CN111450281A - Ultraviolet disinfection device and terminal based on optical waveguide - Google Patents
Ultraviolet disinfection device and terminal based on optical waveguide Download PDFInfo
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- CN111450281A CN111450281A CN202010468993.0A CN202010468993A CN111450281A CN 111450281 A CN111450281 A CN 111450281A CN 202010468993 A CN202010468993 A CN 202010468993A CN 111450281 A CN111450281 A CN 111450281A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultra-violet radiation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/24—Apparatus using programmed or automatic operation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/14—Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
Abstract
The invention provides an ultraviolet disinfection device and a terminal based on optical waveguide, comprising: the device comprises an ultraviolet light source, an optical coupler and an optical waveguide light guide film; the optical waveguide light guide film comprises a substrate layer and a flat light guide film layer from bottom to top; the refractive index of the substrate layer is smaller than that of the flat light guide film layer; the ultraviolet light source is used for providing ultraviolet light for disinfection; the optical coupler is used for receiving the ultraviolet light and coupling the ultraviolet light into the optical waveguide light guide film; the optical waveguide light directing film is transparent to ultraviolet light and is configured to receive the ultraviolet light to disinfect a surface of the optical waveguide light directing film. This application receives the leading-in ultraviolet ray of optical coupler through optical waveguide leaded light film, and the ultraviolet ray takes place the total reflection in optical waveguide leaded light film, can not take place the decay along with the distance, and the ultraviolet ray only takes place the light leakage in dirty attached position, and is less to the human injury, and the device is simple, can integrate and carry out ultraviolet disinfection, convenient to use to display device on the display device when needs.
Description
Technical Field
The invention belongs to the technical field of ultraviolet disinfection devices, and particularly relates to an ultraviolet disinfection device and a terminal based on optical waveguides.
Background
Humans are chronically afflicted with a variety of diseases, many of which are infections by bacteria or viruses through manual contact. The diligent washing of hands and the correct washing of hands are critical to reducing the spread of disease, but if viruses can be killed from the source, i.e., the surfaces of a large number of objects that we routinely touch with hands, we can live safer. The objects such as various buttons, handles, keyboards, mobile phone screens and the like which can not be bypassed in daily life are often the main sources of various bacteria and viruses, particularly the mobile phone screens, and researches show that the bacteria quantity of the mobile phone screens is more than that of randomly collected ATM keyboards, closestool flushing buttons and elevator buttons! The mobile phone, as the most frequently used portable device in our lives, may be a "source of poison", which is how terrorist is! People have no ever-seen, few habits of cleaning and disinfecting mobile phones regularly are provided, even if the mobile phones are cleaned, the mobile phones are only simply wiped, and the effect of killing bacteria and viruses is not large.
Uv disinfection has been widely used as an economically efficient and well-established technique, but it also has some significant disadvantages: first, the intensity of ultraviolet rays is greatly attenuated according to the square of the distance, and the intensity of ultraviolet rays has to be increased and the sterilization time has to be increased in order to achieve the sterilization effect. Second, ultraviolet radiation is harmful to the human body, and the human body may be damaged by the ultraviolet radiation for a long time, or even may cause cancer. Third, the existing germicidal lamps can only be used outside of the electronic device and cannot be integrated with electronic devices, especially flat panel displays, touch screens, and various key switches.
Therefore, the prior art is subject to further improvement.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide an ultraviolet disinfection device and a terminal based on an optical waveguide, which overcome the defects that the existing ultraviolet disinfection device has serious ultraviolet attenuation, needs to increase ultraviolet intensity and disinfection time; the human body can be carcinogenic after being subjected to ultraviolet radiation for a long time; the existing disinfection device can not be integrated on the display equipment, and has the defects of inconvenient use and the like.
