阅读说明：本技术 一种快速定量调节照明装置光束角的方法及系统 (Method and system for quickly and quantitatively adjusting beam angle of lighting device ) 是由 王浩 李芹 刘军 郭阳 张飞 于 2021-02-09 设计创作，主要内容包括：本发明公开了一种快速定量调节照明装置光束角的方法,所述照明装置由至少两个光源组成,该方法包括：S1,根据实际场景,确定目标光束角,利用输入设备,将所述目标光束角发送至照明装置；S2,照明装置的接收器接收所述目标光束角并将所述目标光束角发送至照明装置的控制器；S3,照明装置的控制器根据所述目标光束角和存储在照明装置本地ROM或云端的参数表确定所述每个光源的目标功率；S4,所述驱动器驱动每个光源按相应的目标功率发光,辐射出的光线在被照明空间内发生混合,使光束角发生变化,根据光强叠加原理,获得目标光束角。本发明还公开了一种实现上述方法的系统。该方法使光束角调节精准、速度快且一致性和可控性高。(The invention discloses a method for quickly and quantitatively adjusting the beam angle of a lighting device, wherein the lighting device consists of at least two light sources, and the method comprises the following steps: s1, determining a target beam angle according to the actual scene, and sending the target beam angle to the lighting device by using the input equipment; s2, the receiver of the lighting fixture receiving the target beam angle and sending the target beam angle to the controller of the lighting fixture; s3, the controller of the lighting device determines the target power of each light source according to the target beam angle and a parameter table stored in a local ROM or a cloud end of the lighting device; and S4, the driver drives each light source to emit light according to the corresponding target power, the emitted light rays are mixed in the illuminated space, the beam angle is changed, and the target beam angle is obtained according to the light intensity superposition principle. The invention also discloses a system for realizing the method. The method has the advantages of accurate beam angle adjustment, high speed, high consistency and high controllability.)

1. A method for rapid quantitative adjustment of the beam angle of a lighting device, said lighting device consisting of a first light source and a second light source, the method comprising the steps of:

s1, determining a target beam angle according to the actual scene, and sending the target beam angle to the lighting device by using the input equipment;

s2, the receiver of the lighting fixture receiving the target beam angle and sending the target beam angle to the controller of the lighting fixture;

s3, the controller of the lighting device determines the target power of each light source according to the target beam angle and a parameter table stored in a local ROM or a cloud end of the lighting device;

s4, each light source is driven by the driver to emit light according to the corresponding target power, the radiated light rays are mixed in the illuminated space, the beam angle is changed, the target beam angle is obtained according to the light intensity superposition principle,

wherein the parameter table is a relation table for recording the beam angle of the lighting device and the corresponding power of the two light sources,

without changing the central light intensity of the lamp, the parameter table is obtained by:

at nominal power, the spatial light intensity distribution data of the first light source may be expressed as:

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle; m is₁Depending on half-angle beam angle

At nominal power, the spatial light intensity distribution data of the second light source may be expressed as:

wherein:

I₂₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle; m is₂Depending on half-angle beam angle

Assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂；

According to the algorithm described above, for different beam angles A_iCalculating the corresponding power W of the first light source and the second light source₁ ⁱAnd W₂ ⁱAnd obtaining the parameter table.

2. A method according to claim 1, characterized in that: for different beam angles A_iAnd central light intensity B_jCalculating the corresponding power W of the first light source and the second light source₁ ^ijAnd W₂ ^ijAnd obtaining the parameter table.

3. Method according to claim 1, characterized in that the parameter table is obtained on a discrete point basis without changing the central light intensity of the lamp by:

at nominal power, the spatial light intensity distribution data of the first light source is expressed as:

I₁(θ)＝I₁₀K₁(θ)，θ∈{-180°，-179°，-178°，……，0°，……，177°,178°,179°}，

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle;I₁(theta) and I₁₀Under fixed power, measuring by a space distribution photometer;

at nominal power, the spatial light intensity distribution data of the second light source is expressed as:

I₂(θ)＝I₂₀K₂(θ)，θ∈{-180°，-179°，-178°，......，0°，......，177°,178°,179°}，

wherein:

I₂₀is the luminous intensity in the direction perpendicular to the normal of the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle;I₂(theta) and I₂₀Under fixed power, measuring by a space distribution photometer;

assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂；

According to the algorithm described above, for different beam angles A_iCalculating a first light source and a second light sourceCorresponding power W of two light sources₁ ⁱAnd W₂ ⁱAnd obtaining the parameter table.

