An element providing a clear sky effect and a method for producing the same

Abstract

The present application relates to a kind of elements providing clear sky effect, can be used to be attached in the light emitting surface of light source, including grating structure, the grating structure includes base, and grating component, grating component is arranged on the surface of the base, grating component includes: at least two spacers, spacer is spaced apart along the first direction, the orthogonal projection of any two spacers on base does not intersect, wherein the spacer is blue structure that can be transmitted and / or reflected;Light transmission channel, light transmission channel is formed between two spacers, wherein the end of light transmission channel close to the light source is light entrance, and the other end is light exit;Wherein, the light emitted by light source enters the light transmission channel from light entrance, part of the light entering light transmission channel is emitted from light exit, part penetrates spacer and forms blue light emission.The present application can realize clear sky effect, and without needing to reconstruct the structure of lamp, it is suitable for various different use scenarios.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lighting technology, in particular to a component for providing a clear sky effect and a preparation method thereof. BACKGROUND

[0002] The visual effect of a clear sky in a natural environment can bring people psychological comfort and tranquility. In order to simulate the visual effect of a natural clear sky, the lighting industry has designed clear sky lamps with clear sky lighting effects for use in indoor environments in enclosed spaces, aiming to alleviate the negative emotions such as restlessness and depression of people in indoor spaces.

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

[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 discount in user experience; the second type of clear sky lamp also has significant limitations in design: on the one hand, in order to avoid the problem of glare caused by exposure of the light source, the lamp usually needs to limit the observation angle, which directly affects the visual experience of the user; 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, which makes this type of lamp subject to space limitations in actual application and difficult to adapt to diverse use scenarios. SUMMARY

[0005] Therefore, the purpose of the present application is to overcome the defects or deficiencies of the prior art and provide a component for providing a clear sky effect, which can be used with a white light source to obtain white light within a certain visible angle range perpendicular to the light-emitting surface direction of the light source and a clear sky sensory blue light outside the visible angle range.

[0006] A component for providing a clear sky effect can be attached to the light-emitting surface of a light source or used as a light-emitting surface of a light source, comprising a grating structure, the grating structure comprising: a substrate, and a grating assembly arranged on the surface of the substrate, the grating assembly comprising: at least two spacers, the spacers being arranged at intervals along a first direction, and the projections of any two spacers on the substrate do not intersect, wherein the spacers are blue structures that can transmit and / or reflect light; a light-transmitting channel 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, part of the light entering the light-transmitting channel exits from the light exit port, and part of the light penetrates the spacers and forms blue light.

[0007] The element for providing a clear sky effect according to the present application is attached to the light emitting surface of a lighting lamp (i.e. a light source) to cooperate with a white light source or directly as the light emitting surface of a lighting lamp, to obtain white light within a certain visual angle range perpendicular to the light emitting surface of the light source and a clear sky sense of blue light outside the visual angle range, without modifying the structure of the lighting lamp, and is suitable for various use scenarios.

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

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

[0010] In an embodiment, the projections of the spacers on the substrate include repeatedly occurring convex structures along the second direction, the repeatedly occurring convex structures are formed by alternately reversing the convexity around an extension straight line parallel to the second direction as a central axis and in the first direction.

[0011] In an embodiment, the projections of the spacers on the substrate are any one of a wavy line, a broken line, or a random curve that do not intersect with each other.

[0012] In an embodiment, two grating assemblies, a first grating assembly and a second grating assembly, are sequentially stacked on the surface of the substrate, wherein the projections of the spacers of the first grating assembly on the substrate are first projection lines, the projections of the spacers of the second grating assembly on the substrate are second projection lines, the first projection lines and the second projection lines are straight lines, and an included angle between the first projection lines and the second projection lines is greater than 0° and less than or equal to 90°.

[0013] In an embodiment, the spacer includes a first surface close to the light source and a second surface away 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 an 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] In another aspect, the present application also provides a method for preparing a component for providing a clear sky effect, comprising the following steps:

[0016] S1: preparing a substrate;

[0017] S2: coating a light-transmissive adhesive layer on the surface of the substrate;

[0018] S3: rolling and pressing the light-transmissive adhesive layer by a mold roller with a preset raised pattern on the surface, to form light-raster grooves along a first direction at positions corresponding to the raised pattern on the light-transmissive adhesive layer;

[0019] S4: filling the light-raster grooves with blue fillers capable of transmitting and / or reflecting light, to form a light-raster assembly, thereby obtaining the component for providing a clear sky effect.

