JP2507095B2 - Lighting control device - Google Patents

Description

The present invention relates to a dimming device for an illumination lamp.

[Conventional technology]

A conventional dimming device of this type includes, for example, a power control unit using a triac, and the ignition phase of the triac is controlled by a switch operation to adjust the power supplied to the illumination lamp. .

[Problems to be Solved by the Invention]

The switch is, for example, an ON / OFF switch, a first and a second dimming switch, and is turned ON / OFF in the off state.
When you press the switch, the triac will have a phase α = 30 °.
When the illumination lamp is lit at a high brightness (highest illuminance) and the first dimming switch is pressed in this high brightness lighting state, the triac fires at a phase α = 120 ° When the mode shifts to medium-brightness lighting (medium illuminance) and the second dimming switch is pressed, the triac fires at, for example, phase α = 150 °, and the illumination lamp shifts to low-brightness lighting (low illuminance). It also has one ON / OFF switch and one dimmer switch. When you press the dimmer switch, the triac will always conduct at a constant firing phase, and if you continue to hold the dimmer switch, the triac will fire. There is a system in which the phase changes continuously and the brightness of the lighting changes continuously, but in either case, the illuminance (dimming) level is not maintained, so it is turned on.
When the / OFF switch is pressed to turn on the illumination lamp at high brightness, in order to obtain the dimming level before turning off, there is the inconvenience that the dimming operation must be performed each time.

The present invention has been made to solve the above-mentioned conventional problems, and provides a light control device for an illumination lamp capable of automatically adjusting the dimming level obtained before the light is turned off when the illumination lamp is turned on. The purpose is to do.

[Means for solving the problem]

In order to achieve the above object, the present invention turns the command signal ON / OFF.
It consists of a command signal, an illuminance increase command signal, and an illuminance decrease command signal.The control unit sends an upper limit control signal when it receives an ON command signal, and it erases the control signal that is being sent when it receives an OFF command signal. When receiving the illuminance increase command signal or the illuminance decrease command signal, the control signal is continuously changed to increase or decrease the current illuminance of the illumination lamp during the input of the signal, and the illumination lamp is input when the signal is input. If the current illuminance is 0, the illuminance value stored in the memory unit is read out and a control signal corresponding to the illuminance value is sent out. The control signal level is the level of the control signal.

[Action]

In the present invention, when the illuminance increasing command signal or the illuminance decreasing command signal is generated by the switch operation while the illumination lamp is in the off state, the value of the control signal sent by the control section immediately before the extinction is read out from the memory section. Since the control signal is given to the drive unit, the illumination lamp is lit at the illuminance that was lit immediately before it was turned off, and it is necessary to adjust the illuminance after the illumination lamp is lit as in the conventional case. It can be omitted.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a key switch, ON / OFF
It consists of switch 1A, illuminance increase switch (UP switch) 1B and illuminance decrease switch (DOWN switch) 1C. Reference numeral 2 denotes a control unit composed of a microcomputer, which receives the switch output of the key switch 1, decodes it, and sends a control signal to the trigger circuit 4 of the drive unit 3. The trigger circuit 4 sends a trigger pulse to the triac of the power control unit 5. The output of the power control unit 5 is supplied to the illumination lamp 7 through the noise filter 6. A commercial power source 8 is a power source of the power control unit 5. 9 is a zero cross detector,
The zero point passage timing of the voltage of the commercial power source 8 is detected and supplied to the control unit 2. Reference numeral 10 is a power supply circuit that supplies operating power to each unit of the dimmer, and receives power from the commercial power supply 8.

Next, the operation of this embodiment will be described with reference to FIG. FIG. 2 shows the relationship between the illuminance of the illumination lamp and the key switch described later.

 Now, it is assumed that the illumination lamp 7 is off.

When the ON / OFF switch 1A is pressed in this state, the control unit 2 decodes the ON / OFF command signal S1 which is the switch output,
Phase α = from the timing when the voltage AC of the commercial power source 7 passes through the zero point
The control signal C rising at a delay of 30 ° is sent to the trigger pulse generation circuit 4, and the trigger pulse generation circuit 4 controls the control signal C.
The trigger pulse P synchronized with the rising edge of is sent to the triac 5. As a result, the triac 5 conducts at the phases α = 30 ° and 150 ° of the voltage AC, the phase-controlled alternating current is supplied to the illuminating lamp 7, and the illuminating lamp 7 is turned on with high brightness (upper limit illuminance).

When the ON / OFF switch 1A is pressed in this state, the control signal C disappears, the power supply to the lamp 7 is cut off, and the lamp 7 is turned off.

