JP2010153345A - Led illumination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED illumination device in which current flowing in the LED can be made to have a prescribed current value even if a resistor or a constant current circuit is not connected. <P>SOLUTION: The LED illumination device A is equipped with a stabilizer B1 in order to stabilize an alternate current input from an alternate power source D, a rectifying circuit 1 to carry out a full-wave rectification on the alternate current input from the stabilizer B1, a plurality of LEDs 31a in which direct current is input from the rectifying circuit 1 and light is emitted, a substrate mounted with the LEDs 31a, and a light-emitting circuit 3 consisting solely of connecting wires to connect respective LEDs 31a and directly connected to the rectifying circuit 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an LED lighting device.

  Conventionally, lighting fixtures using fluorescent lamps have become widespread. On the other hand, a light emitting diode (LED) is superior to a fluorescent lamp in terms of power consumption and life. In recent years, LED lighting devices have been developed in which an LED lamp is attached to a conventional lighting fixture using a fluorescent lamp.

  FIG. 4 is a block diagram for explaining an LED illumination apparatus in which an LED lamp is attached to a conventional general fluorescent lamp illuminator. The general fluorescent lamp illuminator is a luminaire widely used mainly for indoor general illumination. For example, in Japan, a commercial 100V or 200V power supply is used, and a straight tube fluorescent lamp defined in JIS C7617 is used. This refers to a luminaire to which a lamp or an annular fluorescent lamp defined in JIS C7618 is attached. The LED lighting device A ′ includes a general fluorescent lamp luminaire B and an LED lamp C ′.

The general fluorescent lamp luminaire B is intended to input an alternating current from a commercial 100V power supply D to the fluorescent lamp to which it is attached. The general fluorescent lamp luminaire B includes a ballast B1. The ballast B1 generates a high voltage in the fluorescent lamp to start discharge, and stabilizes the current input to the fluorescent lamp after the start of discharge. The general fluorescent lamp luminaire B is classified into a starter type, a rapid start type, an inverter type, and the like depending on the lighting method of the fluorescent lamp. When the LED lamp C ′ is mounted, the voltage, current, and frequency output from the ballast B1 differ depending on the method even if the same rated voltage is set. Moreover, even if it is the same system, the characteristic of ballast B1 changes little by little for every kind of fluorescent lamp lighting fixture B for general uses.

The LED lamp C ′ emits light when an alternating current is input from a commercial 100V power source D via the ballast B1 of the general fluorescent lamp luminaire B. The LED lamp C ′ includes a rectifier circuit 100, a protective component 200, and an LED light emitting circuit 300. The rectifier circuit 100 converts the alternating current input from the ballast B1 into a direct current and outputs the direct current to the LED light emitting circuit 300. The LED light emitting circuit 300 causes the white LED 310 a included in the LED light emitting circuit 300 to emit light by the direct current input from the rectifier circuit 100. In the LED light emitting circuit 300, the standard and the number of series of white LEDs 310a constituting the LED array 310 and the resistance value of the resistor 320 are determined in accordance with the rated voltage of the general fluorescent lamp luminaire B to be attached.

  Since the input voltage, current, and frequency differ depending on the ballast B1, the LED light emitting circuit 300 is provided with a resistor 320 in order to prevent an overcurrent from flowing through the white LED 310a. In order to keep the current flowing through the white LED 310a constant, it has also been proposed to connect a constant current circuit such as a constant current diode in series with the input side of the white LED 310a.

JP-A-5-66718 JP 2004-303614 A

  However, the resistor 320 consumes waste by converting electric power to heat, so that the power use efficiency is reduced. Moreover, when connecting a constant current circuit, it is necessary to provide the LED light emission circuit 300 with the area | region which installs these. Since the white LED 310a cannot be mounted in this region, a dark region that does not emit light is enlarged. Further, there is a disadvantage that the manufacturing cost is increased by the constant current circuit.

  The present invention has been conceived under the circumstances described above, and an LED lighting device capable of setting a current flowing in an LED to a predetermined current without connecting a resistor, a constant current circuit, or the like. Its purpose is to provide.

  In order to solve the above problems, the present invention takes the following technical means.

  The LED lighting device provided by the present invention includes a ballast for stabilizing an alternating current input from an alternating current power supply, a rectifier circuit that performs full-wave rectification on the alternating current input from the ballast, and the rectifier circuit. A plurality of LEDs that emit light when a direct current is input from, a substrate on which the LEDs are mounted, and a light emitting circuit that is directly connected to the rectifier circuit, and includes a connection line that connects the LEDs. And

  In a preferred embodiment of the present invention, the light emitting circuit has a plurality of LED rows in which a plurality of LEDs are connected in series, and the plurality of LED rows are connected in parallel.

