JP3172924U - Fluorescent lamp type LED lighting device - Google Patents

Abstract

The present invention provides a fluorescent lamp type LED lighting device that secures sufficient brightness while increasing the irradiation angle while reducing the number of LED elements.
A mounting plate 20 is arranged in a mountain shape in a cylindrical housing constituted by an upper housing 11 made of metal and a lower housing 12 made of a transparent resin, and a left inclined portion 21 and a right inclined portion thereof. LED elements 23 are respectively attached to the lower surface of 22, and a prism sheet 24 in which a large number of triangular protrusions 25 are arranged in parallel to each other is arranged on the inner surface of the lower housing 12 made of a resin portion. The light from the LED elements 23 attached to the left inclined portion 21 and the right inclined portion 22 of the mounting plate 20 is diffused by the prism sheet 24 and emitted to the outside through the lower housing 12 made of a transparent resin.
[Selection] Figure 2

Description

  The present invention relates to a fluorescent lamp type LED illuminating device, and in particular, a fluorescent lamp type LED illuminating device in which a mounting plate is disposed in a cylindrical housing having a transparent or semi-transparent at least light emitting side, and an LED element is mounted on the mounting plate. About.

  In order to illuminate the room and reduce power consumption, a fluorescent lamp type LED illumination device is used. Such a fluorescent lamp type LED illuminating device has the same outer diameter as that of a fluorescent lamp as shown in, for example, Japanese Patent Application Laid-Open No. 2011-91015 and Japanese Patent Application Laid-Open No. 2010-212043, and is attached to a fluorescent lamp. It is an illuminating device that can be directly mounted on an appliance. This illuminating device has a cylindrical housing, and a mounting plate that also serves as a substrate is mounted inside the LED device. An LED element is mounted on one surface of the lighting device, and light from the LED device is transparent to the casing. Radiates to the outside through the milky white part.

  In the conventional general fluorescent lamp type LED lighting device, the upper half of the casing in the circumferential direction is constituted by an aluminum half cylinder, and the lower half is constituted by a transparent or milky white resin half cylinder. A cylindrical casing is formed by combining the half cylinders. And the board | substrate is distribute | arranged so that the junction part of the said aluminum half cylinder and the transparent or milky white resin half cylinder may be connected, and the LED element is mounted on this board | substrate. The LED element emits to the outside through the transparent or milky white resin portion in the lower half, thereby functioning as a lighting device.

  However, in general, the irradiation angle of the LED is narrow, and for this reason, it becomes darker than the fluorescent lamp at a portion away from the optical axis to the side. In order to compensate for this, the number of LED elements is increased to compensate for the amount of light. Therefore, even if the LED element is used, the number thereof increases, so that the power consumption becomes, for example, about 20 to 25 W on average.

JP 2011-91015 A JP 2010-212043 A

  The subject of this invention is providing the fluorescent lamp type LED illuminating device which can radiate | emit the light from an LED element to the exterior effectively and uniformly.

  Another object of the present invention is to provide a fluorescent lamp type LED lighting device that can obtain a sufficient amount of light without increasing the number of LED elements, thereby enabling reduction of power consumption.

  Still another object of the present invention is to provide a fluorescent lamp type LED lighting device in which the light irradiation angle in the cross-sectional direction is larger than that of the conventional one.

  Still another object of the present invention is to provide a fluorescent lamp type LED lighting apparatus that can use various types of LED elements.

  Still another object of the present invention is to provide a fluorescent lamp type LED lighting apparatus in which light emitted from a casing is not uneven.

  The above-described problems and other problems of the present invention will be clarified by the technical idea of the present invention described below and the embodiments thereof.

The main idea of the present application is a fluorescent lamp type LED lighting device in which a mounting plate is arranged in a cylindrical housing that is transparent or translucent at least on the light emission side, and an LED element is mounted on the mounting plate.
Both sides are inclined obliquely downward in opposite directions with respect to the center portion in the width direction of the mounting plate, and the LED element is attached to the lower side of the inclined portion,
In addition, the present invention relates to a fluorescent lamp type LED lighting device in which a light diffusion sheet is disposed on the inner surface of the housing on the light emission side.

