WO2014038104A1

WO2014038104A1 - Led illumination device and method for controlling lighting thereof

Info

Publication number: WO2014038104A1
Application number: PCT/JP2013/000809
Authority: WO
Inventors: 智信山田; 清文伊藤
Original assignee: 株式会社ネオ・ロジス
Priority date: 2012-09-04
Filing date: 2013-02-14
Publication date: 2014-03-13
Also published as: CN103975651A; TW201412188A

Abstract

[Problem] To provide: an LED illumination device for indoor/outdoor lighting functioning as mobile lighting and as emergency-use lighting; and a method for controlling the lighting thereof. [Solution] This LED illumination device comprises: an LED array (208) arranged upon a flat surface; a secondary battery (110) for operating the LED array (208) in the event of no power supply from a commercial power source; a DC converter (202) that drives the LED array (208) and is also for charging the secondary battery (110); voltage comparison units (205, 604) that compare a probe voltage and a charge voltage for charging a secondary battery means or compare the probe voltage and a ground voltage; and a switching unit (209) that turns the output from the voltage comparison unit (205) on and off. The voltage comparison unit (205) controls so as to turn on the LED array, by outputting the output voltage for the secondary battery means during power outages, in accordance with the comparison with the probe voltage.

Description

LED lighting device and lighting control method

The present invention relates to an electric lamp device including a light emitting diode (hereinafter referred to as an LED), and more particularly to an LED lighting device for indoor / outdoor installation lighting that functions as a portable electric lamp and emergency lighting and lighting thereof. It relates to a control method.

In recent years, white LEDs and the like have become widespread, and there is a demand for power saving, and LED lighting fixtures that use LEDs as light sources are often used. Since LEDs can emit light with high brightness at a current of several mA to several tens of mA, a large-scale power supply device is not required even when used as a light bulb. Therefore, it is also used as a light source for portable electric lamps, light bulbs and fluorescent lamps, or a light source for battery-operated electric lamp devices.

In recent years, commercial power supply has been stopped in the event of a natural disaster such as an earthquake, a large typhoon, or guerrilla heavy rain. It is being done. Furthermore, even when the commercial power supply is stopped, it is necessary to evacuate quickly from a place where lighting is necessary at night or in the daytime.

However, if there is no light at night or in the daytime, for example, in underground shopping malls, subway premises, or tunnels, the commercial power supply will not be visible, and even if evacuated, there are few cases of danger. Absent. In the event of a power outage during a disaster, even if there is a backup emergency power generation facility, it cannot be said that the power line for the emergency power generation facility is sound.

Therefore, for the above-mentioned purpose, it is provided in a building exclusively for emergency lighting, or a flashlight is used as emergency lighting in the home. However, power outages occur unexpectedly, so if you forget where emergency lighting equipment and flashlights are, or if you are at night, you can not find emergency lighting equipment and flashlights and it will not be useful In some cases. Even if there is no power outage in the event of an emergency, if a power breaker is used excessively, the safety breaker will operate, all the lights in the building will be turned off, and a similar case may occur in the immediate vicinity. It is.

Various techniques have already been known to improve such problems. For example, Japanese Patent Application Laid-Open No. 2011-90970 (Patent Document 1) describes an LED emergency lighting device and uses a power failure detection circuit. A technique for automatically lighting an LED emergency lighting device in the event of a power failure is described.
However, in the technique described in Patent Document 1, although the LED lighting device can be automatically turned on at the time of a power failure, the charging line and the LED drive current supply line are shared. Therefore, there is a problem that the current supplied to the LED from the secondary battery to the LED at the time of a power failure becomes excessive, and the lighting life cannot be controlled. Overcurrent is supplied to the LED, and there is a problem in using it as an emergency lighting device in terms of the life of the LED. In addition, a secondary battery has to be prepared for each LED, and it was not versatile as a lighting fixture even in terms of cost.

Japanese Patent Application Laid-Open No. 2010-73334 (Patent Document 2) describes an LED that always functions as a stationary illumination lamp, can function as an emergency light during a power failure, and can be removed and used as a flashlight. The lamp is listed.

