JP2016031850A - Lighting fixture, lamp, and lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture, a lamp, and a lighting device capable of performing current control so as to compensate for decrease in the amount of light of an LED element incident to temperature rise.SOLUTION: A lighting fixture 100 includes an LED lamp 27, a lighting device 1, a dimmer 29, and a dimming signal interface (I/F) circuit 4. The lighting device 1 includes a step-up chopper circuit 2, a back converter circuit 3, and a controller 40. The lighting fixture 100 includes communication means for communicating a wireless signal Tx between the LED lamp 27 and the lighting device 1. The communication means is constituted of a transmission unit 62 and a reception unit 46 for wireless communication. The transmission unit 62 is incorporated in the LED lamp 27 and outputs the wireless signal Tx including the temperature information detected by a temperature detection element 60. The controller 40 sets a larger target current value for higher temperature of an LED element 28, based on the temperature information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lighting fixture, a lamp, and a lighting device.

  Conventionally, as disclosed in, for example, Japanese Patent Laid-Open No. 2001-43728, a technique for suppressing a change in light amount according to the temperature of an LED element is known. The LED element has a characteristic that its temperature changes according to the use situation, and the amount of light also changes according to the temperature change. Specifically, the amount of light decreases when the temperature of the LED element increases. For example, when the lighting time elapses immediately after the LED element is turned on, the temperature of the LED element rises and the amount of light decreases. In the technology disclosed in the above publication, a thermistor or thermocouple is attached in the vicinity of the LED element light emission to detect the temperature rise of the LED element, and the temperature of the LED element is made constant by controlling the Peltier element arranged in the vicinity of the LED element. I am doing so.

JP 2001-43728 A

  In the conventional light quantity change suppression technology, it is necessary to mount temperature detection means such as a thermocouple and cooling means such as a Peltier element on the LED module. In the case of additionally mounting Peltier elements or the like, the number of necessary Peltier elements may increase as the number of LED elements increases. The inventor of the present application has found a novel control technique for suppressing a change in the amount of light by another method that does not rely on such external cooling by the cooling means.

  In addition, when the type of the LED element is different, the content of the optimal control to be performed by the lighting device for lighting the LED element may be different. Specifically, for example, in a plurality of types of LED elements having different heat resistance, even if the element temperature is the same, the temperature is within an allowable range for a certain LED element, and the other LED element is an abnormal temperature that causes a failure. There is a case.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a lighting fixture, a lamp, and a lighting device that can compensate for a decrease in the amount of light of an LED element accompanying a temperature rise.

  Another object of the present invention is to provide a luminaire, a lamp, and a lighting device that can adjust the contents of control according to a plurality of types of LED elements.

  A lighting fixture according to a first invention includes a lamp, a lighting device that lights the lamp, and a communication unit that communicates a signal between the lamp and the lighting device, and the lamp includes an LED element, A temperature detection means for detecting the temperature of the LED element, and the signal includes temperature information of the LED element detected by the temperature detection means, and the lighting device is a converter circuit connected to the LED element. And a control means for controlling the converter circuit so that a value of a direct current supplied to the LED element coincides with a target current value, and based on the temperature information included in the signal received via the communication means. Setting means for setting the target current value to be larger as the temperature of the LED element is higher.

  A lamp according to a second aspect of the present invention includes an LED element, a temperature detection unit that detects the temperature of the LED element, and a wireless transmission unit that outputs a wireless signal including temperature information detected by the temperature detection unit.

  A lighting device according to a third aspect of the invention controls a converter circuit for generating a direct current to be supplied to an LED element and the converter circuit so that a value of the direct current to be supplied to the LED element matches a target current value. Control means, wireless receiving means for receiving a wireless signal, temperature information of the LED element is obtained from the wireless signal received via the wireless receiving means, and the target current value increases as the temperature of the LED element increases. And setting means for setting a large value.

  According to a fourth aspect of the present invention, there is provided a lighting apparatus comprising: a lamp provided with an LED element; a lighting device that lights the lamp; an identification unit that identifies the LED element; and protection for each predetermined identification information of the LED element. Storage means for storing temperature; and protection control means for performing protection control on the lighting device based on a result of comparing the protection temperature associated with the identification information with temperature information of the LED element; Is provided.

