JP5032933B2 - LED lighting device - Google Patents

Description

  The present invention relates to an LED lighting device that includes an LED light source unit having a light emitting diode and has a function of controlling luminance and color tone of output light.

  The LED is small and can be driven at low power. Moreover, it is excellent in controllability, and the emission color can be freely varied by changing the currents flowing through the LEDs of a plurality of color tones. In recent years, the improvement in luminous efficiency of LEDs has been remarkable. For these reasons, LEDs are gradually being used in lighting applications.

  For example, a configuration described in Japanese Patent Application Laid-Open No. 2006-318773 (Patent Document 1) can be given as a configuration example of an LED lighting device having a function of controlling the luminance and color tone of output light. Japanese Patent Application Laid-Open No. 2004-228561 is an illumination device that extracts white light by using three types of LEDs of red, blue, and green having different luminance change characteristics, and each LED is different with ambient temperature and usage time. This realizes the function of keeping the chromaticity point constant even when the luminance changes. The embodiment described in FIG. 1 of Patent Document 1 includes a commercial AC power supply 1, a lighting device 2, and an LED unit 3. The lighting device 2 includes a power supply unit 21, a lighting control unit 22, an arithmetic processing unit 23, The timer 24 and the storage unit 25 are configured to obtain a desired control effect by an operation defined by the circuit configuration and the program configuration in the lighting device 2.

Thus, if the technique described in Patent Document 1 is used, it is expected to obtain a light source capable of obtaining high controllability and capable of lighting control desired by the user. In addition, recently, the luminous efficiency of LEDs has been rapidly improved and is comparable to the luminous efficiency of fluorescent lamps, and is expected to further improve in the future. From this high luminous efficiency and good controllability that fluorescent lamps do not have, that is, brightness and emission color can be easily controlled, and because mercury is not used like fluorescent lamps, the environmental impact is light, etc. In the near future, LEDs are expected to become widely used for general lighting applications.
JP 2006-318773 A

  As described above, the LED has many advantages as illumination applications, but the LED light source itself is very expensive at present compared to a light source that is currently widely used such as a fluorescent lamp. Furthermore, it is impossible to replace the fluorescent lamp lighting device, which is already widely used in society, with the LED lighting device as it is, and it is necessary to make a full change including the device and the power supply wiring. It will be. These are one major obstacle to the spread of LED lighting. The above prior art does not mention these problems and solutions to them.

  Accordingly, an object of the present invention is to provide an LED lighting device that can be lit using a fluorescent lamp lighting device, which is a lighting device that is generally widely used.

  While the fluorescent lamp has a feature of high luminous efficiency, it uses a discharge phenomenon, so that a device that generates a high starting voltage and stabilizes the current after lighting is required. Fluorescent lamp lighting devices having these functions are roughly classified into two types, one is a combination of a copper iron ballast and a glow starter, and the other is an electronic lighting device. In the past, the former copper-iron ballast and glow starter have been used as most fluorescent lamp lighting devices, but in recent years, electronic lighting devices have been increasing their occupancy with the spread of electronic components and cost reduction. In this way, although electronic lighting devices have been increasing in recent years, copper iron ballasts and glow starters have already been incorporated in buildings and fixtures in large quantities as lighting devices and function as infrastructure, and their low cost. It is still used in large quantities due to its nature. Therefore, if a fluorescent lamp lighting device that is already widely used in society can be used, new wiring work is not required, and replacement with LED lighting can be accelerated. The present invention pays attention to this point.

  FIG. 2 is a diagram illustrating an example of a lighting device for a fluorescent lamp that is widely used. In FIG. 2, 1 is a commercial AC power source, 2 is a copper-iron ballast, 20 is a fluorescent lamp, and 21 is a glow starter. The structure of the LED lighting device and the internal circuit are configured so that the LED lighting device can be replaced and attached to the fluorescent lamp 20 in FIG. 2, so that the fluorescent lamp fixture or lighting device widely used in the world can be used as it is. By using it, it becomes possible to make an LED illumination device including an LED light source unit having a light emitting diode.

