HK1188669B - Led illumination device for fluorescent light fixture - Google Patents

Description

Fluorescent lamp type LED lighting device

Technical Field

The present invention relates to an illumination device that can replace an LED (light emitting diode) light source used in an existing fluorescent lamp.

Background

Although fluorescent lamps are often used in lighting devices such as indoor and outdoor lighting devices, in the building standard law, it is stipulated that evacuation induction emergency lamps are installed in commercial facilities, accommodation facilities, and the like because the fluorescent lamps are not turned on in emergency situations such as power failure.

However, since the conventional emergency lamps are provided separately from the fluorescent lamps as the normal-time lighting devices, the number and the installation place of the emergency lamps are limited in practice, and therefore, only a few emergency lamps installed in a limited place are turned on in the dark during emergency. If a power failure accident due to an earthquake or fire occurs in, for example, a subway or an underground passage, there is a risk that all the persons in the area will rush to the lighting area of the emergency light and cause an accident because the persons psychologically want to move to the lighting area and the crowd psychology is also generated.

In recent years, LED lighting devices that can be used in place of conventional fluorescent lamps to save energy by saving electric power or to reduce CO have been proposed (patent documents 1 and 2 listed below, etc.) (for example)₂The LED lighting device is expected to be more widely used in the future because of its environmental friendliness, no harmful substances such as mercury, and excellent safety, but how to cope with an emergency such as a power failure has never been considered so far.

Therefore, the problems to be solved by the present invention are: an LED light source lighting device which can be used in place of a conventional fluorescent lamp is provided with a function of automatically turning on the lamp in case of an emergency such as power failure, and even if a power failure accident occurs in a subway or an underground passage due to an earthquake or a fire, everyone in the place can safely and securely take refuge to prevent an accident. Another problem to be solved by the present invention is: provided is a method for accurately controlling the lighting and the light-off of a fluorescent lamp type LED lighting device according to the supply condition of alternating current.

Disclosure of Invention

In order to solve the above problems, a fluorescent lamp type LED lighting device according to the present invention according to claim 1 is mountable between a pair of sockets provided for fluorescent lamps, and includes: a first power supply circuit for converting and rectifying the AC power supplied from the socket to obtain DC power to make the LED emit light; a second power supply circuit for lighting the LED by using a built-in battery; and a switch controller which switches a first lighting mode for lighting the LED by the first power supply circuit and charging the battery while lighting the LED by the second power supply circuit and a second lighting mode for lighting the LED by the second power supply circuit, under a normal state in which the LED is lighted by the lighting switch ON, and controls the second power supply circuit to light the LED in an emergency in which no AC power is supplied.

The invention according to claim 2 is characterized in that, in the fluorescent-lamp LED lighting device according to claim 1, the switch controller performs control so as to switch from the first lighting mode to the second lighting mode when the remaining battery power reaches a predetermined upper threshold value, and to switch from the second lighting mode to the first lighting mode when the remaining battery power reaches a lower threshold value.

The invention described in claim 3 is characterized in that, in the fluorescent lamp type LED lighting device described in claim 2, the switch controller receives a signal from the charge controller that continuously monitors the remaining amount of the battery to judge whether the remaining amount of the battery reaches the upper limit threshold or the lower limit threshold.

The invention according to claim 4 is characterized in that, in the fluorescent-lamp LED lighting device according to claim 3, the charge controller performs the sequential dimming control so that the brightness at the time of lighting the battery gradually decreases from the brightness at the time of lighting the normal power supply to the upper limit threshold value when the battery remaining capacity increases to a value close to the upper limit threshold value, and the brightness at the time of lighting the battery substantially coincides with the brightness at the time of lighting the battery when the battery remaining capacity decreases to a value close to the lower limit threshold value when the brightness at the time of lighting the battery gradually increases to the lower limit threshold value and the brightness at the time of lighting the normal power supply when the battery remaining capacity decreases to a value close to the lower limit threshold value.

The invention according to claim 5 is characterized in that, in the fluorescent lamp type LED lighting device according to claim 4, the charge controller performs sequential dimming control or sequential dimming control by increasing or decreasing the voltage or current value of the battery for a certain period of time.

The fluorescent lamp type LED lighting device according to the present invention as set forth in claim 6 is mountable between a pair of sockets provided for fluorescent lamps, and includes: a first power supply circuit for converting and rectifying the AC power supplied from the socket to obtain DC power to make the LED emit light; a second power supply circuit for lighting the LED by using a built-in battery; and a determination unit that determines which of a normal lighting mode that lights the LED using the first power supply circuit or the second power supply circuit when the lighting switch is ON, a normal light-OFF mode that lights the LED when the lighting switch is OFF, and an emergency lighting mode that lights the LED using the second power supply circuit as an emergency light when no AC power is supplied.

The invention according to claim 7 is characterized in that, in the fluorescent lamp type LED lighting device according to claim 6, the normal lighting mode includes a first normal lighting mode for charging the battery while lighting the LED by the first power supply circuit and a second normal lighting mode for lighting the LED by the second power supply circuit; the judging part judges which mode is the first normal lighting mode/the second normal lighting mode/the normal light-off mode/the emergency lighting mode.

The invention according to claim 8 is the fluorescent LED lighting device according to claim 6, wherein the determination unit detects a first energization state in which two ac wires supplying ac power necessary for driving the first power supply circuit are energized into the device and a second energization state in which ac wires provided separately from the two ac wires are energized into the device, after the LED lighting device is mounted between the pair of sockets, and determines the LED lighting-up/lighting-down mode based on the detected first and second energization states.

The invention according to claim 9 is the fluorescent LED lighting device according to claim 8, wherein the determination unit determines the first normal lighting mode when both the first and second energization states are energized, determines the normal light-off mode when the first energization state is not energized but the second energization state is energized, and determines the emergency lighting mode when both the first and second energization states are not energized.

