Element for providing clear sky effect and preparation method thereof

Abstract

The invention relates to an element for providing a clear sky effect, which can be used for being attached to the surface of a light emitting surface of a light source and comprises a grating structure, the grating structure comprises a substrate and a grating assembly, the grating assembly is arranged on the surface of the substrate, and the grating assembly comprises at least two spacers which are arranged at intervals in the first direction, the orthographic projections of any two spacers on the substrate are not intersected, and the spacers are of blue structures capable of generating transmission and / or reflection; the light-transmitting channel is formed between the two distance pieces, one end, close to the light source, of the light-transmitting channel is a light incident port, and the other end of the light-transmitting channel is a light emergent port; wherein light rays emitted by the light source enter the light-transmitting channel from the light incidence port, part of the light rays entering the light-transmitting channel are emitted out from the light emergence port, and part of the light rays penetrate through the distance piece and form blue light rays to be emitted out. The sunny effect can be achieved, the structure of the lamp does not need to be modified, and the lamp is suitable for various different use scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting, and particularly to an element for providing a clear sky effect and a preparation method thereof. Background Art

[0002] The visual effect of a clear sky in the natural environment can bring psychological comfort and calmness to people. To simulate the visual effect of a natural clear sky, the lighting industry has designed clear sky lamps with a clear sky lighting effect for application in the indoor environment of enclosed spaces, aiming to relieve negative emotions such as restlessness and depression of people in the indoor space.

[0003] Currently, clear sky lamps on the market are mainly divided into two categories: The first type of clear sky lamp realizes the clear sky visual effect by printing a clear sky pattern on the light-emitting surface; the second type of clear sky lamp uses a translucent plate with a Rayleigh scattering function, and irradiates the light-emitting panel with a light source at a certain inclination angle to simulate the effects of a clear sky and sunlight.

[0004] However, the first type of clear sky lamp has poor realism and cannot truly simulate the dynamic light and shadow changes of a natural clear sky, resulting in a significant reduction in the user experience; while the second type of clear sky lamp also has significant limitations in design: on the one hand, in order to avoid the glare problem caused by the exposure of the light source, the observation angle of the lamp usually needs to be restricted, which directly affects the user's visual experience; on the other hand, when the size of the light-emitting surface of the lamp needs to be greatly increased, the height of the lamp body also has to be greatly increased accordingly, which makes this type of lamp restricted by space in actual applications and difficult to adapt to diverse usage scenarios. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to overcome the defects or deficiencies of the prior art, and provide an element for providing a clear sky effect, which can be used in cooperation with a white light source to obtain white light within a certain visible angle range perpendicular to the light-emitting surface of the light source and blue light with a clear sky sense outside the visible angle range.

[0006] An element for providing a clear sky effect, which can be used for attaching to the surface of the light-emitting surface of a light source or serving as the light-emitting surface of the light source, includes a grating structure, and the grating structure includes: a substrate, and a grating component, the grating component is arranged on the surface of the substrate, and the grating component includes: at least two spacers, the spacers are arranged at intervals along a first direction, and the orthographic projections of any two spacers on the substrate do not intersect, wherein the spacer is a blue structure capable of transmitting and / or reflecting; a light-transmitting channel, the light-transmitting channel is formed between two spacers, wherein one end of the light-transmitting channel close to the light source is a light incident port, and the other end is a light exit port; wherein the light emitted by the light source enters the light-transmitting channel from the light incident port, and part of the light entering the light-transmitting channel is emitted from the light exit port, and part of the light penetrates the spacer and forms blue light and is emitted.

[0007] Compared with the prior art, the element for providing a clear sky effect of the present invention is attached and fixed on the light-emitting surface of a lighting fixture (i.e., a light source) to be used in cooperation with a white light source or directly serve as the light-emitting surface of the lighting fixture, obtaining white light within a certain visible angle range in the direction perpendicular to the light-emitting surface of the light source and blue light with a clear sky sensation outside the visible angle range, and without the need to modify the structure of the fixture, being applicable to various different usage scenarios.

[0008] In one embodiment, the orthographic projections of the spacers on the surface of the substrate are parallel straight lines.

[0009] In one embodiment, the spacers extend in a second direction, the orthographic projections of any two adjacent spacers on a plane perpendicular to the first direction intersect, and the orthographic projections of the spacers on a plane perpendicular to the first direction form a continuous projection plane, wherein the second direction is perpendicular to the first direction.

[0010] In one embodiment, the orthographic projection of the spacer on the substrate includes a convex structure that repeats along the second direction, and the repeating convex structure is formed by alternately and reversely protruding in the first direction around an extension straight line parallel to the second direction as the central axis.

[0011] In one embodiment, the orthographic projections of the spacers on the substrate are any one of non-intersecting wavy lines, broken lines, or irregular curves.

[0012] In one embodiment, there are two grating components, namely a first grating component and a second grating component. The first grating component and the second grating component are sequentially stacked on the surface of the substrate. Among them, the orthographic projection of the spacer of the first grating component on the substrate is a first projection line, and the orthographic projection of the spacer of the second grating component on the substrate is a second projection line. Both the first projection line and the second projection line are straight lines, and an angle is formed between the first projection line and the second projection line, and this angle is greater than 0° and less than or equal to 90°.

