Lighting device and lighting control system

Abstract

To provide a lighting device and a lighting control system in which the lighting device does not require an AC / DC circuit for human sensors in order for downsizing of a human sensor unit and reduction of power consumption.SOLUTION: A lighting device comprises a light source 8, an ignition device 7 for igniting the light source, a human sensor unit 2 having a human sensor 13, and a control circuit 12 for controlling the ignition device 7 in accordance with a signal from the human sensor 13. The ignition device 7 includes an AC / DC circuit for converting a commercial power supply 9 to a control power supply, and the human sensor unit 2 includes a DC / DC circuit 10 for generating a power supply from the control power supply. The control circuit 12 includes a control signal input part 16 which receives a control signal from the outside and controls the ignition device 7 in accordance with the signal of the control signal input part 16. The control circuit 12 executes a process of storing a dimming rate in accordance with a signal from the human sensor 13 and a process of comparing a dimming rate that corresponds to the signal accepted by the control signal input part 16 with the stored dimming rate, and determines a dimming rate with which to control the ignition device 7, on the basis of the comparison result.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a lighting device and a lighting control system that can control the lighting of a light source and can communicate with the outside to control the lighting. [Background technology]

[0002] Patent Document 1 discloses the configuration of a lighting control system that includes a lighting fixture equipped with a motion sensor. This motion sensor is generally driven and its communication signal is generated using power from a commercial power source. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5335320 Summary of the Invention [Problem to be solved by the invention]

[0004] However, this configuration requires an AC / DC circuit inside the unit containing the motion sensor. This creates problems such as preventing miniaturization of the motion sensor and resulting in excess power consumption. In order to solve the above problems, the present disclosure aims to provide a lighting device in which an AC / DC circuit is not required for the motion sensor. [Means for solving the problem]

[0005] The lighting device disclosed herein includes a light source, a lighting device that turns on the light source, a motion sensor unit with a motion sensor, and a control circuit that controls the lighting device in response to a signal from the motion sensor. The lighting device includes an AC / DC circuit that converts commercial power into a control power source, and the motion sensor unit includes a DC / DC circuit that generates power from the control power source and is driven by that power source. The control circuit has a control signal input unit that accepts control signals from an external source and is capable of controlling the lighting device in response to the signal from the control signal input unit. The control circuit is configured to store a dimming ratio to be controlled in response to the signal from the motion sensor, compare the dimming ratio corresponding to the signal accepted by the control signal input unit with the stored dimming ratio, and determine the dimming ratio to control the lighting device based on the result of the comparison. The process of determining the dimming rate for controlling the lighting device includes a process of determining the presence or absence of a person, and in the case of a presence determination, a process of comparing the set value of the control signal with the set value during presence stored in the control circuit, a process of selecting the set value during presence when the set value during presence is greater than or equal to the set value of the control signal, a process of selecting the set value of the control signal when the set value during presence is less than the set value of the control signal, and in the case of an absence determination, a process of comparing the set value of the control signal with the set value during absence stored in the control circuit, a process of selecting the set value during absence when the set value during absence is greater than or equal to the set value of the control signal, and a process of selecting the set value of the control signal when the set value during absence is less than the set value of the control signal. It is characterized by: [Effects of the Invention]

[0006] The configuration of the present disclosure enables power supply from the lighting device to the control unit and lighting control by a control circuit driven by that power supply. In other words, since the human sensor does not require an AC / DC circuit, the human sensor unit can be made smaller and no extra power consumption is generated. [Brief explanation of the drawings]

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

[0008] Embodiment 1 1 shows the configuration of a lighting system according to a first embodiment of the present disclosure. The lighting system includes a lighting device 1. The lighting device 1 includes a motion sensor unit 2 and a lighting fixture 3. The lighting device 1 is connected to lighting fixtures 4 and 5 via signal lines. A user can change dimming settings using a setting remote control 6.

[0009] 2 is a block diagram showing the configuration of lighting device 1. This lighting device includes a lighting device 7, a light source 8, and a motion sensor unit 2. Lighting device 1 is supplied with power from a commercial power supply 9. Although not shown, the power is supplied to lighting device 7 and converted to control power supply VDD1 by an AC / DC circuit. Lighting device 7 uses VDD1 as a control power supply and lights up light source 8 by controlling the lighting circuit.

[0010] The lighting device 7 also simultaneously supplies VDD1 to the motion sensor unit 2. The DC / DC circuit 10 converts VDD1 to VDD2 and supplies it to the control power supply circuit 11. Although not shown, the DC / DC circuit 10 is a switching-type step-down DC / DC converter composed of switching transistors, transformers, diodes, etc. The control power supply circuit 11 generates Vcc from VDD2.

[0011] The control circuit 12 operates on Vcc. The human presence sensor 13 outputs a Hi signal when it determines whether someone is present, and a Low signal when it determines someone is absent, to the control circuit 12. The control circuit 12 operates on Vcc and determines the PWM signal to be output depending on the presence or absence determination result of the human presence sensor 13.

[0012] PWM signal generation circuit 14 outputs the PWM signal determined by control circuit 12 via VDD2 to lighting fixture 4. At the same time, signal conversion circuit 15 receives the same PWM signal, converts it into a UART signal, and outputs it to lighting device 7. Lighting device 7 controls light source 8 at a dimming rate corresponding to the output signal.

[0013] For example, when the human presence sensor 13 determines that a person is present, the control circuit 12 outputs a PWM signal with a duty cycle of 5%. In response to this signal, the lighting device 7 turns on the lighting fixtures 4 and 5 at 100% brightness. At the same time, the lighting device 7 also turns on the lighting fixture 3 itself at 100% brightness. On the other hand, when the human presence sensor 13 determines that no person is present, the control circuit 12 outputs a PWM signal with a duty cycle of 90%. In response to this signal, the lighting device 7 turns on the lighting fixtures 4 and 5 at 5% brightness. At the same time, the lighting device 7 also turns on the lighting fixture 3 itself at 5% brightness.

[0014] The control signal input unit 16 processes the PWM signal from the outside. In the first embodiment, since there is only one human presence sensor, no signal is input from the outside.

[0015] The remote control signal receiving unit 17 receives the remote control signal from outside the lighting fixture. The control circuit 12 stores the set value specified by the signal. The following values are stored as set values: (1) the dimming rate when the human presence sensor is present, (2) the dimming rate when the human presence sensor is absent, and (3) the time until the change from present to absent is determined.

[0016] The human presence sensor unit 2 and the lighting device 7 are connected by a power line via CN18 and CN19. Since this connection includes a harness with a connector, etc., it can be easily detached and attached. Also, for a series of control signals, not only PWM signals but also UART signals and DALI signals can be used.

[0017] With the above configuration, it becomes possible to supply DC power from the lighting device 7 to the human presence sensor unit 2 and drive the human presence sensor unit 2 using it. Since an AC / DC circuit is no longer required, the human presence sensor unit 2 can be downsized accordingly, and power consumption can also be reduced. Also, by moving the control circuit 12 from the lighting fixture 3 to the human presence sensor unit 2, the lighting fixture 3 can be downsized.

[0018] The lighting fixtures 4 and 5 of this embodiment have the same configuration as the lighting fixture 3. Since the control circuit 12 of the lighting device 1 performs the lighting control for each of them, there is no need to have a control circuit. Therefore, the lighting fixtures 4 and 5 can also be made smaller than conventional lighting fixtures.

[0019] Figure 3 is a flowchart for explaining the processing of the control circuit. In this embodiment, the control circuit 12 changes the dimming set value according to the flowchart shown in Figure 3.

[0020] First, the control circuit 12 checks for the presence of a setting request in step 100. Specifically, it determines whether a signal has been received from the setting remote control 6. If there is no request, the process is completed. If there is a request, the process proceeds to step 102.

[0021] In step 102, it is determined whether the change request is for the set value when the presence of the human sensor 13 is detected. This is also determined from the content of the signal received from the setting remote control 6. If it is determined that a change is requested for the presence detection, the process proceeds to step 104, where the stored set value at the time of presence detection is changed and the process is completed. If it is determined that a change is requested for the absence detection, the process proceeds to step 106, where the stored set value at the time of absence detection is changed and the process is completed.

[0022] By this process, the control circuit 12 stores the set value according to the presence or absence detection of the human sensor 13. And when a signal is received from the human sensor 13, it outputs a corresponding signal to control the brightness of the lighting fixture.

[0023] Embodiment 2 Figure 4 shows the configuration of the lighting system according to Embodiment 2 of the present disclosure. In Figure 4, components that are the same as or corresponding to the components in Embodiment 1 are given common reference numerals, and their descriptions are omitted or simplified.

[0024] The lighting system of this embodiment has the same configuration as that of the first embodiment, except that it includes a lighting device 20. The lighting device 20 is connected to the lighting device 1 and the lighting fixture 5 via signal lines. The lighting device 20 includes a human presence sensor unit 21 and a lighting fixture 22. Also, the user can change the setting values related to dimming for the lighting device 20 in addition to the lighting device 1 by using the setting remote controller 6.

[0025] The lighting device 20 has the same configuration as the lighting device 1 shown in FIG. 2. Therefore, the lighting device 20 can also change the setting values of dimming when present and absent by the processing of the flowchart shown in FIG. 3. Also, the lighting device 20 has a control signal input unit 16, similar to the lighting device 1. The control circuit 12 compares the stored PWM signal when present or absent with the signal received by the control signal input unit 16, and determines the control signal to be output. Details will be described with reference to FIG. 5.

[0026] Since the configuration of this embodiment also does not require an AC / DC circuit as in the first embodiment, the human presence sensor unit can be miniaturized accordingly, and the power consumption can also be suppressed. Also, by moving the control circuit from the lighting fixture to the human presence sensor unit, the lighting fixture can be miniaturized.

[0027] FIG. 5 is a flowchart for explaining the dimming rate determination process implemented in the second embodiment of the present disclosure. This process is performed in both the lighting devices 1 and 20. Hereinafter, the processing flow of the control circuit 12 included in the lighting device 1 will be described with reference to FIG. 5. Through this, it shows what kind of processing is performed when the lighting system has two human presence sensors.

[0028] First, the control circuit 12 determines whether a person is present or absent in step 108. Specifically, it receives a signal for determining presence or absence from the human presence sensor of its own device.

[0029] In the case of a presence determination, it proceeds to step 110. In step 110, the PWM signal received from the human presence sensor unit 21 is compared with the stored setting value when present by the control circuit 12.

[0030] When the on - time set value is greater than or equal to the received PWM signal, it can be determined that the illuminance required at the time of the lighting device 1 is higher than the illuminance required for the lighting device 20. In this case, proceed to step 112 and select the on - time set value. Specifically, hold the on - time set value of the control circuit 12. Then, by outputting a corresponding control signal, the lighting fixtures 3, 4, 5, 22 are lit at the dimming rate at the time of the lighting device 1. The fail - safe of the lighting fixtures is generally in the lit state, but by this process, all the lighting fixtures can be lit at the higher dimming rate, so the lighting system can be operated more safely.

[0031] When the on - time set value is less than the received PWM signal, it can be determined that the illuminance required at the time of the lighting device 1 is lower than the illuminance required for the lighting device 20. In this case, proceed to step 114 and select the set value of the received PWM signal. Specifically, overwrite the set value in the control circuit 12 with the set value of the received PWM signal. Then, by outputting a corresponding control signal, the lighting fixtures 3, 4, 5, 22 are lit at the dimming rate corresponding to the PWM signal received from the lighting device 20. The fail - safe of the lighting fixtures is generally in the lit state, but by this process, all the lighting fixtures can be lit at the higher dimming rate, so the lighting system can be operated more safely.

[0032] If the absence determination is made in step 108, proceed to step 116. In step 116, compare the PWM signal received from the human - presence sensor unit 21 with the off - time set value stored in the control circuit 12.

[0033] If the vacant setting value is greater than or equal to the received PWM signal, it can be determined that the illuminance required for lighting device 1 when vacant is higher than the illuminance required for lighting device 20. In this case, the process proceeds to step 118, where the vacant setting value is selected. Specifically, the vacant setting value is stored in control circuit 12. Then, by outputting a control signal corresponding to the vacant setting value, lighting fixtures 3, 4, 5, and 22 are turned on at the dimming rate for lighting device 1 when vacant. Although the failsafe for a lighting fixture is typically the on state, this process allows all lighting fixtures to be turned on at the higher dimming rate, thereby enabling safer operation of the lighting system.

[0034] If the vacant-room setting is smaller than the received PWM signal, it can be determined that the illuminance required for vacant-room lighting device 1 is lower than the illuminance required for lighting device 20. In this case, the process proceeds to step 120, where the setting value of the received PWM signal is selected. Specifically, the setting value in control circuit 12 is overwritten with the setting value of the received PWM signal. Then, by outputting a corresponding control signal, lighting fixtures 3, 4, 5, and 22 are turned on at a dimming rate corresponding to the PWM signal received from lighting device 20. This also means that even if lighting device 1 determines that no one is vacant, lighting device 20 will turn on the lighting fixtures at the dimming rate determined by the vacant-room setting. Furthermore, although the failsafe for lighting fixtures is generally the on state, this process allows all lighting fixtures to be turned on at the higher dimming rate, thereby enabling safer operation of the lighting system.

[0035] This process allows lighting systems with multiple motion sensors to turn on the lights when any of the motion sensors detects the presence of a person. Furthermore, if the dimming rates set for the motion sensors differ when detecting presence or absence, the highest illuminance setting will always be selected, ensuring the safety of the end user's work environment through the fail-safe function of the lighting fixtures.

[0036] In this embodiment, when comparing the dimming rates in the process of FIG. 5, the one with the higher illuminance is selected, but the process may be such that the one with the lower illuminance is selected. [Explanation of symbols]

[0037] 1 Lighting device, 2 Human presence sensor unit, 3 Lighting fixture, 4 Lighting fixture, 5 Lighting fixture, 7 Lighting control device, 8 Light source, 9 Commercial power supply, 10 DC / DC circuit, 12 Control circuit, 13 Human presence sensor, 16 Control signal input section, 20 Lighting device, 21 Human presence sensor unit, 22 Lighting fixture

Claims

1. A light source, A lighting device for lighting the light source, A human presence sensor unit having a human presence sensor, A control circuit for controlling the lighting of the lighting device according to a signal from the human presence sensor, The lighting device includes an AC / DC circuit for converting a commercial power supply into a control power supply, The human presence sensor unit includes a DC / DC circuit for generating a power supply from the control power supply, and is driven by the power supply, The control circuit, Has a control signal input unit for receiving an external control signal, Is capable of controlling the lighting device according to a signal of the control signal input unit, A process of storing a dimming rate controlled according to a signal from the human presence sensor, A process of comparing a dimming rate according to a signal received by the control signal input unit with the stored dimming rate, A process of determining a dimming rate for controlling the lighting device based on a result of the comparison Is configured to execute, The process of determining a dimming rate for controlling the lighting device, A process of determining the presence or absence of a person, In the case of presence determination, a process of comparing a set value of the control signal with a set value during presence stored in the control circuit, When the set value during presence is greater than or equal to the set value of the control signal, a process of selecting the set value during presence, When the set value during presence is less than the set value of the control signal, a process of selecting the set value of the control signal, In the case of absence determination, a process of comparing a set value of the control signal with a set value during absence stored in the control circuit, When the set value during absence is greater than or equal to the set value of the control signal, a process of selecting the set value during absence, When the set value during absence is less than the set value of the control signal, a process of selecting the set value of the control signal, A lighting device, characterized by comprising the above.

2. The lighting device according to claim 1, wherein the human presence sensor unit is detachably connected to the lighting device.

3. A lighting device according to any one of claims 1 to 2, And another lighting fixture different from the lighting device, The control circuit is provided in the human presence sensor unit, The other lighting fixture is controlled to light according to a control signal from the control circuit A lighting system, characterized by the above.

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