The embodiment disclosed by the invention is an ultraviolet disinfection device based on optical waveguide, which comprises: the device comprises an ultraviolet light source, an optical coupler and an optical waveguide light guide film; the optical waveguide light guide film comprises a substrate layer and a flat light guide film layer from bottom to top; the refractive index of the substrate layer is smaller than that of the flat light guide film layer;
the ultraviolet light source is used for providing ultraviolet light for disinfection;
the optical coupler is used for receiving the ultraviolet light and coupling and guiding the ultraviolet light into the optical waveguide light guide film;
the optical waveguide light directing film is transparent to the ultraviolet light and is configured to receive the ultraviolet light to disinfect a surface of the optical waveguide light directing film.
The ultraviolet disinfection device based on the optical waveguide is characterized in that the ultraviolet light source is an ultraviolet L ED lamp bead, and the wavelength of the ultraviolet light source is smaller than 380 nm.
The ultraviolet disinfection device based on the optical waveguide is characterized in that the optical coupler is one of a grating coupler, a prism coupler, a lens coupler and coupling glue with matched refractive index.
The ultraviolet disinfection device based on the optical waveguide is characterized in that the flat light guide film layer is made of a transparent polymer optical waveguide film material; the substrate layer is made of a transparent material with a refractive index smaller than that of the flat light film layer; and the basal layer is coated on the surface of the flat light guide film layer.
The ultraviolet disinfection device based on the optical waveguide is characterized in that the substrate layer is made of a material which is high in ultraviolet light and is transparent to visible light.
The ultraviolet disinfection device based on the optical waveguide is characterized by further comprising a current driving circuit connected with the ultraviolet light source; and the power supply and the control circuit are connected with the current driving circuit.
The ultraviolet disinfection device based on the optical waveguide is characterized in that an ultraviolet reflection film layer is arranged on the peripheral side surface of the flat light guide film layer; the ultraviolet reflecting film layer is used for reflecting the ultraviolet light.
Another embodiment disclosed herein is a terminal comprising the optical waveguide-based ultraviolet disinfection device and a display; the ultraviolet disinfection device is arranged on the display.
The terminal, wherein the display comprises a touch screen; and an optical waveguide light guide film in the ultraviolet disinfection device is attached to the touch screen.
In another embodiment disclosed in the present invention, a terminal is provided, wherein the terminal comprises the ultraviolet disinfection device based on optical waveguide and a key or a switch; and an optical waveguide light guide film in the ultraviolet disinfection device is attached to the key or the switch.
The ultraviolet disinfection device and the terminal based on the optical waveguide have the advantages that the ultraviolet light guided by the optical coupler is received through the optical waveguide light guide film, and when the surface of the flat light guide film is clean, the ultraviolet light is totally reflected in the optical waveguide light guide film; when dirt exists on the surface of the flat light guide film layer, light leakage occurs at the dirt position by ultraviolet light in the light guide film layer, and therefore the dirt position is disinfected. The ultraviolet light is totally reflected in the optical waveguide light guide film and cannot be attenuated along with the distance, and the ultraviolet light is only leaked at the dirt attachment position, so that accurate disinfection is realized. The light guide effectively controls the leakage of UV light, and has small harm to human body. The ultraviolet disinfection device is simple in structure, can be conveniently made into a film form, can be integrated on the display device to carry out ultraviolet disinfection on the display device when needed, and is convenient to use.
