CN202791398U - Diffusion structure and device with light source using same - Google Patents

Abstract

The utility model provides a diffusion structure and a device with a light source using the diffusion structure. The diffusion structure includes a first surface formed with a speckle layer and a second surface formed with a grating layer, wherein the grating layer is located between a light source and the speckle layer, so that a plurality of light beams generated and outputted from the light source are outputted outward after sequentially passing through the grating layer and the speckle layer. The diffusion structure of the utility model has the advantages of high transmittance, high haze and wide light diffusion angle, and can be applied to various devices with light sources such as lighting devices, backlight modules, projection devices, etc.

Description

Diffusion structure and device with light source using the same

technical field

The utility model relates to a diffusion structure, in particular to a diffusion structure applied to a device with a light source and a device with a light source using the diffusion structure. the

Background technique

Light Emitting Diodes (Light Emitting Diode, LED) have been widely used in daily life in recent years. Because of their energy-saving benefits and advantages, all monitors, home appliances, automotive electronic components, lighting fixtures, etc. are all light-emitting diodes. the scope of application. Take household lighting fixtures that use light-emitting diodes as light sources as an example, because they have the advantages of fast warm-up time, fast response, small size, long life, power saving, shock resistance, low pollution, high reliability and suitable for mass production , so that the traditional incandescent bulbs and fluorescent lamps have gradually been replaced. the

However, compared with traditional light sources, light-emitting diodes have better directivity, so when multiple light-emitting diodes output light at the same time, users feel that multiple "points" are emitting light, which will make users Feel less comfortable. Therefore, most of the existing lighting devices using light-emitting diodes as light sources are equipped with diffusion plates, so that the light provided by all light-emitting diodes must first pass through the diffusion plate before being output to the outside; Structure, sanding, irregular particles or diffusion powder (such as titanium dioxide), so the lighting device can have the effect of full "surface" light, which is known to those of ordinary skill in the art, and will not be repeated here. the

Furthermore, the industry currently has two major requirements for the performance of the diffuser: the first is the transmittance, that is, the ability of the light provided by the LED to penetrate the diffuser, which affects the brightness that the lighting device can provide; The second is haze, that is, the ability to convert "point" luminescence into "surface" luminescence. However, in terms of the structure of the existing diffuser, the transmittance and the haze are in an inversely proportional relationship, so it is difficult to simultaneously increase the transmittance and the haze. In addition, the light diffusion angle of existing diffusers is mostly limited to within 120 degrees, and it is not easy for the structure and manufacturing process of existing diffusers to increase the light diffusion angle. Therefore, the existing diffuser still has room for improvement. the

Utility model content

The technical problem mainly solved by the utility model is to provide a diffusion structure with high transmittance, high haze and wide light diffusion angle in view of the above-mentioned deficiencies in the prior art. the

Another technical problem to be solved by the utility model is to provide a device with a light source using the above-mentioned diffusion structure in view of the above-mentioned deficiencies in the prior art. the

The technical solution adopted by the utility model to solve the technical problem is to provide a device with a light source, which includes at least one light-emitting diode unit for outputting multiple light beams and a diffusion structure, and the diffusion structure is arranged on the transmission path of these light beams On the top, there is a grating layer and a speckle layer, and the light beams are output to the outside after passing through the grating layer and the speckle layer in sequence. the

Preferably, the grating layer is located between the at least one LED unit and the speckle layer. the

Preferably, the grating layer and the speckle layer are respectively formed on the first surface and the second surface of the diffusion structure. the

Preferably, the grating layer includes a plurality of gratings, the plurality of gratings are distributed on part or all of the first surface, and any two of the gratings have the same grating parameter set or any two of the gratings have different grating parameter sets. the

Preferably, the grating parameter set includes at least one of grating depth, grating pitch (pitch), grating duty cycle (duty cycle) and grating azimuth; the light beams outputted after passing through the speckle layer jointly form A light type, and the light type is formed at least according to the grating parameter sets of the gratings and/or the distribution state of the gratings. the

