JP5669094B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture installed on a ceiling surface or the like using an LED (light emitting diode) as a light source.

2. Description of the Related Art Conventionally, there is known a lighting fixture that is attached to a ceiling surface using an LED as a light source and illuminates a lower portion (see, for example, Patent Document 1).
The lighting fixture described in Patent Literature 1 is equipped with a plurality of LEDs that irradiate light downward on the bottom surface of the fixture body that is suspended from the ceiling surface, and has translucency and the LED's with respect to the fixture body. A light guide body rotatably connected so as to change the direction in which light is emitted is provided.

Japanese Patent No. 4363387 (FIG. 1, paragraph 0010)

The lighting fixture of patent document 1 can change light distribution easily by rotating a light guide with respect to a fixture main body.
By the way, the lighting fixture which equips the bottom face of a fixture main body with several LED similarly to the lighting fixture of patent document 1, and controls light control of several LED is proposed.
Such a conventional lighting fixture automatically dims the LED according to the illuminance value from the sensor.
However, as shown in FIG. 8, such conventional luminaire, during operation of the sensor, if at the time T ₁₂ to time T ₁₁ and continuous, for example by the passage or the like of the human signal is blocked continuously Regardless of the ambient brightness, the signal temporarily falls below the reference value.
Therefore, such a conventional lighting fixture gives a sense of incongruity to the user by self-flashing by repeatedly turning on and off at the dimming lower limit.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a lighting apparatus that can prevent a user from feeling uncomfortable.

Lighting device according to the present invention is to set a light source, a sensor for detecting the illuminance based on the incident light, the target value based on the detected value of the sensor, the detection value of the sensor is determined by the target value A light source lighting circuit for automatically dimming the light source so as to be within an allowable range, and the light source lighting circuit includes a first reference value as the target value as a reference value for automatic dimming A second reference value, which is larger than the first reference value and larger than an upper limit value of an allowable range determined by the target value, and serves as a reference when the light source is automatically turned off. In the light, the dimming level of the light source reaches the dimming lower limit, and the light source is turned on at the brightness corresponding to the dimming lower limit. The detection value of the sensor is more than the second reference value When the determination result that heard were obtained, Ru turns off the light source.

In the lighting fixture according to the present invention, when the light source lighting circuit turns off the light source when the determination result is obtained, the brightness control for turning off the light source is performed, and the brightness of the light source is adjusted. Ru gradually decreased from the brightness corresponding to the lower limit.

The luminaire according to the present invention is provided with a first light source of a first emission color and a second light source of a second emission color as the light source, and the first emission color of the first light source. In a state where illumination is performed by illumination light in which light and light of the second light emission color of the second light source are mixed, the light source lighting circuit applies to each of the first light source and the second light source. If the first light source and the second light source are turned off as a result, the light source lighting circuit is one of the first light source and the second light source. Even when one reaches the light control lower limit earlier than either one and the determination result is obtained, until one of the other reaches the light control lower limit and the determination result is obtained, Lighting at a brightness corresponding to one of the dimming lower limits By continuing the one and the other one and both turns off the.

  According to the lighting fixture concerning this invention, there exists an effect that a discomfort to a user can be prevented.

The disassembled perspective view seen from diagonally downward of the lighting fixture of one Embodiment which concerns on this invention The vertical sectional view of the lighting fixture of one embodiment concerning the present invention The bottom view of the lighting fixture of one Embodiment which concerns on this invention The block block diagram of the lighting fixture of one Embodiment which concerns on this invention FIG. 3 is a relationship diagram of light control and time after fade control of a lighting apparatus according to an embodiment of the present invention. FIG. 3 is a diagram illustrating the relationship between light control and time of a lighting apparatus according to an embodiment of the present invention. FIG. 5 is a diagram illustrating the relationship between light control and time in a modification of the lighting apparatus according to the embodiment of the present invention. Diagram of dimming and time of conventional lighting fixtures

Hereinafter, a lighting apparatus according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a lighting fixture 10 according to an embodiment of the present invention includes a fixture main body 11, an upper LED unit 12 attached to the upper surface of the fixture main body 11, and an upper frame 13 that covers the upper portion of the upper LED unit 12. With.
The lighting fixture 10 includes an upper panel 14 attached to the upper portion of the upper frame 13, a reflector 15 attached to the lower surface of the fixture body 11 with screws 16, and a lower LED unit 17 attached to the lower surface of the reflector 15. Prepare.
The lighting fixture 10 includes a light receiving unit 18 attached to the lower surface of the reflecting plate 15 and a lower panel 19 attached to the lower surface of the reflecting plate 15.

