CN214099050U

CN214099050U - Fluorescent structure, optical device and warning device

Info

Publication number: CN214099050U
Application number: CN202022840713.2U
Authority: CN
Inventors: 单正建
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-08-31
Anticipated expiration: 2030-11-30

Abstract

The utility model provides a fluorescence structure, optical device and warning device relates to optical element technical field. The fluorescent structure includes: a fluorescent layer including a plurality of fluorescent grooves, the plurality of fluorescent grooves penetrating the fluorescent layer in a stacking direction of the fluorescent layer; and a reflective layer disposed in a stacked relation with the fluorescent layer, the reflective layer being configured to perform a light reflection operation based on the plurality of fluorescent grooves. The utility model discloses not only can optimize fluorescence excitation effect, reinforcing warning ability can strengthen the reflection effect moreover. Especially will the utility model provides a when the fluorescence structure is used to triangle warning tablet, way awl etc. that are used for traffic warning, further improved the warning effect to driver and crew, and then further reduced the probability of secondary accident emergence. Especially when the particle weather such as fog, sand and dust is like the sky, current triangle warning tablet is extremely poor to the reflection effect of yellow light, and adopts the utility model provides a triangle warning tablet of fluorescence structure, it is not influenced to the reflection effect of yellow light.

Description

Fluorescent structure, optical device and warning device

Technical Field

The utility model relates to an optical element technical field, concretely relates to fluorescence structure, optical device and warning device.

Background

In the prior art, plastic or surface-coated fluorescent materials containing fluorescent materials are generally adopted for warning frames or warning devices (such as triangular warning frames, traffic cones and warning piles applied to automobiles), and under the irradiation of sunlight, fluorescence is excited, so that light with longer wavelength (such as red light) is used for improving the visual significance of the warning frames or warning devices, and the warning effect of the warning frames or warning devices is enhanced on the visual aspect.

However, whatever the existing fluorescent structure applied to the traffic warning field, the fluorescent structure is simply irradiated by sunlight to excite fluorescence, and the sunlight depends on climate characteristics, so that the intensity irradiated on the traffic warning fluorescent material is naturally reduced along with natural climates such as fog, haze, rain, snow, cloudy days and the like, the capability of exciting the fluorescence is naturally reduced, and the warning effect is greatly reduced; in addition, in a traffic environment, the warning usually has a specific direction, and the existing traffic fluorescence application does not optimally adjust the direction of the exciting light to be beneficial to the observation (excitation in a scattering and diffusion mode) of traffic participants as much as possible, so that the traffic safety warning function is greatly reduced after the single factor or the superposition of the single factor and the double factor, which also becomes one of the important causes of the road traffic accident and the secondary accident of today, and the standard setting of the European standard and the national standard in the field just ignores the problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses. The embodiment of the utility model provides a fluorescence structure, optical device and warning device.

In a first aspect, an embodiment of the present invention provides a fluorescent structure, including: a fluorescent layer including a plurality of fluorescent grooves, the plurality of fluorescent grooves penetrating the fluorescent layer in a stacking direction of the fluorescent layer; and a reflective layer disposed in a stacked relation with the fluorescent layer, the reflective layer being configured to perform a light reflection operation based on the plurality of fluorescent grooves.

In some embodiments, in combination with the first aspect, the phosphor layer has a phosphor area that is larger than an orthographic projection area of the phosphor layer at a plane of the reflective layer.

With reference to the first aspect, in some embodiments, a phosphor layer has a phosphor area that is larger than a corresponding planar area of the phosphor layer.

With reference to the first aspect, in some embodiments, the reflective layer includes a first sub-reflective layer stacked on the fluorescent layer and located on the first side of the fluorescent layer, the first sub-reflective layer includes a plurality of first reflective units, the plurality of first reflective units are arranged in one-to-one correspondence with the plurality of fluorescent grooves, and an orthographic projection of the plurality of first reflective units on a plane where the fluorescent layer is located covers the plurality of fluorescent grooves.

In combination with the first aspect, in some embodiments, the plurality of first reflecting units includes a plurality of microprism units.

With reference to the first aspect, in some embodiments, the plurality of first reflection units includes a plurality of micro-prisms, and the fluorescent structure further includes a supporting member located on a side of the first sub-reflection layer away from the fluorescent layer, the supporting member being configured to support the first sub-reflection layer to support the reflection cavities corresponding to the plurality of micro-prisms.

In combination with the first aspect, in some embodiments, the material of the support member comprises a luminescent material.

With reference to the first aspect, in some embodiments, the fluorescent structure further includes a first light guide layer stacked on the second side of the fluorescent layer, and the first light guide layer conforms to a first predetermined light guide condition.

With reference to the first aspect, in some embodiments, the fluorescent structure further includes a first light source located in a non-lamination direction of the first light guiding layer.

With reference to the first aspect, in some embodiments, the reflective layer includes a second sub-reflective layer disposed on the second side of the fluorescent layer and stacked with the fluorescent layer, the second sub-reflective layer being configured to enhance light reflection.

With reference to the first aspect, in some embodiments, the fluorescent structure further includes a second light guide layer, the second light guide layer is stacked between the fluorescent layer and the second sub-reflective layer, and the second light guide layer conforms to a second preset light guide condition.

In some embodiments, in combination with the first aspect, the second sub-reflective layer includes a plurality of second reflective units, and the second reflective units are microprism-like structures or prism structures.

With reference to the first aspect, in some embodiments, the fluorescent structure further includes a second light source located in a non-lamination direction of the second light guiding layer.

In a second aspect, an embodiment of the present invention provides an optical device, including: a functional layer comprising the fluorescent structure as set forth in any of the above embodiments; and the functional layer is used for sending light to the third light guide layer based on the light from the third light guide layer.

With reference to the second aspect, in some embodiments, the optical device further includes a first light direction changing layer stacked on a side of the third light guiding layer away from the functional layer; the first light direction changing layer is used for refracting light incident to the first light direction changing layer so as to reduce an included angle between the propagation direction of the light incident to the third light guide layer through the first light direction changing layer and a normal of the third light guide layer.

In combination with the second aspect, in some embodiments, the first light redirecting layer includes a plurality of light redirecting sub-layers, and refractive indices of the plurality of light redirecting sub-layers increase sequentially along a direction from the light redirecting layer to the third light guiding layer.

With reference to the second aspect, in some embodiments, the optical device further includes a second light direction changing layer stacked on a side of the third light guiding layer away from the functional layer, the second light direction changing layer including a plurality of micro-prism strip structures.

With reference to the second aspect, in some embodiments, the optical device further includes a light filtering layer disposed on a side of the third light guiding layer away from the functional layer, the light filtering layer being configured to prevent light in a predetermined wavelength range from entering the third light guiding layer.

In combination with the second aspect, in some embodiments, the optical device further includes a light blocking layer disposed on the non-lamination direction side of the third light guide layer, the light blocking layer being configured to transmit light to the third light guide layer based on the light from the third light guide layer.

In some embodiments, in combination with the second aspect, the third light guiding layer has fluorescent cells distributed therein.

In a third aspect, an embodiment of the present invention provides a warning device, including: the optical device of any of the above embodiments; and the control module is in communication connection with the optical device and is used for controlling the light emitting mode of the optical device according to the requirement information.

With reference to the third aspect, in some embodiments, the warning device further includes an information input module communicatively connected to the control module, where the information input module is configured to allow a user to input the demand information.

With reference to the third aspect, in some embodiments, the warning device further includes: a first part comprising a support structure for supporting the warning device; a second member including opposite first and second ends, the first end being rotatably connected to the first member; and a third member including opposed third and fourth ends, the third end being rotatably connected to the second end of the second member and the fourth end being removably connected to the first member.

With reference to the third aspect, in some embodiments, the warning device further includes a wake-up module communicatively connected to the control module, and the wake-up module is configured to wake up the warning device when the warning device is adjusted to the unfolded state.

With reference to the third aspect, in some embodiments, the warning device further includes a detection module communicatively connected to the control module, where the detection module is configured to detect a position of the warning device in a storage device of the storage device, so that when the warning device is separated from a preset position in the storage device, the control module controls the playing module to play the voice guidance.

In a fourth aspect, an embodiment of the present disclosure provides a warning device comprising the optical device of any one of the above embodiments, wherein the optical device is configured to send a rescue signal to a passing person and/or a vehicle in a scene needing rescue.

The embodiment of the utility model provides a fluorescence structure not only can optimize fluorescence excitation effect, strengthens warning ability, can strengthen reflection effect moreover. Especially will the embodiment of the utility model provides a when the fluorescence structure is used to triangle warning tablet, way awl etc. that are arranged in traffic warning, its fluorescence arouses effect and reflection effect and all optimizes, has further improved the warning effect to driver and crew, and then has further reduced the probability of secondary occurence of failure. It is especially noted that, in the case of particle weather such as fog and dust, the reflection effect of the existing triangle warning board to yellow light is very poor, and the triangle warning board adopting the fluorescent structure provided by the embodiment of the present invention is not affected to the reflection effect of yellow light.

Drawings

Fig. 1 is a schematic structural diagram of a fluorescent structure according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a fluorescent structure according to another embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a fluorescent structure according to another embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a fluorescent structure according to still another embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a fluorescent structure according to still another embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a fluorescent structure according to still another embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an optical device according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of an optical device according to another embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a first light direction changing layer according to an embodiment of the present invention.

Fig. 10 is a schematic structural diagram of an optical device according to another embodiment of the present invention.

Fig. 11 is a schematic structural diagram of an optical device according to still another embodiment of the present invention.

Fig. 12 is a schematic structural diagram of an optical device according to still another embodiment of the present invention.

