JP7507428B2 - Lighting system, lighting fixture, and lighting system - Google Patents

Description

This disclosure relates to lighting systems, lighting fixtures, and lighting systems.

As shown in Patent Document 1, there is a conventional lighting control program update system that updates the control programs of lighting fixtures in a lighting system that collectively manages multiple lighting fixtures. The lighting control program update system includes multiple lighting fixtures and an update machine. The update machine is used to update the control programs of the multiple lighting fixtures. The update machine broadcasts an update command for the control programs to the multiple lighting fixtures. The multiple lighting fixtures update their respective control programs in response to the update command for the control programs.

The update machine communicates wirelessly using radio waves and outputs update commands to the lighting fixtures via wireless communication. The update machine also distributes update programs for the control programs to the lighting fixtures all at once.

JP 2019-125536 A

When updating the software (program) of lighting fixtures used in the lighting control program update system described above, the dimming level may become unstable, which may cause discomfort to people within the illuminated range.

The objective of this disclosure is to provide a lighting system, lighting fixture, and lighting system that can reduce the discomfort felt by people when updating software.

A lighting system according to an aspect of the present disclosure includes a lighting device, a first acquisition unit, a storage unit, a signal generation unit, a lighting control unit, a second acquisition unit, and an update unit. The lighting device turns on a lighting load. The first acquisition unit receives a control signal indicating a state of the lighting load. The storage unit stores software for generating a dimming signal indicating a dimming level of the lighting load based on the control signal. The signal generation unit generates the dimming signal based on the control signal by executing the software read from the storage unit. The lighting control unit controls the lighting device based on the dimming signal. The second acquisition unit receives update data for updating the software. The update unit updates the software based on the update data. When the second acquisition unit receives the update data while the lighting control unit is adjusting the dimming level to a first level based on the dimming signal, the lighting control unit adjusts the dimming level to a predetermined second level. The update unit updates the software based on the update data when the dimming level is the second level. When the second acquisition unit receives the update data while the lighting control unit is adjusting the dimming level to the first level, the lighting control unit performs fade control to gradually change the dimming level from the first level to the second level at a predetermined time change rate. When the dimming level reaches the second level, the signal generation unit stops outputting the dimming signal in accordance with the software update, and the lighting control unit controls the lighting device so that the dimming level is maintained at the second level unless the dimming signal is input.

A lighting fixture according to one aspect of the present disclosure includes the lighting system described above, a lighting load that is turned on by the lighting system, and a fixture body that supports at least the lighting load.

A lighting system according to one aspect of the present disclosure includes a plurality of lighting fixtures and a parent unit that transmits the update data to at least one of the plurality of lighting fixtures, each of which is the lighting fixture described above.

As described above, the present disclosure has the effect of reducing the sense of discomfort felt by people when updating software.

FIG. 1 is a block diagram showing a lighting system according to an embodiment. FIG. 2 is a block diagram showing the lighting system of the above lighting fixture. FIG. 3 is a time chart of the software update process in the lighting system. FIG. 4 is a block diagram showing a first modified example of the lighting system. FIG. 5 is a block diagram showing a lighting system for the above lighting fixture. FIG. 6 is a block diagram showing a second modified example of the lighting system. FIG. 7 is a plan view showing an arrangement of lighting fixtures in a fifth modified example of the lighting system. FIG. 8 is a block diagram showing a seventh modified example of the lighting system. FIG. 9 is a block diagram showing the lighting system of the above lighting fixture. FIG. 10 is a perspective view showing a lighting fixture according to the eighth modified example of the above embodiment.

The following embodiments generally relate to lighting systems, lighting fixtures, and lighting systems. More specifically, they relate to lighting systems, lighting fixtures, and lighting systems that have a software update function. Note that the following embodiments are merely examples of embodiments of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

The lighting system, lighting fixture, and lighting system of the embodiment are primarily used in offices, factories, stores, or residences. The residence may be either a detached house or an apartment building.

(Embodiment)
(1) Overview of the Lighting System Fig. 1 shows the configuration of a lighting system 1 according to the present embodiment. The lighting system 1 includes a master unit 2, a plurality of communication terminals 3, and a plurality of lighting fixtures 4.

Each of the multiple communication terminals 3 constitutes a child device for the parent device 2. The parent device 2 and the communication terminals 3 are connected to the same communication line L1. The parent device 2 and each of the multiple communication terminals 3 are configured to be able to communicate with each other via the communication line L1. The parent device 2 can transmit wired signals to each of the multiple communication terminals 3 via the communication line L1, and can receive wired signals from each of the multiple communication terminals 3 via the communication line L1.

The lighting fixture 4 includes a lighting system 40 and a lighting load 41. The lighting system 40 turns on the lighting load 41, and the turned-on lighting load 41 irradiates light to the illumination range 6. Furthermore, the lighting fixture 4 has a wireless communication function, and the lighting fixture 4 can be controlled by wireless signals.

(2) Block Configuration of Lighting Fixture The lighting fixture 4 includes a lighting system 40 and a lighting load 41. The lighting system 40 includes a lighting device 42, a lighting control unit 43, and a dimming module 44, as shown in FIG.

The lighting load 41 includes, for example, a plurality of LEDs (Light Emitting Diodes) as a plurality of solid-state light-emitting elements. Note that the lighting load 41 is not limited to a configuration having LEDs as solid-state light-emitting elements. The lighting load 41 may include other solid-state light-emitting elements, such as organic electroluminescence (OEL) or semiconductor laser diodes (Laser Diodes, LD). The number of solid-state light-emitting elements is not limited to a plurality, and may be one. The electrical connection relationship of the plurality of solid-state light-emitting elements is a series connection, but is not limited to this connection relationship. The electrical connection relationship of the plurality of solid-state light-emitting elements may be a parallel connection, or a connection relationship that combines a series connection and a parallel connection.

The lighting device 42 receives input power from the external power source 9 and supplies lighting power to the lighting load 41. The lighting device 42 includes, for example, at least one of a step-up chopper circuit, a step-down chopper circuit, and a step-up/step-down chopper circuit. The external power source 9 is, for example, a commercial power system or a storage battery.

