JP2016126915A - Fluorescent light led lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To resolve some problems found in the conventional LED lamp that a weight of LED lamp of long straight type becomes heavy due to the fact that a configuration of arrangement of a supporting plate and a heat sink is essential in the straight pipe and it is hard to use it as a replacing product for a fluorescent lamp.SOLUTION: This invention provides a fluorescent LED lamp comprising a long glass pipe 0301 coated at its inner surface with fluorescent substance lit with ultraviolet rays and non-parallel ultraviolet LED element 0302 arranged at a lateral section of the long glass pipe with its optical axis being in non-parallel with a longitudinal central axis of the long glass pipe. Thus, even if the straight pipe is long, its weight is light, it can be used as a replaceable product for a fluorescent lamp and it becomes possible to provide a fluorescent LED lamp capable of attaining full surface light generation over 360 degrees in respect to a longitudinal central axis of the straight pipe.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a fluorescent LED lamp that includes an ultraviolet LED element that generates ultraviolet rays and can obtain light emission from the entire surface of a glass tube.

  A “light emitting diode (hereinafter referred to as LED)” is an electric element that has a pn junction composed of a p-type semiconductor and an n-type semiconductor, and can emit light by applying a forward bias to the junction. is there. An LED lamp, which is an illumination that uses light emission of an LED, has an advantage that it can be used with a longer life and lower power consumption than a conventional fluorescent lamp using a filament. In recent years, LED lamps that can be directly connected to conventional fluorescent lamps have been developed and are becoming popular (see Patent Document 1).

  An LED lamp that has been conventionally developed as a substitute for a fluorescent lamp (see FIG. 1B) has a plurality of LED elements arranged at regular intervals so that the entire light emitting surface of the LED lamp emits light uniformly. A configuration in which light emission is obtained by supplying current to the LED element through a lead wire laid on a support plate is widely used.

JP 2001-351402 A JP 2004-335426 A JP 2014-164976 A

  However, while the fluorescent lamp emits light on the entire side surface of the fluorescent tube, the LED lamp as described in Patent Document 1 requires a configuration in which the LED element is installed on the support plate, so that the back side of the support plate is illuminated. I couldn't.

  Therefore, Patent Document 2 and Patent Document 3 disclose LED lamps that can emit light in all directions at 360 degrees with respect to the longitudinal central axis of the straight pipe. That is, Patent Document 2 discloses an LED lamp in which a plurality of LED elements are installed on both surfaces of a substrate attached inside a straight pipe along the central axis direction of the straight pipe. Patent Document 3 discloses an LED lamp in which a flexible board on which a plurality of LED elements are installed is attached to a cylindrical heat sink and installed in a straight pipe.

  However, since the configuration of the LED lamp described in the above-mentioned prior art document is a configuration in which a substrate and a heat sink are provided inside the straight tube as compared with the fluorescent lamp, the length of the straight tube increases and the weight of the LED lamp itself increases. It will increase. Then, although the fluorescent lamp is mainly supported at two points at the end of the tube, the LED lamp of the above document becomes weak because the straight tube cannot withstand the weight of the substrate or the heat sink. In addition, when the weight of the LED lamp increases, the allowable hanging load of the fluorescent lamp is exceeded, which may cause a failure of the fluorescent lamp, and it is difficult to use it as a substitute for the fluorescent lamp. It was.

  Therefore, the present inventors have obtained a light emission of 360 degrees with respect to the central axis in the longitudinal direction of the straight tube in a simpler configuration as compared with the conventional LED lamp, as in the case of the fluorescent lamp. A fluorescent LED lamp that can be used as an alternative to a fluorescent lamp has been devised.

  That is, as a first invention, a long glass tube coated with a fluorescent material that shines with ultraviolet rays on the inner surface, and the optical axis of the long glass tube is not parallel to the longitudinal central axis of the long glass tube. There is provided a fluorescent LED lamp comprising a non-parallel ultraviolet LED element.

  In addition, as a second invention, the non-parallel ultraviolet LED element is a first invention provided on a non-parallel surface whose normal direction is non-parallel to the central axis in the longitudinal direction of the long glass tube. A fluorescent LED lamp as described is provided.

  As a third invention, there is provided the fluorescent LED lamp according to the second invention, wherein the non-parallel surface includes a plurality of surfaces which are non-parallel to each other.

  Moreover, as a fourth invention, there is further provided the fluorescent LED lamp according to any one of the first to third inventions, further comprising a parallel ultraviolet LED element having an optical axis parallel to the longitudinal central axis of the long glass tube. To do.

  Further, as a fifth invention, the non-parallel UV LED element and / or the parallel UV LED element is provided at the tube end of the long glass tube, and the fluorescent LED lamp according to any one of the first to fourth inventions. I will provide a.

  Further, as a sixth invention, the non-parallel UV LED element and / or the parallel UV LED element is provided in the center of the long glass tube, and the fluorescent LED lamp according to any one of the first to fifth inventions I will provide a.