  Here, the angle formed by the diagonally inclined portions on both sides of the mounting plate is within a range of 170 to 100 degrees, and has a mountain-shaped cross-sectional shape, and on the inside inclined to the 170 to 100 degrees. The LED element may be attached to the lower portion so that the angle formed by the optical axes of the LEDs on both sides intersects within a range of 10 to 80 degrees. The light diffusing sheet is a transparent resin sheet in which a large number of ridges having a triangular cross section are formed on one surface in parallel with each other, and is curved and flat on the side opposite to the surface on which the ridges are formed. The surface may be arranged along the inner surface of the housing. Moreover, the angle of the circumferential direction of the said housing | casing which the lower surface where the said LED element of the said attachment plate is attached faces and the light diffused by the said light-diffusion sheet radiate | emits may be 245 degrees or more. The casing is composed of an upper metal portion and a lower resin portion, the upper metal portion and the lower resin portion are combined with each other to assemble the cylindrical casing, and both sides of the mounting plate are assembled. An inclined lower end may be attached to the housing at a joint portion between the upper metal portion and the lower resin portion. In addition, the casing is composed of a cylindrical cylinder integrally formed of a transparent or translucent resin, and a mounting portion is continuously provided in the casing, and a mounting plate to which the LED element is mounted is held by the mounting portion. May be.

The main idea of the present application is a fluorescent lamp type LED lighting device in which a mounting plate is arranged in a cylindrical housing that is transparent or translucent at least on the light emission side, and an LED element is mounted on the mounting plate.
Both sides are inclined obliquely downward in opposite directions with respect to the center portion in the width direction of the mounting plate, and the LED element is attached to the lower side of the inclined portion,
In addition, the present invention relates to a fluorescent lamp type LED lighting device in which a light diffusion sheet is disposed on the inner surface of the housing on the light emission side.

  According to the fluorescent lamp type LED lighting device having such a configuration, the light from the LED element attached to the portion inclined obliquely downward of the attachment plate is applied to the light diffusion sheet disposed on the inner surface on the emission side of the housing. The light is diffused by the light diffusion sheet, and the diffused light is emitted to the outside through the transparent or translucent portion of the housing. Therefore, it is possible to perform illumination by using light from the LED element more effectively. For this reason, it is possible to reduce the power consumption by improving the light use efficiency and to reduce the number of LED elements attached. It becomes possible to make it less than before. Further, since the light from the LED element is diffused using the light diffusion sheet, unevenness is not generated in the light emitted from the transparent or translucent portion of the housing.

It is a longitudinal cross-sectional view which follows the axial direction of the fluorescent lamp type LED illuminating device of one embodiment of this invention device. It is an enlarged vertical sectional view of the fluorescent lamp type LED lighting device in the direction perpendicular to the axial direction.

  The present invention will be described below with reference to the illustrated embodiments. FIG. 1 shows the overall configuration of the fluorescent lamp type LED lighting device according to the present embodiment. Here, the casing is composed of an upper metal portion 11 and a lower resin portion 12, which are joined to each other. As a result, a cylindrical casing is assembled. The lower resin portion 12 is formed of a molded body of polycarbonate resin or acrylic resin. As shown in FIG. 2A, the upper housing 11 is provided with engagement protrusions 13 on both side ends thereof, and the engagement protrusions 13 are engaged with engagement recesses 14 on both sides of the lower housing 12, As a result, a casing having a circular cross section is assembled. As shown in FIG. 1, a cap 15 having a circular cap shape is attached to both ends of the casings 11 and 12 in the axial direction, and terminal pins 16 are implanted so as to protrude from the cap 15. Yes. Such terminal pins 16 can be attached to a fluorescent light fixture (socket).

  The following describes the internal structure of such a fluorescent lamp type LED lighting device. As shown in FIG. 2, a mounting plate 20 is disposed inside the housings 11 and 12 so as to be bent in a mountain shape. That is, the mounting plate 20 includes a left inclined portion 21 and a right inclined portion 22 and has a cross-sectional structure, and the angle between the inclined portions 21 and 22 on both sides is, for example, 150 degrees. A chip-like LED element 23 is attached to each of the left inclined portion 21 and the right inclined portion 22 of the mounting plate 20. That is, the mounting plate 20 also serves as a wiring board, and power is supplied to the LED element 23 by a copper foil wiring pattern formed on the lower surface. In the present embodiment, the angle formed between the left inclined portion 21 and the right inclined portion 22 is set to 150 degrees as described above, and the left inclined portion 21 and the right inclined portion 22 are set to 150 degrees as described above. LED elements 23 are respectively attached to the lower surfaces of the LED.