According to the present invention as set forth in claim 1, in an emergency such as a power failure, since the battery built in the LED device is driven to cause the LED to emit light when the supply of power from the first power supply circuit is stopped without depending on a normal light-off switch operation, it is possible to turn on all of the plurality of LED lighting devices installed in the power failure place, instead of turning on only a part of the plurality of LED lighting devices in the power failure place like the conventional emergency light. Therefore, there are the following effects: even if a power failure accident occurs due to an earthquake or fire in a subway or an underground passage, everyone therein can safely and safely take refuge. Further, even when a power failure causes a sudden light-off during business hours or business hours, such as in a shop or office, the battery drive can be instantaneously switched to turn on all the LED lighting devices, and thus normal business is not hindered.

According to the invention of claim 2, when the LED is normally lighted by the first power supply circuit, the battery is charged with the remaining power, and when the battery reaches a predetermined upper threshold value, the battery is switched to drive the lighted LED, so that the amount of power used for lighting in the second lighting mode is zero. For example, if the battery is charged while lighting for 1 hour in the first lighting mode and then lighting for 3 hours in the second lighting mode is periodically controlled, even if lighting is continued for 24 hours in 1 day, the power consumption is only 6 hours in the first lighting mode, and the power consumption of the LED lighting itself is small (for example, 51W compared to the conventional fluorescent lamp, half or less of the LED, about 22W), the power consumption can be completely suppressed to 1/10 or less, and the power saving effect is extremely large.

According to the invention of claim 3, since the charge controller is provided to continuously monitor the remaining battery capacity, the switch controller can instantly and accurately judge that the remaining battery capacity reaches the upper threshold or the lower threshold by receiving a signal from the charge controller, thereby smoothly performing the switching control of the first lighting mode and the second lighting mode.

According to the invention of claim 4, since the sequential dimming control is performed to prevent a sudden decrease in brightness when the lamp light is switched from the first lighting mode of the normal power supply to the second lighting mode of the battery power supply, and the sequential dimming control is performed to prevent a sudden increase in brightness when the lamp light is switched from the second lighting mode to the first lighting mode, the feeling of excessive contrast is not generated.

According to the invention described in claim 5, the increase/decrease control of the battery voltage or current by the charge controller can be easily performed by the sequential dimming control or the sequential dimming control.

According to the invention of claim 6, since the determination unit automatically determines which of the normal lighting mode, the normal light-off mode, and the emergency lighting mode the LED lighting device should operate in, the lighting on/off of the LED can be accurately controlled according to the situation. For example, in an emergency such as a power failure, when the supply of power from the first power supply circuit is stopped without depending on the normal light-off switch operation, the determination unit automatically determines that the power is in the emergency lighting mode, and controls the LED to emit light by driving the battery built in the LED lighting device. Therefore, the following effects are provided: even if a power failure accident occurs due to an earthquake or fire in a subway or an underground passage, each person can safely and safely take refuge. Further, even when the light is suddenly turned off due to a power failure or the like during business hours or business hours in a shop, an office, or the like, the battery can be instantaneously switched to drive all the LED lighting devices to be turned on, and thus, normal business is not hindered.

According to the invention of claim 7, since the determination section determines, for the normal lighting mode, whether the LED is in the first normal lighting mode in which the battery is charged while the LED is lit by the first power supply circuit or in the second normal lighting mode in which the LED is lit by the second power supply circuit, the battery can be charged while the LED is lit by the first power supply circuit in the first normal lighting mode, and the power consumption in lighting is set to zero in the second normal lighting mode, whereby a significant power saving effect can be obtained.

According to the present invention as claimed in claims 8 and 9, it is possible to detect the energization state in which the LED lighting device is energized through three ac wires and accurately determine the LED on/off mode. In the normal lights-off mode, the battery may be charged with current from the alternating-current electric wire energized in the second energization state, and the power saving effect may be further improved by performing the battery charging in a night time period in which the electricity rate is low.

Drawings

FIG. 1 is a schematic view of a fluorescent lamp type LED lighting device according to the present invention;

FIG. 2 is a block diagram of a system using the LED lighting device;

fig. 3 is a schematic flow chart showing the control of the LED lighting device during normal lighting;

FIG. 4 is a control diagram illustrating the LED lighting device during normal lighting;

FIG. 5 is a control diagram of an embodiment of a normal ON/OFF mode with a low current flow during a power outage and with the functionality of a simple emergency light;

fig. 6 is a control diagram in the emergency lighting mode of the embodiment;

FIG. 7 is a control circuit diagram of an embodiment providing a disconnection sensor with the function of a regular emergency light;

fig. 8 is a control diagram in the normal lighting/unlighting mode of the embodiment;

fig. 9 is a control diagram in the emergency lighting mode of the embodiment.

Fig. 10 is a graph illustrating dimming/dimming control when the normal power lighting mode and the battery power lighting mode are switched.

Fig. 11 is a view showing a socket mounting state of an LED lighting device according to another embodiment;

fig. 12 is a diagram showing respective energization states when the LED lighting device is in the normal lighting mode (a), in the normal lighting mode (b), and in the emergency lighting mode (c) in the embodiment of fig. 11;

fig. 13 is a flowchart showing a control flow in the normal light-off mode.

Fig. 14 is a flowchart showing a control flow in the normal light-off mode in which the battery is charged during the night time period;

fig. 15 is a schematic cross-sectional view showing an example of a lamp cover structure and an internal structure of the fluorescent lamp type LED lighting device of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail with reference to fig. 1 and 2. The LED lighting device 10 can be used in place of a conventional fluorescent lamp, has substantially the same size and shape as a conventional fluorescent lamp, and can be mounted between a pair of sockets provided for a conventional fluorescent lamp. The LED lighting device 10 is housed in a housing 11 having a substantially cylindrical cross section, and an LED mounting plate (not shown) is fixed thereto, so that light emitted from the LED22 is diffused and illuminated through the housing 11. In one embodiment, the globe 11 is composed of 2 members divided approximately in half-circles, that is, a cover body made of a plastic material having transparency, translucency, or light scattering properties such as polycarbonate, and a heat sink made of a heat dissipating material such as aluminum, and the cover body incorporates an LED mounting board, and the heat sink incorporates a battery and other power supply circuits described later.