  By the way, if the control device is incorporated in the LED light source device in order to realize the good controllability, which is the greatest advantage of the LED lighting device, this also becomes a major factor in increasing the cost. That is, there are various desired control characteristics for each user, and it is inevitable to increase the scale of the control device in order to meet the demands for various control characteristics.

  Therefore, the LED light source device is attached to the portion where the fluorescent lamp is conventionally attached, and the control circuit portion is accommodated in the socket portion where the conventional glow starter is attached. Since the part can be replaced according to the user's request, the control function built into the control unit can be minimized, so that it can meet various control characteristic requirements at low cost. Become.

  However, when trying to apply the configuration of the conventional example to this concept, at least one control signal line between the control unit and the drive unit and the arithmetic processing unit and the storage unit are operated although not shown in the figure. However, there are only two connecting lines for the glow starter, and there is a new problem that the control unit cannot be separated.

  In order to solve this new problem, the present invention proposes the following two means. The first is a control by a control unit using a two-terminal passive component, and the second is a method of superimposing a control signal on a power supply line. By using this means, it is possible to control with two connecting lines. Since the glow starter connection line can be used, it is possible to realize the idea that the LED light source device is used in common and the control portion is replaced according to the user's request.

  Also, a copper iron ballast will be inserted between the commercial AC power supply and the LED lighting device, and a surge voltage will be generated from the copper iron ballast when the current suddenly changes, such as when operation starts or stops, and the surge voltage is applied to the LED lighting device. For this reason, the surge voltage exceeds the withstand voltage of the element used in the LED lighting device, and in some extreme cases, a failure may occur. Therefore, it is preferable to provide a surge voltage absorber on the power input side of the LED light source device.

  That is, the LED lighting device according to the present invention includes a first base having first and second electrodes, a second base having third and fourth electrodes, an LED light source unit having a light emitting diode, and the first base. An LED light source device comprising: a power supply circuit unit that converts an alternating voltage supplied between the first electrode and the third electrode of the second base into a direct current voltage and supplies a current to the LED light source unit; A control device comprising fifth and sixth electrodes and current varying means connected between the fifth and sixth electrodes; and first and second electrodes in contact with the first and second electrodes of the first base, respectively. A first socket part having two contacts, a second socket part having third and fourth contacts for contacting the third and fourth electrodes of the second base, respectively, and fifth and sixth electrodes of the control device; Third socket with fifth and sixth contacts in contact with each other Between the second contact of the first socket part and the fifth contact of the third socket part and between the fourth contact of the second socket part and the sixth contact of the third socket part, respectively. And a lighting device having a means for connecting to the power source, wherein the power source circuit unit of the LED light source device changes a current flowing through the LED light source unit in accordance with an output of a current varying unit of the control device. It is.

  Here, the said 1st-4th electrode of the said LED light source device shall have the same dimension shape as a cap pin of a straight tube | pipe type fluorescent lamp. The LED light source device may include a third base having first to fourth electrodes instead of the first base having the first and second electrodes and the second base having the third and fourth electrodes. Can do. In this case, the first to fourth electrodes of the LED light source device may have the same size and shape as the base pin of the annular fluorescent lamp. Further, the fifth and sixth electrodes of the control device may have the same size and shape as a terminal pin or screw-type base of a glow starter.

  The LED light source device may include a plurality of the LED light source units, and the power source circuit unit may individually change the currents that flow through the plurality of LED light source units according to the output of the current varying unit. . The control device includes a control circuit that controls the current varying means, and the LED light source device includes a second electrode of the first base, a fourth electrode of the second base, and the fifth and sixth electrodes of the control device. Power can be supplied to the control circuit via The control circuit has a microcomputer and can control the current varying means according to a program of the microcomputer. The control device includes a radio signal receiver, and the radio signal receiver can transmit control information to the control circuit based on a radio signal from a remote control transmitter. The wireless signal may be an infrared signal or a radio signal. Furthermore, the LED light source device may include surge voltage absorbing means for absorbing a surge voltage between the first electrode and the third electrode.

