JPH01243396A - Dimmer and lighting system - Google Patents

Abstract

PURPOSE:To enable easy dimming by connecting the collector of a photo-coupler to one end of a light-flux adjusting resistor in a dimming circuit and the emitter to its other end so as to supply digital signals to the anode of the photo-coupler without using controls or the like. CONSTITUTION:When a switch 10 is pressed, an electric current flows through a light emitting diode of a photo-coupler 8 to turn ON between a collector and an emitter, which is followed by shortcircuiting of a light-flux adjusting variable resistor, so that the resistance value of the light-flux adjusting resistor is decreased almost zero equivalently. When the switch 10 is released on the other hand, no electric current flows through the light emitting diode of the photo-coupler 8 to turn OFF between the collector and the emitter, so that an original resistance value is recovered. With this, it is possible to dim by changing the continuity angle of a bilateral thyristor. Thus, dimming is possible only with digital signals without adjusting controls manually.

Description

Detailed Description of the Invention (Industrial Field of Application) Each invention of the present application (hereinafter referred to as the "present invention") provides a light control device for changing the brightness of a lighting device, and a lighting device using this light control device. It is related to.

[Conventional technology]

FIG. 5 is a circuit diagram showing an example of a conventional light control device, as disclosed in, for example, Japanese Utility Model Application Publication No. 60-42298. In the figure, 1 is a commercial power supply, 2 is an incandescent lamp, 3 is a bidirectional 3-terminal thyristor, 4 is a choke coil for noise prevention, 5 is a variable resistor for adjusting luminous flux, 6 is a capacitor, and 7 is a bidirectional 2-terminal thyristor for triggering. It is.

The conventional light control device is configured as shown in the figure, and changes the conduction angle (conduction phase) of the bidirectional three-terminal thyristor 3 by changing the value of the variable resistor 5 for adjusting the luminous flux, thereby controlling the current flowing through the incandescent lamp 2. The light is controlled by changing the

[Problem to be solved by the invention]

Conventional dimming devices perform dimming by changing the value of the variable resistor as described above, but in order to change the value of the variable resistor, it is necessary to manually move the knob. There was a problem.

The present invention has been made to solve these problems, and aims to provide a light control device that can digitally control the light without manually moving a knob, etc., and a lighting device using the same. This is the purpose.

[Means to solve the problem]

In order to achieve the above object, the present invention configures a light control device and a lighting device as shown in (1) to (4) below.

(1) In the dimmer, connect the collector and emitter of a photocoupler to both ends of the light flux adjustment resistor of the dimmer circuit,
A digital signal (No. 3) is supplied to the anode of the photocoupler.

(2) In a lighting device, a human body detection means detects the presence of a person in a predetermined area, and a plurality of human body detection means whose combinations change over time when the presence of one person is no longer detected based on the output of the human body detection means. a signal generating means for generating a digital signal;
and a light control device that receives the plurality of digital signals and performs dimming according to the combination of the digital signals.

(3) The lighting device should include the following means and devices a, b, and c.

a. Human body detection means for detecting the presence of a person in a predetermined area.

b. Upon receiving the output of the human body detection means and detecting the presence of a person, if the current output of the light control device is less than the preset output corresponding to the presence of the person, increase the output to the set output. If the presence of a person is no longer detected, and the current output of the dimmer is greater than or equal to the preset output corresponding to the absence of a person, the output will be adjusted to the set output. Signal generation means for generating a plurality of digital signals for gradual power reduction.

C9 The light control device receives the digital signal from the signal generating means.

(4) In the light control device, receiving multiple digital signals,
The apparatus includes a dimming circuit that performs dimming according to the combination of the digital signals, and a means for cutting off the power when the plurality of digital signals reach a predetermined combination.

[Effect]

With the above configuration, it is possible to perform dimming using a digital signal (No. 2) without manual intervention.

(Example) The present invention will be explained below with reference to Examples.

FIG. 1 is a circuit diagram of an embodiment of a light control device according to the first invention. In the figure, numerals 1 to 7 are similar to the conventional device shown in FIG. 8 is a photocoupler, 9 is a current adjustment resistor, 10 is a switch, and 11 is a DC power supply.

In the light control device configured as described above, when the switch 10 is pressed, current flows through the light emitting diode of the photocoupler, turning on the collector-emitter, short-circuiting the variable resistor 5 for adjusting the luminous flux, and changing the resistor for adjusting the luminous flux S. The value is equivalently almost zero. When the switch 10 is released, no current flows through the photocoupler's light emitting diode, and the collector-emitter circuit is turned off, returning to its original resistance value. Thereby, it is possible to perform light control by changing the conduction angle of the bidirectional thyristor.

In this way, only the digital signal can be dimmed without having to manually move a knob or the like.

Note that similar actions and effects can be obtained by using a relay instead of the photocoupler and short-circuiting the light flux adjustment resistor at the contact point of the relay.

FIG. 2 is a circuit diagram of a light control device that is another embodiment of the first invention. In the figure, 1 to 4 and 6 to 9 are the same as in the above embodiment. 11 is a microcomputer, 5
8 to 5d are resistors, and the resistance value is 5a or IKΩ, 5
b is 2Ω, 5C is 4Ω, and 5d is 8Ω. If the bit output of the microcomputer is programmed so that when a predetermined switch is pressed, a predetermined combination of resistors 5a to 5d corresponds, then by pressing the switch 12 appropriately, the light flux adjustment The resistance value of the resistor is
It becomes possible to change it in 16 steps, from OKΩ to 15Ω, and it also becomes possible to change the output of the light control device in 16 steps.

