CN115574288A

CN115574288A - Simulated sky lighting device

Info

Publication number: CN115574288A
Application number: CN202211214711.XA
Authority: CN
Inventors: 王国建
Original assignee: Qingdao Yilai Intelligent Technology Co Ltd
Current assignee: Qingdao Yilai Intelligent Technology Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-01-06

Abstract

The invention provides a simulated sky lighting device, comprising: the light emitting plate comprises a plurality of light reflecting pieces arranged between the first surface and the second surface at intervals along a first light incidence direction, the plurality of light reflecting pieces comprise first reflecting inclined planes facing the first light incidence direction, and the first reflecting inclined planes are used for guiding at least part of first light rays incident along the first light incidence direction to the second surface; and the scattering plate is positioned on one side of the second surface, which is far away from the first surface, and is used for converting emergent rays of the direct surface light source into first diffused light and second transmitted light to be emitted outwards. The technical scheme of this application has solved the great problem of thickness of lamps and lanterns among the correlation technique effectively.

Description

Simulated sky lighting device

Technical Field

The invention relates to the technical field of lighting, in particular to a simulated sky lighting 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 circumstances, a new lamp form, namely a simulated sky lamp, or a blue sky lamp, a sky lamp, and the like, begins to appear in the household lighting industry in recent years. The main characteristic of the simulated sky lamp is the simulated sky visual effect.

In the related art, in order to better simulate the sky vision effect, the light source in the blank lamp is obliquely irradiated, and in order to enable the light emitted by the light source to be fully distributed at the light outlet, the distance between the light source and the light outlet is larger, so that the thickness of the lamp is larger.

Disclosure of Invention

The invention mainly aims to provide a simulated sky lighting device to solve the problem of large thickness of lamps in the related art.

In order to achieve the above object, the present invention provides a simulated sky lighting device, comprising: the light emitting plate is provided with a first surface and a second surface which are arranged oppositely, and a first side part and a second side part which are connected with the first surface and the second surface, the first side part is provided with a first light source installation part, the light emitting device is arranged on the first light source installation part, the light emitting plate comprises a plurality of light reflecting pieces which are arranged between the first surface and the second surface at intervals along a first light incidence direction, the plurality of light reflecting pieces comprise first reflecting inclined planes facing the first light incidence direction, and the first reflecting inclined planes are used for guiding at least part of first light incident along the first light incidence direction to the second surface; and the scattering plate is positioned on one side of the second surface far away from the first surface and is used for converting the emergent rays of the direct surface light source into first diffused light and second transmitted light to be emitted outwards.

Further, the first surface and the second surface of the light emitting plate are arranged in parallel, and/or the minimum distance between the plurality of first reflection inclined planes arranged at intervals along the first light incidence direction and the second surface is gradually reduced along the first light incidence direction.

Furthermore, the first reflection inclined plane has a preset light transmittance, and the light transmittance of the first reflection inclined planes of the plurality of light reflecting pieces is gradually reduced along the first light incidence direction; and/or the first reflection inclined plane has a preset reflectivity, and the reflectivity of the first reflection inclined planes of the plurality of reflection pieces is gradually increased along the first light incidence direction, and/or the height of the first inclined plane groove walls of the plurality of first reflection grooves is gradually increased along the light incidence direction.

Furthermore, the plurality of light reflecting pieces are a plurality of first light reflecting grooves which are arranged on the first surface and are recessed towards the inside of the light emitting plate, and the first reflecting inclined plane is a first inclined plane groove wall of the first light reflecting groove; the minimum distance between the first inclined groove wall and the second surface is gradually reduced along the first light incidence direction, and/or the height of the first inclined groove wall of the plurality of first light reflecting grooves is gradually increased along the first light incidence direction.

