JPH0388205A - Lighting fixtures with polarized panels - 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 [Industrial Field of Application] The present invention relates to an improvement in a lighting fixture having a polarizing panel, which is used by being attached to the ceiling surface of an office.

[Conventional technology]

Conventionally, lighting fixtures that are installed on the ceiling of an office where OA equipment is installed have a louver located below the light source that is installed inside a reflector to prevent glare. The same louver is used to cut glare, and when adjusting the brightness, the light source is dimmed using a dimmer.

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, according to Louva, the angle to prevent glare is fixed; for example, if you change the arrangement of desks, etc. inside a room, depending on the arrangement of office automation equipment, you may have to change the arrangement of lighting equipment to prevent reflections on the CRT. There are some things that cannot be done, and the work is time-consuming.

Therefore, it is a good idea to install a light-transmitting plate that forms a prism on the underside of the light source that is attached to the lighting fixture body.

Alternatively, a milky white acrylic plate is provided in place of the transparent plate.

[Problem to be solved by the invention]

However, if a transparent plate made of a prism or a milky white acrylic plate is installed on the bottom surface of the light source attached to the main body of the lighting equipment, the transmittance of light from the light source will be low and the equipment efficiency will be reduced. It has the disadvantage that it gets worse.

On the other hand, the reflection of OA equipment on a CRT largely depends on the mounting position of the lighting equipment, the position of one's eyes, and the angle of the CRT.

[Purpose of the invention]

The present invention was invented in view of the above points.

The transmittance of the light-transmitting plate changes depending on the angle, and when it is installed, the transmittance of light is high near the light source.

Lighting with a polarizing panel that has low light transmittance in the downward diagonal direction, has a simple structure, prevents reflections on CRTs, and maintains equipment efficiency without changing the arrangement of lighting equipment. The purpose is to provide equipment.

[Means for Solving the Problems of the Invention] In order to solve the above problems, the present invention has the following configuration. In other words, a light source is attached to the lower surface of the lighting fixture body, and a transparent plate whose transmittance changes depending on the angle is provided on the lower surface of the light source.

Further, when the light transmitting plate is installed, the light transmittance is high in the vicinity immediately below the light source, and the light transmittance is low in the diagonal downward direction.

Further, the area below the light source where the light transmittance is high and the area where the light transmittance is low can be changed by changing the light transmitting plate.

[Effect]

According to a lighting fixture having a polarizing panel having the above structure, since the transmittance of the light-transmitting plate changes depending on the angle, it is possible to prevent reflections on a CRT without changing the arrangement of the lighting fixture, and in the installed state, Since the area immediately below the light source has a high light transmittance, the efficiency of the device can be maintained.

In addition, by changing the transparent plate, the area below the light source with high light transmittance and the area with low light transmittance can be adjusted to adjust the installation position of lighting equipment, the position of the human eye, the angle of CRT, etc. The optimal range can be set according to the conditions.

〔Example〕

The invention will now be described with reference to FIGS. 1 and 2. In the figure, 1 is a lighting fixture main body.

For example, it is configured in a box shape. Reference numeral 2 denotes a reflector mounted inside the lighting device main body 1, and 3 a straight tube type fluorescent lamp mounted inside the reflector 2.
It is equipped with a fluorescent lamp. 4 is a polarizing panel arranged and arranged under the light source,
The transmittance of the light-transmitting plate changes depending on the angle, and in the installed state, the light transmittance is high in the vicinity directly below the light source, and the light transmittance is low in the diagonal downward direction. Reference numeral 5 denotes a ballast mounted inside the lighting fixture body 1.

For example, if the installation height of the lighting equipment is 250 cm, the height of the human eye is 115 cm, and the angle of the CRT is 15 degrees with respect to the vertical plane, reflection of the lighting equipment on the CRT can be prevented.

〔Effect of the invention〕

As described above, the transmittance of the transparent plate attached to the lower surface of the light source of the lighting equipment body changes depending on the angle, so it is possible to prevent reflections on the CRT without changing the arrangement of the lighting equipment. There is an effect that can be done.

Furthermore, in the installed state, the area directly below the light source has a high light transmittance, so that the efficiency of the device can be maintained.

Furthermore, the area below the light source with high light transmittance and the area with low light transmittance! 1319! By doing if, CR
It has the unique effect of being able to set an optimal range with good instrument efficiency without any reflection on the T.

[Brief explanation of drawings]

FIG. 1 is a side view of a lighting fixture having a polarizing panel according to the present invention, and FIG. 2 is a side view showing areas of the light transmitting plate in FIG. 1 with high light transmittance and low light transmittance. It is. 1...Lighting device main body 2...Reflector 3...Fluorescent lamp 4...Polarizing panel 5...Ballast Figure 1 Figure 2

Claims (1)

[Claims] 1. A lighting device in which a light source is attached to the lower surface of the lighting device body, and a transparent plate is attached to the lower surface of the light source, wherein the transparent plate changes transmittance depending on the angle, and 1. A lighting fixture having a polarizing panel, characterized in that in an installed state, the light transmittance is high in the vicinity immediately below the light source, and the light transmittance is low in the diagonal downward direction. 2. Claim 1, characterized in that the area below the light source with high light transmittance and the area with low light transmittance can be changed by changing the light transmitting plate. A luminaire having a polarizing panel as described.