As is known in patent documents 1 and 2, the LED lighting device 10 includes a power supply circuit (first power supply circuit 13) which is attached to a conventional fluorescent socket (not shown) via a socket portion 12, converts and rectifies ac power supplied from the socket into dc power, and supplies the dc power to an LED drive circuit 15, thereby causing an LED22 on a substrate to emit light. The first power supply circuit 13 includes an AC-DC converter 24 (not shown in fig. 2, 1) for converting AC power to DC power, a rectifier 16 for rectifying the DC power output from the AC-DC converter 24, a voltage transformer 17 for converting the DC power to a predetermined voltage, an electrolytic capacitor 18 (not shown in fig. 1, 2) for operating as a buffer for temporarily storing power and stabilizing the power supply, and the like. As will be described later, in a normal state, as a fluorescent lighting apparatus, the first power supply circuit 13 supplies a direct current to the LED drive circuit 15 by turning ON the external switch 27 provided ON a wall or the like to cause the LED22 to emit light to turn ON the LED lighting device 10, and turns OFF the LED device 10 by turning OFF the switch 27.

The LED lighting device 10 also has a second power supply circuit 20 that causes the LED22 to emit light using the battery 19. In order to maximize the LED lighting time of the battery 19, it is preferable that the battery 19 is a small battery which can be accommodated in the lighting cover 11 and has a large capacitance as much as possible, and at present, a lithium ion battery is most suitable. The switch controller 14 controls the switching of the power supply circuits 13 and 20 for lighting the LED22 by controlling the IC switch 25 provided in the first power supply circuit 13 to be opened and closed under predetermined conditions. The charge controller 21 continuously monitors the battery remaining capacity by detecting the voltage and current of the battery 19, and signals the switch controller 14 when the battery remaining capacity reaches an upper threshold or a lower threshold. Alternatively, the internal IC switch 25 may store the upper limit threshold and the lower limit threshold of the remaining battery as product specifications or user setting values in advance, and may determine that the upper limit threshold and the lower limit threshold are reached by receiving a remaining battery detection signal from the charge controller 21. And, particularly, it is necessary to strictly control the voltage at the time of charging and discharging the lithium ion battery, so the charge controller 21 controls such that the voltage of 4.2V is maintained at the time of charging and the voltage of 3.0V is maintained at the time of discharging. The following describes specific control of the switching controller 14 and the charging controller 21 (constituting the "control unit" of the present invention).

First, a schematic flow of control will be described with reference to a flowchart shown in fig. 3. Assuming that a normal operation (an external switch 27: ON described later) for lighting all or a part of the LED lighting device groups arbitrarily divided in the facility is performed (S100), it is checked in S101 whether or not a desired ac current is supplied to the facility such as an office or a store where the plurality of LED lighting devices 10 are installed. This step can be performed by, for example, connecting a current meter and/or a voltage meter to an ac power line for supplying ac power to all or a part of the LED lighting device 10 groups arbitrarily divided in the facility, and continuously monitoring the current value and/or the voltage value flowing in the ac power line.

When the power-on is confirmed (YES in S101), it is confirmed in S102 whether or not the power for starting the lighting of the LED is left only in the battery 19. That is, an upper limit threshold value is predetermined for the remaining battery power required for starting lighting of the LEDs by the battery 19, and if the remaining battery power is lower than the upper limit threshold value (no in S102), the control is performed to the first normal lighting mode in which the LED driving circuit 15 is driven to light the LEDs using the direct current obtained by converting and rectifying the alternating current supplied to each LED lighting device 10 and the battery 19 is charged (S103). As an example, the total luminous flux of the LED lighting device 10 is 2500Lm, and the power consumption is 22-25W. In the operation in the first normal lighting mode, the battery remaining amount is monitored in S104, and the operation in the first normal lighting mode is continued until the battery remaining amount is restored to the upper limit threshold or more (yes in S104).

On the other hand, when the remaining battery power is equal to or higher than the threshold (yes in S102), the control is performed to the second normal lighting mode in which the LED drive circuit 15 is driven only by the battery 19 to light the LED22 (S105). In the second normal lighting mode, as an example, the total luminous flux of the LED lighting device 10 is 1900Lm, and at this time, the power consumption is zero because no ac power is used. In the operation in the second normal lighting mode, the battery remaining capacity is monitored in S106, and the operation in the second normal lighting mode is continued as long as the battery remaining capacity is equal to or more than a predetermined lower limit threshold (yes in S106).

When the battery 19 is charged during the operation in the first normal lighting mode and as a result, the remaining battery capacity is restored to the upper limit threshold value or more (yes in S104), the mode is switched from the first normal lighting mode to the second normal lighting mode. When the battery 19 is discharged during the operation in the second normal lighting mode so that the remaining battery capacity is lower than the lower limit threshold (S106: no), the second normal lighting mode is switched to the first normal lighting mode.

When the power supply is not confirmed in S101 (S101: NO), in S107, it is determined whether the power supply is not supplied by a normal light-off operation or by a power failure in emergency. The specific method of this determination will be described in detail later. If it is determined that the power supply is not the non-power supply due to the emergency power failure (S107: NO), the power supply is not the power supply due to the normal operation (the external switch 27: OFF described later) for turning on all or a part of the LED lighting devices 10 arbitrarily divided in the facility, and therefore the LED lighting devices 10 are turned OFF as the normal light-OFF mode (S111). At this time, the battery 19 is charged by supplying ac power to the LED lighting device 10 without stopping the power supply (described later).

When it is determined that the power is off in the emergency (yes in S107), the LED lighting device 10 is controlled in the emergency lighting mode in S108. In this case, the LED lighting device 10 functions as an emergency light, and therefore, the total luminous flux is 400 to 500Lm, which is sufficient for practical use, and the power consumption is zero because the LED22 emits light by driving the LED driving circuit 15 only with the battery 19. Since the battery 19 is gradually discharged when the LED lighting device 10 is turned on in this emergency lighting mode, it is checked in S109 whether or not the battery remaining charge is sufficient to continue lighting the LED as an emergency lamp using only the battery 19. Specifically, a lower limit threshold value is predetermined for the remaining battery power required for continuing the lighting of the emergency lamp, and when the remaining battery power exceeds the lower limit threshold value (yes in S109), the lighting of the emergency lamp is continued, and when the remaining battery power falls below the lower limit threshold value (no in S109), the LED lighting device 10 is forcibly turned off (S110). Thereby, the battery 19 can be prevented from being completely discharged.

