.

Further, the lamp cap is a screw lamp cap or a bayonet lamp cap.

The invention also provides a lighting device which comprises a base, a cover body connected with the base, and the light source module or the light source module combination, wherein the light source module or the light source module combination is arranged on the base, and light rays emitted by the light source module are transmitted from the cover body.

Further, the base is conical.

The beneficial effects are that: according to the lens provided by the invention, the reflection surface is arranged to form large-angle polarized light, and the light path sectional type design is adopted, so that the lens has higher light distribution efficiency, and the lighting device applying the lens has higher luminous efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a perspective view of a lighting device according to embodiment 1 of the present invention.

Fig. 2 is a perspective view of a light source module assembly in the lighting device shown in fig. 1.

Fig. 3 is a cross-sectional view taken along line A-A in fig. 2.

Fig. 4 is an exploded view of a single light source module within the light source module assembly shown in fig. 2.

Fig. 5 is a cross-sectional view of a lens within the light source module shown in fig. 4.

Fig. 6 is another cross-sectional view of a lens applied in the light source module shown in fig. 4.

Fig. 7 is a perspective view of a lighting device according to embodiment 2 of the present invention.

Fig. 8 is an exploded view of the lighting device of fig. 7.

Fig. 9 is an exploded view of the light source module in the lighting device shown in fig. 8.

Fig. 10 is an exploded perspective view of a lighting device according to embodiment 3 of the present invention.

Fig. 11 is a perspective view of a light source module in the lighting device shown in fig. 10.

Fig. 12 is an exploded view of another lens assembly according to embodiment 4 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Fig. 1 to fig. 6 show a lighting device 100 according to the present invention, which includes a base 110, a cover 120 connected to the base 110, and a light source module assembly 130 disposed on the base 110, wherein the cover 120 and the base 110 are connected to form a receiving space (not shown), and the light source module assembly 130 is received in the receiving space. The lighting device 100 of the embodiment of the invention can be applied to a garden lamp, which mainly shines towards the ground, but can also shine upwards.

The following describes each element and the connection relationship between elements in the lighting device 100 according to embodiment 1 of the present invention.

As shown in FIG. 1, the base 110 is generally conical and may be made of a metallic material. The base 110 has a connection portion (not shown) and a base (not shown), the connection portion is configured to be fixed on a mounting base (not shown), and the base is configured to be electrically connected to the light source module assembly 130. In an embodiment, the power supply line enters from the connection portion of the base 110, a driving power source (not shown) is disposed in the base 110, an input end of the driving power source is connected to the power supply line, and an output end of the driving power source is electrically connected to the base. The connection between the base and the light source module assembly 130 may be a threaded connection or a snap-fit connection.

The cover 120 covers one side of the base 110, and includes a top structure 1201 and a side structure 1202 connected in a split manner, where the side structure 1202 has a certain height, so that the height of the accommodating space meets the requirement of the light source module assembly 130. The side structures 1202 are annular diffusion masks, light transmitting masks, or frosting masks. The connection between the cover 120 and the base 110 may be in a plugging, clamping, screw connection or the like manner.

As shown in fig. 2 to fig. 4, the light source module assembly 130 includes a lamp holder 1301, a plurality of light source modules 1302 mounted on the lamp holder 1301, and a driving power source for supplying power to the light source modules 1302, which may be a constant voltage source (not shown), wherein the plurality of light source modules 1302 are stacked in sequence from bottom to top, and the adjacent light source modules 1302 are detachably connected, for example, may be connected in a plugging manner. The base 1301 may be an E14 screw base, an E27 screw base, or a bayonet base.

The light source module 1302 includes a light emitting assembly 1, a lens 2 disposed on one side of the light emitting assembly 1, and a first base 3 and a second base 4 disposed on both sides of the light emitting assembly 1.

The light emitting assembly 1 includes a light source board 11 and a plurality of light emitting units 12 disposed on the light source board 11, and an electrical connection interface (not shown) is disposed on the light source board 11. In the present embodiment, the light source plate 11 is a circular plate, and the light emitting units 12 are annularly disposed at the edge of the light source plate 11. The light emitting unit 12 is an LED light source.

