A light-emitting uniform distribution calculation method and a lamp

Abstract

The present application belongs to the technical field of lamp design, and particularly relates to a light-emitting uniform distribution calculation method and a lamp, comprising a light-emitting cover and a plurality of light sources, characterized in that the method comprises the following steps: calculating an angle formed by the light source located at the center point and the vertex of the light-emitting cover, and designing a light beam angle required to be met by the required lens according to the angle; obtaining a maximum distance-height ratio corresponding to each light source through the light distribution formed by the lens, calculating the spacing between adjacent light sources, and designing the position arrangement of the light sources. The light-emitting uniform distribution calculation method can save the design time of the lamp, clearly define the design direction, and reduce the simulation time of the scheme; by changing the spatial intensity distribution of the light beam, the overall uniform light emission of the lamp is realized, and the status that the lamp is difficult to realize uniform light emission is changed; the more uniform light emission has less stimulation to the human eye, and is better and more beautiful for the decoration effect of the space.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lamp design, and particularly relates to a light-emitting uniform distribution calculation method and a lamp. BACKGROUND

[0002] The lamp uniformity requirement is generally for the front of the light-emitting cover. Due to the characteristics of the lamp beads, under the premise of no structural shielding, the side of the light-emitting cover close to the lamp beads is bright, and the luminance gradually decreases with the distance from the lamp beads. When the height of the light-emitting cover is relatively high, the front illuminance is low, the side close to the lamp beads has high illuminance, and the illuminance gradually decreases with the distance from the lamp beads. In order to realize the controllable luminance uniformity of the lamp, a calculation method for realizing the controllable luminance uniformity and the lamp application thereof are designed.

[0003] Therefore, it is of great significance to provide a light-emitting uniform distribution calculation method and a lamp. SUMMARY

[0004] In order to solve the problem of insufficient control of the luminance uniformity of the existing lamp, the present application provides a light-emitting uniform distribution calculation method and a lamp to solve the above technical defects.

[0005] In the first aspect, the present application provides a light-emitting uniform distribution calculation method, comprising a light-emitting cover and a plurality of light sources. The method comprises the following steps:

[0006] An angle formed by the light source located at the center point and the vertex of the light-emitting cover is calculated, and the light beam angle required by the required lens is designed according to the angle;

[0007] The maximum distance-height ratio corresponding to each light source is obtained through the light distribution formed by the lens, the distance between adjacent light sources is calculated, and the position arrangement of a plurality of light sources is designed.

[0008] Preferably, the shortest side length of the front or inner surface of the light-emitting cover is D, the other side length is S, and the side height is H. According to the formula The angle θ is calculated, and the light beam angle required by the required lens is designed as 2θ.

[0009] Further preferably, the maximum distance-height ratio is Z, the distance d between adjacent light sources is calculated according to the formula d / H≤Z, and the position arrangement of a plurality of light sources is designed according to the distance d.

[0010] Further preferably, the position arrangement of a plurality of light sources further comprises: ensuring that the distance between the light source located at the edge and the inner wall of the light-emitting cover is less than or equal to d / 2.

[0011] Further preferably, it further comprises verifying whether the position arrangement of a plurality of light sources meets the requirements, specifically comprising:

[0012] The maximum distance-height ratio S / 2H of the required lamp satisfying the uniform illuminance is calculated according to the size of the light-emitting cover, a light distribution curve is selected according to the numerical value of the maximum distance-height ratio S / 2H obtained by calculation, and the lens required to achieve S / 2H is designed, and the light-emitting effect is compared with the previous step.

[0013] Further preferably, the angle θ ranges from 10° to 85°.

[0014] In a second aspect, the embodiments of the present application also provide a lamp with uniform light-emitting distribution, which is designed according to the calculation method of the first aspect and comprises a light source assembly and an optical assembly, wherein the optical assembly is arranged on the surface of the light source assembly, and the light source assembly and the optical assembly are arranged inside the light-emitting cover.

