CN214099049U

CN214099049U - Optical devices and warning devices

Info

Publication number: CN214099049U
Application number: CN202022830803.3U
Authority: CN
Inventors: 单正建
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-12
Filing date: 2020-11-30
Publication date: 2021-08-31
Anticipated expiration: 2030-11-30
Also published as: CN112365818A; CN112396985A; CN112365819A

Abstract

The present disclosure provides an optical device and a warning device. The optical device provided by the present disclosure includes a first light guide layer and a functional layer arranged in layers, wherein the first light guide layer is used for directing light incident into the first light guide layer to the first light guide layer The normal direction of , the functional layer is configured to send light to the first light guide layer based on the light from the first light guide layer. Due to the existence of the first light guide layer, the emission direction of the excited fluorescent light is effectively collected, so that the excited fluorescent light can be uniformly emitted in a direction close to the normal line, so that even in the case of weak ambient light, the The optical device can still have a better warning effect.

Description

Optical device and warning device

Technical Field

The disclosure relates to the technical field of optics, in particular to an optical device and a warning device.

Background

The warning device is usually provided with an optical device with a fluorescent effect, and the optical device can emit striking fluorescence under the excitation of light, so that a better warning effect is achieved.

In the case of a triangular warning sign, a fluorescent light is usually provided thereon. The whole or the surface of the fluorescent device is made of a fluorescent material so that fluorescence can be emitted under excitation of light.

However, when the ambient light is weak, the fluorescence excitation effect of the optical device used in the conventional warning device is not ideal enough, so that it is difficult to achieve the intended warning effect.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides an optical device and a warning device.

In a first aspect, the present disclosure provides an optical device, suitable for use in a warning device,

the light guide device comprises a first light guide layer and a functional layer which are arranged in a stacked mode, wherein the first light guide layer is used for collecting light which is emitted into the first light guide layer to the normal direction of the first light guide layer, and the functional layer is used for sending the light to the first light guide layer based on the light from the first light guide layer.

With reference to the first aspect, in some embodiments, the optical device further includes a first light direction changing layer stacked on a side of the first 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 first light guide layer through the first light direction changing layer and a normal of the first light guide layer.

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

With reference to the first aspect, in some embodiments, the optical device further includes a second light direction changing layer stacked on a side of the first 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 first aspect, in some embodiments, the optical device further includes a light filtering layer stacked on a side of the first light guiding layer away from the functional layer, where the light filtering layer is configured to prevent light in a preset wavelength range from entering the first light guiding layer.

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

With reference to the first aspect, in some embodiments, the optical device further includes a first light source located on a non-lamination direction side of the first light guide layer.

With reference to the first aspect, in some embodiments, the functional layer comprises a phosphor layer.

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

With reference to the first aspect, in some embodiments, the functional layer further includes a first reflective layer stacked on the fluorescent layer, wherein the fluorescent layer is provided with a plurality of fluorescent grooves penetrating through the fluorescent layer in a stacking direction of the fluorescent layer; the first reflecting layer is used for performing light reflecting operation based on the plurality of fluorescent grooves.

With reference to the first aspect, in some embodiments, a phosphor area of the phosphor layer is larger than an orthographic area of the phosphor layer in a plane of the first reflective layer.

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

With reference to the first aspect, in some embodiments, the first reflection layer includes a first sub-reflection layer stacked on a side of the fluorescent layer away from the first light guide layer, the first sub-reflection layer includes a plurality of first reflection units, the plurality of first reflection units are disposed in one-to-one correspondence with the plurality of fluorescent grooves, and an orthogonal projection of the plurality of first reflection 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 reflective units include a plurality of microprisms, and the functional layer further includes a supporting member located on a side of the first sub-reflective layer away from the fluorescent layer, the supporting member being configured to support the first sub-reflective layer to support the reflective cavities corresponding to the microprisms.

With reference to the first aspect, in some embodiments, the functional layer further includes a second light guide layer, and the second light guide layer is stacked between the fluorescent layer and the first light guide layer.

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

With reference to the first aspect, in some embodiments, the first reflective layer includes a second sub-reflective layer stacked between the fluorescent layer and the first light guide layer, and the second sub-reflective layer is configured to enhance a light reflection effect.

With reference to the first aspect, in some embodiments, the second sub-reflective layer includes a plurality of second reflective units including a plurality of micro prisms.

With reference to the first aspect, in some embodiments, the optical device further includes a third light guide layer stacked between the fluorescent layer and the second sub-reflective layer.

With reference to the first aspect, in some embodiments, the functional layer further includes a third light source located in a non-lamination direction of the third light guide layer.

With reference to the first aspect, in some embodiments, the functional layer includes a second reflective layer, and the first light guiding layer has fluorescent cells distributed therein.

In a second aspect, the present disclosure provides a warning device comprising any one of the optical devices provided in the first aspect.

Due to the existence of the first 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.

Drawings

Fig. 1 is a schematic structural diagram of an optical device according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of an optical device according to another embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a first light direction changing layer according to an embodiment of the disclosure.

Fig. 4 is a schematic structural diagram of an optical device according to still another embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of an optical device according to still another embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of an optical device according to still another embodiment of the present disclosure.

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

Fig. 8 is a schematic structural diagram of a functional layer according to an embodiment of the present disclosure.

