CN115576049A - Light guide plate, lamp assembly and simulated sky lighting device - Google Patents

Abstract

The invention provides a light guide plate, a lamp assembly and a simulated sky lighting device, wherein the light guide plate comprises: the light source module comprises a plate body, a first light source mounting part and a second light source mounting part, wherein the plate body is provided with a first surface and a second surface which are arranged oppositely, and a first side surface and a second side surface which are connected with the first surface and the second surface, and the first side surface is provided with the first light source mounting part. The first light reflecting pieces are arranged between the first surface and the second surface at intervals along the first light incidence direction, the first light reflecting pieces comprise first reflecting inclined planes facing the first light incidence direction, 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 minimum distance between the first reflecting inclined planes and the second surface is gradually reduced along the first light incidence direction. The technical scheme of this application has solved the great problem of thickness of lamps and lanterns among the correlation technique effectively.

Description

Light guide plate, lamp assembly and simulated sky lighting device

Technical Field

The invention relates to the technical field of lighting, in particular to a light guide plate, a lamp assembly and 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 light guide plate, a lamp assembly and a simulated sky lighting device, so as to solve the problem of larger thickness of a lamp in the related art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a light guide plate including: the light source mounting structure comprises a plate body, a first light source mounting part and a second light source mounting part, wherein the plate body is provided with a first surface, a second surface and a first side surface and a second side surface, the first surface and the second surface are oppositely arranged, the first side surface and the second side surface are connected with the first surface and the second surface, and the first side surface is provided with the first light source mounting part. The first light reflecting pieces are arranged between the first surface and the second surface at intervals along the first light incidence direction, the first light reflecting pieces comprise first reflecting inclined planes facing the first light incidence direction, 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 minimum distance between the first reflecting inclined planes and the second surface is gradually reduced along the first light incidence direction.

Further, the second side surface is provided with a second light source installation part, the first light reflecting piece further comprises a second reflecting inclined surface, the second reflecting inclined surface is used for guiding at least part of second light rays incident along the second light incidence direction to the first surface, wherein the minimum distance between the plurality of second reflecting inclined surfaces and the first surface is gradually reduced along the second light incidence direction, and/or the first reflecting inclined surface and the second reflecting inclined surface are positioned at two sides of the first light reflecting piece, wherein the minimum distance between the first light reflecting piece and the second surface is gradually reduced along the first light incidence direction, and the minimum distance between the first light reflecting piece and the first surface is gradually reduced along the second light incidence direction.

Furthermore, the first reflection inclined planes have a certain light transmittance, and the light transmittance of the plurality of first reflection inclined planes is gradually reduced along the first light incidence direction; and/or the first reflection inclined planes have certain reflectivity, and the reflectivity of the plurality of first reflection inclined planes is gradually increased along the first light incidence direction.

Furthermore, the plurality of first light reflecting pieces are a plurality of first light reflecting grooves which are arranged on the first surface and are recessed into the plate body, and the first reflecting inclined planes are first inclined plane groove walls of the plurality of first light reflecting grooves;

the minimum distance between the first inclined groove walls of the first light reflecting grooves and the second surface is gradually reduced along the first light incidence direction, and/or the height of the first inclined groove walls of the 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 the groove walls of two adjacent first inclined groove walls is the same along the first light incidence direction.

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

Furthermore, the light-transmitting medium is accommodated in the first light reflecting groove, and the refractive index of the plate body 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.

Further, a light-emitting microstructure is arranged on the second surface and used for condensing emergent light of the second surface, wherein the light-emitting microstructure is a plurality of arc-shaped bulges which are arranged on the second surface and protrude outwards, or the light-emitting microstructure is a plurality of Fresnel lens structures arranged on the second surface; or the light-emitting microstructure is a rotational symmetric structure.

Furthermore, a plurality of first reflecting grooves are arranged in an array manner, a plurality of light-emitting microstructures are arranged in an array manner, and each first inclined groove wall is arranged corresponding to one light-emitting microstructure, or each first inclined groove wall is arranged corresponding to a plurality of light-emitting microstructures.

Further, the included angle between the first inclined groove wall and the first straight groove wall is between 30 degrees and 60 degrees; and/or the inclination angle of the plurality of first sloped groove walls is 45 °.