4. The method of claim 3, wherein: for different beam angles A_iAnd central light intensity B_jCalculating the corresponding power W of the first light source and the second light source₁ ^ijAndand obtaining the parameter table.

5. The method according to any one of claims 1-4, wherein: the lighting device also comprises a distance sensor, the controller automatically calculates the central light intensity B according to the distance information obtained by the distance sensor and the default illumination value E, and then refers to the parameter table according to the angle value of the target light beam to determine the target power of the first light source and the second light source.

6. A system for rapid quantitative adjustment of the beam angle of a lighting device comprised of a first light source and a second light source, each light source coupled to an optical element, the system comprising:

a power supply for powering the receiver, controller and driver in the system;

an input device for sending a target beam angle requirement to the lighting fixture;

a receiver for receiving a target beam angle command from an input end device;

a controller for receiving the target beam angle command from the receiver and determining the power of each light source by calculating or consulting a parameter table stored in a local ROM of the lighting device or in a cloud;

the driver is used for driving the corresponding light source to emit light according to the power of each light source to obtain a target beam angle;

the first light source and the second light source are respectively composed of a group of LED light-emitting elements, the two groups of LED light-emitting elements are respectively and uniformly distributed on an annular surface, the two annular surfaces are concentric, and the optical element is an annular lens coupled on the annular surface; or two groups of LED light-emitting elements are arranged on one annular surface, the LED light-emitting elements of the first light source and the second light source are alternately arranged, a plurality of optical elements of each light source are respectively coupled at the positions of the respective LED light-emitting elements,

wherein the parameter table is obtained without changing the central light intensity of the lamp by:

at nominal power, the spatial light intensity distribution data of the first light source may be expressed as:

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle; m is₁Depending on half-angle beam angle

At nominal power, the spatial light intensity distribution data of the second light source may be expressed as:

wherein:

I₂₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle; m is₂Depending on half-angle beam angle

Assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂；

According to the algorithm described above, for different beam angles A_iCalculating the corresponding power W of the first light source and the second light source₁ ⁱAnd W₂ ⁱTo obtain the parameter table, and to obtain the parameter table,

preferably, the spatial light intensity distribution data of the first and second light sources are obtained by a spatially distributed photometer for determining a parameter table and calculating the first and second control powers.

7. The system of claim 6, wherein: for different beam angles A_iAnd central light intensity B_jCalculating the corresponding power W of the first light source and the second light source₁ ^ijAndand obtaining the parameter table.

8. The system of claim 6, wherein the parameter table is obtained by, based on discrete points, without changing the central light intensity of the lamp:

at nominal power, the spatial light intensity distribution data of the first light source is expressed as:

I₁(θ)＝I₁₀K₁(θ)，θ∈{-180°，-179°，-178°，……，0°，……，177°,178°,179°}，

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle;I₁(theta) and I₁₀Under fixed power, measuring by a space distribution photometer;

at nominal power, the spatial light intensity distribution data of the second light source is expressed as:

I₂(θ)＝I₂₀K₂(θ)，θ∈{-180°，-179°，-178°，……，0°，……，177°,178°,179°}，

wherein:

I₂₀is the luminous intensity in the direction perpendicular to the normal of the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle;I₂(theta) and I₂₀Under fixed power, measuring by a space distribution photometer;

assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂；

According to the algorithm described above, for different beam angles A_iCalculating the corresponding power W of the first light source and the second light source₁ ⁱAnd W₂ ⁱTo obtain theAnd (4) a parameter table.

9. The system of claim 8, wherein: for different beam angles A_iAnd central light intensity B_jCalculating the corresponding power W of the first light source and the second light source₁ ^ijAnd W₂ ^ijAnd obtaining the parameter table.

