A method and device for controlling plane illumination

Abstract

The present invention provides a method and device for controlling plane illumination, comprising the following steps: 1) arranging the light source assembly into two or more annular light source groups with the center of the lamp as the center of the circle; 2) controlling the vertical illumination of the annular light source group projecting and covering the plane area to be distributed alternately from the inside to the outside in the form of sine square and cosine square or cosine square and sine square; 3) controlling the projection coverage plane area of ​​the annular light source group to satisfy the overlap distance of the local plane coverage of the projection coverage of two adjacent light source groups; 4) controlling the output efficiency of each annular light source group to achieve a specific change in the target plane from the inside to the outside. The present invention can make the illumination of the target plane evenly distributed, effectively realize the quantitative layout of the illumination of the target plane, improve the control ability, and at the same time realize the smooth change of the illumination of the target plane, improving the user experience.

Description

Technical Field

[0001] The invention relates to a method for controlling indirect lighting, and in particular to a method for controlling the illumination of a target plane during indirect lighting. Background Art

[0002] Indirect lighting is a type of indoor lighting, characterized by the light emitted by the light source not being directly projected onto the target, but onto the ceiling, wall, floor, and then reflected into the indoor space. As a traditional lighting method, indirect lighting is mainly used as indoor ambient lighting and decorative elements. As an architectural indirect lighting system, the light source is partially blocked by the structure of the building or interior decoration, and the light is only projected onto the ceiling or stacked ceiling, with the help of other decorative elements to produce various light and shadow effects. At the same time, a certain degree of ambient lighting (Ambient Lighting) is provided through reflection from the ceiling and walls, and combined with various functional lighting, a complete indoor lighting with both decorative, comfortable and functional characteristics can be achieved; indirect lighting achieved by lighting, 90% or more of the light in the light source is projected onto the ceiling, and various light and shadow effects are produced by the shape of the lighting, and a certain degree of indoor ambient lighting (Ambient Lighting) is provided through reflection from the ceiling. As a type of lighting opposite to direct lighting, indirect lighting can effectively reduce the glare and shadows produced by direct lighting through at least one reflection, creating a soft, spatial indoor lighting environment.

[0003] Lu Jianing et al. published "Secondary Optical Design of LED Lens to Achieve Large-Scale Uniform Illumination" (Semiconductor Optoelectronics, Vol. 33, No. 3, June 2012, pp. 334-337), which disclosed a free-form surface lens that, combined with an LED Lambertian light source, can produce a light distribution curve with a maximum light intensity angle close to 120°, and produce a light spot with an illumination uniformity of more than 80% at a distance of 3 meters from a circular target plane with a diameter of 10 meters, for direct lighting. However, this light distribution is difficult to produce a light spot with a large coverage area for indirect lighting that is only a few dozen centimeters away from the target plane.

[0004] The US patent with publication number US2015 / 0285450A1 discloses an indirect lighting device, which uses a reflector, a lens, a prism and a light source, and sets a higher illumination uniformity (e.g., uniformity of 1) for the covered plane, and the inverse ratio of the cube of the cosine of the angle between the normal of the target plane and the light intensity reaching a certain point on the plane and the normal {cos-2(θ)} is used to strengthen the intensity of the far end by 25-400 times that of the near end. The goal of the patent is to achieve uniform illumination over a larger range (d2) at a lower distance (d1) from the target plane. In the extreme case of d2 / d1 of 10, the light intensity ratio between the far end and the near end needs to reach 25-400, which is calculated by the trigonometric function cos-2(θ) which is scientifically common sense and has the values ​​of θ of 78.5° and 87° respectively. In addition, the patent provides several embodiments of lens and prism light distribution for enhancing the far-end light intensity to 25-400 times. However, since the optical components require the light source to provide corresponding light intensities in different directions, especially at the extreme position of the far end close to the critical angle of 90° at up to 87°, 400 times the light intensity can be achieved. However, the patent lacks a technical solution for this key point, which is the key to achieving high illumination uniformity over a large range and the basis for realizing illumination layout and regulation of the coverage plane. Summary of the invention

[0005] Based on the above-mentioned problems existing in the prior art, the present invention proposes a lighting control method and a corresponding device with a larger primary reflection surface coverage and the ability to quantitatively layout and regulate the illumination of the target plane. The purpose is to solve the problems of illumination uniformity when covering a larger area, smooth changes in the illumination of the target plane, and effective and precise regulation of the quantitative layout.