Fig. 13 is a schematic structural diagram of an optical device according to still another embodiment of the present invention.

Fig. 14 is a schematic structural view of a warning device according to an embodiment of the present invention.

Fig. 15 is a schematic structural view of a warning device according to another embodiment of the present invention.

Fig. 16 is a schematic structural view of a triangular warning board according to an embodiment of the present invention.

Fig. 17 is an exploded view of the triangular warning sign of fig. 16.

Fig. 18 is a schematic view showing a folded state of the triangular warning sign shown in fig. 16.

Fig. 19 is a schematic view showing another view direction of the triangular warning board shown in fig. 16.

Fig. 20 is a schematic structural view of a storage box according to an embodiment of the present invention.

Detailed Description

Hereinafter, example embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the present invention and are not intended to limit the invention to the particular embodiments described herein.

Fig. 1 is a schematic structural diagram of a fluorescent structure according to an embodiment of the present invention. As shown in fig. 1, a phosphor structure 100 according to an embodiment of the present invention includes a phosphor layer 11 and a reflective layer stacked on the phosphor layer 11. Specifically, the fluorescent layer 11 includes a plurality of fluorescent grooves 111, and the plurality of fluorescent grooves 111 penetrate the fluorescent layer 11 in the stacking direction (the vertical direction in the orientation shown in fig. 1) of the fluorescent layer 11. The reflective layer comprises a first sub-reflective layer 12, the first sub-reflective layer 12 being located on a first side (lower side of the orientation as shown in fig. 1) of the fluorescent layer 11. The first sub-reflecting layer 12 includes a plurality of first reflecting units 121, and the plurality of first reflecting units 121 are disposed in one-to-one correspondence with the plurality of fluorescent grooves 111 in the fluorescent layer 11, and the plurality of first reflecting units 121 cover the plurality of fluorescent grooves 111 in an orthogonal projection of the fluorescent layer 11.

Furthermore, the embodiment of the present invention provides a fluorescent structure 100, which further includes a transparent layer 20 stacked on the surface of the fluorescent layer 11 far from the first sub-reflective layer 12, and an adhesive layer 30 and a backing paper layer 40 stacked on the surface of the first sub-reflective layer 12 far from the fluorescent layer 11. The transparent layer 20 can serve as a carrier supporting the fluorescent layer 11 and the reflective layer. The adhesive layer 30 and the backing paper layer 40 are used to bond the fluorescent layer 11 and the reflective layer to other objects.

It should be understood that the above-mentioned transparent layer 20, adhesive layer 30 and backing paper layer 40 may be eliminated.

In the embodiment of the present invention, the fluorescent layer 11 is used for performing a fluorescence reaction based on incident light, and further exciting fluorescence. The reflective layer is used for light reflection operation based on the plurality of fluorescent grooves 111. Since the circumferential groove wall of the fluorescent groove 111 is also capable of performing a fluorescent reaction based on incident light. Therefore, the fluorescent area of the fluorescent layer 11 is larger than the area of the fluorescent layer 11 in the orthographic projection of the plane in which the first sub-reflective layer 12 is located. In practical application, the fluorescence groove 111 not only can increase the area participating in fluorescence excitation by the circumferential groove wall, but also can make the excited fluorescence enter the eyes of an observer in a specific direction by the reflection of the fluorescence groove 111 and the first reflection unit 121 corresponding to the fluorescence groove 111 at a specific angle through 121, so that compared with the prior art, the fluorescence excitation effect (natural light has a large amount of scattering and diffusion) is increased by fully utilizing incident light at various angles, the reflection structure is utilized, the scattered and diffused excitation fluorescence is adjusted to the specific direction (set by the angle of the reflection structure 121), and the excitation light which has no effect on the observer originally is enhanced by the reflection structure so as to enhance the warning effect.

Preferably, the cross-sectional shape of the fluorescent groove 111 is an inverted trapezoid in a front view perspective view of the orientation as shown in fig. 1. With this arrangement, the area of the fluorescence reaction can be further increased by the circumferential groove wall of the inverted trapezoidal fluorescence groove 111.

The fluorescent layer 11 may be formed of a material rich in fluorescence, or may be formed by applying a fluorescent material to the surface of a substrate having no fluorescent function.

Compared with the existing fluorescent structure comprising a fluorescent layer and/or a reflecting layer, the embodiment of the utility model provides a fluorescent structure utilizes the fluorescent layer of non-planar setting to optimize the fluorescence excitation effect. In addition, due to the existence of the fluorescent groove 111, the incident light can directly reach the first reflection unit 121 through the fluorescent groove 111 without passing through other hierarchical structures capable of weakening the incident light, the light loss is extremely small, the incident angle can be large (in the prior art, the fluorescence generated by the light rays with such angles has little substantial effect on an observer), and in addition, the fluorescence excited by the fluorescent layer 11 can also reach the first reflection unit 121 through the fluorescent groove 111, so the fluorescence effect is enhanced. Although in the embodiment of the present invention, the number of the first reflection units 121 in the unit area is less than the number of the first reflection units 121 all laid in the unit area, but because the light loss is reduced, the 111 slot area and the scattered diffused light are utilized, therefore, the embodiment of the present invention provides a fluorescent structure, which not only can optimize the fluorescence excitation effect, enhance the warning ability, but also can enhance the reflection effect. Especially will the embodiment of the utility model provides a when the fluorescence structure is used to triangle warning tablet, way awl etc. that are arranged in traffic warning, its fluorescence arouses effect and reflection effect and all optimizes, has further improved the warning effect to driver and crew, and then has further reduced the probability of secondary occurence of failure. It is especially noted that, in the case of particle weather such as fog and dust, the reflection effect of the existing triangle warning board to yellow light is very poor, and the triangle warning board adopting the fluorescent structure provided by the embodiment of the present invention is not affected to the reflection effect of yellow light.

In an embodiment of the present invention, when the fluorescent structure mentioned in the above embodiment is applied to the triangle warning board, the fluorescent region and the reflective region of the existing triangle warning board are replaced based on the fluorescent structure. Namely, the fluorescent requirement and the reflection requirement of the triangular warning board are simultaneously met by virtue of the fluorescent structure. By the arrangement, materials can be saved, cost is saved, and the warning effect and the environment-friendly effect are better.

It should be noted that the fluorescent structure mentioned in the embodiment of the present invention is not limited to be applied to a triangle warning board, and can be applied to other articles needing warning after being attached to structures such as an adhesive layer.

In addition, in the fluorescent structure 100 shown in fig. 1, the fluorescent groove 111 may also be filled with a transparent low light loss material or a transparent plastic.

Exemplarily, the first reflection unit 121 is a microprism unit 1211. Here, the microprism unit 1211 refers to a microprism having a metal reflective film layer attached to a surface thereof.

Preferably, the angle of the microprism is smaller than a preset angle, and the reflectivity of the microprism is greater than a preset reflectivity. In the application scene of the triangular warning board, the reflection angle mainly considers the following vehicles in the same direction of the accident vehicle, so that the fluorescence excitation effect and the reflection effect can be further optimized by the arrangement, the traditional fluorescence warning only has the scattering and diffusion conditions, the reflection angle of the microprism is optimized to be in a specific direction, and the fluorescence excitation light intensity in the specific direction is enhanced.

Preferably, the fluorescent area of the fluorescent layer 11 is larger than the orthographic area of the fluorescent layer 11 in the plane of the reflective layer (e.g., the first sub-reflective layer 12). More preferably, the fluorescent area of the fluorescent layer 11 is larger than the corresponding planar area of the fluorescent layer 11. So set up, can utilize the fluorescent layer increase fluorescence area of non-planar setting, and then utilize the fluorescence area of increase to further optimize fluorescence excitation effect.

As previously mentioned, the orientation shown in FIG. 1 is a front view cross-sectional view of the phosphor structure 100. In order to clearly show the structure of the fluorescent structure 100, a schematic structural diagram of a top view angle of the fluorescent structure 100 in another embodiment of the present invention is given below with reference to fig. 2.

In the front view cross-sectional view of the orientation shown in fig. 1, the cross-sectional shape of the fluorescent groove 111 is not limited to an inverted trapezoid, and may be a semicircle or other shape as long as the actual fluorescent area can be increased. As illustrated below in connection with fig. 3.

Specifically, fig. 3 is a schematic structural diagram of a fluorescent structure according to another embodiment of the present invention. As shown in fig. 3, the embodiment shown in fig. 3 is different from the embodiment shown in fig. 1 in that, in the embodiment shown in fig. 3, the cross-sectional shape of the fluorescent groove 111 is semicircular.

Fig. 4 is a schematic structural diagram of a fluorescent structure according to still another embodiment of the present invention. The embodiment shown in fig. 4 is extended based on the embodiment shown in fig. 1, and the differences between the embodiment shown in fig. 4 and the embodiment shown in fig. 1 will be emphasized below, and the descriptions of the same parts will not be repeated.

As shown in fig. 4, the embodiment of the present invention provides a fluorescent structure 100 with the transparent layer 20, the adhesive layer 30 and the backing paper layer 40 removed. Furthermore, the fluorescent structure 100 provided by the embodiment of the present invention further includes a first light guide layer 13. The first light guide layer 13 is stacked on the second side (i.e. the upper side in the orientation shown in fig. 4) of the fluorescent layer 11, and the first light guide layer 13 conforms to the first preset light guide condition.

Illustratively, the material of the first light guide layer 13 is a transparent light guide material, so that light incident to the first light guide layer 13 can be uniformly dispersed and conducted in the first light guide layer 13, and finally a large amount of light is emitted in a direction close to a normal of a plane where the first light guide layer 13 is located, thereby achieving a purpose of improving a light effect of the fluorescent structure 100 (compared with existing scattering and diffusion).