Drawings
FIG. 1 is a schematic structural diagram of an ultraviolet disinfection device based on optical waveguides provided in an embodiment of the invention;
FIG. 2 is a schematic structural view of a longitudinal section of a planar optical waveguide;
FIG. 3 is a diagram showing the propagation path of ultraviolet light in the optical waveguide light guiding film in the state where the surface of the flat light guiding film layer is clean;
FIG. 4 is a diagram showing the propagation path of ultraviolet light in the optical waveguide light guiding film in the state of dirt on the surface of the flat light guiding film layer;
FIG. 5 is a diagram of the path of UV light propagating in an optical waveguide-based UV disinfection apparatus provided by the present invention when the optical coupler is a grating coupler;
FIG. 6 is a diagram of the path of UV light in a light guide based UV disinfection apparatus provided by the present invention when the optical coupler is a prism coupler;
FIG. 7 is a diagram of the path of UV light in a light guide based UV disinfection apparatus provided by the present invention when the optical coupler is a lens coupler;
fig. 8 is a schematic structural diagram of a control circuit and a current driving circuit in an ultraviolet disinfection device based on an optical waveguide provided in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Because the ultraviolet intensity of the ultraviolet disinfection device in the prior art is seriously attenuated along with the square of the distance, the ultraviolet intensity needs to be increased in order to achieve the disinfection effect, when a human body uses the existing ultraviolet disinfection device, the received ultraviolet radiation is easy to cause cancer, and in addition, the existing ultraviolet disinfection device can not be integrated into a display device, so that the use is inconvenient. In order to solve the above problems, the present invention provides an ultraviolet disinfection apparatus based on optical waveguide, as shown in fig. 1. The apparatus of the present invention comprises: an ultraviolet light source 101, a light coupler 102, and a light guiding film 103. The optical waveguide light guide film 103 comprises a base layer 1031 and a flat plate light guide film layer 1032 from bottom to top; the base layer 1031 has a refractive index less than the refractive index of the flat light directing film layer 1032. The ultraviolet light source 101 is used for providing ultraviolet light for disinfection; the optical coupler 102 is configured to receive the ultraviolet light and couple and guide the ultraviolet light into the optical waveguide light guiding film 103; the optical waveguide light guiding film 103 is transparent to the ultraviolet light and is configured to receive the ultraviolet light to sterilize the surface of the optical waveguide light guiding film 103.
As is well known, an optical waveguide is a light guide channel that transmits light waves while being confined in a specific medium or near the surface thereof, and includes a planar optical waveguide and a cylindrical optical waveguide. The simplest planar lightwave circuit consists of three layers of material, the middle layer being of refractive index n1The flat light guide film layer is covered on the surface of the substrate with the refractive index n2On the substrate layer, the flat light guide film layer has a refractive index n3The cover layer of (1). To construct an optical waveguide, n is required1Must be greater than n2And n3I.e. n1>n2，n1>n3So that the light can be confined to propagate through the film. As shown in fig. 2, in an ideal uniform medium, the planar optical waveguide has a refractive index difference only in the X direction, and the propagation of light in the planar optical waveguide can be regarded as that light is totally reflected at two interfaces of "flat light guiding film layer-base layer" and "flat light guiding film layer-cover layer", and light propagates along a zigzag path in the planar optical waveguide.
In specific implementation, in this embodiment, the cover layer is set to be an air layer, since the refractive index of air is 1, the refractive index of any other medium is greater than 1, and the refractive index of the base layer 1031 is smaller than the refractive index of the flat light guiding film layer 1032, after the ultraviolet light emitted by the ultraviolet light source 101 is coupled and guided into the optical waveguide light guiding film 103 through the optical coupler 102, in a clean state of the surface of the flat light guiding film layer 1032, a propagation path of the ultraviolet light in the optical waveguide light guiding film 103 is as shown in fig. 3, and the ultraviolet light guided into the optical waveguide light guiding film 103 is totally reflected on two interfaces, namely, the base layer-flat light guiding film layer and the "flat light. Under the condition that dirt 104 is attached to the surface of the flat light guide film layer 1032, the propagation path of ultraviolet light in the light guide film 103 is as shown in fig. 4, for example, the dirt 104 is liquid drops (such as water drops, oil stains and the like) with viruses, the air layer is replaced by another medium with a larger refractive index at the position of the dirt 104, and according to a critical angle calculation formula, the critical angle can be increased, so that the original condition meeting total reflection is changed, and part of light can be transmitted from the dirt 104, that is, light leakage occurs. The present invention utilizes this light leakage to allow the uv light in the flat light guiding film layer 1032 to leak out from the location of the dirt 104, i.e., to disinfect the location of the dirt 104. The ultraviolet light takes place the total reflection in optical waveguide leaded light film 103, can not take place the decay along with the distance, and the ultraviolet light only takes place the light leakage in dirty 104 attached position, and is less to the human injury, and the device is simple, can integrate and carry out ultraviolet disinfection, convenient to use to display device on the display device when needs.