As shown in FIG. 2, the instrument body 11 has a mounting bracket 20 at the center that is mechanically attached and electrically connected by being hooked to a hooking ceiling 2 installed on the ceiling surface 1. .
The instrument body 11 is formed of a thin metal plate member, and includes a central top plate 21, an upper side plate 22 connected to the outer side of the central top plate 21, and a side connected to the upper side plate 22. It has a part top plate 23 and a lower side plate 24 connected to the outside part of the side top plate 23.

The upper LED unit 12 has an LED substrate 25 attached to the outer surface of the upper side plate 22 of the instrument body 11 with the irradiation direction directed sideways, and has a lens cover 26 having translucency.
When driven, the upper LED unit 12 emits light toward the side portion of the fixture body 11 and the ceiling surface 1 through the lens cover 26.
The lower LED unit 17 has an LED substrate 27 attached inward on the lower surface of the upper side plate 22 of the instrument body 11 with the irradiation direction directed inward, and has a lens cover 28 having translucency.
The lower LED unit 17 is driven to emit light reflected by the reflecting plate 15 through the lens cover 28 toward the lower side of the instrument body 11.

As shown in FIG. 3, the upper LED unit 12 includes a first upper LED unit 29 disposed in the + X direction of the instrument body 11 and a second upper LED unit 30 disposed in the −X direction of the instrument body 11. Prepare.
The upper LED unit 12 includes a third upper LED unit 31 arranged in the + Y direction of the appliance main body 11 and a fourth upper LED unit 32 arranged in the −Y direction of the appliance main body 11.
At this time, it is preferable that the second upper LED unit 30 is arranged with the irradiation direction facing the back of the television in the room.
The lower LED unit 17 includes a pair of first lower LED units 33 disposed in the + Y direction of the instrument body 11 and a pair of second upper LED units 34 disposed in the −Y direction of the instrument body 11.

As shown in FIG. 4, the luminaire 10 includes a power supply unit 35 and a remote control light receiving unit 36, and the power supply unit 35 includes a light source lighting circuit 37.
The light source lighting circuit 37 includes a chopper power circuit block 38 to which power is connected, an energization input circuit block 39 to which power is connected, and a power circuit block 40 to be connected to the chopper power circuit block 38.
The light source lighting circuit 37 includes a first circuit block 41, a second circuit block 42, a third circuit block 43, and a fourth circuit block 44 connected to the chopper power supply circuit block 38.

The first circuit block 41 supplies power to the plurality of first type LEDs 45. The first type LED 45 is a white LED and is attached to the first lower LED unit 33 and the second upper LED unit 34 included in the lower LED unit 17.
The second circuit block 42 supplies power to the plurality of second type LEDs 46. The second type LED 46 is a light bulb color LED, and is attached to the first lower LED unit 33 and the second upper LED unit 34 included in the lower LED unit 17.
At this time, the first type LED 45 and the second type LED 46 are alternately attached to the first lower LED unit 33 and the second upper LED unit 34 two by two.

The third circuit block 43 supplies power to the plurality of third type LEDs 47. The third type LED 47 is a light bulb color LED.
The third type LED 47 is attached to the first upper LED unit 29, the third upper LED unit 31, and the fourth upper LED unit 32 excluding the second upper LED unit 30 in the upper LED unit 12.
The fourth circuit block 44 supplies power to the fourth type LED 48. The fourth type LED 48 is attached to the second upper LED unit 30 of the upper LED unit 12.

The remote control light receiving unit 36 includes a power supply circuit block 49 connected to the power supply circuit block 40 of the power supply unit 35 and a microcomputer peripheral circuit unit 50 connected to the power supply circuit block 49. The microcomputer peripheral circuit unit 50 is supplied with an INT signal from the energization input circuit block 39.
The remote control light receiving unit 36 includes a signal input circuit block 51 which is connected to the power supply circuit block 49 and connected to the microcomputer peripheral circuit unit 50 and to which an external signal is given.
The remote control light receiving unit 36 includes a storage circuit block 52 connected to the power supply circuit block 49 and connected to the microcomputer peripheral circuit unit 50, and an operation switch (operation SW) 53 that gives an operation signal to the microcomputer peripheral circuit unit 50. .

The remote control light receiving unit 36 includes an overvoltage detection input block 54 connected to the output side of each of the first circuit block 41, the second circuit block 42, the third circuit block 43, and the fourth circuit block 44. .
The remote control light receiving unit 36 includes a sensor circuit block 56 for transmitting and receiving a sensing signal given from an energy saving sensor (sensor) 55 including an infrared sensor or the like to and from the microcomputer peripheral circuit unit 50.
The remote control light receiving unit 36 inputs the duty dimming output from the microcomputer peripheral circuit unit 50 to the first circuit block 41, the second circuit block 42, the third circuit block 43, and the fourth circuit block 44, respectively. An output circuit block 57 is provided to the side.
Further, the output circuit block 57 gives the boost chop power supply output from the microcomputer peripheral circuit section 50 to the chopper power supply circuit block 38.

