JP2012243628A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination device capable of preventing an unstable action when switching lighting and extinguishing of illumination.SOLUTION: An illumination device 10 includes: light sources 15; a lighting circuit 16; an illuminance detecting portion 21 which detects reflection light of an irradiated surface of the light source 15 and converts that to voltage; and a control portion 35 providing an effective range so as to make a detection value detected by the illuminance detecting portion 21 generally match with a target value corresponding to required brightness, and having an automatic dimming function for outputting adjusting, lighting, and extinguishing signals of optical output. When determining that any one or more of the one or more light sources 15 is in a state immediately before extinguishing, the control portion 35 determines that the detection value is in a generally matching state with the target value and expands the effective range.

Description

  The present invention relates to a lighting device that keeps the average illuminance of an irradiated surface such as a floor surface or a desk surface substantially constant in a living room of a house, for example, and in particular, energy saving by performing dimming automatically according to daylight. It is related with the illuminating device which can do.

2. Description of the Related Art Conventionally, an illumination device is known that includes a lighting circuit capable of dimming control of the light output of a light source, and an illuminance detection unit that detects reflected light from an irradiated surface of the light source and converts it into a voltage (for example, Patent Literature 1).
Patent Document 1 includes a reference value storage unit that stores a detection value at a predetermined light output as a reference value, and a target value storage unit that calculates and stores a target value according to the reference value.
Patent Document 1 includes a control unit that adjusts the light output so that the detection value output by the illuminance degree detection unit substantially matches the target value, and provides a limit value for the reference value or the target value.

Conventionally, a lighting device including a lighting circuit capable of dimming and controlling the light output of a light source, and an illuminance detection unit that detects reflected light from an irradiated surface of the light source and converts it into a voltage is known (for example, Patent Document 2).
Patent Document 2 includes a control unit having an automatic dimming function that adjusts the light output so that the detection value output from the illuminance detection unit substantially matches the target value corresponding to the desired brightness. In response to the output dimming signal, dimming control of the optical output is performed.
In Patent Document 2, a limit value is provided for the dimming signal output from the control unit, and the dimming level operates below the dimming level corresponding to the desired brightness.

Japanese Patent Laying-Open No. 2010-97898 (FIG. 1, claim 1) Japanese Patent Laying-Open No. 2010-97901 (FIG. 1, claim 1)

However, in Patent Document 1 and Patent Document 2, there is a limit to the lower limit output value even if the output of the light source is lowered to the dimming control lower limit state.
Therefore, Patent Literature 1 and Patent Literature 2 can make a large difference between the illuminance of the lower light control room and the illuminance of the unlit room.
Therefore, as shown in FIG. 9, Patent Document 1 and Patent Document 2 are equipped with a function that can be turned off in a constant illuminance operation by automatic control, and when turning on / off control, the illuminance by turning off and turning on. The fluctuation range exceeds the effective range of the target value.
Therefore, at time _{T 81} ~ time _{T 82,} off, thereby repeating the lighting.
Also, as shown in FIG. 10, Patent Document 1 and Patent Document 2 are equipped with a function that can be turned off in an illuminance constant operation by automatic control, and when the turn-off → lighting control is performed, the illuminance due to the turn-off / lighting operation The fluctuation range exceeds the effective range of the target value.
Therefore, at time _{T 91} ~ time _{T 92,} off, thereby repeating the lighting.
Therefore, Patent Document 1 and Patent Document 2 give discomfort to the user who frequently turns on and off.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illuminating device that can prevent an unstable operation when the lighting is switched on and off.

  An illumination device according to the present invention includes a plurality of light sources, a lighting circuit capable of dimming, lighting, and extinguishing the light output of the light sources, and illuminance detection that detects reflected light from an irradiated surface of the light sources and converts the light into a voltage. And an effective dimming function that provides an effective range so that the detection value detected by the illuminance detection unit substantially matches the target value corresponding to the desired brightness, and outputs the light output adjustment, lighting, and extinction signals And a power supply unit for operating the light source, the lighting circuit, the illuminance detection unit, and the control unit, and the control unit turns off any one or more of the light sources. When it is determined that the previous state has been reached, the effective range is expanded by determining that the target value is substantially in agreement.

