JP4429143B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture.

In recent years, high efficiency and long life of LEDs have progressed, and accordingly, lighting fixtures using LEDs as light sources have been partially disclosed (for example, see Patent Document 1).
JP 2003-151306 A

  By the way, in the above-described prior art, there is no assumption that the voltage supply is stopped when a disaster occurs. Therefore, when voltage supply stops, it is thought that the illumination by LED cannot be maintained. However, since the function capable of maintaining lighting when the voltage supply is stopped also contributes to prevention of secondary disasters, it is an important issue in the future to provide this function in the lighting fixture.

  Therefore, an object of the present invention is to provide a luminaire that can maintain illumination even when voltage supply is stopped.

  In order to achieve the above object, a lighting fixture of the present invention includes a fluorescent lamp that is lit by receiving a voltage supply from a commercial power source, a charging element that performs charging / discharging by a voltage supplied from the commercial power source, and a voltage from the commercial power source. A charge / discharge switching unit that switches the connection of the charging element so as to discharge the charging element when charging is performed when the supply is received and the voltage supply from the commercial power supply is stopped. When the voltage supply from the commercial power supply is stopped, the LED is turned on in response to the voltage supply by the discharging of the charging element.

  Thus, when the voltage supply from the commercial power supply is received, the charging element is automatically charged, and when the voltage supply from the commercial power supply is stopped, the amount of electricity charged in the charging element. Since the LED is turned on using the LED, even when the voltage supply is stopped, the LED can be maintained as an emergency light or a night light.

  The charge / discharge switching unit connects a coil to which an electromotive force is induced by receiving a voltage supply from a commercial power source, and, when an electromotive force is induced in the coil, connects the charging element to the commercial power source side. The charging element is charged, and when the electromotive force is not induced in the coil, the charging element may include a switching element that discharges the charging element by connecting the charging element to the LED side. good.

  In addition, an inverter circuit may be provided that performs control to turn on the fluorescent lamp when receiving a voltage supply from a commercial power source.

  The charging element may be a capacitor or a lithium ion secondary battery.

  Further, the lighting fixture may have a shape of a light bulb shaped fluorescent lamp in which the LED, the charging element, and the charge / discharge switching unit are built inside the fluorescent lamp, or in a base part, The LED, the charging element, and the charge / discharge switching unit may have a round fluorescent lamp shape.

  In this way, when using LEDs, since the charging elements for LEDs have been miniaturized in recent years, it is possible to incorporate charging elements inside the fluorescent lamp and the base part, thereby changing the lighting fixture Without doing so, the LED can be used as an emergency or night light. Moreover, it can also be set as the shape compatible with the conventional lighting fixtures, such as the shape of a light bulb-type fluorescent lamp or a round fluorescent lamp.

  According to the present invention, when the voltage supply from the commercial power source is received, the charging element is automatically charged, and when the voltage supply from the commercial power source is stopped, the charging element is charged. Since the LED is turned on using an amount of electricity, the LED can be used as an emergency light or a night light even when the voltage supply is stopped.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram illustrating a circuit configuration of a lighting fixture according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a structure of the lighting fixture according to an embodiment of the present invention.

  Referring to FIG. 1, the lighting apparatus according to the present embodiment includes a fluorescent lamp 1, an inverter circuit 2, a step-down rectifier circuit 3, a constant voltage control circuit 4, a charging unit 5 including a charging element 5A, a charge / discharge operation. It is an inverter lighting type lighting fixture that is composed of a switching unit 6, a resistor 7, and an LED 8, and lights the fluorescent lamp 1 with a high frequency voltage of 40 to 50 kHz.

  The fluorescent lamp 1 is a lamp that is lit by receiving a voltage supply from a commercial power source.

  When the inverter circuit 2 is supplied with a voltage from a commercial power source, the 100 V AC voltage from the commercial power source is once rectified to be a DC voltage, and this DC voltage is switched by a switching element to turn on the fluorescent lamp 1 at a high frequency. It is a circuit to make.

  The step-down rectifier circuit 3 is a circuit that steps down and rectifies a 100 V AC voltage from the commercial power supply when receiving a voltage supply from the commercial power supply.

  The constant voltage control circuit 4 is a circuit that controls the voltage stepped down by the step-down rectifier circuit 3 to a constant voltage when receiving a voltage supply from a commercial power source.

  The charging element 5A is an element that charges and discharges with a voltage supplied from a commercial power source. Specifically, when the charging element 5A receives voltage supply from the commercial power source, the charging element 5A is charged by the constant voltage controlled by the constant voltage control circuit 4, and the voltage supply from the commercial power source is stopped. If so, the amount of electricity accumulated in the charging element 5A is discharged. 1 shows an example in which the charging element 5A is a capacitor, the charging element 5A may be a lithium ion secondary battery. Further, the charging voltage of the charging element 5A is set to 5 V or more.

  The charge / discharge switching unit 6 includes a coil 6A in which an electromotive force is induced when voltage is supplied from a commercial power source, and a charging element 5A that is connected to the commercial power source side (charging side) when an electromotive force is induced in the coil 6A. ) And a switching element 6B that connects the charging element 5A to the LED 8 side (discharge side) when no electromotive force is induced in the coil 6A. That is, the charge / discharge switching unit 6 detects whether or not the voltage is supplied from the commercial power source by the coil 6A, and when the voltage is supplied, connects the charging element 5A to the commercial power source side by the switching element 6B. Thus, when the charging element 5A is charged and the voltage supply is stopped, the charging element 5A is discharged by connecting the charging element 5A to the LED 8 side by the switching element 6B.