Preferably, the speckle layer includes at least one functional area, and the at least one functional area does not contain any speckle; or, the speckle layer is distributed on part or all of the second surface, and the speckle layer includes at least a plurality of speckles, and the speckles are continuously distributed on the second surface or the speckles are discontinuously distributed on the second surface, wherein any two of the speckles have the same intensity or the Any two of the speckles have different intensities. the

Preferably, the grating layer is obtained through holographic lithography, electronic etching, laser beam writing, phase mask lithography, micro-molding and holographic interferometry Any one of them is formed on the diffusion structure. the

Preferably, the device with a light source is a direct lighting device. the

Preferably, the device with a light source further includes a side light source processing module and a light guide module, and at least one sawtooth structure is formed on a surface of the side light source processing module; wherein, one of the at least one sawtooth structure The included angle between the surface and a normal line perpendicular to the other surface of the side light source processing module is an angle, so that at least one light beam projected on the at least one saw-toothed structure generates total reflection on it, and accordingly Angle and travel toward a corresponding direction, and then project to the diffusion structure after passing through the other surface of the side light source processing module; the light guide module is arranged between the at least one light emitting diode unit and the side light source processing module Or the at least one light emitting diode unit is arranged between the side light source processing module and the light guide module, and the light guide module is used to make at least one of the light beams output by the at least one light emitting diode unit toward the at least one A jagged structure projects. the

Preferably, the angle is between 40° and 45°. the

Preferably, the diffusion structure further includes an image sheet, and the speckle layer is located between the grating layer and the image sheet, so that a plurality of light beams output from the light source pass through the grating layer, the speckle The layer and the image are output to the outside. the

The utility model also provides a diffusion structure, which is used to uniformly diffuse a plurality of light beams received and output them to the outside. The diffusion structure includes a first surface and a second surface, and speckles are formed on the first surface. layer; the second surface is opposite to the first surface, and the second surface is formed with a grating layer; wherein, the grating layer is arranged between a light source and the speckle layer, so that the output from the light source The multiple light beams pass through the grating layer and the speckle layer in sequence and then output to the outside. the

Preferably, the grating layer includes a plurality of gratings, the plurality of gratings are distributed on part or all of the second surface, and any two of the gratings have the same grating parameter set or any two of the gratings have different grating parameter sets. the

Preferably, the grating parameter set includes at least one of grating depth, grating pitch (pitch), grating duty cycle (duty cycle) and grating azimuth; the light beams outputted after passing through the speckle layer jointly form A light type, and the light type is formed according to at least one of the grating parameter sets of the gratings and the distribution state of the gratings. the

Preferably, the grating layer is obtained through holographic lithography, electronic etching, laser beam writing, phase mask lithography, micro-molding and holographic interferometry Any one of them is formed on the second surface. the

Preferably, the speckle layer includes at least one functional area, and the at least one functional area does not contain any speckle; or, the speckle layer is distributed on part or all of the first surface, and the speckle layer includes multiple speckles, the speckles are continuously distributed on the first surface or the speckles are discontinuously distributed on the first surface, wherein any two of the speckles have the same intensity or the speckles Any two of the speckles have different intensities. the

Preferably, the diffusion structure is a diffusion structure applied to an indoor lighting device, an outdoor lighting device, a display device, a backlight module or a projection device, or the light source includes at least one LED unit. the

Preferably, the indoor lighting device or the outdoor lighting device includes a side light source processing module and a light guide module, and at least one sawtooth structure is formed on a surface of the side light source processing module; wherein, the at least one sawtooth structure The included angle between one surface of one surface and a normal line perpendicular to the other surface of the side light source processing module is an angle, so that at least one light beam projected on the at least one saw-toothed structure generates total reflection on it, and Going in a corresponding direction according to the angle, and projecting to the diffusion structure after passing through the other surface of the side light source processing module; the light guide module is arranged between the light source and the side light source processing module or the At least one LED unit is disposed between the side light source processing module and the light guide module, and the light guide module is used to project at least one of the light beams output by the light source toward the at least one sawtooth structure. the

Preferably, the angle is between 40° and 45°. the

Preferably, the diffusion structure further includes an image sheet, and the speckle layer is located between the grating layer and the image sheet, so that a plurality of light beams output from the light source pass through the grating layer, the scattering The speckle layer and the image are output to the outside. the