[0013] In one embodiment, the spacer includes a first surface close to the light source and a second surface far from the light source. The width of the first surface along the first direction is greater than 0 and less than 100 μm, and the width of the second surface along the first direction is greater than 5 μm and less than 100 μm.

[0014] In one embodiment, the width of the light incident port along the first direction and the width of the light exit port along the first direction are both greater than 10 μm and less than 100 μm.

[0015] On the other hand, the present invention also provides a method for preparing an element providing a clear sky effect, comprising the following steps:

[0016] S1: Prepare a substrate;

[0017] S2: Coat a light-transmitting glue layer on the surface of the substrate;

[0018] S3: Roll-imprint the light-transmitting glue layer with a mold roller having a preset raised pattern on its surface, and form grating grooves arranged at intervals in a first direction at positions corresponding to the raised pattern on the light-transmitting glue layer;

[0019] S4: Fill the grating grooves with a blue filler capable of transmitting and / or reflecting to form a grating assembly, thereby obtaining an element providing a clear sky effect.

[0020] On yet another aspect, the present invention further provides a method for preparing an element providing a clear sky effect, comprising the following steps:

[0021] S1: Prepare a substrate;

[0022] S2: Coat a first light-transmitting glue layer on the surface of the substrate;

[0023] S3: Roll-imprint the first light-transmitting glue layer with a mold roller having a preset raised pattern on its surface, and form first grating grooves arranged at intervals in a first direction at positions corresponding to the raised pattern on the first light-transmitting glue layer;

[0024] S4: Fill the first grating grooves with a blue filler capable of transmitting and / or reflecting to form a first grating assembly;

[0025] S5: Coat a second light-transmitting glue layer on the surface of the first grating assembly;

[0026] S6: Roll-imprint the second light-transmitting glue layer with a mold roller having a preset raised pattern on its surface, and form second grating grooves arranged at intervals in a predetermined direction at positions corresponding to the raised pattern on the second light-transmitting glue layer;

[0027] S7: Fill the grating grooves with a blue filler capable of transmitting and / or reflecting to form a second grating assembly, thereby obtaining an element providing a clear sky effect;

[0028] wherein, an included angle is formed between the orthographic projection of the second grating assembly on the surface of the substrate and the orthographic projection of the first grating assembly on the surface of the substrate, and the included angle is greater than 0° and less than or equal to 90°.

[0029] On yet another aspect, the present invention further provides a method for preparing an element providing a clear sky effect, comprising:

[0030] S1: Form the first grating structure, including the following steps:

[0031] S11: Prepare the first substrate;

[0032] S12: Coat a layer of first light-transmitting glue layer on the surface of the first substrate;

[0033] S13: Roll-imprint the first light-transmitting glue layer through a mold roller with a preset raised pattern on its surface, and form first grating grooves arranged at intervals at positions corresponding to the raised pattern on the first light-transmitting glue layer;

[0034] S14: Fill the first grating grooves with a blue filler that can undergo transmission and / or reflection to form a first grating assembly and obtain the first grating structure;

[0035] S2: Form the second grating structure, including the following steps:

[0036] S21: Prepare the second substrate;

[0037] S22: Coat a layer of second light-transmitting glue layer on the surface of the second substrate;

[0038] S23: Roll-imprint the second light-transmitting glue layer through the same mold roller, and form second grating grooves arranged at intervals at positions corresponding to the raised pattern on the second light-transmitting glue layer;

[0039] S24: Fill the second grating grooves with a blue filler that can undergo transmission and / or reflection to form a second grating assembly and obtain the second grating structure;

[0040] S3: Superpose the second grating structure on the surface of the first grating structure;

[0041] Among them, an included angle is formed between the orthographic projection of the second grating structure on the substrate surface and the orthographic projection of the first grating structure on the substrate surface, and this included angle is greater than 0° and less than or equal to 90°.

[0042] For better understanding and implementation, the present invention will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0043] Figure 1 It is a schematic structural diagram of Embodiment 1 of the element for providing a clear sky effect according to the present invention;

[0044] Figure 2 It is a sectional view of Embodiment 1 of the element for providing a clear sky effect according to the present invention;

[0045] Figure 3The effect diagram when the element providing the clear sky effect of the present invention is attached to the light emitting surface of the lighting fixture: 3(a) is the effect diagram when looking at the light source from a position far away from the light source; 3(b) is the effect when looking at the light source from a position closer to the light source than 3(a); Figure 3 (c) is the effect diagram when looking at the light source directly below the light source;

[0046] Figure 4 It is a schematic diagram of the angle when the user looks at Embodiment 1 of the element providing the clear sky effect of the present invention;

[0047] Figure 5 It is a top view of the physical object of Embodiment 1 of the element providing the clear sky effect of the present invention;

[0048] Figure 6 It is a sectional view of the physical object of Embodiment 1 of the element providing the clear sky effect of the present invention;

[0049] Figure 7 It is a sectional view of Embodiment 2 of the element providing the clear sky effect of the present invention;

[0050] Figure 8 It is a sectional view of Embodiment 3 of the element providing the clear sky effect of the present invention;

[0051] Figure 9 It is a schematic diagram of the orthographic projection of the spacer on the substrate surface in Embodiment 4 of the element providing the clear sky effect of the present invention;

[0052] Figure 10 It is a schematic diagram of the orthographic projection of the spacer on the substrate surface in Embodiment 5 of the element providing the clear sky effect of the present invention;

[0053] Figure 11 It is a schematic diagram of the structure of Embodiment 6 of the element providing the clear sky effect of the present invention with one substrate;

[0054] Figure 12 It is a schematic diagram of the change in the angle formed between the orthographic projection of the spacer of the first grating assembly on the substrate surface and the orthographic projection of the spacer of the second grating assembly on the substrate surface in Embodiment 6 of the element providing the clear sky effect of the present invention;

[0055] Figure 13 It is a schematic diagram of the structure of Embodiment 6 of the element providing the clear sky effect of the present invention with two substrates.

