JPWO2009107193A1 - Lighting method - Google Patents

Abstract

Provided is an illumination method for allowing light to be appropriately reflected according to a range to be illuminated. It has a light source lamp 1 and a shade-like reflecting plate 2 whose inner surface is a reflecting surface for reflecting light from the light source lamp 1, and the reflecting surface of the reflecting plate 2 has three or more steps above and below having different inclination angles. It is an illumination method using a lighting fixture formed by inclined portions 2a to 2c, and each inclined portion 2a to 2c is formed by a combination of a plurality of planes. When the angles α to γ formed by the parts are all less than 180 ° and the light from the light source lamp is diffused to illuminate a wider range than the prescribed range, the angle formed by the upper and lower inclined parts is less than 180 °. The combination is over 180 °.

Description

  The present invention mainly relates to a lighting method using a lighting fixture installed and installed on a ceiling of a building or outdoors, and particularly relates to a shape setting method of a reflector of the lighting fixture.

  Conventionally, a hemispherical reflector is generally used as a reflector of a lighting fixture having a light source lamp and a reflector that reflects light from the light source lamp.

  However, with a hemispherical reflector, the light from the light source lamps interferes with each other and does not reach far away, so there is no problem when illuminating the lower part of about several tens of centimeters like a desk lamp on a desk. Or, if you try to illuminate the floor below from a height of about 3 to 7 m or more like a downlight installed on the ceiling of the office, there is a problem that the illuminance is insufficient. In addition, in the hemispherical reflector, there are also improvements such as providing fine irregularities on the upper surface of the inner surface and irregularly reflecting light to improve illuminance, but this also tries to illuminate the floor below the altitude There is a problem that the illuminance is insufficient.

  On the other hand, it has been considered to improve the reachability of the reflected light by using the inner surface of the reflecting plate as a polyhedron, but in the single-stage polyhedron having a single inclination angle, the light reflection direction is controlled. It is not possible to illuminate a wide area uniformly.

  Therefore, the inventor of the present application previously proposed a reflector in which the inner reflective surface is formed of three or more inclined portions with different inclination angles in Patent Document 1. According to this multistage reflector, the light from the light source lamp can be reflected in multiple directions, and it becomes possible to illuminate a specified range by controlling the reflection direction.

However, Patent Document 1 does not disclose a specific method for controlling the light reflection direction from the light source lamp, and the light reflection direction must be controlled by trial and error.
JP 2005-346968 A

  The problem to be solved by the present invention is that when the light is reflected and illuminated by the multistage reflector disclosed in Patent Document 1, the light can be appropriately reflected according to the range to be illuminated. It is to provide a method for

  The present invention has a light source lamp and a shade-shaped reflecting plate whose inner surface is a reflecting surface for reflecting light from the light source lamp, and the reflecting surface of the reflecting plate has three or more upper and lower stages each having a different inclination angle. Is an illumination method using a luminaire in which each inclined portion is formed by a combination of a plurality of planes, and when illuminating a specified range in an intensive manner, the angle formed by the upper and lower inclined portions When the light from the light source lamp is diffused to illuminate a wider range than the prescribed range, the angle formed by the upper and lower inclined parts is a combination of less than 180 ° and more than 180 °. It is.

  As described above, according to the present invention, the combination of angles formed by the upper and lower inclined portions is changed in accordance with the range of the illumination area, in other words, the illumination is concentrated or diffused (divergent). Features. That is, when illuminating a specified range in a concentrated manner, the angles formed by the upper and lower inclined portions are all less than 180 °. As described above, when the angles formed by the upper and lower inclined portions are all less than 180 °, the reflector is formed as a whole in a shade shape, and the light reflection directions are aligned, so that the specified range can be intensively illuminated. .

  On the other hand, if the angle formed by the upper and lower inclined parts is a combination of less than 180 ° and more than 180 °, the reflection direction of light by each inclined part will be greatly different, and the reflected light will diffuse and illuminate a wide area Can do.

  The illumination range can also be controlled by adjusting the vertical length of the inclined portion. That is, since the angle formed with the light source lamp varies depending on the vertical position even in the same inclined portion, the light is reflected over a wide range if the vertical length of the inclined portion is long. On the other hand, if the length of the inclined portion in the vertical direction is short, light is likely to be reflected in a certain direction. Therefore, when illuminating the specified range in a concentrated manner, the length of the inclined portion in the vertical direction is made shorter than when diffusing light from the light source lamp to illuminate a wider range than the specified range.