The lens 2 is disposed in a ring shape, and is detachably connected with the light source plate 11, for example, by a screw connection or a snap connection. The lens 2 may be integrally formed or may be composed of a plurality of arcuate lens units having the same cross section in the extending direction. In this embodiment, the lens 2 has an axisymmetric structure, i.e. the lens 2 has a circular ring.

As shown in fig. 5, the lens 2 has an inner surface 21, an outer surface 22, a bottom surface 23, and a cavity 20, and the wall surface of the cavity 20 is the inner surface 21 of the lens 2.

The inner surface 21 is a light incident surface, and includes a first light incident surface 211 and a second light incident surface 212 connected to each other, and the first light incident surface 211 and the second light incident surface 212 are disposed opposite to each other. The first light incident surface 211 and the second light incident surface 212 are connected to form a first tooth angle 201. In the embodiment, the first light incident surface 211 is a curved surface, the second light incident surface 212 is a plane, and the first light incident surface 211 and the second light incident surface 212 intersect at a first position 2011, i.e. the top of the first tooth angle 201 is the first position 2011, and the first position 201 is offset from the light source center line X.

The outer surface 22 includes a light-emitting surface including a first light-emitting surface 221, a second light-emitting surface 222, and a third light-emitting surface 223, and a reflective surface including a first reflective surface 224 and a second reflective surface 225. Specifically, the second reflecting surface 225 is opposite to the third light emitting surface 223, and forms a V-shaped structure. The second light-emitting surface 222 and the first reflecting surface 224 form a second tooth angle 226, and the third light-emitting surface 223 and the second reflecting surface 225 form a third tooth angle 227. The second tooth angle 226 and the third tooth angle 227 are opposite and each less than 90 °. In this embodiment, the tops of the second tooth angle 226 and the third tooth angle 227 are at the same height, and in other alternative embodiments, the top of the second tooth angle 226 may be less than or greater than the top of the third tooth angle 227. In this embodiment, the first tooth angle 201 and the second tooth angle 226 are located on one side of the light source center line X, and the third tooth angle 227 is located on the other side of the light source center line X, and in other alternative embodiments, the first tooth angle 201, the second tooth angle 226, and the third tooth angle 227 may be located on the same side of the light source center line X. The third light-emitting surface 223 is an adjacent surface of the first light-emitting surface 221. The first light-emitting surface 221 and the first reflecting surface 224 respectively extend to the bottom surface 23, and the first light-emitting surface 221 and the first reflecting surface 224 are curved surfaces protruding along a direction away from the first accommodating cavity 20. In the present embodiment, the first reflective surface 224 and the second reflective surface 225 are total internal reflection surfaces.

The bottom surface 23 is located on both sides of the cavity 20. In this embodiment, the lens 2 further includes a pair of posts 24, the posts 24 protrude from the bottom surface 23 toward the side where the light source plate 11 is located and are located at two sides of the cavity 20, a receiving area 240 is formed by the height of the posts 24 and the space between adjacent posts 24, the light source plate 11 is attached to the end surface of the posts 24, and the light emitting unit 12 is received in the receiving area 240. In other alternative embodiments, the light emitting unit 12 may also be disposed within the cavity 20.

The light emitted by the light emitting unit 12 is divided into three paths through the light path of the light distribution of the lens 2: 1. enters the lens 2 from the first light incident surface 211 and directly exits from the first light emergent surface 221; 2. the first light incident surface and the second light incident surface 224 and the second light incident surface 225 are disposed such that the directions of the light rays emitted from the first light incident surface 221, the second light incident surface 222 and the third light incident surface 223 are substantially the same, and form a large-angle polarized light, in this embodiment, the polarized light angle of the emitted light ray is not less than 45 °, that is, the polarized light angle of the emitted light ray is not less than 45 ° with respect to the light source center line X. In other alternative embodiments, the maximum polarization angle may also be set to a, which is less than 45 °.

