JP2002190391A - Automatic dimming system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a conventional automatic dimming system that controls the output of a lighting fixture so that the luminance in a detection area measured by a luminance sensor installed on a ceiling is constant, a desk top, equipment,
Due to differences in light reflectivity and the like on surfaces such as furniture and fixtures, the brightness in the detection area detected by the brightness sensor changes, which affects output control, for example, the height of the desk top is the same. Also the illuminance will be different,
The disadvantage that desired illuminance cannot be obtained is likely to occur. According to the present invention, a lighting output controller (2) includes:
A receiving unit 4 for receiving a signal from the wireless illuminometer 3 is configured. The receiving unit is installed on the ceiling, and receives a signal from the wireless illuminometer placed on the surface for setting the illuminance. We propose an automatic dimming system that controls output. In this system, it is preferable that the illumination output controller or the wireless illuminometer is provided with a timer for intermittently controlling the illumination output.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic light control system for indoor lighting.

[0002]

2. Description of the Related Art A conventional automatic light control system for controlling the output of a lighting device so as to maintain a constant illuminance on a device such as a desk surface or a personal computer in room lighting is shown in FIG. 2, for example. .

[0003] This automatic dimming system includes a luminance sensor a
A suitable lighting output controller b having a brightness sensor is set on the ceiling, the detection area of the brightness sensor is set on a device such as a desk surface or a personal computer, and the lighting is controlled so that the brightness in the detection area is kept constant at the set value. The output controller b controls the output of the lighting fixture c to secure a constant illuminance. still,
Reference numeral d denotes an output setting remote controller for setting the illuminance. The signal of the output setting remote controller d is received by, for example, a receiving unit provided in the illumination output controller a to set the output of the illumination output controller.

[0004]

When setting the illuminance on a desk surface or a device such as a personal computer using such an automatic light control system, differences in light reflectance etc. on the surface of the desk surface, devices, furniture and fixtures, etc. As a result, the luminance in the detection area detected by the luminance sensor changes, which affects the output control. For example, even if the height of the desk surface is the same, the illuminance differs. The disadvantage is that it cannot be obtained. An object of the present invention is to solve such a problem.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a receiving unit for receiving a signal from a wireless illuminometer is provided in an illumination output controller, and the receiving unit is installed on a ceiling. Then, an automatic dimming system is proposed in which a signal from a wireless illuminometer placed on an illuminance setting surface is received by a receiving unit to control output of a lighting fixture.

According to the present invention, it is proposed that the illumination output controller or the wireless illuminometer in the above-described configuration is provided with a timer for intermittently performing output control.

According to the present invention, an illuminance meter is placed on a surface on which an illuminance is to be set, and the illumination output controller is controlled wirelessly so that the illuminance measured by the illuminance meter becomes a set value. There is no difference in illuminance even when the light reflectance on the surface of equipment, furniture, fixtures, etc. is different. For this reason, the difference in illuminance does not occur on the desk surface having the same height.

If the output control is performed at regular time intervals measured by the timing means, frequent output control can be performed to prevent flickering due to fluctuations in illuminance in a short time.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 conceptually shows the entire configuration of an automatic light control system according to the present invention. Reference numeral 1 denotes a lighting fixture, and the lighting fixture 1 is configured to control the output by an appropriate lighting output controller 2. Reference numeral 3 denotes a wireless illuminometer. The wireless illuminometer 3 is configured to wirelessly transmit a signal corresponding to the measured illuminance by infrared rays, radio waves, or the like. 2.

In the above configuration, when setting the illuminance in the indoor lighting, the wireless illuminometer 3 is placed on a surface on which the illuminance is to be set, such as a desk surface 5 or a personal computer.

A signal corresponding to the illuminance measured by the wireless illuminometer 3 is input to the illumination output controller 2 via the receiving unit 4 and output control is performed. The output of the lighting fixture 1 is controlled such that the illuminance measured by the wireless illuminometer 3 becomes a set value as compared with a desired illuminance.

Therefore, there is no difference in illuminance even if the light reflectance on the surface of the desk or on the surface of equipment, furniture, furniture or the like is different, and there is no difference in illuminance on the desk with the same height.

When daylight shines into the room and the surface for setting the illuminance is illuminated thereby, the luminaire 1
Output is reduced, and energy saving can be achieved by reducing the input energy of the lamp.

Here, the setting of the illuminance may be performed on the wireless illuminometer 3 side or on the illumination output controller 2 side.

In the former case, for example, means for setting the illuminance in the wireless illuminometer 3, its storage means, and
Means for comparing the measured value and the set value is configured, and a signal of the comparison result is input to the illumination output controller via the receiving unit 4 to perform output control.

On the other hand, in the latter case, for example, the wireless illuminometer 3 transmits the measured illuminance signal, and sets the illuminance in the illumination output controller 2;
Output control can be performed by configuring the storage unit and a unit that compares a measurement value from the wireless illuminometer 3 with a set value set in the storage unit, and output control can be performed.
This can be performed by an output setting remote controller or the like for setting the illuminance as in the conventional example.

Assuming that the illuminance setting operation as described above is performed continuously, the output of the luminaire 1 is controlled every time the measured value of the wireless illuminometer 3 changes for some reason. Output control may cause problems such as flickering.

Therefore, in this case, the illumination output controller 2
Alternatively, the wireless illuminometer 3 is provided with a timer (not shown) for intermittently controlling the illumination output. This timing means can be constituted by a timer or a counter.

In such a configuration, even if there is a change in the illuminance in the wireless illuminometer 3, the time measured by the time counting means, that is, the time from the time immediately before the output was controlled, exceeds the set time. If there is no output control, the output control is not performed, and the output control is performed when the set time is reached. Therefore, frequent output control and occurrence of flicker can be prevented.

[0020]

The automatic light control system of the present invention is as described above, and has the following effects. a. There is no difference in illuminance even when the light reflectance on the surface of the desk, equipment, furniture, furniture, etc. is different, and there is no difference in illuminance on the desk with the same height. b. If the output control is performed at regular time intervals measured by the timer, frequent output control can be performed to prevent flicker due to fluctuations in illuminance in a short time. c. Automatic dimming suitable for the indoor environment is performed to maintain a desired illuminance, and by correcting the initial illuminance and using daylight, it is possible to reduce the input energy of the electric lamp and save energy.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram conceptually showing the overall configuration of an automatic light control system according to the present invention.

FIG. 2 is an explanatory diagram conceptually showing an example of the entire configuration of a conventional automatic light control system.

[Explanation of symbols]

 Reference Signs List 1 lighting equipment 2 lighting output controller 3 wireless illuminometer 4 receiving unit 5 desk top

Claims (2)

[Claims] An illumination output controller includes a receiving unit for receiving a signal from a wireless illuminometer, and the receiving unit is installed on a ceiling and a signal from the wireless illuminometer placed on a surface for setting illuminance. Automatic light control system characterized in that the output of a lighting fixture is controlled by receiving the light in a receiving unit. 2. The automatic dimming system according to claim 1, wherein the illumination output controller or the wireless illuminometer is provided with timing means for intermittently performing output control.