The diffusion structure of the utility model can effectively improve the deficiencies of the existing diffusion structure, and greatly improve the transmittance, haze and light diffusion angle. The diffusion structure can adjust its grating layer as required to obtain the required light diffusion angle, light diffusion area, light type and light diffraction efficiency; and its speckle layer can also present different display effects through different designs. The diffusion structure of the present utility model can be applied to various devices with light sources, for example, to lighting devices, such as wall lamps, advertising lamps, lampshades, etc.; or to backlight modules, such as liquid crystal display devices, etc.; or to projection device etc. the

Description of drawings

Figure 1: It is a structural side view of the first preferred embodiment of the diffusion structure of the present invention. the

FIG. 2 is a schematic diagram of the distribution of multiple point light sources formed by a single point light source when the grating depth is D1 and the grating pitch is T1. the

FIG. 3 is a schematic diagram of the distribution of multiple point light sources formed by a single point light source when the grating depth is D2 and the grating pitch is T1. the

FIG. 4 is a schematic diagram of the distribution of multiple point light sources formed by a single point light source when the grating depth is D2 and the grating pitch is T2. the

Figure 5: It is a schematic diagram of the light pattern jointly formed by multiple beams due to orthogonal interference when passing through the grating. the

Figure 6: It is a schematic diagram of the light pattern jointly formed by multiple light beams due to light interference with an interference angle of 60 degrees when passing through the grating. the

FIG. 7 is a schematic diagram of the diffusion structure shown in FIG. 1 applied to a direct lighting device. the

FIG. 8 is a schematic diagram of a preferred embodiment in which the diffusion structure shown in FIG. 1 is applied to a side lighting device. the

FIG. 9 is a schematic diagram of another preferred embodiment in which the diffusion structure shown in FIG. 1 is applied to a side lighting device. the

Fig. 10 is a front view of the speckle layer of the second preferred embodiment of the diffusion structure of the present invention. the

Fig. 11 is a front view of the speckle layer of the third preferred embodiment of the diffusion structure of the present invention. the

Fig. 12 is a partial structural schematic diagram of the fourth preferred embodiment of the diffusion structure of the present invention. the

Detailed ways

Please refer to FIG. 1 , which is a structural side view of the first preferred embodiment of the diffusion structure of the present invention. The diffusion structure 1 includes a first surface 11 and a second surface 12 opposite to the first surface 11, and a speckle (Speckle) layer 13 is formed on the first surface 11, and a grating (Grating) layer 13 is formed on the second surface 12. ) layer 14; wherein, the grating layer 14 is located between a light source 9 and the speckle layer 13, so that a plurality of light beams L1 output from the light source 9 can be output outside after passing through the grating layer 14 and the speckle layer 13 in sequence . the

Furthermore, the grating layer 14 and the speckle layer 13 respectively include a plurality of gratings and a plurality of speckles. In this preferred embodiment, the gratings and the speckles are respectively distributed on the entire second surface 12 and the first All of the surface 11, but not limited to the above-mentioned distribution form, can also be designed by those of ordinary skill in the art according to actual application requirements, such as these gratings can only be distributed on the second surface 12 part of the surface, or these speckles may only be distributed on part of the first surface 11, and the form of grating distribution or speckle distribution may be in the form of a continuous distribution or a discontinuous distribution form. the

In addition, the grating layer 14 can be holographic microlithography (holographic microlithography) technology, electronic etching technology, laser beam writing technology, phase mask microlithography (phase mask microlithography) technology, micro-forming (micro-molding) technology and full Formed on the diffusion structure 1 like any of the holographic interferometry techniques. the

Also, in this preferred embodiment, the diffusion structure 1 is flat, and the light source 9 can be a light source formed by a plurality of light-emitting diode units (not shown in the figure), or a plurality of laser units (not shown in the figure). mark), and the light source 9 is a direct-type light source that makes the output multiple light beams L1 directly projected to the diffusion structure 1, but the above is only an embodiment, which can also be determined by those of ordinary skill in the art According to actual application requirements, any equal change design is carried out. the

