CN215335837U

CN215335837U - Lighting device

Info

Publication number: CN215335837U
Application number: CN202122055401.5U
Authority: CN
Inventors: 曹永革; 申小飞
Original assignee: Songshan Lake Materials Laboratory
Current assignee: Institute of Physics of CAS; Songshan Lake Materials Laboratory
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2021-12-28
Anticipated expiration: 2031-08-27

Abstract

The application relates to the field of lighting, in particular to a lighting device. The lighting device includes a light guide portion and a light source. A plurality of scattering points are formed inside the light guide part; the light guide part has a reflection surface. The incident light emitted by the light source can enter the light guide part, and the incident direction of the incident light is not parallel to and perpendicular to the reflecting surface of the light guide part; at least part of the reflected light of the incident light can reach the area where the scattering point is located. When the light with different incidence angles is reflected by the reflecting film of the reflecting surface, a large amount of reflected light with different reflection angles is obtained in the light guide part, and the reflected light with different reflection angles is scattered by the scattering points, so that the scattering uniformity is greatly improved, the light can be uniformly irradiated when being emitted from the light guide part, and the problem of nonuniform irradiation of a common lighting lamp in the prior art is solved.

Description

Lighting device

Technical Field

The application relates to the field of lighting, in particular to a lighting device.

Background

With the development of society and the improvement of living standard of people, the lighting requirements of people on houses and public places are higher and higher, and the lighting device is widely applied to various occasions and needs to achieve good lighting effect while generating a light source so as to meet the lighting requirements. In various illumination occasions, the standard of illumination intensity is achieved, so that the lamp can meet the requirement of certain brightness.

The problems of uneven illumination and uneven brightness exist in the prior common lighting lamp.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a lighting device, can make illumination even, and the light and shade is even.

The application provides a lighting device, includes:

a light guide portion in which a plurality of scattering points are formed; the light guide part is provided with a reflecting surface; and

the light source, the incident light that the light source sends can enter into the light guide part, the incident direction of the incident light is not parallel and not perpendicular with the reflecting surface of the light guide part; at least part of the reflected light of the incident light can reach the area where the scattering point is located.

The application provides a lighting device, because the incident direction of the incident light that the light source sent is not parallel and not perpendicular with the plane of reflection of leading the optical part for the incident angle of the incident light that enters into leading the optical part inside is inequality. When the light with different incidence angles is reflected by the reflecting film of the reflecting surface, a large amount of reflected light with different reflection angles can be obtained in the light guide part, and the reflected light with different reflection angles is scattered by the scattering points of the light guide part, so that the scattering uniformity is greatly improved, and when the light is emitted from the light guide part, the illumination is uniform, and the problems of uneven illumination and uneven brightness of a common illumination lamp in the prior art are solved.

In another embodiment of the present application, the light guide part is made of a transparent solid material, and the scattering points are bubble-shaped cavities inside the light guide part.

By arranging the bubble-shaped cavity as the scattering point, light can be more uniformly diffused, the illumination uniformity of the light source is improved, the light loss can be reduced, the utilization rate of the light is improved, and the illumination brightness is improved.

In another embodiment of the present application, the illumination device includes a light-absorbing portion; the light source is arranged in the light-absorbing part;

the light source emits incident light into the light guide portion after being emitted from the light-absorbing portion.

Through setting up light-absorbing portion to with the light source setting inside light-absorbing portion, can make light get into the light guide part with the incident angle of difference, make the incident light more even, and then be favorable to obtaining even light-emitting.

In another embodiment of the present application, the light-absorbing portion has a light-emitting surface;

the light-emitting surface is formed by a plurality of curved surface polygons in an enclosing manner; or the light-emitting surface is formed by a plurality of plane polygons in a surrounding mode.

The light-emitting surface of the light-absorbing part is formed by surrounding a plurality of curved surface polygons or a plurality of plane polygons, so that incident light with different incident angles can enter the light-guiding part, the incident light is more uniform, subsequent scattering is facilitated, more uniform light-emitting is obtained, and the uniformity of illumination is improved.

In another embodiment of the present application, the light guide portion has a plate shape and a trapezoidal shape; two opposite surfaces of the plate-shaped light guide part are a light emergent surface and a reflecting surface;

the reflecting surface is arranged on the lower bottom surface of the trapezoid body;

the light-emitting surface is arranged on the upper bottom surface of the trapezoid body.