In the present embodiment, the light distribution of the light source module 1302 to which the lens 2 is applied is batwing light distribution.

As shown in fig. 6, in another cross-sectional structure of the lens 2 'provided in this embodiment, the structure of the lens 2' is similar to that of the lens 2, and each of the cross-sectional structures has an inner surface 21', an outer surface 22', a bottom surface 23', and a cavity 20', and the structures of the cavity 20 'and the inner surface 21' of the lens 2 'are the same as those of the cavity 20 and the inner surface 21 of the lens 2, i.e. the inner surface 21' includes a first light incident surface 211 'and a second light incident surface 212' which are connected, and the first light incident surface 211 'and the second light incident surface 212' are connected to form a tooth angle. The difference is that the outer surface 22' of the lens 2' only includes the first light-emitting surface 221', the second light-emitting surface 222' and the first reflecting surface 224' form another tooth angle, and the first light-emitting surface 221' and the second light-emitting surface 222' are adjacent surfaces.

The light emitted from the light emitting unit 12 is split into two paths through the optical path of the light distribution of the lens 2': 1. enters the lens 2' from the first light incident surface 211' and directly exits from the first light emergent surface 221 '; 2. the light enters the lens 2 'from the second light incident surface 212', is reflected by the first reflecting surface 224', and exits from the second light emergent surface 222'. Due to the arrangement of the first reflecting surface 224', the directions of the light rays emitted from the first light emitting surface 221' and the second light emitting surface 222' are approximately the same, and a large-angle polarized light is formed, and the polarized light angle is not less than 45 °. The light distribution of the light source module using the lens 2' is also batwing light distribution.

As shown in fig. 3 and 4, fig. 3 is a schematic view of the light source module assembly 130 in which the lens 2 shines downward, fig. 4 is an exploded view of the light source module 1302, and fig. 4 is a view angle of the light source module 1302 rotated by about 180 ° for clarity. The first base 3 includes a first body 31 and a first connecting portion 32, where the first body 31 is in a shape of a cover, and the opening faces the light source board 11. The first connection portion 32 is detachably connected to the light source board 11, for example, a screw connection, a clamping connection, a plugging connection, or the like may be adopted. The first body 31 includes a first top surface 311 and a first side surface 312 connected to the first top surface 311, wherein the first top surface 311 is a plane, and the first side surface 312 extends to the first connection portion 32.

The second base 4 includes a second body 41 and a second accommodating portion 42, the second body 41 is in a cover shape, and the opening faces the light source board 11, and the light source board 11 is accommodated in the second accommodating portion 42. The second base 4 and the light source plate 11 can be detachably connected, for example, screw connection, clamping connection, plugging connection and the like can be adopted. The second body 41 includes a second top surface 411 and a first side surface 412 connected to the second top surface 411, the second top surface 411 is a plane, and the second side surface 412 extends to the second accommodating portion 42. As shown in fig. 3, in the present embodiment, the lens 2 is disposed on the lower side of the second base 4, and the lens 2 is disposed annularly on the outer side of the first base 3. In other alternative embodiments, the setting position of the lens 2 is not limited thereto.

As shown in fig. 3, when adjacent light source modules 302 are stacked, the opposite first base 3 and second base 4 are sequentially connected, for example, the first base 3 of the light source module 302 located above is plugged onto the second base 4 of the light source module 302 located below, so that the adjacent light source modules 302 are fixedly connected, and the lowest light source module 302 is connected to the lamp cap 301.

In the present embodiment, the light source module assembly 130, which is composed of a lamp cap 301 and a plurality of light source modules 302, has a columnar shape and is installed in the accommodating space of the lighting device 100. The number of combinations of the light source modules 302 can be selected according to the power required by different occasions, so that the flexibility of using the lighting device 100 is improved.

In summary, in the lighting device 100 provided by the embodiment of the invention, the lens 2 therein forms large-angle polarized light by arranging the first reflecting surface 224 and the second reflecting surface 225, and the design of light path segmentation is adopted, so that the lens 2 has higher light distribution efficiency. The power of the light source module combination 130 can be conveniently adjusted according to occasions by using the light source module combination 130 of the lens 2, and the light distribution of the light source module combination 130 is batwing light distribution, so that the luminous efficiency of the lighting device 100 serving as a garden lamp is greatly improved.