  Further, as a seventh invention, the tube end of the long glass tube is provided with a base of the same standard as used in a conventional fluorescent lamp, as described in any one of the first to sixth inventions A fluorescent LED lamp is provided.

  As an eighth aspect of the present invention, there is provided the fluorescent LED lamp according to any one of claims 1 to 7, wherein the long glass tube has a tube length of 2 meters or more.

  As a ninth invention, the non-parallel UV LED element and / or the parallel UV LED element provides the fluorescent LED lamp according to any one of the first to eighth inventions having a power of 1 watt or more.

  Further, as a tenth aspect of the invention, the non-parallel ultraviolet LED element and / or the parallel ultraviolet LED element is fed from a base of the same standard as used in a conventional fluorescent lamp, and the base receives DC power from the lamp. A fluorescent LED lamp according to the seventh invention or the eighth or ninth invention subordinate to the seventh invention is provided.

  Further, as an eleventh invention, the non-parallel ultraviolet LED element and / or the parallel ultraviolet LED element are provided at both ends of the long glass tube. To a fluorescent LED lamp according to any one of 10 to 10.

  According to a twelfth aspect of the invention, there is provided the fluorescent LED lamp according to claim 11, wherein the optical axes of the opposing non-parallel ultraviolet LED elements and / or parallel ultraviolet LED elements do not coincide with each other.

  By adopting the configuration as described above, even if the straight pipe is long, it is lightweight and can be used as an alternative to a fluorescent lamp, and the entire light emission of 360 degrees is obtained with respect to the central axis in the longitudinal direction of the straight pipe. It becomes possible to provide a fluorescent LED lamp.

The figure which shows the outline | summary of the light emission method of the conventional fluorescent lamp and LED lamp, and the fluorescent LED lamp of this invention Schematic diagram showing an example of an LED element Schematic diagram showing an example of the fluorescent LED lamp of Embodiment 1 The figure which shows the arrangement | positioning of an LED element, and the relationship of the light emission of an LED lamp Schematic diagram showing an example of installation of a non-parallel UV LED element and / or a parallel UV LED element on a pedestal and a pedestal The figure which shows an example of arrangement | positioning in a elongate glass tube of a non-parallel ultraviolet LED element or / and a parallel ultraviolet LED element Diagram showing the illuminance of ultraviolet rays at each position on the side of the long glass tube The figure which shows another example of the fluorescent LED lamp of this invention The figure which shows another example of the fluorescent LED lamp of this invention The figure which shows another example of the fluorescent LED lamp of this invention The figure which shows another example of the fluorescent LED lamp of this invention The figure which shows another example of the fluorescent LED lamp of this invention

Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to description of this specification at all, and can be implemented with various aspects within the range which does not deviate from the summary.
<< Embodiment 1 >>
<Overview>

  The present embodiment relates to a fluorescent LED lamp that includes an ultraviolet LED element that generates ultraviolet rays and can obtain light emission from the entire surface of a glass tube.

  FIG. 1 shows an outline of a light emitting method of a conventional fluorescent lamp or LED lamp and the fluorescent LED lamp of the present invention. In the conventional fluorescent lamp (a) using mercury, when the electrode 0101 at the end of the tube is heated by passing a current, electrons 0102 are emitted from the electrode, and when a voltage is applied between the two electrodes, the electron is transferred to one electrode. To the other electrode. At that time, when an electron collides with the mercury atom 0103 enclosed in the fluorescent lamp, ultraviolet rays 0104 are emitted from the mercury atom. When the emitted ultraviolet light hits the fluorescent material 0105 applied to the inner surface of the glass tube, visible light 0106 is emitted from the fluorescent material. Note that an end cap 0107 and a base 0108 are provided in the fluorescent lamp shown in FIG. Fluorescent lamps using this method are widely used. However, mercury that is harmful to the human body is enclosed in the fluorescent tube, and the life is short and the power consumption is large compared to fluorescent lamps using LEDs described later. There is a problem.

  On the other hand, in the conventional LED lamp (b), current is supplied to the plurality of LED elements 0112 installed on the support plate 0111 inside the LED lamp, and visible light 0113 is emitted from the plurality of LED elements. Although not shown, if the LED elements are installed on both sides of the support plate, the entire light emission of approximately 360 degrees with respect to the central axis in the longitudinal direction of the straight tube can be obtained as in the fluorescent lamp. However, in the configuration of the conventional LED lamp, it is necessary to provide a support plate for installing the LED lamp inside the straight tube, a heat sink for dissipating the heat generated from the LED lamp, and so on. The weight of the LED lamp itself is also greatly increased. Then, when trying to connect a long LED lamp to the lamp of a conventional fluorescent lamp, the LED lamp cannot be supported by only two points at the tube end of the LED lamp, so that it cannot be used as a substitute for the fluorescent lamp. There is.

