JP2006244910A - Near-infrared radiation fluorescent lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a near-infrared radiation fluorescent lamp not irradiating red colored light while irradiating near-infrared-ray capable of preventing paddy rice from delay of coming into ear. <P>SOLUTION: Near-infrared-ray can be irradiated by applying a paint containing iron-activated lithium aluminate as a main component on the inner face of the fluorescent lamp, by the above, emission of red colored light can be prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fluorescent lamp capable of irradiating near-infrared light, and more particularly to a fluorescent lamp capable of preventing heading delay of paddy rice.

  In Japan, a lot of paddy rice is grown. Currently, paddy rice cultivation is an important food not only in Japan but also worldwide. Conventionally, variety improvement and various methods have been disclosed for the promotion of rice seedling growth or disease control.

  For example, Patent Document 1 discloses a paddy rice disease control method. In this paddy rice disease control method, a sheet-like sterilized molded product composed of a bactericidal compound and a water-absorbing polymer is laid on the bottom of the seedling box to elute the bactericidal compound from the molded product, The disease of rice after transplanting can be controlled.

Japanese Patent Laid-Open No. 7-242504

  However, in recent years, it has been clarified that the heading efficiency of paddy rice is extremely low in paddy rice areas existing around convenience stores or highways. These paddy rices were not in a disease state, but were simply not heading or were delayed in heading and not fully fruited.

  The objective of this invention is providing the near-infrared fluorescent lamp which does not irradiate red light, irradiating the near-infrared light which can prevent the heading delay of paddy rice.

  Another object of the present invention is to provide a near-infrared fluorescent lamp capable of irradiating near-infrared light that can prevent heading delay of paddy rice and irradiating substantially white light.

Means and effects for solving the problems

  The inventor of the present application has found that heading of paddy rice is delayed by red light included in illumination at convenience stores or highways, and has created a fluorescent lamp that does not emit red light. It was also found that growth was promoted by irradiating paddy rice with delayed heading with near-infrared light.

(1)
The near-infrared light fluorescent lamp according to the first invention applies at least near-infrared light by applying a paint containing a near-infrared light emitting phosphor, a blue light-emitting phosphor and a green light-emitting phosphor as a main component of the inner surface paint. Irradiates and shields red light.

  In the near-infrared light fluorescent lamp according to the first invention, at least near-infrared light is irradiated by applying a paint containing a near-infrared light emitting phosphor, a blue light-emitting phosphor and a green light-emitting phosphor on the inner surface of the fluorescent lamp, and Red light can be blocked.

  In this case, it is possible to irradiate the paddy rice with delayed heading with near infrared light. That is, by irradiating paddy rice with near infrared rays, phytochrome, which is a protein pigment contained in the flowering hormone florigen of paddy rice, can be changed, and the heading delay of paddy rice can be prevented by this change in phytochrome. Moreover, since red light is shielded, the heading delay of paddy rice can be prevented.

(2)
The near-infrared fluorescent lamp preferably emits light having a wavelength of 400 nm to 500 nm, light having a wavelength of 500 nm to 550 nm, and light having a wavelength of 700 nm to 850 nm.

  In this case, so-called blue light having a wavelength of 400 nm or more and 500 nm or less, green light having a wavelength of 500 nm or more and 550 nm or less, and near infrared light having a wavelength of 700 nm or more and 850 nm or less can be irradiated. Therefore, the heading delay of paddy rice can be suitably prevented.

(3)
The near-infrared fluorescent lamp may have an output wavelength peak near a wavelength of 430 nm, an output wavelength peak near a wavelength of 530 nm, and an output wavelength peak near a wavelength of 745 nm.

  In this case, a so-called blue light wavelength peak in the vicinity of a wavelength of 430 nm, a so-called green light wavelength peak in the vicinity of a wavelength of 530 nm, and a near-infrared light wavelength peak in the vicinity of a wavelength of 745 nm can be irradiated. Therefore, the heading delay of paddy rice can be suitably prevented.

(4)
The near-infrared fluorescent lamp may output almost white light. In this case, since almost white light can be irradiated, a near-infrared fluorescent lamp can be used like other lighting equipment. That is, almost white light can be output, so that the heading delay of paddy rice can be prevented by easily replacing with a conventional white light fluorescent lamp.

  Embodiments according to the present invention will be described below.