Example 2

Fig. 7 to fig. 9 show a lighting device 100a according to the present invention, which includes a base 110a, a top cover 140a, a cover 120a connected between the base 110a and the top cover 140a, a light source module 130a disposed on the top cover 140a, and a routing rod 150a, wherein the base 110a, the cover 120a and the top cover 140a are connected to form a containing space (not labeled), and the light source module 130a and the routing rod 150a are contained in the containing space. The lighting device 100a of the embodiment of the invention can be applied to a garden lamp, which mainly shines towards the ground, but can also shine upwards.

The following describes the connection relationship between each element in the lighting device 100a according to embodiment 2 of the present invention.

As shown in fig. 7, the base 110a is generally conical and may be made of a metallic material. The base 110a has a connection portion (not shown) for fixing to a mounting base (not shown). A driving power supply (not shown) is provided in the base 111 a.

The cover 120a has a ring structure with a certain height, so that the height of the accommodating space meets the light emitting requirement of the light source module 130 a. The cover 120a is a diffusion mask, a lens mask, or a frosted mask.

The top cover 140a has a substantially conical shape, and a mounting portion 141a for mounting the light source module 130a is provided on the inner side of the top cover 140 a. The light source module 130a is detachably connected to the mounting portion 141a, for example, by a screw connection or a snap connection.

The routing rod 150a is connected between the base 110a and the top cover 140a, and is a hollow tubular structure for routing wires connected from the output end of the driving power source, so as to supply power to the light source module 30a located on the top cover 40 a.

As shown in fig. 8 and 9, the light source module 130a includes a light emitting module 1a and a lens assembly 200a disposed on one side of the light emitting module 1a.

The light emitting assembly 1a includes a light source plate 11a and a plurality of light emitting units 12a disposed on the light source plate 11a, the plurality of light emitting units 12a forming a ring shape. In this embodiment, the light source plate 11a is a circular plate, the plurality of light emitting units 12a form two concentric annular structures of an inner ring and an outer ring, the inner ring structure 121a is circular, and the outer ring structure 122a is petal-shaped. The light emitting unit 12a is an LED light source.

The lens assembly 200a is provided in a ring shape, detachably connected to the light source plate 11a, and entirely covers the light emitting unit 12a. The lens assembly 200a includes a first annular lens 201a and a second annular lens 202a, the first annular lens 201a overlying the inner annular structure 121a and the second annular structure 202a overlying the outer annular structure 122a. The first annular lens 201a and the second annular lens 202a may be integrally formed, or may be composed of a plurality of arcuate lenses 2a, which have the same cross section in the extending direction.

The cross-sectional structure of the lens 2a may employ any of the cross-sectional structures of the lenses 2 provided in embodiment 1. The light distribution of the lens 2a is batwing light distribution. The lens 2a forms large-angle polarized light by arranging the reflecting surface, and the lens 2a distributes light in two paths or three paths, and the directions of the two paths or the three paths are approximately the same, so that the lens 2a has higher light distribution efficiency. In this embodiment, the first annular lens 201a and the second annular lens 202a both adopt the light distribution direction of the internal polarized light, that is, the annular internal polarized light of the first annular lens 201a and the second annular lens 202a, in this way, the distance from the light to the cover 120a can be longer, the irradiation range is larger, the cover 120a can be more uniform for the diffusion mask, and the light distribution of the batwing of the lens 2a is not affected by the irradiation mode for the transparent mask or the frosted mask. In other alternative embodiments, the first annular lens 201a and the second annular lens 202a may also employ the light distribution direction of the external polarized light, that is, the annular external polarized light to the first annular lens 201a and the second annular lens 202 a.