Furthermore, each first light reflecting groove also comprises a first straight groove wall connected with the first inclined groove wall; and/or the height difference value of two adjacent first inclined groove walls is the same in the direction of the first incident light direction; and/or the inclination angles of the groove walls of the plurality of first inclined planes are the same; and/or the length difference of any two adjacent first inclined groove walls is the same along the first light incidence direction.

Further, the light-transmitting medium is accommodated in the first light reflecting groove, wherein the refractive index of the light-emitting plate is greater than that of the light-transmitting medium; and/or the inner surface of the first light reflecting groove is provided with a light reflecting coating.

Furthermore, the plurality of light reflecting pieces are arranged in an array mode, and the minimum distances between the plurality of light reflecting pieces arranged in the direction perpendicular to the first light incidence direction and the second surface are the same.

Furthermore, the simulated sky lighting device also comprises a light condensing structure arranged on the second surface, wherein the light condensing structure is used for condensing emergent light rays of the second surface, the light condensing structure is a plurality of arc-shaped bulges which are arranged on the second surface and protrude outwards, or the light condensing structure is a plurality of Fresnel lens structures arranged on the second surface; or the light-gathering structure is a rotational symmetric structure.

Furthermore, the second side portion is provided with a second light source installation portion, the light reflecting piece further comprises a plurality of second light reflecting grooves, the second light reflecting grooves are formed in the first surface, the second light reflecting grooves and the first light reflecting grooves are arranged in a reverse mode, and each second light reflecting groove is provided with a second inclined groove wall and a second straight groove wall which are connected with each other.

Further, an included angle between the first sloped slot wall and the second sloped slot wall is between 80 ° and 100 °.

Furthermore, the LED lamp further comprises a light shielding plate, wherein the light shielding plate comprises a light blocking area and a light emitting area, the light emitting area is arranged corresponding to the plurality of light gathering structures, and the light blocking area is used for preventing at least part of large-angle stray light from being emitted from the light emitting area.

Furthermore, a light shielding plate is positioned between the light emitting plate and the scattering plate, wherein the light shielding plate is positioned between the light gathering structure of the light emitting plate and the scattering plate; and/or the light shading plate is positioned between the light condensing structure of the light extraction plate and the focus of the light condensing structure.

By applying the technical scheme of the invention, the direct light surface light source is provided with the light emitting plate and the light emitting device, the light emitting plate is provided with a first surface, a second surface, a first side part and a second side part, the first surface and the second surface are oppositely arranged, and the first side part and the second side part are oppositely arranged and positioned between the first surface and the second surface. The first side portion is provided with a first light source mounting portion, and the light emitting device is arranged on the first light source mounting portion. The light-emitting plate comprises a plurality of light reflecting pieces, the light reflecting pieces are located between the first surface and the second surface, and the plurality of light reflecting pieces comprise first reflecting inclined planes facing to a first light-entering direction. The first reflecting inclined plane is used for guiding at least part of the first light rays incident along the first light incidence direction to the second surface. The diffusion plate is located on one side, far away from the first surface, of the second surface and used for converting emergent rays of the direct surface light source into first diffused light and second transmitted light to be emitted outwards. The color temperature of the second transmitted light is lower than the color temperature of the first diffused light by the above setting. When the light emitting device irradiates from the first light source installation part, the first light is reflected to the second surface by the reflecting piece, and is specifically reflected under the action of the first reflection inclined plane, so that the second surface can be ensured to be fully distributed with the first light, the illumination can be effectively realized, the illumination effect can be ensured, the light mixing can be realized under the action of the scattering plate, and the illumination effect of the simulated sky can be better realized. The thickness of the skylight can be reduced compared to the prior art. Therefore, the technical scheme of the application effectively solves the problem that the thickness of the lamp in the related art is large.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) 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 cross-sectional view of an embodiment of a simulated sky lighting arrangement according to the invention;

fig. 2 shows a schematic top view of the simulated sky lighting arrangement of fig. 1;

fig. 3 shows a schematic side view of the simulated sky lighting arrangement of fig. 1;

FIG. 4 illustrates a schematic cross-sectional view of the simulated sky lighting apparatus of FIG. 1 having a first light source mount and a second light source mount;

fig. 5 shows a schematic top view of the simulated sky lighting arrangement of fig. 4;

FIG. 6 shows a schematic view of the ray of FIG. 1 passing through an arcuate bulge;

FIG. 7 shows the ray diagram of FIG. 6;

fig. 8 shows a schematic view of the direction of refraction of the light rays of fig. 1.