[0006] One of the purposes of the present invention is to provide a method for controlling plane illumination, comprising the following steps:

[0007] 1) Arrange the light source components into two or more ring light source groups with the center of the lamp as the center of the circle;

[0008] 2) Control the vertical illumination of the plane area covered by the annular light source group to be distributed alternately from the inside to the outside in the form of sine square and cosine square or cosine square and sine square;

[0009] 3) Control the projection coverage plane area of ​​the annular light source group to satisfy the overlap distance of the projection coverage plane local area of ​​two adjacent light source groups. Wherein, L is the radius of the plane area covered by all the annular light source groups, n is the number of annular light source groups, and k is the overlap coefficient, which ranges from 45% to 50%.

[0010] Furthermore, the vertical illumination distribution of the sine square is The vertical illumination distribution of the cosine square is: Where E is the vertical illuminance, and d is the length from the projection point of the light source component to the center of the projection coverage plane area.

[0011] Furthermore, the length d from the projection point of the light source assembly to the center of the projection coverage plane area satisfies:

[0012] When i is 1,

[0013] When 2≤i<n-1,

[0014] When i is n-1 or n,

[0015] Among them, i is the i-th ring light source group in order from the inside to the outside.

[0016] Furthermore, the overlap coefficient is preferably 50%.

[0017] Furthermore, the method further comprises the step of installing the lamp, wherein when the lamp is installed, the height h of the light source assembly from the projection plane and the radius L of the projection coverage plane area of ​​the entire annular light source group meet

[0018] Furthermore, when the lamp is installed, the height h between the light source assembly and the projection plane is 15-70 cm.

[0019] Furthermore, the method also includes the step of individually controlling at least one of the annular light source groups.

[0020] Furthermore, the light source components of each annular light source group have the same rated parameters.

[0021] Furthermore, there are more than three annular light source groups, and the method further includes the step of controlling the change in the relative value of the maximum illumination of at least one annular light source group to accurately regulate the illumination change in a specific area of ​​the plane.

[0022] Furthermore, the number of the annular light source groups is more than 5.

[0023] Furthermore, the relative value of the maximum illumination of each annular light source group satisfies e i ≤e i+1 or e i ≥e i+1 , where e is the maximum relative illumination value, i is the i-th ring light source group in order from the inside to the outside, 1≤i≤n-1, and n is the total number of light source groups.

[0024] Furthermore, there are 5 groups of annular light source groups, and the relative values ​​of the maximum illumination corresponding to each annular light source group are 100:70-90:40-60:10-30:10-20. A second object of the present invention is to provide a lamp device capable of adjusting plane illumination, comprising: a light source assembly, the light source assembly is annular and arranged on the lamp with the center of the lamp as the center of the circle, the light source assembly comprises a light source element, a collimator, and a light redirector, the collimator is located on the light irradiation side of the light source element, and the light redirector is located on the side of the collimator away from the light source element.

[0025] Furthermore, each of the light source groups includes one light source element.

[0026] Furthermore, each group of the light source components has a plurality of light source elements and the spacing between the light source elements is sufficient for the components to form uniform annular light.

[0027] Furthermore, the collimator comprises a reflective cavity, and the reflective cavity is arranged to meet the requirement that the light source element converges to form a beam with an angle of 10-15° and emits vertically.

[0028] Furthermore, the reflectivity of the collimator reflection cavity is above 95%.

[0029] Furthermore, the light redirector is a free-form surface with a light transmittance of more than 95%.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention creatively proposes to use multiple light source components to realize the alternating sine and cosine distribution of vertical illumination in the projection coverage plane area, and form a 45%-50% overlap of the illumination distribution of the projection coverage plane area, effectively preventing abnormal light spots (i.e. abnormal bright spots or dark spots) from appearing in the entire projection area. In particular, when the overlap is controlled to 50%, the illumination of the target plane is evenly distributed under the condition that each light source group maintains the same phase ratio, thereby greatly improving the user experience.

