Reflector structure, design method and illumination lamp

Abstract

The invention provides a reflector structure, a design method and an illumination lamp, and the method comprises the steps: designing a plurality of target irradiation line segments of a target irradiation region, generating a plurality of corresponding reflection sections, designing a plurality of reflection points on each reflection section, and carrying out the curve fitting of each reflection point on each reflection section, and performing curve fitting on the starting points of the generated reflection curves to generate a guide curve, so as to smoothly connect the reflection curves along the curve path of the guide curve to generate a reflection surface of the reflector structure, thereby covering the reflector structure on the illumination lamp. The emergent light of the LED light source is reflected to a target irradiation area through the reflecting surface of the designed reflector structure; according to the application, by designing each reflection point, the density distribution of the light reflected to the target irradiation area is adjusted, light energy attenuated by light propagation and light scattering is compensated, and uniform distribution of illumination of the target irradiation area is ensured.

Description

Technical Field

[0001] This application relates to the technical field of LED lighting applications, and particularly to a reflector structure, a design method, and a lighting fixture. Background Art

[0002] With the development of LED lighting application technology, currently most LED table lamps generally adopt the direct-downward lighting method or the side-lighting method. Among them, the direct-downward lighting method arranges the LED lamp beads directly downward, and the light irradiates the desktop through a diffusion plate or a lens; the side-lighting method places the LED lamp beads on the side of the light guide plate, and the light forms a surface light source through the refraction of the light guide plate dots. These two lighting forms can achieve the characteristics of thin and light lamps, but due to the lack of basic light pattern control, the illuminance of the light irradiating the desktop is very uneven.

[0003] There are also some LED table lamps that adopt the reflective lighting method. The light emitted by the LED light source does not directly irradiate the target area, but is first projected onto a special reflective cavity or reflective surface and diffused after diffuse reflection. However, only the overall deflection of the lighting angle and the lack of optical design will also cause the situation that the illuminance under the lamp is too high and the illuminance in the corner area is too low when the light irradiates the desktop.

[0004] Therefore, the existing optical design methods of LED table lamps have the technical defect of uneven desktop illuminance distribution, which is not conducive to providing a good reading and writing visual environment. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of this application is to provide a reflector structure, a design method, and a lighting fixture, which are used to solve the technical problem of uneven desktop illuminance distribution existing in the existing optical design methods of LED table lamps.

[0006] To achieve the above object and other related objects, the first aspect of this application provides a design method for a reflector structure, which is applied to the design of a reflector structure covering an LED light source in a lighting fixture. The reflector structure design method includes: arbitrarily selecting a plurality of boundary points at the boundary of the target illumination area of the lighting fixture, and connecting each boundary point to the central projection point of the LED light source to obtain a plurality of target illumination line segments, and drawing a plurality of reflection cross-sections perpendicular to the target illumination area with each target illumination line segment as a side; respectively designing a plurality of reflection points on each reflection cross-section, so that the emitted light of the LED light source is reflected by each reflection point to the target illumination line segment corresponding to each reflection cross-section, and the illuminance of each target illumination line segment is evenly distributed; respectively performing a curve fitting operation on each reflection point on each reflection cross-section to generate a reflection curve of each reflection cross-section, and performing a curve fitting operation on the starting point of each reflection curve to generate a guiding curve; along the curve path of the guiding curve, smoothly connecting each reflection curve to generate a reflecting surface of the reflector structure.

[0007] In some embodiments of the first aspect of the present application, the method of designing multiple reflection points on a reflection section includes: presetting a height above the LED light source, and equally spacing and arranging a preset number of reflection points at a preset horizontal distance; designing the target irradiation point of the first reflection point close to the LED light source to be located at one end of the corresponding target irradiation line segment far from the LED light source, and designing the target irradiation point of the last reflection point far from the LED light source to be located at one end of the corresponding target irradiation line segment close to the LED light source; constructing a light energy distribution decreasing model, and respectively calculating the positions of the target irradiation points on the corresponding target irradiation line segments where the emitted light rays of the LED light source are reflected by the remaining reflection points according to this; constructing a light irradiation angle increasing model, and respectively calculating the light irradiation angles of each reflection point; calculating and adjusting the target positions of each reflection point according to the target irradiation point positions and light irradiation angles of each reflection point.

