CN115930167A - lighting device - Google Patents

Abstract

The present invention provides a lighting device comprising: a light outlet is arranged on the bottom wall of the shell; the scattering plate is arranged at the light outlet; the light-emitting piece is arranged in the shell and positioned on the side part of the light outlet; the reflecting piece is provided with a reflecting surface, at least part of structure of the reflecting surface is positioned at the side part of the light outlet, the reflecting surface is arranged opposite to the light emitting piece, and the reflecting surface is used for enabling at least part of emergent rays from the light emitting piece to be reflected by the reflecting surface and then irradiate the reflecting surface on the scattering plate; the distance between the first end and the plane where the light outlet is located is smaller than the distance between the second end and the plane where the light outlet is located, the scattering plate is provided with a near reflection end close to the reflection surface and a far reflection end far away from the reflection surface, and the reflection light from the second end at least partially irradiates the far reflection end of the scattering plate or an area close to the far reflection end. Through the arrangement, the effect of simulating sky illumination can be effectively ensured, and the thickness of the simulated sky lamp can be reduced.

Description

Lighting device

Technical Field

The invention relates to the technical field of illumination, in particular to an illumination device.

Background

With the social progress and the improvement of the quality of life, people pay more and more attention to the quality of life and pursue a healthy living environment. Under the large environment, a new lamp form, namely a simulated sky lamp, begins to appear in the household lighting industry in recent years. The simulated sky lamp is mainly characterized in that the sky vision effect is simulated, and the effect of simulating the oblique incidence of the solar rays into the window or the skylight is also realized.

In the related art, the simulated sky light has the technical problems of thick thickness, poor simulated sky visual effect and the like, and the use requirements of common families cannot be met.

Disclosure of Invention

It is a primary object of the present invention to provide a lighting device to solve at least one of the above-mentioned problems of the related art.

In order to achieve the above object, the present invention provides an illumination device comprising: the bottom wall of the shell is provided with a light outlet; the scattering plate is arranged at the light outlet; the light-emitting piece is arranged in the shell and is positioned on the side part of the light outlet; the reflecting piece is provided with a reflecting surface, at least part of structure of the reflecting surface is positioned on the side part of the light outlet, the reflecting surface is arranged opposite to the light emitting piece, and the reflecting surface is used for enabling at least part of emergent rays from the light emitting piece to be irradiated onto the scattering plate after being reflected by the reflecting surface; the reflecting surface is provided with a first end and a second end, the distance between the first end and the plane where the light outlet is located is smaller than the distance between the second end and the plane where the light outlet is located, the scattering plate is provided with a near reflecting end close to the reflecting surface and a far reflecting end far away from the reflecting surface, at least part of the reflecting surface is arranged to be an arc reflecting surface, the arc reflecting surface is used for enabling the reflected light rays from the first end of the reflecting surface to at least partially irradiate the near reflecting end of the scattering plate or an area close to the near reflecting end, and the reflected light rays from the second end at least partially irradiate the far reflecting end of the scattering plate or an area close to the far reflecting end.

Further, the light emitting member is disposed on the bottom wall of the housing; and/or the main optical axis of the emergent ray of the luminous element deviates from the diffusion plate.

Further, the reflective surface is arranged asymmetrically with respect to the light emitting member, and/or at least a part of the area of the curved reflective surface between the first end and the second end, and/or a concave surface of the curved reflective surface faces the diffuser plate.

Further, the curvature of the arc-shaped reflecting surface gradually decreases in a direction from the first end to the second end.

Further, an included angle between at least part of the reflected light rays from the first end and a plane where the light outlet is located is between 5 ° and 10 °, and an included angle between at least part of the reflected light rays from the second end and the plane where the light outlet is located is between 5 ° and 20 °.

Further, an included angle between at least part of the reflected light from the second end and a plane where the light outlet is located is between 10 ° and 15 °.

Further, an angle between at least a portion of the reflected light from the first end and at least a portion of the reflected light from the second end is between 0 ° and 15 °.

Further, the ratio of the horizontal distance between the first end and the second end to the vertical distance between the first end and the second end is between 0.9 and 1.8, and/or the ratio of the horizontal distance between the second end and the near reflection end to the vertical distance between the first end and the second end is greater than or equal to 1.8, and the ratio of the horizontal distance between the second end and the near reflection end to the horizontal distance between the near reflection end and the far reflection end is greater than or equal to 0.3.

Further, the distance between the first end and the second end projected on the plane where the light outlet is located is 95mm to 135mm, the distance between the first end and the second end projected on the plane perpendicular to the plane where the light outlet is located is 40mm to 60mm, and the distance between the second end and the near reflection end projected on the plane where the light outlet is located is greater than or equal to 85mm.