[0032] 2. The present invention creatively proposes to use multiple light source components to achieve alternating sine and cosine distribution of vertical illumination in the projection coverage plane area, the projection coverage area of ​​each light source group, the overlapping area of ​​each light source group and other parameters, which can effectively realize the quantitative layout of the illumination of the target plane. When the output efficiency of each light source group presents a gradient as a whole, it can effectively ensure that the overall output light forms a smooth gradient change, and no abnormal photoelectric (i.e. abnormal bright spot or dark spot) will appear between the maximum illumination points (i.e. feature points), thereby improving the user experience.

[0033] 3. The present invention creatively proposes to utilize a sine-cosine arrangement of multiple light source components and control parameters such as the overlapping area and the projection area of ​​each light source group, so as to achieve independent changes in each light source group while keeping the maximum illumination points (i.e., feature points) corresponding to other light source groups unchanged, thereby effectively improving control accuracy and enhancing user experience.

[0034] 4. The present invention controls the overlapping part to 45%-50%, thereby changing the overlapping part ratio so that the position offset of the maximum illumination point (i.e., the feature point) corresponding to each light source group can be controlled within 10%, and the maximum deviation of the light intensity corresponding to the ideal feature point can be controlled within 12.5%. Then, by adjusting the output ratio of the independent light source group, the illumination distribution in the overlapping area does not show obvious difference, thereby realizing precise control of the illumination distribution in a specific area of ​​the target plane by adjusting the independent light source group. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the light source assembly of the present invention.

[0036] Figure 2 It is a schematic diagram of lighting projection of the lamp device according to embodiment 1 of the present invention.

[0037] Figure 3 This is a schematic diagram of the illumination distribution when the light source assembly of Example 1 of the present invention is started at full efficiency.

[0038] Figure 4 This is a schematic diagram of the illumination distribution when the light source assembly efficiency changes in the first manner when starting up in Example 1 of the present invention.

[0039] Figure 5 This is a schematic diagram of illumination distribution when the second mode of change in efficiency of the light source assembly in Example 1 of the present invention is started.

[0040] Figure 6 This is a schematic diagram of the illumination distribution when the light source assembly efficiency changes in the third manner when starting up in Example 1 of the present invention.

[0041] Figure 7 This is a schematic diagram of the illumination distribution when the light source assembly efficiency changes in the first manner when starting up in Example 3 of the present invention.

[0042] Figure 8 This is a schematic diagram of the illumination distribution when the second mode of change in efficiency of the light source assembly in embodiment 3 of the present invention is started.

[0043] Fig. 9 This is a schematic diagram of the illumination distribution when the efficiency of the light source assembly of Comparative Example 1 of the present invention changes in the first manner when it is started.

[0044] Fig.10 This is a schematic diagram of the illumination distribution when the efficiency of the light source assembly of Comparative Example 1 of the present invention changes in the second mode when it is started.

[0045] Among them, 1 is the light source element, 2 is the collimator, 3 is the light redirector; ① is the projection area of ​​the first light source group, ② is the projection area of ​​the second light source group, ③ is the projection area of ​​the third light source group, ④ is the projection area of ​​the fourth light source group, and ⑤ is the projection area of ​​the fifth light source group. DETAILED DESCRIPTION

[0046] Example 1

[0047] A lamp device comprises: 5 groups of light source components, the light source components are arranged in a ring on the lamp with the center of the lamp as the center of the circle, the light source components comprise light source elements, a collimator, and a light redirector, the collimator is located on the light irradiation side of the light source element, the light redirector is located on the side of the collimator away from the light source element, the spacing between the light source elements in each group of the light source components satisfies that the components irradiate to form uniform annular light, the collimator comprises a reflection cavity, the reflection cavity is arranged to meet the light source elements converging to form a light beam with an angle of 15° and vertical emission, the reflectivity of the collimator reflection cavity is 95%, and the light redirector is a free-form surface with a light transmittance of 95%.