Wherein the figures include the following reference numerals:

10. directly irradiating the surface light source; 11. a light emitting plate; 111. a first surface; 112. a second surface; 113. a first side portion; 1131. a first light source mounting section; 114. a second side portion; 1141. a second light source mounting section; 115. a light-reflecting member; 1151. a first reflective slope; 1152. a second reflective slope; 1153. a first reflective groove; 11531. a first sloped slot wall; 11532. a first straight slot wall; 1154. a second reflective groove; 11541. a second inclined groove wall; 11542. a second straight slot wall; 12. a light emitting device; 20. a diffuser plate; 30. a light-gathering structure; 31. an arc-shaped bulge; 40. a visor; 41. a light blocking area; 42. and a light emitting area.

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 obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection 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 exemplary 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 6, in the present embodiment, the simulated sky lighting device includes: direct light source 10 and diffusion plate 20. The direct light source 10 has a light emitting plate 11 and a light emitting device 12, wherein the light emitting plate 11 has a first surface 111 and a second surface 112 disposed opposite to each other, and a first side 113 and a second side 114 connected to the first surface 111 and the second surface 112, the first side 113 has a first light source mounting portion 1131, the light emitting device 12 is disposed on the first light source mounting portion 1131, the light emitting plate 11 includes a plurality of light reflecting members 115 disposed between the first surface 111 and the second surface 112 at intervals along a first light incident direction, the plurality of light reflecting members 115 include a first reflection inclined surface 1151 facing the first light incident direction, and the first reflection inclined surface 1151 is configured to guide at least a part of first light incident along the first light incident direction to the second surface 112. The diffusion plate 20 is located on a side of the second surface 112 away from the first surface 111, and the diffusion plate 20 is used for converting the emergent light of the direct surface light source 10 into a first diffused light and a second transmitted light to be emitted outwards.

By applying the technical solution of the present embodiment, the direct-light surface light source 10 has the light emitting plate 11 and the light emitting device 12, the light emitting plate 11 has a first surface 111, a second surface 112, a first side portion 113 and a second side portion 114, the first surface 111 and the second surface 112 are oppositely disposed, and the first side portion 113 and the second side portion 114 are oppositely disposed and located between the first surface 111 and the second surface 112. The first side portion 113 has a first light source mounting portion 1131, and the light emitting device 12 is disposed at the first light source mounting portion 1131. The light extraction plate 11 comprises a plurality of light reflectors 115, the light reflectors 115 are located between the first surface 111 and the second surface 112, and the plurality of light reflectors 115 comprise a first reflective inclined surface 1151 facing the first incident light direction. The first reflecting slope 1151 is used for guiding at least a portion of the first light rays incident along the first light incident direction to the second surface 112. The diffusion plate 20 is located on a side of the second surface 112 away from the first surface 111, and the diffusion plate 20 is used for converting the emergent light of the direct surface light source 10 into a first diffused light and a second transmitted light to be emitted outwards. The color temperature of the second transmitted light is lower than that of the first diffused light by the setting, so that the real blue sky effect is simulated. When the light emitting device 12 irradiates from the first light source mounting portion 1131, the first light is reflected to the second surface 112 by the reflective member 115, specifically, reflected under the action of the first reflective inclined surface 1151, so that the second surface 112 can be fully covered with the first light, the conversion from a point light source or a line light source to a surface light source is realized, and the size and thickness are thinner; compared with the prior art that the light source can only be pulled far as possible to cover a larger light emitting area, the simulated sky lighting lamp is thinner. Thus, illumination can be effectively realized, the illumination effect can be ensured, rayleigh scattering can be realized under the action of the scattering plate 20, and the irradiation effect of the simulated sky can be better realized. The thickness of the skylight can be reduced compared to the prior art. Therefore, the technical scheme of the embodiment effectively solves the problem that the thickness of the lamp in the related art is large.