[0008] In some embodiments of the first aspect of the present application, the light energy distribution decreasing model is a quadratic function decreasing model, which satisfies the formula: where L is the length of the target irradiation line segment corresponding to the current reflection section; n is the arrangement serial number of each reflection point in the current reflection section, and each reflection point is sorted starting from the first reflection point close to the LED light source; Δ is the decreasing coefficient, which is used to reflect the speed of light energy decrease; is the length of the target irradiation point of the nth reflection point P n from the central projection point of the LED light source.

[0009] In some embodiments of the first aspect of the present application, the light irradiation angle increasing model satisfies the formula: where n is the arrangement serial number of each reflection point in the current reflection section, and each reflection point is sorted starting from the first reflection point close to the LED light source; is the light irradiation angle of the nth reflection point P n , is the light irradiation angle of the (n + 1)th reflection point P n+1 ; a, b, c, and d are four polynomial coefficients respectively.

[0010] In some embodiments of the first aspect of the present application, the method of calculating the target position of the reflection point includes: taking the central projection point of the LED light source as the origin, and constructing a coordinate system with the corresponding target irradiation line segment as the x-axis, and calculating the target position of the reflection point, and the calculation formula is: x n =(n - 1)×l; where n is the arrangement serial number of each reflection point in the current reflection section, and each reflection point is sorted starting from the first reflection point close to the LED light source; l is the preset horizontal distance between each reflection point; is the length of the target illumination point of the nth reflection point P n from the central projection point of the LED light source; is the light irradiation angle of the nth reflection point P n ; x n and y n are respectively the target positions of the nth reflection point P n .

[0011] In some embodiments of the first aspect of the present application, the manner of performing the curve fitting operation includes: using a high-order polynomial fitting method to perform curve fitting on each reflection point on each reflection section respectively to generate a reflection curve for each reflection section; using a high-order polynomial fitting method to perform curve fitting on the starting points of each reflection curve to generate a guiding curve.

[0012] In some embodiments of the first aspect of the present application, the target illumination area is one of a rectangle, a sector, a circle, and other specific shapes.

[0013] To achieve the above object and other related objects, a second aspect of the present application provides a mirror structure, which is covered on the LED light source of the lighting fixture and is designed by using the mirror structure design method described in any one of the above embodiments. The mirror structure includes: a reflection surface, and the reflection surface includes: a guiding curve and a plurality of reflection curves, and each reflection curve is smoothly connected along the curve path of the guiding curve; each reflection curve is located in a reflection section, and each reflection section is respectively perpendicular to the target illumination area of the lighting fixture, and each reflection section further includes a target illumination line segment; each target illumination line segment includes the central projection point of the LED light source and a boundary point of the target illumination area; each reflection curve includes a plurality of reflection points, so that the outgoing light of the LED light source is reflected by each reflection point to the target illumination line segment corresponding to each reflection section, and the illuminance of each target illumination line segment is evenly distributed.

[0014] To achieve the above object and other related objects, a third aspect of the present application provides a lighting fixture, which includes: an LED light source and a mirror structure covered on the LED light source as described in any one of the above embodiments; wherein, the mirror structure includes: a reflection surface; the reflection surface includes: a guiding curve and a plurality of reflection curves, and each reflection curve is smoothly connected along the curve path of the guiding curve; each reflection curve is located in a reflection section, and each reflection section is respectively perpendicular to the target illumination area of the lighting fixture, and each reflection section further includes a target illumination line segment; each target illumination line segment includes the central projection point of the LED light source and a boundary point of the target illumination area; each reflection curve includes a plurality of reflection points, so that the outgoing light of the LED light source is reflected by each reflection point to the target illumination line segment corresponding to each reflection section, and the illuminance of each target illumination line segment is evenly distributed.

[0015] In some embodiments of the third aspect of the present application, the lighting fixture further includes: a diffuser plate disposed on the back of the LED light source. The emitted light of the LED light source is reflected by each reflection point of the mirror structure to the diffuser plate and diffused through the diffuser plate to the target illumination area.