[0048] The method for controlling plane illumination by using the above-mentioned lamp comprises the following steps: 1) arranging the light source components into 5 groups of annular light source groups with the center of the lamp as the center of the circle, and setting the hoisting height to 0.4m; 2) controlling the vertical illumination of the plane area covered by the annular light source group to be alternately distributed with positive and cosine squares; 3) controlling the plane area covered by the projection of the annular light source group to meet the overlap distance of the local plane coverage of the projection of two adjacent light source groups to be 50%, and the radius of the plane area covered by all the annular light source groups is 2m. At this time, the illumination distribution of each light source component is:

[0049] Area ①: E1 = cos 2 (d×π),

[0050] Area ②: E2 = sin 2 (d×π),d∈[0,1];

[0051] Area ③: E3 = cos 2 (d×π),

[0052] Area ④: E4 = sin 2 (d×π),d∈[1,2];

[0053] Area ⑤: E5 = cos 2 (d×π),

[0054] With the center of the lamp as the center of the circle O, the included angle θ between the line connecting each point in the plane area and the center of the circle O and the vertical line is projected. After normalization, the intensity distribution of each light source component is:

[0055]

[0056] or approximately

[0057]

[0058] or approximately

[0059]

[0060] or approximately

[0061]

[0062] or approximately

[0063]

[0064] or approximately

[0065] When each light source component outputs light in the first mode with full efficiency of 100%, the illumination of the target plane can be completely uniform. At this time, the relative illumination values ​​of the five points at a distance of 0, 0.5, 1, 1.5, and 2 meters from the center point O' of the projection coverage plane area are 10:10:10:10:10. Figure 3 shown.

[0066] When the output efficiency of the first ring light source group is kept unchanged and the output efficiency of the second to fifth ring light source groups is output in the second mode of 80%, 50%, 30%, and 10%, the relative illumination values ​​of the target plane corresponding to the above five points are 10:8:5:3:1, which is the maximum illumination point (i.e., the characteristic point). It can be seen that, compared with the first mode, the light source group with changed efficiency has no effect on the position of the maximum illumination corresponding to the light source group with unchanged efficiency, that is, precise control is achieved; at the same time, the entire projection area shows a trend of smooth change as a whole, and no abnormal bright spots or dark spots appear, such as Figure 4 shown.

[0067] When the output efficiency of the first ring light source group is kept unchanged and the output efficiency of the second to fifth ring light source groups is output in a third mode of 70%, 70%, 70%, and 50%, the relative illumination values ​​of the target plane corresponding to the above five points are 10:7:7:7:5, which is the maximum illumination point (i.e., the characteristic point). It can be seen that, compared with the first mode, the light source group with a changed efficiency has no effect on the position of the maximum illumination corresponding to the light source group with an unchanged efficiency, i.e., precise control is achieved; at the same time, the entire projection area shows a trend of smooth change as a whole, and no abnormal bright spots or dark spots appear, such as Figure 5 shown.

[0068] When the output efficiency of the 1st to 2nd and 5th annular light source groups is kept unchanged and the output efficiency of the 3rd to 4th annular light source groups is output according to the fourth mode of 70% and 50%, the relative illumination values ​​of the target plane corresponding to the above 5 points are 10:10:7:5:10, which are the maximum illumination points (i.e., characteristic points). It can be seen that, relative to the first mode, the light source group with changed efficiency has no influence on the position of the maximum illumination corresponding to the light source group with unchanged efficiency, thus achieving precise control.

[0069] When the output efficiency of the 4th to 5th ring light source groups is kept unchanged and the output efficiency of the 1st to 3rd ring light source groups is output in the fifth mode of 50%, 70%, and 70%, the relative illumination values ​​of the target plane corresponding to the above 5 points are 5:7:7:10:10, which are the maximum illumination points (i.e., feature points). It can be seen that, relative to the first mode, the light source group with changed efficiency has no effect on the position of the maximum illumination corresponding to the light source group with unchanged efficiency, i.e., precise control is achieved; at the same time, the entire projection area shows a trend of smooth change as a whole, and no abnormal bright spots or dark spots appear.

[0070] Example 2

[0071] A lamp device comprises: 7 groups of light source components, the light source components are arranged in a ring on the lamp with the center of the lamp as the center of the circle, the light source components comprise light source elements, a collimator, and a light redirector, the collimator is located on the light irradiation side of the light source element, the light redirector is located on the side of the collimator away from the light source element, the spacing between the light source elements in each group of the light source components satisfies that the components irradiate to form uniform annular light, the collimator comprises a reflection cavity, the reflection cavity is arranged to meet the light source elements converging to form a light beam with an angle of 15° and vertical emission, the reflectivity of the collimator reflection cavity is 95%, and the light redirector is a free-form surface with a light transmittance of 95%.

