JP2015185376A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device that can suppress execution of erroneous control.SOLUTION: A lighting device has an illumination part, a reception part, a response part, and a controller. The illumination part illuminates any place. The reception part receives a control signal as a bipolar signal which instructs to control the illumination part and is transmitted from an upper device. The response part returns a response to the upper device by varying the waveform of the control signal in an idle period out of a signal period and an idle period of the control signal received by the reception part. The controller controls the illumination part on the basis of a half-wave rectified signal which is one of a half-wave rectified signal obtained by performing half-wave rectification at the positive polarity on the control signal whose waveform is varied by the response part, and a half-wave rectified signal obtained by performing half-wave rectification at the negative polarity on the control signal and in which the idle period of the control signal and the timing of an L level section are coincident with each other with respect to the control signal whose waveform is varied by the response part.

Description

  Embodiments described herein relate generally to a lighting device.

  2. Description of the Related Art In recent years, lighting systems that make it possible to individually control a plurality of lighting devices are known. Such a lighting system includes a host device that transmits a signal that instructs control such as turning off, lighting, and changing illuminance to each lighting device as a control signal, and an LED (Light Emitting Diode) according to a control signal received from the host device. A lighting device including a power supply device to be controlled. When the lighting device completes the control of the LED based on the instruction (control content) indicated by the control signal, by short-circuiting the two signal lines through which the control signal flows, a short-circuit current is passed through the signal line, Alternatively, the voltage between the two signal lines is reduced. In this case, the host device can detect a short circuit current or a voltage drop. The host device detects a response from the lighting device by detecting a short circuit current or a voltage drop. In this way, the lighting device returns a response to the host device.

  However, since a change occurs in the waveform of the control signal when returning a response, the lighting apparatus may detect erroneous control content from the control signal in which the change in the waveform occurs. When the wrong control content is detected, the lighting device erroneously controls the LED based on the wrong control content.

"Lighting fixture individual control system T / Flecs (T-Flex) | Lighting control / aviation obstacle light | Products | Toshiba Lighting & Technology Corporation", [online], [Search March 7, 2014], Internet <http: //www.tlt.co.jp/tlt/products/system/t_flecs.htm>

  An object of the present invention is to provide an illuminating device that can suppress erroneous control.

  The illumination device according to the embodiment includes an illumination unit, a reception unit, a response unit, and a control unit. The illumination unit illuminates an arbitrary place. The receiving unit receives a control signal which is a bipolar signal instructing control of the illumination unit transmitted from the host device. The response unit returns a response to the host device by changing the waveform of the control signal in the pause period among the signal period and the pause period in the control signal received by the receiver. The control unit is a control signal out of a half-wave rectified signal that is half-wave rectified with a positive polarity and a half-wave rectified signal that is half-wave rectified with a negative polarity with respect to the control signal whose waveform is changed by the response unit. The illumination unit is controlled based on the half-wave rectified signal having the same timing in the pause period and the L level section.

  According to the illuminating device of the embodiment, an effect that it is possible to suppress erroneous control can be expected.

Drawing 1 is a figure showing the example of composition of the lighting system concerning an embodiment. FIG. 2 is a diagram illustrating an example of a control signal of a predetermined control method. FIG. 3 is a diagram illustrating a configuration example of the power control unit 10 according to the embodiment. FIG. 4 is a diagram illustrating a configuration example of the interface circuit 12 according to the embodiment. FIG. 5A is a diagram illustrating an example of an input control signal. FIG. 5B is a diagram illustrating an example of a half-wave rectified signal to be output. FIG. 5C is a diagram illustrating an example of a half-wave rectified signal to be output. FIG. 6A is a diagram illustrating an example of an input control signal. FIG. 6B is a diagram illustrating an example of a control signal whose waveform has changed. FIG. 7A is a diagram illustrating an example of a half-wave rectified signal obtained by half-wave rectifying a control signal having a changed waveform. FIG. 7B is a diagram illustrating an example of a half-wave rectified signal obtained by half-wave rectifying a control signal whose waveform has changed. FIG. 8 is a diagram illustrating a functional configuration of the microcomputer according to the embodiment. FIG. 9 is a flowchart illustrating a procedure of processing executed by the microcomputer according to the embodiment.