Furthermore, the light-emitting element is positioned outside an area formed by a connecting line between the first end and the near reflecting end and a connecting line between the second end and the far reflecting end.

Furthermore, the projection of the reflecting surface between the first end and the second end on the plane where the light outlet is located and the projection of the area between the near reflecting end and the far reflecting end on the plane where the light outlet is located are arranged at intervals.

Further, the light-emitting piece and the reflecting piece are positioned on the same side of the diffusion plate; alternatively, the light emitting member and the reflecting member are located at different sides of the diffusion plate.

Further, the illuminating part comprises a lamp panel and a plurality of LED lamp beads arranged on the lamp panel at intervals, and the lamp panel is arranged along the length direction of the reflecting part.

Furthermore, the color temperatures of at least two adjacent LED lamp beads in the plurality of LED lamp beads are different; and/or the light-emitting component further comprises a light-reflecting structural component, the light-reflecting structural component is arranged around the LED lamp beads, and the light-reflecting structural component is provided with an inclined plane which is inclined relative to the plane where the LED lamp beads are located.

By applying the technical scheme of the invention, the bottom wall of the shell is provided with the light outlet. The diffuser plate sets up in light-emitting port department, and the light-emitting component sets up in the inside of casing and is located the lateral part of light-emitting port, and the reflection part sets up in the casing to have the plane of reflection, the at least partial structure of plane of reflection is located the lateral part of light-emitting port, and the plane of reflection sets up with the light-emitting component relatively, and the plane of reflection is used for making at least part to come from the emergent ray of light-emitting component shine to the diffuser plate after the plane of reflection. Specifically, the reflecting surface has a first end and a second end, and the distance between the first end and the plane where the light outlet is located is smaller than the distance between the second end and the plane where the light outlet is located. The diffuser plate has a proximal reflective end proximate the reflective surface and a distal reflective end distal from the reflective surface. At least part of the reflecting surface is provided as an arc-shaped reflecting surface. The arc-shaped reflecting surface is used for enabling the reflected light rays from the first end of the reflecting surface to at least partially irradiate the near reflecting end or the area close to the near reflecting end of the scattering plate, and the reflected light rays from the second end of the reflecting surface to at least partially irradiate the far reflecting end or the area close to the far reflecting end of the scattering plate. Through foretell setting, a plurality of reflection light shine in proper order and set gradually along the direction of near reflection end to far-end reflection end, can avoid reflection light to appear alternately like this, and reflection light can fill whole diffuser plate again simultaneously, not only can guarantee the effect of simulation sky illumination effectively but also can reduce the thickness of simulation sky lamp like this.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic path diagram of reflected light rays of an embodiment of a lighting device according to the invention;

FIG. 2 shows an exploded view of the lighting device of FIG. 1;

FIG. 3 shows a cross-sectional schematic view of the lighting device of FIG. 2;

fig. 4 shows a perspective view of a reflector of the lighting device of fig. 2;

FIG. 5 is a schematic top view of the light emitting element of the lighting device of FIG. 2;

FIG. 6 shows a schematic diagram of the light path of the illumination device of FIG. 1;

FIG. 7 shows a schematic diagram of the illuminance at the far end of the optical path principle of FIG. 6;

fig. 8 shows a schematic diagram of the illuminance at the near-end of the optical path principle of fig. 6.

Wherein the figures include the following reference numerals:

10. a housing; 11. a light outlet; 20. a diffuser plate; 21. a near reflective end; 22. a far reflective end; 30. a light emitting member; 31. a lamp panel; 32. LED lamp beads; 33. a reflective structure; 331. a first plate body; 332. a second plate body; 40. a reflector; 41. a reflective surface; 411. a first end; 412. a second end.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 3, in the present embodiment, the lighting device includes: a case 10, a diffusion plate 20, a light emitting member 30, and a reflecting member 40. The bottom wall of the housing 10 is provided with a light outlet 11. The diffusion plate 20 is provided at the light exit 11. The light emitting member 30 is disposed in the housing 10 and located at a side of the light outlet 11. The reflection member 40 has a reflection surface 41, at least a part of the reflection surface 41 is located at a side of the light outlet 11, the reflection surface 41 is disposed opposite to the light emitting member 30, and the reflection surface 41 is used for making at least a part of the emergent light from the light emitting member 30 irradiate on the diffusion plate 20 after being reflected by the reflection surface 41. The reflecting surface 41 has a first end 411 and a second end 412, the distance between the first end 411 and the plane of the light outlet 11 is smaller than the distance between the second end 412 and the plane of the light outlet 11, the diffuser plate 20 has a near reflecting end 21 close to the reflecting surface 41 and a far reflecting end 22 far from the reflecting surface 41, at least part of the reflecting surface 41 is configured as an arc-shaped reflecting surface, the arc-shaped reflecting surface is used for enabling the reflected light from the first end 411 of the reflecting surface 41 to at least partially irradiate the near reflecting end 21 of the diffuser plate 20 or the area close to the near reflecting end 21, and the reflected light from the second end 412 to at least partially irradiate the far reflecting end 22 of the diffuser plate 20 or the area close to the far reflecting end 22.