As shown in fig. 2 to 8, in the present embodiment, the diffusion sheet 20 is a rayleigh diffusion sheet.

As shown in fig. 1 to 8, in the present embodiment, the first surface 111 and the second surface 112 of the light-emitting plate 11 are arranged in parallel, and the above arrangement can ensure the light-emitting effect.

As shown in fig. 1 to 6, in the present embodiment, the minimum distance between the plurality of first reflecting inclined surfaces 1151 spaced apart from the second surface 112 along the first light incident direction gradually decreases along the first light incident direction. That is, the height of the light reflecting member 115 is higher and higher or is closer to the second surface 112, so as to avoid being blocked by the light reflecting member 115 of the previous stage, the above arrangement enables the first light to be reflected by the plurality of first reflecting slopes 1151, that is, the emergent light of the light emitting device 12 or the light source can be transmitted to the plurality of light reflecting members 115 in a stage-by-stage manner to be reflected and be emitted through the second surface 112, thereby realizing the conversion of the point light source or the line light source to the surface light source. Specifically, the heights of the plurality of first reflection inclined planes 1151 may gradually increase along the first light incident direction.

As shown in fig. 1 to 5, in the present embodiment, the second side portion 114 has a second light source mounting portion 1141, and the light reflector 115 further includes a second reflecting inclined surface 1152, where the second reflecting inclined surface 1152 is used for guiding at least a part of the second light incident along the second light incident direction to the first surface 111. The minimum distance between the plurality of second reflection slopes 1152 and the first surface 111 gradually decreases along the second light incident direction, and/or the first reflection slope 1151 and the second reflection slope 1152 are located at two sides of the light reflecting member 115, wherein the minimum distance between the light reflecting member 115 and the second surface 112 gradually decreases along the first light incident direction, and the minimum distance between the light reflecting member 115 and the first surface 111 gradually decreases along the second light incident direction. The above arrangement enables simultaneous irradiation of the first side portion 113 and the second side portion 114. This makes it possible to obtain a better refraction effect of the light extraction panel 11 and thus also to ensure the effect of the illumination. In particular, the above arrangement enables double-sided illumination.

As shown in fig. 1 to 5, in the present embodiment, the first reflective inclined plane 1151 has a predetermined light transmittance, and the light transmittance of the first reflective inclined plane 1151 of the plurality of light reflectors 115 is gradually decreased along the first light incident direction; and/or the first reflecting slope 1151 has a predetermined reflectivity, and the reflectivity of the first reflecting slope 1151 of the plurality of light reflecting members 115 increases along the first light incident direction. The arrangement can effectively enable part of the light to be reflected to the second surface 112 for emergence when passing through the first reflection inclined plane 1151, and part of the light continues to propagate to the next-stage light reflecting piece 115 through the first reflection inclined plane 1151, so that a point light source or a line light source is converted into a surface light source for emergence.

As shown in fig. 1 to 8, in the present embodiment, the plurality of light reflecting members 115 are a plurality of first light reflecting grooves 1153, the plurality of first light reflecting grooves 1153 are disposed on the first surface 111 and are recessed toward the inside of the light-emitting plate 11, and the first reflecting inclined surfaces 1151 are first inclined groove walls 11531 of the first light reflecting grooves 1153. Wherein, the minimum distance between the first beveled groove wall 11531 and the second surface 112 is gradually reduced along the first light incident direction. The first reflective groove 1153 can effectively reduce the processing difficulty, and because the refractive index of air is smaller than that of the reflective member 115, when the incident light passes through the interface between air and the reflective member 115, i.e., the first inclined groove wall 11531, total reflection occurs, so as to achieve the purpose that the incident light is turned to the second surface 112 for emission.

