CN109185736B

CN109185736B - Light distribution element, light source module, light source assembly and lighting fixture

Info

Publication number: CN109185736B
Application number: CN201811080118.4A
Authority: CN
Inventors: 李扬; 谢建民
Original assignee: Opple Lighting Co Ltd; Suzhou Op Lighting Co Ltd
Current assignee: Opple Lighting Co Ltd; Suzhou Op Lighting Co Ltd
Priority date: 2018-09-17
Filing date: 2018-09-17
Publication date: 2024-11-22
Anticipated expiration: 2038-09-17
Also published as: CN109185736A

Abstract

The present invention discloses a light distribution element, a light source module, a light source assembly and a lighting fixture. The light distribution element has a light-emitting unit accommodating space (111a) and a light-entering surface (111b) and a light-emitting surface (111c) respectively located on both sides of the light distribution element. The inner wall of the light-emitting unit accommodating space (111a) is the light-entering surface (111b); the light-emitting surface (111c) is a revolving surface, the revolving direction of the light-emitting surface (111c) is the direction surrounding the light-entering surface (111b), and the light-entering surface (111b) is a non-revolving surface in the revolving direction. After adopting the light distribution element, uniform light emission of the lighting fixture can be achieved without increasing the number of light distribution elements. At the same time, the weight of the light distribution element is relatively small, so the lighting fixture adopting the light distribution element has the characteristic of low cost.

Description

Light distribution element, light source module, light source assembly and lighting lamp

Technical Field

The invention relates to the technical field of lighting devices, in particular to a light distribution element, a light source module, a light source assembly and a lighting lamp.

Background

With the increasing demands of people on environmental illumination, the performance of the illumination lamp is also greatly improved. Currently, many types of lighting lamps are provided, in which light emitting units (for example, LED light emitting units) are arranged, and light distribution elements are covered on the light emitting units to realize the divergent emission of light.

Taking a linear lamp as an example, a conventional linear lamp is generally in a strip structure, and in order to ensure that the linear lamp emits light uniformly, the following two schemes can be generally adopted:

according to the first scheme, a large number of light-emitting units are uniformly distributed on the circuit board, so that the distance between adjacent light-emitting units is smaller, and the effect of uniform light emission is achieved. With this scheme, the cost of such a linear lamp is high because the number of light emitting units is large and the width of the circuit board is large.

In the second embodiment, a stretching lens is used to expand the irradiation range of the light emitting unit. When the scheme is adopted, the number of the light emitting units and the width of the circuit board can be reduced, but the weight of the stretching lens is large, and the assembly, maintenance and the like of the linear lamp are also adversely affected, so that the cost of the linear lamp is still high.

It can be seen that the conventional linear lamp has a problem of high cost. Of course, the above-described problems also exist in other kinds of lighting fixtures.

Disclosure of Invention

The invention discloses a light distribution element, a light source module, a light source assembly and a lighting lamp, which are used for reducing the cost of the lighting lamp.

In order to solve the problems, the invention adopts the following technical scheme:

the light distribution element is provided with a light emitting unit accommodating space, a light incident surface and a light emergent surface which are respectively positioned at two sides of the light distribution element, and the inner wall of the light emitting unit accommodating space is the light incident surface;

the light-emitting surface is a rotation surface, the rotation direction of the light-emitting surface is a direction surrounding the light-entering surface, and the light-entering surface is a non-rotation surface in the rotation direction.

The light source module comprises a circuit board, a light distribution element and a light emitting unit, wherein the light distribution element is the light distribution element, the light emitting unit is arranged on the circuit board and is positioned in the light emitting unit accommodating space, and the circuit board is fixed with the light distribution element.

A light source assembly comprises a base and a light source module arranged on the base, wherein the light source module is the light source module.

The utility model provides a lighting lamp, includes optical face guard, driver and above-mentioned light source subassembly, the driver with the light source subassembly all set up in optical face guard below, the driver with the circuit board electricity is connected.