10. The system according to any one of claims 6-9, wherein: the lighting device also comprises a distance sensor, the controller automatically calculates the central light intensity B according to the distance information obtained by the distance sensor and the default illumination value E, and then refers to the parameter table according to the angle value of the target light beam to determine the target power of the first light source and the second light source.

Technical Field

The invention belongs to the technical field of lighting, and particularly relates to a method and a system for quickly and quantitatively adjusting a beam angle of a lighting device.

Background

The beam angle (beam angle) is an important parameter of the lighting device. According to the standard, the beam angle is generally defined as the angle formed by the two sides at 1/2 where the light intensity reaches normal light intensity. The beam angle reaction is the size of a light spot and the intensity of illumination on an illuminated surface. For the same light source, the larger the beam angle is, the smaller the central light intensity is, the larger the spot of the irradiated surface is, and the weaker the central illumination of the irradiated surface is.

With the continuous improvement of the demand of the users for high-quality lighting environment, the light distribution demand for different beam angles is more and more. The small beam angle and the small spot are suitable for key illumination; large beam angle large spots are suitable for ambient lighting. The user may also wish to continuously adjust the magnitude of the beam angle to achieve the desired lighting effect from scene to scene.

There are three conventional methods for adjusting the beam angle: 1. the adjustment of the beam angle is realized by a rotary adjusting structure outside the lamp; 2. the tail adjusting structure of the lamp realizes the adjustment of the beam angle; 3. the adjusting structure is shifted by the lamp local part to realize the adjustment of the beam angle.

The structure can be realized manually or electrically. However, the mechanical adjustment is performed manually or electrically, and the principle is to adjust the beam angle and the spot size by changing the distance between the light source and the lens. The mechanical adjustment has the disadvantages of poor consistency, low controllability, inaccurate adjustment, easy abrasion, short service life of a mechanical structure, low adjustment speed, noise in the adjustment process and the like, and can seriously influence the experience of a user in the use process.

The traditional equipment for realizing the change of the beam angle by controlling the multi-path light source to mix light can only change the beam angle qualitatively, can not adjust the beam angle quickly, accurately and quantitatively, and can also seriously influence the experience of a user in the using process.

Disclosure of Invention

To solve the problems of the prior art, it is an object of the present invention to provide a method for fast and quantitative adjustment of the beam angle of a lighting device;

it is another object of the present invention to provide a system for rapid quantitative adjustment of the beam angle of a lighting device.

Therefore, the technical scheme of the invention is as follows:

a method for rapid quantitative adjustment of beam angle of a lighting device, said lighting device comprising at least two light sources, each light source being coupled to an optical element, said light sources each comprising a set of LED lighting elements, each set of LED lighting elements being uniformly distributed over an annular surface, and said annular surfaces being concentric, the method comprising the steps of:

s1, determining a target beam angle according to the actual scene, and sending the target beam angle to the lighting device by using the input equipment;

s2, the receiver of the lighting fixture receiving the target beam angle and sending the target beam angle to the controller of the lighting fixture;

s3, the controller of the lighting device determines the target power of each light source according to the target beam angle and a parameter table stored in a local ROM or a cloud end of the lighting device;

s4, the driver drives each light source to emit light according to the corresponding target power, the radiated light rays are mixed in the illuminated space, the beam angle is changed, the target beam angle is obtained according to the light intensity superposition principle,

the parameter table is a relation table for recording the beam angle of the lighting device and the corresponding power of the at least two light sources.

In one embodiment of the invention, the lighting device is composed of a first light source and a second light source, and the parameter table is obtained by the following method under rated power:

the spatial light intensity distribution data of the first light source is expressed as:

wherein:

I₁₀is the luminous intensity in the direction perpendicular to the normal of the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle; m is₁Depending on half-angle beam angle

The spatial light intensity distribution data of the second light source is expressed as:

wherein:

I₂₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle; m is₂Depending on half-angle beam angle

Assuming that the beam angle to be achieved is a and the overall lamp power is W, then:

W₁+W₂＝W，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂；

According to the algorithm described above, for different beam angles A_iCalculating the corresponding power W of the first light source and the second light source₁ ⁱAnd W₂ ⁱAnd obtaining the parameter table.