  Although not shown in the drawings, as another example of the LED lamp, for example, in International Publication No. 2009/001478, an LED that generates ultraviolet rays is installed at both ends of a glass fluorescent tube used in a conventional fluorescent lamp. An LED lamp is disclosed in which light is emitted from the entire surface of a fluorescent tube with high efficiency by introducing a light scattering member that diffuses or scatters ultraviolet rays generated from the LED. Japanese Patent Application Laid-Open No. 2011-243549 discloses an LED lamp that can emit light from the entire surface of a fluorescent tube by diffusing ultraviolet rays generated from the LED through the light guide into the fluorescent tube. However, since it is necessary to introduce a light scattering member or a light guide made of an ultraviolet transmitting material (quartz or the like) into the fluorescent tube, the cost is higher than the fluorescent LED lamp of the present invention, and the LED shown in (b) Similar to the lamp, when the straight tube is long, the weight of the LED lamp itself is greatly increased, and there is a problem that it cannot be used as a substitute for a fluorescent lamp.

  Furthermore, as another example of the LED lamp, in Japanese Patent Application Laid-Open No. 2011-54421, a support shaft portion along the axial direction of the envelope portion is provided inside the cylindrical envelope portion, and the circumference of the ring-shaped substrate is provided. An LED lamp is disclosed in which light-emitting substrates on which a plurality of LEDs are mounted along a direction are mounted at predetermined intervals in the axial direction of a support shaft portion. Like the fluorescent lamp, this LED lamp can obtain light emission of almost 360 degrees with respect to the central axis in the longitudinal direction of the straight tube. However, like the conventional LED lamp shown in FIG. Since the support shaft portion is also long, the weight of the LED lamp itself is greatly increased, and there is a problem that it cannot be used as a substitute for a fluorescent lamp.

  In the fluorescent LED lamp (c) of the present invention, current is supplied to the non-parallel ultraviolet LED element 0122 installed on the pedestal 0121, and ultraviolet rays 0123 are emitted from the non-parallel ultraviolet LED element. Then, the emitted ultraviolet rays hit the fluorescent material 0124 applied to the inner surface of the glass tube, and visible light 0125 is emitted from the fluorescent material. That is, the light emission principle of the fluorescent LED lamp of the present invention uses an ultraviolet LED element instead of mercury that generates ultraviolet rays in the fluorescent lamp (a). The advantages of adopting this configuration will be described below.

FIG. 2 is a schematic diagram showing an example of an LED element. LED elements are mainly classified into two types: a cannonball type shown in (a) and a surface mount type shown in (b). The LED element may be a bullet-type or a surface-mount type. For example, as shown in (c), the LED element may be used by diverging light emitted from the LED chip using a concave lens 0208 at a wide angle. There may be. In the present invention, the “LED element” refers to, for example, the LED chip 0201, the lens 0202, the lead frame 0203, the bonding wire 0204, and the like, as shown in FIG. Then, an LED element as a package including an LED chip, a bonding wire, a substrate 0205, an electrode 0206, a reflection plate 0207, and the like will be described.
<Configuration>

  FIG. 3 is a schematic view showing an example of the fluorescent LED lamp of the present embodiment. (A) is the figure seen from the orthogonal | vertical direction with respect to the longitudinal direction central axis of a long glass tube, (b) has shown the figure seen from the parallel direction. For example, it is conceivable that the fluorescent LED lamp of this embodiment is mainly composed of a “long glass tube” 0301 and a “non-parallel ultraviolet LED element” 0302. In the example shown in the figure, an “end cap” 0305 and a “cap” 0306 are provided. Here, the “base” is provided for connection to a conventional fluorescent lamp, and the supply of current to the non-parallel ultraviolet LED element may not be performed through the base. When power is supplied from the base, it is necessary to use a conductive material as the base. However, when power is supplied from other than the base, a non-conductive material can be used as the base. good.

  The “long glass tube” 0301 has an inner surface coated with a fluorescent material 0303 that shines with ultraviolet rays. By irradiating the fluorescent material with ultraviolet light emitted from a non-parallel ultraviolet LED element, which will be described later, the entire 360-degree light emission can be obtained with respect to the central axis in the longitudinal direction of the straight tube similarly to the fluorescent lamp. In addition, since the light emitted from the LED element has a strong directivity, the user may feel uncomfortable as compared with a fluorescent lamp, but the present invention uses the same light emission principle as that of a conventional fluorescent lamp. Therefore, even when used as a substitute for a fluorescent lamp, it is possible to obtain light emission that does not cause discomfort to the user.

  “Long” does not particularly specify the length of the glass tube, but if the length is the same as the tube length used in the conventional fluorescent lamp, the fluorescent LED lamp of the present invention is replaced with the conventional fluorescent lamp. This is preferable because it can be used as a substitute. Although it is not particularly limited as a “fluorescent substance that shines with ultraviolet rays”, at least one of calcium carolinate, calcium tungstate, magnesium tungstate, zinc silicate, calcium silicate, etc. applied to the inner surface of a conventional fluorescent lamp is used. It is possible to use. That is, as the long glass tube of the LED lamp of the present invention, it is possible to use the same manufacturing method as the glass tube used for the conventional fluorescent lamp.