[0015] Preferably, the light source assembly comprises a plurality of LED lamp beads, and the distance between adjacent light sources is d.

[0016] Further preferably, the distance between the light source at the edge and the inner wall of the light-emitting cover is less than or equal to d / 2.

[0017] Further preferably, the light source comprises white light and RGB LED lamp bead light sources.

[0018] Preferably, the optical assembly comprises various lens modules and lens combinations with different beam angles.

[0019] Further preferably, the optical assembly comprises a diffusion cover, a TIR lens, a plano-convex lens, a TV lens, and a street lamp lens.

[0020] Further preferably, the beam angle 2θ of the optical assembly ranges from 20° to 170°.

[0021] Preferably, the shape of the light-emitting cover comprises a cuboid, an ellipse, a cylinder, a cone, and a multi-faced cylinder.

[0022] Preferably, the lamp further comprises a driving assembly, a power supply device, and a heat dissipation device arranged inside the light-emitting cover, and the driving assembly, the power supply device, and the light source assembly are electrically connected to each other.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] (1) The calculation method of the lamp with uniform light-emitting distribution can save the design time of the lamp, clearly define the design direction, and reduce the simulation time of the scheme.

[0025] (2) The calculation method of the lamp with uniform light-emitting distribution can be applied to a variety of products, the light-emitting design is simpler, the scheme selection is more diverse, and the structure design is more simple and automatic.

[0026] (3) By changing the spatial intensity distribution of the light beam, the overall uniform light emission of the lamp is realized, which changes the status that the lamp is difficult to realize uniformity.

[0027] (4) The more uniform light emission is less irritating to the human eye, and the decoration effect on the space is better and more beautiful. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings are included to provide a further understanding of embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the application. Other embodiments and many of the intended advantages of the present application will be readily appreciated as the same becomes better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

[0029] Figure 1 is the light emission effect diagram of the prior art lamp of the present application;

[0030] Figure 2 is the flowchart of the calculation method of the uniform light emission distribution of the embodiment of the present application;

[0031] Figure 3 is the schematic diagram of the size and position of the light emission cover in the embodiment of the present application;

[0032] Figure 4 is the schematic diagram of the maximum distance to height ratio in the embodiment of the present application;

[0033] Figure 5 is the exploded structural schematic diagram of the lamp with uniform light emission distribution of the embodiment of the present application;

[0034] Figure 6 is the light ray schematic diagram and the simulated light emission effect diagram of the lamp with uniform light emission distribution of the embodiment of the present application;

[0035] Figure 7 is the actual verification effect diagram of the lamp in the embodiment 1 of the present application;

[0036] Figure 8 is the optical component schematic diagram and the light ray diagram of the lamp in the embodiment 2 of the present application;

[0037] Figure 9 is the structural diagram and the light ray schematic diagram of the lamp in the embodiment 2 of the present application.

[0038] Reference signs: 1, light emission cover; 2, light source assembly; 3, optical assembly. DETAILED DESCRIPTION

[0039] The application will be described in further detail below with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not intended to limit the application. In addition, it should be noted that only parts related to the application are shown in the drawings for ease of description.

[0040] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in further detail below with reference to the drawings and embodiments.

[0041] As Figure 1 shown, the light emission effect diagram of the existing lamp shows that the upper and lower surfaces are unevenly bright and dark. The uniformity requirement of the lamp is generally for the front surface of the light emission cover 1. Since the lamp beads themselves have the characteristics, under the premise of no structural shielding, the side surface of the light emission cover 1 is bright near the lamp beads, and the brightness gradually decreases away from the lamp beads; when the height of the light emission cover 1 is relatively high, the front surface illumination is low, the side surface close to the lamp bead position has high illumination, and the illumination gradually decreases away from the lamp beads.

[0042] In order to realize the controllable brightness uniformity of the lamp, the embodiment of the application designs a calculation method for realizing the controllable brightness uniformity and the lamp application thereof.