Fig. 9 is a schematic structural diagram of a functional layer according to another embodiment of the present disclosure.

Fig. 10 is a schematic structural diagram of a functional layer according to still another embodiment of the present disclosure.

Fig. 11 is a schematic structural diagram of a functional layer according to still another embodiment of the present disclosure.

Fig. 12 is a schematic structural diagram of a functional layer according to still another embodiment of the present disclosure.

Fig. 13 is a schematic structural diagram of a functional layer according to still another embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Exemplary optical device

As shown in fig. 1, the optical device 10 includes a first light guiding layer 20 and a functional layer 30. The first light guiding layer 20 and the functional layer 30 are stacked.

The first light guide layer 20 may be configured to collect light incident into the first light guide layer 20 in a normal direction of the first light guide layer 20.

The normal direction of the first light guide layer 20 may refer to a z-axis direction shown in fig. 1, for example, that is, a direction perpendicular to the upper surface and/or the lower surface of the first light guide layer 20.

The first light guide layer 20 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 first light guiding layer 20 may be scattered, reflected, or diffusely reflected when encountering the micro-particles. Since the dimension of the first light guiding layer 20 in the normal direction is much smaller than the dimensions in other directions, light near the normal direction (or light with a smaller angle with the normal direction) encounters a smaller number of micro-particles during propagation, while light with a larger angle with the normal direction encounters more micro-particles.

That is, light near the normal direction has a lower probability of encountering the microparticles and is more easily emitted from the first light guiding layer 20; 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, if the direction of the light with a large angle with the normal direction is close to the normal direction, the light will be emitted from the first light guiding layer 20, and if the angle between the direction and the normal direction is still large, scattering, reflection or diffuse reflection will continue to occur under the action of the microparticles. Most of the light will exit the first light guiding layer 20 in a direction close to the normal after multiple scattering, reflection or diffuse reflection. As can be seen, the first light guide layer 20 can collect the light incident into the first light guide layer 20 in the normal direction of the first light guide layer 20.

Of course, the first light guide layer 20 is not limited to a nano light guide plate or a micro light guide plate, and in some embodiments of the disclosure, the first light guide layer 20 may also be a nano light guide film or a micro light guide 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 30 may be used, for example, to transmit light to the first light guiding layer 20 based on light from the first light guiding layer 20.

The functional layer 30 can be implemented in many ways, and the embodiment of the present disclosure is not limited thereto.

For example, in some embodiments, the functional layer 30 may include a fluorescent layer, so that the fluorescent light may be excited by the light from the first light guide layer 20 and the excited fluorescent light may be injected into the first light guide layer 20.

Illustratively, in some embodiments, the functional layer 30 may also include a reflective layer so that light from the first light guiding layer 20 may be reflected back to the first light guiding layer 20.

Compared with the existing optical device, the optical device 10 provided by the 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.

With the optical device provided by the present disclosure, light at various angles in the external environment can be uniformly guided to the functional layer 30 under the action of the first light guiding layer 20, so that fluorescence excitation is more sufficient. Meanwhile, after the fluorescence excited by the functional layer 30 enters the first light guide layer 20, 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 10 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 10 feels a stronger warning effect. Therefore, the optical device 10 provided by this embodiment can have a better warning effect even in an application scene with weak ambient light, such as non-clear weather.

To further enhance the fluorescence effect of the optical device, in some embodiments of the present disclosure, a fluorescent unit may also be disposed in the first light guiding layer 20.

The fluorescent cells may for example be particles of fluorescent material distributed in the first light guiding layer 20, which may have a nano-or micro-size to reduce the influence on the light transmission of the first light guiding layer 20. Of course, the disclosed embodiments are not particularly limited with respect to the shape and size of the phosphor elements. 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 to the first light guide layer 20 can excite the fluorescent cells to generate fluorescence. That is, in addition to the functional layer 30 generating fluorescence excitation, the fluorescence unit in the first light guide layer 20 also generating fluorescence excitation, and finally the fluorescence excited by the functional layer 30 and the first light guide layer 20 is emitted from the first light guide layer 20 in a direction away from the functional layer 30. Since both the first light guide layer 20 and the functional layer 30 can generate fluorescence excitation, the amount of the excited fluorescence is larger than that generated by only the functional layer 30, and thus, a better fluorescence effect can be achieved.

Preferably, in some embodiments, when the fluorescent cells in the first light guide layer 20 are excited, the first excitation light can be emitted, and correspondingly, the functional layer 30 can be excited by the first excitation light to emit the second excitation light; and/or, when the functional layer 30 is excited, the second excitation light may be emitted, and correspondingly, the fluorescent unit in the first light guide layer 20 can be excited by the second excitation light to emit the first excitation light. In this way, the fluorescent units in the first light guiding layer 20 and the functional layer 30 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 first light guiding layer 20 can excite the fluorescent substance of the functional layer 30 to generate fluorescence excitation, or the fluorescence excited by the functional layer 30 can excite the fluorescent unit of the first light guiding layer 20 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 first light guide layer 20 and the functional layer 30 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 first light guide layer 20 and the functional layer 30 is larger than that of either the first light guide layer 20 or the functional layer 30.