  The long glass tube may have a tube length of 2 meters or more. For example, a fluorescent lamp installed in a tunnel has a long tube length. In the case of the conventional LED lamp, since the support plate and the heat sink are provided in the tube, when the tube length increases, the weight of the LED lamp also greatly increases, and the LED lamp can be supported only by two points at the tube end. Therefore, there is a problem in that it cannot be connected to a conventional fluorescent lamp or a tube end portion supporting the LED lamp is liable to be defective. However, in the present invention, since the non-parallel ultraviolet LED element is mainly installed at the tube end or the central cross section of the tube, the support plate and the heat sink are also installed at the tube end or the central cross section. Then, even if the tube length is long, the weight of the fluorescent LED lamp does not increase greatly, that is, it can be connected to a conventional fluorescent lamp without any problem.

  Moreover, in the conventional LED lamp, the resin-made transparent cover may be provided in order to protect an LED element. However, the resin cover expands and contracts due to changes in the outside air temperature, heat generation from the LED elements, and the like. Then, as the tube length becomes longer, the amount of expansion / extension of the cover increases, but as the change in the tube length of the cover increases, problems such as falling off of the cover from the LED lighting lamp are more likely to occur. Since the fluorescent LED lamp of the present invention is composed of a long glass tube, the occurrence of the problem does not matter.

  The “non-parallel UV LED element” 0302 is provided in the cross section of the long glass tube, and the optical axis is not parallel to the longitudinal central axis of the long glass tube. The “ultraviolet LED element” refers to an element that generates ultraviolet light when supplied with electric current. The ultraviolet light is emitted from the non-parallel ultraviolet LED element and irradiated to the fluorescent material on the inner surface of the long glass tube, thereby Similarly, light emission of the entire surface of 360 ° with respect to the longitudinal center axis of the straight pipe can be obtained. The “optical axis” indicates the central direction of the irradiation direction of the ultraviolet light emitted from the ultraviolet LED element, and usually indicates the direction perpendicular to the light emitting surface of the ultraviolet LED element.

  FIG. 4 shows the relationship between the arrangement of the LED elements and the light emission of the LED lamp. (A) is the arrangement of LED elements such that the optical axis of the LED element emitting visible light is perpendicular to the central axis in the longitudinal direction 0401 of the straight tube as in the conventional LED lamp, and (b1) is parallel. The state of light emission of the LED lamp in such an arrangement is shown. (B2) is an arrangement in which the optical axis of an ultraviolet LED element that emits ultraviolet rays is parallel to the central axis in the longitudinal direction of the straight tube, and (c) is an LED lamp in an arrangement that is non-parallel. This shows the state of light emission. The irradiation angle of the light emitted from the LED element is generally about 120 degrees at most, and the support plate 0402 is arranged so that the optical axis 0401 of the LED element is perpendicular to the longitudinal central axis of the straight tube as shown in FIG. If the LED element 0403 is disposed on the LED lamp, the light emitting surface 0404 of the LED lamp obtained by one LED element becomes very small. Then, if it is going to obtain light emission of the whole side surface of a long glass tube like a fluorescent lamp, very many LED elements will be needed.

  Therefore, when the LED element is placed on the pedestal 0411 so that the optical axis of the LED element is parallel to the longitudinal central axis of the straight tube as shown in (b1), it is obtained by one LED element as compared with (a). The light emitting surface of the LED lamp is very large. However, when the light emitted from the LED element is used as direct illumination light, the light travels straight, so that the light is extracted in the normal direction of the side surface of the straight tube, such as a fluorescent lamp or an LED lamp shown in (a). Cannot be used as an alternative to fluorescent lamps.

  On the other hand, as shown in (b2), the ultraviolet LED element 0421 is installed on the pedestal so that the optical axis is parallel to the longitudinal central axis of the straight tube, and the fluorescent material 0422 is applied to the inner surface of the straight tube. The ultraviolet light emitted from the ultraviolet LED element is applied to the fluorescent material, and visible light is emitted from the fluorescent material. Then, unlike the LED lamp shown in (b1), light can be extracted also in the normal direction of the side surface of the straight pipe. However, since the irradiation angle of light emission of the LED element is usually less than 180 degrees, the fluorescent material near the cross section where the LED element is installed cannot be irradiated with light from the LED element (0405), that is, directly. The light emission from the entire side surface of the tube cannot be obtained.

  In the present invention, as shown in (c), the non-parallel ultraviolet LED element 0431 is provided in the cross section of the long glass tube, and the optical axis is not parallel to the central axis in the longitudinal direction of the long glass tube. Then, it becomes possible to irradiate all the fluorescent materials on the inner surface of the straight tube with the light emitted from the non-parallel ultraviolet LED element, thereby preventing the occurrence of the non-irradiated surface shown in (b), that is, emitting light from the entire side surface of the long glass tube. It becomes possible to provide the obtained fluorescent LED lamp. Normally, the “cross section of the long glass tube” refers to a plane perpendicular to the longitudinal direction of the long glass tube, but the “cross section of the long glass tube” in the present invention is a long section. A plane (for example, 60 degrees to 90 degrees) approximately perpendicular to the longitudinal direction of the glass tube is also included.