  In a preferred embodiment of the present invention, a protective component is connected between the rectifier circuit and the light emitting circuit.

  In a preferred embodiment of the present invention, the protective component is a Zener diode or a fuse.

  In a preferred embodiment of the present invention, a pair of power supply terminals for supplying alternating current from the ballast to the rectifier circuit is provided, and each of the power supply terminals has a pair of terminal pins that are electrically connected to each other. is doing.

  In another preferred embodiment of the present invention, a pair of power supply terminals for supplying an alternating current from the ballast to the rectifier circuit is provided, and the power supply terminals are a pair of terminals insulated from each other. One of the pair of terminal pins is connected to the rectifier circuit.

  In a more preferred embodiment of the present invention, a cylindrical case that houses the light emitting circuit and the rectifier circuit is provided, and the rectifier circuit is disposed so as to sandwich the light emitting circuit in the longitudinal direction of the cylindrical case. The pair of power terminals are attached to both ends in the longitudinal direction of the cylindrical case, and the power terminals installed at one end in the longitudinal direction of the cylindrical case are: Connected to the rectifier circuit arranged on one side of the light emitting circuit in the longitudinal direction of the cylindrical case, the power supply terminal installed at the other end in the longitudinal direction of the cylindrical case, It is connected to the rectifier circuit arranged on the other side of the light emitting circuit in the longitudinal direction of the cylindrical case.

  In a more preferred embodiment of the present invention, a discharge resistor is provided in parallel with the light emitting circuit.

  In a more preferred embodiment of the present invention, a discharging resistor in parallel with the light emitting circuit is disposed between one and the other ends of the light emitting circuit in the longitudinal direction of the cylindrical case and the rectifier circuit. Yes.

  Since the LED lighting device according to the present invention does not include a resistor in the light emitting circuit, the power use efficiency can be improved. In addition, since the constant current circuit is not provided in the light emitting circuit, a region where the LED is not mounted can be reduced, and the manufacturing cost can be reduced.

It is a block diagram for demonstrating 1st Embodiment of the LED lighting apparatus concerning this invention. It is a wiring diagram which shows 2nd Embodiment of the LED lighting apparatus concerning this invention. It is a wiring diagram which shows 3rd Embodiment of the LED lighting apparatus concerning this invention. It is a block diagram for demonstrating the LED lighting apparatus which attached the LED lamp to the conventional general fluorescent lamp lighting fixture.

  FIG. 1 is a block diagram for explaining a first embodiment of an LED lighting device according to the present invention. The LED lighting device A1 includes a general fluorescent lamp luminaire B and an LED lamp C1.

  For example, in the case of a starter type, the general fluorescent lamp luminaire B has four types: a ballast B1 for controlling an alternating current flowing in the fluorescent lamp, a lighting tube (not shown) for lighting the fluorescent lamp, and a fluorescent lamp. Four insertion ports (not shown) for connecting the terminals are provided. Two of the outlets are for inputting an alternating current to the fluorescent lamp, and the other two are connected to the lighting tube. In this embodiment, since a lighting tube is not used, in FIG. 1, wiring corresponding to the insertion port connected to the lighting tube is omitted. In this embodiment, it can be considered that the general fluorescent lamp luminaire B substantially outputs an alternating current input from the commercial 100V power source D to the LED lamp C1 through the ballast B1.

  The LED lamp C is attached to a general fluorescent lamp luminaire B, and an alternating current is input from the ballast B1. The LED lamp C1 includes a rectifier circuit 1, a protective component 2, and an LED light emitting circuit 3.

  The rectifier circuit 1 converts the alternating current input from the ballast B1 into a direct current and outputs the direct current. The rectifier circuit 1 includes a diode bridge (not shown) that performs full-wave rectification. The direct current output from the rectifier circuit 1 becomes a smoothed current by the function of the ballast B1 for stabilizing the current. In addition, the structure of the rectifier circuit 1 is not restricted to this, What is necessary is just to convert an alternating current into a direct current.

  The protective component 2 is for preventing a current exceeding a predetermined value from flowing through the LED light emitting circuit 3. In the present embodiment, the Zener diode 2 is used, and is energized when a voltage higher than a predetermined voltage is applied, so that no current flows through the LED light emitting circuit 3. Since it suffices to cut off the current flowing through the LED light emitting circuit 3, a fuse or the like may be used instead. These should be used for safety of use, and are not necessarily required as the configuration of the present invention.

