JPH0458493A - Lighting device - Google Patents

Abstract

PURPOSE:To stop charging a secondary battery while a lamp is lit, prevent a rise in temperature inside a lighting fixture and improve reliability of respective parts by providing a control circuit which outputs a signal for inhibiting charge to a charging controller while a signal for lighting the lamp is being output. CONSTITUTION:When a lamp La is in a state of light adjustment or lighting by a control signal from a control circuit 5, the control circuit 5 outputs a signal for stopping charging to a charging control unit 8 of a charging circuit 7, and the charging circuit 7 is cut so that charging current does not flow to a secondary battery B2. Accordingly the charging circuit 7 is not heated, resulting in no rise in temperature inside a lighting fixture due to the heating of the charging circuit 7 so as to improve reliability of respective parts in the lighting fixture. The secondary battery B2 is charged only when the lamp La is unlit, so that it is not charged at a high temperature due to heat of a lighting circuit, etc., preventing a drop in a service life of the secondary battery 2B due to charging at a high temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lighting device for a lighting fixture, and particularly to a lighting device having a secondary battery as a power source that is not used for lighting a lamp.

[Conventional technology]

FIG. 4 shows an example of a circuit diagram of a conventional lighting device for lighting equipment, and the circuit system is a so-called half-bridge inverter, to which a remote control function is added. This lighting device ffl includes, in addition to a commercial type BAC that provides a power source for lighting the lamp La, a primary battery B1 as a power source that is not used for lighting the lamp La.

The lighting device l in the figure mainly includes a power supply circuit section 2, an inverter circuit section 3 which is a lighting circuit, a drive circuit 4, a control circuit 5 including a signal processing circuit for remote control signals, and a reception circuit for remote control signals. 6 and a secondary battery B1.

The power supply circuit section 2 connects the commercial type #AC with a diode bridge D.
B rectifies the output, and smoothes the output with a capacitor C1 to obtain a DC power source. Switching elements Q1 and Q2 of the inverter circuit section 3 are connected to the DC power source, and a drive circuit receives a signal from the control circuit 5. 4, the switching elements Ql and Q2 are alternately turned on,
OFF, inductance and capacitor C2, C
3, a resonance current is caused to flow, and the discharge lamp La is started and lit. Further, the control circuit 5 is connected to a remote control signal receiving section 6 to which a secondary battery Bl is connected.

In the lighting device i having such a configuration, the control circuit 5 controls the drive signal of the drive circuit 4 in response to the signal received by the remote control signal receiving section 6, and the control circuit 5 controls the drive signal of the drive circuit 4 to switch between "full lighting", "lights out", and "lights out".
It performs lighting control with a mode of "dimming". In other words, if the drive signal repeats ``H''° 'L' at a constant frequency, it will be ``full lighting J'', if it is only ``L'', it will be ``off'',
If the frequency is higher than when the light is turned on, it becomes U dimming J. Therefore, in this lighting device 1, it is possible to control the lamp La to be turned off even when the commercial power supply AC is in the energized state.

Note that here, the negative battery B1 is connected to the remote control signal receiving unit 6.
The power supply and the lighting mode (full lighting, dimming, etc.) of lamp La immediately after lamp La is turned off when the commercial power supply AC is turned off are used as a bank-up power source that is stored in the RAM inside the receiver 6. It will be done.

By the way, in the lighting device 1 configured in this way, the power source for the remote control signal receiving section 6 and the power source for the RAM that stores the lighting mode (lighting, dimming, etc.) immediately before the lamp La is turned off is the primary battery B1. Therefore, there was a problem in that maintenance was always required to prevent the battery from running out.

FIG. 5 shows another conventional example, which was invented in order to solve the problems of the conventional example, in which the secondary battery B1 is replaced with a secondary battery B2 and the charging port 117 is limited. The diversion resistor R and the reverse current prevention diode D are connected to charge the secondary battery B2. Here, the current-limiting resistor R is provided to prevent overcharging current and overvoltage because it is normally impossible to directly supply a commercial type ifgAc or a DC power source obtained by rectifying and smoothing it to the secondary battery B2. Some use a step-down transformer, DC-DC converter, etc.

[Problem to be solved by the invention]

However, in a lighting fixture with a built-in conventional lighting device 1 having a secondary battery B2 configured in this way, when the lamp La is lit (full lighting and dimming), heat from the lamp La and the lighting circuit, etc. The inside of the lighting equipment becomes hot due to the heat generated from the lighting equipment. Furthermore, since the secondary battery B2 is always being charged while the commercial iAc is energized, heat generation from the charging circuit 7 is also added, and the inside of the lighting equipment becomes even hotter. Therefore, charging the secondary battery B2 in this high-temperature state will shorten the life of the secondary battery B2, and will also cause the temperature of other parts to rise, and if the temperature of those parts exceeds the allowable operating temperature range. There were disadvantages in that the reliability of each component deteriorated due to the high temperature.