  Hereinafter, the illumination system 1 and the illumination device 5 according to the embodiment will be described with reference to the drawings. In the embodiment, the same parts are denoted by the same reference numerals, and redundant description is omitted.

(Embodiment)
First, the illumination system according to the embodiment will be described with reference to FIGS.

[Configuration of lighting system]
Drawing 1 is a figure showing the example of composition of the lighting system concerning an embodiment. A lighting system 1 shown in FIG. 1 is a system that realizes control and monitoring of a lighting device installed in a home or office. For example, the lighting system 1 may acquire information on an environment in which the lighting device is installed using a sensor or the like, and may control the lighting device based on the acquired information.

  In the illumination system 1 shown in FIG. 1, a host device 2 and a plurality of communication units 3 and 4 are connected. Moreover, the communication part 3 is connected with the some illuminating devices 5-7. The communication unit 4 is connected to the lighting device 8. The lighting device 5 includes an LED 9 and a power supply control unit 10. The LED 9 illuminates an arbitrary place. The LED 9 is an example of an illumination unit. The power control unit 10 controls the LED 9. Moreover, the following description is abbreviate | omitted as the illuminating devices 6-8 exhibit the same function as the illuminating device 5. FIG. Moreover, the number of the communication parts 3 and 4 and the illuminating devices 5 to 8 included in the illumination system 1 illustrated in FIG. 1 is merely an example, and can be appropriately changed according to the configuration of the illumination system 1.

  The host device 2 outputs a control signal that instructs the communication unit 3 and the communication unit 4 to control the lighting fixture. For example, the host device 2 outputs a control signal instructing arbitrary control to the communication unit 3 such as turning on / off the LED 9 of the lighting device 5, changing the illuminance, changing the light color, and the like. The host device 2 can use any type of control method to control the lighting fixture. For example, the host device 2 outputs a control signal corresponding to a predetermined control method in order to control the lighting fixture. Hereinafter, a case where the host device 2 outputs a control signal corresponding to the predetermined control method (control signal of the predetermined control method) will be described as an example.

  Here, a control signal of a predetermined control method output from the host device 2 will be described. FIG. 2 is a diagram illustrating an example of a control signal of a predetermined control method. As shown in FIG. 2, the control signal of the predetermined control method is a control signal whose voltage changes in a range of both positive and negative poles. Such a control signal is also referred to as a bipolar signal because the voltage changes in a range of both positive and negative poles. That is, the host device 2 outputs a bipolar signal as shown in FIG. 2 as a control signal.

  The control signal of the predetermined control method is a control signal indicating the control content at the rising or falling position of the voltage. For example, a control signal of a predetermined control method indicates the control content in a period (section) from the rising edge to the falling edge of the voltage. As shown in FIG. 2, such a period is a period having a relatively positive polarity and is also referred to as a signal period. In addition, a period from a voltage falling to a rising edge (a period having a relatively negative polarity) does not contribute to control, and is also referred to as a pause period. Here, the period having a relatively positive polarity refers to a period having a relatively high voltage value compared to other periods. Similarly, a period having a relatively negative polarity refers to a period having a relatively low voltage value compared to other periods.

  Returning to FIG. 1, the description will be continued. The communication unit 3 is a relay device that relays communication between the host device 2 and each of the lighting devices 5 to 7. For example, when the communication unit 3 receives a control signal indicating the control content for the LED 9 from the host device 2, the communication unit 3 outputs the received control signal to the lighting device 5 having the LED 9. In addition, the communication unit 3 receives a response signal indicating a response to the completion of control of the LED 9 based on the control content indicated by the control signal or a notification signal indicating the state of the LED 9 from the lighting device 5. The response signal or notification signal thus transmitted is transmitted to the host device 2. As a result, the host device 2 can grasp that the control of the LED 9 is completed and the dimming state of the LED 9. The communication unit 4 exhibits the same function as that of the communication unit 3 and will not be described.