  A lamp according to a fifth aspect of the present invention includes an LED element, identification means for identifying the LED element, and wireless transmission means for outputting a radio signal including identification information obtained by the identification means.

  A lighting device according to a sixth aspect of the invention controls a converter circuit for generating a direct current supplied to the LED element and the converter circuit so that a value of the direct current supplied to the LED element matches a target current value. Control means, a wireless reception means for receiving a wireless signal, and acquiring identification information of the LED element from the wireless signal acquired via the wireless reception means, and setting the protection temperature associated with the identification information. Protection control means for performing protection control on the converter circuit based on the result of comparison with the temperature information of the LED element.

  According to the first to third inventions, since the lighting device can acquire the temperature information of the LED element, the target current value can be adjusted based on the temperature information. Since the LED element has a tendency that the amount of light decreases as the temperature increases, the decrease in the amount of light can be compensated for by setting the target current value.

  According to the fourth to sixth inventions, since the identification information of the LED element is acquired and the control content can be changed for each identification information, the content of the control performed by the lighting device is adjusted according to the type of the LED element. be able to.

It is a figure which shows the lighting fixture, lamp, and lighting device concerning embodiment of this invention. It is a flowchart which shows the control content performed in the lighting fixture concerning embodiment of this invention. It is a flowchart which shows the control content performed in the lighting fixture concerning embodiment of this invention. It is a figure for demonstrating the lighting fixture operation | movement concerning embodiment of this invention. It is a figure for demonstrating the lighting fixture operation | movement concerning embodiment of this invention.

Configuration of an apparatus according to an embodiment.
FIG. 1 is a circuit diagram showing a lighting device 1, an LED lamp 27, and a lighting fixture 100 according to an embodiment of the present invention. The lighting fixture 100 includes an LED lamp 27, a lighting device 1, a dimmer 29, and a dimming signal interface (I / F) circuit 4. The lighting device 1 includes a step-up chopper circuit 2, a buck converter circuit 3, and a control device 40. The luminaire 100 includes communication means for communicating a radio signal Tx between the LED lamp 27 and the lighting device 1. In the present embodiment, the communication means includes a transmitter 62 and a receiver 46 for wireless communication, as will be described later. In addition, since the communication technique for performing radio | wireless communication in the transmission part 62 and the receiving part 46 is already well-known and is not a novel matter, the detailed description is abbreviate | omitted.

  The LED lamp 27 includes a plurality of LED elements 28, a temperature detection element 60, a temperature detection circuit 61, a transmission unit 62, and an identification information unit 63. The LED lamp 27 can take various shapes such as a bulb shape, a straight tube shape, and a ceiling light shape. Further, the LED lamp 27 may be removable from the lighting device 1, or the LED lamp 27 may not be removable from the lighting device 1. The temperature detection element 60 according to the present embodiment is specifically a thermistor, and an output signal from the temperature detection element 60 is input to the temperature detection circuit 61. The temperature detection circuit 61 generates a signal having a value proportional to the temperature of the LED element 28 from the output signal of the temperature detection element 60, and transmits this signal to the transmission unit 62. The transmitter 62 is built in the LED lamp 27 and outputs a radio signal Tx. The radio signal Tx includes temperature information detected by the temperature detection element 60.

  The luminaire 100 also includes “identification means” for identifying the LED elements 28. In the present embodiment, the “identification unit” is realized by the transmission unit 62 reading the identification information of the identification information unit 63 and including the identification information in the radio signal Tx. The identification information unit 63 is composed of, for example, a non-volatile memory, and stores information such as the manufacturer of the LED lamp 27 and rated output specifications in advance.

  As described above, the radio signal Tx output from the transmission unit 62 includes the temperature information of the LED element 28 detected by the temperature detection element 60 and the identification information of the LED element 28 read from the identification information unit 63. It is out. The radio signal Tx is received by the receiving unit 46 built in the control device 40.

  In FIG. 1, for convenience of explanation, the temperature detection circuit 61 and the identification information unit 63 are illustrated as separate blocks as an example, but this does not limit the present invention. The temperature detection circuit 61 and the identification information unit 63 may be integrally configured using a known microcomputer, or the identification information unit 63 may be realized by storing the identification information in the memory of the microcomputer.

