CN220338298U

CN220338298U - Lighting device

Info

Publication number: CN220338298U
Application number: CN202321912775.7U
Authority: CN
Inventors: 张权
Original assignee: YLX Inc
Current assignee: YLX Inc
Priority date: 2023-07-19
Filing date: 2023-07-19
Publication date: 2024-01-12
Anticipated expiration: 2033-07-19

Abstract

The application discloses a lighting device, wherein the lighting device comprises a substrate, wherein the substrate comprises a central area and at least one layer of annular area surrounding the central area; a light source assembly; the light source assembly comprises a plurality of light emitting pieces, and the light emitting pieces are arranged in the central area and the annular area; the control circuit is used for controlling the luminous elements in different areas on the substrate to emit light; the luminous area of at least one luminous element arranged in the central area of the substrate is smaller than that of the luminous element in the annular area. According to the luminous light spot illuminating device, the luminous area of the luminous piece in different areas is designed, the luminous area of the luminous piece close to the central area is smaller than the luminous area of the luminous piece in the annular area, and the luminous piece with a small area can obtain smaller illuminating light spots after being processed by the optical system, so that the light spot illumination of a diaphragm is improved, and the illumination of the emergent light of the whole illuminating device is improved.

Description

Lighting device

Technical Field

The application belongs to the technical field of lighting devices, and particularly relates to a lighting device.

Background

Along with the increasing luminous efficiency and lower cost of LEDs, high-power LEDs comprehensively replace gas discharge bulbs and become the main stream of high-end stage lamps. The high-power LED light source is formed by combining multiple chips with small power, and the chip power of a single LED is not high. In stage lighting, in order to pursue high illuminance of an optical system, people often change the light emitting angle of stage lamps by adjusting the position of a projection lens, so as to improve the illuminance of the lamps.

In the current small-angle illumination output, part of light beams are not irradiated on the lens due to the adjustment of the projection lens, so that the light utilization rate and the illumination are low.

Disclosure of Invention

The application provides a lighting device to solve current lighting device and shine the lower problem of luminous piece utilization ratio and illuminance when the low angle, thereby improved lighting device's illumination efficiency, improved facula illuminance.

In order to solve the technical problems, one technical scheme adopted by the application is as follows: a lighting device, comprising:

a substrate comprising a central region and at least one annular region surrounding the central region;

a light source assembly; the light source assembly comprises a plurality of light emitting pieces, and the light emitting pieces are arranged in the central area and the annular area, wherein the light emitting area of at least one light emitting piece arranged in the central area of the substrate is smaller than that of the light emitting piece in the annular area;

the control circuit is used for controlling the luminous elements in different areas on the substrate to emit light;

the collecting lens comprises a first collecting lens and a second collecting lens, the first collecting lens is used for collecting light emitted by the luminous piece, and the second collecting lens is used for collimating the light emitted by the first collecting lens;

the light outlet lens is arranged on a light path of the light emitted by the second collecting lens;

and the light emitting lens is used for converging the light emitted by the second collecting lens to the diaphragm.

In one embodiment, the light emitting elements are arranged in concentric rings in the annular region, and one light emitting element is arranged in the central region.

In an embodiment, the annular region includes a first annular region, a second annular region, and a third annular region from inside to outside.

In an embodiment, the light emitting area of the light emitting element in the central area is smaller than the light emitting area of the light emitting element in the first annular area, the light emitting area of the light emitting element in the first annular area is smaller than the light emitting area of the light emitting element in the second annular area, and the light emitting area of the light emitting element in the second annular area is smaller than the light emitting area of the light emitting element in the third annular area.

In an embodiment, the light emitting area of the light emitting element in the central area is smaller than the light emitting areas of the light emitting elements in the first, second and third annular areas, and the light emitting areas of the light emitting elements in the second and third annular areas are the same.

In an embodiment, the light emitting areas of the light emitting elements in the central region and the first annular region are smaller than the light emitting areas of the light emitting elements in the second annular region and the third annular region, and the light emitting areas of the light emitting elements in the central region and the first annular region are the same, and the light emitting areas of the light emitting elements in the second annular region and the third annular region are the same.