[0043] In a first aspect, the embodiment of the application discloses a calculation method for uniform light emission distribution, as Figure 2 shown, including a light emission cover 1 and a plurality of light sources, the method includes the following steps:

[0044] S1, calculating the angle formed by the light source located at the center point and the vertex of the light emission cover 1, and designing the light beam angle required to be met by the required lens according to the angle;

[0045] S2, obtaining the maximum distance-height ratio corresponding to each light source through the light distribution formed by the lens, calculating the distance between adjacent light sources, and designing the position arrangement of a plurality of light sources.

[0046] Specifically, as Figure 3 shown, let the shortest (or inner surface) side length of the front surface of the light emission cover 1 be D, the other side length be S, and the side surface height be H. Form an angle with the optical device of the light emission cover 1, and apply the formula:

[0047]

[0048] Calculate the angle θ, and design a secondary optical lens to meet the light beam angle 2θ.

[0049] At the same time, the light distribution formed by the lens can obtain the maximum distance-height ratio Z corresponding to each lamp bead or lamp bead module, according to the formula:

[0050] d / H≤Z

[0051] Calculate the distance d between the edges of the LED beads, design the LED bead arrangement, that is, the spacing d between adjacent light sources, and design the positional arrangement of several light sources based on the spacing d;

[0052] Preferably, the distance between the outermost LED and the edge of the light emitter 1 is less than or equal to d / 2, so as to achieve uniform light emission from the light emitter 1.

[0053] Furthermore, it also includes verifying whether the arrangement of the various light sources meets the required specifications, specifically including:

[0054] The maximum distance-to-height ratio required for the lamp to achieve uniform illuminance is calculated based on the size of the light-emitting cover 1. The maximum distance-to-height ratio S / 2H is then selected based on the calculated value of the maximum distance-to-height ratio S / 2H. The lens is designed to achieve S / 2H, and the light emission effect is compared with that of the previous steps.

[0055] Specifically, such as Figure 4 As shown, the maximum distance-to-height ratio S / 2H required for uniform illuminance of the luminaire is calculated based on the size of the light-emitting cover 1. The appropriate light distribution curve is selected according to the value, and then the secondary optical energy is designed to achieve the required S / 2H. This method can be cross-validated with the aforementioned method.

[0056] like Figure 4 Midpoint A represents the point where the horizontal illuminance is half of the maximum illuminance when there is only one LED. The maximum distance-to-height ratio is S / 2H.

[0057] Specifically, in this embodiment, the angle θ ranges from 10° to 85°, the beam angle 2θ ranges from 20° to 170°, and the maximum distance-to-height ratio Z varies according to the angle θ. Other embodiments can be designed to suit specific needs, and are not specifically limited here.

[0058] In some specific embodiments, such as when TV lenses are used in panel lights and ceiling lights, the beam angle is 150° to 170° and the maximum distance-to-height ratio is 3 to 6. In other cases, when plano-convex lenses are used, the beam angle is 60° to 90° and the maximum distance-to-height ratio is 0.7 to 1.

[0059] Secondly, embodiments of the present invention also disclose a lamp with uniform light distribution, based on the calculation method for uniform light distribution described in the first aspect, such as... Figure 5 As shown, it includes a light source component 2 and an optical component 3. The optical component 3 is disposed on the surface of the light source component 2, and the light source component 2 and the optical component 3 are disposed inside the light-emitting cover 1.

[0060] Specifically, this embodiment discloses the application of a lamp with uniform light output, such as... Figure 5 and 6As shown, optical components are attached above each LED lamp bead light source, and a milky white light exit cover 1 covers the light source assembly 2 and the optical assembly 3, including but not limited to driving, power supply device, heat dissipation device and assembly device, etc. which are not embodied in the figure. The driving assembly, power supply device and heat dissipation device are arranged inside the light exit cover 1, and the driving assembly, power supply device and light source assembly 2 are electrically connected to each other.

[0061] According to the structure of the light exit cover 1, a suitable lens is selected to change the spatial distribution of the original light intensity of the LED lamp bead light source, so as to realize overall or local uniform light emission.

