TWI612845B - Luminaire - Google Patents

Abstract

The invention provides a luminaire which improves the practicability of a handheld light source. The lighting fixture (1) includes a light guide plate (13), and guides the radiated light of the LEDs (5a, 5b) to be radiated from the emission surface to the outside. The exit surface of the light guide plate (13) has an area of more than one-half of the front surface of the body (2). The control circuit, if the brightness detected by the brightness sensor (3a) is darker than the predetermined threshold, controls the lighting circuit to turn on the LED (5a) by the power supplied from a commercial power source. If the control circuit uses the lighting switch (8) for lighting operation, the lighting circuit is controlled to turn on the LED (5b) by the power supplied from the battery. The control circuit controls the lighting circuit so that the color temperature of the LED (5b) lit by power supplied from a battery is higher than the color temperature of the LED (5a) powered by power supplied from a commercial power source.

Description

Lighting appliances

The present invention generally relates to a lighting appliance, and more specifically, to a night light that is inserted into a socket of a commercial power source and illuminates the floor surface of a passage.

In the past, a socket inserted into the wall of a passage is known to detect the surrounding darkness or the passage of pedestrians and illuminate the foot height of the passage (for example, refer to Japanese Utility Model Registration No. 3108623, hereinafter referred to as "Document 1"). ). The foot lamp described in Document 1 includes a primary battery, which can be removed from the socket and the primary battery can be used as a power source for use as a portable electric lamp.

Although the foot lamp described in Document 1 can be removed from the socket and used as a portable electric lamp, since it is a foot lamp that illuminates the floor surface, the lighting range is narrow, and its practicality as a portable electric lamp is not good. In addition, in general, in order to make the light of the footlight difficult to make people feel dazzling, a bulb-colored light is used, so it is not practical as a portable electric lamp.

In view of the above-mentioned problems, an object of the present invention is to provide a lighting device that improves the practicability of a handheld light source.

In order to solve the above-mentioned problems, a lighting fixture of the present invention includes a plug, a lighting circuit for lighting a lighting load, an operation section, a light guide plate, an illuminance conversion section, a control section, and a device, and is characterized as follows. The plug is detachably connected to a socket of a commercial power source. The operation unit is operated to turn on or turn off the lighting load. The light guide plate guides the radiated light of the illuminating load incident on the incident surface so as to be radiated from the emission surface to the outside. The illuminance conversion unit changes the magnitude of the output in accordance with the surrounding brightness. The control unit controls the lighting circuit if the brightness (the surrounding brightness) obtained from the output of the illuminance conversion unit is darker than a predetermined threshold, and the lighting load point is supplied by the power supplied from the socket through the plug. light. When the control unit performs a lighting operation using the operation unit, the control unit controls the lighting circuit, and lights the lighting load with power supplied from a battery. The device body has the plug, the lighting circuit, the operation section, the light guide plate, the illuminance conversion section, and the control section, so that the exit surface of the light guide plate is exposed from one side. The exit surface of the light guide plate has an area of more than one-half of the one surface. The control unit is configured to control the lighting circuit so that the color temperature of the lighting load that is lit by power supplied from the battery is greater than the color temperature of the lighting load that is powered by power supplied from the commercial power source. high.

[Best Mode for Carrying Out the Invention]

Hereinafter, a lighting fixture according to this embodiment will be described with reference to the drawings. In the following description, the x-axis direction shown in FIG. 1 is defined as a left-right direction, and the y-axis direction is defined as a vertical direction. In addition, the z-axis direction (direction perpendicular to the paper surface in FIG. 1) shown in FIG. 2 will be described as front and rear.

The lighting fixture of this embodiment is connected to, for example, a socket provided on a wall surface, and is used as a foot light that illuminates the floor surface when the surroundings become dark. The lighting fixture is provided with a battery. The lighting fixture can be removed from the socket and used as a handheld light source (portable electric light) using a battery as a power source.