In another embodiment of the invention, the lighting device is composed of a first light source and a second light source, and the parameter table is obtained by the following method based on discrete points under rated power:

the spatial light intensity distribution data of the first light source is expressed as:

I₁(θ)＝I₁₀K₁(θ)，θ∈{-180°，-179°，-178°，……，0°，……，177°,178°,179°}，

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle;I₁(theta) and I₁₀Under fixed power, measuring by a space distribution photometer;

at nominal power, the spatial light intensity distribution data of the second light source is expressed as:

I₂(θ)＝I₂₀K₂(θ)，θ∈{-180°，-179°，-178°，……，0°，……，177°,178°,179°}，

wherein:

I₂₀is the luminous intensity in the direction perpendicular to the normal of the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle;I₂(theta) and I₂₀Under fixed power, measuring by a space distribution photometer;

assuming that the beam angle to be achieved is a and the overall lamp power is W, then:

W₁+W₂＝W，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂；

According to the algorithm described above, for different beam angles A_iCalculating the corresponding power W of the first light source and the second light source₁ ⁱAnd W₂ ⁱAnd obtaining the parameter table.

In a further embodiment of the invention, the lighting device is composed of a first light source and a second light source, the parameter table being obtained without changing the central light intensity of the lamp by:

at nominal power, the spatial light intensity distribution data of the first light source may be expressed as:

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle; m is₁Depending on half-angle beam angle

At nominal power, the spatial light intensity distribution data of the second light source may be expressed as:

wherein:

I₂₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle; m is₂Depending on half-angle beam angle

Assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂；

According to the algorithm described above, for different beam angles A_iCalculating the corresponding power W of the first light source and the second light source₁ ⁱAnd W₂ ⁱAnd obtaining the parameter table.

In addition, for different beam angles A_iAnd central light intensity B_jIn the case of (3), the respective powers W of the first and second light sources are calculated₁ ^ijAnd W₂ ^ijThe parameter table may be obtained.

In one embodiment of the invention, the lighting device is composed of a first light source and a second light source, and the parameter table is obtained by the following method based on discrete points without changing the central light intensity of the lamp:

at nominal power, the spatial light intensity distribution data of the first light source is expressed as:

I₁(θ)＝I₁₀K₁(θ)，θ∈{-180°，-179°，-178°，……，0°，……，177°,178°,179°}，

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle;I₁(theta) and I₁₀Under fixed power, measuring by a space distribution photometer;

at nominal power, the spatial light intensity distribution data of the second light source is expressed as:

I₂(θ)＝I₂₀K₂(θ)，θ∈{-180°，-179°，-178°，......，0°，......，177°,178°,179°}，

wherein:

I₂₀is the luminous intensity in the direction perpendicular to the normal of the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle;I₂(theta) and I₂₀Under fixed power, measuring by a space distribution photometer;

assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂；

According to the algorithm described above, for different beam angles A_iCalculating the corresponding power W of the first light source and the second light source₁ ⁱAnd W₂ ⁱAnd obtaining the parameter table.

In addition, for different beam angles A_iAnd central light intensity B_jIn the case of (3), the respective powers W of the first and second light sources are calculated₁ ^ijAnd W₂ ^ijThe parameter table may be obtained.

Preferably, the lighting device further comprises a distance sensor, the controller automatically calculates the central light intensity B according to the distance information obtained by the distance sensor and a default illuminance value E, and then refers to the parameter table according to the target beam angle value to determine the target power of the first light source and the second light source.

The present invention also provides a system for fast and quantitative adjustment of the beam angle of a lighting device, wherein the lighting device is composed of at least two light sources, each light source being coupled to an optical element, the system comprising:

a power supply for powering the receiver, controller and driver in the system;

an input device for sending a target beam angle requirement to the lighting fixture;

a receiver for receiving a target beam angle command from an input end device;

a controller for receiving a target beam angle command from the receiver and determining the power of each light source by calculating or referring to a parameter table;

the driver is used for driving the corresponding light source to emit light according to the power of each light source to obtain a target beam angle;

preferably, the lighting device is composed of a first light source and a second light source, the first light source and the second light source are respectively composed of a group of LED light emitting elements, two groups of LED light emitting elements are respectively and uniformly distributed on one annular surface, the two annular surfaces are concentric, and the optical element is an annular lens coupled on the annular surface; or two groups of LED light-emitting elements are arranged on one annular surface, the LED light-emitting elements of the first light source and the second light source are alternately arranged, and a plurality of optical elements of each light source are respectively coupled at the positions of the respective LED light-emitting elements.