  Here, the reflecting plate of the luminaire used in the present invention is formed of a combination of a plurality of flat surfaces, so that the cross-sectional shape is necessarily polygonal, but reflects light uniformly. In order to do this, it is preferably a regular polygon at any location, and more preferably a regular hexagon to a regular 24 polygon.

According to the present invention, light can be appropriately reflected according to the range to be illuminated, and the light from the light source lamp can be effectively used without waste according to the range to be illuminated. Therefore, the number of light source lamps can be reduced and the output can be reduced as compared with the prior art. As a result, the amount of power used can be greatly reduced, the amount of heat generated can be reduced, the air conditioning efficiency of the building can be improved, and in turn, it can contribute to the reduction of CO ₂ emissions.

  Hereinafter, embodiments of the present invention will be described based on examples in which the present invention is applied to downlights.

  1 is a cross-sectional view showing a first embodiment of a downlight to which the present invention is applied, FIG. 2 shows a reflector used in the downlight of FIG. 1, (a) is a bottom view, and (b) is a front view. FIG.

  A downlight 10 shown in FIG. 1 includes a light source lamp 1 made of a metal halide lamp (CDM), a reflection plate 2 for reflecting light from the light source lamp 1, and a main body 3 for fixing the reflection plate 2.

  The light source lamp 1 is mounted on the top plate portion of the reflection plate 2, is mounted on a socket (not shown), and is located in the reflection plate 2.

  As shown in FIG. 2, the reflecting plate 2 has a cap shape with a regular hexagonal bottom surface shape (transverse cross-sectional shape), and the reflecting surface on the inner surface has first inclined portions 2a and second inclined portions having different inclination angles. This is a three-stage structure composed of 2b and a third inclined portion 2c. These inclined portions 2a to 2c are formed by a combination of a plurality of planes formed by bending one plane. The angle α formed by the first inclined portion 2a and the second inclined portion 2b and the angle β formed by the second inclined portion 2b and the third inclined portion 2c are both set to be less than 180 °. As a result, as shown in FIGS. 1 and 2, the reflecting plate 2 has a light-shade shape as a whole, and the light reflection directions are aligned, so that a specified range can be intensively illuminated.

  In other words, the present embodiment is suitable for an application in which the light from the light source lamp 1 is focused and intensively illuminated. As such an application, the light from the light source lamp 1 can be used effectively without waste. Therefore, the number of light source lamps can be reduced and the output can be reduced as compared with the prior art.

  In this embodiment, the material of the reflecting plate 2 is aluminum, and the reflecting surface on the inner surface is mirror-like by coating the surface of aluminum with titanium / silicon. The material of the reflecting plate is not limited to aluminum, and the inner surface may be mirror-finished using, for example, a metal plate.

  Moreover, the main-body part 3 has the ring-shaped support member 3a which protruded outward on the outer periphery of the lower end part, By mounting this support member 3a on the back surface of the ceiling T, it is on the back surface of the ceiling T The entire downlight 10 is suspended.

  3 is a cross-sectional view showing a second embodiment of a downlight to which the present invention is applied, FIG. 4 shows a reflector used in the downlight of FIG. 3, (a) is a bottom view, and (b) is a front view. FIG. 3 and 4, the same or corresponding components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In this embodiment, the reflecting plate 2 has four upper and lower stages, each of which includes a first inclined portion 2a, a second inclined portion 2b, a third inclined portion 2c, and a fourth inclined portion 2d having different inclination angles. The structure is used. The angle α formed by the first inclined portion 2a and the second inclined portion 2b is less than 180 °, the angle β formed by the second inclined portion 2b and the third inclined portion 2c exceeds 180 °, and the third inclined portion 2c and the fourth inclined portion 2c. The angle γ formed by the inclined portion 2d is set to be less than 180 °.

  As described above, when the angle formed by the upper and lower inclined portions is a combination of less than 180 ° and more than 180 °, the light reflection directions by the inclined portions are greatly different. Compared with the embodiment, the reflected light is diffused and a wide area can be illuminated.

  Furthermore, in this embodiment, the lengths of the second and fourth inclined portions 2b, 2d are longer than any of the inclined portions in the first embodiment. Even in the same inclined portion, the angle formed with the light source lamp 1 differs depending on the position in the vertical direction, so that if the vertical length of the inclined portion is long, light is reflected over a wide range. Also from this point, this embodiment is suitable for illuminating a wide area.