Next, the creative spirit and diffusion principle of the present utility model are described. When the multiple light beams L1 output by the light source 9 are projected onto the grating layer 14, the light beams L1 will be diffracted and scattered on the gratings on the grating layer 14, so that the multiple " Each of the "point" light sources is converted into more "point" light sources, and then the light beams L1 passing through the grating layer 14 look like a star-filled visual effect as a whole, so these "point" light sources The light sources together form a "surface" light source. the

However, since the light beams L1 will generate dispersion on the gratings on the grating layer 14, the above-mentioned visual effect like a starry sky will be presented in polychromatic (like a rainbow-like colorful effect); When the final light beam is then projected onto the speckle layer 13, the speckles of the speckle layer 13 will provide a light mixing function for the dispersed light beams, so that all the light output from the speckle layer 13 becomes Evenly mixed white light. the

In particular, any grating on the grating layer 14 has its corresponding grating parameter set, which may include at least one of grating depth, grating pitch (pitch), grating duty cycle (duty cycle) and grating orientation. One, by controlling the grating parameter set of each grating to be formed on the diffusion structure 1 , an appropriate light diffusion angle, light diffusion area, light type, and light diffraction efficiency can be adjusted. the

Further, please refer to FIGS. 2-4 , which are schematic diagrams of the distribution of multiple point light sources formed by a single point light source in response to multiple gratings. Figure 2 shows the diffraction efficiency when the grating depth is D1 and the grating pitch is T1, that is, a single point light source can form -1 order, 0 order and 1 order points when the grating depth is D1 and the grating pitch is T1 Light source distribution; Figure 3 shows the diffraction efficiency when the grating depth is D2 and the grating pitch is T1. Since the grating depth D2>grating depth D1, a single point light source can be formed when the grating depth is D2 and the grating pitch is T1 -3rd order, -2nd order, -1st order, 0th order, 1st order, 2nd order and 3rd order point light source distribution; Figure 4 shows the diffraction efficiency when the grating depth is D2 and the grating pitch is T2, because the grating Pitch T2< grating pitch T1, so a single point light source can form -5 order, -4 order, -3 order, -2 order, -1 order, 0 order, 1st order, 2nd order, 3rd order, 4th order and 5th order point light source distribution. In particular, the appropriate grating depth and grating pitch can make point light sources of any order have the same brightness, and the brightness of each level can also be adjusted according to the needs. The size of the point light source drawn in the figure is only for illustration , rather than to limit the brightness of the point light sources of the present invention can only be the same or different. the

Furthermore, by controlling the grating parameter set of each grating and/or by controlling the distribution state of these gratings, the light pattern jointly formed by multiple light beams passing through the grating layer and interfering with each other can be modulated. Please refer to FIGS. 5-6 , which are schematic diagrams of light patterns jointly formed by multiple light beams due to mutual interference when passing through the grating. Figure 5 shows that multiple light beams form a square light pattern because of orthogonal interference when they pass through the grating; Figure 6 shows that multiple light beams form an X-shaped light pattern because of light interference with an interference angle of 60 degrees when they pass through the grating type. the

Therefore, those of ordinary skill in the art can design the grating layer 14 according to the actual demand specifications of the diffusion structure 1, so any two gratings on the grating layer 14 do not necessarily have the same grating parameter set or have different Raster parameter group. the

Furthermore, by controlling the roughness of the first surface 11 of the diffusion structure 1, the intensity of the speckle on the speckle layer 13 can be controlled, thereby achieving different light mixing effects, so any two speckles on the speckle layer 13 are not necessarily have the same speckle intensity or have different speckle intensities. the

According to the above description, the diffusion structure 1 of the present utility model can achieve the effects of 80% transmittance, 100% haze, and a light diffusion angle θ1 of 170 degrees, which has effectively improved the shortcomings of the existing diffusion structure 1, and is indeed a very industrial Exploitation of lighting technology. Therefore, the diffusion structure of the present invention can be applied to lighting devices, such as wall lamps, advertising lamps, lampshades, etc.; or to backlight modules, such as liquid crystal display devices, etc.; or to projection devices, etc. the