Patent Document 2 describes that an automatic changeover switch is provided so that an automatic changeover switch is turned on when an AC power supply is interrupted in order to automatically turn on at the time of a power failure.
However, in Patent Document 2, since both the manual operation switch and the automatic change-over switch are provided, it may be assumed that the automatic lighting operation does not function smoothly. Moreover, since a dedicated charging / switching circuit for controlling charging / switching is required, there is a concern that the circuit configuration is complicated.

As described above, although the conventional LED lighting device can provide an automatic lighting function at the time of a power failure, it cannot be said that the circuit configuration is complex or sufficient in terms of life, and is used as an emergency lighting. LED lighting could not be spread.

JP 2011-90970 A JP 2010-733334 A

The present invention has been made in view of the above-mentioned problems of the prior art, and is an illuminating device that uses an LED as a light source that can be substituted for a conventional incandescent light bulb, and automatically functions as an emergency light in the event of a power failure. It is an object of the present invention to provide an LED lighting device that is sufficient in terms of life while being simple and functions as a portable electric lamp and a lighting control method thereof.

In order to solve the above-described problems, the present invention provides an LED lighting device including a socket for an existing light source such as an incandescent lamp, a secondary battery, and an LED array arranged in a plane. The LED lighting device uses a predetermined probe voltage to determine that power from the commercial power source has been lost, and provides an emergency light function by automatically turning on.

In addition, the present invention is characterized in that manual switching by a user during indoor use is detected by a probe voltage, and is selectively turned on by an emergency light during a power failure.

According to the present invention, it is possible to recover the lighting when the commercial power source is shut off by supplying power from the secondary battery that is charged when the commercial power source is normal, and a special control device for automatic switching is necessary. In addition, it is possible to suppress the deterioration of the LED caused by leaving the LED in an unpredictable period such as driving during a power failure. Therefore, it is an illuminating device that uses an LED as a light source that can be substituted for a conventional incandescent bulb, and automatically functions as an emergency light in the event of a power failure, and it is sufficient in terms of portability and life while simplifying the circuit configuration. Furthermore, an LED illumination device that functions as a portable electric lamp and a lighting control method thereof can be provided.

The figure which shows the LED lighting apparatus of this embodiment. The figure which shows the functional block of the electrical element and member which are mounted on the printed wiring board by this embodiment. The figure which shows embodiment of the voltage comparison circuit of the voltage comparison part of this invention. The figure which shows 2nd Embodiment of the functional block of a LED lighting apparatus. The figure explaining the charging operation of this embodiment and the lighting operation of an LED array in association with the output voltage _{Vout of the} comparator. The functional block diagram which shows 2nd Embodiment of this embodiment. The figure which showed embodiment of the circuit structure of the voltage comparison part in this embodiment, and a point automatic lighting part. The figure which put together the lighting state of the LED lighting apparatus in 2nd Embodiment.

DESCRIPTION OF SYMBOLS 100 LED lighting apparatus 101 Case 102 Transparent cover 103 Socket 104 Changeover switch 105 LED
106 Holding Member 107 Ground Line 108 Charging Means 109 Printed Wiring Board 110 Secondary Battery 111 Line (Grounding)
DESCRIPTION OF SYMBOLS 112 Extension part 200 Function block 201 Switch part 202 DC conversion part 202a, b DC conversion part 203 DC-DC conversion part 204 Control resistance 205 Voltage comparison part 207 Charge control part 208 LED array 209 2nd switch part 300 Voltage comparison circuit 301 Comparator 302 Resistor 304 Resistor 305

Resistor

400, 600 LED lighting device

Hereinafter, the present invention will be described using embodiments. However, the present invention is not limited to the embodiments described below. FIG. 1 shows an embodiment of an LED lighting device 100 of the present embodiment. Further, the right hand side of the drawing with the one-dot chain line in FIG. 1 as a boundary shows various elements housed in the housing 101 by partially cutting the housing 101.

The LED lighting device 100 shown in FIG. 1 has a shape similar to an incandescent bulb, and includes a housing 101 and a socket 103 for connection to a commercial power source. The plastic casing 101 includes an extension portion 112a that accommodates the LED 105 and the like, and an extension portion 112b that is continuous with the extension portion 112a. The extension part 112a accommodates various members for controlling the lighting of the LED 105 and the LED 105 that are light sources.

