JP6905656B1 - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which improves not only ultraviolet light but also white light when inactivating a pathogen by light irradiation using a lighting device. A design that efficiently and effectively provides both white light for room lighting and, if necessary, ultraviolet light that has a bactericidal action on the contact surface will be detailed. This is achieved by managing the sides of the light guide with white light and UV-LED (deep ultraviolet light source) mounting for full energy efficiency, cost, and bactericidal effects. [Selection diagram] Fig. 6

Description

The present invention relates to a lighting device.

In order to reduce infection with pathogens such as the new coronavirus, it is necessary to prophylactically disinfect the surfaces of the elements that make up the space. Here, inactivation of pathogens by light irradiation using a lighting device is useful as a means that can be introduced into a living environment.

The invention described in Patent Document 1 is a light emitting device, which comprises a mounting substrate on which each of ultraviolet, blue, green, and red LED elements is mounted and made of an inorganic material, and a housing that accommodates the mounting substrate and is made of an inorganic material. It is a light emitting device that includes a SiC fluorescent plate excited by light emitted from an ultraviolet LED element, and has improved heat resistance by using each member of the light emitting device as an inorganic material.

However, it can be understood that the invention described in Patent Document 1 emits not only ultraviolet light but also white light, and there is room for improvement from the viewpoint of realizing disinfection of the surface of the elements constituting the space.

Japanese Unexamined Patent Publication No. 2010-21202

In order to solve the above problems, the present invention makes it a problem to be solved to provide a novel technique for a lighting device.

In order to solve the above problems, the present invention is a lighting device including a housing, and the housing includes a deep ultraviolet light source and a white light source.

In a preferred embodiment of the invention, the luminaire is accompanied by a downlight form factor.

In a preferred embodiment of the invention, the luminaire is accompanied by a fluorescent tube form factor.

In a preferred embodiment of the invention, the luminaire comes with a screw-based bulb form factor.

In a preferred embodiment of the invention, the luminaire is accompanied by a panel light form factor.

In order to solve the above problems, the present invention is a lighting device including a deep ultraviolet light source, and the deep ultraviolet light source exposes a region of ± 70 degrees with respect to the normal axis of the deep ultraviolet light source.

In a preferred embodiment of the present invention, the illuminator further comprises an edge, which blocks deep ultraviolet light in regions other than the region.

In order to solve the above problems, the present invention is a lighting device, which includes a deep ultraviolet light source and optical features, and the optical features disperse the deep ultraviolet light emitted from the deep ultraviolet light source.

In a preferred embodiment of the present invention, the optical feature is a cover glass that is convexly molded toward the deep ultraviolet light source side.

In a preferred embodiment of the present invention, the optical feature is a cover glass having a radius of less than 20 mm on the deep ultraviolet light source side.

In order to solve the above problems, the present invention is a lighting device including an ultraviolet light source and a white light source, and the diffusion structure of the ultraviolet light source and the diffusion structure of the white light source are separated.

In a preferred embodiment of the present invention, the ultraviolet light source is surrounded by a planar white light emitting structure including the white light source.

In a preferred embodiment of the present invention, the ultraviolet light source is provided at the extreme end of the illuminating device.

According to the present invention, it is possible to provide a novel technique for a lighting device.

It is a figure facing the room of the UVC downlight which is the lighting device which concerns on one Embodiment. It is a side view of the UVC downlight which is a lighting device which concerns on one Embodiment. It is a radiation pattern of a UVC LED which is a lighting device which concerns on one Embodiment. It is a side view of the UVC section of the downlight which is the illuminating device which concerns on one Embodiment. It is an enlarged side view of the UVC section of the downlight which is the illuminating device which concerns on one Embodiment. It is a side view of the UVC light bulb format which is a lighting device which concerns on one Embodiment. It is a figure about the panel type lighting apparatus which is the lighting apparatus which concerns on one Embodiment. It is a figure about the panel type lighting apparatus which is the lighting apparatus which concerns on one Embodiment.

The lighting device according to an embodiment includes a housing. The housing includes a deep ultraviolet light source 006 and a white light source 003.

The disclosure of the present invention details a design that efficiently and effectively provides both white light for room illumination and, if necessary, ultraviolet light that has a bactericidal action on the contact surface. This is achieved by managing the sides of the light guide with white light and UV-LED mounting for full energy efficiency, cost and bactericidal effects.