Optionally, the first light guide layer 13 is a micro light guide plate or a nano light guide plate or a light guide film.

Exemplarily, the shape, the material and the light effect that can bring of the first light guide layer 13 mentioned in the embodiment of the present invention can all be referred to the light auxiliary layer 20 mentioned in the following embodiment, which is not described again in the embodiment of the present invention.

In the practical application process, the incident light is firstly incident to the first light guiding layer 13, so that the first light guiding layer 13 is used to convert the light source (such as a point light source) into a surface light source, then the surface light source obtained through the first light guiding layer 13 reaches the fluorescent layer 11 and the first sub-reflecting layer 12, and finally, the fluorescence excited by the fluorescent layer 11 and the light reflected by the first sub-reflecting layer 12 are finally emitted through the first light guiding layer 13.

The embodiment of the utility model provides a fluorescence structure has further improved the exciting light effect with the help of first leaded light layer, and the essence plays light and gives a set direction effect, and then has further improved the eye-catching degree of vision of fluorescence structure.

In another embodiment of the present invention, a protective film structure is stacked on the light-entering side (e.g., the upper side of the fluorescent structure in the orientation shown in fig. 4) of the fluorescent structure mentioned in the above embodiments to protect the fluorescent structure.

Another embodiment of the present invention is extended on the basis of the embodiment shown in fig. 4. In the embodiment of the present invention, the fluorescent structure 100 further includes a first light source (not shown) located in the non-lamination direction of the first light guide layer 13. The non-lamination direction is an extending direction of a plane in which the first light guide layer 13 is located.

Preferably, the first light source is disposed in contact with the first light guiding layer 13.

The number of first light source can be one, also can be a plurality of, and it can set up one side in the non-range upon range of orientation of first leaded light layer 13, also can establish the multiple side in the non-range upon range of orientation of first leaded light layer 13, to the specific quantity of first light source, the embodiment of the utility model provides a do not do specifically limit.

Similarly, the shape, material and effect of the first light source mentioned in the embodiments of the present invention can be referred to the third light source 60 mentioned in the following embodiments, which is not repeated herein.

Fig. 5 is a schematic structural diagram of a fluorescent structure according to still another embodiment of the present invention. The embodiment shown in fig. 5 is extended based on the embodiment shown in fig. 4, and the differences between the embodiment shown in fig. 5 and the embodiment shown in fig. 4 will be emphasized below, and the descriptions of the same parts will not be repeated.

As shown in fig. 5, in the embodiment of the present invention, the first reflection unit 121 includes a micro prism 1212. Also, the phosphor structure 100 further includes a support member 14 positioned at a side of the first sub-reflective layer 12 away from the phosphor layer 11. The supporting member 14 is used to support the first sub-reflective layer 12 to support the reflective cavities 1213 corresponding to the plurality of microprisms 1212.

It will be appreciated that the reflective cavity 1213 is loaded with a low refractive material such as a gas (e.g., air). In practical applications, the combination of the microprisms 1212 and the reflective cavities 1213 can perform the functions of the microprism unit 1211 as described in the embodiments above.

Compared with the embodiment shown in fig. 4, the cavity structure has a longer life cycle and less pollution than the pad pasting structure (usually, a metal film is adopted, the metal film is easy to oxidize, and pollution is generated in the upstream and downstream processes), and the fluorescence of the fluorescent structure provided by the embodiment of the utility model is more uniform. In addition, the embodiment of the present invention can further expand the auxiliary function of the fluorescent structure by means of the supporting member.

In one embodiment of the present invention, the material of the support member 14 includes a luminous material to improve the adaptability and the application versatility of the fluorescent structure 100. For example, when the fluorescent structure 100 is applied to a triangle warning board for traffic warning, when there is no sunlight and no illumination from a headlight (such as at night), neither the fluorescent layer nor the reflective layer of the fluorescent structure 100 is functional. In this case, the purpose of traffic warning can be achieved by means of the support part 14 comprising a luminous material.

Fig. 6 is a schematic structural diagram of a fluorescent structure according to still another embodiment of the present invention. The embodiment shown in fig. 6 is extended based on the embodiment shown in fig. 1, and the differences between the embodiment shown in fig. 6 and the embodiment shown in fig. 1 will be emphasized below, and the descriptions of the same parts will not be repeated.

As shown in fig. 6, the embodiment of the present invention provides a fluorescent structure 100 with the transparent layer 20, the adhesive layer 30 and the backing paper layer 40 removed. Also, in the embodiment of the present invention, the reflective layer includes a second sub reflective layer 16 disposed to be stacked on the fluorescent layer 11 and located at a second side of the fluorescent layer 11. The second sub-reflecting layer 16 is used for various angles of light incidence, and the emergent light is integrated with the effect of a specific angle.

Preferably, the fluorescent structure 100 further comprises a second light guiding layer 15. The second light guide layer 15 is stacked between the fluorescent layer 11 and the second sub-reflective layer 16. The second sub-reflective layer 16 conforms to a second predetermined light guiding condition.

As shown in fig. 6, the second sub-reflective layer 16 includes a plurality of second reflective units 161. The second reflecting unit 161 is a microprism-like or prism structure, and the function of the second reflecting unit is different from that of the microprism, in that the structure 161 can obtain external incident light in multiple directions at a larger angle, including scattering, diffusion and direct light, and at the same time, the emitted light is collected in the normal direction, and most of the emitted light in the non-normal direction is incident into the adjacent structure 161 and returns to 100, so that the 16 structure can obtain more incident light and collect the emitted light in a certain angle range such as the normal direction (the microprism requires total retroreflection, while the 161 requires most of the light to be emitted at the normal angle, so although the microprism or prism structure is also a micro prism or prism structure, the retroreflection purpose of the microprism is different).

Since the light receiving area of the second sub-reflective layer 16 is much larger than the plane, light in multiple directions in the environment can enter the fluorescent structure 100 through the second reflective unit 161, so that the light entering amount into the fluorescent structure 100 is increased, and the fluorescent effect of the fluorescent structure 100 is improved.

On the other hand, the prism structure shown in the second reflection unit 161, such as a Brightness Enhancement Film (BEF), has a light-condensing effect. When light is emitted from the second sub-reflection layer 16 toward the second light guide layer 15, most of the light is finally emitted in a direction close to the normal direction due to the structural characteristics of the second light guide layer 15. Therefore, by providing the second sub-reflective layer 16, the luminance of the emitted light is greatly increased (the direction of the emitted light is adjusted to the normal direction due to the increase of the incident light) when viewed from the front of the exterior, thereby improving the fluorescent effect of the fluorescent structure 100.

Therefore, the prism structure increases the light quantity, and adjusts the direction of the emergent light to be close to the normal direction, thereby leading the front observer to feel bright light and enhancing the fluorescent effect at a specific angle.

Compared with the embodiment shown in fig. 5, the embodiment shown in fig. 6 makes full use of the incident light from the outside, and emits the excitation light and the reflected light in the normal direction better. The angle of an observer is smaller, the brightness is stronger, and the LED street lamp is particularly suitable for road warning and warning at a longer distance.

In another embodiment of the present invention, the fluorescent structure 100 further includes a second light source located in the non-lamination direction of the second light guide layer 15. Similarly, the shape, material and effect of the second light source mentioned in the embodiments of the present invention can be referred to the third light source 60 mentioned in the following embodiments, which is not repeated herein.

It is noted that, with respect to the fluorescent structure mentioned in the above embodiment, if the excitation light emitted by the first light source is yellow light, such as yellow light in a predetermined wavelength range around 580nm, such as 580nm ± 10 nm. Then, even under the weather that sunlight illuminance is weak such as haze, fog, the stronger yellow light of penetrability also can guarantee the visual warning reinforcing effect, and then overcome current traffic fluorescence structure and all possessed the defect of visual reinforcing effect under any illumination. In addition, through the flicker type excitation of the light source, the excitation of the signal types is short, short and long, so that the signal type has stronger effect and signal content indication effect on an observer, and the defects of the fluorescent warning equipment and the standard defects are thoroughly changed.

In addition, it should be noted that, the wavelength of the light source is combined with the excitation wavelength of the fluorescent material, i.e. the input of the specific wavelength excites the fluorescent light of the specific color, for example, the excitation light is input with a wavelength of orange, and the fluorescent material excites the fluorescent light with a wavelength of red, so that the incident light and the fluorescent light are both lights with stronger warning properties, such as orange and red, thereby superposing and outputting the warning effect (for example, in cloudy days, the application can ensure that the fluorescent warning effect is stronger than that in the best sunshine in sunny days). In addition, if the exciting lights with different wavelengths are used and the fluorescent material has one or more wave bands, the exciting lights with different colors can be emitted according to the control requirements, especially at night, pedestrians and vehicles can be warned through color signals. Of course, the wavelength of incident light can be changed to perform the warning and color conversion of the surface light source.

Furthermore, when the equipment is not powered on, the system meets and exceeds the requirements of the national standard in the aspect of the existing fluorescence because of adopting the structure of the application, and when the equipment is powered on, the defects of the European standard and the national standard technical design are completely overcome.

Fig. 7 is a schematic structural diagram of an optical device according to an embodiment of the present invention. As shown in fig. 7, the optical device 70 includes a third light guiding layer 71 and a functional layer 72. The third light guide layer 71 and the functional layer 72 are stacked. The third light guide layer 71 may be configured to collect light incident into the third light guide layer 71 in a direction normal to the third light guide layer 71.

The normal direction of the third light guide layer 71 may refer to a z-axis direction shown in fig. 7, for example, that is, a direction perpendicular to the upper surface and/or the lower surface of the third light guide layer 71.