A transparent cover 102 that covers the LED 105 and transmits the light from the LED 105 is provided on the upper side of the housing 101 in the drawing, and protects the LED 105 and irradiates the light generated from the LED 105 to the outside. The transparent cover 102 does not need to be transparent, and may have a light-transmitting property that allows light from the LED 105 to pass therethrough.

An LED (Light Emitting Diode) 105 is a semiconductor element that emits light when a voltage is applied. The type and form of the LED 105 that can be used in the present invention are not limited. In the present embodiment, a form in which a plurality of LEDs 105 are arranged is shown. However, a COB type (Chip On Board) in which one or a plurality of LED chips mounted on a substrate are sealed may be used, or an SMD type. (Surface Mount Device). The example of the LED 105 includes organic EL (OLEDs). The color of the LED 105 may be any color, but considering the function of the lamp, it is preferable to use an LED that reproduces the daylight color from the hue of the incandescent lamp.

The housing 101 is provided with a changeover switch 104 for switching the operation mode of the LED lighting device. In the present embodiment, the changeover switch 104 is a slide-type switch that can be switched between three contact points that can be switched between the lighting mode, the electric light mode, and the charging mode. The charging mode is a mode for charging exclusively. The lighting mode is a mode for lighting as a light, flashlight, and emergency light. The light mode is a state in which power is supplied from a commercial power source. This mode has a function to replace the so-called incandescent lamp, which only emits the LED, and stops the light emission of the LED by turning off the hand switch installed on the wall or the like at the time of power failure.

Further, the extension part 112b, which is a constituent element of the casing 101, is provided with a socket 103 having a standard such as E26, E12, E17, E27, E14, E11, and GU10 on the lower side of the paper surface. It is possible to supply commercial power to the LED lighting device 100 by screwing into a commercial power socket (female).

LED105 is hold | maintained at the holding member 106 provided with the wiring for sending a drive current to LED105. A positive electrode line and a ground line are connected from the secondary battery 110 to the lower surface (the socket 103 side) of the holding member 106, and the ground line 107 is exemplarily shown in FIG. . The ground line 107 extends from the lower surface of the holding member 106 to the ground side of the socket 103 and is connected to the inner side portion of the socket 103 on the ground side. Further, the ground line of the secondary battery 110 is also extended inside the socket 103 on the ground side, and is connected to the inside of the socket 103 on the ground side in the same manner as the ground line 107.

The secondary battery 110 is a member that can be used as a battery by storing electricity by charging. As the secondary battery of the present invention, any rechargeable battery known so far can be used. In recent years, high discharge voltages such as 3.7 V and 3.8 V can be provided, and Li-ion batteries with large capacities have become widespread, and it is preferable to use Li-ion batteries. Further, a printed wiring board 109 is fixed inside the housing 101 so as to surround the secondary battery 110. The printed wiring board 109 has a circular opening so that the secondary battery 110 can be inserted through the center thereof, and various electrical elements and members are mounted so as to surround the secondary battery 110. ing. Various electric elements and members will be described later in detail, but FIG. 1 illustrates only the charging means 108 among the elements and members. The secondary battery 110 has a positive electrode connected to the LED 105, a negative electrode grounded as indicated by a line 111, and is further charged in a lighting mode and a charging mode by a charging line connected to the charging means 108. It is said that.

The extension part 112b connecting the socket 103 of the housing 101 to the extension part 112a has a sliding double structure, the length of the extension part 112b is variable, and handling properties when used as a flashlight or the like are improved. You can also.

FIG. 2 shows a functional block 200 of electrical elements and members mounted on the printed wiring board 109 in this embodiment. Note that the same members as those shown in FIG. 1 are used as members common to FIG. If it demonstrates sequentially from the paper surface left hand side of FIG. 2, a commercial power source line will be first introduced from the socket 103 of the LED illuminating device 100 to the direct current | flow conversion part 202. FIG. The direct current converter 202 is a rectifier circuit including a transformer, a transistor, and the like, and converts alternating current of a commercial power source into direct current within a predetermined or set range. The output of the DC conversion unit 202 is then introduced into the switch unit 201.