[0020] In another aspect, the present application also provides a method for preparing a component for providing a clear sky effect, comprising the following steps:

[0021] S1: preparing a substrate;

[0022] S2: coating a first light-transmissive adhesive layer on the surface of the substrate;

[0023] S3: rolling and pressing the first light-transmissive adhesive layer by a mold roller with a preset raised pattern on the surface, to form first light-raster grooves along a first direction at positions corresponding to the raised pattern on the first light-transmissive adhesive layer;

[0024] S4: filling the first light-raster grooves with blue fillers capable of transmitting and / or reflecting light, to form a first light-raster assembly;

[0025] S5: coating a second light-transmissive adhesive layer on the surface of the first light-raster assembly;

[0026] S6: rolling and pressing the second light-transmissive adhesive layer by a mold roller with a preset raised pattern on the surface, to form second light-raster grooves along a predetermined direction at positions corresponding to the raised pattern on the second light-transmissive adhesive layer;

[0027] S7: filling the second light-raster grooves with blue fillers capable of transmitting and / or reflecting light, to form a second light-raster assembly, thereby obtaining the component for providing a clear sky effect.

[0028] In the method, the normal projection of the second light-raster assembly on the surface of the substrate forms an angle with the normal projection of the first light-raster assembly on the surface of the substrate, and the angle is greater than 0° and less than or equal to 90°.

[0029] In another aspect, the present application also provides a method for preparing a component for providing a clear sky effect, comprising:

[0030] S1: forming a first grating structure, comprising the following steps:

[0031] S11: preparing a first substrate;

[0032] S12: coating a first light-transmissive adhesive layer on a surface of the first substrate;

[0033] S13: performing rolling embossing on the first light-transmissive adhesive layer by a mold roller with a preset convex pattern on a surface, to form first grating grooves arranged at intervals at positions corresponding to the convex pattern on the first light-transmissive adhesive layer;

[0034] S14: filling the first grating grooves with blue fillers capable of transmitting and / or reflecting light, to form a first grating component, thereby obtaining the first grating structure;

[0035] S2: forming a second grating structure, comprising the following steps:

[0036] S21: preparing a second substrate;

[0037] S22: coating a second light-transmissive adhesive layer on a surface of the second substrate;

[0038] S23: performing rolling embossing on the second light-transmissive adhesive layer by the same mold roller, to form second grating grooves arranged at intervals at positions corresponding to the convex pattern on the second light-transmissive adhesive layer;

[0039] S24: filling the second grating grooves with blue fillers capable of transmitting and / or reflecting light, to form a second grating component, thereby obtaining the second grating structure;

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

[0041] Wherein, a projection of the second grating structure on the substrate surface and a projection of the first grating structure on the substrate surface form an included angle, and the included angle is greater than 0° and less than or equal to 90°.

[0042] In order to better understand and implement, the present application is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 Structure schematic diagram of element embodiment 1 for providing clear sky effect of the present application;

[0044] Figure 2 Sectional view of element embodiment 1 for providing clear sky effect of the present application;

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

[0046] Figure 4 Angle diagram of the element for providing the clear sky effect of the present application according to embodiment 1 as viewed by the user;

[0047] Figure 5 Physical plan view of the element for providing the clear sky effect of the present application according to embodiment 1;

[0048] Figure 6 Physical cross-sectional view of the element for providing the clear sky effect of the present application according to embodiment 1;

[0049] Figure 7 Cross-sectional view of the element for providing the clear sky effect of the present application according to embodiment 2;

[0050] Figure 8 Cross-sectional view of the element for providing the clear sky effect of the present application according to embodiment 3;

[0051] Figure 9 Schematic diagram of the orthogonal projection of the intermediate spacers in the element for providing the clear sky effect of the present application according to embodiment 4 on the surface of the substrate;