With the technical solution of this embodiment, the bottom wall of the housing 10 is provided with a light outlet 11. The diffusion plate 20 is disposed at the light outlet 11, the light emitting element 30 is disposed inside the housing 10 and at a side of the light outlet 11, the reflection element 40 is disposed inside the housing 10 and has a reflection surface 41, at least a part of the reflection surface 41 is disposed at the side of the light outlet 11, the reflection surface 41 is disposed opposite to the light emitting element 30, and the reflection surface 41 is configured to enable at least a part of the emergent light from the light emitting element 30 to be reflected by the reflection surface 41 and then to irradiate on the diffusion plate 20. Specifically, the reflecting surface 41 has a first end 411 and a second end 412, and the distance between the first end 411 and the plane of the light outlet 11 is smaller than the distance between the second end 412 and the plane of the light outlet 11. The diffusion plate 20 has a near reflection end 21 close to the reflection surface 41 and a far reflection end 22 far from the reflection surface 41. At least part of the reflecting surface 41 is provided as an arc-shaped reflecting surface. The arc-shaped reflecting surface is used for making the reflected light from the first end 411 of the reflecting surface 41 at least partially irradiate the near reflecting end 21 of the scattering plate 20 or a region close to the near reflecting end 21, and the reflected light from the second end 412 of the reflecting surface 41 at least partially irradiate the far reflecting end 22 of the scattering plate 20 or a region close to the far reflecting end 22. Through the arrangement, a plurality of reflected light rays are sequentially irradiated and sequentially arranged along the direction from the near reflection end 21 to the far reflection end 22, so that the reflected light rays can be prevented from crossing, and meanwhile, the reflected light rays can be fully distributed on the whole scattering plate 20, so that the effect of simulating sky illumination can be effectively ensured, and the thickness of the simulated sky lamp can be reduced.

It should be noted that, the length from the near reflection end 21 to the far reflection end 22 is equally divided into 4 parts, the part near the near reflection end 21 is within one quarter of the near reflection end 21, and the part near the far reflection end 22 is within one quarter of the far reflection end 22.

Specifically, the outgoing light angle of the outgoing light of the lighting device of the present embodiment reflected by the reflection member 40 is better in the same degree, or the angle difference of the reflected light is not large, the collimation degree is relatively higher, and the sunlight transmission effect of the nature can be better and more truly simulated.

As shown in fig. 1 to 3, the reflection member 40 of the technical solution of the present embodiment is matched with the light emitting member 30, so as to redistribute the light from the light emitting member 30, fully mix the light from different LED lamp beads 32, and realize an asymmetric outgoing light distribution. Eventually, uniform illumination of the diffusion plate 20 is achieved.

Specifically, the optical model of the technical solution of the present embodiment can be simplified to a simplified model as shown in fig. 6. Where the point S is the location of the equivalent light emitting element 30, the equivalent light emitting element 30 may be a real LED, the location of an optical device (e.g., a lens or a reflector), or a virtual light emitting element 30 location obtained by back-tracking the incident light from the diffuser plate 20.

As shown in fig. 6, SM is the center direction of the equivalent luminous element 30, the light falling point of the center direction on the diffusion plate 20 is the point M, the end point of the diffusion plate 20 close to the point S is the point N, which is named as the near point, and the end point of the diffusion plate 20 far from the point S is the point F, which is named as the far point. SP is perpendicular to the diffuser plate 20NMF, and point P is the intersection point of the extension lines of SP and NMF. Then PN < PF.

An included angle of SF and SM & lt FSM = SM & lt MSN = δ.

The included angle between SP and SN is PSN = theta.

In Δ SPN, PN = SP × tan (θ).

In Δ SPM, PM = SP × tan (θ + δ).

In Δ SPF, PF = SP × tan (θ +2 δ).

Therefore, the first and second electrodes are formed on the substrate,

NM=PM-PN=SP×(tan(θ+δ)-tan(θ))

=(SP×sin(δ))/(cos(θ+δ)×cos(θ))。

MF=PF-PM=SP×(tan(θ+2δ)-tan(θ+δ))

=(SP×sin(δ))/(cos(θ+2δ)×cos(θ+δ))。

since 0 < θ < 90, 1 > cos (θ) > 0.

Since 0o < θ + δ < 90o, 1 > cos (θ + δ) > 0.