As shown in fig. 1 to 8, in the present embodiment, each of the first light reflecting grooves 1153 further includes a first straight groove wall 11532 connected to the first sloped groove wall 11531; and/or in the direction of the first incident light direction, the height difference values of two adjacent first inclined groove walls 11531 are the same; and/or the plurality of first sloped slot walls 11531 have the same slope angle; and/or the length difference between any two adjacent first sloping groove walls 11531 in the first light incidence direction is the same. The inclination angles of the first inclined groove walls 11531 are the same, so that the inclination angles of the reflected light rays can be close, and the collimation rate of the emergent light rays is improved. The height difference between the adjacent first inclined groove walls 11531 is the same, so that the reflecting area of each stage of the light reflecting member 115 is ensured to be the same, that is, the quantity of the light reflected by each stage of the light reflecting member is the same, and thus, the uniformity of the light output on the second surface 112 is ensured. When the inclination angles of the first inclined groove walls 11531 are the same, the length difference of the first inclined groove walls 11531 is the same, and it can also be ensured that the area difference of each stage of the light reflecting member 115 is the same, that is, the reflection area is the same, and it can be ensured that the light emitted from the second surface 112 is uniform.

As shown in fig. 1 to 8, in the present embodiment, the first light reflecting groove 1153 contains a light transmitting medium therein, and the refractive index of the light exiting plate 11 is greater than that of the light transmitting medium; and/or the inner surface of the first light reflecting groove 1153 is provided with a light reflecting coating. The arrangement described above enables better reflection of light. Specifically, in order to enhance the structural strength of the light-emitting plate 11, the first light-reflecting groove 1153 may also contain a light-transmitting medium, wherein, in order to realize total reflection of the light rays at the first reflecting inclined plane 1151, preferably, the refractive index of the light-emitting plate 11 is greater than that of the light-transmitting medium. I.e. when light is directed from an optically dense medium to an optically sparse medium, total emission is relatively easy to occur. Thereby increasing the light utilization efficiency and ensuring that more light is reflected and exits the second surface 112. In order to further improve the light utilization rate, a reflective coating may be further disposed on the inner surface of the first reflective groove 1153 or the first reflective inclined surface 1151.

As shown in fig. 1 to 8, in the present embodiment, the plurality of light reflectors 115 are arranged in an array, and the minimum distances between the plurality of light reflectors 115 arranged in a direction perpendicular to the light incident direction and the second surface 112 are the same. Therefore, the same reflection area of the light reflecting member 115 perpendicular to the light incident surface and the same number of reflected light rays can be realized, thereby ensuring the uniform light emission of the second surface 112.

As shown in fig. 1 to fig. 8, in the present embodiment, the simulated sky lighting device further includes a light condensing structure 30 disposed on the second surface 112, where the light condensing structure 30 is used for condensing the emergent light of the second surface 112, where the light condensing structure 30 is a plurality of arc-shaped protrusions 31 disposed on the second surface 112 and protruding outward, or the light condensing structure 30 is a plurality of fresnel lens structures disposed on the second surface 112; or the light concentrating structure 30 is a rotationally symmetric structure. The arc-shaped protrusion 31 enables focusing of light, which enables better illumination of light. And because the first inclined groove wall 11531 and one arc-shaped protrusion 31 are correspondingly arranged, the irradiation of light can be further ensured, and the light loss can be avoided. The divergent action of the arc-shaped protrusions 31 on the incident collimated light can increase the chances of intersection and mixing of the light emitted from the arc-shaped protrusions 31 adjacent to the light emitting surface side of the light emitting plate 11, and the improvement of the illuminance distribution uniformity of the light emitted from the arc-shaped protrusions 31 on the rayleigh scattering plate is facilitated.