  Moreover, it is preferable that the fluorescent LED lamp of the present invention is configured such that the optical axes of the opposing non-parallel ultraviolet LED elements and / or parallel ultraviolet LED elements described later do not coincide with each other. By adopting this configuration, it is possible to minimize the overlapping of the irradiation regions of the ultraviolet rays emitted from the respective non-parallel ultraviolet LED elements and / or parallel ultraviolet LED elements, that is, the non-parallel ultraviolet LED elements and / or It becomes possible to cause the ultraviolet light emitted from the parallel ultraviolet LED element to efficiently act on the light emission of the fluorescent LED lamp. In addition, it is possible to prevent the deterioration of the non-parallel ultraviolet LED element or / and the parallel ultraviolet LED element facing the element due to the ultraviolet rays emitted from one non-parallel ultraviolet LED element or / and the parallel ultraviolet LED element. .

  FIG. 5 is a schematic view showing an example of installation of a pedestal and a non-parallel ultraviolet LED element on the pedestal. The non-parallel ultraviolet LED element 0501 may be provided on a non-parallel surface 0502 that is a surface whose normal direction is not parallel to the central axis in the longitudinal direction of the long glass tube. The non-parallel surface is constituted by, for example, one surface of a pedestal 0500 provided in the cross section of the long glass tube. The material of the “pedestal” is not particularly limited, but current may be supplied to the non-parallel UV LED element through the “pedestal”. For example, a lead wire for supplying current to the pedestal is installed. You may do it. In that case, one end of the lead wire is connected to the non-parallel ultraviolet LED element, and the other end is electrically connected to a fluorescent lamp fixture to which the fluorescent LED lamp is connected through a base or the like.

  The non-parallel surface preferably includes a plurality of surfaces that are non-parallel to each other. That is, a configuration in which one or a plurality of non-parallel ultraviolet LED elements are installed on each surface is preferable. At this time, if the plurality of non-parallel surfaces are installed so as to have rotational symmetry with respect to the central axis in the longitudinal direction, light emission from the fluorescent LED lamp is 360 degrees with respect to the central axis in the longitudinal direction of the straight tube. Since it can be made uniform in all directions, it is more preferable. For example, in the example shown in FIG. 5A, the pedestal is configured to be square when viewed from above, and is symmetric about four times with respect to the central axis. The pedestal may be configured to be a regular triangle when viewed from above as shown in FIG. 5 (c), or may be configured to be a regular pentagon as shown in FIG. 5 (e). .

  The fluorescent LED lamp of the present invention may include a parallel ultraviolet LED element 0503 having an optical axis parallel to the longitudinal central axis of the long glass tube in addition to the non-parallel ultraviolet LED element. (B), FIG. 5 (d), and FIG. 5 (f) are diagrams showing examples thereof. The parallel ultraviolet LED element is provided on a parallel surface 0504 whose normal direction is parallel to the central axis in the longitudinal direction of the long glass tube. Further, the pedestal shown in FIGS. 5 (a) to 5 (f) is convex with respect to the cross section, but may be concave as shown in FIGS. 5 (g) and 5 (h).

  Further, since the LED element is generally vulnerable to heat, when the LED element is used in a fluorescent LED lamp, it is necessary to dissipate heat generated from the LED element. Therefore, for example, it is preferable to provide a heat dissipation structure such as a heat sink on the non-parallel surface where the non-parallel ultraviolet LED element is installed and the parallel surface where the parallel ultraviolet LED element is installed.

  FIG. 6 is a diagram showing an example of the arrangement of non-parallel UV LED elements and / or parallel UV LED elements in a long glass tube. The non-parallel UV LED element or / and the parallel UV LED element are provided in the cross section of the long glass tube and are provided at the tube end of the long glass tube (FIG. 6A). (FIGS. 6B and 6C). At that time, if the non-parallel ultraviolet LED element and / or the parallel ultraviolet LED element are arranged so as to be symmetrical with respect to the transverse cross section at the center in the longitudinal direction of the long glass tube, Since it becomes a fluorescent LED lamp which can obtain left-right symmetric light emission, it is preferable.

  When the non-parallel ultraviolet LED element and / or the parallel ultraviolet LED element are provided at both ends of the long glass tube, when connecting the fluorescent LED lamp of the present invention to a conventional fluorescent lamp, The fluorescent LED lamp is supported at both ends of the long glass tube, and the non-parallel ultraviolet LED element and / or the parallel ultraviolet LED element can be supported near the support point of the fluorescent LED lamp.

  Moreover, when it is set as the structure with which a non-parallel ultraviolet LED element or / and a parallel ultraviolet LED element is provided in the both tube ends of a long glass tube, it shows all except the tube end of a long glass tube. In addition, the non-parallel UV LED element and / or the parallel UV LED element may be provided in the cross section at the center in the longitudinal direction of the long glass tube (FIG. 6B) or provided in a plurality of cross sections. It is good also as a structure (FIG.6 (c)). In that case, it is good also as a structure which provides the support plate 0601 in the cross-sectional part of a long glass tube, and installs a base on a support plate, for example. When a plurality of cross-sectional portions are provided, it is preferable that the distance between the cross-sectional portions is constant in order to make all the light emission on the side surface of the long glass tube between the cross-sectional portions uniform.