Furthermore, the second side face is provided with a second light source installation portion, the light guide plate is further provided with a plurality of second light reflecting pieces, the second light reflecting pieces are arranged on the first surface, the second light reflecting pieces are a plurality of second light reflecting grooves, 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 plane groove wall and a second straight plane groove wall which are connected with each other.

Further, the included angle between the first inclined groove wall and the second inclined groove wall is between 80 degrees and 100 degrees.

Further, the light guide plate further comprises a light filtering structure, the light filtering structure is arranged around the light emergent microstructures, and/or the light filtering structure corresponds to the light emergent microstructures one to one.

According to a second aspect of the present invention, there is provided a lamp assembly, comprising a light source and the above-mentioned light guide plate.

According to a third aspect of the invention, a simulated sky lighting arrangement is provided, comprising: the direct light surface source comprises the light guide plate and a light source component positioned at the first light source installation part; and the diffusion 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 area light source into first diffused light and outwards emitting transmitted light, wherein the color temperature of the transmitted light is lower than that of the first diffused light.

By applying the technical scheme of the invention, the plate body is provided with a first surface, a second surface, a first side surface and a second side surface. The first surface and the second surface are oppositely arranged, and the first side surface and the second side surface are oppositely arranged. The first side face is provided with a first light source installation part, a plurality of first light reflecting pieces are arranged between the first surface and the second surface, and the first light reflecting pieces comprise first reflecting inclined planes. The first reflection 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 minimum distance between the plurality of first reflection inclined planes and the second surface is gradually reduced along the first light incidence direction. Through the arrangement, the light source irradiates into the plate body from the first light source installation part, the light is reflected to the second surface by the first reflection inclined planes, and meanwhile, the heights of the plurality of first reflection inclined planes are gradually increased along the first light incidence direction, so that the phenomenon that the next first reflection inclined plane is shielded by the previous first reflection inclined plane can be avoided, the whole surface of the second surface of the plate body can be fully covered with the light, the conversion from a point light source or a linear light source to a surface light source is realized, and the size and the thickness are thinner; compared with the prior art, the light source can only be pulled as far as possible to cover a larger light-emitting area. Thus, illumination can be effectively realized and the illumination effect can be ensured. And, because the light source sets up the lateral part at the plate body, can realize parallel light's shining through the effect of plate body, and then can realize simulating the illumination effect of sky better. 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 is a schematic cross-sectional view of a first embodiment of a light guide plate according to the present invention;

fig. 2 shows a schematic top view of a plate body of the light guide plate of fig. 1;

fig. 3 shows a schematic side view of the plate body of fig. 2;

FIG. 4 is a schematic view illustrating a light refraction direction of the light guide plate of FIG. 1;

FIG. 5 shows a schematic view of the light rays of FIG. 1 passing through the curved protrusions of the light guide plate;

FIG. 6 shows the ray diagram of FIG. 5;

fig. 7 illustrates a perspective structural view of a filter structure of the light guide plate of fig. 1;

FIG. 8 is a schematic top view of a second embodiment of a light guide plate according to the present invention;

FIG. 9 shows a schematic cross-sectional view of the light guide plate of FIG. 8;

fig. 10 illustrates a perspective structure view of the filter structure of the light guide plate of fig. 8.

Wherein the figures include the following reference numerals:

10. a plate body; 11. a first surface; 12. a second surface; 13. a first side surface; 14. a second side surface; 20. a first light reflecting member; 21. a first reflective slope; 22. a second reflective slope; 23. a first light reflecting groove; 231. a first sloped slot wall; 232. a first straight slot wall; 30. a light-emitting microstructure; 31. an arc-shaped bulge; 40. a second light reflecting member; 41. a second reflective groove; 411. a second sloped slot wall; 412. a second straight slot wall; 50. a light filtering structure; 60. a diffuser plate.

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 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 one 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 7, in the first embodiment, the light guide plate includes: a plate body 10 and a plurality of first reflectors 20. The plate body 10 has a first surface 11 and a second surface 12 which are oppositely arranged, and a first side surface 13 and a second side surface 14 which are connected with the first surface 11 and the second surface 12, and the first side surface 13 is provided with a first light source mounting part. The plurality of first light reflecting pieces 20 are arranged between the first surface 11 and the second surface 12 at intervals along the first light incident direction, the plurality of first light reflecting pieces 20 include first reflecting inclined surfaces 21 facing the first light incident direction, the first reflecting inclined surfaces 21 are used for guiding at least part of first light rays incident along the first light incident direction to the second surface 12, and the minimum distance between the plurality of first reflecting inclined surfaces 21 and the second surface 12 is gradually reduced along the first light incident direction.