As shown in fig. 1 to 8, in the present embodiment, the second side portion 114 has a second light source mounting portion 1141, the light reflecting member 115 further includes a plurality of second light reflecting grooves 1154, the plurality of second light reflecting grooves 1154 are disposed on the first surface 111, the plurality of second light reflecting grooves 1154 and the plurality of first light reflecting grooves 1153 are oppositely disposed, and each of the second light reflecting grooves 1154 has a second inclined groove wall 11541 and a second straight groove wall 11542 that are connected to each other. The above arrangement enables irradiation in a plurality of directions. Specifically, the light-emitting area of the second surface 112 is increased, and under the condition that the thickness of the light-emitting plate is constant, the maximum height of the light-reflecting part is limited, so that the number of the light-reflecting parts arranged in one stage is limited, and the light-emitting area is limited, therefore, the light-emitting area of the light guide plate can be doubled by symmetrically arranging the second light sources at the second side part and symmetrically arranging the second light-reflecting grooves. Of course, light extraction in multiple directions can also be realized.

It should be noted that the above-mentioned "reverse arrangement" refers to left-right reverse arrangement, or left-right symmetrical arrangement, so as to increase the length of the light emitting plate as much as possible without increasing the thickness of the light emitting plate, and further increase the light emitting area, thereby solving the technical problem of small size of the sky lamp in the prior art.

As shown in fig. 1-8, in this embodiment, the included angle between the first and second sloped slot walls 11531, 11541 is between 80 ° and 100 °. The above arrangement enables angular refraction.

As shown in fig. 1 to 8, in the present embodiment, the simulated sky lighting device further includes a light shielding plate 40, the light shielding plate 40 includes a light blocking region 41 and a light exiting region 42, the light exiting region 42 is disposed corresponding to the plurality of light collecting structures 30, and the light blocking region 41 is configured to prevent at least a part of the large-angle stray light from exiting from the light exiting region 42. The light exit region 42 is a plurality of light exit holes, and the plurality of light exit holes and the plurality of arc-shaped protrusions 31 are arranged in one-to-one correspondence. The light emitting plate 11 can refract light and ensure the illumination effect. Specifically, in the simulated sky lighting device, the light emitting device 12 is disposed at the first side 113, and the light is refracted out through the light outgoing plate 11, so that the light outgoing port on the shell of the simulated sky lighting device is full of light, the illumination effect can be ensured, and the thickness of the shell can be reduced. Meanwhile, the divergence effect of the light outlet hole on the incident collimated light can increase the chances of intersection and mixing of the light emitted from the arc-shaped protrusion 31 adjacent to the light outlet side of the light emitting device 12, and the improvement of the illumination distribution uniformity of the light from the arc-shaped protrusion 31 on the Rayleigh scattering plate is facilitated.

As shown in fig. 1 to 8, in the present embodiment, the light shielding plate 40 is located between the light extraction plate 11 and the diffusion plate 20, wherein the light shielding plate 40 is located between the light condensing structure 30 of the light extraction plate 11 and the focus of the light condensing structure 30. The above arrangement can ensure the irradiation of light. Meanwhile, the arrangement can ensure that emergent rays of adjacent light-emitting holes can be mutually contacted to realize light mixing. Meanwhile, because emergent rays pass through the condensation of the condensation structure 30, only few large-angle stray rays are left, namely a few large-angle stray rays are distinguished from other emergent rays as far as possible, the large-angle stray rays are shaded through the light shading plate 40 at the moment, the stray rays filtering efficiency is improved, meanwhile, the mistaken filtering of other emergent rays is avoided as much as possible, and the light emergence rate is improved. In order to further promote stray light's filtration accuracy, can arrange light screen 40 in the focus range of spotlight structure 30, arrange between spotlight structure 30 and spotlight structure 30's focus promptly, this moment, because most light passes through spotlight structure 30 back exit angle and assembles near the focus, whole light beam is the state of assembling promptly, and at this moment, remaining partial wide-angle stray light is distinguished with other light more easily, is filtered by the accurate of light screen 40 more easily. From this, when having promoted stray light's filtering accuracy, avoided the mistake to other emergent rays to filter, further promoted the light-emitting rate.