The LED light source device according to the present invention includes a first base having first and second electrodes having the same size and shape as a base pin of a straight tube fluorescent lamp, a second base having third and fourth electrodes, and the first An AC voltage supplied between the first LED of the first base and the third electrode of the second base is converted into a direct current from a rod-shaped LED light source unit having a light emitting diode located between the base and the second base. A power supply circuit unit that converts the voltage into a voltage and supplies current to the LED light source unit. In addition, an LED light source device according to the present invention is an annular LED having a third base having first to fourth electrodes having the same size and shape as a base pin of an annular fluorescent lamp, and a light emitting diode connecting both ends of the third base. A light source unit, and a power supply circuit unit that converts an AC voltage supplied between the first electrode and the third electrode of the third base into a DC voltage and supplies a current to the LED light source unit. LED light source device characterized by this.
The control device according to the present invention is connected between the fifth electrode connected to the second electrode of the LED light source device, the sixth electrode connected to the fourth electrode, and the fifth and sixth electrodes. Current varying means, wherein the fifth and sixth electrodes have the same size and shape as the terminal pins or screw-type caps of the glow starter.

  As described above, according to the present invention, a fluorescent lamp can be easily replaced with an LED light source device without changing the infrastructure of a fluorescent lamp lighting device (lighting fixture) that has already been widely used. Moreover, since the fluorescent lamp and the glow starter can be used by replacing them with an LED light source device and a control device, respectively, an LED lighting device capable of high-efficiency and desired lighting control can be realized at a low cost, and the LED light source device is widely used. A big effect is acquired in the above.

  Embodiments of an LED lighting device according to the present invention will be described below with reference to the drawings.

Example 1
FIG. 1 is a circuit diagram showing a configuration of a first embodiment of an LED lighting device according to the present invention. This apparatus includes a lighting fixture 100 connected to a commercial AC power source 1, an LED light source device 3, and a control device 4. The luminaire 100 includes a fluorescent lamp ballast 2 and socket portions 5, 6, and 14. The LED light source device 3 includes a power supply circuit unit 10, an LED light source unit 11, a base 110 having electrodes 111 and 112, and a base 120 having electrodes 121 and 122. The power supply circuit unit 10 includes a surge absorbing element 7, a rectifier circuit 8, an LED light source unit 11, a switching transistor 30, a current limiting resistor 31, a base resistor 32, a reference power source 33, resistors 34 and 35, a voltage comparator 36, a sawtooth wave. A generator 37 and a transistor 38 are provided. The LED light source unit 11 includes LED elements 12 and 13. The control device 4 includes electrodes 151 and 152 (and a base 150), and a variable resistor 9 as current variable means (impedance variable means) connected between the electrodes 151 and 152. Here, as an electrode of the LED light source device 3, for example, an electrode equivalent to a base pin of a straight tube type or a ring-shaped fluorescent lamp can be used. As an electrode of the control apparatus 4, the thing equivalent to the nozzle | cap | die (or pin) of a glow starter can be used, for example.

  The power supply circuit unit 10 converts an AC voltage supplied between the electrode 111 and the electrode 121 into a DC voltage and supplies a current to the LED light source unit 11. The socket unit 5 has contacts 511 and 512 that are in contact with the electrodes 111 and 112 of the LED light source device 3, respectively. The socket unit 6 has contacts 611 and 612 that are in contact with the electrodes 121 and 122 of the LED light source device 3, respectively. The socket part 14 has contacts 141 and 142 that make contact with the electrodes 151 and 152 of the control device 4, respectively. Means (for example, electric wiring) for electrical connection is provided between the contact 512 of the socket part 5 and the contact 141 of the socket part 14 and between the contact 612 of the socket part 6 and the contact 142 of the socket part 14. It is done. The power supply circuit unit 10 of the LED light source device 3 changes the current passed through the LED light source unit 11 in accordance with the change in resistance value of the variable resistor 9 of the control device 4.

  The socket parts 5 and 6 have the same structure as a socket in which, for example, a general fluorescent lamp base can be mounted. That is, the base is provided on the LED light source device 3 side, and the socket corresponding to the base is provided on the lighting apparatus 100 side, so that the base and the socket can be attached and detached. The same applies to the socket portion 14, and a general glow starter base is provided on the control device 4 side and a socket corresponding to the base is provided on the lighting apparatus 100 side, so that the base and the socket can be attached and detached.