As shown in FIG. 7, the lighting device 1 of this embodiment includes a lighting circuit 6, LEDs (Light Emitting Diodes) 5 a and 5 b (lighting load), LED 9 a (lighting unit 9), and a control circuit 7 (Control section), and battery 12. Furthermore, 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 respectively mounted on a main substrate 10 described later.

The power supply circuit 18 is constituted by, for example, a step-down 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 (refer to FIG. 4). The power supply circuit 18 supplies power from the commercial power supply 17 by inserting the plug 4 into a socket (not shown) of the commercial power supply 17. The secondary side of the power supply circuit 18 is connected to the lighting circuit 6. The power supply circuit 18 is not limited to a switching power supply configuration, and may be a suitable configuration capable of converting an AC voltage input to the primary side into a predetermined DC voltage and outputting it to the secondary side.

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

The lighting circuit 6 includes a regulator 15, a booster circuit 16, and switches SW1 to SW3. A DC voltage is input from either the power supply circuit 18 or the booster circuit 16 to the regulator 15. The regulator 15 suppresses the fluctuation of the input voltage and outputs it to the control circuit 7 and the LEDs 5a, 5b, and 9a. Further, a diode (not shown) for preventing a reverse current flow is connected between the regulator 15 and the power supply circuit 18 and between the regulator 15 and the booster circuit 16, respectively.

To the lighting circuit 6, LEDs 5a and 5b for lighting and an LED 9a for notifying the remaining capacity of the battery 12 are connected. The LED 5a is connected to the regulator 15 via the switch SW1. Similarly, LED5b is connected to the regulator 15 via the switch SW2, and LED9a is connected to the regulator 15 via the switch SW3. The switches SW1 to SW3 are each turned on / off by the control circuit 7.

The booster circuit 16 is configured by, for example, a booster chopper circuit or the like, and boosts the voltage of the battery 12 to output 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, for example, an AA-type primary battery such as a manganese battery or an alkaline manganese battery, and is connected to the primary side of the booster circuit 16.

The lighting fixture 1 includes a voltage measurement circuit 14 that measures an output voltage of the battery 12. The voltage measurement circuit 14 A / D converts the voltage of the battery 12 in each predetermined period and outputs it to the control circuit 7.

The control circuit 7 includes, for example, a microcomputer, and realizes control of the lighting circuit 6 by executing a built-in program. The self-regulator 15 inputs a DC voltage to a power supply terminal VDD of the control circuit 7.

The control circuit 7 is connected to a changeover switch 31, a lighting switch 8 (operation section), and a brightness sensor 3a (illumination conversion section).

The brightness sensor 3a is constituted by an element (such as a photodiode, a photo-electric crystal, etc.) that detects the brightness of the surroundings. The output current of the brightness sensor 3a changes according to the surrounding brightness.

The switch 31 is a slide switch that can be arbitrarily moved in the left and right directions, and is used to switch the function of the night light on or off. In the state that the switch 31 is set to enable the night light function, if the surrounding brightness obtained from the output current of the brightness sensor 3a is darker than a predetermined value, the control circuit 7 turns on the switch SW1 to turn on the LED 5a Light up. In the state that the switch 31 is set to enable the night light function, if the surrounding brightness obtained from the output current of the brightness sensor 3a is brighter than a predetermined value, the control circuit 7 turns off the switch SW1 to turn the LED 5a Off. In addition, the threshold value for switching on / off of the LED 5a (the above-mentioned predetermined threshold) may be set with a hysteresis. By setting the threshold value with a hysteresis, it is possible to suppress the surrounding brightness change, and when the LED 5a is repeatedly turned on and off in a short period when it is close to the predetermined threshold.

On the other hand, when the switch 31 is set to disable the night light function, the control circuit 7 continues to maintain the switch SW1 even if the surrounding brightness obtained from the output current of the brightness sensor 3a is darker than the predetermined value. OFF state.

Next, the structure of the lighting fixture 1 will be described with reference to FIGS. 1 to 6.

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 body 21 having a rectangular front surface and covering the opening on the front surface of the body 22.