Since 0o < θ +2 δ < 90o, 1 > cos (θ +2 δ) > 0.

Since 0o < θ + δ < θ +2 δ < 90o, 1 > cos (θ) > cos (θ + δ) > cos (θ +2 δ) > 0.

Therefore, cos (θ + δ) × cos (θ) > cos (θ +2 δ) × cos (θ + δ).

Therefore, the first and second electrodes are formed on the substrate,

(SP×sin(δ))/(cos(θ+δ)×cos(θ))

＜(SP×sin(δ))/(cos(θ+2δ)×cos(θ+δ))。

therefore, NM < MF.

Because the opening angle of MF to S = the opening angle of NM to S = δ.

Assuming that the light energy distributed within the same opening angle is the same, all equal to L.

Then, the illuminance at MF = k × L/MF and the illuminance at NM = k × L/NM.

k is some positive constant.

Because NM < MF. Therefore, k × L/MF < k × L/NM.

Namely: under the same conditions of the exit ray angle and the ray energy within the angle, the illumination of the far end of the diffuser plate 20 is less than that of the near end. That is, under the same conditions, the illumination intensity at the far end of the diffusion plate 20 is lower than that at the near end. That is, the illumination intensity at the far end of the diffusion plate 20 is difficult to be increased at the near end.

Fig. 7 illustrates that the width of the rayleigh scattering plate NF covered by the light emitted from the equivalent light source is half, and the far-end illuminance of the rayleigh scattering plate is lower than the near-end illuminance when the rayleigh scattering plate is irradiated with the same energy, that is, the illuminance increasing along the irradiation direction decreases on the premise that the incident energy of the light is the same, so it is reasonable that the straight line L-M-F in fig. 7 is used for representing the illuminance trend when the light is emitted from one side.

Fig. 8 illustrates that the light emitted from the equivalent light source covers the whole rayleigh scattering plate NF, and the far-end illuminance of the rayleigh scattering plate NF is lower than the near-end illuminance when irradiated with the same energy, that is, the illuminance increasing along the irradiation direction is decreased on the premise that the incident energy of the light is the same, so it is reasonable that the straight line L-F in fig. 8 is used to represent the illuminance trend when the light is emitted from one side.

By comparing and analyzing the illuminance distribution lines in the two cases, it can be intuitively understood that the illuminance distribution illustrated in fig. 8 is better than the illuminance distribution illustrated in fig. 7. Since fig. 7 has no light irradiation between the point M of the rayleigh scattering plate and the point F of the far end, this means that the point M of the rayleigh scattering plate and the point F of the far end are darker.

It can be known from a simple comparison that the light emitted from the lens is projected to the far end of the rayleigh scattering plate as much as possible so as to improve the illumination of the far end of the rayleigh scattering plate, which is necessary for improving the uniformity of the illumination of the rayleigh scattering.

The diffusion sheet 20 of the present embodiment is a rayleigh diffusion sheet.

As shown in fig. 1 to 3, in the present embodiment, the light emitting member 30 is disposed on the bottom wall of the housing 10; the above arrangement can stabilize the position of the light emitting member 30, and can ensure that the emergent light of the light emitting member 30 is irradiated to the reflection surface 41.

As shown in fig. 1 to 4, in the present embodiment, the main optical axis of the emergent light of the light emitting element 30 is away from the diffuser plate 20. This prevents the light emitted from the light emitting member 30 from directly reaching the diffuser plate 20.

As shown in fig. 1 to 4, in the present embodiment, the reflecting surface 41 is asymmetrically arranged with respect to the light emitting member 30, and the arc-shaped reflecting surface is located at least in a partial region between the first end 411 and the second end 412, and a concave surface of the arc-shaped reflecting surface faces the diffusion plate 20. The above arrangement can ensure the reflection effect of the reflected light, i.e., ensure that the reflected light is distributed over the entire diffusion plate 20.

As shown in fig. 1 to 4, in the present embodiment, the curvature of the arc-shaped reflecting surface gradually decreases in a direction from the first end 411 to the second end 412. The above arrangement can ensure the reflection effect of the reflected light, and ensure that the reflected light at the first end 411 is reflected to the near reflection end 21 and the reflected light at the second end 412 is reflected to the far reflection end 22.

As shown in fig. 1 to 4, in the present embodiment, an angle between at least a part of the reflected light from the first end 411 and a plane of the light outlet 11 is between 5 ° and 10 °, and an angle between at least a part of the reflected light from the second end 412 and a plane of the light outlet 11 is between 5 ° and 20 °. Specifically, the included angle between the reflected light of the first end 411 and the plane where the light outlet 11 is located is 8 °, the included angle between the reflected light of the second end 412 and the plane where the light outlet 11 is located is 15 °, and the above arrangement can ensure the irradiation position of the reflected light, that is, the reflected light at the first end 411 can be reflected to the near reflection end 21, and the reflected light at the second end 412 can be reflected to the far reflection end 22.