[0052] Figure 10 Schematic diagram of the orthogonal projection of the intermediate spacers in the element for providing the clear sky effect of the present application according to embodiment 5 on the surface of the substrate;

[0053] Figure 11 Schematic diagram of the structure of the element for providing the clear sky effect of the present application according to embodiment 6 having one substrate;

[0054] Figure 12 Schematic diagram of the variation of the angle between the orthogonal projection of the intermediate spacers of the first grating assembly on the surface of the substrate and the orthogonal projection of the intermediate spacers of the second grating assembly on the surface of the substrate in the element for providing the clear sky effect of the present application according to embodiment 6;

[0055] Figure 13 Schematic diagram of the structure of the element for providing the clear sky effect of the present application according to embodiment 6 having two substrates.

[0056] Reference signs:

[0057] 10, substrate; 11, first substrate; 12, second substrate;

[0058] 20, grating assembly; 200, light-transmitting 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 base;

[0061] D1, first direction; D2, second direction. DETAILED DESCRIPTION

[0062] The existing sky lamp by printing the sky pattern on the light-emitting surface of the light source has poor realism and cannot truly simulate the dynamic light and shadow changes of natural sky; and the structure of the sky lamp using a translucent plate containing a Rayleigh scattering function to simulate the sky and sunlight effect is greatly limited and is difficult to be applied to diversified scenes.

[0063] Therefore, the application provides an element with a grating structure, which is attached and fixed to the light-emitting surface of a lighting lamp (i.e., a light source) emitting white light or directly serves as the light-emitting surface of the lighting lamp, so that white light within a certain visual angle range perpendicular to the direction of the light-emitting surface of the light source and blue light with a sky sense of more than the visual angle range are obtained, without the need to modify the structure of the lamp, and the element is suitable for different use scenes.

[0064] Further, by designing the horizontal plane projection pattern of the spacer of the grating assembly or by combining the double-layer grating assembly, the visual angle range of the sky effect can be regulated, and a 360° sky effect parallel to the direction of the light-emitting surface is realized, so that the change of the sky effect can be observed at different angles, and the manufacturing process is simple and the production cost is low.

[0065] The scheme of the application will be described in detail below in combination with the drawings.

[0066] Example 1

[0067] Figures 1-2 An embodiment of the element for providing the sky effect is shown. Here, the element for providing the sky effect is a layered structure, which can be a soft film material that can be rolled up or a hard plate material. As shown in the figure, the element for providing the sky effect of the embodiment 1 of the application includes a grating structure, which specifically includes a base 10 and a grating assembly 20 arranged on the surface of the base 10. Figures 1-2

[0068] ​The substrate 10 is square or rectangular in shape and is made of an optically transparent material, specifically any one of polyethylene terephthalate (PET), thermoplastic polyurethane (TPU), polyvinyl chloride (PVC), triacetate cellulose (TAC), polycarbonate (PC), polymethyl methacrylate (PMMA), or polycycloolefin (COP). The grating assembly 20 is shaped to fit the substrate 10. The grating assembly 20 includes at least two spacers 201 spaced apart along a first direction D1, and a light transmission channel 202 formed between two adjacent spacers 201.

[0069] Specifically, the spacer 201 is linear in shape and extends along a second direction D2, wherein the second direction D2 is perpendicular to the first direction D1. The spacers 201 are parallel to each other, and the orthogonal 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, or a blue structure that can both transmit and reflect light in other embodiments. The blue structure is made of a blue resin raw material containing 75-94.5% by mass of UV optical glue, 5-20% of inorganic nanoparticles, and 0.05-5% of blue pigment, wherein the UV optical glue is at least one of polyurethane acrylate or epoxy acrylate; the inorganic nanoparticles are at least one of aluminum oxide, silicon dioxide, and titanium dioxide; and 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 opposite to each other, wherein the first surface 201a is closer to the substrate 10, and the second surface 201b is farther away 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 along the first direction D1 is also less than 100 μm and greater than 5 μm. Within this range of width, the human eye cannot distinguish the spacers 201 spaced apart, making the viewing effect more delicate and realistic. In this embodiment, the longitudinal cross section of the spacer 201 perpendicular to the substrate 10 is rectangular in shape. The first surface width L1 of the spacer 201 is the same as the second surface width L2. The height H1 of the spacer 201 is 20 μm < H1 < 1000 μm, and preferably 50 μm < H1 < 500 μm.