If a chain reaction is used, it should be noted that the fluorescence generated by the fluorescent units in the first light guiding layer 20 and the fluorescence generated by the energy layer 30 should belong to light with similar wavelengths, for example, all in the wavelength range from orange red to red, so that the warning color is a uniform color. 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 first light guide layer 20 is a micro-nano light guide plate, the micro-particles in the first 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 first light guide layer 20, thereby enhancing the fluorescence effect (the fluorescence not near the normal direction is excited, and is also changed into the normal direction by the first light guide layer 20). In addition, the external incident light (the side far away from the functional layer 30 from the first light guide layer 20), no matter what angle the incident light, will be because of the micro, nanoparticle takes place the scattering, reflection or diffuse reflection in the light guide layer, like this, light is repeatedly reflected and excited when penetrating between the first light guide layer 20 and the functional layer 30, so arouse fully, so arouse the effect far superior to the effect when only the functional layer 30 is shone by the external light, and when there is the fluorescence unit in the first light guide layer 20, also fully arouse, so the fluorescence effect is strengthened, and only the first light guide layer 20, when the light is for the side (best even direction incident light angle), also only nearly half light is penetrated from the another side, so the effect is far inferior to the first light guide layer 20 and the functional layer 30 superpose.

In the embodiment where the fluorescent units are disposed in the first light guide layer 20, the functional layer 30 may not include the fluorescent layer, but only include the second reflective layer having the reflective function.

Since the fluorescent unit is disposed in the first light guide layer 20, the fluorescent unit can be excited to generate fluorescence after light is incident into the first light guide layer 20. The fluorescence emitted to the second reflective layer is reflected back to the first light guide layer 20, so that the fluorescence generated by the fluorescence unit can be emitted from the side of the first light guide layer 20 away from the second reflective layer.

The optical device provided by this embodiment still has a better fluorescent effect, and at the same time, since the functional layer 30 only includes the reflective layer, the color of the optical device is determined only by the excitation light of the first light source because there is no fluorescent color of the functional layer 30. Therefore, the first light guide layer 20 can excite the excitation light of the fluorescent material in the first light guide layer 20 by the excitation light wavelength, so that when the first light guide layer 20 is made of a material excited by multiple wavelengths, different colors are generated by excitation of different input light wavelengths, and when the excitation light is invisible light such as ultraviolet, different colors are excited by different wavelengths, such as red and yellow alternately twinkling. The observer can obtain multiple colors on one fluorescence excitation optical structure, and only one fixed fluorescence is obtained before.

In the practical application scene, the light in the environment is multi-directional, in order to make full use of the direction and the light with the bigger included angle of the normal direction of the first light guide layer 20, in order to promote the utilization rate of the external light. In some embodiments of the present disclosure, the optical device may further include a first light direction changing layer stacked on a side of the first light guiding layer 20 away from the functional layer 30.

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

Fig. 2 illustrates an optical device provided in another embodiment of the present disclosure.

Referring to fig. 2, the optical device 10 includes, in addition to the first light guide layer 20 and the functional layer 30, a first light direction changing layer 40 stacked on a side of the first light guide layer 20 away from the functional layer 30.

The first light direction changing layer 40 is used to refract light incident to the first light direction changing layer 40 so as to reduce an angle between a propagation direction of light entering the first light guiding layer 20 through the first light direction changing layer 40 and a normal line of the first light guiding layer 20.

Dotted arrow λ in fig. 2₁、λ₂And λ₃Representing incident light in different directions, all have a larger angle with the normal f of the first light guiding layer 20. After being refracted by the first light-direction changing layer 40, the light λ₁、λ₂And λ₃Can be incident on the functional layer 30 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 caused by the first light direction changing layer 40₁Is effectively utilized.

Through setting up first light direction change layer 40 for the light that the normal contained angle is great with first leaded light layer 20 in the environment also can be incited to functional layer 30 with the direction that is close to the normal, thereby has utilized the light in the environment more fully, makes even ambient light is less strong, also can have the fluorescence effect of preferred.

The first light direction changing layer 40 can be implemented in many ways, and the embodiment of the present disclosure is not limited thereto.

For example, in some embodiments, the first light direction changing layer 40 may be a microlens film or an array of microlenses disposed on the first light guiding layer 20.

For example, in some embodiments, the first light direction changing layer 40 may be a microprism film or an array of microprisms disposed on the first light guiding layer 20.

Preferably, in some embodiments, the first light-direction changing layer 40 may also include a plurality of light-direction changing sublayers.

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

Fig. 3 is a schematic structural diagram of a first light direction changing layer according to an embodiment of the present disclosure.

As shown in fig. 3, the first light-direction changing layer 40 includes a plurality of light-direction changing sublayers. The refractive indices of the plurality of light direction changing sublayers increase in sequence in the direction from the light direction changing layer 40 to the first light guiding layer 20.

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

According to the refraction principle, after the incident light λ enters the first light-direction changing layer 40, refraction occurs at the boundary of every two first light-direction changing sublayers. After multiple refractions, the angle of the incident light λ gradually approaches the normal f, and finally enters the first light guiding layer 20 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 first light guide layer 20 back into the first light guide layer 20, 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 40 should be set to be smaller than the refractive index of the first light guiding layer 20. Thus, the light with a larger angle with the normal of the first light guiding layer 20 is totally reflected when it is incident to the interface between the first light guiding layer 20 and the first light direction changing layer 40, and is reflected back to the functional layer 30.

