JPH04363802A - Lighting fixture - Google Patents

Abstract

PURPOSE:To easily provide white light without dimming each color lamp. CONSTITUTION:In a lighting fixture comprising a plurality of color lamps 2 and a translucent cover 3 laid thereunder, a reflecting plate 5 is so formed that the brightness of each color lamp 2 on the surface of the panel 3 is approximately uniform from the one end of the panel 3 to the other end. In addition, a distance between each color lamp 2 and the panel 3 is changed, depending upon a lamp beam. According to this construction, brightness at every color lamp 2 becomes approximately uniform on the surface of the panel 3, and the beam of each color lamp 2 on the panel 3 is made to have a suitable intensity value for providing white color by changing a distance between the lamp 2 and panel 3. As a result, white light can be provided very easily by normal lighting without dimming each lamp 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device in which color lamps of a plurality of colors are housed inside the device body, and a transparent panel is disposed on the lower surface of the color lamps.

0002

2. Description of the Related Art FIGS. 3 and 4 show a conventional lighting device, in which the inner surface of a substantially box-shaped device body 1 having an opening at one end is colored with three primary colors, for example, red R, green G, and blue B. lamp 2
A light-transmitting panel 3 such as a milky-white panel is arranged in the opening of the fixture body 1 which is the lower side of the color lamp 2, and it is shown attached to the ceiling 4. .

[0003] The color lamps 2 of multiple colors are disposed at positions approximately equidistant from the upper surface 1a of the device body 1 via sockets or the like, and the color lamps 2 are arranged at positions approximately equidistant from the upper surface 1a of the device main body 1. 2 and the transparent panel 3 are kept large.

Each of the color lamps 2 is moderately dimmed by a dimmer or the like and outputs white light from the translucent panel 3. For example, if the green G light is weak, the red R and blue B light can be adjusted appropriately. It was designed to increase the intensity of the light to produce white light.

[0005]

[Problems to be Solved by the Invention] However, in the conventional lighting equipment configured as described above, in order to emit white light, it is necessary to appropriately adjust the brightness of each of the color lamps 2 of a plurality of colors. The problem was that it was not easy for anyone to control how they received light.

Another problem is that in order to eliminate uneven brightness on the three surfaces of the light-transmitting panel, it is necessary to increase the distance between each color lamp 2 and the light-transmitting panel, and to increase the height of the device body 1. there were.

The present invention has been made in view of the above-mentioned background, and its object is to provide a lighting fixture that can easily provide white light without the need for dimming a color lamp.

[0008]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention has a color lamp 2 of a plurality of colors built into the inner surface of a device main body 1 which is open at least at one end, and a light-transmitting device on the lower surface side of the color lamp 2. In the lighting equipment in which the panel 3 is arranged, the light-transmitting panel 3 by each color lamp 2 is
The reflector plate 5 is formed so that the brightness on the surface is substantially uniform from one end of the light-transmitting panel 3 to the other end, and the distance between each lamp 2 and the light-transmitting panel 3 is set so that the brightness of each color lamp 2 is approximately uniform. It is characterized in that it changes depending on the lamp luminous flux.

[0009]

[Function] In the lighting device of the present invention, color lamps 2 of a plurality of colors are built into the inner surface of the device main body 1 which is open at least at one end, and a transparent panel 3 is disposed on the lower surface side of the color lamp 2. In the lighting equipment, the reflector plate 5 is formed so that the brightness of each color lamp 2 on the surface of the transparent panel 3 is approximately uniform from one end of the transparent panel 3 to the other end, and Translucent panel 3
Since the distance between the two color lamps 2 is changed according to the lamp luminous flux of each color lamp 2, the brightness of each color lamp is approximately uniform on the 3 sides of the translucent panel, and the brightness of each color lamp when normally lit is The luminous flux on the surface of the transparent panel 3 is also set to an appropriate value in order to obtain white light by changing the distance between each color lamp and the transparent panel, and for this reason, each color lamp 2 is not dimmed. , it is extremely easy to obtain white light just by turning on the lamp.

