JPH0334202A - Light distribution variable type lighting equipment - Google Patents

Abstract

PURPOSE:To provide illumination with a plurality of light distribution by providing a light control panel on the lower surface of a light source. CONSTITUTION:The lower surface of a light source 3 installed to the inner part of a reflector 2 mounted on the inside of a body is covered with a light control panel 4. The voltage of the panel 4 is controlled to adjust transparency, whereby light distributions of strong illuminating form, wide illuminating form and intermediate form thereof can be obtained. As the light control panel, for example, those formed by putting, between two electrode base plates, a liquid crystal in which the longitudinal axis of the molecule is arranged in parallel to the base plates are used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a variable light distribution lighting fixture that is used by being attached to a ceiling surface of an office or the like.

[Conventional technology]

Conventionally, in order to prevent glare, lighting fixtures that are mounted on office ceilings, etc., have a louver located in front of the light source that is mounted inside a reflector, and the louver cuts glare. Furthermore, when adjusting the brightness, the light source is dimmed using a dimmer.

[Problem to be solved by the invention]

However, if the brightness of the louver or light source is adjusted using a dimmer, the structure would be complicated and the price would be high. Furthermore, although louvers can prevent glare from a specific direction, they cannot prevent glare as a whole and have the disadvantage that they cannot significantly change the image.

Furthermore, conventional lighting equipment has been provided with a light shield that covers the lower surface of the light source mounted inside the lighting equipment to provide indirect illumination.

However, using completely indirect lighting has the disadvantage that you have to change the interior layout of the room and replace the lighting equipment if you want direct lighting.

[Purpose of the invention]

The present invention was invented in view of the above points, and the transparency of the light control panel attached to the bottom surface of the light source is 1! ! An object of the present invention is to provide a variable light distribution lighting fixture configured to obtain illumination with different light distributions using a single lighting fixture.

[Means for the invention to solve the problem]

In order to solve the above problems, the present invention has the following configuration. In other words, a light source is installed inside the reflecting mirror, and a dimming panel is placed below the light source.

The transparency of the dimming panel is adjusted by adjusting the voltage of the dimming panel.

Then, the configuration is such that the - lighting fixtures provide illumination with different light distributions.

[Effect]

According to the variable light distribution lighting fixture having the above structure, by adjusting the voltage of the dimming panel provided on the bottom surface of the light source, the transparency of the dimming panel covering the light source can be adjusted.
You can get different lighting of the image.

[Embodiment] The present invention will be explained below with reference to FIGS. 1 to 4. In FIG. 0, 1 is a lighting fixture main body, which is configured, for example, in a box shape. Reference numeral 2 denotes a reflector mounted inside the lighting device main body 1, and is configured to have, for example, a strong illumination type or a wide illumination type. 3 is a light source installed inside the reflector 2,
For example, it is constructed using a 40 watt straight tube type fluorescent lamp.

4 is a light control panel configured to cover the lower surface of the light source,
For example, it is constructed using a liquid crystal light control panel. In addition, the synchronized light control panel is, for example, a flat plate. It's J. Furthermore, by configuring a prism on the surface of the tunable light control panel, when the light control panel is made nearly transparent, it is possible to illuminate without a lamp image.

By increasing the transparency of the light control panel in a lighting fixture with the above structure, it is possible to achieve a wide illumination type light distribution as shown in Figure 2 or a strong illumination type light distribution as shown in Figure 3. .

Further, by reducing the transparency of the light control panel, an intermediate light distribution can be obtained.

The light control panel used has a structure in which, for example, a liquid crystal whose long axes of molecules are arranged parallel to the substrates is sandwiched between two electrode substrates.

Reference numeral 5 denotes a ballast mounted inside the lighting fixture body 1.

〔Effect of the invention〕

As described above, the present invention is configured using a light control panel on the bottom surface of the light source, so by adjusting the voltage of the light control panel, the transparency of the light control panel can be easily changed, and multiple layouts with different images can be created. It has the advantage of being able to provide light illumination.

[Brief explanation of drawings]

FIG. 1 is a side view of a variable light distribution lighting fixture according to the present invention, and FIGS. 2 to 4 show a variable light distribution by changing the voltage of the dimming panel of the variable light distribution lighting fixture of FIG. 1. This is a light distribution diagram when ■...Lighting equipment body 2...Reflector 3...Light source 4...Dimmer panel 5...Ballast Figure 1

Claims (1)

[Claims] 1. A light source is installed inside a reflecting mirror, a light control panel is provided covering the bottom surface of the light source, and the transparency of the light control panel is adjusted to distribute light using one lighting fixture. A variable light distribution lighting fixture characterized in that it is configured to obtain different types of illumination. 2. The light distribution system according to claim 1, characterized in that the transparency of the liquid crystal light control panel is adjusted by adjusting the voltage of the liquid crystal light control panel on the lower surface of the light source. Transforming lighting equipment.