The third light guide layer 71 may be, for example, a nano light guide plate or a micro light guide plate, and nano-sized or micro-sized particles may be distributed therein.

The light incident into the third light guiding layer 71 may be scattered, reflected, or diffusely reflected when encountering the microparticles. Since the dimension of the third light guiding layer 71 in the normal direction is much smaller than the dimensions of the other directions, the light near the normal direction (or the light with a smaller angle to the normal direction) encounters a smaller number of micro-particles during the propagation process, while the light with a larger angle to the normal direction encounters more micro-particles. That is, the probability that light near the normal direction encounters the microparticles is smaller, and the light is easier to be emitted from the third light guiding layer 71; and the probability that light with a larger included angle with the normal direction meets the microparticles is higher, and scattering, reflection or diffuse reflection is easier to occur under the action of the microparticles.

After scattering, reflection, or diffuse reflection, light with a large angle with the normal direction will be emitted from the third light guiding layer 71 if the direction is close to the normal direction, and will continue to be scattered, reflected, or diffuse reflected under the action of the microparticles if the direction is still large with the normal direction. Most of the light exits the third light guiding layer 71 in a direction close to the normal line after multiple scattering, reflection or diffuse reflection. As a result, the third light guide layer 71 can collect the light incident on the third light guide layer 71 in the normal direction of the third light guide layer 71.

Of course, the third light guiding layer 71 is not limited to a nanometer light guiding plate or a micrometer light guiding plate, and in some embodiments of the present invention, the third light guiding layer 71 may also be a nanometer light guiding film or a micrometer light guiding film. Compared with a light guide plate, the light guide plate can be better implemented on a non-plane surface, and meanwhile, the light guide plate can be better suitable for flexible equipment or irregular equipment or application scenes with thinner thickness requirements.

The functional layer 72 may be used, for example, to transmit light to the third light guiding layer 71 based on light from the third light guiding layer 71.

The functional layer 72 can be implemented in many ways, and the embodiment of the present invention is not limited thereto. In an embodiment of the present invention, the functional layer 72 includes the fluorescent structure mentioned in any of the above embodiments. In another embodiment of the present invention, the functional layer 72 is a fluorescent structure as mentioned in any of the above embodiments.

Compared with the existing optical device, the optical device 70 provided by this embodiment has better warning effect.

Specifically, existing optical devices typically include only a phosphor layer. After the fluorescent layer is excited, the excited fluorescent light is emitted in all directions. Thus, only a small portion of the fluorescence can be emitted in a direction close to the normal and is finally observed by the observer facing the optical device, while the remaining most of the excited fluorescence is difficult to be observed by the observer facing the optical device because the emission direction deviates greatly from the normal direction of the fluorescent layer, and therefore, the warning effect of the conventional fluorescent device is poor.

And to the utility model provides an optical device, the light of various angles can both be under the effect of third leaded light layer 71 among the external environment, by the functional layer 72 of being led to uniformly to it is more abundant to make fluorescence arouse. Meanwhile, after the fluorescence excited by the functional layer 72 enters the third light guiding layer 71, the fluorescence close to the normal direction can be directly emitted, and the fluorescence with a larger included angle with the normal direction can be continuously scattered, reflected or diffusely reflected under the action of the microparticles, and finally most of the fluorescence can be emitted in the direction close to the normal. Therefore, compared with the prior art, the optical device 70 provided in this embodiment can collect the excited fluorescence to the normal direction, and significantly improve the warning effect observed in the normal direction, so that the observer facing the optical device 70 feels a stronger warning effect. Therefore, the optical device 70 provided by this embodiment can have a better warning effect even in an application scene with weak ambient light, such as non-clear weather.

Due to the existence of the third light guide layer, the emission direction of the excited fluorescence is effectively collected, so that the excited fluorescence can be uniformly emitted in the direction close to the normal line, and the optical device can still have a better warning effect even under the condition of weak ambient light.

In order to further enhance the fluorescence effect of the optical device, in some embodiments of the present invention, a fluorescent unit may also be disposed in the third light guiding layer 71.

The fluorescent cells may be, for example, particles of fluorescent material distributed in the third light guiding layer 71, which may have a size of nanometer or micrometer to reduce the influence on the light transmittance of the third light guiding layer 71. Of course, the embodiments of the present invention are not particularly limited with respect to the shape and size of the phosphor element. It should be understood that by changing and adjusting the structure, size and density of the nanoparticles, using reflection and diffuse reflection, the outgoing light angle can be more concentrated near the normal angle, and the incoming light can be more transmitted near the normal angle; incident light in the stacking direction is emitted more uniformly and is much closer to the normal direction, so that the application scene of traffic warning is adapted.

Thus, the light incident on the third light guide layer 71 can excite the fluorescent cells to generate fluorescence. That is, in addition to the functional layer 72 being capable of generating fluorescence excitation, the fluorescent cells in the third light guide layer 71 are also capable of generating fluorescence excitation, and finally, the fluorescence excited in the functional layer 72 and the third light guide layer 71 is emitted from the third light guide layer 71 in a direction away from the functional layer 72. Since both the third light guide layer 71 and the functional layer 72 can generate fluorescence excitation, the amount of the excited fluorescence is larger than that generated by only the functional layer 72, and thus, a better fluorescence effect can be achieved.

Preferably, in some embodiments, when the fluorescent cells in the third light guide layer 71 are excited, the first excitation light can be emitted, and correspondingly, the functional layer 72 can be excited by the first excitation light to emit the second excitation light; and/or, when the functional layer 72 is excited, the second excitation light may be emitted, and correspondingly, the fluorescent unit in the third light guiding layer 71 can be excited by the second excitation light to emit the first excitation light. In this way, the fluorescent units in the third light guiding layer 71 and the functional layer 72 are excited with each other to generate a fluorescence-excited chain reaction, thereby generating an enhanced fluorescence-excited effect under a certain external light intensity.

In other words, if the excited fluorescence generated by the fluorescent unit of the third light guiding layer 71 can excite the fluorescent substance of the functional layer 72 to generate fluorescence excitation, or the fluorescence excited by the functional layer 72 can excite the fluorescent unit of the third light guiding layer 71 to generate fluorescence, a fluorescence chain reaction will occur in the optical device (the fluorescence chain reaction refers to exciting the first excitation light generated by the first fluorescent substance, and just exciting the second fluorescent substance to generate the second excitation light).

In addition, when both the third light guide layer 71 and the functional layer 72 have a fluorescent material, even if the influence of mutual excitation (chain reaction) is not considered, for example, red fluorescence is excited only by ultraviolet rays (normal warning color), the fluorescent effect is enhanced because the fluorescence excitation amount of the third light guide layer 71 and the functional layer 72 is larger than that of either the third light guide layer 71 or the functional layer 72.

If the chain reaction is used, it should be noted that the fluorescence generated by the fluorescent unit in the third light guiding layer 71 and the fluorescence generated by the energy layer 72 should belong to light with similar wavelengths, for example, both in the wavelength range from orange red to red, so that the warning color is uniform. Of course, the fluorescent material may be a material with double or multiple excitable wavelengths in the ultraviolet and visible bands.

Preferably, in the embodiment where the third light guide layer 71 is a micro-nano light guide plate, the micro-particles in the third light guide layer may be made of a fluorescent material to form a fluorescent unit. Thus, the microparticles can not only play a role in collecting light, but also play a role in fluorescence.

In this implementation, the exit direction of light can be changed by using the microparticles in the light guide layer, so that the excited fluorescence approaches the normal direction when passing through the third light guide layer 71, thereby enhancing the fluorescence effect (the fluorescence not near the normal direction is excited, and is also changed into the normal direction by the third light guide layer 71). In addition, the incident light from the outside (the side far from the functional layer 72 from the third light guide layer 71) is scattered, reflected or diffused by the micro-and nano-particles in the light guide layer regardless of the incident light angle, so that the light is repeatedly reflected and excited when being emitted between the third light guide layer 71 and the functional layer 72, and thus the excitation effect is sufficient, so that the excitation effect is far superior to the effect when only the functional layer 72 is irradiated with the external light, and when there is a fluorescent unit in the third light guide layer 71, the light is also sufficiently excited, so that the fluorescent effect is enhanced, and when only the third light guide layer 71 is used, when the light is in the side direction (the best uniform incident light angle), only half of the light is emitted from the other surface, so that the effect is far inferior to the effect of overlapping the third light guide layer 71 and the functional layer 72.

In the practical application scenario, the light in the environment is in multiple directions, and the light with a large included angle between the direction and the normal direction of the third light guide layer 71 is fully utilized to improve the utilization rate of the external light. In some embodiments of the present invention, the optical device may further include a first light direction changing layer stacked on one side of the third light guiding layer 71 away from the functional layer 72.

The embodiment is described below in an exemplary manner with reference to the drawings.

Fig. 8 shows an optical device according to another embodiment of the present invention.

Referring to fig. 8, the optical device 70 includes, in addition to the third light guide layer 71 and the functional layer 72, a first light direction changing layer 73 that is stacked on a side of the third light guide layer 71 away from the functional layer 72.

The first light direction changing layer 73 is used to refract light incident to the first light direction changing layer 73 so as to reduce an angle between the propagation direction of light entering the third light guide layer 71 through the first light direction changing layer 73 and the normal of the third light guide layer 71.

Dotted arrow λ in fig. 8₁、λ₂And λ₃Representing incident light in different directions, have a larger included angle with the normal f of the third light guiding layer 71. Passing through a first light sourceAfter refraction treatment of the direction-changing layer 73, the light λ₁、λ₂And λ₃Can be incident on the functional layer 72 in a direction close to the normal f. Especially for light λ having a direction with a maximum angle to the normal f₁Light lambda is applied by the first light direction changing layer 73₁Is effectively utilized.