[0070] The light-transmitting channel 202 is a transparent structure that allows light to pass through. It can be air or a solid structure formed by material filling the spacers 201 between adjacent elements. One end of the light-transmitting channel 202 near the light source is a light inlet 202a, and the other end is a light outlet 202b. When the 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 through the light inlet 202a and exits through the light outlet 202b. The width W1 of the light inlet 202a along the first direction D1 and the width W2 of the light outlet 202b along the first direction D1 are both less than 100μm and greater than 10μm. Thus, the user cannot distinguish the spaced-apart light-transmitting channels 202, enhancing the detail and realism of the viewing effect, while allowing sufficient light to exit directly from the light-transmitting channel 202.

[0071] like Figure 2 As 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 inlet 202a and the width W2 of the light outlet 202b are the same. The central axis of the light-transmitting channel 202 forms a first angle θ1 with its diagonal, where θ1 is the viewing angle of the light emitted by the light source (usually white light): In the direction perpendicular to the grating assembly 20, white light is mainly transmitted within the viewing angle θ1 of the light-transmitting channel 202, while white light larger than the viewing angle θ1 passes through the spacer 201 to form blue light that creates the feeling of a clear sky. Therefore, the effect of a clear sky can be observed when looking towards the light source from around it. In the direction parallel to the grating assembly 20, since the intensity of the blue light formed by 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 effect of a clear sky is not obvious. The value of θ1 is jointly determined by the width W1 of the light inlet 202a along the first direction D1, the width W2 of the light outlet 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 inlet 202a and the width W2 of the light outlet 202b are equal, the value of θ1 depends on the width W2 of the light outlet 202b along the first direction D1 (the width W1 of the light inlet along the first direction D1) and the height H1 of the spacer 201. The ratio of the height H1 of the light outlet 202b 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 blue light effect is more realistic and delicate.

[0072] In use, the element for providing the sky effect is attached to the light-emitting surface of the lighting fixture by adhesive tape or equivalent means, and the base 10 is attached to the light-emitting surface of the lighting fixture. The light emitted from the light-emitting surface of the lighting fixture enters the light-transmitting channel 202 through the light-incident port 202a, and part of the light entering the light-transmitting channel 202 exits from the light-emitting port 202b, so that the light source appears white from a position directly below the light source. Another part of the light entering the light-transmitting channel 202 penetrates the spacer 201, so that the light source appears blue from a position oblique to the direction of the light emitted by the light source, thus providing the sky effect. Thus, when the sky effect is needed, the element having the light grid assembly 20 is attached to the light-emitting surface of the light source, so that the white light within a certain visual angle range perpendicular to the light-emitting surface of the light source and the blue light outside the visual angle range can be obtained, and the lighting fixture can be used without modification of the structure of the lighting fixture, which is suitable for various scenes such as home, work, and business. When the sky effect is not needed, the element can be removed, so that the lighting fixture can be used normally. Of course, the element for providing the sky effect can also be made into the light-emitting surface of the lighting fixture, so as to become part of the light source.

[0073] Figure 3 The effect of the element for providing the sky effect attached to the light-emitting surface of the lighting fixture used in daily life is shown from different positions. Figure 3 (a) As can be seen, the sky blue effect is observed when looking at the light source from a distance. Figure 3 (b) As can be seen, the blue light gradually fades when gradually approaching the light source. Figure 3 (c) As can be seen, the color of the observed light gradually approaches white. That is, the color of the light observed by the user gradually changes with the change of the radial distance of the user from the light source.

[0074] As shown in Figure 4 the second included angle θ2 is formed between the vertical projection of the line of sight of the user and the vertical projection of the spacer 201 on the same horizontal plane. 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-emitting port 202b, θ1=arctan(Wb / H1)=[W2 / (H1*sinθ2)]. As can be seen, the visual angle θ1 of the white light of the light-transmitting channel 202 changes with the change of θ2. In other words, when the radial distance of the user from the light source is constant, the blue effect observed by the user gradually changes when the user changes the angle of view of the light source. Thus, the blue gradient effect can be provided for the user.