  FIG. 7 is a diagram showing the illuminance of ultraviolet rays at each position on the side surface of the long glass tube. Fig.7 (a) has shown about the illumination intensity of the ultraviolet-ray in the side line part of a long glass tube. In the figure, the illuminance 0703 of ultraviolet rays radiated from the non-parallel ultraviolet LED element 0701 installed on the cross section of one end of the long glass tube decreases as the distance increases along the longitudinal direction of the long glass tube. Go. On the other hand, the illuminance 0704 of ultraviolet rays emitted from the non-parallel ultraviolet LED element 0702 installed on the other cross section also decreases as the distance increases in the longitudinal direction of the long glass tube. In the fluorescent LED lamp of the present invention, the illuminance of ultraviolet rays at the side line portion of the long glass tube is almost equal at any position of the long glass tube due to the radiation of ultraviolet rays from both non-parallel ultraviolet LED elements 0701 and 0702 at both ends. It is desirable to make it uniform. With this configuration, the light emission of the fluorescent LED lamp can be made uniform at any position of the long glass tube. In addition, although the example shown to a figure is a case where a non-parallel ultraviolet LED element is installed in the both ends of a long glass tube, for example, when a parallel ultraviolet LED element is provided, a non-parallel ultraviolet LED element or / and a parallel ultraviolet light The same applies to the case where the LED element is provided in the center of the tube.

  Moreover, FIG.7 (b) has shown about the illumination intensity of the ultraviolet-ray along the circumference | surroundings of the side surface of a long glass tube. As described in FIG. 7A, the illuminance of ultraviolet rays emitted from the non-parallel ultraviolet LED elements 0711, 0712, 0713, and 0714 decreases as the distance increases. However, in the fluorescent LED lamp of the present invention, it is preferable that the illuminance of ultraviolet rays along the periphery of the side surface of the long glass tube is substantially uniform, and by adopting this configuration, the longitudinal central axis of the long glass tube In contrast, a fluorescent LED lamp that emits light uniformly in all directions at 360 degrees can be obtained.

  The non-parallel UV LED element and / or the parallel UV LED element may be 1 watt or more. Since the conventional LED illumination lamp uses a plurality of LED elements, those of about 0.5 watts have been the mainstream. However, in the present invention, an LED lamp can be configured with a relatively small number of LED elements as compared with a conventional LED lamp, and an LED lamp with sufficiently low power consumption is provided even when an element of 1 watt or more is used. It becomes possible. Note that the power consumption of the ultraviolet LED element can be arbitrarily selected. For example, a small power consumption is used for a short tube length, and a high power consumption is used for a long tube length. It is good also as a structure. Moreover, it is good also as a structure which has the light control function which adjusts the electric current sent through an ultraviolet LED element and controls the light emission amount of a fluorescent LED lamp.

The non-parallel UV LED element and / or the parallel UV LED element may be supplied with power from a base of the same standard as used in a conventional fluorescent lamp, and the base may receive DC power from the lamp. Usually, the household power source is AC, and the fluorescent lamp uses AC power as it is. However, since the LED element does not operate with alternating current, it is necessary to convert alternating current power into direct current power when using a conventional LED lamp. It is conceivable to use an AC / DC converter for “converting AC power to DC power”, and the AC / DC converter may be arranged in the fluorescent LED lamp of the present invention, but the LED lamp is connected. An AC / DC converter may be connected to the lamp in advance, and direct current power may be supplied from the lamp to the fluorescent LED lamp through the base.
<Another configuration>

  FIG. 8 shows another example of the fluorescent LED lamp of the present invention. (A) is the figure seen from the orthogonal | vertical direction with respect to the longitudinal direction central axis of a long glass tube, (b) has shown the figure seen from the parallel direction. In the fluorescent LED lamp shown in FIG. 8, the base 0801 is configured like a shell of a conch, a spiral non-parallel surface 0802 is provided as a side surface, and a non-parallel ultraviolet LED element 0803 is installed on the non-parallel surface. . Further, the base and the motor 0804 are connected, and the motor is rotated at a high speed when the fluorescent LED lamp is caused to emit light. By adopting this configuration, it is possible to uniformly irradiate the fluorescent material 0806 applied to the inner surface of the long glass tube 0805 with the ultraviolet rays emitted from the non-parallel ultraviolet LED. Luminescence can be obtained.

  FIG. 9 shows another example of the fluorescent LED lamp of the present invention. (A) is the figure seen from the orthogonal | vertical direction with respect to the longitudinal direction central axis of a long glass tube, (b) has shown the figure seen from the parallel direction. The fluorescent LED lamp shown in FIG. 9 is provided with a reflector 0902 around a pedestal 0901. By adopting this configuration, the ultraviolet light emitted from the non-parallel ultraviolet LED element 0903 is reflected by the reflecting material, so that the fluorescent LED lamp can emit light efficiently.