(Embodiment)
FIG. 1 is a schematic diagram showing the structure of a fluorescent lamp 100 according to an embodiment of the present invention.
As shown in FIG. 1, the fluorescent lamp 100 includes a rubber cap 10, a fluorescent member 20, an outer cylinder 30, a reflecting plate 40, insulating paper 50, and a power cord 60.

  An outer cylinder 30 is provided for the fluorescent member 20 extending in the longitudinal direction. A reflector 40 is provided between the outer cylinder 30 and the fluorescent member 20. Insulating 50 is wound around the outer surface of the outer cylinder 30, and rubber caps 10 are provided at both ends thereof. A power cord for supplying power to the fluorescent member 20 is connected to one of the rubber caps 10.

  Next, FIG. 2 is a schematic diagram for explaining the internal structure of the fluorescent member 20 of FIG. 2A shows the structure in the vicinity of the electrode of the fluorescent member 20, and FIG. 2B shows the structure of the light emitting portion of the fluorescent member 20. As shown in FIG.

  As shown in FIG. 2A, an electrode 22 is provided at the end of the fluorescent member 20. Electric power supplied from this electrode is applied to the filament 26. Further, as shown in FIG. 2A, the inside of the fluorescent member 20 is filled with vaporized mercury electrons. A fluorescent material 25 is applied to the inner wall of the fluorescent member 20.

  Here, as shown in FIG. 2B, when a current is supplied to the filaments 26 at both ends, the filaments 26 are heated and thermoelectrons 27 are emitted. The thermoelectrons 27 jump out toward the opposite electrode 22 and collide with the mercury electrons 28 at this time. By this collision, ultraviolet rays are emitted from the mercury electrons 28 and discharge is started.

The ultraviolet light emitted from the mercury electrons 28 strikes the fluorescent material 25 and changes its wavelength. In the present embodiment, (SrCaBaMg) ₅ (PO ₄ ) ₃ Cl: Eu or BaMg ₂ Al ₅ O ₂₇ is used as a blue light emitting phosphor in the fluorescent material 25 for irradiating light with a wavelength of 400 nm to 500 nm: Eu (abbreviation BAM: divalent europium activated barium magnesium aluminate) is preferably used.

The blue light emitting phosphor is not limited to these, and any other blue light emitting phosphor, for example, divalent europium activated strontium aluminate (abbreviated as SAE), calcium tungstate, divalent europium activated strontium calcium. chloro _{apatite, 3Sr 2 (PO 4) 2} · CaCl 2: Eu 2+ (2 bivalent active calcium chloride with europium, strontium phosphate) may be used or a divalent europium activated calcium chloro port rates.

Further, as a green light emitting phosphor in the fluorescent material 25 for irradiating light with a wavelength of 500 nm or more and 550 nm or less, LaPO ₄ : Ce, Tb (abbreviation: LAP: cerium / terbium activated lanthanum phosphate) or CeMgAlO: Tb ( The abbreviation CAT: terbium activated cerium aluminate, magnesium) is preferably used. As the green fluorescent emitters, but are not limited to, any other green-emitting phosphor, for _{example, Y 2 SiO 5: Ce,} Tb may be used (TV um cerium activated yttrium silicate) and the like .

Further, it is preferable to use LiAlO ₂ : Fe (abbreviation ALF; iron-activated lithium aluminate) or the like as the near-infrared light emitting phosphor in the fluorescent material 25 for irradiating light with a wavelength of 700 nm to 850 nm. A part of Li in ALF may be substituted with Na, K, or an alkali metal, and a part of Al in ALF may be substituted with any trivalent element of B, Ga, In, and Tl. May be.

The fluorescent material 25 includes manganese-activated fluorogermanic acid, magnesium, Y ₂ O ₃ : Eu (abbreviated as YOX: trivalent europium-activated yttrium oxide), trivalent europium-activated vanadic acid, which are red-emitting phosphors. Thorium, trivalent europium activated yttrium vanadate phosphate, etc. are not included.

In this embodiment, 3Sr3 (PO ₄ ) ₂ CaCl ₂ : Eu ²⁺ is used for irradiating light with a wavelength of 400 nm or more and 500 nm or less, and Y ₂ SiO ₅ for irradiating light with a wavelength of 500 nm or more and 550 nm or less. : Ce, Tb is used, and LiAlO ₂ : Fe is used for irradiation with light having a wavelength of 700 nm or more and 850 nm or less. Therefore, the fluorescent material 25 is mainly a mixture of 3Sr3 (PO ₄ ) ₂ CaCl ₂ : Eu ²⁺ , Y ₂ SiO ₅ : Ce, Tb and LiAlO ₂ : Fe. Thereby, red light having a wavelength of 640 nm or more and 700 nm or less can be shielded by the fluorescent material 25.