The technical scheme adopted by the invention can achieve the following beneficial effects:

The light emergent surface of the light distribution element is a rotating surface, and the light incident surface of the light distribution element is a non-rotating surface, so that the light passing through the light distribution element shows directivity, and when the installation state of the light distribution element changes, the illumination effect brought by the light distribution element also changes. Therefore, when the illumination lamp is designed, the installation state of the light distribution element can be flexibly adjusted according to the width of the lamp, so that the illumination effect generated by the light distribution element is better matched with the width of the lamp, and finally, the purpose of uniform light emission of the illumination lamp is achieved. After the light distribution element is adopted, the uniform light emission of the illumination lamp can be realized without increasing the number of the light distribution elements, and meanwhile, the weight of the light distribution element is smaller, so that the illumination lamp adopting the light distribution element has the characteristic of lower cost.

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 an exploded view of a lighting fixture according to an embodiment of the present invention;

FIG. 2 is a side view of a portion of the structure of a lighting fixture disclosed in an embodiment of the present invention;

FIG. 3 is a top view of the structure shown in FIG. 2;

FIG. 4 is a schematic view of a partial enlarged structure of FIG. 3;

FIG. 5 is a cut-away view of the structure of FIG. 4 along a first side (i.e., the A-A direction);

FIG. 6 is a cut-away view of the structure of FIG. 4 along a second side (i.e., B-B direction);

FIG. 7 is a side view of a portion of the structure of a lighting fixture according to another embodiment of the present invention;

FIG. 8 is a top view of the structure shown in FIG. 7;

FIG. 9 is a schematic view of a partial enlarged structure of FIG. 8;

FIG. 10 is a side view of a portion of the structure of a lighting fixture according to yet another embodiment of the present invention;

FIG. 11 is a top view of the structure shown in FIG. 10;

FIG. 12 is a schematic view of a partially enlarged structure of FIG. 11;

FIG. 13 is a side view of a portion of the structure of a lighting fixture according to yet another embodiment of the present invention;

FIG. 14 is a top view of the structure shown in FIG. 13;

FIG. 15 is a schematic view of a partially enlarged structure of FIG. 14;

FIG. 16 is a side view of a portion of the structure of a lighting fixture disclosed in another embodiment of the invention;

FIG. 17 is a top view of the structure shown in FIG. 16;

fig. 18 is a partially enlarged schematic view of the structure of fig. 17.

Reference numerals illustrate:

100-light source assembly, 110-light source module, 111-grading component, 111 a-light emitting unit accommodation space, 111 b-light incident surface, 111 c-light emergent surface, 111 ca-lateral extension surface, 111 cb-transitional connection surface, 111 cc-longitudinal extension surface, 111 d-first surface, 111 e-second surface, 112-circuit board, 113-light emitting unit, 120-base, 121-base, 122-reflection part, 122 a-reflection surface, 200-diffusion mask, 300-first end cover, 400-second end cover.

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.

The technical scheme disclosed by each embodiment of the invention is described in detail below with reference to the accompanying drawings.

As shown in fig. 1-6, an embodiment of the present invention discloses a lighting fixture, which includes an optical mask, a driver (not shown in the figures), a light source assembly 100, a first end cap 300 and a second end cap 400, wherein the optical mask is used for protecting other parts of the lighting fixture, and at the same time, guaranteeing the aesthetic property of the lighting fixture. The driver is used to supply power to the light source assembly 100 so that the light source assembly 100 can emit light. The driver and the light source assembly 100 are disposed below the optical mask, and light emitted from the light source assembly 100 can pass through the optical mask. The first and second end caps 300 and 400 may be mounted to both ends of the light source assembly 100 and the optical mask, respectively, to form an enclosed space. The lighting lamp disclosed by the embodiment of the invention can be a linear lamp, a ceiling lamp and the like.

The light source assembly 100 includes a base 120 and a light source module 110 mounted on the base 120, wherein the base 120 serves as a mounting base of the light source module 110, and the light source module 110 serves as a main body of the light source assembly 100 to emit light.

