JP6683942B2 - Lighting control device, illumination lamp, and illumination device - Google Patents

Description

  The present invention relates to a lighting control device, a lighting lamp, and a lighting device.

  BACKGROUND ART Conventionally, as an illuminating lamp, there is known an illuminating lamp that can be directly connected to an inverter ballast (also referred to as a lamp) for lighting a fluorescent lamp to perform a lighting operation.

In recent years, an illuminating lamp using a light emitting diode LED (Light Emitting Diode) as a light emitting element that consumes less power instead of a fluorescent lamp having a filament electrode has been proposed (for example, refer to Patent Document 1).
According to the technique disclosed in Patent Document 1, not only can a lighting fixture for a glow starter type fluorescent lamp and a lighting fixture for a rapid start type fluorescent lamp be equipped with a lighting device having a solid-state light emitting element, but also for a fluorescent lamp. An illuminating lamp having a solid-state light emitting element can be replaceably attached to a luminaire having an inverter type electronic ballast (hereinafter, also referred to as “fluorescent lamp ballast”).

  Since the output voltage of the fluorescent lamp ballast is an AC voltage, when connecting an LED lamp that lights up with a DC voltage, the AC signal of the ballast is full-wave rectified with a diode bridge and then a DC voltage is applied with a smoothing filter or smoothing capacitor. And the output is supplied to the LED element by the lighting circuit (see, for example, Patent Documents 2 and 3).

  However, since the smoothing capacitor lowers the impedance seen from the fluorescent ballast, depending on the type of fluorescent ballast, it was provided in the fluorescent ballast to detect deterioration of the fluorescent lamp and short circuit of the ballast output at startup. The protection circuit may detect an abnormality, and the output voltage may not be output, resulting in non-lighting.

  On the other hand, the method of obtaining the characteristics of the entire filter by reducing the capacitance value of the smoothing filter capacitor and increasing the characteristic values of the other filter components, and sacrificing the filter characteristics Although the method of downsizing has been dealt with, the former method causes an increase in the size and loss of other fair parts other than the smooth parts, and the latter method does not provide the desired smoothness and affects the stabilization of the circuit. There was a problem of exerting it.

FIG. 7 shows a lighting circuit disclosed in Patent Document 2.
In the conventional lighting circuit, a capacitor is connected to the filter unit in order to stabilize the output of the bridge diode. An LC filter is used in the circuit shown in FIG.

  In the conventional lighting circuit, if the capacitance value is set large and the inductor value is set small with respect to the cutoff frequency of the filter, the impedance will drop and the ballast will detect an abnormality and will not turn on without shifting to the preheating mode. Becomes On the other hand, when the capacitance value is set small and the inductor value is set large with respect to the cutoff frequency of the filter, it is possible to shift to the preheating mode and turn on the light. However, when the inductor value is increased, there are problems that the coil becomes large and loss increases due to an increase in internal resistance.

  Therefore, an object of the present invention is to provide a lighting control device capable of preventing non-lighting due to the capacity of a smoothing filter and realizing a stable lighting state even in an illuminating lamp using a solid-state light emitting element.

In order to achieve such an object, a lighting control device according to the present invention is a rectifier circuit connected to an inverter type electronic ballast to perform full-wave rectification of an alternating current, a light-emitting body including a plurality of solid-state light-emitting elements, and A smoothing capacitor that is connected to the output side of the rectifier circuit and removes an AC component included in the current output from the rectifier circuit; a switch element that is connected to the smoothing capacitor; a controller that controls the switch element; An internal power supply generating means for supplying a voltage to the controller, wherein the switch element is in a normally-off state before the voltage is supplied from the internal power supply generating means, and the controller is the internal power supply generating means. after a voltage is supplied from turning on state said switching element so that the smoothing capacitor is connected state after a predetermined time has elapsed A lighting control device according to claim.

  According to the present invention, it is possible to provide a lighting control device capable of preventing non-lighting due to the capacity of a smoothing filter and realizing a stable lighting state even in an illumination lamp using a solid-state light emitting element.

It is a circuit diagram of a lighting control device according to the first embodiment. It is a detailed circuit diagram of the lighting control device shown in FIG. 3 is a timing chart in the lighting control device according to the first embodiment. It is a circuit diagram of a lighting control device according to a second embodiment. FIG. 5 is a detailed circuit diagram of the lighting control device shown in FIG. 4. It is a circuit diagram of a lighting control device according to a third embodiment. It is a figure which shows an example of the conventional lighting circuit. It is sectional drawing which shows an example of the illuminating device to which an illuminating lamp can be attached. It is a front view which shows an example of the external appearance of an illuminating lamp.