By arranging the first light direction changing layer 73, light with a large included angle with the normal of the third light guide layer 71 in the environment can enter the functional layer 72 in a direction close to the normal, so that the light in the environment is more fully utilized, and a better fluorescence effect can be achieved even if the ambient light is weak.

The first light direction changing layer 73 can be implemented in many ways, and the embodiment of the present invention is not limited thereto.

For example, in some embodiments, the first light direction changing layer 73 may be a microlens film or a microlens array disposed on the third light guiding layer 71.

For example, in some embodiments, the first light direction changing layer 73 may be a micro-prism film or an array of micro-prisms disposed on the third light guiding layer 71.

Preferably, in some embodiments, the first light-direction changing layer 73 may also include a plurality of light-direction changing sublayers.

This embodiment is described in detail below with reference to the drawings.

As shown in fig. 9, the first light-direction changing layer 73 includes a plurality of light-direction changing sublayers. The refractive indices of the plurality of light direction changing sublayers increase in order in the direction from the light direction changing layer 73 to the third light guiding layer 71.

It should be understood that the embodiment of the present invention is not limited to the specific number of the light direction changing sub-layers, and those skilled in the art can set the number according to actual requirements.

According to the principle of refraction, incident light λ is refracted at the interface of every two light-redirecting sublayers after entering the first light-redirecting layer 73. After multiple refractions, the angle of the incident light λ gradually approaches the normal f, and finally enters the third light guiding layer 71 in a direction approaching the normal.

It is considered that total reflection occurs when light enters a medium having a lower refractive index from a medium having a higher refractive index. Therefore, in order to reflect light having a large angle with the normal direction of the third light guide layer 71 back into the third light guide layer 71, only light having a small angle with the normal direction is emitted, thereby improving the fluorescent effect in the front view direction. The refractive index of the first light direction changing layer 73 should be set to be smaller than that of the third light guiding layer 71. Thus, light having a large angle with the normal of the third light guide layer 71 is totally reflected toward the interface between the third light guide layer 71 and the first light direction changing layer 73, and is reflected back to the functional layer 72.

As shown in fig. 10, in this embodiment, the optical device 70 includes, in addition to the third light guiding layer 71 and the functional layer 72, the second light direction changing layer 50 disposed on a side of the third light guiding layer 71 away from the functional layer 72.

The second light-direction changing layer 50 may, for example, comprise a plurality of micro-prismatic strip structures 51.

The second light direction changing layer 50 may be, for example, a film layer attached to a side of the third light guiding layer 71 away from the functional layer 72, and may be, for example, a bef (bright Enhancement film) bright Enhancement film. The second light direction changing layer 50 may be integrally formed on the surface of the third light guide layer 71 on the side away from the functional layer 72, for example.

Through setting up the second light direction change layer, on the one hand, consider that the photic area on prism surface is far greater than the plane to increased the income light volume that enters into optical device, made the fluorescent material in the optical device can obtain more abundant excitation. On the other hand, the second light direction changing layer has a function of collecting light. Specifically, when light is emitted from the third light guide layer 71 to the second light direction changing layer 50, due to the structural characteristics of the second light direction changing layer 50, only light rays close to the normal direction are emitted to the observer, while emitted light rays in other directions which are not reflected are emitted back to the inside due to the emission angle of the second light direction changing layer 50, and light rays having a large included angle with the normal are reflected back to the third light guide layer 71 again, so that light circulation is repeated, and most of light is finally emitted in a direction close to the normal direction. Therefore, by providing the second light direction changing layer, the luminance of the emitted light is greatly increased (the direction of the emitted light is adjusted to the normal direction due to the increase of the incident light) when viewed from the front side of the exterior, thereby improving the fluorescent effect of the optical device 70.

It should be understood that the second light direction changing layer shown in fig. 10 is only a light direction changing layer provided in an embodiment of the present invention. In other embodiments of the present invention, the second light direction changing layer may not include the angular bar structure, but includes a plurality of triangular pyramid prisms, and the angle of the outgoing light can be controlled by adjusting the angle thereof.

In order to protect the micro-prism strip structure of the second light direction changing layer, in some embodiments, the side of the second light direction changing layer away from the third light guiding layer 71 may be provided with a high light transmission and low reflection protective film/layer.

As shown in fig. 11, in this embodiment, the optical device 70 may further include a third light source 60 in addition to the third light guiding layer 71 and the functional layer 72. Third light source 60 may be located on the non-lamination direction side of third light guide layer 71.

The number of the third light sources 60 may be one or multiple, and the third light sources may be disposed on one side of the third light guide layer 71 in the non-stacking direction, or disposed on multiple sides of the third light guide layer 71 in the non-stacking direction, and the embodiment of the present invention is not limited to the specific number and the specific position of the third light sources 60.

Light L emitted from the third light source 60₁The light can be incident on the third light guide layer 71 from the non-lamination direction side of the third light guide layer 71. Since the first light guide plate 71 has microparticles distributed therein, light L₁After entering the third light guide layer 71, the light is uniformly guided to both sides of the third light guide layer 71 in the stacking direction by scattering, reflection, and diffuse reflection. A portion of the light L₁The light is guided to the side of the third light guide layer 71 away from the functional layer 72, and most of the light is emitted in a direction close to the normal of the third light guide layer 71. Another part of the light L₁Is directed to the functional layer 72 to generate light L₂. Under the action of the third light guide layer 71, the light L₂Similarly, most of the light from the side of the third light guide layer 71 away from the functional layer 72 is emitted in a direction close to the normal of the third light guide layer 71.

Through setting up the third light source, can show improvement optical device's warning effect. Specifically, on one hand, a part of light emitted by the third light source can be emitted from one side of the third light guide layer away from the functional layer in a direction close to the normal of the third light guide layer under the action of the third light guide layer, and the part of light is combined with fluorescence excited by the optical device, so that the light emitted by the optical device is more striking. On the other hand, the fluorescent material in the optical device may be excited by light emitted from the third light source, and thus, more striking fluorescence may be excited in conjunction with excitation by ambient light such as sunlight. In addition, due to the existence of the third light source, the optical device thoroughly gets rid of the dependence on ambient light such as sunlight and the like, and in non-clear weather, even if the light in the environment is insufficient, the optical device still has a good warning effect, so that all-weather warning is realized.

In some embodiments, the wavelength range of the light emitted by the third light source and the wavelength range of the fluorescence excited by the fluorescent material in the optical device may belong to a certain preset wavelength range, so that the emitted light of the third light source and the fluorescence excited by the fluorescent material belong to the same color tone. For example, if the light emitted from the third light source is orange red, the fluorescence emitted from the fluorescent material is also orange red or red. Therefore, the light emitted by the third light source and the fluorescence excited by the fluorescent material can have better fluorescence effect after being superposed, and is more striking.

It is to be understood that fluorescent material refers to fluorescent material that constitutes a phosphor layer and/or phosphor element in an optical device.

In some embodiments, the light emitted by the third light source and/or the fluorescent light in the optical device that is excited by the fluorescent material of the third light source may include light in the yellow wavelength range. Compared with light of other colors, the penetration of yellow light in rain and haze is better, so that the optical device provided by the embodiment can keep a better fluorescence effect in fog and haze weather.

And in addition, when equipment does not have electricity, the system is because adopted the utility model discloses a structure, so reach, satisfy, exceed the requirement of the national standard in the aspect of current fluorescence, and when having electricity, whole the European standard of remedying, the national standard technical design defect.

In some embodiments, the fluorescent material in the optical device may include multiple fluorescent materials, different fluorescent materials may be excited by light of different wavelength ranges, and the wavelength ranges of the fluorescence light excited by different fluorescent materials may also be different.

For example, the fluorescent material may include a first fluorescent material and a second fluorescent material. The first fluorescent material is configured to be a when received₁Light in a wavelength range is excited to a₂Light of a wavelength range. The second fluorescent material is configured to be received b₁B is excited when light in a wavelength range is emitted₂Light of a wavelength range.

Therefore, the optical device can emit fluorescence of different colors under the excitation of light with different wavelength ranges, so that the optical device can emit fluorescence of multiple colors, the warning of the warning device is more flexible, and the warning effect of the optical device is further improved.

When a plurality of fluorescent materials having different excitation wavelengths are provided in the optical device in consideration of light having various wavelength ranges in the environment, the optical device is excited to emit light of a plurality of colors, thereby causing color confusion.

As shown in fig. 12, in this embodiment, the optical device 70 may further include a light filtering layer 74 disposed on a side of the third light guiding layer 71 away from the functional layer 72. The light filtering layer 74 serves to prevent light of a predetermined wavelength range from being incident to the third light guiding layer 71.

The light filter layer 74 may, for example, filter out all of the light in the environment that is capable of exciting different fluorescent substances in the optical device 70, controlling the color of the fluorescence of the optical device 70 by controlling only the light of the different wavelength ranges output by the third light source 60.

The light filter layer 74 may also be arranged to allow light that is capable of exciting a certain fluorescent material to enter, for example, so that the optics may fluoresce a certain color when the third light source 60 is not switched on. When the fluorescent color needs to be changed, other fluorescent materials are excited by the third light source 60.

By providing the light filter layer 74, light of a predetermined wavelength range can be prevented from entering the optical device, thereby avoiding color confusion caused by simultaneous excitation of a plurality of fluorescent substances.

The light filtering layer 74 can be implemented in many ways, and the embodiment of the present invention is not limited in particular. In certain embodiments, the light filtering layer 74 may be a filtering membrane capable of filtering light of a certain wavelength range, such as a membrane that filters ultraviolet light. In some embodiments, the light filtering layer 74 may also be an electrochromic glass or electrochromic film, so that the wavelength range of the incident light can be controlled according to actual needs.