In another embodiment of the present application, the light sources are disposed on two opposite side surfaces of the plate-shaped light guide portion.

In other embodiments of the present application, the light emitting surface has a bump structure.

In another embodiment of the present application, the light guide part has a tubular shape; the reflecting surface and the light-emitting surface are oppositely arranged and enclose to form the peripheral surface of the tubular light guide part;

the light source is disposed at an end of the tubular light guide portion, and incident light from the light source is incident from an end surface of the tubular light guide portion.

In another embodiment of the present application, the above-mentioned lighting device includes:

the shell, the light guide part and the light source are packaged in the shell.

In other embodiments of the present application, the light source includes an LED light source and a light source substrate, the LED light source is mounted on the light source substrate, and the light source substrate is encapsulated in the housing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a first viewing angle of a first lighting device according to an embodiment of the present disclosure;

fig. 2 is an exploded schematic view of a first lighting device according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a second viewing angle of a first lighting device according to an embodiment of the present disclosure;

fig. 4 is a schematic optical path diagram of an illumination device provided in an embodiment of the present application;

fig. 5 is a schematic structural view of a light-absorbing portion of an illumination device according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a first viewing angle of a second lighting device according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a second viewing angle of a second lighting device according to an embodiment of the present disclosure;

fig. 8 is an exploded schematic structural diagram of a second lighting device according to an embodiment of the present application.

Icon: 100-a lighting device; 110-a light directing portion; 111-scattering point; 112-a reflective surface; 113-a light-emitting surface; 117-light incident surface; 120-a light source; 121-a light source substrate; 130-a reflective film; 140-bump structure; 150-a light-harvesting portion; 151-first face; 152-a second face; 153-third face; 154-fourth face; 155-fifth face; 156-sixth face; 160-outer shell.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 to 8, the present embodiment provides a lighting device 100 including: light guide 110 and light source 120.

Further, a plurality of scattering points 111 are formed inside the light guide unit 110.

By providing a plurality of scattering points 111, when light enters the light guide unit 110 and is scattered by the plurality of scattering points 111, the light can be diffused more uniformly, thereby improving the uniformity of the light source illumination.

In some embodiments of the present disclosure, the light guide part 110 is made of a transparent solid material, and the scattering dots 111 are bubble-shaped cavities inside the light guide part 110.

Further, in some embodiments of the present disclosure, the light guide part 110 is made of a high-transmittance PC material or a transparent acrylic material.

The high-transmittance PC material or the transparent acryl has a very high refractive index and does not absorb light, and the light guide part 110 is made of the high-transmittance PC material or the transparent acryl, so that the use efficiency of light can be effectively improved, and the illumination effect can be improved.

Further, in some embodiments of the present application, the scattering dots 111 are bubble-shaped cavity structures formed inside the material during the molding process of the high-transmittance PC material or the transparent acrylic material.

By providing such scattering points of the bubble-shaped cavity structure, when light enters the bubble-shaped cavity structure inside the light guide section 110, reflected light is diffused at various angles, and reflection conditions are broken, thereby greatly improving uniformity of light inside the light guide section 110. Since the scattering point 111 is disposed inside the light guide part 110 and is made of the same material as the light guide part 110, light is not absorbed, light loss is not caused, light use efficiency is greatly improved, and illumination uniformity is improved.

Further, the size and number of the scattering points of the bubble-shaped cavity structure are not limited, and can be set according to actual needs.

In the light guide portion having the same volume, the greater the density of scattering points of the bubble-like cavity structure, the better the scattering effect.

Further, referring to fig. 3 and 4, the light guide part 110 has a reflection surface 112 and a light exit surface 113; the reflection surface 112 is provided with a reflection film 130. The light exit surface 113 and the reflection surface 112 are disposed opposite to each other, and the light exit surface and the reflection surface are separated by the remaining light guide portion having the light entrance surface 117.

The incident light emitted from the light source 120 is incident from the light incident surface 117, and the incident direction of the incident light is not parallel to and perpendicular to the reflection surface 112 of the light guide part 110; at least a part of the incident light entering the light guide 110 is reflected by the reflective film 130, scattered by the scattering points 111, and emitted from the light emitting surface 113.

