WO2015079618A1

WO2015079618A1 - Illumination device

Info

Publication number: WO2015079618A1
Application number: PCT/JP2014/005316
Authority: WO
Inventors: 圭一郎奥浦; 佐々木　工輔; 勇錦蘇
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2013-11-29
Filing date: 2014-10-20
Publication date: 2015-06-04
Also published as: TW201534179A; JP6241730B2; JP2015106509A; TWI612845B

Abstract

Provided is an illumination device in which usability as a hand-held light is improved. This illumination device (1) comprises a light guide plate (13) that guides light emitted from LEDs (5a, 5b), and emits the light from an emission surface to the outside. The emission surface of the light guide plate (13) has an area that is greater than or equal to half the area of the front surface of a device body (2). When the surrounding brightness detected by a brightness sensor (3a) becomes darker than a predetermined value, a control circuit controls a lighting circuit so as to light up the LED (5a) with power supplied from a commercial power supply. When a lighting operation is performed by using a lighting switch (8), the control circuit controls the lighting circuit so as to light up the LED (5b) with power supplied from a battery. The control circuit controls the lighting circuit such that the color temperature of the LED (5b), which is lit up by power supplied from the battery, is higher than the color temperature of the LED (5a), which is lit up by power supplied from the commercial power supply.

Description

lighting equipment

The present invention generally relates to a lighting fixture, and more particularly to a night light that is plugged into a commercial power outlet and illuminates the floor of a passageway.

Conventionally, there has been a foot lamp that is inserted into an outlet on the wall surface of the passage and detects the darkness of the surroundings and the passage of people to illuminate the foot of the passage (for example, see Japanese Utility Model Registration No. 3108623; "). The footlamp described in Document 1 includes a primary battery, and can be used as a portable light that is removed from an outlet and uses the primary battery as a power source.

The footlight described in Document 1 can be removed from the outlet and used as a portable light. However, since it is a footlight that illuminates the floor, the illumination area is narrow and the usability as a portable light is poor. Moreover, since the foot lamp generally employs a light bulb colored light to make it difficult to feel the light of the foot lamp dazzlingly, it is not easy to use as a portable electric light.

This invention is made in view of the said subject, and it aims at providing the lighting fixture which improved the usability of the handy light.

In order to solve the above problems, a lighting fixture of the present invention includes a plug, a lighting circuit for lighting a lighting load, an operation unit, a light guide plate, an illuminance conversion unit, a control unit, and a body, It is characterized as follows. The plug is detachably connected to a commercial power outlet. The operation unit is operated to turn on or off the illumination load. The light guide plate guides the radiated light of the illumination load incident on the incident surface and radiates the light from the output surface to the outside. The illuminance conversion unit changes the output magnitude according to ambient brightness. When the brightness (ambient brightness) obtained from the output of the illuminance conversion unit becomes darker than a predetermined value, the control unit turns on the illumination load with power supplied from the outlet via the plug. The lighting circuit is controlled. When the lighting operation is performed using the operation unit, the control unit controls the lighting circuit so that the lighting load is turned on by electric power supplied from a battery. The container includes the plug, the lighting circuit, the operation unit, the light guide plate, the illuminance conversion unit, and the control unit, and exposes the emission surface of the light guide plate from one surface. The exit surface of the light guide plate has an area that is more than half of the one surface. The control unit controls the lighting circuit so that a color temperature of the lighting load that is lit by power supplied from the battery is higher than a color temperature of the lighting load that is lit by power supplied from the commercial power source. Configured to control.

It is a front view explaining the principal part of the lighting fixture which concerns on embodiment. It is a right sectional view explaining the important section of the lighting fixture concerning an embodiment. It is a top view of the lighting fixture which concerns on embodiment. It is a left view of the lighting fixture which concerns on embodiment. It is a front view of the lighting fixture which concerns on embodiment. It is a disassembled perspective view explaining the principal part of the lighting fixture which concerns on embodiment. It is a schematic circuit block diagram of the lighting fixture which concerns on embodiment.