As shown in fig. 1 to 8, in the present embodiment, the diffusion plate 20 is spaced apart from the light extraction plate 11. The above arrangement enables better mixing of the light rays, so that the light reaching the diffuser plate 20 is distributed more uniformly.

As shown in fig. 1 to 8, in this embodiment, the central point of the arc-shaped protrusion 31 is assumed to be a point a, a bus arc ab or arc ac of the arc-shaped protrusion 31 can be obtained by making a cross section from the point a, the arc surface of the arc-shaped protrusion 31 can be obtained by making a 360-degree rotation operation on the bus (arc ab or arc ac), and the effect of the arc surface bc is analyzed by taking two boundary light rays bd and cf as examples. Collimated light rays bd and cf can be deflected to form light rays bo after passing through an arc bc, light rays cf are deflected to form light rays co after passing through the arc bc, light rays ao on the central axis of the arc-shaped protrusion 31 pass through the arc bc and are in the same direction as original light rays ae, and the light rays bo, the light rays ao and the light rays co are converged at a point o. After point o, ray bo keeps progressing direction oi, ray ao keeps progressing direction oh, and ray co keeps progressing direction og. Therefore, after the point o of the junction, the outgoing rays oi, oh, and og diverge corresponding to the incident collimated rays bd, ae, and cf.

Specifically, in the present embodiment, the arc surface of the arc protrusion 31 may be a spherical surface, or may be an aspherical surface. The distribution density of the arc-shaped protrusions 31 is the same as that of the light reflectors 115, and the arc-shaped protrusions 31 are located just above the first light-reflecting grooves 1153, which helps the light reflected from the first light-reflecting grooves 1153 to efficiently exit from the arc-shaped protrusions 31, thereby improving the optical efficiency.

In the description of the present invention, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular 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" and "at 8230; \8230; below". 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 unless otherwise stated, the terms have no special meaning, 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

1. A simulated sky lighting apparatus, comprising:

a direct light source (10) having a light emitting panel (11) and a light emitting device (12), wherein the light emitting panel (11) has a first surface (111) and a second surface (112) which are arranged opposite to each other, and a first side portion (113) and a second side portion (114) which are connected to the first surface (111) and the second surface (112), the first side portion (113) has a first light source installation portion (1131), the light emitting device (12) is arranged on the first light source installation portion (1131), the light emitting panel (11) includes a plurality of light reflecting members (115) which are arranged between the first surface (111) and the second surface (112) at intervals along a first light incident direction, the plurality of light reflecting members (115) include a first reflection slope (1151) facing the first light incident direction, and the first reflection slope (1151) is used for guiding at least part of the first light incident along the first light incident direction to the second surface (112);

and the diffusion plate (20) is positioned on the side, away from the first surface (111), of the second surface (112), and the diffusion plate (20) is used for converting emergent rays of the direct area light source (10) into first diffused light and second transmitted light to be emitted outwards.

2. A simulated sky lighting device as claimed in claim 1, characterized in that said first surface (111) and said second surface (112) of said light extraction panel (11) are arranged parallel to each other and/or that a minimum distance of a plurality of said first reflecting slopes (1151) provided at intervals along said first light entrance direction from said second surface (112) gradually decreases along said first light entrance direction.

3. A simulated sky lighting device as claimed in claim 1, characterized in that said first reflecting slope (1151) has a preset light transmittance, and in said first light entering direction the light transmittance of said first reflecting slope (1151) of said plurality of light reflectors (115) is gradually decreasing; and/or the first reflection inclined plane (1151) has a preset reflectivity, and the reflectivity of the first reflection inclined plane (1151) of the plurality of light reflecting pieces (115) is gradually increased along the first light incidence direction.