The lighting control unit 43 controls the lighting device 42 based on a turn-on signal, a turn-off signal, and a dimming signal described below, to switch the lighting load 41 on and off, and to change the dimming level of the lighting load 41. The turn-on signal is a signal that instructs the lighting load 41 to be turned on. The turn-off signal is a signal that instructs the lighting load 41 to be turned off. The dimming signal is a signal that instructs the dimming level of the lighting load 41.

The dimming module 44 includes a wireless communication unit 441, a memory unit 442, a signal generation unit 443, and an update unit 444.

The dimming module 44 includes a computer system. In this computer system, a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit) reads and executes software (programs) stored in memory to realize some or all of the functions of the dimming module 44. The computer system has a processor that operates according to software as its main hardware configuration. The type of processor is not important as long as it can realize functions by executing software. The processor is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or an LSI (large scale integration). Here, it is called an IC or an LSI, but the name changes depending on the degree of integration, and it may be called a system LSI, VLSI (very large scale integration), or ULSI (ultra large scale integration). A field programmable gate array (FPGA), which is programmed after the LSI is manufactured, or a reconfigurable logic device that can reconfigure the junction relationship inside the LSI or set up the circuit partition inside the LSI, can also be used for the same purpose. The electronic circuits may be integrated on one chip, or may be provided on multiple chips. The multiple chips may be integrated on one device, or may be provided on multiple devices.

Specifically, the wireless communication unit 441 functions as a first acquisition unit 4411 that receives a wireless control signal that indicates the state (on, off, and dimming level) of the lighting load 41. The wireless communication unit 441 also functions as a second acquisition unit 4412 that receives update data for updating the software described below.

The memory unit 442 stores software for generating a light-on signal, a light-off signal, and a dimming signal based on the control signal. The memory unit 442 is preferably a rewritable non-volatile memory such as an EEPROM (Electrically Erasable Programmable Read Only Memory) or a flash memory.

The signal generating unit 443 executes the software read from the memory unit 442 to generate various signals, such as a light-on signal, a light-off signal, or a dimming signal, based on the wireless control signal.

The update unit 444 updates the software stored in the memory unit 442 based on the update data.

The software must have at least the functionality to generate a dimming signal based on the control signal.

(3) Control of lighting fixtures The parent unit 2 and the communication terminal 3 perform wired communication via a communication line L1. The wired communication preferably complies with standards for a wired LAN (Local Area Network) such as Ethernet (registered trademark). In this case, the communication line L1 is a LAN cable such as a UTP cable or an STP cable, and the parent unit 2 and the communication terminal 3 perform communication control using at least a MAC address. The parent unit 2 and the communication terminal 3 may also perform communication control using a MAC address and an IP address.

In this embodiment, the multiple communication terminals 3 include a wireless communication terminal 31 and a switch terminal 32.

The wireless communication terminal 31 converts a wired signal received via the communication line L1 into a wireless signal and transmits the wireless signal to the lighting fixture 4. The wireless communication terminal 31 also converts a wireless signal received from the lighting fixture 4 into a wired signal and transmits the wired signal to the parent unit 2 via the communication line L1. In this embodiment, a radio signal is used as the wireless signal. The radio signal is preferably a signal in the 920 MHz band, for example. The radio signal may be a signal in a band other than the 920 MHz band, for example a 2.4 GHz band signal. The radio signal may also be a signal that complies with standards such as wireless LAN, Bluetooth (registered trademark), or ZigBee (registered trademark).

The switch terminal 32 has at least one operation unit that accepts user operations. The operation unit corresponds to one or more of the multiple lighting fixtures 4. That is, the operation unit is pre-associated with one or more lighting fixtures 4 that are to be controlled by the operation unit. The switch terminal 32 also has a display unit for displaying the current state (such as on/off and dimming level of the lighting load 41) of the lighting fixture 4 associated with the operation unit. The display unit has a light-emitting element such as an LED, or a liquid crystal panel.

The switch terminal 32 transmits a signal corresponding to a user's operation on the operation unit as an operation signal to the parent unit 2 via the communication line L1. The user's operation on the operation unit includes an operation for switching the state of the lighting device 4 associated with the operation unit (such as turning on, off, and dimming level of the lighting load 41). The switch terminal 32 prestores identification information of the switch terminal 32 (e.g., address information such as a MAC address and an IP address), and the operation signal includes the identification information of the switch terminal 32.

The parent unit 2 stores the identification information of each of the multiple communication terminals 3 (such as the wireless communication terminal 31 and the switch terminal 32) connected to the communication line L1. Furthermore, when the parent unit 2 receives an operation signal, it transmits a control signal based on the operation signal to the wireless communication terminal 31 via the communication line L1. The control signal includes the control content of the lighting fixture 4 to be controlled. The wireless communication terminal 31 converts the control signal into a wireless signal and transmits the control signal to the lighting fixture 4 to be controlled.

In the lighting fixture 4, when the wireless communication unit 441 receives a control signal addressed to the lighting fixture 4, the signal generation unit 443 generates a turn-on signal, turn-off signal, dimming signal, etc. according to the control content instructed by the control signal. If the control signal instructs the lighting load 41 to be turned on, the signal generation unit 443 generates a turn-on signal instructing the lighting load 41 to be turned on. If the control signal instructs the lighting load 41 to be turned off, the signal generation unit 443 generates an off signal instructing the lighting load 41 to be turned off. If the control signal instructs the dimming level of the lighting load 41, the signal generation unit 443 generates a dimming signal instructing the dimming level.

When the signal generating unit 443 generates a turn-on signal, the lighting control unit 43 controls the lighting device 42 to turn on the lighting load 41. When the signal generating unit 443 generates a turn-off signal, the lighting control unit 43 controls the lighting device 42 to turn off the lighting load 41. When the signal generating unit 443 generates a dimming signal, the lighting control unit 43 controls the lighting device 42 to match the dimming level of the lighting load 41 with the specified dimming level.

The signal that the lighting control unit 43 outputs to the lighting device 42 to control the lighting device 42 is preferably a PWM signal. The PWM signal is a voltage signal of a predetermined DC voltage (e.g., 12V), and indicates the dimming level by varying the duty of the voltage signal. For example, if the duty is 0% to 5%, the PWM signal indicates a dimming level of 100% (all lights on). If the duty is 98% to 100%, the PWM signal indicates a dimming level of 0% (lights off). If the duty is 90%, the PWM signal indicates a dimming level of 5%. If the duty is 5% to 90%, the PWM signal indicates a dimming level according to the duty. Note that a duty of 90% to 98% is not used to prevent malfunction. In this case, when the output of the PWM signal by the lighting control unit 43 stops, the duty of the PWM signal becomes 0%, and the lighting control unit 43 instructs the dimming level to be 100%. Therefore, when the output of the PWM signal by the lighting control unit 43 stops, the lighting load 41 is fully lit.