Hereinafter, the lighting apparatus of the present embodiment will be described with reference to the drawings. In the following description, the x-axis direction shown in FIG. 1 is defined as the left-right direction, and the y-axis direction is defined as the up-down direction. Further, the description will be made assuming that the z-axis direction shown in FIG.

The lighting apparatus of the present embodiment is connected to an outlet provided on a wall surface, for example, and is used as a foot lamp that illuminates the floor surface when the surroundings become dark. The luminaire includes a battery, and can be used as a handy light (portable light) that is removed from an outlet and uses the battery as a power source.

As shown in FIG. 7, the lighting fixture 1 of the present embodiment includes a lighting circuit 6, LEDs (Light Emitting Diodes) 5 a and 5 b (lighting load), an LED 9 a (lighting unit 9), and a control circuit 7 (control unit). ) And a battery 12. Further, the lighting fixture 1 includes a power supply circuit 18, a power failure detection circuit 11, and a voltage measurement circuit 14.

The power failure detection circuit 11, the voltage measurement circuit 14, the lighting circuit 6, the control circuit 7, and the power supply circuit 18 are each mounted on a main board 10 to be described later.

The power supply circuit 18 is composed of, for example, a buck converter type switching power supply (not shown), and converts an AC voltage input to the primary side into a predetermined DC voltage and outputs it to the secondary side. The primary side of the power supply circuit 18 is electrically connected to the plug 4 (see FIG. 4). The power supply circuit 18 is supplied with power from the commercial power supply 17 when the plug 4 is inserted into an outlet (not shown) of the commercial power supply 17. The lighting circuit 6 is connected to the secondary side of the power supply circuit 18. The power supply circuit 18 is not limited to a switching power supply, and may have an appropriate configuration that can convert an AC voltage input to the primary side into a predetermined DC voltage and output it to the secondary side. Good.

The power failure detection circuit 11 detects whether power is supplied from the commercial power supply 17 by monitoring the voltage input to the primary side of the power supply circuit 18. The power failure detection circuit 11 outputs a signal SN1 to the control circuit 7 when power is supplied from the commercial power supply 17.

The lighting circuit 6 includes a regulator 15, a booster circuit 16, and switches SW1 to SW3. A DC voltage is input to the regulator 15 from either the power supply circuit 18 or the booster circuit 16. The regulator 15 suppresses the fluctuation of the input voltage and outputs it to the control circuit 7 and the

LEDs

5a, 5b, 9a. A diode (not shown) for preventing a backflow of current is connected between the regulator 15 and the power supply circuit 18 and between the regulator 15 and the booster circuit 16, respectively.

The lighting circuit 6 is connected to

LEDs

5a and 5b for illumination and an LED 9a provided for notifying a decrease in the remaining capacity of the battery 12. The LED 5a is connected to the regulator 15 via the switch SW1. Similarly, the LED 5b is connected to the regulator 15 via the switch SW2, and the LED 9a is connected to the regulator 15 via the switch SW3. The switches SW1 to SW3 are turned on / off by the control circuit 7, respectively.

The booster circuit 16 is composed of, for example, a boost chopper circuit, and boosts the voltage of the battery 12 and outputs the boosted voltage to the regulator 15. The operation of the booster circuit 16 is controlled by a signal SN2 input from the control circuit 7.

The battery 12 is an AA type primary battery such as a manganese dry battery or an alkaline / manganese dry battery, and is connected to the primary side of the booster circuit 16.

The luminaire 1 includes a voltage measurement circuit 14 that measures the output voltage of the battery 12. The voltage measurement circuit 14 performs A / D conversion on the voltage of the battery 12 every predetermined period and outputs it to the control circuit 7.

The control circuit 7 includes, for example, a microcomputer, and the lighting circuit 6 can be controlled by executing a built-in program. A DC voltage is input from the regulator 15 to the power supply terminal VDD of the control circuit 7.

