JP2013093168A - Illumination controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination controller to stabilize a luminous flux from a light source.SOLUTION: Depending on the input to a setting input section, the operation mode is switchable between a slow-speed switching mode in which raising speed of the light output at turning on the light source is relatively slow as shown in Fig.1(a) and a high speed switching mode in which the raising speed is relatively fast as shown in Fig.1(b). Only when the operation mode is the slow-speed switching mode, the light output is controlled so that the output from a brightness sensor is constant; and when the operation mode is the high speed switching mode, the output from the brightness sensor is not reflected to the control. Compared to the case when the output from the brightness sensor is reflected to the control in the high speed switching mode, the luminous flux from the light source immediately after starting the illumination is more stable.

Description

  The present invention relates to a lighting control device.

  Conventionally, there has been provided an illumination control device that is connected to a lighting circuit that turns on an electrical light source and a human sensor that detects a human body, and controls the lighting circuit according to the output of the human sensor (for example, Patent Document 1). The control according to the output of the human sensor is generally one that starts turning on the light source when a human body is detected by the human sensor in a state where the light source is turned off.

  In addition, an illumination control device is provided that is connected to a brightness sensor that detects the brightness of a location illuminated by the light source and feedback-controls the lighting circuit so as to maintain the brightness detected by the brightness sensor constant. Has been.

JP-A-11-204273

  When a fluorescent lamp is used as the light source, the luminous flux of the fluorescent lamp depends on the temperature, and the temperature increases rapidly immediately after the start of lighting (that is, immediately after the start of discharge). In some cases, the light flux becomes unstable due to the feedback control.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide an illumination control device in which the light flux of the light source is less likely to become unstable.

  An illumination control device according to the present invention includes a lighting circuit that turns on an electrical light source with a light output according to an input control signal, a human sensor that detects a human body, and a brightness sensor that detects ambient brightness. The control signal for turning on the light source during a period from when a human body is detected by the human sensor until a delay time has elapsed until a human body is not detected by the human sensor. A control unit that inputs to the lighting circuit; and a setting input unit that inputs a setting change instruction. The control unit sets an operation mode according to an input to the setting input unit and starts lighting the light source. The operation mode is switched to either the low speed switching mode in which the rising speed of the light output immediately after is relatively low or the high speed switching mode in which the rising speed is higher than the low speed switching mode. When a switching mode, characterized in that not reflected output of the brightness sensor to the control signal.

  In this invention, the setting input unit accepts an input for setting whether or not the type of the light source is a fluorescent lamp, in addition to an instruction to change the setting of the operation mode, and the control unit includes: In the period when the type of the light source is set not to be a fluorescent lamp in the setting input unit, the output of the brightness sensor is reflected in the control signal even if the operation mode is the high-speed switching mode. Is desirable.

  According to the present invention, compared with the case where the output of the brightness sensor is reflected in the operation in the high-speed switching mode, the luminous flux of the light source immediately after the start of lighting is less likely to become unstable.

(A) and (b) show an example of the change of the light output in the embodiment of this invention in the state without external light, (a) shows a low-speed switching mode, (b) shows a high-speed switching mode, respectively. It is explanatory drawing which shows an example of a use condition same as the above. It is a block diagram which shows the same as the above.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  As shown in FIGS. 2 and 3, the illumination control device 1 according to the present embodiment includes a plurality of illumination devices 2 (only one is shown in FIG. 3) and a plurality of sensor devices (only one is shown in FIG. 3). 3 and the wired remote controller 4 are connected to each other via, for example, a two-wire signal line 5. For example, a commercial power supply is used as the power supply for each of the above devices 1 to 4.