It should be noted that, the included angle between at least part of the reflected light from the first end 411 and the plane where the light outlet 11 is located is between 5 ° and 10 °, which means that the included angle between at least part of the reflected light from the first end 411 and the plane where the light outlet 11 is located is between 5 ° and 10 °.

Preferably, the angle between at least part of the reflected light from the second end 412 and the plane of the light outlet 11 is between 10 ° and 15 °.

As shown in fig. 1 to 4, in the present embodiment, an angle between at least a portion of the reflected light from the first end 411 and at least a portion of the reflected light from the second end 412 is between 0 ° and 15 °. The above arrangement can make the reflected light rays relatively collimated, thereby avoiding the intersection before the reflected light rays are reflected to the scattering plate 20, and further ensuring the illumination effect.

As shown in fig. 1 to 4, in the present embodiment, a ratio of a horizontal distance between the first end 411 and the second end 412 to a vertical distance between the first end 411 and the second end 412 is between 0.9 and 1.8, and/or a ratio of a horizontal distance between the second end 412 and the near reflective end 21 to a vertical distance between the first end 411 and the second end 412 is greater than or equal to 1.8, and a ratio of a horizontal distance between the second end 412 and the near reflective end 21 to a horizontal distance between the near reflective end 21 and the far reflective end 22 is greater than or equal to 0.3. The lighting device can ensure the whole thickness of the lighting device to be small and ensure the lighting effect, namely the effect of sky lighting can be better simulated.

As shown in fig. 1 to 4, in the present embodiment, a projection distance between the first end 411 and the second end 412 on a plane where the light exit 11 is located is between 95mm and 135mm, a projection distance between the first end 411 and the second end 412 on a plane perpendicular to the plane where the light exit 11 is located is between 40mm and 60mm, and a projection distance between the second end 412 and the near-reflection end 21 on a plane where the light exit 11 is located is greater than or equal to 85mm. In particular, the above arrangement enables the overall structure of the lighting device to be simple, i.e., enables miniaturization. Preferably, the projection distance between the first end 411 and the second end 412 on the plane where the light outlet 11 is located is 120mm, the projection distance between the first end 411 and the second end 412 on the plane perpendicular to the plane where the light outlet 11 is located is 50mm, and the projection distance between the second end 412 and the near-reflection end 21 on the plane where the light outlet 11 is located is 100mm.

As shown in fig. 1 to 4, in the present embodiment, the light emitting element 30 is located outside an area formed by a connection line between the first end 411 and the near reflective end 21, and a connection line between the second end 412 and the far reflective end 22. The above arrangement can prevent the light emitting member 30 from interfering the reflected light, i.e. the reflected light of the reflected light can be ensured, and the blocking can be avoided.

As shown in fig. 1 to 4, in the present embodiment, a connection line between the first end 411 and the near-reflection end 21 is located above the light emitting member 30. The above arrangement can prevent the light emitting member 30 from blocking the reflected light, so that the irradiation effect is better.

As shown in fig. 1 to 4, in the present embodiment, the first end 411 is located at the side of the light outlet 11, and the second end 412 is located above the side of the light outlet 11, and the above arrangement can ensure the illumination effect.

In other embodiments, the second end 412 is located directly above the light outlet 11. This ensures that reflected light at the second end 412 is reflected to the distal reflective end 22.

As shown in fig. 1 to 4, in the present embodiment, the projection of the reflection surface 41 between the first end 411 and the second end 412 on the plane where the light outlet 11 is located is spaced from the projection of the region between the near reflection end 21 and the far reflection end 22 on the plane where the light outlet 11 is located. This effectively achieves that the reflected light spreads over the entire diffusion plate 20.

As shown in fig. 1 to 4, in the present embodiment, the light emitting member 30 and the reflecting member 40 are located on the same side of the diffusion plate 20; the arrangement enables the overall layout to be more regular.

Of course, the light emitting member 30 and the reflecting member 40 may be located on different sides of the diffusion plate 20. That is, the light emitting member 30 and the reflecting member 40 are located at both side edges of the diffusion plate 20 adjacent to each other, or the light emitting member 30 and the reflecting member 40 are located at both side edges of the diffusion plate 20 opposite to each other.

As shown in fig. 1 to 3 and 5, in the present embodiment, the light emitting member 30 includes a lamp panel 31 and a plurality of LED beads 32 disposed on the lamp panel 31 at intervals, and the lamp panel 31 is disposed along a length direction of the reflector 40. The arrangement provides a light source for the lighting device, and further realizes the lighting effect of simulating the sky.