  The LED light emitting circuit 3 receives light from the rectifier circuit 1 and emits light. The LED light emitting circuit 3 includes a plurality of LED rows 31 in which a plurality of white LEDs 31a are connected in series. Each LED row 31 is connected in parallel, and the cathode side is grounded. Each white LED 31a emits white light when a direct current is input from the anode side.

  The number of white LEDs 31a in the LED array 31 (hereinafter referred to as “the number of LEDs in series”) and the number of LED arrays 31 (hereinafter referred to as “the number of LEDs in parallel”) It is determined in accordance with the characteristics of the ballast B1 of the general fluorescent lamp luminaire B to be mounted. The power consumption varies depending on the number of LEDs in series, and the characteristics of the variation vary depending on the type of the ballast B1. The number of LEDs in series is appropriately determined according to the required power consumption. When the number of LEDs in series is determined, the output current of the ballast B1 is determined, so the parallel number is determined so that the current flowing through each white LED 31a is equal to or less than the rated current.

  Next, the operation of the LED lighting device A1 will be described.

  According to the present embodiment, the number of LEDs in series and the number of parallel LEDs are determined so that the current flowing through each white LED 31a becomes a predetermined current according to the characteristics of the ballast B1 of the general fluorescent lamp lighting fixture to be attached. The Therefore, even if the LED light emitting circuit 3 is not provided with a resistor or a constant current circuit, the current flowing through the white LED 31a can be set to a predetermined current. Thereby, the utilization efficiency of electric power can be improved as compared with the case where the resistor is provided, and the dark area where the LED light emitting circuit 3 does not emit light can be reduced and the manufacturing cost can be reduced as compared with the case where the constant current circuit is provided.

  Although the said embodiment demonstrated the case where the LED lamp C1 was attached to the starter type general fluorescent lamp lighting fixture B, it is not limited to this. Even when the general fluorescent lamp luminaire B is a rapid start type or an inverter type, the present invention can be applied by determining the number of LEDs in series and the number in parallel according to the characteristics of the ballast B1.

  FIG. 2 is a wiring diagram showing a second embodiment of the LED lighting device according to the present invention. The illuminating device A2 shown in FIG. 1 includes a general fluorescent lamp luminaire Bg and an LED lamp C2. In FIG. 2, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment, and description thereof will be omitted as appropriate.

  The general fluorescent lamp illuminator Bg in the present embodiment is a glow starter system, and incorporates a commercial 100V power source D, a ballast B2, a glow switch G, and a socket S. The ballast B2 is, for example, a choke coil. Each socket S includes two insertion ports Sd and Sg arranged in parallel. The insertion port Sg is electrically connected to the glow switch G, and the insertion port Sd is electrically connected to the commercial 100V power source D.

  The LED lamp C2 includes a rectifier circuit 1, a protective component 2, an LED light emitting circuit 3, four terminal pins 4, a pair of caps 5, two smoothing capacitors 6, two discharge resistor groups 7, and two resistors 8 , A substrate 9 and a cylindrical case 10 are provided. The LED lamp C2 is used by being attached to a general fluorescent lamp luminaire B as an alternative to a glow starter type fluorescent lamp. Note that when the LED lamp C2 is attached, it is preferable to remove the glow switch G because the glow switch G used for lighting the fluorescent lamp is unnecessary.

  The substrate 9 is mounted with the rectifier circuit 1, the protective component 2, the LED light emitting circuit 3, the two smoothing capacitors 6, the two discharge resistor groups 7, and the two resistors 8. The substrate 9 has a long rectangular shape and is accommodated in the cylindrical case 10. The cylindrical case 10 is formed in an elongated cylindrical shape that looks like a fluorescent lamp. A pair of caps 5 are attached to both ends of the cylindrical case 10 in the longitudinal direction. Each base 5 holds two terminal pins 4. These two terminal pins 4 are power supply terminals in the present invention.

  In the present embodiment, the two terminal pins 4 held by each base 5 are electrically connected. Further, a resistor 8 is disposed between the two terminal pins 4 held by each base 5.

  The rectifier circuit 1 includes diodes 11, 12, 13, and 14 and two transformers 15 and 16 that form a diode bridge.