As shown in fig. 13, the optical device 70 may further include a light blocking layer 80. The light blocking layer 80 is provided on the non-folding direction side of the third light guide layer 71, and is configured to transmit light to the third light guide layer 71 based on light incident from the third light guide layer 71 to the light blocking layer 80.

Alternatively, the light blocking layer 80 may be, for example, a reflective layer, so as to reflect light from the third light guiding layer 71 back to the third light guiding layer 71 by way of reflection.

Alternatively, the light blocking layer 80 may also be a fluorescent layer, for example, so as to excite fluorescent light based on light from the third light guide layer 71 and emit the fluorescent light toward the third light guide layer 71.

Preferably, the light blocking layer 80 may have the same structure as the functional layer 72, for example.

Through setting up the light blocking layer, can prevent effectively that light from the non-range upon range of direction side of third leaded light layer from spouting to all the collection of the light of each direction in the third leaded light layer is to spouting from the side of keeping away from the functional layer, further increases optical device's fluorescence effect.

In order to improve the self-cleaning performance of the optical device, water drops in rainy and foggy days affect the light effect, and in some embodiments, the outermost side of the optical device far away from the functional layer can be subjected to hydrophobic or super-hydrophobic treatment.

It will be appreciated that the hydrophobic treatment needs to be arranged according to the structure of the optical device so as not to destroy the original optical properties of the optical device while ensuring the hydrophobic effect.

Fig. 14 is a schematic view of a warning device according to an embodiment of the present invention. As shown in fig. 14, the warning device 140 includes an optical device 141 and a control module 142. Optics 141 are communicatively coupled to control module 142. The control module 142 is used for controlling the light emitting mode of the optical device 141 according to the requirement information.

Through setting up optical device and control module for warning device's warning effect can be adjusted according to demand information, thereby has satisfied the in-service use demand better.

The optical device 141 can be implemented in many ways, and the embodiment of the present invention is not limited to this. For example, the optical device may be a signal light provided on the warning device. For example, the optical device may also be an array of LEDs arranged on the warning device.

In an embodiment of the present invention, the optical device 141 is the optical device 70 mentioned in the above embodiment.

Illustratively, the light emitting mode of the optical device 141 may relate to turning on or off of the optical device 141, a color or blinking pattern of the emitted light, or the like. It should be understood that the embodiment of the present invention is not particularly limited to the light emitting mode.

Optionally, in some embodiments, control device 142 may be used to control the turning on or off of optical device 141. For example, when the intensity of the ambient light is sufficient, the warning device 140 can utilize the fluorescence effect excited by the ambient light to achieve the warning effect, and when the ambient light is weak, the optical device 141 can be controlled to be turned on, so that the warning device 140 can still have a better warning effect when the light is weak.

Optionally, in some embodiments, control device 142 may be used to control the color of optical device 141. For example, in normal weather, the color of the optical device 141 can be controlled to be striking red, and in foggy, haze or sand-dust weather, the optical device 141 can be controlled to emit yellow light, so as to improve the light penetration ability and prevent the warning device 140 from losing the warning effect in the environment with low visibility.

Optionally, in some embodiments, control device 142 may be used to control the blinking pattern of optical device 141. For example, the eye-catching level of the optical device 141 can be increased by increasing its flicker frequency. Information transfer may also be achieved, for example, by incorporating blinking and/or color changes to form some kind of signal encoding.

It should be noted that, the form and the obtaining manner of the requirement information may be various, and the embodiment of the present invention is not particularly limited.

Optionally, in some embodiments, referring to fig. 15, the alerting device 140 may further include an information input module 143 communicatively coupled to the control module 142. The information input module 143 may be used for a user to input the demand information.

The information input module 143 may be, for example, an input panel disposed on the warning device 140, and a user may control a light emitting mode of the optical device through the input panel.

For example, when the ambient light is weak, the user may turn on the optical device 141 through the input panel. In a foggy day, the user may adjust the light emission color of the optical device 141 to approximate yellow light through the input panel. The user may also adjust the blinking frequency of the optical device 141 via the input panel to adjust the eye-catching level of the optical device 141. The user can also adjust the flicker frequency and the color change of the optical device 141 through the input panel to realize the coding and transmission of information.

Due to the existence of the information input module, convenience is brought to the use of a user. The user can input the demand information through the information input module according to actual demands, so that the control module can control the light emitting mode of the optical device according to the demand information input by the user, and actual use demands can be better met.

Optionally, in some embodiments, referring again to fig. 15, the alert device 140 may further include a first sensor module 144. The first sensor module 144 may be used to determine environmental information of the environment in which the alert device 140 is located.

The requirement information may include environmental information of the environment where the warning device 140 is located, so that the control module 142 may control the light emitting mode of the optical device 141 according to the environmental information of the environment where the warning device 140 is located, which is determined by the first sensor module 144, so as to further facilitate the user.

The environmental information and the type of the first sensor module 144 may be various, and the embodiment of the present invention is not particularly limited thereto.

For example, in some embodiments, the environmental information may include visibility information, i.e., visibility of the environment in which the warning device 140 is located. Correspondingly, the first sensor module may comprise a visibility sensor.

Thus, when the weather is a fog day, a haze day or a dust day, the first sensor module of the warning device 140 can detect the visibility of the environment where the warning device 140 is located. When the visibility of the environment is lower than the preset value, the control module 142 can be used to control the optical device 141 to emit yellow light, so as to improve the light penetration capability and prevent the warning device 140 from losing the warning effect in the environment with low visibility.

For example, in some embodiments, the environmental information may include brightness information, i.e., the brightness of the environment in which the warning device 140 is located. Correspondingly, the first sensor module 144 may include a light sensor (or brightness sensor).

In this way, in an application scene with weak ambient light, such as rainy weather, the warning device 140 can detect the brightness of the environment where the warning device 140 is located through the first sensor module 144. When the detected brightness of the environment is lower than the preset value, the control module 142 can be used to control the optical device 141 to be turned on, so as to prevent the warning device 140 from losing the warning effect when the brightness of the environment is insufficient.

Optionally, in some embodiments, the warning device 140 may further include a first communication module 145. The first communication module 145 is communicatively coupled to the control module 142. The warning device 140 may obtain the demand information through the first communication module 145.

Illustratively, in some embodiments, the first communication module 145 may be configured to obtain the requirement information from a server side. For example, the first communication module 145 may obtain weather information (for example, weather forecast information) of the location of the warning device 140 from the server, so that the control module 142 may control the light emitting mode of the optical device 141 according to the weather information to cope with different weathers, and the warning device 140 may have a better warning effect under different weathers.

For example, in some embodiments, the first communication module 145 may be configured to obtain the requirement information from a user terminal such as a mobile phone. The user terminal can be provided with an APP (or called application), and the user can input the requirement information on the APP. In this way, the user can directly use the user terminal such as a mobile phone to adjust the light emitting mode of the light emitting device 141, thereby bringing convenience to the user.

The embodiment of the utility model provides a warning device can be the traffic awl for example, also can be warning sign for example, also can be reflection of light post, to warning device's concrete form, the embodiment of the utility model provides a do not do the injecing.

Preferably, in some embodiments, the warning device in the aforementioned embodiments may be a triangle warning board.

When sudden failure parking maintenance or accidents happen on the road, the triangular warning board can be placed at a certain distance away from the direction of the coming vehicle (for example, in an urban road, the triangular warning board can be placed at a distance of 50 meters away from the direction of the coming vehicle), so that other vehicles can be reminded to avoid the accident, and the secondary accident is avoided.

If the warning effect is not good enough, serious secondary traffic accidents can be caused. Therefore, the triangular warning board has higher requirements on warning effect compared with other warning devices.

However, the existing triangular warning board is difficult to achieve the expected warning effect in non-clear weather, and has serious potential safety hazard. In addition, the existing triangular warning board can only play a role of passive warning through a retro-reflector or a fluorescent device, and cannot realize active warning or information transmission through modes such as flashing or color change.

The embodiment of the utility model provides a triangle warning tablet compares in current triangle warning tablet, has all-weather warning effect, and can realize initiatively warning or transmit information to show the warning effect that has promoted triangle warning tablet, reduce the possibility of secondary traffic accident by a wide margin.

The triangular warning board usually has a folding function, and when the triangular warning board is not used, the triangular warning board needs to be folded so as to reduce the occupied space, and when the triangular warning board needs to be used, the triangular warning board is unfolded.

However, the existing triangle warning sign requires two hands for splicing when being unfolded, which causes inconvenience to the user. This inconvenience becomes more apparent especially when the user is injured by a car accident.

In order to solve the problem, the embodiment of the utility model provides a triangle warning board that can singlehanded concatenation.

Referring to fig. 16 to 19, the triangular warning board 200 includes: including a first part 21, a second part 22 and a third part 23 of the support structure.

The second member 22 includes opposing first and second ends 221 and 222. The first end 221 of the second member 22 is rotatably connected to the first member 21.

The third part 23 comprises opposite third 231 and fourth 232 ends. The third end 231 is rotatably connected to the second end 222 of the second member 22. The fourth end 232 is removably connected to the first member 21.

This is different from the structure of the existing triangle warning board, in which the connection of the second part 22 and the third part 23 is detachable, that is, the connection of the second end 222 and the third end 231 is detachable. Thus, the user needs two hands to support the second portion 22 and the third portion 23, respectively, to complete the splicing of the second portion 22 and the third portion 23 when unfolding the triangle warning sign.