On the upper portion of the front surface of the cover body 21, a protruding portion 21 a is formed to protrude more forward than the lower portion of the cover body 21. An opening portion 21c having a rectangular opening is provided on a front surface portion of the cover body 21 except for the protruding portion 21a, and the light guide plate 13 is attached to the cover body 21 so as to close the opening portion 21c.

The light guide plate 13 includes a light extraction portion 13 a (exit surface) having a rectangular front surface, and a light incidence portion 13 b (incident surface) formed so as to protrude upward from a top surface of the light extraction portion 13 a (see FIG. 2). The light incident portion 13b is disposed inside the protruding portion 21a, and the incident surface (upper side in this embodiment) of the light incident portion 13b is disposed to face the LEDs 5a and 5b, respectively. The light incident portion 13b guides the light radiated from the LEDs 5a and 5b toward the incident surface of the light incident portion 13b toward the light extraction portion 13a. The front surface of the light extraction portion 13a is formed to be the same surface as the front surface of the protruding portion 21a, and is exposed to the outside from the opening portion 21c. A light diffusing section 19 is provided on the back surface of the light extracting section 13a to diffuse the light passing through the light extracting section 13a. The light diffused by the light diffusing section 19 is radiated from the front surface of the light extracting section 13a to the outside.

As shown in FIGS. 1 and 2, a sub substrate 51 is arranged inside the protruding portion 21 a. The sub substrate 51 is mounted near the top surface inside the device body 2 so as to be parallel to the top surface of the device body 2, and is electrically connected to the main substrate 10.

On the sub substrate 51, LEDs 5a and 5b for lighting, LEDs 9a for notification, a brightness sensor 3a, and a switch 31 are mounted. The LED 9 a is mounted on one end side (the left side in the present embodiment) of the top surface of the sub substrate 51. The brightness sensor 3 a is mounted on the other end side (the right side in this embodiment) of the top surface of the sub substrate 51. The changeover switch 31 is mounted on the center of the top surface of the sub substrate 51, and the LEDs 5 a and 5 b are respectively mounted on the lower surface of the sub substrate 51. The LED 5a emits light when used as a night light, and the color temperature of the light emitting color of the LED 5a is a bulb color of about 2700 to 3000K. The LED 5b emits light when used as a hand-held light source, and the color temperature of the light emitting color of the LED 5b is white at about 4000K.

On the top surface of the device body 2, as shown in FIG. 3, translucent windows 3b, 9b, and a hole 21b for exposing the switch knob 32 covered by the operation portion of the switch 31 are provided.

The light-transmitting window 9b is made of, for example, a light-transmitting material such as an acrylic resin, and is provided on the top surface of the cover 21 at a position facing the LED 9a and exposed on the upper side of the device body 2. When the LED 9a is turned on, the light from the LED 9a passes through the light transmission window 9b and is emitted from the top surface of the cover 21 to the outside. Therefore, in a state where the plug 4 is connected to the socket, if the remaining capacity of the battery 12 decreases and the LED 9a is turned on, the light from the LED 9a is emitted from the light transmission window 9b. In the present embodiment, the lighting portion 9 is constituted by the LED 9a and the light transmission window 9b.

The light-transmitting window 3b is formed of a light-transmitting material such as an acrylic resin, and is provided on a top surface of the cover body 21 at a portion facing the brightness sensor 3a, and is exposed on the upper side of the device body 2. If the light around the body 2 penetrates the light transmission window 3b and enters the brightness sensor 3a, the output current of the brightness sensor 3a changes according to the surrounding brightness.

The switch knob 32 is provided so that the hole 21b on the top surface of the body 2 is exposed to the outside in a state where the operation portion of the switch 31 is covered. The switch 31 is switched by sliding the switch knob 32 in the left-right direction. If the switch knob 32 is set to one end side in the sliding direction (right side of FIG. 3 in this embodiment), the night light function is enabled; if the switch knob 32 is set to the other end side in the sliding direction (in this embodiment (To the left of Figure 3), the night light function is disabled.