When the lighting fixture 4 controls the lighting load 41, such as turning it on or off or controlling the dimming level, it transmits the state of the lighting load 41 after control as a monitoring signal to the parent unit 2 via the wireless communication terminal 31. When the wireless communication terminal 31 receives the monitoring signal, it converts the monitoring signal into a wired signal and transmits the monitoring signal to the parent unit 2 via the communication line L1.

When the parent unit 2 receives the monitoring signal, it generates a display signal based on the monitoring signal and transmits the display signal to the switch terminal 32 via the communication line L1. The display signal is a wired signal for controlling the display content of the display unit of the switch terminal 32. The switch terminal 32 changes the display content of the display unit based on the display signal. As a result, the display unit of the switch terminal 32 can display the state of the lighting load 41 after control.

(4) Software Update The software stored in the memory unit 442 of the lighting device 4 is software for the signal generating unit 443 to generate a turn-on signal, a turn-off signal, and a dimming signal based on a control signal, and is updated from time to time to improve and change the function of the lighting device 4. That is, the signal generating unit 443 executes the software to generate the turn-on signal, the turn-off signal, and the dimming signal. Therefore, when the software is updated, a period occurs during which the signal generating unit 443 cannot execute the software, and the operation of the signal generating unit 443 stops. Therefore, if the software is updated while the lighting load 41 is turned on, the dimming signal is not generated by the signal generating unit 443, and the dimming level of the lighting load 41 may become unstable. If the dimming level of the lighting load 41 becomes unstable, it may cause discomfort to people within the irradiation range 6 (see FIG. 1).

Therefore, in this embodiment, the lighting device 4 performs the operation shown in Figure 3 when updating the software.

First, in the lighting device 4, the entire storage area of the storage unit 442 is divided into two areas, a first area and a second area, and the software being executed by the signal generating unit 443 (the software before the update) is stored in either the first area or the second area. Here, it is assumed that the software before the update is stored in the first area. Then, the signal generating unit 443 operates in normal mode at time t0, executes the software stored in the first area, and generates a dimming signal that indicates the first level D1 as the dimming level according to the control signal. That is, from time t0 to t1, the dimming level of the lighting load 41 is the first level D1. Note that the first level D1 is a dimming level less than 100%, and the lighting load 41 is dimmed.

When the need for a software update arises, the parent unit 2 transmits update data to the wireless communication terminal 31 via the communication line L1. The update data includes the updated software or a patch for partially updating the software. The wireless communication terminal 31 converts the update data into a wireless signal and transmits it to all of the lighting fixtures 4 under its control. If the wireless communication terminal 31 transmits update data to multiple lighting fixtures 4, it may broadcast or multicast the update data to the multiple lighting fixtures 4 by wireless signal, or it may unicast the update data to the multiple lighting fixtures 4 sequentially by wireless signal.

The parent unit 2 may also obtain the update data via a setting device 5 shown in FIG. 1. The setting device 5 is an information terminal such as a portable tablet terminal or smartphone, which obtains and stores the update data from a server on a network such as the Internet. The setting device 5 then transmits the update data to the parent unit 2 via a wireless signal such as a wireless LAN. The parent unit 2 stores the update data received from the setting device 5.

In the lighting fixture 4, the wireless communication unit 441 receives the update data. When the wireless communication unit 441 receives the update data, the update unit 444 stores the update data in the second area of the memory unit 442. If the previous software or update data is stored in the second area, the update unit 444 overwrites the second area with the current update data. At this point, the software before the update is stored in the first area of the memory unit 442, and the update data is stored in the second area of the memory unit 442. That is, from time t0 to t1, the signal generation unit 443 operating in normal mode generates a dimming signal instructing the first level D1, which is the dimming level according to the control signal, and the update data is downloaded to the memory unit 442.

Next, at time t1, the parent unit 2 transmits an update start command (control signal) to the wireless communication terminal 31 via the communication line L1. The wireless communication terminal 31 converts the update start command into a wireless signal and transmits it to all of the subordinate lighting fixtures 4. If the wireless communication terminal 31 transmits the update start command to multiple lighting fixtures 4, it may broadcast or multicast the update start command to the multiple lighting fixtures 4 by wireless signal, or it may unicast the update start command to the multiple lighting fixtures 4 in sequence by wireless signal.

In the lighting fixture 4, the wireless communication unit 441 receives the update start command. When the wireless communication unit 441 receives the update start command, the signal generation unit 443 transitions the operation mode from the normal mode to the fade mode. The signal generation unit 443 operating in the fade mode temporarily stores data of the first level D1, which is the current dimming level, and then performs fade control to generate a dimming signal that gradually changes the first level D1 to a second level D2, which is a predetermined dimming level. In FIG. 3, the second level D2 is a dimming level of 100% that fully lights up the lighting load 41, and the signal generation unit 443 gradually increases the dimming level from the first level D1 at a predetermined time change rate (amount of change in dimming level per hour). As a result, the dimming level of the lighting load 41 starts to increase from the first level D1 at time t1 and reaches the second level D2 at time t2. The time rate of change of the dimming level in the fade mode is set to a value that can sufficiently suppress the discomfort felt by people in the irradiation range 6 due to the change in the dimming level. For example, it is preferable that the time rate of change of the dimming level in the fade mode is set to a value that does not cause discomfort to people in the irradiation range 6 due to the change in the dimming level.

When the dimming level indicated by the dimming signal reaches the second level D2 at time t2, the signal generating unit 443 stops outputting the dimming signal. The lighting control unit 43 is configured in advance to control the lighting device 42 so that the dimming level becomes the second level D2 unless a dimming signal is input. Therefore, when the signal generating unit 443 stops outputting the dimming signal, the dimming level maintains the second level D2. Note that the lighting control unit 43 may be configured to control the lighting device 42 so that the dimming level maintains the second level D2 immediately before the output of the dimming signal stops.