  The illuminating device 5 is an illuminating device installed in a home, an office, etc., for example. The illumination device 5 includes an LED 9 and a power supply control unit 10. The LED 9 is a replaceable illumination. The power control unit 10 controls the LED 9. Moreover, the illuminating device 5 becomes a unit which performs installation or replacement | exchange, when installing and updating the illumination system 1, similarly to the conventional illuminating device.

[Configuration of Power Supply Control Unit 10]
Hereinafter, a configuration example of the power supply control unit 10 will be described with reference to FIG. FIG. 3 is a diagram illustrating a configuration example of the power control unit 10 according to the embodiment. As shown in FIG. 3, the power supply control unit 10 includes a power supply circuit 11, an interface circuit 12, a microcomputer 13, and a control circuit 14. Further, the power supply circuit 11 is connected to a power supply for power supplied to the LED 9.

[Power supply circuit 11]
The power supply circuit 11 is a circuit that changes the power supplied to the LED 9 in accordance with control by the control circuit 14. For example, the power supply circuit 11 receives supply of power from a power supply. When the power supply circuit 11 receives the control signal from the control circuit 14, the power supply circuit 11 controls the amount of power supplied from the power supply to the LED 9 according to the received control signal, thereby turning on / off the LED 9. Change illuminance, change light color, etc.

[Interface circuit 12]
The interface circuit 12 includes a rectifier circuit that rectifies the control signal received from the communication unit 3, and outputs the control signal rectified using the rectifier circuit to the microcomputer 13. To explain with a specific example, the interface circuit 12 allows the microcomputer 13 to identify the control contents, and the control signal is a half-wave rectified signal that is a rectified signal that is half-wave rectified to the positive side, and the control signal is a negative electrode. A half-wave rectified signal that is a rectified signal half-wave rectified to the side is output to the microcomputer 13.

  Next, a configuration example of the interface circuit 12 will be described with reference to FIG. FIG. 4 is a diagram illustrating a configuration example of the interface circuit 12 according to the embodiment. In the example illustrated in FIG. 4, the interface circuit 12 includes a rectifying unit 15 and a response unit 30. The rectification unit 15 inputs control signals from two signal lines, outputs the control signal input from one signal line and the output on the negative side, and outputs the control signal input from the other signal line. Output together with the output on the negative electrode side. Here, for example, the input of the control signal from one signal line is input # 1, the input of the control signal from the other signal line is input # 2, and the output that combines the input # 1 and the negative output is combined. Is an output # 1, and an output obtained by combining the input # 2 and the negative output is an output # 2. That is, the rectifier 15 outputs a half-wave rectified signal that is half-wave rectified with a positive polarity and a half-wave rectified signal that is half-wave rectified with a negative polarity. Note that the control signal that the rectification unit 15 performs half-wave rectification includes a control signal whose waveform has been changed by the response unit 30 described later. The rectification unit 15 is a rectification circuit realized by, for example, a circuit including a diode and a transformer connected in a bridge shape, and is described with a diode symbol and a diamond figure surrounding the diode symbol.

  When a control signal that is a bipolar signal is input from the communication unit 3, the rectifying unit 15 outputs signals that allow the microcomputer 13 to identify the control contents as output # 1 and output # 2. For example, when a control signal as shown in FIG. 5A is input, the rectifier 15 outputs a signal as shown in FIG. 5B as output # 1, and a signal as shown in FIG. 5C as output # 2. Output.

  The response unit 30 returns a response to the higher-level device 2 by changing the waveform of the control signal in the pause period among the signal period and the pause period in the control signal. The response unit 30 includes a switch 30a, a resistor 30b, and a response control unit 30c. The switch 30a is a switch provided between two signal lines through which control signals flow. When the switch 30a is turned on under the control of the response control unit 30c, the two signal lines are brought into conduction. Further, when the switch 30a is turned off under the control of the response control unit 30c, the two signal lines are brought into a non-conductive state. The resistor 30b is a resistor for preventing an inrush current when the switch 30a is turned on from off. Here, when the microcomputer 13 completes the control of the LED 9 according to the control content indicated by the control signal, the microcomputer 13 is turned off for a predetermined time T in the pause period among the signal period and the pause period in the control signal. Thus, a response instruction that is an instruction to control the switch 30 a is transmitted to the response unit 30. When receiving such an instruction from the microcomputer 13, the response control unit 30c, in accordance with the response instruction, when the control of the LED 9 according to the control content indicated by the control signal is completed, the signal period and the pause period in the control signal. The switch 30a is controlled so that the switch 30a is turned off for a predetermined time T during the pause period. In this way, the response control unit 30c returns a response to the higher-level device 2 during the suspension period.

