JP7283338B2 - lighting equipment - Google Patents

Description

The present disclosure relates to lighting devices.

Conventionally, various technologies have been proposed that can secure both a communication environment and a power source by connecting a lighting device via a communication cable capable of supplying power (a so-called PoE cable; Power over Ethernet; registered trademark).

JP 2017-59313 A

By the way, in some lighting devices, in addition to a lighting unit having a lighting function, a camera function for capturing an image of the surroundings of the lighting device is incorporated as an additional function other than the lighting function.

For example, some camera functions require time to start after power is supplied, and there is room for improvement in terms of responsiveness.

Therefore, the present disclosure proposes an illumination device capable of improving the responsiveness of the camera function incorporated in the illumination device.

A lighting device according to an example of an embodiment includes a power storage unit, a lighting unit, a camera unit, and a control unit. The lighting section receives power supply from the power supply section. The camera section receives power supply from the power supply section through the same power line as the lighting section. The control unit discharges the power storage unit prior to stopping the power supply to the lighting unit and the camera unit, and supplies the power discharged from the power storage unit to the camera unit when the lighting unit is turned off .

FIG. 1 is a diagram schematically showing a configuration example of a lighting system including a lighting device according to an embodiment. FIG. 2 is a block diagram illustrating an example of a functional configuration of a control unit included in the lighting device according to the embodiment; 3 is a flowchart illustrating an example of a processing procedure by a control unit included in the lighting device according to the embodiment; FIG. FIG. 4 is a diagram schematically showing a configuration example of a lighting device according to Modification 1. As shown in FIG. FIG. 5 is a diagram schematically showing a configuration example of a lighting device according to Modification 2. As shown in FIG.

A lighting device 30 according to an embodiment described below includes a power storage unit 33, a lighting unit 34, a camera unit 35, and a control unit (for example, a control unit 36). The illumination unit 34 receives power supply from a power supply unit (for example, system power supply A). The camera unit 35 receives power supply from a power supply unit (for example, system power supply A) through the same power line as that of the lighting unit 34 . The control unit (for example, the control unit 36 ) discharges the power storage unit 33 prior to stopping the power supply to the illumination unit 34 and the camera unit 35 and supplies the power discharged from the power storage unit 33 to the camera unit 35 .

Further, the control section (for example, control unit 36) according to the embodiment described below stops discharging of the power storage section 33 when the power supply to the illumination section 34 and the camera section 35 is restarted.

Further, in the illumination device 30 according to the embodiment described below, the power discharged from the power storage unit 33 is the power required to continue driving the camera unit 35 .

A lighting device 30 according to an embodiment will be described below with reference to the drawings. In the following embodiments, the same parts or components having substantially the same functions are denoted by the same reference numerals, and redundant description may be omitted.

[Embodiment]
An outline of a lighting system 1 including a lighting device 30 according to an embodiment will be described below with reference to FIG. FIG. 1 is a diagram schematically illustrating a configuration example of a lighting system including lighting devices in an embodiment.

As shown in FIG. 1, the lighting system 1 includes a management device 10, a power supply device 20, and a lighting device 30. In FIG. 1, signal lines are indicated by long chain lines, and power lines are indicated by thin solid lines.

The management device 10 is an information processing device that manages the operation status of the lighting device 30 and the like. The management device 10 is used, for example, by an administrator who manages the lighting devices 30 and the like. The management device 10 can control power supply to the lighting device 30 . For example, the management device 10 can stop power supply in conjunction with turning off the illumination device 30 (illumination unit 34). A desktop PC (Personal Computer), a notebook PC, a smart phone, a tablet terminal, or the like can be used as the management device 10, but the management device 10 is not limited to these.

The power supply device 20 is connected to a system power supply A (an example of a power supply unit), and can convert power supplied from the system power supply A into power of a predetermined standard. Here, the predetermined standard refers to DC voltage, for example, but is not limited to this.