The light source module 110 may specifically include a circuit board 112, a light distribution element 111, and a light emitting unit 113. The circuit board 112 is electrically connected to the aforementioned driver so that the driver can supply the circuit board 112 with electric power required for light emission. The light emitting unit 113 is disposed on the circuit board 112, so that the circuit board 112 may supply power to the light emitting unit such that the light emitting unit 113 emits light, and the light emitting unit 113 may be preferably an LED light emitting unit. The light distribution element 111 may be fixed on the circuit board 112, and may adopt reflection, refraction, and other forms to adjust parameters such as direction of the light emitted by the light emitting unit 113, so that the light emitting effect of the whole lighting fixture meets the requirement. In a specific embodiment, the light distribution element 111 may employ a lens.

The light distribution element 111 has a light emitting unit accommodation space 111a, and a light incident surface 111b and a light emitting surface 111c located on both sides thereof, respectively. The light emitting unit accommodating space 111a is used for accommodating the light emitting unit 113, and the inner wall of the light emitting unit accommodating space is the light incident surface 111b, so that the light emitted by the light emitting unit 113 reaches the light incident surface 111b first, and the light is reflected or refracted in the light distribution element 111 and then is emitted from the light emitting surface 111c. In the embodiment of the present invention, the light emitting surface 111c is a rotation surface, the rotation direction thereof is a direction surrounding the light entering surface 111b, and the light entering surface 111b is a non-rotation surface in the rotation direction. Therefore, the light transmitted through the light distribution element 111 exhibits directivity, and when the mounting state of the light distribution element 111 is changed, the illumination effect thereof is also changed.

Therefore, when the lighting lamp is designed, the installation state of the light distribution element 111 can be flexibly adjusted according to the width of the lamp, so that the lighting effect generated by the light distribution element 111 is better matched with the width of the lamp, and finally, the purpose of uniform light emission of the lighting lamp is achieved. After the light distribution element 111 is adopted, uniform light emission of the illumination lamp can be realized without increasing the number of the light distribution elements 111, and meanwhile, the weight of the light distribution element 111 is smaller, so that the illumination lamp adopting the light distribution element 111 has the characteristic of lower cost.

The light emitted from the light emitting unit 113 passes through the light distribution element 111 to form a light spot, and the specific shape of the light spot may be a circle, an ellipse, a triangle, a rectangle, or the like. It should be noted that, the shape of the light spot may be designed according to the overall shape of the lighting fixture, for example, if the overall shape of the lighting fixture is circular, the shape of the light spot may be set to be circular, so as to meet the requirement of uniform light emission. For a rectangular lighting fixture, such as a linear lamp, the light spot formed by the light source module 110 may be set to a rectangular light spot.

In order to more accurately adjust the installation state of the light distribution element 111, the light emitting effect of the lighting fixture is better matched with the width of the light distribution element, so that the light emitting effect of the lighting fixture is optimized, and the structure of the light incident surface 111b can be further more regular. Specifically, as shown in fig. 4, in the embodiment of the present invention, the light incident surface 111b has a symmetrical structure with respect to the first surface 111d and the second surface 111e that perpendicularly intersect. At this time, after the light enters through the light incident surface 111b and finally exits from the light emergent surface 111c, the light will have a certain symmetry with respect to both the first surface 111d and the second surface 111e, so as to achieve the above-mentioned effects.

Further, the intersection line of the first surface 111d and the second surface 111e may be collinear with the rotation axis of the light emitting surface 111c, at this time, the geometric center line of the light entering surface 111b and the light emitting surface 111c is parallel to the optical axis of the light emitting unit 113, so that the light emitted by the light emitting unit 113 passes through the light distribution element 111 and then shows more obvious regularity in the rotation direction of the light emitting surface 111c, so as to enhance the foregoing technical effects.

In a specific embodiment, with continued reference to fig. 4, in a section perpendicular to the rotation axis of the light exit surface 111c, the light entrance surface 111b has an elliptical section. At this time, the distribution rule of the light passing through the light distribution element 111 is substantially consistent with the structural characteristic of the elliptical cross section, and may be, in particular, brighter in the minor axis direction and darker in the major axis direction of the elliptical cross section. Meanwhile, in the rotation direction of the light-emitting surface 111c, the brightness change of the light tends to be uniform, so that the light basically does not have larger mutation, and the illumination uniformity of the illumination lamp is further improved.

