JPS5914841B2 - lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-lamp parallel type lighting fixture having a specular reflective surface.

Lighting equipment in which the surface of the reflector plate is a specular reflective surface for light distribution control has the following drawbacks due to the reflective characteristics of the reflector plate.

Figure 1 shows a conventional example, in which two linear light sources 1.1 installed in parallel are connected above and to the sides by reflectors 2.
At the same time, the lower edge of the reflecting plate 2 is positioned below the linear light source 1, and glare cutting processing is performed to prevent the linear light source 1 from entering the normal line of sight range (glare zone) of humans. However, if the entire surface of this reflector plate 2 is made into a specular reflective surface 3, when this lighting fixture is viewed from the direction of the arrow, the brightness of the specular reflective surface 3 is extremely low compared to the linear light source 1. The contrast is too large and becomes uncomfortable.

The present invention has been made in view of these points, and the objective of the present invention is to provide a dice that maintains the illumination advantages of having a mirror-reflecting surface while producing the high contrast described above. To provide a lighting device which has a specular reflective surface with appropriate brightness and can provide a comfortable viewing environment.

The present invention will be described in detail below based on illustrated embodiments.
, 4' are diffuse reflection surfaces, and 3, 3' are specular reflection surfaces, and the diffuse reflection surfaces 4, 4' and the specular reflection surfaces 3, 3' are mixed on the surface of the reflector plate 2.

Here, the diffuse reflection surface 4, 4' is the surface of the reflection plate 2 located between the two linear light sources 1, 1 installed in parallel, and the surface of the remaining reflection plate 2 is the specular reflection surface 3, 3'.

If you look at this lighting fixture from the direction of the arrow in FIG. 3, you will see the linear light source 1, the diffuse reflection surface 4 with appropriate brightness, and the other linear light source 1.

Next, the diffuse reflection surface 4 is reflected, the specular reflection plate 3' having an appropriate brightness, and the ceiling surface 5 can be seen.

In other words, when looking up at the lighting equipment, the specular reflection surfaces 3, 3
Since the diffuse reflection surfaces 4 and 4' are reflected in ′, the linear light source 1
There is no high contrast between the two.

Note that the shaded area in FIG. 4 indicates the diffuse reflection surface 4.

In addition, from the point of view of light distribution, in the conventional example, as shown in FIG. As shown in the figure, although the light distribution blocks light in the range of 60° to 90°, there is diffused light from the diffuse reflection surface 4°4.
The light distribution curve bulges, and this bulge, as shown in the glare control curve, is the key to providing comfort.

As described above, in the present invention, in a lighting fixture in which two linear light sources installed in parallel are each surrounded by a reflecting plate above and on the sides, the surface of the reflecting plate located between both linear light sources is diffused. Since it is a reflective surface and the remaining reflector surface is a specular reflective surface,
In addition to being able to brightly illuminate the position below the light source by directly reflecting the linear light source on the specular reflective surface, by forming the surface of the reflector plate located between both linear light sources with a diffuse reflective surface, it is possible to Since the reflective surface diffusely reflects the light from the light source, the diffuse reflective surface will appear brighter when the light source is viewed from below the light source or from a location away from the lower position of the light source.
In addition, the specular reflective surface also appears brighter because the light from the diffuse reflective surface is reflected, reducing the difference between the brightness of the light source and the brightness of the reflector surface. This prevents the brightness contrast from becoming too large even when viewing the screen, and provides comfortable illumination with appropriate brightness in each part.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the conventional example, Fig. 2 is a perspective view of the same as above, and Fig. 3 is a sectional view of the conventional example.
The figure is a sectional view of one embodiment of the present invention, and FIG. 4 is a perspective view of the same as above.
5A and 5B are light distribution characteristic diagrams, where a shows a conventional example, b shows an example, 1 is a linear light source, 2 is a reflecting plate, 3 and 3' are specular reflection surfaces, and 4 and 4 ′ is a diffuse reflection surface.

Claims (1)

[Claims] 1 Parallel: This is a lighting fixture in which two linear light sources are installed, each of which is surrounded by a reflecting plate above and on the sides, and the surface of the reflecting plate located between both linear light sources is a diffuse reflection surface, and the remaining reflection A lighting fixture characterized by a plate surface having a mirror-reflecting surface.