While this embodiment provides triangular warning sign 200 with the third portion 23 removably attached to the first portion 21, i.e., with the fourth end 232 removably attached to the first portion 21. Thus, when the triangular warning board 20 is spliced by a user, the user does not need two hands to respectively support the second part 22 and the third part 23, and the fourth end 232 can be connected to the first part 21 by only one hand to complete the splicing of the triangular warning board 200, so that the triangular warning board is convenient for the user to use, and is particularly convenient for a wounded driver or a female driver after an accident and under the condition that the mobile phone is held by the other hand after the accident.

The support structure may for example be a member for supporting the warning device. The support structure may for example comprise

legs

211 and 212 arranged at the bottom of the first part 21. For example, a support leg 213 rotatably provided at the bottom of the first member 21 may be included. It should be understood that the implementation manner of the supporting structure may be various, and the embodiments of the present invention are not limited in particular.

In some embodiments, referring again to fig. 17 and 19, the first component 21 may further include a receiving space 215. The receiving space 215 is used to receive the second portion 22 and the third portion 23. So set up, shared space when can reducing triangle warning tablet and accomodate the state for triangle warning tablet after accomodating is more regular, compares in current triangle tablet, and is more like an industrial product.

The fourth end of the third component can be detachably connected to the first component in many ways, and the embodiment of the present invention is not limited in particular.

Illustratively, in some embodiments, referring again to fig. 17 and 19, a hanging clip 233 can be disposed on the fourth end 232 of the third member 23, and correspondingly, the stop 214 can be disposed on the first member 21.

When splicing, the hanging card 233 is only required to be connected to the stop block 214 in an overlapping mode through rotation, and splicing can be completed. When the hanger is disassembled, the third member 23 is only required to be rotated to separate the hanging card 233 from the stop block 214, so that the disassembly can be completed.

Through setting up hanging card and dog for the user can conveniently accomplish the concatenation and the dismantlement of triangle warning tablet.

For example, in some embodiments, magnets may be disposed on the fourth end 232 of the third member 23 and the corresponding position of the first member 21, respectively, so as to facilitate the assembly and disassembly by magnetic attraction. However, care should be taken with respect to the strength of the magnet field to prevent the magnet from interfering with the direction sensor.

The optics in the foregoing embodiments may be provided on one or more of the first, second or third components, for example.

Optionally, in some embodiments, the optics may include a first optic, a second optic, and a third optic. The first, second and third optics may be disposed on the first, second and third components, respectively.

Preferably, in some embodiments, the first optic, the second optic, and the third optic may constitute a retro-reflector and/or a fluorescent of the triangular warning sign.

The warning effect of the optical device generally decays gradually with increasing distance and will be lost when a certain distance is exceeded. However, when the driving speed of the coming vehicle is high, it may be too late to do a response when the triangular warning board is found.

To address this issue, in some embodiments, the triangle warning sign of embodiments of the present invention may further include a second sensor module and a second communication module communicatively coupled to the control module. The second sensor module may be used to obtain the position and orientation of the warning device. The second communication module is used for sending the report information to the server side. The reported information comprises the position and the orientation of the triangular warning board.

The second sensor module may include, for example, a position sensor and an orientation sensor.

Position sensor for example can be satellite positioning sensor such as big dipper or GPS, certainly also can be other types of position sensor, to this, the embodiment of the utility model provides a do not do specifically and restrict.

The direction sensor may be, for example, an electronic compass, and may also be other types of direction sensors, for which the embodiments of the present invention are not particularly limited.

In case of an accident, the triangular warning plate is usually placed with the optical device facing the incoming vehicle, so that the direction sensor can detect the direction of the triangular warning plate. Therefore, when an accident is reported, the accident direction can be calculated according to the road direction on the GIS at the position and the value returned by the direction sensor, so that the position of the accident can be reported, and the driving direction of the road on which the accident is located can also be reported. It is worth noting that the position and direction information can be calculated by combining with GIS data of the background server end to obtain the accident direction, only the accident direction is fed back, the position and GIS are not available, and the alarm format information of roads, directions, accident kilometers and meters required by units such as traffic police, emergency and the like can not be calculated.

Reporting the incident is particularly important towards this point. Different driving directions of the existing road are usually spaced, if only the position is reported, the background server end cannot know which driving direction of the road the accident occurs in, so that the vehicles passing through the accident site cannot be accurately guided to avoid.

After the position and the orientation are reported to the server side, the server side can remind and guide the vehicle in the path accident position when the distance from the accident site is far away through the information platform comprising a vehicle navigation system, a traffic police platform, a vehicle internet of things and the like.

Through setting up the second sensor or obtain the position and the orientation of triangle warning tablet to report to the server side through second communication module, realized reminding outside the stadia and the vehicle in guide way, thereby realized the beyond-the-horizon warning, further improved the warning effect of triangle warning tablet.

Considering that there may be multiple lanes in the same driving direction, it is still impossible to accurately know that the accident specifically occupies that lane only by reporting the position and orientation.

Thus, in some embodiments, the reporting information may also include lane occupation information of the incident. The lane occupancy information is used to indicate a lane occupied by the accident. The user can input the lane occupation information through the APP of the mobile terminal such as a mobile phone. Therefore, the embodiments of the present invention are not particularly limited.

When an accident is reported, the position, the orientation and the lane occupation information are reported simultaneously, so that the position of the accident can be more accurately determined, and vehicles in the path can be more accurately reminded and guided.

Optionally, in some embodiments, the user may also input the type or attribute of the incident. For example, the user may enter a rating for the incident. The accident grade can be, for example, an accident grade specified by a traffic law, and can be classified into a general accident, a light accident, a major accident and the like. Therefore, after the background server receives the accident level reported by the user, the relevant party (such as a traffic police) can make corresponding response according to the accident level. For example, the user may also input whether the accident is a fire or whether medical assistance is needed, so that the fire department or medical department may perform a fire task or medical assistance in a timely manner.

In order to further facilitate the use of the user, in some embodiments, the triangle warning board provided by the embodiments of the present invention may further include a wake-up module in communication connection with the control module. The awakening module is used for awakening the warning device when the triangular warning board is adjusted to the unfolding state.

The wake-up module may for example comprise a detection means and a detection point, respectively arranged at the connection of two parts which are detachable. When the two parts are spliced together, the detection device is close to the detection point, so that the triangular warning board is detected to be adjusted to the unfolding state, and the triangular warning board is awakened.

Illustratively, in some embodiments, a magnet may be disposed on the fourth end 232 of the third member 23. The first member 21 may be provided with a reed switch at a location where it is connected to the fourth end 232. Thus, when the fourth end 232 is connected to the first member 21, the reed switch approaches the magnet, thereby detecting that the triangular warning board 200 is adjusted to the unfolded state.

Illustratively, in some embodiments, an angle sensor may be disposed within the circuit board of the second or

third member

22, 23, such that when the included angle of the second or

third member

22, 23 is greater than a predetermined angle (e.g., greater than 45 degrees), the deployed state may be understood.

Alternatively, in some embodiments, sensors may be used on the circuit board in the first section 21 to detect whether it is lying horizontally, so that in combination with the angle sensors in the second or

third sections

22, 23, it can be determined whether the triangle is deployed, rather than laid flat.

It should be appreciated that there are a variety of implementations of the wake-up module, and that the above implementations are merely exemplary. The embodiment of the utility model provides a do not do specifically and restrict to the implementation of awakening up the module.

Through setting up awakening module for the user only needs to expand triangle warning tablet, just can awaken up triangle warning tablet, thereby has further made things convenient for user's use, has promoted user experience.

Of course, the alarm can be combined with the storage box body, and the alarm can wake up when leaving the storage box.

Of course, the above-mentioned wake-up part can be replaced by a switch circuit when simplifying the function, for example, the magneto-electric wake-up is changed into a magneto-electric switch mode or directly changed into a circuit switch.

In some embodiments, the triangle warning sign provided by the present invention may further include an enhanced sensor module and a third communication module communicatively coupled to the control module.

It should be understood that, in the foregoing embodiment, the first communication module, the second communication module, and the third communication module may be a same communication module having a function of receiving and sending information, or may be multiple different communication modules, and this embodiment of the present application is not particularly limited.

The enhanced sensor module is used for detecting the emergency so as to control the third communication module to report the emergency information to the server side through the control module.

Optionally, the enhanced sensor module may include, for example, an acceleration sensor, so that when the acceleration sensor detects abnormal acceleration information, the control module controls the third communication module to report the emergency information to the server side.

The abnormal acceleration information can be compared with the characteristic waveform mode of an acceleration sensor such as a violent impact, rotation, falling cliff and the like of the vehicle, so that the possible accident situation is monitored and identified.

Optionally, the enhanced sensor module may also include a sound sensor for detecting abnormal sounds or abnormal voices, for example, so as to report the emergency information to the server when the abnormal sounds or abnormal voices are detected.

The abnormal sound may include, for example, a sound having a decibel greater than a preset value, a specific sound characteristic of the collision. The abnormal voice may include voice information such as a help call, for example.

Optionally, the enhanced sensor module may also include a smoke or temperature sensor, for example, so as to report the emergency information to the server when smoke or a temperature greater than a preset value is detected. It will be appreciated that the vehicle may be considered to be on fire when smoke or a temperature greater than a preset value is detected.

Preferably, in certain embodiments of the present invention, the enhanced sensor module may include a variety of sensors, so as to improve the accuracy of the detection in combination with the variety of sensors.

In some serious accidents, the driver may be injured and unable to contact the rescue. Through the arrangement of the enhanced sensor module, the triangular warning board can automatically report accident information when an accident happens, so that the accident rescue can be more timely.

Considering that a considerable part of drivers are inexperienced and stressed after an accident, they may be blindly mislaid and not know how to arrange the triangle warning sign.