Preferably, the spatial light intensity distribution data of the first and second light sources are obtained by a spatially distributed photometer for determining a parameter table and calculating the first and second control powers.

The invention has the following beneficial effects:

according to the method for quickly and quantitatively adjusting the beam angle of the lighting device, the beam angle is quantitatively calculated by using a light mixing algorithm and is electronically controlled, so that the beam angle is accurately adjusted, the speed is high, the consistency is high, and the controllability is high; compared with a product for mechanically adjusting the beam angle, the beam angle adjusting device does not generate noise in the adjusting process and has long service life.

The system for quickly and quantitatively adjusting the beam angle of the lighting device is suitable for upgrading and reconstructing many types of lighting devices on the market at present because any mechanical structure is not required to be added and only one path of light source module and a specific light mixing algorithm are required to be added.

Drawings

FIG. 1 is a graphical representation of a spatial light intensity distribution of a first light source in one embodiment of the present invention;

FIG. 2 is a graphical representation of a spatial light intensity distribution of a second light source in an embodiment of the present invention;

FIG. 3 is a schematic view of the relationship between the direction angle and the light source surface in the present invention;

FIG. 4 is a schematic diagram of intermediate beam angles resulting from mixing of beam angles of two different light sources of FIGS. 1 and 2;

FIG. 5 is a diagram of the system components for fast quantitative adjustment of the beam angle of a lighting device according to the present invention;

fig. 6 is a flow chart of the method for fast and quantitative adjustment of the beam angle of the lighting device according to the present invention.

Detailed Description

The method and system for fast and quantitative adjustment of the beam angle of the lighting device according to the present invention will be described in detail with reference to the accompanying drawings and embodiments.

Example one

Referring to fig. 6, the method for fast and quantitative adjustment of the beam angle of the lighting device of the present invention comprises the following steps:

s1, determining a target beam angle according to the actual scene, and sending the target beam angle to the lighting device by using the input equipment;

s2, the receiver of the lighting fixture receiving the target beam angle and sending the target beam angle to the controller of the lighting fixture;

s3, the controller of the lighting device determines the target power of each light source according to the target beam angle and a parameter table stored in a local ROM or a cloud end of the lighting device;

s4, the driver drives each light source to emit light according to the corresponding target power, the radiated light rays are mixed in the illuminated space, the beam angle is changed, the target beam angle is obtained according to the light intensity superposition principle,

the parameter table is a relation table for recording the beam angle of the lighting device and the corresponding power of the at least two light sources.

The calculation process can be carried out in the local MCU of the lighting device, and can also be carried out in the cloud.

The following examples two to five are methods for obtaining parameter tables under different conditions.

Example two

The lighting device of the present embodiment has a light source composed of two LED light emitting elements, i.e., a first light source and a second light source, and the beam angle of the first light source is smaller than that of the second light source.

Without changing the overall power W (i.e., the rated power) of the lamp, the target beam angle is related to the target power of the first and second light sources by the following parameter table, which is stored in the storage medium of the lighting device:

in the above table, W₁ ^kMaximum input power of the first light source W₂ ^kThe maximum input power of the second light source is not more than 1,2, … …, i, and the beam angle of the first light source is not more than A_k≦ second light source beam angle, where k ≦ 1,2, … …, i.

The above parameters are expressed inBeam angle A and control power W of the two light sources at a certain overall power of the lamp₁And W₂The relationship of (1), namely: by adjusting W₁And W₂The beam angle of the lighting device may be adjusted to a target value.

The parameter values in the parameter table are calculated by the following method:

in this embodiment, the spatial light intensity distribution data of the first light source and the second light source is taken as lambertian light source spatial light intensity distribution data as an example for explanation.