  Here, an angle θ (see FIG. 2A) between the left inclined portion 21 and the right inclined portion 22 of the mounting plate 20 that are opposite to each other and inclined in the opposite direction is within a range of 170 to 100 degrees. It is preferable. If this angle is larger than 170 degrees, the side portion of the light emitted from the LED element 23 may not be applied to the prism sheet 24, and the effect of diffusion by the prism sheet 24 is reduced. On the other hand, when the angle formed by the left inclined portion 21 and the right inclined portion 22 is smaller than 100 degrees, the light emitted from the LED element 23 is likely to concentrate on the central portion of the prism sheet 24 in the circumferential direction. Not only are the pole portions of the prism sheet 24 not used effectively, but the light emitted through the illumination device is particularly strong in the lower portion, but darker in the side portions. Therefore, it is preferable that the angle formed between the left inclined portion 21 and the right inclined portion 22 is within a range of 170 to 100 degrees.

  The LED elements 23 attached to the left inclined portion 21 and the right inclined portion 22 of the mounting plate 20 have their optical axes perpendicular to the surfaces of the left inclined portion 21 and the right inclined portion 22 and oblique. It turns downward. The optical axes of the left and right LED elements 23 intersect each other in the vicinity of or above the upper surface of the prism sheet 24. Here, if the intersection angle formed by the optical axes of the left and right LED elements 23 is α, the relationship α + θ = 180 degrees is established. Therefore, α = 180−θ. Accordingly, when θ is in the range of 170 to 100 degrees, α is in the range of 10 to 80 degrees, and the LED elements 23 on the left and right sides intersect at the inside of the housing 12 at such an angle α. It becomes like this.

  Next, as shown in FIG. 2A, a prism sheet 24 is mounted on the inner side of the casing 12 composed of the lower transparent resin portion. The prism sheet 24 is a sheet made of a transparent resin, for example, an acrylic resin, a polycarbonate resin or the like, in which a large number of triangular protrusions 25 are formed in parallel to each other on the inner surface thereof. Is curved in an arc shape along the inner surface of the casing 12 and attached to the casing 12.

  In the illuminating device of the present embodiment, the angle of the casing 12 composed of the lower resin portion, which is the light emitting portion, is 245 degrees or more in the circumferential direction with respect to the central portion of the casings 11 and 12. It is preferable. In the conventional fluorescent lamp type LED lighting device of this type, the lower casing made of a transparent resin portion has an angle of about 180 degrees in the circumferential direction, and the mounting plate extends in the horizontal direction passing through the center of the casing. It was arranged so as to almost overlap with the diameter, and light was emitted within a range of 180 degrees in the lower part of the casing. On the other hand, in the present embodiment, the mounting plate 20 has a mountain shape and is biased upward so that the angle formed by the circumferential direction of the lower housing portion 12 is 245 degrees or more. Light can be emitted to the outside evenly inside, and a fluorescent lamp type LED lighting device capable of performing a wide range of illumination can be provided.

  In the configuration as described above, the light emitted from the LED elements 23 mounted on the lower surfaces of the left inclined portion 21 and the right inclined portion 22 of the mounting plate 20 has the center of the optical axis at substantially the left and right central portions of the prism sheet 24. The light is emitted so as to be directed and irradiated with a predetermined diffusion angle. A part of the light is refracted by the triangular protrusion 25 of the prism sheet 24, and then emitted to the outside through the prism sheet 24 and the housing 12. Part of the light is emitted from the LED element 23 and then reflected by the outer surface of the triangular protrusion 25 of the prism sheet 24. That is, after being reflected by the oblique surface of the triangular protrusion 25 of the prism sheet 24, it is emitted to the outside through the housing 12 made of the lower resin portion. Accordingly, the light emission angle formed by the casings 11 and 12 is increased.

  As described above, the fluorescent lamp type LED lighting device of the present embodiment effectively uses the drawback of the narrow irradiation angle of the LED 23, uses the prism sheet 24, and connects the LED element 23 with the left inclined portion 21 of the mounting plate 20. It attaches to the right inclination part 22, and makes the irradiation angle of the LED element 21 an angle with respect to the perpendicular | vertical diameter direction in FIG. For this reason, it is possible to secure the brightness while reducing the quantity of the LED elements 23 and further to set the irradiation angle of the lower resin portion 12 in the housings 11 and 12 to 300 degrees or more. .