The remaining battery level check performed in S102, S104, S106, and S109 (and S112, S113 in fig. 12 and S112, S113, and S115 in fig. 13 described later) may be performed by monitoring the voltage value and/or the current value of the battery 19 continuously or at regular intervals, or may be performed using a single sensor. For example, a signal larger than or smaller than the upper threshold (for example, a voltage value of 90% of full charge) may be transmitted, and the determinations in S102 and S104 may be performed based on the signal, a signal larger than or smaller than the lower threshold (for example, a voltage value of 20% of full charge) may be transmitted, the determination in S106 may be performed based on the signal, a signal larger than or smaller than the lower threshold (for example, a voltage value of 10% of full charge) may be transmitted, and the determination in S109 may be performed based on the signal. The lower limit threshold for determination in S106 and S109 may be the same, but as described above, the lower limit threshold used in S109 is preferably set to a relatively low value so as to prevent the battery 19 from being completely discharged and to maintain the function as an emergency light for a longer period of time.

The control when the external switch 27 is turned ON, that is, the control S103 to S106 in the normal lighting mode in the flowchart of fig. 3 will be described with reference to fig. 3 and 4, where the external switch 27 is provided ON a wall or the like in a facility to turn ON and off the lighting device 10. At this time, the switch controller 14 switches, according to the charged state of the battery 19 (determined in fig. 3: S102), the internal IC switch 25 between a first lighting mode (fig. 3: S103, fig. 4 (a)) in which the battery 19 is charged while the LED driving circuit 15 is driven to light the LED22 using the direct current obtained by converting and rectifying the alternating current supplied from the in-facility switchboard 26 to each LED lighting device and a second normal lighting mode (fig. 3: S105, fig. 4 (b)) in which the LED driving circuit 15 is driven to light the LED22 using only the battery 19 without consuming the alternating current when the battery 19 is in a fully charged state.

More specifically, when the external switch 27 is turned ON in a state where the power supply from the in-facility substation 26 is normally performed (yes in S101), the battery 19 is gradually charged while the LED22 is lit in the first normal lighting mode, and when a detection signal indicating that the remaining battery charge has reached a predetermined upper limit threshold value is received from the charge controller 21 (yes in S104), the switch controller 14 turns OFF the internal IC switch 25 and switches from the first normal lighting mode to the second normal lighting mode. Then, while the LED22 is lit in the second normal lighting mode, the battery 19 is gradually drained, and when a detection signal indicating that the remaining battery capacity has reached the lower limit threshold value is received from the charge controller 21 (S106: no), the switch controller 14 turns ON the internal IC switch 25 and switches from the second normal lighting mode to the first normal lighting mode. Alternatively, the time interval at which the LED22 is turned on in the first normal lighting mode and the second normal lighting mode may be set in advance (for example, a cycle in which the LED is turned on in the second normal lighting mode for three hours after the LED is turned on in the first normal lighting mode for one hour is repeated), and the first normal lighting mode and the second normal lighting mode may be switched at the time interval. At this time, it is preferable to forcibly switch to the first normal lighting mode to prevent the battery 19 from being excessively discharged even during the set time when the remaining battery level reaches the predetermined lower threshold during the lighting in the second normal lighting mode in combination with the control of the remaining battery level.

When the external switch 27 is turned OFF from the time of the normal lighting, the power supplied to the lighting device 10 is momentarily stopped, and therefore, when this is detected by the switch controller 14 (S101: no), the LED driving circuit 15 is turned OFF and the LED22 is turned OFF. As described above, when the ac power supply from the main power supply is normal, the LED22 is turned ON/OFF in conjunction with the ON/OFF of the external switch 27, and is turned ON/OFF in a normal state.

When the ac power supply to the main power supply is interrupted due to a power failure or the like, the fluorescent LED lighting device 10 of the present invention is also configured to forcibly switch the LED22 to the second power supply circuit 20 and turn on the LED22 using the battery 19 to function as an emergency light, assuming that the LED22 is turned on in the normal lighting mode (first normal lighting mode) of the first power supply circuit 13. The building standards act stipulates that emergency lamps, which are lighting devices for evacuation guidance that illuminate the room or corridor when there is a power failure, must be installed in commercial facilities, industrial facilities, accommodation facilities, and the like. Under the legal installation obligation, the emergency lamp must be kept in a lighting state for several tens of minutes to several hours at a certain brightness (for example, a floor surface brightness of 1 lux) during a power failure regardless of whether the external switch 27 is ON/OFF, and therefore, a third wire for the emergency lamp is separately installed from two ac wires for normal lighting (1 wire is used together with the emergency lamp).

However, it is considered that the lighting LED22 actually functions as an emergency light sufficiently effectively when the external switch 27 is turned ON normally (in the first normal lighting mode or the second normal lighting mode) in a normal shop, an office, or the like other than the public facilities, and the power is suddenly turned off. Further, depending on the floor area or the number of floors of the facility to be installed, the emergency light wire may not be installed, and in this case, the system structure that functions as a simple emergency light is still effective. From these viewpoints, one embodiment of the present invention is configured to determine a power failure by causing a weak circuit to flow into a circuit by the switch controller 14, and to provide a function of a simple emergency light. The structure and operation of this embodiment will be described below with reference to fig. 5 and 6 in addition to fig. 1 to 3.

While some of the above description is repeated, in a system in which a plurality of LED lighting devices 10 having the configuration shown in fig. 2 are connected to a main power supply (ac power), the control in the normal lighting/extinction mode in which the LEDs 22 are turned ON/OFF in conjunction with ON/OFF of the external switch 27 will be described again. At this time, the in-facility electrical distribution board 26 is ON. When the external switch 27 is ON, the switch controller 14 controls the internal IC switch 25 to be ON/OFF based ON the remaining battery power, and switches between normal lighting in a first normal lighting mode (fig. 3: S103, fig. 4 (a)) for lighting the LED via the first power supply circuit 13 by using direct current (normal power) obtained by converting alternating current power and normal lighting in a second normal lighting mode (fig. 3: S105, fig. 4 (b)) for lighting the LED via the second power supply circuit 20 by using direct current (battery power) stored in the battery 19 under predetermined control conditions (fig. 5: state a-1).