  In the illumination device according to the present invention, when the effective range is from a positive value to a negative value, the control unit expands only to the positive value.

  In the lighting device according to the present invention, when the control unit determines that any one or more of the light sources have reached a state immediately before lighting, the control unit determines that the target value is substantially in agreement with the target value. Expand the range.

  An illumination device according to the present invention includes a plurality of light sources, a lighting circuit capable of dimming, lighting, and extinguishing the light output of the light sources, and illuminance detection that detects reflected light from an irradiated surface of the light sources and converts the light into a voltage. And an effective dimming function that provides an effective range so that the detection value detected by the illuminance detection unit substantially matches the target value corresponding to the desired brightness, and outputs the light output adjustment, lighting, and extinction signals A control unit having a light source, the lighting circuit, the illuminance detection unit, and a power supply unit for operating the control unit, wherein the control unit lights any one or more of the light sources. When it is determined that the previous state has been reached, the effective range is expanded by determining that the target value is substantially in agreement.

  In the lighting device according to the present invention, when the effective range is from a positive value to a negative value, the control unit determines that any one or more of the light sources has reached a state immediately before lighting. The control unit expands only to the positive value.

  The lighting device according to the present invention is equipped with a function of turning on by fading in or turning off by fading out, and the state immediately before turning off when the control unit is not performing the fade in or fading out operation. And

  The lighting device according to the present invention has an effect that unstable operation can be prevented when lighting is switched on and off.

The side view of the illuminating device of 1st Embodiment which concerns on this invention. The bottom view of the illuminating device of 1st Embodiment which concerns on this invention. The block block diagram of the illuminating device of 1st Embodiment which concerns on this invention. The timing chart of the illuminating device of 1st Embodiment which concerns on this invention Timing chart of lighting apparatus according to second embodiment of the present invention Timing chart of lighting apparatus according to third embodiment of the present invention Timing chart of lighting apparatus according to fourth embodiment of the present invention Timing chart of lighting apparatus according to fifth embodiment of the present invention Timing chart of conventional lighting device Timing chart of a conventional lighting device different from FIG.

Hereinafter, lighting devices according to a plurality of embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, the lighting device 10 according to the first embodiment of the present invention includes a residential ceiling-type lighting fixture 11 and an infrared remote control device 12.
The lighting fixture 11 has a fixture fixing portion / power supply connection portion 14 disposed at the center of the housing 13.
The appliance fixing unit / power supply connection unit 14 is mechanically and electrically connected by being attached to a hooking ceiling (not shown) which is an appliance mounting unit / AC power supply unit installed on the ceiling surface 1.

The luminaire 11 opposes a casing 13 to a fluorescent lamp 15 as a main light source, a lighting circuit 16 of the fluorescent lamp 15, and a remote control receiver 17, and the light from the fluorescent lamp 15 is opposed to the ceiling surface 1 in the downward direction. It is assembled together with a reflector 18 for reflecting in the direction of the floor surface.
The lower surface of the lighting fixture 11 is covered with a resin cover 19 having translucency, and an illuminance detection unit 21 is incorporated in a part of the frame body 20.
The illuminance detection unit 21 detects reflected light from the illuminated surface of the fluorescent lamp 15 and converts it into a voltage.

As shown in FIG. 2, the housing 13 is formed in a circular shape, and the fluorescent lamp 15 is an annular fluorescent lamp.
The luminaire 11 does not necessarily require the cover 19 (see FIG. 1), and may be an open bottom pendant type that does not include the cover 19. An incandescent lamp may be used instead of the fluorescent lamp 15.
The housing 13 may be a quadrangle instead of a circle.

The illuminance detection unit 21 is a sensor element that can detect brightness, such as Cds (cadmium sulfide), PD (photodiode), or photo IC.
The sensor element may include an infrared cut function for detecting only a visible light component, or may be provided with an infrared cut filter separately.
About the attachment position of the illumination intensity detection part 21, if direct light from the lighting fixture 11 is not detected, arrangement | positioning will not be specifically limited.
For example, the illuminance detection unit 21 may be assembled at a position separated from the luminaire 10 in order to give the detection range flexibility.
The remote control receiving unit 17 has a light receiving element 22 for receiving an infrared remote control signal.
The remote control receiving unit 17 has an LED night light 23 in the vicinity of the light receiving element 22.