As shown in fig. 1 to 3 and 5, in the present embodiment, at least two adjacent LED lamp beads 32 in the plurality of LED lamp beads 32 have different color temperatures; the light mixing can be fully realized by the aid of the arrangement, and accordingly sky effects at different moments or under different weathers can be better simulated.

As shown in fig. 1 to 3 and 5, in the present embodiment, the light emitting member 30 further includes a reflective structure 33, the reflective structure 33 is disposed around the LED lamp bead 32, and the reflective structure 33 has an inclined plane inclined with respect to a plane on which the LED lamp bead 32 is disposed. The provision of the reflective structure 33 effectively shows the straightening of the light so that the outgoing light remains as collimated as possible.

As shown in fig. 1 to 3 and 5, in the present embodiment, the plurality of reflective structures 33 includes a first plate 331 disposed between two adjacent LED lamp beads 32, and/or the plurality of reflective structures 33 includes a second plate 332 disposed at two ends of the plurality of LED lamp beads 32. The provision of the reflective structure 33 effectively shows the straightening of the light so that the outgoing light remains as collimated as possible.

Specifically, in this embodiment, a first plate 331 is disposed between two adjacent LED lamp beads 32, and two second plates 332 are disposed at two ends of each of the LED lamp beads 32.

As shown in fig. 1 to 3 and 5, in the present embodiment, a specular reflection surface is disposed on a side surface of the reflective structure 33 facing the LED lamp bead 32. The above arrangement enables further straightening to be achieved.

As shown in fig. 1 to 3 and 5, in the present embodiment, the distance between two adjacent specular reflection surfaces gradually increases from the direction close to the LED lamp bead 32 to the direction away from the LED lamp bead 32. The above arrangement also enables the straightening of the light.

As shown in fig. 1 to 3 and 5, in the present embodiment, the specular reflection surface includes a flat surface or an arc surface. The above arrangement can secure the irradiation direction of the light, and specifically, in the present embodiment, the specular reflection plate is a plane.

As shown in fig. 1 to fig. 3 and fig. 5, optionally, the LED lamp beads 32 are densely arranged on the lamp panel 31, which has the effect of performing sufficient light mixing, and meanwhile, the cold light LED lamp beads 32 and the warm light LED lamp beads 32 may be arranged side by side, or any combination of the white light LED lamp beads 32 and the RGB color light LED lamp beads 32 may be arranged side by side, so that sufficient light mixing may be performed, and the sky effect at different times or different weathers, such as the sky light at morning and evening, may be better simulated. The white LED lamp beads 32 may be cold LED lamp beads 32 or warm LED lamp beads 32.

As shown in fig. 1 to fig. 3 and fig. 5, optionally, a lens may also be disposed on the lamp panel 31, for example, a corresponding lens may be disposed on each LED lamp bead 32, so as to distribute light to the emergent light of the LED lamp beads 32, so as to improve the degree of collimation of the LED lamp beads 32 in the X direction, the Y direction or the XY direction, and the like, for example, reflective structures 33 are disposed on both sides of the LED lamp beads 32 in the X direction on the lamp panel 31, and the reflective structures 33 may be disposed on an inclined plane, so as to gradually increase the distance between the reflective structures 33 in the direction away from the lamp panel 31. The light reflecting structure 33 may be arranged on each LED lamp bead 32, or the light reflecting structure 33 may be arranged only on the left and right sides of the lamp panel 31. The side walls of the reflective structures 33 may also be arranged in an arc shape, and the distance between the reflective structures 33 gradually increases in the direction away from the lamp panel 31. Therefore, the collimation effect of the light-emitting piece 30 in the X direction can be improved, so that the sky light has clear boundaries in the X direction or on the left side and the right side of light spots irradiated on the wall, and the effect that sunlight penetrates through a window to irradiate on the light spots on the wall is simulated. The problem that the arc-shaped reflecting device cannot generate a light spot effect with a clear boundary is solved. Furthermore, simulation of different sky effects, such as rainbow effects, etc., may also be achieved. Specifically, when such reflection of light structure 33 was put to every LED lamp pearl 32 equipartition, the outgoing light of a plurality of RGB (red, green, blue) LED lamp pearl 32 can form clear cut-off line in the X direction, and the place that a plurality of RGB (red, green, blue) LED lamp pearl 32 outgoing light was bordered can mix the light and become the glory of other colours to can simulate the rainbow effect.

As shown in fig. 1 to 3 and 5, in the present embodiment, the light emitting element 30 further includes a lens, and the lens is located above the LED lamp bead 32. The lens can realize asymmetric light emitting, and then the reflection light that makes shine on the arc reflecting plate and reflect out can be well covered with whole scatter plate.