[0072] The method for controlling plane illumination by using the above-mentioned lamp comprises the following steps: 1) arranging the light source components into 7 groups of annular light source groups with the center of the lamp as the center of the circle, and setting the hoisting height to 0.4m; 2) controlling the vertical illumination of the plane area covered by the annular light source group to be alternately distributed with positive and cosine squares; 3) controlling the plane area covered by the projection of the annular light source group to meet the overlap distance of the local plane coverage of the projection of two adjacent light source groups to be 50%, and the radius of the plane area covered by all the annular light source groups is 2m. At this time, the illumination distribution of each light source component is:

[0073] Area ①: E1 = cos 2 (d×π),

[0074] Area ②: E2 = sin 2 (d×π),

[0075] Area ③: E3 = cos 2 (d×π),

[0076] Area ④: E4 = sin 2 (d×π),

[0077] Area ⑤: E5 = cos 2 (d×π),

[0078] Area ⑥: E4 = sin 2 (d×π),

[0079] Area ⑦: E5 = cos 2 (d×π),

[0080] With the center of the lamp as the center of the circle O, the included angle θ between the line connecting each point in the plane area and the center of the circle O and the vertical line is projected. After normalization, the intensity distribution of each light source component is:

[0081]

[0082] or approximately

[0083]

[0084] or approximately

[0085]

[0086] or approximately

[0087]

[0088] or approximately

[0089]

[0090] or approximately

[0091]

[0092] or approximately

[0093]

[0094] or approximately

[0095] When each light source assembly outputs light in the first mode with full efficiency of 100%, the illumination of the target plane can be completely uniform. At this time, at the distances from the center of the projection coverage plane area, 0, 1. The relative illumination values ​​of 7 points at 2 meters are 10:10:10:10:10:10:10:10.

[0096] When the output efficiency of the first ring light source group is kept unchanged and the output efficiency of the second to seventh ring light source groups is output in the second mode of 80%, 70%, 50%, 40%, 30% and 10%, the relative illumination values ​​of the target plane corresponding to the above 7 points are 10:8:7:5:4:3:1, which are the maximum illumination points (i.e., feature points). It can be seen that, relative to the first mode, the light source group with changed efficiency has no effect on the position of the maximum illumination corresponding to the light source group with unchanged efficiency, i.e., precise control is achieved; at the same time, the entire projection area shows a trend of smooth change as a whole, and no abnormal bright spots or dark spots appear.

[0097] When the output efficiency of the first ring light source group is kept unchanged and the output efficiency of the second to seventh ring light source groups is output in a third mode of 70%, 70%, 70%, 50%, 50% and 30%, the relative illumination values ​​of the target plane corresponding to the above 7 points are 10:7:7:7:7:5:5, which are the maximum illumination points (i.e., the feature points). It can be seen that, relative to the first mode, the light source group with changed efficiency has no effect on the position of the maximum illumination corresponding to the light source group with unchanged efficiency, i.e., precise control is achieved; at the same time, the entire projection area shows a trend of smooth change as a whole, and no abnormal bright spots or dark spots appear.

[0098] Example 3

[0099] A lamp device comprises: 5 groups of light source components, the light source components are arranged in a ring on the lamp with the center of the lamp as the center of the circle, the light source components comprise light source elements, a collimator, and a light redirector, the collimator is located on the light irradiation side of the light source element, the light redirector is located on the side of the collimator away from the light source element, the spacing between the light source elements in each group of the light source components satisfies that the components irradiate to form uniform annular light, the collimator comprises a reflection cavity, the reflection cavity is arranged to meet the light source elements converging to form a light beam with an angle of 15° and vertical emission, the reflectivity of the collimator reflection cavity is 95%, and the light redirector is a free-form surface with a light transmittance of 95%.