[0016] As described above, the present application provides a mirror structure, a design method, and a lighting fixture. By designing multiple target illumination line segments in the target illumination area, multiple corresponding reflection cross-sections are generated, and multiple reflection points are designed on each reflection cross-section. Curve fitting is performed on each reflection point on each reflection cross-section, and curve fitting is performed on the starting points of the generated reflection curves to generate a guiding curve. Along the curved path of the guiding curve, the reflection curves are smoothly connected to generate the reflecting surface of the mirror structure. Then, the mirror structure is covered on the lighting fixture, so that the emitted light of the LED light source is reflected to the target illumination area through the reflecting surface of the designed mirror structure. Therefore, the present application has the following beneficial effects: By designing each reflection point, the density distribution of the light reflected to the target illumination area is adjusted, and the light energy attenuated due to light propagation and light scattering is compensated to ensure uniform illumination distribution in the target illumination area. Description of the Drawings

[0017] Figure 1 It shows a schematic structural diagram of a lighting fixture in an embodiment of the present application.

[0018] Figure 2 It shows a schematic structural diagram of a mirror structure in an embodiment of the present application

[0019] Figure 3 It shows a schematic flow diagram of a mirror structure design method in an embodiment of the present application.

[0020] Figure 4 It shows a schematic diagram of an LED light source, a reflection curve, and a target illumination line segment in an embodiment of the present application.

[0021] Figure 5 It shows a schematic diagram of a design method for each reflection point in an embodiment of the present application.

[0022] Figure 6 It shows a schematic diagram of calculating the target position of a reflection point in an embodiment of the present application. Detailed Description of the Embodiments

[0023] The following specific examples illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0024] To solve the problems in the above background art, the present application provides a mirror structure, a design method and a lighting fixture, aiming to reflect the emitted light of an LED light source to a target illumination area through optical design of the mirror structure, so that the illuminance in the target illumination area is evenly distributed, thereby solving the technical problem of uneven desktop illuminance distribution existing in the existing optical design method of LED table lamps, and further ensuring that the lighting fixture adopting the mirror structure can provide a good reading and writing visual environment for users.

[0025] In order to make the invention purpose, technical solution and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be further described in detail through the following embodiments in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] As Figure 1 shown, a schematic structural diagram of a lighting fixture in an embodiment of the present application is shown. The lighting fixture in this embodiment includes: an LED light source 1 and a mirror structure 2. Among them, the mirror structure 2 covers the LED light source 1. The emitted light of the LED light source 1 is reflected by the mirror structure 2 to the target illumination area of the lighting fixture, so that the illuminance in the target illumination area is evenly distributed.

[0027] It should be understood that the shape and size of the target illumination area of the lighting fixture can be determined according to user requirements and the illuminance requirements of the lighting fixture. In one embodiment, the target illumination area can be one of a rectangle, a sector, a circle and other specific shapes, and the present application does not specifically limit this.

[0028] As Figure 1 shown, the mirror structure 2 includes a reflection surface 21, and the light-emitting surface 11 of the LED light source faces the reflection surface 21, so that the emitted light of the LED light source is reflected by the reflection surface 21 to the target illumination area.

[0029] The reflection surface 21 of the mirror structure 2 includes: a guiding curve and a plurality of reflection curves, and each reflection curve is smoothly connected along the curve path of the guiding curve.

[0030] AsFigure 2 As shown, a mirror structure 2 in an embodiment of the present application is presented. In this embodiment, as Figure 2 shown, the reflecting surface 21 includes: a reflecting curve M1, a reflecting curve M2, a reflecting curve M3, a reflecting curve M4, a reflecting curve M5, and a guiding curve M6. It is generated by the lofting surface method. Along the curved path of the guiding curve M6, the reflecting curves M1 to M5 are smoothly connected to generate the reflecting surface 21.

[0031] It should be noted that Figure 2 in the illustrated embodiment, including five reflecting curves is only an example and does not actually represent that the mirror structure 2 of the present application includes five reflecting curves. Moreover, the present application does not specifically limit the number of the reflecting curves. However, it should be understood that when designing the mirror structure 2, the more the number of the reflecting curves, the smoother the generated reflecting surface 21, and the more uniform the illuminance distribution of the outgoing light reflected to the target illumination area.