Fig. 4 is a schematic structural diagram of an optical device provided in accordance with yet another embodiment of the present disclosure.

As shown in fig. 4, in this embodiment, the optical device 10 includes, in addition to the first light guiding layer 20 and the functional layer 30, a second light direction changing layer 50 disposed on a side of the first light guiding layer 20 away from the functional layer 30.

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 the first light guiding layer 20 on the side away from the functional layer 30, 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 first light guide layer 20 on the side away from the functional layer 30, 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 first light guide layer 20 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 the 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 first light guide layer 20 again, so that the light circulation is repeated, and most of the 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 10.

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.

It should be understood that the second light-direction changing layer shown in fig. 4 is only a light-direction changing layer provided in an embodiment of the present disclosure. In other embodiments of the present disclosure, the second light-direction changing layer may not include the angular bar structure, but may include a plurality of triangular pyramid type prisms, and the angle of the outgoing light ray may 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 first light guiding layer 20 may be provided with a high light transmission and low reflection protective film/layer.

As shown in fig. 5, in this embodiment, the optical device 10 may further include a first light source 60 in addition to the first light guiding layer 20 and the functional layer 30. First light source 60 may be located on the non-lamination direction side of first light guide layer 20.

The number of the first light sources 60 may be one or multiple, and the first light sources may be disposed on one side of the first light guide layer 20 in the non-stacking direction, or disposed on multiple sides of the first light guide layer 20 in the non-stacking direction, and the specific number and specific positions of the first light sources 60 are not particularly limited in the embodiment of the disclosure.

Light L emitted by the first light source 60₁The light can be incident on first light guide layer 20 from the non-lamination direction side of first light guide layer 20. Since the first light guiding layer 20 has micro-particles distributed therein, light L₁After entering the first light guide layer 20, the light is uniformly guided to both sides of the first light guide layer 20 in the stacking direction by scattering, reflection, and diffuse reflection. A portion of the light L₁The light is guided to the side of the first light guide layer 20 away from the functional layer 30, and most of the light is emitted in a direction close to the normal of the first light guide layer 20. Another part of the light L₁Is directed to the functional layer 30 to generate light L₂. Under the action of the first light guiding layer 20, light L₂Most of the light from the side of the first light guiding layer 20 away from the functional layer 30 is emitted in a direction close to the normal of the first light guiding layer 20.

Through setting up first light source, can show improvement optical device's warning effect. Specifically, on one hand, a part of light emitted by the first light source can be emitted from one side of the first light guide layer away from the functional layer in a direction close to the normal of the first light guide layer under the action of the first 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 the light emitted from the first 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 first 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 first 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 first light source and the fluorescence excited by the fluorescent material belong to the same color tone. For example, if the light emitted by the first light source is orange red, the fluorescence emitted by the fluorescent material is also orange red or red. Therefore, the light emitted by the first 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 first light source and/or the fluorescent light in the optical device that is excited by the first 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.

Preferably, in some embodiments, the light emitted by the first light source and/or the light excited by the first light source by the fluorescent material in the optical device may be yellow light within a preset wavelength range of 580nm (for example, 580nm ± 10nm), so that even in weather with weak sunlight illumination such as haze and fog, the yellow light with strong penetrability can ensure the visual enhancement effect, and further overcome the defect that the fluorescent structure is difficult to have the visual enhancement effect under any illumination.

It is noted that with respect to the functional layer mentioned in the above embodiments, 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 vision warning reinforcing effect, and then has overcome the defect that current traffic function layer is difficult to all possess the vision 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 disclosed by the invention, and when the equipment is powered on, the defects of the European standard and the national standard technical design are completely overcome.

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.

Fig. 6 is a schematic structural diagram of an optical device provided in accordance with yet another embodiment of the present disclosure.

As shown in fig. 6, in this embodiment, the optical device 10 may further include a light filtering layer 70 disposed on a side of the first light guiding layer 20 away from the functional layer 30. The light filter layer 70 serves to prevent light of a predetermined wavelength range from being incident to the first light guide layer 20.

The light filter layer 70 may, for example, filter out all of the light in the environment that is capable of exciting different fluorescent substances in the optical device 10, controlling the color of the fluorescence of the optical device 10 by controlling only the light of the different wavelength ranges output by the first light source 60.

Light filter layer 70 may also be arranged to allow light that can excite a certain fluorescent material to enter, for example, so that the optics may fluoresce a certain color when first light source 60 is not turned on. When the fluorescent color needs to be changed, other fluorescent materials are excited by the first light source 60.

By providing the light filter layer 70, 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 70 can be implemented in many ways, and the embodiments of the present disclosure are not particularly limited. In certain embodiments, the light filtering layer 70 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, light filtering layer 70 may also be electrochromic glass or electrochromic film, so that the wavelength range of the incident light can be controlled according to actual needs.

Fig. 7 is a schematic structural diagram of an optical device provided in accordance with yet another embodiment of the present disclosure.

As shown in fig. 7, the optical device 10 may further include a light blocking layer 80. The light blocking layer 80 is disposed on the non-folding direction side of the first light guide layer 20, and is configured to transmit light to the first light guide layer 20 based on light incident from the first light guide layer 20 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 first light guiding layer 20 back to the first light guiding layer 20 by way of reflection.