Further, the ultraviolet light source 101 is a plurality of ultraviolet L ED lamp beads, and the ultraviolet L ED lamp beads have lower power consumption and higher efficiency compared with an ultraviolet lamp bulb in the existing ultraviolet disinfection device, and the lower power consumption can be maintained for a longer working time under the condition of the same electric quantity, so that electric energy is saved.
In specific implementation, in order to integrate the ultraviolet disinfection apparatus based on optical waveguide into an electronic device with a touch screen without affecting the normal use of the electronic device, such as a mobile phone, the optical waveguide light guide film 103 is a transparent film in this embodiment. In a specific embodiment, the flat light guide film layer 1032 is made of a transparent polymer light guide film material, the base layer 1031 is made of a transparent material with a refractive index smaller than that of the flat light film layer 1032, such as silicon dioxide and magnesium fluoride, the base layer 1031 is transparent to visible light and ultraviolet light, and the base layer 1031 is coated on the surface of the flat light guide film layer 1032.
In practical applications, the substrate layer 1031 may also be made of a material that is highly transparent to ultraviolet light and is instead transparent to visible light, such as an optical dielectric film and a metal film, which may not form a perfect optical waveguide but may function to strongly reflect ultraviolet light.
In specific implementation, in order to prevent the ultraviolet light coupled into the optical waveguide light guiding film 103 from leaking out from the peripheral edge of the optical waveguide light guiding film 103, in this embodiment, an ultraviolet reflecting film layer is disposed on the peripheral side surface of the flat light guiding film layer 1032 and is used for reflecting the ultraviolet light leaking out from the peripheral edge of the optical waveguide light guiding film 103 back into the flat light guiding film layer 1032.
Example one
In a first embodiment of the present invention, there is provided an optical waveguide-based uv disinfection apparatus, as shown in fig. 5, the optical waveguide-based uv disinfection apparatus includes a first uv light source, a first optical coupler 502, and a first optical waveguide light guiding film 503, where the first optical waveguide light guiding film 503 includes a first substrate layer 5031 and a first flat light guiding film layer 5032. The structure of the uv disinfection apparatus in this embodiment is the same as that of the uv disinfection apparatus mentioned in the previous step, and the only difference is that the first optical coupler 502 in this embodiment is a grating coupler, and the first optical coupler 502 is a periodic grating structure disposed on the first flat light guiding film layer 5032. After the incident light enters the first optical waveguide light guiding film 503 through the first optical coupler 502, guided wave light is formed in the Z direction of the first flat light guiding film layer 5032, and another part of the ultraviolet light is transmitted from the first flat light guiding film layer 5032 to the first substrate layer 5031 and is lost. The grating coupler has the advantages of no limit of the refractive index of the material of the first optical waveguide light guiding film 503, stable coupling efficiency and no need of strict control of the incident position of the light beam.