  The LED 8 is a high-intensity LED that is lit by receiving a voltage supply generated by discharging the charging element 5A when the voltage supply from the commercial power supply is stopped.

  Referring to FIG. 2, the lighting fixture according to the present embodiment has a shape of a light bulb shaped fluorescent lamp in which a fluorescent lamp 1 is provided inside a light bulb globe 10. The fluorescent lamp 1 includes an LED 8 and a step-down rectifier circuit 3, a constant voltage control circuit 4, a charging element 5 </ b> A, a charge / discharge switching unit 6, and the like provided in the reflection case 9. As described above, the reason why it is possible to incorporate the charging element 5A in the fluorescent lamp 1 is that the charging element 5A has been downsized along with the higher efficiency and longer life of the LED. . The lighting fixture of the present invention is a lamp having a shape in which electrodes are concentrated, such as a round fluorescent lamp, in addition to a light bulb-type fluorescent lamp, and a charging element 5A, a charge / discharge switching unit 6, an LED 8 and the like are incorporated in the cap portion. It is also possible to do.

  Hereinafter, the operation of the lighting apparatus shown in FIGS. 1 and 2 will be described.

  When an AC voltage of 100 V is supplied from a commercial power source by an operation of turning on the fluorescent lamp 1, the inverter circuit 2 operates and the fluorescent lamp 1 is turned on. At the same time, the charge / discharge switching unit 6 connects the charging element 5A to the commercial power supply side, and the AC voltage from the commercial power supply is stepped down and rectified by the step-down rectifier circuit 3, and controlled to a constant voltage by the constant voltage control circuit 4. The charging element 5A is charged by the voltage.

  On the other hand, when the supply of the AC voltage from the commercial power supply is stopped by an operation for turning off the fluorescent lamp 1 or due to a disaster, the inverter circuit 2 is stopped, and thereby the fluorescent lamp 1 is turned off. At the same time, the charge / discharge switching unit 6 connects the charging element 5A to the LED 8 side. As a result, the charging element 5A is discharged, and the LED 8 is lit by receiving the voltage supply by the discharging of the charging element 5A via the resistor 7. The LED 8 continues to be lit until the voltage supplied by the charging element 5 </ b> A drops to the forward operating voltage value of the LED 8 at the terminal portion of the LED 8.

  As described above, in the present embodiment, the charging element 5A is automatically charged when the voltage supply from the commercial power source is received, and the charging element 5A when the voltage supply from the commercial power source is stopped. Since the LED 8 is turned on using the amount of electricity charged, the LED 8 can be maintained as an emergency light or a night light even when the voltage supply is stopped.

  Moreover, since LED8 is used, what was reduced in size as the charging element 5A for LED8 can be used. Therefore, it becomes possible to incorporate the charging element 5A inside the fluorescent lamp 1 and the like, thereby enabling the LED to be used as an emergency light or a night light without changing the lighting fixture. Moreover, it can also be set as the shape compatible with the conventional lighting fixtures, such as the shape of a light bulb-type fluorescent lamp or a round fluorescent lamp.

It is a figure which shows the circuit structure of the lighting fixture by one Embodiment of this invention. It is a figure which shows the structure of the lighting fixture by one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluorescent lamp 2 Inverter circuit 3 Step-down rectifier circuit 4 Constant voltage control circuit 5A Charging element 5 Charging part 6 Charging / discharging switching part 6A Coil 6B Switching element 7 Resistance 8 LED

Claims (4)

A fluorescent lamp that illuminates upon receiving a voltage supply from a commercial power source;
A capacitor that charges and discharges with a voltage supplied from a commercial power source;
Charge / discharge switching that switches the connection of the capacitor so that the capacitor is charged when the voltage is supplied from the commercial power source and the capacitor is discharged when the voltage supply from the commercial power source is stopped And
When the voltage supply from the commercial power supply is stopped, the LED is turned on in response to the voltage supply by the discharge of the capacitor ,
A lighting fixture having a shape of a bulb-type fluorescent lamp in which the LED, the capacitor, and the charge / discharge switching unit are built inside the fluorescent lamp .   A fluorescent lamp that lights up upon receiving a voltage supply from a commercial power source;
  A capacitor that charges and discharges with a voltage supplied from a commercial power source;
  Charge / discharge switching that switches the connection of the capacitor so that the capacitor is charged when the voltage is supplied from the commercial power source, and the capacitor is discharged when the voltage supply from the commercial power source is stopped. And
  When the voltage supply from the commercial power supply is stopped, the LED is turned on in response to the voltage supply by the discharge of the capacitor,
  A lighting fixture having a shape of a round fluorescent lamp in which the LED, the capacitor, and the charge / discharge switching unit are incorporated in a base portion. The charge / discharge switching unit
A coil in which an electromotive force is induced by receiving a voltage supply from a commercial power source;
When the electromotive force to the coil is induced, the capacitor is charged the capacitor by connecting to commercial power supply side, when the electromotive force to the coil is not induced, the said capacitor LED and a switching element for discharging the capacitor by connecting to the side, the lighting device according to claim 1 or 2. The lighting fixture according to any one of claims 1 to 3 , further comprising an inverter circuit that performs control to turn on the fluorescent lamp when receiving a voltage supply from a commercial power source.

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