The control circuit 7 is connected with a changeover switch 31, a lighting switch 8 (operation unit), and a brightness sensor 3a (illuminance conversion unit).

The brightness sensor 3a is composed of an element (for example, a photodiode, a phototransistor, etc.) that detects ambient brightness. The output current of the brightness sensor 3a changes according to the surrounding brightness.

The changeover switch 31 is a slide switch that is movable in the left-right direction, and is a switch for switching whether to enable the night light function. When the changeover switch 31 is set to enable the night light function and the ambient brightness obtained from the output current of the brightness sensor 3a becomes darker than a predetermined value, the control circuit 7 turns on the switch SW1. The LED 5a is turned on. When the changeover switch 31 is set to enable the night light function and the ambient brightness obtained from the output current of the brightness sensor 3a becomes brighter than a predetermined value, the control circuit 7 turns off the switch SW1. Then, the LED 5a is turned off. In addition, you may provide a hysteresis in the threshold value (above predetermined value) which switches on / off of LED5a. By providing hysteresis in the threshold value, it is possible to suppress the lighting and extinguishing of the LED 5a from being repeated in a short cycle when the ambient brightness changes and approaches a predetermined value.

On the other hand, in a state where the changeover switch 31 is set so as to disable the night light function, even if the ambient brightness obtained from the output current of the brightness sensor 3a becomes darker than a predetermined value, the control circuit 7 Continue to keep SW1 off.

Next, the structure of the lighting fixture 1 will be described with reference to FIGS.

As shown in FIGS. 4 and 5, the container body 2 includes a rectangular box-shaped body 22 having an opening on the front surface side, and a cover 21 having a front surface formed in a rectangular shape and covering the opening on the front surface of the body 22.

In the upper part of the front surface of the cover 21, an overhanging portion 21 a that protrudes to the front side of the lower part of the cover 21 is formed. An opening 21c that opens in a rectangular shape is provided on the front surface portion of the cover 21 excluding the protruding portion 21a, and the light guide plate 13 is attached to the cover 21 so as to close the opening 21c.

The light guide plate 13 includes a light extraction portion 13a (outgoing surface) having a rectangular front surface and a light incident portion 13b (incident surface) (see FIG. 2) formed so as to protrude upward from the upper surface of the light extraction portion 13a. ing. The light incident part 13b is disposed inside the projecting part 21a, and is disposed such that the incident surface (upper side surface in the present embodiment) of the light incident part 13b faces each of the

LEDs

5a and 5b. The light incident part 13b guides the light emitted from the

LEDs

5a and 5b to the incident surface of the light incident part 13b to the light extraction part 13a. The front surface of the light extraction portion 13a is formed to be flush with the front surface of the overhang portion 21a, and is exposed to the outside from the opening portion 21c. A light diffusing unit 19 for diffusing light passing through the light extracting unit 13a is provided on the back surface of the light extracting unit 13a, and the light diffused by the light diffusing unit 19 is radiated to the outside from the front surface of the light extracting unit 13a. .

As shown in FIGS. 1 and 2, a sub-board 51 is arranged inside the overhanging portion 21a. The sub board 51 is attached near the upper surface inside the container body 2 so as to be parallel to the upper surface of the container body 2, and is electrically connected to the main board 10.

The sub-board 51 is mounted with

LEDs

5a and 5b for illumination, LED 9a for notification, brightness sensor 3a, and changeover switch 31. The LED 9a is mounted on one end side (left side in the present embodiment) of the upper surface of the sub-board 51. The brightness sensor 3a is mounted on the other end side (right side in the present embodiment) of the upper surface of the sub-board 51. The changeover switch 31 is mounted at the center of the upper surface of the sub-board 51, and the

LEDs

5 a and 5 b are mounted on the lower surface of the sub-board 51, respectively. The LED 5a emits light when used as a night light, and the color temperature of the light emission color of the LED 5a is a light bulb color of about 2700 to 3000K. The LED 5b emits light when used as a handy light, and the color temperature of the light emission color of the LED 5b is about 4000K white.