The switch unit 201 is a member having a function of turning on / off the output of the voltage comparison unit 205 as described later. The switch unit 201 of the present embodiment can switch at least between the lighting mode and the charging mode. When the switch unit 201 is in the lighting mode (connected to the upper side of the paper), the AC current of the commercial power supply is converted into the DC-DC conversion unit 203. To be introduced. The DC-DC conversion unit 203 generates a driving voltage for driving the LED array 208, supplies an LED driving current given by the operating voltage / control resistor to the LED array 208 via the control resistor 204, and the LED lighting device Lights up. In parallel with this, in the lighting mode and the lamp mode, the output of the DC conversion unit 202 is also supplied to the charging control unit 207 so that the secondary battery 110 can be charged when the LED lighting device 100 is turned on. The LED array 208 is an array light source in which a plurality of LEDs 105 are mounted on a printed wiring board 109 as shown in FIG.

On the other hand, when the switch unit 201 is connected to the lower side of the drawing, the lamp mode is set, and the AC voltage of the commercial power supply is supplied to the charging control unit 207. The charging control unit 207 controls charging of the secondary battery 110 using the received direct current of a predetermined voltage. Note that the charging control unit 207 generates a predetermined charging voltage under constant voltage / constant current control, and performs control so that overcharging or the like does not occur.

The output of the charging control unit 207 is supplied to the secondary battery 110, and is used for charging the secondary battery 110 in the embodiment to be described. In addition, the charging voltage output from the charging control unit 207 is input to the voltage comparison unit 205 and is used to determine the interruption of the commercial power supply. Note that, as described above, the output of the DC conversion unit 202 is also supplied to the charging control unit 207 in the lighting mode and the lamp mode, and the secondary battery can be charged with a commercial power source at the same time. Thereby, since the secondary battery 110 can be always charged, LED drive power can be more reliably ensured even in an emergency.

On the other hand, the output of the secondary battery 110 is connected to the voltage comparison unit 205. The voltage comparison unit 205 compares the charging voltage with the voltage of the secondary battery 110 and controls the supply of the drive current from the secondary battery 110 to the LED array 208.

The function of the voltage comparison unit 205 will be described. The voltage comparison unit 205 compares the charging voltage (V _in ) with the output voltage (V _ref ) of the secondary battery 110, and compares the output voltage V _ref of the secondary battery 110. If it is higher, it is determined that charging is not in progress. If the voltage comparison unit 205 determines that V _in is higher than V _ref , the voltage comparison unit 205 determines that charging is in progress or lighting by a commercial power source. When charging or lighting by a commercial power supply is performed, the output is turned off (Low level), and the drive current from the secondary battery 110 is not supplied to the LED array 208.

On the other hand, the voltage comparison unit 205 outputs a drive voltage necessary for driving the LED array 208 when V _ref is higher, that is, when the battery is not charged and commercial power is not supplied. To function. The output voltage of the voltage comparison unit 205 is sent to the second switch unit 209. In addition to providing a function for switching on and off when used as a flashlight or the like in the lighting mode, the LED lighting device 100 is used to operate in the lighting mode in the present embodiment.

The second switch unit 209 can be configured as a changeover switch common to the switch unit 201, but in a specific embodiment, can be implemented as another changeover switch. More specifically, the functions of the voltage comparison unit 205 and the second switch unit 209 will be described. If the voltage comparison unit 205 determines that the battery is not being charged, the voltage comparison unit 205 generates a drive voltage for driving the LED array 208 as described above. The generated drive voltage is applied to the second switch unit 209. In the electric lamp mode (the second switch unit 209 is off), the LED lighting device 100 is a mode having a function to replace the incandescent lamp. Therefore, the drive voltage from the secondary battery 110 is not supplied to the LED array 208, and the LED array 208 is not caused to emit light.

On the other hand, when the second switch unit 209 is on, it is in the lighting mode, and it is detected that the commercial power supply is cut off and not charged, and a drive voltage for driving the LED array 208 is generated. The generated drive voltage is applied to the second switch unit 209. In this case, since the lighting mode is selected, the drive voltage from the secondary battery 110 is supplied to the LED array 208 to cause the LED array 208 to emit light.

This mode is a mode that functions as an emergency light when the LED lighting device 100 is connected to a socket of a commercial power source in the lighting mode. Further, when the LED lighting device 100 is detached from the socket, this corresponds to a mode in which the LED lighting device 100 is operated as a flashlight using a secondary battery as a power source.