Alternatively, the light blocking layer 80 may also be a fluorescent layer, for example, so that fluorescent light is excited based on light from the first light guide layer 20 and emitted toward the first light guide layer 20.

Preferably, the light blocking layer 80 may have the same structure as the functional layer 30, for example.

Through setting up the light blocking layer, can prevent effectively that light from the non-range upon range of direction side of first leaded light layer from spouting to all the collection of the light of each direction in the first leaded light layer is to spouting from the one 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.

Exemplary functional layers

Fig. 8 is a schematic structural diagram of a functional layer according to an embodiment of the present disclosure. As shown in fig. 8, the functional layer 30 provided by the embodiment of the present disclosure includes a fluorescent layer 31 and a first reflective layer stacked on the fluorescent layer 31. Specifically, the fluorescent layer 31 includes a plurality of fluorescent grooves 311, and the plurality of fluorescent grooves 311 penetrate the fluorescent layer 31 in the stacking direction (the vertical direction in the orientation shown in fig. 8) of the fluorescent layer 31. The first reflective layer includes a first sub-reflective layer 32, and the first sub-reflective layer 32 is located on a first side (lower side in the orientation shown in fig. 8) of the fluorescent layer 31. The first sub-reflective layer 32 includes a plurality of first reflective units 321, the plurality of first reflective units 321 are disposed in one-to-one correspondence with the plurality of fluorescent grooves 311 in the fluorescent layer 31, and the plurality of first reflective units 321 cover the plurality of fluorescent grooves 311 in an orthogonal projection of the fluorescent layer 31.

In addition, the functional layer 30 provided in the embodiment of the present disclosure further includes a transparent layer 33 stacked on the surface of the fluorescent layer 31 away from the first sub-reflective layer 32, and an adhesive layer 34 and a backing paper layer 35 sequentially stacked on the surface of the first sub-reflective layer 32 away from the fluorescent layer 31. The transparent layer 33 can serve, among other things, to support the fluorescent layer 31 and the emission layer. The adhesive layer 34 and the backing paper layer 35 are used to bond the fluorescent layer 31 and the reflective layer to other objects.

It should be understood that the above-mentioned transparent layer 33, adhesive layer 34 and backing paper layer 35 may be eliminated.

In the embodiment of the present disclosure, the fluorescent layer 31 is used for performing a fluorescent reaction based on incident light, and further exciting fluorescence. The first reflective layer is used for light reflection operation based on the plurality of fluorescent grooves 311. Since the circumferential groove wall of the fluorescent groove 311 is also capable of performing a fluorescent reaction based on incident light. Therefore, the fluorescent area of the fluorescent layer 31 is larger than the area of the fluorescent layer 31 in the orthographic projection of the plane in which the first sub-reflective layer 32 is located. In practical application, the fluorescence groove 311 can not only increase the area participating in fluorescence excitation by the circumferential groove wall, but also allow the excited fluorescence to enter the eyes of an observer in a specific direction by the reflection of the fluorescence groove 311 and the first reflection unit 321 corresponding to the fluorescence groove 311 at a specific angle through 321, 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 a specific direction (set by the 321 reflection structure angle), and the excitation light which has no effect on the observer originally is enhanced by the reflection structure, so that the warning effect is enhanced.

Preferably, the cross-sectional shape of the fluorescent groove 311 is an inverted trapezoid in a front view cross-sectional view oriented as shown in fig. 8. With this arrangement, the area of the fluorescence reaction can be further increased by the circumferential groove wall of the inverted trapezoidal fluorescence groove 311.

The fluorescent layer 31 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 functional layer comprising a fluorescent layer and/or a reflecting layer, the functional layer provided by the embodiment of the disclosure optimizes the fluorescent excitation effect by using the fluorescent layer arranged in a non-plane manner. In addition, due to the existence of the fluorescent groove 311, the incident light can directly reach the first reflecting unit 321 through the fluorescent groove 311 without passing through other hierarchical structures capable of weakening the incident light, the light loss is very small, the incident angle can be large (in the prior art, the fluorescent light generated by the light rays with such angles has almost no substantial effect on an observer), and the fluorescent light excited by the fluorescent layer 31 can also reach the first reflecting unit 321 through the fluorescent groove 311, so that the fluorescent effect is enhanced. Although in the embodiment of the present disclosure, the number of the first reflection units 321 in a unit area is less than the number of the first reflection units 321 completely laid in the unit area, due to the reduction of light loss, the 311 slot area and the utilization of scattered and diffused light rays, the functional layer provided in the embodiment of the present disclosure can optimize the fluorescence excitation effect, enhance the warning capability, and enhance the reflection effect. Especially, when the functional layer provided by the embodiment of the disclosure is applied to a triangular warning board, a road cone and the like for traffic warning, the fluorescence excitation effect and the reflection effect are optimized, the warning effect for drivers and passengers is further improved, and the probability of secondary accidents is further reduced. Particularly, in the case of a particle weather astronomical phenomena such as fog, sand and dust, the existing triangle warning board has a very poor reflection effect on yellow light, while the reflection effect on yellow light is not affected by the triangle warning board with the functional layer provided by the embodiment of the disclosure.

