JP7369950B2 - Luminaires and lighting control systems - Google Patents

Description

TECHNICAL FIELD This disclosure relates to lighting fixtures and lighting control systems.

Traditionally, when multiple communication protocols were used to control lighting, it was necessary to manually switch switches on the lighting equipment. Patent Document 1 discloses a lighting fixture that can individually control a plurality of lighting control units with one signal from a lighting control device.

JP2019-204718A

However, the lighting fixture disclosed in Patent Document 1 cannot switch the corresponding communication protocol by itself.

Therefore, the present disclosure provides a lighting fixture and a lighting control system that can switch the communication protocol used when the lighting fixture communicates with a control device.

A lighting fixture according to an aspect of the present disclosure is a lighting fixture connected to a lighting control device, and includes a light source that irradiates light, a signal transmitting and receiving section that transmits and receives signals to and from the lighting control device, and the signal transmitting and receiving section. a signal analysis unit that determines which of two or more different communication protocols the signal received by the device corresponds to, and analyzes the signal based on the determined communication protocol; a light source control unit that controls the light source according to the analysis result, and the signal analysis unit determines whether the signal Determine the compatible communication protocols.

A lighting control system according to one aspect of the present disclosure includes a lighting fixture and a lighting control device.

A lighting fixture or the like according to one aspect of the present disclosure can switch a communication protocol used when communicating with a control device.

FIG. 1 is a diagram illustrating a conventional example of whether or not lighting equipment is compatible with communication protocols when there are a plurality of lighting control devices. FIG. 2 is a diagram showing how the lighting fixture of the present disclosure corresponds to a plurality of lighting control devices. FIG. 3 is a diagram showing start codes in DALI and communication protocols different from DALI, and signal levels representing logical values 1 and 0. FIG. 4 is a diagram illustrating the principle of communication protocol determination in the lighting fixture of the present disclosure. FIG. 5 is a diagram schematically illustrating communication protocol determination in the lighting fixture of the present disclosure. FIG. 6 is a block diagram of a lighting fixture of the present disclosure. FIG. 7 is a flowchart showing processing performed by the lighting fixture of the present disclosure. FIG. 8 is a block diagram illustrating another example of the lighting fixture of the present disclosure. FIG. 9 is a diagram illustrating another method for determining a communication protocol in the lighting fixture of the present disclosure.

Embodiments will be described below with reference to the drawings. Note that the embodiments described below are all inclusive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples, and do not limit the present disclosure. Further, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims will be described as arbitrary constituent elements.

Note that each figure is a schematic diagram and is not necessarily strictly illustrated. Furthermore, in each figure, substantially the same configurations are denoted by the same reference numerals, and overlapping explanations may be omitted or simplified.

(Embodiment)
[Conventional example and lighting fixture of the present disclosure]
FIG. 1 is a diagram illustrating a conventional example of whether a lighting fixture 10 is compatible with a communication protocol when there are a plurality of lighting control devices 11. Conventionally, the operator 3 who operates the lighting control device 11 switches the plurality of lighting control devices 11 and causes the plurality of lighting fixtures 20 to transmit signals.

For example, when the operator 3 causes the lighting control device 11a, which transmits signals using DALI (Digital Addressable Lighting Interface), to transmit signals to a plurality of lighting fixtures 20, the lighting fixtures 20a and 20b, including the lighting fixtures 20a and 20b compatible with DALI, A plurality of lighting fixtures 20 can analyze signals from the lighting control device 11a and be controlled.

However, when the operator 3 causes the lighting control device 11b, which transmits signals using a communication protocol different from DALI, to transmit signals to the plurality of lighting fixtures 20, the plurality of lighting fixtures 20 including 20a and 20b are Since the communication protocol supported by the control device 11b is not supported, it is not possible to analyze the signal from the lighting control device 11b and receive control.

Furthermore, even if the lighting fixture 20 is compatible with multiple communication protocols, the operator 3 or the like has to manually change the corresponding communication protocol by switching a switch or the like provided in the lighting fixture 20, for example. .