With the solution of the present embodiment, the plate body 10 has a first surface 11, a second surface 12, a first side surface 13 and a second side surface 14. The first surface 11 and the second surface 12 are oppositely disposed, and the first side 13 and the second side 14 are oppositely disposed. The first side surface 13 has a first light source mounting portion, a plurality of first light reflecting members 20 are disposed between the first surface 11 and the second surface 12, and the first light reflecting members 20 include first reflecting slopes 21. The first reflecting inclined planes 21 are used for guiding at least part of the first light rays incident along the first light incident direction to the second surface 12, and the minimum distance between the plurality of first reflecting inclined planes 21 and the second surface 12 is gradually reduced along the first light incident direction. Through the arrangement, the light source irradiates into the plate body 10 from the first light source installation part, the light is reflected to the second surface 12 by the first reflection inclined planes 21, meanwhile, the heights of the first reflection inclined planes 21 are gradually increased along the first light incidence direction, so that the situation that the next first reflection inclined plane 21 is shielded by the previous first reflection inclined plane 21 can be avoided, the whole surface of the second surface 12 of the plate body 10 can be fully covered with the light, the conversion of a point light source or a linear light source to a surface light source is realized, and the size and the thickness are thinner; compared with the prior art, the light source can only be pulled as far as possible to cover a larger light-emitting area. Thus, illumination can be effectively realized and the illumination effect can be ensured. In addition, since the light source is disposed at a side portion of the plate body 10, the irradiation of the parallel light can be realized by the action of the plate body 10, and further, the effect of simulating the sky irradiation 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. 1 to 7, in the first embodiment, the second side surface 14 has a second light source installation portion, and the first light reflecting member 20 further includes a second reflecting inclined surface 22, where the second reflecting inclined surface 22 is used for guiding at least a part of the second light incident along the second light incident direction to the first surface 11. The minimum distance between the plurality of second reflection inclined planes 22 and the first surface 11 gradually decreases along the second light incident direction, and/or the first reflection inclined plane 21 and the second reflection inclined plane 22 are located at two sides of the first light reflecting member 20, wherein the minimum distance between the first light reflecting member 20 and the second surface 12 gradually decreases along the first light incident direction, and the minimum distance between the first light reflecting member 20 and the first surface 11 gradually decreases along the second light incident direction. The second reflecting inclined plane 22 is configured to reflect light, that is, both sides of the board body 10 can be illuminated at the same time, so that the illumination effect is better.

In other embodiments, two light sources are respectively disposed on two opposite sides of the plate body, and the light irradiated by one light source is reflected on the first surface 11 by the first reflecting slope 21, and the light irradiated by the other light source is reflected on the second surface 12 by the second reflecting slope 22.

As shown in fig. 1 to 7, in the first embodiment, the first reflective slopes 21 have a certain light transmittance, and the light transmittance of the first reflective slopes 21 gradually decreases along the first light incident direction; and/or the first reflecting inclined planes 21 have a certain reflectivity, and the reflectivity of the plurality of first reflecting inclined planes 21 is gradually increased along the first light incident direction. The arrangement can solve the problem that the first reflecting inclined plane 21 receives insufficient light, so that the light emitting effect can be improved, and the light emitting effect of the light emitting surface can be better and uniform.

As shown in fig. 1 to fig. 7, in the first embodiment, the plurality of first light reflecting members 20 are a plurality of first light reflecting grooves 23, the plurality of first light reflecting grooves 23 are disposed on the first surface 11 and are recessed toward the interior of the board body 10, and the first reflecting inclined surface 21 is a first inclined groove wall 231 of the plurality of first light reflecting grooves 23. The minimum distance between the first inclined groove walls 231 of the first light reflecting grooves 23 and the second surface 12 gradually decreases along the first light incident direction, and/or the height of the first inclined groove walls 231 of the first light reflecting grooves 23 gradually increases along the first light incident direction. The processing of the first reflection groove 23 is simpler, and the processing difficulty can be reduced.