The present invention has been made in view of the above background, and its purpose is to stop charging the secondary battery while the lamp is lit, prevent the temperature rise inside the lighting equipment, and improve the reliability of each component. It is an object of the present invention to provide a lighting device for a lighting device, which improves the performance of the lighting device and reduces the decrease in the life of a secondary battery due to temperature.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides that when a commercial power supply AC is supplied and a power source for lighting the lamp La is obtained from the commercial type tXAC, a charging circuit is provided from the commercial power supply AC. It has a secondary battery B2 as a power source that is charged via the power source 7 and used for purposes other than lighting the lamp La, and has a control circuit 5 that controls the lighting of the lamp La, and is connected to the commercial power source AC. In the lighting device 1, which has a function of controlling the lamp La to be turned off even in the dimming state, the charging circuit 7 is provided with a charging control section 8, and the control circuit 5 lights the lamp La including the dimming state. While the signal is being output, the control circuit 5 outputs a signal prohibiting charging to the charging control unit 8 to stop charging, and only when the control circuit 5 is outputting the light-off signal, the control circuit 5 stops the charging. The present invention is characterized in that it is configured to be able to charge the secondary battery B2 by outputting a signal to the control unit 8 to start charging.

[Effect]

With the above configuration, when the lamp La is in a dimming or lighting state due to a control signal from the control circuit 5, a signal is sent from the control circuit 5 to the charging control section 8 of the charging circuit 7 to stop charging. is output, the charging circuit 7 is cut off, no charging current flows to the secondary battery B2, and the charging circuit 7 does not generate heat, so that the temperature inside the lighting fixture 1 does not increase due to the heat generated by the charging circuit 7. Further, the secondary battery B2 is charged only when the lamp La is off and the temperature inside the lighting fixture is low, and is not charged under high temperature conditions due to heat from the lighting circuit or the like.

〔Example〕

FIG. 1 shows a first embodiment of the present invention, and FIG. 2 shows its basic configuration. Except for the connection between the circuit 5 and the secondary battery B2, the other configuration is the same as that of the conventional example having the secondary battery.

First, the basic operation will be explained based on FIG. 2. This lighting device 1 turns on the switch SWl by the lighting control section 9 including a drive circuit etc. even when the commercial power supply AC is energized.
By turning it off, the lamp La can be turned on and off. Similarly, the lighting control unit 9 turns the switch SW2 to O.
If it is set to N or OFF, charging of the secondary battery B2 can be started or stopped. Here, the resistor R is a source resistance for the charging circuit 7, and the diode D is an element for preventing backflow when the commercial HAc is stopped.

Figure 1 shows a specific circuit diagram of the charging circuit 7.
In addition to the current limiting resistor R and the backflow prevention diode D,
It has a charge control section 8 composed of transistors Tri and Tr2 and resistors R2 and R3.
and a secondary battery B2 are connected to the control circuit 5.

In the lighting device 1 configured in this way, the signal output from the drive circuit 4 to the switching elements Ql and Q2 is controlled by the control circuit 5 to control dimming or full lighting (repetition of °゛H゛° and °′L°°). In this case, a signal from the control circuit 5 is applied to the transistor Tr2 constituting the charging control section 8.
"L" is output, transistor Tr2 is turned off,
As a result, the transistor Tri is turned off, the charging circuit is cut off, and the secondary battery B2 is not charged. Further, when the signals output to the switching elements Q1 and Q2 are off (only "L"), a signal "H" is sent from the control circuit 5 to the transistor Tr2 constituting the charging control section 8.
” is output, the transistor Tr2 turns on, and as a result, the transistor Trl turns on, and the secondary battery B
2 is charged. In other words, the secondary battery B2 is not charged when the lamp La is dimmed or fully lit, and the secondary battery B2 can be charged only when the commercial power supply AC is turned on and the lamp La is turned off. be.

With this configuration, when the lamp La is dimmed or lit by the control signal from the control circuit 5,
The control circuit 5 outputs a signal to stop charging to the charging control section 8 of the charging circuit 7, and the charging circuit 7 is cut off, so that no charging current flows to the secondary battery B2, and the charging circuit 7 does not generate heat. Therefore, the temperature inside the lighting device does not increase due to heat generation from the charging circuit 7, and the reliability of each component within the lighting device can be improved. Also, the next battery B
2 is charged only when the lamp La is off,
This prevents charging under high temperature conditions due to heat from the lighting circuit, etc., and reduces the lifespan of the secondary battery B2 due to charging under high temperature conditions. Furthermore, while the lamp L a is on, the secondary battery B
2 is stopped, the power consumption of the lighting device 1 can be reduced.

FIG. 3 shows a second embodiment of the present invention, and shows a basic configuration diagram of an incandescent lamp lighting device having a dimming function.

The lighting device 1 in this embodiment mainly includes a power supply circuit section 2, a lighting circuit 3, a control circuit 5, a charging circuit 7, and a charging control section 8, as well as a level detection circuit 1o, a power failure detection circuit 11, and a lighting mode storage circuit. 12.

The power supply circuit section 2 is configured to rectify commercial @AC through a step-down transformer T with a diode bridge DB, smooth it with a capacitor C, and obtain a DC power source.