The management device 10 and the power supply device 20 are connected via a signal line 2 capable of transmitting and receiving signals indicating various kinds of information, for example. In FIG. 1, the signal line 2 is indicated by a long chain line. Examples of various types of information transmitted and received between the management device 10 and the power supply device 20 include operation instruction information transmitted from the management device 10 to the power supply device 20 and the lighting device 30 . Further, as such various types of information, operation status information transmitted from the lighting device 30 to the management device 10 via the power supply device 20 can be exemplified. Such various types of information are not limited to these examples. Note that the management apparatus 10 and the power supply apparatus 20 may communicate with each other through wired communication, wireless communication, or communication via a network.

The power supply device 20 and the lighting device 30 are connected via the communication cable 3 . In FIG. 1, the communication cable 3 is indicated by a thick solid line. The power supply device 20 can supply power of a predetermined standard to the lighting device 30 via the communication cable 3, which will be described later.

The communication cable 3 can supply power of a predetermined standard and can transmit and receive signals. Specifically, the communication cable 3 is implemented by a so-called PoE cable that functions not only as a LAN (Local Area Network) cable for transmitting and receiving signals, but also as a power cable for supplying power to the lighting device 30 .

The illumination device 30 can illuminate a predetermined range. As the lighting device 30, for example, a base light or a spotlight installed at a predetermined installation location such as a ceiling or a floor can be exemplified, but the lighting device is not limited to these and may be any lighting device.

Lighting device 30 includes power receiving unit 31 , sensor unit 32 , power storage unit 33 , lighting unit 34 , camera unit 35 , and control unit 36 .

The power receiving unit 31 branches a signal and power supplied from the communication cable 3 connected to the primary side into a signal line 4 (indicated by a long chain line) and a power line 5 (indicated by a solid line) and outputs them to the secondary side. . The signal line 4 and the power line 5 branched by the power receiving unit 31 are connected to the control unit 36 . Various information from the management device 10 output from the power receiving unit 31 is output to the control unit 36 via the signal line 4 . The power output from the power receiving unit 31 is supplied to each part of the lighting device 30 through power lines 51 , 52 , 53 , and 54 that are in the same system as the power line 5 .

The sensor unit 32 includes, for example, a detection sensor such as a human sensor, and detects an object such as a person or an animal existing within a predetermined range that can be illuminated by the lighting device 30 . A primary side of the sensor unit 32 is connected to the power receiving unit 31 via a power line 51 branched from the power line 5 . The sensor section 32 sends the detection result to the control unit 36 through a signal line (indicated by a long chain line).

The power storage unit 33 includes a storage battery (not shown) and a control unit for the storage battery, and functions as a power supply that supplies power necessary for the operation of the camera unit 35 when the power supply from the system power supply A is stopped. . The storage battery is, for example, a rechargeable secondary battery such as a Li (lithium) ion battery.

The primary side of power storage unit 33 is connected to power receiving unit 31 via power line 52 branched from power line 5 . Electric power from the system power supply A that has been converted into electric power of a predetermined standard in the power supply device 20 is supplied to the electric storage unit 33 through the electric power receiving unit 31, the power line 5, and the electric power line 52. Charging takes place.

A secondary side of the power storage unit 33 is connected to the control unit 36 via the power line 6 . As a result, for example, when the power supply from the system power source A to each part of the lighting device 30 is stopped due to dimming (turning off) of the lighting unit 34, the power stored in the power storage unit 33 is transferred to the power line. 61 to the camera section 35 .

The power supplied from the power storage unit 33 to the camera unit 35 is predetermined power output from the power storage unit 33 as the power storage unit 33 discharges according to instructions from the control unit 36 . Such predetermined electric power may be electric power capable of continuously driving the control unit (not shown) of the camera unit 35 . For example, the camera unit 35 can continue to drive the camera unit 35 in a standby state in which the camera unit 35 immediately executes imaging processing in conjunction with lighting of the lighting unit 34 and can output acquired imaging data (for example, RAW data). It is sufficient if the power is such that it can Such electric power does not have to be less than the electric power required to restart the camera section 35 as long as the control section (not shown) of the camera section 35 can continue to be driven in the standby state.

Also, a control unit (not shown) of the power storage unit 33 can send power storage state information such as the amount of power stored in the storage battery to the control unit 36 through a signal line (indicated by a long chain line). A control unit (not shown) of the power storage unit 33 can receive a signal for instructing start or stop of discharge sent from the control unit 36 through a signal line (indicated by a long chain line).