As shown in fig. 1 to 7, in the first embodiment, each first reflective groove 23 further includes a first straight groove wall 232 connected to the first inclined groove wall 231; and/or, in the direction of the first incident light direction, the height difference between two adjacent first inclined groove walls 231 is the same; and/or the inclination angles of the plurality of first sloped slot walls 231 are the same; and/or the groove walls of two adjacent first inclined groove walls 231 have the same length difference in the first light incidence direction. The first inclined groove wall 231 and the first straight groove wall 232 in the two adjacent first light reflecting grooves 23 are spaced from each other, so that the light reflected by the first inclined groove wall 231 can be prevented from being shielded by the first straight groove wall 232, and the irradiation effect of the light can be better. The inclination angles of the first inclined groove walls 231 are the same, so that the inclination angles of the reflected light rays can be ensured to be close, and the collimation rate of the emergent light rays can be improved. The height difference between the adjacent first inclined groove walls 231 is the same, so that the reflection area of each stage is the same, that is, the quantity of the light reflected by each stage is the same, and the uniformity of the light output on the second surface 12 is ensured. When the inclination angles of the first inclined groove walls 231 are the same, the length difference of the first inclined groove walls 231 is the same, and it can also be ensured that the area difference of the first light reflecting members 20 at each stage is the same, that is, the reflection areas are the same, and the light emitting from the second surface 12 is uniform.

As shown in fig. 1 to 7, in the first embodiment, the first light reflecting members 20 are arranged in an array, and the minimum distances between the first light reflecting members 20 arranged along the direction perpendicular to the first light incident direction and the second surface 12 are the same. The above arrangement can ensure the light emitting effect of the first surface 11 to be stable.

As shown in fig. 1 to 7, in the first embodiment, the first reflective groove 23 accommodates a light-transmitting medium therein, and the refractive index of the plate body 10 is greater than that of the light-transmitting medium; the above arrangement enables better reflection of light, and specifically, in the present embodiment, the first light reflecting groove 23 contains air therein.

As shown in fig. 1 to 7, in the first embodiment, the inner surface of the first reflective groove 23 is provided with a reflective coating. The arrangement of the light reflecting coating can ensure the reflection of light.

As shown in fig. 1 to 7, in the first embodiment, the light-emitting microstructures 30 are disposed on the second surface 12, and the light-emitting microstructures 30 are used for condensing the emergent light of the second surface 12, where the light-emitting microstructures 30 are a plurality of arc-shaped protrusions 31 disposed on the second surface 12 and protruding outward, or the light-emitting microstructures 30 are a plurality of fresnel lens structures disposed on the second surface 12; or the light-emitting microstructures 30 are rotationally symmetric. The light-emitting microstructures 30 are arranged to further ensure the irradiation of light and avoid light loss. The diverging effect 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 adjacent arc-shaped protrusions 31 on the light emitting surface side of the plate body 10, and the improvement of the illumination distribution uniformity of the light emitted from the arc-shaped protrusions 31 on the rayleigh scattering plate is facilitated.

Specifically, in the present embodiment, the arc surface of the arc protrusion 31 may be a spherical surface or an aspherical surface.

Of course, each first inclined groove wall 231 corresponds to a plurality of arc-shaped protrusions 31, so that the arrangement of the arc-shaped protrusions 31 can be reduced, and the difficulty of machining can be reduced.

As shown in fig. 6, in the first embodiment, the central point of the arc-shaped protrusion 31 is assumed as point a, a generatrix arc ab or arc ac of the arc-shaped protrusion 31 can be obtained by making a section from the point a, the arc surface of the arc-shaped protrusion 31 can be obtained by performing 360-degree rotation on the generatrix (arc ab or arc ac), and the effect of the arc surface arc bc is analyzed by taking two boundary light rays bd and cf as examples. Collimated light bd, cf can take place the light deflection after arc bc, and light bd is deflected after arc bc to be light bo, and light cf is deflected after arc bc to be light co, and light ao that is located the protruding 31 center pin of arc is the same with original light ae direction through light ao after arc bc, and light bo, light ao, light co intersect at the o point. After point o, ray bo keeps going forward to oi, ray ao keeps going forward to oh, and ray co keeps going forward to 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.