  In the present embodiment, the number of LED elements 28 connected in series is five, and the number of temperature detecting elements is one. However, the present invention is not limited to this, and a plurality of LED elements 28 may be connected in parallel, or a plurality of LED elements 28 may be connected in series and parallel. Further, the number of LED elements 28 of the LED lamp 27 is not limited to five, and an arbitrary number of LED elements 28 may be mounted on the LED lamp 27.

  The step-up chopper circuit 2 of the lighting device 1 is a step-up converter circuit that performs power factor improvement, and includes a rectifier circuit 8, a capacitor 9, a voltage dividing circuit in which resistors 31 and 32 are connected in series, an inductor (coil) 10, A switching element Q1, a diode 14, a capacitor 17, and a voltage dividing circuit in which resistors 15 and 16 are connected in series are provided. The rectifier circuit 8 is connected to the AC power source 7. The capacitor 9 is connected in parallel to the output terminal of the rectifier circuit 8. A voltage dividing circuit in which resistors 31 and 32 are connected in series is connected in parallel to the capacitor 9. One end of the inductor (coil) 10 is connected to the high potential side of the rectifier circuit 8. The switching element Q1 includes a first terminal (a drain in the present embodiment), a second terminal (a source in the present embodiment), and a control terminal for switching between the first and second terminals (a gate in the present embodiment). And having a first terminal connected to the other end of the inductor 10. The diode 14 has an anode connected to a connection point between the first terminal of the switching element Q1 and the other end of the inductor 10. The capacitor 17 is composed of an electrolytic capacitor having a positive electrode connected to the cathode of the diode 14 and a negative electrode connected to the low potential side of the rectifier circuit 8. A voltage dividing circuit in which resistors 15 and 16 are connected in series is connected in parallel to the capacitor 17. The voltage across the capacitor 17 is divided by the resistors 15 and 16 and input to the control device 40.

  The buck converter circuit 3 includes a voltage dividing circuit in which a switching element Q2, a diode 21, an inductor (choke coil) 22, a capacitor 23, a detection resistor 24, and resistors 51 and 52 are connected in series. A series circuit composed of the switching element Q2 and the diode 21 is connected in parallel with the capacitor 17 of the step-up chopper circuit 2. The switching element Q2 is a MOSFET in the present embodiment, and controls for switching between the first terminal (drain in the present embodiment), the second terminal (source in the present embodiment), and the first and second terminals. A terminal (in this embodiment, a gate) is provided. The first terminal of the switching element Q <b> 2 is connected to one end (positive electrode) of the capacitor 17, and the second terminal is connected to the cathode of the diode 21. The inductor 22, the capacitor 23, and the detection resistor 24 are connected in this order to form a series circuit, and this series circuit is connected in parallel to the diode 21. The voltage dividing circuit in which the resistors 51 and 52 are connected in series is connected in parallel to the capacitor 23. The anode ends of the plurality of LED elements 28 connected in series and the positive terminal of the capacitor 23 are connected. The cathode ends of the plurality of LED elements 28 connected in series and the negative terminal of the capacitor 23 are connected. As a result, a current is supplied from the buck converter circuit 3 to the LED element 28, and the LED element 28 emits light.

  The detection resistor 24 is provided in the buck converter circuit 3, and a voltage is generated in the detection resistor 24 in accordance with a current flowing through the LED lamp 27 (hereinafter also simply referred to as “LED current”). By inputting the detection voltage of the detection resistor 24 to the control device 40, the magnitude of the LED current can be detected. The control device 40 turns on and off the switching element Q2 of the buck converter circuit 3 based on the detection voltage by the detection resistor 24 so that the LED current becomes a constant current.

  Since various microcomputers provided as the control device 40 for digital power supply are already known, these known microcomputers can be appropriately used for the control device 40. As an example in the present embodiment, the control device 40 shown in FIG. 1 includes control circuits 41 and 42, a storage unit 43, an A / D conversion circuit 44, a processing device 45, and a reception unit 46 connected to each other via an internal bus. It has. The control circuits 41 and 42 each output a PWM signal according to a control signal from the processing device 45. Switching elements Q1 and Q2 are switched by this PWM signal. The storage unit 43 including a non-volatile memory stores an arithmetic program to be executed by the processing device 45 and various data used for the arithmetic operation so as to be writable / readable. The processing device 45 calculates an on-time or the like in the switching control of the switching elements Q1 and Q2. The control device 40 responds to the voltage divided by the resistors 15 and 16, the voltage divided by the resistors 31 and 32, the voltage divided by the resistors 51 and 52, and the LED current detected by the detection resistor 24. Each voltage is input. These voltage values are converted into digital values by the A / D conversion circuit 44, and arithmetic processing is performed by the processing device 45 using the digital values. A dimming signal from the dimmer 29 is input to the control device 40 via the dimming signal I / F circuit 4. The control device 40 performs constant current feedback control so that the LED current matches the target current determined based on the dimming signal. In the constant current feedback control, the ON width of the switching element Q2 is adjusted based on the LED current detected by the detection resistor 24.