[0100] The method for controlling plane illumination by using the above-mentioned lamp comprises the following steps: 1) arranging the light source components into 5 groups of annular light source groups with the center of the lamp as the center of the circle, and setting the hoisting height to 0.4m; 2) controlling the vertical illumination of the plane area covered by the annular light source group to be alternately distributed with positive and cosine squares; 3) controlling the plane area covered by the projection of the annular light source group to meet the overlap distance of the local plane coverage of the projection of two adjacent light source groups to be 45%, and the radius of the plane area covered by all the annular light source groups is 2m. At this time, the illumination distribution of each light source component is:

[0101] Area ①: E1 = cos 2 (d×π),

[0102] Area ②: E2 = sin 2 (d×π),

[0103] Area ③: E3 = cos 2 (d×π),

[0104] Area ④: E4 = sin 2 (d×π),

[0105] Area ⑤: E5 = cos 2 (d×π),

[0106] With the center of the lamp as the center of the circle O, the included angle θ between the line connecting each point in the plane area and the center of the circle O and the vertical line is projected. After normalization, the intensity distribution of each light source component is:

[0107]

[0108]

[0109]

[0110]

[0111]

[0112] When each light source assembly outputs light in the first mode with full efficiency of 100%, it is measured that the position of the maximum illumination point (i.e., the characteristic point) with a relative illumination of 10:10:10:10 is 0, 0.55, 1.10, and 1.65 meters from the center point O' of the projection coverage plane area. It can be seen that relative to the setting of 50% overlap under the same conditions, the maximum offset of the characteristic point position is 10%, and the maximum deviation relative to the maximum illumination ratio corresponding to each light source group is 11%.

[0113] Keeping the output efficiency of the first ring light source group unchanged, when the output efficiency of the second to fifth ring light source groups outputs light sources in the second mode of 80%, 50%, 30%, and 10%, the relative illumination values ​​of the target plane corresponding to the above four feature points and the point 2 meters away from the center of the circle are 10:8:5:3:1.2, which are the maximum illumination points (i.e., feature points), and the relative illumination values ​​of the points 0, 0.5, 1, 1.5, and 2 meters away from the center of the circle (i.e., ideal feature points) are 10:7.8:4.7:2.8:1.2, and the maximum deviation from the maximum illumination ratio corresponding to each light source group is 6.67%. It can be seen that, compared with the setting of 50% overlap under the same conditions, the maximum position offset of the feature point is 10%, and the maximum deviation of the illumination of the ideal feature point is controlled within 12.5%. It can be seen that, compared with the first method, the light source group with changed efficiency has no effect on the position of the maximum illumination corresponding to the light source group with unchanged efficiency, and the maximum position offset of the changing overlap is only 10%, which means that precise control is achieved; at the same time, the entire projection area shows a smooth change trend as a whole, and no abnormal bright spots or dark spots appear.

[0114] Comparative Example 1

[0115] A lamp device comprises: 5 groups of light source components, the light source components are arranged in a ring on the lamp with the center of the lamp as the center of the circle, the light source components comprise light source elements, a collimator, and a light redirector, the collimator is located on the light irradiation side of the light source element, the light redirector is located on the side of the collimator away from the light source element, the spacing between the light source elements in each group of the light source components satisfies that the components irradiate to form uniform annular light, the collimator comprises a reflection cavity, the reflection cavity is arranged to meet the light source elements converging to form a light beam with an angle of 15° and vertical emission, the reflectivity of the collimator reflection cavity is 95%, and the light redirector is a free-form surface with a light transmittance of 95%.

[0116] The method for controlling plane illumination by using the above-mentioned lamp comprises the following steps: 1) arranging the light source components into 5 groups of annular light source groups with the center of the lamp as the center of the circle, and setting the hoisting height to 0.4m; 2) controlling the vertical illumination of the plane area projected and covered by the annular light source groups to be alternately distributed with positive and cosine squares; 3) controlling the plane area projected and covered by the annular light source groups to satisfy the overlap distance of the local plane area projected and covered by two adjacent light source groups to be 40%, and the radius of the plane area projected and covered by all annular light source groups to be 2m. At this time, the disposed illumination distribution of each light source component is:

[0117] Area ①: E1 = cos 2 (d*π),

[0118] Area ②: E2 = sin 2 (d*π),

[0119] Area ③: E3 = cos 2 (d*π),

[0120] Area ④: E4 = sin 2 (d*π),

[0121] Area ⑤: E5 = cos 2 (d*π),

[0122] With the center of the lamp as the center of the circle O, the included angle θ between the line connecting each point in the plane area and the center of the circle O and the vertical line is projected. After normalization, the intensity distribution of each light source component is:

[0123]

[0124] or approximately

[0125]

[0126] or approximately

[0127]