  Hereinafter, a lighting control device, an illuminating lamp, and an illuminating device according to the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments described below, and other embodiments, additions, modifications, deletions and the like can be modified within the scope that those skilled in the art can contemplate, and any mode Also in the above, as long as the action and effect of the present invention are exhibited, it is included in the scope of the present invention.

[Lighting device, lighting]
FIG. 8 is an external view showing an outline of an illuminating device including a fluorescent lamp stabilizer to which the illuminating lamp according to the present invention can be attached.
In FIG. 8, reference numeral 1 is a reflecting umbrella to which a straight tube type illumination lamp described later is mounted. The reflector 1 is provided with a pair of sockets 2 at both ends in the extending direction thereof at intervals. The reflector 1 is provided with a fluorescent lamp ballast 3 to which electric power from the commercial AC power source E can be supplied.

The straight tube type illumination lamp 4 shown in FIG. 9 is attached to the illumination device of FIG.
The illuminating lamp according to the present embodiment includes a lighting control device, which will be described later, inside a straight pipe whose both ends are sealed by a base having a pair of electrode pins.

As shown in FIG. 9, in the illuminating lamp 4, both ends of the straight pipe 5 are sealed by a pair of bases 6. Each base 6 is provided with a pair of electrode pins 7a forming a part of the power supply system.
A commercial AC power source E is connected to the fluorescent lamp ballast 3. The frequency of the commercial AC power supply E is, for example, 50 Hz / 60 Hz. The output side of the fluorescent lamp ballast 3 is connected to the pair of sockets 2. Each of the pair of sockets 2 has a pair of electrode terminals 2a and 2b. A pair of electrode pins 7a is connected to the pair of electrode terminals 2a and 2b.
A lighting control device, which will be described later, is provided inside the straight pipe 5. The light-emitting body that constitutes the lighting control device includes a plurality of solid-state light-emitting elements.

[Lighting control device]
A lighting control device according to the present invention includes a rectifier circuit (bridge diode) connected to a fluorescent lamp ballast to perform full-wave rectification of an alternating current, a light emitter including a plurality of solid-state light emitting elements, and an output side of the rectifier circuit. And a switch element connected to the smoothing capacitor, a controller that controls the switch element, and an internal power supply generation unit that supplies a voltage to the controller.
The smoothing capacitor constitutes a smoothing filter.
The controller turns on the switch element after a lapse of a certain time after the voltage is supplied from the internal power supply generation means.

<First embodiment>
FIG. 1 shows a circuit diagram of the lighting control device according to the first embodiment.
The lighting control device of the present embodiment includes a lighting circuit L101 connected to a smoothing capacitor, and a light emitter is connected to the output of the lighting circuit L101.
The switch element SW101 is connected between the smoothing capacitor and the rectifier circuit.

  As shown in FIG. 1, the lighting control device of the present embodiment includes a rectifying circuit (bridge diode) BD101 and BD102, a lighting circuit L101, a smoothing filter F101, a smoothing capacitor C101 that forms a smoothing filter, and a smoothing filter F101. It is composed of a passive component X101, a switch element SW101, an LED load LED101, a controller CNT101, and an internal power supply generation means 101. The smoothing filter F101 may be composed of only the smoothing capacitor C101.

  If the switch element SW101 is not provided, the protection circuit inside the fluorescent lamp ballast detects the low impedance of the smoothing capacitor C101 even when the commercial power supply is turned on, and therefore the preheat mode is not entered.

The switch element SW101 is in a normally-off state and is electrically insulated. Therefore, the input impedance of this circuit, which is expected from the fluorescent lamp ballast (hereinafter, also simply referred to as “ballast”), is in a high impedance state.
This state is the same as when the original fluorescent lamp is connected to the ballast, the impedance of the fluorescent lamp is high when the commercial power is off, so the ballast protection circuit does not operate and the fluorescent lamp is turned on even when the commercial power is on. Transition to preheat mode as if connected.

  When the commercial power source is turned on and the ballast operates to enter the preheat mode, an AC signal having a frequency of 10 kHz or higher is output from the output terminal of the ballast in the preheat mode. The output voltage output in the preheating mode is full-wave rectified by the rectifier circuit, and the power supply voltage is supplied to the controller CNT101 through the internal power supply generation means P101.