  In the present embodiment, the storage unit 43 stores a “target current table” and a “protection temperature table”. The “target current table” is used in the routine of FIG. 2 to be described later, and the relationship between the LED temperature and the target current value is determined in advance for each identification information of the LED element 28. That is, the target current table stores different temperature current characteristics for each piece of identification information. In general, since the light amount tends to decrease as the LED temperature increases, the target current value is set to be large so that the light amount does not decrease as the LED temperature increases so as to correct this.

  4 and 5 are diagrams for explaining the operation of the lighting fixture 100 according to the embodiment of the present invention. FIG. 4 is a graph schematically showing the relationship between the LED temperature and the amount of light for each of three different types of LED elements. Here, three different types of LED elements X1, X2, and X3 are assumed. The LED element X1 has the greatest decrease in the amount of light with respect to the temperature increase, the LED element X3 has the smallest decrease in the amount of light with respect to the increase in temperature, and the LED element X2 has an intermediate characteristic between the LED element X1 and the LED element X3. The LED element X1 in which the amount of light significantly decreases at high temperatures and the LED element X3 in which the amount of light does not change much even at the same high temperature have different target current adjustment values for realizing the same amount of light. This is because if the degree of decrease in the amount of light with respect to the temperature change is small, the range for changing the target current value may be small.

  FIG. 5 is a graph schematically showing the contents of the target current table according to the embodiment. For each of the three types of LED elements X1, X2, and X3, the characteristics of the LED temperature and the target current value are set to different slopes. When the LED element X1 is at a high temperature, the amount of light is greatly reduced. Therefore, the characteristic of the LED element X1 in the target current table is determined so that the target current value increases with a steep inclination with respect to the temperature change by setting a large increase range of the target current value according to the rise of the LED temperature. On the other hand, the LED element X3 is less reduced in light amount than the LED element X1 even at a high temperature. Therefore, the characteristic of the LED element X3 in the target current table is set so that the increase amount of the target current value corresponding to the increase in LED temperature is smaller than that of the LED element X1, and is gentler than the characteristic of the LED element X1 with respect to the temperature change. The target current value is determined to increase with the slope. The characteristic of the LED element X2 in the target current table is determined to be an intermediate slope between the LED elements X1 and X3.

  In the present embodiment, as a preferred embodiment, the adjustment amount of the target current value is changed according to the identification information by reading an appropriate adjustment amount predetermined for each identification information of the LED element 28 from the target current table. . That is, the processing device 45 executes a process of determining which characteristic of FIG. 5 is to be used depending on whether the identification information indicates any of the LED elements X1 to X3. Accordingly, it is possible to select an appropriate temperature / current characteristic from the target current table in accordance with different temperature characteristics of the plurality of types of LED elements 28.

  In FIG. 5, the target current value is illustrated so as to show a continuous change according to the temperature. However, this is a schematic diagram and does not limit the present invention, and the target current value depends on the temperature. It does not have to change continuously. In accordance with the increasing tendency of FIG. 5, a target current table may be created in which a fixed target current value is assigned to each of a plurality of predetermined temperature regions. Accordingly, the target current value may be increased or decreased discontinuously each time the temperature region to which the current LED temperature belongs changes.

  On the other hand, the “protection temperature table” is a table in which a predetermined protection temperature is set for each piece of identification information. In the protection temperature table, the protection temperature of the LED element 28, that is, the upper limit value of the temperature is set in correspondence with the identification information of the LED element 28. Specifically, different protection temperatures Ts1, Ts2, and Ts3 are set for each of the LED elements X1 to X3. This protection temperature table is used in the routine of FIG.