When the external switch 27 is turned OFF in this state, the switch controller 14 detects the power supplied to the lighting apparatus 10 which is momentarily stopped (S11) and causes a weak current to flow into the ac circuit of the main power supply (S12), but since the external switch 27 is turned OFF, it detects a circuit disconnection state (the weak current which has flowed is not returned) (S13). At this time, the switch controller 14 judges that it is normal light-OFF by the OFF operation of the external switch 27, and turns OFF the LED22 even in any one of the normal lighting modes (i.e., regardless of whether lighting in the first normal lighting mode or lighting in the second normal lighting mode) (fig. 5: state a-2). The detection of the instantaneous power failure can be performed by the switch controller 14 continuously monitoring the voltage and detecting an instantaneous and rapid voltage drop (the same applies hereinafter).

Control when a power failure occurs in the normal lighting state (a-1) will be described with reference to fig. 5. This control is executed in step S107 and thereafter in the flowchart of fig. 3. At this time, the switch controller 14 detects that the power supply to the lighting apparatus 10 is momentarily stopped (S14), and therefore, a weak current flows into the ac circuit of the main power supply (S15), but even if the power supply to the in-facility electrical panel 26 is interrupted, the external switch 27 remains ON, and therefore the circuit itself is established, and therefore, it detects that the circuit is not in the open state (the flowing weak current returns through the circuit) (S16). At this time, the switch controller 14 determines that a power failure has occurred, and drives the LED driving circuit 15 whenever the external switch 27 is ON, regardless of whether the IC switch 25 is ON/OFF (in other words, regardless of whether lighting in the first normal lighting mode or lighting in the second normal lighting mode). Even if the internal IC switch 25 is ON/OFF, the second power supply circuit 20 functions as a closed circuit, and thus the battery 19 can be used as a power supply to light the LED22 to function as an emergency light (fig. 6: state a-3).

In this embodiment, even if a power failure occurs when the external switch 27 is OFF (state a-2 in fig. 5), the switch controller 14 does not input a detection signal of an instantaneous power failure because the lighting apparatus 10 is not originally powered (S14). Therefore, in this embodiment, even if power failure occurs when the external switch 27 is OFF, the LED22 cannot be turned on to function as an emergency light.

Next, the structure and operation of the embodiment having the normal emergency light function will be described with reference to fig. 7 to 9. The configuration of the lighting system according to this embodiment (fig. 7) is substantially the same as the configuration of the lighting system according to the above-described embodiment (fig. 2), but the disconnection sensor 28 that detects whether or not the switchboard 26 in the facility is in the energized state is connected by detecting the current from the other electric wire 31, instead of detecting the currents of the electric wires 29, 30 that supply current to the AC-DC converter 24 in the lighting apparatus 10, and the detection signal thereof is input to the switching controller 14.

In this system, control in a normal lighting/extinction mode in which the LEDs 22 are turned ON/OFF in conjunction with ON/OFF of the external switch 27 when the plurality of LED lighting devices 10 are connected to a main power supply (main ac power supply) will be described. At this time, the in-facility electrical distribution board 26 is ON. Then, the switch controller 14 controls the internal IC switch 25 to ON/OFF based ON the battery remaining power when the external switch 27 is ON, and switches the normal lighting in the first normal lighting mode of the normal power supply (FIG. 3: S103, FIG. 4 (a)) and the normal lighting in the second normal lighting mode of the battery power supply (FIG. 3: S105, FIG. 4 (B)) under prescribed conditions (FIG. 8: state B-1).

When the external switch 27 is turned OFF according to this state, the switch controller 14 detects that the power supply to the lighting device 10 is momentarily stopped (S21), and confirms that the power is supplied from the third electric wire 31 as usual according to the signal from the disconnection sensor 28 (S22). At this time, the switch controller 14 judges that the lighting is normally turned OFF by the OFF operation of the external switch 27, and turns OFF the LED22 by turning OFF the LED driving circuit 15 even in any lighting mode (FIG. 8: state B-2). The control in this case is substantially the same as the control in the normal lighting/extinction mode described with reference to fig. 5 in the above embodiment.

Control when a power failure occurs in a normally on state (B-1) or a normally off state (B-2) will be described with reference to FIG. 9. At this time, the switch controller 14 confirms the interruption of the power supply from the third electric wire 31 based ON the signal from the cut-OFF sensor 28 (S24) regardless of whether the detection signal of the instantaneous power failure is input (S23) (in other words, regardless of whether the external switch 27 is ON/OFF). At this time, the switch controller 14 may drive the LED driving circuit 15 after determining that the power failure has occurred, and turn on the LED22 using the battery 19 as a power source to function as an emergency light (fig. 9: state B-3).

According to this embodiment, even in the normal lighting state (B-1) generated by the external switch ON (i.e., regardless of whether the internal IC switch 25 is ON/OFF, in other words, regardless of whether the normal lighting of the first normal lighting mode or the normal lighting of the second normal lighting mode), and even in the normal lighting state (B-2) generated by the external switch 27OFF, since the disconnection sensor 28 detects the occurrence of the power failure, it is possible to light the LED illumination device 10 as the power supply using the battery 19 as the emergency light.

As described above, when the remaining battery power monitored by the charge controller 21 reaches the predetermined upper limit threshold or lower limit threshold, the switching control between the first lighting mode and the second lighting mode at the time of normal lighting is performed, but in the first lighting mode of the normal power supply and the second lighting mode of the battery power supply, the difference in the voltage value of the power supply that lights the LED22 may cause the luminance of the latter to slightly decrease. Therefore, in order to avoid the sudden decrease of the brightness when the lighting mode is switched from the former to the latter, and to avoid the sudden increase of the brightness when the lighting mode is switched from the latter to the former, which causes a feeling of too large contrast, the brightness can be controlled by sequentially dimming/sequentially increasing the brightness when the lighting mode is switched, so that the energy saving property of suppressing the power consumption of the battery and prolonging the lighting time in the second normal lighting mode can be achieved, and the comfortable feeling of not feeling the brightness change can be achieved.