When the power supply voltage is supplied to the controller CNT101, the controller CNT101 starts its operation, and the built-in internal timer starts counting.
Since the built-in timer is set to turn on the switch element SW101 connected in series to the smoothing capacitor C101 when the set time has elapsed, SW101 is turned on and the smoothing capacitor C101 is connected after the diode bridge. . After the transition to the preheating mode, the protection circuit does not work even in the state where the smoothing capacitor C101 is connected after the bridge diode, so that the LED element forming the light emitting body can safely maintain the lighting state.

  That is, in the lighting control device of the present embodiment, no voltage is supplied to the controller CNT101 during the preheat mode, and the switch element SW101 is turned on after a lapse of a certain time after transition to the normal mode. Also for the switch element SW101, the controller CNT101 needs to be turned on before the on / off control.

  The lighting circuit L101 has a Pch-type transistor element whose source terminal is connected to the rectifier circuit side and whose drain terminal is connected to the light-emitting body side, and a first resistance element which connects the source terminal and the gate terminal of the Pch-type transistor element. A second resistance element, one of which is connected to the gate terminal of the Pch-type transistor element, and an Nch-type transistor element in which one of the second resistance elements has a drain terminal connected to the output terminal of the controller. Composed of.

FIG. 2 is a detailed circuit diagram of the lighting control device according to the first embodiment shown in FIG.
As shown in FIG. 2, the lighting control device according to the present embodiment includes a bridge diode BD201, a bridge diode BD202, a controller CNT201, a capacitor C201, a switch element Q201 connected to the capacitor C201, and a light emitter (LED element) LED201. And a switch element Q202 that connects the LED element LED201 and the capacitor C201, and resistor elements R201 and R202 for generating a potential difference between the gate and source of the switch element Q202, and a switch element that controls the on / off state of the switch element Q202. It is provided with Q203 and an internal power supply generation means P201.

Before commercial power is supplied to the ballast, the switch elements Q201, Q202, Q203 are in the off state. When the commercial power supply is turned on, the ballast operates to enter the preheat mode state, the internal power supply generation means P201 operates, and the power supply voltage is supplied to the controller CNT201.
After the power supply voltage is supplied, the controller CNT201 operates, so that the gate signal of the switch element Q203 is turned on.
If the switch element Q203 is not turned on during the preheating mode and the switch element Q202 is not turned on, the switch element Q203 is not turned on and does not turn on. Therefore, the switch element Q203 is normally turned on within 1 second.
The switch element Q201 can be turned on at any timing as long as the output state of the ballast shifts to the preheat mode, and can be set arbitrarily by the user. It does not matter which of the switch elements Q201 and Q203 is turned on first.

FIG. 3 is a timing chart for explaining the timing of turning on the switch (switch element Q201 shown in FIG. 2) of the lighting control device of the present embodiment.
When the ballast shifts to the preheat mode, the internal power supply voltage rises by the internal power supply generation means, so that the gate signal of the switch element Q201 is turned on after the elapse of the set time. The timing of the switch element Q201 can be arbitrarily set by the user in the preheating mode or after the preheating mode.

<Second embodiment>
FIG. 4 shows a circuit diagram of the lighting control device according to the second embodiment.
The lighting control device of the present embodiment includes a lighting means L401 connected to a rectifier circuit, the light emitting body LED401 is connected to the output of the lighting means L401, and the switch element SW401 is connected between the smoothing capacitor C401 and the light emitting body LED401. Has been done.

  As shown in FIG. 4, the lighting control device of the present embodiment includes bridge diodes BD401, BD402, lighting means L401, capacitor C401, switch element SW401, LED load LED 401, controller CNT401, and internal power generation means 401.

  If there is no switch element SW401 and the input and output of the lighting means L401 are DC-connected, the protection circuit inside the ballast will detect the low impedance of the smoothing capacitor C401 even when the commercial power supply is turned on. Does not shift to preheat mode.

  The switch element SW401 is in a normally-off state and is electrically insulated. Therefore, the input impedance of this circuit seen from the ballast is in a high impedance state. This state is the same as when the original fluorescent lamp is connected to the ballast and the impedance of the fluorescent lamp is high when the commercial power is off, so the ballast protection circuit does not operate and the fluorescent lamp is connected even when the commercial power is on. Same as above, but shift to preheat mode.