[0032] Each reflecting curve is located in a reflection section. Each reflection section is respectively perpendicular to the target illumination area of the lighting fixture, and each reflection section further includes a target illumination line segment; each target illumination line segment includes the central projection point of the LED light source and a boundary point of the target illumination area; each reflecting curve includes a plurality of reflection points, and each reflection point is designed based on the law of decreasing light energy, so that the outgoing light of the LED light source is reflected by each reflection point to the target illumination line segment corresponding to each reflection section, and the illuminance of each target illumination line segment is evenly distributed.

[0033] In one embodiment, as Figure 1 shown, the lighting fixture further includes: a diffuser plate 3. The diffuser plate 3 is arranged on the back of the LED light source 1. The outgoing light of the LED light source 1 is reflected by each reflection point of the mirror structure 2 to the diffuser plate 3 and is diffused to the target illumination area through the diffuser plate 3.

[0034] It should be understood that the diffuser plate 3 is mainly used for evenly diffusing light. After the outgoing light of the LED light source 1 is reflected by the mirror structure 2, the light energy will gradually decrease with the distance. Due to the diffusion effect of the diffuser plate 3, it will further affect the law of decreasing light energy. The haze parameter of the diffuser plate refers to the percentage of the scattered light flux deviating from the incident direction by more than 2.5° in the transmitted light of the diffuser plate to the total transmitted light flux, which reflects the ability of the diffuser plate to scatter the outgoing light. Therefore, the haze parameter of the diffuser plate 3 can affect the law of decreasing light energy of the outgoing light of the LED light source 1, thereby affecting the optical design of each reflection point and the optical design of the mirror structure 2.

[0035] As Figure 3As shown, it is a schematic flowchart of a method for designing a mirror structure in an embodiment of the present application.

[0036] Step S1: Arbitrarily select multiple boundary points at the boundary of the target illumination area of the lighting fixture, and connect each boundary point to the central projection point of the LED light source to obtain multiple target illumination line segments. Draw multiple reflection cross-sections perpendicular to the target illumination area with each target illumination line segment as a side.

[0037] To more clearly illustrate the specific implementation of this step, the following example and Figure 4 are used for detailed description. It should be understood that this example is only used to explain this step.

[0038] In this example, the target illumination area is rectangle ABCD, and the LED light source of the lighting fixture is set at a specified position above one side of AB of the target illumination area ABCD. At this time, the central projection point of the LED light source is Figure 4 the point O shown, and the central projection point O is the central position of side AB.

[0039] It should be understood that the LED light source may include multiple lighting units, such as multiple LED lamp beads. The central projection point of the LED light source refers to the projection point of the geometric center of the light-emitting surface of the LED light source on the target illumination area.

[0040] As Figure 4 shown, select multiple boundary points of the target illumination area ABCD, including: boundary point A, boundary point B, boundary point C, boundary point D, and boundary point E. Connect each boundary point to the central projection point O of the LED light source to obtain target illumination line segments OA, OB, OC, OD, and OE. Draw multiple reflection cross-sections perpendicular to the target illumination area with each target illumination line segment as a side, for designing a reflection curve corresponding to the target illumination line segment on each reflection cross-section, such as reflection curve M5, reflection curve M1, reflection curve M2, reflection curve M4, and reflection curve M2.

[0041] It should be noted that, for the convenience of designing each reflection curve, the LED light source is abstracted as virtual point light sources on multiple reflection sections. For example, the virtual point light source S1 is located on the first reflection section, and the first reflection section includes the reflection curve M1 and the target illumination line segment OB; the virtual point light source S2 is located on the second reflection section, and the second reflection section includes the reflection curve M2 and the target illumination line segment OC; the virtual point light source S3 is located on the third reflection section, and the third reflection section includes the reflection curve M3 and the target illumination line segment OE; the virtual point light source S4 is located on the fourth reflection section, and the fourth reflection section includes the reflection curve M4 and the target illumination line segment OD; the virtual point light source S5 is located on the fifth reflection section, and the fifth reflection section includes the reflection curve M5 and the target illumination line segment OA.

[0042] Step S2: Design multiple reflection points on each reflection section respectively, so that the emitted light rays of the LED light source are reflected by each reflection point to the target illumination line segments corresponding to each reflection section, and make the illuminance of each target illumination line segment evenly distributed.