[0056] Reference numerals:

[0057] 10. Substrate; 11. First substrate; 12. Second substrate;

[0058] 20. Grating assembly; 200. Translucent adhesive layer; 201. Spacer; 202. Light-transmitting channel; 202a. Light incident port; 202b. Light exit port; 21. First grating assembly; 210. First spacer; 212. First light-transmitting channel; 22. Second grating assembly; 220. Second spacer; 222. Second light-transmitting channel;

[0059] 100. Projection line; 101. First projection line; 102. Second projection line;

[0060] P. Vertical plane perpendicular to the substrate;

[0061] D1. First direction; D2. Second direction. Detailed implementation mode

[0062] In the existing clear sky lamp that prints a clear sky pattern on the light-emitting surface of the light source, the sense of reality is poor and it cannot truly simulate the dynamic light and shadow changes of the natural clear sky; while the structure of the clear sky lamp that uses a translucent plate with the function of Rayleigh scattering to simulate the clear sky and sunlight effects is greatly limited and it is difficult to be applicable to diverse scenarios.

[0063] Based on this, the present invention provides an element with a grating structure. By attaching and fixing the element with the grating structure on the light-emitting surface of an illumination lamp (i.e., a light source) that emits white light or directly using it as the light-emitting surface of the illumination lamp, white light within a certain visible angle range perpendicular to the light-emitting surface of the light source and blue light with a clear sky sense greater than the visible angle range are obtained. There is no need to transform the lamp structure, and it is applicable to different usage scenarios.

[0064] Furthermore, by designing the pattern of the spacer of the grating assembly on the horizontal plane projection surface or through the combined setting of a double-layer grating assembly, the visible angle range of the clear sky effect can be regulated to achieve a 360° clear sky effect in the direction parallel to the light-emitting surface. Thus, the change of the clear sky effect can be realized when viewed from different angles, and the manufacturing process is simple and the production cost is low.

[0065] The solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0066] Example 1

[0067] Figures 1-2 The specific structure of an embodiment of the element providing a clear sky effect according to the present invention is shown. Here, the element providing a clear sky effect is a layered structure, which can be a rollable soft film material or a rigid plate material. As Figures 1-2 shown, the element capable of providing a clear sky effect in Embodiment 1 of the present invention includes a grating structure, and the grating structure specifically includes a substrate 10 and a grating assembly 20 provided on the surface of the substrate 10.

[0068] The substrate 10 is square or rectangular, and its material is an optically transparent material, specifically any one of polyethylene terephthalate (PET), thermoplastic polyurethane (TPU), polyvinyl chloride (PVC), triacetyl cellulose (TAC), polycarbonate (PC), polymethyl methacrylate (PMMA), or cyclic olefin polymer (COP), etc. The grating assembly 20 is integrally in a shape adapted to the substrate 10. The grating assembly 20 includes at least two spacers 201 spaced apart along the first direction D1, and a light-transmitting channel 202 formed between two adjacent spacers 201.

[0069] Specifically, the spacer 201 is integrally linear and extends along the second direction D2, where the second direction D2 is perpendicular to the first direction D1. The spacers 201 are parallel to each other, and the orthographic projections of any two spacers 201 on the surface of the substrate 10 do not intersect. The spacer 201 is a blue structure that can transmit or reflect light. In some other embodiments, the spacer 201 can also be a blue structure that can simultaneously transmit and reflect light. The blue structure is made of a blue resin raw material, and the blue resin raw material contains 75-94.5% by mass of a UV optical adhesive liquid, 5-20% of inorganic nanoparticles, and 0.05-5% of a blue pigment. Among them, the UV optical adhesive liquid is at least one of polyurethane acrylate or epoxy acrylate; the inorganic nanoparticles are at least one of aluminum trioxide, silicon dioxide, and titanium dioxide; the blue pigment is at least one of Prussian blue, ultramarine blue, cobalt blue, phthalocyanine blue, transparent blue 2N, transparent blue 2B, transparent blue 2R, and transparent blue NP. Each spacer 201 includes a first surface 201a and a second surface 201b arranged oppositely, where the first surface 201a is close to the substrate 10 and the second surface 201b is far from the substrate 10. The width L1 of the first surface 201a of the spacer 201 along the first direction D1 is less than 100 μm and greater than 0 μm, and the width L2 of the second surface 201b of the spacer 201 along the first direction D1 is less than 100 μm and greater than 5 μm. Within this width range, the human eye cannot distinguish the spaced-apart spacers 201, making the viewing effect more delicate and realistic. In this embodiment, the longitudinal section of the spacer 200 perpendicular to the substrate 10 is specifically rectangular. The width L1 of the first surface and the width L2 of the second surface of the spacer 201 are the same. The height H1 of the spacer 201 is 20 μm < H1 < 1000 μm, preferably 50 μm < H1 < 500 μm.