As shown in FIG. 3, holes 21 b are provided on the upper surface of the container body 2 so as to expose the

translucent windows

3 b and 9 b and the switching knob 32 covered on the operation portion of the selector switch 31.

The translucent window 9b is formed of a translucent material such as acrylic resin, for example, and is provided in a portion facing the LED 9a on the upper surface of the cover 21 and exposed above the body 2. When the LED 9a is turned on, the light of the LED 9a is transmitted through the transparent window 9b and radiated from the upper surface of the cover 21 to the outside. Therefore, when the remaining capacity of the battery 12 is reduced and the LED 9a is turned on with the plug 4 connected to the outlet, the light of the LED 9a is emitted from the light transmitting window 9b. In this embodiment, the lighting part 9 is comprised by LED9a and the translucent window 9b.

The translucent window 3b is formed of a translucent material such as acrylic resin, for example, is provided at a portion facing the brightness sensor 3a on the upper surface of the cover 21, and is exposed on the upper side of the body 2. When light around the body 2 passes through the transparent window 3b and enters the brightness sensor 3a, the output current of the brightness sensor 3a changes according to the ambient brightness.

The change knob 32 is provided so as to be exposed to the outside through the hole 21b on the upper surface of the container body 2 in a state where the operation portion of the changeover switch 31 is covered. The selector switch 31 is switched by sliding the selector knob 32 in the left-right direction. When the switching knob 32 is set to one end side in the sliding direction (right side in FIG. 3 in this embodiment), the night light function is enabled, and the switching knob 32 is set to the other end side in the sliding direction (in FIG. 3 in this embodiment). If set to the left side of), the night light function is disabled.

On one side surface of the container body 2 in the left-right direction (in this embodiment, the left side surface of the container body 2), a lighting switch 8 is provided. The lighting switch 8 is a switch for turning on / off the LED 5b in a state where power is not supplied from the commercial power source 17. The lighting switch 8 is constituted by a push switch, for example. The control circuit 7 switches on / off of the LED 5b each time the lighting switch 8 is pressed in a state where power is not supplied from the commercial power source 17. The lighting switch 8 is not limited to a push switch, and may be an appropriate type of switch that maintains the state after switching.

The plug 4 is attached to the back of the body 22. As shown in FIG. 4, the plug 4 is rotatably supported between a position where the tip end portion of the plug 4 faces the back direction of the body 22 and a position which faces the upper surface direction. When the plug 4 is rotated in the direction of the arrow A1 in FIG. 4 with the plug 4 being pulled out from the outlet (not shown) of the commercial power supply 17 so that the tip of the plug 4 faces the top surface, the body 22 is provided. The plug 4 can be stored in the groove 41.

As shown in FIG. 6, an accommodation recess 23 a for accommodating the battery 12 is provided on the lower side of the back surface of the container body 2. The housing recess 23 a is closed by a lid 23 b that is detachably attached to the body 22. The battery 12 is a readily available primary battery, and is housed in the housing recess 23 a so that the longitudinal direction of the battery 12 is along the left-right direction of the container 2.

As shown in FIG. 2, the main board 10 is accommodated inside the container body 2. Circuit components constituting the lighting circuit 6, the control circuit 7, the power supply circuit 18, the power failure detection circuit 11, and the voltage measurement circuit 14 are mounted on the main board 10. The main board 10 is electrically connected to the sub board 51, the battery 12, and the plug 4, respectively.

Here, operation | movement of the lighting fixture 1 of this embodiment is demonstrated.

First, the operation when the switching knob 32 is switched to the position for enabling the night light function will be described.