[0075] In the element for providing the sky effect, the base 10 can also be circular or other shapes, which are not limited herein. The base 10 can be made of a translucent or transparent white material, so as to shield the light source when attached to the light emitting surface of the lighting fixture, and make the lighting fixture more beautiful.

[0076] To prepare the element for providing the sky effect in the above embodiment 1, the application provides a preparation method, including the following steps:

[0077] S1: preparing the base 10;

[0078] Specifically, the base is made of flexible PET material, so that the element can be rolled up, facilitating transportation and large-area spreading.

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

[0080] Specifically, the light-transmitting adhesive layer 200 is made of at least one of polyurethane acrylate or epoxy acrylate UV optical transparent resin. In this embodiment, polyurethane acrylate UV optical adhesive is coated on the flexible base 10 to form the light-transmitting adhesive layer 200 after vacuum defoaming.

[0081] S3: rolling and pressing the light-transmitting adhesive layer 200 by a mold roller provided with a preset raised pattern to form light grating grooves arranged at intervals along the first direction D1;

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

[0083] S4: filling the light grating grooves with blue filling material capable of transmitting and / or reflecting to form a light grating assembly 20;

[0084] Preparation of the blue filling material: 95% of polyurethane acrylate UV optical adhesive, 2.5% of nano-aluminum oxide particles, and 2.5% of cobalt blue pigment are mixed in a high-speed mixer according to the mass ratio, and then vacuum defoaming is performed at 40℃ and a pressure of-0.08MPa for 30min to obtain the blue UV resin glue liquid to be used, wherein the vacuum defoaming conditions are: temperature 20-70℃, pressure-0.15MPa to-0.05MPa, and defoaming time 10-60min;

[0085] The blue UV resin glue liquid is filled in the grating groove in a coating manner to form a grating assembly; and after UV light curing for 6s, the element capable of providing a clear sky effect is obtained, wherein the UV light curing manner is one of a high-pressure mercury lamp or a UV-LED lamp, and the UV curing energy is 600-1800mJ / cm 2 .

[0086] Figures 5-6 The actual picture of the element capable of providing a clear sky effect prepared by the preparation method is shown in the element capable of providing a clear sky effect prepared by the preparation method, the total thickness H2 of the light-transmitting glue layer 200 is 74μm, the spacer 201 and the light-transmitting channel 202 are both rectangular in the longitudinal section perpendicular to the base 10, wherein the height H1 of the spacer 201 is 65μm, the width along the first direction D1 is 9μm, and the width along the first direction D1 of the light-transmitting channel 202 is 30μm. According to the calculation formula θ1=arctan[W1(W1+W2) / 2H1W1], the visual 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 with an angle between the user and the central axis of the light-transmitting channel 202 less than 25° (close to the light source), the white light is seen; and when the user stands at a position with an angle between the user and the central axis of the light-transmitting channel 202 greater than 25° (far from the light source), the clear sky blue effect is seen.

[0087] Examples 2-3

[0088] Figures 7-8 The specific structures of the elements capable of providing a clear sky effect of the embodiment 2-3 of the element capable of providing a clear sky effect of the application are shown respectively. As shown in Figures 7-8 the structures of the embodiment 2-3 are substantially the same as the structure of the embodiment 1, and the only difference is that the shape of the spacer 201 perpendicular to the longitudinal section of the base 10 is different. Specifically:

[0089] In the embodiment 2, the longitudinal section of the spacer 201 perpendicular to the base 10 is inverted triangular, 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 the embodiment 3, the longitudinal section of the spacer 201 perpendicular to the base 10 is inverted trapezoidal, 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.

[0091] Of course, the longitudinal section of the spacer 201 can also be a right triangle, a right trapezoid, a rhombus, etc., and the inverted triangle and inverted trapezoid structure in Embodiment 2-3 is adopted because the present application adopts the mode of rolling and embossing by using a mold roller with a convex pattern on the surface to form the grating groove, and therefore, the structure of "the second surface 201b has a large area and the first surface 201a has a small area" is beneficial to demolding after embossing.