[0062] Further, the light source assembly 2 includes a plurality of LED lamp bead light sources, and the distance between adjacent light sources is d. Among them, the distance between the light source located at the edge and the inner wall of the light exit cover 1 is less than or equal to d / 2.

[0063] In this embodiment, the light source includes white light and RGB LED lamp bead light source. In other embodiments, the type of light source can be adjusted according to the requirements, which is not specifically limited here.

[0064] The optical assembly 3 includes various lens modules and lens combinations with different beam angles. Among them, the optical assembly 3 includes a diffusion cover milky white cover, a TIR lens, a plano-convex lens, a TV lens and a street lamp lens. The beam angle 2θ of the optical assembly 3 ranges from 20° to 170°.

[0065] Further, the shape of the light exit cover 1 includes a rectangular prism, an ellipse, a cylinder, a cone and a multi-face cylinder. The maximum distance-height ratio Z of the light exit cover 1 changes according to the change of the angle θ. It should be noted that in other embodiments, the applicability design can be adjusted according to the requirements, which is not specifically limited here.

[0066] Embodiment 1:

[0067] Specifically, as Figure 1 SMD white light LED lamp beads are used, and a rectangular prism milky white frosted light exit cover 1 is used. When the light exit cover 1 is relatively high, simply selecting a Lambertian light-emitting LED (the maximum distance-height ratio S / 2H is about 1-1.2) cannot meet the uniform light emission.

[0068] As Figure 6 When the light distribution of the lamp bead itself cannot meet the uniformity requirement, the formula: is used to back-propagate θ, at this time the lens is used to control the light of the LED again, change its light distribution to meet the beam angle 2θ requirement. Then the light distribution formed by the lens is used to get the maximum distance-height ratio Z of the module (LED+lens), and the distance d between the edges of the lamp bead is calculated by the formula: d / H≤Z, and the lamp bead arrangement is designed to realize the uniform light emission of the light exit cover 1.

[0069] In one embodiment, D = 85mm, H = 175mm, S = 90mm in actual application, and the formula The calculation shows that θ is about 13°, and the beam angle 2θ is about 26°. The light distribution test of the lens in actual design shows that the light beam angle is 26.7°, and the light distribution maximum height ratio S / MH is 0.3, i.e. Z is 0.3.

[0070] At this time, the verification method is used to calculate the maximum height ratio S / 2H required by the lamp, which is about 0.26. According to the data, the light distribution curve selected according to the data is close to the 0.3 data obtained by the actual design test, and it can be seen that the two methods are feasible for mutual verification.

[0071] Then, the formula d / H≤Z is used to calculate that d is about 50mm; the light source arrangement and lens module are arranged according to the condition that the distance between the most edge lamp beads and the edge of the light shield 1 is ≤d / 2 (about 25mm), and the distance between the lamp beads is ≤50mm. The final actual effect is shown in Figure 7 , which is obviously improved compared with Figure 6 .

[0072] Embodiment 2:

[0073] In another embodiment, as shown in Figure 8 , SMD white light LED lamp beads are used, the light shield 1 is a cylindrical multi-face cylinder, all the lamp beads are provided with optical lenses, the illuminance of the light rays irradiated to the surface of the light shield 1 is close, and the result of uniform brightness of each light emitting surface is achieved.

[0074] Let the shortest (or inner surface) length of the front surface of the light shield 1 be D, the longest length of the other side be S, and the side height be H. The angle θ formed by a series of optical devices except the light shield 1 is the half angle of the beam angle. Therefore, when the beam distribution of the lamp beads itself cannot meet the requirements, the lens is used to meet the beam angle of the beam, and the formula is calculated as follows:

[0075]

[0076] Then, the maximum height ratio Z of each lamp bead (module) is obtained through the light distribution curve of the light rays passing through the lens, the lamp bead arrangement is designed, the distance d between the edges of the lamp beads is met, and the formula is as follows:

[0077] d / H≤Z

[0078] And the distance between the most edge lamp beads and the edge of the light shield 1 is less than or equal to d / 2, so that the light emitting of the light shield is uniform.