By providing the reflection film 130, light can be prevented from being emitted from the reflection surface 112, and the light utilization efficiency can be improved. The incident direction of the incident light is not parallel and perpendicular to the reflection surface 112 of the light guide part 110, so that the incident angle of the incident light entering the light guide part 110 is different. When the light with different incident angles is reflected by the reflective film of the reflective surface 112, a large amount of reflected light with different reflection angles can be obtained inside the light guide part 110, and the reflected light with different reflection angles is scattered by the scattering points 111 of the light guide part, so that the scattering uniformity is greatly improved, and when the light is emitted from the light-emitting surface of the light guide part 110, the illumination can be uniform, and the problems of uneven illumination and uneven brightness of a common illumination lamp in the prior art are solved.

Referring to fig. 1 to 3, in some embodiments of the present disclosure, light guide portion 110 has a plate-like shape and a trapezoidal shape; two surfaces of the plate-shaped light guide 110 opposite to each other are a light exit surface 113 and a reflection surface 112. The reflecting surface 112 is disposed on the lower bottom surface of the trapezoidal body. The light emitting surface 113 is disposed on the upper bottom surface of the trapezoid body.

By arranging the light guide part 110 to be plate-shaped and trapezoidal, arranging the reflection surface 112 on the lower bottom surface of the trapezoidal, and arranging the light exit surface 113 on the upper bottom surface of the trapezoidal, it is possible to obtain more incident light with different incident angles after the light enters the light guide part 110 from the side surface of the trapezoidal light guide part 110, and more light reaches the scattering point 111 after being reflected by the reflection film 130, and finally exits from the light exit surface 113 of the light guide part 110. And thus, the light can be more uniformly diffused, so that the light emission of the entire lighting device 100 is more uniform.

Further, referring to fig. 2, the light source 120 is disposed at a side of the light guide part 110, and an incident direction of incident light emitted from the light source 120 is not parallel to and perpendicular to the reflection surface 112 of the light guide part 110.

By disposing the light source 120 at the side of the light guide part 110, and the incident direction of the incident light emitted by the light source 120 is not parallel or perpendicular to the reflection surface 112 of the light guide part 110, the light can enter the light guide part 110 without parallel or perpendicular, so as to obtain more incident lights with different incident angles, and make the light more uniform.

The conventional method in the art is to arrange the light source on the top of the light guide plate to make the light enter the light guide plate at normal incidence, however, this method needs to arrange the light source at a longer distance from the light guide plate, and this method has obvious light spots and poor light uniformity.

Another conventional method in the art is to make a light source enter the light guide portion in parallel, and this arrangement has a large light loss, and the light guide portion has a large brightness at a position closer to the light source, and the middle area of the light guide portion has a dark brightness and a poor light uniformity.

In the scheme of this application, the incident direction of the incident light that the light source sent is not parallel and not perpendicular with the plane of reflection of leading the optical part, and the incident light enters into the optical part from the side of leading the optical part, and at least partial incident light passes through the reflection of reflectance coating, reaches the scattering point scattering back, sends from the play plain noodles. In the process, because the incident light does not parallel and vertically enters the light guide part, the incident light with different angles reaches different positions of the reflecting film, and after being reflected by the reflecting film, different reflected light is reflected towards different angles and reaches scattering points inside the light guide part, so that the diffusion effect is greatly increased, the uniformity of light is increased, the difference of light and shade in different areas of the light guide part 110 is avoided, and the illumination effect is improved.

Further, the reflecting surface 112 is disposed on the lower bottom surface of the trapezoidal body. The light emitting surface 113 is disposed on the upper bottom surface of the trapezoid, so that incident light can enter the light guide portion 110 at a small angle and reach the reflective film 130, and after being reflected by the reflective film 130, reflected light at more different angles is obtained, and after being scattered by the scattering points 111, the reflected light at more different angles is more uniform and finally emitted from the light emitting surface 113.

Further, in some embodiments of the present application, the light sources 120 are disposed at two opposite sides of the plate-shaped light guide part 110.

By providing the light sources 120 on two opposite sides of the plate-shaped light guide part 110, the light sources 120 enter the light guide part 110 from two sides of the light guide part 110, thereby further improving the light divergence effect and the illumination effect.

In another alternative embodiment of the present application, the light source 120 is disposed on one side surface of the plate-shaped light guide part 110.

Further, in some embodiments of the present application, the light source 120 is an LED light source.

In other alternative embodiments of the present application, the light source 120 may also be selected from other types of light sources according to actual needs.