In an embodiment, the light emitting areas of the light emitting elements in the central area, the first annular area and the second annular area are smaller than the light emitting areas of the light emitting elements in the third annular area, and the light emitting areas of the light emitting elements in the central area, the first annular area and the second annular area are the same, and the light emitting areas of the light emitting elements in the third annular area are the same.

In an embodiment, the light emitting area of the light emitting element in the central region is the smallest, and the light emitting areas of the light emitting elements in the first and second annular regions are larger than the light emitting area of the light emitting element in the central region, and the light emitting elements in the first and second annular regions are smaller than the light emitting area of the light emitting element in the third annular region.

In an embodiment, the central area is provided with light emitting elements of a first light emitting area, the first annular area and the second annular area are provided with light emitting elements of a second light emitting area and a third light emitting area, and the light emitting elements of different light emitting areas of the first annular area and the second annular area are arranged at intervals.

In an embodiment, the optical system further includes a projection lens, where the projection lens is located on an outgoing light path of the diaphragm.

The beneficial effects of this application are: in this application's scheme, through the light emitting area size of the light emitting part in the different regions of design, the light emitting part light emitting area who is close to central region is less than the light emitting area of the light emitting part of annular region, and the light emitting part of small tracts of land can obtain comparatively little illumination facula after processing through optical system, and little illumination facula can improve the facula illuminance of diaphragm department, and then promotes the illuminance of whole lighting device emergence light.

Drawings

For a clearer description of the technical solutions in the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic illustration of a first embodiment of a lighting device of the present application;

FIG. 2 is a schematic view of a partial light ring arrangement of a first embodiment of the lighting device of the present application;

FIG. 3 is a graph of angular distribution of LED chip light output in the third, second, and first annular regions and the center region of the lighting device of the present application;

FIG. 4 is a schematic view of a localized light ring arrangement of a second embodiment of the illumination device of the present application;

FIG. 5 is a schematic view of a localized light ring arrangement of a third embodiment of the illumination device of the present application;

FIG. 6 is a schematic view of a localized light ring arrangement of a fourth embodiment of the illumination device of the present application;

FIG. 7 is a schematic view of a localized light ring arrangement of a fifth embodiment of the illumination device of the present application;

fig. 8 is a schematic view of a localized light emitting ring arrangement of a sixth embodiment of the lighting device of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

Referring to fig. 1 and 2, fig. 1 is a schematic diagram of a first embodiment of a lighting device according to the present application, and fig. 2 is a schematic diagram of a partial lighting ring arrangement of the first embodiment of the lighting device according to the present application. In the first embodiment of the present application, the lighting device 1 includes: the light source assembly 3 comprises a plurality of light emitting pieces 301, and the plurality of light emitting pieces 301 are arranged in an array and connected to the same plate surface of the substrate 2.

The light emitting member 301 is an LED chip, in other embodiments, a light source may be provided for other components, and the light emitting surface of the LED chip may be pentagonal, hexagonal, octagonal, decagonal, circular or elliptical, and each LED chip is configured to emit a light beam with a certain angular distribution, which is not limited herein.

In the present embodiment, the substrate 2 includes a central region 201 and at least one annular region 202 surrounding the central region 201. At least one of the plurality of LED chips is mounted to the central region 201 of the substrate 2, and the remaining LED chips are mounted to at least one annular region 202. In this embodiment, the annular region 202 is a circular ring region surrounding the central region 201, and in other embodiments, the annular region 202 may be a rectangular ring region, a triangular ring region, or other polygonal annular regions according to the arrangement of the LED chips.

The light emitting area of at least one LED chip disposed in the central region 201 of the substrate is smaller than the light emitting area of at least one LED chip in the annular region 202. In this embodiment, the light emitting area of the LED chips disposed on the substrate becomes gradually larger from the center to the edge, that is, the light emitting area of the LED chips disposed in the center region 201 of the substrate is smallest, and the light emitting area of the LED chips in the annular region extending outward from the center region becomes gradually larger, wherein the light emitting areas of the LED chips in the same annular region are the same in size.