4. A simulated sky lighting device as claimed in claim 1, characterized in that said plurality of light reflectors (115) is a first plurality of light-reflecting grooves (1153), said first plurality of light-reflecting grooves (1153) being arranged at said first surface (111) and being concavely provided towards the interior of said light extraction panel (11), said first reflecting slope (1151) being a first slope wall (11531) of said first light-reflecting grooves (1153);

wherein the minimum distance between the first inclined groove wall (11531) and the second surface (112) gradually decreases along the first light incidence direction, and/or the height of the first inclined groove wall (21) of the plurality of first light reflecting grooves gradually increases along the first light incidence direction.

5. A simulated sky lighting device as claimed in claim 4, characterized in that each of said first light-reflecting grooves (1153) further comprises a first straight groove wall (11532) connected to said first sloping groove wall (11531); and/or in the direction of the first light incidence direction, the height difference of two adjacent first inclined groove walls (11531) is the same; and/or the inclination angles of a plurality of the first inclined groove walls (11531) are the same; and/or the length difference of any two adjacent first inclined groove walls (11531) is the same along the first light incidence direction.

6. A simulated sky lighting device as claimed in claim 5, characterized in that an interior of said first light reflecting groove (1153) accommodates a light transmitting medium, wherein a refractive index of said light exit plate (11) is larger than a refractive index of said light transmitting medium; and/or the inner surface of the first light reflecting groove (1153) is provided with a light reflecting coating.

7. A simulated sky lighting device as claimed in claim 1, characterized in that a plurality of said reflectors (115) are arranged in an array, and that the smallest distance of said plurality of reflectors (115) arranged in a direction perpendicular to said first incoming light direction from said second surface (112) is the same.

8. A simulated sky lighting device as claimed in claim 5, further comprising a light concentrating structure (30) arranged on said second surface (112), said light concentrating structure (30) being adapted to concentrate outgoing light rays of said second surface (112), wherein said light concentrating structure (30) is a plurality of curved protrusions (31) arranged on said second surface (112) and protruding outwards, or wherein said light concentrating structure (30) is a plurality of Fresnel lens structures arranged on said second surface (112); or the light-gathering structure (30) is a rotationally symmetric structure.

9. A simulated sky lighting device as claimed in claim 8, characterized in that said second side portion (114) has a second light source mounting portion (1141), said reflector (115) further comprises a plurality of second light reflecting grooves (1154), said plurality of second light reflecting grooves (1154) being provided in said first surface (111), said plurality of second light reflecting grooves (1154) and said plurality of first light reflecting grooves (1153) being oppositely provided, each of said second light reflecting grooves (1154) having a second slanted groove wall (11541) and a second straight groove wall (11542) connected to each other.

10. A simulated sky lighting device as claimed in claim 9, characterized in that an angle between said first sloping slot wall (11531) and said second sloping slot wall (11541) is between 80 ° and 100 °.

11. A simulated sky lighting arrangement as claimed in claim 10, characterized in that said simulated sky lighting arrangement further comprises a light barrier (40), said light barrier (40) comprising a light blocking area (41) and a light exit area (42), said light exit area (42) being arranged in correspondence with a plurality of said light concentrating structures (30), said light blocking area (41) being adapted to prevent at least part of high-angle stray light rays from exiting said light exit area (42).

12. A simulated sky lighting device as claimed in claim 11, characterized in that said light screen (40) is located between said light extraction panel (11) and said diffuser panel (20), wherein said light screen (40) is located between said light gathering structure (30) of said light extraction panel (11) and said diffuser panel (20); and/or the shading plate (40) is positioned between the light-gathering structure (30) of the light-emitting plate (11) and the focal point of the light-gathering structure (30).