  FIG. 10 shows another example of the fluorescent LED lamp of the present invention. (A) is the figure seen from the orthogonal | vertical direction with respect to the longitudinal direction central axis of a long glass tube, (b) has shown the figure seen from the parallel direction. The fluorescent LED lamp shown in FIG. 10 has a red fluorescent material 1001 that can obtain red light emission on the side surface of one long glass tube when the long glass tube is divided in a cross section along the longitudinal central axis. On one side, a white fluorescent material 1002 capable of obtaining white light emission is applied. In addition to the fixed base and end cap, the long glass tube can be rotated. With this configuration, a plurality of emission colors can be obtained even with a single fluorescent LED lamp. In addition, the fluorescent substance to apply | coat may be 3 or more types, and the arrangement | positioning is not specifically limited, either.

  FIG. 11 shows another example of the present invention. (A) is the figure seen from the orthogonal | vertical direction with respect to the longitudinal direction central axis of a long glass tube, (b) has shown the figure seen from the parallel direction. The fluorescent LED lamp shown in FIG. 11 has a configuration capable of controlling the emission of ultraviolet rays from each of the non-parallel ultraviolet LED elements installed on the non-parallel surface. That is, a power source On-non-parallel UV LED element 1101 that emits ultraviolet rays by flowing current and a power source Off-non-parallel UV LED element 1102 that does not flow current can be freely used by using the non-parallel UV LED elements that are installed. It is set as the structure which can be arrange | positioned in. Then, a portion irradiated with ultraviolet rays emitted from the power source On-non-parallel ultraviolet LED element becomes a light emitting surface 1103 from which visible light is emitted, and the other surface becomes a non-light emitting surface 1104.

  This will be described in detail with reference to FIG. In this example, the phosphor screen of the long glass tube is divided into four 90 ° sections in cross-sectional view, and this is assigned to each non-parallel ultraviolet LED element. In other words, the non-parallel UV LED element 1111 is configured to mainly use the 1121 part, 1112 mainly 1122 part, 1113 mainly 1123 part, and 1114 mainly 1124 part. Keep it. As a result, light emission and non-light emission of the inner surface of each long tube divided into four parts corresponding to the power sources On and Off of the non-parallel ultraviolet LED elements are controlled. In the example shown in the figure, the power sources of the non-parallel ultraviolet LED elements 1111 and 1113 are set to On, and the fluorescent materials 1121 and 1123 corresponding to the elements are irradiated with ultraviolet rays, and the parts emit light. On the other hand, the power sources of the non-parallel ultraviolet LED elements 1112 and 1124 are turned off, and the fluorescent materials 1122 and 1124 corresponding to the elements are not irradiated with ultraviolet rays, and the parts do not emit light. By adopting this configuration, it becomes possible not only to freely control the emission intensity of the fluorescent LED lamp, but also according to the arrangement of the power supply Off-non-parallel UV LED element and the power supply On-non-parallel UV LED element, for example. It is possible to freely control the light emitting surface and the non-light emitting surface. In addition, although this example was shown by four division, it is not restricted to this, If the non-parallel ultraviolet LED element is arrange | positioned so that the fluorescent surface of a long tube may be divided | segmented into plurality and only each division surface may be irradiated with an ultraviolet-ray Light emission and non-light emission of the divided phosphor screen can be controlled. This is possible because the UV LED elements are arranged non-parallel. In addition, in the case of the fluorescent LED lamp shown in FIGS. 6B and 6C, the fluorescence on the inner surface of the long glass tube divided into two and three in the longitudinal direction of the long glass tube is shown. The light emission and non-light emission of the substance can be controlled by the on and off of the power source of the non-parallel ultraviolet LED element that bears each divided portion. In this example, the number of divisions is not limited to two and three, and any number of divisions may be used. Also, multiple non-parallel UV LED elements and / or parallel UV LED elements that share the same phosphor screen, and turning on / off the power of each non-parallel UV LED element or / and parallel UV LED element, only light emission and non-light emission In addition, the emission intensity can be controlled.

  In FIG. 11C, FIG. 11B will be described in more detail. The ultraviolet rays emitted from the non-parallel ultraviolet LED element 1131 are diffused as the distance from the element increases with the optical axis 1132 as the center. Therefore, when the long glass tube 1133 is arranged as shown in the figure, it is possible to make the irradiation surface 1134 of the ultraviolet rays to the inner surface of the long glass tube at the position (A) and the position (B) constant. . That is, as described above, the phosphor screen of the long glass tube is divided by the arrangement of the non-parallel ultraviolet LED elements, and the emission and non-emission of each phosphor screen can be controlled.