  Each of the lighting fixtures 2 has an optical output indicated by an electric light source 21, a communication circuit 23 connected to the signal line 5, and a control signal input via the signal line 5 and the communication circuit 23. And a lighting circuit 22 for lighting the light source 21 with the combined luminous flux. As the control signal, for example, a rectangular wave (so-called PWM signal) having an on-duty corresponding to the instructed light output, a voltage signal having a voltage value in accordance with the instructed light output, or the like can be considered. The communication circuit 23 is a circuit that performs impedance matching, noise removal, and the like between the lighting circuit 22 and the signal line 5, and such a communication circuit 23 can be realized by a known electronic circuit. As the light source 21, for example, a fluorescent lamp or a light emitting diode can be used. When a fluorescent lamp is used as the light source 21, a known electronic ballast can be used as the lighting circuit 22. When a light emitting diode is used as the light source 21, a known DC power supply circuit is used as the lighting circuit 22. Can be used. Further, the light output of the light source 21 is changed by changing the input power to the light source 21 or changing the on-duty of intermittent lighting with a cycle sufficiently short that it is not recognized by human eyes as blinking. It can be realized by appropriate means according to the above. In any of the above cases, the luminaire 2 can be realized by a well-known technique, and thus detailed illustration and description thereof will be omitted.

  The illumination control device 1 includes a human sensor 6 that detects a human body and a brightness sensor 7 that detects ambient brightness. The human sensor 6 determines the presence or absence of a human body within a predetermined detection range and generates an electric signal having a signal level corresponding to the determination result. For example, the human sensor 6 can be realized by a known technique using a pyroelectric sensor. it can. The brightness sensor 7 generates an electrical signal corresponding to the amount of incident light, and can be realized by a known technique using, for example, a photodiode.

  The sensor device 3 includes a sensor (human sensor 6 or brightness sensor 7) similar to that included in the illumination control device 1 and a communication circuit (the sensor circuit 6 or a brightness sensor 7) that transmits the output of the sensor to the illumination control device 1 via the signal line 5. (Not shown). When a plurality of sensor devices 3 are connected to a common signal line 5 as shown in FIG. 2, it is desirable that the communication circuit is compatible with a known multiplex transmission technique.

  The illumination control device 1 and the sensor device 3 are each embedded in a ceiling surface (not shown), and the detection range of the human sensor 6 is formed below the illumination control device 1 and the sensor device 3. The brightness sensor 7 generates an output corresponding to the amount of light incident from below.

  The wired remote controller 4 has an operation means such as a push button that accepts an operation input, and transmits an electrical signal corresponding to the operation input accepted by the operation means to the illumination control device 1 via the signal line 5. Since such a wired remote controller 4 can be realized by a well-known technique, detailed illustration and description thereof will be omitted. Although only one wired remote controller 4 is illustrated, a plurality of wired remote controllers 4 may be connected to the illumination control device 1 using a multiplex transmission technique or a plurality of signal lines 5. Further, when the dedicated signal line 5 is used for connection, a circuit for multiplex transmission is not necessary, so that a simple switch can be used as the wired remote controller 4.

  Furthermore, the illumination control device 1 can also transmit and receive wireless signals to and from the wireless remote controller 8. The wireless remote controller 8 has an operation means such as a push button for receiving an operation input, and transmits a radio signal corresponding to the operation input received by the operation means. As the wireless signal medium, for example, a radio wave transmitted / received by an antenna or an optical signal transmitted by a light emitting element such as a light emitting diode and received by a light receiving element such as a photodiode can be used. A battery is used as a power source for the wireless remote controller 8. Since the wireless remote controller 8 as described above can be realized by a known technique, detailed illustration and description thereof will be omitted.

  In addition to the human sensor 6 and the brightness sensor 7, the lighting control device 1 is wired via the signal line 5 and the control output unit 11 connected to each lighting fixture 2 via the signal line 5. An instruction input unit 12 connected to the remote controller 4, a sensor connection unit 13 connected to each sensor device 3 via the signal line 5, a setting input unit 14 for receiving a radio signal from the wireless remote controller 8, and each of the above units The control part 15 which produces | generates the control signal according to the input from and transmits to the lighting fixture 2 via the control output part 11 is provided. Since each of the above parts can be realized by a well-known electronic circuit, detailed illustration and description thereof will be omitted.