  When the commercial power supply is turned on and the ballast operates to enter the preheat mode, an AC signal having a frequency of 10 kHz or higher is output from the output terminal of the ballast. The output voltage output in the preheating mode is full-wave rectified by the rectifier circuit (bridge diode), and the power supply voltage is supplied to the controller CNT401 through the internal power supply generation means P401.

When the power supply voltage is supplied to the controller CNT401, the controller CNT401 starts operating and the built-in internal timer starts counting.
Since the built-in timer is set to turn on the switch element SW401 connected in series to the smoothing capacitor C401 when the set time has elapsed, the switch element SW401 is turned on and the smoothing capacitor C401 is connected to the light emitting body LED401. The output voltage of the lighting means applied to both ends of the light emitting body LED 401 is smoothed by the smoothing capacitor C401.

  The lighting means L401 includes an inductance element L501 connected to the rectifier circuit, an Nch type transistor element connecting the inductance element and a reference point of the rectifier circuit, a controller for controlling on / off of the Nch type transistor element, and an Nch type transistor element. And a diode element that rectifies the signal switched by.

FIG. 5 is a detailed circuit diagram of the lighting control device according to the second embodiment shown in FIG.
As shown in FIG. 5, the lighting control device of the present embodiment is a switching device including bridge diodes BD501 and BD502, a controller CNT501, an active switch (an example of a switching element) Q502, an inductance element L501, and a diode element D501. A converter, a smoothing capacitor C501, a switch element Q501, a light emitting body LED501, and a current sense resistor R501 are provided.

The bridge diodes BD501 and 502 perform full-wave rectification on the AC signal supplied from the commercial power source E via the fluorescent lamp ballast.
The controller CNT501 controls the on / off timing of the active switch Q502. Specifically, the controller CNT501 generates a gate signal for the active switch Q502, outputs the generated gate signal to the active switch Q502, and drives the active switch Q502 to control the on / off timing of the active switch Q502. To do. Here, it is assumed that the controller CNT501 controls the active switch 330 to turn on at a timing different from the zero-cross timing of the AC signal that is full-wave rectified by the bridge diodes BD501 and 502.

The switching converter is a converter that converts an AC signal that is full-wave rectified by the BDs 501 and 502 into a DC signal, and is a so-called ACDC converter.
In the present embodiment, the switching converter is a boost converter, and the inductance element L501 and the diode element D501 are connected in series to the light emitting body LED501, and the active switch Q502 is connected in parallel.

The smoothing capacitor C501 is connected in parallel to the light emitting body LED501, and removes the AC component included in the DC current output from the switching converter.
The light emitting body LED 501 is connected to the switching converter and outputs the DC signal converted by the switching converter.
Specifically, the light emitter LED 501 emits light when a DC voltage is applied from the switching converter and a DC current flows.

The current sense resistor R501 is a resistor for detecting the current value of the current flowing in the LED 501, and outputs the current flowing in the light emitting body LED 501 and the voltage generated in the current sense resistor R501 to the controller CNT501.
The switch elements Q501 and Q502 are in a normally-off state and are electrically insulated. Therefore, the input impedance of this circuit seen from the ballast is in a high impedance state. In this state, the protection circuit of the ballast does not operate because the impedance of the fluorescent lamp is high when commercial power is off when the original fluorescent lamp is connected to the ballast.

  When the commercial power source is turned on while the switch elements Q501 and Q502 are in the off state, the ballast operates to enter the preheating mode state and the internal power source generating means P501 operates to supply the internal power source voltage to the controller CNT501. Since the controller CNT501 operates after the supply of the internal power supply voltage, the gate signal of the switch element Q501 is turned on after a lapse of a certain time. The switch element Q502 starts switching after starting the preheating mode. The user can arbitrarily set the ON timing of the switch element Q501 and the switching start timing of the switch element Q502.

<Third embodiment>
FIG. 6 shows a circuit diagram of the lighting control device according to the third embodiment.
In the lighting control device of the present embodiment, the light emitting body LED 601 is connected to the smoothing capacitor C601, and the switch element SW601 is connected between the smoothing capacitor C601 and the light emitting body LED 601.

As shown in FIG. 6, the lighting control device according to the present embodiment includes bridge diodes BD601 and BD602, an internal power supply generation unit P601, a controller CNT601, a smoothing filter F601, a smoothing capacitor C601 that configures the smoothing filter F601, and a smoothing capacitor C601. The filter includes a passive component X601 that constitutes the filter 601, a switch element SW601, and a light emitting element LED601.
The passive component X601 is a passive component that forms a filter with C601, but may be only C601.