Then, after time t2, when the dimming level of the lighting load 41 maintains the second level D2, the update unit 444 updates the software based on the update data. Specifically, the update unit 444 resets the signal generation unit 443.

If the update data is updated software, the signal generating unit 443 is reset and then reads and executes the updated software from the second area of the memory unit 442. In this case, the next update data is stored in the first area of the memory unit 442.

If the update data is a patch, the update unit 444 reads both the pre-update software stored in the first area and the patch stored in the second area. The update unit 444 then generates updated software by modifying the pre-update software based on the patch. The update unit 444 overwrites the first area with the updated software. After resetting, the signal generation unit 443 reads and executes the updated software overwritten in the first area. In this case, the next update data is stored in the second area of the memory unit 442.

The signal generating unit 443 temporarily stores data of the first level D1, which is the dimming level before the update. If the updated software can be executed normally, the signal generating unit 443 performs fade control to generate a dimming signal that gradually changes the dimming level from the second level D2 to the first level D1. The signal generating unit 443 gradually reduces the dimming level from the second level D2 at a predetermined time change rate (amount of change in dimming level per time). As a result, the dimming level of the lighting load 41 starts to decrease from the second level D2 at time t3 and reaches the first level D1 at time t4. The time change rate of the dimming level in the fade mode is set to a value that can sufficiently suppress the discomfort caused to people in the irradiation range 6 by the change in the dimming level. For example, it is preferable that the time change rate of the dimming level in the fade mode is set to a value that does not cause discomfort to people in the irradiation range 6 by the change in the dimming level.

After the dimming level indicated by the dimming signal reaches the first level D1 at time t4, the signal generating unit 443 generates a dimming signal so that the dimming level corresponds to the control signal.

As described above, the lighting system 40 maintains the dimming level of the lighting load 41 at the predetermined second level D2 when the software is updated. Therefore, the dimming level of the lighting load 41 does not become unstable when the software is updated, and discomfort felt by people within the illumination range 6 can be suppressed.

In addition, when the lighting system 40 changes the dimming level of the lighting load 41 in accordance with a software update, the lighting system 40 fades the dimming level of the lighting load 41. Therefore, when the software is updated, the change in the dimming level is less likely to be noticed by people within the illumination range 6, and the discomfort felt by people within the illumination range 6 can be further reduced.

(5) First Modification As a first modification of the lighting system 1, a lighting system 1A in Fig. 4 is shown. The lighting system 1A further includes a plurality of motion sensors 33 as the communication terminal 3. The plurality of motion sensors 33 are in one-to-one correspondence with the plurality of lighting fixtures 4. Each of the plurality of motion sensors 33 detects a person present within the illumination range 6 of the corresponding lighting fixture 4. The motion sensor 33 transmits the detection result to the lighting fixture 4 corresponding to the motion sensor 33. The motion sensor 33 may transmit the detection result to the lighting fixture 4 via the parent unit 2.

As shown in FIG. 5, the dimming module 44 of the lighting system 40 of the lighting system 1A further includes an update permission unit 445.

The update permission unit 445 determines whether or not to permit the software update process by the update unit 444 based on the detection result of the associated human presence sensor 33. If a person is present within the irradiation range 6, the update permission unit 445 prohibits the software update process by the update unit 444. If no person is present within the irradiation range 6, the update permission unit 445 permits the software update process by the update unit 444. At this time, it is preferable that the update permission unit 445 permits the software update process by the update unit 444 if a state in which no person is present within the irradiation range 6 continues for a predetermined time or more.

Specifically, in the lighting device 4, after the wireless communication unit 441 receives the update start command, the update permission unit 445 maintains the operation mode of the signal generation unit 443 in the normal mode if a person is present within the irradiation range 6. In other words, if a person is present within the irradiation range 6, the operation mode of the signal generation unit 443 does not transition to the fade mode, and the software update process by the update unit 444 goes into a standby state.

On the other hand, after the wireless communication unit 441 receives the update start command, if there is no person within the irradiation range 6 (or if the state in which there is no person within the irradiation range 6 continues for a predetermined time or more), the update permission unit 445 transitions the operation mode of the signal generation unit 443 from the normal mode to the fade mode. In other words, if there is no person within the irradiation range 6, the operation mode of the signal generation unit 443 transitions to the fade mode, and the update unit 444 performs the software update process.

Note that "allowing the update unit 444 to perform software update processing" is synonymous with "allowing the lighting control unit 43 to adjust the dimming level to the second level D2."

As described above, the lighting system 40 does not perform a software update process if a person is present within the illumination range 6, and performs a software update process if a person is not present within the illumination range 6. Therefore, when updating the software, it is possible to make it difficult for people to notice the change in dimming level, and to further reduce the sense of discomfort felt by people.

(6) Second Modification As a second modification of the lighting system 1, a lighting system 1B in Fig. 6 is shown. The lighting system 1B further includes a plurality of illuminance sensors 34 as the communication terminal 3. The plurality of illuminance sensors 34 are in one-to-one correspondence with the plurality of lighting fixtures 4. Each of the plurality of illuminance sensors 34 detects the illuminance of the illumination range 6 of the corresponding lighting fixture 4. The illuminance sensor 34 transmits the detection result to the lighting fixture 4 corresponding to the illuminance sensor 34. The illuminance sensor 34 may transmit the detection result to the lighting fixture 4 via the parent unit 2.

As shown in FIG. 4, the dimming module 44 of the lighting system 40 of the lighting system 1B further includes an update permission unit 445.

The signal generating unit 443 adjusts the dimming level instructed by the dimming signal so that the illuminance within the irradiation range 6 matches the target value. As a result, the illuminance within the irradiation range 6 can be maintained at the target value regardless of the presence or absence of external light and the intensity of the external light.

The update permission unit 445 determines whether to permit the software update process by the update unit 444 based on the detection result of the illuminance sensor 34. The update permission unit 445 prohibits the software update process by the update unit 444 if a constant illuminance state in which the illuminance in the irradiation range 6 does not change continues for a predetermined time or more. If the constant illuminance state continues for a predetermined time or more, the update permission unit 445 permits the software update process by the update unit 444. Note that the constant illuminance state is a state in which the illuminance in the irradiation range 6 does not change beyond a predetermined amount of change.