  For example, the response control unit 30c controls the switch 30a with respect to the input control signal as illustrated in FIG. 6A so that the switch 30a is turned off for a predetermined time T in the pause period of the signal period and the pause period. Thereby, the waveform of the control signal is as shown in FIG. 6B.

  Here, when a control signal as shown in FIG. 6B is input, the rectifier 15 outputs a signal as shown in FIG. 7A as output # 1, and a signal as shown in FIG. 7B as output # 2. Output. 7A and 7B show the H level section and L level section of the signal. When the waveform of the control signal is changed by the response unit 30, the rectifier 15 outputs a half-wave rectified signal such that the change of the waveform appears in the signal period as shown in FIG. 7B. If the LED 9 is controlled using a half-wave rectified signal in which such a change in waveform appears, there is a possibility that the control will be performed with incorrect control content.

[Microcomputer 13]
Therefore, the microcomputer 13 according to this embodiment includes a half-wave rectified signal that is half-wave rectified with a positive polarity and a half-wave rectified signal that is half-wave rectified with a negative polarity. Then, the half-wave rectified signal that can correctly derive the control content is identified, the control content is derived from the identified half-wave rectified signal, and an execution instruction for the derived control content is output to the control circuit 14. Returning to FIG. 3, the description will be continued. The microcomputer 13 is a microcontroller that exhibits a predetermined function by executing a program prepared in advance. For example, the microcomputer 13 is realized by an integrated circuit such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA). The The microcomputer 13 may be realized by, for example, a CPU (Central Processing Unit), an MPU (Micro Processing Unit), or the like.

  An example of the functional configuration of the microcomputer 13 will be described with reference to FIG. FIG. 8 is a diagram illustrating a functional configuration of the microcomputer according to the embodiment. As shown in the example of FIG. 8, the microcomputer 13 includes a receiving unit 16, a specifying unit 17, and a control unit 18.

  The receiving unit 16 receives a control signal from the interface circuit 12. For example, the receiving unit 16 receives from the interface circuit 12 a half-wave rectified signal that has been half-wave rectified with a positive polarity with respect to the control signal, and also receives a half-wave rectified signal that has been half-wave rectified with a negative polarity. Then, the receiving unit 16 determines whether or not the two received half-wave rectified signals are half-wave rectified signals that are half-wave rectified at the timing when the response is returned. The timing at which the response is returned here refers to a range corresponding to a predetermined delay time from the timing at which the microcomputer 13 transmits a response instruction to the response unit 30, for example. Here, the predetermined delay time is, for example, a time during which the waveform of the control signal is expected to change after the microcomputer 13 actually transmits a response instruction to the response unit 30. When the receiving unit 16 determines that the received two half-wave rectified signals are not half-wave rectified signals that are half-wave rectified at the timing when the response is returned, one of the two half-wave rectified signals is received. Is output to the control unit 18. Since there is no change in the waveform of the two half-wave rectified signals that have been half-wave rectified at the timing when no response is returned, the rising and rising of the half-wave rectified signal are performed regardless of which half-wave rectified signal is used. This is because the contents of control can be derived with high accuracy by detecting the downlink.

  On the other hand, when the receiving unit 16 determines that the received two half-wave rectified signals are half-wave rectified signals half-wave rectified at the timing when the response is returned, the received two half-wave rectified signals Is output to the specifying unit 17. Then, when receiving the instruction of the half-wave rectified signal to be output to the control unit 18 from the specifying unit 17, the receiving unit 16 is designated by the specifying unit 17 among the two half-wave rectified signals received from the interface circuit 12. The half-wave rectified signal is transmitted to the control unit 18.