Referring to fig. 10, for example, when the timing of switching the lighting mode is set to the upper threshold =80% and the lower threshold =20%, the control is performed so that the luminance at the time of lighting the battery is substantially matched when the remaining battery level rises to a value Ld (for example, 60%) close to the upper threshold during the operation in the first normal lighting mode of the normal power supply (first power supply circuit 13) and the luminance is gradually reduced from the luminance at the time of lighting the normal power supply and the upper threshold 80% is switched to the second normal lighting mode of the battery 19 (P4). When the remaining battery charge falls to the lower limit threshold (20%) during the operation in the second normal lighting mode of the battery (P1), the mode is switched to the first lighting mode of the normal power supply, and the LED lighting is gradually increased from the lighting at the lighting of the battery, and the control is performed so as to substantially match the lighting at the lighting of the normal power supply. That is, in fig. 10, the LED22 is lit in the first normal lighting mode of the normal power supply during the period from P1 to P4, but light is sequentially increased in the periods from P1 to P2, constant brightness at the time of lighting of the normal power supply is maintained in the periods from P2 to P3, and light is sequentially decreased in the periods from P3 to P4. The sequential dimming/dimming can be realized by gradually increasing or decreasing the voltage or current value of the battery 19 for a certain period of time, for example, by increasing or decreasing the voltage by several tenths of volts V (0.1V, 0.2V, etc.) every 1 minute, and by increasing or decreasing the current number mA every minute. The threshold value of the remaining battery level (in this example, the dimming start timing: 60% and the dimming start timing: 20%) at which the start timing of the sequential dimming/dimming is reached is held by the charge controller 21 to the product specification or the user setting value.

The sequential dimming/dimming control shown in fig. 10 is an example, and any specific control method may be adopted as long as the sequential dimming control is performed so that the brightness at the time of lighting the battery is substantially matched at the latest when the first normal lighting mode is switched to the second normal lighting mode, and the sequential dimming control is performed so that the brightness at the time of lighting the battery is rapidly substantially matched with the brightness at the time of lighting the normal power supply from the time when the second normal lighting mode is switched to the first normal lighting mode. Further, as described above, the sequential light-increasing control is performed by switching from the second normal lighting mode to the first normal lighting mode at the start timing thereof and performing the sequential light-increasing control in the first normal lighting mode, but is preferable from the 2 viewpoints of minimizing the consumption of the battery 19 and simplifying the control of the battery 19.

In addition, the charge controller 21 can reduce the consumption of the battery 19 and light the battery 19 as an emergency lamp for a long time by lighting the LED22 as an emergency lamp (emergency lighting mode: state a-3 of fig. 6, state B-3 of fig. 9) by using the voltage and current values for the emergency lamp (product specification or user setting, for example, 30% of the normal power when lighting) prestored in the internal IC switch 25 during the power failure. The brightness in the emergency lighting mode may be a brightness and a configuration in which the ceiling height of each installation is 2 lux or more in the fire control law, and the lighting state may be maintained for 24 hours at most by setting the voltage/current for emergency lighting to a low value within a range satisfying the brightness reference.

In addition, even if the battery remaining capacity gradually decreases in the emergency lighting mode, in this case, it is preferable to control to continue the emergency lighting even if the battery remaining capacity falls below the lower limit threshold value as long as the overdischarge does not occur. Namely, FIG. 3: the lower limit threshold in S109 is set to a value lower than the lower limit threshold (S106) at the time of switching to the normal lighting mode, and emergency lighting can be continued for a long time.

FIGS. 11 and 12 show another embodiment for determining the occurrence of a power failure (FIG. 3: S107). In this embodiment as well, in the first normal lighting mode in which the AC-DC converter 24 in the LED lighting device 10 is energized, and at the same time as the LED lighting device 10 is turned on, currents from the other electric wire 31, which are different from the currents from the electric wires 29, 30 that charge the battery 19, are respectively provided in either of the outlets 32a, 32b (the outlet 32a in fig. 11, 12) of the outlets 32, 32 at both ends in the longitudinal direction of the fluorescent lamp installation device, as in the embodiment shown in fig. 7 to 9. Therefore, when the LED lighting device 10 is installed between the sockets 32, 32 at both ends (that is, when the pins 12a, 12b of the respective socket portions 12 of the LED lighting device 10 are inserted into the sockets 32a, 32b of the respective sockets 32) as long as the ac power supply from the in-facility electrical panel 26 is performed (in other words, in a non-power-off state), the current from the electric wire 31 flows into the LED lighting device 10 through the socket 32a and the pin 12 a. In this embodiment, the IC chip 33 built in the LED control device 10 determines the presence or absence of a power failure based on the energization state of the three wires 29, 30, and 31. This IC chip constitutes the "control section" of the present invention, and corresponds to the switch controller 14 in the above-described embodiment. Other components and elements built in the LED lighting device 10 are not illustrated in fig. 11 and 12. In the above description, the current from the electric wire 31 is caused to flow into the socket 32a of one of the sockets 32, 32 at both ends, but the current may be caused to flow into both the sockets 32a, 32b of the sockets 32, 32 at both ends, or the current may be caused to flow into one or both the sockets 32a, 32b of the socket 32 at one end.

When the external switch 27 is turned ON and ac power is supplied from the in-facility distribution board 26 to each LED lighting device 10, since all 3 wires are energized, control in the normal lighting mode (fig. 12 a) is performed at this time, and as described above, the first normal lighting mode (fig. 3: S103, fig. 4 (a)) for lighting the LEDs via the first power supply circuit 13 and the second normal lighting mode (fig. 3: S105, fig. 4 (b)) for lighting the LEDs via the second power supply circuit 20 by the battery power are switched under predetermined control conditions mainly according to the remaining battery power.

When the ac power line from the in-facility substation 26 is energized but the external switch 27 is OFF, only the power line 31 is in the energized state, and therefore, at this time, control in the normal light-OFF mode is performed (fig. 12 (b)), the LED lighting device 10 is turned OFF (S111), and the battery 19 is charged with the ac power supplied from the power line 31.