A lighting switch 8 is provided on one side surface of the device body 2 in the left-right direction (the left side surface of the device body 2 in the present embodiment). The lighting switch 8 is a switch that turns on / off the LED 5 b in a state where power is not supplied from the commercial power source 17. The lighting switch 8 is configured by, for example, a push switch. When power is not supplied from the commercial power source 17, the control circuit 7 is switched on / off of the LED 5b by pressing the lighting switch 8 once. The lighting switch 8 is not limited to a push switch, and may be a suitable type of switch that maintains the state after switching.

A plug 4 is mounted on the back of the body 22. As shown in FIG. 4, the plug 4 supports the front end of the plug 4 so as to be arbitrarily rotatable between a position facing the back surface of the body 22 and a position facing the top surface. In the state where the plug 4 is disconnected from the socket (not shown) of the commercial power source 17, if the front end of the plug 4 is oriented toward the top surface, the plug 4 is rotated in the direction of arrow A1 in FIG. 4 is housed in a groove 41 provided in the body 22.

On the lower side of the back surface of the device body 2, as shown in FIG. 6, a storage recess 23 a for storing the battery 12 is provided. This storage recessed portion 23a is closed by a cover portion 23b that is detachably attached to the main body 22. The battery 12 is a primary battery that is easily accessible, and is stored in the storage 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 substrate 10 is housed 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 substrate 10. The main substrate 10 is electrically connected to the sub substrate 51, the battery 12, and the plug 4, respectively.

Here, the operation of the lighting fixture 1 according to this embodiment will be described.

First, an operation when the switching knob 32 is switched to a position where the night light function is enabled will be described.

The body 2 is mounted on a wall surface (not shown) in a state where the plug 4 is connected to a socket (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 in a state where power is supplied from the commercial power supply 17. The control circuit 7 stops the step-up operation of the step-up circuit 16 when the signal SN1 is input. The control circuit 7 and the lighting circuit 6 each operate with power supplied from a commercial power source 17.

In a state where power is supplied from the commercial power source 17, if the surrounding brightness obtained from the output current of the brightness sensor 3a is darker than a predetermined value, the control circuit 7 turns on the switch SW1 to automatically turn on the LED 5a. The light emitted from the LED 5a toward the light incident portion 13b is diffused by the light diffusion portion 19, and is emitted from the light extraction portion 13a to the outside. The light emitted from the light extraction portion 13 a of the light guide plate 13 irradiates a floor surface (not shown) around the lighting fixture 1. Since the light emitting color of the LED 5a is a bulb color, it is not easy to feel dazzling even when the floor surface is illuminated at night. On the other hand, in a state where power is supplied from the commercial power source 17, if the surrounding brightness obtained from the output current of the brightness sensor 3a is brighter than a predetermined value, the control circuit 7 turns off the switch SW1 to automatically turn the LED 5a on. Off.

When the changeover switch 31 is switched to a position where the night light function is disabled, the control circuit 7 maintains the OFF state of the switch SW1 even if the surrounding brightness obtained from the output current of the brightness sensor 3a is darker than a predetermined value. LED5a is off.

Next, the operation of the luminaire 1 when it is operated by the power supplied from the battery 12 will be described.

If the plug 4 is unplugged from the socket (not shown) of the commercial power supply 17 or a power failure occurs, the power failure detection circuit 11 stops the output of the signal SN1. In addition, if 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 power of the battery 12 to the control circuit 7. If the control circuit 7 does not input the signal SN1 from the power failure detection circuit 11, the control circuit 7 performs a step-up operation in the step-up circuit 16, and the step-up circuit 16 outputs a predetermined DC voltage to the regulator 15. That is, the control circuit 7 and the lighting circuit 6 are operated by electric power supplied from the battery 12.