Note that the power storage unit 33 can also function as an emergency power supply when the power supply from the system power source A stops, such as when the system power source A fails, for example.

The lighting unit 34 is connected to the power receiving unit 31 via a power line 53 branched from the power line 5 , and is supplied with power output from the power receiving unit 31 via the power line 53 to be lit. For example, the lighting unit 34 is a light source having a semiconductor light emitting element such as an LED (Light Emitting Diode).

The illumination section 34 can receive a control signal for dimming from the control unit 36 through a signal line (indicated by a long chain line). The lighting unit 34 is not limited to a configuration that changes the lighting mode according to a control signal from the control unit 36 , and may be configured to turn on or off depending on whether power is supplied from the power receiving unit 31 . Note that the lighting mode is a concept including, for example, the dimming rate, illuminance, blinking, etc. of the lighting section 40 .

The camera unit 35 includes a lens, an imaging device, and the like, and can capture an image of a predetermined range of the illumination device 30 . The camera unit 35 can, for example, perform imaging processing of a predetermined range illuminated by the illumination unit 34 in conjunction with lighting of the illumination unit 34 . A primary side of the camera section 35 is connected to the control unit 36 via the power line 54 and the power line 61 . The camera unit 35 operates by being supplied with power output from the power receiving unit 31 through the power line 54 . Also, the camera unit 35 is supplied with power output from the power storage unit 33 through the power line 61 to operate.

As shown in FIG. 1, power supplied from the system power source A is supplied to the illumination unit 34 and the camera unit 35 through power lines 53 and 54 of the same system. Therefore, when power supply from the system power supply A is stopped, power supply to both the lighting unit 34 and the camera unit 35 is stopped.

The control unit 36 is connected to the power receiving section 31 via the power line 5 . Power output from the power receiving unit 31 is supplied to the control unit 36 through the power line 5 .

The control unit 36 can exchange various information with the management device 10 through the signal line 4 . Such various information includes operation instruction information transmitted from the management device 10 to the lighting device 30, operation status information and power storage state information transmitted from the lighting device 30 to the management device 100, and the like. Not limited. The control unit 36 can control the operation of the lighting device 30 based on the operation instruction information received from the management device 10 .

Control unit 36 is connected to power storage unit 33 via power line 6 . The control unit 36 is supplied with electric power output from the electric storage unit 33 by discharging through the power line 6 . The power supplied to the control unit 36 through the power line 6 is also supplied to the camera section 35 through the power line 61 .

The control unit 36 can exchange various types of information with the power storage unit 33 through signal lines (indicated by long chain lines). Such various types of information include power storage state information notified from the power storage unit 33 to the control unit 36, a signal sent from the control unit 36 to the power storage unit 33 to instruct the start or stop of discharge, and the like, but are limited to these. not.

Based on the operation instruction information received from the management device 10 , the control unit 36 sends a signal instructing the storage unit 33 to start discharging, for example, when turning off the lighting unit 34 . When the management device 10 stops the power supply from the system power supply A to each part of the lighting device 30 , the control unit 36 supplies the power discharged from the power storage part 33 to the camera part 35 through the power line 61 . Thereby, the control unit 36 can continue to operate the control section (not shown) of the camera section 35 .

As shown in FIG. 1, when power is supplied from the system power supply A to each part of the lighting device 30 through the power line of the same system, the power supply to the lighting part 34 and the camera part 35 can be stopped at the same time. . When the power supply is stopped, the camera unit 35 stops starting and ends its operation. Here, the lighting unit 34 does not require much time to return to a state where it can be lit after being supplied with power. It takes some time to recover. For this reason, due to the time difference occurring between the recovery time of the illumination unit 34 (the time until the illumination unit 34 is ready to be lit) and the recovery time of the camera unit 35, for example, the camera unit 35 that is interlocked with the illumination of the illumination unit 34 imaging may not be realized. Therefore, the illumination device 30 according to the embodiment supplies power generated by discharging the power storage unit 33 to the camera unit 35 while the power supply from the system power supply A is stopped. Thereby, the responsiveness of the camera section 35 can be improved, and the time difference between the recovery time of the illumination section 34 and the recovery time of the camera section 35 can be shortened.