[0070] The light-transmitting channel 202 is a transparent structure that allows light to penetrate. It can be air or a solid structure formed by a material filled between two adjacent spacers 201. One end of the light-transmitting channel 202 close to the light source is the light incident port 202a, and the other end is the light exit port 202b. When an element is attached and fixed to the light-emitting surface of the light source, the light emitted by the light source enters the light-transmitting channel 202 from the light incident port 202a and exits from the light exit port 202b. The width W1 of the light incident port 202a along the first direction D1 and the width W2 of the light exit port 202b along the first direction D1 are both less than 100 μm and greater than 10 μm. In this way, the user cannot distinguish the spaced light-transmitting channels 202, enhancing the fineness and authenticity of the viewing effect, while allowing sufficient light to directly exit from the light-transmitting channel 202.

[0071] As Figure 2 shown, in this embodiment, the longitudinal section of the light-transmitting channel 202 perpendicular to the substrate 10 is rectangular, and the width W1 of the light incident port 202a is the same as the width W2 of the light exit port 202b. The central axis of the light-transmitting channel 202 forms a first included angle θ1 with its diagonal line. θ1 is the visible angle of the light (usually white light) emitted by the light source: in the direction perpendicular to the grating assembly 20, within the visible angle θ1 of the light-transmitting channel 202, mainly white light is transmitted, and the white light greater than the visible angle θ1 passes through the spacer 201 to form blue light with a clear sky sensory effect. Therefore, the changing effect of the clear sky can be observed when looking at the light source around the light source. In the direction parallel to the grating assembly 20, since the intensity of the blue light formed by the white light passing through the blue spacer 201 in this direction is much smaller than the white light transmitted through the light-transmitting channel 202, the changing effect of the clear sky is not obvious. The value of θ1 is jointly determined by the width W1 of the light incident port 202a of the light-transmitting channel 202 along the first direction D1, the width W2 of the light exit port 202b along the first direction D1, and the height H1 of the spacer 201. Specifically, θ1 = arctan[W1(W1 + W2) / 2H1W1]. When the width W1 of the light incident port 202a of the light-transmitting channel 202 is equal to the width W2 of the light exit port 202b, the value of θ1 depends on the width W2 (the width W1 of the light incident port along the first direction D1) of the light exit port 202b of the light-transmitting channel 202 and the height H1 of the spacer 201. Among them, the ratio of the light exit port 202 to the height H1 of the spacer 201 is greater than 0.1 and less than 1, preferably greater than 0.1 and less than 0.5. Within this range, the white light effect is clearer, and the clear sky blue light effect is more real and delicate.

[0072] In use, the component providing the clear sky effect described above is attached and fixed to the light-emitting surface of the lighting fixture by means of tape adhesion or an equivalent method, so that the substrate 10 is fitted to the light-emitting surface of the fixture. The light emitted from the light-emitting surface of the fixture enters the light-transmitting channel 202 through the light-incident port 202a. Part of the light entering the light-transmitting channel 202 is emitted from the light-emitting port 202b, making the light appear white when viewed from directly below the light source; another part of the light entering the light-transmitting channel 202 penetrates the spacer 201 and forms blue light for emission, making the light appear as blue light with a clear sky effect when viewed from a direction inclined to the direct light of the light source. In this way, when it is necessary to create a clear sky effect, simply attaching the component with the grating assembly 20 of the present invention to the light-emitting surface of the light source can obtain white light within a certain visible angle range perpendicular to the light-emitting surface of the light source and blue light with a clear sky sense outside this visible angle range, and there is no need to modify the structure of the lighting fixture, which is applicable to various different scenarios such as home, work, and business. When it is not necessary to create a clear sky effect, the component can be disassembled to restore the normal use state of the lighting fixture. Of course, the component providing the clear sky effect described above can also be made into the light-emitting surface of the lighting fixture to become part of the light source.

[0073] Figure 3 The effects of looking at the light source from different positions after attaching the component providing the clear sky effect described above to the light-emitting surface of a lighting fixture for daily use are shown. Figure 3 (a) As can be seen, when looking at the light source from a distance, a clear sky blue effect will be seen; Figure 3 (b) As can be seen, when gradually approaching the light source, it is observed that the blue light gradually fades; when reaching the position directly below the light source, Figure 3 (c) As can be seen, the color of the observed light gradually approaches white. That is to say, as the radial distance between the user and the light source changes, the color of the light seen by the user also gradually changes.

[0074] As Figure 4 shown, the positive projection of the user's line of sight on the horizontal plane and the positive projection of the spacer 201 on the same horizontal plane form a second included angle θ2. When the width W1 of the light-incident port 202a of the light-transmitting channel 202 is the same as the width W2 of the light-emitting port 202b, θ1 = arctan(Wb / H1) = [W2 / (H1 * sinθ2)]. It can be seen that as θ2 changes, the visible angle θ1 of the white light of the light-transmitting channel 202 also changes accordingly. In other words, when the radial distance of the user relative to the light source remains unchanged and the user changes the angle of looking at the light source with the light source as the center, the blue effect seen also gradually changes. In this way, a blue gradient effect can be provided for the user.