  Hereinafter, the operation of the control unit 15 according to the output of the human sensor 6 and the output of the brightness sensor 7 will be specifically described. In addition to the above-described operation, the control unit 15 turns on or off the light source 21 with a constant light output regardless of the output of the human sensor 6 or the output of the brightness sensor 7 in accordance with an input from the wired remote controller 4 or the like. It is also possible to operate. Each lighting fixture 2 is associated with at least one human sensor 6 and one brightness sensor 7 in advance, for example, for each connected signal line 5, and the correspondence relationship is controlled by the control unit 15. Is remembered. As said correspondence, for example, the human sensor 6 and the brightness sensor 7 which are arrange | positioned nearest about each lighting fixture 2 are matched, respectively. Furthermore, the control unit 15 reflects the outputs of the human sensor 6 and the brightness sensor 7 only in the control of the corresponding lighting fixture 2. However, in the following, for the sake of simplicity, a case will be described in which there is one lighting fixture 2, one human sensor 6, and one brightness sensor 7.

  As shown in FIGS. 1A and 1B, the control unit 15 has reached a predetermined delay time Ts from the time t1 when the human sensor is detected by the human sensor 6 until the human sensor 6 detects no human body. During the period up to time t2 (hereinafter referred to as “existing period”) P1, the light source 21 is turned on. In the drawing, the timing t3 indicates the latest timing among the timings when the human sensor 6 is switched from the state where the human body is detected to the state where the human body is not detected.

  In addition, a period until the human body is detected by the human sensor 6 after the state in which the human body is not detected by the human sensor 6 reaches the delay time Ts (or after the power is turned on) (hereinafter, “absence” The light source 21 is turned off during P2. In the absence period P2, instead of turning off the light source 21, the light source 21 is turned on with a light output lower than the existing period P1 (light output equal to or lower than the minimum light output possible in the existing period P1). Also good.

  Here, in accordance with the input to the setting input unit 14, the control unit 15 increases the light output rate of the light source 21 at the start of the existence period P1 (that is, at the start of lighting of the light source 21) and the end of the existence period. In other words, the setting of the light output reduction rate of the light source 21 at the end of lighting of the light source 21 is changed. Specifically, in accordance with the input to the setting input unit 14, the control unit 15 changes the operation mode to a low-speed switching mode and a high-speed switching mode in which the rising speed and the lowering speed are higher than those in the low-speed switching mode. It can be switched to either.

  The above rising speed in the low speed switching mode is, for example, a speed at which the time required for the light output to reach the maximum value (hereinafter referred to as “rising time”) Tu is 4 seconds. In the low-speed switching mode, for example, the above-described decrease rate is 30 for the time required to complete the decrease in the light output from the state where the light output is the maximum value (hereinafter referred to as “decrease time”) Td. The speed is set to be seconds.

  On the other hand, the ascending speed in the high-speed switching mode is, for example, as high as possible. In addition, the decrease speed in the high-speed switching mode is set to a speed at which the decrease time Td is 3 seconds, for example.

  For example, when the control signal is a rectangular wave and the light source 21 is turned on with the light output corresponding to the on-duty of the control signal to which the lighting fixture 2 is input, the gradual change in the light output is caused by the control unit 15. This is achieved by gradually changing the on-duty of the control signal generated by a plurality of times. Further, the change of the rising speed and the decreasing speed is achieved by changing the magnitude of the change width of the on-duty per one time, changing the number of changes of the on-duty, and changing the time interval of the on-duty change.

  In the present embodiment, whether or not the output of the brightness sensor 7 is reflected in the operation is switched according to the operation mode. Specifically, the control unit 15 reflects the output of the brightness sensor 7 in the operation in the low speed switching mode, and does not reflect the output of the brightness sensor 7 in the operation in the high speed switching mode.