  For the control signal whose waveform has been changed by the response unit 30, the specifying unit 17 includes a half-wave rectified signal that is half-wave rectified with a positive polarity, and a half-wave rectified signal that is half-wave rectified with a negative polarity, The half-wave rectified signal whose timing coincides with the control signal pause period and the L level section is identified. This is because the waveform change by the response unit 30 does not appear in the half-wave rectified signal whose timing in the pause period of the control signal coincides with the timing of the L level section. Here, the identifying unit 17 compares the predetermined signal format with each of the two half-wave rectified signals, so that the timing of the control signal pause period and the L-level section of the two half-wave rectified signals match. The half-wave rectified signal to be identified can be specified. Then, the specifying unit 17 outputs an instruction to the receiving unit 16 that the specified half-wave rectified signal is a half-wave rectified signal that is output to the control unit 18.

  For example, the identifying unit 17 selects the half-wave rectified signal shown in FIG. 7A and the half-wave rectified signal shown in FIG. 7B in FIG. 7A in which the timing of the pause period of the control signal shown in FIG. Specify the half-wave rectified signal shown. Then, the specifying unit 17 outputs an instruction to the receiving unit 17 that the half-wave rectified signal illustrated in FIG. 7A is a half-wave rectified signal that is output to the control unit 18. Thereby, the half-wave rectified signal shown in FIG. 7A is output from the receiving unit 17 to the control unit 18.

  When the control unit 18 receives the half-wave rectified signal, the control unit 14 derives the control content indicated by the received half-wave rectified signal according to the rules of a predetermined control method, and causes the control circuit 14 to reflect the derived control content. Instruct.

  Since the microcomputer 13 grasps the timing at which the response instruction is transmitted to the response unit 30, it is assumed that there is no waveform change with respect to the half-wave rectified signal half-wave rectified at this timing. Thus, it is conceivable to derive the control content from any half-wave rectified signal. However, there is a delay from when the microcomputer 13 actually transmits a response instruction to the response unit 30 until when the waveform of the control signal actually changes. The amount of delay varies with circuit conditions. For this reason, it is difficult to set a period in which it is assumed that there is no waveform change with respect to the half-wave rectified signal.

[Control circuit 14]
Returning to FIG. 3, the description will be continued. The control circuit 14 reflects the control content indicated by the control signal transmitted from the microcomputer 13 on the LED 9. For example, when the control circuit 14 receives the control contents such as turning on / off the LED 9, changing the illuminance, changing the light color from the microcomputer 13, the control circuit 14 controls the power supply circuit 11 to reflect the received control contents. Thus, the control content is reflected on the LED 9.

[Procedure for Processing by Lighting Device 5]
Next, the flow of processing executed by the microcomputer 13 according to the embodiment will be described with reference to FIG. FIG. 9 is a flowchart illustrating a procedure of processing executed by the microcomputer 13 according to the embodiment. As shown in FIG. 9, the receiving unit 16 receives a half-wave rectified signal that has been half-wave rectified with a positive polarity with respect to the control signal from the interface circuit 12, and also has a half-wave rectified half-wave rectified with a negative polarity It is determined whether or not a signal has been received (step S101).

  If it is determined that it has not been received (step S101; No), the receiving unit 16 performs the determination in step S101 again. On the other hand, when it determines with having received (step S101; Yes), the receiving part 16 is a half-wave rectification signal by which the received two half-wave rectification signals were half-wave rectified at the timing when the response was returned. Whether or not (step S102).

  When the receiving unit 16 determines that the received two half-wave rectified signals are not half-wave rectified signals half-wave rectified at the timing when the response is returned (step S102; No), the two half-wave rectified signals One half-wave rectified signal of the signals is output to the control unit 18 (step S103). When the control unit 18 receives the half-wave rectified signal, the control unit 18 derives the control content indicated by the received half-wave rectified signal according to the rules of the predetermined control method, and reflects the derived control content. 14 (step S104), and the process is terminated.