The container 2 is attached to a wall surface (not shown) in a state where the plug 4 is connected to an outlet (not shown) of the commercial power source 17. The power supply circuit 18 converts the AC voltage supplied from the commercial power supply 17 into a predetermined DC voltage and outputs it to the lighting circuit 6. The power failure detection circuit 11 monitors the voltage input to the primary side of the power supply circuit 18 and outputs a signal SN1 to the control circuit 7 when power is supplied from the commercial power supply 17. When the signal SN1 is input, the control circuit 7 stops the boosting operation of the boosting circuit 16. Each of the control circuit 7 and the lighting circuit 6 operates with electric power supplied from the commercial power supply 17.

If the ambient brightness obtained from the output current of the brightness sensor 3a becomes darker than a predetermined value while power is supplied from the commercial power supply 17, the control circuit 7 turns on the switch SW1 to automatically turn on the LED 5a. Turn on. The light emitted from the LED 5a to the light incident portion 13b is diffused by the light diffusing portion 19 and emitted from the light extraction portion 13a to the outside. The light emitted from the light extraction portion 13a of the light guide plate 13 illuminates the floor surface (not shown) around the luminaire 1. Since the emission color of the LED 5a is a light bulb color, it is difficult to feel dazzling even if the floor surface is illuminated at night. On the other hand, when the ambient brightness obtained from the output current of the brightness sensor 3a becomes brighter than a predetermined value while power is supplied from the commercial power supply 17, the control circuit 7 turns off the switch SW1 and turns on the LED 5a. Turn off automatically.

When the changeover switch 31 is switched to the position where the night light function is disabled, the control circuit 7 sets the switch SW1 even if the ambient brightness obtained from the output current of the brightness sensor 3a becomes darker than a predetermined value. The off state is maintained, and the LED 5a is kept off.

Next, the operation of the lighting fixture 1 when operating with the power supplied by the battery 12 will be described.

When the plug 4 is pulled out from the outlet (not shown) of the commercial power supply 17 or when a power failure occurs, the power failure detection circuit 11 stops outputting the signal SN1. When power is not supplied from the plug 4, a switching circuit (not shown) switches the power source from the commercial power source 17 to the battery 12 and supplies the control circuit 7 with the power of the battery 12. When the signal SN1 is no longer input from the power failure detection circuit 11, the control circuit 7 causes the booster circuit 16 to perform a boost operation and causes the booster circuit 16 to output a predetermined DC voltage to the regulator 15. That is, the control circuit 7 and the lighting circuit 6 operate with electric power supplied from the battery 12.

The control circuit 7 operates the booster circuit 16 and then turns on the switch SW2 to light the LED 5b. Therefore, when a power failure occurs with the lighting fixture 1 connected to the outlet, the LED 5b is automatically turned on, and the light emitted from the light extraction portion 13a of the light guide plate 13 is irradiated in the irradiation direction. Since the light emission color of the LED 5b is white, when the lighting fixture 1 is used as a handy light, the visibility is improved and the surrounding situation is more easily recognized.

When the lighting switch 8 is turned off while the LED 5b is lit with the power supplied from the battery 12, the control circuit 7 turns off the switch SW2 to turn off the LED 5b. Similarly, when the lighting switch 8 is turned on while operating with the power supplied from the battery 12, the control circuit 7 turns on the switch SW2 to light the LED 5b and extract the light from the light guide plate 13. Light is emitted from the portion 13a.

By the way, even if the control circuit 7 and the lighting circuit 6 are each operated with power supplied from the commercial power supply 17, the remaining capacity of the battery 12 gradually decreases due to, for example, natural discharge. When the voltage value of the battery 12 output from the voltage measurement circuit 14 falls below a predetermined voltage value, the control circuit 7 determines that the remaining capacity of the battery 12 has fallen below a predetermined capacity that is a notification level, and turns on the switch SW3. The LED 9a is turned on. When the LED 9a is turned on, the light of the LED 9a is transmitted through the light transmission window 9b and radiated to the outside from the upper side of the body 2. Since the user can easily recognize the light of the LED 9a when viewed from the upper side of the container body 2, the user can easily recognize the decrease in the remaining capacity of the battery, and can grasp that the battery 12 of the built-in battery 12 needs to be replaced. .