The drive voltage applied to the second switch unit 209 is applied to the LED array 208 via the control resistor 204, and the LED drive current given by the operating voltage / control resistor is supplied to the LED array 208, and the LED lighting device is Light up. The control resistor 204 may be the same as or different from the control resistor connected to the DC-DC conversion unit 203 and the control resistor connected to the second switch unit 209, but in the case of driving the secondary battery 110. For the purpose of extending the operation time, it is preferable to set the maximum resistance value according to the purpose of the flashlight or emergency light.

FIG. 3 shows an embodiment of the voltage comparison circuit 300 of the voltage comparison unit 205 of the present invention. The voltage comparison circuit 300 can be configured to include a comparator 301. The operating voltage is lower than the rated output voltage of the secondary battery 110 even when the output voltage of the secondary battery 110 is used and the commercial power supply is shut off. And it works without any problems. The comparator 301 is configured as an inverting type comparator, and the negative input terminal (−) is an input voltage and the positive input terminal (+) is a reference voltage.

On the other hand, the charging voltage (V _in ) is input to the negative input terminal (−) via the resistor 302, and the voltage (V _ref ) of the secondary battery 110 is input to the positive input terminal (+) via the resistor 304. Have been entered. Since the comparator 301 is an inverting comparator, the output is turned off (Low level) when V _in ≧ V _ref, and the on output (secondary battery output voltage) is given when V _in <V _ref , A voltage equal to the voltage of the secondary battery 110 is output. Note that the resistor 305 connected to the output terminal of the comparator 301 is a pull-up resistor.

That is, when the charging voltage has a significant value exceeding 0 V, it is indicated that charging is in progress, and the charging voltage during charging is at least the output voltage of the secondary battery 110, so the commercial power supply is shut off. There is nothing. In this case, since it is not necessary to supply power from the secondary battery 110, the comparator 301 is turned off as a result of the inversion determination by the comparator 301. On the other hand, when the charging voltage is 0V, the LED lighting device 100 is in a state in which (1) the commercial power supply is interrupted, (2) the user turns off the hand switch, and (3) is used as a flashlight. V _in <V _ref is satisfied at the same time.

At this time, when it is desired to use the flashlight or the emergency light, if the power is not supplied from the secondary battery 110, the LED lighting device 100 is not useful, so the comparator 301 gives an ON output, and its output side terminal The output voltage equal to the voltage (V _ref ) of the secondary battery 110 is generated. If the user sets the second switch unit 209 in accordance with the purpose, the charging voltage (V _in ) is _in the state (2) above, in which the user simply instructs to turn off. In addition, useless power supply from the secondary battery 110 does not occur, and the secondary battery 110 is not consumed.

On the other hand, in the case of (1) and (3) above, when the user turns on the second switch unit 209, the comparator 301 already outputs the voltage (V _ref ) of the secondary battery 110 to its output terminal. Therefore, it is possible to supply current up to the limit current of the comparator 301 at the maximum. In many cases, the LED array 208 operates at about 20 mA. Therefore, if a power operational amplifier is used as the comparator 301, for example, a large LED lighting device equipped with a large number of LEDs 105 can be used. Further, according to the required output current, a transistor can be arranged on the output side of the comparator 301 to amplify the output current.

Note that when the switch unit 201 is set to the charging mode, the switch means is configured to turn off the second switch unit 209 at the same time, so that the drive current is not supplied to the LED array 208 in the charging mode. Thus, a more efficient charging operation can be performed. In yet another embodiment, a contact is formed at the upper end of the extension 112, and a contact is also formed at the lower side of the extension of the housing 101, and these contacts are turned on and off in accordance with up-down movement or rotation. A second switch 209 described later may be configured as described above. Thereby, it can respond to various lighting operation because a user switches the 2nd switch part 209 according to the usage condition of an electric light, an emergency light, and a flashlight.

By using the voltage comparison unit 205 described above, the LED lighting device 100 can be operated as a light, a flashlight, and an emergency light.

FIG. 4 shows a second embodiment of functional blocks of the LED lighting device 100. Elements having the same functions as those shown in FIG. 2 are referred to with the same reference numerals. In the embodiment shown in FIG. 4, the DC conversion unit 202 of FIG. 2 is separated into two series of

DC conversion units

202a and 202b, and functions for the lighting mode, the lamp mode, and the charging mode, respectively.