  Next, another embodiment will be described with reference to FIG. 2B. In this embodiment, the bullet-type LED elements 23 are attached to the left inclined portion 21 and the right inclined portion 22 of the mounting plate 20, respectively. Other aspects are the same as those in the first embodiment.

  FIG. 2C shows yet another embodiment. In this embodiment, flux-type LED elements 23 are attached to the left inclined portion 21 and the right inclined portion 22 of the mounting plate 20, respectively. In addition, a prism sheet 24 having a protrusion 26 having a circular arc cross section is disposed on the inner surface of the lower resin portion 12. Even with such a configuration, substantially the same functions and effects as those of the above-described embodiment can be achieved.

  FIG. 2D shows yet another embodiment. This embodiment does not have a structure in which the casing is divided into upper and lower portions, and is configured by the casing 12 made of a cylindrical resin portion. Such a case 12 is a cylindrical case formed by extruding a transparent resin such as polycarbonate resin in the axial direction thereof. And the attachment parts 31 and 32 for hold | maintaining the attachment plates 21 and 22 which comprise the right-and-left inclination part are each formed in the inside. An attachment plate 21 that constitutes a left inclined portion is attached by the left attachment portions 31, 32, and an LED element 23 is mounted thereon. Similarly, the right mounting portions 31 and 32 hold the mounting plate 22 constituting the right inclined portion, and the LED element 23 is mounted on the mounting plate 22. Here, the angle at which the inclined portions 21 and 22 on both sides intersect and the angle formed by the optical axes of the LED elements 23 on both sides are the same as in the above embodiment.

  While the present invention has been described with reference to the illustrated embodiment, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the technical idea of the present invention. For example, the arrangement position and the number of the LED elements 23 on the mounting plate 20 in the above embodiment can be variously changed according to the purpose of use.

  The present invention can be used as a power-saving fluorescent lamp type LED lighting device that has the same external dimensions as a fluorescent lamp and uses LED light.

11 Case (Upper metal part)
12 Housing (lower resin part)
DESCRIPTION OF SYMBOLS 13 Engagement protrusion 14 Engagement recessed part 15 Base 16 Terminal pin 20 Mounting plate 21 Left side inclination part 22 Right side inclination part 23 LED element 24 Prism sheet 25 Triangular protrusion 26 Arc-shaped protrusion

Claims (6)

In the fluorescent lamp type LED lighting apparatus in which the mounting plate is arranged in a cylindrical housing whose light emission side is transparent or translucent, and the LED element is mounted on the mounting plate.
Both sides are inclined obliquely downward in opposite directions with respect to the center portion in the width direction of the mounting plate, and the LED element is attached to the lower side of the inclined portion,
Moreover, a fluorescent lamp type LED lighting device in which a light diffusion sheet is arranged on the inner surface of the housing on the light emission side.   The angle formed by the diagonally inclined portions on both sides of the mounting plate is in the range of 170 to 135 degrees, has a mountain-shaped cross-sectional shape, and is on the inner side inclined to the 170 to 135 degrees. The fluorescent lamp type LED lighting device according to claim 1, wherein the fluorescent lamp type LED lighting device is attached to a side portion so that an angle formed by optical axes of the LEDs on both sides intersects within a range of 10 to 80 degrees.   The light diffusing sheet is a transparent resin sheet in which a large number of ridges having a triangular cross section are formed in parallel on one surface, and is a flat surface opposite to the surface on which the ridges are formed by being curved The fluorescent lamp type LED illumination device according to claim 2, wherein the LED lamp is arranged along the inner surface of the housing.   The circumferential angle of the casing in which the lower surface of the mounting plate on which the LED element is mounted faces and the light diffused by the light diffusing sheet is emitted is 245 degrees or more. The fluorescent lamp type LED lighting device according to claim 2.   The casing is composed of an upper metal portion and a lower resin portion, the upper metal portion and the lower resin portion are combined with each other to assemble the cylindrical casing, and inclined on both sides of the mounting plate. The fluorescent lamp type LED lighting device according to claim 1, wherein a lower end of the fluorescent lamp type LED lighting device is attached to the housing at a joint portion between the upper metal portion and the lower resin portion.   The casing is composed of a cylindrical cylinder integrally formed of a transparent or translucent resin, and an attachment portion is continuously provided in the casing, and an attachment plate to which the LED element is attached is held by the attachment portion. The fluorescent lamp type LED illumination device according to claim 1.

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