[0075] Among the components providing the clear sky effect described above, the substrate 10 can also be set to a circular or other shape, which is not uniquely limited here. The material of the substrate 10 can be selected as a translucent or light-transmitting white material, so that when attached to the light-emitting surface of the lighting fixture, it can shield the light source and make the fixture more beautiful.

[0076] To prepare the component providing the clear sky effect of the above Example 1, the present invention provides a preparation method, including the following steps:

[0077] S1: Prepare the substrate 10;

[0078] Specifically, the substrate is made of flexible PET material, so that the component can be curled, which is convenient for transportation and large-area spreading.

[0079] S2: Coat a light-transmitting adhesive layer 200 on the surface of the substrate 10;

[0080] Specifically, the material of the light-transmitting adhesive layer 200 is at least one of polyurethane acrylate or epoxy acrylate UV optical transparent resins. In this embodiment, polyurethane acrylate UV optical adhesive is used. The polyurethane acrylate UV optical adhesive obtained by vacuum defoaming is coated on the flexible substrate 10 to form the light-transmitting adhesive layer 200.

[0081] S3: Perform rolling imprinting on the light-transmitting adhesive layer 200 through a mold roll with a preset raised pattern on its surface to form grating grooves arranged at intervals along the first direction D1;

[0082] Specifically, after UV curing the light-transmitting adhesive layer 200 for 2 s, a plurality of identical raised structures are arranged at intervals along the circumferential direction on the surface of the mold roll, and then the mold roll is imprinted on the light-transmitting adhesive layer 200 along the second direction D2 to form grating grooves corresponding one by one to the raised structures. Among them, the depth of the grating grooves does not exceed the thickness H2 of the light-transmitting adhesive layer 200.

[0083] S4: Fill the grating grooves with a blue filler that can undergo transmission and / or reflection to form a grating assembly 20;

[0084] Prepare the blue filler: According to the mass ratio, add 95% polyurethane acrylate UV optical adhesive, 2.5% nano-aluminum trioxide particles, and 2.5% cobalt blue pigment into a high-speed mixer and mix evenly. Vacuum defoam for 30 min at 40 °C and a pressure of -0.08 MPa to obtain the blue UV resin adhesive liquid to be used. Among them, the conditions for vacuum degassing are: temperature 20 - 70 °C, pressure -0.15 MPa to -0.05 MP, and defoaming time 10 - 60 min;

[0085] The blue UV resin solution is filled into the grating grooves by coating to form a grating assembly; after UV curing for 6 s, an element capable of providing a clear sky effect is obtained. Among them, the UV curing method uses one of a high-pressure mercury lamp or a UV-LED lamp, and the UV curing energy is 600 - 1800 mJ / cm 2 .

[0086] Figures 5-6 The physical diagram of the element providing the clear sky effect prepared by the above preparation method. In the element providing the clear sky effect obtained, the total thickness H2 of the light-transmitting adhesive layer 200 is 74 μm. The longitudinal cross-sections of the spacer 201 and the light-transmitting channel 202 perpendicular to the substrate 10 are both rectangular. Among them, the height H1 of the spacer 201 is 65 μm, its width along the first direction D1 is 9 μm, and the width of the light-transmitting channel 202 along the first direction D1 is 30 μm. According to the calculation formula of θ1, θ1 = arctan[W1(W1 + W2) / 2H1W1], the viewing angle θ1 of the light-transmitting channel 200 is 25°. That is to say, in the direction perpendicular to the grating assembly 20, when the user stands at a position where the included angle with the central axis of the light-transmitting channel 202 is less than 25° (close to the light source), white light is seen; while when the user stands at a position where the included angle with the central axis of the light-transmitting channel 202 is greater than 25° (far from the light source), the clear sky blue effect is seen.

[0087] Examples 2-3

[0088] Figures 7-8 Specific structures of the elements providing the clear sky effect in Embodiments 2 - 3 of the element with the clear sky effect of the present invention are respectively shown. As Figures 7-8 shown, the structures of Embodiments 2 - 3 are substantially the same as that of Embodiment 1, and the difference is only that: the shape of the longitudinal cross-section of the spacer 201 perpendicular to the substrate 10 in Embodiments 2 - 3 is different. Specifically:

[0089] In Embodiment 2, the longitudinal cross-section of the spacer 201 perpendicular to the substrate 10 is an inverted triangle, that is, the width L2 of the second surface 201b of the spacer 201 along the first direction D1 is greater than the width L1 of the first surface 201a.

[0090] In Embodiment 3, the longitudinal cross-section of the spacer 201 perpendicular to the substrate 10 is an inverted trapezoid, that is, the width L2 of the second surface 201b of the spacer 201 along the first direction D1 is greater than the width L1 of its first surface 201a.

[0091] Of course, the longitudinal cross-section of the spacer 201 can also be in the shape of an upright triangle, an upright trapezoid, a rhombus, etc. The reason for using the inverted triangle and inverted trapezoid structures in Embodiments 2-3 is that in this application, a mold roll with a convex pattern on its surface is used for rolling imprinting to form grating grooves. Therefore, the structure with "the area of the second surface 201b is large and the area of the first surface 201a is small" is conducive to demolding after imprinting.