After the control circuit 7 operates the booster circuit 16, the switch SW2 is turned on to turn on the LED 5b. Therefore, if a power failure occurs while the lighting fixture 1 is connected to the socket, the LED 5b automatically lights up and irradiates light emitted from the light extraction portion 13a of the light guide plate 13 in the irradiation direction. The light emitting color of the LED 5b is white, so if the lighting fixture 1 is used as a hand-held light source, the brightness is improved, and the surrounding conditions can be more easily recognized.

When the LED 5b is turned on by the power supplied from the battery 12, if the lighting switch 8 is turned off, the control circuit 7 turns the switch SW2 to the OFF state to turn off the LED 5b. Similarly, when the lighting switch 8 is turned on in a state of being operated by the power supplied from the battery 12, the control circuit 7 turns on the switch SW2 to turn on the LED 5b, and the light from the light guide plate 13 The extraction portion 13a emits light.

Even if the control circuit 7 and the lighting circuit 6 are each operated by electric power supplied from the commercial power source 17, the remaining capacity of the battery 12 is gradually reduced due to, for example, natural discharge. If the voltage 电池 of the battery 12 output by the voltage measurement circuit 14 is lower than the predetermined voltage 控制, the control circuit 7 judges that the remaining capacity of the battery 12 is lower than the predetermined capacity of the notification level, and turns on the switch SW3 to turn on the LED 9a. When the LED 9a is turned on, the light from the LED 9a passes through the light transmission window 9b and is emitted from the upper side of the body 2 to the outside. The user can easily recognize the light of the LED 9a by observing from the upper side of the body 2, so the reduction of the remaining capacity of the battery becomes easy to recognize, and the necessity of replacing the built-in battery 12 can be grasped.

In the case where the lighting device 1 is operated by the power supplied from the battery 12, if the output voltage of the battery 12 is lower than a predetermined voltage, the control circuit 7 will also turn on the LED 9a. In order to further suppress the power consumption of the battery 12 and light up the LED 9a, the control circuit 7 may, for example, turn off the LED 9a after a predetermined period of time, or turn off the LED 9a at a predetermined period.

As described above, the lighting device 1 of this embodiment includes a plug 4, a lighting circuit 6, a lighting switch 8 (operation portion), a light guide plate 13, a brightness sensor 3a (illumination conversion portion), and a control circuit 7 (control部), and body 2. The plug 4 is detachably connected to a socket of a commercial power source 17. The lighting circuit 6 lights a lighting load (LEDs 5a and 5b in this embodiment). The lighting switch 8 (operation part) is operated in order to turn on or off a lighting load (LED5b in this embodiment). The light guide plate 13 guides the light emitted from the illumination load (LEDs 5a, 5b) incident on the incident surface (upper side of the light incident portion 13b) and emits it from the emitting surface (front surface of the light extraction portion 13a) to the outside. The brightness sensor 3a (illumination conversion unit) changes the output size (current 値 in this embodiment) according to the surrounding brightness. The control circuit 7 (control section) controls the lighting circuit 6 if the brightness (peripheral brightness) obtained from the output of the brightness sensor 3a (illumination conversion section) is darker than a predetermined threshold, and passes the plug from the socket through the plug 4 The electric power supplied lights the lighting load (LED5a in this embodiment). If the control circuit 7 (control section) performs a lighting operation using the lighting switch 8 (operation section), the control circuit 7 controls the lighting circuit 6 to turn on the lighting load (LED5b in this embodiment) by the power supplied from the battery 12 light. The device body 2 includes a plug 4, a lighting circuit 6, a lighting switch 8 (operation portion), a light guide plate 13, a brightness sensor 3 a (illumination conversion portion), and a control circuit 7 (control portion) to enable the light guide plate 13. The light emitting surface (the front surface of the light extraction portion 13a) is exposed from one surface (the front surface in this embodiment). The exit surface (the front surface of the light extraction portion 13 a) of the light guide plate 13 has an area of one half or more of one surface (the front surface of the body 2). The control circuit 7 controls the lighting circuit 6 so that the color temperature of the lighting load (LED5b) lit by the power supplied from the battery 12 is lower than the color temperature of the lighting load (LED5a) lit by the power supplied from the commercial power supply 17. higher.

