KR102404462B1 - Two-light source XLED module for sterilization, including UV-C LED light source and near-ultraviolet VLED light source, and lighting fixture using the same - Google Patents

Abstract

The present invention is a technology for sterilizing harmful bacteria including viruses as a medical lighting technology. For this purpose, it is a controlled lighting technology that selects sterilization lighting and medical lighting. A sterilization light source and a medical light source are manufactured from the same near-ultraviolet LED chip. A two-light source XLED-based sterilization lighting package with each function is applied to this lighting technology. Alternating lighting can be operated as needed, including controlled lighting technology, which is a technology to cross-actuate it.

Description

Two-light source XLED module for sterilization, including UV-C LED light source and near-ultraviolet VLED light source, and lighting fixtures using the same}

The present invention is a two-light XLED module for sterilization including an ultraviolet-C LED light source and a near-ultraviolet VLED light source, and a lighting device using the same. It is related to lighting fixtures using XLED, two light sources of ultraviolet-C for sterilization and purple energy.

As a medical light source, the light of deep ultraviolet (Far-UV) or ultraviolet-C (UV-C) can effectively eradicate viruses, bacteria or bacteria. Therefore, using such high energy deep ultraviolet or ultraviolet-C can eradicate harmful viruses that are currently suffering mankind, so it becomes a very useful light source. For this reason, UV-C light sources are widely used as medical products, and the demand for medical light sources is rapidly increasing with the outbreak of a new virus. However, the currently commercialized UV-C light source is a low-pressure mercury lamp that requires high voltage discharge, contains harmful mercury, and is a vacuum tube product finished with a quartz glass tube, so there are many restrictions on use. Accordingly, we are looking for alternative light sources that can overcome the limitations of low-pressure-mercury lamps.

As an alternative light source, an ultraviolet LED light source is attracting attention. However, the efficiency of the UV LED light source is only 5 to 10% of that of the general lighting LED light source. Due to the limitations of the UV LED light source technology, the current level of UV LED light source technology is still in the research and development stage. To overcome this, global companies are turning their eyes to the development of a purple LED light source that has a sterilization power similar to UV light. In other words, although it is harmless to the human body, the solution is being searched for in a purple light emitting LED in the 400-420 nm region that has sterilizing power.

On the other hand, when high energy ultraviolet rays are applied for medical purposes, they can not only eradicate viruses and bacteria, but also damage humans and surrounding living things. Therefore, it is an urgent reality to develop a new medical lighting technology that is harmless to the human body and can selectively destroy viruses or bacteria at the same time.

Currently, high-color rendering general lighting using various near-ultraviolet rays is known, but in this case, a deep blue light source of 415 nm is used instead of a 405 nm near-UV light source, and the sterilization effect is insignificant. Currently, there is no known development of a sterilization lighting device using a 405nm near-ultraviolet light-emitting LED package as a 2 light source module for sterilization. However, only a high-color rendering package technology using a 405 nm or 415 nm LED light source in the near-ultraviolet region is known.

PCT Patent Publication WO2015030276A1 PCT Patent Publication WO2015072599A1 European Union Registered Patent Publication EP3035395A1

In order to solve the above problems, the present invention is to apply a VLED package that emits light in the near-ultraviolet region, and to maximize the sterilization light efficiency by applying it to a control lighting technology between a two-light source XLED module and an SLED.

The present invention provides a two-light source XLED module for sterilization comprising an ultraviolet-C LED light source and a near-ultraviolet VLED light source.

Also preferably, the near-ultraviolet VLED light source may be an ultraviolet-A VLED light source or an ultraviolet-B VLED light source.

Also preferably, the ratio between the UV-C LED light source and the near-UV VLED light source may be 10:10 to 10:1.

Also preferably, the near-ultraviolet VLED light source may have a wavelength band of 405 nm, and a half width may be less than or equal to 30 nm.

In addition, the present invention can provide a lighting device including the two light source XLED module for sterilization and the SLED module for general lighting.

Also preferably, the SLED module may have a color rendering index greater than 99.

In addition, preferably, the XLED module and the SLED module can be alternately switched by a motion sensor.

Also preferably, the luminaire can be sterilized in a group-controlled lighting or zone-controlled lighting mode.

The two-light source XLED lighting technology according to the present invention is a composite lighting combined with a general lighting SLED capable of ‘on-off’, so sterilization is carried out in unmanned conditions, and the sterilization target is very wide. In addition, since the XLED-based sterilization control lighting for high-performance sterilization is switched between XLED and SLED by the motion sensor, it can be safely operated during UV sterilization.