The remote control device 12 includes an infrared LED 24 for transmitting a remote control signal, an operation button 25 for operating the lighting fixture 11, and a setting button 26 for performing various settings.
In the remote control device 12, the communication means for transmitting and receiving does not have to be infrared, but may be, for example, weak wireless or specific low power wireless.

As shown in FIG. 3, the remote control receiving unit 17 includes a drive unit 27, a memory unit 28, a timer unit 29, and a control unit (microcomputer) 31 including a calculation unit 30.
The control unit 31 has an automatic dimming function for adjusting the light output so that the detection value output from the illuminance detection unit 21 substantially matches the target value corresponding to the desired brightness according to the stored program. And control each operation.

  The lighting circuit 16 is connected to an AC power source through a filter 32 to output DC power, and converts the DC power output from the power factor improvement unit 33 into AC power and supplies it to the fluorescent lamp 15. The inverter part 34 which performs and the control part 35 are provided.

The remote control device 12 includes a control unit 36.
The main uses of the operation button 25 are all the fluorescent lamps 15, increasing the dimming level, decreasing the dimming level, turning off, and automatic dimming (constant illumination control).
The setting button 26 includes a brightness setting button (not shown) for setting a target value and a correction button (not shown) for correcting a shift in detection voltage due to a difference in reflectance of the irradiated surface.

Next, as an example of the basic operation of the illumination device 10, a case where all the fluorescent lamps 15 are turned on will be described.
When the all lamp button in the operation button 25 of the remote control device 12 is pressed, a remote control signal for performing all the lamps of the fluorescent lamp 15 is transmitted from the infrared LED 24.

In the luminaire 11, the light receiving element 22 of the remote control receiving unit 17 receives a remote control signal.
The remote control receiving unit 17 discriminates the remote control signal by the control unit 31 and outputs a dimming signal for performing all lighting of the fluorescent lamp 15.
The dimming signal is, for example, a duty signal (having an operating frequency of about 1 KHz), and dimming control is performed by changing the duty ratio.
At this time, the remote control reception unit 17 stores a duty data table corresponding to the dimming ratio in the memory unit 28 in advance, and outputs a duty signal corresponding to the received remote control signal.

The lighting fixture 11 is a fixture that can continuously adjust the light in the range of 10 to 100% according to the duty signal, and turns on 100% of the rated output when the duty ratio of the duty signal is 100%.
The luminaire 11 is set to turn on 10% when the duty ratio is 10%.
Here, the output from the illuminance detection unit 21 is set in the range of, for example, 0 to 5 V according to the incident light. When the voltage is 0 V, there is no incident light (dark state). Bright state).
The remote control receiver 17 and the lighting circuit 16 are connected by a signal line, and the control unit 35 of the lighting circuit 16 receives the dimming signal, and the output of the inverter unit 34 is set to the full lamp output.
As a result, the fluorescent lamp 15 is fully lit.

Next, the automatic light control function of the illumination device 10 will be described.
When the automatic dimming button included in the operation button 25 of the remote control device 12 is pressed, first, the lighting device 11 is turned on at the dimming level at which the target value is set, and the illuminance measurement value matches the target value. Control the output of.
At this time, the control unit 31 of the remote control receiving unit 17 sets the target value to 560 LX (output) assuming that the average illuminance of the irradiated surface at the time of all lamps output (100%) is 700 LX, and the lower limit output (10%) is 70 LX. 80% equivalent).

The controller 31 of the remote control receiver 17 sets the light output to 80% when the external light is zero (0).
Then, the control unit 31 performs feedback control by determining an effective range within ± 5% so that the illuminance detection value becomes substantially constant at 560 LX while decreasing the light output as the external light increases.

In contrast, when the external light is 490 LX or more, the light output does not decrease to 10% or less, so that the average illuminance of the irradiated surface increases to 560 LX or more as the external light increases.
When the light output becomes 10%, the already set effective range is set to + 20% to −5% (positive value to negative value).
When the average illuminance exceeds the effective range, the light output is stopped.
When the light output is stopped, the effective range is set to -20%.
When the average illuminance falls below the effective range, the light output starts at 10%.