  The AC voltage of the commercial AC power supply 1 is input to the rectifier circuit 8 through the ballast 2 and the socket parts 5 and 6 and converted into a DC voltage. The DC voltage is converted into a constant DC voltage by the reference power supply 33, and the voltage divided by the resistance values of the resistors 34 and 35 and the variable resistor 9 is input to the − input terminal of the voltage comparator 36. A sawtooth wave generated by a sawtooth wave generator 37 is input to the + input terminal of the voltage comparator 36, and a voltage obtained by dividing the voltage of the reference power supply 33 by the resistance values of the resistors 34 and 35 and the variable resistor 9. To be compared.

  FIGS. 3A and 3B are explanatory diagrams illustrating an example of the operation of the power supply circuit unit 10. In the figure, a waveform 22 is an input voltage waveform of the negative input terminal of the voltage comparator 36, a waveform 23 is an input voltage waveform of the positive input terminal of the voltage comparator 36, and a waveform 24 is an output voltage waveform of the voltage comparator 36. During the period when the voltage at the negative input terminal of the voltage comparator 36 is lower than the voltage at the positive input terminal of the voltage comparator 36, a high level voltage shown in the waveform 24 of FIG. The transistor 38 is turned on, the base current flows to the switching transistor 30 through the base resistor 32, the switching transistor 30 is turned on, and the current limited by the current limiting resistor 31 flows to the LED elements 12 and 13 to emit light. On the other hand, during a period in which the voltage at the negative input terminal of the voltage comparator 36 is higher than the voltage at the positive input terminal of the voltage comparator 36, the low level voltage shown in the waveform 24 of FIG. Since the transistor 38 is turned off, no current flows through the LED element. Accordingly, by changing the resistance value of the variable resistor 9, the voltage dividing ratio of the resistors 34 and 35 and the variable resistor 9 is changed, and the voltage at the negative input terminal of the voltage comparator 36 is changed. Since the period during which a high level voltage is output changes and the current flows through the LED elements 12 and 13 as a result, the amount of light generated from the LED elements 12 and 13 can be changed.

  In addition, when the current of the ballast 2 suddenly changes, such as when the power is turned on or when the control device 4 is removed from the socket during operation, a surge voltage may be generated at both ends of the ballast 2, which is an extreme case. The LED lighting circuit composed of the rectifier circuit 8 and the switching transistor 30 may fail due to the influence of the surge voltage. In order to prevent this, for example, the surge absorbing element 7 is provided between the electrode 111 and the electrode 121. As a result, the surge voltage can be absorbed.

  In the first embodiment of the present invention described above, for example, when it is desired to turn on LEDs of different emission colors, this can be achieved by replacing the LED light source unit 11, the LED elements 12, 13, or the LED light source device 3 altogether. When replacing only the LED light source unit 11 or the LED elements 12 and 13, and when replacing the LED light source device 3, the resistors 34 and 35, the reference power source 33, the sawtooth wave generator 37, the voltage comparator 36, etc. If the same design is used, the brightness varying function equivalent to that of the first embodiment can be obtained without replacing the control device 4. Alternatively, the LED light source device 3 is not replaced, and the control device 4 is replaced with another control device including a variable resistor having a resistance change range different from that of the variable resistor 9, so that the LED illumination having a different brightness change range is obtained. A device can also be obtained.

  As the socket of the luminaire 100, any one corresponding to, for example, a straight tube fluorescent lamp or a ring fluorescent lamp can be applied to the LED light source device 3. The control device 4 can be applied to any device corresponding to, for example, an Edison base type (screw type, E17 type) or a pin type (terminal pin type, P21 type) of a glow starter. With respect to the base of the LED light source device 3, for example, when the LED light source device 3 has a rod shape (for example, a straight tube shape) so as to fit the socket of the lighting apparatus 100, the electrodes 111, 112, and 120 of the base 110. Each of 121 and 122 has the same size and shape as the cap pin of the straight tube fluorescent lamp. When the LED light source device 3 has an annular shape, the caps 110 and 120 are integrated, and the electrodes 111, 112, 121, and 122 have the same size and shape as the cap pins of the annular fluorescent lamp. The present invention can also be applied to a luminaire for a small-diameter or general straight tube fluorescent lamp and a luminaire for an annular fluorescent lamp.