More specifically, a cross section at the lower end opening of the light incident surface 111b is defined as a lower end cross section perpendicular to the rotation axis of the light exit surface 111c, and a major axis size of the lower end cross section may be 11mm, a minor axis size may be 4.6mm, and a maximum concave depth of the light incident surface 111b may be set to 3.4mm. The maximum diameter of the light-emitting surface 111c was 14mm, and the maximum height (the height is the dimension in the direction of the rotation axis of the light-emitting surface 111 c) was 5.2mm. After the structural parameters are set in this way, the luminous effect of the lighting lamp is more outstanding.

When the light incident surface 111b has the above-mentioned elliptical cross section, the major axis length and the minor axis length of the elliptical cross section may not change or may monotonically increase in the direction close to the top of the light incident surface 111b (the direction may be parallel to the optical axis of the light emitting unit 113), but both structures may cause a large abrupt change in the direction close to the top of the light incident surface 111b after the light passes through the light distribution element 111, which is not beneficial to ensuring the illumination uniformity of the lighting fixture. Accordingly, the major axis length and the minor axis length of the elliptical cross section can be monotonically decreased in the aforementioned direction, and the light incident surface 11b has a curved surface structure that smoothly transitions in the direction approaching the top of the light incident surface 111 b.

In order to obtain a better light distribution effect, the curvature radius of the light exit surface 111c may be gradually reduced and then gradually increased from the center of the light exit surface 111c to the edge thereof. When the curvature radius of the light-emitting surface 111c is reduced, the deflection of the light ray is increased, so that the light ray is properly expanded, and a larger light-emitting range is obtained; when the radius of curvature of the light exit surface 111c increases, the deflection of the light beam decreases, so that the light beam is properly converged and prevented from being irradiated to a place where the light beam is not required. Therefore, with this structure, the light emitted by the light emitting unit 113 can be better utilized, and the uniformity of the light output can be improved.

In a further embodiment, as shown in fig. 5 and 6, the light emitting surface 111c may include a laterally extending surface 111ca, a transitional surface 111cb, and a longitudinally extending surface 111cc, where the laterally extending surface 111ca is in arc-shaped transitional connection with the longitudinally extending surface 111cc through the transitional surface 111 cb. The curvature of the lateral extension surface 111ca and the longitudinal extension surface 111cc changes little, the curvature of the transition connection surface 111cb changes comparatively much, and the curvature radius of the entire light-emitting surface 111c tends to decrease substantially gradually from the lateral extension surface 111ca to the transition connection surface 111cb, and tends to increase substantially gradually from the transition connection surface 111cb to the longitudinal extension surface 111 cc. This trend makes the light emission range and the light emission uniformity of the light distribution element 111 ideal.

The light incident surface 111b may be a light surface, but considering that after the light incident surface is a light surface, the light is relatively concentrated, which is easy to cause the problem that the light is still uneven after passing through the light distribution element 111, the embodiment of the invention provides a frosted light mixing pattern on the light incident surface 111b, and the frosted light mixing pattern may be formed by a process such as sand blasting, and has an uneven characteristic, so that the light is more dispersed after passing through the light incident surface 111b, thereby solving the foregoing problem.

In the single light distribution element 111, only one light emitting unit 113 may be provided in the light emitting unit accommodation space 111a, or at least two light emitting units 113 may be provided. When the latter scheme is adopted, as described above, since the light incident surface 111b of the light distribution element 111 is a non-rotation surface, the light transmitted through the light distribution element 111 exhibits directivity, so that at least two light emitting units 113 can be arranged in the direction with larger size of the light incident surface 111b, so that the arrangement form of the light emitting units 113 is consistent with the structural characteristics of the light incident surface 111b, the problem of insufficient brightness in the direction with larger size of the light incident surface 111b is prevented, and the uniformity of the light is further higher.