Further, the number of the light sources 120 is not limited. The settings can be selected according to the actual needs. Exemplarily, one or more LED light sources are respectively disposed at two opposite sides of the plate-shaped light guide part 110.

In some embodiments, the light source 120 includes a light source substrate 121, and the LED light source is mounted on the light source substrate 121. In the illustrated embodiment, referring to fig. 3, light source substrates 121 are provided on two opposite side surfaces of the plate-shaped light guide portion 110, and a plurality of LED light sources are provided in each of the light source substrates 121.

Further, in some embodiments of the present disclosure, when the light guide part 110 is shaped like a plate and is a trapezoid, the reflective surface 112 is disposed on a lower bottom surface of the trapezoid, and the light emitting surface 113 is disposed on an upper bottom surface of the trapezoid, the light emitting surface 113 is formed with the bump structure 140.

By forming the bump structure 140 on the light-emitting surface 113, the light-emitting surface per unit area can be increased, so that the light can be emitted without glare.

The specific shape of the bump structure 140 formed on the light exit surface 113 is not limited. Illustratively, the bump structures 140 described above have a shape of a hemisphere, a polyhedron, or the like.

Further, referring to fig. 6 to 8, in some embodiments of the present application, the light guide part 110 has a tubular shape; the reflection surface 112 and the light-emitting surface 113 are disposed opposite to each other, and the reflection surface 112 and the light-emitting surface 113 surround to form a circumference of the tubular light guide portion.

For example, referring to fig. 6 to 8, the reflection surface 112 and the light exit surface 113 respectively occupy half of the entire circumference of the tubular light guide part 110. The light guide 110 has a cylindrical shape as a whole.

Further, the light source 120 is disposed at an end of the tubular light guide portion, and incident light emitted from the light source 120 is incident from an end surface of the tubular light guide portion.

The light source 120 is arranged to be incident from two opposite end surfaces of the tubular light guide part 110, and the incident direction of the incident light emitted by the light source 120 is not parallel to the reflection surface of the light guide part 110 and is not perpendicular to the light entering the light guide part 110, and the incident light is reflected by the reflection film 130, reaches the scattering point 111, is scattered, and is emitted from the light emitting surface 113, so that the light scattering effect can be improved, and the illumination is uniform. Moreover, since the light-emitting surface 113 of the tubular light guide part 110 is a part of the peripheral surface (itself, a cambered surface), the light-emitting surface per unit area can be increased, and the light can be emitted without glare. Further, in other alternative embodiments of the present application, the light source 120 may be selectively disposed on one end surface of the tubular light guide portion 110.

Further, referring to fig. 4 and 5, the lighting device 100 includes a light-absorbing part 150; the light source 120 is disposed in the light-collecting part 150.

The incident light from the light source 120 is emitted from the light-receiving portion 150, and then enters the light guide portion 110 through the light-incident surface 117 of the light guide portion 110.

By providing the light-absorbing portion 150 and disposing the light source 120 inside the light-absorbing portion 150, light can enter the light guide portion 110 at different incident angles, so that incident light is more uniform, which is further beneficial to obtaining uniform light emission.

Further, in some embodiments of the present disclosure, the light-absorbing portion 150 has a light-emitting surface; the light-emitting surface is formed by a plurality of curved surface polygons in an enclosing manner; or the light-emitting surface is formed by a plurality of plane polygons in a surrounding mode.

The light-emitting surface of the light-absorbing part 150 is formed by a plurality of curved polygons; or the light-emitting surface is formed by enclosing a plurality of plane polygons, so that incident light with different incident angles can enter the light guide part 110, the incident light is more uniform, subsequent scattering is facilitated, more uniform light emission is obtained, and the uniformity of illumination is improved.

Further, in some examples of the present application, the light emitting surface of the light absorbing part 150 may include at least two curved surface polygons or planar polygons.

Referring to fig. 4 and 5, in the illustrated embodiment, the light emitting surface of the light-absorbing part 150 is composed of 6 planar polygons, which are sequentially referred to as a first surface 151, a second surface 152, a third surface 153, a fourth surface 154, a fifth surface 155, and a sixth surface 156.