Corresponding to the difference in configuration, when the commercial power is directly input to the switch unit 201 and the switch unit 201 is connected to the upper side of the sheet, the LED lighting device 400 is caused to function as the lighting mode and the lamp mode, and When connected, the LED lighting device 400 can be operated in the charging mode. Also in the embodiment shown in FIG. 4, the voltage comparison unit 205 compares the charging voltage with the output voltage of the secondary battery 110, and determines the drive voltage of the LED array 208 from the secondary battery 110 side according to the comparison result. It can be applied.

FIG. 5 is a diagram for explaining the charging operation and the lighting operation of the LED array 208 according to the present embodiment in association with the output voltage _Vout of the comparator 301. The charging operation of the LED lighting device 100 is performed at the time of purchase and when the commercial power source is turned on. Regarding this period, the power supply from the secondary battery 110 is useless. In the LED lighting device 100 of the present embodiment, since the secondary battery is also charged at the same time during normal lighting with a commercial power supply, it is not necessary to drive in the charging mode at the time of purchase. As described above, when the switch unit 201 is set to the charging mode, the switch unit is configured so that the second switch unit 209 is turned off in conjunction with the charging of the secondary battery 110 while energizing the LED array 208. The state of doing can be avoided. Note that even if the above-described state is generated by the switch means, there is no substantial inconvenience because it is not different from the charging state in the lighting mode.

For example, a secondary battery such as a Li-ion battery has a rated output voltage of 3.7 to 3.8 V, and the voltage decreases with discharge. On the other hand, in the charging operation, in many cases, a constant current charging operation with a charging voltage Vin at least equal to or higher than the output voltage of the secondary battery is initially performed, and thereafter a constant voltage charging of 4.1 to 4.2 V is performed. The output voltage V _{out of the} secondary battery is given as a value equal to V _ref . In the embodiment shown in FIG. 5, in FIG. 5A, when charging is started, the charging voltage V _in immediately exceeds V _ref , so that the output voltage V _out of the comparator 301 transitions to 0 V, and the secondary voltage The LED array 208 is not driven by the battery.

On the other hand, when the charging mode ends, the charging voltage transitions to 0 V, and the condition of V _in <V _ref is satisfied. Therefore, as shown in FIG. 5B, the comparator 301 sets the output voltage to V _ref . The state is transitioned to This charging termination operation occurs when the switch unit 201 is switched, the LED lighting device 100 is disconnected from the commercial power source, the charging control unit 207 is turned off, or the commercial power source is shut off. At this time, if the second switch unit 209 is turned off, the LED array 208 is not lit. This state corresponds to the flashlight mode and the light mode. In this state, the LED array 208 is not turned on or off unless the user intentionally operates the second switch unit 209.

In addition, when functioning as an emergency light, the user intentionally turns on the second switch unit 209. In this state, as soon as the charging voltage becomes 0 V, the drive voltage is applied from the secondary battery 110 to the LED array 208, so that the LED array 208 is turned on, and the LED illumination device 100 is turned on in response to an unexpected interruption of the commercial power supply. To do. In yet another embodiment, when functioning as an emergency light, it is necessary to connect the extension part 112 and the extension part in advance to function as an emergency light in the event of a power failure and to function as an emergency light. In the case where there is no connection, the more efficient lighting control can be performed by using the extension unit 112 without connecting the extension unit.

FIG. 6 is a functional block diagram showing the second embodiment of the present embodiment. In many cases, indoor lighting is configured to turn on a power-stopping light so that the location of the switch can be seen when the lamp is turned off. In 2nd Embodiment, while functioning as an indoor illumination lamp, the function which turns on automatically at the time of a power failure is provided. In FIG. 6, the DC converter 601, the charge controller 602, the DC-DC converter 603, the secondary battery 605, and the LED array 610 are the same as described in the first embodiment.

6 includes a voltage comparison unit 604 for comparing voltage changes due to a power failure, a power failure automatic lighting unit 606 that automatically turns on when a power failure is determined, and an LED lighting circuit 608. This is different from the LED lighting device 100 shown in the first embodiment. The voltage comparison unit 604 is a member that compares the probe voltage with the charging voltage for charging the secondary battery 110 or the probe voltage with the ground voltage.