The single light source module 110 may be provided with only one light distribution element 111, or may be provided with a plurality of light distribution elements 111, and in order to obtain a larger irradiation range, the light distribution elements 111 may be provided in plurality, and each light distribution element 111 may be provided on the circuit board 112 at intervals. Each light distribution element 111 may be covered by at least one light emitting unit 113 or may be covered by a plurality of light emitting units 113, and at this time, the plurality of light emitting units 113 covered by the same light distribution element 111 form a light emitting unit group, and the plurality of light emitting unit groups corresponding to the plurality of light distribution elements 111 are arranged on the circuit board 112 at the same interval. Along with the increasing number of the light emitting unit groups, the irradiation range of the light source module is increased.

In order to make the light emitted by the light source module 110 more uniform, the following scheme is adopted in the embodiment of the application: in the single light emitting cell group, the interval between the adjacent light emitting cells 113 is a first interval, the interval between the adjacent light emitting cell groups is a second interval, and the first interval is smaller than the second interval. That is, the light emitting units 113 in the light emitting unit accommodating space 111a are arranged relatively concentrated so that the light emitted from the single light source module 110 is brighter; the luminous unit groups are arranged relatively in a scattered manner, so that the light emitted by the whole lighting lamp is relatively soft and does not hurt eyes of a user.

Further, the ratio between the second interval and the first interval can be set to 60-150, so that the lighting effect of the lighting lamp is better. Specifically, the first pitch may be a minimum distance between edges of the adjacent light emitting units 113, which may be set to 0.5 to 1mm, and the second pitch may be a minimum distance between edges of the adjacent light distribution elements 111, which may be set to 62 to 66mm.

The circuit board 112 may be provided in a bar-shaped structure so as to mount the plurality of light emitting units 113 and the light distribution elements 111. The lighting fixtures employing such circuit boards 112 may be linear lamps. As described above, the light transmitted through the light distribution element 111 has a certain directivity, so that the overall structure formed by the light distribution element 111 and the light emitting unit 113 is disposed on the circuit board 112, which directly affects the lighting effect of the lighting fixture. Specifically, when the space occupied by the light distribution element 111 and the light emitting unit 113 in the width direction of the illumination lamp is changed, the illumination effect of the illumination lamp is changed. Therefore, the included angles between the light distribution element 111 and the extending direction of the light emitting unit 113 and the circuit board 112 may be correspondingly set according to the lamp width, and the included angles may be defined as light distribution included angles. That is, the light distribution included angle is a preset included angle related to the width of the lamp, and can be changed between 0 and 90 degrees.

In a specific embodiment, the smaller the lamp width is, the larger the light distribution angle is. When the width of the lamp is 150-220 mm, the light distribution included angle can be 0 degree; when the width of the lamp is 120-150 mm, the light distribution included angle can be 5-10 degrees; when the width of the lamp is 90-120 mm, the light distribution included angle can be 20-80 degrees; when the width of the lamp is 60-90 mm, the light distribution included angle can be 90 degrees. It should be noted that, in the range of the width of the lamp described herein, the repeated endpoint value may be selected from one of the numerical ranges where it is located, and then the numerical value of the light distribution included angle is selected.

As shown in fig. 2-4, the width of the lighting lamp is 200mm, and the light distribution angle is 0 degree; as shown in fig. 7-9, the width of the lighting lamp is 150mm, and the light distribution angle is 0 degree; as shown in fig. 10-12, the width of the lighting lamp is 120mm, and the light distribution angle is 5-10 degrees; as shown in fig. 13-15, the width of the lighting lamp is 90mm, and the light distribution angle is 90 degrees; as shown in fig. 16 to 18, the width of the illumination lamp is 60mm, and the light distribution angle is 90 °.