[0092] Although when the components of the above-mentioned Embodiments 1-3 are attached to the light-emitting surface of the lighting fixture, a clear sky blue effect can be formed. However, the components of Embodiments 1-3 can only provide a 180° clear sky blue effect, that is, the clear sky blue effect can be seen when looking at the light source within the range of the angle of plus or minus 0° to 90° along the first direction D1, while the clear sky blue effect cannot be seen when looking at the light source within the range of the angle of plus or minus 0° to 90° along the second direction D2.

[0093] To achieve a 360° clear sky effect, the present invention further optimizes the design on the basis of Embodiment 1, which will be specifically described through Embodiments 4-5 below.

[0094] Example 4

[0095] Figure 9 Shows the specific structure of the component providing the clear sky effect in Embodiment 4. As Figure 9 shown, the structure of Embodiment 4 is substantially the same as that of Embodiment 1, with the only difference being that the shape of the orthographic projection of the spacer 201 in Embodiment 4 on the surface of the substrate 10 is different from that of the spacer 201 in Embodiment 1.

[0096] Specifically, the projection lines 100 of the spacer 201 in Embodiment 4 on the surface of the substrate 10 form a plurality of non-intersecting projection lines 100. The projection lines 100 are in a wavy shape, which extends as a whole along the second direction D2 and includes a plurality of convex structures 100a (i.e., wave crests and wave troughs) formed by alternately protruding in the first direction D1 with the extension straight line l parallel to the second direction D2 as the central axis and surrounding this extension straight line l. As Figure 9 shown, the projection lines 100 of each spacer 201 on the surface of the substrate 10 do not intersect, but intersect in the orthographic projection on the vertical plane perpendicular to the second direction D2 and form a continuous projection plane P. This is equivalent to the overall enclosure of each spacer 201 to form a virtual closed light-emitting channel. Therefore, when looking at the light source within the range of the angle of plus or minus 0° to 90° along the second direction D2, blue light can also be seen, achieving a 360° clear sky effect.

[0097] To improve the light extraction uniformity and the significance of the clear sky effect, in the orthographic projection of the spacer 201 on the surface of the substrate 10, there is at least one virtual straight line m extending along the second direction D2 that intersects at least one point with any wave crest in any projection line 100 and any wave trough in an adjacent projection line 100. Taking Figure 9 as an example, the tangents at the highest points of each wave trough in the topmost projection line 100 are collinear, forming a first tangent; and the tangents at the highest points of each wave crest in the second row of projection lines 100 from top to bottom are also collinear, forming a second tangent, and the second tangent further coincides with the first tangent, forming a virtual straight line m extending along the second direction D2. In other words, in the Figure 9 illustrated embodiment, there is at least one virtual straight line m extending along the second direction D2 that intersects at one point with each wave crest or wave trough of the projection lines 100 of adjacent two spacers 201. It is equivalent that the virtual straight line m encloses small virtual closed light-emitting channels with each wave crest or wave trough on the adjacent projection lines 100. In this way, the light extraction uniformity can be better and the clear sky effect is more significant. Figure 9 Of course, on the basis of the above-described elements providing the clear sky effect, adjacent two spacers 201 can be set to be closer, and the two projection lines 100 are also closer. At this time, there is more than one virtual straight line m extending along the second direction D2 that intersects with any wave crest or wave trough on the two projection lines 100, and the virtual straight line m intersects with any wave crest or wave trough on the adjacent projection lines 100 at more than one point.

[0098]

[0099] Example 5

[0100] Figure 10 Figure 10 shows the specific structure of the element providing the clear sky effect in Embodiment 5. As Figure 10 shown, the structure of Embodiment 5 is substantially the same as that of Embodiment 4, and the difference is only that: the orthographic projection shape of the spacer 201 in Embodiment 5 on the surface of the substrate 10 is different from that of the spacer 201 in Embodiment 4.

[0101] The projection line 100 of the spacer 201 in Embodiment 5 on the surface of the substrate 10 is a zigzag broken line. The zigzag projection line 100 extends as a whole along the second direction D2, and it includes a plurality of convex structures 100a formed by alternately protruding in the first direction D1 around an extension straight line l parallel to the second direction D2 as the central axis. As Figure 10 shown, the projection lines 100 of each spacer 201 on the surface of the substrate 10 do not intersect, but intersect in the orthographic projection on the vertical plane perpendicular to the second direction D2 and form a continuous projection plane P. Since the principle of the 360° clear sky effect achieved in Embodiment 5 is the same as that of Embodiment 4, it will not be elaborated here.

[0102] In addition, the projection line 100 of the spacer 201 on the surface of the substrate 10 may be an irregular curve in addition to being a wavy line or a zigzag broken line with a periodic regular change, as long as it is ensured that the orthographic projections of the spacers 201 on the vertical plane perpendicular to the second direction D2 intersect to form a continuous projection plane P. Of course, since the sizes of the small virtual closed light-transmitting channels formed by the irregular curves may vary, when observing the light source at the same angle, the 360° clear sky effect presented may not be as obvious as that in Embodiment 4-5.

[0103] Example 6

[0104] Figures 11-12 The specific structure of the element providing the clear sky effect in Embodiment 6 is shown. As Figures 11-12 shown, the structure of Embodiment 6 is substantially the same as that of Embodiment 1, with the only difference being that Embodiment 6 includes two sets of grating assemblies 20, namely a first grating assembly 21 and a second grating assembly 22.