The LED lighting device 610 uses a so-called firefly switch 611 attached to a wall surface or the like so that the user performs lighting control of the LED lighting device 610. The firefly switch 611 has a function of turning on even when the illumination main body is switched off and extinguishing when the switch is turned on, and can include an internal resistance and a light emitting element (firefly light) such as an LED. When the firefly switch 611 is OFF, a current flows through the path on the left hand side in FIG. 6, and when it is ON, a current flows through the path on the right hand side in FIG. When the firefly switch 611 is OFF, a weak current flows, but the DC-DC converter 603 cannot be operated and the LED cannot be turned on.

Moreover, the LED lighting device 600 includes a firefly potential generation unit 612 that indicates that the firefly switch 611 is turned off. Note that the fire potential generating unit 612 illustrated in FIG. 6 only illustrates the most essential configuration, and it is needless to say that it can be mounted as a module such as a board or an IC. The firefly potential generator 612 includes a diode (a diode bridge capable of full-wave rectification), a capacitor, and a capacitor. A low current flows when the firefly switch 611 is OFF. The firefly bulb is emitting light so that it can indicate the position of the switch.

At this time, if the firefly lamp is composed of LEDs, a current of approximately several mA flows. At this time, the firefly potential generation unit 612 includes a capacitor having a capacitance C, and the capacitor is charged up to the charge Q by the potential divided by the voltage dividing resistor and approximately in the relationship represented by the following formula (1). .

In the above formula, V (t) is a potential applied to the upstream side of the capacitance of the firefly voltage generation unit 612, and the potential of the capacitor of the following formula (2) is the potential HV.

The firefly potential HV is given a constant firefly potential HV during normal operation of the LED lighting device 600 regardless of whether the firefly lamp is lit or not, indicating that the commercial power supply VAC is normal. Provide the probe potential shown. The probe potential is input to the voltage comparison unit 604. The power supply path to the LED array 610 is switched by controlling the automatic lighting unit 606 at the time of a power failure. Thereby, the LED array 610 emits light, and the LED lighting device 600 of the present embodiment exhibits a function as an emergency light.

FIG. 7 is an embodiment of a circuit configuration of the voltage comparison unit 604 and the automatic point lighting unit 606 in the present embodiment. The probe voltage is a firefly potential generated by the output voltage of the secondary battery or a weak current for turning on the light emitting element for recognizing the position of the switch when the switch is turned off. The fire potential HV, which is a probe voltage, is input to each of the two OR gates via a voltage dividing resistor. When the firefly potential (probe potential) HV has a potential indicating that the commercial power supply is normal, the OR gate 701 is asserted to L, and the firefly potential HV is a power failure potential (for example, ground potential). Are asserted high and they are all driven by the secondary battery.

The automatic power-on unit 606 at the time of a power failure can be configured to include a transistor 703, an inverter 704, and an FET 705. When the fired potential HV is a normal potential, the transistor 703 is turned off and the LED lighting circuit 608 is supplied with power from the DC-DC converter 603. At this time, since the fire potential HV itself does not operate the DC-DC converter 603, the DC-DC converter 603 does not operate, and the LED lighting circuit 608 does not operate. Also does not light up.

In the event of a power failure, the transistor 703 is turned on in response to the comparison with the probe voltage. As a result, the FET 705 is closed, the LED lighting circuit 608 is supplied with power from the secondary battery 605, and turns on the LED array 610 as an emergency light. In this embodiment, the switch 607 also functions as a switch for operating as a flashlight when the LED lighting device 600 is removed from the socket. In the case of indoor light or emergency light use, if the switch 607 is closed and connected, when the commercial power supply is normal, the power from the secondary battery 605 is supplied by the action of the fire potential HV. Instead, the LED array 610 emits light by supplying power from the trademark power supply. In addition, at the time of a power failure, the commercial power supply does not supply current, and on the other hand, the power supply from the secondary battery 605 is started by the automatic power-off control by the power failure automatic lighting unit 606 by the fire potential HV. Both the indoor light and emergency light functions can be switched smoothly without receiving any power supply.