(Example 2)
In the first embodiment, an embodiment in which a two-terminal passive element is built in the control device 4 is shown. The second embodiment shows an example in which an active element is incorporated in the control device 4 to perform more complicated control.
FIG. 4 is a circuit diagram showing a configuration of a second embodiment of the LED lighting device according to the present invention. As illustrated, the LED light source device 72 includes a surge absorber 7, a rectifier circuit 8, an LED light source unit 11, a switching transistor 40, an inductor 41, a Schottky diode 42, a capacitor 59, a current detection resistor 43, a diode 44, and a capacitor 46. , Resistors 45 and 47, amplifier 48, capacitor 58, voltage comparator 49, sawtooth wave generator 50, transistor 51, resistor 60, reference power supply 52, current detector 53, and reference voltage generator 54. The control device 71 includes a resistor 55, a control circuit 56, and a transistor 57. Here, the resistor 55 and the transistor 57 constitute current varying means, and the control circuit 56 controls the current varying means to change its output. The control circuit 56 has, for example, a microcomputer, and can control the current varying means in accordance with the microcomputer program. In addition, the same code | symbol as FIG. 1 shows the same or equivalent part.

  The switching transistor 40 repeats ON / OFF operation according to ON / OFF of the transistor 51, and charges the capacitor 59 through the inductor 41. Since back electromotive force is generated from the inductor 41 when the switching transistor 40 is OFF, a current flows through the Schottky diode 42 and charges the capacitor 59 again. In this way, a certain DC voltage is generated at both ends of the capacitor 59 and a current flows through the LEDs 12 and 13. The current flowing through the LEDs 12 and 13 flows to the current detection resistor 43, and a voltage proportional to the current of the LEDs 12 and 13 is generated at both ends of the current detection resistor 43, and the capacitor 46 is charged through the diode 44. The voltage across the capacitor 46 is divided by resistors 45 and 47 and input to the + input terminal of the amplifier 48. Therefore, the voltage input to the + input terminal of the amplifier 48 is a voltage proportional to the current flowing through the LEDs 12 and 13.

  For example, when a current more than a desired current flows through the LEDs 12 and 13, the voltage input to the + input terminal of the amplifier 48 becomes higher than the reference voltage input to the − input terminal of the amplifier 48. The output voltage will rise above normal. The output voltage of the amplifier 48 is connected to the negative input terminal of the voltage comparator 49 and is compared with the output voltage of the sawtooth wave generator 50. Since the output voltage of the amplifier 48 is connected to the negative input terminal of the voltage comparator 49, if the output voltage of the amplifier 48 increases, the voltage input to the negative input terminal of the voltage comparator 49 increases. As described in FIG. 3, the ON duty of the switching transistor 40 decreases. As a result, the voltage across the capacitor 59 decreases and the current flowing through the LEDs 12 and 13 decreases. On the other hand, when a current lower than the desired current flows through the LEDs 12 and 13, the voltage input to the + input terminal of the amplifier 48 becomes lower than the reference voltage input to the − input terminal of the amplifier 48. When the switching transistor 40 is turned ON, the current flowing through the LEDs 12 and 13 increases. As a result of such an operation, the amplifier 48 operates stably where the voltages at the + input terminal and the − input terminal of the amplifier 48 coincide. That is, if the reference voltage input to the negative input terminal of the amplifier 48 is changed, a desired current can be appropriately passed through the LEDs 12 and 13.