As shown in fig. 1 to 7, in the first embodiment, the plurality of first light reflecting grooves 23 are arranged in an array, the plurality of light emitting microstructures 30 are arranged in an array, and each first inclined groove wall 231 is disposed corresponding to one light emitting microstructure 30, or each first inclined groove wall 231 is disposed corresponding to a plurality of light emitting microstructures 30. The above arrangement can ensure the light-emitting effect.

As shown in fig. 1 to 7, in the first embodiment, an angle between the first inclined groove wall 231 and the first straight groove wall 232 is between 30 ° and 60 °; and/or the inclination angle of the plurality of first sloped slot walls 231 is 45 °. The angle mentioned above can ensure the angle of light reflection, specifically, in the present embodiment, the angle between the first inclined groove wall 231 and the first straight groove wall 232 is 45 °.

As shown in fig. 8 to 10, in the second embodiment, the second side surface 14 has a second light source mounting portion, the light guide plate is further provided with a plurality of second light reflecting members 40, the plurality of second light reflecting members 40 are disposed on the first surface 11, the plurality of second light reflecting members 40 are a plurality of second light reflecting grooves 41, the plurality of second light reflecting grooves 41 and the plurality of first light reflecting grooves 23 are oppositely disposed, and each second light reflecting groove 41 has a second inclined groove wall 411 and a second straight groove wall 412 that are connected to each other. The above arrangement enables illumination of both side portions. Thus, the refraction effect of the light guide plate can be better, and the illumination effect can be ensured.

As shown in fig. 8 to 10, in the second embodiment, the included angle between the first sloped groove wall 231 and the second sloped groove wall 411 is between 80 ° and 100 °. The above arrangement can ensure the irradiation effect, and specifically, the included angle between the first inclined groove wall 231 and the second inclined groove wall 411 is 90 °.

As shown in fig. 1 to 7, in the first embodiment, the light guide plate further includes a light filtering structure 50, the light filtering structure 50 is disposed around the light-emitting microstructures 30, and/or the light filtering structure 50 corresponds to the light-emitting microstructures 30 one to one. The arrangement of the filtering structure 50 can realize the straightening of the light, and further can ensure the irradiation effect of the light.

As shown in fig. 1 to 7, simultaneously, because emergent light has passed through the spotlight of emergent light microstructure 30, only leave few wide-angle stray light, be about to few wide-angle stray light and other emergent light distinguish as far as possible, carry out the shading to wide-angle stray light through filtering structure 50 this moment, when having promoted stray light filtration efficiency, avoided the mistake to other emergent light as far as possible to filter, promoted the light-emitting rate. In order to further promote stray light's filtration accuracy, can arrange filtering structure 50 in the focus range of light-emitting microstructure 30, arrange between the focus of light-emitting microstructure 30 promptly, this moment, because most light process light-emitting microstructure 30 back exit angle assembles near the focus, whole light beam is the state of assembling promptly, this moment, remaining partial wide-angle stray light more easily distinguishes with other light, is filtered by filtering structure 50 accuracy 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 7, in the first embodiment, the structure that the heights of the first reflective grooves 23 are gradually increased can ensure that all the first reflective grooves 23 can distribute light, so as to ensure that all the positions of the plate body 10 have light to be emitted, and thus ensure the uniformity of the illuminance at all the positions of the rayleigh scattering plate.

As shown in fig. 1 to fig. 7, in the first embodiment, in the direction of the light incident direction, the height ratio a of two adjacent first inclined groove walls 231 satisfies: a is more than 1 and less than or equal to 2. The above arrangement enables better reflection. Specifically, in the direction of the light incidence direction, the ratio of the heights of the two adjacent first inclined groove walls 231 gradually decreases. Preferably, the ratio between the height of the first inclined groove wall 231 and the height of the second first inclined groove wall 231 is 2, the ratio between the height of the second first inclined groove wall 231 and the height of the third first inclined groove wall 231 is 1.8, the ratio between the height of the third first inclined groove wall 231 and the height of the fourth first inclined groove wall 231 is 1.6, the ratio between the height of the fourth first inclined groove wall 231 and the height of the fifth first inclined groove wall 231 is 1.4, the ratio between the height of the fifth first inclined groove wall 231 and the height of the sixth first inclined groove wall 231 is 1.2, and the subsequent ratios are sequentially set.