As shown in fig. 2 and 3, in the present embodiment, a mounting plate is disposed on an inner side wall of the housing 10 away from the light outlet 11, and the mounting bracket is mounted on the mounting plate. The mounting panel can provide the position of installation for the mounting bracket, and then makes the position of mounting bracket more stable, and specifically, mounting bracket and mounting panel pass through the fastener and connect.

As shown in fig. 2 and 3, in the present embodiment, the reflecting member includes a mounting bracket on which the reflecting surface 41 is mounted, and the mounting bracket is fixed in the housing 10. The arrangement of the mounting bracket can make the position of the reflecting surface 41 more stable.

As shown in fig. 2 and 3, in the present embodiment, the mount includes a first connection plate and a plurality of second connection plates connected on a surface of the first connection plate, and the reflection surface 41 is installed on a side of the plurality of second connection plates away from the first connection plate. The first connecting plate and the second connecting plate are simple in structure and convenient to set. Meanwhile, the arrangement of the plurality of second connecting plates can ensure the stability of the position of the reflecting surface 41.

As shown in fig. 2 and 3, in the present embodiment, the distance between the surface of the second connecting plate away from the first connecting plate and the first connecting plate gradually decreases in the direction from the top of the reflector to the bottom of the reflector. Specifically, the surface of the second connecting plate, which is far away from the first connecting plate, is provided with an inner concave notch, and the shape of the inner concave notch is the same as that of the reflecting surface 41, so that the reflecting surface 41 is installed at the inner concave notch, and thus the position of the reflecting surface 41 can be more stable.

As shown in fig. 2 and 3, in the present embodiment, a heat dissipation portion is provided on the bottom wall of the housing 10, the heat dissipation portion is located on the side of the light exit 11, and the light emitting element 30 is attached to the heat dissipation portion. The heat dissipation part can effectively dissipate heat of the light emitting member 30, and thus, the over-high temperature of the light emitting member 30 can be avoided.

Specifically, the heat dissipation part includes a support plate and a plurality of heat dissipation fins connected to the support plate, the support plate is located between the heat dissipation fins and the light emitting member 30, the heat dissipation area can be increased by the heat dissipation fins, the light emitting member 30 is installed on the support plate, and the heat is transferred to the heat dissipation fins through the support plate, so that heat dissipation is realized.

In an embodiment not shown in the drawings, the light emitting element 30 irradiates the reflective surface 41 and forms a plurality of reflected light beams, and the plurality of reflected light beams in the direction from the first end 411 to the second end 412 irradiate onto the diffuser plate 20 sequentially along the direction from the far reflective end 22 to the near reflective end 21. The light-emitting member 30 irradiates onto the reflection surface 41 and forms a plurality of reflected light rays, and the plurality of reflected light rays in the direction from the first end 411 to the second end 412 irradiate onto the diffusion plate 20 in sequence along the direction from the far reflection end 22 to the near reflection end 21. That is, the reflected light at the first end 411 is reflected to the far reflective end 22, and the reflected light at the second end 412 is reflected to the first near reflective end 21, so that the height of the reflector 40 is small, and the reflected light can be distributed over the whole diffuser plate 20 under the action of the reflector 40, thereby ensuring the irradiation effect of the sky. Therefore, the thickness of the box body can be smaller on the premise that the height of the arc-shaped reflecting device is smaller.

The reflected light from the first end 411 of the reflector 40 covers the area of the far reflective end 22 of the diffuser plate 20, and the reflected light from the second end 412 of the reflector 40 only needs to cover the area of the near reflective end 21 of the diffuser plate 20. The second end 412 of the reflector 40 does not need to cover the far reflective end 22 of the diffuser plate 20, so that the height of the reflector 40 does not need to be set large, and thus the reflector 40 can be thinner, thereby enabling the thickness of the whole lighting device to be thinner.

The curvature of the middle portion of the reflecting surface 41 is larger than the curvatures of both end portions of the reflecting surface 41 in the direction from the first end 411 to the second end 412. The arrangement can effectively ensure that the reflected light can be reflected to the scattering plate 20 and can be fully distributed on the scattering plate 20, so that the illumination effect is improved. Specifically, in the present embodiment, the curvature at the first end 411 is greater than the curvature of the second end 412.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (14)