  Next, how the control information from the control device side is transmitted to the LED light source device side will be described. The voltage of the reference power supply 52 is input to the control circuit 56 through the current detector 53 and the socket unit 14. The control circuit 56 operates with power supplied from the reference power supply 52. For example, a microcomputer is mounted in the control circuit 56, and the microcomputer 57 is configured to output, for example, a pulse voltage having a predetermined duty to turn on / off the transistor 57. While the transistor 57 is OFF, only the power source current of the control circuit 56 flows through the current detector 53. On the other hand, during the period when the transistor 57 is ON, the current flowing through the resistor 55 flows through the current detector 53 in addition to the power supply current of the control circuit 56. Therefore, it can be seen that the transistor 56 is ON during the period when the current flowing through the current detector 53 is high, and the transistor 57 is OFF during the period when the current flowing through the current detector 53 is low. Therefore, by defining the relationship between the ON duty of the transistor 57 and the output voltage of the reference voltage generator 54 as a configuration of the reference voltage generator 54, a voltage corresponding to the duty of the pulse output from the microcomputer can be obtained. A current corresponding to the output voltage is output from the reference voltage generator 54 and flows from the reference voltage generator 54 to the LEDs 12 and 13. That is, for example, by building a microcomputer program so that the pulse duty changes with time, it is possible to realize an LED lighting device in which the brightness of the LED changes with time.

  FIG. 5 is a diagram illustrating a configuration example of the current detector 53 and the reference voltage generator 54. As shown in the figure, the current detector 53 includes a current detection resistor 90, an amplifier 91, and a reference power source 92, and the reference voltage generator 54 includes resistors 93 and 94, a capacitor 95, a reference power source 96, and an amplifier 97. . 6A to 6D are operation explanatory diagrams of the current detector 53 and the reference voltage generator 54 shown in FIG. FIG. 6A shows the output voltage waveform of the microcomputer. A solid line is a waveform when the duty of the pulse is large, and a broken line is a waveform when the duty is small. FIG. 6B shows a current waveform flowing through the current detector 53. Since the transistor 57 is turned on during a period when the voltage of (a) is high and is turned off during a period when the voltage is high, a large current flows during a period when the voltage of (a) is high. A small current flows during a period when the voltage of (a) is low. FIG. 6C shows a potential difference between both ends of the current detection resistor 90. The potential difference is large during a period when a large current flows, and the potential difference is low during a period when a small current flows. Of the waveforms in FIG. 6D, the pulse waveform is the output waveform of the amplifier 91. The pulse waveforms are averaged by the resistors 93 and 94 and the capacitor 95, and the linear waveform in FIG. The voltage across the capacitor 95 is shown. As can be seen from FIG. 6D, when the pulse duty is large, the voltage across the capacitor 95 is high, and when the pulse duty is small as indicated by the broken line, the voltage across the capacitor 95 is low. The amplifier 97 impedance-converts the voltage of the capacitor 95 and outputs it to the amplifier 48 of FIG.

  The above shows an example of a method of sending control information from the control device 71 to the LED light source device 72 by changing the duty output from the microcomputer. However, the control information is put as digital data on the pulse train output from the microcomputer, and the current A method may be used in which the pulse train is restored by the detector 53, a digital processing circuit and a digital / analog converter are built in the reference voltage generator 54, and a reference voltage corresponding to the digital data represented by the pulse train is generated. . Alternatively, as an analog method, the control information is represented by a voltage value output from the control circuit 56, and the current value passed through the current detection circuit 53 is changed in accordance with the voltage value output from the control circuit 56. A method may be used in which a current corresponding to the value of the current flowing through the LED 53 is supplied to the LEDs 12 and 13.

(Example 3)
FIG. 7 is a diagram showing Example 3 of the LED lighting device according to the present invention. As shown in the figure, if a control device 73 including an infrared remote control receiver 62 and a control circuit 61 is prepared, the control device 71 shown in FIG. The signal is received by the infrared remote control receiver 62, the received information is sent to the control circuit 61, and the duty of the pulse voltage output from the control circuit 61 can be changed. The operation described in the embodiment of FIG. Similarly, the current detector 53 detects a change in current associated with ON / OFF of the transistor 57, thereby detecting the ON duty of the transistor 57. The ON duty of the transistor 57 set in advance and the output voltage of the reference voltage generator 54 are detected. As a result, the output voltage of the reference voltage generator 54 changes, and as a result, the brightness of the LED changes to the desired brightness. It is possible to realize a LED lighting device which can control the brightness of the LED by the line remote control.