  On the other hand, when the receiving unit 16 determines that the received two half-wave rectified signals are half-wave rectified signals that have been half-wave rectified at the timing when the response is returned (step S102; Yes), the reception is received. Two half-wave rectified signals are output to the specifying unit 17 (step S105).

  And the specific | specification part 17 specifies the half-wave rectification signal from which the timing of a rest period and L level area of a control signal corresponds among the two half-wave rectification signals output from the receiving part 16 (step S106). . Then, the specifying unit 17 outputs an instruction to the receiving unit 16 that the specified half-wave rectified signal is a half-wave rectified signal to be output to the control unit 18 (step S107).

  Based on the instruction received from the specifying unit 17, the receiving unit 16 transmits the half-wave rectified signal designated by the specifying unit 17 among the two half-wave rectified signals received from the interface circuit 12 to the control unit 18. (Step S108). When the control unit 18 receives the half-wave rectified signal, the control unit 18 derives the control content indicated by the received half-wave rectified signal according to the rules of the predetermined control method, and reflects the derived control content. 14 (step S109), and the process is terminated.

[Effect of the embodiment]
As described above, the illumination device 5 includes the LED 9 that illuminates an arbitrary place. The lighting device 5 includes an interface circuit 12 that receives a control signal that is a bipolar signal that instructs control of the LED 9 transmitted from the host device 2. The lighting device 5 includes a response unit 30 that returns a response to the higher-level device 2 by changing the waveform of the control signal in the pause period among the signal period and the pause period in the control signal received by the interface circuit 12. The illuminating device 5 includes a half-wave rectified signal that is half-wave rectified with a positive polarity and a half-wave rectified signal that is half-wave rectified with a negative polarity, with respect to the control signal whose waveform is changed by the response unit 30. A control unit 18 is provided for controlling the LED 9 based on the half-wave rectified signal whose timing in the pause period of the control signal coincides with the timing of the L level section. As described above, the lighting device 5 has a half-wave rectified signal that is half-wave rectified with a positive polarity and a half-wave rectified half-wave rectified with a negative polarity with respect to the control signal whose waveform is changed by the response unit 30. The LED 9 is controlled based on a half-wave rectified signal in which no change in waveform appears in the signal. Therefore, according to the illuminating device 5, performing wrong control can be suppressed.

  In the embodiment, the receiving unit 16 determines whether the received two half-wave rectified signals are half-wave rectified signals half-wave rectified at the timing when the response is returned, and the two half-wave rectified signals. In the case where it is determined that the rectified signal is a half-wave rectified signal that has been half-wave rectified at the timing when the response is returned, the case where two half-wave rectified signals are output to the specifying unit 17 has been illustrated. However, when receiving the two half-wave rectified signals, the receiving unit 16 may output the two half-wave rectified signals to the specifying unit 17 without performing the above-described determination.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above-described embodiment. In addition, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

2 Host device 5 Lighting device 9 LED
DESCRIPTION OF SYMBOLS 10 Power supply control part 11 Power supply circuit 12 Interface circuit 13 Microcomputer 14 Control circuit 16 Reception part 17 Identification part 18 Control part

Claims (2)

An illumination unit that illuminates any location;
A receiving unit that receives a control signal that is a bipolar signal that instructs control of the illumination unit transmitted from a host device;
A response unit that returns a response to the host device by changing a waveform of the control signal in a pause period among a signal period and a pause period in the control signal received by the reception unit:
Of the control signal whose waveform has been changed by the response unit, a half-wave rectified signal that has been half-wave rectified with a positive polarity and a half-wave rectified signal that has been half-wave rectified with a negative polarity. A control unit that controls the illumination unit based on a half-wave rectified signal whose timing of the pause period and the L level section coincides;
An illumination device comprising: Of the control signal whose waveform has been changed by the response unit, a half-wave rectified signal that has been half-wave rectified with a positive polarity, and a half-wave rectified signal that has been half-wave rectified with a negative polarity, Further comprising a specifying unit for specifying a half-wave rectified signal whose signal period and rest period coincide with each other;
The lighting device according to claim 1, wherein the control unit controls the lighting unit based on a half-wave rectified signal specified by the specifying unit.

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