Even when the luminaire 1 operates with power supplied from the battery 12, the control circuit 7 may light the LED 9a when the output voltage of the battery 12 falls below a predetermined voltage. In order to turn on the LED 9a while further reducing the power consumption of the battery 12, the control circuit 7 may turn on the LED 9a for a predetermined period and turn off the LED 9a, or blink the LED 9a at a predetermined cycle, for example.

As described above, the luminaire 1 of the present embodiment includes the plug 4, the lighting circuit 6, the lighting switch 8 (operation unit), the light guide plate 13, the brightness sensor 3a (illuminance conversion unit), and the control. A circuit 7 (control unit) and a container 2 are provided. The plug 4 is detachably connected to the outlet of the commercial power source 17. The lighting circuit 6 lights the illumination load (

LEDs

5a and 5b in this embodiment). The lighting switch 8 (operation unit) is operated to turn on or off the lighting load (LED 5b in the present embodiment). The light guide plate 13 guides the radiated light of the illumination load (

LEDs

5a and 5b) incident on the incident surface (the upper side surface of the light incident portion 13b) and radiates the light from the emission surface (front surface of the light extraction portion 13a) to the outside. The brightness sensor 3a (illuminance conversion unit) changes the output magnitude (current value in the present embodiment) according to the ambient brightness. When the brightness (ambient brightness) obtained from the output of the brightness sensor 3a (illuminance conversion section) becomes darker than a predetermined value, the control circuit 7 (control section) supplies power supplied from the outlet via the plug 4 Then, the lighting circuit 6 is controlled so that the lighting load (LED 5a in the present embodiment) is turned on. When the lighting operation is performed using the lighting switch 8 (operation unit), the control circuit 7 (control unit) turns on the lighting load (LED 5b in the present embodiment) with the power supplied from the battery 12 so that the lighting circuit 6 is turned on. To control. The body 2 includes a plug 4, a lighting circuit 6, a lighting switch 8 (operation unit), a light guide plate 13, a brightness sensor 3 a (illuminance conversion unit), and a control circuit 7 (control unit). The exit surface (front surface of the light extraction portion 13a) is exposed from one surface (front surface in the present embodiment). The exit surface of the light guide plate 13 (the front surface of the light extraction portion 13a) has an area that is at least half that of one surface (the front surface of the body 2). The control circuit 7 is configured so that the color temperature of the lighting load (LED 5b) that is lit by the power supplied from the battery 12 is higher than the color temperature of the lighting load (LED 5a) that is lit by the power supplied from the commercial power source 17. The lighting circuit 6 is controlled.

The light guide plate 13 has an area that is more than half of one surface (front surface) of the container body 2 and is exposed on the one surface (front surface) of the container body 2 to illuminate the surroundings of the lighting device 1, so that the lighting device 1 is used as a handy light. When used, it can illuminate a wider area. Moreover, since the color temperature of the emitted light when using it as a handy light is high compared with the color temperature of the emitted light when using the lighting fixture 1 as a nightlight, visibility improves and it is easy to use as a handy light.

In the luminaire 1, the radiated light of the lighting load (in this embodiment, the LED 5a) when power is supplied from the commercial power supply 17 is a light bulb color, and the lighting load when power is supplied from the battery 12 (this embodiment) In form, it is also preferred that the emitted light of the LED 5b) is white. When the luminaire 1 is used as a handy light, the white radiated light emitted from the light guide plate 13 illuminates a wider range, thereby improving visibility. When the lighting fixture 1 is used as a night light, light bulb-colored radiated light is emitted from the light guide plate 13, so that it is difficult to feel dazzling even when the floor surface is illuminated at night.

The control circuit 7 in the present embodiment controls the switch SW2 so that the LED 5b is lit with the power supplied from the battery 12, and controls the switch SW1 so that the LED 5a is lit with the power supplied from the commercial power source 17. Realizes two synchrotron radiations with different color temperatures.