  In the embodiment, information is stored in the storage unit 43 in the form of a table as described as “target current table” and “protection temperature table”. However, the table is an example, and similar information may be stored in the storage unit 43 in a form other than the table, for example, in the form of an arithmetic expression that can be calculated by the processing device 45. That is, “information that defines the relationship between the LED temperature of different types of LED elements and the target current value” and “information that defines the relationship between the different types of LED elements and the protection temperature” may be stored in the storage unit 43. .

Control of target current value according to the embodiment.
FIG. 2 is a flowchart showing the control contents executed in the lighting apparatus 100 according to the embodiment of the present invention. Among the control contents shown in FIG. 2, steps S <b> 1 and S <b> 2 are operations on the LED lamp 27 side, and steps S <b> 3 to S <b> 5 are stored in advance in the storage unit 43 as a program. Is executed.

  First, in the LED lamp 27, the temperature detection element 60 detects the temperature of the LED element 28 in the LED lamp 27 (step S1).

  Next, in the LED lamp 27, the output signal of the temperature detection element 60 is converted into temperature information by the temperature detection circuit 61, and the transmission unit 62 reads the identification information of the LED element 28 from the identification information unit 63, and the LED temperature information. And the transmission part 62 transmits the radio signal Tx containing LED identification information (step S2).

  Next, the processing device 45 executes processing for determining whether or not output change is necessary (step S3). Specifically, first, the control device 40 receives the radio signal Tx at the receiving unit 46. LED temperature information and LED identification information are acquired from the received radio signal Tx, the type of the LED element 28 is determined, and the LED temperature is compared with a predetermined reference temperature. The reference temperature is preferably set for each type of LED element 28. When the difference between the LED temperature and the reference temperature is larger than a predetermined value, it can be determined that the change in the amount of light accompanying the temperature change of the LED element 28 is unacceptably large. Therefore, when the difference between the LED temperature and the reference temperature is larger than a predetermined value, it is determined that the output needs to be changed. On the other hand, if the difference between the LED temperature and the reference temperature is equal to or less than a predetermined value, it is determined that no output change is necessary, and the process returns to step S1.

  If it is determined in step S3 that output change is necessary, the process proceeds to step S4. In step S4, the above-described “target current table” in the storage unit 43 is referred to, and the processing device 45 reads a target current value corresponding to the LED temperature from the target current table. As described above, the control device 40 performs constant current feedback control for adjusting the ON width of the switching element Q2 so that the LED current matches the target current. The new target current value read from the target current table in step S4 is used for constant current feedback control. Specifically, first, in step S4, the content of the control signal given to the control circuit 42 by the processing device 45 is changed. Subsequently, the control signal after the change is given to the control circuit 42 in step S5. When the control signal from the processing device 45 changes, the control circuit 42 adjusts the PWM signal applied to the control terminal (gate) of the switching element Q2 accordingly. Note that the change of the target current value in step S4 is performed separately from the determination of the target current value by the dimming signal of the dimmer 29.

  As a modification, the control signal to the control circuit 41 that drives the switching element Q1 of the boost chopper circuit 2 may be changed. Further, both control signals for the control circuit 41 and the control circuit 42 may be changed.

  As described above, in the present embodiment, the control device 40 sets the target current value to be larger as the temperature of the LED element 28 is higher based on the temperature information. Thus, since the lighting device 1 can acquire the temperature information of the LED element 28, the target current value can be adjusted based on this temperature information. Since the LED element 28 has a tendency that the amount of light decreases as the temperature increases, the decrease in the amount of light can be compensated for by setting the target current value. Furthermore, in the present embodiment, the control device 40 changes the adjustment amount of the target current value according to the temperature of the LED element 28 for each identification information included in the radio signal Tx by referring to the target current table. . Thereby, an appropriate target current value can be set for a plurality of types of LED elements 28 having different temperature characteristics. In the present embodiment, as a more preferable control, the target current value is changed so as to cancel out the change in the light amount when the LED temperature changes. Thereby, even when the LED temperature changes, the amount of light can be kept constant.

  In the above-described embodiment, as a preferable mode, the relationship between the temperature of the LED element 28 and the target current value is defined for each piece of identification information of the LED element 28 in the target current table, but the present invention is not limited to this. . It is not necessary to consider the identification information of the LED element 28. In this case, a table defining the relationship between the temperature of the LED element 28 and the target current value is created, and this table is shared for different types of LED elements 28. May be used for For example, the average of the temperature characteristics of the LED elements X1 to X3 in FIG. 5 may be obtained, and the averaged temperature characteristics may be commonly used for different types of LED elements 28.