At nominal power, the spatial light intensity distribution data of the first light source may be expressed as:

wherein:

I₁₀is the luminous intensity in the direction perpendicular to the normal of the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a θ is a direction angle, i.e. an included angle between the observation direction and the normal direction of the light source surface, as shown in fig. 1; m is₁Depending on half-angle beam angle

At nominal power, the spatial light intensity distribution data of the second light source may be expressed as:

wherein:

I₂₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle; m is₂Depending on half-angle beam angle

Assuming that the beam angle to be achieved is a and the overall lamp power is W, then:

W₁+W₂＝W，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂。

In the case of a determination of the overall power of the lamp, for different beam angles A_iAll data of the parameter table can be provided by the method.

In the case of a determination of the overall power of the lamp, for different beam angles A_iThe above method may be implemented as an in-controller calculation of W₁And W₂The algorithm of (1).

For a more general scenario (when the spatial light intensity distribution data cannot be expressed analytically), the discrete point-based calculation method is as follows:

at nominal power, the spatial light intensity distribution data of the first light source may be expressed as:

I₁(θ)＝I₁₀K₁(θ)，θ∈{-180°，-179°，-178°，......，0°，......，177°,178°,179°}，

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle;I₁(theta) and I₁₀Under fixed power, measuring by a space distribution photometer;

at nominal power, the spatial light intensity distribution data of the second light source may be expressed as:

I₂(θ)＝I₂₀K₂(θ)，θ∈{-180°，-179°，-178°，......，0°，......，177°,178°,179°}，

wherein:

I₂₀is the luminous intensity in the direction perpendicular to the normal of the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle;I₂(theta) and I₂₀Under fixed power, measuring by a space distribution photometer;

assuming that the beam angle to be achieved is a and the overall lamp power is W, then:

W₁+W₂＝W，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂。

In the case of a determination of the overall power of the lamp, for different beam angles A_iAll data of the parameter table can be provided by the method.

In the case of a determination of the overall power of the lamp, for different beam angles A_iThe above method may be implemented as an in-controller calculation of W₁And W₂The algorithm of (1). The overall lamp power W is determined by the lamp brightness adjustment.

EXAMPLE III

This embodiment explains a method of obtaining a parameter table without changing the illuminance (central light intensity) of the lamp.

In the lighting device of the present embodiment, the light source is composed of 2 LED light emitting elements, i.e., a first light source and a second light source. For each lighting device, its parameter table may be expressed as:

in the above table, W₁ ^kMaximum input power of the first light source W₂ ^kThe maximum input power of the second light source is not more than 1,2, … …, i, and the beam angle of the first light source is not more than A_k≦ second light source beam angle, where k ≦ 1,2, … …, i.

The parameter table shows the beam angle A and the control power W of the two light sources under a certain central light intensity B₁And W₂The relationship of (1), namely: by adjusting W₁And W₂The beam angle of the lighting device may be adjusted to a target value.

The parameter values in the parameter table are calculated by the following method:

in this embodiment, the spatial light intensity distribution data of the first light source and the second light source is taken as lambertian light source spatial light intensity distribution data as an example for explanation.

At nominal power, the spatial light intensity distribution data of the first light source may be expressed as:

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle; m is₁Depending on half-angle beam angle

At nominal power, the spatial light intensity distribution data of the second light source may be expressed as:

wherein:

I₂₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle; m is₂Depending on half-angle beam angle

Assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂。

For different beam angles A, with a constant central light intensity B_iAll data of the parameter table can be provided by the method.

For different beam angles A, with a constant central light intensity B_iThe above method may be implemented as an in-controller calculation of W₁And W₂The algorithm of (1).

For a more general scenario (when the spatial light intensity distribution data cannot be expressed analytically), the discrete point-based calculation method is as follows:

at nominal power, the spatial light intensity distribution data of the first light source may be expressed as:

I₁(θ)＝I₁₀K₁(θ)，θ∈{-180°，-179°，-178°，......，0°，......，177°,178°,179°},

wherein:

I₁₀is the normal of the light source surfaceThe luminous intensity of the direction is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle;

at nominal power, the spatial light intensity distribution data of the second light source may be expressed as:

I₂(θ)＝I₂₀K₂(θ), θ e { -180 °, -179 °, -178 °, … …, 0 °, … …, 177 °,178 °,179 ° }, wherein:

I₂₀is the luminous intensity in the direction perpendicular to the normal of the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is the direction angle.

Assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂。

For different beam angles A, with a constant central light intensity B_iAll data of the parameter table can be provided by the method.

For different beam angles A, with a constant central light intensity B_iThe above method may be implemented as an in-controller calculation of W₁And W₂The algorithm of (1).

The central light intensity B may be determined by a manually inputted illuminance E value, for example, if an illuminance E of 500 lux is realized with a reference receiving surface directly below the lamp d by 1 meter, then: e d ═ B²＝500*1²500 candela.

Preferably, the system automatically calculates the central light intensity B based on the distance information obtained by the distance sensor and a default illuminance value, and determines the target power of the first and second light sources based on a stored parameter table. For example, according to the related illumination standard, the illumination suitable for read-write operation is 500 lux, the cardiac light intensity B is calculated according to the distance information d obtained by the distance sensor, and then the parameter table is consulted according to the target light beam angle value to determine the target power of the first light source and the second light source.

Example four

This embodiment illustrates a method for obtaining a parameter table under different lamp illuminance E/central light intensity B.

In the lighting device of the present embodiment, the light source is composed of 2 LED light emitting elements, i.e., a first light source and a second light source. For each lighting device, its parameter table may be expressed as:

the parameter table represents the beam angle and the input central light intensity B of the lighting device and the control power W of the first light source₁And the control power W of the second light source₂The relationship between them. That is, when we input a beam angle and a central light intensity to the lighting device, we will obtain a control power W of the first light source₁And the control power W of the second light source₂。

In the above table, a is the beam angle; b is the input central light intensity; w is the input power of the light source, and comprises:

wherein k is 1,2, … …, i, l is 1,2, … …, j;

wherein k is 1,2, … …, i, l is 1,2, … …, j;

the first light source beam angle is less than or equal to A_k≦ second light source beam angle, where k ≦ 1,2, … …, i.

Preferably, the system automatically calculates the central light intensity B based on the distance information obtained by the distance sensor and the default illuminance value E, and determines the target power of the first and second light sources based on a stored parameter table. For example, according to the related illumination standard, the illumination suitable for the read-write operation is E-500 lux, the central light intensity B is calculated according to the distance information d obtained by the distance sensor, and the target power of the first light source and the second light source is determined by referring to the parameter table according to the target light beam angle value.

In this embodiment, the spatial light intensity distribution data of the first light source and the second light source is taken as lambertian light source spatial light intensity distribution data as an example for explanation.

At nominal power, the spatial light intensity distribution data of the first light source may be expressed as:

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle; m is₁Depending on half-angle beam angle

At nominal power, the spatial light intensity distribution data of the second light source may be expressed as:

wherein:

I₂₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle; m is₂Depending on half-angle beam angle

Assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂。

For different beam angles A_iAnd central light intensity B_jAll data of the parameter table can be provided by the method.

For different beam angles A_iAnd central light intensity B_jThe above method may be implemented as an in-controller calculation of W₁And W₂The algorithm of (1).

For a more general scenario (when the spatial light intensity distribution data cannot be expressed analytically), the discrete point-based calculation method is as follows:

at nominal power, the spatial light intensity distribution data of the first light source may be expressed as:

I₁(θ)＝I₁₀K₁(θ)，θ∈{-180°，-179°，-178°，……，0°，……，177°,178°,179°}，

wherein:

I₁₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the first light source, I₁₀＝g(W₁) (ii) a Theta is a direction angle;I₁(theta) and I₁₀Is measured by a spatially distributed photometer at a fixed power.

At nominal power, the spatial light intensity distribution data of the second light source may be expressed as:

I₂(θ)＝I₂₀K₂(θ)，θ∈{-180°，-179°，-178°，......，0°，......，177°,178°,179°}，

wherein:

I₂₀is the luminous intensity in the direction normal to the light source surface, is related to the input power of the second light source, I₂₀＝g(W₂) (ii) a Theta is a direction angle;I₂(theta) and I₂₀Is measured by a spatially distributed photometer at a fixed power.