  The transformers 15 and 16 are installed at both ends of the substrate 9. The transformer 15 installed at one end is electrically connected to both of the two terminal pins 4 held by one base 5 attached to one end of the cylindrical case 10. The transformer 16 installed at the other end is electrically connected to both of the two terminal pins 4 held by the other base 5 attached to the other end of the cylindrical case 10.

  A transformer 15 installed at one end is connected to each of the diodes 11 and 12, and a transformer 16 installed at the other end is connected to each of the diodes 13 and 14.

  Each smoothing capacitor 6 is disposed on one side and the end side of the substrate 9 so as to sandwich the LED light emitting circuit 3. Each smoothing capacitor 6 is arranged in parallel with each set of the plurality of white LED rows 31.

  Each discharge resistor group 7 is installed on one side and the end side of the substrate 1 so as to sandwich the LED light emitting circuit 3 and each smoothing capacitor 6. Each discharge resistance group 7 is arranged in parallel with each set of the plurality of white LED rows 31. Each discharge resistance group 7 includes a plurality of resistors arranged in series. For example, the total resistance value is 500 kΩ. Each discharge resistance group 7 may be constituted by a single resistor.

  The protective component 2 is installed on one side and the end side of the substrate 9 so as to sandwich the LED light emitting circuit 3, each smoothing capacitor 6, and each discharging resistor group 7.

  Next, the operation of the LED lighting device A2 having the above configuration will be described.

  In the LED lighting device A2 described above, the two terminal pins 4 held by the caps 5 are electrically connected to each other. Therefore, even if any of the terminal pins 4 is inserted into the insertion port Sd, the LED light emitting circuit 3 is connected. Can be turned on. For this reason, in LED lighting apparatus A2, when attaching LED lamp C2 to the fluorescent lamp lighting fixture Bg for general use, since it is not necessary to stick to the attachment direction etc., it can mount easily. Therefore, in the LED illumination device A2, the LED lamp C2 can be preferably used as an alternative to the glow starter type fluorescent lamp.

  Further, in the present embodiment, since the discharge resistor group 7 is provided in parallel with the plurality of LED rows 31 of the LED light emitting circuit 3, the electric power charged in the plurality of white LEDs 31a and the smoothing capacitor 6 is quickly supplied when the light is turned off. Can be consumed. For this reason, LED lighting apparatus A2 can be rapidly turned off.

  FIG. 3 is a wiring diagram showing a third embodiment of the LED lighting device according to the present invention. The LED lighting device A3 shown in FIG. 3 includes a general fluorescent lamp luminaire Br and an LED lamp C3. In FIG. 3, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment, and description thereof will be omitted as appropriate.

  The general fluorescent lamp illuminating device Br in the present embodiment is a rapid starter system, and includes a commercial 100V power source D, a rapid starter type ballast B3, and sockets Sa and Sb. The socket Sa is in contact with the base 5 on one side in the longitudinal direction of the substrate 9, and the socket Sb is in contact with the base 5 on the other side. The sockets S1 and S2 of the socket Sa and the sockets S3 and S4 of the socket Sb are all connected to the commercial 100V power source D via the ballast B3.

  The LED lamp C3 is attached to a general fluorescent lamp luminaire Br as an alternative to a rapid starter type fluorescent lamp. The LED lamp C3 is different from the LED lamp C2 in that the terminal pins 41 and 42 and the terminal pins 43 and 44 held by one and the other cap 5 are insulated, and only the terminal pins 41 and 44 are connected to the transformers 15 and 16. It is connected. Further, the resistor 9 is not installed. The other structure of the LED lamp C3 is the same as that of the LED lamp C2.

  As described above, in the general fluorescent lamp luminaire Br corresponding to the rapid starter type fluorescent lamp, the insertion ports S1, S2, S3 and S4 are all connected to the commercial 100V power source D, unlike the case of the glow starter type. Has been. For this reason, the LED lamp C3 can be preferably used as an alternative to a rapid starter type fluorescent lamp by connecting only the terminal pins 41 and 44 to the transformers 15 and 16.

  Further, since the LED lamp C3 is also provided with the discharge resistor group 7 in parallel with the plurality of white LED rows 31, the power charged in the plurality of white LEDs 31a and the smoothing capacitor 6 is quickly consumed when the light is turned off. be able to. For this reason, LED lighting apparatus A3 can be quickly turned off.

  The LED lamp C3 can be shared with the LED lamp C2 except for the wiring around the terminal pins 41, 42, 43, and 44. For this reason, when both the LED lamps C2 and C3 are produced, it is easy to reduce the production cost.