  Specifically, the present embodiment is used to illuminate a wide area by arranging a plurality of downlights 10 linearly, and illuminates a region immediately below the downlight 10 with reflected light from the first inclined portion 2a. Then, the intermediate area with the adjacent downlight is illuminated with the reflected light from the second inclined portion 2b, the area immediately under the adjacent downlight is illuminated with the reflected light from the second inclined portion 2c, and the fourth inclined The far part is illuminated with the reflected light from the part 2d. Thus, in this embodiment, since the reflector 2 is set so as to illuminate a wide range, it can be illuminated using the interaction with the downlights adjacent to the left and right, Even if the installation interval of the downlight is made longer than before or the output is reduced, it is possible to obtain the same illuminance as before.

  5 is a sectional view showing a third embodiment of a downlight to which the present invention is applied, FIG. 6 shows a reflector used in the downlight of FIG. 5, (a) is a bottom view, and (b) is a front view. FIG. 5 and 6, the same or corresponding components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In this embodiment, the reflecting surface of the reflecting plate 2 has a first inclined portion 2a, a second inclined portion 2b, a third inclined portion 2c, a fourth inclined portion 2d, and a fifth inclined portion having different inclination angles. The upper and lower five-stage structure composed of 2e is used. The angle α formed by the first inclined portion 2a and the second inclined portion 2b is less than 180 °, the angle β formed by the second inclined portion 2b and the third inclined portion 2c exceeds 180 °, and the third inclined portion 2c and the fourth inclined portion 2c. The angle γ formed by the inclined portion 2d is set to be less than 180 °, and the angle δ formed between the fourth inclined portion 2d and the fifth inclined portion 2e is set to be less than 180 °.

  Even in this embodiment, since the angle formed by the upper and lower inclined portions is a combination of less than 180 ° and more than 180 °, the reflected light is diffused compared to the first embodiment in which all are less than 180 °, A wide range can be illuminated. However, in this embodiment, the angle formed by the upper and lower inclined portions is set to be close to 180 °, and is set so as to illuminate a narrower range than the second embodiment. That is, this embodiment is positioned between the first embodiment and the third embodiment.

  As described above, if a combination of angles formed by the upper and lower inclined portions of the reflector 2 is set according to the present invention, light can be appropriately reflected according to the range to be illuminated, and the illumination is performed. Depending on the power range, the light from the light source lamp can be used effectively without waste.

  The present invention can be used not only for a downlight attached to a ceiling, but also for a lighting fixture attached outdoors, on a wall surface, or on a floor surface.

It is sectional drawing which shows 1st Example of the downlight to which this invention is applied. The reflector used for the downlight of FIG. 1 is shown, (a) is a bottom view, (b) is a front view. It is sectional drawing which shows 2nd Example of the downlight to which this invention is applied. The reflector used for the downlight of FIG. 3 is shown, (a) is a bottom view, (b) is a front view. It is sectional drawing which shows 3rd Example of the downlight to which this invention is applied. The reflector used for the downlight of FIG. 5 is shown, (a) is a bottom view, (b) is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source lamp 2 Reflector 2a 1st inclination part 2b 2nd inclination part 2c 3rd inclination part 2d 4th inclination part 2e 5th inclination part 3 Main-body part 3a Support member 10 Downlight

Claims (3)

A light source lamp, and a shade-shaped reflecting plate whose inner surface is a reflecting surface for reflecting the light of the light source lamp, and the reflecting surface of the reflecting plate is formed from three or more inclined portions with different inclination angles. A lighting method by a lighting fixture, wherein each inclined portion is formed by a combination of a plurality of planes,
When illuminating the specified area intensively, the angle between the upper and lower inclined parts should be less than 180 °,
When diffusing light from a light source lamp in order to illuminate a wider area than the specified range, an illumination method in which an angle formed between upper and lower inclined portions is a combination of less than 180 ° and more than 180 °.   The length in the vertical direction of the inclined portion is shortened when illuminating the specified range in a concentrated manner, compared to the case of diffusing the light of the light source lamp to illuminate a wider range than the specified range. The illumination method described.   The lighting method according to claim 1 or 2, wherein a reflecting plate having a regular polygonal shape at any location is used as the reflecting plate of the lighting fixture.

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