Assuming that the beam angle to be achieved is a and the central light intensity is B:

I₁₀+I₂₀＝g(W₁)+g(W₂)＝B，

thereby calculating the input power W of the first light source₁And input power W of the second light source₂。

For different beam angles A_iAnd central light intensity B_jAll data of the parameter table can be provided by the method.

For different beam angles A_iAnd central light intensity B_jThe above method may be implemented as an in-controller calculation of W₁And W₂The algorithm of (1).

FIG. 2 is a graph illustrating a spatial light intensity distribution of a first light source having a relatively small beam angle, in accordance with an embodiment of the present invention; fig. 3 shows a spatial light intensity distribution curve of a second light source with a larger beam angle in an embodiment of the invention. Fig. 4 shows the light mixing effect of the spatial light intensity distribution curve of the first light source and the spatial light intensity distribution curve of the second light source. As can be seen from the figure, any beam angle between the first light source beam angle and the second light source beam angle can be obtained by a combination of different input powers of the first light source and the second light source.

EXAMPLE five

For a plurality of light sources, according to the method of two light sources in the foregoing three embodiments, the light beam angle value can be changed under the condition that the overall power of the lamp and the illuminance (central light intensity) of the lamp are not changed, or under the condition that the overall power of the lamp is not changed and the illuminance (central light intensity) of the lamp is changed, and the input powers of the plurality of light sources are determined through the equation relations in the foregoing three embodiments, so as to obtain the parameter table.

EXAMPLE six

In order to realize the method, the invention also provides a system for quickly and quantitatively adjusting the beam angle of the lighting device. As shown in fig. 5, the system includes a power supply, an input device, a receiver, a controller, and a driver. Preferably, the lighting device comprises two light sources.

The power supply is used for supplying power to a receiver, a controller and a driver in the system;

the input device is used for sending the target light beam angle value to the receiver of the lighting device and also sending the target illumination value to the receiver of the lighting device;

the receiver is used for receiving the target light beam angle value and sending the target light beam angle value to the controller;

the controller is used for receiving the target light beam angle value and determining the power of each light source through calculation or consulting a parameter table;

the driver is used for driving the corresponding light source to emit light according to the power of each light source so as to obtain a target beam angle;

the receiver, the controller and the driver are all arranged in the lighting device;

the input equipment is a mobile phone APP, Pad or a remote controller;

the receiver is a Bluetooth device or a wifi device;

the controller is a CPU of the lighting device;

the driver is a driver of an intelligent lamp.

Preferably, the lighting device is composed of a first light source and a second light source, the first light source and the second light source are respectively composed of a group of LED light emitting elements, two groups of LED light emitting elements are respectively and uniformly distributed on an annular surface, the two annular surfaces are concentric, and the optical element is an annular lens coupled on the annular surface.

Or two groups of LED light-emitting elements are arranged on one annular surface, the LED light-emitting elements of the first light source and the second light source are alternately arranged, and a plurality of optical elements of each light source are respectively coupled at the positions of the respective LED light-emitting elements.

Preferably, the spatial light intensity distribution data of the first and second light sources are obtained by a spatially distributed photometer for determining a parameter table and calculating the first and second control powers.

The process of adjusting the beam angle of the lighting device by the system is described below by taking two light sources as an example.

Referring to fig. 5, the target beam angle is transmitted to the lighting apparatus by using the input device, the receiver of the lighting apparatus receives the target beam angle command and transmits the target beam angle command to the controller of the lighting apparatus, the controller of the lighting apparatus determines the power W1 of the first light source and the power W2 of the second light source by a calculation method or a reference parameter table as in the second, third or fourth embodiment, the first light source and the second light source emit light according to the power provided by the driver, and the emitted light rays are mixed in the space to be illuminated, so that the beam angle is changed, and the target beam angle is obtained according to the light intensity superposition principle.

The input device and the receiver of the lighting device may communicate via wired technology or wireless technology.