JPH11283754A - Task lighting system and task ambient lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a task lighting system and a task ambient lighting system expected to realize energy saving. SOLUTION: This task lighting system is provided with a task luminaire 1 having a luminaire body and a light source set in the luminaire body and illuminating an working area, a light sensor part 2 sensing mainly the light except light irradiated from the task luminaire 1 and outputting a signal, and a dimmer means 1c controlling light output of the light source set in the luminaire body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a task lighting device and a task ambient lighting device in a general office space such as an office.

[0002]

2. Description of the Related Art Task / ambient lighting refers to a task lighting device arranged to illuminate a work surface on a desk surface or a VDT and its vicinity, and furthermore, a room interior surface other than the lighting device. A method of illuminating with a lighting device such as a general lighting device or a lighting device such as an upper light placed on a floor placed on a ceiling surface for lighting a surrounding area such as an upper light.

[0003] In the conventional task / ambient lighting, the task lighting fixture is turned on / off in accordance with the use situation of an individual, and is used in an auxiliary manner. And recent research reports that the balance between the brightness of task lighting and ambient lighting affects the satisfaction of workers, etc. (for example, "Study on the optimality of task and ambient lighting in offices" Yumiko Tanaka et al., Architectural Institute of Japan Annual Meeting, September 1994, pp.
1037-1038).

[0004]

The above-mentioned report includes TA
The table shows that the ratio is optimal when the ratio of the desk top illumination by the task lighting / the desk top illumination other than the task lighting is 1.25, and when the ratio exceeds 2.0, the degree of dissatisfaction increases.

[0005] In the conventional task lighting, there is almost no switching of brightness or a step light control method. In particular, at night or the like, ambient illuminance is reduced due to no natural light from a window. When is lit, T
The A ratio is increased, and the brightness of the uncomfortable viewing environment is balanced, in other words, energy is wasted.

An object of the present invention is to provide a task lighting device and a task ambient lighting device which can be expected to save energy.

[0007]

According to the first aspect of the present invention, there is provided a task lighting device having a fixture main body and a light source disposed on the fixture main body for illuminating a work area; An optical sensor unit that mainly detects light of the light and outputs a signal; based on a signal from the optical sensor unit,
Dimming control means for controlling the light output of the light source provided in the appliance body.

According to a second aspect of the present invention, in the task illuminating device according to the first aspect, the optical sensor section is disposed upwardly above the task luminaire.

According to a third aspect of the present invention, there is provided a task lighting device having a fixture main body and a light source disposed on the fixture main body for illuminating a work area; and mainly detecting light other than light emitted from the task lighting fixture. An optical sensor unit that outputs a signal; a second optical sensor unit that mainly senses light emitted from the task lighting device; and an appliance body based on signals from the optical sensor unit and the second optical sensor unit. And dimming control means for controlling the light output of the light source disposed in the light source.

A fourth aspect of the present invention provides an ambient lighting fixture that provides ambient illuminance (A) by illumination from a device other than the task illuminating device; a task illuminance (T) by illuminating a work area, and a TA ratio. Is 1.0
The task lighting device according to any one of claims 1 to 3, wherein the dimming control means controls the light output of a light source provided in the fixture main body so that the light output becomes 2.0. It is characterized by.

According to a fifth aspect of the present invention, in the task / ambient lighting device according to the fourth aspect, there is provided a human sensor for detecting the presence of a person.

The terms used in each invention will be described below.
First, the work area is defined as, for example, a desk surface, a VDT, and its vicinity in a work space such as a general office.

[0013] The illumination of the work area or the like is called task illumination, and the lighting fixture that embodies these is called a task lighting fixture or a task light.

In task / ambient lighting, lighting other than task lighting is called ambient lighting.
Lighting equipment that embodies this is called ambient lighting equipment.

[0015] The surface of the desk (usually 70 (cm) above the floor)
(A horizontal work area), the average desk surface illuminance obtained by the ambient illumination and the task illumination is referred to as an ambient illuminance (A) and a task illuminance (T), respectively, and the total illuminance thereof is referred to as a total illuminance.

The TA ratio is the ratio of the task illuminance (T) to the ambient illuminance (A) under a certain condition (desk surface illuminance / desk surface illuminance other than task illumination).

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A task / ambient lighting device according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic layout diagram of a task / ambient lighting device showing one embodiment of the present invention.

In the figure, a task / ambient lighting device has a fixture main body 1a and a light source 1b disposed on the fixture main body, and a task lighting fixture 1 for illuminating a work area, and a light other than light emitted from the task lighting fixture. Mainly senses light,
A task lighting device having dimming control means 1c for controlling the light output of the light source based on the signals from the light sensor unit 2 and the light sensor unit for outputting a signal, and lighting from sources other than the task lighting device. And an ambient lighting fixture 3 that provides an ambient illuminance A.