Specifically, in the lighting device 4, after the wireless communication unit 441 receives the update start command, the update permission unit 445 maintains the operation mode of the signal generation unit 443 in the normal mode if the constant illuminance state has not continued for a predetermined time or more. In other words, if the constant illuminance state has not continued for a predetermined time or more, the operation mode of the signal generation unit 443 does not transition to the fade mode, and the software update process by the update unit 444 goes into a standby state.

On the other hand, after the wireless communication unit 441 receives the update start command, if the constant illuminance state continues for a predetermined time or more, the update permission unit 445 transitions the operation mode of the signal generation unit 443 from normal mode to fade mode. In other words, if the constant illuminance state continues for a predetermined time or more, the operation mode of the signal generation unit 443 transitions to fade mode, and the update unit 444 performs software update processing.

As described above, the lighting system 40 does not perform software update processing unless the constant illuminance state continues for a predetermined time or more, and performs software update processing if the constant illuminance state continues for a predetermined time or more. A constant illuminance state is likely to occur when the amount of external light entering the irradiation range 6 is constant. When the amount of external light entering the irradiation range 6 changes frequently, the signal generation unit 443 also frequently adjusts the dimming level. Therefore, when the signal generation unit 443 also frequently adjusts the dimming level, the lighting system 40 does not perform software update processing, and therefore it is possible to prevent the illuminance in the irradiation range 6 from becoming unstable.

(7) Third Modification In the lighting systems 1, 1A, and 1B, the download path of update data for the multiple lighting fixtures 4 may be configured as follows.

The multiple lighting fixtures 4 include at least one first lighting fixture that acquires update data from the parent unit 2, and at least one second lighting fixture that acquires update data from one of the multiple lighting fixtures 4. In this modification, the three lighting fixtures 4 shown in any of Figures 1, 4, and 6 are respectively referred to as the first lighting fixture 4a, the second lighting fixture 4b, and 4c.

When the need for a software update arises, the parent device 2 transmits update data to the wireless communication terminal 31 via the communication line L1. The wireless communication terminal 31 converts the update data into a wireless signal and transmits it to the first lighting fixture 4a. The first lighting fixture 4a receives the update data from the wireless communication terminal 31. Next, the first lighting fixture 4a transmits the update data to the second lighting fixture 4b, and the second lighting fixture 4b receives the update data from the first lighting fixture 4a. Next, the second lighting fixture 4b transmits the update data to the second lighting fixture 4c, and the second lighting fixture 4c receives the update data from the second lighting fixture 4b. That is, the update data is transmitted from the first lighting fixture 4a to the second lighting fixtures 4b and 4c in a multi-hop manner.

The first lighting fixture 4a may also broadcast or multicast update data to the second lighting fixtures 4b and 4c.

In other words, the wireless communication terminal 31 only needs to transmit update data to the first lighting device 4a, so the amount of processing performed by the wireless communication terminal 31 can be reduced. In addition, the number of times that the parent unit 2 transmits update data can be reduced, so communication traffic on the communication line L1 can be reduced.

(8) Fourth Modification In the lighting systems 1, 1A, and 1B, multiple lighting fixtures 4 may be arranged in one zone Z0 (see FIGS. 1, 4, and 6). For example, a floor of a building, office, store, or the like is divided into multiple areas, and each of the multiple areas is further divided into multiple zones. Normally, all lighting fixtures 4 in a zone are controlled to the same state (on, off, dimming level).

When multiple lighting fixtures 4 in zone Z0 perform software update processing, the multiple lighting fixtures 4 in zone Z0 do not perform software update processing simultaneously, but each of the multiple lighting fixtures 4 performs software update processing one by one in sequence. The lighting fixtures 4 undergoing software update processing set the dimming level of the lighting load 41 to the second level D2. The other lighting fixtures 4 that are not undergoing software update processing adjust the dimming level of the lighting load 41 so that the average illuminance of zone Z0 becomes a predetermined value.

In this modified example, the three lighting fixtures 4 shown in any of Figures 1, 4, and 6 are designated as lighting fixtures 4a, 4b, and 4c, respectively.

When lighting fixture 4a starts the software update process, the dimming level of lighting fixture 4a's lighting load 41 is adjusted to the second level D2 (fully lit). Therefore, lighting fixtures 4b and 4c control the dimming level of their lighting loads 41 to be lower than the current first level D1, so that the average illuminance of zone Z0 becomes a constant value. At this time, it is sufficient to lower the dimming level of the lighting load 41 of at least one of lighting fixtures 4b and 4c below the current first level D1.

Similarly, when lighting fixture 4b starts the software update process, lighting fixtures 4a and 4c lower the dimming level of lighting load 41 below the current first level D1. When lighting fixture 4c starts the software update process, lighting fixtures 4a and 4b lower the dimming level of lighting load 41 below the current first level D1.

Therefore, even if one lighting fixture 4 in zone Z0 starts a software update process and adjusts the dimming level of the lighting load 41 to the second level D2, the average illuminance in zone Z0 can be maintained constant. As a result, the discomfort felt by people in zone Z0 during the software update can be reduced.

7, in the fifth modification, an area R1 is divided into three zones Z1 to Z3, and each of the lighting fixtures 4 is arranged in one of the three zones Z1 to Z3. Four lighting fixtures 4 are arranged in each of the zones Z1 to Z3.

When software update processing is performed in zone Z1, the four lighting fixtures 4 arranged in zone Z1 do not perform software update processing simultaneously, but each of the four lighting fixtures 4 performs software update processing one by one in sequence. Similarly, in zones Z2 and Z3, each of the four lighting fixtures 4 performs software update processing one by one in sequence.

Therefore, even if one lighting fixture 4 in each of zones Z1 to Z3 starts a software update process and adjusts the dimming level of the lighting load 41 to the second level D2, it is possible to suppress the discomfort felt by people in each of zones Z1 to Z3.

(10) Sixth Modification In the sixth modification, in the lighting system 1A of Fig. 4 or the lighting system 1B of Fig. 6, the timing at which the master unit 2 transmits update data is set as follows. Note that the human presence sensor 33 of the lighting system 1A and the illuminance sensor 34 of the lighting system 1B correspond to sensors that detect the environment (presence or absence of a person, illuminance, etc.) within the illumination range 6 in the present disclosure.