  The LED lighting device according to the present invention is not limited to the above-described embodiment. The specific configuration of each part of the LED lighting device according to the present invention can be varied in design in various ways. For example, in the third embodiment, the terminal pins 41 and 44 positioned on the opposite side in the width direction of the substrate 1 are connected to the transformers 15 and 16, but the terminal pins 41 and 43 positioned on the same side are connected. It may be connected to the transformers 15 and 16.

  In addition, the shape of LED lamp C1, C2, C3 is not limited, It can be set as the shape match | combined with the general fluorescent lamp lighting fixture B, Bg, Br to be attached. For example, when attaching to a general fluorescent lamp luminaire B, Bg, Br for a straight tube fluorescent lamp, the shape of the LED lamps C1, C2, C3 is the same as that of the straight tube fluorescent lamp, and a general use for a ring fluorescent lamp When attaching to the fluorescent lamp luminaires BB, Bg, Br, the shape of the LED lamps C1, C2, C3C may be the same as that of the annular fluorescent lamp. The LED light emitting circuit 3 may include a red LED, a green LED, and a blue LED instead of the white LED 31a to emit white light. Moreover, you may comprise so that light other than white light may be emitted.

  In recent years, as a substitute for fluorescent lamps, there has been a demand for an illuminating device that uses LEDs that consume less power and do not use harmful substances such as mercury as a light source. According to the LED lighting apparatus according to the present invention, it is possible to easily switch from a fluorescent lamp to an LED lamp by using an existing general fluorescent lamp lighting fixture.

A1, A2, A3 LED lighting devices B, Bg, Br Fluorescent lamps for general use C1, C2, C3 LED lamp 1 Rectifier circuit 2 Protection component 3 LED light emitting circuit 4 Terminal pin 5 Cap 6 Smoothing capacitor 7 Discharge resistor group 8 Resistance 9 Substrate 10 Cylindrical case 11, 12, 13, 14 Diode 15, 16 Transformer 31 White LED array 31a White LED
41, 42, 43, 44 Terminal pin D Commercial 100V power supply G Glow switch B1, B2, B3 Ballast S, Sa, Sb Socket

Claims (9)

A ballast for stabilizing the alternating current input from the alternating current power supply;
A rectifier circuit that performs full-wave rectification on the alternating current input from the ballast;
A plurality of LEDs that receive direct current from the rectifier circuit to emit light, a substrate on which the LEDs are mounted, and a connection line that connects each LED; a light-emitting circuit that is directly connected to the rectifier circuit;
An LED lighting device comprising:   The LED lighting device according to claim 1, wherein the light emitting circuit includes a plurality of LED rows in which a plurality of LEDs are connected in series, and the plurality of LED rows are connected in parallel.   The LED lighting device according to claim 1, wherein a protective component is connected between the rectifier circuit and the light emitting circuit.   The LED lighting device according to claim 3, wherein the protective component is a Zener diode or a fuse. A pair of power supply terminals for supplying alternating current from the ballast to the rectifier circuit;
Each said power supply terminal is a LED lighting apparatus in any one of Claim 1 thru | or 4 which has a pair of terminal pin which conduct | electrically_connects mutually. A pair of power supply terminals for supplying alternating current from the ballast to the rectifier circuit;
Each of the power terminals has a pair of terminal pins insulated from each other,
The LED lighting device according to any one of claims 1 to 4, wherein one of the pair of terminal pins is connected to the rectifier circuit. It has a cylindrical case that houses the light emitting circuit and the rectifier circuit,
The rectifier circuit is arranged so as to sandwich the light emitting circuit in the longitudinal direction of the cylindrical case,
The pair of power terminals are attached to both ends in the longitudinal direction of the cylindrical case,
The power supply terminal installed at one end in the longitudinal direction of the cylindrical case is connected to the rectifier circuit disposed on one side of the light emitting circuit in the longitudinal direction of the cylindrical case,
The power supply terminal installed at the other end in the longitudinal direction of the cylindrical case is connected to the rectifier circuit disposed on the other side of the light emitting circuit in the longitudinal direction of the cylindrical case. Item 7. The LED illumination device according to Item 5 or 6.   The LED lighting device according to claim 5, further comprising a discharging resistor arranged in parallel with the light emitting circuit.   The LED lighting device according to claim 7, wherein a discharge resistor parallel to the light emitting circuit is disposed between one and the other ends of the light emitting circuit in the longitudinal direction of the cylindrical case and the rectifier circuit. .

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