The light guide plate 13 has an area of more than half of one surface (front surface) of the device body 2 and is exposed on one surface (front surface) of the device body 2 to illuminate the surroundings of the lighting device 1. Therefore, the lighting device 1 is used as a handheld light source When used, it can illuminate a wider area. In addition, compared with the color temperature of the radiated light when the lighting fixture 1 is used as a night light, the color temperature of the radiated light when used as a hand-held light source is higher, so the visibility is improved, and it is convenient to use as a handheld light source.

In the luminaire 1, the light emitted from a lighting load (LED 5a in this embodiment) when power is supplied from a commercial power supply 17 is preferably a light bulb color; the lighting load when power is supplied from a battery 12 (in this embodiment) For LED5b), it should be white. When the luminaire 1 is used as a hand-held light source, the white radiated light emitted from the light guide plate 13 illuminates a wider range, so that the visibility is improved. When the luminaire 1 is used as a night light, the light-emitting-ray-radiated light is emitted from the light guide plate 13, so that it is difficult to feel dazzling even if the floor surface is illuminated at night.

The control circuit 7 of this embodiment uses the power control switch SW2 supplied from the battery 12 to turn on the LED 5b, and the power control switch SW1 supplied from the commercial power supply 17 to turn on the LED 5a to realize two kinds of radiation with different color temperatures. Light.

Although the lighting load of this embodiment is composed of two LEDs 5a and 5b, the LEDs are not limited to two. If it is a structure that can emit two kinds of radiated light with different excellent temperatures, one or three or more LEDs are used. can. In addition, the type of the lighting load is not limited to the LED, and may be a suitable structure capable of emitting two kinds of radiated light having different excellent temperatures. Further, the method of switching between two kinds of radiated light having different color temperatures is not limited to ON / OFF of the switch of the lighting load, and may be an appropriate switching method.

In recent years, the primary battery has been improved to improve the performance of the primary battery and increase the service life. Therefore, in the lighting device 1 of this embodiment, a primary battery that is easier to obtain than the secondary battery is used as the battery 12. However, since the battery 12 that is a primary battery cannot be charged, the remaining capacity of the battery 12 is gradually reduced due to natural discharge or the like. Therefore, there is a possibility that the user may not notice that the remaining capacity of the battery 12 decreases, and when the lighting fixture 1 is used as a handheld light source, the lighting fixture 1 may not be fully used. The lighting device 1 of this embodiment lights up the lighting unit 9 and notifies the decrease in the remaining capacity of the battery 12, so that it becomes easy for the user to recognize the decrease in the remaining capacity of the battery 12.

Although the lighting portion 9 of the present embodiment is composed of LEDs 9a and light-transmitting windows 9b, it may be a structure that emits light from the upper side of the body 2. For example, the front end of a cannonball-type LED mounted on the sub-board 51 can be A part is exposed on the upper side of the body 2.

Although the brightness sensor 3a of this embodiment is constituted by an element that changes the current 値 according to the illuminance, it may be, for example, a photoresistor whose resistance 値 changes according to the illuminance.

Although the battery 12 of this embodiment is an AA-type primary battery, it may be a type other than AA-type, or it may be a charged secondary battery (for example, a nickel-hydrogen rechargeable battery).

Although the voltage measurement circuit 14 of this embodiment measures the output voltage in order to detect the remaining capacity of the battery 12, it is not limited to the measurement of the output voltage, and may be a suitable method capable of detecting the remaining capacity of the battery.

The above description has described an example in which the lighting fixture 1 includes the two LEDs 5 a and 5 b, and the LED 5 a or the LED 5 b is turned on depending on the type of power source to which the lighting fixture 1 supplies power. That is, in the lighting fixture 1 of this embodiment, the lighting load includes an LED 5a (first lighting load) that emits light at a first color temperature, and an LED 5b (second lighting load) that emits light at a second color temperature that is higher than the first color temperature. The control circuit 7 (control unit) controls the lighting circuit 6 to turn on the LED 5a (first lighting load) when power is supplied from the commercial power source 17, and to turn on the LED 5b (second lighting load) when power is supplied from the battery 12. light.