When all the electric wires 29, 30, 31 are not energized (fig. 12 c), even if the external switch 27 is ON/OFF, since it is indicated that the ac electric wire itself from the in-facility substation 26 is not energized, it is determined that emergency power failure is occurring (S107: yes) at this time, and control is performed after S108. At this time, as long as the remaining capacity of the battery 19 is not less than the lower threshold (S109: YES), the LED lighting device 10 continues to light as an emergency lamp using the battery power. At this time, when a predetermined time (for example, 30 minutes) has elapsed after the start of lighting as the emergency light, the timer is used in combination, and the automatic light-off control is performed even if the remaining battery power is equal to or more than the lower limit threshold.

In this embodiment, since the IC chip 33 detects the conduction states of the three ac electric wires 29, 30, and 31 and determines the presence or absence of a power failure based on the detection result, steps S101 and S107 in the flowchart of fig. 3 are executed at the same time.

As described above in relation to the embodiments, the LED22 can be turned on by the battery 19 under the control of the switch controller 14 without depending on the normal light-off switch operation when the light is turned off, and thus can function as an emergency light. Since a part of the conventional emergency lamp is provided separately from the fluorescent lamp which is a normal lighting, only the emergency lamp is turned on in a power failure place, but according to the present invention, all the LED lighting devices 10 connected to the ac power supply circuit in which the power failure occurs can be turned on as the emergency lamps, and therefore, in particular, even in a case where a power failure accident occurs due to an earthquake or a fire in a subway or an underground passage, evacuation can be smoothly conducted without fear. Further, the lighting system can be constructed to be useful even in a general office or the like.

Fig. 13 is a flowchart showing a control flow of the normal lighting mode (fig. 3: S111) executed when the external switch 27 is OFF during normal non-energization (S107: no) without power failure. First, in S112, the battery remaining capacity is confirmed. When it is confirmed that the voltage is equal to or lower than a predetermined lower threshold (for example, a voltage value of 20% of full charge) (S112: NO), the battery 19 is charged with the AC power supplied from the AC power line 31 (S113). Thus, when the remaining battery capacity is restored to the predetermined upper threshold (for example, a voltage value of 90% of full discharge) (S114: YES), the process returns to S112, and when the remaining battery capacity is lower than the lower threshold (S112: NO), the battery charging is resumed (S113).

In the case of the embodiment in which the control for charging the battery 19 with ac power is performed when the external switch 27 is OFF, it is preferable to perform battery charging in a time zone where the electricity charge is low, such as at night, in order to reduce the cost. For example, in the case of tokyo electric power, the electric power rate is low at night from 10 pm to 8 pm, and therefore, by charging the battery during this night time, the LED lighting device 10 is turned on (in the second normal lighting mode) outside the night time (during the daytime) using the battery 19 that is substantially fully charged, and the electric power rate can be reduced to the maximum.

For example, according to the embodiment shown in fig. 11 and 12, since it is needless to say that the battery 19 can be charged using the ac power line 31 when the external switch 27 is ON, even when the external switch 27 is OFF, the clock function of the IC chip 33 can be effectively used, and thus the battery 19 can be charged with the nighttime power. At this time, only the electric wire 31 is in the energized state (fig. 12 (b)), and therefore, this state is detected, and the control in the normal light-off mode (S111) is started. The control flow at this time is shown in fig. 14. This control flow is similar to the control flow shown in fig. 12, but a step S115 is added, and when the normal light-off mode is entered (S111), the step S115 determines whether or not the current time is a night time zone. If it is determined in S115 that the time zone is the night time zone (yes in S115), the process proceeds to the battery remaining capacity checking step S112, where control for charging the battery is performed, but the process waits until the night time zone is entered in a non-night time zone (no in S115).

The above control is an example, and when a time zone (such as a daytime zone) in which the electric power rate is high and a time zone (such as a nighttime zone) in which the electric power rate is low are set, any control method may be adopted if the battery 19 is charged in the nighttime zone and the battery 19 is fully charged before the daytime zone starts. For example, the electric power during charging may be adjusted so as to be fully charged before the end of the night time period based on the remaining battery capacity ascertained from the current value, the voltage value, or the like and the remaining time before the start of the day time period. For example, if the charging process is started at 6 am, the charging power is adjusted based on the current value and/or the voltage value of the battery 19, and the battery 19 is fully charged before the end of the night time period, the most effective charging control can be performed. The time setting may be arbitrarily changed in accordance with a contract system of a power company in which the LED lighting device 10 is installed.

The LED lighting device 10 incorporates a communication control chip 23 (see fig. 1 and 2). Since the communication control chip 23 gives an inherent IP address to each LED lighting device 10, a management server (not shown) connected to the communication control chip and capable of transmitting and receiving data via a network or the like can identify the LED lighting device 10 of the transmission source by referring to the inherent IP address after receiving the data transmitted from the specific LED lighting device 10 via the communication chip 23. Further, the control data may be transmitted from the management server to a specific LED lighting device 10. Therefore, the management server can collectively set and change the control contents (for example, setting values for various controls) executed by the LED lighting devices 10 under its management for all the LED lighting devices 10, or can set and change only a specific LED lighting device based on a specific IP address, or can individually set and change each LED lighting device 10 based on a specific IP address.

More specifically, the LED lighting devices 10 may be collectively and remotely managed for each lighting installation location in a store, for example. That is, since the sunrise and sunset times are different from place to place and the sunshine time is different from place to place in japan and from north to south, the amount of light required in the store is different depending on the place and time zone. Further, the amount of light required in the store varies greatly and varies from time to time depending on the installation environment of the store, the orientation of the opening such as a door, the season, the weather of the day, and the like. Such a real-time change cannot be completely handled by the control of the control program built in each LED lighting device 10 in many cases, and thus a chain store or the like where many shops are opened nationwide causes an invisible waste as a whole. In order to cope with this variation, an identifier ID is set in advance for each LED lighting device 10, and each LED lighting device 10 is individually associated with various information such as position information (latitude and longitude) of a store and sunlight data of its position, an orientation of an opening, a lighting installation position, a season, and weather forecast data of the day. Thus, the LED lighting devices 10 at the respective installation positions in the respective stores can be collectively managed by the management server, and there is no need to rely on a control program built in each LED lighting device 10. The various information stored in the identifier ID set in each LED lighting device 10 can be changed at any time by remote operation of the management server.