  When the output of the brightness sensor 7 is reflected in the operation, the control unit 15 sets the brightness detected by the brightness sensor 7 to a predetermined target during the existing period P1 and not immediately after the start or immediately before the end. A control signal is generated so as to keep the value. That is, when the brightness detected by the brightness sensor 7 is higher than the target value, a control signal for reducing the light output is generated, and when the brightness is lower than the target value, the light output is increased. A control signal is generated. If the output of the brightness sensor 7 is used as described above, the light output is reduced to reduce power consumption when light from a light source such as the sun other than the luminaire 2 (so-called external light) is present, while ensuring illuminance. Can be suppressed. Here, the time until the light output is stabilized after the start of the existence period P1 becomes longer as the external light is smaller. The delay time Ts is the sum of the fixed basic delay time Ts1 and the time until the decrease in the light output at the above-described decrease speed (the decrease time Td when there is no outside light). The less light, the longer.

  According to the above configuration, in the high-speed switching mode, at least control for reducing the light output is not performed because the output of the brightness sensor 7 is not reflected in the operation. Therefore, compared with the case where the output of the brightness sensor 7 is reflected in the operation in the high-speed switching mode, the light flux of the light source 21 immediately after the start of lighting is less likely to become unstable.

  By the way, as described above, the luminous flux may become unstable immediately after the start of lighting, only when a fluorescent lamp is used as the light source 21, and when a light emitting diode or the like is used as the light source 21. Does not cause the above problems. Therefore, the setting input unit 14 also receives an input for setting whether or not the type of the light source 21 is a fluorescent lamp, and the control unit 15 is set in the setting input unit 14 so that the type of the light source 21 is not a fluorescent lamp. During this period, the output of the brightness sensor 7 may be reflected in the control signal as described above even if the operation mode is the high-speed switching mode. In this case, the output of the brightness sensor 7 is not reflected in the control signal only when the type of the light source 21 is a fluorescent lamp and is in the high-speed switching mode. In other cases, the output of the brightness sensor 7 is not reflected in the control signal. Will be reflected.

  The setting input unit 14 accepts a direct operation input by an operation means (not shown) such as a dip switch in place of or in addition to the one that receives the radio signal from the radio remote controller 8 as described above. Alternatively, a device to which the signal line 5 is connected may be provided. That is, the input to the setting input unit 14 may be a wireless signal, an electric signal, or a direct operation input.

DESCRIPTION OF SYMBOLS 1 Illumination control apparatus 6 Human sensor 7 Brightness sensor 14 Setting input part 15 Control part 21 Light source 22 Lighting circuit

Claims (2)

The human sensor connected to a lighting circuit for lighting an electric light source with a light output according to an input control signal, a human sensor for detecting a human body, and a brightness sensor for detecting ambient brightness A control unit that inputs the control signal for turning on the light source to the lighting circuit during a period from when the human body is detected by the human detection sensor to when the human detection sensor does not detect the human body until a delay time reaches a delay time; ,
A setting input unit for inputting a setting change instruction,
The control unit, according to an input to the setting input unit, the operation mode is a low-speed switching mode that relatively lowers the rising speed of the light output immediately after starting the lighting of the light source, and the low-speed switching mode than the low-speed switching mode A lighting control device that switches to one of a high-speed switching mode with a high ascending speed, and that does not reflect the output of the brightness sensor in the control signal when the operation mode is the high-speed switching mode. The setting input unit accepts an input for setting whether or not the type of the light source is a fluorescent lamp, in addition to an instruction to change the setting of the operation mode.
The control unit controls the output of the brightness sensor during the period when the type of the light source is set not to be a fluorescent lamp in the setting input unit, even if the operation mode is the high-speed switching mode. The illumination control apparatus according to claim 1, wherein the illumination control apparatus reflects the signal.

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