[0092] Although the elements of Embodiments 1-3 can form a clear sky blue effect when attached to the light emitting surface of a lighting lamp, the elements of Embodiments 1-3 can only provide a 180° clear sky blue effect, i.e., the clear sky blue effect can be seen when looking at the light source in the range of 0°-90° in the first direction D1, but the clear sky effect cannot be seen when looking at the light source in the range of 0°-90° in the second direction D2.

[0093] To achieve a 360° clear sky effect, the present application is further optimized based on Embodiment 1, which will be specifically described below through Embodiments 4-5.

[0094] Example 4

[0095] Figure 9 The specific structure of the element for providing a clear sky effect in Embodiment 4 is shown. As shown in Figure 9 , the structure of Embodiment 4 is substantially the same as that of Embodiment 1, and the only difference is that the spacer 201 of Embodiment 4 has a different shape of the orthographic projection on the surface of the substrate 10 than the spacer 201 of Embodiment 1.

[0096] Specifically, the projection line 100 of the spacer 201 of Embodiment 4 on the surface of the substrate 10 forms a plurality of projection lines 100 that do not intersect each other. The projection line 100 has a wave shape, and the whole extends along the second direction D2, and includes a plurality of convex structures 100a (i.e., wave crests and troughs) formed by alternately and reversely protruding around an extension straight line l parallel to the second direction D2 as the central axis in the first direction D1. As shown in Figure 9 , the projection line 100 of each spacer 201 on the surface of the substrate 10 does not intersect each other, but the orthographic projection on the vertical plane perpendicular to the second direction D2 intersects and forms a continuous projection plane P. This is equivalent to that each spacer 201 encloses a virtual closed light emitting channel as a whole, and therefore, when looking at the light source in the range of 0°-90° in the second direction D2, the blue light can also be seen, and a 360° clear sky effect is achieved.

[0097] To improve the uniformity of light emission and the distinctness of the sky effect, in the orthographic projection of the surface of the substrate 10, there is at least one virtual straight line m extending along the second direction D2 intersecting at least one point of any wave crest in any of the projection lines 100 and any wave trough in the adjacent projection line 100. For example, in the orthographic projection of the surface of the substrate 10, there is at least one virtual straight line m extending along the second direction D2 intersecting at least one point of any wave crest in any of the projection lines 100 and any wave trough in the adjacent projection line 100. Figure 9 For example, in the orthographic projection of the surface of the substrate 10, there is at least one virtual straight line m extending along the second direction D2 intersecting at least one point of any wave crest in any of the projection lines 100 and any wave trough in the adjacent projection line 100. Figure 9 For example, in the orthographic projection of the surface of the substrate 10, there is at least one virtual straight line m extending along the second direction D2 intersecting at least one point of any wave crest in any of the projection lines 100 and any wave trough in the adjacent projection line 100. Figure 9 For example, in the orthographic projection of the surface of the substrate 10, there is at least one virtual straight line m extending along the second direction D2 intersecting at least one point of any wave crest in any of the projection lines 100 and any wave trough in the adjacent projection line 100.

[0098] For example, in the orthographic projection of the surface of the substrate 10, there is at least one virtual straight line m extending along the second direction D2 intersecting at least one point of any wave crest in any of the projection lines 100 and any wave trough in the adjacent projection line 100.

[0099] Example 5

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

[0101] The projection line 100 of the spacer 201 of Embodiment 5 on the surface of the substrate 10 is a zigzag broken line. The zigzag projection line 100 extends along the second direction D2 as a whole, and includes a plurality of convex structures 100a formed by alternately and reversely protruding around an extension straight line I parallel to the second direction D2 as a center axis in the first direction D1. As shown in Figure 10 The projection line 100 of the spacer 201 of Embodiment 5 on the surface of the substrate 10 is a zigzag broken line. The zigzag projection line 100 extends along the second direction D2 as a whole, and includes a plurality of convex structures 100a formed by alternately and reversely protruding around an extension straight line I parallel to the second direction D2 as a center axis in the first direction D1. As shown in The projection line 100 of the spacer 201 of Embodiment 5 on the surface of the substrate 10 is a zigzag broken line. The zigzag projection line 100 extends along the second direction D2 as a whole, and includes a plurality of convex structures 100a formed by alternately and reversely protruding around an extension straight line I parallel to the second direction D2 as a center axis in the first direction D1. As shown in