[0079] As shown in Figure 8 and Figure 9 , the reverse light distribution design of the optical device calculated by the foregoing method is not limited to the implementation of a single lens, and various lens modules, lens combinations with different beam angles, etc. can be combined.

[0080] The light emission uniform distribution calculation method can save the design time of the lamp, clear the design direction, reduce the scheme simulation time, can be applied to more products, the light emission design is simpler, the scheme selection is more various, and is more beneficial to the simplification and automation of the structure design.

[0081] By changing the spatial intensity distribution of the light beam, the overall uniform light emission of the lamp is realized, and the status that the lamp is difficult to realize uniform light emission is changed; the more uniform light emission is less stimulating to the human eye, and the decoration effect on the space is better and more beautiful.

[0082] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the application range involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by the combination of the above technical features or equivalent features without departing from the above inventive concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. A method for calculating uniform distribution of light output, comprising a light output mask and a plurality of light sources, characterized in that, The method comprises the following steps: The angle formed by the light source located at the center point and the vertex of the light cover is calculated, and the light beam angle required to be met by the designed lens is determined according to the angle; The maximum height ratio corresponding to each light source is obtained by the light distribution formed by the lens, the distance between adjacent light sources is calculated, and the position arrangement of a plurality of light sources is designed; Wherein, the shortest side length of the front or inner surface of the light-emitting mask is D, and the side height is H, according to the formula Calculate the angle Then the beam angle is .

2. The method of claim 1, wherein, The other side length of the light-exit cover front surface or inner surface is S, and the maximum height-to-distance ratio of the lamp satisfying the uniform illuminance is .

3. The method of claim 2, wherein, The maximum height-to-distance ratio is Z, according to the formula The distance d between adjacent light sources is calculated, and the positions of the light sources are arranged according to the distance d.

4. The method of claim 3, wherein, The arrangement of positions of the plurality of light sources further comprises: ensuring that the spacing between the light source located at the edge and the inner wall of the light-exit cover is less than or equal to .

5. The method of claim 4, wherein, Further comprising, verifying whether the position arrangement of a plurality of light sources meets the requirements, specifically comprising: The maximum height-distance ratio of the required luminaire to meet the uniform illuminance is calculated according to the size of the light shielding cover , and the numerical value of the maximum height-distance ratio obtained by calculation is used to select the appropriate light distribution curve, and the required lens is designed to achieve , and the light shielding effect is compared with the previous step.

6. The method of claim 5, wherein, The angle is in the range of 10° to 85°.

7. A luminaire with a uniform light distribution, according to the method of calculating a uniform light distribution as claimed in any one of claims 1 to 6, characterized in that, The light source assembly and the optical assembly are arranged on the surface of the light source assembly, and the light source assembly and the optical assembly are arranged in the light cover.

8. The lamp of claim 7, wherein, The light source assembly comprises a plurality of LED lamp bead light sources, and the distance between adjacent light sources is d.

9. The lamp of claim 8, wherein, The distance between the light source at the edge and the inner wall of the light exit cover is less than or equal to .

10. The lamp of claim 8, wherein, The light source comprises white light and RGB LED lamp bead light source.

11. The lamp of claim 7, wherein, The optical assembly comprises various lens modules and lens combinations with different light beam angles.

12. The lamp of claim 11, wherein, The optical assembly comprises a diffusion cover milky cover, a TIR lens, a plano-convex lens, a TV lens and a street lamp lens.

13. The lamp of claim 11, wherein, The beam angle of the optical assembly ranges from 20° to 170°.

14. The lamp of claim 7, wherein, The shape of the light cover comprises a rectangular parallelepiped, an ellipse, a cylinder, a cone and a multi-face cylinder.

15. The lamp of claim 7, wherein, Further comprising a driving assembly, a power supply device and a heat dissipation device arranged in the light cover, and the driving assembly, the power supply device and the light source assembly are electrically connected with each other.

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