As shown in FIG. 4, in the illuminating device 10, the control unit 35 sets the normal effective range between time T ₁₁ and time T ₁₂ .
The lighting device 10 includes a control unit 35, at time T _13, when it is determined that the fluorescent lamp 15 has reached the state immediately before turning off, it is determined that there is substantially coincident state and the target value Sp, the time T ₁₃ in until to time _{T 14,} broaden the scope.
In the illuminating device 10, the control unit 35 sets a normal effective range after time T ₁₄ .

  The lighting device 10 is equipped with a function of turning on by fading in or turning off by fading out, and the control unit 35 sets the state immediately before turning off when the fade-in or fade-out operation is not performed to the state immediately before turning off.

As described above, according to the illuminating device 10 of the first embodiment, since the width of the effective range is increased in the state immediately before turning off (the state immediately after turning on), the output of the fluorescent lamp 15 is stabilized, and the fluorescent lamp 15 becomes difficult to turn off.
Moreover, according to the illuminating device 10 of 1st Embodiment, also in software operation | movement, the frequency | count of determination can respond only by two times of effective upper limit range determination and effective lower limit range determination.
Therefore, according to the illumination device 10 of the first embodiment, since this number of times is the same as the normal effective range determination (only determination of whether the effective range is outside the effective range), processing can be performed without applying a large load to the software. .

  Moreover, according to the illuminating device 10 of 1st Embodiment, during a fade-in and fade-out operation | movement, when turning on and off, a user's discomfort can be prevented.

(Second Embodiment)
Next, the illuminating device of 2nd Embodiment which concerns on this invention is demonstrated.
In the following embodiments, components that are the same as those in the first embodiment described above or components that are functionally similar are denoted by the same or corresponding reference numerals in the drawings, and the description thereof is simplified or omitted. To do.

As shown in FIG. 5, in the illumination device 40 according to the second embodiment of the present invention, the control unit 35 sets a normal effective range between time T ₄₁ and time T ₄₂ .
Then, the lighting device 40, the control unit 35, in the off state immediately before the time T ₄₂ (immediately after lighting state), between time T ₄₂ to time T _43, only the direction of increasing the width of the effective range is set large To do.
In the illuminating device 10, the control unit 35 sets a normal effective range after time T ₄₃ .

  According to the illuminating device 40 of the second embodiment, in order to increase the width of the effective range only in the increasing direction, even if external light enters the state immediately before the fluorescent lamp 15 is turned off, the illuminance constant operation that brightens the fluorescent lamp 15 Can be controlled as usual.

(Third embodiment)
Next, the illuminating device of 3rd Embodiment which concerns on this invention is demonstrated.
As shown in FIG. 6, in the lighting device 50 according to the third embodiment of the present invention, when the control unit 35 determines that any one or more of the plurality of fluorescent lamps 15 has reached a state immediately before lighting. The effective range is widened by determining that the target value Sp is substantially coincident with the target value Sp.
Illumination device 50, the control unit 35 has set the scope of normal in between time _{T 51} ~ time _{T 52.}
Then, the illumination device 50, the control unit 35, at time T _52, when it is determined that any one or more of the fluorescent lamp 15 has reached the state immediately before the lighting, to be in substantially coincident state and the target value Sp Judging and extending the effective range.
Illumination device 50, the control unit 35, subsequent point in time _{T 53,} sets the effective range of the normal.

  According to the illuminating device 50 of the third embodiment, the illuminance detected by the illuminance detection unit 21 immediately after the light is turned off is lowered, but the effective range is widened, so that the illuminance is not immediately turned on.