In an embodiment of the present disclosure, when the functional layer mentioned in the above embodiments 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 functional layer. Namely, the fluorescent requirement and the reflective requirement of the triangular warning board are simultaneously met by the functional layer. 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 functional layer mentioned in the embodiments of the present disclosure is not limited to be applied to a triangular warning board, and may be applied to other articles requiring warning after being attached to a structure such as an adhesive layer.

In addition, in the functional layer 30 shown in fig. 8, the fluorescent groove 311 may be filled with a transparent low-light loss material.

Exemplarily, the first reflection unit 321 is a micro prism unit 3211. Here, the microprism unit 3211 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 31 is larger than the orthographic area of the fluorescent layer 31 on the plane of the first reflective layer (e.g., the first sub-reflective layer 32). More preferably, the fluorescent area of the fluorescent layer 31 is larger than the corresponding planar area of the fluorescent layer 31. 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. 8 is a front view cross-section of the functional layer 30. In order to clearly show the structure of the functional layer 30, a schematic structural diagram of a top view angle of the functional layer 30 in another embodiment of the present disclosure is given below with reference to fig. 9.

In the front view cross-sectional view of the orientation shown in fig. 8, the cross-sectional shape of the fluorescent groove 311 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. 10.

Specifically, fig. 10 is a schematic structural diagram of a functional layer according to still another embodiment of the present disclosure. As shown in FIG. 10, the embodiment of FIG. 10 differs from the embodiment of FIG. 8 in that in the embodiment of FIG. 10, the cross-sectional shape of the fluorescence grooves 311 is semicircular.

Fig. 11 is a schematic structural diagram of a functional layer according to still another embodiment of the present disclosure. The embodiment shown in fig. 11 is extended based on the embodiment shown in fig. 8, and the differences between the embodiment shown in fig. 11 and the embodiment shown in fig. 8 will be emphasized below, and the descriptions of the same parts will not be repeated.

As shown in fig. 11, the functional layer 30 provided by the embodiment of the present disclosure removes the transparent layer 33, the adhesive layer 34, and the backing paper layer 35. Moreover, the functional layer 30 provided by the embodiment of the present disclosure further includes a second light guiding layer 36. The second light guide layer 36 is stacked on the second side (i.e. the upper side in the orientation shown in fig. 11) of the fluorescent layer 31, and the second light guide layer 36 conforms to the preset light guide condition.

Exemplarily, the second light guide layer 36 is made of a transparent light guide material, so that light incident to the second light guide layer 36 can be uniformly dispersed and conducted in the second light guide layer 36, and finally, a large amount of light is emitted in a normal direction close to a plane where the second light guide layer 36 is located, thereby achieving a purpose of improving a light effect of the functional layer 30 (compared with the existing scattering and diffusion).

Optionally, the second light guide layer 36 is a micro light guide plate or a nano light guide plate or a light guide film.

For example, the shape, material, and light effect of the second light guide layer 36 mentioned in the embodiments of the present disclosure can be referred to the first light layer 20 mentioned in the above embodiments, and the embodiments of the present disclosure are not described in detail.

In the practical application process, the incident light is firstly incident to the second light guiding layer 36, so that the second light guiding layer 36 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 second light guiding layer 36 reaches the fluorescent layer 31 and the first sub-reflecting layer 32, and finally, the fluorescence excited by the fluorescent layer 31 and the light reflected by the first sub-reflecting layer 32 are finally emitted through the second light guiding layer 36.

The functional layer that this disclosed embodiment provided has further improved the excitation light effect with the help of the second leaded light layer, plays the effect of the light outgoing collection direction substantially, and then has further improved the eye-catching degree of vision of functional layer.

In another embodiment of the present disclosure, a protective film structure is stacked on the light-entering side (e.g., the upper side of the functional layer in the orientation shown in fig. 11) of the functional layer mentioned in the above embodiments to protect the functional layer.

Another embodiment of the present disclosure extends beyond the embodiment shown in fig. 11. In the disclosed embodiment, the optical device 10 may further include a second light source (not shown) located in the non-lamination direction of the second light guiding layer 36. The non-lamination direction refers to an extending direction of a plane in which the second light guide layer 36 is located.

Preferably, the second light source is disposed in contact with the second light guiding layer 36.

The number of the second light sources may be one or multiple, and the second light sources may be disposed on one side of the second light guide layer 36 in the non-stacking direction, or disposed on multiple sides of the second light guide layer 36 in the non-stacking direction.

Similarly, the shape, the material, and the effect of the second light source mentioned in the embodiments of the present disclosure can be referred to the first light source mentioned in the above embodiments, and the embodiments of the present disclosure are not described again.

Fig. 12 is a schematic structural diagram of a functional layer according to still another embodiment of the present disclosure. The embodiment shown in fig. 12 is extended based on the embodiment shown in fig. 11, and the differences between the embodiment shown in fig. 12 and the embodiment shown in fig. 11 will be emphasized below, and the descriptions of the same parts will not be repeated.

As shown in fig. 12, in the embodiment of the present disclosure, the first reflection unit 321 includes a micro prism 3212. Also, the functional layer 30 further includes a supporting member 37 positioned at a side of the first sub-reflective layer 32 away from the fluorescent layer 31. The supporting member 37 serves to support the first sub-reflective layer 32 to support the reflective cavities 3213 corresponding to the plurality of microprisms 3212.