[0043] It should be understood that after the emitted light rays of the LED light source 1 are emitted, the light energy will gradually weaken due to factors such as light propagation and scattering. Among the target illumination line segments, the boundary points are farther from the LED light source than the central projection points. For example: Figure 4 As shown, the boundary point C of the target illumination line segment OC is farther from the central projection point O. At this time, the light energy at the boundary point decays more and the illuminance is too low. Therefore, as the distance from the central projection point increases in the target illumination line segment, the light energy decay gradually increases.

[0044] To make the illuminance evenly distributed when the emitted light rays irradiate the target illumination line segment, the reflector structure 2 can be used. Specifically, through each reflection point of each reflection section, the density of the emitted light rays irradiating the target illumination line segment is adjusted. As the distance from the central projection point increases, the density of the emitted light rays increases, thereby compensating the light energy at the boundary position and meeting the requirement of evenly distributed illuminance for each target illumination line segment and the target illumination area.

[0045] In one embodiment, the method of designing multiple reflection points on one reflection section includes the following steps.

[0046] ① Preset a height above the LED light source, and set a preset number of reflection points at equal intervals according to a preset horizontal distance.

[0047] ② Design the target illumination point of the first reflection point close to the LED light source to be at the end of the corresponding target illumination line segment far from the LED light source, and design the target illumination point of the last reflection point far from the LED light source to be at the end of the corresponding target illumination line segment close to the LED light source.

[0048] It should be noted that at least three reflection points need to be designed on each reflection section. Among them, the outgoing light of the LED light source is reflected by the first reflection point to the end of the corresponding target illumination line segment away from the LED light source, that is, to the boundary point position of the corresponding target illumination line segment; the outgoing light of the LED light source is reflected by the last reflection point to the end of the corresponding target illumination line segment close to the LED light source, that is, to the central projection point position. The more reflection points are designed, the more uniform the density distribution of the outgoing light reflected to the corresponding target illumination area is, and the more uniform the illuminance distribution is. However, this application does not limit the number of reflection points on each reflection section, and the user can determine it according to the illuminance requirements of the lighting fixture.

[0049] ③Construct a light energy distribution decreasing model, and calculate the target illumination point positions of the outgoing light of the LED light source reflected by the remaining reflection points to the corresponding target illumination line segments accordingly.

[0050] The light energy distribution decreasing model is mainly constructed based on the law that light energy decreases with the propagation distance, the diffusion effect of the diffusion plate 3 in the lighting fixture, the size of the target illumination area, and the illuminance requirements of the lighting fixture, and is used to describe the functional relationship between the target illumination point positions of each reflection point and the reflection points.

[0051] In a preferred embodiment, the light energy distribution decreasing model is a quadratic function decreasing model, which satisfies the formula:

[0052]

[0053] where L is the length of the target illumination line segment corresponding to the current reflection section; n is the arrangement serial number of each reflection point in the current reflection section, and each reflection point is sorted starting from the first reflection point close to the LED light source; Δ is the decreasing coefficient, which is used to reflect the speed of light energy decrease; is the length of the target illumination point of the nth reflection point P n from the central projection point of the LED light source.

[0054] Specifically, the decreasing coefficient Δ is related to the haze parameter of the diffusion plate 3, the size of the target illumination area, and the illuminance requirements of the lighting fixture. By adjusting the size of the decreasing coefficient Δ, the diffusion effect of the diffusion plate 3 can be offset to avoid its influence on the optical design of the reflector structure 2. In a preferred embodiment, the haze parameter of the diffusion plate 3 is greater than or equal to 80%, and the decreasing coefficient Δ is 0.0625.

[0055] According to formula (1), calculate the target illumination point positions of each reflection point in the current reflection section in turn.

[0056] ④Construct a light irradiation angle increasing model, and calculate the light irradiation angles of each reflection point accordingly.

[0057] To make the illuminance of the outgoing light uniformly distributed when irradiating the target irradiation line segment, the density and irradiation angle of each outgoing light are designed, and the light irradiation angle increasing model is constructed.

[0058] In one embodiment, the light irradiation angle increasing model satisfies the formula:

[0059]

[0060] where n is the arrangement serial number of each reflection point of the current reflection section, and each reflection point is sorted starting from the first reflection point close to the LED light source; is the light irradiation angle of the nth reflection point P n , that is, the included angle between the connection line of the nth reflection point P n and its target irradiation point and the corresponding target irradiation line segment; is the light irradiation angle of the (n + 1)th reflection point P n+1 , that is, the included angle between the connection line of the (n + 1)th reflection point P n+1 and its target irradiation point and the corresponding target irradiation line segment; a, b, c, and d are four polynomial coefficients respectively.