Please refer to FIG. 7 , which is a schematic diagram of the diffusion structure shown in FIG. 1 applied to a direct lighting device. The direct lighting device 2 can be an indoor lighting device or an outdoor lighting device, and includes a plurality of LED units 91 and a diffusion structure 1. Since the utility model can increase the light diffusion angle of the diffusion structure 1, if the direct lighting device 1 is applied to a street lamp device, the distance between two adjacent street lamp devices can be enlarged, thereby reducing the number of street lamp devices. the

Please refer to FIG. 8 , which is a schematic diagram of a preferred implementation manner in which the diffusion structure shown in FIG. 1 is applied to a side lighting device. The side lighting device 3 can be an indoor lighting device or an outdoor lighting device, and includes a plurality of light emitting diode units 91, a side light source processing module 31, a light guide module 32 and a diffusion structure 1; wherein, the light emitting diode units 91 It is arranged on the side edge of the side light source processing module 31 , and a plurality of sawtooth structures 311 are formed on a surface of the side light source processing module 31 , and the light guide module 32 is interposed between the light emitting diode units 91 and the side light source processing module 31 In order to make the light beams L2 output by the light emitting diode units 91 project toward the direction of the sawtooth structures 311, preferably, the light guide module 32 includes semi-cylindrical transparent environments, microstructures and optical elements. at least one. the

In particular, when the light beams L2 output by the light emitting diode units 91 are projected onto any saw-toothed structure 311 and reflected, any surface of any saw-toothed structure 311 is perpendicular to the The included angle θ2 between the normals N of the other surface of the side light source processing module 31 continues to advance in a corresponding direction. Therefore, those of ordinary skill in the art can design the included angle θ2 according to actual application requirements, so as to The traveling direction of the light beams L2 after being reflected on any one of the sawtooth structures 311 is controlled. the

In this preferred embodiment, any included angle θ2 is a specific angle, and the specific angle is between 40 degrees and 45 degrees, so that when the light beams L2 output by the LED units 91 are projected to any After being totally reflected on the sawtooth structure 311 , it can then pass through the other surface of the side light source processing module 31 , and project towards the direction of the grating layer 14 of the diffusion structure 1 . the

Please refer to FIG. 9 , which is a schematic diagram of another preferred embodiment in which the diffusion structure shown in FIG. 1 is applied to a side lighting device. The side lighting device 3' of this application embodiment is substantially similar to that described in the above application embodiment, and will not be repeated here. the

Among them, the difference between this application embodiment and the foregoing application embodiments is that these light emitting diode units 91 are arranged between the side light source processing module 31 and the light guide module 32', and the output of these light emitting diode units 91 The light beam L2 is first projected to the light guide module 32 ′, and the light guide module 32 ′ guides most of the light beams L2 to project toward the direction of the saw-toothed structures 311 . the

Please refer to FIG. 10 , which is a front view of the speckle layer of the second preferred embodiment of the diffusion structure of the present invention. The diffusion structure of this preferred embodiment is roughly similar to that described in the first preferred embodiment of the diffusion structure of the present invention, and will not be repeated here. the

Among them, the difference between this preferred embodiment and the aforementioned first preferred embodiment is that the speckle layer 13' includes a functional area 131, and the functional area 131 does not contain any speckles and has a specific shape (such as LOGO), that is, the speckles on the speckle layer 13 ′ are not distributed on the entire area of the first surface 11 . the

Because the functional area 131 does not have any speckle, it cannot provide light mixing function, so the specific shape (such as LOGO) is presented in multicolor (with a rainbow-like colorful effect), and because the area outside the specific shape (LOGO) has The light mixing function provided by speckle, so the area outside the specific shape (LOGO) is presented with uniform mixed white light. the

Of course, those skilled in the art can easily apply the enlightenment obtained in the second preferred embodiment to the above-mentioned direct lighting device or side lighting device. the

Please refer to FIG. 11 , which is a front view of the speckle layer of the third preferred embodiment of the diffusion structure of the present invention. The diffusion structure of this preferred embodiment is roughly similar to that described in the first preferred embodiment of the diffusion structure of the present invention, and will not be repeated here. the

Among them, the difference between this preferred embodiment and the aforementioned first preferred embodiment is that the speckle on the speckle layer 13" is only distributed on a part of the first surface 11, and the distribution forms a specific shape (such as LOGO) .