Example 4
In the first to third embodiments, the light emission color of the LED light source device is constant and only the brightness is changed. In the fourth embodiment, the light emission color can be changed.
FIG. 8 is a circuit diagram showing a configuration of a fourth embodiment of the LED lighting device according to the present invention. As illustrated, the LED light source device 75 includes a plurality of LED light source units 17a and 17b. The power supply circuit unit 10 further includes a switching transistor 80, an inductor 81, a Schottky diode 82, a capacitor 124, a current detection resistor 83, a diode 84, a capacitor 86, resistors 85 and 87, an amplifier 88, a capacitor 120, a voltage comparator 89, a sawtooth. A wave generator 121, a transistor 122, a resistor 123, and a reference voltage generator 63 are provided. The control device 74 includes a control circuit 64. The LED light source units 17a and 17b include LEDs 12 and 13 and LEDs 15 and 16, respectively. The LEDs 12 and 13 and the LEDs 15 and 16 have the same emission color, and the LED 12 and the LED 15 have different emission colors. In addition, the same code | symbol as FIG. 4 shows the same or equivalent part.

Switching transistor 80, inductor 81, Schottky diode 82, capacitor 124, current detection resistor 83, diode 84, capacitor 86, resistors 85 and 87, amplifier 88, capacitor 120, voltage comparator 89, sawtooth generator 121, transistor 122 and the resistor 123 are the switching transistor 40, inductor 41, Schottky diode 42, capacitor 59, current detection resistor 43, diode 44, capacitor 46, resistors 45 and 47, amplifier 48, capacitor 58, The same operation as that of the voltage comparator 49, the sawtooth wave generator 50, the transistor 51, and the resistor 60 is performed.
Since the reference signal generator 63 outputs different reference voltages for the amplifier 49 and the amplifier 88, the amount of light emitted from the LEDs having different emission colors can be changed separately, and the color of light obtained by mixing the two can be appropriately selected. The color can be changed.

  FIG. 9 is a diagram illustrating a configuration example of the reference voltage generator 63. In the figure, reference numeral 130 denotes an amplifier, 131 denotes an inverting amplifier, and other reference numerals the same as those in FIG. 5 denote the same or equivalent parts. In the example of FIG. 9, as described in the second embodiment, the voltage corresponding to the duty of the pulse voltage output from the control circuit 64 is impedance-converted by 130 amplifiers and output to the amplifier 49. The voltage corresponding to the duty of the pulse voltage output from is inverted and impedance-converted by the inverting amplifier 131 and output to the amplifier 88. Therefore, when the duty of the pulse voltage output from the control circuit 64 is large, a high reference voltage is output to the amplifier 49 and a low reference voltage is output to the amplifier 88. Therefore, the current flowing through the LEDs 12 and 13 increases to emit light brightly, and the current flowing through the LEDs 15 and 16 decreases to emit light darkly. On the other hand, when the duty of the pulse voltage output from the control circuit 64 is small, a low reference voltage is output to the amplifier 49 and a high reference voltage is output to the amplifier 88. Therefore, the LEDs 12 and 13 are dark and the LEDs 15 and 16 emit light brightly. Therefore, by changing the duty of the pulse voltage output from the control circuit 64, the ratio of the two different colors of emitted light changes, so that the color of the emitted light after color mixing changes.

FIG. 10 is a diagram illustrating another configuration example of the reference voltage generator 63. As shown, the reference voltage generator 63 includes a logic circuit 132 and digital-analog converters 133 and 134. FIG. 10 is an application of the method described in the second embodiment for putting control information as digital data on a pulse train. From the pulse train restored by the current detector 53, the logic circuit 132 distributes the control information on the LED 12 and 13 side and the control information on the LED 15 and 16 side, and outputs digital values to the digital-analog converters 133 and 134, respectively. By outputting the reference voltage from the digital-analog converters 133 and 134 to the amplifiers 49 and 88, the same control as described above can be performed.
In the above description, an example of two systems of LEDs 12 and 13 and LEDs 14 and 15 has been shown, but the number of systems can be arbitrarily increased by the same method.

  The present invention relates to an LED illumination device that includes an LED light source unit having a light emitting diode and has a function of controlling the luminance and color tone of output light, and has industrial applicability.