It will be appreciated that the reflective cavity 3213 is loaded with a low refractive substance such as a gas (e.g., air). In practical applications, the combination of the microprisms 3212 and the reflective cavities 3213 can achieve the functions of the microprism units 3211 mentioned in the above embodiments.

Compared with the embodiment shown in fig. 11, the cavity structure has a longer life cycle and less pollution (generally, a metal film is adopted, is easy to oxidize, and pollution is generated in both upstream and downstream processes) than the film-attached structure, and the fluorescence of the functional layer provided by the embodiment of the disclosure is more uniform. Furthermore, the disclosed embodiments enable further extension of the auxiliary function of the functional layer by means of the support member.

In one embodiment of the present disclosure, the material of the support member 37 comprises a luminescent material to improve the adaptability and the application versatility of the functional layer 30. For example, when the functional layer 30 is applied to a triangle warning board for traffic warning, when there is no sunlight and no rear headlight (for example, at night), neither the fluorescent layer nor the reflective layer in the functional layer 30 is effective. In this case, the purpose of traffic warning can be achieved by means of the support part 37 comprising a luminous material.

Fig. 13 is a schematic structural diagram of a functional layer according to still another embodiment of the present disclosure. The embodiment shown in fig. 13 is extended based on the embodiment shown in fig. 8, and the differences between the embodiment shown in fig. 13 and the embodiment shown in fig. 8 will be emphasized below, and the descriptions of the same parts will not be repeated.

As shown in fig. 13, the functional layer 30 provided by the embodiment of the present disclosure removes the transparent layer 33, the adhesive layer 34, and the backing paper layer 35. Also, in the embodiment of the present disclosure, the first reflective layer includes a second sub reflective layer 38 disposed to be stacked with the fluorescent layer 31 and located at the second side of the fluorescent layer 31. The second sub-reflective layer 38 is used for various angles of light incidence, and the emergent light is integrated with the effect of a specific angle.

Preferably, the functional layer 30 further comprises a third light guiding layer 39. The third light guide layer 39 is stacked between the fluorescent layer 31 and the second sub-reflective layer 38. The third light guide layer 39 conforms to a predetermined light guide condition.

As shown with continued reference to fig. 13, the second sub-reflective layer 38 includes a plurality of second reflective units 381. The second reflection unit 381 is a microprism-like or prism structure, and it is different from the microprism in that the second reflection unit 381 can obtain external incident light rays in multiple directions at a larger angle, including scattering, diffusion and direct light, and at the same time, collect the emitted light rays in a normal direction, and most of the emitted light rays in a non-normal direction are incident into the adjacent second reflection unit 381 and return to the functional layer 30, so that the second sub-reflection layer 38 can obtain more incident light rays, and collect the emitted light rays in a certain angle range such as a normal direction (the microprism requires total reflection, and the second reflection unit 381 requires most of the light rays to be emitted at normal angles, so although it is a microprism or prism structure, the reflection purpose is different from that of the microprism).

Compared with the embodiment shown in fig. 12, the external incident light is more fully utilized, and the excitation light and the reflected light are emitted in a better normal direction. However, the angle of an observer is smaller, the brightness is stronger, and the structure is particularly suitable for road warning and warning at a longer distance.

In another embodiment of the present disclosure, the optical device 10 may further include a third light source located in the non-lamination direction of the third light guide layer 39. Similarly, the shape, the material, and the effect of the third light source mentioned in the embodiments of the present disclosure can be referred to the first light source mentioned in the following embodiments, and the embodiments of the present disclosure are not described again.

Exemplary Warning device

Other embodiments of the present disclosure also provide a warning device. The warning device provided by the embodiment of the present disclosure includes the optical device in the foregoing embodiments.

The type of the warning device is not particularly limited in the embodiments of the present disclosure. For example, the warning device may be a triangle warning sign. For example, the warning device may also be a traffic cone. The warning device may also be a warning post, for example.

Preferably, in some embodiments, the warning device provided by the embodiments of the present disclosure may be a triangle warning board.

For the existing standard triangle warning board, the fluorescent effect can be guaranteed only when the intensity of light in the environment is sufficient. In non-clear weather, due to insufficient light intensity in the environment, the fluorescence excitation is insufficient, and the fluorescence effect is greatly reduced. In other than clear weather, accidents are easy to occur frequently, and if the triangular warning board is not ideal enough, secondary accidents are easy to happen.

By adopting the embodiment of the disclosure, the fluorescence effect can be enhanced, particularly in the embodiment adopting the excitation light source, the embodiment thoroughly gets rid of the fact that fluorescence depends on sunshine, and traffic accidents frequently occur when the weather is not good, namely the existing triangle standard is only suitable for ideal weather, but not suitable for weather with frequent accidents, the embodiment effectively realizes all-weather warning, even when fog is thick, the embodiment still uses yellow wavelength light for warning, and the existing standard can not adapt to the weather at all.