Thus, conventionally, it has not been possible to switch the communication protocol supported by the lighting fixture 20 to the communication protocol supported by the lighting control device 11 by oneself.

Next, a description will be given of how the lighting fixture 10 of the present disclosure switches a corresponding communication protocol from among a plurality of communication protocols by itself. FIG. 2 is a diagram showing how the lighting fixture 10 of the present disclosure corresponds to a plurality of lighting control devices 11.

As in the above case, a case will be considered in which the operator 3 switches between the plurality of lighting control devices 11 and causes the plurality of lighting fixtures 10 to transmit signals. For example, if the operator 3 causes the lighting control device 11a that transmits a signal using DALI to transmit a signal to a plurality of lighting fixtures 10, a plurality of lighting fixtures 10 including lighting fixtures 20c and 20d compatible with DALI , the signal from the lighting control device 11a can be analyzed and controlled.

Further, even if the operator 3 causes the lighting control device 11b, which transmits signals using a communication protocol different from DALI, to transmit signals to a plurality of lighting devices 10, the lighting control device 11b does not correspond to the lighting devices 10. Since the lighting device 10 can also support communication protocols such as those described above, a plurality of lighting devices 10 including the lighting devices 20c and 20d can analyze signals from the lighting control device 11b and be controlled.

That is, the lighting fixture 10 can determine which communication protocol the transmitted signal is based on among a plurality of communication protocols, and can respond to the determined communication protocol. Here, being compatible with the communication protocol means that the lighting fixture 10 analyzes the transmitted signal and executes the command, that is, the lighting fixture 10 receives control from the lighting control device 11 that transmitted the signal. .

[Details of signals in DALI etc.]
Next, details of the signals received and analyzed by the lighting fixture 10 will be explained based on standards such as DALI. FIG. 3 is a diagram showing start codes in DALI and communication protocols different from DALI, and signal levels representing logical values 1 and 0. Here, the communication protocol different from DALI is a communication protocol compatible with UART.

(a) of FIG. 3 shows a signal level representing a logical value "0" or "1" in DALI. When a logical value "0" is expressed in DALI, one bit of signal level LOW is sent immediately after one bit of signal level HIGH is sent. Further, when the logical value "1" is expressed in DALI, one bit of signal level HIGH is sent immediately after one bit of signal level LOW is sent. In DALI, the time required for transmitting a 2-bit signal representing a logical value of "0" or "1" is, for example, 833 us (μ seconds).

In DALI, for example, the start bit (STR) is 1 bit, the address (ADR) is 8 bits, the operation code (OPC) is 8 bits, and the stop bit (SPB) is 2 bits. Further, in DALI, data formats are set in the order of STR, ADR, CMD, and STP.

(b) of FIG. 3 shows a signal level representing a logical value "0" or "1" in a communication protocol different from DALI. When a logical value "0" is expressed in DALI, one bit of signal level HIGH is sent immediately after one bit of signal level LOW is sent. Further, in a certain communication protocol different from DALI, when a logical value "1" is expressed, two bits of signal level HIGH are sent. In a communication protocol different from DALI, the time required for transmitting a 2-bit signal representing a logical value of "0" or "1" is, for example, 208 us (μ seconds).

In a communication protocol different from DALI, for example, the start code (STC) is 1 bit, and the start code (STC) is set to be followed by an address (ADR) or the like by an arbitrary number of bits.

FIG. 3(c) is a diagram showing the start bit in DALI. The start bit in DALI is a 2-bit signal in which one bit of signal level HIGH is sent immediately after one bit of signal level LOW is sent.

FIG. 3(d) is a diagram showing a start code in a communication protocol different from DALI. The start code in a communication protocol different from DALI is a signal in which two bits of signal level LOW are sent.

Note that here, the signal level HIGH and the signal level LOW do not necessarily mean that the voltage is high or that the voltage is low. The signal level HIGH and the signal level LOW merely represent that the voltages are different from each other.

[Principle of communication protocol determination using lighting equipment]
Next, the principle of how the lighting fixture 10 determines the communication protocol based on the signal transmitted from the lighting control device 11 will be explained. FIG. 4 is a diagram illustrating the principle of communication protocol determination in the lighting fixture 10 of the present disclosure. Further, FIG. 6 is a block diagram of the lighting fixture of the present disclosure.