Temperature protection control according to the embodiment.
In the present embodiment, control device 40 performs protection control on buck converter circuit 3 based on the result of comparing a predetermined protection temperature with temperature information. As described above, the storage unit 43 stores a “protection temperature table”. The control device 40 refers to the protection temperature table to change the protection temperature value to an optimum value according to the identification information of the LED element 28.

  FIG. 3 is a flowchart showing the control contents executed in the lighting apparatus 100 according to the embodiment of the present invention. Among the control contents shown in FIG. 3, steps S11 and S12 are operations on the LED lamp 27 side, and steps S13 and S14 are stored in advance in the storage unit 43 as a program, and the processing device 45 is operating during the operation of the lighting device 1. Is executed.

  First, the temperature of the LED element 28 is detected by the temperature detection element 60 similarly to step S1 of FIG. 2 (step S11). Next, as in step S2 of FIG. 2, the transmission unit 62 transmits a radio signal including the temperature information of the LED element 28 and the identification information of the LED element 28 (step S12).

  Next, the processing device 45 executes processing for determining whether or not an LED temperature abnormality has occurred (step S13). Specifically, first, the control device 40 receives the radio signal Tx by the receiving unit 46. Further, the processing device 45 acquires the LED temperature information and the LED identification information included in the wireless signal Tx, and reads the protection temperature by referring to the protection temperature table based on these information. Further, the processing device 45 executes processing for determining whether or not the temperature of the LED element 28 obtained from the LED temperature information is equal to or higher than the read protection temperature.

  When it determines with LED temperature abnormality having arisen by step S13, the processing apparatus 45 performs protection control (step S14). Specifically, this protection control is control in which the processing device 45 causes the control circuit 42 to generate a switching operation stop signal for stopping the switching element Q2 of the buck converter circuit 3. The control circuit 42 outputs this switching operation stop signal to the control terminal of the switching element Q2, whereby the operation of the buck converter circuit 3 is stopped.

  As described above, according to the present embodiment, since the lighting device 1 can acquire the identification information of the LED element 28, the control of the lighting device 1 according to the type of the LED element 28 is performed. The contents can be adjusted. That is, when a plurality of types of LED elements having different heat resistance are used for the LED element 28, the temperature is within an allowable range when an LED element having a certain temperature characteristic is applied to the LED element 28 even at the same element temperature. When an LED element having other temperature characteristics is applied to the LED element 28, it may be an abnormal temperature that causes a failure. In this regard, according to the above embodiment, by using the protection temperature table in which different protection temperatures Ts1, Ts2, and Ts3 are set for each of the LED elements X1 to X3, an appropriate protection temperature depending on the type of the LED element 28. Can be set.

  As a variation of the circuit operation stop, it may be configured to stop the on / off of the switching element Q1 of the boost chopper circuit 2, or may be configured to stop both the switching elements Q1 and Q2.

  In addition, in this Embodiment, although the lighting fixture 100 which performs both the control content shown in FIG. 2 and FIG. 3 was provided, this invention is not limited to this. The lighting apparatus 100 may perform only the control of the target current value shown in FIG. 2 alone, and in that case, the storage unit 43 may not have the protection temperature table. Moreover, the lighting fixture 100 may perform only the protection control shown in FIG. 3 alone, and in that case, the storage unit 43 may not have the target current table. In the present embodiment, the target temperature table and the protection temperature table are stored in the storage unit 43. However, the present invention is not limited to this, and information on these tables is stored in any of the entire lighting device 100. Just hold it. For example, if the LED lamp 27 has a sufficient built-in memory, the target temperature table and the protection temperature table may be stored in the built-in memory. In this case, the target current value and the protection temperature are included in the radio signal Tx. You may not. Further, if the internal microcomputer of the LED lamp 27 can perform the arithmetic processing of the routine of FIG. 3, the routine of FIG. In that case, a protection signal to be subjected to protection control may be included in the radio signal Tx, and the lighting device 1 may perform protection control when the protection signal is received.