In the light source assembly 100, the chassis 120 may include a base 121 and a reflective portion 122 disposed on the base 121, the light source module 110 is mounted on the base 121, and the reflective portion 122 has a reflective surface 122a facing the light source module 110. The base 121 and the reflecting portion 122 may each have a plate-like structure. Some of the light emitted from the light emitting unit 113 may be directly emitted, and the other may be irradiated onto the reflecting surface 122a of the reflecting portion 122, and the reflecting surface 122a reflects the light, so that the light is finally emitted. Therefore, when the base 120 is adopted, the light is emitted from the light distribution element 111 again and then changed in direction due to the reflection of the reflecting portion 122, so that the light emitted from the light source assembly 100 is more uniform.

In order to further enhance the aforementioned technical effect, two reflection portions 122 may be provided, and the two reflection portions 122 are respectively located at opposite sides of the light source module 110. At this time, the light emitting unit 113 is located between the two reflecting portions 122, so that the two reflecting portions 122 can reflect more light emitted by the light emitting unit 113, the reflection efficiency of the light is improved, and the lighting effect of the whole lighting fixture is better.

The shape of the reflecting surface 122a can be flexibly selected according to practical requirements, for example, the reflecting surface 122a can be set to be a plane, a wavy curved surface, a zigzag curved surface, etc., and when the reflecting surface 122a is a plane, firstly, the lighting effect of the lighting lamp is more conveniently controlled, and secondly, the processing is more conveniently carried out, so that in the embodiment of the invention, the reflecting surface 122a is preferably a plane.

After the reflecting portion 122 is disposed, the inclination degree of the reflecting portion 122 relative to the base 121 is the slope of the reflecting surface 122a, and different luminous effects will be generated when the slope is different, that is, the slope of the reflecting portion 122 can be adaptively set according to different widths of the lighting lamp, so as to improve the illumination uniformity of the lighting lamp. Therefore, in the embodiment of the invention, the slope of the reflecting surface 122a is a preset slope related to the width of the lamp. The value of the preset slope is the tangent of the remaining angle of the inclined angle α formed between the reflecting surface 122a and the optical axis of the light emitting unit 113, so the purpose of adjusting the slope of the reflecting surface 122a can be achieved by designing the value of the inclined angle α. In particular, this inclination angle α may be selected between 0 and 90 ° (excluding 0 ° and 90 °).

The base 120 may be formed by an aluminum extrusion molding process, so as to facilitate one-time molding of the base 120, and simultaneously facilitate adjustment of the slope of the reflecting surface 122a, thereby improving the processing precision and structural strength of the base 120.

In a specific embodiment, in order to achieve uniform light emission, when the width of the lamp is smaller, the inclination angle α may be smaller, and the complementary angle of the inclination angle α may be larger. When the width of the lamp is 150-220 mm, the slope of the reflecting surface 122a is tan 25-tan 30 degrees; when the width of the lamp is 120-150 mm, the slope of the reflecting surface 122a is tan 35-tan 40 degrees; when the width of the lamp is 90-120 mm, the slope of the reflecting surface 122a is tan 40-tan 45 degrees; when the lamp width is 60-90 mm, the slope of the reflecting surface 122a is tan 50-tan 55 degrees; when the lamp width is 50-60 mm, the slope of the reflecting surface 122a is tan 75-tan 80. It should be noted that, in the range of the width of the lamp described herein, the repeated endpoint value may be selected from one of the numerical ranges where it is located, and then the numerical value of the light distribution included angle is selected.

Specifically, as shown in fig. 2-4, the width of the lighting lamp is 200mm, and the complementary angle of the inclined included angle alpha is 25-30 degrees; as shown in fig. 7-9, the width of the lighting lamp is 150mm, and the complementary angle of the inclined included angle alpha is 35-40 degrees; as shown in fig. 10-12, the width of the lighting lamp is 120mm, and the complementary angle of the inclined included angle alpha is 40-45 degrees; as shown in fig. 13-15, the width of the lighting lamp is 90mm, and the complementary angle of the inclined included angle alpha is 50-55 degrees; as shown in fig. 15-18, the width of the lighting lamp is 60mm, and the complementary angle of the inclined included angle alpha is 75-80 degrees.