Here, in the task lighting, the light sensor unit 2 is located at a position where the light emitted from the task lighting device 1 is not received, for example, a shade 1 covering the light source 1b of the task lighting device 1.
It is installed on the upper surface of d. The optical sensor unit 2 senses the illuminance of the desk surface by the ambient lighting 3. The positions of the desk surface 4 and the optical sensor unit 2 differ by about 50 (cm) in the vertical direction, but the relationship between the illuminance on the optical sensor unit 2 and the illuminance on the desk surface 4 must be related in advance using a look-up table (table). Thus, the ambient illuminance can be sensed.

The task lighting device (task light) is provided with a lighting control controller, which is a dimming control means capable of continuous dimming. The relationship between the light output (%) measured at a distance of 10 cm) and the desk surface illuminance is related in a look-up table, and the task illuminance at a specific light output (%) can be known.

Further, in the present task lighting device, by installing the second optical sensor unit 5 for sensing the brightness in the work area, the total illuminance is detected, and the above-described ambient illuminance is subtracted, thereby reducing the task illuminance. Provide a mechanism that can be sensed.

In this case, in a situation where the task illuminance can be accurately obtained, for example, when the operator moves and uses the task illuminating device at a position other than the standard position (about 50 (cm) above the desk surface 4). From the mechanism, get the ambient illuminance. Then, the light output of the task lighting device is appropriately controlled from the ambient illuminance via the lighting control controller. The control method is described below.

FIG. 2 is a graph showing the time course of the task and the ambient illuminance. The ambient illuminance is set to 200 (lx). In the daytime work, the ambient illuminance becomes 800 by using natural light or the like.
(Lx).

In the task lighting device, the TA ratio is set to 2.
The task illuminance is initially set to 400 (l
The light output (%) is set so as to satisfy x). As the ambient illuminance increases, the task illuminance also increases by 100.
(%) The lighting state rises to a state of lighting (in this state, a task illuminance of 1000 (lx) is obtained).

FIG. 3 is a graph showing the task illuminance, the total illuminance, and the TA ratio. In this graph, the ambient illuminance (horizontal axis) is from 200 (lx) to 600 (l).
1 in the setting table of the task illuminance when changing to x)
One.

(1) Ambient illuminance 200 to 250
(Lx) range: Here, the output of the task lighting is controlled so that the TA ratio becomes 2.0. In this range, the total illuminance does not exceed 750 (lx).

(2) Ambient illuminance 250 to 375
Range of (lx): Here, total illuminance is 750 (lx)
Control the output of task lighting to maintain As a result, the output of task lighting can be suppressed and energy can be saved. During this time, the TA ratio varies up to 1.0, but does not fall below 1.0.

(3) Ambient illuminance 375 (lx) or more: Task illumination is controlled so as to maintain a TA ratio of 1.0 in this range. Of course, some workers may determine that task lighting is unnecessary. In this case, the task lighting can be turned off. In addition, a human sensor that detects the presence of a person
6 can be installed to automatically turn on / off task lighting or ambient lighting depending on the presence or absence of an operator.

FIG. 4 is a graph showing the time course of task and ambient illuminance when the light output control is performed by the dimming control means.
Energy saving can be expected as compared with the case of lighting 0 (%).

[0031]

According to the first to fifth aspects, since the light output control of the light source is performed by the dimming control means based on the signal of the optical sensor section of the task lighting device, energy saving can be expected. Further, it is possible to always provide the operator with an optimum TA ratio.

[Brief description of the drawings]

FIG. 1 is a schematic layout diagram of a task / ambient lighting device according to an embodiment of the present invention.

FIG. 2 is a graph showing the time course of tasks and ambient illuminance.

FIG. 3 is a graph showing task illuminance, total illuminance, and TA ratio.

FIG. 4 is a graph showing the time course of tasks and ambient illuminance when light output control is performed by the dimming control unit.

[Explanation of symbols]

 1: Task lighting device 2: Optical sensor unit 3: Ambient lighting

Claims (5)

[Claims] 1. A task lighting device having a fixture main body and a light source disposed on the fixture main body and illuminating a work area; and mainly detecting light other than light emitted from the task lighting fixture and outputting a signal. A task lighting device, comprising: a light sensor unit that performs light control; and a dimming control unit that controls a light output of a light source provided in the appliance body based on a signal from the light sensor unit. 2. The task lighting device according to claim 1, wherein the optical sensor unit is disposed upwardly above the task lighting device. 3. A task lighting fixture having a fixture main body and a light source disposed on the fixture main body and illuminating a work area; and mainly detecting light other than light emitted from the task lighting fixture and outputting a signal. A second light sensor unit for mainly sensing light emitted from the task lighting device; and a light sensor unit disposed on the device body based on signals from the light sensor unit and the second light sensor unit. And a dimming control unit for controlling the light output of the light source. 4. An ambient luminaire for providing ambient illuminance (A) by illumination other than from the task illuminator; and a task illuminance (T) by illuminating a work area.
4. The light control device according to claim 1, wherein the dimming control unit controls the light output of the light source provided in the apparatus main body so that the TA ratio becomes 1.0 to 2.0. A task lighting device, comprising: a task lighting device. 5. The task / ambient lighting device according to claim 4, further comprising a motion sensor for detecting the presence of a person.