Moreover, the lighting fixture 1 may be comprised so that both LED5a and LED5b may be lighted. Hereinafter, a modified example of the lighting fixture 1 configured to have both the LED 5a and the LED 5b turned on will be described.

In the lighting fixture 1 of the modification 1, the lighting load includes an LED 5a (first lighting load) that emits light at a first color temperature, and an LED 5b (second lighting load) that emits light at a second color temperature that is higher than the first color temperature. The control circuit 7 (control unit) controls the lighting circuit 6 to turn on the LED5a (first lighting load) and LED5b (second lighting load) when the power is supplied from the commercial power source 17, and to supply power from the battery 12. Turn on LED5b (second lighting load). When the lighting fixture 1 of the modification 1 is supplied with power from a commercial power source, both the LEDs 5a and 5b are turned on, so that the periphery of the foot height can be illuminated more widely than the lighting fixture 1 of this embodiment. . In addition, by lighting both the light emitting color LED5a and the light emitting color white LED5b, the color temperature of the light emitting color of the lighting device 1 is higher than that of the lighting device 1 of this embodiment, and it can be used even for a foot lamp. Make the surroundings easy to recognize. In addition, when the lighting fixture 1 according to the modification 1 is used as a handheld light source by the operation of the power of the battery 12, only the LED 5b with a white emission color is lit, and both the LEDs 5a and 5b are lit. In contrast, power consumption can be suppressed. And the luminous color of LED5b should also be white which is easy to recognize around.

In the lighting fixture 1 of the modification 2, the lighting load includes an LED 5a (first lighting load) that emits light at a first color temperature, and an LED 5b (second lighting load) that emits light at a second color temperature that is higher than the first color temperature. The control circuit 7 (control unit) controls the lighting circuit 6 to turn on the LED 5a (first lighting load) when power is supplied from the commercial power source 17, and to turn on the LED 5b (second lighting load) when power is supplied from the battery 12. Lighting with LED5b (second lighting load). The lighting fixture 1 according to the second modification is a foot lamp that is operated by electric power supplied from a commercial power source 17 and illuminates the surroundings with a bulb color. On the other hand, since the two LEDs 5a and 5b are turned on as a handheld light source operated by the power supplied from the battery 12, it can illuminate a wider range brighter than the handheld light source of the first modification.

The color temperature of the light emitting color (radiated light) of LED5a (the first lighting load) in the modification examples 1 and 2 is preferably a bulb color of about 2700 to 3000K, and the color temperature of the light emitting color (radiated light) of LED5b (the second lighting load) is appropriate. It is about 4000K white.

1‧‧‧lighting appliances
2‧‧‧ body
3a‧‧‧Brightness sensor
3b, 9b‧‧‧Translucent windows
4‧‧‧Plug
5a, 5b, 9a‧‧‧LED
6‧‧‧lighting circuit
7‧‧‧Control circuit
8‧‧‧lighting switch
9‧‧‧lighting department
10‧‧‧Main board
11‧‧‧ Power failure detection circuit
12‧‧‧ battery
13‧‧‧light guide
13a‧‧‧light extraction section
13b‧‧‧light incident section
14‧‧‧Voltage measurement circuit
15‧‧‧ Regulator
16‧‧‧Boost circuit
17‧‧‧Commercial Power
18‧‧‧ Power Circuit
19‧‧‧ Light Diffusion Department
21‧‧‧ Cover
21a‧‧‧ protrusion
21b‧‧‧hole
21c‧‧‧Opening
22‧‧‧ Ontology
23a‧‧‧Concave
23b‧‧‧ cover
31‧‧‧Switch
32‧‧‧ switch knob
41‧‧‧ trench
51‧‧‧ Substrate
SN1, SN2‧‧‧‧Signal
SW1 ～ SW3‧‧‧‧Switch
VDD‧‧‧ Power terminal