Through the technical schemes, the illumination lamp provided by the embodiment of the invention can obtain ideal light-emitting uniformity within the width range of 50-220 mm, so that the width of the illumination lamp can be flexibly set within the range of 50-220 mm. The above-described width range is obtained with the optical height of the illumination lamp, which refers to the distance between the light emitting unit 113 and the optical mask, being unchanged, and may be set to 35mm.

In a specific embodiment, for a linear lamp with a length of 1200mm, a width of 150mm and a height of 40mm, the number of light distribution elements 111 may be 18, the light distribution elements 18 are uniformly arranged on the circuit board 112, each light distribution element 111 is covered with two LED light emitting units with a power of 1W, and the total lamp power may be set to 36W. The brightness of the light-emitting surface of the lighting lamp is uniform, and the cost is relatively low.

In an alternative embodiment, the optical mask of the lighting device may specifically be a diffusion mask 200, where the diffusion mask 200 is mounted on the base 120, and the diffusion mask 200, the reflecting portion 122, and the base 121 together enclose an optical space, and the light source module 110 is located in the optical space. Up to this point, the light emitted from the light emitting unit 113 may be reflected by the reflecting portion 122 and may be diffused by the diffusion mask 200, so that the light is more uniformly emitted. The diffusion mask 200 may be formed by adding a concentration of diffusion particles to a transparent substrate, which may be made of a transparent optical grade PC (Polycarbonate) or a transparent optical grade PMMA (polymethyl methacrylate ) to achieve a better light homogenizing effect. Of course, the transparent substrate may also be made of PS (Polystyrene ), PP (Polypropylene), or other materials.

The transmittance of the diffusion mask 200 may affect the light emitting effect of the lighting fixture, when the transmittance is too low, the light emitting efficiency of the lighting module is low, and when the transmittance is too high, the diffusion mask 200 cannot effectively shield the light emitting unit 113, so that the brightness of the light emitting surface of the lighting fixture is uneven. Based on this, the embodiment of the present invention sets the primary transmittance of the diffusion mask 200 to 50% to 55%.

The foregoing embodiments of the present invention mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in view of brevity of line text, no further description is provided herein.

The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the scope of the claims of the present invention.

Claims

1. The light source module is characterized by comprising a circuit board (112), a light distribution element (111) and a light emitting unit (113), wherein the light distribution element is provided with a light emitting unit accommodating space (111 a) and a light incident surface (111 b) and a light emergent surface (111 c) which are respectively positioned at two sides of the light distribution element, the light emitting unit (113) is arranged on the circuit board (112) and positioned in the light emitting unit accommodating space (111 a), the circuit board (112) is fixed with the light distribution element (111), and the inner wall of the light emitting unit accommodating space (111 a) is the light incident surface (111 b);

The light-emitting surface (111 c) is a rotation surface, the rotation direction of the light-emitting surface (111 c) is a direction surrounding the light-entering surface (111 b), and the light-entering surface (111 b) is a non-rotation surface in the rotation direction;

the circuit board is of a strip-shaped structure, an included angle between the light distribution element (111) and the extending direction of the light emitting unit (113) and the circuit board (112) is a light distribution included angle, the light distribution included angle is correspondingly set according to the width of the lamp, and the smaller the width of the lamp is, the larger the light distribution included angle is.

2. The light source module according to claim 1, wherein the light incident surface (111 b) has a symmetrical structure with respect to the first surface (111 d) and the second surface (111 e) which vertically intersect.

3. A light source module according to claim 2, characterized in that the intersection of the first face (111 d) and the second face (111 e) is collinear with the rotation axis of the light exit face (111 c).

4. A light source module as claimed in claim 2, characterized in that, in a section perpendicular to the rotation axis of the light exit surface (111 c), the section of the light entrance surface (111 b) is an elliptical section.

5. The light source module according to claim 4, wherein the major axis length and the minor axis length of the elliptical cross section each monotonically decrease in a direction approaching the top of the light entrance surface (111 b).

