JP2007280739A - Led line lamp for illumination - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED line lamp for illumination which has several times as long a lifetime as that of a fluorescent lamp, in terms of durability, and which can be utilized hopefully in a landmark manner, toward practical applications. <P>SOLUTION: Two sheets of substrates, in which LEDs are mounted, in a large number in a line state, are attached with a fixed angle to a heat sink of superior radiation. The body is cylindrical, a light transmission type resin cover (5) for protecting a light source (not shown) is installed on a surface, and the heat sink (3) for radiation is installed on the rear face. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an illumination LED lamp that can be replaced with a fluorescent lamp.

High-power LEDs have been improved in luminous efficiency, their brightness has been increasing year by year, and their application to LED lamps for illumination is also progressing. When these high-power LEDs are used for illumination, the amount of light is clearly insufficient in comparison with light bulbs and fluorescent lamps in the LED alone. Therefore, although light sources are gathered or LEDs are arranged in a line, illumination lamps that can be replaced with fluorescent lamps have not been put into practical use due to problems with light distribution and light quantity.
JP 2005-166578 A

  However, in order to make up for this shortage of light, it is considered that a large number of chip LEDs are arranged in a line to replace a fluorescent lamp. It was difficult to illuminate a wide area only by arranging in a shape. Further, heat dissipation of the assembled LEDs is a big problem, and solving this point is also a serious problem.

The inventor arrived at the present invention as a result of repeating various trial researches in order to solve the shortage of light quantity and the point of heat dissipation, and the present invention achieved the chip LED (2) as shown in FIG. Wide-angle light distribution is possible by attaching two printed circuit boards (1) mounted in a line shape with a certain angle α (90 ° in the embodiment). Moreover, the problem with respect to heat could be solved by providing a heat sink (heat radiating part) provided with many comb-shaped protrusions (4).

  In the present invention, two printed circuit boards on which a large number of high-power chip LEDs are arranged and mounted in a line are attached to a target at a fixed angle, and a sufficient heat dissipation measure is taken to replace a fluorescent lamp. LED line lamp that can be used. This LED line lamp has a life several times longer than a fluorescent lamp in terms of durability, and can be expected to be used epoch-makingly for practical use.

  The best mode for carrying out the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing the entire illumination line lamp A of the present invention, and FIG. 2 is a front view of the line lamp A. Yes. FIG. 3 is a side view of the line lamp A, and FIG. 4 is a sectional view of the line lamp A, showing an example of an arrangement angle of the printed circuit board.

  FIG. 1 is a perspective view showing the entirety of a fluorescent lamp replacement LED line lamp A according to the present invention. The main body has a cylindrical shape, and the surface has a light transmission type resin cover for protecting a light source (not shown). (5) is provided, and a heat sink (3) for heat dissipation is provided on the back surface.

  Since the heat sink (3) is formed by a number of comb-shaped protrusions (4) with reference to FIG. As shown in FIG. 2, the light source is mounted with a large number of chip LEDs (2) arranged on the printed circuit board (1). And since this chip LED has a narrow light region, it provides two pieces at an angle.

The angle between the two printed circuit boards (light sources) will be described with reference to FIG. The figure is a cross-sectional view of a cylindrical body. When the mounting surface of the printed circuit board (1) of the heat sink (3) is formed at 90 ° and the printed circuit board (1) is mounted on this angle surface, the LED having a narrow light region is shown. As shown in the figure, the light emitted from each of them is overlapped with each other to widen the light range and is put to practical use. For example, in this embodiment, when the length of the cylinder serving as the light source is 50 cm, a light amount almost equal to that of a 20 W fluorescent lamp can be obtained, and it can be used sufficiently for replacement of a fluorescent lamp.

  The LED used in the present invention is a high-power chip LED that has already been mass-produced. A high-power LED of a large-current large chip and a plurality of small chips that have recently been accelerated to increase the output power are gathered to obtain a high output. However, in the present invention, by using a comb-shaped heat sink with good heat dissipation efficiency, it becomes possible to use all LEDs by changing the size of the heat sink.

  In addition, it is possible to select the illumination light according to the application by selecting the type of LED phosphor for the luminescent colors having a plurality of types even in the fluorescent lamp.

  As an application of the LED line light source of the present invention, environmentally friendly pollutants such as crime prevention lamps for automatic lighting control in combination with an infrared sensor that makes good use of response speed, cold districts, lighting in large refrigerators, etc. The next generation LED line light source that doesn't use can be realized.

  As described above, the illumination line lamp of the present invention becomes a separate power source by attaching a base compatible with a fluorescent lamp at both ends as shown in FIG. 1, but can be incorporated into a conventional fixture. Therefore, this applicability is great.

The perspective view showing the whole line lamp for illumination Front view Side view Example diagram showing the layout angle of the printed circuit board

Explanation of symbols

1 Printed circuit board 2 LED
3 Heat sink 4 Comb protrusion of heat sink 5 Resin cover 7 Base 8 Mounting plate 9 Lead wire A Lighting line lamp

Claims (3)

  A wide-angle light distribution and sufficient illuminance can be obtained by attaching two printed circuit boards on which a large number of high-power chip LEDs are mounted in a line to a right and left object with a certain angle on a heat sink with a good heat dissipation efficiency. LED line lamp for lighting.   2. The LED line lamp for illumination according to claim 1, wherein the bar-shaped heat sink includes a plurality of comb-shaped protrusions arranged on the back surface of two printed boards. 2. The LED line lamp for illumination according to claim 1, wherein the whole is formed into a cylindrical shape, a transparent resin cover is disposed on the front surface, and a base is provided on both sides of the cylindrical body.

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