First, the signal transmitting/receiving unit 12 of the lighting fixture 10 reads a signal in accordance with a baud rate of a communication protocol different from DALI. Consider a case where the signal transmitting/receiving unit 12 receives a signal based on a communication protocol different from DALI. At this time, when the signal transmitter/receiver 12 reads the signal in accordance with the baud rate of a communication protocol different from DALI, the first and second bits are a start code (STC). A start code (STC) of a communication protocol different from DALI is a signal that is followed by two bits with a signal level of LOW.

(a) of FIG. 4 shows a case where the beginning of the address (ADR) of a signal based on a communication protocol different from DALI represents 0. When the beginning of the address (ADR) of a signal based on a communication protocol different from DALI represents 0, the signal level of the third bit is LOW, and the signal level of the fourth bit is HIGH.

(b) of FIG. 4 shows a case where the beginning of the address (ADR) of a signal based on a communication protocol different from DALI represents 1. When the beginning of an address (ADR) of a signal based on a communication protocol different from DALI represents 1, the signal level of the third bit is HIGH, and the signal level of the fourth bit is HIGH.

That is, when the signal transmitting/receiving unit 12 reads a signal at a baud rate of a communication protocol different from DALI, the fourth bit is always HIGH if the transmitted signal is based on a communication protocol different from DALI.

Next, consider a case where the signal transmitting/receiving unit 12 receives a signal based on DALI. At this time, when the signal transmitting/receiving unit 12 reads the signal according to the baud rate of the communication protocol different from DALI, if the baud rate of DALI is an integral multiple of 4 times or more of the baud rate of the communication protocol different from DALI, the first to fourth The bit is the start bit (STB). For example, when the baud rate of DALI is four times the baud rate of a communication protocol different from DALI, and when the signal transmitter/receiver 12 reads the signal in accordance with the baud rate of the communication protocol different from DALI, the start bit (STB) of DALI is This is a signal in which four bits of signal level LOW immediately follow four bits of signal level HIGH. In (a) and (b) of FIG. 4, the signal based on DALI has a signal level of LOW for all four bits from the start of the signal (the first fall of the signal level).

Therefore, the signal analysis unit 13 of the lighting fixture 10 determines whether the protocol on which the transmitted signal is based is DALI or a communication protocol different from DALI by determining whether the fourth read bit is HIGH. This determination is based on the premise that the signal transmitter/receiver 12 reads the signal in accordance with the baud rate of a communication protocol different from DALI, and that the baud rate of DALI is an integral multiple of four times or more the baud rate of the communication protocol different from DALI. be done. Specifically, the signal analysis unit 13 determines that the received signal is based on a communication protocol different from DALI when the fourth bit from the start of the signal is HIGH. On the other hand, the signal analysis unit 13 determines that the received signal is based on DALI when the fourth bit from the start of the signal is LOW.

[Outline of communication protocol determination by lighting equipment]
Next, an outline of how the lighting fixture 10 determines the communication protocol based on the signal transmitted from the lighting control device 11 will be described. FIG. 5 is a diagram schematically showing communication protocol determination in the lighting fixture 10 of the present disclosure.

Consider a case where the lighting control device 11 transmits a signal based on DALI to the lighting fixture 10. First, the lighting control device 11 transmits a signal based on a data format configured in the order of STB, ADR, CMD, and STP. The transmitted signal is, for example, "1 11111111 10011001 HH". This signal is Manchester encoded. Further, the baud rate is transmitted at 1200 bps.

The signal after Manchester encoding becomes "01 0101010101010101 0110100101101001 1111". The signal transmitting/receiving unit 12 reads the Manchester encoded signal at a baud rate of 4880 bps. When the signal transmitter/receiver 12 reads the Manchester encoded signal at 4880 bps, the baud rate of the Manchester encoded signal is four times slower than the baud rate at which the signal transmitter/receiver 12 reads the signal. becomes "00001111...".