It should be noted that in the above embodiments of the present disclosure, all microstructures, such as microprisms, etc., can be fabricated using micro or 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.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. An optical device, characterized in that, suitable for a warning device, the optical device comprises a functional layer and a first light guide layer with microparticles distributed inside, wherein the first light guide layer and the functional layer are stacked It is arranged that the first light guide layer is used for collecting the light entering the first light guide layer to the normal direction of the first light guide layer, and the functional layer includes a fluorescent layer and/or a reflective layer , the functional layer is configured to transmit light to the first light guide layer based on the light from the first light guide layer.

2 . The optical device according to claim 1 , wherein the optical device further comprises a first light direction changing layer stacked on a side of the first light guide layer away from the functional layer; the The first light direction changing layer is used to refract light incident on the first light direction changing layer, so as to reduce the amount of light entering the first light guide layer through the first light direction changing layer. The included angle between the propagation direction and the normal of the first light guide layer.

3 . The optical device according to claim 2 , wherein the first light direction changing layer comprises a plurality of light direction changing sublayers, and the refractive indices of the plurality of light direction changing sublayers are along the light direction. 4 . The directions of changing layers to the first light guide layer are sequentially increased.

4. The optical device according to claim 1, characterized in that, the optical device further comprises a second light direction changing layer stacked on a side of the first light guide layer away from the functional layer, the The second light direction changing layer includes a plurality of microprism strip structures.

5 . The optical device according to claim 1 , wherein the optical device further comprises a light filter layer stacked on a side of the first light guide layer away from the functional layer, the light filter layer 5 . The layer is used to prevent light in a predetermined wavelength range from entering the first light guide layer.

6 . The optical device according to claim 1 , wherein the optical device further comprises a light blocking layer provided on the non-lamination direction side of the first light guide layer, the light blocking layer being used to The light of the first light guide layer transmits light to the first light guide layer.

7 . The optical device according to claim 1 , wherein the optical device further comprises a first light source located on the non-lamination direction side of the first light guide layer. 8 .

8. The optical device according to any one of claims 1 to 7, wherein the functional layer comprises the phosphor layer.

9 . The optical device according to claim 8 , wherein fluorescent units are distributed in the first light guide layer. 10 .

10 . The optical device according to claim 8 , wherein the functional layer further comprises a reflective layer laminated with the phosphor layer, wherein the phosphor layer is provided with a lamination direction along the phosphor layer. 11 . A plurality of fluorescent grooves are passed through the fluorescent layer; the reflection layer is used for performing a light reflection operation based on the plurality of fluorescent grooves.

11 . The optical device according to claim 10 , wherein the fluorescent area of the fluorescent layer is larger than the orthographic projection area of the fluorescent layer on the plane where the reflection layer is located. 12 .

12 . The optical device according to claim 10 , wherein the fluorescent area of the fluorescent layer is larger than the corresponding planar area of the fluorescent layer. 13 .

13 . The optical device according to claim 10 , wherein the reflection layer comprises a first sub-reflection layer stacked on a side of the fluorescent layer away from the first light guide layer, and the first sub-reflection layer The sub-reflection layer includes a plurality of first reflection units, the plurality of first reflection units are arranged in a one-to-one correspondence with the plurality of fluorescent grooves, and the orthographic projection of the plurality of first reflection units on the plane where the fluorescent layer is located covers the plurality of fluorescent grooves.

14. The optical device according to claim 13, wherein the plurality of first reflection units comprise a plurality of microprism units.

15. The optical device according to claim 13, wherein the plurality of first reflecting units comprise a plurality of microprisms, and the functional layer further comprises a plurality of first sub-reflection layers located far from the fluorescent layer A support member on one side, the support member is used to support the first sub-reflection layer, so as to support the reflection cavities corresponding to the plurality of microprisms.

16 . The optical device according to claim 13 , wherein the functional layer further comprises a second light guide layer, and the second light guide layer is stacked on the phosphor layer and the first light guide layer. 17 . between.

17. The optical device according to claim 16, wherein the optical device further comprises a second light source located in a non-lamination direction of the second light guide layer.

18 . The optical device according to claim 10 , wherein the reflection layer comprises a second sub-reflection layer laminated between the fluorescent layer and the first light guide layer, the second sub-reflection layer is 18 . The reflective layer is used to enhance the light reflection effect.

19. The optical device according to claim 18, wherein the second sub-reflection layer comprises a plurality of second reflection units, and the plurality of second reflection units comprise a plurality of microprisms.

20 . The optical device according to claim 18 , wherein the functional layer further comprises a third light guide layer laminated between the fluorescent layer and the second sub-reflection layer. 21 .

21. The optical device according to claim 20, wherein the optical device further comprises a third light source located in a non-lamination direction of the third light guide layer.

22. The optical device according to any one of claims 1 to 7, wherein the functional layer comprises the reflective layer, and fluorescent units are distributed in the first light guide layer.

23. An optical device, characterized in that it is suitable for a warning device, the optical device comprising:

a first light guide layer having microparticles distributed therein; and,

A functional layer stacked with the first light guide layer, the functional layer includes a fluorescent layer and/or a reflective layer, and the functional layer is used to transmit light from the first light guide layer to the first light guide layer based on the light from the first light guide layer. The light guide layer transmits light.

24. A warning device, characterized in that it comprises:

An optical device as claimed in any one of claims 1 to 23.

25. The warning device according to claim 24, wherein the optical device is used to send an ambulance signal to passing persons and/or vehicles in a scene requiring ambulance.