The light source lighting circuit 37 pulse-lights the first type LED 45 through the first circuit block 41 and the second type LED 46 through the second circuit block 42.
The light source lighting circuit 37 pulse-lights the third type LED 47 through the third circuit block 43 and the fourth type LED 48 through the fourth circuit block 44.
Then, the light source lighting circuit 37 performs the dimming control by changing the duty ratio (ratio between the on time and the off time) to change the light emission amount as the light emission time.

If the sensor average value <the target value allowable range lower limit, the light source lighting circuit 37 proceeds to brightness adjustment in the bright direction. On the other hand, if the target value allowable range lower limit <sensor average value, the process shifts to brightness adjustment in the dark direction.
When the number of dimming steps is the lowest limit of the number of normal dimming steps and the light extinction reference value <sensor average value continues multiple times in succession, the light source lighting circuit 37 switches from the lighting brightness adjustment operation to the turn-off brightness adjustment operation. Migrate to

The light source lighting circuit 37 sets the first reference value of the sensor voltage as 1.0 V, for example, and sets the second reference value of the sensor voltage as the extinction reference value as different from the first reference value. Have hysteresis.
The extinction reference value, which is the second reference value, is obtained by Equation 1 below. In this case, α is set to 2.0 times the first reference value, for example.

The light source lighting circuit 37 fades off the first type LED 45 through the first circuit block 41 and the second type LED 46 through the second circuit block 42 by fading when performing the brightness adjustment operation from the lighting brightness adjustment operation. .
The light source lighting circuit 37 turns off the output from the boost chopper power supply circuit block 38 when the fade is finished and the light source is turned off.
The light source lighting circuit 37 turns off the boost chopper threshold value switching output.
At this time, the light source lighting circuit 37 keeps the display LED (not shown) lit.
Then, the light source lighting circuit 37 shifts to measurement of brightness after the light is turned off by fading, the output from the boost chopper power supply circuit block 38 is turned off, and the boost chopper threshold value switching output is turned off.

As shown in FIG. 5, the light source lighting circuit 37, the brightness measured at a plurality of times successively at time T _1, when it becomes extinguished reference value <sensor input values, fade regulating the output from the lower limit of the normal dimming stages Use the number of light steps to fade out.
The light source lighting circuit 37 shifts to the measurement of brightness after fade-off at time T ₂ after time T ₁ .

As shown in FIG. 6, the light source lighting circuit 37 determines that the sensor voltage is bright when the sensor voltage is in the region A1 larger than + 5% with respect to the first reference value, and the first circuit block 41 and the second circuit. Reduce the duty for block 42.
The light source lighting circuit 37 determines that the sensor voltage is dark, for example, in a region A2 smaller than −10% with respect to the first reference value, and sets the duty for the first circuit block 41 and the second circuit block 42. increase.
The light source lighting circuit 37 does not change the state when the sensor voltage is, for example, the region A3 within ± 10% of the first reference value.
Furthermore, the light source lighting circuit 37 executes the extinguishing operation if the light control lower limit is, for example, in the region A4 where the sensor voltage is larger than the second reference value which is 2.0 times the first reference value.
Thereby, the light source lighting circuit 37 is turned off when it is continuously bright at the dimming lower limit.
Light source lighting circuit 37, at time T _1, when it exceeds larger than a certain percentage of the first reference value at a dimming lower limit, executes off control.
When the light source lighting circuit 37 is continuously bright at the dimming lower limit at the time point T ₂ , the time point T ₃ , the time point T ₄ , the time point T ₅ , and the time point T ₆ , the light source lighting circuit 37 executes the light-off control.
Thus, the light source lighting circuit 37 performs delay control for delaying the turn-off when the light control lower limit is reached.

Next, the modification of the lighting fixture 10 is demonstrated.
As shown in FIG. 7, the light source lighting circuit 37 of the present modification is a first type LED 45 that is a white LED and has a color temperature of light color A, and a light bulb color LED that has a color temperature of light color B. Dimming control of the second type LED 46 is performed independently.
By dimming control signal for the lower limit is given to the remote control light receiving unit 36, with the power supply of the dimming control from the first circuit block 41, the first type LED45 at time T ₁ is to reach the dimming lower limit value .
However, the first circuit block 41, at time _{T 1,} without turning off the first one LED 45, which kept the dimming lower limit.
Accordingly, the first type LED 45 continues to be lit with the dimming lower limit value.

At time T ₂ after time T ₁ , while the first type LED 45 is lit at the dimming lower limit value, the second type LED 46 is adjusted at time T ₂ in accordance with the power supply of dimming control from the second circuit block 42. The lower light limit is reached.
Accordingly, the light source lighting circuit 37 stops the power supply of the dimming control from the first circuit block 41 and the second circuit block 42.
Thus, at time _{T 2,} the first type LED45 and second type LED46 are both turned off.