(Fourth embodiment)
Next, the illuminating device of 4th Embodiment which concerns on this invention is demonstrated.
As shown in FIG. 7, in the illumination device 60 according to the fourth embodiment of the present invention, when the control unit 35 determines that the fluorescent lamp 15 has reached a state immediately before it is turned off, the illumination device 60 is substantially in agreement with the target value Sp. Judge that there is, widen the effective range.
When the lighting device 60 determines that any one or more of the fluorescent lamps 15 have reached the state immediately before lighting, the lighting device 60 determines that the target value Sp is substantially in agreement with the target value Sp and widens the effective range.
Illumination device 60, the control unit 35 has set the scope of normal in between time _{T 61} ~ time _{T 62.}
The illumination device 60 includes a control unit 35, at time T _62, when it is determined that any one or more of the fluorescent lamp 15 has reached the state immediately before the lighting, to be in substantially coincident state and the target value Sp Judging and extending the effective range.
Moreover, determining that the illumination device 60, the control unit 35, in the subsequent time T ₆₄ time T _62, when it is determined that the fluorescent lamp 15 has reached the state immediately before turning off is substantially coincident state and the target value Sp And widen the effective range.

  According to the illuminating device 60 of the fourth embodiment, since the width of the effective range is increased at two locations immediately before turning off and immediately before turning on, it is not possible to turn on immediately after turning off, and it is difficult to turn off immediately after turning on.

(Fifth embodiment)
Next, the illuminating device of 5th Embodiment which concerns on this invention is demonstrated.
As shown in FIG. 8, in the illumination device 70 according to the fifth embodiment of the present invention, the control unit 35 determines that any one or more of the two or more fluorescent lamps 15 have reached a state immediately before lighting. When doing so, the effective range is expanded only in one direction.
Lighting device 70, the control unit 35 has set the scope of normal in between time _{T 71} ~ time _{T 72.}
Then, the illumination device 70, the control unit 35, at time T _72, when any one or more of the two or more fluorescent lamps 15 is judged to reach the state immediately before the lighting, the scope widened in one direction Only do.
Illumination device 50, the control unit 35, subsequent point in time _{T 73,} sets the effective range of the normal.

  According to the illuminating device 70 of the fifth embodiment, since the width of the effective range is increased only in one direction, even if the external light is reduced to a state immediately before the fluorescent lamp 15 is turned on, it is possible to always perform a stable illuminance constant operation.

  In the lighting device of the present invention, the housing, the reflector, the cover, the frame, and the like are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

10, 40, 50, 60, 70 Illumination device 14 Fixing and power supply connection part (power supply part)
15 Fluorescent lamp (light source)
16 lighting circuit 21 illuminance detection unit 35 control unit

Claims (6)

Multiple light sources;
A lighting circuit capable of dimming, turning on and off the light output of the light source;
An illuminance detector that detects the reflected light of the illuminated surface of the light source and converts it to a voltage;
A control having an automatic light control function that provides an effective range so that a detection value detected by the illuminance detection unit substantially matches a target value corresponding to a desired brightness, and outputs a light output adjustment, lighting, and extinction signal And
A power supply unit for operating the light source, the lighting circuit, the illuminance detection unit, and the control unit;
When the control unit determines that any one or more of the light sources have reached a state immediately before extinguishing, the lighting device expands the effective range by determining that the control unit is substantially in agreement with the target value. The lighting device according to claim 1.
When the effective range is from a positive value to a negative value, the lighting device that the control unit expands only to the positive value. The lighting device according to claim 1 or 2,
When the control unit determines that any one or more of the light sources have reached a state immediately before lighting, the lighting device expands the effective range by determining that the target value is substantially coincident with the target value. Multiple light sources;
A lighting circuit capable of dimming, turning on and off the light output of the light source;
An illuminance detector that detects the reflected light of the illuminated surface of the light source and converts it to a voltage;
A control having an automatic light control function that provides an effective range so that a detection value detected by the illuminance detection unit substantially matches a target value corresponding to a desired brightness, and outputs a light output adjustment, lighting, and extinction signal And
A power supply unit for operating the light source, the lighting circuit, the illuminance detection unit, and the control unit;
When the control unit determines that any one or more of the light sources have reached a state immediately before lighting, the lighting device expands the effective range by determining that the target value is substantially coincident with the target value. In the illuminating device of Claim 3 or Claim 4,
When the effective range is from a positive value to a negative value, when the control unit determines that any one or more of the light sources has reached a state immediately before lighting, the control unit A lighting device that only expands to value. In the illuminating device of any one of Claim 1 thru | or 5,
Equipped with a function that turns on when fade-in or turns off when fade-out,
An illumination device that sets a state immediately before turning off when the control unit is not performing the fade-in or fade-out operation to a state immediately before turning off.

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