FIG. 8 summarizes the lighting state of the LED lighting device in the second embodiment. In the second embodiment, there are three states of the LED lighting device, and the light emission state of the LED array 610 at that time is on (○) when turned on, and off (× firefly switch) when turned off (×). ) And, in the event of a power failure, the lighting (O) operation is performed. For this reason, in the event of a power outage at night or when power is lost in a tunnel or shopping district, it can be used as a flashlight by removing it from the socket and switching the switch, so it is highly portable. . Further, according to the present invention, at the time of a power failure (when the commercial power supply is interrupted), the LED as the light source is lit regardless of the lighting / non-lighting state of the LED lighting device. Therefore, it can be understood that a power failure has occurred by turning on the LED, so that preparation for switching to an emergency light application or the like can be appropriately performed.

As described above, according to the present invention, it is possible to immediately replace a conventional incandescent bulb, provide an LED lighting device that automatically functions as an emergency light during a power failure, and further functions as a portable light, and a lighting control method thereof. it can. In addition, the LED lighting device of this embodiment is not limited to home / leisure use, but may be inconvenienced by sudden interruption of commercial power, such as underground shopping streets / underpasses / tunnels, subways, runways, and heliports. It can also be used as a lighting device with low power consumption for structures.

Further, according to various purposes, the number of sockets 103 and LEDs 105, the area of the holding member for holding the LEDs 105, the capacity or the number of secondary batteries, etc. can be appropriately selected according to the specific purpose. it can.

Although the present invention has been described with the embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and other embodiments, additions, modifications, deletions, etc. It can be changed within the range that can be conceived by a trader, and any embodiment is included in the scope of the present invention as long as the effects and effects of the present invention are exhibited.

Claims

LED,
A secondary battery for operating the LED when there is no power supply from a commercial power source;
DC driving means for driving the LED and charging the secondary battery;
A voltage comparison unit for comparing a probe voltage and a charging voltage for charging the secondary battery, or a probe voltage and a ground voltage;
A switch for turning on and off the output of the voltage comparison unit,
The said voltage comparison part is an LED lighting apparatus which makes the said LED light by outputting the output voltage of the said secondary battery in response to the comparison with the said probe voltage at the time of a power failure.
The LED lighting device further includes:
A charging mode for charging the secondary battery;
When the LED lighting device is receiving power supply from the commercial power source, driving the LED while charging secondary battery means, and when the LED lighting device is not receiving power supply from the commercial power source, A lighting mode in which the LED is driven by supplying power from the secondary battery;
The LED lighting device according to claim 1, wherein the LED lighting device has a lamp mode in which power is supplied from the commercial power source.
The said probe voltage is a firefly electric potential produced | generated by the weak electric current for making the light emitting element for lighting the light emitting element for making it recognize the position of the output voltage of a secondary battery or the said switch at the time of a switch-off. LED lighting device.
Furthermore, the said secondary battery is a LED lighting apparatus of Claim 2 or 3 containing the charge control part which charges the said secondary battery by the said lighting mode and the said light mode.
The LED lighting device according to any one of claims 1 to 4, wherein the voltage comparison unit includes an inverting comparator operated by the secondary battery and a gate array.
A lighting control method for an LED lighting device according to any one of claims 1 to 5,
Comparing the probe voltage and the charging voltage for charging the secondary battery means, or the probe voltage with the ground voltage;
Turning on and off the output of the voltage comparison means;
Lighting the LED array by outputting the output voltage of the secondary battery means in the event of a power failure in response to the comparison with the probe voltage.
The lighting control according to claim 6, wherein the probe voltage is a discharge potential generated by an output voltage of a secondary battery or a weak current for lighting a light emitting element for recognizing a switch position when the switch is turned off. Method.
A charging mode for charging the secondary battery means exclusively;
When the LED lighting device is receiving power supply from a commercial power source, driving the LED array while charging secondary battery means, and when the LED lighting device is not receiving power supply from the commercial power source, A lighting mode for driving the LED array by supplying power from the secondary battery means;
And operating in a lamp mode powered by the commercial power source;
The lighting control method according to claim 6 or 7, comprising a step of charging the secondary battery means in the lighting mode and the lamp mode.
The lighting control method according to any one of claims 6 to 8, wherein the voltage comparison means includes an inverting comparator operated by the secondary battery means and a gate array.