[0128] or approximately

[0129]

[0130] or approximately

[0131]

[0132] or approximately

[0133] When each light source component outputs independently, the vertical illuminance of the corresponding projection coverage plane area is still distributed in cosine square or sine square. According to the design, the projection coverage plane area of ​​the annular light source group is controlled to meet the overlap distance of the local projection coverage plane of the two adjacent light source groups at 40%. Compared with the 50% overlap feature point in Example 1 as the reference feature point, the feature point in this embodiment is offset to 0, 0.6, 1.2, and 1.8 meters from the center of the projection coverage plane area O', and the maximum offset is 20%. Although the illuminance at each feature point still reaches 10:10:10:10, the maximum deviation from the maximum illuminance ratio corresponding to each light source group has exceeded 20%. Fig. 9 The implementation effect is not ideal compared with that of Example 1.

[0134] When the efficiency of each light source assembly outputs light from the center O to the outside in the first mode of 100%, 80%, 50%, 30%, and 10%, the illumination of the target plane corresponding to the above four offset feature points and the far end point of the target plane are 10:8:5:3:2 respectively. Figure 7 Although the target illumination distribution control can still be reflected at the feature points, the maximum deviation relative to the maximum illumination ratio corresponding to each light source group is nearly 20%, as shown in Fig.10 The implementation effect is not ideal compared with that of Example 1.

[0135] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A control method for accurately regulating plane illumination, characterized in that: The steps include: 1) Arrange the light source components into two or more ring light source groups with the center of the lamp as the center of the circle; 2) Control the vertical illumination of the plane area covered by the annular light source group to be distributed alternately from the inside to the outside in the form of sine square and cosine square or cosine square and sine square; 3) Control the projection coverage plane area of ​​the annular light source group to satisfy the overlap distance of the projection coverage plane local area of ​​two adjacent light source groups. , where L is the radius of the plane area covered by all annular light source groups, n is the number of annular light source groups, and k is the overlap coefficient, which ranges from 45% to 50%; The vertical illuminance distribution of the sine square is: , the vertical illumination distribution of the cosine square is , where E is the vertical illuminance, and d is the distance from the projection point of the light source component to the center of the projection coverage plane area; The distance d between the projection point of the light source assembly and the center of the projection coverage plane area satisfies: When i is 1, When 2≤i<n-1, When i is n-1 or n, Wherein, i is the i-th ring light source group.

2. The control method according to claim 1, characterized in that: The number of the annular light source groups is more than 3, and the method further comprises the step of controlling the relative value change of the maximum illumination of at least one annular light source group to accurately regulate the illumination change of a specific area of ​​the plane; The relative value of the maximum illumination of each annular light source group satisfies e i ≤e i+1 or e i ≥e i+1 , where e is the maximum relative illumination value, i is the i-th ring light source group in order from the inside to the outside, 1≤i≤n-1, and n is the total number of light source groups.

3. The control method according to claim 1 or 2, characterized in that: The overlap factor is 50%.

4. The control method according to claim 1 or 2, characterized in that: The invention also includes the step of installing the lamp, wherein when the lamp is installed, the height h of the light source assembly from the projection plane and the radius L of the projection coverage plane area of ​​the entire annular light source group meet .

5. The control method according to claim 4, characterized in that: When the lamp is installed, the height h between the light source assembly and the projection plane is 15-70 cm.

6. The control method according to claim 2, characterized in that: There are 5 annular light source groups, and the relative values ​​of maximum illumination corresponding to the annular light source groups are 100:70-90:40-60:10-30:10-20.

7. A lighting device for executing the method according to any one of claims 1 to 6, characterized in that: The invention comprises more than two groups of light source components, which are ring-shaped and arranged on the lamp with the center of the lamp as the center of the circle. The light source components include a light source element, a collimator, and a light redirector. The collimator is located on the light irradiation side of the light source element, and the light redirector is located on the side of the collimator away from the light source element.

8. The device according to claim 7, characterized in that: There are multiple light source elements in each group of the light source components, and the spacing between them is sufficient for the components to form uniform annular light.

9. The device according to claim 7 or 8, characterized in that: The collimator comprises a reflection cavity, and the reflection cavity is arranged to meet the requirement that the light source element converges to form a beam with an angle of 10-15° and emits vertically.

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