Although the illumination load in this embodiment is composed of two

LEDs

5a and 5b, the number of LEDs is not limited to two, and any one LED can be used as long as it can emit two radiated lights having different color temperatures. Three or more may be sufficient. Moreover, the kind of illumination load is not limited to LED, The appropriate structure which can each radiate | emit two emitted light from which color temperature differs may be sufficient. Furthermore, the method of switching between two radiated lights having different color temperatures is not limited to turning on / off the illumination load switch, and may be an appropriate switching method.

In recent years, the performance of primary batteries has been improved and long-life primary batteries have been commercialized. Therefore, in the lighting fixture 1 of this embodiment, primary batteries that are more readily available than secondary batteries are used for the batteries 12. ing. However, since the battery 12, which is a primary battery, cannot be charged, the remaining capacity of the battery 12 gradually decreases due to natural discharge or the like. Therefore, the user may not be aware that the remaining capacity of the battery 12 is reduced, and there is a possibility that the lighting fixture 1 cannot be used sufficiently when the lighting fixture 1 is used as a handy light. Since the lighting fixture 1 of this embodiment lights the lighting part 9 and alert | reports the fall of the remaining capacity of the battery 12, it becomes easy for a user to recognize the fall of the remaining capacity of the battery 12. FIG.

Although the lighting part 9 in this embodiment is comprised by LED9a and the translucent window 9b, what is necessary is just the structure from which light is radiated | emitted from the upper side of the container 2, for example, the bullet-type LED mounted in the sub board | substrate 51 May be exposed on the upper side of the body 2.

The brightness sensor 3a in the present embodiment is composed of an element whose current value changes according to the illuminance, but may be a photoresistor whose resistance value changes according to the illuminance, for example.

The battery 12 in the present embodiment is an AA type primary battery, but may be a type other than the AA type or a charged secondary battery (for example, a nickel-hydrogen rechargeable battery).

The voltage measurement circuit 14 in this embodiment measures the output voltage in order to detect the remaining capacity of the battery 12, but is not limited to the measurement of the output voltage, and may be an appropriate method that can detect the remaining capacity of the battery. .

In the above description, the lighting fixture 1 is provided with two

LEDs

5a and 5b, and the example in which the LED 5a or the LED 5b is turned on according to the type of power supply that supplies power to the lighting fixture 1 has been described. That is, in the luminaire 1 of the present embodiment, the illumination load includes the LED 5a (first illumination load) that emits light at the first color temperature and the LED 5b (first illumination) that emits light at the second color temperature higher than the first color temperature. 2 lighting loads). The control circuit 7 (control unit) turns on the LED 5a (first lighting load) when power is supplied from the commercial power supply 17, and turns on the LED 5b (second lighting load) when power is supplied from the battery 12. The lighting circuit 6 is controlled so that

In addition, the lighting fixture 1 may be comprised so that both LED5a and LED5b may be lighted. Below, the modification of the lighting fixture 1 comprised so that both LED5a and LED5b may be lighted is demonstrated.

In the lighting fixture 1 of the modified example 1, the illumination load includes an LED 5a that emits light at a first color temperature (first illumination load) and an LED 5b that emits light at a second color temperature higher than the first color temperature (second illumination). Lighting load). The control circuit 7 (control unit) turns on the LED 5a (first illumination load) and the LED 5b (second illumination load) when power is supplied from the commercial power supply 17, and when power is supplied from the battery 12. The lighting circuit 6 is controlled to turn on the LED 5b (second illumination load). When power is supplied from a commercial power source, the lighting device 1 of the first modification illuminates the area around the foot wider than the lighting device 1 of the present embodiment by lighting both the two

LEDs

5a and 5b. Can do. Further, by turning on both the LED 5a whose light emission color is a light bulb color and the LED 5b whose light emission color is white, and making the color temperature of the light emission color of the lighting fixture 1 higher than that of the lighting fixture 1 of the present embodiment, Even if it exists, it can make it easy to recognize the surroundings. In addition, when the lighting apparatus 1 of the first modification is operated with the power of the battery 12 and used as a handy light, only the LED 5b whose emission color is white is turned on, so that both the

LEDs

5a and 5b are turned on. Power consumption can be reduced. Moreover, it is also preferable that the light emission color of the LED 5b is white that allows the surroundings to be easily recognized.

