JPH0590719U - lighting equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a lighting device capable of effective illumination by light having a color tone close to that of sunlight. [Configuration] A plurality of ring-shaped fluorescent lamps 1 having different emission wavelengths
2 and 3 are arranged on the same axis in an overlapping state. A ring-shaped fluorescent lamp 1 having a short emission wavelength and a large diameter is arranged above, and a ring-shaped fluorescent lamp 3 having a long emission wavelength and a small diameter is arranged below. [Effect] Since the wattage of the ring-shaped fluorescent lamp 1 having a short wavelength is set to be large and the wattage of the ring-shaped fluorescent lamp 3 having a long wavelength is set to be small, the brightness of the ring-shaped fluorescent lamps 1, 2 and 3 becomes equal, and the color tone is improved. Can obtain light close to sunlight. Therefore,
Effective illumination is possible without suppressing the amount of electric power supplied to the ring-shaped fluorescent lamps 2, 3. Further, the luminous fluxes emitted from the ring-shaped fluorescent lamps 1, 2 and 3 can be uniformly distributed in the surroundings, and the color tone is constant regardless of the irradiation direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lighting device provided in a room such as a building.

[0002]

[Prior Art]

 In the conventional lighting fixture 110 shown in FIG. 2, a blue lamp 101, a green lamp 102, and a red lamp 103 having the same rated power and different emission wavelengths are provided on the lower surface of the fixture body 104. By illuminating 102 and 103 at the same time and mixing the light emitted from them, light with a color tone close to that of sunlight is obtained. The instrument body 104 is hung on the ceiling 106 by a power cord 107 that also has an umbrella-shaped reflecting plate 105 and also functions as a hanging cord.

[0003]

[Problems to be solved by the device]

 In the luminaire 110 of the conventional example, when the blue lamp 101, the green lamp 102, and the red lamp 103 are supplied with the same amount of power, the blue lamp 101 having a shorter wavelength than the red lamp 103 has a relatively low brightness, and the red lamp 103 has a relatively short brightness. The color became strong. Therefore, the amount of electric power supplied to the green lamp 102 and the red lamp 103 must be suppressed so that the brightness of each of the lamps 101, 102, and 103 becomes equal, and effective lighting cannot be performed. Moreover, since the lamps 101, 102, and 103 are arranged on the same plane, the color tone of the light flux emitted from each of the lamps 101, 102, and 103 is changed due to the deviation depending on the irradiation direction.

An object of the present invention is to provide an illuminator that can effectively illuminate with light having a color tone close to that of sunlight.

[0005]

[Means for Solving the Problems]

 In the luminaire of the present invention, a plurality of ring-shaped fluorescent lamps having different emission wavelengths are arranged on the same axis in an overlapping state. A ring-shaped fluorescent lamp with a short emission wavelength and a large diameter is arranged above, and a ring-shaped fluorescent lamp with a long emission wavelength and a small diameter is arranged below.

[0006]

[Action]

 In the luminaire of this invention, a ring-shaped fluorescent lamp having a short emission wavelength and a large diameter is arranged above, and a ring-shaped fluorescent lamp having a long emission wavelength and a small diameter is arranged below, and the wattage of the ring-shaped fluorescent lamp having a short wavelength is increased, Since the wattage of the ring fluorescent lamp with a long wavelength is small, the brightness of each ring fluorescent lamp is the same. Further, since a plurality of ring-shaped fluorescent lamps having different emission wavelengths are arranged on the same axis in an overlapping state, the luminous flux of each ring-shaped fluorescent lamp can be uniformly dispersed in the surroundings.

[0007]

【Example】

 A lighting fixture according to an embodiment of the present invention will be described with reference to FIG. The luminaire 10 comprises a plurality of ring-shaped fluorescent lamps 1, 2 and 3 having different emission wavelengths arranged in an overlapping manner on the same axis, and a blue ring-shaped fluorescent lamp 1 having a short emission wavelength and a large diameter is placed upward. A red ring-shaped fluorescent lamp 3 having a long emission wavelength and a small diameter is arranged below.

The ring-shaped fluorescent lamps 1, 2 and 3 are held on the lower surface of the instrument body 4 by a holding spring 4 a. The green ring-shaped fluorescent lamp 2 has an emission wavelength shorter than that of the ring-shaped fluorescent lamp 1 and longer than that of the ring-shaped fluorescent lamp 3, and is arranged between the ring-shaped fluorescent lamp 1 and the ring-shaped fluorescent lamp 3. The instrument body 4 is provided with an umbrella-shaped reflection plate 5 for accommodating a stabilizer or the like (not shown) inside, and is suspended from the ceiling 6 by a power cord 7 also serving as a hanging cord.

According to the luminaire 10 configured as above, since the ring type fluorescent lamp 1 having a short wavelength has a large wattage and the ring type fluorescent lamp 3 having a long wavelength has a small wattage, each ring type has a small wattage. The brightness of the fluorescent lamps 1, 2 and 3 becomes equal, and light with a color tone close to that of sunlight is obtained. Therefore, effective illumination can be achieved without suppressing the amount of power supply to the ring-shaped fluorescent lamps 2, 3. Further, since the ring-shaped fluorescent lamps 1, 2 and 3 are arranged on the same axis so as to be overlapped with each other, the luminous flux emitted from each ring-shaped fluorescent lamp 1, 2, 3 can be uniformly distributed in the surrounding area. The color tone is constant regardless of the irradiation direction.

[0010]

[Effect of the device]

 In the luminaire of this invention, a ring fluorescent lamp with a short emission wavelength and a large diameter is arranged above, and a ring fluorescent lamp with a long emission wavelength and a small diameter is arranged below, so that the wattage of the ring fluorescent lamp with a short wavelength is reduced. Since the ring fluorescent lamp with a large wavelength and a long wavelength has a small number of watts, the brightness of each ring fluorescent lamp is the same, and light with a color tone close to that of sunlight can be obtained. Therefore, effective illumination can be achieved without suppressing the amount of power supplied to the ring-shaped fluorescent lamp having a long emission wavelength. In addition, because multiple ring-shaped fluorescent lamps with different emission wavelengths are arranged on the same axis in an overlapping state, the luminous flux emitted from each ring-shaped fluorescent lamp can be evenly distributed around the circumference, and the irradiation Color tone is constant regardless of direction.

[Brief description of drawings]

FIG. 1 is a sectional view of a lighting device according to an embodiment of the present invention.

2A is a cross-sectional view of a conventional lighting fixture, and FIG. 2B is a bottom view thereof.

[Explanation of symbols]

 1 ring type fluorescent lamp 2 ring type fluorescent lamp 3 ring type fluorescent lamp

Claims (1)

[Scope of utility model registration request] 1. A luminaire comprising a plurality of ring-shaped fluorescent lamps having different emission wavelengths, which are arranged on the same axis in an overlapping state,
A ring-shaped fluorescent lamp with a short emission wavelength and a large diameter is placed above
A luminaire characterized in that a ring-shaped fluorescent lamp having a long emission wavelength and a small diameter is arranged below.