By the way, in the above explanation, we have discussed the case of a dimming method that controls the (17 phase angle) of a bidirectional thyristor, but it can also be applied to other dimming methods that utilize changes in resistance value.
Needless to say.

FIG. 3 is a configuration diagram of a lighting device that is an embodiment of the second invention. In the figure, numerals 1 to 9 are similar to the actual hh example in FIG. 11 is a microcomputer; 13 is a setting switch that sets the output of the sensor arrangement and operation switch; 14 is an operation switch; 15 is a human body detection sensor (pyroelectric type, etc.) that detects the presence of a person in a predetermined area (not shown);
6 is a NOR gate, and 17 is a relay.

Next, the operation of this actual h'fs example will be explained with reference to FIG. FIG. 4 is a flowchart showing operations based on the lighting control program stored in the memory of the microcomputer 11.

First, when the human body detection sensor 15 or 19 detects that a person has left the predetermined area, it reads the state of the output setting switch 13 and compares it with the current lighting output. To output data that is one rank darker than the output data, step 3.2) Perform predetermined dimming using a combination of resistors 5 to change the brightness of the illuminator 2. Repeat this until the brightness matches the setting data. Furthermore, if the human body detection sensor 15 detects that a person has entered the process, or if the operation switch 14 is operated, the process can be exited.

That is, when the human body detection sensor 15 detects that a person has left, unless the human body detecting sensor 15 detects that a person has entered halfway or the operation switch 14 is not operated, 3.1 of the flowchart.
In order to go through the loop of 3.2.3.3, the output setting of the dimmer is gradually dimmed by lowering the current output by 1 rank every 1 second until the output level is the same. I can do it.

When the human body detection sensor detects that a person has entered the predetermined area, if the current output is smaller than the set output or it is dark, it will output the setting data and immediately brighten it, and if you operate the operation switch, you can set the Output data.

In this way, the light of the illuminator 2 can be automatically controlled using digital signals depending on the presence or absence of a person, without using a knob or the like.

In this embodiment, when a person enters a predetermined area, the power is immediately increased to the set output to make it brighter, and when a person leaves the predetermined area, the power is gradually reduced to the set output and gradually darkened. Even if the person leaves the predetermined area and is still nearby, the light does not immediately turn off or dim, causing an unpleasant feeling.

In the embodiments described below, the brightness of a predetermined area is assumed to be based on the output of the dimmer (actually a combination of multiple digital signals to the photocoupler 8), but the actual brightness within the predetermined area is By providing a detection means and using its output as the output of the light control device, more accurate light control can be achieved.

In addition, if the human body detection sensor is a Dotsupura type, even if there is a person within the specified area, it will be falsely detected that the person has moved out of the area if there is no movement. I feel less pleasure.

Next, the third invention will be explained in detail using the same FIG. 3.

In the figure, all digital signals to photocoupler 8 are L.
When it becomes OW, the output of the NOR gate 16 becomes High, the relay 17 operates, and the power to the illuminator 2 is cut off.

With this configuration, the light control device can be provided with a function of interrupting the main circuit without using the output port of the microcomputer 11.

(Effects of the Invention) As explained above, according to the present invention, it is possible to adjust the light using a digital signal without manually moving a knob, etc., and furthermore, in the second invention, the light is gradually dimmed, causing discomfort. According to the third aspect of the present invention, the power cutoff function can be provided to the light control device without using the output port of the microcomputer.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the first invention, FIG. 2 is a circuit diagram of another embodiment of the first invention, and FIG. 3 is a configuration diagram of an embodiment of the second invention. FIG. 4 is a flowchart of the operation of the same embodiment, and FIG. 5 is a circuit diagram of the conventional example. In the figure, 5 is a resistor for adjusting the luminous flux, 8 is a photocoupler,
15 is a human body detection means, 16 is a NOR gate, and 17 is a relay. Note that the same reference numerals indicate the same or equivalent parts.

Claims (4)

[Claims] (1) A light control device characterized in that a collector and an emitter of a photocoupler are connected to both ends of a resistor for adjusting light flux of a light control circuit, and a digital signal is supplied to an anode of the photocoupler. (2) A human body detection means that detects the presence of a person in a predetermined area, and a signal that receives the output of the human body detection means and generates a plurality of digital signals whose combination changes over time when the presence of a person is no longer detected. A lighting device comprising: a generating means; and a light control device that receives the plurality of digital signals and performs dimming according to a combination of the digital signals. (3) A lighting device characterized by comprising the following means and devices a, b, and c. a. Human body detection means for detecting the presence of a person in a predetermined area. b. Upon receiving the output of the human body detection means and detecting the presence of a person, if the current output of the light control device is less than the preset output corresponding to the presence of the person, increase the output to the set output. If the presence of a person is no longer detected, and the current output of the dimmer is greater than or equal to the preset output corresponding to the absence of a person, the output will be adjusted to the set output. Signal generation means for generating a plurality of digital signals for gradual power reduction. c. A light control device that receives the digital signal from the signal generating means. (4) It is equipped with a dimming circuit that receives a plurality of digital signals and performs dimming according to the combination of the digital signals, and a means for cutting off the power when the plurality of digital signals reach a predetermined combination. A light control device characterized by: