JP2013069554A - Lighting control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting control device which can change an increasing rate of an optical output of a light source in accordance with an output of a human detection sensor.SOLUTION: A lighting control device comprises a lighting circuit 22 for lighting a light source, a human detection sensor 6 for detecting a human body, a control part 15 for lighting the light source when the human body is detected by the human detection sensor 6, and a setting input part 14 to which an instruction of changing a setting is inputted. In this lighting control device, the control part 15 can switch an increasing rate of an optical output when starting to light the light source to a relatively slow rate or a relatively fast rate, in accordance with an input to the setting input part.

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.

JP-A-11-204273

  By the way, as the operation for starting the lighting of the light source, an operation for suppressing the uncomfortable feeling given to the user by gradually increasing the light output of the light source (hereinafter referred to as “low speed switching”), and the light output of the light source. It is conceivable to obtain an illuminance quickly (hereinafter referred to as “high-speed switching”) by instantaneously raising the value.

  When the lighting control device that performs only the low-speed switching and the lighting control device that performs only the high-speed switching are separately manufactured, the usability of the lighting control device is deteriorated. Also, the cost required for switching between an illumination system that performs low-speed switching and an illumination system that performs high-speed switching increases.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide an illumination control device with improved usability.

  The illumination control device of the present invention is connected to a lighting circuit that turns on an electrical light source with a light output according to an input control signal, and a human sensor that detects a human body, and the human sensor detects the human body A control unit that inputs the control signal to turn on the light source to the lighting circuit during a period from when the human detection sensor detects that no human body is detected until a delay time is reached, and a setting change A setting input unit to which the instruction is input, and the control unit changes a rising speed of the light output of the light source when starting the lighting of the light source according to an input to the setting input unit. It is characterized by.

  In the illumination control device, the control unit is also connected to a brightness sensor that detects ambient brightness, and the brightness detected by the brightness sensor is predetermined during a period in which the light source is turned on. Preferably, the control signal is generated so as to maintain the target value.

  According to the present invention, the usability is improved as compared with the case where the increase rate of the light output of the light source cannot be changed.

(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 luminaire 2 includes an electrical light source 21, a communication circuit 23 connected to the signal line 5, and a light source with a light output corresponding to a control signal input via the signal line 5 and the communication circuit 23. And a lighting circuit 22 for lighting 21. 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. 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 a period that is in the existence period P1 and not immediately after the start or immediately before the end, the control unit 15 generates a control signal so as to keep the brightness detected by the brightness sensor 7 at a predetermined target 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.

  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-mentioned increase speed in the low-speed switching mode is, for example, the time taken for the light output to reach the maximum value (that is, the light output when the brightness reaches the above target value in the absence of external light) (hereinafter referred to as the light output) This is called “rising time.”) The speed is such that Tu is 4 seconds. In addition, the decrease rate in the low-speed switching mode is, for example, until the decrease in the light output from the state where the light output is the above maximum value (that is, there is no external light and the light output is stable). Such a time (hereinafter referred to as “decrease time”) Td is set to a speed of 30 seconds. 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.

  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.

  According to the above configuration, the usability is improved as compared with the case where the above-described ascending speed cannot be changed.

  Note that the switching of the ascending speed and the descending speed may be performed in three or more stages or in a non-stage instead of the above two stages.

  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)

Connected to a lighting circuit that lights an electrical light source with a light output according to an input control signal and a human sensor that detects a human body, and after the human body is detected by the human sensor, the human detection sensor A control unit that inputs the control signal to turn on the light source in the lighting circuit in a period until the delay time reaches a delay time in which a human body is not detected;
A setting input unit for inputting a setting change instruction,
The said control part changes the raise speed | rate of the light output of the said light source at the time of starting lighting of the said light source according to the input to the said setting input part, The illumination control apparatus characterized by the above-mentioned. The control unit is also connected to a brightness sensor that detects ambient brightness, and maintains the brightness detected by the brightness sensor at a predetermined target value during a period in which the light source is turned on. The illumination control device according to claim 1, wherein the control signal is generated at a time.

Images