The substrate 2 may be a PCB (Printed Circuit Board ) or an MCPCB board (Metal Core Printed Circuit Board, metal-based printed circuit board). The material can also be aluminum, silicon, polymer material or composite material. In this embodiment, the orthographic projection of the substrate 2 may be circular, and the center of the substrate 2 is the geometric center thereof. In other embodiments, the orthographic projection of the substrate 2 may be a regular ellipse, triangle, circle, or the like, or may be other irregular shapes, which is not limited herein.

Specifically, the annular region 202 is provided with 3 layers, the annular region 202 is sequentially wrapped outside the central region 201, four layers of the substrate 2 in the lighting device 1 are provided from inside to outside, the central region 201 and the outer annular region are both provided with LED chips, the number of the LED chips provided by each layer from inside to outside is 1, 6, 12 and 18, and the total number of the LED chips is 37, wherein the light emitting area of at least one LED chip provided in the central region 201 of the substrate is smaller than the light emitting area of at least one LED chip in the annular region 202.

It should be noted that, in an embodiment, the annular area 202 is provided with 5 layers, the annular area 202 is sequentially wrapped outside the central area 201, six layers of the substrate 2 in the lighting device 1 are provided from inside to outside, the central area 201 and the outer annular area are both provided with LED chips, and the number of LED chips provided in each layer from inside to outside is 1, 6, 12, 18, 24, 28, and 89 LED chips are total.

The LED chips in each annular region 202 are arranged at intervals, and the LED chips in each annular region 202 are arranged in a polygonal point set, which means that according to a certain direction, one LED chip in the annular region 202 is used as a luminous point, and the centers of the luminous surfaces of the LED chips are sequentially connected in a clockwise or anticlockwise manner to form a polygonal structure. The polygons may be quadrilaterals, pentagons, hexagons, etc., and in particular, regular polygon structures may be formed, such as regular quadrilaterals, regular pentagons, regular hexagons, etc., and in this embodiment, the LED chips in each annular region 202 are arranged in a regular hexagonal lattice, and the LED chips are uniformly distributed in each annular region 202. In addition, adjacent LED chips are distributed in a regular triangle.

In the present embodiment, the center area 201 is provided with one LED chip. The first annular region 2021 is wrapped outside the central region 201, 6 LED chips are arranged in the first annular region 2021, and the 6 LED chips are located on the top points of the regular hexagon, namely, the included angle between two adjacent LED chips in the first annular region 2021 and the LED chips in the central region 201 is 60 degrees, and the distance between each LED chip and the LED chip in the central region is equal.

A second annular region 2022 is disposed outside the first annular region 2021, the second annular region 2022 is provided with 12 LED chips, 6 of the LED chips in the second annular region 2022 are respectively located on extension lines of the LED chips in the central region 201 and the LED chips in the first annular region 2021, and the remaining 6 LED chips are located in the middle of two adjacent LED chips. The included angle between the connection lines between any two adjacent LED chips in the second annular region 2022 and the LED chip in the central region 201 is 30 degrees.

A third annular region 2023 is arranged outside the second annular region 2022, 18 LED chips are arranged in the third annular region, 6 LED chips in the third annular region 2023 are respectively located on extension lines of the LED chips in the central region 201 and the LED chips in the first annular region 2021, and two LED chips are uniformly arranged between two adjacent LED chips, so that the 18 LED chips are uniformly distributed. The included angle between the connection lines of any two adjacent LED chips in the third annular region 2023 and the LED chip in the central region 201 is 20 degrees.