Example two
In the second embodiment of the present invention, as shown in fig. 6, the optical waveguide-based ultraviolet disinfection apparatus includes a second ultraviolet light source, a second optical coupler 602, and a second optical waveguide light guiding film 603, where the second optical waveguide light guiding film 603 includes a second substrate layer 6031 and a second flat light guiding film layer 6032. The structure of the uv disinfection apparatus in this embodiment is the same as that of the uv disinfection apparatus mentioned in the previous step, and the only difference is that the second optical coupler 602 in this embodiment is a prism coupler, when the incident angle of the uv light incident on the bottom of the second optical coupler 602 is greater than the critical angle of total reflection, an evanescent field is generated in the gap between the second optical coupler 602 and the second optical waveguide light guiding film 603, and the evanescent field can penetrate into the second light guiding film layer 6032 to excite the guided mode in the second light guiding film layer 6032 to form a uv light input, and at this time, the input uv light in the second optical coupler 602 transfers the uv light energy to the guided mode in the second optical waveguide light guiding film 603 through the coupling effect between the radiation mode and the guided mode, so that the prism coupler can guide the uv light into the second optical waveguide light guiding film 603. In order to improve the coupling efficiency of the prism coupler, the right edge of the incident beam, i.e. the ultraviolet light, must be precisely coincident with the right-angled tip of the second optical coupler 602, and if the edge of the beam is outside, i.e. right of, the right-angled tip of the second optical coupler 602, a part of the incident energy will be directly reflected or directly transmitted into the second optical waveguide light guiding film 603; if the beam edge is to the left of the right-angled tip of the optical coupler 602, a portion of the energy coupled into the optical waveguide light directing film 603 may be coupled back into the optical coupler 602 again. The advantage of using a prism coupler is that the coupling efficiency is high and the prism position can be adjusted as required to achieve maximum coupling strength.
EXAMPLE III
In a third embodiment of the present invention, as shown in fig. 7, the ultraviolet light disinfection apparatus based on optical waveguide includes a third ultraviolet light source, a third optical coupler 702 and a third optical waveguide light guiding film 703, where the third optical waveguide light guiding film 703 includes a third base layer 7031 and a third flat light guiding film 7032. The structure of the ultraviolet disinfection apparatus in this embodiment is the same as that of the ultraviolet disinfection apparatus mentioned in the previous step, and the only difference is that the third optical coupler 702 in this embodiment is a lens coupler, ultraviolet light provided by an ultraviolet light source is directly focused on the end face of the third flat light guide film layer 7032 by using the third optical coupler 702, and ultraviolet light beams within the waveguide numerical aperture are transmitted in the third flat light guide film layer 7032, so as to form a guided mode.
In a specific embodiment, the optical coupler may further be coupling glue with a matched refractive index, the ultraviolet light source and the optical waveguide light guiding film are directly connected through the coupling glue with a matched refractive index in a specific use process, and the ultraviolet light is guided into the optical waveguide light guiding film from the ultraviolet light source through the coupling glue with a matched refractive index.
In specific implementation, as shown in fig. 8, the ultraviolet disinfection apparatus based on optical waveguide further includes a current driving circuit connected to the ultraviolet light source for driving the ultraviolet light source to emit ultraviolet light, a power supply connected to the current driving circuit for supplying power to the ultraviolet light source, and a control circuit connected to the current driving circuit for controlling the ultraviolet light source. The power supply can be an external independent power supply, such as a battery and the like, and can also directly utilize an internal power supply of the electronic equipment; the control circuit may be provided separately or may be integrated into the control circuit of the electronic device when the electronic device is produced. The current driving circuit and the control circuit of the ultraviolet light source are a current driving circuit and a control circuit for driving and controlling the light source in the prior art, and are not described herein again.
In specific implementation, the ultraviolet disinfection device based on the optical waveguide can be applied to a plurality of scenes, for example, an ultraviolet light source and an optical coupler in the ultraviolet disinfection device based on the optical waveguide are integrated on a mobile phone, and an optical waveguide light guide film is attached to a mobile phone screen in a mode similar to a mobile phone film, so that automatic disinfection of the mobile phone is realized. For another example, the light guide film is made into a mobile phone cover, which is sleeved on the mobile phone to sterilize the mobile phone. For another example, the ultraviolet light source and the optical coupler are integrated on other various electronic devices, and the optical waveguide light guide film is attached to the surfaces of the keys and the switches, so that the electronic devices are disinfected.