According to a second aspect of the present application, a lamp assembly is provided, the lamp assembly of the present embodiment includes a light source and the light guide plate. The light guide plate can effectively reduce the thickness of the lamp, so that the lamp assembly with the light guide plate also has the advantages.

According to a third aspect of the application, a simulated sky lighting device is provided, comprising: the direct light surface light source comprises the light guide plate and a light source assembly positioned at the first light source installation part. And the diffusion plate 60 is positioned on the side of the second surface 12 far away from the first surface 11, and the diffusion plate 60 is used for converting the emergent light of the direct surface light source into first diffused light and emitting the transmitted light outwards, wherein the color temperature of the transmitted light is lower than that of the first diffused light. The color temperature of the transmitted light is lower than that of the first diffused light by the above setting, thereby simulating a real blue sky effect. When the light source assembly irradiates from the first light source installation part, the first light is reflected to the second surface 12 by the first reflecting part 20, specifically, the first light is reflected under the action of the first reflecting inclined surface 21, so that the second surface 12 can be fully distributed 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 the 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 guaranteed, rayleigh scattering can be realized under the action of the scattering plate 60, 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.

The light source component comprises a collimating lens and a light source, and the collimating lens is attached to the light guide plate. The arrangement enables light emitted by the light source to be linear, so that the plurality of first inclined groove walls 231 can be ensured to realize refraction of light. Of course, in the embodiment not shown in the drawings, other mechanisms may be used to achieve output of collimated light, where collimated light refers to a directional light beam with a small beam angle, and may be, for example, a beam angle of 3 ° to 5 °.

In the present embodiment, along the advancing direction of the quasi-parallel light, the light reaches the first reflective groove 23 first, and then reaches the second first reflective groove 23. The second first light-reflecting groove 23 is higher than the first light-reflecting groove 23. Therefore, a part of the quasi-parallel light from the light source module reaches the light reflecting surface of the first light reflecting groove 23 and is reflected, and the rest of the light continues to travel, and at the second first light reflecting groove 23, a part of the light is reflected by the second first light reflecting groove 23. The rest of the light rays continue to advance and are reflected by the first light reflecting grooves 23 on the advancing square in sequence.

As shown in fig. 1, the lamp assembly further includes a diffusion plate 60, the diffusion plate 60 is spaced apart from the plate body 10, the filtering structure 50 is located between the plate body 10 and the diffusion plate 60, and a distance between the filtering structure 50 and the diffusion plate 60 is greater than twice a focal length of the arc-shaped protrusion 31. The arrangement can ensure that emergent rays of adjacent light-emitting holes can mutually contact to realize light mixing.

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," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated 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 (15)

1. A light guide plate, comprising:

a plate body (10) having a first surface (11) and a second surface (12) which are arranged oppositely, and a first side surface (13) and a second side surface (14) which are connected with the first surface (11) and the second surface (12), wherein the first side surface (13) is provided with a first light source mounting part;

a plurality of first reflection of light pieces (20), set up along first income light direction interval between first surface (11) and second surface (12), it is a plurality of first reflection of light piece (20) are including the orientation first reflection inclined plane (21) of first income light direction, first reflection inclined plane (21) are used for will following at least some first light direction of first income light direction incidence second surface (12), it is a plurality of first reflection inclined plane (21) with the minimum distance of second surface (12) is followed decrease gradually in the first income light direction.

2. The light guide plate according to claim 1, wherein the second side surface (14) has a second light source mounting portion, the first light reflecting member (20) further includes a second reflecting slope (22), the second reflecting slope (22) being adapted to guide at least a part of the second light incident in the second incident light direction toward the first surface (11),

the minimum distance between the second reflection inclined plane (22) and the first surface (11) is gradually reduced along the second light incidence direction, and/or the first reflection inclined plane (21) and the second reflection inclined plane (22) are positioned at two sides of the first light reflection piece (20), wherein the minimum distance between the first light reflection piece (20) and the second surface (12) is gradually reduced along the first light incidence direction, and the minimum distance between the first surface (11) and the second light incidence direction is gradually reduced.

3. The light guide plate according to claim 1, wherein the first reflective slopes (21) have a light transmittance, and the light transmittance of the plurality of first reflective slopes (21) gradually decreases along the first light incident direction; and/or the first reflection inclined plane (21) has a certain reflectivity, and the reflectivity of the plurality of first reflection inclined planes (21) is gradually increased along the first light incidence direction.