One of the form factors of the combination fixture is the downlight. This form factor is installed on the ceiling of a room or area and is about the same height as the ceiling surface. This type of combination fixture irradiates UV for sterilization in a very compact way, and if LED downlights for white lighting are already installed as room lighting, UV function can be installed without additional equipment. It can be done and the cost can be saved. Note that the attachment of a form factor corresponds to the form factor.

As illustrated in FIG. 1, a room-facing view of a UVC downlight shows a general layout of an embodiment of the present invention. In this layout, the UV emitting part of the fixture is located in the center of the layout. The white light irradiator is arranged in a ring around the UV emitting portion. The decorative bezel 001 outside the white light emitting portion has the important purpose of mounting the fixture on the ceiling structure.

In this embodiment, the downlight fixture can be fixed in place by a gypsum board that includes the main structure of the ceiling cited as an example, on which this lighting is mounted. The downlight can be secured by a downlight, a fastener (not shown) placed relative to this bezel structure.

The next structure found inside the bezel is the heat sink edge 002, which is part of the body of the downlight. It has the dual purpose of providing mechanical support for the structure and allowing heat to escape from the white light emitting LED (corresponding to the white light source 003). The next component of the internal structure is a white LED. These are inwardly ring-shaped to optically work with the diffuser structure normally incorporated into downlight designs. LEDs facing the lighting area or room may be used for the downlight. In this case, although the design is slightly different, it is also possible to irradiate the light directly from the LED through the diffuser. Here, the white light source 003 may be planar and may be included in the white light emitting structure.

The next structure inside it is a white light reflecting ring 004. This ring has multiple designs. The simplest design is the structure of the next item that the white light collides with. It can be understood that if the white light enters the UV generation region uncontrolled, it will probably disappear and the purpose of the illumination will not be achieved, resulting in the worst efficiency. A ring of diffusive white material such as matte coating or white paper can also be adopted as the structure.

As illustrated in FIG. 2, there are four examples of reflective rings. Example 1 is a triangle that reflects some of the white light into the room and the rest towards the diffuse surface on the back plate of the downlight. In Example 2, much of the colliding white light is reflected upwards toward the room. Example 3 is similar to Example 2, but at a shallower angle. Example 4 is a structure with multiple triangles or indentations that subdivides the pattern of reflected light, which helps to generate the desired lighting pattern on the surface of the room to which the white light illumination is radiated from this downlight fixture.

White light LEDs that emit UV light and the entire internal space may be filled with white light transmissive "window" glass polymers or other materials, leaving no space. A possible embodiment expected here is from a space mostly filled with air to a side surface completely enclosed in polymer or glass.

Moving further inward towards the center, a copper printed circuit board (PCB) (corresponding to PCB board 005) is located throughout the central portion of this structure. This PCB is equipped with a UVC LED (corresponding to a deep ultraviolet light source 006). The PCB also contains the electrical connections that form a series of LEDs, the mechanical support of the LEDs (provided by the back plate 008 for mechanical support), and part of the system for heat removal generated by the LEDs3. There are two functions. A large thermal heat sink 009 is attached to the back side of the PCB 005. The white light LED may use an aluminum heatsink or a flex circuit mounted on a steel or aluminum heatsink body. At this time, copper PCBs are a requirement for UVC LEDs available. As the development of LEDs progresses, it may become possible to use the same heat sink method for UVCs as for white light LEDs. The UVC downlight illustrated in FIG. 1 further includes a multi-layered planar diffuse reflection plate (corresponding to a diffuse structure 007).

Like the UVC LED emission pattern illustrated in Figure 3, the UVC LEDs in this example radiate primarily in the angular range of -70 degrees to 70 degrees normal (0 degrees radiates from the surface). Represents a normal). In other words, since the deep ultraviolet light source 006 exposes a region of ± 70 degrees with respect to the normal axis of the deep ultraviolet light source 006, it is considered desirable to capture the emission of almost the entire range or the entire range. Here, the synchrotron radiation exceeding the angle range is blocked by the edge portion.

UVC LEDs are expensive and it would be desirable to make full use of this valuable emission as much as possible. For this reason, the optical path in this design is substantially separated from the control of UV emission from the control of white light emission.

As illustrated in FIG. 4, another possible embodiment of the UV emitting portion of the downlight is shown. The cover glass (corresponding to optical feature 010) is not flat on the side facing the LED. The UV LED side of the cover glass has a convex shape, and these convex shapes refract the light emitted from the UV LED, effectively narrowing the radiation angle from the downlight and exposing it to ultraviolet rays. It is aimed at the surface of the desired room. The convex structure of the cover glass surface facing the LED tends to narrow the angle of radiation, covering a smaller room area and using more equipment with high intensity UV treatment per area section of the ceiling. Can be supported.

This also expands the range of structures that can be created. Light is diffused on a rough surface with irregularities. The concave structure of the cover glass surface facing the LED tends to increase the angle of radiation and can be used over a wider area, resulting in fewer fixtures and lower UV treatment intensity per area section of the ceiling.

As illustrated in Figure 5, the UVC section of the downlight magnifies the change in angle of the light beam emitted by the LED. This corresponds to an example of increasing the intensity of ultraviolet radiation under a downlight fixture. Further, in order to facilitate cleaning of the light emitting portion, it can be understood that it is very desirable to flatten the surfaces of both the white light emitting portion and the UV light emitting portion of the instrument.

Another possible form factor for combinatorial fixtures is a light bulb with screws. As this form factor is the most frequently used in the world, it offers great potential for UV sterilization as an alternative to existing buildings. This type of combination fixture irradiates sterilizing UV light in a compact way. Since the screw socket already exists, the installation cost can be reduced.

The side view of the UVC bulb format exemplified in FIG. 6 shows a general layout of one embodiment of the present invention. In this layout, as with the downlight, the UV emitting part of the placed fixture is in the center of the layout. The white light emitting device is arranged in a ring around the ultraviolet emitting portion. There is a heat sink on the outside of this white light emitting part, and heat is compactly removed from the white light emitting part of the form factor of this light bulb. Here, the light bulb is, for example, a screw-based light bulb.

The central UV emitting part of the bulb is designed in a manner very similar to a downlight fixture. However, the size of the annular portion dedicated to white light emission is probably about an order of magnitude, and its width is very small, so the design of the inner reflective ring is important. More light reaches this inner ring than the downlight design. This inner ring can come with all the same design options as the downlight design, so how to add additional options such as various convex and concave recesses and / or rough surfaces to the reflective surface of the inner reflective ring. There is.

The panel format is desirable because many buildings are dedicated to panels. These luminaires, previously all offered as fluorescent fixtures, are now being re-installed in the form of LED luminaires.

A square UV LED emitting section (equivalent to deep UV light source 006) to provide the user with the best white light experience and to enable the highest efficiency of both UV and white light emitted from each LED. ) Pattern is used. The panel-type room-facing view illustrated in FIG. 7 shows the layout of an exemplary embodiment of a panel light. The existing lighting structure used to radiate white light is largely unaffected by the addition of this UV radiation section. This is due to the size of this lighting format. Here, a white light emission section 011 is provided, a white light down reflector outer shell 012, and an upward emission outer shell 013 to the LED reflector.

Existing panels have a variety of structures designed to reduce costs and improve the uniformity and efficiency of emitting white light. One of the most popular is a structure in which a white light LED that radiates upward is made into a reflector structure to reflect light downward. Often provided as a set with a sheet of baffle or polymeric material with a structure that further diffuses and smoothes the emission of white light.

The panel lights in the present disclosure have two UV emitting sections arranged at different ends of the panel lights. It can also be placed at the very end of the fixture.

In order to secure the illumination range, the UV section arrangement in this panel equipment is one with one UV section on the panel, two with two UV sections as shown in Fig. 7, and four at the corner or outline of the panel. There are multiple options, as well as those arranged above. These are partially illustrated in the panel format options illustrated in FIG.

Also, the radiation pattern of the UV generation section will vary depending on the section of the panel in which it is placed. When centered on a single UV emitter, substantially square optics designed for sections with fairly uniform emissions may be used. At the four emission sections, radiation profiles are selected at the outer corners, radiation is combined, and exposure to UV light is significant in areas where the fixture is designed to cover with both UV and white light illumination. Become uniform.

Ultraviolet light can also be provided in the form of fluorescent tubes. The UV LED for disinfection is contained in the same tube as the white LED for lighting. A fluorescent tube type UVC LED is one of the possible embodiments of the present invention. The present embodiment is intended to create a tubular product that is electrically compatible with existing fluorescent fixtures in the building. The existing tube is removed and a new tube is placed in the existing instrument. The tube contains both white and UVC LEDs.

The UVC light is turned on and off via the connector on the side of the tube. In one embodiment, the connector is fitted into a cable that reaches a user-accessible safety switch along the surface of the ceiling, preferably on the opposite side of the room door, so that the UVC during equipment installation. Prevent exposure to light. Safety switches, cabling, and interlocking systems are known in the art and are not described herein.

UVC LEDs are radiated through the smallest possible window of UVC transmissive material. Materials with high UVC transmittance are somewhat costly, so it is important to minimize the amount of this material in order to provide cost-effective products.