In this embodiment, as shown in fig. 2, the light emitting area of the LED chips located in the center area 201 is smaller than the light emitting area of the LED chips in the first annular area 2021, the light emitting areas of the 6 LED chips set in the first annular area 2021 are the same, the light emitting areas of the LED chips in the first annular area 2021 are smaller than the light emitting areas of the LED chips in the second annular area 2022, the light emitting areas of the 12 LED chips set in the second annular area 2022 are the same, the light emitting areas of the LED chips in the second annular area 2022 are smaller than the light emitting areas of the LED chips in the third annular area 2023, and the light emitting areas of the 18 LED chips set in the third annular area 2023 are the same. That is, in the present embodiment, the light emitting area of the LED chip gradually becomes larger along the center to the edge of the substrate, and this design can increase the illuminance of the lighting device. The specific principle is as follows:

referring to fig. 3, fig. 3 is an angular distribution diagram of the light emitted from the LED chips in the third, second, and first annular regions and the central region of the lighting device according to the present application, that is, when the light emitted from the LED chips in the third, second, and first annular regions 2021 and the central region 201 is within the angular range, the subsequent optical system may collect and project the light, and the main half angle of the light beams emitted from the 37 LED chips in the third, second, and first annular regions 2021 and the central region 201 is within 13 degrees, so that most of the light emitted from the LED chips is utilized. The light emitted by the LED chip is lambertian light, and the optical system of the whole lighting device 1 can only collect light incident on the optical surface of the LED chip, so that the utilization rate of the emitted light of the LED chip positioned in the central area is relatively high along with the array distribution of the LED chip on the surface of the substrate, and the utilization rate of the emitted light of the LED chip gradually becomes smaller along the direction of the edge of the central area, that is, a large part of the emitted light of the LED chip positioned in the non-central area cannot enter the subsequent optical system and is lost.

According to the LED light source, the size of the light emitting area of the LED chips in different areas is designed, the light emitting area of the LED chips in the central area or the LED chips close to the central area is smaller than the light emitting area of the LED chips in the annular area, so that after passing through the first collecting lens 4 and the second collecting lens 5, the light emitting angle is smaller, the light is focused at the diaphragm 7 after passing through the light emitting lens 6, and therefore smaller illumination spots are obtained, and the illuminance of the light at the diaphragm 105 is improved. And further the illuminance of the emergent light of the whole lighting device is improved.

With the LED chip design of the present application, the illuminance at the diaphragm 7 can be increased because, when the LED chip light emitting area is reduced, it is assumed that the LED chip near the central region of the substrate,the light emitting area of each LED chip is s1=1mm ² The light-emitting area of the LED chip in the annular area is s2=2mm ² The size of the light emitting area of the LED chip determines the area of the light spot at the diaphragm 7, and assuming that the magnification of the first collecting lens 4, the second collecting lens 5 and the light-emitting lens 6 to the light spot is n, the size of the light spot at the diaphragm 7 after the LED chip with the area s1 passes through the optical system is n×s1=n×mm ² The spot area of the LED chip with the area s2 at the diaphragm 7 after passing through the optical system is n×s2=n×2mm ² Assuming that the luminous flux emitted by a single LED chip is F, the illuminance of the LED chip with the area s1 at the diaphragm 7 through the optical system is: i1 =f/(n×s1) =f/(n); the illuminance of the LED chip with the area s2 at the diaphragm 7 through the optical system is: i2 From the above, the LED chip with area s1 at the diaphragm 7 contributes 2 times as much as the LED chip with area s 2. In practical application, under the same current driving, considering the influence of luminous efficiency, the luminous flux of the LED chip with small luminous area is about 60% -90% smaller than that of the LED chip with large luminous area, and the illuminance of the LED chip with small luminous area to the lighting device is improved by 1.2-1.8 times.

According to the analysis, when the projection lens of the same lighting device zooms to the minimum angle, the projection lens only collects light beams within 40 degrees, and the light emitting area of the LED chip in the central area of the substrate is reduced for the light source module of the LED chip, so that the emergent illumination of the lighting device is improved.

As shown in fig. 2, the light emitting area of the LED chip in the embodiment gradually increases from the center of the substrate to the annular edge, and the light emitting area of the LED chip in the outer ring area is larger than the light emitting area of the LED chip in the inner ring area.

In this embodiment, the LED chips in the central area 201 and the LED chips in the three annular areas 202 may be controlled by a control circuit on the substrate 2, so that the LED chips in different areas may work independently and do not interfere with each other. Each circle of layers can be integrally controlled according to actual conditions, and the on or off of the LED chips in different areas can be controlled.