1. An illumination device, comprising:

the light source comprises a shell (10), wherein a light outlet (11) is formed in the bottom wall of the shell (10);

a diffuser plate (20) disposed at the light exit (11);

the light emitting piece (30) is arranged in the shell (10) and is positioned on the side part of the light outlet (11);

the reflecting piece (40) is provided with a reflecting surface (41), at least part of the reflecting surface (41) is positioned at the side part of the light outlet (11), the reflecting surface (41) is arranged opposite to the light emitting piece (30), and the reflecting surface (41) is used for enabling at least part of emergent light rays from the light emitting piece (30) to be irradiated onto the scattering plate (20) after being reflected by the reflecting surface (41);

wherein the reflection surface (41) has a first end (411) and a second end (412), the first end (411) is located at a smaller distance from the plane of the light outlet (11) than the second end (412) is located at the plane of the light outlet (11), the diffuser plate (20) has a near reflection end (21) close to the reflection surface (41) and a far reflection end (22) far away from the reflection surface (41), at least part of the reflection surface (41) is configured as an arc-shaped reflection surface, the arc-shaped reflection surface is used for enabling the reflection light from the first end (411) of the reflection surface (41) to at least partially irradiate the near reflection end (21) of the diffuser plate (20) or an area close to the near reflection end (21), and the reflection light from the second end (412) at least partially irradiates the far reflection end (22) of the diffuser plate (20) or an area close to the far reflection end (22).

2. A lighting device as claimed in claim 1, characterized in that said luminous element (30) is arranged on a bottom wall of said casing (10); and/or the main optical axis of the emergent ray of the luminous element (30) is away from the diffusion plate (20).

3. A lighting device as claimed in claim 1, characterized in that said reflecting surface (41) is arranged asymmetrically with respect to said luminous element (30), and/or in that said curved reflecting surface is located at least in a partial region between said first end (411) and said second end (412), and/or in that the concavity of said curved reflecting surface is directed towards said diffuser plate (20).

4. A lighting device as recited in claim 1, wherein the curvature of said curved reflective surface gradually decreases in a direction from said first end (411) to said second end (412).

5. A luminaire as claimed in claim 1, characterized in that the angle between at least part of the reflected light rays from the first end (411) and the plane of the light exit opening (11) is between 5 ° and 10 °, and the angle between at least part of the reflected light rays from the second end (412) and the plane of the light exit opening (11) is between 5 ° and 20 °.

6. A lighting device as claimed in claim 5, wherein an angle between at least part of said reflected light rays from said second end (412) and a plane in which said light outlet (11) is located is between 10 ° and 15 °.

7. A lighting device as recited in any one of claims 1-6, wherein an angle between at least part of said reflected light rays from said first end (411) and at least part of said reflected light rays from said second end (412) is between 0 ° and 15 °.

8. A lighting device as claimed in any one of claims 1 to 6, characterized in that the ratio between the horizontal distance from the first end (411) to the second end (412) and the vertical distance from the first end (411) to the second end (412) is between 0.9 and 1.8, and/or the ratio between the horizontal distance between the second end (412) and the near reflecting end (21) and the vertical distance from the first end (411) to the second end (412) is greater than or equal to 1.8, and the ratio between the horizontal distance between the second end (412) and the near reflecting end (21) and the horizontal distance from the near reflecting end (21) to the far reflecting end (22) is greater than or equal to 0.3.

9. The lighting device according to any one of claims 1 to 6, wherein a projection distance between the first end (411) and the second end (412) on a plane where the light outlet (11) is located is 95mm to 135mm, a projection distance between the first end (411) and the second end (412) on a plane perpendicular to the light outlet (11) is 40mm to 60mm, and a projection distance between the second end (412) and the near-reflection end (21) on a plane where the light outlet (11) is located is 85mm or more.

10. A lighting device as claimed in any one of claims 1 to 6, wherein said light emitting element (30) is located outside the region formed by the line connecting said first end (411) and said proximal reflecting end (21) and the line connecting said second end (412) and said distal reflecting end (22).

11. A lighting device as claimed in any one of claims 1 to 6, wherein a projection of a reflective surface between the first end (411) and the second end (412) onto a plane in which the light exit opening (11) is located is spaced from a projection of an area between the near reflective end (21) and the far reflective end (22) onto a plane in which the light exit opening (11) is located.

12. A lighting device as claimed in any one of claims 1 to 6, characterized in that said luminous element (30) is located on the same side of said diffuser plate (20) as said reflecting element (40); alternatively, the light emitting member (30) and the reflecting member (40) are located on different sides of the diffusion plate (20).

13. The lighting device according to any one of claims 1 to 6, wherein the light emitting member (30) comprises a lamp panel (31) and a plurality of LED beads (32) arranged on the lamp panel (31) at intervals, and the lamp panel (31) is arranged along a length direction of the reflector (40).

14. The lighting device according to claim 13, wherein at least two adjacent LED lamp beads (32) of the plurality of LED lamp beads (32) have different color temperatures; and/or, luminous component (30) still include reflection of light structure spare (33), reflection of light structure spare (33) arrange around LED lamp pearl (32), reflection of light structure spare (33) have for the inclined plane of LED lamp pearl (32) place plane slope.

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