0010

[Embodiment] Figs. 1 and 2 show an embodiment of the present invention. This lighting equipment has color lamps 2 of multiple colors built into the inner surface of the equipment main body 1 which is open at least at one end. A light-transmitting panel 3 is disposed on the lower surface side of the lamp 2 at the opening of the apparatus main body 1, and a reflecting plate 5 is disposed on the apparatus main body 1 side of each color lamp 2. be.

Each color lamp 2 has, for example, red R, green G,
Three types of color lamps 2 having the three primary colors of blue B are attached to the upper surface 1a of the device main body 1 via a socket etc.
The distance from the upper surface 1a is set to be changed according to the luminous flux of each color lamp so that the luminous flux of each color lamp is appropriate for obtaining white light on the transparent panel 3 surface.

The reflector plate 5 is disposed above each color lamp 2 and on the upper surface 1a side of the device main body 1, and as shown in FIG. The luminance is formed to be substantially uniform from one end of the transparent panel 3 to the other end.

[0013] In this way, the color lamps 2 of a plurality of colors are built into the inner surface of the main body 1 which is open at least at one end.
In a lighting fixture in which a light-transmitting panel 3 is disposed on the lower surface side of the color lamp 2, the luminance of each color lamp 2 on the surface of the light-transmitting panel 3 is approximately the same from one end of the light-transmitting panel 3 to the other end. In addition, the distance between each color lamp 2 and the transparent panel 3 is changed according to the lamp luminous flux of the color lamp 2 of each color, so that the surface of the transparent panel 3 is The brightness of each color lamp 2 is approximately uniform, and the luminous flux on the surface of the transparent panel 3 when each color lamp 2 is normally lit (100% lighting without dimming) is also different from that of each color lamp 2. By changing the distance of the light panel 3, it is set to an appropriate value to obtain white light. Therefore, by simply lighting each color lamp 2 normally without adjusting the dimming, white light can be obtained extremely easily. can get.

[0014] In the above-mentioned embodiment, a lighting fixture is exemplified in which white light is obtained using lamps of the three primary colors of red R, green G, and blue B as the color lamps 2, but the present invention is not limited to this. Of course, for example, it may be a lighting fixture that is set to obtain any light color using two color lamps.

[0015]

[Effects of the Invention] As described above, in the lighting device of the present invention, color lamps of multiple colors are built into the inner surface of the device main body which is open at least at one end, and a light-transmitting panel is disposed on the lower surface side of the color lamp. In lighting fixtures such as Since the distance between the panels is changed according to the lamp luminous flux of each color lamp, the brightness of each color lamp is approximately uniform on the transparent panel surface, and the brightness of each color lamp is approximately uniform on the transparent panel surface when normally lit. The luminous flux of each color lamp is set to an appropriate value in order to obtain white light by changing the distance between each color lamp and the transparent panel. Therefore, each color lamp is not dimmed and is normally lit. White light can be obtained extremely easily by simply

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view showing one embodiment of the present invention.

FIG. 2 is a distribution diagram of panel surface brightness for each color lamp same as above.

FIG. 3 is a perspective view of a conventional lighting fixture.

FIG. 4 is a cross-sectional side view of the same as above.

[Explanation of symbols]

1　Appliance body 2 Color lamp 3 Translucent panel 5 Reflector plate

Claims (1)

[Claims] Claim 1: A lighting device in which color lamps of a plurality of colors are housed in the inner surface of the device main body with at least one end open, and a light-transmitting panel is disposed on the lower surface side of the color lamps, in which each of the color lamps of each color A reflecting plate is formed so that the brightness on the surface of the transparent panel is approximately uniform from one end of the transparent panel to the other, and the distance between each color lamp and the transparent panel is set so that the brightness on the surface of the transparent panel is approximately uniform from one end of the transparent panel to the other end. A lighting device characterized by changing the luminous flux of the lamp.