  In addition, since the structure of the base that attaches the LED lamp to the lighting device is limited in the lamp-exchangeable LED lighting apparatus, it is difficult to attach a wiring for the temperature detection circuit to such an LED lamp. In this respect, according to the lighting fixture 100 according to the present embodiment, since the LED temperature information and the like are transmitted and received by wireless communication, there is an advantage that the structure of the base is not affected.

  In comparison with Patent Document 1, for example, a large-sized LED lamp such as a straight tube type requires a large amount of Peltier elements for sufficient temperature control. The In this respect, according to the lighting fixture 100 according to the present embodiment, there is an advantage that an additional part such as a Peltier element is unnecessary.

1 lighting device, 2 step-up chopper circuit, 3 buck converter circuit, 4 dimming signal interface (I / F) circuit, 7 AC power supply, 8 rectifier circuit, 9, 17, 23 capacitor, 10, 22 inductor, 14, 21 diode 15, 16, 31, 32, 51, 52 Resistance, 24 Detection resistance, 27 LED lamp, 28 LED element, 29 Dimmer, 40 Control device, 41, 42 Control circuit, 43 Storage unit, 44 A / D conversion Circuit, 45 processing device, 46 reception unit, 60 temperature detection element, 61 temperature detection circuit, 62 transmission unit, 63 identification information unit, 100 lighting fixture, Q1, Q2 switching element

Claims (10)

With lamps,
A lighting device for lighting the lamp;
A communication means for communicating a signal between the lamp and the lighting device;
With
The lamp includes an LED element, and temperature detection means for detecting the temperature of the LED element,
The signal includes temperature information of the LED element detected by the temperature detecting means,
The lighting device is
A converter circuit connected to the LED element;
Control means for controlling the converter circuit so that a value of a direct current supplied to the LED element matches a target current value;
Setting means for setting the target current value to be larger as the temperature of the LED element is higher based on the temperature information included in the signal received via the communication means;
A lighting fixture comprising: An identification means for identifying the LED element;
The signal includes identification information used for identification of the LED element obtained by the identification means,
The lighting apparatus according to claim 1, wherein the setting unit changes an adjustment amount of the target current value according to the identification information included in the signal received via the communication unit.   The lighting fixture according to claim 1, further comprising protection control means for performing protection control on the converter circuit based on a result of comparing a predetermined protection temperature with the temperature information. Identification means for obtaining identification information for identifying the LED element;
Storage means storing a predetermined protection temperature for each identification information;
With
The lighting apparatus according to claim 3, wherein the protection control unit changes the protection temperature according to the identification information. The signal is a radio signal;
The communication means includes
Wireless transmission means provided in the lamp, for outputting the wireless signal including the temperature information detected by the temperature detection means;
A wireless receiving means provided in the lighting device for receiving the wireless signal and transmitting it to the setting means;
The lighting fixture of any one of Claims 1-4 containing. An LED element;
Temperature detecting means for detecting the temperature of the LED element;
Wireless transmission means for outputting a wireless signal including temperature information detected by the temperature detection means;
A lamp equipped with. A converter circuit for generating a direct current supplied to the LED element;
Control means for controlling the converter circuit so that a value of a direct current supplied to the LED element matches a target current value;
Wireless receiving means for receiving wireless signals;
Setting means for obtaining temperature information of the LED element from the wireless signal received via the wireless receiving means, and setting the target current value larger as the temperature of the LED element is higher;
A lighting device comprising: A lamp equipped with an LED element;
A lighting device for lighting the lamp;
Identification means for identifying the LED element;
Storage means for storing a protection temperature for each identification information of the LED elements determined in advance;
Protection control means for performing protection control on the lighting device based on a result of comparing the protection temperature associated with the identification information with temperature information of the LED element;
A lighting fixture comprising: An LED element;
Identification means for identifying the LED element;
Wireless transmission means for outputting a wireless signal including identification information obtained by the identification means;
A lamp equipped with. A converter circuit for generating a direct current supplied to the LED element;
Control means for controlling the converter circuit so that a value of a direct current supplied to the LED element matches a target current value;
Wireless receiving means for receiving wireless signals;
Based on a result obtained by acquiring identification information of the LED element from the wireless signal acquired through the wireless reception means, and comparing a protection temperature associated with the identification information with temperature information of the LED element. Protection control means for performing protection control on the circuit;
A lighting device comprising:

Images