The motion sensor 33 of the lighting system 1A has a detection mode and a standby mode as its operation modes. The detection mode is an operation mode when the motion sensor 33 detects a person, and the motion sensor 33 transmits the detection results more frequently than in the standby mode, resulting in increased communication traffic on the communication line L1. The standby mode is an operation mode when the motion sensor 33 does not detect a person, and the motion sensor 33 transmits the detection results less frequently than in the detection mode, resulting in reduced communication traffic on the communication line L1.

The parent unit 2 monitors the operation of the human presence sensor 33 via the communication line L1, and transmits update data when the human presence sensor 33 is not operating in detection mode or when the human presence sensor 33 is operating in standby mode. In other words, the update data is downloaded when the communication traffic on the communication line L1 by the human presence sensor 33 is low. Therefore, the communication traffic on the communication line L1 can be suppressed when the update data is downloaded.

In addition, in lighting system 1B, parent unit 2 monitors the operation of illuminance sensor 34 via communication line L1. Parent unit 2 does not transmit update data to wireless communication terminal 31 unless the constant illuminance state continues for a predetermined time or more, and transmits update data to wireless communication terminal 31 if the constant illuminance state continues for a predetermined time or more. Illuminance sensor 34 transmits detection results more frequently if the illuminance state is not constant, and transmits detection results less frequently if the illuminance state is constant. Therefore, communication traffic on communication line L1 can be suppressed when downloading update data.

(11) Seventh Modification Fig. 8 shows a lighting system 1C as a seventh modification of the lighting system 1. Note that the lighting fixture 4 of the lighting system 1C is assumed to be a lighting fixture 4C.

In the lighting system 1C, the lighting fixtures 4C constitute child units for the parent unit 2, similar to the communication terminal 3, and the parent unit 2 and the lighting fixtures 4C are connected to the same communication line L1. The parent unit 2 and each of the multiple lighting fixtures 4C are configured to be able to communicate with each other via the communication line L1. The parent unit 2 can transmit wired signals to each of the multiple lighting fixtures 4C via the communication line L1, and can receive wired signals from each of the multiple lighting fixtures 4C via the communication line L1.

As shown in FIG. 9, the lighting fixture 4C includes a wired communication unit 441C that communicates using a wired signal via the communication line L1. The wired communication unit 441C functions as a first acquisition unit 4411C that receives a wired control signal that indicates the state (on, off, and dimming level) of the lighting load 41. The wired communication unit 441C also functions as a second acquisition unit 4412C that receives update data for updating the software.

In this case, the master unit 2 controls the lighting fixture 4C to turn on, turn off, and dim based on DALI (Digital Addressable Lighting Interface), an international standard communication specification for lighting control. In other words, the master unit 2 controls the lighting fixture 4C using wired control signals that include commands that comply with standards such as DALI.

In addition, it is preferable that the download of update data from the parent unit 2 to the lighting fixture 4C is performed in accordance with a communication standard such as dedicated communication for the lighting system 1C or a wired LAN.

(12) Eighth Modification As shown in Fig. 10, the lighting fixture 4 includes a light source unit 402 and a fixture body 401 that supports the light source unit 402. The light source unit 402 is detachably attached to the fixture body 401 that is directly attached to a ceiling. However, the fixture body 401 may be embedded in the ceiling, or may be directly attached to a wall or may be embedded in the wall. The light source unit 402 includes a lighting system 40 and a lighting load 41.

Lighting fixture 4C may also have the configuration shown in FIG. 10, similar to lighting fixture 4.

Note that the lighting fixtures including the lighting system 40 and the lighting load 41 are not limited to the lighting fixtures 4 and 4C in FIG. 10, and may be other lighting fixtures.

(13) Ninth Modification The communication for monitoring and controlling the communication terminal 3 by the master unit 2 via the communication line L1 may be performed by a time division multiplexing transmission method. For example, the NMAST (registered trademark) communication standard may be adopted as a communication protocol for the time division multiplexing transmission method. The master unit 2 and the communication terminal 3 send bipolar (±24V) time division multiplexing signals as wired signals to the communication line L1, and transmit operation signals, control signals, etc. by pulse width modulation. In this case, the master unit 2 transmits the update data to the wireless communication terminal 31 by superimposing the update data on the time division multiplexing signal.

Furthermore, communication for monitoring and controlling a child device such as a communication terminal 3 by the parent device 2 via the communication line L1 may be realized by transmitting a communication signal of a proprietary protocol on the physical layer of RS485.

In addition, communication for monitoring and controlling child devices such as the communication terminal 3 by the parent device 2 via the communication line L1 may be performed using a power line communication (PLC) method. It is preferable that the power line communication is high-speed power line communication (e.g., HD-PLC, etc.).

In addition, the communication between the parent device 2 and a child device such as the communication terminal 3 may be wireless communication. It is preferable that the wireless communication conforms to a standard such as wireless LAN, Bluetooth, or ZigBee.

The lighting fixture 4 may also obtain update data from a terminal other than the parent unit 2. For example, the lighting fixture 4 may obtain update data from a setting device 5 shown in Figures 1, 4, 6, and 8. The setting device 5 is an information terminal that can be carried by a person, and transmits update data by wireless signals.

The lighting fixture 4 may also obtain update data directly from the parent unit 2 without going through the wireless communication terminal 31.

The first acquisition unit 4411 and the second acquisition unit 4412 may be configured separately. For example, the communication method used by the first acquisition unit 4411 may be different from the communication method used by the second acquisition unit 4412.

The second level D2 may be a dimming level other than 100% at which the lighting load 41 is fully turned on. For example, the second level D2 may be the lower limit of the dimming level.

In addition, the configurations of the above-mentioned embodiments and each of the modified examples can be combined as appropriate.

The lighting load 41 may also include multiple types of solid-state light-emitting elements that emit light of different colors. For example, the lighting load 41 includes a red LED that emits red (R) light, a green LED that emits green (G) light, and a blue LED that emits blue (B) light. The lighting system 40 adjusts the dimming levels of the red LED, green LED, and blue LED to adjust the color of the light emitted by the lighting load 41. In this case, the lighting system 40 maintains the dimming levels of the red LED, green LED, and blue LED at a predetermined second level (e.g., dimming level 100%) when updating the software.

(14) Summary As described above, the lighting system (40) of the first aspect according to the embodiment includes the lighting device (42), the first acquisition unit (4411, 4411C), the storage unit (442), the signal generation unit (443), the lighting control unit (43), the second acquisition unit (4412, 4412C), and the update unit (444). The lighting device (42) turns on the lighting load (41). The first acquisition unit (4411, 4411C) receives a control signal indicating the state of the lighting load (41). The storage unit (442) stores software for generating a dimming signal indicating a dimming level of the lighting load (41) based on the control signal. The signal generation unit (443) generates a dimming signal based on the control signal by executing the software read from the storage unit (442). The lighting control unit (43) controls the lighting device (42) based on the dimming signal. The second acquisition unit (4412, 4412C) receives update data for updating the software. The update unit (444) updates the software based on the update data. When the second acquisition unit (4412, 4412C) receives the update data while the lighting control unit (43) is adjusting the dimming level to a first level (D1) based on a dimming signal, the lighting control unit (43) adjusts the dimming level to a predetermined second level (D2). The update unit (444) updates the software based on the update data when the dimming level is the second level (D2).

The lighting system (40) described above can reduce the discomfort felt by people when updating software.

In the lighting system (40) of the second aspect of the embodiment, in the first aspect, when the second acquisition unit (4412, 4412C) receives update data while the lighting control unit (43) is adjusting the dimming level to the first level (D1), it is preferable that the lighting control unit (43) performs fade control to gradually change the dimming level from the first level (D1) to the second level (D2) at a predetermined time change rate.

The lighting system (40) described above makes it difficult for people within the illumination range (6) to notice the change in dimming level when updating the software, and can further reduce the discomfort felt by people.

In the lighting system (40) of the third aspect of the embodiment, in the second aspect, after the update unit (444) updates the software, it is preferable that the lighting control unit (43) performs fade control to gradually change the dimming level from the second level (D2) to the first level (D1) at a predetermined time change rate.

The lighting system (40) described above makes it difficult for people within the illumination range (6) to notice the change in dimming level when updating the software, and can further reduce the discomfort felt by people.

In the lighting system (40) of the fourth aspect of the embodiment, in any one of the first to third aspects, it is preferable that the memory unit (442) has two memory areas. When the second acquisition unit (4412, 4412C) receives update data while the signal generation unit (443) is executing software stored in one of the two memory areas, the memory unit (442) stores the update data in the other of the two memory areas. The update unit (444) updates the software executed by the signal generation unit (443) based on the update data when the dimming level is the second level (D2).

The lighting system (40) described above can store software and update data separately.

In the lighting system (40) of the fifth aspect of the embodiment, in any one of the first to fourth aspects, the second level (D2) is preferably a dimming level that fully lights up the lighting load (41) or a lower limit of the dimming level of the lighting load (41).

The lighting system (40) described above can unify the dimming levels of the lighting loads (41) when updating software.

The lighting system (40) of the sixth aspect of the embodiment, in any one of the first to fifth aspects, preferably includes one communication unit (441, 441C) that receives a wireless signal or a wired signal. The one communication unit (441) functions as a first acquisition unit (4411) and a second acquisition unit (4412).

The lighting system (40) described above can simplify the configuration of the first acquisition unit (4411, 4411C) and the second acquisition unit (4412, 4412C).

The lighting system (40) of the seventh aspect of the embodiment, in any one of the first to sixth aspects, preferably further includes an update permission unit (445). The update permission unit (445) acquires the detection result of the human presence sensor (33) that detects a person present in the irradiation range (6) in which the lighting load (41) emits light. If the state in which the human presence sensor (33) does not detect a person continues for a predetermined time or more, the update permission unit (445) permits the lighting control unit (43) to adjust the dimming level to the second level (D2).

The lighting system (40) described above makes it difficult for people to notice changes in dimming levels when updating software, and can further reduce the discomfort felt by people.

The lighting system (40) of the eighth aspect of the embodiment is preferably further provided with an update permission unit (445) in any one of the first to sixth aspects. The update permission unit (445) acquires the detection result of the illuminance sensor (34) that detects the illuminance of the light emitted by the lighting load (41). If the state in which the illuminance does not change continues for a predetermined time or more, the update permission unit (445) permits the lighting control unit (43) to adjust the dimming level to the second level (D2).

The above-mentioned lighting system (40) can prevent the illuminance in the illumination range (6) from becoming unstable.

A lighting fixture (4, 4C) of a ninth aspect of the embodiment includes a lighting system (40) of any one of the first to eighth aspects, a lighting load (41) that is turned on by the lighting system (40), and a fixture body (401) that supports at least the lighting load (41).

The above-mentioned lighting fixtures (4, 4C) can reduce the discomfort felt by people when updating software.

The lighting system (1, 1A, 1B, 1C) of the tenth aspect of the embodiment preferably includes a plurality of lighting fixtures (4, 4C) and a parent unit (2) that transmits update data to at least one lighting fixture (4, 4C) of the plurality of lighting fixtures (4, 4C). Each of the plurality of lighting fixtures (4, 4C) is the lighting fixture (4, 4C) of the ninth aspect.

The above-mentioned lighting system (1, 1A, 1B, 1C) can reduce the discomfort felt by people when updating software.

In the lighting system (1, 1A, 1B, 1C) of the eleventh aspect of the embodiment, in the tenth aspect, it is preferable that the plurality of lighting fixtures (4, 4C) includes at least one first lighting fixture (4a) and at least one second lighting fixture (4b, 4c). The at least one first lighting fixture (4a) acquires update data from the parent unit (2). The at least one second lighting fixture (4b, 4c) acquires update data from any one of the plurality of lighting fixtures (4, 4C).

The lighting system (1, 1A, 1B, 1C) described above can reduce the number of times update data is sent by the parent unit (2), thereby reducing communication traffic.

In the lighting system (1, 1A, 1B) of the twelfth aspect of the embodiment, in the tenth or eleventh aspect, it is preferable that the multiple lighting fixtures (4, 4C) are arranged in one zone (Z0). When at least one lighting fixture (4, 4C) of the multiple lighting fixtures (4, 4C) updates its software, the parent unit (2) adjusts the dimming levels of the lighting loads (41) of the other lighting fixtures (4, 4C) of the multiple lighting fixtures (4, 4C) so that the average illuminance of the zone (Z0) becomes a predetermined value.

The above-mentioned lighting system (1, 1A, 1B, 1C) can reduce the discomfort felt by people in the zone (Z0) when updating software.

In the lighting system (1, 1A, 1B, 1C) of the thirteenth aspect of the embodiment, in the tenth aspect, it is preferable that each of the multiple lighting fixtures (4, 4C) is arranged in one of the multiple zones (Z1 to Z3). In each of the multiple zones (Z1 to Z3), the lighting fixtures (4, 4C) that are to undergo software updates are switched one by one in sequence among the lighting fixtures (4, 4C) that belong to each of the multiple zones (Z1 to Z3).

The above-mentioned lighting systems (1, 1A, 1B, 1C) can reduce the sense of discomfort felt by people in each of the zones (Z1 to Z3).

The lighting system (1, 1A, 1B) of the fourteenth aspect of the embodiment, in any one of the tenth to thirteenth aspects, preferably further includes a sensor (33, 34) that detects the environment within the illumination range (6) illuminated by the light of the lighting load (41). The parent unit (2) preferably transmits update data to at least one lighting fixture (4, 4C) at least either when the sensor (33, 34) is not operating in an operation mode in which the sensor (33, 34) detects the environment, or when the state in which the detection result of the sensor (33, 34) does not change continues for a predetermined time or more.

The above-mentioned lighting system (1, 1A, 1B, 1C) can reduce communication traffic when downloading update data.

The above-described embodiment and modified examples are merely examples. Therefore, the present disclosure is not limited to the above-described embodiment and modified examples, and it goes without saying that various modifications other than the above-described embodiment and modified examples are possible according to the design, etc., as long as they do not deviate from the technical concept of the present disclosure.

1, 1A, 1B, 1C Lighting system 2 Parent unit 33 Human presence sensor (sensor)
34 Illuminance sensor (sensor)
4, 4C Lighting fixture 4a First lighting fixture (lighting fixture)
4b, 4c Second lighting fixture (lighting fixture)
40 Lighting system 41 Lighting load 42 Lighting device 43 Lighting control unit 441 Wireless communication unit (communication unit)
441C Wired communication unit (communication unit)
442 Memory unit 443 Signal generation unit 444 Update unit 445 Update permission unit 4411, 4411C First acquisition unit 4412, 4412C Second acquisition unit 401 Device body 6 Irradiation range D1 First level D2 Second level Z0 to Z3 Zone

Claims (12)

A lighting device for lighting a lighting load;
A first acquisition unit that receives a control signal indicating a state of the lighting load;
A storage unit for storing software for generating a dimming signal indicating a dimming level of the lighting load based on the control signal;
a signal generating unit that generates the dimming signal based on the control signal by executing the software read from the storage unit;
a lighting control unit that controls the lighting device based on the dimming signal;
A second acquisition unit that receives update data for updating the software;
an update unit that updates the software based on the update data,
When the second acquisition unit receives the update data while the lighting control unit is adjusting the dimming level to a first level based on the dimming signal, the lighting control unit adjusts the dimming level to a predetermined second level,
The update unit updates the software based on the update data when the dimming level is the second level,
When the second acquisition unit receives the update data while the lighting control unit is adjusting the dimming level to the first level, the lighting control unit performs fade control to gradually change the dimming level from the first level to the second level at a predetermined time change rate,
When the dimming level reaches the second level, the signal generating unit stops outputting the dimming signal in accordance with the software update;
The lighting control unit controls the lighting device so that the dimming level is maintained at the second level if the dimming signal is not input.
Lighting system. After the update unit updates the software,
The lighting system according to claim 1 , wherein the lighting control unit performs fade control to gradually change the dimming level from the second level to the first level at a predetermined time change rate. The storage unit has two storage areas,
When the second acquisition unit receives the update data while the signal generation unit is executing the software stored in one of the two storage areas, the storage unit stores the update data in the other of the two storage areas;
The lighting system according to claim 1 or 2, wherein the update unit updates the software executed by the signal generation unit based on the update data when the dimming level is the second level. A communication unit for receiving a wireless signal or a wired signal,
The lighting system according to claim 1 , wherein the one communication unit functions as the first acquisition unit and the second acquisition unit. 5. The lighting system of claim 1 , further comprising an update permission unit that obtains a detection result of a human presence sensor that detects a person present within an illumination range where the lighting load emits light, and permits the lighting control unit to adjust the dimming level to the second level if a state in which the human presence sensor has not detected the person continues for a predetermined time or more. 5. The lighting system of claim 1 , further comprising an update permission unit that obtains a detection result of an illuminance sensor that detects illuminance due to light emitted by the lighting load, and, if the illuminance does not change for a predetermined time or more, permits the lighting control unit to adjust the dimming level to the second level. A lighting system according to any one of claims 1 to 6;
A lighting load that is turned on by the lighting system; and
and a fixture body supporting at least the lighting load.
lighting equipment. A number of lighting fixtures;
a master unit that transmits the update data to at least one of the plurality of lighting fixtures;
The lighting system according to claim 7, wherein each of the plurality of lighting fixtures is a lighting fixture according to claim 7. The lighting system of claim 8 , wherein the plurality of lighting fixtures includes at least one first lighting fixture that acquires the update data from the parent unit, and at least one second lighting fixture that acquires the update data from any one of the plurality of lighting fixtures. The plurality of lighting fixtures are arranged in a zone;
The lighting system of claim 8 or 9, wherein when at least one of the plurality of lighting fixtures updates the software, the parent unit adjusts the dimming levels of the lighting loads of the other lighting fixtures of the plurality of lighting fixtures so that the average illuminance of the zone becomes a predetermined value. Each of the plurality of lighting fixtures is arranged in one of a plurality of zones;
The lighting system according to claim 8 , wherein in each of the plurality of zones, among the lighting fixtures belonging to each of the plurality of zones, the lighting fixtures to be updated in the software are switched one by one in sequence. A sensor for detecting an environment within an illumination range illuminated by the light of the lighting load is further provided.
12. The lighting system of claim 8, wherein the parent unit transmits the update data to the at least one lighting fixture at least one of when the sensor is not operating in an operating mode in which the sensor detects the environment and when a state in which the detection result of the sensor does not change continues for a predetermined period of time or more.

Images