In summary, in the lighting device 100a provided by the embodiment of the present invention, the lens assembly 200a therein adopts a segmented annular assembly structure, so that the assembly mode of the lens 2a can be adjusted according to the power required by the application scene. The lens 2a in the lens combination 200a forms a large angle polarization and has a high light distribution efficiency. The light source module 30a using the lens assembly 200a has higher luminous efficiency.

Example 3

Fig. 10 and 11 show a lighting device 100b according to the present invention, which includes a base 110b, a top cover 140b, a cover 120b connected between the base 110b and the top cover 140b, a light source module 130b disposed on the top cover 140b, and a decoration column 150b, wherein the base 110b, the cover 120b and the top cover 140b are connected to form a containing space (not labeled) in which the light source module 130b and the decoration column 150b are contained. The lighting device 100b of the embodiment of the invention can be applied to a garden lamp, which mainly shines towards the ground, but can also shine upwards.

The structures of the base 110b, the cover 120b and the top cover 140b may be the same as or similar to those of the base 110a, the cover 120b and the top cover 140a provided in embodiment 2, and may be other structures.

The decoration column 150b is connected between the base 110b and the top cover 140b, and a pipe through which a wire passes is provided inside the decoration column 150b for supplying power to the light source module 130b positioned on the top cover 140 b.

As shown in fig. 11, the light source module 130b includes a light emitting module 1b and a lens assembly 200b disposed on one side of the light emitting module 1 b. The light emitting assembly 1b includes a light source board 11b and a plurality of light emitting units (not shown) disposed on the light source board 11 b. In this embodiment, the light source plate 11b is a circular plate, and the plurality of light emitting units form two concentric annular structures of an inner ring and an outer ring, and the inner ring structure and the outer ring structure are both equilateral polygons.

The lens assembly 200b is provided in a ring shape, detachably connected to the light source plate 11b, and entirely covers the light emitting unit. Specifically, the lens assembly 200b includes a first annular lens 201b and a second annular lens 202b, where the first annular lens 201b and the second annular lens 202b are equilateral polygons, and the first annular lens 201b covers the inner annular structure and the second annular lens 202b covers the outer annular structure. The first annular lens 201b and the second annular lens 202b are each composed of a plurality of straight strip-shaped lenses 2 b. Also, the cross section of the lens 2b in the extending direction is the same, and the cross-sectional structure thereof may be any of the cross-sectional structures of the lenses 2 provided in embodiment 1.

The light distribution of the lens 2b is batwing light distribution. The lens 2b forms large-angle polarized light by arranging the reflecting surface, and the lens 2b distributes light in two paths or three paths, and the directions of the two paths or the three paths are approximately the same, so that the lens 2b has higher light distribution efficiency. In the present embodiment, the first annular lens 201b is internally polarized, i.e. polarized to the annular inner side of the lens 2b for lighting the decorative columns 150b in the lighting device 100b, and the second annular lens 202b is externally polarized, i.e. polarized to the annular outer side of the lens 2b for lighting the ground.

In summary, in the lighting device 100b provided by the embodiment of the present invention, the lens assembly 200b therein adopts a segmented annular assembly structure, so that the assembly mode of the lens 2b can be adjusted according to the power required by the application scene, and the deflection direction of the outgoing light ray can be flexibly adjusted. The lens 2b in the lens assembly 200b is provided with a reflecting surface to form large-angle polarized light, and has higher light distribution efficiency, and the light source module 30b applying the lens assembly 200b has higher luminous efficiency.

Example 4

Fig. 12 shows a lens assembly 200c of the present invention comprising three curved lenses 20c, configured like an equilateral triangle.

The cross section of the lens 20c in the extending direction is the same, and the cross-sectional structure thereof may be any of the cross-sectional structures of the lenses 2 provided in embodiment 1. The lens 2c is provided with a reflecting surface, so that the light emitted by the lens 2c forms large-angle polarized light, the specific light type is batwing light distribution, and the incident light is distributed in two paths or three paths, and the directions of the two paths or the three paths are approximately the same. In the present embodiment, the lens assembly 200c is an external polarized light set.

The lens combination 200c provided in this embodiment 4 can be applied to any one of the lighting devices of embodiments 1 to 3.