<Example of functional configuration>
A functional configuration example of the control unit 36 included in the lighting device 30 will be described with reference to FIG. 2 . FIG. 2 is a block diagram illustrating an example of a functional configuration of a control unit included in the lighting device according to the embodiment;

As shown in FIG. 2 , the control unit 36 has a storage section 361 and a control section 362 .

The storage unit 361 stores programs and data for realizing various controls of the lighting device 30 . The storage unit 361 is implemented by, for example, a semiconductor memory device such as a RAM (Random Access Memory) or a flash memory, or a storage device such as a hard disk or an optical disk.

The controller 362 is a controller that controls each part of the lighting device 30 . For example, the controller 362 can be implemented by a processor such as a CPU (Central Processing Unit) or MPU (Micro Processing Unit). Alternatively, the controller 362 may be implemented by an integrated circuit such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit).

The control unit 362 uses various memories provided inside the lighting device 30 as storage areas, and executes various processes using programs defining processing procedures and required data. The control unit 362 includes an illumination control unit 362a, a camera control unit 362b, a discharge control unit 362c, and a power supply control unit 362d.

The illumination control unit 362 a controls the illumination mode of the illumination unit 34 based on the detection result from the sensor unit 32 while power is being supplied to the illumination unit 34 . For example, the illumination control unit 362a turns on the illumination unit 34 based on the detection result of the sensor unit 32. FIG. Further, when the lighting control unit 362a receives operation instruction information for turning off the lighting unit 34 from the management device 10, the lighting control unit 362a turns off the lighting unit 34. FIG.

The camera control unit 362b controls so that the imaging process of the camera unit 35 is performed in conjunction with the control of the illumination unit 34 by the illumination control unit 362a. For example, the camera control unit 362b sends a signal to the camera unit 35 to instruct imaging of a predetermined range illuminated by the illumination unit 34 in conjunction with lighting of the illumination unit 34 by the illumination control unit 362a.

For example, when the management device 10 stops the supply of power from the system power source A to each part of the lighting device 30 in conjunction with turning off the illumination unit 34, the discharge control unit 362c controls the power supply from the system power source A to the camera unit 35. Prior to stopping the power supply, the power storage unit 33 is discharged. Specifically, based on the operation instruction information received from the management device 10, the discharge control unit 362c instructs the power storage unit 33 to start discharging when, for example, the lighting control unit 362a turns off the lighting unit 34. send a signal. On the other hand, the discharge control unit 362c discharges to the power storage unit 33 when the management apparatus 10 restarts the supply of power from the system power supply A to each unit of the lighting device 30 in conjunction with lighting of the lighting unit 34, for example. send a signal to stop

The power supply control unit 362 d supplies the camera unit 35 with electric power to be discharged from the power storage unit 33 prior to stopping the power supply from the system power source A to the camera unit 35 . Specifically, when the discharge control unit 362 c sends a signal instructing the electricity storage unit 33 to start discharging, the power supply control unit 362 d transfers the power output from the electricity storage unit 33 due to the discharge through the power line 61 . , to the camera unit 35 . On the other hand, the power supply control unit 362d, for example, in conjunction with the lighting of the lighting unit 34, when the management device 10 restarts the supply of power from the system power supply A to each unit of the lighting device 30, the power supply control unit 362d resume power supply to That is, when a signal instructing to stop discharging is sent from the discharge control unit 362 c to the power storage unit 33 , the power output from the power receiving unit 31 (power from the system power supply A) is transmitted to the camera unit 35 through the power line 54 . supply to

<Processing procedure example>
An example of a processing procedure by the control section 362 included in the control unit 36 will be described with reference to FIG. 3 is a flowchart illustrating an example of a processing procedure by a control unit included in the lighting device according to the embodiment; FIG.

As shown in FIG. 3, the control unit 362 determines whether power supply from the system power supply A to each unit of the lighting device 30 is stopped (step S1). For example, when the control unit 362 receives operation instruction information for turning off the illumination unit 34 from the management device 10, it determines that power supply is to be stopped.