When the illuminating lamp 7 has a certain illuminance, for example, when the upper limit illuminance is in the lighting state, when the DOWN switch 1C is pressed, the control unit 2 decodes the illuminance lowering command signal S3 which is the switch output, and sends it now. The generation timing (phase) of the control signal C that is present is continuously delayed as long as there is an input. As a result, the ignition phase α of the triac 5 continuously increases, the power supplied to the lighting 7 decreases, and the illuminance of the lighting 7 continuously changes to the low illuminance side, and when there is no input, this The continuous change is stopped, and thereafter, the lighting is continued at the illuminance of the dimming level at the time of the stop.

When the illuminating lamp 7 is in a lighting state of a certain illuminance, for example, the lower limit illuminance, when the UP switch 1C is pressed, the control unit 2 decodes the illuminance raising command signal S2 which is the switch output and sends it now. The generation timing (phase) of the control signal C is continuously advanced while the input is made. As a result, the firing phase α of the triac 5 continuously decreases, the power supplied to the lighting 7 increases, and the illuminance of the lighting 7 continuously changes to the high illuminance side. The change stops, and thereafter, the light continues to be illuminated with the illuminance of the dimming level at the time of the stop.

The controller 2 has a value corresponding to the current illuminance of the illuminating lamp 7, that is, a generation phase of the control signal C (hereinafter, this is referred to as an illuminance value).
Is updated and written in a memory unit (not shown), and when the light is turned off, the dimming level before the light is turned off is stored in the memory unit.

Therefore, when the control unit 2 receives the illuminance increase command signal S2 or the illuminance decrease command signal S3 while the illumination lamp 7 that does not send the control signal C is in the off state, the control unit 2 changes the illuminance value written in this memory unit. It is read and the control signal C having a phase corresponding to this illuminance value is sent to the trigger circuit 4. As a result,
The illumination lamp 7 is turned on with the illuminance of the previous dimming level.

In this case, if the illuminance increase command signal S2 or the illuminance decrease command signal S3 continues for more than 0.5 seconds, for example, the control unit 2
Shifts to the above or the above operation.

Thus, in this embodiment, the UP switch 1B or DO
By pressing the WN switch 1C, the illuminance of the lamp 7 can be continuously raised and lowered.

Also, with the illumination lamp 7 off, the UP switch 1B
Alternatively, when the DOWN switch 1C is pressed, the illuminating lamp 7 is lit with a certain illuminance, and this "certain illuminance" is the illuminance of the illuminating lamp 7 immediately before turning off, so the illuminance at the time of lighting is always fixed. As in the conventional case, the number of cases requiring the adjustment of the illuminance after lighting is reduced, and the labor for adjusting the illuminance can be reduced as compared with the conventional case.

〔The invention's effect〕

As described above, according to the present invention, the value of the control signal at the time of lighting is stored in the memory even after the light is turned off, and the illuminance increase command signal or the illuminance decrease command signal for raising or lowering the illuminance is not during the lighting of the illumination lamp. When the illumination lamp is turned off, the value of the control signal is read from the memory section and the control signal having the value is applied to the drive section.
Since the illuminating lamp is lit with the illuminance that was lit immediately before it was turned off, it is possible to save the trouble of adjusting the illuminance after turning on the illuminating lamp as in the conventional case.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 shows the relationship between the illuminance of the illumination lamp and the command signal from the key switch in the above embodiment. 1A …… ON / OFF switch, 1B …… UP switch, 1C …… DOWN
Switch, S1 ... ON / OFF command signal, S2 ... Illuminance up command signal, S3 ... Illuminance down command signal, 2 ... Control section, 4 ...
Trigger circuit, 5 ... Power control unit, 7 ... Lighting.

Claims (1)

(57) [Claims] 1. A light control device comprising: a control section for sending a control signal based on a command signal; and a drive section for receiving the control signal and supplying electric power of a magnitude corresponding to the control signal to an illuminating lamp. , The command signal consists of an ON / OFF command signal, an illuminance increase command signal, and an illuminance decrease command signal.The above control unit sends the upper limit control signal when it receives the ON command signal, and sends it when it receives the OFF command signal. The control signal is extinguished, and when the illuminance increase command signal or the illuminance decrease command signal is received, the control signal is continuously changed in the direction of increasing or decreasing the current illuminance of the illumination lamp during the input of the signal, When the signal is input, if the current illuminance of the illuminating lamp is zero, the illuminance value stored in the memory unit is read out and the control signal corresponding to the illuminance value is sent out. The control unit sends the message immediately before turning off. Dimmer lighting lamp, which is a level of to have the above control signal.