Ultraviolet rays here are light having a wavelength shorter than that of human vision. UVC is substituted for UVA, UVB, or a specific wavelength, narrowed from 100 nm to 400 nm, further narrowed to UVC 100 nm to 280 nm, and further narrowed to 280 nm ± 10 nm.

When describing sterilization or UV, UVC light, it also includes light provided to check the cleanliness of the surface of the environment and to check for viruses and other contaminants adhering to the surface. It can also be of any wavelength desired for the required function.

It would also be beneficial to include the possibility of using mercury vapor germicidal lamps as a light source for UV light. Part of the lighting can radiate up to the UVC range and can radiate the entire range of UV light.

The term "room" as used herein is intended for use in an outdoor space with a roof and may mean a location from a building to an area or space. In outdoor spaces, sliding covers or other methods of limiting human exposure to acceptable limits may be used.

Areas such as ATMs may come with sliding doors that cover the sterilization area. An example ATM is a tube, panel or downlight that illuminates the top of the ATM downwards and sterilizes all important surfaces. It is also possible to provide a UVC reflective surface inside the panel, which is expected to improve the utilization rate of ultraviolet rays, reduce costs, and improve efficiency.

Illuminated areas are, for example, street-facing patios or restaurant sidewalks. These lights are installed to provide white light lighting where the customer needs it. If sterilization is required, safety is ensured through screens or panels as needed during UV radiation.

The design of the event space is similar. The difference from the above example is that the entrance to the site is controlled and the screen is not required. This disclosure does not claim the use of safe or anti-irradiation items.

White light here means light used for human vision. It also means lighting of any color used by human vision, or in human activity, or as lighting for robot position, navigation, or mapping of space and surroundings that is useful to humans. In some cases. This lighting can also mean command-colored lighting, such as a Philips HUE bulb. In this case, the emitted light is in the human visible range.

UVC here is ultraviolet light of the "C" wave, which is emitted from the UVC LED and has a peak emission wavelength of generally 280 nm or close to it.

001: Decorative bezel 002: Heat sink edge 003: White light source 004: White light reflection ring 005: PCB substrate 006: Deep ultraviolet light source 007: Diffusion structure 008: Back plate for mechanical support 009: Thermal heat sink 010: Optical feature 011 : White light emission section 012: White light down reflector outer shell 013: Outer shell

Claims (11)

It ’s a lighting device,
It is provided with a housing that includes a white light emitting structure including a white light source that irradiates white light and a deep ultraviolet light source that irradiates deep ultraviolet light.
The housing has a white light reflecting ring that reflects the white light in the illumination direction outside the deep ultraviolet light source .
The white light emitting structure is a planar structure surrounding the deep ultraviolet light source from the outside of the white light reflecting ring.
The white light source irradiates the white light in a direction toward the deep ultraviolet light source, which is different from the illumination direction.
The deep ultraviolet light source is arranged in the housing so as to irradiate the deep ultraviolet light in the illumination direction.
The white light reflecting ring, wherein the inside of the white light emitting structure provided so as to surround the deep ultraviolet light source, the white light from a white light source, is allowed Ru illumination device reflected in the illumination direction. The illuminating device according to claim 1, wherein the housing includes the diffusion structure of the deep ultraviolet light source and the diffusion structure of the white light source, and the diffusion structure of the deep ultraviolet light source and the diffusion structure of the white light source are separated. Lighting equipment. The illuminating device according to claim 1 or 2, wherein the deep ultraviolet light source is provided at the end of the illuminating device. The lighting device according to any one of claims 1 to 3, to which a downlight form factor is attached. The lighting device according to any one of claims 1 to 3 , to which a fluorescent tube form factor is attached. The illuminating device according to any one of claims 1 to 3 , wherein the form factor of the screw-based light bulb is attached. The lighting device according to any one of claims 1 to 3 , to which the form factor of the panel light is attached. The illuminating device according to any one of claims 1 to 7 , wherein the deep ultraviolet light source has a radiation angle of ± 70 degrees with respect to the normal axis of the deep ultraviolet light source. Exposed lighting equipment. The lighting device according to claim 8 , further comprising an edge portion, wherein the edge portion blocks deep ultraviolet light in a region other than the region. The illuminating device according to any one of claims 1 to 9 , further comprising optical features, wherein the deep ultraviolet light emitted from the deep ultraviolet light source is dispersed in the illumination direction. The illuminating device according to claim 10 , wherein the optical feature is a cover glass formed in a convex shape on the deep ultraviolet light source side.

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