In other words, when the signal transmitter/receiver 12 reads a signal at 4880 bps, the fourth detected bit becomes 0. Here, the bit being 0 may indicate that the signal level is HIGH. Conversely, a bit of 0 may indicate that the signal level is LOW. In any case, any communication protocol different from DALI may be used as long as it represents the signal level that will always be taken at the fourth bit detected when the signal is read at 4880 bps. Therefore, the signal analysis unit 13 determines that the signal transmitted from the lighting control device 11 is a signal based on DALI. The signal analysis unit 13 then analyzes the signals sent thereafter as signals based on DALI.

The above processing is realized by a microcomputer that receives a signal from the controller through a signal reading port. The microcontroller sends the analyzed signals to the light fixtures and controls them.

Note that the communication protocol determination described above is performed each time a start bit or start code is transmitted. Alternatively, the determination of the communication protocol described above may not be performed for a predetermined period of time even if the start code or start bit is transmitted after the determination has been made once. In that case, at the beginning of the predetermined period, the signal is analyzed for a predetermined period using the communication protocol determined to be based on which the signal transmitted from the lighting control device 11 is based.

[Lighting equipment configuration]
Next, the components of the lighting fixture 10 will be explained. In FIG. 6, not only the lighting fixture 10 but also the lighting control device 11 is illustrated, and the lighting fixture 10 and the lighting control device 11 constitute a lighting control system 30. That is, the lighting control system 30 includes the lighting fixture 10 and the lighting control device 11.

The lighting fixture 10 includes a signal transmitter/receiver 12 , a signal analyzer 13 , and a light source controller 14 . The lighting fixture 10 is a so-called ceiling light that illuminates a room, and is dimmed and controlled by a controller illustrated in FIG. Note that the aspect of the lighting fixture 10 is not limited to a ceiling light having a rectangular shape in plan view, but may be a ceiling light, a spotlight, a base light, a down light, etc. having a circular shape in plan view. The lighting fixture 10 receives a signal from the lighting control device 11 and emits light.

The signal transmitting/receiving unit 12 receives a signal transmitted from the lighting control device 11 and transmits a reply signal to the lighting control device 11 according to the received signal. The signal transmitter/receiver 12 may be a communication circuit that performs wireless communication or may be a communication circuit that performs wired communication. The signal transmitting/receiving unit 12 receives a signal in accordance with the highest baud rate among the baud rates of a plurality of communication protocols that the lighting fixture 10 supports.

The signal analyzer 13 analyzes the signal received by the signal transmitter/receiver 12. The signal analysis unit 13 determines the communication protocol on which the received signal is based, depending on whether the signal level represented by a specific bit is HIGH or LOW. For example, the signal analysis unit 13 may determine whether the signal level of the fourth bit of the received signal is HIGH. The signal analyzer 13 analyzes the signal received by the signal transmitter/receiver 12 based on the communication protocol determined to be based on the received signal, and transmits the analyzed result to the light source controller 14. Specifically, the signal analysis unit 13 is realized by a processor, a microcomputer, or a dedicated circuit, and a program executed by them.

The light source control unit 14 controls the light source based on the analysis result of the signal transmitted from the signal analysis unit 13. Specifically, the light source control unit 14 is realized by a processor, a microcomputer, or a dedicated circuit and a program executed by them. Although not shown, the light source control unit 14 drives the light source via a drive circuit. The light source is an illumination light source that emits white light. The light source is realized by, for example, an LED (Light Emitting Diode), but may be realized by other light emitting elements such as an organic EL (Electro-Luminescence).

The lighting control device 11 transmits a signal for controlling the lighting equipment 10 to the lighting equipment 10 based on a specific communication protocol. The lighting control device 11 includes a communication circuit, a memory, a processor, a microcomputer, or a dedicated circuit. A single lighting control device 11 may be compatible with multiple communication protocols.

[Lighting equipment treatment]
Next, the processing performed by the lighting fixture 10 will be explained. FIG. 7 is a flowchart showing the processing performed by the lighting fixture 10 of the present disclosure.

First, the signal transmitting/receiving section 12 receives a signal from the lighting control device 11 (step S100).

Next, the signal analysis unit 13 detects the first falling edge of the signal (step S101). That is, the signal analysis unit 13 detects the start code or start bit. The start code or start bit may be any signal that represents the beginning of the signal to be transmitted.

Subsequently, after detecting the first falling edge of the received signal, the signal analysis unit 13 determines whether the first rising edge of the signal has been detected (step S102). That is, in step S101, the signal analysis unit 13 determines whether or not the first rising edge of the signal is detected after receiving the start code or start bit.

If the signal analysis unit 13 determines that the first fall of the received signal has been detected and then the first rise of the signal (Yes in step S102), the signal analysis unit 13 determines whether the signal level of the fourth bit of the received signal is HIGH (step S103).

If the signal analysis unit 13 determines that the first rising edge of the received signal has not been detected after detecting the first falling edge of the received signal (No in step S102), the lighting equipment 10 returns to the process of step S100.

If the signal analysis unit 13 determines that the signal level of the fourth bit of the received signal is HIGH (Yes in step S103), the signal analysis unit 13 determines that the received signal is based on a communication protocol different from DALI. It is determined that there is one (step S104).

If the signal analysis unit 13 determines that the signal level of the fourth bit of the received signal is not HIGH (No in step S103), the signal analysis unit 13 determines that the received signal is based on DALI (step S105).

In this way, the lighting fixture 10 can determine the type of communication protocol on which the received signal is based by determining the signal level of a specific bit of the received signal.

(Embodiment 2)
[Another configuration of lighting equipment]
Next, the components of the lighting fixture 10a will be explained. FIG. 8 is a block diagram showing another example of the lighting fixture 10 of the present disclosure. Among the components of the lighting fixture 10a, descriptions of the parts common to those of the lighting fixture 10 will be omitted.

The lighting fixture 10a includes a signal transmitter/receiver 12, a first signal analyzer 13a, a second signal analyzer 13b, and a light source controller 14.

The first signal analysis section 13a analyzes the signal received by the signal transmission/reception section 12 as a signal based on DALI. The first signal analysis section 13a transmits the result of analyzing the received signal to the light source control section 14.

The second signal analysis section 13b analyzes the signal received by the signal transmission/reception section 12 as a signal based on a communication protocol different from DALI. The second signal analysis section 13b transmits the result of analyzing the received signal to the light source control section 14.

The light source control section 14 controls the light source based on the analysis results received from the first signal analysis section 13a and the second signal analysis section 13b. If the signal received by the signal transmitter/receiver 12 is based on DALI, the result analyzed by the first signal analyzer 13a is correct, so the light source controller 14 The light source can be controlled by

At this time, the analysis result of the second signal analysis section 13b is also transmitted to the light source control section 14. However, since the signal received by the signal transmitter/receiver 12 is based on DALI, the analysis result from the second signal analyzer 13b that analyzes the signal based on a communication protocol different from DALI is not used as a control signal. It doesn't make sense. Therefore, even if the light source control section 14 receives the analysis result from the second signal analysis section 13b, it cannot control the light source according to the analysis result.

On the other hand, if the signal received by the signal transmitter/receiver 12 is based on a communication protocol different from DALI, the result analyzed by the second signal analyzer 13b will be correct, so the light source controller 14 The light source can be controlled based on the analysis result of the section 13b.

At this time, the analysis result of the first signal analysis section 13a is also transmitted to the light source control section 14. However, since the signal received by the signal transmitter/receiver 12 is based on a communication protocol different from DALI, the analysis result from the first signal analyzer 13a that analyzes the signal based on DALI has no meaning as a signal for control. Don't do it. Therefore, even if the light source control section 14 receives the analysis result from the first signal analysis section 13a, it cannot control the light source according to the analysis result.

(Embodiment 3)
[Another method for determining communication protocols using lighting equipment]
Next, another method of communication protocol determination by the lighting fixture 10 will be described. FIG. 9 is a diagram illustrating another method of determining a communication protocol in the lighting fixture 10 of the present disclosure.

Consider a case where the difference in baud rate between two communication protocols to be determined is an integral multiple. Here, the two communication protocols to be determined are the same type of communication protocol using the Manchester encoding method, and differ from each other only in baud rate. In FIG. 9, the baud rate of the communication protocol based on the signal represented by the solid line is higher than the baud rate of the communication protocol based on the signal represented by the dotted line. In the example shown in FIG. 9, the signal level of the signal represented by the dotted line does not change among the bits detected between the first and fourth bits. Similarly, the signal indicated by the dotted line does not change in signal level among the bits detected between the fifth and eighth bits. However, in the signal represented by the solid line, the signal level changes among the bits detected between the first and fourth bits. Moreover, the signal level of the signal represented by the solid line changes among the bits detected between the fifth and eighth bits. The type of communication protocol is determined using the difference in characteristics between the signal represented by the dotted line and the signal represented by the solid line, as described above.

That is, when signals based on mutually different communication protocols are transmitted at two different baud rates, the signal analysis unit 13 determines the type of communication protocol based on the difference in signal levels of two specific bits. Specifically, if the signal levels of the 2n+1-th and 2n+2-th bits are different from each other, the signal analysis unit 13 determines that the signal received by the signal transmitting/receiving unit 12 is a signal based on a communication protocol with a high baud rate. On the other hand, if the signal levels of the 2n+1-th and 2n+2-th bits are the same, the signal analysis unit 13 determines that the signal received by the signal transmitting/receiving unit 12 is a signal based on a communication protocol with a low baud rate.

Here, the bits used for determination are the 2n+1st and 2n+2nd bits, but the bits used for determination are not limited to this. Any bit may be used for the determination as long as the bits that cause periodic differences between signals based on different communication protocols, which occur based on the difference in baud rate between the two communication protocols, are to be compared.

Note that in the description of FIGS. 1 to 9, the communication protocol that is described as a communication protocol different from DALI consistently refers to one type of communication protocol. However, there may be multiple communication protocol candidates different from DALI applied to the present disclosure.

[Effects etc.]
The lighting fixture 10 is connected to a lighting control device 11, and includes a light source that emits light, a signal transmitting and receiving section 12 that transmits and receives signals to and from the lighting control device 11, and a signal that is received by the signal transmitting and receiving section 12. A signal analysis unit 13 that determines which of two or more different communication protocols the signal corresponds to and analyzes the signal based on the determined communication protocol; and a light source control unit 14 that controls the light source, and the signal analysis unit 13 determines the communication protocol to which the signal corresponds based on the difference in logic of the signal caused by the difference in baud rate of two or more communication protocols. do.

Thereby, when receiving signals based on a plurality of different communication protocols, the lighting fixture 10 can analyze the signals according to the communication protocol on which the received signals are based and control the light source. Therefore, the lighting fixture 10 can correspond to a plurality of lighting control devices 11, respectively, or to a lighting control device 11 compatible with a plurality of communication protocols.

Further, for example, in the lighting fixture 10, the signal analysis unit 13 detects the bit of the signal according to the highest baud rate among the baud rates of two or more communication protocols, and after detecting the first falling edge of the signal, The communication protocol to which the signal corresponds is determined based on the timing at which the first rise of the signal is detected.

Thereby, the lighting fixture 10 can accurately discriminate between two or more communication protocols.

Further, for example, in the lighting fixture 10, among the two or more communication protocols, the first communication protocol is DALI, and among the two or more communication protocols, the second communication protocol is compatible with UART. It is a communication protocol different from DALI, and the encoding method of the second communication protocol is an encoding method in which the signal includes a signal level HIGH regardless of whether the signal represents a logic "1" or "0". It is.

Thereby, the lighting fixture 10 can determine the communication protocol on which the received signal is based by determining the signal level of a specific bit of the received signal.

For example, in the lighting fixture 10, the baud rate of the second communication protocol is an integer multiple of four times or more the baud rate of DALI, and the encoding method of the second communication protocol is such that the signal level of the signal is LOW. When the signal level is HIGH immediately after HIGH, the signal level of the signal is HIGH, and the signal level is HIGH, the signal level is HIGH, it is logic 1.

Accordingly, the lighting fixture 10 determines the signal level at a specific bit of the received signal.For example, the lighting fixture 10 determines the signal level at a specific bit of the received signal.For example, the lighting fixture 10 determines the signal level of a specific bit of the received signal. .

Thereby, by determining the signal level of a specific bit of the received signal, the lighting fixture 10 can distinguish between signals having different baud rates even if they are of the same type of communication protocol.

Further, the lighting control system 30 includes a lighting fixture 10 and a lighting control device 11.

Thereby, the lighting control system 30 can achieve the same effects as the lighting fixture 10.

[others]
Although the embodiments have been described above, the present disclosure is not limited to the above embodiments.

For example, in the embodiments described above, the processing executed by a specific processing unit may be executed by another processing unit. Further, the order of the plurality of processes may be changed, or the plurality of processes may be executed in parallel.

Furthermore, in the embodiments described above, each component may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

Moreover, each component may be realized by hardware. For example, each component may be a circuit (or integrated circuit). These circuits may constitute one circuit as a whole, or may be separate circuits. Further, each of these circuits may be a general-purpose circuit or a dedicated circuit.

Additionally, general or specific aspects of the present disclosure may be implemented in a system, apparatus, method, integrated circuit, computer program, or computer readable storage medium such as a CD-ROM. Additionally, general or specific aspects of the present disclosure may be implemented in any combination of systems, devices, methods, integrated circuits, computer programs, and storage media.

For example, the present disclosure may be realized as a program for causing a computer to execute the communication protocol determination method executed by the lighting fixture 10 of the above embodiment. The present disclosure may be realized as a computer-readable non-transitory recording medium on which such a program is recorded.

Other embodiments may be obtained by making various modifications to each embodiment that a person skilled in the art would think of, or may be realized by arbitrarily combining the components and functions of each embodiment without departing from the spirit of the present disclosure. These forms are also included in the present disclosure.

11, 11a, 11b Lighting control device 10, 10a, 20, 20a, 20b, 20c, 20d Lighting fixture 12 Signal transmission/reception section 13 Signal analysis section 14 Light source control section 30 Lighting control system

Claims (6)

A lighting fixture connected to a lighting control device,
a light source that emits light;
a signal transmitting and receiving unit that transmits and receives signals to and from the lighting control device;
a signal analysis unit that determines which of two or more different communication protocols the signal received by the signal transmission/reception unit corresponds to, and analyzes the signal based on the determined communication protocol;
a light source control unit that controls the light source according to the analysis result performed by the signal analysis unit,
The signal analysis unit determines a communication protocol to which the signal corresponds based on a difference in logic of the signal caused by a difference in baud rate between the two or more communication protocols.
lighting equipment. The signal analysis unit detects bits of the signal according to the highest baud rate among the baud rates of the two or more communication protocols,
After detecting the first falling edge of the signal, determining a communication protocol to which the signal corresponds based on the timing at which the first rising edge of the signal was detected;
The lighting fixture according to claim 1. Among the two or more communication protocols, the first communication protocol is DALI (Digital Addressable Lighting Interface),
Among the two or more communication protocols, the second communication protocol is a communication protocol different from DALI and compatible with UART (Universal Asynchronous Receiver/Transmitter),
The encoding method of the second communication protocol is an encoding method in which the signal includes a signal level HIGH regardless of whether the signal represents a logic "1" or "0".
The lighting fixture according to claim 1 or 2. The baud rate of the second communication protocol is an integral multiple of 4 times or more the baud rate of DALI,
The encoding method of the second communication protocol is a logic "0" when the signal level of the signal is HIGH immediately after being LOW, and a logic "1" when the signal level of the signal is HIGH immediately after being HIGH. is an encoding method that represents
The lighting fixture according to claim 3. The two or more communication protocols are Manchester encoding communication protocols with different baud rates,
The lighting fixture according to any one of claims 1 to 4. The lighting fixture according to any one of claims 1 to 5,
and the lighting control device.
lighting control system.

Images