Therefore, in some embodiments, the triangle warning board provided by the present invention may further include a playing module in communication connection with the control module. The playing module is used for playing the voice guidance. The playing module may be a device capable of playing voice, such as a speaker.

It should be understood that the embodiment of the present invention is not limited to the content of the voice guidance. The content of the voice guidance may include, for example, how to handle the accident after the car accident in a legal and textbook manner, information for stabilizing the accident person after the accident, how to arrange the triangle warning sign, and how to deploy the triangle warning sign.

Illustratively, the voice guidance content may include "150 meters away from the host vehicle, optically facing the oncoming vehicle …".

Due to the existence of the playing module, when an accident occurs, a user can calm down, guide to use and arrange the triangular warning board according to voice, so that an accident person is caused to get calm down, and the accident is handled in a textbook mode instead of being caused to be more serious due to confusion or other emotional behaviors.

Voice prompt facility begins to report after the triangle warning sign is taken out the receiver, and this kind of design purpose is, when equipment awakens up, opens, guides and warns its calm after just providing the accident to the accident person very first time.

Therefore, in some embodiments, the triangle warning sign provided by the present invention may further include a detection module in communication with the control module. The detection module is used for detecting the position of the triangular warning board in the storage device for storing the triangular warning board, so that when the triangular warning board is separated from the preset position in the storage device, the control module controls the playing module to play voice guidance.

An exemplary implementation is given below in conjunction with the figures.

Referring to fig. 16 to 20, one side of the first member 21 of the triangular warning board 200 may be provided with a detection module 213, for example. Detection points 31 are provided at corresponding positions of storage case 300. The detection module 213 may be a magnetic reed switch, for example, and the detection point 31 may be a magnet, for example. When the triangular warning board 200 is stored in the storage box 300, the detection module 213 and the monitoring point 31 approach. When the warning triangle 200 is taken out of the storage case 300, the detection module 213 is separated from the detection point 31, so that the control module 213 controls the play module to play the voice guidance.

Obviously, the detection module 213 is not limited to the reed switch. In some embodiments, the detecting module 213 may also be a photoelectric switch, and the corresponding detecting point 21 may be a reflective plate, for example. The embodiment of the present invention is not limited to the specific form of the detection module 213.

Obviously, the position of the detection module 213 is not limited to one side of the first member 21. The detection module 213 may also be disposed at other positions, and the embodiment of the present invention is not limited thereto.

So set up for only need take out triangle warning tablet from the receiver, the broadcast module just can the automatic play pronunciation guide, thereby further made things convenient for user's use.

Optionally, in some embodiments, the position sensor may be further configured to detect a position at which the triangular warning board is taken out from the storage box and a position at which the triangular warning board is unfolded, and then it may be determined whether the placement position of the triangular warning board satisfies a requirement of a placement distance such as 50 meters, 150 meters, and the like based on GIS system operation. If the placement of the user does not meet the requirement, a prompt can be sent to the user, so that the situation that the placement distance of the triangular warning board does not meet the requirement is avoided.

Optionally, in some embodiments, weather and/or time may also be used as a parameter, so that whether the placement distance of the user meets the requirement is determined according to different weather and/or time. For example, the arrangement distance at high speed at night needs 200 meters, and the arrangement distance at rainy days also needs 200 meters.

It should be noted that the microstructures of the present invention, such as prisms, can be fabricated by micro-fabrication and nano-fabrication techniques (such as imprinting).

Optionally, in some embodiments, optics may be used to signal a rescue to passing personnel and/or vehicles in a scene requiring rescue. That is, an embodiment of the present disclosure further provides a warning device with rescue ability, which includes the optical device mentioned in any of the above embodiments, and the optical device is used for sending a rescue signal to a passing person and/or a vehicle in a scene needing rescue.

In particular, in the application scene that the wounded person appears in the accident and needs to be rescued, the warning device can control the flashing frequency and/or color of the optical device and/or the flashing sequence of the optical devices and the like to send rescue signals to the passing vehicles and people.

The embodiment of the present application is not particularly limited to the rescue signal. Illustratively, in some embodiments, the rescue signal may be an international general first aid signal, i.e., a blinking pattern of three long and three short.

Therefore, before the ambulance arrives, if people in the passing vehicles or people have the emergency rescue capacity, the people can participate in the rescue of the wounded in time after observing the rescue information, so that the wounded in the accident can be timely rescued, and the death rate of the wounded in the accident is reduced.

Claims

1. A fluorescent structure, comprising:

a fluorescent layer including a plurality of fluorescent grooves penetrating the fluorescent layer in a stacking direction of the fluorescent layer; and

a reflective layer disposed in a stack with the fluorescent layer, the reflective layer being configured to perform a light reflection operation based on the plurality of fluorescent grooves.

2. The phosphor structure of claim 1, wherein a phosphor surface area of said phosphor layer is greater than an orthographic projection area of said phosphor layer in a plane of said reflective layer.

3. The phosphor structure of claim 1, wherein a phosphor area of said phosphor layer is larger than a corresponding planar area of said phosphor layer.

4. The phosphor structure of any of claims 1 to 3, wherein the reflective layer comprises a first sub-reflective layer stacked on the phosphor layer and located on a first side of the phosphor layer, the first sub-reflective layer comprises a plurality of first reflective units, the plurality of first reflective units are arranged in one-to-one correspondence with the plurality of phosphor slots, and an orthogonal projection of the plurality of first reflective units on a plane where the phosphor layer is located covers the plurality of phosphor slots.

5. The phosphor structure of claim 4, wherein said plurality of first reflective elements comprises a plurality of microprismatic elements.

6. The phosphor structure of claim 4, wherein the plurality of first reflective units comprise a plurality of microprisms, and further comprising a support member disposed on a side of the first sub-reflective layer remote from the phosphor layer, the support member supporting the first sub-reflective layer to support the reflective cavities corresponding to the plurality of microprisms.

7. The phosphor structure of claim 4, further comprising a first light guide layer stacked on the second side of the phosphor layer, the first light guide layer conforming to a first predetermined light guide condition.

8. The phosphor structure of claim 7, further comprising a first light source positioned in a non-lamination direction of the first light guiding layer.

9. The phosphor structure of any of claims 1 to 3, wherein said reflective layer comprises a second sub-reflective layer disposed on a second side of said phosphor layer in a stacked arrangement with said phosphor layer, said second sub-reflective layer configured to enhance light reflection.

10. The phosphor structure of claim 9, further comprising a second light guide layer, wherein the second light guide layer is stacked between the phosphor layer and the second sub-reflector layer, and the second light guide layer conforms to a second predetermined light guide condition.

11. The phosphor structure of claim 10, further comprising a second light source positioned in a non-lamination direction of the second light guiding layer.

12. The phosphor structure of claim 9, wherein the second sub-reflector layer comprises a plurality of second reflecting units, and the second reflecting units are prism structures.

13. An optical device, comprising:

a functional layer comprising the fluorescent structure of any of claims 1 to 12;

and a third light guide layer stacked on the functional layer, the third light guide layer being configured to collect light incident on the third light guide layer in a direction normal to the third light guide layer, and the functional layer being configured to transmit light to the third light guide layer based on light from the third light guide layer.

14. The optical device according to claim 13, further comprising a first light direction changing layer laminated on a side of the third light guiding layer away from the functional layer; the first light direction changing layer is used for refracting light entering the first light direction changing layer so as to reduce an included angle between the propagation direction of the light entering the third light guide layer through the first light direction changing layer and a normal of the third light guide layer.

15. The optical device according to claim 14, wherein the first light redirecting layer comprises a plurality of light redirecting sublayers having refractive indices that increase sequentially in a direction from the light redirecting layer to the third light guiding layer.

16. The optical device according to any one of claims 13 to 15, further comprising a second light direction changing layer disposed on a side of the third light guiding layer remote from the functional layer in a stacked manner, the second light direction changing layer comprising a plurality of micro-prism strip structures.

17. The optical device according to any one of claims 13 to 15, further comprising a light filtering layer disposed on a side of the third light guiding layer away from the functional layer, the light filtering layer being configured to block light of a predetermined wavelength range from entering the third light guiding layer.

18. The optical device according to any one of claims 13 to 15, further comprising a light-blocking layer provided on a non-lamination direction side of the third light guide layer, the light-blocking layer being configured to send light to the third light guide layer based on light from the third light guide layer.

19. The optical device according to any of claims 13 to 15, wherein the third light guiding layer has distributed therein fluorescent cells.

20. A warning device, comprising:

an optical device as claimed in any one of claims 13 to 19; and

and the control module is in communication connection with the optical device and is used for controlling the light emitting mode of the optical device according to the requirement information.

21. The warning device as claimed in claim 20, further comprising an information input module communicatively coupled to the control module, the information input module being configured for a user to input the demand information.

22. The warning device according to claim 20 or 21, further comprising:

a first member comprising a support structure for supporting the warning device;

a second member including opposite first and second ends, the first end rotatably connected to the first member;

a third member including opposing third and fourth ends, the third end rotatably connected to the second end of the second member, the fourth end removably connected to the first member.

23. The warning device according to claim 20 or 21, further comprising a wake-up module communicatively connected to the control module, wherein the wake-up module is configured to wake up the warning device when the warning device is adjusted to the unfolded state.

24. The warning device according to claim 20 or 21, further comprising a detection module communicatively connected to the control module, wherein the detection module is configured to detect a position of the warning device in a storage device for storing the warning device, so that when the warning device is out of a preset position in the storage device, the control module controls a playing module to play a voice guidance.

25. A warning device comprising an optical device according to any one of claims 13 to 19, wherein the optical device is adapted to signal a passing person and/or vehicle to provide a rescue signal in a scene in need of rescue.