In the lighting fixture 1 of the modified example 2, the illumination load includes an LED 5a that emits light at a first color temperature (first illumination load) and an LED 5b that emits light at a second color temperature higher than the first color temperature (second illumination). Lighting load). The control circuit 7 (control unit) turns on the LED 5a (first lighting load) when power is supplied from the commercial power supply 17, and the LED 5b (second lighting load) and LED 5b when power is supplied from the battery 12. The lighting circuit 6 is controlled so as to light (second lighting load). The lighting fixture 1 of the modification 2 illuminates the surroundings with a light bulb color as a foot lamp operating with electric power supplied from the commercial power supply 17. On the other hand, since the two

LEDs

5a and 5b are both turned on as a handy light that operates with electric power supplied from the battery 12, a wider range than the handy light of the first modification can be illuminated brightly.

The color temperature of the emission color (radiated light) of the LED 5a (first illumination load) in the modified examples 1 and 2 is preferably a light bulb color of about 2700 to 3000K, and the emission color (radiated light) of the LED 5b (second illumination load). The color temperature is preferably white at about 4000K.

Claims

A plug that is detachably connected to a commercial power outlet,
A lighting circuit for lighting the lighting load;
An operation unit operated to turn on or off the illumination load;
A light guide plate that guides the emitted light of the illumination load incident on the incident surface and radiates the light from the output surface to the outside;
An illuminance converter that changes the output size according to the ambient brightness;
When the brightness obtained from the output of the illuminance conversion unit becomes darker than a predetermined value, the lighting circuit is controlled to turn on the lighting load with power supplied from the outlet via the plug, and the operation unit A control unit that controls the lighting circuit so that the lighting load is turned on with power supplied from a battery when a lighting operation is performed using
Comprising the plug, the lighting circuit, the operation unit, the light guide plate, the illuminance conversion unit, and the control unit, and a device body that exposes the exit surface of the light guide plate from one surface,
The exit surface of the light guide plate has an area of more than half of the one surface,
The controller controls the lighting circuit so that a color temperature of the lighting load when power is supplied from the battery is higher than a color temperature of the lighting load when power is supplied from the commercial power source. Lighting equipment characterized by controlling.
The emitted light of the lighting load when power is supplied from the commercial power source is a light bulb color,
The illuminating device according to claim 1, wherein emitted light of the illumination load when electric power is supplied from the battery is white.
The lighting load includes a first lighting load that emits light at a first color temperature, and a second lighting load that emits light at a second color temperature higher than the first color temperature,
The controller controls the lighting circuit to turn on the first lighting load when power is supplied from the commercial power source and to turn on the second lighting load when power is supplied from the battery. The lighting apparatus according to claim 1, wherein:
The lighting load includes a first lighting load that emits light at a first color temperature, and a second lighting load that emits light at a second color temperature higher than the first color temperature,
The controller turns on the first lighting load and the second lighting load when power is supplied from the commercial power source, and turns on the second lighting load when power is supplied from the battery. The lighting device according to claim 1, wherein the lighting circuit is controlled as follows.
The lighting load includes a first lighting load that emits light at a first color temperature, and a second lighting load that emits light at a second color temperature higher than the first color temperature,
The controller turns on the first lighting load when power is supplied from the commercial power source, and turns on the first lighting load and the second lighting load when power is supplied from the battery. The lighting device according to claim 1, wherein the lighting circuit is controlled as follows.
The first color temperature is a color temperature of a light bulb;
The lighting apparatus according to any one of claims 3 to 5, wherein the second color temperature is a white color temperature.