[0102] In addition, the projection line 100 of the spacer 201 on the surface of the substrate 10 can be an irregular curve, provided that the orthogonal projection of each spacer 201 on a vertical plane perpendicular to the second direction D2 intersects to form a continuous projection plane P. Of course, since the size of the small virtual closed light transmission channels formed by the irregular curve can vary, the 360° clear sky effect presented by the light source when viewed at the same angle can not be as obvious as in Embodiments 4-5.

[0103] Example 6

[0104] Figures 11-12 The specific structure of the element providing the clear sky effect of Embodiment 6 is shown. As 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. Figures 11-12

[0105] Specifically, the first grating assembly 21 and the second grating assembly 22 are sequentially stacked on the surface of the substrate 10. The first spacer 211 of the first grating assembly 21 is in a straight line, and its orthogonal projection on the surface of the substrate 10 is a first projection line 101. The second spacer 221 of the second grating assembly 22 is also in a straight line, and its orthogonal projection on the surface of the substrate 10 is a 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 shown, when the acute angle θ3 is adjusted to a right angle, the viewing angle θ1 will also change at any time, in other words, the viewing angle θ1 is highly related to θ3, and 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, thereby adjusting the size of the viewing angle θ1, and further adjusting the clear sky effect provided by the element. Figure 12

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

[0107] Method One:

[0108] The method is substantially the same as that for preparing the element of Embodiment 1, including steps S1-S4, to form the first grating assembly 21 on the surface of the substrate 10 by steps S1-S4. Since steps S1-S4 are the same as those of Embodiment 1, they will not be described here again.

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

[0110] ​​A layer of light-transmitting adhesive is coated on the surface of the first grating assembly 21, and then steps S3-S4 are repeated sequentially to form a second grating assembly 21 on the surface of the first grating assembly 21. After UV curing, the result is as follows: Figure 11 The structure shown is a double-layer grating assembly. During this fabrication process, θ3 is adjusted by changing the imprinting direction of the mold roller on the light-transmitting adhesive layer coated on the surface of the first grating assembly 21.

[0111] Method 2:

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

[0113] It also includes the following steps:

[0114] like Figure 13 As shown, 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; in 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 manufacturing process or during use. In this embodiment, the first grating assembly 21 and the second grating assembly 22 are set to 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 of the second grating assembly 22 and the first grating assembly 21 as needed to adjust the size of θ3. The "detachable connection" here can be achieved in various ways, such as by adhesive tape, by clamping with a clamping member, by magnetic adsorption, or by interference fit of a protrusion on one and a groove on the other, or by the adhesive force of the contact surfaces of 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. Thus, during use, the relative position between the second grating assembly 22 and the first grating assembly 21 can be adjusted to change the size of the third included angle θ3, thereby creating different clear sky gradient effects within a 360° range as needed.

[0116] Thus, a 360° clear sky effect can be achieved by stacking double-layer grating components. The manufacturing process is simple, and the clear sky effect can be adjusted as needed.

[0117] Compared with the prior art, the element for clear sky effect is used by being attached to the light emitting surface of a white light source to cooperate with the white light source, and the white light in a certain visual angle range perpendicular to the light emitting surface direction of the light source is obtained outside the visual angle range, and the blue light of the clear sky sense is obtained; further, by designing the horizontal plane projection pattern of the spacer of the grating assembly or by the combination of the double-layer grating assembly, the visual angle range of the clear sky effect can be controlled, the 360° clear sky effect in the parallel light emitting surface direction is realized, the clear sky effect can be changed at 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 merely for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application. The singular forms "a", "an" and "the" 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 "a plurality of" means two or more, unless otherwise specified. The terms "first", "second", "third", etc. are used only to distinguish, not to describe a specific order or sequence, and cannot 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 associated listed items. The above description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of the present application, the specific meanings of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.