6. A light source module as claimed in claim 1, characterized in that the curvature radius of the light exit surface (111 c) decreases gradually from the center of the light exit surface (111 c) to the edge thereof and increases gradually.

7. The light source module according to claim 6, wherein the light exit surface (111 c) includes a laterally extending surface (111 ca), a transitional connection surface (111 cb), and a longitudinally extending surface (111 cc), and the laterally extending surface (111 ca) is arc-shaped and transitionally connected to the longitudinally extending surface (111 cc) through the transitional connection surface (111 cb).

8. The light source module according to claim 1, wherein the light entrance surface (111 b) is provided with frosted light mixing patterns.

9. The light source module according to any one of claims 1 to 8, wherein the light distribution element is a lens.

10. The light source module of claim 1, wherein the light source module is configured to form a rectangular light spot.

11. The light source module according to claim 1, wherein a plurality of the light distribution elements (111) are provided, and each of the light distribution elements (111) is disposed on the circuit board (112) at an interval.

12. The light source module according to claim 11, wherein at least two light emitting units (113) are disposed in the light emitting unit accommodating space (111 a), and a plurality of light emitting units (113) covered by the same light distribution element (112) form a light emitting unit group.

13. The light source module according to claim 12, wherein in the single light emitting unit group, a pitch between adjacent light emitting units (113) is a first pitch, a pitch between adjacent light emitting unit groups is a second pitch, and the first pitch is smaller than the second pitch.

14. The light source module of claim 13, wherein a ratio between the second pitch and the first pitch is 60-150.

15. The light source module of claim 1, wherein:

the width of the lamp is 150-220 mm, and the light distribution included angle is 0 degree; or alternatively

The width of the lamp is 120-150 mm, and the light distribution included angle is 5-10 degrees; or alternatively

The width of the lamp is 90-120 mm, and the light distribution included angle is 20-80 degrees; or alternatively

The width of the lamp is 60-90 mm, and the light distribution included angle is 90 degrees.

16. A light source assembly, comprising a base (120) and a light source module (110) mounted on the base (120), the light source module (110) being the light source module (110) of any one of claims 1-15.

17. The light source assembly according to claim 16, wherein the base (120) comprises a base (121) and a reflecting portion (122) disposed on the base (121), the light source module (110) is mounted on the base (121), and the reflecting portion (122) has a reflecting surface (122 a) facing the light source module (110).

18. The light source assembly of claim 17, wherein the reflective surface (122 a) is planar and the slope of the reflective surface (122 a) is a predetermined slope related to the width of the luminaire.

19. A light source assembly as recited in claim 18, wherein:

the width of the lamp is 150-220 mm, and the slope is tan 25-tan 30 degrees; or alternatively

The width of the lamp is 120-150 mm, and the slope is tan 35-tan 40 degrees; or alternatively

The width of the lamp is 90-120 mm, and the slope is tan 40-tan 45 degrees; or alternatively

The width of the lamp is 60-90 mm, and the slope is tan 50-tan 55 degrees; or alternatively

The width of the lamp is 50-60 mm, and the slope is tan 75-tan 80 degrees.

20. The light source assembly according to claim 17, wherein the number of the reflecting portions (122) is two, and the two reflecting portions (122) are respectively located at two opposite sides of the light source module (110).

21. A lighting fixture characterized by comprising an optical mask, a driver and a light source assembly (100) according to any of claims 16-20, said driver and said light source assembly (100) being both arranged below said optical mask, said driver being electrically connected to said circuit board (112).

22. The lighting fixture of claim 21, wherein the optical mask is a diffusion mask (200), the diffusion mask (200) is mounted on the base (120), the base (120) comprises a base portion (121) and a reflecting portion (122), and the diffusion mask (200), the reflecting portion (122) and the base portion (121) together enclose an optical space, and the light source module (110) is located in the optical space.

23. A light fixture as recited in claim 22, wherein said diffusion mask (200) has a primary light transmittance of 50-55%.

24. A lighting fixture as recited in claim 21, wherein said lighting fixture is a linear lamp, said linear lamp having a width of from 50mm to 220mm.