1 is a schematic diagram of XLED and SLED alternating lighting technology composed of two light sources UV-C and VLED for ultra-high-speed sterilization.
2 is a diagram showing a package of alternating lighting between an ultra-high color rendering SLED and a 2-light source XLED for ultra-high-speed sterilization.
3 is a view showing an ultra-high color rendering SLED prototype luminaire applied to controlled lighting technology.
4 is a view showing a two-light source XLED prototype luminaire, which is a configuration of ultra-high-speed sterilization lighting applied to controlled lighting technology.
5 is a view showing the luminescence characteristics, sterilization power, and spectrum of three types (SLED, VLED, UV-C) LED packages and 2-light source XLED modules applied to controlled lighting technology.
6 is a view showing a range that can be processed by one downlight or the like when the two-light source XLED sterilization light is operated.

In the present invention, the goal of this patent was set to secure the process advantage and economic feasibility in the application of alternating lighting technology between the 2 light source XLED for ultra-high speed sterilization and the ultra-high color rendering SLED. And a method of achieving them will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments aim at the disclosure of the present invention as a priority, and are common in the technical field to which the present invention pertains. Clearly inform those with knowledge of the scope of the present invention to make it clear that this technology is not a conventional LED package application technology of a conventional concept. That is, the performance as a health lamp with improved biorhythm and sterilization is successfully guaranteed only by the specially manufactured XLED-SLED alternating lighting technology. Modular control technology to implement sterilization and health promotion functions is covered. As a result, XLED-SLED alternating lighting technology can be used for medical lighting. The technology contained therein is practiced in this patent.

1 is a schematic diagram of XLED and SLED alternating lighting technology composed of two light sources UV-C and VLED for ultra-high-speed sterilization. Referring to FIG. 1 , two light sources composed of a sterilization light source and a high-efficiency light source are manufactured from UV-C and purple LED chips. UV-C at 280 nm determines the sterilization, and the purple light source at 405 nm increases the light efficiency of sterilization lighting. These two light sources are absolutely essential for high-efficiency sterilization lighting. This is called XLED (Exchange LED). In other words, the XLED module is based on a two-light-source hybrid package with UV-C light efficiency. As a non-sterilization mode, general lighting can be operated, and controlled lighting technology, a technology to cross-actuate it, is included.

If it is determined that the efficiency of the VLED, which is a 405 nm light source used for sterilization in two-light XLED lighting, is low, using this controlled lighting technology to the fullest, a deep ultraviolet (200 nm) or ultraviolet-C LED can be additionally used instead of the VLED.

The sterilization light efficiency comes from the near-ultraviolet VLED package with a central wavelength of 405nm, and at the same time, this package is also used for manufacturing high-color rendering SLED packages with a color rendering index exceeding 99 as lighting to match the biorhythm. For ultra-high-speed sterilization, an LED package that emits light in the deep UV and high-efficiency UV-C region uses a 2 light source XLED module. As the XLED-based sterilization control lighting for high-performance sterilization is converted into XLED-SLED by a motion sensor, it can be safely operated during UV sterilization.

The present invention is a technology for increasing the light efficiency of UV-C LEDs and utilizes purple LEDs. That is, by combining two light sources of 280 nm and 405 nm, the sterilization lighting efficiency is increased. It is a hybrid light source technology that enhances sterilization by compensating for the limitations of UV-C LED with a high-efficiency purple LED light source. In the non-sterilization mode, an additional light source capable of the general lighting function is in charge, and the basic variable control technology is that the sterilization lighting and the general lighting operate alternately.

The present invention targets two light sources emitting light in the range of 400 to 450 nm, which is ultraviolet-C and ultraviolet region. That is, for this technology development, it is essential to develop an LED package that generates near-ultraviolet light with high efficiency. That is, XLED is composed of UV-C LED and VLED (Violet LED), and the two light sources enhance the sterilization power by increasing the light efficiency of VLED.

The UV-C LED and VLED of the XLED may have a light source ratio of 10:10 to 10:1, and the total amount of sterilization light and sterilization performance are effective within the above range.

The target of alternating lighting is VLED-based high color rendering general lighting. In other words, the LED base package that produces a high-color rendering LED package when operated as a general light in turn is a VLED. The technology to produce VLED, a 405nm LED package for sterilization and SLED (Sunlight LED), a high color rendering package, is applied from the same 400~450nm LED chip, and it is used as a lighting source for each purpose for sterilization and general lighting. In other words, it constitutes alternating lighting between the two-light sterilization lighting of XLED and the general lighting consisting of the SLED light source. In everyday cases, the SLED lighting that matches the biological rhythm works by reproducing the ultra-high color rendering light in the switch-on mode. During sterilization, it is switched to Switch-Off mode under the condition that there is no person, and the 2 light source sterilization light of the XLED module is operated.

The general lighting composition consists of a VLED chip and a high-color rendering SLED package manufacturing technology using inorganic light conversion materials of red, green, and blue based on it. It is a technology that uses a VLED-based high-color rendering SLED package to evenly generate high-color rendering red, green, and blue light from the near-ultraviolet region. The VLED package to be applied to this technology becomes the center of high-efficiency emission of near-ultraviolet rays with a central peak of 405 nm effective for sterilization. The present invention supplements the very low luminescence characteristics of the ultraviolet-C wavelength by applying a VLED package that effectively generates near-ultraviolet rays in terms of sterilization lighting.