While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications may be made within the spirit and principles of the invention.

Claims

1. A lens comprises an inner surface, an outer surface, a bottom surface and a cavity, wherein the wall surface of the cavity is the inner surface of the lens,

the bottom surface is located on both sides of the cavity,

the lens is of an extension type structure, a cross section perpendicular to the extension direction of the lens is a cross section of the lens, two tooth angles are positioned on the same side of the central line of the cross section of the lens, incident light enters the lens from the inner surface, and exits from the outer surface to one side of the lens;

light entering the lens from the first light-in surface directly exits from the first light-out surface, light entering the lens from the second light-in surface is reflected by the first reflecting surface and then exits from the second light-out surface,

the directions of the light rays emitted by the first light-emitting surface and the second light-emitting surface are approximately the same;

the lens is of an axirotationally symmetrical structure;

the deflection angle of the light rays emitted from the outer surface is not smaller than 45 degrees relative to the central line of the light source.

2. The lens of claim 1, wherein the light exit surface further comprises a third light exit surface, the reflective surface further comprises a second reflective surface, the third light exit surface and the second reflective surface form a further tooth angle, the third light exit surface is adjacent to the first light exit surface, the second reflective surface is adjacent to the second light exit surface,

3. The lens of claim 2, wherein the second reflecting surface is opposite to the second light emitting surface and forms a V-shaped structure.

4. The lens of claim 2, wherein the first reflective surface and the second reflective surface are total internal reflection surfaces.

5. The lens of claim 1, wherein the first light-exiting surface and the first reflecting surface are curved surfaces that protrude in a direction away from the cavity.

6. The lens of claim 1 further comprising a pair of posts projecting outwardly from the bottom surface and located on either side of the cavity.

7. The lens of claim 1, wherein the cross-section of each point in the direction of extension of the lens is the same.

8. The light source module is characterized by comprising a light emitting component and the lens of any one of claims 1-7, wherein the light emitting component comprises a light source plate and a plurality of light emitting units arranged on the light source plate, and the lens is annularly arranged and covers the light emitting units.

9. The light source module of claim 8, wherein the light source plate is a circular plate, and the plurality of light emitting units are annularly arranged near an edge of the light source plate.

10. The light source module of claim 8, wherein the lens further comprises a pair of posts protruding outward from the bottom surface and located on two sides of the cavity, the posts forming a receiving area, the light emitting unit being received in the receiving area.

11. The light source module of claim 8, wherein the lens is removably coupled to the light source board.

12. The light source module of claim 8, further comprising a first base and a second base, wherein the first base and the second base are located on two sides of the light emitting assembly, respectively.

13. The light source module of claim 12, wherein the lens is annularly disposed on one side or the outside of the first base and the second base.

14. The light source module of claim 12, wherein the first base comprises a first body and a first connection portion, the second base comprises a second body and a second receiving portion, and the first base and the second base are both connected with the light source board.

15. The light source module of claim 14, wherein the first body comprises a first top surface and a first side surface connected to the first top surface, the second body comprises a second top surface and a second side surface connected to the second top surface, and the first top surface and the second top surface are both planar.

16. A light source module combination, comprising at least two light source modules according to any one of claims 8-15 and at least one driving power source, wherein the light source modules are electrically connected, and the at least one driving power source supplies power to the at least two light source modules.

17. The combination of claim 16, wherein the at least two light source modules are stacked and detachably connected to each other.

18. The combination of claim 17, wherein adjacent light modules are connected in a plug-in manner.

19. The combination of claim 16, further comprising a lamp cap, wherein the at least two light source modules are electrically connected to the lamp cap.

20. The light source module combination of claim 19, wherein the lamp cap is a screw cap or a bayonet cap.

21. A lighting device comprising a base, a cover connected to the base, and a light source module according to any one of claims 8-15 or a light source module combination according to any one of claims 16-20, wherein the light source module or the light source module combination is disposed on the base, and light emitted by the light source module is transmitted from the cover.

22. A lighting device as recited in claim 21, wherein said base is conical.