It is a circuit diagram which shows the structure of Example 1 of the LED lighting apparatus which concerns on this invention. It is a figure which shows an example of the lighting device of the fluorescent lamp generally spread. (A), (b) is explanatory drawing which shows an example of operation | movement of a power supply circuit part. It is a circuit diagram which shows the structure of Example 2 of the LED lighting apparatus which concerns on this invention. It is a figure which shows the structural example of a current detector and a reference voltage generator. (A)-(d) is operation | movement explanatory drawing of the current detector and reference voltage generator which are shown in FIG. It is a figure which shows Example 3 of the LED lighting apparatus which concerns on this invention. It is a circuit diagram which shows the structure of Example 4 of the LED lighting apparatus which concerns on this invention. It is a figure which shows the example of 1 structure of a reference voltage generator. It is a figure which shows the other structural example of a reference voltage generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Commercial AC power supply, 2 ... Ballast, 3 ... LED light source device, 4 ... Control apparatus, 5 and 6 ... Socket part, 7 ... Surge absorption element, 8 ... Rectifier circuit, 9 ... Variable resistor, 10 ... Power supply circuit 11, LED light source unit, 14 socket unit, 30 switching transistor, 31 current limiting resistor, 32 base resistor, 33 reference power source, 34 and 35 resistor, 36 voltage comparator, 37 sawtooth Wave generator, 38 ... transistor, 100 ... lighting fixture

Claims (12)

A first base having first and second electrodes, a second base having third and fourth electrodes, an LED light source unit having a light emitting diode, the first electrode of the first base, and the second base An LED light source device including a power supply circuit unit that converts an alternating voltage supplied between the third electrode and the third electrode into a direct current voltage and supplies a current to the LED light source unit;
A control device comprising fifth and sixth electrodes and current varying means connected between the fifth and sixth electrodes;
A first socket portion having first and second contacts that contact the first and second electrodes of the first base; and third and fourth contacts that contact the third and fourth electrodes of the second base, respectively. A second socket part, a third socket part having fifth and sixth contacts that contact the fifth and sixth electrodes of the control device, respectively, a second contact of the first socket part and the third socket Means for electrically connecting between the fifth contact of the second socket portion and between the fourth contact of the second socket portion and the sixth contact of the third socket portion;
Comprising
The LED lighting device, wherein the power source circuit unit of the LED light source device changes a current flowing through the LED light source unit in accordance with an output of a current varying unit of the control device.   The LED lighting device according to claim 1, wherein the first to fourth electrodes of the LED light source device have the same size and shape as a cap pin of a straight fluorescent lamp.   The LED light source device includes a third base having first to fourth electrodes instead of the first base having the first and second electrodes and the second base having the third and fourth electrodes. The LED lighting device according to claim 1, wherein   4. The LED lighting device according to claim 3, wherein the first to fourth electrodes of the LED light source device have the same size and shape as the base pin of the annular fluorescent lamp.   5. The LED lighting device according to claim 1, wherein the fifth and sixth electrodes of the control device have the same size and shape as a terminal pin of a glow starter.   5. The LED lighting device according to claim 1, wherein the fifth and sixth electrodes of the control device are formed as a base having the same size and shape as a screw-type base of a glow starter. .   The LED light source device includes a plurality of the LED light source units, and the power supply circuit unit can individually change the currents flowing through the plurality of LED light source units in accordance with the output of the current variable means. The LED lighting device according to claim 1.   The control device includes a control circuit that controls the current varying means, and the LED light source device includes a second electrode of the first base, a fourth electrode of the second base, and the fifth and sixth electrodes of the control device. The LED lighting device according to claim 1, wherein power is supplied to the control circuit via a LED.   9. The LED lighting device according to claim 8, wherein the control circuit includes a microcomputer and controls the current varying means in accordance with a program of the microcomputer.   10. The LED illumination according to claim 8, wherein the control device includes a wireless signal receiver, and the wireless signal receiver transmits control information to the control circuit based on a wireless signal from a remote control transmitter. apparatus.   The LED illumination device according to claim 10, wherein the wireless signal is an infrared signal or a radio signal. The LED lighting device according to any one of claims 1 to 11, wherein the LED light source device includes surge voltage absorbing means for absorbing a surge voltage between the first electrode and the third electrode.

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