The highest performance of XLED module-based sterilization control lighting can be expected by ‘turning on-off’ using a high-color rendering SLED package using near-UV-sensitive red, green, and blue light conversion inorganic materials.

The present invention uses a 405nm VLED package as the main light source. When this VLED package is applied, it is possible to secure a luminous flux with sufficient energy density for sterilization, and at the same time, by using the same VLED package, it is possible to produce a high-color SLED package by maximizing the energy transfer to red, green, and blue. That is, controlled lighting technology using a two-light source XLED module can be applied for medical purposes.

The application of the SLED-, XLED-, and VLED-package according to the present invention will be described in detail with reference to FIG. 2 . 2 is a diagram illustrating a selective 'on-off' control between a high-color rendering SLED package having a color rendering index of more than 99 for medical application according to an embodiment of the present invention and an XLED module to which a package of 280 nm and 405 nm center wavelength is applied. Shows the mechanism of lighting technology. The sterilization effect is approximately 405 nm-centered emission spectrum, but it is not necessarily limited to the 405 nm-centered emission spectrum, and it is possible to increase the ultraviolet fraction in the two-light source XLED module according to the UV-C LED package combination, which will increase the additional sterilization power, which will be described later. Of course, it can be selectively employed in the known two-light source XLED alternating lighting technology.

In addition, it is composed of a package of alternating lighting between an ultra-high color rendering SLED and a two-light source XLED for ultra-high-speed sterilization, and using this package, a medical lighting capable of alternating lighting is completed. SLED is an ultra-high color rendering general lighting with a CRI approaching 99 based on VLED, and the two-light XLED module consists of a 280 nm UV-C light source for sterilization and a 405 nm near-UV light source.

3 is a super high color rendering SLED prototype luminaire applied to controlled lighting technology, and FIG. 4 is a diagram illustrating a two-light source XLED prototype luminaire that is a super-high-speed sterilization lighting configuration applied to controlled lighting technology.

3 and 4, each prototype luminaire was manufactured as a downlight, and in particular, the LED module is composed of a 280 nm ultraviolet-C light source for sterilization and a 405 nm near-ultraviolet light source. At this time, XLED Optical Power = 21mW x 8 + 34mW x 8, sterilization distance = 2.5 m, sterilization time = 8 hours (28,800 seconds).

Hereinafter, a specific experimental example of the two light source XLED-SLED alternating lighting of the present invention will be described.

a) First, the ultra-high color rendering general lighting SLED design proceeds, and the near-ultraviolet chip to be applied to this technology is included in the VLED package as a 405 nm centered light emitting light source. At this time, the full width at half maximum is included in this technology in the range of 30 nm.

b) Subsequently, an SLED package having a color rendering index greater than 99 to be applied to the present invention is produced.

c) Next, systematize the optical properties to be applied to the XLED sterilization lighting. It is converted to Switch-Off mode under the condition that there is no person during sterilization, and the VLED lighting is operated and the LED module to implement 2-light XLED sterilization is driven. Using this two-light source UV-C and VLED package, comparatively evaluated luminaire prototypes are produced.

d) Finally, the 2-light XLED module-based sterilization control lighting for ultra-high-speed sterilization is designed to operate safely during UV sterilization because the switching between XLED and SLED is made by the motion sensor. In particular, when the damage caused by bacteria is extensive, the comprehensive zone-controlled lighting technology, which is a concept higher than the group-controlled lighting technology, was applied rather than the individual controlled lighting technology.

5 is a view showing the luminescence characteristics, sterilization power, and spectrum of three types (SLED, VLED, UV-C) LED packages and two light source XLED modules applied to controlled lighting technology.

Referring to FIG. 5 , it can be confirmed that the two-light source XLED to which SLED, VLED and UV-C LED are applied has excellent effects such as CCT and sterilization power.

6 is a view showing a range that can be processed by one downlight or the like when the two-light source XLED sterilization light is operated.

Referring to FIG. 6 , when the two-light source XLED sterilization lighting is operated, the range that one downlight can process is approximately 73.96 m ² . Roughly in the case of a coronavirus, it is sterilized when irradiated with energy in an energy range of 15-20 mJ/cm ² .

Claims (8)

delete delete delete delete 2 light source XLED module for sterilization comprising a UV-C LED light source in the 280 nm wavelength band, and a UV-A VLED light source in the 405 nm wavelength band with a half width of 30 nm or less; and
Lighting equipment including; SLED module for general lighting with color rendering index higher than 99 based on VLED chip. delete 6. The method of claim 5,
Lighting equipment, characterized in that the XLED module and the SLED module are switched to each other by a motion sensor. 6. The method of claim 5,
The lighting fixtures are sterilized in a group-controlled lighting or zone-controlled lighting scheme.

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