In this embodiment, after the LED chip is powered on, the LED chip emits a light beam, and the emitted light beam is transmitted along a preset optical path, and then sequentially passes through the first collecting lens 4 and the second collecting lens 5. The first collecting lenses 4 are connected to the substrate 2, the first collecting lenses are wrapped on the LED chips, the number of the first collecting lenses 4 corresponds to the number of the LED chips, that is, 37 first collecting lenses 4 are arranged and correspond to the LED chips one by one. Since the luminescence angle is 360 degrees in theory, but the LED chip is fixed and packaged on the bracket, the luminescence angle is limited, only about 180 degrees, and different luminescence angles can be adjusted through the first collecting lens 4. The light beam passes through the first lens and then continuously passes through the second collecting lens 5, wherein the first collecting lens 4 is used for collecting the emergent light of the LED, the second collecting lens 5 is used for collimating the light collected by the first collecting lens 4, collecting and collimating the light beam into nearly parallel light with a certain divergence angle, and then emergent to the light emergent lens 6.

In this embodiment, the light-emitting lens 6 is a plano-convex lens, one end of the plano-convex lens is a plane, one end of the plano-convex lens is convex, and the light-emitting lens 6 is located on the light path emitted through the second collecting lens 5. The output lens 6 may include, but is not limited to, a collection lens, a lens or a lens group, etc. Any light collecting element that can limit the exit angle of the exiting light beam within a certain range may be used, and the embodiments of the present application are not limited herein. After entering the light outlet lens 6, the light beams of the LED chips are refracted by the light outlet lens 6 to gather the light to a certain extent.

In this embodiment, the beam will impinge on the diaphragm 7 after passing through the light exit mirror 6. A diaphragm refers to an entity that acts to limit a light beam in an optical system. It may be the edge of a lens, a frame or a specially arranged perforated screen. Which acts to limit the beam or limit the size of the field of view (imaging range). The diaphragm that restricts the most light beams in the optical system is called an aperture diaphragm, and the diaphragm 7 employed in this embodiment is an aperture diaphragm.

Alternatively, in the pattern lighting field, the diaphragm 7 may be a GOBO, where the GOBO is a thin plate mounted on a spotlight, a stage effect lamp, or the like, and various patterns or characters are projected under the irradiation of a special spotlight bulb, and the GOBO used in the industry may include a circular or rectangular thin plate.

It can be understood that the lighting device 1 and the diaphragm 7 can be reasonably selected and arranged, so that the outgoing beam homogenized by the lighting device 1 is incident into the diaphragm 7 as much as possible, which is beneficial to improving the beam utilization efficiency.

After passing through the diaphragm 7, the light beam is irradiated onto the projection lens 8. The projection lens 8 is a plano-convex lens, the projection lens 8 is located on the light path emitted by the diaphragm 7, and the light beam is transmitted through the projection lens 8 to form an image to be mapped on the projection plane.

As described above, in the light source module 3 of the lighting device 1 of the present application, the angles (half angles) of the LED chip outgoing light in the third, second, first annular regions 2021 and the central region 201 can be collected and processed by the subsequent optical system are within 13 degrees, and when the angles of the light that the optical system can collect are within 30 degrees, the LED chip outgoing light energy of the central region 201 and the annular region 202 adjacent to the central region of the light source module 3 is utilized at this time, and in the present embodiment, the optical system can receive the light of which the LED chip outgoing light angle is within 40 degrees.

Referring to fig. 4, fig. 4 is a schematic view illustrating a partial lighting group arrangement of a second embodiment of the lighting device of the present application. In a second embodiment of the present application.