Because the area of the specific shape (such as LOGO) has the light mixing function provided by speckle, the specific shape (such as LOGO) is presented with uniform mixed white light, and because the area outside the specific shape (such as LOGO) does not have any Speckle cannot provide light mixing function, so the area outside the specific shape (such as LOGO) is presented in multiple colors (like a rainbow-like colorful effect). the

Of course, those skilled in the art can easily apply the inspiration obtained in the third preferred embodiment to the above-mentioned direct lighting device or side lighting device. the

It can be seen from the above second preferred embodiment and the third preferred embodiment that the diffusion structure of the present utility model can make specific areas or specific shapes presented in different ways or colors to attract people's attention, so as to achieve the effect of advertising or special the goal of. the

Please refer to FIG. 12 , which is a partial structural diagram of a fourth preferred embodiment of the diffusion structure of the present invention. The diffusion structure 1' of this preferred embodiment is substantially similar to that described in the first preferred embodiment of the diffusion structure of the present invention, and will not be repeated here. the

Among them, the difference between this preferred embodiment and the aforementioned first preferred embodiment is that the diffusion structure 1' further includes an image film 15 (such as a positive film, a color film, a slide, a projection film, etc.), which is arranged on the speckle Outside the layer 13 and on the direction in which the light beams travel, so that a plurality of light beams output from the light source are output outside after passing through the grating layer 14, the speckle layer 13 and the image sheet 15 in sequence, so that the image on the image sheet 15 can be Presentation, taking Figure 10 as an example, part of the image area (such as LOGO) appears red, while another part of the area (such as the area outside the LOGO) appears green. Therefore, this preferred embodiment can also achieve the effect of advertisement or special purpose. the

Of course, those skilled in the art can easily apply the enlightenment obtained in the fourth preferred embodiment to the above-mentioned direct lighting device or side lighting device. the

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the scope of claims of the present utility model. Therefore, all other equivalent changes or modifications that do not deviate from the spirit disclosed in the present utility model shall be included in the scope of the present utility model. the

Claims (20)