[0105] Specifically, the first grating assembly 21 and the second grating assembly 22 are stacked on the surface of the substrate 10 in sequence. Among them, the first spacer 211 of the first grating assembly 21 is linear, and its orthographic projection on the surface of the substrate 10 is the first projection line 101. The second spacer 221 of the second grating assembly 22 is also linear, and its orthographic projection on the surface of the substrate 10 is the second projection line 102. A third included angle θ3 is formed between the first projection line 101 and the second projection line 102, and 0° < θ3 ≤ 90°. As Figure 12 shown, when the acute angle θ3 is adjusted to a right angle, the viewing angle θ1 will also change accordingly. In other words, the viewing angle θ1 is highly correlated with θ3. Therefore, when preparing the element with the above structure, the size of θ3 can be adjusted by adjusting the relative position between the first grating assembly 21 and the second grating assembly 22, so as to adjust the size of the viewing angle θ1, and further adjust the clear sky effect provided by the element.

[0106] To prepare the element providing the clear sky effect in Embodiment 6, the present invention provides the following two preparation methods:

[0107] Method 1:

[0108] It is substantially the same as the method for preparing the element in Embodiment 1, including steps S1-S4, and the first grating assembly 21 is formed on the surface of the substrate 10 through steps S1-S4; since steps S1-S4 are the same as those in Embodiment 1, they will not be elaborated here.

[0109] In addition to steps S1-S4, the following steps are also included:

[0110] A light-transmitting adhesive layer is coated on the surface of the first grating assembly 21, and then steps S3 - S4 are repeated successively to form a second grating assembly 21 on the surface of the first grating assembly 21. After UV curing, a structure with a double-layer grating assembly as shown in Figure 11 is obtained. During this preparation process, the adjustment of θ3 is achieved by adjusting the imprinting direction of the die roller on the light-transmitting adhesive layer coated on the surface of the first grating assembly 21.

[0111] Method 2:

[0112] Two completely identical grating structures are prepared through steps S1 - S4, namely the first grating structure and the second grating structure. Among them, the first grating structure includes a first substrate 11 and a first grating assembly 21 disposed on the first substrate 11, and the second grating structure includes a second substrate 12 and a second grating assembly 22 disposed on the second substrate 12;

[0113] The following steps are further included:

[0114] As shown in Figure 13 , the second grating structure is inverted and connected to the first grating structure, so that the second grating assembly 22 is in contact with the first grating assembly 21; during this process, the adjustment of θ3 is achieved by the placement position of the second grating assembly 22.

[0115] Of course, the adjustment of the relative position between the first grating assembly 21 and the second grating assembly 22 can be achieved during the production process or during use. In this embodiment, the first grating assembly 21 and the second grating assembly 22 of the element are set to be the same circle, and the second grating assembly 22 is detachably connected to the surface of the first grating assembly 21. In this way, the user can adjust the relative position between the second grating assembly 22 and the first grating assembly 21 according to needs to adjust the magnitude of θ3. Here, "detachably connected" can be achieved in various ways, such as bonding with tape, such as clamping with a clamping member, such as adsorbing with a magnetic member, or by the interference fit of a convex structure provided on one of them and a groove provided on the other, or relying on the adhesion force of the contact surface between the first grating assembly 21 and the second grating assembly 22, as long as the first grating assembly 21 and the second grating assembly 22 can be reversibly connected. In this way, during use, through the relative position between the second grating assembly 22 and the first grating assembly 21, the magnitude of the third included angle θ3 can be adjusted, so as to form different clear sky gradient effects within the range of 360° as needed.

[0116] In this way, a 360° clear sky effect can be achieved through the superposition of the double-layer grating assembly, the preparation process is simple, and the presented clear sky effect can be adjusted according to needs.

[0117] Compared with the prior art, the element provided by the present invention for achieving a clear sky effect is used in cooperation with a white light source by attaching to the light-emitting surface of the white light source, obtaining blue light with a clear sky sensory effect outside the visible angle range of white light within a certain visible angle range perpendicular to the light-emitting surface of the light source; further, by designing the pattern of the spacer of the grating assembly in the horizontal plane projection surface or by combining and setting a double-layer grating assembly, the visible angle range of the clear sky effect can be adjusted to achieve a 360° clear sky effect in the direction parallel to the light-emitting surface, so that the change of the clear sky effect can be realized when viewed from different angles, and the manufacturing process is simple and the production cost is low.

[0118] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a", "the" and "said" used in the embodiments of the present application and the claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that unless otherwise stated, "a plurality" means two or more; the terms "first", "second", "third", etc. are only used for distinction and not for describing a specific order or sequence, nor can they be understood as indicating or implying relative importance. The term "and / or" used herein means and includes any or all possible combinations of one or more of the associated listed items. When the above description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of the present application, for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0119] The above-described embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A component for providing a clear sky effect, which can be used to attach to the light-emitting surface of a light source or serve as the light-emitting surface of the light source, characterized in that: Comprising a grating structure, the grating structure comprising: a substrate, and a grating assembly, the grating assembly being disposed on the surface of the substrate, the grating assembly comprising: at least two spacers, the spacers being spaced along a first direction, and the orthographic projections of any two spacers on the substrate not intersecting, wherein the spacers are blue structures capable of transmitting and / or reflecting; a light-transmitting channel, the light-transmitting channel being formed between two spacers, wherein one end of the light-transmitting channel close to the light source is a light incident port, and the other end is a light exit port; wherein light emitted by the light source enters the light-transmitting channel from the light incident port, part of the light entering the light-transmitting channel exits from the light exit port, and part penetrates the spacer and forms blue light for emission.