The second embodiment is the same as the first embodiment in that the second embodiment is not further described, and only the distinguishing technical features of the second embodiment and the first embodiment are described, wherein the light emitting area of the LED chip in the central area of the second embodiment is smaller than the light emitting areas of the LED chips in the first, second and third annular areas, and the light emitting areas of the LED chips in the first, second and third annular areas are the same, that is, compared with the light emitting area of the LED chip in the first embodiment which gradually changes from the center to the edge, the light emitting area of the LED chip in the central area of the second embodiment is smaller, and the light emitting areas of the LED chips in the rest annular areas are the same. The design of the second embodiment enables the illumination device to simultaneously consider illumination and luminous flux, and only sets the LED chip with small luminous area in the central area, so that the illumination of the projection lens in a small angle is improved on the basis of not affecting the luminous flux of the whole illumination device.

Referring to fig. 5, fig. 5 is a schematic view illustrating a partial lighting group arrangement of a third embodiment of the lighting device of the present application. In a third embodiment of the present application.

The third embodiment is the same as the second embodiment, and is not further described, only the technical features of the third embodiment are different from those of the second embodiment, the light emitting areas of the LED chips in the central area and the first annular area of the third embodiment are smaller than the light emitting areas of the LED chips in the second and third annular areas, and the light emitting areas of the LED chips in the central area and the first annular area are the same, that is, the light emitting area of the LED chip in the second and third annular areas is smaller than the light emitting area of the LED chip in the second embodiment, and the light emitting area of the LED chip in the first annular area of the third embodiment is also smaller than the light emitting area of the LED chip in the second embodiment.

Referring to fig. 6, fig. 6 is a schematic view illustrating a partial lighting group arrangement of a fourth embodiment of the lighting device of the present application. In a fourth embodiment of the present application.

The fourth embodiment is the same as the third embodiment, and is not further described, and only the distinguishing technical features of the fourth embodiment and the third embodiment are described, the light emitting areas of the LED chips in the central area, the first annular area and the second annular area of the fourth embodiment are smaller than the light emitting area of the LED chips in the third annular area, and the light emitting areas of the LED chips in the central area, the first annular area and the second annular area are the same, that is, compared with the light emitting areas of the LED chips in the second embodiment, the light emitting areas of the LED chips in the first annular area and the second annular area of the fourth embodiment are smaller, so that the illumination intensity of the projection lens at a small angle can be further improved, but the upper limit of the luminous flux of the whole lighting device can be reduced, and the lighting device can be applied to a scene of small light spots and high brightness.

Referring to fig. 7, fig. 7 is a schematic view illustrating a partial lighting group arrangement of a fifth embodiment of the lighting device of the present application. In a fifth embodiment of the present application.

The fifth embodiment is the same as the fourth embodiment in that the description is not repeated, and only the distinguishing technical features of the fifth embodiment from the fourth embodiment are described, the light emitting area of the LED chip in the central region of the fifth embodiment is the smallest, and the light emitting areas of the LED chips in the first annular region and the second annular region are larger than the light emitting area of the LED chip in the central region, but at the same time smaller than the light emitting area of the LED chip in the third annular region, that is, the light emitting areas of the LED chips in the first annular region and the second annular region are intermediate between the light emitting areas of the LED chip in the central region and the light emitting area of the LED chip in the third annular region. Compared with the fourth embodiment, the design ensures that the upper limit of the overall luminous flux of the lighting device is compensated on the basis that the projection lens of the lighting device has higher illumination at a small angle.

It will be appreciated that in one embodiment, the light emitting area of the LED chips of the second annular region is intermediate the light emitting area of the LED chips of the central region and the first annular region and the light emitting area of the LED chips of the third annular region. At this time, the light emitting areas of the LED chips in the central area and the first annular area are the smallest, the light emitting areas of the LED chips in the second annular area are the next largest, and the light emitting areas of the LED chips in the third annular area are the largest. This solution also belongs to the extended design of the fifth embodiment and is also within the scope of protection of the fifth embodiment.

Referring to fig. 8, fig. 8 is a schematic view illustrating a partial lighting group arrangement of a sixth embodiment of the lighting device of the present application. In a sixth embodiment of the present application.