  The SW 601 is in a normally-off state and is electrically insulated. Since the LED element is also in a high impedance state unless a voltage drop Vf or more is applied, the input impedance of this circuit seen from the ballast is in a high impedance state. This state is the same as when the original fluorescent lamp is connected to the ballast and the impedance of the fluorescent lamp is high when the commercial power is off, so the protection circuit of the ballast does not operate and when the fluorescent lamp is connected even when the commercial power is on. Similarly, the preheat mode is entered.

  When the commercial power source is turned on and the ballast operates to enter the preheat mode, an AC signal having a frequency of 10 kHz or higher is output from the output terminal of the ballast in the preheat mode. The output voltage output in the preheating mode is full-wave rectified by the bridge diode, and the power supply voltage is supplied to the controller CNT01 through the internal power supply generation means.

  When the power supply voltage is supplied to the controller CNT601, the controller CNT601 starts its operation and the built-in internal timer starts counting. Since the built-in timer is set to turn on the switch element SW601 connected in series to the capacitor C601 when the set time has elapsed, the switch element SW601 turns on and the state after the diode bridge connects C601.

  After shifting to the preheating mode, the protection circuit does not work even in the state where the capacitor is connected after the bridge diode, so that the LED element can safely maintain the lighting state.

  In the lighting control devices of the first and second embodiments described above, the internal power supply was generated after the diode bridge, but from the Vf voltage of the lighted LED as in the present embodiment shown in FIG. There is also a way to generate.

  Although the example of the smoothing capacitor has been described, the same effect can be obtained by inserting a switch in series with the capacitor using a smoothing filter using an LC filter.

  As described above, according to the lighting control device of the present embodiment, with respect to the output frequency of the fluorescent light ballast, as a result of the fluorescent light ballast erroneously detecting the low impedance of the capacity, the lighting lamp does not light up. Can be avoided.

BD bridge diode C smoothing capacitor CNT controller F smoothing filter SW switch element P internal power supply generation circuit R resistance element

JP 2008-277188 A JP, 2010-157480, A JP, 2014-49283, A

Claims (8)

A rectifier circuit that is connected to an inverter-type electronic ballast and full-wave rectifies the alternating current,
A light-emitting body composed of a plurality of solid-state light-emitting elements,
A smoothing capacitor that is connected to the output side of the rectifier circuit and removes an AC component included in the current output from the rectifier circuit ;
A switch element connected to the smoothing capacitor,
A controller for controlling the switch element,
An internal power supply generating means for supplying a voltage to the controller,
The switch element is in a normally-off state before a voltage is supplied from the internal power supply generation means,
The lighting controller is characterized in that the controller turns on the switch element so that the smoothing capacitor is brought into a connected state after a lapse of a predetermined time after the voltage is supplied from the internal power supply generation means. A lighting circuit connected to the smoothing capacitor,
The light emitter is connected to the output of the lighting circuit,
The lighting control device according to claim 1 , wherein the switch element and the smoothing capacitor are connected between the rectifier circuit and the lighting circuit. The lighting circuit has a source terminal connected to the rectifier circuit side,
A Pch-type transistor element having a drain terminal connected to the light emitter side;
A first resistance element connecting a source terminal and a gate terminal of the Pch-type transistor element;
A second resistance element, one of which is connected to the gate terminal of the Pch-type transistor element,
The lighting control device according to claim 2 , comprising a Nch type transistor element in which a drain terminal is connected to one of the second resistance elements and a gate terminal is connected to an output terminal of the controller. A lighting means connected to the rectifying circuit,
The light emitter is connected to the output of the lighting means,
The lighting control device according to claim 1 , wherein the switch element and the smoothing capacitor are connected between the light emitter and the lighting means. The lighting means, an inductance element connected to the rectifier circuit,
An Nch type transistor element in which the inductance element and the reference point of the rectifier circuit are connected,
A controller for controlling on / off of the Nch type transistor element;
The lighting control device according to claim 4 , comprising a diode element that rectifies a signal switched by the Nch-type transistor element. The light emitter is connected to the smoothing capacitor,
Lighting control device according to claim 1, wherein said switch element and said smoothing capacitor is connected between the emitters and the rectifier circuit. Inside a straight pipe having both ends sealed by cap each having a pair of electrode pins, the illumination lamp, characterized in that it comprises a lighting control device according to any one of claims 1 to 6. An illumination device comprising a fluorescent light ballast, to which the illumination light according to claim 7 is attached.