JPH02288191A - Illumination device - 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] [Industrial Application Field] The present invention relates to a lighting device equipped with a switch circuit that switches between a full-light state and a dimming state of a lamp, and in particular, the present invention relates to a lighting device that is equipped with a switch circuit that switches between a full-light state and a dimming state of a lamp, and in particular, the circuit switches between an OFF state and a dimming state. This invention relates to an inverter device with a switch circuit.

[Prior art] A method for changing the illuminance of indoor lighting equipment is to change the brightness by changing the number of lamps lit and switching between a full-light state in which all lamps are energized and a dimming state in which some lamps are energized. is conventionally used.

Another illuminance switching method is to use an inverter circuit to change the amount of electricity while all the lamps 1 are lit to switch between a full light state where they are lit at 100% illuminance and a dimming state where they are lit at 60% illuminance, for example. methods are conventionally used.

A pull switch that is connected to multiple contacts in sequence has traditionally been used as a switching means for switching between the full-light state and the dimming state, but in recent years, in place of such a pull switch, on-off switches built into the wall have been used. A pull-less changeover switch (for example, trade name SS Switch, manufactured by Chuso) has been developed that allows switching to a plurality of circuits in sequence by repeatedly turning on and off the switch. An example of a circuit configuration using such a pullless type changeover switch is shown in FIG.

The changeover switch 3 has five terminals L1 to L5. Terminals L3 to L5 are connected to circuits A, C, and C to be switched, respectively. 4 is a power supply, and 5 is a wall switch. Circuit A
And circuit B is connected to each two lamps of a four-lamp type lamp, for example, and circuit C is connected to a miniature light bulb.

When the wall switch 5 is first turned on, the action of the changeover switch 3 causes the terminals L2, Ll, L3 . L4 is connected, circuits A and B are energized, and the four lamps are turned on, creating a full-light state. Next, when the wall switch 5 is once turned off and then turned on again within a predetermined short time, only the terminals L2, L1, and L3 are connected, and only the two lamps are lit by the circuit A, resulting in a dimming state. Next, when the wall switch 5 is turned off again and turned on again within a predetermined short time, terminals L2 and L5 are connected and the circuit C
is energized and the miniature light bulb lights up. In this way, by repeatedly turning on and off the wall switch, you can change the light state to full light state, dimming state, etc.
The miniature light bulb lighting state is sequentially switched through an off state (extinguished state).

[Problems to be Solved by the Invention] When the above-mentioned pull-less changeover switch and inverter circuit are combined to change the illuminance by changing the amount of energization while the lamp is fully lit, when switching from a full-light state to a dimming state, or when switching from a full-light state to a dimming state, or On the other hand, when switching in the opposite direction, the light is turned off once, so the change in brightness cannot be seen, and it is difficult to determine whether the light is in the dimmed state or the full light state, and the switching operation may be repeated unnecessarily. Further, since the current used in the dimming state is a very small current, it is not possible to obtain a current to maintain the ON state of the changeover switch (SS switch triac), and it is necessary to separately prepare a holding current compensation circuit.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and aims to provide a lighting device that can easily distinguish between a full-light state and a dimming state, and can ensure a current to maintain the on-state of a changeover switch. .

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a lighting device including a switch circuit that switches between a full light state and a dimming state of a lamp with an OFF state in between. An indicator light that lights up in the dimming state is connected in parallel to the switch circuit.

[Function] When the light is connected to the dimming circuit by switching the switch, the indicator light connected in parallel with this is also energized, and the indicator light lights up, confirming that the light is in the dimming state.

A current greater than the on-state holding current of the pull-less type changeover switch flows through the switch through this indicator light.

[Example] FIG. 1 is a circuit configuration diagram of a lighting device with a changeover switch (inverter appliance) according to the present invention. The changeover switch 3 has terminals 31 to S5, and the switch itself is well known and has the same configuration and function as the switch shown in FIG. Each terminal S1
~S5 is the inverter 2. Power supply 4. Wall switch5. It is connected to the miniature light bulb 6. The inverter 2 is connected to the lamp 1 to be dimmed. Inverter 2 has two AC terminals At, A3 and one dimming terminal A2. Terminals AI and A2 of inverter 2 constituting the dimming circuit
are connected to terminals St and S2 of the changeover switch 3. A dimming indicator lamp 7 is connected in parallel to this dimming circuit.

A circuit with such a configuration operates as follows. First, when the wall switch 5 is turned on, the action of the switch 3 causes
Terminals Sl, S2. S3 becomes energized and the lamp 1 lights up in a dimmed state. At this time, power is supplied to the indicator lamp 7 at the same time, and the indicator lamp 7 lights up. Subsequently, when the wall switch 5 is turned off and then turned on again within a predetermined short time, the terminals Sl and S3 are energized and the dimming terminal S2 is cut off. Therefore, the lamp 1 is lit in full light. At this time, the power supply to the indicator light 7 is cut off, so the indicator light 7 is turned off. Next, when the wall switch 5 is turned off again and turned back on within a predetermined short time, the terminal S4 is energized and the miniature light bulb 6 lights up. At this time, terminals St, S2. S
3 is cut off, and the lamp 1 and the indicator lamp 7 are kept in the off state. If the wall switch 5 is further turned off and on, the above operation is repeated again.

As described above, the dimming state is switched to the full-light state, and from the full-light state to the small light bulb lighting state, respectively, with the light-off state in between. Note that if the off time of the wall switch 5 is long, the switching action is performed from the initial dimming state.

[Effects of the Invention] As described above, in the lighting device according to the present invention, since the indicator light is connected in parallel to the dimming circuit, the dimming state can be reliably identified by lighting the indicator light. Since the indicator light is connected in parallel to the circuit, even if the indicator light goes out, the switching operation from dimming to full light can be performed without any problem. Further, since a current greater than the dimming holding current of the changeover switch can be passed through the indicator light, the holding current can be secured without using any other holding current supply means. Further, if the inverter is configured to change the switching order from dimming to full light, the above-mentioned switching action can be achieved by directly combining the inverter with the inverter without changing the switching order of the changeover switch.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a lighting device according to the present invention, and FIG. 2 is an explanatory diagram of a known pull-less changeover switch. Lamp, 2: Inverter, 3: Changeover switch, 5: Wall switch, 6: Small light bulb, 7
;Indicator light.

Claims (1)

[Claims] In a lighting device equipped with a switch circuit that switches between a full-light state and a dimming state of a lamp with an OFF state in between, an indicator lamp that lights up in the dimming state is connected in parallel to the switch circuit. Characteristic lighting equipment.