As described above, the light source lighting circuit 37 causes the first type LED 45 and the second type LED 46 to be turned on when the second type LED 46 reaches the lower dimming limit after the first type LED 45 reaches the lower dimming limit by the dimming operation. Turn off the light.
Therefore, when the first type LED 45 of the light color A reaches the lower limit value of the dimming, if the second type LED 46 of the light color B is before the lower limit value of the dimming, the first type LED 45 of the light color A is Continue lighting at the lower limit without turning off.
Thereby, since only the light of the 2nd type LED46 of the light color B is conspicuous and does not give a user a sense of incongruity, a sense of discomfort to the user can be prevented.

  As described above, according to the luminaire 10 of the embodiment, the self-flashing which repeats the turn-off and turn-on is performed for the first time when it is in the same region a plurality of times continuously with respect to the first reference value. This can prevent the user from feeling uncomfortable.

Moreover, according to the lighting fixture 10 of one Embodiment, when the brightness | luminance has fluctuate | varied slightly near the 1st reference value by making the reference value which turns off into the 2nd reference value different from a 1st reference value Self-flashing can be prevented.
And according to the lighting fixture 10 of one Embodiment, when it turns off from 10% of light control, for example, it can detect that it became dark and can prevent the self-flashing which makes a sensor voltage fall and relights.

Furthermore, according to the lighting fixture 10 of one embodiment, after the light source lighting circuit 37 is automatically dimmed, the second type LED 46 comes to the dimming lower limit after the first type LED 45 becomes the dimming lower limit. The first type LED 45 and the second type LED 46 are turned off.
And according to the lighting fixture 10 of one Embodiment, when 1st type LED45 of light color A reaches | attains the lower limit of light control, 2nd type LED46 of light color B exists before the lower limit of light control. Then, the first type LED 45 of the light color A is not turned off and continues to be lit at the lower limit value.
Therefore, according to the lighting fixture 10 of one embodiment, since only the light of the second type LED 46 of the light color B is conspicuous and does not give the user a sense of incongruity, it is possible to prevent the user from feeling discomfort.

  In addition, according to the lighting fixture 10 of one embodiment, when the first type LED 45 is turned off in the middle of the dimming lower limit, when switching to the dimming upper limit again, due to insufficient power supply capability, It can be prevented that the turned off first type LED 45 cannot be turned on.

  Furthermore, according to the lighting fixture 10 of one embodiment, the second upper LED unit 30 of the upper LED unit 12 is arranged with the irradiation direction facing the rear surface of the television in the room, so that the rear surface of the television is illuminated brightly. And you can produce light.

  In the lighting fixture of the present invention, the fixture body, upper frame, upper panel, reflector, light receiving unit, lower panel and the like are not limited to the above-described embodiment, and appropriate modifications and improvements are possible. is there.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 37 Light source lighting circuit 45 1st type LED (light source)
46 Type 2 LED (light source)
47 Type 3 LED (light source)
48 Type 4 LED (light source)
55 Energy-saving sensor (sensor)

Claims (3)

And a light source,
A sensor for detecting illuminance based on incident light;
Sets a target value based on the detected value of the sensor, the detection value of the sensor, to be within the allowable range determined by the target value, the light source lighting circuit for automatically dimming said light sources,
With
The light source lighting circuit is:
As a reference value for automatic light control, the first reference value that is the target value, and the light source that is larger than the first reference value and larger than an upper limit value of an allowable range determined by the target value. Set a second reference value, which is a reference when automatically turning off,
During automatic dimming, as a result of performing detection by the sensor in a state where the dimming level of the light source reaches the dimming lower limit and the light source is lit at the brightness corresponding to the dimming lower limit, a plurality of times when the determination result that the detection value of the sensor is greater than the second reference value in the continuous is obtained, luminaire Ru turns off the light source. The lighting fixture according to claim 1,
When the determination result is obtained and the light source is turned off, the light source lighting circuit executes brightness control for turning off the light source, and gradually adjusts the brightness of the light source from the brightness corresponding to the dimming lower limit. luminaire Ru is reduced to. The lighting fixture according to claim 1 or 2,
As the light source, a first light source of a first light emission color and a second light source of a second light emission color are provided, and the light of the first light emission color of the first light source and the light source of the second light source. The light source lighting circuit performs automatic dimming control independently for each of the first light source and the second light source in a state where the illumination light is mixed with the light of the second emission color. As a result, when both the first light source and the second light source are turned off,
Even when the light source lighting circuit reaches the light control lower limit earlier than any one of the first light source and the second light source and the determination result is obtained, Until either one reaches the light control lower limit and the determination result is obtained, lighting at a brightness corresponding to the one light control lower limit is continued, and A luminaire that turns off the other .

Images