Referring to fig. 4, after the LED light source emits light, part of the light enters the light guide part 110 from the first surface 151 of the light-receiving part 150, and at this time, the incident light entering the light guide part 110 from the first surface 151 reaches the reflective film 130, and then reflected light at a first angle is obtained; the incident light entering the light guide 110 from the second surface 152 reaches the reflective film 130, and then reflected light at a second angle is obtained; the incident light entering the light guide 110 from the third surface 153 reaches the reflective film 130, and then reflected light at a third angle is obtained; the incident light entering the light guide 110 from the fourth surface 154 reaches the reflective film 130, and then reflected light at a fourth angle is obtained. Therefore, at least four reflected lights with different angles reach the scattering points 111 inside the light guide part 110, and the scattering effect inside the light guide part 110 is greatly increased. In fig. 4, the light entering the light guide section 110 from the first surface 151 to the fourth surface 154 reaches the reflective film 130 with a 0 ° reference line parallel to the reflective film 130 and a small angle (light entering the reflective film 130 from the first surface 151 to the fourth surface 154) with respect to the 0 ° reference line, and reflected light is obtained by reflection by the reflective film 130; the angle range far from the reflective film 130 relative to the 0 ° reference line is a large angle (the light entering the light guide portion 110 from the fifth surface 155 and the sixth surface 156) and cannot reach the reflective film 130, and may directly enter the scattering point 111 inside the light guide portion 110 for scattering or directly pass through the light exit surface 113; in the illustrated embodiment, most of the light can reach the reflective film 130 (the light entering the light guide unit 110 from the first surface 151 to the fourth surface 154), and is reflected by the reflective film 130 and then enters the light guide unit 110, so that the probability of reaching the scattering point 111 is increased, the scattering effect is improved, and the uniformity of the light is improved. It should be noted that when the density of the scattering points 111 inside the light guide part 110 is sufficiently large, the light directly penetrating through the light exit surface 113 is greatly reduced or even ignored.

Further, in some embodiments of the present application, the lighting device 100 includes: the case 160, the light guide 110, and the light source 120 are enclosed in the case 160.

Exemplarily, referring to fig. 2, in the illustrated embodiment, the LED light source is mounted on the light source substrate 121, and the light source substrate 121 and the light guide part 110 are enclosed in the case 160.

By encapsulating the light guide part 110 and the light source 120 in the housing 160, the light emitted by the light source 120 can enter the light guide part 110 only from the side surface of the light guide part 110, and at least part of the incident light is reflected by the reflective film 130, reaches the scattering point 111, is scattered, and then is emitted from the light emitting surface 113, thereby achieving the illumination effect.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An illumination device, comprising:

a light source, wherein incident light emitted by the light source can enter the light guide part, and the incident direction of the incident light is not parallel to or perpendicular to the reflecting surface of the light guide part; at least part of the reflected light of the incident light can reach the area where the scattering point is located.

2. The lighting device of claim 1,

the light guide part is made of transparent solid materials, and the scattering points are bubble-shaped cavities inside the light guide part.

3. A lighting device as recited in claim 1 or claim 2,

the lighting device comprises a light-absorbing part; the light source is arranged in the light-absorbing part;

the light guide part is arranged in the light guide part and is used for guiding the light emitted by the light source to the light-emitting part.

4. A lighting device as recited in claim 3,

the light-absorbing part is provided with a light-emitting surface;

the light-emitting surface is formed by a plurality of curved surface polygons in a surrounding mode; or the light-emitting surface is formed by a plurality of plane polygons in a surrounding mode.

5. The lighting device of claim 1,

the light guide part is plate-shaped and trapezoidal; two opposite surfaces of the plate-shaped light guide part are a light emergent surface and a reflecting surface;

the light emitting surface is arranged on the upper bottom surface of the trapezoid body.

6. The lighting device of claim 5,

the light sources are arranged on two opposite side surfaces of the plate-shaped light guide part.

7. A lighting device as recited in claim 5 or claim 6,

and the light-emitting surface is provided with a convex point structure.

8. The lighting device of claim 1,

the light guide part is tubular; the reflecting surface and the light-emitting surface are oppositely arranged and enclose to form the peripheral surface of the tubular light guide part;

the light source is disposed at an end of the tubular light guide portion, and incident light emitted from the light source is incident from an end surface of the tubular light guide portion.

9. A lighting device as recited in claim 1, wherein said lighting device comprises:

a housing, the light guide portion and the light source being enclosed within the housing.

10. A lighting device as recited in claim 9, wherein said light source comprises an LED light source and a light source substrate, said LED light source being mounted on said light source substrate, said light source substrate being enclosed within said housing.