4. The light guide plate according to claim 1, wherein the plurality of first light reflecting members (20) is a plurality of first light reflecting grooves (23), the plurality of first light reflecting grooves (23) are disposed on the first surface (11) and are recessed toward the inside of the plate body (10), and the first reflection inclined plane (21) is a first inclined plane groove wall (231) of the plurality of first light reflecting grooves (23);

the minimum distance between the first inclined groove wall (231) of the plurality of first light reflecting grooves (23) and the second surface (12) is gradually reduced along the first light incidence direction, and/or the height of the first inclined groove wall (231) of the plurality of first light reflecting grooves (23) is gradually increased along the first light incidence direction.

5. The light guide plate according to claim 4, wherein each of the first light reflecting grooves (23) further comprises a first straight groove wall (232) connected to the first inclined groove wall (231); and/or in the direction of the first light incidence direction, the height difference values of two adjacent first inclined groove walls (231) are the same; and/or the inclination angles of a plurality of the first inclined groove walls (231) are the same; and/or the length difference of the groove walls of two adjacent first inclined groove walls (231) is the same along the first light incidence direction.

6. The light guide plate according to claim 1, wherein the plurality of first light reflecting members (20) are arranged in an array, and the minimum distances between the plurality of first light reflecting members (20) arranged in a direction perpendicular to the first light incident direction and the second surface (12) are the same.

7. The light guide plate according to claim 4, wherein the first light reflecting grooves (23) contain a light transmitting medium therein, and the refractive index of the plate body (10) is greater than that of the light transmitting medium; and/or the inner surface of the first light reflecting groove (23) is provided with a light reflecting coating.

8. The light guide plate according to claim 5, wherein the second surface (12) is provided with light-emitting microstructures (30), and the light-emitting microstructures (30) are used for condensing the emergent light of the second surface (12), wherein the light-emitting microstructures (30) are a plurality of arc-shaped protrusions (31) protruding outwards and arranged on the second surface (12), or the light-emitting microstructures (30) are a plurality of Fresnel lens structures and arranged on the second surface (12); or the light-emitting microstructures (30) are in a rotational symmetry structure.

9. The light guide plate according to claim 8, wherein a plurality of the first light reflecting grooves (23) are arranged in an array, a plurality of the light emitting microstructures (30) are arranged in an array, and each of the first inclined groove walls (231) is disposed corresponding to one of the light emitting microstructures (30), or each of the first inclined groove walls (231) is disposed corresponding to a plurality of the light emitting microstructures (30).

10. The light guide plate according to claim 5, wherein the angle between the first sloped groove wall (231) and the first straight groove wall (232) is between 30 ° and 60 °; and/or the inclination angle of a plurality of said first sloped slot walls (231) is 45 °.

11. The light guide plate according to claim 4, wherein the second side surface (14) has a second light source mounting portion, the light guide plate is further provided with a plurality of second light reflecting members (40), the plurality of second light reflecting members (40) are disposed on the first surface (11), the plurality of second light reflecting members (40) are a plurality of second light reflecting grooves (41), the plurality of second light reflecting grooves (41) and the plurality of first light reflecting grooves (23) are oppositely disposed, and each of the second light reflecting grooves (41) has a second inclined groove wall (411) and a second straight groove wall (412) which are connected with each other.

12. The light guide plate according to claim 11, wherein an included angle between the first sloped groove wall (231) and the second sloped groove wall (411) is between 80 ° and 100 °.

13. The light guide plate according to claim 8, further comprising light filtering structures (50), wherein the light filtering structures (50) are arranged around the light exit microstructures (30), and/or wherein the light filtering structures (50) are in one-to-one correspondence with the light exit microstructures (30).

14. A lamp assembly comprising a light source and the light guide plate of any one of claims 1-13.

15. A simulated sky lighting apparatus, comprising:

a direct light surface light source comprising the light guide plate according to any one of claims 1 to 13 and a light source module disposed at the first light source mounting portion;

and the scattering plate (60) is positioned on the side, away from the first surface (11), of the second surface (12), and the scattering plate (60) is used for converting the emergent rays of the direct surface light source into first diffused light and emitting the transmitted light outwards, wherein the color temperature of the transmitted light is lower than that of the first diffused light.

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