2. The element for providing a clear sky effect according to claim 1, wherein: The orthographic projections of the spacers on the surface of the substrate are parallel straight lines.

3. The element for providing a clear sky effect according to claim 1, wherein: The spacers extend along a second direction, and the orthographic projections of any two adjacent spacers on a plane perpendicular to the first direction intersect, and the orthographic projections of the spacers on a plane perpendicular to the first direction form a continuous projection plane, wherein the second direction is perpendicular to the first direction.

4. The element for providing a clear sky effect according to claim 3, wherein: The orthographic projection of the spacer on the substrate includes a protruding structure that repeats along the second direction, and the repeating protruding structure is formed by alternately protruding in the first direction around an extending straight line parallel to the second direction as a central axis.

5. The element for providing a clear sky effect according to claim 1, characterized in that: Comprising: two grating assemblies, namely: a first grating assembly, and a second grating assembly, the first grating assembly and the second grating assembly are sequentially stacked on the surface of the substrate, wherein the orthographic projection of the spacer of the first grating assembly on the substrate is a first projection line, the orthographic projection of the spacer of the second grating assembly on the substrate is a second projection line, both the first projection line and the second projection line are straight lines, and an angle is formed between the first projection line and the second projection line, and the angle is greater than 0° and less than or equal to 90°.

6. The element for providing a clear sky effect according to any one of claims 1 to 5, characterized in that: The spacer includes: a first surface, the first surface being close to the light source; and a second surface, the second surface being far from the light source; The width of the first surface along the first direction is greater than 0 and less than 100 μm, and the width of the second surface along the first direction is greater than 5 μm and less than 100 μm.

7. The element for providing a clear sky effect according to any one of claims 1 to 5, wherein: The width of the light incident port along the first direction and the width of the light exit port along the first direction are both greater than 10 μm and less than 100 μm.

8. A method for preparing an element providing a clear sky effect as claimed in claim 1, characterized in that: Comprising the following steps: S1: Prepare a substrate; S2: Coat a light-transmitting adhesive layer on the surface of the substrate; S3: Roll-imprint the light-transmissive adhesive layer with a mold roll having a preset convex pattern on its surface, and form grating grooves spaced along a first direction at positions corresponding to the convex pattern on the light-transmissive adhesive layer; S4: Fill the grating grooves with a blue filler capable of transmitting and / or reflecting light to form a grating assembly, thereby obtaining an element providing a clear sky effect.

9. A method for preparing an element providing a clear sky effect as claimed in claim 5, characterized in that: comprising the following steps: S1: Prepare a substrate; S2: Coat a first light-transmissive adhesive layer on the surface of the substrate; S3: Roll-imprint the first light-transmissive adhesive layer with a mold roll having a preset convex pattern on its surface, and form first grating grooves spaced along a first direction at positions corresponding to the convex pattern on the first light-transmissive adhesive layer; S4: Fill the first grating grooves with a blue filler capable of transmitting and / or reflecting light to form a first grating assembly; S5: Coat a second light-transmissive adhesive layer on the surface of the first grating assembly; S6: Roll-imprint the second light-transmissive adhesive layer with a mold roll having a preset convex pattern on its surface, and form second grating grooves spaced along a predetermined direction at positions corresponding to the convex pattern on the second light-transmissive adhesive layer; S7: Fill the grating grooves with a blue filler capable of transmitting and / or reflecting light to form a second grating assembly, thereby obtaining an element providing a clear sky effect; wherein, an included angle is formed between the orthographic projection of the second grating assembly on the substrate surface and the orthographic projection of the first grating assembly on the substrate surface, and the included angle is greater than 0° and less than or equal to 90°.

10. A method for preparing an element providing a clear sky effect as claimed in claim 5, characterized in that: including: S1: Form a first grating structure, comprising the following steps: S11: Prepare a first substrate; S12: Coat a first light-transmissive adhesive layer on the surface of the first substrate; S13: Roll-imprint the first light-transmissive adhesive layer with a mold roll having a preset convex pattern on its surface, and form spaced first grating grooves at positions corresponding to the convex pattern; S14: Fill the first grating grooves with a blue filler capable of transmitting and / or reflecting light to form a first grating assembly, thereby obtaining a first grating structure; S2: Form a second grating structure, comprising the following steps: S21: Prepare a second substrate; S22: Coat a second light-transmissive adhesive layer on the surface of the second substrate; S23: Roll-imprint the second light-transmissive adhesive layer with the same mold roll, and form spaced second grating grooves at positions corresponding to the convex pattern; S24: Fill the second grating grooves with a blue filler capable of transmitting and / or reflecting light to form a second grating assembly, thereby obtaining a second grating structure; S3: Superpose the second grating structure on the surface of the first grating structure; wherein, an included angle is formed between the orthographic projection of the second grating structure on the substrate surface and the orthographic projection of the first grating structure on the substrate surface, and the included angle is greater than 0° and less than or equal to 90°.

Images