FIG. 12 shows another example of the present invention. (A) is the figure seen from the orthogonal | vertical direction with respect to the longitudinal direction central axis of a long glass tube, (b) has shown the figure seen from the parallel direction. In the fluorescent LED lamp shown in FIG. 12, a long glass tube 1201 and an end cap 1202 on which a non-parallel ultraviolet LED element and a pedestal are installed can be separated (c). By adopting this configuration, for example, when it is desired to increase the luminance of the fluorescent LED lamp, the wattage is larger than the non-parallel ultraviolet LED element originally installed in the end cap connected to the long glass tube or / Further, it can be handled by replacing the end cap with a large number of elements. Further, when it is desired to change the emission color of the fluorescent LED lamp, the end cap is used as it is, and a long glass tube coated with a fluorescent material having a different emission color from the fluorescent material originally applied to the fluorescent LED lamp. We can cope by exchanging for. That is, each component of the LED lamp can be used more efficiently than before.
<How to use>

  The fluorescent LED lamp of the present invention can be used for various applications, and is suitable as an electric lamp used for, for example, a vending machine or a signboard. For example, in a vending machine that displays product samples in a three-dimensional manner instead of two-dimensionally, the entire product sample array space must be proved, so that the fluorescent LED lamp of the present invention can be suitably used.

  In addition, such vending machines have a high lighting effect on the installation space of the vending machines. For example, the power supply of such vending machines can be used even in the event of a power outage or during a power outage or disaster. It can also be used as an emergency light. Furthermore, when the product sold by such a vending machine is, for example, a beverage or a food product, it may be possible to use it as an emergency food at the time of a disaster without requiring the input of money. For example, it is good to be able to take out a corresponding product by selecting a selection button without detecting the input of money by detecting a power failure state. In addition, since it can prevent that a vending machine is destroyed by a disaster victim if comprised in this way, it is desirable also from this viewpoint.

  In addition, the fluorescent LED lamp of the present invention can be suitably used as a signboard that can be viewed from the front-rear direction, or as a background illumination of a signboard that can be viewed from the front-rear and left-right directions. For example, it is conceivable that the fluorescent LED lamp of the present invention is suspended from the axial center portion of the cylindrical poster pasting body inside the poster pasting body made of a cylindrical transparent plastic. With such a configuration, an image printed on a transparent thin plastic material or the like pasted along the outer periphery of the poster pasting body can be observed from the entire circumference of the poster pasting body. Such a signboard may be installed in the vending machine.

Moreover, the fluorescent LED lamp of the present invention may be installed, for example, in a medical camera. A medical camera such as a stomach camera or an endoscope is preferably capable of photographing the entire surface of 360 degrees when inserted into a human body. In that case, a light source capable of illuminating the entire surface of 360 degrees is required, and the fluorescent LED lamp of the present invention can be suitably used.
<Effect>

  By adopting the configuration as described above, even if the straight pipe is long, it is lightweight and can be used as an alternative to a fluorescent lamp, and the entire light emission of 360 degrees is obtained with respect to the central axis in the longitudinal direction of the straight pipe. It becomes possible to provide a fluorescent LED lamp.

0301: Long glass tube 0302: Non-parallel UV LED element

Claims (12)

A long glass tube coated with a fluorescent material that glows with ultraviolet rays on its inner surface;
A non-parallel UV LED element that is provided in the transverse section of the long glass tube and whose optical axis is non-parallel to the longitudinal central axis of the long glass tube;
Fluorescent LED lamp consisting of   2. The fluorescent LED lamp according to claim 1, wherein the non-parallel ultraviolet LED element is provided on a non-parallel surface whose normal direction is non-parallel to a central axis in a longitudinal direction of the long glass tube.   The fluorescent LED lamp according to claim 2, wherein the non-parallel surface includes a plurality of surfaces that are non-parallel to each other.   The fluorescent LED lamp according to any one of claims 1 to 3, further comprising a parallel ultraviolet LED element having an optical axis parallel to a longitudinal central axis of the long glass tube.   The fluorescent LED lamp according to any one of claims 1 to 4, wherein the non-parallel ultraviolet LED element and / or the parallel ultraviolet LED element is provided at a tube end of the long glass tube.   The fluorescent LED lamp according to any one of claims 1 to 5, wherein the non-parallel ultraviolet LED element and / or the parallel ultraviolet LED element is provided in the center of the long glass tube.   The fluorescent LED lamp according to any one of claims 1 to 6, wherein a base of the same standard as that used in a conventional fluorescent lamp is provided at a tube end of the long glass tube.   The LED lamp according to any one of claims 1 to 7, wherein the long glass tube has a tube length of 2 meters or more.   The fluorescent LED lamp according to any one of claims 1 to 8, wherein the non-parallel ultraviolet LED element and / or the parallel ultraviolet LED element is 1 watt or more.   The non-parallel ultraviolet LED element and / or the parallel ultraviolet LED element is supplied with power from a base of the same standard as used in a conventional fluorescent lamp, and the base receives DC power from the lamp. The fluorescent LED lamp according to claim 8 or 9.   The fluorescence according to any one of claims 6 to 10 depending on claim 5 or claim 5 dependent on claim 5, wherein the non-parallel UV LED element and / or the parallel UV LED element is provided at both ends of the long glass tube. LED lamp.   The fluorescent LED lamp according to claim 11, wherein the optical axes of the opposed non-parallel UV LED elements and / or parallel UV LED elements do not coincide with each other.

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