The lighting circuit section 3 uses its DC power source as an incandescent lamp L.
A switching element Q3 is interposed in the circuit 3, and this switching element Q3 is controlled (ON, OFF) by a control circuit 5 to be described later to light up,
It is configured to dim and turn off the light.

The control circuit 5 controls the switching element Q3 of the lighting circuit section 3 described above, outputs a signal for starting or stopping charging to the charging circuit 7, and also controls charging of the secondary battery B2. For this reason, one of the control lines is connected to an AND circuit 8 which is a charging control section to be described later. In other words, if the drive signal from the control circuit 5 is "L", the lamp La is turned off, and the charge control section AN of the charge circuit 7 is sent from the control circuit 5 to the AN
A signal "Hoo" that enables charging is outputted to the D circuit 8, and when the drive signal is "H" or a repetition of "H" and "L", the lamp La lights up and the control circuit 5 Signal “L” to stop charging to AND circuit 8
” is output. Note that the lamp La is dimmed by controlling the ON duty of a pulse signal that is a drive signal.

Further, a constant current charging circuit 7, which is a charging circuit, is connected to one end of the output side of the diode bridge DB via a backflow prevention diode D, and a secondary battery B2 is connected to it, and is a charging control circuit. In response to a signal from the AND circuit 8, charging of the secondary battery B2 is started or stopped.

The level detection circuit IO detects the voltage of the secondary battery B2, and is connected to the charging circuit 7 side of the secondary battery B2, and its output is sent to one of its inputs to an AND circuit 8, which is a charging control section described later. Connected as .

This level detection circuit IO is configured to output "H" as an output if the voltage level of the secondary battery B2 is below a certain level, and to output "L" if it is above a certain level.

The power outage detection circuit 11 is a commercial type [one that detects the presence or absence of energization of AC], and is connected to a diode bridge DB, and its output is connected to an AND circuit 8 as one of its power sources. This power failure detection circuit 11 is configured to output "H" as an output only when the power supply AC is in a energized state, and output "L" in other states.

The lighting mode storage circuit 12 is a charging circuit 8 for the secondary battery B2.
2 side via the diode D2, and the control circuit 5
is also connected.

The AND circuit 8 which is a charging control section inputs the outputs from the control circuit 5, the level detection circuit 10, and the power failure detection circuit 11 described above to the AND circuit 8, and outputs the output from the constant current charging circuit 7.
is connected to the constant current charging circuit 7 to control the constant current charging circuit 7. Therefore, in this lighting device 1, only when all the signals of the control circuit 5, level detection circuit 10, and power failure detection circuit 11 input to the AND circuit 8 are "H", a signal is sent to the constant current charging circuit 7. Charging is performed when "H" is output, and charging is stopped in other states. In other words, the control circuit 5
A signal to turn off the lamp La is output from the battery B, the commercial type aAC is in a energized state, and charging is performed only when the voltage of the secondary battery B2 is below a certain level. In addition,
Here, the constant current charging circuit 7, which is a charging circuit, is a secondary battery B2.
In order to improve the reliability of the battery, this circuit is always controlled to maintain a constant charging current regardless of the power supply voltage or battery voltage.

Because of this configuration, in this embodiment as well, the first
The same effect as in the embodiment is achieved.

(Effects of the Invention) With this configuration, when the lamp is in a dimming or lighting state, a signal is sent from the control circuit to the charging control section 21 of the charging circuit to stop charging. is output, the charging circuit is cut off, and no charging current flows to the secondary battery, which prevents the temperature inside the lighting equipment from increasing due to heat generation in the charging circuit, improving the reliability of each component within the lighting equipment. I can do it. In addition, the secondary battery is charged only when the lamp is off and the temperature inside the lighting equipment is low, and it is not charged under high temperature conditions caused by heat from the lighting circuit, etc., and the secondary battery life due to high temperature charging is reduced. Prevents decline.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a circuit diagram showing a first embodiment of the present invention, FIG. 2 is a circuit diagram showing the basic configuration of the same, and FIG. 3 is a circuit diagram showing a second embodiment of the present invention. FIG. 4 is a circuit diagram showing an example of a conventional lighting device, and FIG. 5 is a circuit diagram showing an example of another conventional lighting device. 1-Lighting device 5-Control circuit 7-Charging circuit 8-Charging control unit AC--Commercial power supply La-Lamp B2-Secondary battery

Claims (1)

[Claims] (1) A commercial power supply is supplied and a power source for lamp lighting is obtained from the commercial power supply, and a secondary battery is provided as a power source that is charged from the commercial power supply via a charging circuit and used for purposes other than lamp lighting. In the lighting device, the lighting device has a control circuit that controls lighting of the lamp, and has a function of controlling the lamp to turn off even when the commercial power source is connected, wherein the charging circuit is provided with a charging control section, While the control circuit is outputting a signal to turn on the lamp including a dimming state, the control circuit outputs a signal to stop charging to the charging control unit to stop charging, and the control circuit outputs a turn-off signal. 1. A lighting device characterized in that a control circuit outputs a signal to start charging to the charging control unit to charge a secondary battery only when the battery is in the middle.