[0061] Preferably, the polynomial coefficients are a = 1.25, b = -5.5357, c = 12.214, and d = -8. Therefore, the light irradiation angle increasing model satisfies the formula:

[0062]

[0063] It should be noted that after the preset position of the first reflection point P1 close to the LED light source is set, it does not need to be adjusted and is directly used as its target position. And the target irradiation point of the first reflection point P1 is the central projection point of the LED light source. Therefore, the included angle between its connection line and the corresponding target irradiation line segment is fixed and does not need to be calculated, and can be used as a basis to continue calculating the remaining light irradiation angles

[0064] ⑤ Calculate and adjust the target positions of each reflection point according to the target irradiation point positions and light irradiation angles of each reflection point.

[0065] In one embodiment, with the central projection point of the LED light source as the origin and the corresponding target irradiation line segment as the x-axis, a coordinate system is constructed, and according to the law of light reflection, the following formula is used to calculate the target position of the reflection point:

[0066] x n = (n - 1) × l; Formula (4)

[0067]

[0068] Wherein, n is the arrangement serial number of each reflection point of the current reflection section, and each reflection point is sorted starting from the first reflection point close to the LED light source; l is the preset horizontal distance between each reflection point; is the length from the target irradiation point of the nth reflection point P n to the central projection point of the LED light source; is the light irradiation angle of the nth reflection point P n ; x n and y n are respectively the target positions of the nth reflection point P n .

[0069] To more clearly illustrate the specific implementation manner of each reflection point for designing the current reflection section, through the following examples and Figure 5 and Figure 6 are described in detail. It should be understood that this example is only used to explain this step.

[0070] This example takes the design of each reflection point of the second reflection section as an example. As Figure 5 shown, it is assumed that 5 reflection points are designed on the second reflection section for performing a curve fitting operation on the 5 reflection points to generate a corresponding reflection section curve M2.

[0071] First, the 5 reflection points P1, P2, P3, P4, and P5 are set at a preset height above the LED light source 1. In a preferred embodiment, they are set 1 cm above the LED light source 1 and arranged at equal intervals according to the preset horizontal distance.

[0072] It should be noted that the preset height and the preset horizontal distance can be set according to the internal space structure of the lighting fixture and its illuminance requirements, and the present application does not specifically limit them.

[0073] Then, according to formula (1), the distances from the target irradiation points N1, N2, N3, N4, and N5 corresponding to the reflection points P1, P2, P3, P4, and P5 to the central projection point O are calculated in sequence. Among them, the outgoing light of the LED light source is reflected by the first reflection point P1 to the end of the corresponding target irradiation line segment OC far from the LED light source, that is, Figure 5 the C point shown; the outgoing light of the LED light source is reflected by the last reflection point P5 to the end of the corresponding target irradiation line segment close to the LED light source, that is, Figure 5 the central projection point O shown.

[0074] As Figure 5 shown, in the target irradiation line segment OC, the density of the outgoing light near the C point is greater, compensating for the greater light energy attenuation near the C point.

[0075] It should be noted that the position of the reflection point P1 is fixedly set at a preset height of the LED light source and at a preset horizontal distance. Its target irradiation point N1 is the C point of the target irradiation line segment OC. Therefore, the light irradiation angle value can be directly calculated based on the positions of the two points. Further, the angles between the connecting lines of the reflection points P1, P2, P3, P4, and P5 and their corresponding target irradiation points N1, N2, N3, N4, and N5 and the target irradiation line segment OC are calculated successively according to formula (3) and

[0076] According to formula (4) and formula (5), as Figure 6 shown, the target position coordinates of the reflection points P2, P3, P4, and P5 are calculated successively, so as to adjust each reflection point for generating the reflection curve M2.

[0077] It should be noted that when calculating the target position coordinates of each reflection point, a coordinate system can be constructed with the central projection point O as the origin and the target irradiation line segment OC as the x-axis, as Figure 6 shown.

[0078] Step S3: Perform curve fitting operations on the reflection points on each reflection section respectively to generate the reflection curves of each reflection section, and perform curve fitting operations on the starting points of each reflection curve to generate a guiding curve.

[0079] In an embodiment, the ways of performing curve fitting operations on the reflection points on each reflection section respectively include: using the high-order polynomial fitting method to perform curve fitting on the reflection points on each reflection section respectively to generate the reflection curves of each reflection section. The ways of performing curve fitting operations on the starting points of each reflection curve include: using the high-order polynomial fitting method to perform curve fitting on the starting points of each reflection curve to generate a guiding curve.

[0080] For example, as Figure 5 shown, the reflection points P1, P2, P3, P4, and P5 whose target positions are finally determined are subjected to curve fitting using the high-order polynomial fitting method to generate the reflection curve M2 of the second reflection section. And the reflection curves M1, M3, M4, and M5 are generated in the same way. Then, the starting points of each reflection curve, that is, the first reflection point of each reflection curve, are subjected to curve fitting using the high-order polynomial fitting method to generate the guiding curve M6, as Figure 4 shown.

[0081] It should be noted that the user can select the method for performing curve fitting according to requirements, such as using non-linear fitting method, spline fitting method, or implementing it with tools such as Python and MATLAB, to ensure that the generated reflection curves and the curvature of the guiding curve are smooth. Specifically, the present application does not limit this.

[0082] Step S4: Along the curved path of the guiding curve, smoothly connect the reflection curves to generate the reflecting surface of the mirror structure.

[0083] It should be noted that the user can select the method for generating the reflecting surface according to requirements to ensure that the generated reflecting surface is smooth. Specifically, the present application does not limit this.

[0084] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

[0085] In summary, the present application provides a mirror structure, a design method, and a lighting fixture. By designing multiple target irradiation line segments in the target irradiation area, generating multiple corresponding reflection cross-sections, designing multiple reflection points on each reflection cross-section, respectively performing curve fitting on the reflection points on each reflection cross-section, and performing curve fitting on the starting points of the generated reflection curves to generate a guiding curve, and then smoothly connecting the reflection curves along the curved path of the guiding curve to generate the reflecting surface of the mirror structure, and then covering the mirror structure on the lighting fixture so that the emitted light of the LED light source is reflected by the reflecting surface of the designed mirror structure to the target irradiation area. Therefore, the present application has the following beneficial effects: By designing each reflection point, adjusting the density distribution of the light reflected to the target irradiation area, compensating for the light energy attenuated due to light propagation and light scattering, and ensuring uniform distribution of the illuminance in the target irradiation area.

[0086] Therefore, the present application effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0087] The above embodiments are only illustrative of the principles and effects of the present application, and are not used to limit the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present application should still be covered by the claims of the present application.

Claims

1. A reflector structure design method, applied to the reflector structure design of a lighting fixture that covers an LED light source, characterized in that: include: A plurality of boundary points are randomly selected at the boundary of the target illumination area of ​​the lighting fixture, and each boundary point is connected with the central projection point of the LED light source to obtain a plurality of target illumination line segments, and a plurality of reflection sections perpendicular to the target illumination area are drawn with each target illumination line segment as an edge; A plurality of reflection points are designed on each reflection cross section, so that the outgoing light of the LED light source is reflected through each reflection point to the target illumination line segment corresponding to each reflection cross section, and the illumination of each target illumination line segment is evenly distributed; Performing a curve fitting operation on each reflection point on each reflection cross section to generate a reflection curve of each reflection cross section, and performing a curve fitting operation on a starting point of each reflection curve to generate a guide curve; The reflection curves are smoothly connected along the curve path of the guide curve to generate a reflection surface of the reflector structure.

2. The reflector structure design method according to claim 1, characterized in that: Methods for designing multiple reflection points on a reflection cross section include: A preset height is set above the LED light source, and a preset number of reflection points are set at equal intervals at a preset horizontal distance; The target irradiation point close to the first reflection point of the LED light source is designed to be located at an end of the corresponding target irradiation line segment away from the LED light source, and the target irradiation point far from the last reflection point of the LED light source is designed to be located at an end of the corresponding target irradiation line segment close to the LED light source; Constructing a light energy distribution decreasing model, and calculating the position of the target irradiation point of the corresponding target irradiation line segment where the outgoing light of the LED light source is reflected by the remaining reflection points respectively; Construct a light irradiation angle increasing model, and calculate the light irradiation angle of each reflection point based on it; According to the target irradiation point position of each reflection point and the light irradiation angle, the target position of each reflection point is calculated and adjusted respectively.