On the other hand, there are also the following cases: if a situation not assumed in the initial setting, such as a sudden weather change or an emergency work in an adjacent building, occurs in the field, it is difficult for the management server to accurately grasp the situation and it is not always appropriate to control the situation by the setting of the management server. In order to cope with this, the communication control chip 23 can perform lighting control that can cope with a sudden situation change by setting a priority in advance under a predetermined condition between a signal from the management server and information that the LED lighting device 10 itself has.

The above system architecture is only illustrative of the application of the present invention. Since the LED lighting device 10 to which a unique IP address or ID is assigned is network-connected to the management server so as to be capable of transmitting and receiving data, the LED lighting device 10 can be remotely controlled by transmitting a control signal from the management server to a specific or arbitrary LED lighting device 10 to turn on and off the LED lighting device 10 individually or collectively, or to operate an instrument or the like incorporated in another LED lighting device 10 or associated with another LED lighting device, and the management server receiving the transmission data from the LED lighting device 10 can be effectively used for automatic maintenance, inspection, protection, or the like after specifying the transmission source LED lighting device 10 at the moment.

Fig. 15 is a schematic sectional view showing a preferred example of the structure and the internal structure of the lamp housing of the fluorescent lamp type LED lighting device 10 according to the present invention. According to this embodiment, a power supply portion including the first power supply circuit 13, the battery 19, the second power supply circuit 20, and the like is housed in a space of the aluminum heat sink 34 formed in a substantially cylindrical shape in cross section, the LED mounter plate 37 is fixed to the flat plate portion 35 of the heat sink 34 via the high reflection sheet 36, and the plurality of LEDs 22 are mounted on the LED mounter plate 37. The translucent polycarbonate LED lamp cover 38 is formed in a substantially cylindrical shape in cross section, and the locking pieces 39, 39 at both ends thereof are locked to the locking portions 40, 40 at both ends of the heat sink 34, whereby the entire fluorescent lamp is formed in a perfect circular cross section.

Since the average outer diameter of the conventional fluorescent lamp is 32.5mm, the outer shape of the LED lighting device 10 of the present invention is preferably not more than 32.5mm in order to be mounted on the conventional fluorescent lamp mounting device. On the other hand, since a large-capacity lithium ion battery that is preferably used as the battery 19 has a diameter of about 15mm in the smallest battery manufactured at present, the heat sink 34 may not be able to completely house the battery 19 when the heat sink 34 and the LED lamp cover 38 are both divided into semicircular (180 degrees) shapes. On the other hand, when the heat sink 34 is formed in a shape exceeding a semicircle, the LED cover 38 becomes relatively small, and thus it is difficult to spread the light emitted from the LED22 at a wide angle. Therefore, in the preferred globe structure shown in fig. 14, the following structure is adopted: the heat sink 34 and the LED lamp housing 38 are connected in a semicircular manner at the outer periphery, and the flat plate portion 35 of the heat sink 34 is disposed so as to be displaced beyond the semicircle to the LED lamp housing 38, thereby making the storage space for the battery 19 larger. Since the semicircular area is secured in the outer peripheral LED cover 38, and the reflection of the high reflection sheet 36 is added, it is possible to diffuse the light to a wide angle of 270 ° at maximum by efficiently diffusing and reflecting the light emitted from the LED 22. Further, since the heat sink 34 and the LED cover 38 are both seen to have a semi-cylindrical shape in appearance, there is no sense of incongruity in appearance.

Description of the symbols

10 fluorescent lamp type LED lighting device

11 lampshade

12 socket part

12a and 12b pins

13 first power supply circuit

14 switch controller (control part)

15 LED drive circuit

16 rectifier

17 Voltage transformer

18 electrolytic capacitor

19 cell

20 second power supply circuit

21 charging controller (control part)

22 LED

23 communication control chip

24 AC-DC converter

25 internal IC switch (control part)

26 distribution board in facility

27 external switch

28 disconnection sensor

29. AC wire for 30 normal light lamp

31 emergency lamp and charging ac line

32 socket

32a, 32b socket

33 IC chip (judging part and control part)

34 radiator

35 flat plate part

36 high reflection sheet

37 LED mounting machine plate

38 LED lampshade

39 locking piece

40 locking part

Claims (3)

1. A fluorescent lamp type LED lighting device which can be mounted between a pair of sockets provided for fluorescent lamps, comprising:

a first power supply circuit for converting and rectifying the AC power supplied from the socket to obtain DC power to make the LED emit light;

a second power supply circuit for lighting the LED by using a built-in battery;

a controller that switches a first lighting mode for charging a battery while lighting the LED at a first predetermined lighting intensity by the first power supply circuit and a second lighting mode for lighting the LED at a second predetermined lighting intensity lower than the first predetermined lighting intensity by the second power supply circuit, according to a predetermined condition in a normal state where the lighting is turned ON by the lighting switch ON, and controls the second power supply circuit to light the LED in an emergency where no ac power is supplied;

the controller controls the first lighting mode to be switched to the second lighting mode when the remaining battery capacity reaches a predetermined upper threshold value, and controls the second lighting mode to be switched to the first lighting mode when the remaining battery capacity reaches a lower threshold value;

the controller performs sequential dimming control so that the brightness at the time of lighting the battery gradually decreases from the brightness at the time of lighting the normal power supply to the upper limit threshold value when the battery remaining capacity increases to the value of the upper limit threshold value, and so that the brightness at the time of lighting the battery gradually coincides with the brightness at the time of lighting the battery when the battery remaining capacity decreases to the value of the lower limit threshold value, in the operation in the first lighting mode, and performs sequential dimming control so that the brightness at the time of lighting the battery gradually increases from the brightness at the time of lighting the power supply to the lower limit threshold value when the battery remaining capacity decreases to the value of the lower limit threshold value, and so that the brightness at the time of lighting the normal power supply coincides with the brightness at the time of lighting the second lighting mode.

2. The fluorescent lamp type LED illumination device according to claim 1, characterized in that:

the controller receives a signal from a charge controller that continuously monitors the remaining battery capacity to determine whether the remaining battery capacity reaches an upper threshold or a lower threshold.

3. The fluorescent lamp type LED illumination device according to claim 1 or 2, characterized in that:

the controller performs sequential dimming control or sequential dimming control by increasing or decreasing the voltage or current value of the battery for a certain period of time.