FIG. 1 is a front view illustrating the main parts of the lighting fixture according to the embodiment. Fig. 2 is a right cross-sectional view illustrating the main parts of the lighting fixture according to the embodiment. Fig. 3 is a plan view of a lighting fixture according to the embodiment. Fig. 4 is a left side view of the lighting fixture of the embodiment. Fig. 5 is a front view of the lighting fixture of the embodiment. Fig. 6 is an exploded perspective view illustrating the main parts of the lighting fixture according to the embodiment. Fig. 7 is a schematic circuit block diagram of a lighting fixture according to the embodiment.

1‧‧‧lighting appliances

2‧‧‧ body

3a‧‧‧Brightness sensor

3b, 9b‧‧‧Translucent windows

4‧‧‧Plug

5a, 5b, 9a‧‧‧LED

8‧‧‧lighting switch

9‧‧‧lighting department

13‧‧‧light guide

13a‧‧‧light extraction section

13b‧‧‧light incident section

21b‧‧‧hole

22‧‧‧ Ontology

31‧‧‧Switch

32‧‧‧ switch knob

51‧‧‧ Substrate

Claims (7)

A lighting appliance comprising the following components: a plug connected to a socket of a commercial power source in a detachable manner; a lighting circuit that lights a lighting load; an operation unit that accepts an operation to turn the lighting load on or off ; A light guide plate having an incident surface and an exit surface for guiding the radiated light of the lighting load incident on the incident surface so that it is radiated from the exit surface to the outside; the illuminance conversion unit changes the size of the output according to the surrounding brightness; The control unit controls the lighting circuit if the brightness obtained from the output of the illuminance conversion unit is darker than a predetermined value, and lights the lighting load by using the power supplied from the socket through the plug; When the operation part performs a lighting operation, the lighting circuit is controlled to light the lighting load by the power supplied from the battery; and a body having the plug, the lighting circuit, the operation part, the light guide plate, the The illuminance conversion unit and the control unit make the exit surface of the light guide plate be exposed from one side of the body; wherein the exit surface of the light guide plate has more than one half of the side. The control unit controls the lighting circuit so that the color temperature of the lighting load when the power is supplied from the battery is higher than the color temperature of the lighting load when the power is supplied from the commercial power source, and the incident surface is A surface that intersects the exit surface and is configured to be opposite to the lighting load, and the radiated light entering the lighting load from the incident surface through the light guide plate passes through the light guide plate, and is guided by the light guide plate to pass through. The exit surface is radiated to the outside. For example, the lighting fixture of item 1 of the patent application scope, wherein the radiated light of the lighting load when the commercial power supply is supplied with electricity is a bulb color; the radiated light of the lighting load when the power is supplied from the battery is white. For example, the lighting apparatus of the first patent application scope, wherein the lighting load has 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 that is higher than the first color temperature; the The control unit controls the lighting circuit, lights up the first lighting load when power is supplied from the commercial power source, and lights up the second lighting load when power is supplied from the battery. For example, the lighting apparatus of the first patent application scope, wherein the lighting load has 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 that is higher than the first color temperature; the The control unit controls the lighting circuit to light the first lighting load and the second lighting load when power is supplied from the commercial power source, and lights the second lighting load when power is supplied from the battery. For example, the lighting apparatus of the first patent application scope, wherein the lighting load has 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 that is higher than the first color temperature; the The control unit controls the lighting circuit to light the first lighting load when power is supplied from the commercial power source, and lights the first lighting load and the second lighting load when power is supplied from the battery. For example, the lighting apparatus according to any one of claims 3 to 5, in which the first color temperature is the color temperature of the bulb color; the second color temperature is the white color temperature. For example, the lighting fixture according to item 1 of the patent application scope, wherein a light diffusing portion for diffusing the radiated light passing through the light guide plate is provided on the back surface of the emission surface, and the radiated light diffused by the light diffusing portion The exit surface is radiated to the outside.