When the control unit 362 determines that the power supply from the system power supply A to each unit of the lighting device 30 is not stopped (step S1; No), the processing procedure shown in FIG. 3 ends.

On the other hand, when the control unit 362 determines that the power supply from the system power source A to each unit of the lighting device 30 is stopped (step S1; Yes), it sends a signal instructing the electricity storage unit 33 to start discharging. (step S2).

Subsequently, the control unit 362 supplies the electric power output from the power storage unit 33 by discharging to the camera unit 35 through the power line 61 (step S3).

Subsequently, the control unit 362 determines whether power supply from the system power source A to each unit of the lighting device 30 is resumed (step S4). For example, when receiving operation instruction information for turning on the illumination unit 34 from the management apparatus 10, the control unit 362 determines that power supply is restarted.

When the control unit 362 determines from the management device 10 that the power supply from the system power supply A to each unit of the lighting device 30 is not restarted (Step S4; No), the control unit 362 repeats the determination of Step S4.

On the other hand, when the control unit 362 determines that the power supply from the system power source A to each unit of the lighting device 30 is restarted from the management device 10 (step S4; Yes), the control unit 362 instructs the power storage unit 33 to stop discharging. An instruction signal is sent (step S5), and the processing procedure shown in FIG. 3 ends.

In step S2 described above, the signal instructing the start of discharge sent from the control unit 362 to the power storage unit 33 is output to the power supply device 20 through the signal line 4, and is sent from the power supply device 20 through the signal line 2 to the management device 10. may be sent to The management device 10 confirms that a signal instructing the start of discharge has been sent to the power storage unit 33, and instructs the power supply device 20 to stop supplying power from the system power supply A to each part of the lighting device 30. can be sent. As a result, in the lighting device 30, the power storage unit 33 starts discharging before the power supply from the system power supply A is stopped, and the power generated by this discharge is used as the power for operating the control unit 36 and the camera unit 35. supplied.

In the above step S5, the signal instructing to stop discharging sent from the control unit 362 to the power storage unit 33 is output to the power supply device 20 through the signal line 4, and is sent from the power supply device 20 through the signal line 2 to the management device 10. may be sent to The management device 10 confirms that a signal instructing to stop discharging has been sent to the power storage unit 33, and instructs the power supply device 20 to supply power from the system power supply A to each part of the lighting device 30. can be sent. As a result, the charging of the storage battery included in the power storage unit 33 in the lighting device 30 is resumed without delay.

As described above, the lighting device 30 according to the embodiment includes the power storage unit 33, the lighting unit 34, the camera unit 35, and the control unit 36 (an example of the control unit). The control unit 36 discharges the power storage unit 33 when the lighting unit 34 is turned off, and supplies the power discharged from the power storage unit 33 to the camera unit 35 instead of the power from the system power source A whose supply is stopped. As a result, the control unit (not shown) of the camera unit 35 can continue to operate. As a result, the time required to activate the camera can be shortened and the responsiveness of the camera can be improved, compared to the case where the power supply to the camera unit 35 is stopped, the activation is completely stopped, and then the activation is restarted. For example, the camera can be activated quickly in conjunction with the lighting of the illumination unit 34 .

In addition, in the lighting device 30 according to the embodiment, the control unit 36 (an example of the control section) restarts the supply of power from the system power source A to the camera section 35 when the lighting section 34 that has been turned off is turned on again. Thereby, the electric storage unit 33 can be charged.

Further, in the embodiment, the power discharged from the power storage unit 33 is the power required to continue driving the camera unit 35 . This makes it possible to effectively utilize the power generated by the periodic discharge to maintain the power storage performance of the power storage unit 33 and improve the responsiveness of the camera unit 35 .

[Modification 1 of lighting device]
Modification 1 of lighting device 30 will be described below. FIG. 4 is a diagram schematically showing a configuration example of a lighting device according to Modification 1. As shown in FIG.

As shown in FIG. 4, the illumination device 30 according to the modification differs from the above-described embodiment in that it includes a thermoelectric conversion unit 37 and that power is not supplied from the system power supply A to the electricity storage unit 33. do.