In one embodiment, with continued reference to fig. 1, the present invention provides a terminal, which includes the above-mentioned ultraviolet disinfection device based on optical waveguide and a display 105, wherein the ultraviolet disinfection device is disposed on the display 105. The display 105 comprises a touch screen and a main control box, the ultraviolet light source 101 and the optical coupler 102 are arranged in the main control box, and the optical waveguide light guide film 103 extends to the touch screen from the main control box and is attached to the surface of the touch screen. In a specific use process, ultraviolet light is provided by the ultraviolet light source 101 and is coupled and guided into the optical waveguide light guide film 103 through the optical coupler 102, and when the surface of the flat light guide film layer 1032 is clean, the ultraviolet light is totally reflected in the flat light guide film layer 1032; when a user clicks the screen, dirt on the hand can be left on the surface of the flat light guide film layer 1032, the position of the dirt is equivalent to the replacement of an air layer by another medium with a larger refractive index, so that the original condition of meeting the total reflection can be changed, part of light can be transmitted from the dirt, and the position of the dirt on the touch screen is disinfected. The touch screen is widely applied to various application scenes such as mobile phones, computers, ATM terminals and the like, and becomes a center for spreading viruses due to continuous touch of hands. The ultraviolet light takes place the total reflection in optical waveguide leaded light film 103, can not take place the decay along with the distance, and the ultraviolet light only takes place the light in dirty attached position and reveals, and is less to the human injury, and the device is simple, can integrate and carry out ultraviolet disinfection, convenient to use to display device on the display device when needs.
In specific implementation, the main control box is installed on the surface of the display 105 opposite to the touch screen in a magnetic attraction, buckling or gluing mode, the main control box further comprises a current driving circuit connected with the ultraviolet light source 101, and a power supply and a control circuit connected with the current driving circuit, and ultraviolet light provided by the ultraviolet light source 101 is coupled and guided into the optical waveguide light guide film 103 through the optical coupler 102, so that the surface of the touch screen is automatically sterilized.
In specific implementation, the main control box is arranged inside the display, the main control box comprises a current driving circuit connected with the ultraviolet light source 101, and a power supply and a control circuit connected with the current driving circuit, wherein the power supply can be matched with the ultraviolet light source or share the power supply with the terminal; the current driving circuit and the control circuit can be arranged independently, and can also be integrated into the circuit of the terminal. At this time, the optical waveguide light guiding film 103 extends from a main control box inside the display 105 to the touch screen, and the ultraviolet light provided by the ultraviolet light source 101 is coupled and guided into the optical waveguide light guiding film 103 through the optical coupler 102, so that the terminal surface is automatically sterilized.
In another embodiment, the present invention provides a terminal, which includes the above ultraviolet disinfection apparatus based on optical waveguide and a key or a switch, wherein an optical waveguide light guide film in the ultraviolet disinfection apparatus is attached to the key or the switch. Similarly to the previous embodiment, the uv light source and the optical coupler in the uv disinfection apparatus are integrated with the terminal. The ultraviolet disinfection device can be effectively applied to the terminals to disinfect the keys or the switches on the terminals, the ultraviolet light is totally reflected in the optical waveguide light guide film and cannot be attenuated along with the distance, the ultraviolet light is only leaked at dirt attachment positions, the damage to a human body is small, and the ultraviolet disinfection device is simple and convenient to use.
In summary, the present invention provides an ultraviolet disinfection apparatus and a terminal based on an optical waveguide, including: the device comprises an ultraviolet light source, an optical coupler and an optical waveguide light guide film; the optical waveguide light guide film comprises a substrate layer and a flat light guide film layer from bottom to top; the refractive index of the substrate layer is smaller than that of the flat light guide film layer; the ultraviolet light source is used for providing ultraviolet light for disinfection; the optical coupler is used for receiving the ultraviolet light and coupling and guiding the ultraviolet light into the optical waveguide light guide film; the optical waveguide light directing film is transparent to the ultraviolet light and is configured to receive the ultraviolet light to disinfect a surface of the optical waveguide light directing film. The light guide film receives ultraviolet light guided by the light coupler, and when the surface of the flat light guide film layer is clean, the ultraviolet light is totally reflected in the light guide film; when dirt exists on the surface of the flat light guide film layer, light leakage occurs at the dirt position by ultraviolet light in the light guide film layer, and therefore the dirt position is disinfected. The ultraviolet light takes place the total reflection in optical waveguide leaded light film, can not take place the decay along with the distance, and the ultraviolet light only takes place the light at dirty attached position and reveals, and is less to the human injury, and the device is simple, can integrate and carry out ultraviolet disinfection, convenient to use to display device on the display device when needs.
It is to be understood that the system of the present invention is not limited to the above examples, and that modifications and variations may be made by one of ordinary skill in the art in light of the above teachings, and all such modifications and variations are intended to fall within the scope of the appended claims.
Claims (10)
1. An ultraviolet disinfection apparatus based on optical waveguides, comprising: the device comprises an ultraviolet light source, an optical coupler and an optical waveguide light guide film; the optical waveguide light guide film comprises a substrate layer and a flat light guide film layer from bottom to top; the refractive index of the substrate layer is smaller than that of the flat light guide film layer;
the ultraviolet light source is used for providing ultraviolet light for disinfection;
the optical coupler is used for receiving the ultraviolet light and coupling and guiding the ultraviolet light into the optical waveguide light guide film;
the optical waveguide light directing film is transparent to the ultraviolet light and is configured to receive the ultraviolet light to disinfect a surface of the optical waveguide light directing film.
2. The ultraviolet disinfection device based on the optical waveguide as claimed in claim 1, wherein the ultraviolet light source is an ultraviolet ray L ED lamp bead, and the wavelength of the ultraviolet light source is less than 380 nm.
3. The ultraviolet light guide-based disinfection apparatus of claim 2, wherein the optical coupler is one of a grating coupler, a prism coupler, a lens coupler, and an index-matching coupling glue.
4. The optical waveguide-based uv disinfection apparatus of claim 1, wherein the flat light directing film layer is a transparent polymer optical waveguide film material; the substrate layer is made of a transparent material with a refractive index smaller than that of the flat light film layer; and the basal layer is coated on the surface of the flat light guide film layer.
5. The optical waveguide-based uv disinfection apparatus of claim 1, wherein the substrate layer is a material that is highly transparent to uv light and yet is transparent to visible light.
6. The optical waveguide-based ultraviolet disinfection apparatus of claim 4 further comprising a current drive circuit connected to the ultraviolet light source; and the power supply and the control circuit are connected with the current driving circuit.
7. The ultraviolet light guide based disinfection apparatus of claim 1, wherein the flat light guide film layer is provided with an ultraviolet reflecting film layer on peripheral sides thereof; the ultraviolet reflecting film layer is used for reflecting the ultraviolet light.
8. A terminal comprising the ultraviolet light guide-based disinfection apparatus of any one of claims 1 to 7 and a display; the ultraviolet disinfection device is arranged on the display.
9. The terminal of claim 8, wherein the display comprises a touch screen; and an optical waveguide light guide film in the ultraviolet disinfection device is attached to the touch screen.
10. A terminal, characterized in that it comprises an ultraviolet disinfection device based on optical waveguide according to any claim 1 to 7 and a key or a switch; and an optical waveguide light guide film in the ultraviolet disinfection device is attached to the key or the switch.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| TWI786646B (en) * | 2021-05-24 | 2022-12-11 | 吳帛霖 | Optical screen key disinfection device |
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| TWI782656B (en) * | 2021-08-06 | 2022-11-01 | 艾司科技股份有限公司 | Light leakage prevention device |
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