The sixth embodiment is the same as the first embodiment, and is not further described, and only the distinguishing technical features of the sixth embodiment and the first embodiment are described for the description, the central area of the sixth embodiment is provided with LED chips with a first light emitting area, the first annular area and the second annular area are provided with LED chips with a second light emitting area and LED chips with a third light emitting area, the LED chips with different light emitting areas in the first annular area and the second annular area are arranged at intervals, the third annular area is provided with LED chips with a fourth light emitting area, and the LED chips in the third annular area are the same, and it can be understood that in an embodiment, the third annular area may also contain LED chips with two different light emitting areas, wherein the LED chips with different light emitting areas are arranged at intervals. The sixth embodiment has the advantages that the projection lens of the lighting device is guaranteed to make up for the upper limit of the overall luminous flux of the lighting device on the basis of higher illumination of a small angle, and the emergent light efficiency of the lighting device is diversified due to the fact that different LED chips can be controlled independently, so that the application scene of the lighting device is further improved.

In this embodiment, the substrate 2 includes a plurality of vertical column regions 203, each vertical column region 203 is connected with each other, a plurality of LED chips are disposed in each vertical column region 203, the number of LED chips in the vertical column region 203 decreases from the middle to two sides in sequence, and the numbers of LED chips in the vertical column regions 203 at two sides correspond to each other. The LED chips in each column region 203 may be controlled to emit light by a control circuit on the substrate 2.

The specific embodiments of the present application are as follows: when the projection lens of the same lighting device zooms to the minimum angle, the projection lens only collects light beams within 40 degrees, and for the light source module of the LED chip, the light emitting area of the LED chip in the central area of the substrate is reduced, so that the emergent illumination of the lighting device is improved. Meanwhile, as the light emitting area of the LED chip near the central area is reduced, the emergent luminous flux of the whole lighting device is not influenced.

The foregoing description is only exemplary embodiments of the present application and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims

1. A lighting device, comprising:

2. A lighting device as recited in claim 1, wherein said light emitting elements are arranged in concentric circles in said annular region and one of said light emitting elements is disposed in said central region.

3. A lighting device as recited in claim 2, wherein said annular region comprises a first annular region, a second annular region and a third annular region which are disposed outside from inside.

4. A lighting device as recited in claim 3, wherein said light emitting elements in said central region have a light emitting area which is less than a light emitting area of said light emitting elements in said first annular region, said light emitting elements in said first annular region have a light emitting area which is less than a light emitting area of said light emitting elements in said second annular region, and said light emitting elements in said second annular region have a light emitting area which is less than a light emitting area of said light emitting elements in said third annular region.

5. A lighting device as recited in claim 3, wherein the light emitting elements in said central region have a smaller light emitting area than the light emitting elements in said first, second and third annular regions, and wherein the light emitting elements in said second and third annular regions have the same light emitting area.

6. A lighting device as recited in claim 3, wherein said light emitting elements in said central region and said first annular region have light emitting areas which are less than light emitting elements in said second annular region and said third annular region, and wherein said light emitting elements in said central region and said first annular region have light emitting areas which are the same, and wherein said light emitting elements in said second annular region and said third annular region have light emitting areas which are the same.

7. A lighting device as recited in claim 3, wherein light emitting elements in said central region, said first annular region and said second annular region have light emitting areas which are less than light emitting elements in said third annular region, and wherein light emitting elements in said central region, said first annular region and said second annular region have light emitting areas which are the same, and wherein light emitting elements in said third annular region have light emitting areas which are the same.

8. A lighting device as recited in claim 3, wherein said light emitting elements of said central region have a minimum light emitting area and said light emitting elements of said first and second annular regions have a greater light emitting area than said light emitting elements of said central region, said light emitting elements of said first and second annular regions being less than said light emitting elements of said third annular region.

9. A lighting device as recited in claim 3, wherein said central region is provided with light emitting elements of a first light emitting area, said first annular region and said second annular region are provided with light emitting elements of a second light emitting area and light emitting elements of a third light emitting area, said light emitting elements of different light emitting areas of said first annular region and said second annular region being arranged in spaced relation.

10. A lighting device as recited in any one of claims 1-9, further comprising a projection lens, said projection lens being positioned in an exit light path of said diaphragm.