The thermoelectric conversion unit 37 includes a semiconductor element such as a Peltier element, an external load, and the like, and converts heat generated in the lighting device 30 into electric power by thermoelectric power generation that converts thermal energy into electrical energy. A secondary side of the thermoelectric conversion section 37 is connected to the control unit 36 via the power line 7 . The thermoelectric conversion unit 37 supplies electric power generated by thermoelectric generation to the control unit 36 through the power line 7 .

The control unit 36 supplies electric power from the thermoelectric conversion unit 37 supplied through the power line 7 to the electricity storage unit 33 . The primary side of power storage unit 33 is connected to control unit 36 via power line 71 . Electric power generated by the thermoelectric conversion unit 37 is supplied to the power storage unit 33 through the power line 71, and the storage battery included in the power storage unit 33 is charged.

According to Modification 1, even if power is not supplied from system power source A to power storage unit 33, heat that is inevitably generated in lighting device 30 is effectively utilized and the heat is converted into power. , energy regeneration of the power storage unit 33 can be realized. This makes it possible to improve the responsiveness of the camera section 35 while saving power.

Note that in the first modification described above, when the power supplied from the power storage unit 33 to the camera unit 35 by discharging is less than the power required to drive the camera unit 35, the control unit 36 supplies the power through the power line 80. The electric power from the thermoelectric conversion unit 37 may be combined and supplied to the camera unit 35 .

[Modification 2 of lighting device]
Modification 2 of lighting device 30 will be described below. FIG. 5 is a diagram schematically showing a configuration example of a lighting device according to Modification 2. As shown in FIG.

As shown in FIG. 5 , a lighting device 30 according to Modification 2 differs from Modification 1 in that electric power is supplied from system power source A to power storage unit 33 .

As shown in FIG. 5 , the lighting device 30 may also include the thermoelectric conversion section 37 when the power from the system power supply A is used to charge the storage battery of the power storage section 33 . The lighting device 30 according to Modification 2 uses the thermoelectric conversion unit 37 as an auxiliary power source when the electric power supplied from the power storage unit 33 to the camera unit 35 by discharging is less than the electric power required to drive the camera unit 35. The power generated can be used.

[others]
In the above embodiments and modifications, an external power storage unit having the same function as the power storage unit 33 may be provided outside the lighting device 30 instead of the power storage unit 33 included in the lighting device 30 . In this case, the external power storage unit directly controls charging and discharging of power supplied from system power source A via power supply device 20 . Then, the external power storage unit performs discharging based on the stoppage of the power supply from system power supply A to each unit of lighting device 30 . The lighting device 30 supplies power discharged from the external power storage unit to the camera section 35 .

Although the embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. As well as being included in the scope and gist of the invention, this embodiment is included in the scope of the invention described in the claims and equivalents thereof. Moreover, this embodiment can be appropriately combined within a range that does not contradict the processing contents.

Also, the effects described in this specification are only examples and are not limited, and other effects may be provided.

1 lighting system 2 signal line 3 communication cable 4 signal line 5 power line 6 power line 7 power line 10 management device 20 power supply device 30 lighting device 31 power receiving unit 32 sensor unit 33 power storage unit 34 lighting unit 35 camera unit 36 control unit 37 thermoelectric conversion unit 51 Power line 52 Power line 53 Power line 54 Power line 61 Power line 71 Power line 361 Storage unit 362 Control unit 362a Lighting control unit 362b Camera control unit 362c Discharge control unit 362d Power supply control unit A System power supply

Claims (3)

a power storage unit;
a lighting unit powered by a power supply unit;
a camera unit that receives power supply from the power supply unit through the same power line as that of the lighting unit;
a control unit;
and
The control unit
discharging the power storage unit prior to stopping the power supply to the lighting unit and the camera unit, and supplying the camera unit with the power discharged from the power storage unit when the lighting unit is turned off ;
lighting device. The control unit
The lighting device according to claim 1, wherein discharging of the power storage unit is stopped when power supply to the lighting unit and the camera unit is restarted. 2. The lighting device according to claim 1, wherein the electric power discharged from the power storage unit is electric power of a magnitude necessary to keep driving the camera unit.

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