1. A device with a light source, characterized in that it comprises: at least one light emitting diode unit for outputting a plurality of light beams; and The diffusion structure is arranged on the transmission path of the light beams and has a grating layer and a speckle layer, and the light beams are output outside after passing through the grating layer and the speckle layer in sequence. 2. The device with a light source as claimed in claim 1, wherein the grating layer is located between the at least one LED unit and the speckle layer. 3. The device with a light source as claimed in claim 1, wherein the grating layer and the speckle layer are respectively formed on the first surface and the second surface of the diffusion structure. 4. The device with a light source as claimed in claim 3, wherein the grating layer comprises a plurality of gratings, the plurality of gratings are distributed on part or all of the first surface, and any two of the gratings have the same grating parameters set or any two of the rasters have different sets of raster parameters. 5. The device with a light source as claimed in claim 4, wherein the grating parameter set includes at least one of grating depth, grating pitch, grating duty cycle, and grating orientation; The output beams jointly form a light pattern, and the light pattern is formed at least according to the grating parameter sets of the gratings and/or the distribution state of the gratings. 6. The device with a light source as claimed in claim 3, wherein the speckle layer comprises at least one functional area, and the at least one functional area does not contain any speckle; or, the speckle layer is distributed in part or all of the second surface, and the speckle layer includes at least a plurality of speckles, and the speckles are continuously distributed on the second surface or the speckles are discontinuously distributed on the second surface, wherein, the Any two of the speckles have the same intensity or any two of the speckles have different intensities. 7. The device with a light source as claimed in claim 1, wherein the grating layer is obtained through holographic lithography, electronic etching, laser beam writing, phase mask lithography, micro-forming and any one of holographic interferometry techniques are formed on the diffusion structure. 8. The device with a light source according to claim 1, characterized in that it is a direct lighting device. 9. The device with a light source as claimed in claim 8, further comprising a side light source processing module and a light guide module, and at least one sawtooth structure is formed on a surface of the side light source processing module; Wherein, the The included angle between a surface on the at least one sawtooth structure and a normal line perpendicular to the other surface of the side light source processing module is an angle, so that at least one light beam projected on the at least one sawtooth structure is within it generate total reflection on the surface, and travel in a corresponding direction according to the angle, and then project to the diffusion structure after passing through the other surface of the side light source processing module; the light guide module is arranged on the at least one light emitting diode unit and the side light source processing module or the at least one light emitting diode unit is arranged between the side light source processing module and the light guide module, and the light guide module is used to make the light beams output by the at least one light emitting diode unit At least one of them projects toward the at least one saw-toothed structure. 10. The device with a light source as claimed in claim 9, wherein the angle is between 40 degrees and 45 degrees. 11. The device with a light source as claimed in claim 1, wherein the diffusion structure further comprises an image sheet, and the speckle layer is located between the grating layer and the image sheet, so that the output from the light source A plurality of light beams are output out after passing through the grating layer, the speckle layer and the image sheet in sequence. 12. A diffusion structure for uniformly diffusing received multiple light beams and outputting them outward, characterized in that the diffusion structure comprises: a first surface on which a speckle layer is formed; and a second surface, opposite to the first surface, and the second surface is formed with a grating layer; Wherein, the grating layer is arranged between a light source and the speckle layer, so that a plurality of light beams output from the light source pass through the grating layer and the speckle layer in sequence and then output to the outside. 13. The diffusion structure according to claim 12, wherein the grating layer comprises a plurality of gratings, the plurality of gratings are distributed on part or all of the second surface, and any two of the gratings have the same grating parameter set or Any two of the rasters have different sets of raster parameters. 14. The diffusion structure according to claim 13, wherein the grating parameter set includes at least one of grating depth, grating pitch, grating duty cycle, and grating orientation; The light beams jointly form a light pattern, and the light pattern is formed according to at least one of the grating parameter sets of the gratings and the distribution state of the gratings. 15. The diffusion structure as claimed in claim 12, wherein the grating layer is obtained through holographic lithography, electronic etching, laser beam writing, phase mask lithography, micro-forming and holographic lithography. Any of the interferometric techniques are formed on the second surface. the 16. The diffusion structure according to claim 12, wherein the speckle layer comprises at least one functional area, and the at least one functional area does not contain any speckle; or, the speckle layer is distributed in part or all The first surface, and the speckle layer includes a plurality of speckles, the speckles are continuously distributed on the first surface or the speckles are discontinuously distributed on the first surface, wherein, among the speckles Any two speckles have the same intensity or any two of the speckles have different intensities. 17. The diffusion structure according to claim 12, characterized in that, the diffusion structure is a diffusion structure applied to indoor lighting devices, outdoor lighting devices, display devices, backlight modules or projection devices, or the light source includes at least one light emitting diode unit. 18. The diffusion structure according to claim 17, wherein the indoor lighting device or the outdoor lighting device comprises a side light source processing module and a light guide module, and at least one sawtooth is formed on a surface of the side light source processing module Shaped structure; wherein, the included angle between a surface on the at least one sawtoothed structure and a normal line perpendicular to the other surface of the side light source processing module is an angle, so that the projection onto the at least one sawtoothed structure At least one light beam is totally reflected thereon, and travels toward a corresponding direction according to the angle, and then projects to the diffusion structure after passing through the other surface of the side light source processing module; the light guide module is disposed on Between the light source and the side light source processing module or the at least one light emitting diode unit is arranged between the side light source processing module and the light guide module, and the light guide module is used to make the light beams output by the light source At least one projects toward the at least one saw-toothed structure. 19. The diffusion structure as claimed in claim 18, wherein the angle is between 40 degrees and 45 degrees. 20. The diffusion structure according to claim 12, further comprising an image sheet, and the speckle layer is located between the grating layer and the image sheet, so that the plurality of light beams output from the light source are in accordance with After sequentially passing through the raster layer, the speckle layer and the image slice, it is output to the outside. the

Images