JPS60249203A - Lighting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a lighting device that can freely change the color of light.

(Background Art) Light sources that have been widely used in the past include incandescent light bulbs and fluorescent lamps. The emitted color of these light sources is usually
Each light source is unique, and it is impossible to achieve multiple emitted light colors with one light source. Therefore, if you want to vary the light color of illumination in the same illumination space,
A method is used in which a plurality of light sources emitting light of different colors are installed together and each of these is blinked or dimmed.

Such a conventional example is shown in FIGS. 1 and 2. In Figure 1, 1a and 1b are two color incandescent light bulbs with different shapes attached to them, and these are light-transmitting and diffusive (for example, 7
It is arranged in a case 2 having a 0-stroke carnivorous glass). Similarly, FIG. 2 shows three fluorescent lamps "3a, 3b, 3" each coated with phosphors of different luminescent colors.
c is arranged inside the light transmitting diffusion case 4. All of these attempts to obtain light emitted from a plurality of color light sources inside the case as mixed color light using a light-transmitting and diffusive case.

However, with such conventional methods, improving color mixing generally results in a large loss of transmitted light, and conversely, improving transparency means that the colors emitted from each light source inside the case can be seen through, making it impossible to achieve sufficient color mixing. There were contradictory issues.

(Object of the Invention) The present invention has been made in view of the above points, and its object is to provide a flat lighting device that has excellent color mixing properties and can provide an extremely uniform light color. .

(Disclosure of the Invention) The basic configuration of the present invention is shown in FIG. In the figure, reference numeral 6 denotes a surface emitting conversion device, and along the end surface of this device, fluorescent lamps 5a and 5b, each emitting light of a different color, are placed close to each other, so that the dimming of each can be controlled according to the sentence.

Next, the principle of operation of the present invention will be explained with reference to FIG. First, the surface emitting conversion device 6 has a general structure in which a light reflecting film 7 is formed on the lower surface of a transparent plate 8 (eg, acrylic), and has already been put into practical use in some cases. The lights 9a and 9b from the fluorescent lamps 5a and 5b disposed on the end face of the surface emitting conversion device 6 travel inside the transparent plate 8, mix with each other, and are emitted from the upper face by the reflective film 7. . The loss of light within the transparent plate 8 is small, and the incident light 9a from each lamp.

Since 9b is almost uniform over the entire surface, the emitted light 10
The flesh incident light 9a, 9b becomes uniformly mixed color light.

FIG. 5 is a simplified diagram showing an embodiment of the present invention, in which a mirror surface 11 is provided on the end surface of the surface emitting conversion device 6 on which the lamp is not installed.
is formed to prevent light loss from inside. Further, by disposing a reflector plate around the lamps 5a and 5b, the light emitted from the lamps 5a and 5b is efficiently focused on the surface emitting conversion device 6, and the lamps 5a and 5b are That thing is no longer visible,
Only the uniform light-emitting surface is visible.

It should be noted that the present invention is not limited to the basic configuration and embodiments described above, and it is of course possible to use three or more fluorescent lamps that are linear light sources, for example.

An embodiment in which three wires are used is shown in FIGS. 6 to 8.

Furthermore, the light source is not limited to a fluorescent lamp. For example, as shown in FIG.
3a, 13b, 13c, etc. may also be used.

Regarding the emitted mixed color light, for example, as shown in the chromaticity coordinates in Fig. 10, if the emission colors of the three types of light sources are red (RJ, green CG) and blue (B), respectively, the point R , G, and B. Any light color can be obtained within the triangular region connecting , G, and B. Note that the emission colors of the three types of light sources are not limited to the emission colors of R, G, and wavelengths at 8 points in the above chromaticity coordinates, and the wavelengths are 400 to 500 nm, respectively.
, 500 to 600 nm, or 600 to 7QQ nm, of course.

(Effects of the Invention) As described above, the present invention provides a lighting device using a surface emitting conversion device in which one side of a transparent plate-like body is formed of a reflective layer and the incident light from the end face is uniformly emitted from the other face. Since a plurality of light sources emitting light of different colors are disposed on the end face of the surface emitting conversion device, and the amount of light emitted from each of the light sources is individually controlled, the light emitted from the emission surface is It was possible to provide an illumination device in which colors are mixed extremely uniformly through a light emission conversion device, and the color tone of the mixed color light can be freely changed.

[Brief explanation of drawings]

Figures 1 and 2 are simplified diagrams of the conventional example, Figure 3 is a simplified diagram showing the basic configuration of the present invention, Figure 4 is a diagram explaining the principle of operation of the same, and Figure 5 is an embodiment of the present invention. Simplified diagram showing examples, No. 6
9 to 9 are simplified diagrams showing different embodiments of the present invention, and FIG. 10 is a chromaticity coordinate (5). 5... Light source, 6... Surface emission conversion device, 7... Reflective layer. 8...Transparent plate. Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Toshimaru Takemoto (and 2 others) (6) Figure 6 Figure 7 0 Figure 8 Japanese Patent Application Publication No. 2006-0249203 (4) Figure 9 3c Figure 10 r)

Claims (1)

[Claims] (1) An illumination device using a surface emitting conversion device in which one surface of a transparent plate-like body is formed of a reflective layer and uniformly emits incident light from an end surface from the other surface, the end surface of the surface emitting conversion device A lighting device comprising: a plurality of light sources emitting light of different colors; and the amount of light emitted from each of the light sources being controlled separately.