  As described above, by using the fluorescent lamp 100 according to the present embodiment, it is possible to irradiate paddy rice with delayed heading with near infrared light. In other words, phytochrome, which is a protein pigment contained in the flowering hormone florigen of paddy rice, can be changed by irradiating paddy rice with delayed heading with near-infrared light, and this change in phytochrome prevents the heading delay of paddy rice. Can do. And since red light is shielded, the heading delay of paddy rice can be prevented.

  Moreover, so-called blue light having a wavelength of 400 nm to 500 nm, green light having a wavelength of 500 nm to 550 nm, and near infrared light having a wavelength of 700 nm to 850 nm can be irradiated, and red light that causes a heading delay of paddy rice is emitted. Since irradiation is not performed, the heading delay of paddy rice can be suitably prevented.

  Furthermore, since the fluorescent lamp 100 according to the present invention can emit almost white light, a near-infrared fluorescent lamp can be used in the same manner as other lighting devices. That is, almost white light can be output, so that the heading delay of paddy rice can be prevented by easily replacing with a conventional white light fluorescent lamp.

In the present embodiment, the fluorescent material 25 corresponds to the inner surface paint, LiAlO ₂ corresponds to the near-infrared light emitting phosphor, and light having a wavelength of 700 nm to 850 nm corresponds to near-infrared light, and the wavelength is 640 nm to 700 nm. The following light corresponds to red light, and the fluorescent lamp 100 and / or the fluorescent member 20 corresponds to a near-infrared light fluorescent lamp.

  Although the present invention has been described in the above-described preferred embodiment, the present invention is not limited thereto. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

(Example)
A fluorescent lamp 100 was actually manufactured using the fluorescent material 25, and the relationship between the wavelength and intensity of light was measured. FIG. 3 is a diagram illustrating measurement results of the wavelength and intensity of light emitted from the fluorescent lamp 100 including the fluorescent member 20.

  As shown in FIG. 3, light with a wavelength of 400 nm to 500 nm, light with a wavelength of 500 nm to 550 nm, and light with a wavelength of 700 nm to 850 nm are mainly irradiated.

  Further, it has an output wavelength peak in the vicinity of a wavelength of 430 nm, an output wavelength peak in the vicinity of a wavelength of 530 nm, and an output wavelength peak in the vicinity of a wavelength of 745 nm. Furthermore, in the so-called red light having a wavelength of 640 nm or more and 700 nm or less, the intensity of the light is scarce.

  Therefore, in the fluorescent member 20 according to the present invention, it is possible to irradiate near-infrared light that has a positive effect on preventing heading delay of paddy rice without irradiating red light that adversely affects the paddy rice. Moreover, since not only near infrared rays but also so-called green light and blue light can be irradiated, light close to white can be emitted from the fluorescent lamp 100.

The schematic diagram which shows the structure of the fluorescent lamp which concerns on one embodiment of this invention Schematic diagram for explaining the internal structure of the fluorescent member of FIG. The figure which shows the wavelength and intensity | strength of the light emitted from the fluorescent lamp containing a fluorescent member

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Fluorescent lamp 10 Rubber cap 20 Fluorescent member 30 Outer cylinder 40 Reflector 50 Insulating paper 60 Power cord 22 Electrode 26 Filament 25 Fluorescent material 27 Thermoelectron 28 Mercury electron

Claims (4)

  It is characterized in that at least near-infrared light is irradiated and red light is shielded by applying a paint containing a near-infrared light-emitting phosphor, a blue light-emitting phosphor and a green light-emitting phosphor as a main component of the inner surface paint. Near infrared fluorescent lamp. Light with a wavelength of 400 nm to 500 nm,
Light having a wavelength of 500 nm to 550 nm,
The near-infrared fluorescent lamp according to claim 1, wherein the near-infrared fluorescent lamp is irradiated with light having a wavelength of 700 nm to 850 nm. It has an output wavelength peak in the vicinity of a wavelength of 430 nm,
It has an output wavelength peak in the vicinity of a wavelength of 530 nm,
The near-infrared fluorescent lamp according to claim 1, wherein the near-infrared fluorescent lamp has an output wavelength peak in the vicinity of a wavelength of 745 nm. The near-infrared fluorescent lamp according to any one of claims 1 to 3, capable of outputting substantially white light.

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