[0119] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. An element for providing a clear sky effect, for attachment to the surface of a light source's light exit face or as a light exit face of a light source, characterized in that: comprise a grating structure, the grating structure comprising: a substrate, and two grating components, respectively: a first grating component, and a second grating component, the first grating component and the second grating component being sequentially stacked on a surface of the substrate; each of the grating components is disposed on the surface of the substrate, and the grating component comprises: at least two spacers, the spacers being spaced apart along a first direction, and the orthogonal projection of any two spacers on the substrate does not intersect, wherein the spacer is a blue structure capable of transmitting and / or reflecting; a light-transmitting channel formed between two spacers, wherein one end of the light-transmitting channel close to the light source is a light entrance port, and the other end is a light exit port; wherein the orthogonal projection of the spacer of the first grating component on the substrate is a first projection line, the orthogonal projection of the spacer of the second grating component on the substrate is a second projection line, the first projection line and the second projection line are straight lines, and an included angle between the first projection line and the second projection line is greater than 0° and less than or equal to 90°; the light emitted by the light source enters the light-transmitting channel from the light entrance port, part of the light entering the light-transmitting channel exits from the light exit port, and part of the light penetrates the spacer and forms a blue light.

2. The element for providing a clear sky effect according to claim 1, wherein: the orthogonal projection of each spacer on the surface of the substrate is a straight line parallel to each other.

3. Element for providing a clear sky effect according to claim 1 or 2, characterized in that: the spacer comprises: a first surface close to the light source; and a second surface away 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.

4. The element for providing a clear sky effect according to claim 1 or 2, wherein: the width of the light entrance 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.

5. A method of manufacturing a component providing a clear sky effect as claimed in claim 1, characterized in that: comprising the following steps: S1: preparing a substrate; S2: coating a first light-transmitting adhesive layer on the surface of the substrate; S3: rolling and embossing the first light-transmitting adhesive layer by a mold roller having a preset raised pattern on the surface to form first grating grooves spaced apart along a first direction at positions corresponding to the raised pattern of the first light-transmitting adhesive layer; S4: filling the first grating grooves with blue filling material capable of transmitting and / or reflecting to form a first grating component; S5: coating a second light-transmitting adhesive layer on the surface of the first grating component; S6: rolling and embossing the second light-transmitting adhesive layer by a mold roller having a preset raised pattern on the surface to form second grating grooves spaced apart along a predetermined direction at positions corresponding to the raised pattern of the second light-transmitting adhesive layer; S7: filling the grating grooves with blue filling material capable of transmitting and / or reflecting to form a second grating component, thereby obtaining an element for providing a clear sky effect. The second grating component forms an included angle between a projection of the second grating component on the substrate surface and a projection of the first grating component on the substrate surface, and the included angle is greater than 0° and less than or equal to 90°.

6. A method of manufacturing a component providing a clear sky effect as claimed in claim 1, characterized in that: Comprise: S1: forming a first grating structure, comprising the following steps: S11: preparing a first substrate; S12: coating a first light-transmitting adhesive layer on a surface of the first substrate; S13: performing rolling embossing on the first light-transmitting adhesive layer by using a mold roller with a preset convex pattern, so as to form first grating grooves arranged at intervals at positions corresponding to the convex pattern of the first light-transmitting adhesive layer; S14: filling the first grating grooves with blue filling material capable of transmitting and / or reflecting light, so as to form a first grating component and obtain the first grating structure; S2: forming a second grating structure, comprising the following steps: S21: preparing a second substrate; S22: coating a second light-transmitting adhesive layer on a surface of the second substrate; S23: performing rolling embossing on the second light-transmitting adhesive layer by using the same mold roller, so as to form second grating grooves arranged at intervals at positions corresponding to the convex pattern of the second light-transmitting adhesive layer; S24: filling the second grating grooves with blue filling material capable of transmitting and / or reflecting light, so as to form a second grating component and obtain the second grating structure; S3: superimposing the second grating structure on a surface of the first grating structure; The second grating structure forms an included angle between a projection of the second grating structure on the substrate surface and a 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°.

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