JPS61271786A - Dimmer - 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 [Technical Field] The present invention relates to a light control device that controls the light of a lighting fixture near a window or the like according to the level of external light.

[Background Art] Conventionally, in this type of light control device that controls lighting equipment near a window or the like according to the level of outside light, the light control device shown in Fig. 4 (a)
), when the external light level changes as shown in (b),
), the dimming level was changed in approximately inverse proportion to the external light level. However, when the outside light level becomes 0, the lighting equipment is turned on at full power (100% lighting), and when the outside light level is equal to or higher than the reference value L0, the lighting equipment is turned off (0% lighting). However, in such a conventional example, at sunset 1
2 to sunrise the next morning 1. Until then, the lighting equipment would be turned on at full capacity regardless of the situation in the area where the lighting equipment was installed (for example, how crowded it was with customers, etc.), and unnecessary electricity would be wasted. there were.

[Objective of the Invention J The present invention has been made in view of the above points, and its purpose is to adjust lighting according to the external light level when a predetermined external light level is obtained. As well as producing light,
To provide a light control device that can perform light control according to the situation when a predetermined external light level is not obtained, and can reduce wasteful power consumption.

[Disclosure of the Invention] (Embodiment 1) Figures 1 and 2 show an embodiment of the present invention, in which external light detection means 1 comprising a photoelectric conversion element for detecting the level of external light, and A first dimming control means 4 that calculates and outputs a first dimming control signal 4 that controls the dimming circuit 3 of the lighting fixture 2 according to the light level, and @2 dimming control means 5 which calculates and outputs a second dimming control signal 5 which controls the dimming circuit 3 of the lighting fixture 2; The lighting fixture 2 is dimmed by the first dimming control signal v4, and when the external light level is less than or equal to a predetermined value, the lighting fixture 2 is dimmed by the second dimming control signal V. and a dimming mode switching means 6 for switching the dimming mode so that and a predetermined value, a switching control circuit CO that controls the relay contact R based on the result of comparing the values, and a backflow blocking diode D.
, ,D, are formed. The second dimming control means 5 also controls a preset time schedule (for example,
A dimming control signal for controlling the dimming of the lighting equipment 2 is calculated and output according to the time schedule of the crowded barracks.

The operation of the embodiment will be specifically explained below.

At present, the external light detection means 1 photoelectrically converts the incident external light and outputs an external light level detection signal v1 as shown in FIG. 2(a) in response to changes in the external light level. The first dimming control means 4 generates a dimming control signal V4 for the lighting fixture 2 based on the external light level detection signal ■1 as in the conventional example.
is performed, and a dimming control signal V for changing the dimming level in approximately inverse proportion to the external light level as shown in FIG. 2(b) is output as the output of the first dimming control means 4. has been done.

On the other hand, the second dimming control means 5 performs dimming control based on a dimming program preset according to the situation of the place where the lighting fixture 2 is installed (for example, whether the store is crowded with customers, etc.). The light control signal ■ is calculated, and the second light control means 5 outputs a light control signal V for changing the light control level according to a predetermined time schedule as shown in FIG. 2(e). has been done.

Next, in the dimming mode switching hand Pi6, the switching control circuit CO compares the external light level detection signal ``■'' with a predetermined value, and as shown in FIG. 2(d), the external light level detection signal v
While I is greater than or equal to the predetermined value L1 (t1°~t!゛)
The relay contact R of the switching relay is switched to normally open (IN (No)), and when the external light level detection signal is less than 3, the relay contact R is switched to normally closed 1 (NC). Therefore, the dimming control signal 6 inputted to the dimming circuit 3 via the dimming mode switch pIi6 is equal to the picture dimming control signal V, , V, as shown in FIG. 2(e). During the daytime (t+-h) when a predetermined external light level is obtained, the first dimming controller Pi
The dimming control signal (4) outputted from the second dimming control means 4 performs dimming control according to the external light level, and when a predetermined external light level cannot be obtained, the dimming control signal Dimming control is performed according to a preset dimming program using the dimming control signal VS in step 2, and the lighting near the window can be dimmed according to the external light level, and the external light level can be adjusted to a predetermined level. It is possible to perform dimming according to the situation when the value is less than the value, and wasteful power consumption can be reduced.

(Embodiment 2) FIG. 3 is an operational explanatory diagram of another embodiment in which the second dimming control means 5 is formed to control the dimming of the lighting equipment 2 depending on the number of customers in the store. The dimming control signal ■s output from the dimming control means 5 of the same figure (d) is such that the light is turned on when there are many customers in the store, and it is dimmed when there are few customers. This is for dimming the illuminator!4:2.

Here, the dimming circuit 3 is controlled by a dimming control signal V which is a combination of this dimming control signal V and the dimming control signal V output from the first dimming control means 4, illuminator l4c
2. When a predetermined level of external light is obtained, the dimming is controlled according to the level of external light, and when the predetermined external light level is not obtained, the dimming is controlled according to the number of customers in the store. This prevents unnecessary power consumption. The number of customers in the store is calculated by counting the number of customers entering the store using a counting means, counting the number of customers leaving the store using another counting means, and subtracting the number of customers leaving the store from the number of customers entering the store. .

[Effects of the Invention] As described above, the present invention includes an external light detection means for detecting an external light level, and a first dimming control signal that controls a dimming circuit of a lighting fixture according to the detected external light level. a first dimming control means that calculates and outputs a dimming control signal; and a second dimming control means that computes and outputs a second dimming control signal that controls a dimming circuit of the lighting equipment based on a preset dimming program. a dimming control means; when the detected external light level is above a predetermined value, the lighting equipment is dimmed by the first dimming control signal; when the external light level is less than the predetermined value, the prtJ2 is dimmed; It is composed of a dimming mode switching means that switches the dimming mode so that the lighting equipment is dimmed by the control signal, so during the daytime when a predetermined external light level is obtained, the external light level In addition to dimming the lighting according to the situation, when a predetermined level of external light is not obtained, the lighting can be dimmed according to the situation, and wasteful power consumption can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of one embodiment of the present invention, FIG. 2 is an explanatory diagram of the same operation as above, FIG. 3 is an explanatory diagram of another embodiment, and FIG. 4 is an explanatory diagram of the operation of a conventional example. 1 is an external light detection means, 2 is a lighting equipment, 3 is a dimming circuit, 4 is a first dimming control means, 5 is a second dimming control means, and 6 is a dimming mode switching means. Agent Patent Attorney Ishi 1) Nachiho 00 ρ>) )ZZ> Figure 3, Figure 4v4

Claims (1)

[Claims] (1) An external light detection means that detects the external light level, and a first dimming control signal that calculates and outputs a first dimming control signal that controls the dimming circuit of the lighting equipment according to the detected external light level. a second dimming control means that calculates and outputs a second dimming control signal for controlling the dimming circuit of the lighting equipment based on a preset dimming program; When the light level is above a predetermined value, the lighting equipment is dimmed by the first dimming control signal, and when the external light level is less than the predetermined value, the lighting equipment is dimmed by the second dimming control signal. A light control device comprising a light control mode switching means for switching light control modes in a controlled manner.