3. The reflector structure design method according to claim 2, characterized in that: The light energy distribution decreasing model is a quadratic function decreasing model, which satisfies the formula: Wherein, L is the length of the target irradiation line segment corresponding to the current reflection cross section; n is the arrangement sequence number of each reflection point of the current reflection cross section, and each reflection point is arranged starting from the first reflection point close to the LED light source; Δ is the decreasing coefficient, which is used to reflect the speed of decreasing light energy; is the nth reflection point P n The distance between the target irradiation point and the central projection point of the LED light source.

4. The reflector structure design method according to claim 2, characterized in that: The light irradiation angle increasing model satisfies the formula: Wherein, n is the arrangement sequence number of each reflection point of the current reflection cross section, and each reflection point is arranged starting from the first reflection point close to the LED light source; is the nth reflection point P n The light irradiation angle, is the n+1th reflection point P n+1 is the light irradiation angle; a, b, c and d are the four polynomial coefficients respectively.

5. The reflector structure design method according to claim 2, characterized in that: The method of calculating the target position of the reflection point includes: A coordinate system is constructed with the central projection point of the LED light source as the origin and the corresponding target irradiation line segment as the x-axis, and the target position of the reflection point is calculated. The calculation formula is: x n =(n-1)×l; Wherein, n is the arrangement sequence number of each reflection point of the current reflection cross section, and each reflection point is arranged starting from the first reflection point close to the LED light source; l is the preset horizontal distance between each reflection point; is the nth reflection point P n The distance between the target irradiation point and the central projection point of the LED light source; is the nth reflection point P n The light irradiation angle x n and n The nth reflection point P n target location.

6. The reflector structure design method according to claim 1, characterized in that: Ways to perform curve fitting operations include: A high-order polynomial fitting method is used to perform curve fitting on each reflection point on each reflection cross section to generate a reflection curve of each reflection cross section; The starting points of each reflection curve are fitted using a high-order polynomial fitting method to generate a guiding curve.

7. The reflector structure design method according to claim 1, characterized in that: The target irradiation area is one of a rectangle, a sector, a circle and other specific shapes.

8. A reflector structure, which is covered on an LED light source of a lighting fixture, and is designed using the reflector structure design method according to any one of claims 1 to 7, characterized in that: include: A reflective surface, the reflective surface comprising: a guide curve and a plurality of reflective curves, each reflective curve being smoothly connected along the curve path of the guide curve; each reflective curve is located at a reflective section, each reflective section is respectively perpendicular to a target illumination area of ​​the lighting fixture, and each reflective section also comprises a target illumination line segment; each target illumination line segment comprises a central projection point of the LED light source and a boundary point of the target illumination area; each reflective curve comprises a plurality of reflective points, so that the outgoing light of the LED light source is reflected through each reflective point to the target illumination line segment corresponding to each reflective section, and the illumination of each target illumination line segment is evenly distributed.

9. A lighting fixture, characterized in that: include: An LED light source and a reflector structure as claimed in claim 8, which is covered on the LED light source; Among them, the reflector structure includes: a reflective surface; the reflective surface includes: a guide curve and a plurality of reflective curves, each reflective curve is smoothly connected along the curve path of the guide curve; each reflective curve is located in a reflective section, each reflective section is perpendicular to the target illumination area of ​​the lighting fixture, and each reflective section also includes a target illumination line segment; each target illumination line segment includes the central projection point of the LED light source and a boundary point of the target illumination area; each reflective curve includes a plurality of reflection points, so that the outgoing light of the LED light source is reflected through each reflection point to the target illumination line segment corresponding to each reflection section, and the illumination of each target illumination line segment is evenly distributed.

10. The lighting fixture according to claim 9, characterized in that: Also includes: A diffusion plate is arranged on the back of the LED light source. The outgoing light of the LED light source is reflected to the diffusion plate through each reflection point of the reflector structure, and diffused to the target irradiation area through the diffusion plate.

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